Adds NameProvider to allow specifying names of objects. The
corresponding internal NameTrait is registered with the GCInfo object.
Use name infrastructure to provide a hint on encountering an unmarked
object in the marking verifier.
Bug: chromium:1056170
Change-Id: I95bb290660f5905500f861bd5cc85148a1b47184
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2454087
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@{#70400}
This CL introduces concurrent marking to the cppgc library.
The CL includes:
(*) Split MarkingState to mutator thread and concurrent thread.
(*) Split MarkingVisitor to mutator thread and concurrent thread.
(*) Introduce ConcurrentMarker for managing concurrent marking.
(*) Update unified heap to support concurrent marking as well.
See slides 13 and 14 in the following link for class hierarchies:
https://docs.google.com/presentation/d/1uDiEjJ-f1VziBKmYcvpw2gglP47M53bwj1L-P__l9QY/
Bug: chromium:1056170
Change-Id: I6530c2b21613011a612773d36fbf37416c23c5e7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2424348
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@{#70352}
To support compaction of backing stores in blink, we need to distinguish
custom spaces holding backing stores from other custom spaces.
Custom space compactablity is explicitly declared as an enum value and
propagated to BaseSpace as a bool flag.
Note that even if/when general compaction is implemented/enabled for
normal pages we will still need such a marking for supporting
non-compactable custom spaces.
Bug: v8:10990
Change-Id: I165a0268ded121e91399834a4091e88e57f2565c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2449973
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70345}
This value is unused for now. This CL is part 1 of a 3-step dance.
Part 2 will be teaching Chrome's Platform implementation to accept
the new value. Part 3 will then actually use it in V8.
Bug: chromium:1117591
Change-Id: Ie3aed20d4cc58f3def3be2a3a03bba4c3a37bf44
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2450056
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70335}
In construction objects don't have anything to sync with on the
allocation side since they weren't marked as fully constructed yet.
This could mean the initialization of the marking bit on the mutator
thread and setting the mark bit on a concurrent thread could race
(potentially resulting in losing the mark bit when the gc info index
overwrites it).
This CL fixes this issue by using a set of in construction objects.
In construction objects are no longer marked. Instead they are pushed
to the set and the heap object header is marked when they are popped
from the worklist. Since the set avoids duplicates, this allows us to
both avoid worklist explosion (due to pushing the same in construction
object multiple times) and avoid the data race on the mark bit.
This CL uses an unordered_set to record objects. Synchronization uses
a lock, which could be costly but is not expected to be obtained often.
Bug: chromium:1056170
Change-Id: I366b59f476c166ff06e15b280df9e846034cc6cf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2437388
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70282}
Remove the runtime functionality allowing the Isolate to be allocated
4GB aligned in non-pointer-compressed builds. This was barely used in
tests, so we can remove it to give slightly stronger compile-time
guarantees about pointer-compression-only methods being used only under
pointer-compression.
Change-Id: I8eb990faa8f8499ecdcb70ca104ffad4be1437b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2442790
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70262}
For cross-thread handling we require the atomic marking pause to
provide an atomically consistent view of markbits and weak references.
This is ensured by locking the whole atomic pause from entering to
weak processing.
This CL move ProcessWeakness() into FinishMarking() which allows to
nicely scope the upcomming lock from EnterAtomicPause() to
LeaveAtomicPause(). The alternative is requiring the caller to ensure
proper locking which is harder than ensuring that the Marker is
consistent.
Bug: chromium:1056170
Change-Id: Ib6028a0d76fcf9422c4a0d422fec3d568f106bf2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2442620
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70259}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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 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}
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}
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 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 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}
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}
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}
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}
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}
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}
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}
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}
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 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}
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}
- 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 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 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 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}
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}
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}
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}
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}
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}
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 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}
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}
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}
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}
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}
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}
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}
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}
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 SequentialUnmapperTest replaces the process-global PageAllocator
with a wrapper which tracks allocations. The suite was deleting the
tracking allocator without first restoring the original PageAllocator,
causing any subsequent tests which tried to use it to use-after-free.
