Control-flow aware allocation has been enabled by default for a long
time now. This removes the unused code paths related to splintering.
R=neis@chromium.org
Bug: v8:10933
Change-Id: I19d9eb448c3912b24a1ad16030e7dd556b13accc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2434328
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70172}
This reverts commit 2221f0909b.
Reason for revert: fix in patchset 2
Original change's description:
> Revert "cppgc: Provide jobs support through DefaultPlatform and TestPlatform"
>
> This reverts commit 22c0fc8f2e.
>
> Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/8712?
>
> Original change's description:
> > cppgc: Provide jobs support through DefaultPlatform and TestPlatform
> >
> > This CL extends cppgc::DefaultPlatform and TestPlatform to emulate
> > jobs using std::thread and v8::base::Thread respectively.
> > Jobs using these platform do not yield unless the job as been
> > cancelled. Additionally, the job priority is ignored.
> >
> > Bug: chromium:1056170
> > Change-Id: I72db1eef410d2be3d3e5ea7d4ece9e5584a451f2
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416378
> > Commit-Queue: Omer Katz <omerkatz@chromium.org>
> > Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#70139}
>
> TBR=mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
>
> Change-Id: Ic29235e3ab78a1b515a5b14b808e116a1ccffc0f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:1056170
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2432087
> Reviewed-by: Francis McCabe <fgm@chromium.org>
> Commit-Queue: Francis McCabe <fgm@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70142}
# Not skipping CQ checks because this is a reland.
Bug: chromium:1056170
Change-Id: Iaa8312da759ab97f646a9fb6144462a115393b5f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2431666
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70150}
These instructions were changed from "s8x16" to "i8x16" prefixes in
https://github.com/WebAssembly/simd/pull/321.
This CL updates all V8 code, including arch-specific code, to match.
Bug: v8:10946, v8:10933
Change-Id: I26ef9ad77571f94501d42c1d65f57380fd507f3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2432068
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70143}
This reverts commit 22c0fc8f2e.
Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/8712?
Original change's description:
> cppgc: Provide jobs support through DefaultPlatform and TestPlatform
>
> This CL extends cppgc::DefaultPlatform and TestPlatform to emulate
> jobs using std::thread and v8::base::Thread respectively.
> Jobs using these platform do not yield unless the job as been
> cancelled. Additionally, the job priority is ignored.
>
> Bug: chromium:1056170
> Change-Id: I72db1eef410d2be3d3e5ea7d4ece9e5584a451f2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416378
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70139}
TBR=mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
Change-Id: Ic29235e3ab78a1b515a5b14b808e116a1ccffc0f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2432087
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70142}
This CL extends cppgc::DefaultPlatform and TestPlatform to emulate
jobs using std::thread and v8::base::Thread respectively.
Jobs using these platform do not yield unless the job as been
cancelled. Additionally, the job priority is ignored.
Bug: chromium:1056170
Change-Id: I72db1eef410d2be3d3e5ea7d4ece9e5584a451f2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416378
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70139}
Changes:
- Add dedicated exception for call_ref invoking a WasmJSFunction.
- Small restructuring of read_value_type.
- Change HeapType::kLastSentinel to point to the last valid type,
update is_valid().
- Remove redundant DCHECK from ValueType constructors.
- Rename a few section-related macros in module-decoder-unittest.cc,
add a small test.
- Rename "Simd128" -> "s128" in error message.
- Write some documentation, mostly in value-type.h and wasm-subtyping.h.
Bug: v8:7748
Change-Id: I4fc4826fbdeac50e21ef524787c2024d7aa1b3b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2424139
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70118}
Avoid data race by only setting FLAG_local_heaps to true if not
already enabled.
Bug: v8:10315
Change-Id: Ib562b6d525448f5c088da39bf60928debd97db43
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2426610
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70115}
This is a first small step for implementing the memory64 proposal:
1. Add a feature flag.
2. Add the 0x04 and 0x05 limits flag for memory64.
3. Read memory limits as LEB-encoded u64 (instead of u32) if a memory64
limit flag was read.
4. Unify {MaximumFlag} and {MemoryFlag}, which was used inconsistently
before.
5. Add test for memory limits encoded with >5 bytes.
6. Move some macros from module-decoder-unittest.cc to wasm-macro-gen.h.
Note that still the same limits for the maximum number of pages applies
as before, i.e. you cannot specify a memory >4GB yet. But you can encode
that small number in >5 bytes.
R=manoskouk@chromium.org
Bug: v8:10949
Change-Id: I90a4f08426ae714a67440281785eb00cfc24a349
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2423712
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70110}
This fixes a bug caused by StartFunction() being called for an invalid
module.
Bug: v8:7748
Change-Id: I47a3f3573355d87554b123dd1edc7c829bb43d0e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2423710
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70081}
Using associative property of addition: (x + A) + B => x + (A + B).
Note: A and B need to have the same sign and we need to check that
(x + A) isn't used anywhere else.
20% perf improvement of the following function.
function f(n) {
var c = 0;
for (var i = 0; i < n; i++) {
c = c + 2 + 3;
}
return c;
}
for n = 10_000_000.
Before: 7.31s.
After: 6.05s.
Bug: v8:10305
Change-Id: If45d1cad6128a9a25cb9f43a4828ae28d594a84b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2365221
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70064}
Changes:
- When checking if a table is a function table, check for subtyping to
funcref instead of equality.
- Add WasmModuleObject argument to GetFunctionTableEntry.
- Implement WasmTableObject::Get/Set for all legal table types.
- Factor out SetFunctionTableEntry from WasmTableObject::Set.
- Write unittests and JS tests.
Bug: v8:9495
Change-Id: I4f0c7a7013f17c561afb3039c5e0811634a4d313
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416387
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70032}
Changes:
- Rename IsSignatureEqual -> MatchesSignature for consistency
- Add WasmInstanceObject field to WasmTableObject.
- Improve some error messages related to tables in
function-body-decoder-impl.h.
- Introduce WasmTable::IsValidTableType. Use it wherever appropriate.
- Overload equality operators in HeapType to work with
HeapType::Representation.
- Rename DynamicTypeCheckRef -> TypecheckJSObject.
- Handle WasmCapiFunctions in TypecheckJSObject.
- Use TypecheckJSObject in WasmTableObject::IsValidElement.
- A few more minor improvements.
Bug: v8:9495
Change-Id: I2867dd3486d7c31717ac26b87a50e15cf2b898be
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416491
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70001}
To let the user do special handling on the main thread e.g. Scavenging
uses different tracing categories for background/foreground threads.
Change-Id: I6c9187fd6201b5b81cd83727727fda49fcf7ff68
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2405797
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69978}
For the standalone library, some platform implementations might not
support non-nested tasks. We can still offer incremental marking in
such cases using regular tasks and without assuming an empty stack.
(cppgc's default platform e.g. doesn't support non-nested tasks.)
This CL also updates GCInvoker to not trigger an incremental GC if we
won't be able to finalize it. That makes finalizing through an
non-nested incremental task safe.
Bug: chromium:1056170
Change-Id: I85f0c9f2efe643cb87dd65d80417eea0d6ee5d52
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414217
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69971}
For "else" and "catch" statements, the Ref to the end label should only
be added if the current block is unreachable, not the parent block.
In the added regression test, the "true" block ends in an unreachable
state with a stack height less than the target height of the end label.
This is valid due to the semantics of unreachable code, but we should
not add the Ref in this case because its stack height is invalid.
R=clemensb@chromium.org
Fixed: chromium:1092130
Change-Id: Iebaf5e7d6516278ccd3c8268ac331069e109d882
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2412181
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69934}
... by unparking the local heap before accessing the handles.
Bug: v8:7790
Change-Id: I0910fd8ad2a1e9cbbf312acb4f26358a09891f0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2404455
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69852}
This is a reland of f25cb50a2f
Removed the problematic tests.
The problem with the test was that we try to pop from an empty segment.
GCC flags that as accessing beyond the array (i.e. index is uint16_t
equivalent of -1). Preceding the actual pop is a DCHECK that asserts
the segment isn't empty. In practice, since we have the DCHECK and
access to the segment is always via a Local, this shouldn't be a
problem.
Unfortunately, GCC flags the access regardless. The DCHECK goes through
a function pointer so GCC cannot determine that in our unittest the
DCHECK would crash if index is 0 and the access would not happen (The
indirection was added to allow for test DCHECK handlers that don't
crash, so we can't mark the function pointer as noreturn).
Drive-by: Segment::Pop and Segment::Push rely on the their Local
counterparts checking of emptiness/fullness, so we should always
access segments via Locals. Making the Segment ctor private.
Original change's description:
> Reland "cppgc, heap: Don't eagerly allocate worklist segments"
>
> This is a reland of c99147c65e
>
> Original change's description:
> > cppgc, heap: Don't eagerly allocate worklist segments
> >
> > Bug: chromium:1056170
> > Change-Id: I75a6b5f52bfe8dd71abc086e5d1e060759ad7fc0
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2391254
> > Commit-Queue: Omer Katz <omerkatz@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#69778}
>
> Bug: chromium:1056170
> Change-Id: I4633da065976a6b2710d2f23b946fd2af0e65c83
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2401425
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69806}
Bug: chromium:1056170
Change-Id: I7a122d1a2d20cd4e7c824d249975b4d3df30e03e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2403251
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69829}
Apple's upcoming arm64 devices will prevent rwx access to memory,
but in turn provide a new per-thread way to switch between write
and execute permissions. This patch puts that system to use for
the WebAssembly subsystem.
The approach relies on CodeSpaceWriteScope objects for now. That
isn't optimal for background threads (which could stay in "write"
mode permanently instead of toggling), but its simplicity makes
it a good first step.
Background:
https://developer.apple.com/documentation/apple_silicon/porting_just-in-time_compilers_to_apple_silicon
Bug: chromium:1117591
Change-Id: I3b60f0efd34c0fed924dfc71ee2c7805801c5d42
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2378307
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69791}
This CL migrates cppgc to use Ulan's new worklist implementation.
Since there is no central segments array anymore, we cannot rely on
getting the same view (now renamed to Local) given the same task id.
To avoid creating many short lived segments (e.g. for write barriers)
marking state now holds local views for all worklists and provides
access to them.
Bug: chromium:1056170
Change-Id: Id19fe1196b79ed251810e91074046998dc2a9177
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2390771
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69767}
- JobHandle::IsCompleted()
- JobDelegate::GetTaskId()
- worker_count passed as argument to GetMaxConcurrency().
Jobs implementation must call the new GetMaxConcurrency(), but Jobs
users aren't migrated yet.
Bug: chromium:1114823
Change-Id: Ie09a8847d1cb884b1e388903370e49f33fa25a64
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2374308
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69683}
The handle was always created empty which resulted in a DCHECK crash
in debug builds and in never-cancelled tasks in release builds.
Bug: chromium:1056170
Change-Id: I798ce65c37738bbe9c60b44b692ff04536f6d830
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2388101
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69653}
Heap growing estimates when to start incremental gc such that it
will finish when we are expecting to finalize (i.e. when an atomic
gc would be triggered).
There is also a minimum ratio between limit for atomic gc and limit
for incremental gc, to guarantee that incremental gc get's some time to
run even with the application rarely allocates.
This is a continuation of:
https://chromium-review.googlesource.com/c/v8/v8/+/2377691
Bug: chromium:1056170
Change-Id: I8c87e98d60b6f8b5748558771a236f15385f7858
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2381454
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69630}
With conservative stack scanning enabled, a snapshot of the call stack
upon entry to GC will be used to determine part of the root-set. When
the collector walks the stack, it looks at each value and determines
whether it could be a potential on-heap object pointer. However, unlike
with Handles, these on-stack pointers aren't guaranteed to point to the
start of the object: the compiler may decide hide these pointers, and
create interior pointers in C++ frames which the GC doesn't know about.
The solution to this is to include an object start bitmap in the header
of each page. Each bit in the bitmap represents a word in the page
payload which is set when an object is allocated. This means that when
the collector finds an arbitrary potential pointer into the page, it can
walk backwards through the bitmap until it finds the relevant object's
base pointer. To prevent the bitmap becoming stale after compaction, it
is rebuilt during object sweeping.
This is experimental, and currently only works with inline allocation
disabled, and single generational collection.
Bug: v8:10614
Change-Id: I28ebd9562f58f335f8b3c2d1189cdf39feaa1f52
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2375195
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69615}
This is the first step in a series of CLs. The goal is to make
super property access faster.
Design doc: https://docs.google.com/document/d/1b_wgtExmJDLb8206jpJol-g4vJAxPs1XjEx95hwRboI/edit?usp=sharing
This CL:
- Add bytecode LdaNamedPropertyFromSuper
- IGNITION_HANDLER just calls Runtime::LoadFromSuper
- JSGenericLowering::LowerJSLoadNamedFromSuper just replaces the node
with a runtime call to Runtime::LoadFromSuper
Bug: v8:9237
Change-Id: Id28e935294c5068dd6c54e6b860a77d61517fff5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2327912
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69604}
Explicit nullification aims to simplify migration to Oilpan, in the
case when unique_ptrs are converted to Member and user code relies on
source pointers to be in "empty" state.
Change-Id: Ia54137d53ca03f93932b3c1f2eaba439a416a06e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2379857
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69603}
Schedule is simpler compared to the schedule in blink since it now
returns deadlines based on marked bytes instead of time.
If marking is ahead of schedule, return the minimum step size.
Otherwise, set step size to catch up to schedule (ignoring the time
passed while performing the step).
No more default initial step size (needed in blink since marking speed
was unknown).
If estimated schedule is exceeded (marking takes longer than 500ms), the
steps will try to mark all remaining objects but would still be capped
by the maximum step duration of 2ms.
Bug: chromium:1056170
Change-Id: I09857db161c621a12d064f9c8c21b646c34f9d71
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2375200
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69602}
Starting marking required Creating a Marker and calling StartMarking.
StartMarking should always have been called immediately after creating
the marker.
Since markers are not persisted between GC (a marker exists only while
marking is in progress), it makes sense to start marking implicitly when
a marker is created.
Calling StartMarking in MarkerBase ctor is inadvisable since subclasses
might still to initialize fields.
Using MarkerFactory instead guarantees that StartMarking is always
called immediately after creating a Marker.
Bug: chromium:1056170
Change-Id: Icbf11afd848e1618c204ca6bf951600b3ae9fef2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2375199
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69601}
- JobHandle::IsCompleted()
- JobDelegate::GetTaskId()
- worker_count passed as argument to GetMaxConcurrency().
Jobs implementation must call the new GetMaxConcurrency(), but Jobs
users aren't migrated yet.
Bug: chromium:1114823
Change-Id: I0f4295ccaf9eba866dd771f30e2e49aa3eae9551
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2352484
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69553}
This CL adds a bytes based deadline to draining of worklist.
The time based deadline is also kept because:
1) Unified heap can't transition to bytes-based deadlines yet.
2) Unified heap with concurrent marking needs to flush v8 references
which don't count as marked_bytes and can cause very long incremental
pauses.
Bug: chromium:1056170
Change-Id: I5ab57754e7ff0b5821f3acb76e1e6f59fc9d68b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2299374
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69506}
This CL adds a basic implementation of incremental marking for standalone GC.
Followup CLs include:
* Use bytes instead of time as deadline
* Port incremental marking schedule from blink
* Mark on allocation
* Guarantees for progres/termination for standalone GC
* etc...
Calling StartIncrementalGarbageCollection triggers StartMarking which
schedules incremental marking as non-nestable tasks.
For unified heap, marking will continue running until it runs out of
work but it won't finalize independently.
For standalone, when incremental runs out of work it will schedule a new
task in which it will finalize marking and trigger the rest of the GC.
Users of standalone can also force finalization before incremental
marking as finished using FinalizeIncrementalGarbageCollectionIfRunning.
Calling CollectGarbage would also finalize an on-going incremental GC
if one exists. Otherwise it will trigger an atomic GC.
See the following doc for explanation of the various methods:
https://docs.google.com/document/d/1ZhJY2fOoD8sH53ZxMh2927Zl8sXqA7azJgcQTWx-YKs/edit?usp=sharing
Bug: chromium:1056170
Change-Id: I75ead414eb9da9f8b7f71c4638b9830fce7708ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2298009
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69480}
There exists such optimization for additions but not for multiplication.
This adds optimizations that apply the reductions
(x * Int32Constant(a)) * Int32Constant(b)) => x * Int32Constant(a * b)
(x * Int64Constant(a)) * Int64Constant(b)) => x * Int64Constant(a * b)
to the TurboFan graph.
Bug: v8:10305
Change-Id: I28f72c2b7d8ff0f758a0a08b69fb3763557a6241
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2360327
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69462}
Allow AllocationObserver::Step to remove allocation observers as well.
They could already add new observers (to start incremental marking),
removing will be used when starting StressConcurrentAllocator from
an allocation observer.
Bug: v8:10315
Change-Id: I823ded2f9a408b3fa5269ee8416060d0cabb3162
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2357690
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69420}
This patch introduces a new LocalIsolate and LocalFactory, which use
LocalHeap and replace OffThreadIsolate and OffThreadFactory. This allows
us to remove those classes, as well as the related OffThreadSpace,
OffThreadLargeObjectSpace, OffThreadHeap, and OffThreadTransferHandle.
OffThreadLogger becomes LocalLogger.
LocalHeap behaves more like Heap than OffThreadHeap did, so this allows
us to additionally remove the concept of "Finish" and "Publish" that the
OffThreadIsolate had, and allows us to internalize strings directly with
the newly-concurrent string table (where the implementation can now move
to FactoryBase).
This patch also removes the off-thread support from the deserializer
entirely, as well as removing the LocalIsolateWrapper which allowed
run-time distinction between Isolate and OffThreadIsolate. LocalHeap
doesn't support the reservation model used by the deserializer, and we
will likely move the deserializer to use LocalIsolate unconditionally
once we figure out the details of how to do this.
Bug: chromium:1011762
Change-Id: I1a1a0a72952b19a8a4c167c11a863c153a1252fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2315990
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69397}
This fixes a case where we hit a DCHECK in Debug mode, or silently
discarded bogus data in Release mode without rejecting the module.
Fixed: chromium:1108815
Change-Id: I928ff244a54b016cd8470be1ec4b5faf2c7e3994
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2349768
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69391}
Since it will be patched in later in the cases where it will be used,
there is no need to have it as a parameter.
Bug: v8:7790
Change-Id: I93b27f3baf8c3841a60f5ac5ed09993d1caf19bc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2351667
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69366}
Move external memory counters out of IsolateData back into Heap.
The class ExternalMemoryAccounting now stores all counters and is
responsible for updates. This change will allow turning counters into
atomic variables.
Bug: v8:10315
Change-Id: I2abeda298d3cfcc630fd04ca78a3d6d703e3b419
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2346647
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69356}
This is the first step in refactoring Worklist to allow arbitrary
number of local worklists with private segments:
- Introduce MarkingWorklistImpl<> which will eventually replace
(and will be renamed to) Worklist.
- MarkingWorklistImpl<> owns the global pool of segments but does not
keep track of private segments.
- MarkingWorklistImpl<>::Local owns private segments and can be
constructed dynamically on background threads.
- Rename the existing MarkingWorklistsHolder to MarkingWorklists.
- Rename the existing MarkingWorklists to MarkingWorklists::Local.
- Rename the existing marking_workists_holder to marking_worklists.
- Rename the existing marking_worklists to local_marking_worklists.
Design doc: https://bit.ly/2XMtjLi
Bug: v8:10315
Change-Id: I9da34883ad34f4572fccd40c51e51eaf50c617bc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2343330
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69330}
With a displacement of int32_t min (-2^31), and a displacement mode of
kNegativeDisplacement, we will try to negate this constant, but the
result will not fit in an int32_t, leading to a runtime crash.
Check for this special case in CanBeImmediate, and return false.
Bug: chromium:1091892
Change-Id: I7f18153d13805f2836dd5c8e1bc098f1e9600566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2341095
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69311}
Changes the isolate's string table into an off-heap structure. This
allows the string table to be resized without allocating on the V8 heap,
and potentially triggering a GC. This allows existing strings to be
inserted into the string table without requiring allocation.
This has two important benefits:
1) It allows the deserializer to insert strings directly into the
string table, rather than having to defer string insertion until
deserialization completes.
2) It simplifies the concurrent string table lookup to allow resizing
the table inside the write lock, therefore eliminating the race
where two concurrent lookups could both resize the table.
The off-heap string table has the following properties:
1) The general hashmap behaviour matches the HashTable, i.e. open
addressing, power-of-two sized, quadratic probing. This could, of
course, now be changed.
2) The empty and deleted sentinels are changed to Smi 0 and 1,
respectively, to make those comparisons a bit cheaper and not
require roots access.
3) When the HashTable is resized, the old elements array is kept
alive in a linked list of previous arrays, so that concurrent
lookups don't lose the data they're accessing. This linked list
is cleared by the GC, as then we know that all threads are in
a safepoint.
4) The GC treats the hash table entries as weak roots, and only walks
them for non-live reference clearing and for evacuation.
5) Since there is no longer a FixedArray to serialize for the startup
snapshot, there is now a custom serialization of the string table,
and the string table root is considered unserializable during weak
root iteration. As a bonus, the custom serialization is more
efficient, as it skips non-string entries.
