Skip to content

V
V8
Switch branch/tag
  1. 26 Jul, 2022 15 commits
  3. 25 Jul, 2022 25 commits
    • Deepti Gandluri's avatar
      Revert "[heap] Refactor methods and nested class of ConcurrentMarkingVisitor" · ad2b6a83
      Deepti Gandluri authored 
      This reverts commit 6925bc09.

Reason for revert: Speculative revert for roll failures: https://ci.chromium.org/ui/p/chromium/builders/try/linux_optional_gpu_tests_rel/85744/overview

Original change's description:
> [heap] Refactor methods and nested class of ConcurrentMarkingVisitor
>
> This CL moves a few methods and nested class SlotSnapshottingVisitor
> from ConcurrentMarkingVisitor to ConcurrentMarkingVisitorUtility.
>
> Methods in ConcurrentMarkingVisitorUtility are now static and instead have a Visitor parameter.
>
> This is preparatory work for adding a
> YoungGenerationConcurrentMarkingVisitor class, which will be able to
> reuse members of ConcurrentMarkingVisitorUtility.
>
> Bug: v8:13012
> Change-Id: I503c20e655578031018a2e37dd92c1d61bbe1686
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3779677
> Commit-Queue: Leon Bettscheider <bettscheider@google.com>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81931}

Bug: v8:13012
Change-Id: If2240b2e0769b04d752caefceb95609c6b950bb2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3787373
Owners-Override: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81945}
      ad2b6a83
    • Deepti Gandluri's avatar
      Revert "cppgc: Move forward Trace(T*) deprecation" · 52bc4db6
      Deepti Gandluri authored 
      This reverts commit 0609bb83.

Reason for revert: Speculative revert for roll fails: https://ci.chromium.org/ui/p/chromium/builders/try/linux_optional_gpu_tests_rel/85744/overview

Original change's description:
> cppgc: Move forward Trace(T*) deprecation
>
> Bug: v8:13089
> Change-Id: I271addd3a80feaa40520ab2768a2380c3d7ab62f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780821
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81939}

Bug: v8:13089
Change-Id: Ic9c0389b1b579821f089dddee7e604d81244a108
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785446
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Owners-Override: Deepti Gandluri <gdeepti@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81944}
      52bc4db6
    • Deepti Gandluri's avatar
      Revert "Background merging of deserialized scripts" · 44fc1fda
      Deepti Gandluri authored 
      This reverts commit e895b7af.

Reason for revert: TSAN failures: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20stress-incremental-marking/8468/overview

