This cl makes IsLockFree return true for 8 bytes on x64 platforms.
The standard is unfortunately a bit vague on what exactly 'lock free' means.
As a result, we err on the side of caution. We can revisit this, but first
we need the specification to nail down exactly what 'lock free' in this
context.
Bug: v8:8100
Change-Id: I0a6099c6cb95a5581f3e71d0267857b88b4a2f0a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1735592
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63099}
This is a reland of 159df2488c
Original change's description:
> [ic] Don't transition to premonomorphic state
>
> We used to use premonomorphic state to delay initializing the ICs.
> This optimization was to avoid the cost of setting up handlers if the
> code executed only once. With lazy feedback allocation we no longer
> need this.
>
> This cl also renames LoadIC_Uninitialized to LoadIC_Nofeedback and
> StoreIC_Uninitialized to StoreIC_Nofeedback since we now miss to
> runtime in the uninitialized state and use the builtin when there
> is no feedback.
>
>
> Change-Id: I1633e61ea74664da51348e362c34c47a017a264a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683525
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63020}
Change-Id: Ica7eb65649615c2f8410d5b815a98b55cb1cfc4d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1731000
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63082}
This reverts commit 5611f70b3d.
Reason for revert: flaky tests: v8:9588, v8:9587
Original change's description:
> "Reland x4 [arraybuffer] Rearchitect backing store ownership"
>
> This is a reland of bc33f5aeba
>
> Contributed by titzer@chromium.org
>
> Original change's description:
> > [arraybuffer] Rearchitect backing store ownership
> >
> > This CL completely rearchitects the ownership of array buffer backing stores,
> > consolidating ownership into a {BackingStore} C++ object that is tracked
> > throughout V8 using unique_ptr and shared_ptr where appropriate.
> >
> > Overall, lifetime management is simpler and more explicit. The numerous
> > ways that array buffers were initialized have been streamlined to one
> > Attach() method on JSArrayBuffer. The array buffer tracker in the
> > GC implementation now manages std::shared_ptr<BackingStore> pointers,
> > and the construction and destruction of the BackingStore object itself
> > handles the underlying page or embedder-allocated memory.
> >
> > The embedder API remains unchanged for now. We use the
> > v8::ArrayBuffer::Contents struct to hide an additional shared_ptr to
> > keep the backing store alive properly, even in the case of aliases
> > from live heap objects. Thus the embedder has a lower chance of making
> > a mistake. Long-term, we should move the embedder to a model where they
> > manage backing stores using shared_ptr to an opaque backing store object.
>
> TBR=yangguo@chromium.org
>
> BUG=v8:9380,v8:9221,chromium:986318
>
> Change-Id: If671a4a9ca0476e8f084efae46e0d2bf99ed99ef
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1731005
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63041}
TBR=ulan@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org,clemensh@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:9380, v8:9221, chromium:986318
Change-Id: Ic7381239f4e90d0c437b7e47a5ac6e8bce60f882
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1736747
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63081}
When a fast path was added for Math.hypot, the algorithm was also
simplified. This simplification turns out to be incorrect in some rare
edge cases. This cl reverts back to the original algorithm and converts it to torque.
Original cl: https://chromium-review.googlesource.com/c/v8/v8/+/1684178
Bug: v8:9546
Change-Id: If4e21504732f46081a8de823f50f499917f1a20c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725200
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63070}
For variable proxies in a function inside an eval scope that point to
a dynamic variable in the eval scope, the current scope resolution will
find this variable only when the function is eagerly compiled, as the
eval scope only exists during top-level eval compilation. This causes
a mismatch between lazy- and eager- compiled functions.
With this patch, we skip these dynamic variables during lookup, so that
the lookup for the variable proxy always finds a kDynamicLocal or
kDynamicGlobal, both when compiled lazily and eagerly. This is a minor
pessimisation of performance (as we know that the lookup has to be
dynamic), but unblocks other improvements which require idempotent
bytecode generation (such as lazy source positions).
Note that the alternative, of simply not tracking dynamic variables on
the eval scope at all, is not viable due to needing this information
during conflict detection.
Bug: v8:8510
Bug: v8:9511
Change-Id: Ifa72ec05e9a97b7be418912340081b9656765fd4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733077
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63051}
This makes sure the "parameters" and "results" properties of the passed
FunctionType object can be arbitrary iterable objects, not just plain
JavaScript arrays.
