Prototype the instruction on the interpreter, and Arm64. Details of
instruction lowerings on all relevant architectures can be found at:
https://github.com/WebAssembly/relaxed-simd/issues/52
Bug: v8:12908
Change-Id: If8ffb82c38042191c67c9b5c23a231877d4f2159
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3679848
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Ilya Rezvov <irezvov@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80924}
This reverts commit c443858fa9.
Reason for revert: Several UBSan failures: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20UBSan/21547/overview
Original change's description:
> Allow lookup of matching scripts in Isolate compilation cache
>
> Currently, if the same script text is compiled multiple times with
> differing details (such as name, line number, or host-defined options),
> then multiple copies of that script are added to the Isolate's
> compilation cache. However, any attempt to look up those scripts can
> find only the first instance. This change makes the script compilation
> cache behave more consistently by checking the details while searching
> the hash table for a match, rather than after a potential match has been
> found.
>
> Bug: v8:12808
> Change-Id: Ic9da0bf74f359d4f1c88af89d585404f173056ee
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3671615
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#80919}
Bug: v8:12808
Change-Id: I6d007374fb607a2670ca260c6bd0d6774d7f51d7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3687311
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80922}
Currently, if the same script text is compiled multiple times with
differing details (such as name, line number, or host-defined options),
then multiple copies of that script are added to the Isolate's
compilation cache. However, any attempt to look up those scripts can
find only the first instance. This change makes the script compilation
cache behave more consistently by checking the details while searching
the hash table for a match, rather than after a potential match has been
found.
Bug: v8:12808
Change-Id: Ic9da0bf74f359d4f1c88af89d585404f173056ee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3671615
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80919}
Use the existing {base::Optional} instead of the extra {MaybeBoolFlag}
struct. This makes writing to a maybe-flag simpler because you just
write a boolean value and that automatically initializes the optional.
R=cbruni@chromium.org
Bug: v8:12887
Change-Id: I940d20286d65ba4355dc04b4b6068a306706f295
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3686412
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80915}
We introduce a typing phase into the Turbofan compilation pipeline for
wasm-gc. It has two functionalities: (1) to type nodes that were not
typed during code generation (mainly phi nodes) and (2) to narrow types
as much as possible.
The following nodes are handled, which should be enough for our
purposes: TypeGuard, WasmTypeCast, AssertNotNull, Phi, LoadFromObject,
and LoadImmutableFromObject.
Loop phi types are computed by first assigning the type of the
non-recursive input, and updating once we have the type of the recursive
inputs, and repeating this process to a fixed point.
Drive-by: Remove the narrowing of function signatures during wasm
inlining, as it created some issues and should not be needed after this
series of changes.
Bug: v8:7748
Change-Id: I8a72488d5c221c4ae8257fc5abf6f0368cf10e96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3678208
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80912}
Currently getting the following error with gcc 8.4,
including on x64 linux:
```
error: ':InterpreterState::scratch_' is used uninitialized in this function
```
Change-Id: I95ae848bf2503f6a0dac30254b19b08047b73cce
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3683104
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80901}
The fuzzer instantiates the module twice: Once for reference
interpretation / execution, and once for the actual execution of
Liftoff/TurboFan code.
For some reason, the two code paths for interpretation and Liftoff
reference execution used different patterns: Interpretation was using
the first instance, and then creating a second instance for actual
execution, whereas the Liftoff path used a second instance for the
reference execution and used the first one for the actual execution.
This CL refactors this to always create a "reference instance" first,
use that for either the interpreter or Liftoff, and then create a second
instance for the actual execution.
R=thibaudm@chromium.org
Bug: v8:12425
Change-Id: I19754264240d8570f00161abb7aecba1cc2b2ae0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3683323
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80900}
The OOB check belongs in ValidateIntegerTypedArray according to the
spec.
This also fixes the error types for OOB TypedArrays when doing Atomics:
OOB TypedArrays should get a TypeError, not RangeError.
Bug: v8:11111
Change-Id: Ice2e5695d69d84b2c20a4cf8f06880673d901a91
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3676859
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80898}
The fuzzers sometimes fail to instantiate a module that we already
instantiated before. This is nondetermistic and hard to reproduce (maybe
an out-of-memory situation).
Make the fuzzers print the error message so we learn more about those
failures.
R=ahaas@chromium.org
Bug: chromium:1330572
Change-Id: I0db103bdb113b1c1cedf662e02fb7a7f9d34ebd7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3680298
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80893}
This is a reland of commit ea9a1f1cbe
Changes since revert:
- Make the state field uintptr-aligned since arm64 faults on
atomic accesses to non-naturally aligned addresses.
Original change's description:
> [shared-struct] Add Atomics.Mutex
>
> This CL adds a moving GC-safe, JS-exposed mutex behind the
> --harmony-struct flag. It uses a ParkingLot-inspired algorithm and
> each mutex manages its own waiter queue.
>
> For more details, please see the design doc: https://docs.google.com/document/d/1QHkmiTF770GKxtoP-VQ1eKF42MpedLUeqiQPfCqus0Y/edit?usp=sharing
>
> Bug: v8:12547
> Change-Id: Ic58f8750d2e14ecd573173d17d5235a136bedef9
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3595460
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80789}
Bug: v8:12547
Change-Id: I776cbf6ea860dcc6cb0ac51694a9b584b53d255c
Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_mac_arm64_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3673354
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80875}
Modification is needed since after this CL:
https://crrev.com/c/3676642
Bug: v8:12781
Change-Id: Icb2644c9cd6f20e37c4b0ba0c4b861417c84b7f1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3679980
Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80871}
This CL introduces the following changes to the experimental
implementation of the object start bitmap, that is evaluated as
a mechanism for resolving inner pointers (behind the flag
v8_enable_conservative_stack_scanning):
- Manually iterate through page objects, instead of using the
PagedSpaceObjectIterator, for performance (avoid calling
MakeHeapIterable all the time) and to simplify the handling
of filler objects.
- Clear bits when reusing evacuated pages of the new space.
- Use the cage base to iterate correctly through code objects.
- Introduce a method for verifying the validity of the object
start bitmap.