Original change's description:
> Background merging of deserialized scripts
>
> Recently, https://crrev.com/c/v8/v8/+/3681880 added new API functions
> with which an embedder could request that V8 merge newly deserialized
> script data into an existing Script from the Isolate's compilation
> cache. This change implements those new functions. This functionality is
> still disabled by default due to the flag
> merge_background_deserialized_script_with_compilation_cache.
>
> The goal of this new functionality is to reduce memory usage when
> multiple frames load the same script with a long delay between (long
> enough for the script to have been evicted from Blink's in-memory cache
> and for the top-level SharedFunctionInfo to be flushed). In that case,
> there are two Script objects for the same script: one which was found in
> the Isolate compilation cache (the "old" script), and one which was
> recently deserialized (the "new" script). The new script's object graph
> is essentially standalone: it may point to internalized strings and
> readonly objects such as the empty feedback metadata, but otherwise
> it is unconnected to the rest of the heap. The merging logic takes any
> useful data from the new script's object graph and attaches it into the
> old script's object graph, so that the new Script object and any other
> duplicated objects can be discarded. More specifically:
>
> 1. If the new Script has a SharedFunctionInfo for a particular function
>    literal, and the old Script does not, then the old Script is updated
>    to refer to the new SharedFunctionInfo.
> 2. If the new Script has a compiled SharedFunctionInfo for a particular
>    function literal, and the old Script has an uncompiled
>    SharedFunctionInfo, then the old SharedFunctionInfo is updated to
>    point to the function_data and feedback_metadata from the new
>    SharedFunctionInfo.
> 3. If any used object from the new object graph points to a
>    SharedFunctionInfo, where the old object graph contains a matching
>    SharedFunctionInfo for the same function literal, then that pointer
>    is updated to point to the old SharedFunctionInfo.
>
> The document at [0] includes diagrams showing an example merge on a very
> small script.
>
> Steps 1 and 2 above are pretty simple, but step 3 requires walking a
> possibly large set of objects, so this new API lets the embedder run
> step 3 from a background thread. Steps 1 and 2 are performed later, on
> the main thread.
>
> The next important question is: in what ways can the old script's object
> graph be modified during the background execution of step 3, or during
> the time after step 3 but before steps 1 and 2?
>
> A. SharedFunctionInfos can go from compiled to uncompiled due to
>    flushing. This is okay; the worst outcome is that the function would
>    need to be compiled again later. Such a risk is already present,
>    since V8 doesn't keep IsCompiledScopes for every compiled function in
>    a background-deserialized script.
> B. SharedFunctionInfos can go from uncompiled to compiled due to lazy
>    compilation. This is also okay; the merge completion logic on the
>    main thread will just keep this lazily compiled data rather than
>    inserting compiled data from the newly deserialized object graph.
> C. SharedFunctionInfos can be cleared from the Script's weak array if
>    they are no longer referenced. This is mostly okay, because any
>    SharedFunctionInfo that is needed by the background merge is strongly
>    referenced and therefore can't be cleared. The only problem arises if
>    the top-level SharedFunctionInfo gets cleared, so the merge task must
>    deliberately keep a reference to that one.
> D. SharedFunctionInfos can be created if they are needed due to lazy
>    compilation of a parent function. This change is somewhat troublesome
>    because it invalidates the background thread's work and requires a
>    re-traversal on the main thread to update any pointers that should
>    point to this lazily compiled SharedFunctionInfo.
>
> At a high level, this change implements three previously unimplemented
> functions in BackgroundDeserializeTask (in compiler.cc) and updates one:
>
> - BackgroundDeserializeTask::SourceTextAvailable, run on the main
>   thread, checks whether there is a matching Script in the Isolate
>   compilation cache which doesn't already have a top-level
>   SharedFunctionInfo. If so, it saves that Script in a persistent
>   handle.
> - BackgroundDeserializeTask::ShouldMergeWithExistingScript checks
>   whether the persistent handle from the first step exists (a fast
>   operation which can be called from any thread).
> - BackgroundDeserializeTask::MergeWithExistingScript, run on a
>   background thread, performs step 3 of the merge described above and
>   generates lists of persistent data describing how the main thread can
>   complete the merge.
> - BackgroundDeserializeTask::Finish is updated to perform the merge
>   steps 1 and 2 listed above, as well as a possible re-traversal of the
>   graph if required due to newly created SharedFunctionInfos in the old
>   Script.
>
> The merge logic has nothing to do with deserialization, and indeed I
> hope to reuse it for background compilation tasks as well, so it is all
> contained within a new class BackgroundMergeTask (in compiler.h,cc). It
> uses a second class, ForwardPointersVisitor (in compiler.cc) to perform
> the object visitation that updates pointers to SharedFunctionInfos.
>
> [0] https://docs.google.com/document/d/1UksB5Vm7TT1-f3S9W1dK_rP9jKn_ly0WVm_UDPpWuBw/edit
>
> Bug: v8:12808
> Change-Id: Id405869e9d5b106ca7afd9c4b08cb5813e6852c6
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3739232
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#81941}

Bug: v8:12808
Change-Id: I82a080e6287828445293cb6b4b94a5e8f15eb8f3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3787213
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Deepti Gandluri <gdeepti@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81943}
      44fc1fda
    • Frank Tang's avatar
      [Temporal] Add compare, round and total to Duration · f5276225
      Frank Tang authored 
      Also add AOs:
ParseTemporalRelativeToString, DefaultTemporalLargestUnit, CalculateOffsetShift, UnbalanceDurationRelative, BalanceDurationRelative,


Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.duration.compare
https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.round
https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.total
https://tc39.es/proposal-temporal/#sec-temporal-parsetemporalrelativetostring
https://tc39.es/proposal-temporal/#sec-temporal-defaulttemporallargestunit
https://tc39.es/proposal-temporal/#sec-temporal-calculateoffsetshift
https://tc39.es/proposal-temporal/#sec-temporal-unbalancedurationrelative
https://tc39.es/proposal-temporal/#sec-temporal-balancedurationrelative

Bug: v8:11544
Change-Id: I3b20bdb7cec30f6a8503603169643678988f4dcf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3750322
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: 's avatarAdam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81942}
      f5276225
    • Seth Brenith's avatar
      Background merging of deserialized scripts · e895b7af
      Seth Brenith authored 
      Recently, https://crrev.com/c/v8/v8/+/3681880 added new API functions
with which an embedder could request that V8 merge newly deserialized
script data into an existing Script from the Isolate's compilation
cache. This change implements those new functions. This functionality is
still disabled by default due to the flag
merge_background_deserialized_script_with_compilation_cache.

The goal of this new functionality is to reduce memory usage when
multiple frames load the same script with a long delay between (long
enough for the script to have been evicted from Blink's in-memory cache
and for the top-level SharedFunctionInfo to be flushed). In that case,
there are two Script objects for the same script: one which was found in
the Isolate compilation cache (the "old" script), and one which was
recently deserialized (the "new" script). The new script's object graph
is essentially standalone: it may point to internalized strings and
readonly objects such as the empty feedback metadata, but otherwise
it is unconnected to the rest of the heap. The merging logic takes any
useful data from the new script's object graph and attaches it into the
old script's object graph, so that the new Script object and any other
duplicated objects can be discarded. More specifically:

1. If the new Script has a SharedFunctionInfo for a particular function
   literal, and the old Script does not, then the old Script is updated
   to refer to the new SharedFunctionInfo.
2. If the new Script has a compiled SharedFunctionInfo for a particular
   function literal, and the old Script has an uncompiled
   SharedFunctionInfo, then the old SharedFunctionInfo is updated to
   point to the function_data and feedback_metadata from the new
   SharedFunctionInfo.
3. If any used object from the new object graph points to a
   SharedFunctionInfo, where the old object graph contains a matching
   SharedFunctionInfo for the same function literal, then that pointer
   is updated to point to the old SharedFunctionInfo.

The document at [0] includes diagrams showing an example merge on a very
small script.

Steps 1 and 2 above are pretty simple, but step 3 requires walking a
possibly large set of objects, so this new API lets the embedder run
step 3 from a background thread. Steps 1 and 2 are performed later, on
the main thread.

The next important question is: in what ways can the old script's object
graph be modified during the background execution of step 3, or during
the time after step 3 but before steps 1 and 2?

A. SharedFunctionInfos can go from compiled to uncompiled due to
   flushing. This is okay; the worst outcome is that the function would
   need to be compiled again later. Such a risk is already present,
   since V8 doesn't keep IsCompiledScopes for every compiled function in
   a background-deserialized script.
B. SharedFunctionInfos can go from uncompiled to compiled due to lazy
   compilation. This is also okay; the merge completion logic on the
   main thread will just keep this lazily compiled data rather than
   inserting compiled data from the newly deserialized object graph.
C. SharedFunctionInfos can be cleared from the Script's weak array if
   they are no longer referenced. This is mostly okay, because any
   SharedFunctionInfo that is needed by the background merge is strongly
   referenced and therefore can't be cleared. The only problem arises if
   the top-level SharedFunctionInfo gets cleared, so the merge task must
   deliberately keep a reference to that one.
D. SharedFunctionInfos can be created if they are needed due to lazy
   compilation of a parent function. This change is somewhat troublesome
   because it invalidates the background thread's work and requires a
   re-traversal on the main thread to update any pointers that should
   point to this lazily compiled SharedFunctionInfo.