R=clemensh@chromium.org
TEST=mjsunit/wasm/type-reflection
BUG=v8:7742
Change-Id: Icba18c418e549deba9fff1855be4956813b1a953
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733071
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63049}
It's too slow and flakes on "V8 Linux - full debug"
Change-Id: I2a83a7a2de6a3865d230edb847a658b1b8b23bec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733076
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63047}
This is a reland of f5611402f7
Original change's description:
> [ptr-compr][arm64] Temporarily enable pointer compression on arm64
>
> ... and make sure that the arm64 ptr-compr bots proceed testing V8 without
> pointer compression in order to keep testing the other config.
>
> Commented out the 'extra' variant since it was crashing. Opened a bug
> regarding that: https://bugs.chromium.org/p/v8/issues/detail?id=9568
>
> Similar to x64's https://chromium-review.googlesource.com/c/v8/v8/+/1607654
>
> Bug: v8:7703
> Change-Id: Ifd46b029bab34524f9f536dcdbd1574f2ddcbf37
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724216
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63019}
Cq-Include-Trybots: luci.v8.try:v8_android_arm64_n5x_rel_ng
Bug: v8:7703
Change-Id: I1a82b87bf6db4e6d100aeffc29dae60ba73d8119
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1730998
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63043}
This is a reland of bc33f5aeba
Contributed by titzer@chromium.org
Original change's description:
> [arraybuffer] Rearchitect backing store ownership
>
> This CL completely rearchitects the ownership of array buffer backing stores,
> consolidating ownership into a {BackingStore} C++ object that is tracked
> throughout V8 using unique_ptr and shared_ptr where appropriate.
>
> Overall, lifetime management is simpler and more explicit. The numerous
> ways that array buffers were initialized have been streamlined to one
> Attach() method on JSArrayBuffer. The array buffer tracker in the
> GC implementation now manages std::shared_ptr<BackingStore> pointers,
> and the construction and destruction of the BackingStore object itself
> handles the underlying page or embedder-allocated memory.
>
> The embedder API remains unchanged for now. We use the
> v8::ArrayBuffer::Contents struct to hide an additional shared_ptr to
> keep the backing store alive properly, even in the case of aliases
> from live heap objects. Thus the embedder has a lower chance of making
> a mistake. Long-term, we should move the embedder to a model where they
> manage backing stores using shared_ptr to an opaque backing store object.
TBR=yangguo@chromium.org
BUG=v8:9380,v8:9221,chromium:986318
Change-Id: If671a4a9ca0476e8f084efae46e0d2bf99ed99ef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1731005
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63041}
When the flag is on and some of the functions don't have bytecode,
we should gracefully print "no bytecode" instead of crashing.
Bug: chromium:983267
Change-Id: Id4e3385cd871a2dd5bead38c29a41b38319cc8d3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1731003
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63031}
now that we are shipping this by default, we can remove the flag.
Change-Id: I298691df3eec934a5add1aa2a2748a0f3a884ab6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1726452
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63026}
This reverts commit 159df2488c.
Reason for revert: Breaks large-classes-properties test (https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8906338563361079200/+/steps/Bisect_159df248/0/steps/Retry_-_isolates/0/logs/large-classes-properties/0)
Original change's description:
> [ic] Don't transition to premonomorphic state
>
> We used to use premonomorphic state to delay initializing the ICs.
> This optimization was to avoid the cost of setting up handlers if the
> code executed only once. With lazy feedback allocation we no longer
> need this.
>
> This cl also renames LoadIC_Uninitialized to LoadIC_Nofeedback and
> StoreIC_Uninitialized to StoreIC_Nofeedback since we now miss to
> runtime in the uninitialized state and use the builtin when there
> is no feedback.
>
>
> Change-Id: I1633e61ea74664da51348e362c34c47a017a264a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683525
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63020}
TBR=mythria@chromium.org,verwaest@chromium.org
Change-Id: I4fad4e8b881d4a3f8d12149e1797b217a317eaee
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1730995
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63023}
We used to use premonomorphic state to delay initializing the ICs.
This optimization was to avoid the cost of setting up handlers if the
code executed only once. With lazy feedback allocation we no longer
need this.
This cl also renames LoadIC_Uninitialized to LoadIC_Nofeedback and
StoreIC_Uninitialized to StoreIC_Nofeedback since we now miss to
runtime in the uninitialized state and use the builtin when there
is no feedback.