Bug: chromium:934932
Change-Id: I0f69b6a07542a3f381724afdbfb2e9b67a9f39de
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2010113
Commit-Queue: Wez <wez@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Wez <wez@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65872}
Add support for internalizing an AstValueFactory using the off-thread
factory. Includes adding ConsString support to OffThreadFactory.
This introduces a Handle union wrapper, which is used in locations that
can store a Handle or an OffThreadHandle. This is used in this patch for
the internalized "string" field of AST strings, and will be able to be
used for other similar fields in other classes (e.g. the ScopeInfo
handle in Scope, object boilerplate descriptor handles, the inferred
name handle on FunctionLiterals, etc.). It has a Factory-templated
getter which returns the appropriate handle for the factory, and a
debug-only tag to make sure the right getter is used at runtime. This
union wrapper currently decomposes implicitly to a Handle if the getter
is not called, to minimise code changes, but this implicit conversion
will likely be removed for clarity.
Bug: chromium:1011762
Change-Id: I5dd3a7bbdc483b66f5ff687e0079c545b636dc13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1993971
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65816}
Introduce OffThreadFactory with initial string construction support.
The OffThreadFactory shares with Factory a new CRTP base class, called
FactoryBase. Methods in FactoryBase return a FactoryHandle<Factory, T>
alias, which is Handle<T> for normal Factory and a new OffThreadHandle<T>
for OffThreadFactory. OffThreadHandle<T> behaves like Handle<T>, except
it stores the object in-line rather than needing external storage.
Any shared factory methods are moved into FactoryBase, which uses CRTP
to call the sub-class's AllocateRaw method (plus a few more customization
points which need Isolate access on the main thread).
Methods that used to take an Isolate or Factory, and are needed off the
main thread, are now expected to be templated on the factory type and
to use the appropriate handle.
Once an OffThreadFactory has finished being used (e.g. off-thread
compilation completed) its pages are "Published" into the main-thread
Heap. To deal with string internalization without creating a bunch of
ThinStrings, this is done in two stages:
1. 'FinishOffThread': The off-thread pages are walked to
collect all slots pointing to "internalized" strings. After this is
called it is invalid to allocate any more objects with the factory.
2. 'Publish': On the main thread, we transform these slots into
<Handle to holder, offset> pairs, then for each saved slot
re-internalize its string and update the slot to point to the
internalized string.
Bug: chromium:1011762
Change-Id: I008a694da3c357de34362bd86fe7e1f46b535d5e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1992434
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65787}
- Introduces a API to set top of the stack through
EmbedderHeapTracer::SetStackTop.
- Introduces a new API to inform V8 about an empty embedder stack.
- Switch internal representation of TracedReference
for on-stack handles to a proper stack that considers all
contained handles as roots.
- Handle garbage is avoided by cleaning up on handle creation or
GC.
Design doc: https://bit.ly/on-stack-traced-reference
Bug: chromium:1040038
Change-Id: I927ef0abb268fdb5853c9e17b1bc96e2491cf101
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1993973
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65757}
These worklists are needed for accounting of objects retained by
native contexts for the new memory measurement API.
Bug: chromium:973627
Change-Id: I354c5ebbbac11da4d01800164e15b94a93aa654c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1943158
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65542}
Before this CL a byte was used per bucket to store whether the bucket
is possibly empty or not. This CL changes this such that each bucket
only needs a single bit.
PossiblyEmptyBuckets is now a word in the page header. If more bits
are needed than fit into a single word, an external bitmap is
allocated using AlignedAlloc. Storing this on the page header, allows
to remove initial_buckets from the SlotSet. The SlotSet allocation is
then again a power-of-2 in release mode.
Reland of https://crrev.com/c/1906376: Incorrect DCHECK was removed.
WordsForBuckets was simplified and a test was added for it.
Bug: chromium:1023139
Change-Id: I9a08e03a9c10e5781a146b9a28dab38824aad91f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1954391
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65385}
This reverts commit 80caf2cf53.