As a drive-by, rename LookupStringExists_NoAllocate to
TryStringToIndexOrLookupExisting, to make it clearer that it returns
a non-string for the case when the string is an array index. As another
drive-by, extract StringSet into a separate header.
Bug: v8:10729
Change-Id: I9c990fb2d74d1fe222920408670974a70e969bca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2339104
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69270}
This is a revival of https://chromium-review.googlesource.com/c/v8/v8/+/2228332
The CL establishes the following:
*) Objects are marked before being pushed to the worklists.
*) Live bytes are always accounted after tracing an object (i.e. move
from Gray to Black below).
*) Previously not fully constructed objects are traced immediately
instead of pushed to the marking worklist.
This establishes the following invariants for all marking worklists:
1) White = !object.is_marked() && !worklist.contains(object)
2) Gray = object.is_marked() && worklist.contains(object)
3) Black = object.is_marked() && !worklist.contains(object)
Bug: chromium:1056170
Change-Id: I821573b3fbc057e6ffb836154271ff986ecb4d2b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2336797
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69268}
Changes:
- Remove restriction that function types cannot be used as ref types.
- Introduce WasmModule::has_type().
- Remove deferred signature checks in module-decoder. Instead, check if
type indices are out of bounds in consume_value_type (was bugged
before).
- Remove obsolete GetCanonicalRttIndex.
- Refine type of ref.func.
- Statically check immediate type against table type for call_indirect.
- Dynamic check for call_indirect should only happen when for funcref
(currently the only function supertype).
- Allocate a different map per function signature (with Map::Copy).
- Introduce function type equivalence and (trivial) subtyping.
- Add a few elementary tests.
Bug: v8:7748
Change-Id: If57d0bfd856c9eb3784191f3de423f53dfd26ef1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2335190
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69250}
With the new Turbofan variants (NCI and Turboprop), we need a way to
distinguish between them both during and after compilation. We
initially introduced CompilationTarget to track the variant during
compilation, but decided to reuse the code kind as the canonical spot to
store this information instead.
Why? Because it is an established mechanism, already available in most
of the necessary spots (inside the pipeline, on Code objects, in
profiling traces).
This CL removes CompilationTarget and adds a new
NATIVE_CONTEXT_INDEPENDENT kind, plus helper functions to determine
various things about a given code kind (e.g.: does this code kind
deopt?).
As a (very large) drive-by, refactor both Code::Kind and
AbstractCode::Kind into a new CodeKind enum class.
Bug: v8:8888
Change-Id: Ie858b9a53311b0731630be35cf5cd108dee95b39
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2336793
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69244}
DetachPersistent() sets up PersistentHandles, but didn't properly set
up ordered_blocks_. So PersistentHandles::Contains failed for handles
that were detached from the main thread into PersistentHandles.
Bug: v8:10315
Change-Id: I5374ad64743cd519a9c5e92900c1fa401c4d93ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2336801
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69243}
Swizzles are shuffles that only use values from 1 operand, e.g.
v8x16.shuffle 0 1 2 3 0 0 0 0 4 5 6 7 0 0 0 0 (all the values are < 16).
Match such patterns and emit an optimized codegen that uses less
registers and instructions. Only implemented for x64 for now, the other
backends will come in follow-up patches.
Bug: v8:10696
Change-Id: Iffa694b04c97313eab7d138e4bdad7c0c85cda89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2335419
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69231}
Test now passes even if RO_SPACE sharing is enabled.
Bug: v8:10454
Change-Id: Ic7377c3367199383bb6a96a9beedcc52bbc3362f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2335184
Commit-Queue: Dan Elphick <delphick@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69221}
This is a reland of b354e344fd
This CL adds 3 fixes:
* Unprotect code object before creating filler
* Allows AllocationObserver::Step to add more AllocationObservers
* Update limit in NewSpace::UpdateLinearAllocationArea
Original change's description:
> [heap] Refactor allocation observer in AllocationCounter
>
> Moves accounting of allocation observers into the AllocationCounter
> class. This CL removes top_on_previous_step_ for counters that are
> increased regularly in the slow path of the allocation functions.
>
> AdvanceAllocationObservers() informs the AllocationCounter about
> allocated bytes, InvokeAllocationObservers() needs to be invoked when
> an allocation step is reached. NextBytes() returns the number of bytes
> until the next AllocationObserver::Step needs to run.
>
> Bug: v8:10315
> Change-Id: I8b6eb8719ab032d44ee0614d2a0f2645bfce9df6
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2320650
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69170}
Bug: v8:10315
Change-Id: I89ab4d5069a234a293471f613dab16b47d8fff89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2332805
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69216}
This reverts commit b354e344fd.
Reason for revert: Clusterfuzz found issues with this CL.
Original change's description:
> [heap] Refactor allocation observer in AllocationCounter
>
> Moves accounting of allocation observers into the AllocationCounter
> class. This CL removes top_on_previous_step_ for counters that are
> increased regularly in the slow path of the allocation functions.
>
> AdvanceAllocationObservers() informs the AllocationCounter about
> allocated bytes, InvokeAllocationObservers() needs to be invoked when
> an allocation step is reached. NextBytes() returns the number of bytes
> until the next AllocationObserver::Step needs to run.
>
> Bug: v8:10315
> Change-Id: I8b6eb8719ab032d44ee0614d2a0f2645bfce9df6
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2320650
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69170}
TBR=ulan@chromium.org,dinfuehr@chromium.org
Change-Id: Icd713207bfb2085421fd82009be24a0211ae86da
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10315
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2332667
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69187}
Also add some simple unittests for these functions.
Bug: v8:10696
Change-Id: Ic7607780b4eaf275b20d0937bf214846bf51d539
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2330806
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69183}
This allows templates to preserve the type of implicit parameters to
select a better ovleroad, without generally extending overload
resolution to implicit parameters, which could be confusing.
Bug: v8:7793
Change-Id: Ie57090a295b0b46d03789829b975fc16e2a9c5b9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2329630
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#69177}
Moves accounting of allocation observers into the AllocationCounter
class. This CL removes top_on_previous_step_ for counters that are
increased regularly in the slow path of the allocation functions.
AdvanceAllocationObservers() informs the AllocationCounter about
allocated bytes, InvokeAllocationObservers() needs to be invoked when
an allocation step is reached. NextBytes() returns the number of bytes
until the next AllocationObserver::Step needs to run.
Bug: v8:10315
Change-Id: I8b6eb8719ab032d44ee0614d2a0f2645bfce9df6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2320650
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69170}
This is a reland of 13141c8a65
... with a fix for an UB issue of passing null pointers to memcpy()
when size is zero.
TBR=leszeks@chromium.org
Original change's description:
> [zone-compr] Introduce ZoneTypeTraits and ZoneCompression
>
> Also move zone compression flags to src/common/globals.h.
>
> Bug: v8:9923
> Change-Id: Id0a77720e735e2669a1e5eef48e1b4866ad99480
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2324255
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69160}
Bug: v8:9923
Change-Id: I2245b81516c39ccea262c282c659ef601af57abf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2332165
Commit-Queue: Igor Sheludko (OOO Aug 3-17) <ishell@chromium.org>
Reviewed-by: Igor Sheludko (OOO Aug 3-17) <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69166}
If an enum case has a type annotation, the corresponding enum constant
has this type. This is useful for typing context slots.
Bug: v8:7793
Change-Id: I8b91c3bd3686048f98cce3c034eec4e36f925e5b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2329631
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69165}
Excluded regions are no longer available to the RegionAllocator, so
should not be freeable so actually enforce that and aAdd a test.
Bug: v8:10454
Change-Id: I51c41cf0bf3d2eeb699b10b1fa02f5465d93b6aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2330026
Reviewed-by: Igor Sheludko (OOO Aug 3-17) <ishell@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69163}
These are no longer tied to instruction-selector, so move them out into
their own unittests. We can then remove the *ForTesting methods.
Bug: v8:10696
Change-Id: I387cf38290d9602b011ee1d13ee5285ac660f208
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2326951
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69149}
Adds unittests that test the fast register allocator correctly deals
with spills of Phi's between their definition and a predecessor block's
gap move to populate the Phi.
BUG=v8:9684
Change-Id: I17263058d5ac29088895ad3de7b3131315ec8fae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2299371
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69141}
Adds support for Phis to be allocated to the fast register
allocator. Registers used for Phis are marked specially between
the point where the Phi is defined, and the gap-move's in the
predecessor blocks which populate the Phi value, since if the
Phi is spilled then all predecessor blocks must also spill the
Phi even if they were already allocated.
BUG=v8:9684
Change-Id: Iebe90495b83df655d3335a7d55874123f3b27f8d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2299366
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69139}
PersistentHandlesScope works similar to the DeferredHandleScope, but
returns PersistentHandles instead of DeferredHandles on Detach().
Since PersistentHandlesScope takes over filled blocks from the
main thread local handle, remove the block_size_ field and use
kHandleBlockSize instead. This way all blocks have exactly the same size.
Bug: v8:10315
Change-Id: I295cad6f84852f87c55d95572905069443f5698c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2324254
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69138}
Adds support for populating reference maps to the fast
register allocator. In order to calculate whether a stack slot
is live at a given instruction, we use the dominator tree to
build a bitmap of blocks which are dominated by each block.
A variable's spill operand is classed as alive for any blocks that are
dominated by the block it was defined in, until the instruction index
of the spill operand's last use. As such, it may be classified as live
down a branch where the spill operand is never used, however it is safe
since the spill slot won't be re-allocated until after it's last-use
instruction index in any case.
BUG=v8:9684
Change-Id: I772374599ef916f57d82d468f66429e32c712ddf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2298008
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69108}
Adds support for tracking the instruction range of spilled operands,
and then allocating spill slots to these ranges. It also adds some
unittests covering spill slot allocation.
Spill slots are allocated in a linear fashion, running through the
instruction stream in a linear order, ensuring that no spill operand
is allocated to a same spill slot that is already assigned to during
this whole start / end range. This isn’t optimal, since it doesn’t
take into account holes in these ranges (e.g, blocks between start
and end that aren’t dominated by the start), but in practice rarely
leads to more than one extra spill slot being allocated compared to
the current allocator.
BUG=v8:9684
Change-Id: Iedee7bcf552080e5b4b6a2f4e96b78b6c1396cab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2297470
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69107}
Using uint8_t[] causes decay to pointer issue, which manifests in
copying garbage values in the call to WriteLittleEndianValue. Change it
to use a std::array, which doesn't have the decaying behavior.
Also add a regression test from comment#6 of the linked bug.
Bug: v8:10731
Change-Id: I4a1ca69fe99806642e9931625ca7aeab6663f955
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2316465
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69052}
Adds support for register allocation within a block to the fast
register allocator. Also adds some unittests covering basic
register allocation. No support yet for spill slot allocation,
so functions that spill don't work yet.
BUG=v8:9684
Change-Id: I91d0fc0660d7b65f59235242fd5e3b1a7618d813
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2297467
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69045}
... that controls whether the TF graph zones should support compression.
Bug: v8:9923
Change-Id: Ifbe237b75e9c92e62eb32b69d6b3b1a818269b83
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2308347
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69036}
The following adds support for JSMember through the existing
GlobalHandles implementation also used for TracedReference.
In addition, JSMember now supports set, clear, copy, move, comparison
and interaction with Local.
Bug: chromium:1056170
Change-Id: Ia50218bcfe4c056b3533a5b14eea954ade1da243
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2310357
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69028}
Design doc:
https://docs.google.com/document/d/1szInbXZfaErWW70d30hJsOLL0Es-l5_g8d2rXm1ZBqI/edit?usp=sharing
V8 can already collect data about how many times each basic block in the
builtins is run. This change enables using that data for profile-guided
optimization. New comments in BUILD.gn describe how to use this feature.
A few implementation details worth mentioning, which aren't covered in
the design doc:
- BasicBlockProfilerData currently contains an array of RPO numbers.
However, this array is always just [0, 1, 2, 3, ...], so this change
removes that array. A new DCHECK in BasicBlockInstrumentor::Instrument
ensures that the removal is valid.
- RPO numbers, while useful for printing data that matches with the
stringified schedule, are not useful for matching profiling data with
blocks that haven't been scheduled yet. This change adds a new array
of block IDs in BasicBlockProfilerData, so that block counters can be
used for PGO.
- Basic block counters need to be written to a file so that they can be
provided to a subsequent run of mksnapshot, but the design doc doesn't
specify the transfer format or what file is used. In this change, I
propose using the existing v8.log file for that purpose. Block count
records look like this:
block,TestLessThanHandler,37,29405
This line indicates that block ID 37 in TestLessThanHandler was run
29405 times. If multiple lines refer to the same block, the reader
adds them all together. I like this format because it's easy to use:
- V8 already has robust logic for creating the log file, naming it to
avoid conflicts in multi-process situations, etc.
- Line order doesn't matter, and interleaved writes from various
logging sources are fine, given that V8 writes each line atomically.
- Combining multiple sources of profiling data is as simple as
concatenating their v8.log files together.
- It is a good idea to avoid making any changes based on profiling data
if the function being compiled doesn't match the one that was
profiled, since it is common to use profiling data downloaded from a
central lab which is updated only periodically. To check whether a
function matches, I propose using a hash of the Graph state right
before scheduling. This might be stricter than necessary, as some
changes to the function might be small enough that the profile data is
still relevant, but I'd rather err on the side of not making incorrect
changes. This hash is also written to the v8.log file, in a line that
looks like this:
builtin_hash,LdaZeroHandler,3387822046
Bug: v8:10470
Change-Id: I429e5ce5efa94e01e7489deb3996012cf860cf13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2220765
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69008}
v128.const (kExprS128) is the only constant expression supported
(similar to the other value types).
Bug: v8:10731
Change-Id: I9b11b47a851903dfd79d3590eff67b615057f81c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2308389
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68975}
V8 already depends on cppgc_base which means that unittests does not
need to depend on cppgc_for_testing any longer.
Move the cppgc_for_testing dependency to the stand-alone
cppgc_unittests binary
Bug: v8:10674
Change-Id: I07bfe30901eb1683d2e0ee0189f73b5244884f27
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2310249
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68970}
They have been replaced with {array,struct}.new_with_rtt.
Also, rework tests that used those instructions.
Bug: v8:7748
Change-Id: I2aaccb1958bf2b8d6cad4969abc612216856393d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2307318
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68961}
... by migrating old-style code
MyObject* obj = new (zone) MyObject(...)
to the new style
MyObject* obj = zone->New<MyObject>(...)
... and prohibiting accidental use of the old-style.
Bug: v8:10689
Change-Id: Id75774ac12e3d0f95cb3a538066dffbf7815e438
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2300490
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68905}
This CL ports MarkingVerifier from blink.
The existing verifier checks only references on heap.
This new verifier checks references both on heap and on stack.
Bug: chromium:1056170
Change-Id: I083dcb0087125312cca34a2201015a9aecfe6ea4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2300484
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68891}
Adds basic framework to pipeline.cc to enable a seperate fast register
allocator for the TurboProp mid-tier. As part of this, common logic as
well as a base class for RegisterAllocationData is moved to a seperate
register-allocation.h header file. The current register allocator's
RegisterAllocationData is renamed to TopTierRegisterAllocationData, and
the former name is the new base class held in PipelineData.
BUG=v8:9684
Change-Id: I28285b7d6112505bf90e88ea3cda66d03dfabc74
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2295359
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68852}
This CL adds functionality to read the source positions directly
from the JS heap rather than from serialized data.
In order to do this, we create a PersistentHandles container in the
OptimizedCompilationInfo which gets passed onto the JSHeapBroker. This
allows us to create the handles in the main thread and pass them safely
to the background thread.
In order to read safely from the background thread, we need a LocalHeap
which blocks the GC from running and potentially moving the handles.
This LocalHeap is created only when the JSHeapBroker has finalized
serializing and destroyed when retiring it.
Bug: v8:7790
Change-Id: I19f8b08d12e5be0a3df34d6af2043310c0c7b6fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2277802
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68836}
This is a reland of d6a14abe05
Test wasn't written with incremental/concurrent marking in mind, so
simply disabling it for this particular unittest.
Original change's description:
> [heap] Move start of incremental marking in allocation
>
> Move start of incremental marking out of
> RefillLinearAllocationAreaFromFreeList. This avoids a potential
> safepoint while holding allocation_mutex_.
>
> Bug: v8:10315
> Change-Id: Ieb60ac68f26199eea7b6b7ad6d874851382f3d69
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2287496
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68751}
Bug: v8:10315
Change-Id: I2a665400d9a784b1557474a051839d5c8b45e9e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2292241
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68818}
... by migrating old-style code
MyObject* obj = new (zone) MyObject(...)
to the new style
MyObject* obj = zone->New<MyObject>(...)
Bug: v8:10689
Change-Id: I55c686bbedfa1fd1955a5927df3f72b366312fd4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2288867
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68808}
... by migrating old-style code
MyObject* obj = new (zone) MyObject(...)
to the new style
MyObject* obj = zone->New<MyObject>(...)
Bug: v8:10689
Change-Id: I2fc4a44ea05e4d087565811f343893f0e97dc660
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2288857
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68789}
This CL removes the GetTraceDescriptor virtual call from garbage
collected mixins and replaces it with querying the object start
bitmap.
The CL also removes the mixin macros which are now no longer needed.
Bug: chromium:1056170
Change-Id: I27ed299f93025d09a3bb3f0d17b14bed3c200565
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2287508
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68787}
... by migrating old-style code
MyObject* obj = new (zone) MyObject(...)
to the new style
MyObject* obj = zone->New<MyObject>(...)
Bug: v8:10689
Change-Id: Ic7d893b8d6772bd923c37c3d1e7cff5cc6667192
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2288868
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68786}
This is a reland of bebb2bdc06
Original change's description:
> [heap] Allow LocalHeap on the main thread
>
> This changes the safepoint scope to skip LocalHeap that is active
> for the current thread to avoid deadlocking.
>
> Bug: v8:10315
> Change-Id: I45e80ae66d0dbbe768107aa9cf0603204c644d9f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2289983
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68769}
Bug: v8:10315
Tbr: dinfuehr@chromium.org
Change-Id: I1974d8b6ffffbf3244e7ede2d20d9b2d623df150
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2290851
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68785}
This reverts commit bebb2bdc06.
Reason for revert: Breaks GarbageCollectionWithLocalHeap test.
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20debug/31107
Original change's description:
> [heap] Allow LocalHeap on the main thread
>
> This changes the safepoint scope to skip LocalHeap that is active
> for the current thread to avoid deadlocking.
>
> Bug: v8:10315
> Change-Id: I45e80ae66d0dbbe768107aa9cf0603204c644d9f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2289983
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68769}
TBR=ulan@chromium.org,dinfuehr@chromium.org
Change-Id: Ifba8218f9104afed3f2d92258296067f8f424062
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10315
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2290573
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68770}
This changes the safepoint scope to skip LocalHeap that is active
for the current thread to avoid deadlocking.
Bug: v8:10315
Change-Id: I45e80ae66d0dbbe768107aa9cf0603204c644d9f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2289983
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68769}
Motivation: With rtt.sub now allowed in constant expressions, we have
to generalize WasmInitExpr to be able to handle expressions with
operands. This is the second CL that prepares the ground for this
change.
Changes:
- Remove the error from read-value-type when reading a generic rtt.
- Add validation for HeapTypeImmediate in ModuleDecoder. Use it to
validate null constants immediates, which was missing. Add tests.
- Change ValueType::name to print rtt depths as integers.
- Move global initializer building in wasm-module-builder to its own
function.
Bug: v8:7748
Change-Id: Ic041e1c7d032f2a1063a21fec1bfe96cb0d8120e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2284983
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68767}
Motivation: With rtt.sub now allowed in constant expressions, we have
to generalize WasmInitExpr to be able to handle expressions with
operands. This CL prepares the ground for this change and adds no
functionality.
Changes:
- ValueType::heap_representation and HeapType::representation now
return HeapType::Representation.
- Add ValueType::is_rtt().
- WasmInitExpr:
- Make kind private. Rename val -> operator, make it private. Add
accessors.
- Rename kGlobalIndex -> kGlobalGet.
- Squash global_index and function_index into index.
- Add heap_type Immediate. Use it for RefNullConst. TypeOf in
module-decoder.cc can now fully determine the type of a
WasmInitExpr.
- Add class constructors/static method constructors for each Operator
kind.
- Delete copy constructor. WasmInitExpr will use std::unique_ptr for
its operands.
- consume_init_expr now uses a stack.
- A few minor improvements.
Bug: v8:7748
Change-Id: I3ba3ee7ac2d6bc58e887790c37110ceb80658985
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2284483
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68759}
This is needed for write-barrier and persistent-handle code that does
not otherwise get an instance of LocalHeap
Bug: v8:10315
Change-Id: I480e31f32141510f2f9e678af3449d5841e3156e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2284492
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68720}
- Adds JSVisitor that is used for unified heap marking.
- Adds JSMember as supported reference type that also encapsulates a
write barrier in future. JSMember is a replacement for
TracedReference which can be deprecated with EmbedderHeapTracer once
the library is used to handle unified heap collections.
The dispatch for v8::JSMember on cppgc::Visitor is provided through a
specialization of TraceTrait.
