Adds concurrent marking for reaching through v8::TracedReference.
Before this CL, a v8::TracedReference would always be processed on the
main thread by pushing a callback for each encountered reference.
This CL now wires up concurrent handling for such references. In particular:
- Global handles are already marked as well and not repurposed during
the same GC cycle.
- Since global handles are not repurposed, it is enough to
double-deref to the V8 object, checking for possible null pointers.
- The bitmap for global handle flags is mostly non-atomic, with the
markbit being the exception.
- Finally, all state is wired up in CppHeap. Concurrent markers keep
their own local worklist while the mutator marker directly pushes to
the worklist owned by V8.
Bug: v8:12600
Change-Id: Ia67dbd18a57dbcccf4dfb9ccfdb9ee438d27fe71
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516255
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79736}
This is a reland of commit e76ad5c6d9
Changes compared to original:
- Move invocation of LAZY_INSTANCE_INITIALIZER to a static global
variable, as some builds were failing with a function-level static.
- Drive-by: Improve documentation a bit.
Original change's description:
> [wasm-gc] Implement isorecursive canonicalization
>
> This implements isorecursive canonicalization for static types.
>
> Not implemented in this CL:
> - Runtime type canonicalization.
> - Cross-module signature canonicalization for purposes of call_indirect.
>
> Bug: v8:7748
> Change-Id: I6214f947444eea8d7b15a29b35c94c3d07ddb525
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3541925
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79665}
Bug: v8:7748
Change-Id: I493fba1906491762f7d8bae50108e3e4a743391d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3560480
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79692}
This implements isorecursive canonicalization for static types.
Not implemented in this CL:
- Runtime type canonicalization.
- Cross-module signature canonicalization for purposes of call_indirect.
Bug: v8:7748
Change-Id: I6214f947444eea8d7b15a29b35c94c3d07ddb525
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3541925
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79665}
The code is dead since migrating to jobs API.
Change-Id: Icdcc3523ffe5830ef5851cf4ea86e579841f543c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3540103
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79573}
This is a reland of 6b690a6b48.
The previous version of this CL was a bit too aggressive in the
duplication of branch conditions. This caused an increase in
register pressure in some cases, thus reducing performance.
In fact, duplicating branch conditions that require an "== 0" to be
added provides no benefits. We are thus now a bit less aggressive, and
only duplicate comparisons.
Original change's description:
> Reland [compiler] Simplify "==0" branches in MachineOperatorReducer
>
> This is a reland of 48b443f692.
>
> While fixing the initial CL, we stumbled upon a few bugs that
> we had to fix:
>
> - CommonOperatorReducer and SimplifiedOperatorReducer were applied
> before and after SimplifiedLowering, but always assumed that it
> was before SimplifiedLowering, and thus had the wrong semantics
> for branches in some cases. They now have an added parameter to
> know which semantics of branch they should use.
>
> - The lowering of StaticAssert was wrong and could leave kHeapConstant
> in the assert (instead of machine Booleans).
>
> Original change's description:
> > [compiler] Simplify "==0" branches in MachineOperatorReducer
> >
> > Bug: v8:12484
> > Change-Id: I0667c7464c0dd71338bc199a24a69248a7a0a525
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497303
> > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> > Owners-Override: Tobias Tebbi <tebbi@chromium.org>
> > Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#79379}
>
> Bug: v8:12484
> Change-Id: Ibbf5df96fce5ccb04868dc517539479bf69f5703
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516869
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79528}
Bug: v8:12484
Change-Id: I31f575a59811a83c7c1acb4c14bf5ded63a8f536
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3540102
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79560}
This reverts commit 6b690a6b48.
Reason for revert: causes a few regressions here https://chromeperf.appspot.com/group_report?rev=79528
Original change's description:
> Reland [compiler] Simplify "==0" branches in MachineOperatorReducer
>
> This is a reland of 48b443f692.
>
> While fixing the initial CL, we stumbled upon a few bugs that
> we had to fix:
>
> - CommonOperatorReducer and SimplifiedOperatorReducer were applied
> before and after SimplifiedLowering, but always assumed that it
> was before SimplifiedLowering, and thus had the wrong semantics
> for branches in some cases. They now have an added parameter to
> know which semantics of branch they should use.