- Minor fixes, additional checks and cleanup.
Bug: v8:12851
Change-Id: I245937ffe6f4b53c4c2dcf5126e8836aec4dc79e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3675099
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80869}
Remove code size and compilation time sampling for the "top tier
finished" event. With dynamic tiering, this event will never be reached.
R=ahaas@chromium.org
Bug: v8:12899
Change-Id: I1b0d053e31fe8cd1f8ba3b23bfff4c5879569b45
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647691
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80867}
This CL adds the serialization and deserialization
for properties in function. And we only support fast
properties in property array now.
Bug: v8:11525
Change-Id: If0bb3fee400ca957009d046ed74b92d8192c2514
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650675
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80858}
This CL fixes all spots where wasm Turbofan code did not satisfy the
invariant that all nodes with effect outputs are connected to another
node. Also, it enables the related verification for wasm code.
Drive-by:
- Simplify how stack checks are removed during loop unrolling.
- Fix a test declaration in test-gc.cc.
Change-Id: Id32af8584ba0ec281f4bf7757bd2915e6d8bf443
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3676862
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80854}
Some tests disabled dynamic tiering in order to actually serialize
TurboFan code. This makes the tests a bit simpler, but does not reflect
real-world usage.
This CL enables dynamic tiering in those tests and when needed executes
the code until tier-up was observed.
R=ahaas@chromium.org
Bug: v8:12899
Change-Id: I34cb8cedbc5908d9e6ca09d56c51609d0c8b2d6a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3660262
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80849}
This is a reland of a7d6bf9662
Added perfetto to unittests include_rules.
Bug: v8:12781
Change-Id: Iabf0e62abb1de879de21ba06fbd38f5432ee4f76
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652295
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80847}
The abstractions in this CL include:
1) Using EvacuatePrologue to handle age mark updating in
SemiSpaceNewSpace.
2) Using IsPromotionCandidate to check if a page contains
the current age mark.
3) EnsureCurrentCapacity instead of Rebalance.
4) Delegate page promotions in mark-compact.cc to the
NewSpace implementation.
Bug: v8:12612
Change-Id: Ied83261d661a8e61a11bf33b1d7a2103ac99a853
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644966
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80846}
The fuzzer runs the same wire bytes through the streaming decoder and
through synchronous compilation, and compares the result. In particular,
if one fails, then also the other should fail.
More checks for the result of both pipelines can be added later.
R=ahaas@chromium.org
Bug: v8:12922
Change-Id: I905adf740e581c4b7d0f4ab7c0d5d0e48d96fc4c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3675100
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80842}
Replace all usages of UPDATE_WEAK_WRITE_BARRIER with
UPDATE_WRITE_BARRIER. The barrier wasn't hot, so the additional branch
for the marking barrier shouldn't be a problem.
Performing the marking barrier could in theory cause more floating
garbage. However in this case the write barrier is only run once
directly after e.g. allocating a Code or NativeContext object. Since
UPDATE_WEAK_WRITE_BARRIER only skips the marking barrier, we should only
observe different behavior when marking is on. But since we already
have black allocation for objects in old space, we will not cause
additional floating garbage.
In case of performance regression, we should also be able to replace
those usages with SKIP_WRITE_BARRIER, since NativeContext and Code
objects are never allocated in the young generation, so running the
generational barrier shouldn't be necessary. It's just hard to DCHECK
that SKIP_WRITE_BARRIER is valid here.
Bug: v8:11708
Change-Id: I25d760a46d1d7ec973cc589f51ddf80ca3b5419d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3663080
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80839}
Mostly in comments, again, not much to be said...
Bug: v8:12425
Change-Id: I75b4b244e6fa259a29f6cf28bd8258b035af4be6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3673536
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80808}
This CL adds a moving GC-safe, JS-exposed mutex behind the
--harmony-struct flag. It uses a ParkingLot-inspired algorithm and
each mutex manages its own waiter queue.
For more details, please see the design doc: https://docs.google.com/document/d/1QHkmiTF770GKxtoP-VQ1eKF42MpedLUeqiQPfCqus0Y/edit?usp=sharing
Bug: v8:12547
Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_rel_ng
Change-Id: Ic58f8750d2e14ecd573173d17d5235a136bedef9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3595460
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80789}
This refactors ConvertToRelativeIndex into a clamping version and a
version that takes OOB labels for the upcoming implementation of
Array#with and TypedArray#with.
Also gets rid of the the "to" in the name, because these macros are
actually converting _from_ a relative index to an absolute one, not
the other way around.
Bug: v8:12764
Change-Id: I8bf1c16ce73008164acbd6b849f4259fb9315274
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3669655
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80786}
We introduce wasm types to Turbofan. They are represented by a new
subtype of {TypeBase}.
Types are attached to nodes during graph generation, as nodes are
assigned to wasm values. Therefore, phi nodes corresponding to merges
are not typed. Missing types will be computed, and assigned types will
be narrowed as much as possible, in a retyping phase that will be
introduced later.
Bug: v8:7748
Change-Id: I943559cf1d512edfab3bb2d22f8748c072cb1911
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3660248
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80778}
This reverts commit 5f0e7dd44f.
Reason for revert: Turns out this isn't true: https://source.chromium.org/chromium/chromium/src/+/main:v8/src/ic/ic.cc;l=946
Original change's description:
> [ic] Shadow smi_handler on LoadHandler to always be Smi
>
> StoreHandlers can store either a Code object or a Smi, so the
> smi_handler field on DataHandler is a Code|Smi. But, LoadHandlers can
> only store Smis here so add a shadowing smi_handler definition which
> only allows / returns Smis.
>
> Change-Id: Icc1c508db268950990b9c84b9e682b9a9b1f43e5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3663745
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Auto-Submit: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80775}
Change-Id: Ia2c14141ab5929be3ded883f0cecb40645a72dfd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3672419
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80776}
StoreHandlers can store either a Code object or a Smi, so the
smi_handler field on DataHandler is a Code|Smi. But, LoadHandlers can
only store Smis here so add a shadowing smi_handler definition which
only allows / returns Smis.