Bug: chromium:1056170
Change-Id: I60d976ae66db3e5fa2e690a21627bdcb8c6871af
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2284488
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68716}
In many cases, this simply requires early returning from tests which
rely on scavenger.
Bug: v8:10614
Change-Id: I5fc93b1cbc807b73bfbb113d087952e347001ddd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270548
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Jake Hughes <jakehughes@google.com>
Cr-Commit-Position: refs/heads/master@{#68702}
This will allow it to take an OffThreadIsolate in the future, without
requiring GetIsolate on SharedFunctionInfo.
Change-Id: I7db56d5f0587585f829b26e60683c133760d8ff1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2282534
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68696}
This is the last batch of operators which used to embed the feedback
vector as a HeapConstant:
- CreateEmptyLiteralArray
- LoadGlobal
- LoadNamed
- StoreDataPropertyInLiteral
- StoreGlobal
- StoreInArrayLiteral
- StoreNamed
- StoreNamedOwn
They now take the vector as an input. In NCI mode, the vector is
loaded from the closure at the beginning of the function.
Bug: v8:8888
Change-Id: Ifd2d2a556db343512b61e099a73702822b1ba9f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2282525
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68695}
Prior to this CL, the construct node layout was:
{target, args..., new_target}
The new layout is:
{target, new_target, args..., feedback_vector}
Having new_target at index 1 brings it closer to call node layout,
which is now identical except that it has receiver at index 1. The new
feedback vector input will be needed for NCI code.
Affected node kinds are:
- JSConstruct
- JSConstructWithArrayLike
- JSConstructWithSpread
- JSConstructForwardVarargs (just the new_target position change)
Bug: v8:8888
Change-Id: I4c68a0901d01e8862fd276c8a858799d5f4ff024
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2278475
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68692}
Split off MarkingWorklists and from Marker and introduce MarkerBase.
MarkerBase refers just to interfaces types for passing along visitors.
The concrete Marker provides the impl for these interfaces. Unified
heap marker uses different marking visitors internally but provides an
implementation for the same interface.
Change-Id: Ibc4b2c88e2e69bd303a95da7d167a701934f4a07
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270539
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68676}
Split off MarkingState from MarkingVisitor.
With this CL the marking implementation is moved to "MarkingState"
which is the new bottleneck for marking a single object.
MarkingVisitor merely forwards to MarkingState, which knows how to set
the markbit and add the object to the worklist accordingly. This
allows to have a "UnifiedHeapMarkingVisitor" in future which can
easily reuse Marking to provide C++ marking.
Change-Id: I87ebbe37e8e8cd841e872cae9dc3490e2b55c4dd
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270172
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68660}
e.g. the following is now valid Torque code:
macro TestA(implicit c: Context)() {}
macro TestB(): bool {
return TestA();
}
This is handy for more flexible usage of generics that may or may not
use implicit parameters deep inside their specializations.
Note that this change doesn't change the fundamental rigor (or lack
thereof) around checking the usage of implicit parameters, which
already do not require '_' before their parameter identifier if
unused. It just silences errors in cases where a call site doesn't
implicitly pass a parameter that ultimately doesn't have a use site
and adds meaningful error messages in the case that it does.
Bug: v8:7793
Change-Id: I559d06c0864a7e79fe52bee5a9a7af9941889748
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274127
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68618}
This is likely the major change of the series, as Call nodes are the
focus of call reducer (and to a lesser extent other phases like
inlining).
This CL essentially adds the new input to Call nodes, and updates the
rest of the pipeline. As a (fairly large) drive-by, I also introduce
the JSCallNode wrapper class and apply it in call reducer.
This change, although large, will hopefully make future refactorings
*much* easier, since it is now clear where certain assumptions about
Call node layout are made.
Bug: v8:8888
Change-Id: Ia15fe0ba459b6034863a5815a4e4662cee41fc83
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264353
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68616}
Motivation:
The immediate-argument classes defined in function-body-decoder.h were
often adding an offset to the provided pc. This was inconsistent,
bug-prone, and counterintuitive. This CL imposes that all immediates
are passed as pc the start of the immediate argument they are parsing.
Some other smaller inconsistencies are fixed as well.
Changes:
src/wasm/:
- Enforce that all Immediates are passed the pc at the start of the
argument they are parsing. Adapt all call sites.
- Remove unneeded offset arguments from two SIMD related immediates.
- Add a pc argument to all Validate functions for immediates instead
of using the Decoder's current pc.
- Remove the (unused) pc argument from all Complete functions for
immediates.
- Introduce Validate() for BranchOnExceptionImmediate.
- In WasmDecoder::Decode(), make sure len is updated before breaking out
of the loop in case of a Validate() failure.
- Change the default prefix_len of DecodeLoadMem/DecodeStoreMem to 1.
wasm-interpreter.cc:
- Change the default prefix_len of ExecuteLoad/Store to 1.
- Adapt offsets in calls to Immediates.
- Remove redundant opcode_length argument from ExecuteSimdOp, use len
in its place.
function-body-decoder-unittest.cc
- Adapt offsets in calls to Immediates.
- Introduce and use EXPECT_OK, as is done in other tests.
Change-Id: I534606c0e238af309804d4a7c8cec75b1e49c6ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2267381
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68559}
Local type information was stored in the {WasmFullDecoder}, and a
pointer to that vector was handed to {WasmDecoder}. Since
{WasmFullDecoder} inherits from {WasmDecoder}, we can just move the
vector to the {WasmDecoder} class, and save an indirection and an
unnecessary nullptr check.
Drive-by: Rename {GetLocalType} to {local_type}, since it's a simple
accessor.
Drive-by 2: Move fields of {WasmDecoder} to the end of the class, as
mandated in the style guide.
Drive-by 3: Rename some locals in the 'let' decoding to make the meaning
more clear.
R=thibaudm@chromium.org
Bug: v8:10576
Change-Id: I6ab9831f0c1955e47562e84c5fbf15807439b024
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264360
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68541}
This allows the compiler to eliminate more unneeded branches. Since all
functions just do a lookup in a static table (either directly, or via
compiling a switch to such a lookup), they are also good candidates for
inlining, which is made possible by this change.
One DCHECK is removed instead of pulling in the inl header, which would
require more refactoring since the check is in a non-inl header.
R=thibaudm@chromium.orgTBR=jkummerow@chromium.org
Bug: v8:10576
Change-Id: If0fd25fd62c5f30b896fc67a5458a5ae475a6351
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2259944
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68508}
The IsInBounds function is used in a few different places, when used for
bounds checks on 32-bit platforms, size_t for max_memory_size leads to
incorrect out of bounds accesses as size_t is not guaranteed to be
64-bit on all platforms. Use specific uint32_t, uint64_t methods for
Wasm bounds checking instead of size_t.
Bug: chromium:1080902
Change-Id: I0e21f0a310382c8ed0703c8302200d3352495c13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2256858
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68500}
Due to recent spec changes, this CL removes the type immediate of
ref.is_null again. Instead we check if the type of the input parameter
is nullable.
R=jkummerow@chromium.org
Bug: v8:10556
Change-Id: If07d30fe4dd27664be7774422573b2ab2b0dfa20
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2247654
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68484}
The interpreter is not used in production code any more, hence move it
from src/wasm to test/common/wasm.
It's still used in unit tests, cctests, and in fuzzers.
Because of this move, a few more methods had to be exported via
V8_EXPORT_PRIVATE.
R=ahaas@chromium.org, yangguo@chromium.org
Bug: v8:10389
Change-Id: If626b940a721146c596fd7df4faaea633e710272
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2257226
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68480}
Following up on previous changes for unary ops:
https://crrev.com/c/2246576
Bug: v8:8888
Change-Id: Ie4dd9a307fb0415e93babf412e3d8d9e86791761
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2257227
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68479}
This change enables automatic generation of Cast<> operators for
classes that are defined in Torque.
* Cast<> macros are generated for all classes that are defined in
Torque code that are neither shapes nor marked with a new
@doNotGenerateCast annotation.
* Implicitly generated Cast macros simply call through to an
internally-defined "DownCastForTorqueClass" macro that implements
the cast using one of three strategies for efficiency. If the class
has subclasses (i.e. a range of instance types including subtypes),
the DownCastForTorqueClass checks for inclusion in the instance type
range. If the class has a single instance type (i.e. no subclasses),
then either 1) a map check is used if the class has a globally-
defined map constant or 2) an equality check for the instance type
is used.
* Added new intrinsics to introspect class information, e.g. fetching
instance type ranges for a class, accessing the globally-defined map
for a class.
* Removed a whole pile of existing explicit Cast<> operators that are
no longer needed because of the implicitly generated Cast<> macros.
* Added tests for the new Cast<> implementations.
Bug: v8:7793
Change-Id: I3aadb0c62b720e9de4e7978b9ec4f05075771b8b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2250239
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68478}
This extends the opcode macro lists to include both the long name
(e.g.: JSAdd) and short name (Add) to reduce duplication. The change
is only for JS operators for now but can be extended to others in the
future.
Drive-by: Base more predicates off the macro lists for robustness.
Bug: v8:8888
Change-Id: I10debdf86166dbe9dac63a6df57938820a8af8d0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2255468
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68477}
This changes black/white list to block/allow list.
Bug: v8:10619
Change-Id: Id55d72f90891670ca57b62dfeb6b3251025927dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2257228
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68464}
This allows the implementation of different stack scanning mechanisms in
V8 (e.g. conservative scanning) while re-using the stack walking API.
Change-Id: I9b9c3b8ffe5d527ca3f7105776821776b509b187
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2238194
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68457}
This is a reland of e0c1a349ea
The issue was passing SentinelPointer (== +1) through T*.
The fix is disabling cfi unrelated cast diagnostic for the bottlenecks
(Get()). This means that nullptr is treated the same as
kSentinelPointer.
The alternative would be a DCHECK that Get() does not return
kSentinelPointer and adjusting all Member and Persistent logic that
uses Get() to work on void*. This is quite intrusive as it involves
Swap(), heterogeneous assignments, comparisons, etc.
Original change's description:
> cppgc: Properly clear (Weak)Peristent and WeakMember pointers
>
> The CL addresses two issues with (Weak)Persistent and WeakMember:
> 1. (Weak)Persistent pointers are cleared on heap teardown. Before this
> CL the pointers would contain stale values which could lead to UAF.
> 2. WeakPersistent and WeakMember are cleared using a combination of
> internal clearing methods and mutable fields which avoids the use
> of const_cast<>.
>
> Bug: chromium:1056170
> Change-Id: Ibf2b0f0856771b4f6906608cde13a6d43ebf81f3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2248190
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68394}
Bug: chromium:1056170
Change-Id: I3d74b43464c2973df1956f51b1419d755dd9f519
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2250240
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68426}
This CL introduces one-letter shorthands to HeapTypes, and fixes
signatures to be in sync with the ValueType and HeapType shorthands.
Bug: v8:7748
Change-Id: I4cc8e26d6523074bc36bf2d29289e63a23e80ddc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2249672
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68425}
Motivation:
Changes to the typed function references and gc proposals solidified
the notion of heap type, clarified nullable vs. non-nullable reference
types, and introduced rtts, which contain an integer depth field in
addition to a heap type. This required us to overhaul our ValueType
representation, which results in extensive changes.
To keep this CL "small", we do not try to implement the binary encoding
as described in the proposals, but rather devise a simpler one of our
own (see below). Also, we do not try to implement additional
functionality for the new types.
Changes:
- Introduce HeapType. Move heap types from ValueType to HeapType.
- Introduce Nullability for reference types.
- Rework ValueType helper methods.
- Introduce rtts in ValueType with an integer depth field. Include depth
in the ValueType encoding.
- Make the constructor of ValueType private, instead expose static
functions which explicitly state what they create.
- Change every switch statement on ValueType::Kind. Sometimes, we need
nested switches.
- Introduce temporary constants in ValueTypeCode for nullable types,
use them for decoding.
- In WasmGlobalObject, split 'flags' into 'raw_type' and 'is_mutable'.
- Change IsSubtypeOfRef to IsSubtypeOfHeap and implement changes in
subtyping.
- kWasmFuncRef initializers are now non-nullable. Initializers are
only required to be subtypes of the declared global type.
- Change tests and fuzzers as needed.
Bug: v8:7748
Change-Id: If41f783bd4128443b07e94188cea7dd53ab0bfa5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2247657
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68408}
The CL addresses two issues with (Weak)Persistent and WeakMember:
1. (Weak)Persistent pointers are cleared on heap teardown. Before this
CL the pointers would contain stale values which could lead to UAF.
2. WeakPersistent and WeakMember are cleared using a combination of
internal clearing methods and mutable fields which avoids the use
of const_cast<>.
Bug: chromium:1056170
Change-Id: Ibf2b0f0856771b4f6906608cde13a6d43ebf81f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2248190
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68394}
Since ReadOnlySpace pages will soon not be MemoryChunks, change most
uses of MemoryChunk::FromHeapObject and FromAddress to use the
BasicMemoryChunk variants and which use the new MemoryChunk::cast
function that takes a BasicMemoryChunk and DCHECKs !InReadOnlySpace().
To enable this, it also moves into BasicMemoryChunk several MemoryChunk
functions that just require a BasicMemoryChunk.
Bug: v8:10454
Change-Id: I80875b2c2446937ac2c2bc9287d36e71cc050c38
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2243216
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68390}
This is a reland of 539f0ed23b
The reland fixes creating TimeDelta from double which requires
saturated_cast<>. Improvements to this constructions are tracked
in v8:10620.
Original change's description:
> cppgc,heap: Implement atomic unified heap GC
>
> Add v8::CppHeap as an implementation of a cppgc heap that
> integrates with V8's existing EmbedderHeapTracer API. The
> current implementation only supports non-incremental marking.
>
> Bug: chromium:1056170
> Change-Id: I4a09eb5ae57f5c7defe35eb3fe346627eb492473
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2245610
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68374}
Bug: chromium:1056170,v8:10620
Change-Id: I39e15790e5cafe24da2a14d0bae6543391ebb536
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2248191
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68387}
This adds the following things:
- age table for 4K regions;
- generational barrier for mixed 4K regions;
- unmarking for major collections;
- young generation flags.
Bug: chromium:1029379
Change-Id: Ief1229f0dac5f90c5f06d3168c8ffb4b7d1f1b53
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2246566
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68379}
Add v8::CppHeap as an implementation of a cppgc heap that
integrates with V8's existing EmbedderHeapTracer API. The
current implementation only supports non-incremental marking.
Bug: chromium:1056170
Change-Id: I4a09eb5ae57f5c7defe35eb3fe346627eb492473
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2245610
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68374}
... to OptimizedCompilationInfo, BytecodeGraphBuilder, and
JSHeapBroker.
Also add first uses of these flags in pipeline.cc by skipping certain
phases when nci is enabled. With this change, tests in the NCI variant
will start to fail since generic lowering is not fully implemented.
These implementations will follow incrementally in the next days.
Bug: v8:8888
Change-Id: I3f570fb92f09059d1f1f4015f88ffe80ccf746ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2239572
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68339}
This function wasm created as a partial subtyping check after the
subtyping refactoring for wasm-gc, but is really not needed.
Change-Id: I5f3a38dba599f1571e26d29254eb0f8614c16a8b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2241519
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68321}
Since the registration requires calling into the library, there's no
reason to get the heap through a magic getter on API level.
Bug: chromium:1056170
Change-Id: I8d2b1d0fcee8c855908bd26c71a22826c493ed29
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2238568
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68315}
Unified heap support in V8 requires having another (at least internal)
heap that implements a unfied garbage collection strategy. This will
not re-use the already existing cppgc::Heap because there should be no
way in creating such a heap externally or scheduling stand-alone
garbage collections.
In order to have a common token, this CL introduces AllocationHandle
which can be passed to MakeGarbageCollected to allocate C++ objects.
V8 (soon) and the stand-alone heap both have methods to retrieve such
a handle.
This works around a problem with creating diamond class hierarchies
when a base class would be exposed on the public API level.
Fast paths for Blink are still possible because allocation handles can
be cached the same way (e.g. global, or TLS) as a heap can be cached.
Tbr: yangguo@chromium.org
Bug: chromium:1056170
Change-Id: I8e9472a2c24ef82d1178953e8429b1fd8a2344bc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2238027
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68310}
This is a reland of 8748613f6c, fixing
an issue accessing binary op's BinaryOperationHints.
Original change's description:
> [compiler] Hook in binary op builtins with feedback in generic lowering
>
> If --turbo-nci is enabled, use binary op builtins with feedback
> collection during generic lowering.
>
> Bug: v8:8888
> Change-Id: I307dc742488982bdc68006be5bcd1da8e68768f5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228614
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68227}
Bug: v8:8888,chromium:1092553
Change-Id: I1356659d65a5e46bc57bb6c0ebe2e9e86cb8be81
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2237128
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68288}
This fixes two issues:
- labs resetting didn't account bytes as beeing freed;
- large object were not accounted.
The CL introduces a single bottleneck for labs resetting in
ObjectAllocator, which is aware of StatsCollector. This way
NormalSpace is treated as a value object and all invariants
are maintained by ObjectAllocator (and Sweeper).
Bug: chromium:1056170
Change-Id: I027cc01fe5028a3dfa81905d7ea53dd12d1c1f20
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2237629
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68286}
As per the latest update to the 'reference types' wasm proposal, the
nullref type is removed. Following that, all its uses in V8 were also
removed. This CL:
- Removes now dead code referencing nullref.
- Changes names of functions/exceptions containing 'nullref' to 'null'.
- Changes nullref to the corresponding nullable type in some tests.
Bug: v8:7748
Change-Id: I5b4606671d7b24dd48a45a3341e8a1c056fcd1d0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2238026
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68283}
The reference types wasm proposal dropped all subtyping. Subsequently,
the 'anyref' type was renamed to externref.
This changes all references of the *type* anyref to externref.
Additionally, the flag that permits this extension is renamed to
"reftypes" to mirror the proposal name.
Bug: v8:7748
Change-Id: Icf323f13b9660fd10540e65125af053fca3a03f9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2232941
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68270}
Adds allocation-based heap growing strategy that triggers GC based on
some limit. The limit is computed based on previous live memory and a
constant growing factor.
For invoking GC, we support two modes: with and without conservative
stack scanning. Without conservative stack scanning, an invoker makes
sure that we schedule a GC without stack using the existing platform.
Bug: chromium:1056170
Change-Id: I1808aeb5806a6ddd5501b556d6b6b129a85b9cda
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228887
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68235}
If --turbo-nci is enabled, use binary op builtins with feedback
collection during generic lowering.
Bug: v8:8888
Change-Id: I307dc742488982bdc68006be5bcd1da8e68768f5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228614
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68227}
The observers can use ResetAllocatedObjectSize() to e.g. implement a
growing strategy that resets its limit on this call.
Bug: chromium:1056170
Change-Id: Ib9553e00cc530ff89f44e4258c13d47f0b70568e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228885
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68205}
This CL fixes the UnboundLocalError in unittests testsuite.
R=machenbach@chromium.org
Bug: chromium:1091200
Change-Id: I9a4e032915b2750c28e3eb9f97042b75ca547801
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2232540
Commit-Queue: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68203}
Changes:
- Unpack packed typed in arrays/structs where needed.
- i8 should have log-size 0.
- Use typed-funcref feature flag instead of gc where appropriate.
- Set argument indexes correctly for gc opcodes in
function-body-decoder.
- Remove no-longer valid TODOs.
Bug: v8:7748
Change-Id: I1a73794d0f93da6c7177e496d47df4106031f0eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2230520
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68196}
Changes:
- Remove subtyping checks from value-type.h and move them to dedicated
files. Leave a limited version in value-type.h for testing.
- Implement subtyping for struct and array types, according to the
wasm-gc proposal.
- Implement type equivalence checking.
- Introduce a subtyping relation cache in WasmModule.
- Rename IsSubTypeOf -> IsSubtypeOf.
- Fix v8 possible bug where iterator_range took two unused type
parameters.
- Add unittests for subtyping.
Bug: v8:7748
Change-Id: I0ddbda4145e0412196dcf4fc63f3c5875fb3ab5a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228497
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68192}
Due to recent spec changes, We do not have to check if ref.func
instructions in global declarations only refer to declared functions.
Additionally functions referenced in exports and globals are now
considered declared.
R=ecmziegler@chromium.org
Bug: v8:10556
Change-Id: I79856c7d68155a04eb36769ceed8a58fe62a9f9f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228653
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68190}
When accessing a field of a non-class type, Torque will generate a
CallAccess LocationReference, which has an unknown type. We still tried
to access it's type, resulting in a DCHECK failure.
Bug: v8:7793
Change-Id: I3650643e29db852783eca1e166b700eebd1b8dc2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209056
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68180}
All subtyping has been removed from the reference-types proposal. This
CL implements this proposal change now in V8.
R=manoskouk@chromium.org
Bug: v8:10556
Change-Id: I08ef064952278e03ea655461fa9f0c96426157c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2222345
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68152}
This ports HeapStatsCollector (former ThreadHeapStatsCollector) from
Blink. The CL only ports accounting of allocated object size which is
needed for a simple growing strategy in a follow up.