Reason for revert: Breaks gpu tests:
https://ci.chromium.org/p/v8/builders/ci/Win%20V8%20FYI%20Release%20(NVIDIA)/5570
# Debug check failed: !possibly_empty_buckets->Contains(bucket_index).
Original change's description:
> [heap] Reduce size of possibly empty buckets
>
> Before this CL a byte was used per bucket to store whether the bucket
> is possibly empty or not. This CL changes this such that each bucket
> only needs a single bit.
>
> PossiblyEmptyBuckets is now a word in the page header. If more bits
> are needed than fit into a single word, an external bitmap is
> allocated using AlignedAlloc. Storing this on the page header, allows
> to remove initial_buckets from the SlotSet. The SlotSet allocation is
> then again a power-of-2 in release mode.
>
> Change-Id: If61fd5cfa153f98757beeb444a530f6e2803fdb6
> Bug: chromium:1023139
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906376
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64991}
TBR=ulan@chromium.org,dinfuehr@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:1023139
Change-Id: Ia90b07b9562af934dacba012da31e4f172f2922d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1918258
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65001}
Before this CL a byte was used per bucket to store whether the bucket
is possibly empty or not. This CL changes this such that each bucket
only needs a single bit.
PossiblyEmptyBuckets is now a word in the page header. If more bits
are needed than fit into a single word, an external bitmap is
allocated using AlignedAlloc. Storing this on the page header, allows
to remove initial_buckets from the SlotSet. The SlotSet allocation is
then again a power-of-2 in release mode.
Change-Id: If61fd5cfa153f98757beeb444a530f6e2803fdb6
Bug: chromium:1023139
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906376
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64991}
Add a new LargeObjectSpace for off-thread allocation. Similar to the
paged OffThreadSpace, it always allocates pages, doesn't participate
in mark or sweep, and can be merged into the OldLargeObjectSpace once
its objects are ready.
Bug: chromium:1011762
Change-Id: I95e2d38b10a9cc5eae4ffd35afef95272e13c731
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1881153
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64727}
Change SlotSet representation to a variable-sized array of pointers to
buckets. The length of the array/number of buckets depends on the size
of the page.
Before this change the SlotSet always stored a fixed number of
buckets. Large pages needed a SlotSet-Array to cover the whole object.
Now both regular and large pages both use a single SlotSet object,
which contains all bucket pointers.
Change-Id: I2d8d62fad54b58409cd39ae7a52c64497ee7c261
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1876811
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64635}
Add a new PagedSpace called OffThreadSpace. This space will be used for
off-thread allocation -- it never marks or sweeps, and always expands
into fresh pages. Once allocation completes, this space's pages can be
merged into the old space.
The space is similar to the CompactionSpace, and merging for both is
identical, so we intrduce a new LocalSpace base class that both extend.
They differ in interaction with the sweeper and in how new pages are
acquired.
This patch adds the new space and uses it in a few unittests. Future
work will use it in the main source code.
Bug: chromium:1011762
Change-Id: Ia008cc95c6e1ef1d1e7ae305fa80fbfc1ff4be2d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1873690
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64509}
This CL ensures that recorded slots are either in the sweeping or the
old-to-new remembered set after mark-compact depending on whether the
page was already swept or not.
All pages that are swept during the evacuation phase also have their
remembered sets merged. is_local() is renamed to
is_compaction_space() and non-virtual. The PagedSpace now not only
knows whether it is a compaction space or not but also for which
collection through the compaction_space_kind_ field. This allows
RefillFreeList to merge the remembered sets immediately also for the
mark-compact collection.
Change-Id: I7457f8393d73f3e8d6b6ebedc46ebc36af509729
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1868613
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64458}
With the smi-corrupting decompression approach we don't have to sign
extend Smis anymore and therefore we can switch to zero extending
approach by moving the isolate root to the beginning of the reserved
4Gb region.
Bug: v8:9706
Change-Id: Icd6008fa87d0924519b574fdec445976f742e306
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1835548
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64144}
Do not store page_start_ in SlotSet anymore, when needed this address
can be calculated cheaply and be passed in from the caller.