Change-Id: Icc1c508db268950990b9c84b9e682b9a9b1f43e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3663745
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80775}
The cctest test-code-generator/FuzzAssembleMove fuzzes codegen
for a random list of sequential moves by simulating the moves on a
FixedArray, and comparing the result to the output of the generated
code.
Add a variant of this test that resolves parallel moves first, to also
test integration with the gap resolver.
Bug: chromium:1313647
Change-Id: I02f385a957dafc89d91a4ab2216e0ac72147536d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3660252
Reviewed-by: Darius Mercadier <dmercadier@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80774}
Also remove useless comment in test-assembler-riscv64
Change-Id: I28451386449f15542b02383d8bf1aa9c4539469c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3669660
Auto-Submit: ji qiu <qiuji@iscas.ac.cn>
Reviewed-by: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#80768}
This test had been skipped since it was added in
4a416dbbe1.
Bug: v8:9380
Change-Id: I700f83fa4242baf44dd260fbc74520abf05101dd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3670052
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80766}
We inline array allocation for wasm-gc in the TF graph by using
AllocateRaw nodes. Additionally, we use memset to initialize large,
zero-initialized arrays. These changes give measurable speedup in some
benchmarks.
Bug: v8:7748
Change-Id: Icbd37d0fe673c673379139b96d0e1c175e95e357
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3666618
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80762}
Bug: v8:12868
Also adds the equivalent of Utf8Decoder, but for WTF-8.
Change-Id: I1548a44b0aea912cdd429eb85be4dfc606355cad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3660257
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80750}
The generated code checks if the receiver is a JS_API_OBJECT and if the
receiver requires an access check, and if not it lowers the call to an
API call.
We also add compilation dependencies on the protector cell to deopt if
our invariants change. (Note - the actual invalidation of these cells
will be implemented in a follow up CL)
Bug: v8:11321
Change-Id: I15722f1e5fac7176e292da4a35186e4609636aba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2719563
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80748}
Due to collections with inlined storage, Oilpan still supports on-stack
Members, which are always compressed if pointer compression is enabled.
This CL scans halfwords (together with full words) on stack to find
potential pointers. Since on-heap pointers can only be compressed and
in-construction objects always reside on heap, only halfwords need to be
scanned for them.
The alternative potential followup approaches:
1) Use a separate uncompressed type for pointer in inlined collections;
2) Dynamically register regions of stack containing compressed pointers.
Bug: chromium:1325007
Change-Id: Ia706fd8e7383d30aff11f4014faa9edd3d289a55
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644959
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80747}
This CL fixes an issue with async stacks. The async task stack is not
torn down between page navigations or reloads. The result is that
any new async tasks are stacked on top of the old pages async task
stack.
This was not prominent until now for two reasons:
1) Async tasks created in blink are always finished as long as
destructors have time to run.
2) When V8 is terminated while running the micro task queue also
all async tasks created for Promises (including `await`) are
cleaned up properly.
Introducing the stack tagging API made it more common for having
unfinished async tasks open outside the MTQ, which left the
async task stack non-empty during navigation.
This CL fixes this problem by clearing out all the async task
and async stack data structures for a context group when that
context group is reset.
R=bmeurer@chromium.org, victorporof@chromium.org
Fixed: chromium:1328785
Change-Id: Iee0c3c4a55f66e643829dae3726dc03c735da1dd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3666620
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80741}
This CL fixes a wrong assumption in the LiveEdit machinery. Namely
the assumption that every FunctionLiteral the parser finds, will have
a corresponding SFI created by the compiler. This assumption does not
hold in all cases. Inner functions that are never referenced by the
outer function don't get an SFI.
R=bmeurer@chromium.org
Fixed: chromium:1328453
Change-Id: I674f023f948954c1fcae04a4aa2afb69ea1642aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3663443
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80735}
Math between disparate enums is deprecated. Use constexprs instead.
This requires switching some caller code to work with the new non-enum
constants also.
Bug: chromium:1284275
Change-Id: Ifb3c8757ed62e2a0966120f830f0a7e282b53a16
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3661148
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80722}
Previously the LookupIterator ignores private symbols
(including private names) for the access check. This patch
removes these exceptions so that they are always checked.
Drive-by: removes the unused should_throw parameter in
Runtime::DefineObjectOwnProperty()
Bug: chromium:1321899
Change-Id: I9677b1e377f01d966daa1603eee1ed9535ffab92
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3623419
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80700}
Add an implementation of BranchIfInt32Compare, which is emitted whenever
a compare op is immediately followed by a branch.
Bug: v8:7700
Change-Id: I2c56d9de199bac8de33b33201f8614aee8e9894e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647693
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80694}
Bug: v8:12868
Also adds wtf8.cc, wtf8.h to src/wasm, to implement WTF-8 validation and
possibly other utilities. Also fixes a bug when parsing the string
literals section; I had misunderstood the way the unordered/ordered
sections mechanism worked.
Change-Id: I3c4205e0872379a69575f84ba33e0090a9d8d656
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652789
Commit-Queue: Andy Wingo <wingo@igalia.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80674}
Add Int32/Float64 nodes for:
* Subtract
* Multiply
* Divide
and additionally Int32 nodes for
* BitwiseOr/And/Xor
* ShiftLeft/Right/RightLogical
The latter ones don't have Float64 equivalents since they're implicitly
Int32 operations. In the future we'll add support for Number feedback by
adding Float64-to-Int32 conversions and using the Int32 nodes.
The divide node does an Int32 division and deopts if there's a remainder
to the division -- we may want to make it output a Float64 instead if we
think that's more likely in real-world code. There's also no peephole
optimisations for constant operations, which would generate much better
code, especially for shifts.
Bug: v8:7700
Change-Id: Ief1d24b46557cf4d2b7929ed50956df7b0d25992
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652301
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80670}
Original CL got reverted, this time the failing test should be fixed.
Bug: v8:12578
Change-Id: Id2d8801f07742e8b00884fefec8200e4270f4250
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3657434
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80668}
Enforce the parent context has a smaller id, this time more forcefully.