>
> - The lowering of StaticAssert was wrong and could leave kHeapConstant
> in the assert (instead of machine Booleans).
>
> Original change's description:
> > [compiler] Simplify "==0" branches in MachineOperatorReducer
> >
> > Bug: v8:12484
> > Change-Id: I0667c7464c0dd71338bc199a24a69248a7a0a525
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497303
> > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> > Owners-Override: Tobias Tebbi <tebbi@chromium.org>
> > Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#79379}
>
> Bug: v8:12484
> Change-Id: Ibbf5df96fce5ccb04868dc517539479bf69f5703
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516869
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79528}
Bug: v8:12484
Change-Id: I457464d793e9c5af8448564aa3b46be863b96fbb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3540148
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79552}
This CL removes:
- Dynamic map checks aka minimorphic property loads (TF support,
builtins).
- "Bailout" deopts (= drop to the interpreter once, but don't
throw out optimized code).
- "EagerWithResume" deopts (= part of dynamic map check
functionality, we call a builtin for the deopt check and deopt
or resume based on the result).
Fixed: v8:12552
Change-Id: I492cf1667e0f54586690b2f72a65ea804224b840
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3401585
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79544}
This is a reland of 48b443f692.
While fixing the initial CL, we stumbled upon a few bugs that
we had to fix:
- CommonOperatorReducer and SimplifiedOperatorReducer were applied
before and after SimplifiedLowering, but always assumed that it
was before SimplifiedLowering, and thus had the wrong semantics
for branches in some cases. They now have an added parameter to
know which semantics of branch they should use.
- The lowering of StaticAssert was wrong and could leave kHeapConstant
in the assert (instead of machine Booleans).
Original change's description:
> [compiler] Simplify "==0" branches in MachineOperatorReducer
>
> Bug: v8:12484
> Change-Id: I0667c7464c0dd71338bc199a24a69248a7a0a525
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497303
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Owners-Override: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79379}
Bug: v8:12484
Change-Id: Ibbf5df96fce5ccb04868dc517539479bf69f5703
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516869
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79528}
Modernise the RegList interface to be a proper class, rather than a
typedef to an integer, and add proper methods onto it rather than ad-hoc
bit manipulation.
In particular, this makes RegList typesafe, adding a DoubleRegList for
DoubleRegisters.
The Arm64 CPURegList isn't updated to use (or extend) the new RegList
interface, because of its weird type-erasing semantics (it can store
Registers and VRegisters). Maybe in the future we'll want to get rid of
CPURegList entirely and use RegList/DoubleRegList directly.
Change-Id: I3cb2a4d386cb92a4dcd2edbdd3fba9ef71f354d6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516747
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79460}
Instead of using the high water mark for determining this metric, we use
a bitset for all active/used system pages on a V8 heap page. Each time
when allocating a LAB on a page, we add the pages of that memory range
to that bitset. During sweeping we rebuild that bitset from scratch and
replace it with the old one in case free pages are discarded by the GC.
We DCHECK here that the sweeper only ever removes pages. This has the
nice benefit of ensuring that we don't miss any allocations (like we
do now for concurrent allocations).
CommittedPhysicalMemory for a page is then calculated by counting the
set bits in the bitset and multiplying it with the system page size.
This should be simpler to verify and track the "real" effective size
more precisely.
One case where we are partially less precise than the current
implementation is for LABs. In order to reduce complexity we now treat
all pages of a LAB allocation as active immediately. In the current
implementation we tried to only account the actual used part of the LAB
when changing the LAB later. This is more complex to track correctly
but also doesn't account the currently used LAB in effective size.
Change-Id: Ia83df9ad5fbb852f0717c4c396b5074604bd21e9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497363
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79428}
This rename better reflects that heap_base is both used in cppgc but
also V8's GC.
Bug: v8:12691
Change-Id: Ia18ecba462d1b55cee6722452ceb28b25490a066
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3506374
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79398}
Currently ClobberDoubleRegisters is implemented in C++ and is
not guaranteed to clobber all registers. Rewritten in assembly
to clobber all double registers
Bug: v8:11798
Change-Id: I11c09bd247c929d251e6e509ea5cc76b9981ea98
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3490715
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79380}
The utility type is independent of V8 and useful for cppgc as well.