At a high level, this change implements three previously unimplemented
functions in BackgroundDeserializeTask (in compiler.cc) and updates one:

- BackgroundDeserializeTask::SourceTextAvailable, run on the main
  thread, checks whether there is a matching Script in the Isolate
  compilation cache which doesn't already have a top-level
  SharedFunctionInfo. If so, it saves that Script in a persistent
  handle.
- BackgroundDeserializeTask::ShouldMergeWithExistingScript checks
  whether the persistent handle from the first step exists (a fast
  operation which can be called from any thread).
- BackgroundDeserializeTask::MergeWithExistingScript, run on a
  background thread, performs step 3 of the merge described above and
  generates lists of persistent data describing how the main thread can
  complete the merge.
- BackgroundDeserializeTask::Finish is updated to perform the merge
  steps 1 and 2 listed above, as well as a possible re-traversal of the
  graph if required due to newly created SharedFunctionInfos in the old
  Script.

The merge logic has nothing to do with deserialization, and indeed I
hope to reuse it for background compilation tasks as well, so it is all
contained within a new class BackgroundMergeTask (in compiler.h,cc). It
uses a second class, ForwardPointersVisitor (in compiler.cc) to perform
the object visitation that updates pointers to SharedFunctionInfos.

[0] https://docs.google.com/document/d/1UksB5Vm7TT1-f3S9W1dK_rP9jKn_ly0WVm_UDPpWuBw/edit

Bug: v8:12808
Change-Id: Id405869e9d5b106ca7afd9c4b08cb5813e6852c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3739232Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#81941}
      e895b7af
    • Michael Achenbach's avatar
      [test] Skip flaky test · 4af62459
      Michael Achenbach authored 
      No-Try: true
Bug: v8:13107
Change-Id: I18ed93605594c7d2baba6fb744439df0eb4cb3ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785146
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: 's avatarClemens Backes <clemensb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81940}
      4af62459
    • Michael Lippautz's avatar
      cppgc: Move forward Trace(T*) deprecation · 0609bb83
      Michael Lippautz authored 
      Bug: v8:13089
Change-Id: I271addd3a80feaa40520ab2768a2380c3d7ab62f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780821
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: 's avatarAnton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81939}
      0609bb83
    • Tobias Tebbi's avatar
      [builtins] add builtins PGO profiling data for x64 · 3e6ad9f2
      Tobias Tebbi authored 
      Bug: v8:10470
Change-Id: I67e1962c17caecdf7cd9e8ac64ce7e4c0d694a21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3776693Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81938}
      3e6ad9f2
    • jameslahm's avatar
      [test] Move cctest/test-api-wasm to unittests/ · e8f9ff85
      jameslahm authored 
      ... api/api-wasm-unittest.

Bug: v8:12781
Change-Id: I6d6eafcbc67e114fc1fa9b1f1f8dea21ab831ee6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3748165Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#81937}
      e8f9ff85
    • v8-ci-autoroll-builder's avatar
      Update V8 DEPS (trusted-origins) · 7eda3f55
      v8-ci-autoroll-builder authored 
      Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/be25fb2..d580717

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/a4506d5..af18ab7

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/0ca99b7..3d8d88e

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: Idfaaa0c7c941d19b623af4f69db6b67a051f9a1e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785204
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81936}
      7eda3f55
    • Michael Achenbach's avatar
      [test] Temporarily print errors when fetching process list · bc618978
      Michael Achenbach authored 
      Bug: v8:13101
Change-Id: I1fbcfd5758e3fb739b79c7d381e62b380cd14a2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784227Reviewed-by: 's avatarLiviu Rau <liviurau@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81935}
      bc618978
    • Leszek Swirski's avatar
      [maglev] Make jump gap allocation match move emission · 5a716edd
      Leszek Swirski authored 
      Jump gap moves (for phis and register merges) are emitted as a parallel
move (i.e. treated as a single mapping from registers to registers and
emitted in a way that they don't clobber each other). However, the phi
input allocation was updating the register state as if they were
serialised moves (i.e. a list of moves, one after the other, where each
move could clobber another move's input).

Now the jump phi initialisation doesn't update register state.