Bug: v8:11525,v8:12820
Change-Id: I05bf675545b81b818eebfcaa40ee6bb93f5bcf9e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652792
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80666}
Bug: v8:12868
A slight modification to the existing DFA-based UTF-8 allocator to allow
decoding surrogates, for use in decoding WTF-8. We'll need to
additionally constrain the decoder to disallow surrogate pairs.
Change-Id: Ifddbf08d4eeeff8f270df52a68f01769ea790eec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652787
Commit-Queue: Andy Wingo <wingo@igalia.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80654}
This is a reland of commit a76072217a
The bug exposed by landing this change the first time has been fixed
separately in https://crrev.com/c/3654413 .
Original change's description:
> Disable recompilation of existing Scripts from Isolate compilation cache
>
> My previous change https://crrev.com/c/3597106 led to some performance
> regressions in time spent on parsing and compilation. This change
> disables the ability to recompile an existing uncompiled Script, as an
> attempt to both fix the regressions and isolate which part of the
> previous change was the cause of those problems.
>
> Bug: v8:12808, chromium:1325566, chromium:1325567, chromium:1325601
> Change-Id: Ifa086bf27070da8f4b3c0e4415af5ca7b6706b0a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652252
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#80616}
Bug: v8:12808, chromium:1325566, chromium:1325567, chromium:1325601
Change-Id: Ib31864bef90ff3340d1dfd4e25e21bef121f2d49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3655011
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80645}
Triggering tier-up can happen very often, so the runtime function should
be as slim as possible.
This CL adds two DisallowGarbageCollection scopes and removes a
HandleScope which was unnecessarily created.
R=jkummerow@chromium.org
Bug: v8:12281
Change-Id: I43e7f2b449630856ac8dfb36d294fbd29191d0eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652300
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80644}
Part of the improve error messages initiative.
Based on a resource of JSON.parse() errors found at
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse
added support for:
- 'Bad control character in string literal'
- 'Bad Unicode escape'
Previously JSON.parse('"a\bz"') would output:
SyntaxError: Unexpected token in JSON at position 2
Now the output is:
SyntaxError: Bad control character in string literal in
JSON at position 2
Previously JSON.parse("[\"\\t\\u") would output:
SyntaxError: Unexpected end of JSON input
Now the output is:
SyntaxError: Bad Unicode escape in JSON at position 6
Bug: v8:6551
Change-Id: I3ba5450c41b8a388643a15bc58e4e3fc75855d13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652254
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Issack John <issackjohn@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80642}
As a follow-up to https://crrev.com/c/3625835, document how we
internally encode Wasm opcodes in the WasmOpcode enum. In particular,
it's important for the mapping to be bijective.
R=thibaudm@chromium.orgCC=gdeepti@chromium.org
Bug: v8:12284
Change-Id: Ic4bcd70211e83b1eabb45204bdcce3209a4432b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647360
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80635}
If b is S128Zero, Shuffle(a,b,s) can be optimized to
Swizzle(a,s). By setting s[i] to 0x80, we can avoid access b.
If a is S128Zero, we can swap a and b first.
If one input of I8x16Shuffle is S128Zero, this patch can save
~60% instructions(7 of 12), and more than 30% improvement is
observed in local microbenchmarks.
Change-Id: I5953fa9064e01203cd4cf423c55dd5ed33cad57e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3544992
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Jie Pan <jie.pan@intel.com>
Cr-Commit-Position: refs/heads/main@{#80623}
Goal is to keep the tree green while the issue is investigated.
No impact on shipped product since shared-memory is flag-guarded off.
Bug: v8:12883
Change-Id: I9a434bdebc781023fa6693eef47db6dbe81cd4bb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3653320
Auto-Submit: Adam Klein <adamk@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80619}
This reverts commit a76072217a.
Reason for revert: fails on GC Stress bot:
https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20gc%20stress/38512/overview
Original change's description:
> Disable recompilation of existing Scripts from Isolate compilation cache
>
> My previous change https://crrev.com/c/3597106 led to some performance
> regressions in time spent on parsing and compilation. This change
> disables the ability to recompile an existing uncompiled Script, as an
> attempt to both fix the regressions and isolate which part of the
> previous change was the cause of those problems.
>
> Bug: v8:12808, chromium:1325566, chromium:1325567, chromium:1325601
> Change-Id: Ifa086bf27070da8f4b3c0e4415af5ca7b6706b0a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652252
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#80616}
Bug: v8:12808, chromium:1325566, chromium:1325567, chromium:1325601
Change-Id: I0f56163856d04ff49da96b0fb344fb59b5501a40
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3653273
Auto-Submit: Adam Klein <adamk@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80617}
My previous change https://crrev.com/c/3597106 led to some performance
regressions in time spent on parsing and compilation. This change
disables the ability to recompile an existing uncompiled Script, as an
attempt to both fix the regressions and isolate which part of the
previous change was the cause of those problems.
Bug: v8:12808, chromium:1325566, chromium:1325567, chromium:1325601
Change-Id: Ifa086bf27070da8f4b3c0e4415af5ca7b6706b0a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652252
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80616}
This is a follow-up CL to https://crrev.com/c/3623542.
When updating pointers during a full GC, a page might not be swept
already. In such cases there might be invalid objects in free memory.
Since these objects might be dead, their maps might have been reclaimed
already as well.
The previous CL cached the size of invalid objects in order to avoid
accessing an invalid object's map. However, as soon as a slot is within
an invalid object, we also need to check whether this slot is still a
tagged pointer which would require map access. This CL checks marking
bits on invalid objects to skip that check on such invalid objects.
Bug: v8:12578, chromium:1316289
Change-Id: Ie1d736f897a2994dbed7bfb95ed37732cd3b0882
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3596123
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80609}
Split off a TurbofanFrame from OptimizedFrame, and make MaglevFrame a
subclass of OptimizedFrame. This allows it to be treated as an optimized
frame by code that is looking at deoptimization data.
Bug: v8:7700
Change-Id: Ia38e0f1c2cd73f054f63be81dff187d9197c1202
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644798
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80592}
Loading from/storing to the same field with incompatible mutabilities
is possible in unreachable code, specifically when a value is cast to
two different types with incompatible mutability for the same field
offset. Therefore, we allow this pattern in CsaLoadElimination.