Move to base/ to allow reusing.
Change-Id: I9de9b4a87bb113fb4c2232d90253afb0f38faa68
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497336
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79346}
Store the free registers as a RegList rather than stack of Register
values. This allows us to simplify some of the register freeing logic,
including passing the current free set to nodes for use as temporaries.
Drive-by: Replace ALWAYS_ALLOCATABLE_GENERAL_REGISTERS with
ALLOCATABLE_GENERAL_REGISTERS, which is the more general list (the former
is an implementation detail for optionally reserving a register for
the cage register).
Bug: v8:7700
Change-Id: I666e9a7547c2f4f4e578fbcbb4bd3fe3cb06dac5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497767
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79344}
- Add a comment on the macro that registers a prefinalizer.
- Refactor the API to avoid exposing internal types needlessly.
Change-Id: Ia88e786304616848556263410a8f5398c5374533
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497766
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79334}
The per-Isolate Symbol tables are implemented using NameDictionary
before, which has additional property details overhead
And NameDictionary is limited to 2^23, which limits the Symbol
tables to be a maximum of 2^23.
- replace NameDictionary with SymbolTable in isolate
Bug: v8:12575
Change-Id: Ica4f05aac3494f7dfa3a074c240d4ba25df814e9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3476897
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79285}
This CL introduces an additional verification pass at the end of
SimplifiedLowering. The verification checks consistency of the lowered
graph with respect to node types under the effect of used truncations.
Typing of additional, lower level nodes is required and added in this
CL.
The verification pass can be enabled using --verify-simplified-lowering.
Bug: v8:12619, v8:11682
Change-Id: I21e7ebcf40153e53108ddfad2a871c7cbd61a085
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3452029
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79264}
This is a reland of dec62c2d0f
Revert was not necessary as test was independently flaking.
Original change's description:
> heap: Factor out raw allocation functions into HeapAllocator
>
> This CL is mostly mechanic and provides runtime and static
> dispatch for allocation of objects using HeapAllocator.
>
> Future CLs will remove the Heap bottelenecks.
>
> Bug: v8:12615
> Change-Id: Id2becf7da4bd5273f96abc0e1a4ac6c04bddb1cb
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474674
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79229}
Bug: v8:12615
Change-Id: I505ebde7afd2b0d03e11ef4cbcf1d4d09c6826a1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3484322
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79236}
This CL is mostly mechanic and provides runtime and static
dispatch for allocation of objects using HeapAllocator.
Future CLs will remove the Heap bottelenecks.
Bug: v8:12615
Change-Id: Id2becf7da4bd5273f96abc0e1a4ac6c04bddb1cb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474674
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79229}
Use class instead of lambda for static constexpr comparator (looks like
a bug in gcc).
Bug: chromium:1029379
Change-Id: I5caebacba2550bb206514f6e989d44361995f368
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3484315
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79228}
This is a reland of 1025bf26e3
Changes since revert:
- TSAN issue fixed by https://crrev.com/c/3475084
- Skip the shared-struct-workers test until shared GC deadlock is fixed,
being tracked in v8:12645
Original change's description:
> [shared-struct] Prototype JS shared structs
>
> Unlike the Stage 1 proposal, for simplicity the prototype does not add
> any new syntax, instead opting for exposing a SharedStructType
> constructor which takes an array of field names. This type constructor
> returns constructors for shared structs.
>
> Shared structs can be shared across Isolates, are fixed layout, have no
> prototype, have no .constructor, and can only store primitives and
> other shared structs.
>
> The initial prototype does not have TurboFan support.
>
> Bug: v8:12547
> Change-Id: I23bdd819940b42139692bcdb53d372099b0d4426
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3390643
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79156}
Bug: v8:12547
Change-Id: Ic1f5cf9fa9791ae2d5d5dc7c110614ca10b5d98e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3475078
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79215}
This CL refactors all remembered set logic from heap-base and
explicit-management to a new class OldToNewRememberedSet.