Bug: v8:7700
Change-Id: Iecf3211d59d9c416a4449aea22fef633717d92d3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784983Reviewed-by: 's avatarToon Verwaest <verwaest@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81934}
      5a716edd
    • Milad Fa's avatar
      PPC [liftoff]: Implement simd extract lane ops · fd9331eb
      Milad Fa authored 
      Change-Id: I7f618657b7cdaeb3870bd1f743c485ac58b17c56
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3782490
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#81933}
      fd9331eb
    • ishell@chromium.org's avatar
      [ext-code-space] Fix StackFrame::ComputeType() broken by recent CL · eded24d7
      ishell@chromium.org authored 
      It's not allowed to call CodeLookupResult::ToCodeT() from the middle
of GC.

Bug: v8:13100, v8:11880
Change-Id: Idd53794a9f881d01dbf0c372fbb698dbd8fecf94
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785009Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81932}
      eded24d7
    • Leon Bettscheider's avatar
      [heap] Refactor methods and nested class of ConcurrentMarkingVisitor · 6925bc09
      Leon Bettscheider authored 
      This CL moves a few methods and nested class SlotSnapshottingVisitor
from ConcurrentMarkingVisitor to ConcurrentMarkingVisitorUtility.

Methods in ConcurrentMarkingVisitorUtility are now static and instead have a Visitor parameter.

This is preparatory work for adding a
YoungGenerationConcurrentMarkingVisitor class, which will be able to
reuse members of ConcurrentMarkingVisitorUtility.

Bug: v8:13012
Change-Id: I503c20e655578031018a2e37dd92c1d61bbe1686
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3779677
Commit-Queue: Leon Bettscheider <bettscheider@google.com>
Reviewed-by: 's avatarOmer Katz <omerkatz@chromium.org>
Reviewed-by: 's avatarDominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81931}
      6925bc09
    • Leszek Swirski's avatar
      Revert "Reland "cppgc: Enable pointer compression by default on Desktop"" · e93a09c2
      Leszek Swirski authored 
      This reverts commit c3f18ae6.

Reason for revert: Speculative revert for https://luci-milo.appspot.com/ui/inv/build-8807661142690641489/test-results?q=conformance%2Fogles%2FGL%2FgreaterThanEqual%2FgreaterThanEqual_001_to_008.html

Original change's description:
> Reland "cppgc: Enable pointer compression by default on Desktop"
>
> - The data race on atomic memcpying/memsetting was fixed;
> - All the known alignment issues in Blink were fixed;
> - Several perf optimizations were applied.
>
> Original change's description:
> > cppgc: Enable pointer compression by default on Desktop
> >
> > The CL enables pointer compression in Oilpan.
> >
> > For sherrifs: the CL may cause some slight perf regressions (likely
> > blink_perf.*), due to slightly higher cost of compression and
> > decomrpession.
> >
> > Speedometer2 is not expected to regress, as was checked locally. Such a
> > slight performance degradation is compensated by memory savings that are
> > expected to be around 10-20% of Oilpan committed size (~2.5-5% of Renderer
> > PMF).
>
> Bug: chromium:1325007
> Change-Id: I5fa9a06cb1fa5141f4e2b22e710007e2404a176b
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3762567
> Auto-Submit: Anton Bikineev <bikineev@chromium.org>
> Commit-Queue: Anton Bikineev <bikineev@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81914}

Bug: chromium:1325007
Change-Id: I15baa011500a2156871277c644a004b9cacfd5f4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3783991
Owners-Override: Leszek Swirski <leszeks@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81930}
      e93a09c2
    • Leszek Swirski's avatar
      Revert "cppgc: Consistently treat sentinel pointer as live" · 69fcc196
      Leszek Swirski authored 
      This reverts commit 60e9b503.