When we detect it, we emit an Unreachable node to immediately crash the
program in case this unreachable code is somehow executed.
Bug: v8:7748, v8:12874
Change-Id: Ieb359d3e1b9f7bc4a91c556af2bba0507526d20e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644806
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80587}
Part of the improve error messages initiative.
Based on a resource of JSON.parse() errors found at
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse
Previously JSON.parse(NaN) would output:
SyntaxError: Unexpected token N in JSON at position 0
Now the output is:
SyntaxError: "NaN" is not valid JSON
Previously JSON.parse("{a:1}") would output:
SyntaxError: Unexpected token a in JSON at position 1
Now the output is:
SyntaxError: Expected property name or '}' in JSON at position 1
Bug: v8:6551
Change-Id: Ic9fad1fdbd295e1302805b81e6603fc526121960
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3513684
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Issack John <issackjohn@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80567}
This adds a new struct "OOMDetails" which is passed to the
OOMErrorCallback. It currently holds the "is_heap_oom" bool that was
also passed before, plus an optional "detail" string.
The struct can later be extended without having to change the signature
of the OOMErrorCallback. Removing fields will have to follow the
standard deprecation rules, but this is also easily possible without the
hassle for this initial change.
We modify the deprecated OOMErrorCallback definition and un-deprecate it,
which can be seen as removing a deprecated API and adding a new one in
one CL.
R=mlippautz@chromium.org, jkummerow@chromium.org
Bug: chromium:1323177
Change-Id: Ic4c2cb5856906ebd664626fe463d8e96cb99b0a5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647827
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80565}
Mostly in comments, not much to be said...
Bug: v8:12425
Change-Id: Ib1e4d3913f9b91eeafefbef13330fd1388223c06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650597
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80562}
A few of LogTests have been crashing intermittently
after they were moved to unittests in this CL:
https://crrev.com/c/3616424
Will re-enable once issue is investigated.
Change-Id: I53435596274c935c028a625b610c54eadda9d1de
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647092
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80551}
We currently have a BitVector implementation which is used a lot by the
two (mid-tier and top-tier) register allocators. Their size is the
number of virtual registers or the number of blocks in the function. If
one of those numbers gets huge, the BitVector does not perform well any
more, and it consumes huge amounts of memory (we see up to several GBs
for huge Wasm functions).
This CL introduces a SparseBitVector implementation with a compatible
interface, meant to replace the BitVector implementation. Usages will be
introduced in follow-up CLs, first for the mid-tier allocator, then
top-tier. This will allow us to assess performance changes better, and
revert individual usages.
R=mslekova@chromium.org
Bug: chromium:1313379, v8:12780
Change-Id: I804311e0c188526961f70e88a43dd1ea26497cda
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3634780
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80546}
Bug: v8:12868
This wires up the parser and the decoder interface for stringref. All
of the interfaces throw UNIMPLEMENTED, however.
Change-Id: If8cb131032e425a5672f793c6e4c24ddd188aebc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3645115
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80545}
This is a reland of commit 2b79eefed3
A DCHECK was using map[key] and inadvertently inserted into the map
that way.
Original change's description:
> Reland^2: [heap] Store size with invalidated object
>
> This is a reland of commit 23b2d571a7
>
> When updating pointers during a full GC, a page might not be swept
> already. In such cases there might be invalid objects and slots
> recorded in free memory. Updating tagged slots in free memory is fine
> even though not strictly necessary.
>
> However, the GC also needs to calculate the size of potentially dead
> invalid objects in order to be able to check whether a slot is within
> that object. But since that object is dead, its map might be dead as
> well which makes size calculation impossible on such objects. The CL
> changes this to cache the size of invalid objects. A follow-up CL will
> also check the marking bit of invalid objects.
>
> Reason for reverts:
>
> Revert #2: In-object slack tracking on JSObjects doesn't update the
> cached size of invalidated objects. The fix here was to stop
> invalidating recorded slots on JSObjects at all and avoid that problem
> completely (see https://crrev.com/c/3620274).
>
> Revert #1: Not all size changes go through NotifyObjectLayoutChange, so
> https://crrev.com/c/3607992 introduced NotifyObjectSizeChange as a
> bottleneck for object size changes/right-trimming. This method is
> now used to update the size of invalidated objects.
>
> Bug: v8:12578, chromium:1316289
> Change-Id: I0478d04601c0270ddb39419ca6cf98719951eb4d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3623542
> Reviewed-by: Jakob Linke <jgruber@chromium.org>
> Reviewed-by: Patrick Thier <pthier@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80344}
Bug: v8:12578, chromium:1316289
Change-Id: Ibcc04c209213c584860a7c473082526cb4e53c59
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3627635
Reviewed-by: Patrick Thier <pthier@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80542}
This CL adds to the existing experimental implementation of the
object start bitmap, that is evaluated as a mechanism for resolving
inner pointers (behind the flag v8_enable_conservative_stack_scanning).
It fixes method ObjectStartBitmap::FindBasePtr to ensure that the
correct base pointer is returned, even if the bitmap is not fully
populated (e.g., with object evacuation or inline object allocation).
This method now recalculates the part of the bitmap that is
required for returning the correct result, by iterating through
objects of the page. A special constructor has been introduced to the
PagedSpaceObjectIterator for this purpose.
It also moves the existing inline methods of ObjectStartBitmap to a
new -inl.h header file, to avoid circular dependencies.
Bug: v8:12851
Change-Id: Iabd0df020bee3bb63ef9d4888591b25d24d79dd9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3641179
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80538}
This is a reland of commit 8278cb5015
The reland adds the RestartFrameTrampoline to the list of
builtins that the deoptimizer is allowed to return from for
control flow integrity.
Original change's description:
> [inspector] Re-enable Debugger#restartFrame
>
> Doc: https://bit.ly/revive-restart-frame
>
> This CL "undeprecates" Debugger#restartFrame and adds a new optional
> "mode" parameter for back-wards compatibility. Moreover, the return
> values are all deprecated. They were never actually used in the
> DevTools frontend and the same information is available from the
> Debugger#paused event that fires once execution stops at the
> beginning of the restarted function.