Bug: v8:9454
Change-Id: I4cdb010e4126680d8df500e40ae3d0bc884cf501
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1838731
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64103}
Since https://crrev.com/c/1771783 the mutator owns the old-to-new
remembered set, while the sweeper modifies the sweeping-slot-set.
This allows us to update the old-to-new remembered set non-atomically.
In this CL the mutator now inserts non-atomically into the remembered
set. The AccessMode is now explicit for Insert-operations as well.
Bug: v8:9454
Change-Id: I94730345f7dd34fe309839969330687c94b3080b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1803652
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63971}
Before this CL the main thread fetched the background GC stats and
added them to the main runtime-call-stats table. This resulted
in background GC stats showing up in the main thread trace.
This CL switches the background GC stats to use worker thread runtime-
calls-stats table. This is now consistent with other background
components of V8 suchs background compiler and parser.
Bug: v8:9508
Change-Id: Ic4c0685ded6024f78d0f22f81419fd5677202f25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1776083
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63459}
This new FreeList should be a reasonable replacement for our old
FreeListLegacy: it is slightly less efficient (~1%), but uses much
less memory (often 5% less old_space size).
It is based on FreeListMany, with the following additions:
- A cache to waste less time iterating empty categories
- A fast path for allocations done in the runtime and generated code
- A slow path (the same as FreeListMany actually) for allocations
done in the GC.
Bug: v8:9329
Change-Id: Ifc10b88df7861266a721afd2c6e6d8357255ec4e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762292
Commit-Queue: Darius Mercadier <dmercadier@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63345}
Do not pass it as argument to CreateObjectFillerAt and remove the enum.
Bug: v8:9454
Change-Id: Iafa37acbfea73d3cabb1732dbec0944db859fac2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762017
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63282}
This reverts commit 60843b426b.
Reason for revert: TSAN detected issue between Scavenge workers.
One task could invoke RefillFreeList(), while the other task iterates the remembered set of a swept page.
Original change's description:
> Use list of invalidated objects for old-to-new refs
>
> Instead of inserting "deletion" entries into the store buffer, keep a
> list of invalidated objects to filter out invalid old-to-new slots.
>
> The first CL https://crrev.com/c/1704109 got reverted because both the
> sweeper and the main task were modifying the invalidated slots data
> structure concurrently. This CL changes this, such that the sweeper
> only modifies the invalidated slots during the final atomic pause when
> the main thread is not running. The sweeper does not need to clean this
> data structure after the pause, since the "update pointers" phase
> already removed all invalidated slots.
>
> The second CL https://crrev.com/c/1733081 got reverted because the
> sweeper might find more free space than the full GC before it. If an
> object shrinks after the pause but before the sweep, the invalidated
> object might span free memory and potentially new allocated objects.
> Therefore shrink invalidated objects when processing swept pages on
> the main thread. Also clean recorded slots in the gap.
>
> TBR=petermarshall@chromium.org
>
> Bug: v8:9454
> Change-Id: I80d1fa3bbc24e97f7c97a373aaad66f105456f12
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1751795
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63239}
TBR=ulan@chromium.org,hpayer@chromium.org,dinfuehr@chromium.org
Change-Id: I9c6a371ebe36a1873acbe0d6c6a75dd2f5a55f4e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9454
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1760817
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63253}
Instead of inserting "deletion" entries into the store buffer, keep a
list of invalidated objects to filter out invalid old-to-new slots.
The first CL https://crrev.com/c/1704109 got reverted because both the
sweeper and the main task were modifying the invalidated slots data
structure concurrently. This CL changes this, such that the sweeper
only modifies the invalidated slots during the final atomic pause when
the main thread is not running. The sweeper does not need to clean this
data structure after the pause, since the "update pointers" phase
already removed all invalidated slots.
The second CL https://crrev.com/c/1733081 got reverted because the
sweeper might find more free space than the full GC before it. If an
object shrinks after the pause but before the sweep, the invalidated
object might span free memory and potentially new allocated objects.
Therefore shrink invalidated objects when processing swept pages on
the main thread. Also clean recorded slots in the gap.