HeapStatsCollector is a global dependency for most sub components as
it provides infrastructure for measuring time (through trace scopes)
and space.
The general idea of HeapStatsCollector is to act as sink where all sub
components push time and space information. This information is then
gathered and made available via an event that is implemented as POD.
Time-dependent info is available through regular getters (pull) and
observers (push).
Change-Id: I40b4d76e1a40c56e5df1a7353622318cde730e26
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2225902
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68150}
This is a followup of the cl [1] that fixes a bug where bytecode was
getting flushed when allocating feedback vector. The fix added
IsCompiledScope before allocating a new feedback vector. We now pass
IsCompiledScope to JSFunction::EnsureFeedbackVector. This makes it
explicit that EnsureFeedbackVector expects a function that is compiled
and the bytecode shouldn't be flushed during the allocation.Also adds
a test.
[1] https://chromium-review.googlesource.com/c/v8/v8/+/2218066
Bug: v8:10560
Change-Id: I552c449a57555dffa625b2e4efa04c2c276fc0b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2222347
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68142}
With recent changes to the anyref proposal, null refs now have a type
immediate which declares the type of a null ref constant. Likewise,
the RefIsNull instruction is type aware now. This CL addresses these
proposal changes now.
R=jkummerow@chromium.org
Bug: v8:10556
Change-Id: I810dfa3a4ab4389afc9639f897cee5d43e9b62cb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2215172
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68141}
This fixes the gcov build.
Bug: chromium:1056170
Change-Id: I40ac42b6fce77367c6a366544abf89fc21075cdc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228510
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68125}
In production, we will always pass a pointer to the decoded module. The
only reason for the existance of the nullptr checks is that tests
sometimes don't pass a module here. Hence we pay in production code for
a test-only feature.
This CL fixes this by always passing a module pointer from the decoder
tests. This even simplifies the code a lot by removing redundant code.
The {TestModuleBuilder} class was moved before the definitions of the
{FunctionBodyDecoderTest} class in order to be able to reuse it there.
It's unmodified otherwise.
R=ahaas@chromium.org
Bug: v8:10576
Change-Id: I7d876bfc8a27b50fe713afb8848fb4f642287cfa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2226749
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68116}
The SourcePositionTableBuilder unconditionally allocates heap memory for
every Liftoff compilation. This shows up with 1-2% of compilation time
in profiles. Hence move the vector contained in the
SourcePositionTableBuilder into the compilation zone. Such a zone
already exists for both Liftoff and TurboFan, so we can easily save
allocations this way.
R=thibaudm@chromium.org
Bug: v8:10576
Change-Id: Ia83d05cc8c36c775ebff6ec2064e9c3f8cc4d384
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2224221
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68112}
If --turbo-nci is enabled, use compare op builtins with feedback
collection during generic lowering.
Bug: v8:8888
Change-Id: I886020e2ee280f65388d9987c70958546f99e0f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2215821
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68100}
Split platform into a process-global initialization part and per-heap
platform objects.
These platform objects still contain allocators and executors. With
per-heap platforms GetForegroundTaskRunner() returns by definition the
correct runner.
In future, when initialized throuhg V8, an adapter can be used to
translate between the different platforms, avoiding the needed for V8
embedders to provide additional information.
Bug: chromium:1056170
Change-Id: I11bdd15e945687cfbdf38cae4137facb02559e0a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2218030
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68059}
Make sure that any GCs required for off-thread heap merging happen
before any off-thread handle transferring (both transferring using
OffThreadTransferHandle, and the handles created for the string slot
fixups). This is to avoid the marker from walking Handle roots that
point into off-thread pages which the sweeper doesn't see (and can't
clear mark bits on)
Now, the merging and handle creation is atomic as far as the GC is
concerned. The merging is done before handle creation to avoid the
incremental marker from entering off-thread pages, but we ensure that
the raw objects pointers that point into the off-thread pages (which
are used for creating the main-thread handles) stay valid until the
handle creation completes.
Since handle transfer now happens in the middle of publishing, this
patch also moves the OffThreadTransferHandleStorage ownership over to
OffThreadHeap. This requires some header juggling to avoid leaking
OffThreadTransferHandleStorage into the off-thread-isolate header.
Bug: chromium:1086478, chromium:1011762
Change-Id: Id5e7622d6b5520400a4872c5f6ad396c74b30ca6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2218058
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68043}
We can do a good job of optimizing Torque expressions that load and
check multiple bitfields from a bitfield struct, but only if those
expressions are written using the binary `&` operator as opposed to the
logical `&&`. This change adds a lint rule to detect some simple cases
where we should clearly prefer `&` to `&&`.
Bug: v8:7793
Change-Id: Id996a7971cff8f7f83198075a172170d9c7d42e9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2207666
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67991}
This reverts commit a35d0e8cb5.
The original CL is likely not a culprit for the infra failures.
Bug: chromium:1056170
Change-Id: I8fa85db8a737fb01328021782f0c43626fa52b0d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2215826
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67977}
This moves concurrent and incremental sweeping from Blink. This also
adds TestPlatform that makes it easier to test concurrent and
incremental sweeping.
Drive-by: fix unmarking of large pages.
Bug: chromium:1056170
Change-Id: Ifd50ff67b9df17ff117a5f4d4eb5a2937d3023be
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2207132
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67969}
We can't consistently rewire the successor blocks of an unreachable node to
disconnect them from the graph when we are trying to maintain the schedule.
Instead simply leave the code there. As a future optimization we could add a
proper scheduled dead code elimination phase which can deal with this.
As a side-effect, one of the tests sees a int64 DeadValue, so add support for that
in the instruction selector.
BUG=chromium:1083272,chromium:1083763,chromium:1084953,v8:9684
Change-Id: I69a6feaeef4eae62110392e27ea848b28bccf787
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209061
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67953}
Sometimes CSA code carefully constructs a mask to check several
bitfields at once. Thus far, such a check has been very awkward to write
in Torque. This change adds a way to do so, using the
non-short-circuiting binary `&` operator. So now you can write an
expression that depends on several bitfields from a bitfield struct,
like `x.a == 5 & x.b & !x.c & x.d == 2` (assuming b is a one-bit value),
and it will be reduced to a single mask and equality check. To
demonstrate a usage of this new reduction, this change ports the trivial
macro IsSimpleObjectMap to Torque. I manually verified that the
generated code for the builtin SetDataProperties, which uses that macro,
is unchanged.
Bug: v8:7793
Change-Id: I4a23e0005d738a6699ea0f2a63f9fd67b01e7026
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2183276
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67948}
The implementation of the StreamingDecoder depends on async compilation.
However, when the --single-threaded flag is set, async compilation is
not available. Therefore V8 does not support streaming compilation at
the moment if the --single-threaded flag is set.
This CL is the first step to support streaming compilation in
--single-threaded mode. This CL makes the StreamingDecoder an abstract
class, and the current implementation a sub-class called
AsyncStreamingDecoder. A follow-up CL will provided a second sub-class
implementation for streaming compilation in --single-threaded mode.
Bug: v8:10548
Change-Id: Ice5c01340d3df18f836a4a05d30571207ca8ccf6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2208869
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67931}
Changes:
Cleanup:
- Make sure read_value_type has the same interface as other
read_* functions, i.e., returns the decoded value and writes
the consumed length into a pointer.
- DecodeLocals is now an instance method.
- DecodeLocals should fail when given a wrong number of locals.
Add tests to catch that.
- Fix a buggy test.
Refactoring in preparation of introducing the 'let'
instruction as per [wasm-gc]:
- DecodeLocals does not consume any input and can start from any pc.
- DecodeLocals gives the option of not appending the decoded
locals to local_types_.
- Separate locals initialization from signature.
Bug: v8:7748
Change-Id: Iaaff87fdb9abe0ddd716484ea3fa87779d2d1a2f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2202992
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67845}
This allows embedding objects in each other and recursively trace
through them.
Bug: chromium:1056170
Change-Id: I4e4ae4c1669109c01003cb6b69797cf271a74033
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2198977
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67841}
Splits out all of PagedSpace and subclasses into paged-spaces.h. Also
moves CodeObjectRegistry to code-object-registry.h.
Bug: v8:10473, v8:10506
Change-Id: I35fab1e545e958eb32f3e39a5e2ce8fb087c2a53
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2201763
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67811}
This reverts commit 580917d252.
Reason for revert: fix in patchset 2
Original change's description:
> Revert "cppgc: Stack scanning using ObjectStartBitmap"
>
> This reverts commit d3a72e3c2a.
>
> Reason for revert: MSAN failures (https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/32360)
>
> Original change's description:
> > cppgc: Stack scanning using ObjectStartBitmap
> >
> > This CL implements stack scanning for cppgc.
> > Given a value on the stack, the MarkingVisitor uses
> > PageBackend::Lookup to checks whether that address is on
> > the heap. If it is, BasePage::TryObjectHeaderFromInnerAddress
> > (introduced in this CL) is used to get the relevant object
> > header. Note that random addresses on the heap might point to
> > free memory, object-start-bitmap, etc.
> >
> > If a valid object header is found:
> > * If the object is not in construction, the GCInfoIndex is used
> > the get the relevant Trace method and the object is traced.
> > * Otherwise, the object is conservatively scanned - i.e. the
> > payload of the object is iterated word by word and each word is
> > treated as a possible pointer.
> >
> > Only addresses pointing to the payload on non-free objects are
> > traced.
> >
> > BasePage::TryObjectHeaderFromInnerAddress assumes on LAB on the
> > relevant space, thus all LABs are reset before scanning the stack.
> >
> > Bug: chromium:1056170
> > Change-Id: I172850f6f1bbb6f0efca8e44ad8fdfe222977b9f
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190426
> > Commit-Queue: Omer Katz <omerkatz@chromium.org>
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#67795}
>
> TBR=ulan@chromium.org,mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
>
> Change-Id: I3caef6f9f55911fd1a86e895c3495d1b98b1eac2
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:1056170
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2201136
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67796}
TBR=ulan@chromium.org,mlippautz@chromium.org,leszeks@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
# Not skipping CQ checks because this is a reland.
Bug: chromium:1056170
Change-Id: If7ea4fe5cb794c07544d5545f5d6548e3375d3ae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2201137
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67803}
The existing non-builtin implementation is returning wrong results.
For example, given the value 63 as a uint8_t it returns 38 (should be 6).
The new implementation follows the naive algorithm presented in figure 5-1
in Hacker's Delight section 5-1.
Note that the algorithm in the book is designed for 32 bit numbers, so we
extended it to support 64 bit as well.
Bug: chromium:1056170
Change-Id: I8fed9c449f80b01b8cc93d339529c0e1e0863fc0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2199345
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67801}
This reverts commit d3a72e3c2a.
Reason for revert: MSAN failures (https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/32360)
Original change's description:
> cppgc: Stack scanning using ObjectStartBitmap
>
> This CL implements stack scanning for cppgc.
> Given a value on the stack, the MarkingVisitor uses
> PageBackend::Lookup to checks whether that address is on
> the heap. If it is, BasePage::TryObjectHeaderFromInnerAddress
> (introduced in this CL) is used to get the relevant object
> header. Note that random addresses on the heap might point to
> free memory, object-start-bitmap, etc.
>
> If a valid object header is found:
> * If the object is not in construction, the GCInfoIndex is used
> the get the relevant Trace method and the object is traced.
> * Otherwise, the object is conservatively scanned - i.e. the
> payload of the object is iterated word by word and each word is
> treated as a possible pointer.
>
> Only addresses pointing to the payload on non-free objects are
> traced.
>
> BasePage::TryObjectHeaderFromInnerAddress assumes on LAB on the
> relevant space, thus all LABs are reset before scanning the stack.
>
> Bug: chromium:1056170
> Change-Id: I172850f6f1bbb6f0efca8e44ad8fdfe222977b9f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190426
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67795}
TBR=ulan@chromium.org,mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
Change-Id: I3caef6f9f55911fd1a86e895c3495d1b98b1eac2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2201136
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67796}
This CL implements stack scanning for cppgc.
Given a value on the stack, the MarkingVisitor uses
PageBackend::Lookup to checks whether that address is on
the heap. If it is, BasePage::TryObjectHeaderFromInnerAddress
(introduced in this CL) is used to get the relevant object
header. Note that random addresses on the heap might point to
free memory, object-start-bitmap, etc.
If a valid object header is found:
* If the object is not in construction, the GCInfoIndex is used
the get the relevant Trace method and the object is traced.
* Otherwise, the object is conservatively scanned - i.e. the
payload of the object is iterated word by word and each word is
treated as a possible pointer.
Only addresses pointing to the payload on non-free objects are
traced.
BasePage::TryObjectHeaderFromInnerAddress assumes on LAB on the
relevant space, thus all LABs are reset before scanning the stack.
Bug: chromium:1056170
Change-Id: I172850f6f1bbb6f0efca8e44ad8fdfe222977b9f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190426
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67795}
This is needed to trace objects found durinbg stack scanning.
Bug: chromium:1056170
Change-Id: I1280d98f2fe69281c514b3a7d4a57f909a2eed96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190425
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67788}
Add const Page iterators to Spaces, and add whichever const methods are
necessary for this to work. This and a couple more const methods allows
us to make Heap::Contains const.
Change-Id: I1b63a10575ccdb8a3979aef4fa63a97b288ff836
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2198975
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67776}
Fold distinct MUL and ADD (or SUB) instructions into a single MLA (or
MLS) instruction, mirroring what is being done for general purpose
registers.
SIMD wasm only uses the vectorized ADD and MUL instructions on quad
vectors (NEON Q), so only those cases are handled.
SIMD wasm only uses MUL by vectors, not by elements so there is no need
to check for an addition and shift reduction.
Change-Id: If07191dde9fb1dc37a5de27187800c15cc4325ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2184239
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Martyn Capewell <martyn.capewell@arm.com>
Cr-Commit-Position: refs/heads/master@{#67770}
This CL adds 2 new values to the EmbedderStackState enum with more
explicit names. The old values are updated as aliases to the new
values and marked as soon to be deprecated. This CL also moves the
enum to v8-platform.h so that it can be reused by cppgc.
Depracating individual values in an enum is supported by GCC only
since version 6. Thus new macros were needed for the deprecation
(which delegate to the existing macros when supported). GCC versions
older than 6 are still used by the CQ bots.
Bug: chromium:1056170
Change-Id: Id1ea73edfbbae282b0d8a3bb103dbbbf8ebd417e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2188971
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67744}
The visitor was removing pages while at the same time iterating them on
NormalPagedSpace.
Removing all pages at once is safe and should also be faster.
Bug: chromium:1056170
Change-Id: I56eedf6f09498f126cb09238e01962b48e75b657
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190427
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67687}
Background threads can now start incremental marking when necessary. In
contrast to the main thread they always need to schedule a job and can't
start incremental marking right away. Background threads also use a
simpler heuristic for deciding whether to start incremental marking.
Bug: v8:10315
Change-Id: I2b94e8273c8be860157fe9670797048ed1c5c3da
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2184149
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67675}
This patch provides infrastructure to pin object types to specific
spaces. This allows embedders to create mutual exclusive arenas for
certain (base) types. In future, this will also be used to provide
sliding-window compaction on certain custom spaces.
We mainly preserve the existing infrastructure with the difference
that spaces are now slightly more dynamic than in Blink as they are
kept in a vector instead of a fixed-size array.
The mechanism differs from Blink in that it does not allow the user
object to call allocation methods directly but instead provides a
trait that can be overridden to specify a custom space.
The patch preserves templatization for objects that do not go into
custom spaces to safe a branch in the allocation hot path.
Change-Id: I08aa6932348e2d6258e19c4a32d189865f459f02
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2187611
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67666}
This CL introduces:
- Worklist
- MarkingHandler to manage gc marking phase
- Integration into CollectGarbage for atomic pause GC
- MarkingVisitor for main thread marking
Still missing from this CL:
- Proper handling for stack scanning
- Handling of previously not fully constructed objects
Bug: chromium:1056170
Change-Id: I70ac8534dfb898777cf3a06e3119cac8072174fd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170526
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67642}
Returned LABs can be of size less than sizeof(FreeListEntry).
Bug: chromium:1056170
Change-Id: Ib4094701472ce7cb5ee20b9fe632651570832dc9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2183051
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67635}
Destructors are allowed to allocate without triggering recursive
garbage collections.
This changes NoGCScope to provide a soft-bailout for garbage
collections to avoid introducing yet another scope.
Bug: chromium:1056170
Change-Id: I0fe51a21977ae954221b6b64b2f6e938ff6d3264
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2185131
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67632}
Adds a public method that embedders can use to trigger garbage
collections. Such garbage collections are always required to have a
source and reason specifying which components calls it why.
Change-Id: I6ae983f99227febc1b7f0dd15c191d5b1eaaf3f3
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2181332
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67631}
Motivation:
There were three versions of type decoding for wasm in the codebase.
Not all of them decoded gc types with immediates (reference types)
correctly.
Changes:
- Refactor the wasm binary decoder for unify type decoding.
- Update BranchTypeImmediate and SelectTypeImmediate to handle
reference types.
Reference: https://github.com/WebAssembly/gcR=jkummerow@chromium.org
Bug: v8:7748
Change-Id: I33b38c911d366570ca6ef2723ded5205698e1979
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2179003
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67614}
Move rewriting, scope analysis, and internalization, to be unconditional
operations done after parsing rather than a separate compile phase. This
removes some of the complexity about rememberering when to call
Compiler::Analyze, and makes these paths a bit more uniform.
Also, forbid allocating any more AST strings after AstValueFactory
internalization, by nulling out the Zone. Add an InternalizePartial
method which doesn't null out the zone for those cases where we do want
to be able to allocate after internalizing (e.g. internalization before
scope analysis).
Change-Id: Id444246d8362a1d169baf664fc37657d9576fd96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2182458
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67608}
Fully remove the successor blocks when effect-control-linearization
reaches an unreachable node and is maintaining the schedule. Previously
we just updated the current_block_'s successor and removed any
unreachable predecessors from end, however if the current_block_ is not
an original block in the schedule, but a new one added due to control
flow from effect control linearization lowering, the removed successor
blocks could still be re-connected to the end block when they were
lowered. Instead, entirely remove these unreachable blocks from the
predecessor / successor chains, and have the effect-control-linearizer
avoid lowering these blocks entirely.
BUG=chromium:1076569,v8:9684
Change-Id: I4b4216019d55aef5363d88255726b85df8e7ada5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2179842
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67595}
The serializer currently cannot handle a heap state containing
arbitrary compiled Code objects. As a quick fix for the
--stress-snapshot d8 flag, we clear compiled data from the isolate
prior to the serialize-deserialize-verify pass.
With this change, mjsunit tests pass on x64.
The %SerializeDeserializeNow() runtime function would require more
work, since it is not possible to mutate the heap to this extent while
still preserving a runnable host context and isolate. We will need
another solution there.
Drive-by: Skip the stress_snapshot variant except for the mjsunit
suite.
Tbr: machenbach@chromium.org
Bug: v8:10493,v8:10416
Change-Id: Ie110da8b51613fcd69c7f391d3cf8589d6b04dd8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2182429
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67585}
This ports sweeper logic from Blink into a separate entity - Sweeper.
Concurrent sweeping is in a followup.
Bug: chromium:1056170
Change-Id: I41196225f0d882cb0ab5190d23e297ee2498df6b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2167858
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67581}
Marja pointed out that the following code causes a Torque crash:
Convert<Smi>(MessageTemplate::kFoo)
This change is a small fix to not crash in that case.
Bug: v8:7793, v8:10475
Change-Id: I7856366856a4cd7facdb19686a2d4c92b0d04516
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2182175
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#67580}
This function is always called right after creating the DefaultPlatform,
hence merge it into the constructor.
R=mlippautz@chromium.org
Change-Id: I4afb14c83740224056157665db6b854c659da0c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2182635
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67573}
Wasm modules generated by emscripten today have two ways to point to
debug symbol files, the source mapping url and external debug info
custom sections. To support both, this CL extends CDP to appropriately
report the symbol type and location.
Bug: chromium:1064248
Change-Id: I9076034f6d73901d8a9c5cfd7c2988fb30bb14c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116208
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67571}
This adds PostConstructionCallbackTrait which can be used to get a
callback that is executed right after an object instance is created.
This can be useful for hooks that require to be able to call into
virtual methods.
Bug: chromium:1074061
Change-Id: Idd5ef677fed291bcba81b9a47f2932c9bb5832b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2179385
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67557}
Also makes memory-chunk.h accessible from outside heap which allows
removal of some heap-inl.h includes.
Bug: v8:10473, v8:10496
Change-Id: Iec4fc5ce8ad201f6ee5fd924cc3cd935324429fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2172088
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67551}
ROL will be optional operator as arm, arm64 only have ROR.
The reason for this CL is inefficient Wasm codegen for 64-bit
left-rotation.
Bug: v8:10216
Change-Id: I0cd13e4b6de5276a0d0b80eac5ed9c2e52ba1f96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157648
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67518}
Torque desugars try-catch/label constructs with several handlers
into nested try structures, with the first handler ending-up
innermost. So currently, if you write
try {
...
} label Foo {
Throw(...);
} catch (e) {
}
The catch will catch the preceding Throw in another handler.