>
> The CL also re-baselines all the restart-frame inspector tests that
> now run successfully.
>
> R=bmeurer@chromium.org, kimanh@chromium.org
>
> Bug: chromium:1303521
> Change-Id: I34bddeb1f2f4ff3dee58dd82e779c111495566f3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3616505
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
> Commit-Queue: Simon Zünd <szuend@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80491}
Bug: chromium:1303521
Change-Id: I13e2f8b5011795a38e541310622b8333a3d08049
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644624
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80534}
MSVC does not implicitly convert the std::array iterator to a char*,
hence explicitly use the {data()} accessor instead of {begin()}, which
is cleaner anyway.
R=mlippautz@chromium.org
Bug: chromium:1323177
Change-Id: I65c6836889eb57a18b655cb9e6c98008a8fbcaac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644794
Auto-Submit: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80533}
This test tests the interpreted/baseline and optimized behaviour of cpu
profiler ticks. We should eventually support this for maglev too, but
for now just disable it.
Bug: v8:7700
Change-Id: Iba89ab2c718025ebf90c86a84ed937c2d1d0af7f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647363
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80531}
This is more consistent with similar features, for example
V8_ENABLE_WEBASSEMBLY or V8_ENABLE_MAGLEV.
Drive-by: remove V8_SANDBOX_IS_AVAILABLE as it's no longer needed.
Bug: v8:10391
Change-Id: I8658c5b0c331a4c73892737083b2c2f9b8f84056
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/+/3647355
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Samuel Groß <saelo@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80530}
This introduces a class which can be used for formatting dynamic values
into a constant-size, stack-allocated array. You get ostream-style code
but printf-style performance, and in particular no dynamic allocation.
This makes this class also suitable to be used in OOM or other fatal
situations where we cannot rely on dynamic memory allocation to still
work.
Using FormattedString will automatically compute the format string
depending on the types. It also computes the maximum size of the output.
Last but not least, it makes the code a lot more readable than
traditional printf style printing.
R=mlippautz@chromium.org
Bug: chromium:1323177
Change-Id: I47228b3603c694c1fa23516dd3f1c57e39c0ca35
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644622
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80529}
Now that we require C++17 support, we can just use the standard
static_assert without message, instead of our STATIC_ASSERT macro.
R=leszeks@chromium.org
Bug: v8:12425
Change-Id: I1d4e39c310b533bcd3a4af33d027827e6c083afe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647353
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80524}
With this CL, the decompression simply becomes:
movsxd rax, edi
add rax, rax
and rax, qword ptr fs:[base@TPOFF]
Bug: chromium:1325007
Change-Id: I931e4e667a9b9697671bccf14575420f8cb705e8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629871
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80521}
With caged heap enabled, we can halve Member<> by storing only the least
significant half. The base of the heap is stored in a thread local
variable. The feature has therefore an implication that only single heap
is allowed per thread.
The feature is gated by the new GN arg:
cppgc_enable_pointer_compression.
Bug: chromium:1325007
Change-Id: Ic7f1ecb7b9ded57caad63d95bbc8e8ad6ad65031
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2739979
Reviewed-by: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80518}
Spec text:
https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.erahttps://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.erayear
Notice this only implement the "iso8601" calendar and we will implement the
code for other calendar later by calling ICU with other Calendar methods.
This CL reduce the differences of testing result between ALWAYS and no_i18n
because the code in no_i18n will not call Calendar era or eraYear and therefore
passed the test even w/o this CL but the ALWAYS tests will cause Temporal
object to internal call era and eraYear and therefore fail if w/o this CL.
Bug: v8:11544
Change-Id: I921fbfbbd26473c238024161eb58b096c38b881b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3641938
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80513}
This CL adds two experimental JS builtins to convert between
i16 Wasm GC and JS strings. This is a non-standard experimental
feature only available with the flag --wasm-gc-js-interop.
WebAssembly.experimentalConvertArrayToString(array, start, count)
Convert the `count`-many WTF-16 code units starting at index `start`
into a JS string. Throws a TypeError if `array` is not an i16 array,
or if `start` and `count` are not numbers or not in range.
WebAssembly.experimentalConvertStringToArray(string, sampleArray)
Convert `string` to an i16 array. The `sampleArray` parameter needs
to be an arbitrary i16 array, which is only used to extract the rtt.
Throws a TypeError if `string` is not a string or `sampleArray` is not
an i16 array.
Change-Id: I7ac2f6bd89b8f638427f61da1bb01ccba90d735b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3642301
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80505}
This reverts commit 8278cb5015.
Reason for revert: breaking https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20CFI/10778/overview
Original change's description:
> [inspector] Re-enable Debugger#restartFrame
>
> Doc: https://bit.ly/revive-restart-frame
>
> This CL "undeprecates" Debugger#restartFrame and adds a new optional
> "mode" parameter for back-wards compatibility. Moreover, the return
> values are all deprecated. They were never actually used in the
> DevTools frontend and the same information is available from the
> Debugger#paused event that fires once execution stops at the
> beginning of the restarted function.
>
> The CL also re-baselines all the restart-frame inspector tests that
> now run successfully.
>
> R=bmeurer@chromium.org, kimanh@chromium.org
>
> Bug: chromium:1303521
> Change-Id: I34bddeb1f2f4ff3dee58dd82e779c111495566f3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3616505
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
> Commit-Queue: Simon Zünd <szuend@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80491}
Bug: chromium:1303521
Change-Id: Ibc33328c31a4b6ea736d07ce5e5ee109039eec8b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3645767
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80495}
The IsValidSectionCode function shouldn't include internally-used
numeric identifiers of well-known optional sections.
Fixed: v8:12867
Change-Id: I9d894ee57157455e92a17ddcde94f32f05fb038d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644612
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80494}
Doc: https://bit.ly/revive-restart-frame
This CL "undeprecates" Debugger#restartFrame and adds a new optional
"mode" parameter for back-wards compatibility. Moreover, the return
values are all deprecated. They were never actually used in the
DevTools frontend and the same information is available from the
Debugger#paused event that fires once execution stops at the
beginning of the restarted function.