TBR=petermarshall@chromium.org
Bug: v8:9454
Change-Id: I80d1fa3bbc24e97f7c97a373aaad66f105456f12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1751795
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63239}
This reverts commit e2f98ec22c.
Reason for revert: Caused performance regression in ArrayLiteralInitialSpreadSmallHoley.
Original change's description:
> Use list of invalidated objects for old-to-new refs
>
> Instead of inserting "deletion" entries into the store buffer, keep
> a list of invalidated objects to filter out invalid old-to-new slots.
>
> The first CL https://crrev.com/c/1704109 got reverted because both the sweeper and the main task were modifying the invalidated slots data structure concurrently. This CL changes this, such that the sweeper only modifies the invalidated slots during the final atomic pause when the main thread is not running. The sweeper does not need to clean this data structure after the pause, since the "update pointers" phase already removed all invalidated slots.
>
> Bug: v8:9454
> Change-Id: Iffb5bf96de2c89eee1ee1231a3414a0f2a155cbc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733081
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63087}
TBR=ulan@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:9454
Change-Id: I328b9f72df45fc9570d4a4d1b5389eac010638c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1743970
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63131}
Instead of inserting "deletion" entries into the store buffer, keep
a list of invalidated objects to filter out invalid old-to-new slots.
The first CL https://crrev.com/c/1704109 got reverted because both the sweeper and the main task were modifying the invalidated slots data structure concurrently. This CL changes this, such that the sweeper only modifies the invalidated slots during the final atomic pause when the main thread is not running. The sweeper does not need to clean this data structure after the pause, since the "update pointers" phase already removed all invalidated slots.
Bug: v8:9454
Change-Id: Iffb5bf96de2c89eee1ee1231a3414a0f2a155cbc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733081
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63087}
This is a reland of a0728e869b
Original change's description:
> [d8] Remove maximum workers limitation
>
> This CL refactors the lifetime management of the v8::Worker C++ object
> and in the process lifts the 100 maximum worker limitation. To do this,
> it uses a Managed<v8::Worker> heap object and attaches the managed to
> the API worker object.
>
> R=mstarzinger@chromium.org
> BUG=v8:9524
>
> Change-Id: I279b7aeb6645a87f9108ee6f572105739721cef4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1715453
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62932}
Bug: v8:9524
Change-Id: I7d903fb12ddb00909a9429455f46c55db2fd02de
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1722562
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62974}
When the main thread contributes to an item parallel job and runs
an item parallel task, it currently emits a background GC trace event.
That is confusing and may lead to incorrect accounting of main thread
GC time. This patch fixes it by introducing a 'Runner' parameter
to ItemParalllelJob::Task::RunInParallel and emitting a foreground
GC event if the runner is the main thread.
Bug: v8:9508
Change-Id: I755751bfe9eef427666d5f16fb50aa6093059e80
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1706485
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62798}
This reverts commit dcac02ee81.
Reason for revert: TSAN discovered issue with cleaning invalidated slots in sweeper threads and inserting new slots in the main thread.
Original change's description:
> Use list of invalidated objects for old-to-new refs
>
> Instead of inserting "deletion" entries into the store buffer, keep
> a list of invalidated objects to filter out invalid old-to-new slots.
>
> Bug: v8:9454
> Change-Id: Icd21d8cb2159190457f54d0f8b56742ecc820419
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695474
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62744}
TBR=ulan@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
Change-Id: I4278e9100c76657663e0a6a62f5d86bb3a343c0e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9454
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704109
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62746}
Instead of inserting "deletion" entries into the store buffer, keep
a list of invalidated objects to filter out invalid old-to-new slots.
Bug: v8:9454
Change-Id: Icd21d8cb2159190457f54d0f8b56742ecc820419
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695474
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62744}
If the embedder specifies an initial heap size, then we can take it
as a hint to skip full GCs below that threshold.
Bug: v8:9306
Change-Id: I42a4c597bf75c6ba9845ed7a6bd9946012979005
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1646515
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62030}
The new API function is called ConfigureDefaultsFromHeapSize and
accepts two parameters: the initial and the maximum heap size.
Based on the given limits the function computes the default size
for the young and the old generation.