This is different from how multiple try-catch handlers are done in
languages like Java, where throwing from a preceding catch handler
is not caught by a later one. To avoid this possible ambiguity, this
CL prohibits this pattern, enforcing that a catch handler comes first,
before any other label-handler attached to the same try.
This way, a catch handler never catches from any other handler on the
same try, since they have to come later.
Bug: v8:7793
Change-Id: I943f14b2393d307c4254a3fc3a78f236dbcf86df
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2169098
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67516}
The interpreter will be un-shipped soon, hence we cannot have a
compilation hint for interpreted execution.
This CL removes the respective enum value, removes a test which
specifically tested this one option, and adapts other code to use one of
the remaining hints.
R=ahaas@chromium.org
Bug: v8:10389
Change-Id: Ia754f7de95be271000a9e4e10ef2a3ee171da627
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2172748
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67491}
This is a reland of 43b885a842
This fixes another signed overflow in the unit test.
Original change's description:
> Reland "[turbofan][csa] optimize Smi untagging better"
>
> This is a reland of ff22ae80e2
>
> Original change's description:
> > [turbofan][csa] optimize Smi untagging better
> >
> > - Introduce new operator variants for signed right-shifts with the
> > additional information that they always shift out zeros.
> > - Use these new operators for Smi untagging.
> > - Merge left-shifts with a preceding Smi-untagging shift.
> > - Optimize comparisons of Smi-untagging shifts to operate on the
> > unshifted word.
> > - Optimize 64bit comparisons of values expanded from 32bit to use
> > a 32bit comparison instead.
> > - Change CodeStubAssembler::UntagSmi to first sign-extend and then
> > right-shift to enable better address computations for Smi indices.
> >
> > Bug: v8:9962
> > Change-Id: If91300f365e8f01457aebf0bd43bdf88b305c460
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135734
> > Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> > Reviewed-by: Georg Neis <neis@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#67378}
>
> Bug: v8:9962
> Change-Id: Ieab0755806c95fb50022eb17596fb0c95f36004c
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170001
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67430}
Bug: v8:9962
TBR: neis@chromium.org
Change-Id: I79883db546bf37873b3727b8023ef688507091d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2169103
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67464}
The worklist in this CL is a merge of the worklists of Oilpan and V8. This implementation supports both use cases and should serve as the shared worklist once we start merging the codebase.
Bug: chromium:1056170
Change-Id: I4ecdb475f3900c33eced9249efa112a69c1b2707
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170828
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67459}
HeapVisitor is a simple visitor implementing both visitation and accept
interfaces. HeapVisitor is aimed to replace functions that traverse the
heap in Blink: PrepareForSweep, Sweep, FinalizeSweep, MakeConsistentForGC,
ObjectPayloadSize, VerifyObjectStartBitmap, CollectStatistics, etc.
This CL also introduces a Heap::ObjectPayloadSize function.
Bug: chromium:1056170
Change-Id: I85a2b8b572486bea29704fc436b002d8f7405201
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2165733
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67458}
Creates a new large-spaces.h and large-spaces.cc to contain
LargeObjectSpace and subclasses.
Bug: v8:10473
Change-Id: Ifdb4eac9df5c8213f992d549e04b612b62f6df0b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170826
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67456}
When creating a filler, we pass through whether we need to clear slots
in the old to new remembered set.
This patch adds a verification check that, when we claim we don't need
to clear slots, checks that no slots are set in the remembered set for
the range of the filler. Effectively, this is a range counterpart to
VerifyClearedSlot.
Change-Id: Id994c56d941988cc282463304bc7307a51943e99
Bug: chromium:1075999
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139572
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67453}
base::List is only used inside of heap and has some pretty strange
semantics that don't lend themselves to it being a general purpose data
structure so this moves it to heap where it can be safe isolated.
Bug: v8:10454
Change-Id: I7921c22286276432956005c72143b22b0364fc93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170029
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67448}
This reverts commit 43b885a842.
Reason for revert: Still fails on UBSan: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10873
Original change's description:
> Reland "[turbofan][csa] optimize Smi untagging better"
>
> This is a reland of ff22ae80e2
>
> Original change's description:
> > [turbofan][csa] optimize Smi untagging better
> >
> > - Introduce new operator variants for signed right-shifts with the
> > additional information that they always shift out zeros.
> > - Use these new operators for Smi untagging.
> > - Merge left-shifts with a preceding Smi-untagging shift.
> > - Optimize comparisons of Smi-untagging shifts to operate on the
> > unshifted word.
> > - Optimize 64bit comparisons of values expanded from 32bit to use
> > a 32bit comparison instead.
> > - Change CodeStubAssembler::UntagSmi to first sign-extend and then
> > right-shift to enable better address computations for Smi indices.
> >
> > Bug: v8:9962
> > Change-Id: If91300f365e8f01457aebf0bd43bdf88b305c460
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135734
> > Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> > Reviewed-by: Georg Neis <neis@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#67378}
>
> Bug: v8:9962
> Change-Id: Ieab0755806c95fb50022eb17596fb0c95f36004c
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170001
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67430}
TBR=neis@chromium.org,tebbi@chromium.org
Change-Id: I49e19811ebcecb846f61291bc0c4a0d8b0bc4cff
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9962
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2168876
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67431}
This is a reland of ff22ae80e2
Original change's description:
> [turbofan][csa] optimize Smi untagging better
>
> - Introduce new operator variants for signed right-shifts with the
> additional information that they always shift out zeros.
> - Use these new operators for Smi untagging.
> - Merge left-shifts with a preceding Smi-untagging shift.
> - Optimize comparisons of Smi-untagging shifts to operate on the
> unshifted word.
> - Optimize 64bit comparisons of values expanded from 32bit to use
> a 32bit comparison instead.
> - Change CodeStubAssembler::UntagSmi to first sign-extend and then
> right-shift to enable better address computations for Smi indices.
>
> Bug: v8:9962
> Change-Id: If91300f365e8f01457aebf0bd43bdf88b305c460
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135734
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67378}
Bug: v8:9962
Change-Id: Ieab0755806c95fb50022eb17596fb0c95f36004c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170001
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67430}
This adds the following:
1) Heap object structure classes: RawHeap, BaseArena and BasePage.
- freelist
- linear allocation block
2) ObjectAllocator, a class responsible for object (and page) allocation.
The design doc with UML design: https://bit.ly/2VVTcqc
User defined arenas are followup.
Bug: chromium:1056170
Change-Id: I69a82974bd08e3cf3da90041b1628297cc890891
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2167392
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67425}
Extend the flag parameter with a bit that decides if the input should
be converted (-0 to 0, and a string to the array index it represents).
Instruct redundancy elimination to never replace x with CheckBounds(x)
when this CheckBounds is of the converting kind.
Bug: chromium:1070892, chromium:1071743
Change-Id: I3125a6e267d56dae6bf6cb2f5f52d27ef65d7c79
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157365
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67408}
This reverts commit ff22ae80e2.
Reason for revert: new test fails on UBSAN
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10831
Original change's description:
> [turbofan][csa] optimize Smi untagging better
>
> - Introduce new operator variants for signed right-shifts with the
> additional information that they always shift out zeros.
> - Use these new operators for Smi untagging.
> - Merge left-shifts with a preceding Smi-untagging shift.
> - Optimize comparisons of Smi-untagging shifts to operate on the
> unshifted word.
> - Optimize 64bit comparisons of values expanded from 32bit to use
> a 32bit comparison instead.
> - Change CodeStubAssembler::UntagSmi to first sign-extend and then
> right-shift to enable better address computations for Smi indices.
>
> Bug: v8:9962
> Change-Id: If91300f365e8f01457aebf0bd43bdf88b305c460
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135734
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67378}
TBR=neis@chromium.org,tebbi@chromium.org
Change-Id: I2617d7a44e5ae33fd79322d37c8b722c00162d22
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9962
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2165873
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67380}
- Introduce new operator variants for signed right-shifts with the
additional information that they always shift out zeros.
- Use these new operators for Smi untagging.
- Merge left-shifts with a preceding Smi-untagging shift.
- Optimize comparisons of Smi-untagging shifts to operate on the
unshifted word.
- Optimize 64bit comparisons of values expanded from 32bit to use
a 32bit comparison instead.
- Change CodeStubAssembler::UntagSmi to first sign-extend and then
right-shift to enable better address computations for Smi indices.
Bug: v8:9962
Change-Id: If91300f365e8f01457aebf0bd43bdf88b305c460
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135734
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67378}
The impl works by posting up to NumberOfWorkerThreads() tasks
with CallOnWorkerThread().
Change-Id: I188ac57c9e5d6e3befdcc6f945fbf337dabe1d1d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2130886
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67368}
This is a reland of 29c1eab92e
Original change's description:
> [builtins] Clean up the use of class_name / ES5 [[Class]]
>
> Before ES2015, the ES spec had a [[Class]] internal slot for all
> objects, which Object.prototype.toString() would use to figure the
> returned string. Post-ES2015, the [[Class]] slot was removed in spec for
> all objects, with the @@toStringTag well-known symbol the proper way to
> change Object.prototype.toString() output.
>
> At the time, spec-identical handling without the use of [[Class]] was
> implemented in V8 for all objects other than API objects, where issues
> with the Web IDL spec [1] prevented Blink, and hence V8, to totally
> migrate to @@toStringTag. However, since 2016 [2] Blink has been setting
> @@toStringTag on API class prototypes to manage the
> Object.prototype.toString() output, so the legacy [[Class]] handling in
> V8 has not been necessary for the past couple of years.
>
> This CL removes the remaining legacy [[Class]] handling in
> Object.prototype.toString(), JSReceiver::class_name(), and
> GetConstructorName(). However, it does not remove the class_name field
> in FunctionTemplateInfo, as it is still used for the `name` property of
> created functions.
>
> This CL also cleans up other places in the codebase that still reference
> [[Class]].
>
> This change should have minimal impact on web-compatibility. For the
> change to be observable, a script must do one of the following:
>
> 1. delete APIConstructor.prototype[Symbol.toStringTag];
> 2. Object.setPrototypeOf(apiObject, somethingElse);
>
> Before this CL, these changes will not change the apiObject.toString()
> output. But after this CL, they will make apiObject.toString() show
> "[object Object]" (in the first case) or the @@toStringTag of the other
> prototype (in the latter case).
>
> However, both are deemed unlikely. @@toStringTag is not well-known
> feature of JavaScript, nor does it get tampered much on API
> constructors. In the second case, setting the prototype of an API object
> would effectly render the object useless, as all its methods (including
> property getters/setters) would no longer be accessible.
>
> Currently, @@toStringTag-based API object branding is not yet
> implemented by other browsers. This V8 bug in particular has been an
> impediment to standardizing toString behavior. Fixing this bug will
> unblock [3] and lead to a better Web IDL spec, and better toString()
> compatibility for all.
>
> [1]: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28244
> [2]: https://crrev.com/909c0d7d5a53c8526ded351683c65ea7d17531d4
> [3]: https://github.com/heycam/webidl/pull/357
>
> Bug: chromium:793406
> Cq-Include-Trybots: luci.chromium.try:linux-rel
> Change-Id: Iceded24e37afa2646ec385d5018909f55b177f93
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2146996
> Commit-Queue: Timothy Gu <timothygu@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67327}
Bug: chromium:793406
Change-Id: Ia5d97bd4e1c44cadc6f18a17ffc9d06b038cf8f1
Cq-Include-Trybots: luci.chromium.try:linux-rel
Cq-Include-Trybots: luci.v8.try:v8_linux_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2163881
Auto-Submit: Timothy Gu <timothygu@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67361}
This reverts commit 29c1eab92e.
Reason for revert: Causes Blink test failures:
https://ci.chromium.org/p/v8/builders/ci/V8%20Blink%20Linux/4222
Original change's description:
> [builtins] Clean up the use of class_name / ES5 [[Class]]
>
> Before ES2015, the ES spec had a [[Class]] internal slot for all
> objects, which Object.prototype.toString() would use to figure the
> returned string. Post-ES2015, the [[Class]] slot was removed in spec for
> all objects, with the @@toStringTag well-known symbol the proper way to
> change Object.prototype.toString() output.
>
> At the time, spec-identical handling without the use of [[Class]] was
> implemented in V8 for all objects other than API objects, where issues
> with the Web IDL spec [1] prevented Blink, and hence V8, to totally
> migrate to @@toStringTag. However, since 2016 [2] Blink has been setting
> @@toStringTag on API class prototypes to manage the
> Object.prototype.toString() output, so the legacy [[Class]] handling in
> V8 has not been necessary for the past couple of years.
>
> This CL removes the remaining legacy [[Class]] handling in
> Object.prototype.toString(), JSReceiver::class_name(), and
> GetConstructorName(). However, it does not remove the class_name field
> in FunctionTemplateInfo, as it is still used for the `name` property of
> created functions.
>
> This CL also cleans up other places in the codebase that still reference
> [[Class]].
>
> This change should have minimal impact on web-compatibility. For the
> change to be observable, a script must do one of the following:
>
> 1. delete APIConstructor.prototype[Symbol.toStringTag];
> 2. Object.setPrototypeOf(apiObject, somethingElse);
>
> Before this CL, these changes will not change the apiObject.toString()
> output. But after this CL, they will make apiObject.toString() show
> "[object Object]" (in the first case) or the @@toStringTag of the other
> prototype (in the latter case).
>
> However, both are deemed unlikely. @@toStringTag is not well-known
> feature of JavaScript, nor does it get tampered much on API
> constructors. In the second case, setting the prototype of an API object
> would effectly render the object useless, as all its methods (including
> property getters/setters) would no longer be accessible.
>
> Currently, @@toStringTag-based API object branding is not yet
> implemented by other browsers. This V8 bug in particular has been an
> impediment to standardizing toString behavior. Fixing this bug will
> unblock [3] and lead to a better Web IDL spec, and better toString()
> compatibility for all.
>
> [1]: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28244
> [2]: https://crrev.com/909c0d7d5a53c8526ded351683c65ea7d17531d4
> [3]: https://github.com/heycam/webidl/pull/357
>
> Bug: chromium:793406
> Cq-Include-Trybots: luci.chromium.try:linux-rel
> Change-Id: Iceded24e37afa2646ec385d5018909f55b177f93
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2146996
> Commit-Queue: Timothy Gu <timothygu@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67327}
TBR=verwaest@chromium.org,timothygu@chromium.org
Change-Id: I678d2ffc1064b1d1ddb62024cc23c6c41b216ef4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:793406
Cq-Include-Trybots: luci.chromium.try:linux-rel
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2163956
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67349}
Introduce an OffThreadTransferHandle (and OffThreadTransferMaybeHandle),
which points to a piece of storage known to (and owned by) the
OffThreadIsolate. On Publish, the OffThreadIsolate converts this storage
stub from a raw pointer to an off-thread object into a main-thread
Handle.
This allows users of an OffThreadIsolate to not have to worry (as much)
about the dance of saving raw object pointers before off-thread finishes
and converting those to Handles before it off-thread isolate is
published.
Bug: chromium:1011762
Change-Id: I7ceb4ed85e770bd6e1867649188597bbcaedb32d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2161066
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67337}
Move the persistent compilation state and Isolate inputs (such as the
allocator, shared AST constants, hash seed, logger, etc.) which survives
across both parse and compile, out of ParseInfo and into a new
UnoptimizedCompileState class. Also add UnoptimizedCompilePerThreadState
for per-thread state such as stack limit and RCS.
In particular, this new state survives the ParseInfo being destructed,
which means it is available after off-thread finalization. This allows a
followup to access the PendingCompilationErrorHandler after finalization
and report errors on merge.
Bug: v8:10314
Change-Id: Ia186bc0f267c704efd771aa1895f50a4525a8364
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105636
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67329}
Before ES2015, the ES spec had a [[Class]] internal slot for all
objects, which Object.prototype.toString() would use to figure the
returned string. Post-ES2015, the [[Class]] slot was removed in spec for
all objects, with the @@toStringTag well-known symbol the proper way to
change Object.prototype.toString() output.
At the time, spec-identical handling without the use of [[Class]] was
implemented in V8 for all objects other than API objects, where issues
with the Web IDL spec [1] prevented Blink, and hence V8, to totally
migrate to @@toStringTag. However, since 2016 [2] Blink has been setting
@@toStringTag on API class prototypes to manage the
Object.prototype.toString() output, so the legacy [[Class]] handling in
V8 has not been necessary for the past couple of years.
This CL removes the remaining legacy [[Class]] handling in
Object.prototype.toString(), JSReceiver::class_name(), and
GetConstructorName(). However, it does not remove the class_name field
in FunctionTemplateInfo, as it is still used for the `name` property of
created functions.
This CL also cleans up other places in the codebase that still reference
[[Class]].
This change should have minimal impact on web-compatibility. For the
change to be observable, a script must do one of the following:
1. delete APIConstructor.prototype[Symbol.toStringTag];
2. Object.setPrototypeOf(apiObject, somethingElse);
Before this CL, these changes will not change the apiObject.toString()
output. But after this CL, they will make apiObject.toString() show
"[object Object]" (in the first case) or the @@toStringTag of the other
prototype (in the latter case).
However, both are deemed unlikely. @@toStringTag is not well-known
feature of JavaScript, nor does it get tampered much on API
constructors. In the second case, setting the prototype of an API object
would effectly render the object useless, as all its methods (including
property getters/setters) would no longer be accessible.
Currently, @@toStringTag-based API object branding is not yet
implemented by other browsers. This V8 bug in particular has been an
impediment to standardizing toString behavior. Fixing this bug will
unblock [3] and lead to a better Web IDL spec, and better toString()
compatibility for all.
[1]: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28244
[2]: https://crrev.com/909c0d7d5a53c8526ded351683c65ea7d17531d4
[3]: https://github.com/heycam/webidl/pull/357
Bug: chromium:793406
Cq-Include-Trybots: luci.chromium.try:linux-rel
Change-Id: Iceded24e37afa2646ec385d5018909f55b177f93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2146996
Commit-Queue: Timothy Gu <timothygu@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67327}
- implemented as a single-linked list with head and tail
pointers. The tail pointer is needed for freelist appending;
- stores entries in buckets, where bucket[log2(size)] stores
entries >= size;
- implements worst fit allocation to amortize free list call;
- ported from Blink: https://bit.ly/2yC8XKJ.
Bug: chromium:1056170
Change-Id: I26cf62c948c95a7cbfecd5f7f22ad975e6b8c732
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157376
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67310}
This is a reland of e1b93a4ff5
which was a reland of 313d4844d9
which was a reland of 0a59e0cb08
which was a reland of 146f5375da
which was a reland of d91679bf3a
Give up on using C++ bitfields, go back to having base::BitField and
getters/setters.
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
TBR=ulan@chromium.org,szuend@chromium.org
Bug: v8:10314
Change-Id: I54bcd107a0e85cf1a2ddeef0759100547eb65652
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157378
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67309}
This is a reland of 80843eda31
Original change's description:
> [torque] Allow storing to bitfield structs that are stored in Smis
>
> This change:
> 1. Updates the Torque compiler to allow direct access to bitfields that
> are packed within Smi values, which previously would have required a
> separate untagging step,
> 2. Updates JSRegExpStringIterator to represent its flags in Torque,
> 3. Adds reduction cases in MachineOperatorReducer for when the input to
> a branch or the left-hand side of a Word32Equals is based on a 64-bit
> shift-and-mask operation which has been truncated to 32 bits, as is
> the case in the code generated by step 1, and
> 4. Adds a reduction case in MachineOperatorReducer to remove an extra
> Word64And operation added by step 1.
>
> Bug: v8:7793
> Change-Id: Ib4ac2def6211b3cae6be25a8b2a644be5c7d6d3f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2119225
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67290}
Bug: v8:7793
Change-Id: I783b6ec080042fec0e922927f6675dede458a072
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2159731
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67305}
When compiling modules with many functions, the list of regions in the
{DisjointAllocationPool} can become quite large if the functions die in
a random order (which they typically do, since the order of Liftoff
compilation is different than the order to TurboFan compilation; which
work stealing, both are nondeterministic).
Iterating the list of regions in the {DisjointAllocationPool} was thus
linear in the number of regions, which is linear in the number of
functions of the module. Since we insert new regions one by one, overall
runtime was quadratic.
This CL fixes this by switching from a linked list to a std::set.
Merging a new region is thus logarithmic instead of linear, and overall
we are {n*log(n)} instead of {n^2}.
Note: For {AllocateInRegion} we still need to linearly iterate all
regions that overlap the requested region, but this has not shown to be
a problem so far.
R=ahaas@chromium.org
Bug: v8:10432
Change-Id: I193e56c2abab782e386194fbe64dadfa250916f7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2154797
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67303}
This reverts commit 80843eda31.
Reason for revert: Causes compilation failure on macs
https://ci.chromium.org/p/v8/builders/ci/Mac%20V8%20FYI%20Release%20(Intel)/8934?
Original change's description:
> [torque] Allow storing to bitfield structs that are stored in Smis
>
> This change:
> 1. Updates the Torque compiler to allow direct access to bitfields that
> are packed within Smi values, which previously would have required a
> separate untagging step,
> 2. Updates JSRegExpStringIterator to represent its flags in Torque,
> 3. Adds reduction cases in MachineOperatorReducer for when the input to
> a branch or the left-hand side of a Word32Equals is based on a 64-bit
> shift-and-mask operation which has been truncated to 32 bits, as is
> the case in the code generated by step 1, and
> 4. Adds a reduction case in MachineOperatorReducer to remove an extra
> Word64And operation added by step 1.