Bug: chromium:1029379
Change-Id: Id032b9dcc01af6f9bb9e546ed9bc6324da6d9b66
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3472498
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79212}
This reverts commit 1025bf26e3.
Reason for revert: https://crbug.com/v8/12645
Original change's description:
> [shared-struct] Prototype JS shared structs
>
> Unlike the Stage 1 proposal, for simplicity the prototype does not add
> any new syntax, instead opting for exposing a SharedStructType
> constructor which takes an array of field names. This type constructor
> returns constructors for shared structs.
>
> Shared structs can be shared across Isolates, are fixed layout, have no
> prototype, have no .constructor, and can only store primitives and
> other shared structs.
>
> The initial prototype does not have TurboFan support.
>
> Bug: v8:12547
> Change-Id: I23bdd819940b42139692bcdb53d372099b0d4426
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3390643
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79156}
Bug: v8:12547
Change-Id: I44f2b8bb7487b4d39ba1282585e0b2282501230f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474676
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79170}
Previously, V8_OS_MACOSX was, somewhat confusingly, also used for iOS.
With this CL, V8_OS_DARWIN will be set on both macOS and iOS,
V8_OS_MACOS only on macOS, and V8_OS_IOS only on iOS.
This CL also renames V8_TARGET_OS_MACOSX to V8_TARGET_OS_MACOS and
renames platform-xnu.cc to platform-darwin.cc.
Change-Id: I4bcafc7c337586662114144f6c7ccf47d978da1f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3468577
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79167}
Unlike the Stage 1 proposal, for simplicity the prototype does not add
any new syntax, instead opting for exposing a SharedStructType
constructor which takes an array of field names. This type constructor
returns constructors for shared structs.
Shared structs can be shared across Isolates, are fixed layout, have no
prototype, have no .constructor, and can only store primitives and
other shared structs.
The initial prototype does not have TurboFan support.
Bug: v8:12547
Change-Id: I23bdd819940b42139692bcdb53d372099b0d4426
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3390643
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79156}
The new shared memory API should only be used on macOS, but
platform-macos.cc was also included on iOS, causing build failures. This
CL splits platform-macos.cc into platform-xnu.cc (common code for macOS
and iOS) and platform-macos.cc (the macOS specific parts)
Bug: chromium:1218005
Change-Id: Iab332865ffd8990ddd246bb9c08802909464d7e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3468895
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79131}
LocalAllocator was already renamed to EvacuationAllocator some time ago.
Rename files now as well.
Bug: v8:10315
Change-Id: I337f693998aaf5187a5ba05842cdb2474837b68d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3463719
Auto-Submit: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79104}
.. to resolve the overloaded 'runtime' term and overall pick a more
meaningful name for this class. It's neither very related to runtime
(instead it's called periodically when the bytecode interrupt budget is
exhausted); nor is profiling its main purpose.
This class is responsible for controlling tiering decisions, hence the
new name 'TieringManager'.
Bug: v8:7700
Change-Id: Id6f1edf4ebe016d0d81903d0a13e0e1fe6e02142
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3463716
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79101}
Allows separating out the allocator from Heap without requiring a
heap.h include.
Drive-by:
- Rename "Retry" to "Failure".
- Avoid implicit constructors.
- Rename "RetrySpace" to "GarbageCollectionSpace" which is its only
use.
Bug: v8:12615
Change-Id: Idac17cded8f0b2b645a2be9045ab31ffd71999b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3456562
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79063}
The build flag is on by default and the actual functionality is guarded
by a runtime flag.
Bug: v8:12612
Change-Id: I6adbd5b766f502400af32eeeb035edca3a3606ef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3448383
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79036}
Replacement is v8::TracedReference in combination with v8::Global if a
callback is really needed.
Bug: v8:12603
Change-Id: Iae48fee2e6588a594d430c5f3a71ff0b3e67e5b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3439873
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78950}
This is a reland of 517ed4ad00
Original change's description:
> Reland "[Torque] Generalize Torque literals to larger size"
>
> Previously, literals in Torque were stored as double values, which
> made it impossible to precisely represent 64 bit integer values.