The patch also cleans up the existing functions to make them
consistent in terms of units and heap structure.
Bug: v8:9306
Change-Id: If2200a9cdb45b0b818a373207efe4e6426f7b688
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1631593
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62017}
The size is now computed as a fraction of the old space size:
- for low memory devices (<512MB) the fraction is 1 / 256.
- for all other devices the fraction is 1 / 128.
The values were chosen to minimize the difference between the new
and the old heuristics.
Bug: v8:9306
Change-Id: I3246fe2d6fc589af6220e2566e3f10fb13470b82
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632158
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61947}
Rework limit computation:
- Model controller as static classes based on traits.
- Compute growing factors for both controllers and pick the
larger growing factor for both controllers.
- Factor out limit computation in its own function.
Bug: chromium:948807
Change-Id: Id466a66d7aa573de91ad388ea9218e9f6721d19a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627534
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61801}
This CL was generated by an automatic clang AST rewriter using this
matcher expression:
callExpr(
callee(
cxxMethodDecl(
hasName("operator->"),
ofClass(isSameOrDerivedFrom("v8::internal::Object"))
)
),
argumentCountIs(1)
)
The "->" at the expression location was then rewritten to ".".
R=jkummerow@chromium.orgTBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org
Bug: v8:9183, v8:3770
No-Try: true
No-Tree-Checks: true
Change-Id: I0a7ecabdeafe51d0cf427f5280af0c7cab96869e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1624209
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61764}
Provide a global memory controller used to compute limits for combined
on-heap and embedder memory. The global controller uses the same
mechanism (gc speed, mutator speed) and growing factors as the regular
on-heap controller.
Rely on V8's mechanisms for configured state that stops shrinking the
limit.
Reland:
- API fixes with overrides and default versions.
- Fix of depending on uninitialized values when using the old API.
- GCTracer: Fixed issue in speed computation.
- GCTracer: Added unittests.
This reverts commit 5e043f2773.
Bug: chromium:948807
Change-Id: I0f81253b3e1a8b49a7ac107c012a15e33cb514d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622852
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61735}
This reverts commit dac86be251.
Reason for revert: Still failing msan: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/26904
Original change's description:
> Reland "[heap] Add global memory controller"
>
> Provide a global memory controller used to compute limits for combined
> on-heap and embedder memory. The global controller uses the same
> mechanism (gc speed, mutator speed) and growing factors as the regular
> on-heap controller.
>
> Rely on V8's mechanisms for configured state that stops shrinking the
> limit.
>
> This reverts commit 5e043f2773.
>
> Tbr: ulan@chromium.org
> Bug: chromium:948807
> Change-Id: Id4f94e7dcb458d1d0d2f872194f8f3ea0959a73f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622968
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61715}
TBR=ulan@chromium.org,mlippautz@chromium.org
Change-Id: If30649f158a08fd185f2771a13b8e09cf53fb667
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:948807
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622849
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61716}
Provide a global memory controller used to compute limits for combined
on-heap and embedder memory. The global controller uses the same
mechanism (gc speed, mutator speed) and growing factors as the regular
on-heap controller.
Rely on V8's mechanisms for configured state that stops shrinking the
limit.
This reverts commit 5e043f2773.
Tbr: ulan@chromium.org
Bug: chromium:948807
Change-Id: Id4f94e7dcb458d1d0d2f872194f8f3ea0959a73f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622968
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61715}
This reverts commit cfe281f3db.
Reason for revert: Fails on gcc bots
Original change's description:
> [heap] Add global memory controller
>
> Provide a global memory controller used to compute limits for combined
> on-heap and embedder memory. The global controller uses the same
> mechanism (gc speed, mutator speed) and growing factors as the regular
> on-heap controller.
>
> Rely on V8's mechanisms for configured state that stops shrinking the
> limit.