>
> Bug: v8:7793
> Change-Id: Ib4ac2def6211b3cae6be25a8b2a644be5c7d6d3f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2119225
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67290}
TBR=tebbi@chromium.org,seth.brenith@microsoft.com,nicohartmann@chromium.org
Change-Id: Ifa683c92631291c9437438682b6efb2e12862682
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7793
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2159730
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67291}
This change:
1. Updates the Torque compiler to allow direct access to bitfields that
are packed within Smi values, which previously would have required a
separate untagging step,
2. Updates JSRegExpStringIterator to represent its flags in Torque,
3. Adds reduction cases in MachineOperatorReducer for when the input to
a branch or the left-hand side of a Word32Equals is based on a 64-bit
shift-and-mask operation which has been truncated to 32 bits, as is
the case in the code generated by step 1, and
4. Adds a reduction case in MachineOperatorReducer to remove an extra
Word64And operation added by step 1.
Bug: v8:7793
Change-Id: Ib4ac2def6211b3cae6be25a8b2a644be5c7d6d3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2119225
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67290}
This reverts commit e1b93a4ff5.
Reason for revert: MSVC failing https://ci.chromium.org/p/v8/builders/ci/V8%20Win64%20-%20msvc/13274
Original change's description:
> Reland^4 "[parser] Introduce UnoptimizedCompileFlags"
>
> This is a reland of 313d4844d9
> which was a reland of 0a59e0cb08
> which was a reland of 146f5375da
> which was a reland of d91679bf3a
>
> Manually zero out flags with memset, since GCC appears not to initialize
> the bitfield values to zero even with a default constructor.
>
> Original change's description:
> > [parser] Introduce UnoptimizedCompileFlags
> >
> > UnoptimizedCompileFlags defines the input flags shared between parse and
> > compile (currently parse-only). It is set initially with some values, and
> > is immutable after being passed to ParseInfo (ParseInfo still has getters
> > for the fields, but no setters).
> >
> > Since a few of the existing flags were output flags, ParseInfo now has a
> > new output_flags field, which will eventually migrate to a ParseOutputs
> > structure.
> >
> > Bug: v8:10314
> > Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#66782}
>
> TBR=ulan@chromium.org,szuend@chromium.org,rmcilroy@chromium.org
>
> Bug: v8:10314
> Change-Id: I23bd6f9f14e9d0bbdde91aad46be1a646fd9647d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157372
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67271}
TBR=ulan@chromium.org,rmcilroy@chromium.org,leszeks@chromium.org,szuend@chromium.org
Change-Id: I0f41e847d4edae67e131cc6d0f782137ab73bac2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157377
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67275}
This is a reland of 313d4844d9
which was a reland of 0a59e0cb08
which was a reland of 146f5375da
which was a reland of d91679bf3a
Manually zero out flags with memset, since GCC appears not to initialize
the bitfield values to zero even with a default constructor.
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
TBR=ulan@chromium.org,szuend@chromium.org,rmcilroy@chromium.org
Bug: v8:10314
Change-Id: I23bd6f9f14e9d0bbdde91aad46be1a646fd9647d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157372
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67271}
Refactors out the allocation and space merging parts of OffThreadFactory
into a new OffThreadHeap class. This allows a separation of concerns
between allocating/merging and initializing, and future-proofs the
factory code against off-thread allocation implementation changes (e.g.
LocalHeap).
Bug: chromium:1011762
Change-Id: I876906dbfd50f8aafe56af2e63e5fe35e4f7f8e9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157369
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67270}
This reverts commit 313d4844d9.
Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/6354
Original change's description:
> Reland^3 "[parser] Introduce UnoptimizedCompileFlags"
>
> This is a reland of 0a59e0cb08
> which was a reland of 146f5375da
> which was a reland of d91679bf3a
>
> Initializes the BackgroundCompileTasks's language_mode in the
> constructor (previously only initialized after successful parse) in case
> the parse failed. We still need to reset it after parse in case the
> language mode changed (because we encountered "use strict").
>
> Original change's description:
> > [parser] Introduce UnoptimizedCompileFlags
> >
> > UnoptimizedCompileFlags defines the input flags shared between parse and
> > compile (currently parse-only). It is set initially with some values, and
> > is immutable after being passed to ParseInfo (ParseInfo still has getters
> > for the fields, but no setters).
> >
> > Since a few of the existing flags were output flags, ParseInfo now has a
> > new output_flags field, which will eventually migrate to a ParseOutputs
> > structure.
> >
> > Bug: v8:10314
> > Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#66782}
>
> TBR=ulan@chromium.org,szuend@chromium.org,rmcilroy@chromium.org
>
> Bug: v8:10314
> Change-Id: Ieee0bbfade4fe0b56de03bff47a7364959608d6a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157367
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67265}
TBR=leszeks@chromium.org
Change-Id: I90ac035caa76d4c4baf5ce207247d1ce5169fb2f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157370
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67266}
This is a reland of 0a59e0cb08
which was a reland of 146f5375da
which was a reland of d91679bf3a
Initializes the BackgroundCompileTasks's language_mode in the
constructor (previously only initialized after successful parse) in case
the parse failed. We still need to reset it after parse in case the
language mode changed (because we encountered "use strict").
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
TBR=ulan@chromium.org,szuend@chromium.org,rmcilroy@chromium.org
Bug: v8:10314
Change-Id: Ieee0bbfade4fe0b56de03bff47a7364959608d6a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157367
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67265}
This reverts commit f442b03fe2.
Reason for reland: Wrongly reverted.
Original change's description:
> Revert "[turbofan] Fix bug in Number.Min/Max typings"
>
> This reverts commit 4158af83db.
>
> Reason for revert: causing UBSAN failures:
>
> https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10729?
>
>
> Original change's description:
> > [turbofan] Fix bug in Number.Min/Max typings
> >
> > They try to be very precise about when the result can be -0,
> > but do so incorrectly. I'm changing the code to just do the
> > simple thing instead. Let's see how that affects performance.
> >
> > Bug: chromium:1072171
> > Change-Id: I9737a84aa19d06685af5b7bca541e348dc37cca8
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157028
> > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> > Commit-Queue: Georg Neis <neis@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#67246}
>
> TBR=neis@chromium.org,tebbi@chromium.org
>
> Change-Id: I0d9b312e27f5a8bbbebeccdc9819fa94f10af139
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:1072171
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157646
> Reviewed-by: Francis McCabe <fgm@chromium.org>
> Commit-Queue: Francis McCabe <fgm@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67249}
TBR=neis@chromium.org,tebbi@chromium.org,fgm@chromium.org
Change-Id: Ida36ca584a5af5da887189328c8da195b26285d4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1072171
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157368
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67263}
This reverts commit 0a59e0cb08.
Reason for revert: Still causing UBSAN issues:
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10729
Original change's description:
> Reland^2 "[parser] Introduce UnoptimizedCompileFlags"
>
> This is a reland of d91679bf3a
> which was a reland of d91679bf3a
>
> Fixes missing initialization of ParserBase::allow_eval_cache_
>
> Original change's description:
> > [parser] Introduce UnoptimizedCompileFlags
> >
> > UnoptimizedCompileFlags defines the input flags shared between parse and
> > compile (currently parse-only). It is set initially with some values, and
> > is immutable after being passed to ParseInfo (ParseInfo still has getters
> > for the fields, but no setters).
> >
> > Since a few of the existing flags were output flags, ParseInfo now has a
> > new output_flags field, which will eventually migrate to a ParseOutputs
> > structure.
> >
> > Bug: v8:10314
> > Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#66782}
>
> TBR=rmcilroy@chromium.org,ulan@chromium.org,szuend@chromium.org
>
> Bug: v8:10314
> Change-Id: I470de963bdedad31fe7dd149c610f9a89bffa162
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157030
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67245}
TBR=rmcilroy@chromium.org,leszeks@chromium.org
Change-Id: I1c5f58cc5608217a149b04aa6f50bb3d7606c26d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157657
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67250}
This reverts commit 4158af83db.
Reason for revert: causing UBSAN failures:
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10729?
Original change's description:
> [turbofan] Fix bug in Number.Min/Max typings
>
> They try to be very precise about when the result can be -0,
> but do so incorrectly. I'm changing the code to just do the
> simple thing instead. Let's see how that affects performance.
>
> Bug: chromium:1072171
> Change-Id: I9737a84aa19d06685af5b7bca541e348dc37cca8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157028
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67246}
TBR=neis@chromium.org,tebbi@chromium.org
Change-Id: I0d9b312e27f5a8bbbebeccdc9819fa94f10af139
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1072171
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157646
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67249}
They try to be very precise about when the result can be -0,
but do so incorrectly. I'm changing the code to just do the
simple thing instead. Let's see how that affects performance.
Bug: chromium:1072171
Change-Id: I9737a84aa19d06685af5b7bca541e348dc37cca8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157028
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67246}
This is a reland of d91679bf3a
which was a reland of d91679bf3a
Fixes missing initialization of ParserBase::allow_eval_cache_
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
TBR=rmcilroy@chromium.org,ulan@chromium.org,szuend@chromium.org
Bug: v8:10314
Change-Id: I470de963bdedad31fe7dd149c610f9a89bffa162
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157030
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67245}
This reverts commit 146f5375da.
Reason for revert: UBSan (https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/10726?)
Original change's description:
> Reland "[parser] Introduce UnoptimizedCompileFlags"
>
> This is a reland of d91679bf3a
>
> This reland adds initializers for the output flags.
>
> Original change's description:
> > [parser] Introduce UnoptimizedCompileFlags
> >
> > UnoptimizedCompileFlags defines the input flags shared between parse and
> > compile (currently parse-only). It is set initially with some values, and
> > is immutable after being passed to ParseInfo (ParseInfo still has getters
> > for the fields, but no setters).
> >
> > Since a few of the existing flags were output flags, ParseInfo now has a
> > new output_flags field, which will eventually migrate to a ParseOutputs
> > structure.
> >
> > Bug: v8:10314
> > Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#66782}
>
> Bug: v8:10314
> Change-Id: Ibade9658d99fa928709b3d56762c4c002ffff0dc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111213
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67241}
TBR=ulan@chromium.org,rmcilroy@chromium.org,leszeks@chromium.org,szuend@chromium.org
Change-Id: I204eb9e4d0a5bfaeeefeb6b0f1c82856b57cb175
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2157029
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67242}
This is a reland of d91679bf3a
This reland adds initializers for the output flags.
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
Bug: v8:10314
Change-Id: Ibade9658d99fa928709b3d56762c4c002ffff0dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111213
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67241}
Deserializer can trigger OOB read in the marking bitmap inside the
RegisterDeserializedObjectsForBlackAllocation function. This happens
for example if an internalized string is deserialized as the last object
on a page and is the turned into a thin-string leaving a one-word filler
at the end of the page. In such a case IsBlack(filler) will try to fetch
a cell outside the marking bitmap.
The fix is to increase the size of the marking bitmap by one cell, so
that it is always safe to query markbits of any object on a page.
Bug: chromium:978156
Change-Id: If3c74e4f97d2caeb3c3f37a4147f38dea5f0e5a8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2152838
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67223}
{StaticCharVector}, according to its name, should return a
{Vector<const char>}. For getting a {Vector<const uint8_t>}, the method
should be called {StaticOneByteVector}, analog to the
{OneByteVector} methods that already exist.
Also, {StaticCharVector} is constexpr, but {StaticOneByteVector} cannot
be, since it contains a {reinterpret_cast}. The same holds for
{Vector::cast} in general.
This CL
- changes the return type of {StaticCharVector} to be
{Vector<const char>},
- introduces a new {StaticOneByteVector} which returns
{Vector<const uint8_t>},
- fixes constexpr annotations at various methods returning {Vector}s,
- refactors users of {StaticCharVector} to either use
{StaticOneByteVector} instead, or work on {char} if that makes more
sense.
R=leszeks@chromium.org
Bug: v8:10426
Change-Id: I71e336097e41ad30f982aa6344ca3d67b3a01fe3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2154196
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67213}
Test some constexpr factories. StaticCharVector is not actually
constexpr, this will be fixed in a follow-up CL.
R=leszeks@chromium.org
Bug: v8:10426
Change-Id: I16fdf79cd7d4b3f54d7cf73e15bdff2306810f06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2154192
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67210}
These opcodes are not officially specified yet, they are defined
in the "prototype implementation spec" at https://bit.ly/3cWcm6Q.
Drive-by: drop a unit test whose entire coverage can be provided
by a compile-time check.
Bug: v8:7748
Change-Id: Icefa6dd321802c8a01c4561178b9d21eca1fbaa3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2152841
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67208}
This changelist adds to the GDB stub (in class wasm::gdb_server::Target) the
logic to decode and execute GDB-remote commands and to format response packets
to be sent back to the debugger.
Here most of the commands still act as a NOOP; the actual implementation
requires interactions with the Wasm engine and will be implemented in the next
CL of this series.
Build with: v8_enable_wasm_gdb_remote_debugging = true
Run with: --wasm-gdb-remote
Bug: chromium:1010467
Change-Id: Icfa63be9e1eaa657c05876d0d4e86927e0885b90
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1938466
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67200}
This changelist adds the logic to format, decode, sends and receive packets in
the format specified by the GDB-remote protocol
(https://sourceware.org/gdb/onlinedocs/gdb/Overview.html#Overview).
Build with: v8_enable_wasm_gdb_remote_debugging = true
Run with: --wasm-gdb-remote
Bug: chromium:1010467
Change-Id: Ibc9c6713c561d06847b472fab591c208c193199f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1929409
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67196}
SIMD opcodes consist of the prefix byte, then an LEB128 encoded int. We
were decoding this incorrectly as a fixed uint8. This fixes the decoder
to properly handle multi bytes.
In some cases, the multi byte logic is applied to all prefixed opcodes.
This is not a problem, since for values < 0x80, the LEB encoding is a
single byte, and decodes to the same int. If the prefix opcode has
instructions with index >= 0x80, it would be required to be LEB128
encoded anyway.
There are a bunch of trivial changes to test-run-wasm-simd, to change
the macro from BUILD to BUILD_V, the former only works for single byte
opcodes, the latter is a new template-based macro that correct handles
multi-byte opcodes. The only unchanged test is the shuffle fuzzer test,
which builds its own sequence of bytes without using the BUILD macro.
Bug: v8:10258
Change-Id: Ie7377e899a7eab97ecf28176fd908babc08d0f19
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2118476
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67186}
This adds support for custom weak callbacks through static callbacks and
instance methods.
Bug: chromium:1056170
Change-Id: Ie4bd32539e0d933b192f07edb2d45e0070c2128d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2148784
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67167}
When memory.grow was executed concurrently on multiple threads a data
race could happen such that two memory.grow operations result in the
same return value. With this CL the return value of memory.grow is
unique, given that memory.grow actually grows the memory.
As a concrete example, assume a shared WebAssembly memory initially has
a size of 100. Assume two threads call memory.grow concurrently with a
parameter `10`. Then with the existing code, memory would grow correctly
to a size of 120, but the data race may cause both memory.grow
operations to return 100. With the change in this CL one memory.grow
operation would return 100, the other would return 110.
R=gdeepti@chromium.orgCC=rreverser@google.com
Bug: chromium:1067621
Change-Id: Ib22b5135714a56799e0818ccb39e5dce327e5f8e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2144113
Reviewed-by: Ben Smith <binji@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67135}
AIX default page size is 4096 bytes hence
PlatformUsesGuardPages returns true. Power Linux however
has a default page size of 65536 bytes and the above function
is expected to return false. More info is available
at https://crrev.com/c/2144060.
Change-Id: I35a13ada5bd1b18729cfa039a0bc699a409fbc2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2147634
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#67134}
A few notes:
1) Oilpan is a generic library, meaning that it can work with arbitrary
user types. The library is split in type-aware (include/) and
type-erased (src/) parts. The former comprises a lot of code that still
needs to be defended with dchecks;
2) Macros are prefixed with CPPGC_, so that they don't clash in the user
code with similar macros from other libraries;
3) The macros simply forward requests to V8 so that dcheck handlers can
be configured uniformly;
4) The CL doesn't contain CHECK_EQ and friends, but they can be added
later if needed.
Bug: chromium:1056170
Change-Id: I68e6f663247705233eaf030384164d81e53071e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2148774
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67129}
This is a port of src/components/gc that was added recently.
Differences:
- Added back bucketing to the page pool, as that guarantees that
arenas used for specific types do not have their pages used by other
arenas.
- Replaced base::flat_map with std::map. This may cause performance
regressions when using PageMemoryRegionTree in hot paths. A
vector-like representation may be used to fix such a regression
This reverts commit a056cea51e.
Bug: chromium:1056170
Change-Id: Iffb8b0d91c8cca1815d7a1cda9486e7716aea75f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2144060
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67117}
Change the unittests Isolate mixin to create one Isolate per test,
rather than one per test suite. We usually run these tests independently
in separate processes anyway, so this shouldn't affect normal test
execution, but it will avoid Isolate state leaking across tests when
running the unittests binary directly.
Take this opportunity to also clean up the mixins, changing counter
initialization and forcing pointer compression into template traits.
Bug: v8:10142
Change-Id: If92046f9c6f2056252d099faed04d97844ef7319
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2143818
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67110}
Provides the infrastructure to register weak callbacks for
WeakMember<T> through visitor. The WeakCallbackInfo broker is used to
query objects for liveness. In a future CL the same broker object is
passed to custom weak callbacks.
Change-Id: I8b5a66354e0e457521989d40ae64a9558c339503
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2142265
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67109}
This reverts commit 3e1c70402e.
Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20concurrent%20marking/12665
Original change's description:
> Reland "cppgc: Add page memory allocation backend"
>
> This is a port of src/components/gc that was added recently.
>
> Differences:
> - Added back bucketing to the page pool, as that guarantees that
> arenas used for specific types do not have their pages used by other
> arenas.
> - Replaced base::flat_map with std::map. This may cause performance
> regressions when using PageMemoryRegionTree in hot paths. A
> vector-like representation may be used to fix such a regression
>
> This reverts commit 656c68a781.
>
> Bug: chromium:1056170
> Change-Id: I638183c944255ebcaab47d2b94b1980d54479746
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2143814
> Reviewed-by: Maya Lekova <mslekova@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67080}
TBR=mlippautz@chromium.org,mslekova@chromium.org
Change-Id: I04b048dd979c32e9275c972307796d5f75865037
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2144114
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67084}
This is a port of src/components/gc that was added recently.
Differences:
- Added back bucketing to the page pool, as that guarantees that
arenas used for specific types do not have their pages used by other
arenas.
- Replaced base::flat_map with std::map. This may cause performance
regressions when using PageMemoryRegionTree in hot paths. A
vector-like representation may be used to fix such a regression
This reverts commit 656c68a781.
Bug: chromium:1056170
Change-Id: I638183c944255ebcaab47d2b94b1980d54479746
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2143814
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67080}
GetHeapFromPayload returned the page header address instead of the
value of the first field of the header.
Bug: chromium:1056170
Change-Id: I4de5be975accced32460d6fab91543e6a5b07ba0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2143825
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67079}
Fix off-thread space merging unit tests, by
a) Doing a GC on each test teardown (avoiding leaking GC state between
tests), and
b) Removing the AllocationStep when merging, which could cause a
deadlock if incremental marking triggered a free-list refill.
Bug: v8:10142
Change-Id: Id2670115f96ab3b13613ea357bd44a639d0151e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2142260
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67077}
This CL provides a basic allocator that allocates normal-sized objects
on pages without ever reusing them. This allows for already using the
backref from page to heap which is used in some critical places
(pre-finalizers, write barrier, Persistent).
Bug: chromium:1056170
Change-Id: Ifada9b7e984827906c267d1a3a521576587feaeb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2141736
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67076}
This reverts commit d4056c61d5.
Reason for revert: Fails on GCC, please check https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/6184
Original change's description:
> cppgc: Add page memory allocation backend
>
> This is a port of src/components/gc that was added recently.
>
> Differences:
> - Added back bucketing to the page pool, as that guarantees that
> arenas used for specific types do not have their pages used by other
> arenas.
> - Replaced base::flat_map with std::map. This may cause performance
> regressions when using PageMemoryRegionTree in hot paths. A
> vector-like representation may be used to fix such a regression
>
> Bug: chromium:1056170
> Change-Id: I03e3abe55faf7bb50c8011dafc23396889bf66db
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139586
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67073}
TBR=ulan@chromium.org,hpayer@chromium.org,mlippautz@chromium.org,bikineev@chromium.org,omerkatz@chromium.org
Change-Id: I1e421898bb8a08f32d8eb2355ed547e0ee38b429
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2140949
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67074}
This is a port of src/components/gc that was added recently.
Differences:
- Added back bucketing to the page pool, as that guarantees that
arenas used for specific types do not have their pages used by other
arenas.