The CL also re-baselines all the restart-frame inspector tests that
now run successfully.
R=bmeurer@chromium.org, kimanh@chromium.org
Bug: chromium:1303521
Change-Id: I34bddeb1f2f4ff3dee58dd82e779c111495566f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3616505
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80491}
Hexadecimal/octal/binary BigInt property names should be converted
to decimal, i.e. the following object literals should all be equivalent:
var o = {0xF: 1}, p = {0xFn: 1}, q = {15: 1}, r = {15n: 1}.
Test case by yangwenming@bytedance.com, uploaded at
https://chromium-review.googlesource.com/c/v8/v8/+/3634937
Fixed: v8:10600
Change-Id: Ie1d8a16e95697cd31cbc0784843779c921ce91fa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3642302
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80490}
This CL introduces SideEffectDetectorScope which requires explicit
allowlisting of cases when side effects are allowed after calling
interceptor callbacks.
Side effects are not allowed when the callback does not intercept
the request.
The side effects detector is not enabled yet, it will be enabled in
a follow-up CL.
Bug: chromium:1310062
Change-Id: I805764920ed016cb37390aef7bb02cbdf5f72846
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3641172
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80484}
NewSpace is renamed to SemiSpaceNewSpace and NewSpaceBase is renamed to
NewSpace (the new PagedSpace new space implementation will be named
PagedNewSpace).
Most usecases are updated to use the base class rather than the concrete
semi space based implementation. To that end, the base class is extended
with additional virtual methods (for delegating to the concrete class).
This CL follows these guidelines:
(*) If at a method callsite we should know the exact new space
implementation we use, we cast to the concrete class. This is the case
for example for callsites in scavenger.*.
(*) If a method is called from outside the heap implementation or should
be present regardless of the concrete implementation, that method is
made virtual.
(*) Other cases are usually methods that are specific to a concrete
implementation but the concrete implementation is not known at the
callsite and there's no clear way to nicely abstract the method. In such
cases we cast to the concrete SemiSpaceNewSpace implementation for now
and we will revisit these cases once PagedNewSpace exists.
Bug: v8:12612
Change-Id: I7b85626774ce0d785b0257bf8d32b9f50eeaf292
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3625975
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80482}
Prototype the instruction on the interpreter, and Arm64. Details of
instruction lowerings on all relevant architectures can be found at:
https://github.com/WebAssembly/relaxed-simd/issues/40
Bug: v8:12284
Change-Id: Id4cb3889d94cf0bb7169ea068efe5ca68cfcbad9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3636365
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80475}
Once the root SharedFunctionInfo for any Script gets its bytecode
flushed, the Isolate's compilation cache currently evicts that entry, to
reduce memory usage. However, the associated Script is likely still
alive, since scripts often declare functions which outlive the initial
evaluation of the script. If an identical script is loaded later, a
duplicate Script is created for it, which can waste memory.
In this change, I propose that the compilation cache keys can refer
weakly to the Script. When the root SharedFunctionInfo gets old, instead
of deleting the cache entry entirely, we can just drop the strong
reference to the SharedFunctionInfo. A subsequent lookup in the cache
will retrieve the Script instead of the root SharedFunctionInfo,
indicating an opportunity to save some memory by reusing the existing
Script.
Eventually, all callers to CompilationCache::LookupScript should reuse
the Script if possible. This change implements only the easy case of
reusing the Script for synchronous parsing. Follow-up changes will be
required for the TODO comments left by this change.
Bug: v8:12808
Change-Id: Ia8b0389441a682de9a43e73329049fd2e7835d3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3597106
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80472}
This adds a non-standard, unsafe instruction for performance
experiments: ref.cast_nop_static behaves like ref.cast_static
as far as static types are concerned, but emits no code.
Bug: v8:7748
Change-Id: Ic5797a941146a06d7c6ff249d8e29919145d8ea1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3639206
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80471}
The issue is that a thread_local variable used in RwxMemoryWriteScope
can't be directly accessed from another component, so the workaround is
to avoid inlining accesses the variable into other components.
Bug: v8:12797, chromium:1324333
Change-Id: I0f83358ac0c663c92ef7b3dff54a068472d61aed
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3641169
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80470}
This CL adds the array type flag to distinguish between
sparse array and dense array and adds serialization
and deserialization for sparse array.
Bug: v8:11525
Change-Id: Ia302af017d6f52924256a2b3fa9e3d2b34caa442
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629739
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80449}
In some cases we were still trying to change permissions of RWX pages
which is not allowed.
Bug: v8:12797
Change-Id: I9f4ca319d842c524fc6f60bfd3bb3726f8d3029d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3635719
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80442}
Add new opcode numbers for relaxed-simd opcodes as in:
https://github.com/WebAssembly/relaxed-simd/pull/61, and updates
for decoded opcodes larger than two bytes.
Bug: v8:12284
Change-Id: I0bff22812243a39599bfeee3c0bc69171dd3c7d2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3625835
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80432}
Builtins are not snapshotted, but instead we insert "builtin wrappers"
into the snapshot, and create references to the corresponding builtin
when deserializing.
Subclassing builtins will be implemented in a follow-up CL.
First version: https://chromium-review.googlesource.com/c/v8/v8/+/3630080
Fix: initialize builtin_objects_handle_
Bug: v8:11525,v8:12820
Change-Id: Ia2b5d41af5d7f577f1b02356b22a8760963009e4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3635718
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80430}
Many uses of "volatile" are deprecated in C++20 because they don't
actually do anything. Remove "volatile" in these cases.
Bug: chromium:1284275
Change-Id: I64a3989d73f25e0cd933375dd6fa0b3f2b3acb54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3630343
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80428}
Builtins are not snapshotted, but instead we insert "builtin wrappers"
into the snapshot, and create references to the corresponding builtin
when deserializing.
Subclassing builtins will be implemented in a follow-up CL.