>
> Bug: chromium:948807
> Change-Id: I3283a2c28e6ab889f8d2ad85c9b67b8f234b9900
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1619762
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61712}
TBR=ulan@chromium.org,hpayer@chromium.org,mlippautz@chromium.org,bikineev@chromium.org
Change-Id: I503d5a1436eb9156556b5bca852d2b2f9da2446f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:948807
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622967
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61713}
Provide a global memory controller used to compute limits for combined
on-heap and embedder memory. The global controller uses the same
mechanism (gc speed, mutator speed) and growing factors as the regular
on-heap controller.
Rely on V8's mechanisms for configured state that stops shrinking the
limit.
Bug: chromium:948807
Change-Id: I3283a2c28e6ab889f8d2ad85c9b67b8f234b9900
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1619762
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61712}
Seems like the CodeBuilder CL actually caused this.
This is a reland of 964edc251f
Original change's description:
> [heap] Set read-only space's and its pages' heap_ to null.
>
> Various small changes are required to enable this.
>
> HeapObject::GetReadOnlyRoots no longer uses the Space's heap when
> possible (see comment in ReadOnlyHeap::GetReadOnlyRoots definition).
> This requires that ReadOnlyRoots be construct-able using a raw pointer
> to the read-only space's roots array.
>
> Global read-only heap state is now cleared by tests where appropriate
> and extra DCHECKs in ReadOnlyHeap::SetUp should make catching future
> issues easier.
>
> String padding is now always cleared just before read-only space is
> sealed when not deserializing.
>
> Change-Id: I7d1db1c11567be5df06ff7066f3a699125f8b372
> Bug: v8:7464
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1535830
> Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61188}
Bug: v8:7464
Change-Id: If75bbd16c2e2af5b80cd60811dfd7866f8be8309
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1599186
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61323}
This reverts commit 964edc251f.
Reason for revert: chromium:959190
Original change's description:
> [heap] Set read-only space's and its pages' heap_ to null.
>
> Various small changes are required to enable this.
>
> HeapObject::GetReadOnlyRoots no longer uses the Space's heap when
> possible (see comment in ReadOnlyHeap::GetReadOnlyRoots definition).
> This requires that ReadOnlyRoots be construct-able using a raw pointer
> to the read-only space's roots array.
>
> Global read-only heap state is now cleared by tests where appropriate
> and extra DCHECKs in ReadOnlyHeap::SetUp should make catching future
> issues easier.
>
> String padding is now always cleared just before read-only space is
> sealed when not deserializing.
>
> Change-Id: I7d1db1c11567be5df06ff7066f3a699125f8b372
> Bug: v8:7464
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1535830
> Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61188}
TBR=ulan@chromium.org,hpayer@chromium.org,delphick@chromium.org,goszczycki@google.com
Change-Id: I53cecf3976dfeabae309040313351385f651f010
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7464, chromium:959190
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1591608
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61217}
Various small changes are required to enable this.
HeapObject::GetReadOnlyRoots no longer uses the Space's heap when
possible (see comment in ReadOnlyHeap::GetReadOnlyRoots definition).
This requires that ReadOnlyRoots be construct-able using a raw pointer
to the read-only space's roots array.
Global read-only heap state is now cleared by tests where appropriate
and extra DCHECKs in ReadOnlyHeap::SetUp should make catching future
issues easier.
String padding is now always cleared just before read-only space is
sealed when not deserializing.
Change-Id: I7d1db1c11567be5df06ff7066f3a699125f8b372
Bug: v8:7464
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1535830
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61188}
Failure addressed by not exposing the new test to the jitless environment.
(jgruber@ on TBR).
New enum RelocInfo::COMPRESSED_EMBEDDED_OBJECT created to support
compressed pointers in generated code. Enum name EMBEDDED_OBJECT
changed to FULL_EMBEDDED_OBJECT.
RelocInfo::[set_]target_object() abstract away the difference between
FULL_EMBEDDED_OBJECT and COMPRESSED_EMBEDDED_OBJECT.
Compressed embedded objects can only be created at this time on
x64 with pointer compression turned on. Arm64 constant pools don't
support compressed objects at this time.
NOPRESUBMIT=true
Bug: v8:7703
TBR: jgruber@chromium.org
Change-Id: Ifff53b041bab09b4b8c3e16085e5df4aa2b99f4f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588461
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61104}