- Replaced base::flat_map with std::map. This may cause performance
regressions when using PageMemoryRegionTree in hot paths. A
vector-like representation may be used to fix such a regression
Bug: chromium:1056170
Change-Id: I03e3abe55faf7bb50c8011dafc23396889bf66db
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139586
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67073}
This change comprises a few tiny changes wrt Member:
1) Move member policies to a separate file so that some of them
(CheckingPolicy) can be reused by Persistent;
2) SFINAE out incompatible pointers from heterogeneous ctor/asgnmt;
3) Rename kMemberSentinel to kSentinelPointer.
Bug: chromium:1056170
Change-Id: I4482998e6ba61005a5d0861dcae9fab2aa43702c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139587
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67061}
Headers containing only implementation details are better to stay in a
separate dir to indicate the user that they shouldn't be included.
Bug: chromium:1056170
Change-Id: I10f84ddf709b146396aadc820ec33bc6a49b2dac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139585
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67050}
Neither Member, nor GarbageCollected objects (and friends) should be
allocated on the stack. Create a special test fixture that allows for
writing idiomatic unit tests that depend on allocation but do not pull
in garbage collection.
Bug: chromium:1056170
Change-Id: I4118201a51658f7247412434a867d35c91299439
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139583
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67046}
This CL adds the necessary traits to dispatch from Member through a
visitor implementation for GarabgeCollected and GarbageCollectedMixin.
Bug: chromium:1056170
Change-Id: I12680335044aaa842639fb5e8f9a3ac61587f51a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2138431
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67041}
Assumes that (is_clang = false && is_win) => Windows native (MSVC).
Cross-compile builds will use clang and not the native tools and thus
not fall into this category.
This CL adds x86 and x64 MASM trampolines that can be used with the
native Windows toolchain (ml.exe, ml64.exe), when using is_clang =
false.
This reverts commit 8e4a5e973e.
Bug: chromium:1056170
Change-Id: I7204f15898ec5eddcc5892d4d08266a69d84ab85
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139211
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67036}
With this change we support allocation of objects and keeping them
alive via conservative stack scan.
This reverts commit 2b047a58f8.
Change-Id: Iac1913e7ef0556c28399509a160777a89e60150c
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2137402
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67016}
With this change we support allocation of objects and keeping them alive via
conservative stack scan.
Change-Id: Id94d7ced503ad0b1378643e0c13c2a8b65ad2327
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135729
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67008}
Effect-control-linearizer will update a basic block to connect it
directly to the end node if it has an Unreachable node. Usually the
block would already have been connected directly to end (via a Throw
node) already, however in some cases it can be connected indirectly
(via a branch, where both end in a throw node).
If this happens, and the Effect-control-linearizer is maintaining the
schedule (e.g., for TurboProp), it will cause the end block to have
unreachable predecessor blocks, which can cause issues with the
register allocator.
To fix this, have the BasicBlockUpdater remove all successor blocks
from the schedule, when they become Unreachable. Also add some tests
to cover this in effect-control-linearizer-unittests.
BUG=v8:10332,v8:9684
Change-Id: Ibce140e6d1f61751a86247e6f8c36075723a1e55
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2120537
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66994}
We cannot rely on the clang compiler to generate the trampoline entry
and the right mangling because `__attribute__((naked))` does not
prevent clang from generating TSAN function entry stub
(`__tsan_func_entry`). Even with `__attribute__((no_sanitize_thread)`
annotation clang generates the entry stub.
Upstream bug: https://bugs.llvm.org/show_bug.cgi?id=45400
Bug: chromium:1056170
Change-Id: I7a2063d7d205ee071e6a41ce4d9cb2d8d6423987
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2132797
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66976}
Use inline asm to generate the x64 PushAllRegistersAndIterateStack
which is the trampoline for conservative stack scanning. Keep the
function definition as C code to allow clang to generate the correct
mangling for each platform.
This approach has the benefit that it immediately works for all
platforms that support clang.
Bug: chromium:1056170
Change-Id: Ic7a1c1b57e67ae1442bd8bda4e55d89112facfc7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2132787
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66958}
The tests using the recursive function were broken on non-clang builds
as GCC is able to agressively the function in question and proof that
parameters are not actually needed.
Bug: chromium:1056170
Change-Id: Iacbff766ca9d300c9ae5d16394e205b1883609eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2130274
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66952}
Pure refactoring. The re-organization allows to easily
add more platforms.
Bug: chromium:1056170
Change-Id: Ia191c37a1dabff6952414c5314beeeae881713b7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2129636
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66924}
This tests that the stack doesn't get misaligned after asm trampolines.
x86 and x64 psABI requires the stack to be 16 bytes aligned.
Bug: chromium:1056170
Change-Id: I73e7100806c6ecf3f5e884a121a15bcc384d8011
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2128048
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66922}
A previous CL made the mode an explicit argument but failed to
keep SimplifiedLowering from overriding it.
Moreover, CheckedUint64Bounds so far didn't support the two modes.
Change-Id: I01d8bf90fca77940fbeb428da57608a59f812c75
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2124833
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66921}
Adds support for conservative stack scanning on x64. The trampolines
saving callee-saved registers are compiled using clang (non-Windows)
and MASM (Windows). This is using the default toolchain for assembly
in Chromium/V8.
This differs from Oilpan in Chromium where x86 and x64 are compiled
using NASM [1]. V8 does not yet require this dependency and building
the trampolines natively avoids it. (NASM also requires separate
blocks for x64 Windows and non-Windows.) On non-x86/x64 platforms
Chromium also uses clang, so there's little benefit in keeping the
dependency.
The trampolines are tested when building with clang.
Other platforms follow in separate CLs.
[1] https://source.chromium.org/chromium/chromium/src/+/master:third_party/blink/renderer/platform/heap/asm/SaveRegisters_x86.asm
Change-Id: Ice2e23e44391aa94147abe75ee0b5afac458b8f8
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2124319
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66913}
iOS does not support death tests.
Bug: v8:10360
Change-Id: Ia86553d53eee811e5521c093fd034115a9d01750
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2128046
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66912}
In order to implement CodeEntry deallocation when profiles are stopped,
we need to be able to effectively deallocate strings. Introduce a simple
imperative refcounting API using the existing HashMap slots for
StringsStorage to enable this.
Design doc: https://docs.google.com/document/d/1OTwlBnAMXZEaOICtuz16c01QnkPPdqHBoHpfGwnk5SY/edit
Bug: chromium:956688
Change-Id: Iaa1142925f40aa66c064d011b2a0630de72037fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2121575
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#66911}
This CL adds basic infrastructure for:
- MakeGarbageCollected
- GarbageCollected and related type traits
- Heap (API / internal)
- Basic allocation based on malloc
- CollectGarbage without marking
This allows for allocation and reclamation through an explicit GC
call. No objects are held alive from any source (stack, globals,
refs), yet.
The exact wiring of platform is future work.
Change-Id: I81b7c0ba7b525188f8c0bf9de3b7af35d34322af
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2120538
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66887}
std::atomic loads are marked as nodiscard on MSVC. Fix the warning by
feeding the load into the USE() macro.
Bug: chromium:1056170
Change-Id: I72ca42d42d268c4b961d96618250229a53709472
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2120543
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66866}
This reverts commit 0c72c71900.
Reason for revert: Wasm code size increase because not all pipelines use CommonOperatorReducer
Original change's description:
> Move branch inversion on ==0 into platform-agnostic reducer
>
> This change is based on a discussion from
> https://crrev.com/c/v8/v8/+/2053769/4/src/compiler/machine-operator-reducer.cc#1696
> wherein Tobias suggested moving the folding away of ==0 operations out
> of the platform-specific instruction selectors and into the
> MachineOperatorReducer. I noticed that CommonOperatorReducer already
> handles some very similar cases, so I have tried putting the ==0 folding
> into CommonOperatorReducer instead. I'm happy to move it into
> MachineOperatorReducer if that's better; I still don't have a very good
> understanding of how roles are separated among reducers.
>
> Change-Id: Ia0285bd9fafeef29d87cc88654bd6d355d467e8f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2076498
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66688}
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:1061767
Change-Id: Id1fdfb38357eb514d92ed3be0a683f077202faa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2117789
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66862}
This adds HeapObjectHeader, a meta object that is put in front of
every managed object. HeapObjectHeader provides accessors for:
1. GCInfoIndex
2. In construction bit
3. size
4. Mark bit
Meta info is distributed among two uint16_t fields as (1.,2.) and
(3.,4.). This is convenient as the non-bit accessors (size,
GCInfoIndex) are constant during marking.
Object layout see heap-object-header.h.
Note: The current implementation does not bypass ASAN poisoning and
assumes an unpoisoned header whenever performing an access.
Bug: chromium:1056170
Change-Id: I753f15467ed5c2b22b47e64d3aa5a3c1baddf8e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116031
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66861}
For some input types containing -0 but not +0, the result type of
NumberMin and NumberMax would unnecessarily include +0. However, for
some larger inputs, the result type would not include the spurious +0,
thus breaking monotonicity.
The CL fixes this and addresses a TODO as well.
Bug: chromium:1063661
Change-Id: Icd56d6102fbea12a2d96aa063a803b1052c714b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116199
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66854}
Add LocalHandleScope to allow for local handles in LocalHeaps
(background threads). This class is similar to HandleScope which still
needs to be used on the main thread. When performing a GC, the main
thread halts all background threads at a safepoint such that it can
safely iterate their roots.
Bug: v8:10315
Change-Id: Id8f5d54cc2535e004081ccdef15dc03a39b2d0f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111218
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66853}
GCInfo and its related infrastructure is used to record information
about types. Currently, we store finalization and vtable information.
Future changes will introduce naming and tracing, similar to Oilpan in
Blink.
Information is stored in a process-wide global table that is
maintained at runtime. For static builds such information can be
recorded in the binary without the runtime overhead which is future
work.
This ports `third_party/blink/renderer/platform/heap/gc_info.{h,cc}`
on a semantic level. In addition to adjusting to V8's needs, we also
re-commit the already filled parts of the info table as read-only when
possible, making it harder to override type information.
Bug: chromium:1056170
Change-Id: Ib01eb24e6f8a94a4a647efde7af37689f8c20ba2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111214
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66847}
"By my deeds I honor him. V8."
- Add basic build files for library and unittests.
- Integrate unittests also in existing V8 unittests for simplicity.
The CL also adds FinalizerTrait and unittests to allow building a
testing target that executes code.
FinalizerTrait is used to determine how managed C++ types are
finalized. The trait should not be overridable by users but needs to
be exposed on API-level to avoid including library-internal headers.
Bug: chromium:1056170
Change-Id: I64d91053410a17a7835e50547f58990625d2da28
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2108549
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66834}
Now that it is implicit in function entry and loop iteration, there is
no need for an explicit bytecode.
Also updated tests that used explicit bytecodes.
Bug: v8:10149, v8:9960
Change-Id: I3ca582f276829bd54feb35e6d4ea656a32efbd54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2093507
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66811}
Since now the IterationBody StackChecks are implicit within JumpLoops,
we are able to eagerly deopt in them. If we do that, whenever we advance
to the next bytecode we don't have to advance to the next literal
bytecode, but instead "advance" in the sense of doing the JumpLoop.
Adding tests that test this advancing for wide and extra wide JumpLoops.
Also, marking JumpLoop as needing source positions since now it has
the ability of causing an interrupt.
Bug: v8:10149, v8:9960
Fixes: v8:10149
Change-Id: Ib0d9efdfb379e0dfbba7a7f67cba9262668813b0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2064226
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66809}
This reverts commit d91679bf3a.
Reason for revert: Seems to cause UBSan errors
Original change's description:
> [parser] Introduce UnoptimizedCompileFlags
>
> UnoptimizedCompileFlags defines the input flags shared between parse and
> compile (currently parse-only). It is set initially with some values, and
> is immutable after being passed to ParseInfo (ParseInfo still has getters
> for the fields, but no setters).
>
> Since a few of the existing flags were output flags, ParseInfo now has a
> new output_flags field, which will eventually migrate to a ParseOutputs
> structure.
>
> Bug: v8:10314
> Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66782}
TBR=ulan@chromium.org,rmcilroy@chromium.org,leszeks@chromium.org,szuend@chromium.org
Change-Id: Ica139e8862e00cd0560638a0236bbaccd7b2188c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2108548
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66783}
UnoptimizedCompileFlags defines the input flags shared between parse and
compile (currently parse-only). It is set initially with some values, and
is immutable after being passed to ParseInfo (ParseInfo still has getters
for the fields, but no setters).
Since a few of the existing flags were output flags, ParseInfo now has a
new output_flags field, which will eventually migrate to a ParseOutputs
structure.
Bug: v8:10314
Change-Id: If3890a5fad883bca80a97bf9dfe44d91797dc286
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096580
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66782}
We don't ever want a node's type to become less precise.
Also move a part of JSTypedLowering::ReduceJSStrictEqual that
can be expressed solely in terms of types into the typer, where
it generalizes an existing case.
Change-Id: I37c58fed48f606f6fe34e98e5f066434e50cb6c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2106204
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66763}
- Allow type expression for abstract type supertypes.
For consistency, and ease of implementation, also allow this for enums.
- Allow subtyping of structs. This requires changing all places where we
checked for struct types and instead check if we have a subtype of a
struct type.
- This allows defining two subtypes of the Reference<T> struct for
mutable and constant references. Mutable references are a subtype of
constant references.
- &T desugars to MutableReference<T>
const &T desugars to ConstReference<T>
- A const field of a class produces a constant reference.
A const field of a mutable reference to a struct is const.
A mutable field of a const reference to a struct is const.
- It is possible to assign a new struct value to a mutable reference to
a struct, even if the struct contains const fields. This is analogous
to allowing assignments of let-bound structs with constant fields.
Not in this CL:
- A notion of const slices.
- Applying const to appropriate class fields.
Bug: v8:7793
Change-Id: I6e7b09d44f54db25f8bf812be5f3b554b80414e0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096615
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66759}
Generate a BTI instruction at each target of an indirect branch
(BR/BLR). An indirect branch that doesn't jump to a BTI instruction
will generate an exception on a BTI-enabled core. On cores that do
not support the BTI extension, the BTI instruction is a NOP.
Targets of indirect branch instructions include, among other things,
function entrypoints, exception handlers and jump tables. Lazy deopt
exits can potentially be reached through an indirect branch when an
exception is thrown, so they also get an additional BTI instruction.
Bug: v8:10026
Change-Id: I0ebf51071f1b604f60f524096e013dfd64fcd7ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1967315
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66751}
Track list of all local heaps in the Safepoint class instead of the
Heap.
Bug: v8:10315
Change-Id: I1a1c847502ab5e8f368d4cc12d3cbaf3672af7cc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2106197
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66745}
This is a reland of 2c834c5364,
in which node replacement was too aggressive.
Original change's description:
> [turbofan] Clean up ConstantFoldingReducer
>
> Change-Id: Iaf7f83cc157a6f6680da8933560347f7f3503d56
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2098736
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66706}
Change-Id: I5d306092dde4119629af4c5e7e424a0e9a14310d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2106193
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66742}
Add safepoint mechanism to stop concurrent threads and bring them to a
safepoint. Threads are stopped before the safepoint and after e.g. the
GC resumed again. Each thread needs to be stopped in a safepoint, such
that all roots can be iterated safely.
Running threads need to be cooperative and are required to perform
regular safepoint polls.
The last version of this CL was reverted because safepoint_requested_
wasn't initialized (see https://crrev.com/c/2105634).
Bug: v8:10315
Change-Id: I6ef244c0fb31c178589b5e3d1c62687a8dd65768
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105635
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66732}
This reverts commit c84963eaa7.
Reason for revert: Fails on msan: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/31376
Original change's description:
> [heap] Introduce safepoint mechanism
>
> Add safepoint mechanism to stop concurrent threads and bring them to a
> safepoint. Threads are stopped before the safepoint and after e.g. the
> GC resumed again. Each thread needs to be stopped in a safepoint, such
> that all roots can be iterated safely.
>
> Running threads need to be cooperative and are required to perform
> regular safepoint polls.
>
> Bug: v8:10315
> Change-Id: I47f07e7d2ef5bc5adbba6b9e8e79a1f0f45b97ad
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2102578
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66727}
TBR=ulan@chromium.org,dinfuehr@chromium.org
Change-Id: If11281b2b9fc622b91261417b202676f23f60b50
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10315
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105634
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66729}
Add safepoint mechanism to stop concurrent threads and bring them to a
safepoint. Threads are stopped before the safepoint and after e.g. the
GC resumed again. Each thread needs to be stopped in a safepoint, such
that all roots can be iterated safely.
Running threads need to be cooperative and are required to perform
regular safepoint polls.
Bug: v8:10315
Change-Id: I47f07e7d2ef5bc5adbba6b9e8e79a1f0f45b97ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2102578
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66727}
This reverts commit 2c834c5364.
Reason for revert: several clusterfuzz issues, e.g. 1061805
Original change's description:
> [turbofan] Clean up ConstantFoldingReducer
>
> Change-Id: Iaf7f83cc157a6f6680da8933560347f7f3503d56
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2098736
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66706}
TBR=neis@chromium.org,tebbi@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Change-Id: I6e5b655bb465087a50ebaa2088795c6f920c2e51
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2104892
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66717}
This change is based on a discussion from
https://crrev.com/c/v8/v8/+/2053769/4/src/compiler/machine-operator-reducer.cc#1696
wherein Tobias suggested moving the folding away of ==0 operations out
of the platform-specific instruction selectors and into the
MachineOperatorReducer. I noticed that CommonOperatorReducer already
handles some very similar cases, so I have tried putting the ==0 folding
into CommonOperatorReducer instead. I'm happy to move it into
MachineOperatorReducer if that's better; I still don't have a very good
understanding of how roles are separated among reducers.
Change-Id: Ia0285bd9fafeef29d87cc88654bd6d355d467e8f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2076498
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66688}
In preparation for adding reference types, which need an additional
parameter to indicate the referenced type.
Bug: v8:7748
Change-Id: If4023f3d9c7f42ed603b69c43356d2e8b81a0daa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091471
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66687}
... such that we have only a single representation for special
constants such as undefined, namely the corresponding bitset.
With this CL the following property holds:
t1.IsSingleton() /\ t2.Is(t1) => t1.Is(t2)
Also clean up the Type interface and improve test coverage a little.
Change-Id: I074e20047c92e2c8215c2d438f2627f4ffdbc409
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096631
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66684}
This CL is a step towards making StackChecks implicit. In a follow-up CL
said StackChecks will become implicit within JumpLoops.
Cq-Include-Trybots: luci.chromium.try:linux-rel
Bug: v8:10149, v8:9960
Change-Id: I5ae247be3f7a58ccdf86398cace30724715767a8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2062391
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66668}
Instead of directly using the Heap class concurrent threads will use the
LocalHeap class for all heap operations.
Bug: v8:10315
Change-Id: Ie007abb5b914af7f2507c9e790f34baacbcdf588
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096620
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66663}
This CL merges nested loops that share the same header offset with its
parent loop, by not emitting JumpLoop bytecode for these inner loops.
Instead, we generate a Jump to its parent's JumpToHeader (which in
turn can be a JumpLoop or another Jump to its parent's JumpToHeader).
Originally, every loop had a unique first Bytecode to jump to. Since
IterationBody StackChecks are going to become implicit this will no
longer be the case.
As a note, this CL just sets the foundation that the follow-up CLs
will build on top of. Since we have explicit StackChecks, and they
are at the beginning of loops we do not have nested loops as of now.
Bug: v8:10149, v8:9960
Change-Id: I6daee4d2c6d6216f022228c87c4aa74e163997b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2062390
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66626}
String::NewFromLiteral is a templated function that takes a char[N]
argument that can be used as an alternative to String::NewFromUtf8 and
returns a Local<String> rather than a MaybeLocal<String> reducing the
number of ToLocalChecked() or other checks.
Since the string length is known at compile time, it can statically
assert that the length is less than String::kMaxLength, which means that
it can never fail at runtime.
This also converts all found uses of NewFromUtf8 taking a string literal
or a variable initialized from a string literal to use the new API. In
some cases the types of stored string literals are changed from const
char* to const char[] to ensure the size is retained.
This API does introduce a small difference compared to NewFromUtf8. For
a case like "abc\0def", NewFromUtf8 (using length -1 to infer length)
would treat this as a 3 character string, whereas the new API will treat
it as a 7 character string.
As a drive-by fix, this also fixes all redundant uses of
v8::NewStringType::kNormal when passed to any of the String::New*
functions.
Change-Id: Id96a44bc068d9c4eaa634aea688e024675a0e5b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2089935
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66622}
This fixes a non-determinism issue caused by the cache being full.
Depending on the non-deterministic value of the handles in HeapConstant
nodes, different cache entries would be overwritten in this case.
The old implementation of NodeCache had a fixed limit, overwriting
entries when the cache is full. This behavior didn't really make sense,
but the hand-written hash map implementation couldn't handle arbitrary
numbers of hash collisions, so removing the limit wasn't an option either.
Thus this CL just replaces the custom hash map with a normal
std::unordered_map, that is, a ZoneUnorderedMap.
Bug: chromium:1046815
Change-Id: I95269f2b1068eb9dfe3ee2ab5cca1cb460bc8fa3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2087405
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66592}
Optimizes InstructionSelector::AddInputsToFrameStateDescriptor by
taking advantage of SparseInputMask data structure to more quickly
handle empty inputs and insert all the OptimizedOut entries in one go.