> This CL replaces the old literal expression with an integer and
> floating point literal expression that are unbounded in size. We
> allow implicit conversion of these literals to arbitary integer
> and floating point types respectively and insert a corresponding
> bounds check into generated CSA.
>
> Changes in the reland: Simplified IntegerLiteral to single digit.
>
> Bug: v8:7793, chromium:1289282
> Change-Id: I31c762c2f31165c7a1d0b07842b764e5851ce189
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3406750
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78811}
Bug: v8:7793, chromium:1289282
Change-Id: I7aadc4d2c9494f03eae85e94949c8f4cab7a075c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3437047
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78939}
Previously, when accessing SandboxedPointer fields with the sandbox
disabled, we would always do a ReadUnalignedValue/WriteUnalignedValue.
However, that is only necessary when pointer compression is enabled.
Otherwise, the field will be properly aligned.
This CL also factors out the logic to determine when to use an unaligned
or aligned read/write for a field into two new helper functions.
Bug: chromium:1292669
Change-Id: I2c1af187c5b2699101c3fee9cc551be788d3a845
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3429200
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78887}
This reverts commit 517ed4ad00.
Reason for revert: There still seems to be an issue on V8 Win msvc related to this CL (https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Win64%20-%20msvc/20568/overview).
Original change's description:
> Reland "[Torque] Generalize Torque literals to larger size"
>
> Previously, literals in Torque were stored as double values, which
> made it impossible to precisely represent 64 bit integer values.
> This CL replaces the old literal expression with an integer and
> floating point literal expression that are unbounded in size. We
> allow implicit conversion of these literals to arbitary integer
> and floating point types respectively and insert a corresponding
> bounds check into generated CSA.
>
> Changes in the reland: Simplified IntegerLiteral to single digit.
>
> Bug: v8:7793, chromium:1289282
> Change-Id: I31c762c2f31165c7a1d0b07842b764e5851ce189
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3406750
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78811}
Bug: v8:7793, chromium:1289282
Change-Id: I818cec9625fbd827a4a30088d8c8b759fb6c50d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3424484
Owners-Override: Nico Hartmann <nicohartmann@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78847}
Previously, literals in Torque were stored as double values, which
made it impossible to precisely represent 64 bit integer values.
This CL replaces the old literal expression with an integer and
floating point literal expression that are unbounded in size. We
allow implicit conversion of these literals to arbitary integer
and floating point types respectively and insert a corresponding
bounds check into generated CSA.
Changes in the reland: Simplified IntegerLiteral to single digit.
Bug: v8:7793, chromium:1289282
Change-Id: I31c762c2f31165c7a1d0b07842b764e5851ce189
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3406750
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78811}
Change-Id: Idce43801ef5f2f3e194a63cea3522eb6710b681e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3413192
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78758}
The external pointer table is now managed by the GC, which marks entries
that are alive during major GC, then sweeps the table afterwards to free
all dead entries and build a free list from them. For now, only major GCs
are supported, Scavenger GCs do not interact with the external pointer table.
In more detail, garbage collection of the external pointer table works
as follows:
1. The external pointer table now reserves a large region of virtual
address space for its backing buffer and is then never reallocated,
only grown in place until the maximum size is reached.
2. When the GC's marking visitor marks a HeapObject with an external
pointer as alive, it also marks the corresponding external pointer
table entry as alive. This can happen on a background thread.
3. For that, it uses the MSB of each entry in the table to indicate
whether the entry has been marked or not. This works because the MSB
is always cleared during the AND-based type check performed when
accessing an external pointer.
4. After marking, the external pointer table is swept while the mutator
is stopped. This builds an inline, singly-linked freelist of all
newly-dead and previously-free entries.
5. When allocating an entry from the table, the first entry on the
freelist is used. If the freelist is empty, the table grows,
populating the freelist with the new entries.
6. Every newly-allocated entry is marked as alive, and every store to an
existing entry also automatically marks that entry as alive (by also
setting the MSB). This simplifies the design of the table GC with
regards to concurrency (See ExternalPointerTable::Mark).
Bug: v8:10391
Change-Id: I8877fdf5576af3761bde65298951bb09e601bd14
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3359625
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78708}