Bug: v8:11525,v8:12820
Change-Id: If72695d46bdfc8bf7e477471be1264b668551854
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3630080
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80419}
Allocation granularity (8 bytes on 64bit platforms) is already subsumed
by whatever range size we choose.
Bug: chromium:1029379
Change-Id: Iab95e6f36955c9ffbbe9ea0c98cb9d1f8dd0337b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629869
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80415}
This is deprecated in C++20. Use constexprs and explicit casts to work
around.
Bug: chromium:1284275
Change-Id: I6a3974f3c678cb797081938622036a12a99c5d1b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3630349
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80392}
- Repurpose flag `treat_global_objects_as_roots` when taking a heap
snapshot for toggling whether internals should be exposed (to
`hide_internals`).
- Use the toggle in creating heap snapshots for exposing class names
as object names for C++ objects that have not explicitly been given a
name.
Change-Id: I77d71babfdfe53269964fe81ed985037a431c28b
Bug: chromium:1321620
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3623740
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80391}
Change-Id: I88a1bbddc7604fc5e557ae875ca196cf9c46574c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3626453
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Neden Wang <nedenwang@tencent.com>
Cr-Commit-Position: refs/heads/main@{#80390}
In C++20, u8"" generates a const char8_t*, not a const char*. Since ""
accepts UTF-8 already, just switch to it.
Bug: chromium:1284275
Change-Id: I873321a62a4d9e32b3b463913a3bc10231db3db3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3630347
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80382}
1. Move the use of MAYBE_RETURN to MAYBE_ASSIGN_RETURN_ON_EXCEPTION_VALUE
if possible.
2. Remove some MYABE_RETURN in the wrong spot and therefore fix some tests.
3. Change Intl::GetTimeZoneIndex() to return Maybe<int32_t> as index and use
< 0 value to indicate not getting index to make the function signature
simpler.
Bug: v8:11544
Change-Id: I685cbff142e9dea69ef316a1bc180730aef5aec8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3625839
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80379}
This prevents ambiguity errors in C++20 due to ADL when casting types in
std::, which gains std::bit_cast<>().
Bug: chromium:1284275
Change-Id: I25046d1952a9304852e481ad8b84049c6769c289
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3625838
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80378}
This is a reland of commit 507fa4d7f5
This CL moves the NewJSObjectFromMap after deserializing object properties with dictionary map and fixes the DCHECK failure in JSReceiver::HasFastProperties when triggering GC.
Original change's description:
> [web snapshot] Add support for object with dictionary mode
>
> This CL adds the serialization support for object properties
> with dictionary map. Shape id is used to distinguish between if the object has dictionary map. And add TODO to support “no map objects” which can have fast map and “objects with map” which needs to be turned to dictionary mode.
>
> Bug: v8:11525
> Change-Id: If3eb4195115a41d4a3f6cc7372924b982ca96fc1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3621593
> Commit-Queue: 王澳 <wangao.james@bytedance.com>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80366}
Bug: v8:11525
Change-Id: I88422d698aa03fb7d3b21b5709eec2d0cf306256
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629738
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80374}
Based on the robust test suite for checking property "has/in" queries, with the intention
of measuring the performance of accessing getOwnPropertyDescriptor.
Background: getOwnPropertyDescriptor and defineProperty were identified as hot code taking up
a significant chunk of startup time in a customer application. This benchmark aims to measure
the difference made by a modifying Object.getOwnPropertyDescriptor.
By current measurements, the geometric mean time of the new version is typically 1/6 that of
the current upstream implementation, using this test specifically (however, only on arm64 /
Apple M1... On Linux/x64, the results look more reasonable at a roughly 5-12% improvement in
score).
In its current form, this benchmark does very little to attempt to verify the results of the
object, which may result in branches being discarded in Turbofan (but given the enormous
difference between x64 and arm64, I'm not positive this is what is happening, and have not yet
verified this).
BUG=
Change-Id: I0f10735315313ed97efd00fcccaedc1272d4d314
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3624979
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80373}
Consider the following
* A ValueNode has inputs A and B
* Input A has later uses, input B doesn't
* The ValueNode's result must be in the same register as A
It can then happen that UpdateUses frees B, and the result allocation
emits a gap move from A's register to B's old register (now free) to
preserve the value of A when the ValueNode writes into its register.
This gap move is emmitted before the ValueNode start, which means that
it clobbers B.
Now, UpdateUses only clears registers _after_ node result allocation, so
that the known free registers are still the ones before updating uses.
Done naively, this would have bad consequences -- in the case where A
has no later uses, it would still force the regalloc to save its value
thinking that it is still live. So, this patch also introduces a concept
of "AllocationStage" where we're either allocating at the start or end
of a Node. Inputs are allocated at the start, results at the end. When
walking registers during an allocation, nodes whose lifetimes end at the
current node are considered to be dead at the "end" allocation stage,
and we are allowed to a) use their registers, and b) drop them without
preserving their value.
Bug: v8:7700
Change-Id: I5ca764ed04b12269f189577e81eb7e2a27cd1b09
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3625978
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80371}
This reverts commit 507fa4d7f5.
Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20gc%20stress/38308/overview
Original change's description:
> [web snapshot] Add support for object with dictionary mode
>
> This CL adds the serialization support for object properties
> with dictionary map. Shape id is used to distinguish between if the object has dictionary map. And add TODO to support “no map objects” which can have fast map and “objects with map” which needs to be turned to dictionary mode.
>
> Bug: v8:11525
> Change-Id: If3eb4195115a41d4a3f6cc7372924b982ca96fc1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3621593
> Commit-Queue: 王澳 <wangao.james@bytedance.com>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80366}
Bug: v8:11525
Change-Id: I0d236a9937a5942b387553a61991716321b063e6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629541
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Nico Hartmann <nicohartmann@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Owners-Override: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80368}
This CL adds the serialization support for object properties
with dictionary map. Shape id is used to distinguish between if the object has dictionary map. And add TODO to support “no map objects” which can have fast map and “objects with map” which needs to be turned to dictionary mode.
Bug: v8:11525
Change-Id: If3eb4195115a41d4a3f6cc7372924b982ca96fc1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3621593
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80366}