The number of empty inputs is now determined using CountTrailingZeros
rather than iterating over them one at a time.
Gives a 9% improvement to SelectInstructions runtime call stat for
Octane in turboprop.
Bug: v8:10051
Change-Id: Ib13d6f9644b4c89ba0546a19fe0ed623d69fec99
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2037443
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66591}
This is a reland of 9325397812
Original change's description:
> Use context of then function for PromiseResolveThenableJob
>
> When a microtask is executed, we need to use an appropriate,
> non-detached Context for its execution. Currently with
> PromiseResolveThenableJobs [1], the Context used is always drawn from
> the realm of the Promise constructor being used. This may cause
> non-intuitive behavior, such as in the following case:
>
> const DeadPromise = iframe.contentWindow.Promise;
> const p = DeadPromise.resolve({
> then() {
> return { success: true };
> }
> });
> p.then(result => { console.log(result); });
>
> // Some time later, but synchronously...
> iframe.src = "http://example.com"; // navigate away.
> // DeadPromise's Context is detached state now.
> // p never gets resolved, and its reaction handler never gets called.
>
> To fix this behavior, when PromiseResolveThenableJob is being queued up,
> the `then` method of the thenable should be used to determine the
> context of the resultant microtask. Doing so aligns with Firefox, and
> also with the latest HTML spec [2][3].
>
> This change is analogous to CL 1465902, which uses the realm of the
> reaction handlers to determine the Context PromiseReactionJobs run in.
>
> [1]: https://tc39.es/ecma262/#sec-promiseresolvethenablejob
> [2]: https://html.spec.whatwg.org/C/#enqueuejob(queuename,-job,-arguments)
> [3]: https://github.com/whatwg/html/pull/5212
>
> Bug: v8:10200
> Change-Id: I2312788eeea0f9e870c13cf3cb5730a87d15609e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071624
> Commit-Queue: Timothy Gu <timothygu@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Shu-yu Guo <syg@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66507}
Bug: v8:10200
Change-Id: I5af003a06c60b0c8cd19de47f847a947d40d046c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2082109
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Timothy Gu <timothygu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66586}
This is a reland of 25d16574f8
Changes from original: replaced slow test with fast test
Original change's description:
> [runtime] Improve handling of enumeration index on global dictionary
>
> Bug: chromium:1056054
> Change-Id: Ie1f2da98bc54a2ad5189cbe2ee1686fe1ef7019a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2079035
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#66504}
Bug: chromium:1056054
Change-Id: I45b9a096b1e37bf1dc5e792f106cdfadd47fabf9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2080855
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#66535}
Remove OffThreadHandle, HandleOrOffThreadHandle, and HandleFor, and
make the OffThreadIsolate allocate "real" Handles. Rather than using
the main-thread Isolate's handle scopes, these off-thread Handles are
backed by a Zone, which is tied to the lifetime of the nearest
OffThreadHandleScope. Eventually, we'll likely want to merge the
implementation of OffThreadHandleScope and HandleScope, but currently
the latter is too tightly coupled to the main thread to do so.
Bug: chromium:1011762
Change-Id: I2a6361931fe3f90a7bef4cc28ee42155fa8d062f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071865
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66516}
This reverts commit 9325397812.
Reason for revert: Causing blink layout failures. See
https://ci.chromium.org/p/v8/builders/ci/V8%20Blink%20Linux%20Future/2684
Original change's description:
> Use context of then function for PromiseResolveThenableJob
>
> When a microtask is executed, we need to use an appropriate,
> non-detached Context for its execution. Currently with
> PromiseResolveThenableJobs [1], the Context used is always drawn from
> the realm of the Promise constructor being used. This may cause
> non-intuitive behavior, such as in the following case:
>
> const DeadPromise = iframe.contentWindow.Promise;
> const p = DeadPromise.resolve({
> then() {
> return { success: true };
> }
> });
> p.then(result => { console.log(result); });
>
> // Some time later, but synchronously...
> iframe.src = "http://example.com"; // navigate away.
> // DeadPromise's Context is detached state now.
> // p never gets resolved, and its reaction handler never gets called.
>
> To fix this behavior, when PromiseResolveThenableJob is being queued up,
> the `then` method of the thenable should be used to determine the
> context of the resultant microtask. Doing so aligns with Firefox, and
> also with the latest HTML spec [2][3].
>
> This change is analogous to CL 1465902, which uses the realm of the
> reaction handlers to determine the Context PromiseReactionJobs run in.
>
> [1]: https://tc39.es/ecma262/#sec-promiseresolvethenablejob
> [2]: https://html.spec.whatwg.org/C/#enqueuejob(queuename,-job,-arguments)
> [3]: https://github.com/whatwg/html/pull/5212
>
> Bug: v8:10200
> Change-Id: I2312788eeea0f9e870c13cf3cb5730a87d15609e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071624
> Commit-Queue: Timothy Gu <timothygu@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Shu-yu Guo <syg@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66507}
TBR=verwaest@chromium.org,timothygu@chromium.org,syg@chromium.org
Change-Id: I81737750f8b369567ba586c5a2cfb489836b7e74
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10200
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2081091
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66510}
When a microtask is executed, we need to use an appropriate,
non-detached Context for its execution. Currently with
PromiseResolveThenableJobs [1], the Context used is always drawn from
the realm of the Promise constructor being used. This may cause
non-intuitive behavior, such as in the following case:
const DeadPromise = iframe.contentWindow.Promise;
const p = DeadPromise.resolve({
then() {
return { success: true };
}
});
p.then(result => { console.log(result); });
// Some time later, but synchronously...
iframe.src = "http://example.com"; // navigate away.
// DeadPromise's Context is detached state now.
// p never gets resolved, and its reaction handler never gets called.
To fix this behavior, when PromiseResolveThenableJob is being queued up,
the `then` method of the thenable should be used to determine the
context of the resultant microtask. Doing so aligns with Firefox, and
also with the latest HTML spec [2][3].
This change is analogous to CL 1465902, which uses the realm of the
reaction handlers to determine the Context PromiseReactionJobs run in.
[1]: https://tc39.es/ecma262/#sec-promiseresolvethenablejob
[2]: https://html.spec.whatwg.org/C/#enqueuejob(queuename,-job,-arguments)
[3]: https://github.com/whatwg/html/pull/5212
Bug: v8:10200
Change-Id: I2312788eeea0f9e870c13cf3cb5730a87d15609e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071624
Commit-Queue: Timothy Gu <timothygu@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66507}
Previously, our Torque definition of JSArrayBuffer included only the
first two fields. This allowed access to those two fields, but was
somewhat confusing and obviously didn't let Torque code access the
other fields. This change:
- Completes the JSArrayBuffer layout definition;
- Moves the associated bitfield struct definition to Torque;
- Moves a couple of JSArrayBuffer macros to Torque;
- Adds a reducer case so that the code generated using these new macros
is not worse than what was generated previously.
Change-Id: Ib19c3ba789a33801fa9d0d064cd21d62a1e03e30
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2053769
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66503}
Port 6cd28b522a
Original Commit Message:
Added implementations for ia32, arm, arm64.
mips/mips64 will be committed in separate CL once the build is green
again in order not to stall this CL with the supported architectures.
compilation by using alternative temp register for x64.
macro assemblers.
R=ecmziegler@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N
Change-Id: Ib08e31dfa11f0254c7888ce17dd27e7d0154c752
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2078898
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#66490}
Added implementations for ia32, arm, arm64.
mips/mips64 will be committed in separate CL once the build is green
again in order not to stall this CL with the supported architectures.
Drive-by: Fixed issues with kScratchRegister being overwritten in case of RegExp
compilation by using alternative temp register for x64.
Drive-by: Added missing NoRootArrayScope to ia32, arm and arm64 RegExp
macro assemblers.
R=clemensb@chromium.orgR=petermarshall@chromium.orgR=jgruber@chromium.org
Bug: chromium:1045860
Change-Id: I716d852b9bf780ae7b8d61376c6505dd3af96a50
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071866
Commit-Queue: Emanuel Ziegler <ecmziegler@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66482}
Most function signatures are created once and never changed. Hence pass
them as const pointer. This makes it clear in function signatures that
these parameters will not be modified.
This also avoids a few ugly const_casts where we were passing pointers
to constexpr FunctionSigs via non-const pointers.
R=jkummerow@chromium.org
Bug: v8:10155
Change-Id: Ieb658ab5582bff276f76babdaf7ddb8f72bd4790
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2072739
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66478}
This reverts commit 4dc1fb4e04.
Reason for revert: the regression from the original change was likely due to unlucky factors like code alignment.
Original change's description:
> Revert "[torque] Support bitfield structs stored within Smis"
>
> This reverts commit e5e4ea962e.
>
> Reason for revert: mysterious performance regression chromium:1052756
>
> Original change's description:
> > [torque] Support bitfield structs stored within Smis
> >
> > This change moves the definition of the bits stored in DebugInfo::flags
> > to Torque, and updates the only Torque usage of that field to use more
> > natural syntax. This is intended as an example of common patterns found
> > in various other classes. Several supporting changes are required:
> >
> > 1. Add a new type representing a bitfield struct stored within a Smi. It
> > is currently called SmiTagged, but I'm open to suggestions.
> > 2. Add an enum-style output for Torque bitfield structs whose bitfields
> > occupy only one bit each.
> > 3. Add a new case to MachineOperatorReducer that makes the generated
> > code for IncBlockCounter match with what was generated before this
> > change.
> > 4. Add support for reporting these bitfields in the postmortem debugging
> > API. The format matches existing bitfields but with an offset value
> > that includes the SMI shift size.
> >
> > Bug: v8:7793
> > Change-Id: Icaecbe4a162da55d2d9a3a35a8ea85b285b2f1b7
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2028832
> > Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> > Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#66182}
>
> Bug: chromium:1052756, v8:7793
> Change-Id: I9e2897efbb6321124bf4952cf09de2f179f7310d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2062569
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66349}
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:1052756, v8:7793
Change-Id: I6087928aa14c8551ebd294513bd8d6ffa402a0d4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2070635
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#66465}
Added a type field to elements to distinguish anyref, funcref and
nullref elements and do a proper type checking at compile time as
the spec requires.
R=ahaas@chromium.org
Change-Id: I31be7aa1170439859ca7ec5e20aabb2720c290b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2069330
Commit-Queue: Emanuel Ziegler <ecmziegler@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66448}
This is a reland of 03d5a7ba9b
Nothing changed here compared to the original test. The tests on the
blink side were invalid, I fixed them in https://crrev.com/c/2066907.
Original change's description:
> [wasm] The name of a custom section can cause a validation error
>
> The WebAssembly spec defines that the name of a custom section can cause
> a validation error. The streaming decoder, however, used a separate
> Decoder object to decode the name, and thereby avoided a validation
> error. With this CL the streaming decoder uses the main decoder to
> decode the name of the custom section.
>
> In addition this CL removes the test mjsunit/regress/wasm/regress-789952.
> This test defined an invalid WebAssembly module and expected it to
> compile. As it is a regression test, it makes no sense to fix the test.
> The module is invalid because it defines the length of the custom section
> to be '0', so there are no bytes in the custom section for its name.
>
> R=clemensb@chromium.org
> CC=thibaudm@chromium.org
>
> Bug: v8:10126
> Change-Id: I8cfc77c9a5916570d5362d5922e0179a29774da8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2041446
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66348}
Bug: v8:10126
Change-Id: I48aaed8eb9899da1703030fb6809fe46a6e66191
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2069325
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66431}
This CL generalizes the lowering of special CallDescriptors in the
int64-lowering. The reason is a planned extension of the special
handling due to a refactoring of the AtomicWait implementation.
R=jkummerow@chromium.org
Bug: v8:10108
Change-Id: I48d0087e2ad00ba9b44c5198ffdbbae8eb575a85
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2069333
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66420}
Renaming the JS-visible identifiers and strings is left for a future CL.
FinalizationGroup was renamed at Feb 2020 TC39, to better signal that if
a FinalizationRegistry dies, the finalization actions registered with it
may no longer be performed.
Bug: v8:8179
Change-Id: I0d676a71a4a67d2b7175994a67458a6158065844
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2055381
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66416}
This reverts commit 03d5a7ba9b.
Reason for revert: Needs rebaseline:
https://ci.chromium.org/p/v8/builders/ci/V8%20Blink%20Linux/3243
Original change's description:
> [wasm] The name of a custom section can cause a validation error
>
> The WebAssembly spec defines that the name of a custom section can cause
> a validation error. The streaming decoder, however, used a separate
> Decoder object to decode the name, and thereby avoided a validation
> error. With this CL the streaming decoder uses the main decoder to
> decode the name of the custom section.
>
> In addition this CL removes the test mjsunit/regress/wasm/regress-789952.
> This test defined an invalid WebAssembly module and expected it to
> compile. As it is a regression test, it makes no sense to fix the test.
> The module is invalid because it defines the length of the custom section
> to be '0', so there are no bytes in the custom section for its name.
>
> R=clemensb@chromium.org
> CC=thibaudm@chromium.org
>
> Bug: v8:10126
> Change-Id: I8cfc77c9a5916570d5362d5922e0179a29774da8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2041446
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66348}
TBR=ahaas@chromium.org,clemensb@chromium.org
Change-Id: I5a7ea265ce47b9e685a5056bb83db6dc58f774a9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10126
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2065168
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66356}
This reverts commit e5e4ea962e.
Reason for revert: mysterious performance regression chromium:1052756
Original change's description:
> [torque] Support bitfield structs stored within Smis
>
> This change moves the definition of the bits stored in DebugInfo::flags
> to Torque, and updates the only Torque usage of that field to use more
> natural syntax. This is intended as an example of common patterns found
> in various other classes. Several supporting changes are required:
>
> 1. Add a new type representing a bitfield struct stored within a Smi. It
> is currently called SmiTagged, but I'm open to suggestions.
> 2. Add an enum-style output for Torque bitfield structs whose bitfields
> occupy only one bit each.
> 3. Add a new case to MachineOperatorReducer that makes the generated
> code for IncBlockCounter match with what was generated before this
> change.
> 4. Add support for reporting these bitfields in the postmortem debugging
> API. The format matches existing bitfields but with an offset value
> that includes the SMI shift size.
>
> Bug: v8:7793
> Change-Id: Icaecbe4a162da55d2d9a3a35a8ea85b285b2f1b7
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2028832
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66182}
Bug: chromium:1052756, v8:7793
Change-Id: I9e2897efbb6321124bf4952cf09de2f179f7310d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2062569
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66349}
The WebAssembly spec defines that the name of a custom section can cause
a validation error. The streaming decoder, however, used a separate
Decoder object to decode the name, and thereby avoided a validation
error. With this CL the streaming decoder uses the main decoder to
decode the name of the custom section.
In addition this CL removes the test mjsunit/regress/wasm/regress-789952.
This test defined an invalid WebAssembly module and expected it to
compile. As it is a regression test, it makes no sense to fix the test.
The module is invalid because it defines the length of the custom section
to be '0', so there are no bytes in the custom section for its name.
R=clemensb@chromium.orgCC=thibaudm@chromium.org
Bug: v8:10126
Change-Id: I8cfc77c9a5916570d5362d5922e0179a29774da8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2041446
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66348}
Implement the latest spec changes:
- Allow declarative segments to behave like passive & dropped segments.
- Enforce that only declared functions may be returned or used in globals
as funcref.
- Ensure that table fill does not modify any entries if OOB.
Spec tests for select and br_table are still failing due to proposal issue
Bug: v8:10156
R=ahaas@chromium.org
Change-Id: I5b95be36a67bc7482a84b848908cc4cbdf94af03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2027458
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Emanuel Ziegler <ecmziegler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66297}
Since the size of the parameters and locals inputs is already stored on
the FrameStateFunctionInfo, this skips the calls to size() and just
reuses the previous values. The stack parameter can only have a size of
0 or 1 depending on whether it's a InterpretedFunction frame or not.
It also extends the verifier to check that the values to match those
returned by StateValueAccess::size and changes a unit test that added
a TypedStateValues of size 2 to the stack input.
Bug: v8:10051
Change-Id: I3693c04b4677812b9f19491c198d0551df20f817
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2047045
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66268}
Fuchsia's SDK will soon provide GN rules include one for declaring
fuchsia package targets. Since the SDK-provided rule works differently
from the Chromium one but is called fuchsia_package(), we need to rename
the Chromium rule to avoid them clashing.
Bug: chromium:1050703
Change-Id: Ia2fcba8e32f311e6859590d9c95730ffe6875192
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2050388
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66244}
This change moves the definition of the bits stored in DebugInfo::flags
to Torque, and updates the only Torque usage of that field to use more
natural syntax. This is intended as an example of common patterns found
in various other classes. Several supporting changes are required:
1. Add a new type representing a bitfield struct stored within a Smi. It
is currently called SmiTagged, but I'm open to suggestions.
2. Add an enum-style output for Torque bitfield structs whose bitfields
occupy only one bit each.
3. Add a new case to MachineOperatorReducer that makes the generated
code for IncBlockCounter match with what was generated before this
change.
4. Add support for reporting these bitfields in the postmortem debugging
API. The format matches existing bitfields but with an offset value
that includes the SMI shift size.
Bug: v8:7793
Change-Id: Icaecbe4a162da55d2d9a3a35a8ea85b285b2f1b7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2028832
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66182}
GlobalSize will be used as a hint to schedule scavenger work in
https://chromium-review.googlesource.com/c/v8/v8/+/2036661
This is implemented as an atomic variable that's updated when adding/removing
segments.
Bug: chromium:1012816
Change-Id: I8f6c3f10612f8febda9bfe640d91e235aa3c2f12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2043273
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66175}
Allow caching the result of allocating AstConsStrings, to allow
sharing of inferred names between functions.
This is a partial revert of https://crrev.com/c/2020953, with
the observation that *some* AstConsStrings are always flattened,
while others are only ever used as ConsStrings, so we want to
allow the allocation to be lazy while still caching the result.
As a drive-by, cleanup the old AstConsString linked list fields.
Bug: chromium:1011762
Bug: chromium:1048082
Change-Id: Icc14342eb3f6f97359596b42b2c296cbc49fd791
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2042093
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66168}
A pointer-compressed heap has the same heap limit heuristics as a 32-bit
heap. Specifically, the heap limit is restricted to 1GB due to scarce
virtual addresses space on 32-bit platforms. That limitation does not
apply for pointer-compressed heaps which can use 4GB.
This CL changes the heap limit computation to use system the pointer
size instead of the tagged pointer size. Note that the young generation
limit continues to use the tagged pointer size.
Bug: chromium:1045034
Change-Id: I9d5bb818c32a82322476e9c97feee331400ebe0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2042102
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66159}
The Factory/OffThreadFactory allows us to cleanly separate object
construction behaviour between main-thread and off-thread in a
syntactically consistent way (so that methods templated on the factory
type can be made to work on both).
However, there are cases where we also have to access the Isolate, for
handle creation or exception throwing. So far we have been pushing more
and more "customization points" into the factories to allow these
factory-templated methods to dispatch on this isolate behaviour via
these factory methods. Unfortunately, this is an increasing layering
violation between Factory and Isolate, particularly around exception
handling.
Now, we introduce an OffThreadIsolate, analogous to Isolate in the same
way as OffThreadFactory is analogous to Factory. All methods which were
templated on Factory are now templated on Isolate, and methods which
used to take an Isolate, and which were recently changed to take a
templated Factory, are changed/reverted to take a templated Isolate.
OffThreadFactory gets an isolate() method to match Factory's.
Notably, FactoryHandle is changed to "HandleFor", where the template
argument can be either of the Isolate type or the Factory type (allowing
us to dispatch on both depending on what is available).
Bug: chromium:1011762
Change-Id: Id144176f7da534dd76f3d535ab2ade008b6845e3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2030909
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66101}
... by using random seed provided via --gtest_random_seed= flag.
Bug: chromium:1043117
Change-Id: I6114e9c71f3196a386a8457a6ec6f9e1fc80f6ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2027991
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66043}
Remove AstConsString "internalization", and instead make the conversion
to heap String be on-demand with an Allocate method. We never actually
need the heapified cons string more than once, so there's no need to do
the internalization walk or do the next/string union dance in the
AstConsString class.
This also allows us to specify how we want to allocate the String at the
call site. In particular, it allows us to allocate a flat SeqString rather
rather than a ConsString. This allows us to avoid allocating ConsStrings
which will just be passed to a flatten call, and especially avoid
allocating dead ConsStrings in the off-thread old space.
Bug: chromium:1011762
Bug: chromium:1043168
Change-Id: Id851f2f7529d92ad7e5388eb22823fd6d1959cd0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2020953
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66042}
The current implementation takes forwarding reference arguments, which
is fine when you call it with rvalues, like
make_iterator_range(V.begin(), V.end()). If you call it with lvalues
though, it doesn't do what you'd expect. ForwardIterator becomes a
reference:
Foo I = V.begin();
make_iterator_range(I, I); //ForwardIterator is deduced as Foo&
Since iterator are supposed to be small, no harm in passing them by
value.
Change-Id: I151c87304949d810c72c42f60e9d1a7151f61f83
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2020780
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66007}