Reason for revert: Speculative revert for https://luci-milo.appspot.com/ui/inv/build-8807661142690641489/test-results?q=conformance%2Fogles%2FGL%2FgreaterThanEqual%2FgreaterThanEqual_001_to_008.html

Original change's description:
> cppgc: Consistently treat sentinel pointer as live
>
> Sentinel pointers would be treated as live by the GC (through
> `HandleWeak()` but would be treated as dead when checked explicitly
> through the `LivenessBroker` in e.g. custom callbacks.
>
> Treat sentinel pointers as live consistently across all callsites
> and weak types.
>
> Change-Id: I9a4c096ddac1a111df808f3683325b55e7597eea
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3782800
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Anton Bikineev <bikineev@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81916}

Change-Id: Ic1ea0655499ae2e4ae7252fda7158d809e4970ca
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3783992
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81929}
      69fcc196
    • jameslahm's avatar
      [test] Move cctest/test-weaksets to unittests/ · 09bf4f27
      jameslahm authored 
      ... objects/weaksets-unittest.

Bug: v8:12781
Change-Id: I355deaff33e4bfe7125af587654cae39f2d719d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784616Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#81928}
      09bf4f27
    • Leszek Swirski's avatar
      [maglev] Emit gap moves for double register merges · fbf53d17
      Leszek Swirski authored 
      We update RegisterMerge information for DoubleRegister, but don't
actually emit the gap moves for them. This required templatifying some
more code on the register type, and exposing a general LoadToRegister
for ValueNode.

Bug: v8:7700
Change-Id: I7122b5c562bab20d8f912936ff150d15b9cc033f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3785003
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: 's avatarVictor Gomes <victorgomes@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81927}
      fbf53d17
    • Leszek Swirski's avatar
      [maglev] Add tracing for graph building · 6dd85ba3
      Leszek Swirski authored 
      Too often, maglev has an issue during graph building. These are hard to
debug, because failing to build a graph means that no graph can be
printed. This patch adds a tracing printer that dumps out nodes as they
are added to the graph -- it doesn't have the beautiful unicode arrows,
but at least it's something.

Bug: v8:7700
Change-Id: Id6673a9ee2436eac365d6d449dd2fa49bdc354d0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780527Reviewed-by: 's avatarVictor Gomes <victorgomes@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81926}
      6dd85ba3
    • Jakob Kummerow's avatar
      [wasm-gc] Non-nullable locals with end-of-block semantics · ce4e9911
      Jakob Kummerow authored 
      a.k.a. "option 1a". Reflects the resolution of this discussion:
https://github.com/WebAssembly/function-references/issues/44

Bug: v8:7748
Change-Id: I6b53c353a1ace2aaf5b852addead51b9f76c9d64
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3782674Reviewed-by: 's avatarManos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81925}
      ce4e9911
    • Samuel Groß's avatar
      [sandbox] Sandboxify JSExternalObject external pointer · efac35f3
      Samuel Groß authored 
      Bug: v8:10391
Change-Id: I6075a8fe3c201f9221149e0c54edf4fb191088da
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/+/3757342
Commit-Queue: Samuel Groß <saelo@chromium.org>
Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81924}
      efac35f3
    • Clemens Backes's avatar
      [API] Prepare deprecation of second OnCriticalMemoryPressure · 588fa294
      Clemens Backes authored 
      The new method is not implemented in Chrome or Node, and the issue has
no activity since 2018, so let's rip out the incomplete new API.

Drive-by: Sprinke a few V8_LIKELY and V8_UNLIKELY.

R=mlippautz@chromium.org

Bug: chromium:634547
Change-Id: I0dabad520d459277d7196fa69c1bbceaf4d53596
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780528Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81923}
      588fa294
    • jameslahm's avatar
      [test] Skip flaky tests in LogMapsTest · e2f66413
      jameslahm authored 
      ... including LogMapsCodeTest.LogMapsDetailsCode, LogMapsTest.LogMapsDetailsStartup
and LogMapsTest.LogMapsDetailsContexts.

Bug: v8:12997
Change-Id: I9dc315d7361efb8c58bf7ad3be8e324cdd456184
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784617Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#81922}
      e2f66413
    • Victor Gomes's avatar
      [maglev] Support Abort bytecode · 98c4c44f
      Victor Gomes authored 
      Bug: v8:7700
Change-Id: Ibd40e7bf3f0681f358bb2ed0785fce9a50f8b617
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784599Reviewed-by: 's avatarJakob Linke <jgruber@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81921}
      98c4c44f