Change-Id: I1633e61ea74664da51348e362c34c47a017a264a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683525
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63020}
... and make sure that the arm64 ptr-compr bots proceed testing V8 without
pointer compression in order to keep testing the other config.
Commented out the 'extra' variant since it was crashing. Opened a bug
regarding that: https://bugs.chromium.org/p/v8/issues/detail?id=9568
Similar to x64's https://chromium-review.googlesource.com/c/v8/v8/+/1607654
Bug: v8:7703
Change-Id: Ifd46b029bab34524f9f536dcdbd1574f2ddcbf37
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724216
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63019}
This reverts commit df8e617772.
Reason for revert: Multiple flakes in apparently related areas:
https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8906409837768155568/+/steps/Check__flakes_/0/logs/BackingStoreTest.RacyGrowWasmMem.../0
Original change's description:
> "Reland x3 [arraybuffer] Rearchitect backing store ownership"
>
> This is a reland of bc33f5aeba
>
> Original change's description:
> > [arraybuffer] Rearchitect backing store ownership
> >
> > This CL completely rearchitects the ownership of array buffer backing stores,
> > consolidating ownership into a {BackingStore} C++ object that is tracked
> > throughout V8 using unique_ptr and shared_ptr where appropriate.
> >
> > Overall, lifetime management is simpler and more explicit. The numerous
> > ways that array buffers were initialized have been streamlined to one
> > Attach() method on JSArrayBuffer. The array buffer tracker in the
> > GC implementation now manages std::shared_ptr<BackingStore> pointers,
> > and the construction and destruction of the BackingStore object itself
> > handles the underlying page or embedder-allocated memory.
> >
> > The embedder API remains unchanged for now. We use the
> > v8::ArrayBuffer::Contents struct to hide an additional shared_ptr to
> > keep the backing store alive properly, even in the case of aliases
> > from live heap objects. Thus the embedder has a lower chance of making
> > a mistake. Long-term, we should move the embedder to a model where they
> > manage backing stores using shared_ptr to an opaque backing store object.
>
> R=mlippautz@chromium.org
> BUG=v8:9380,v8:9221,chromium:986318
> TBR=ulan@chromium.org
>
> Change-Id: I6c49e2425029b5664ef1c68dab8b5146f4ed0ff2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1719191
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63007}
TBR=mstarzinger@chromium.org,titzer@chromium.org,mlippautz@chromium.org
Change-Id: If0266e5893b1325a332d5986337fa7ece2cb6943
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9380, v8:9221, chromium:986318
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1729549
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63011}
This is a reland of 4b15b984ad
Updates since original: fix an arithmetic overflow bug, remove an invalid
DCHECK, add a unit test that would trigger that DCHECK.
Original change's description:
> [regexp] Better quick checks on loop entry nodes
>
> Like the predecessor change https://crrev.com/c/v8/v8/+/1702125 , this
> change is inspired by attempting to exit earlier from generated RegExp
> code, when no further matches are possible because any match would be
> too long. The motivating example this time is the following expression,
> which tests whether a string of Unicode playing cards has five of the
> same suit in a row:
>
> /([🂡-🂮]{5})|([🂱-🂾]{5})|([🃁-🃎]{5})|([🃑-🃞]{5})/u
>
> A human reading this expression can readily see that any match requires
> at least 10 characters (5 surrogate pairs), but the LoopChoiceNode for
> each repeated option reports its minimum distance to the end of a match
> as zero. This is correct, because the LoopChoiceNode's behavior depends
> on additional state (the loop counter). However, the preceding node, a
> SET_REGISTER action that initializes the loop counter, could confidently
> state that it consumes at least 10 characters. Furthermore, when we try
> to emit a quick check for that action, we could follow only paths from
> the LoopChoiceNode that are possible based on the minimum iteration
> count. This change implements both of those "could"s.
>
> I expect this improvement to apply pretty broadly to expressions that
> use minimum repetition counts and that don't meet the criteria for
> unrolling. In this particular case, I get about 12% improvement on the
> overall UniPoker test, due to reducing the execution time of this
> expression by 85% and the execution time of another similar expression
> that checks for n-of-a-kind by 20%.
>
> Bug: v8:9305
>
> Change-Id: I319e381743967bdf83324be75bae943fbb5dd496
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704941
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62963}
Bug: v8:9305
Change-Id: I992070d383009013881bf778242254c27134b650
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1726674
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#63009}
This is a reland of bc33f5aeba
Original change's description:
> [arraybuffer] Rearchitect backing store ownership
>
> This CL completely rearchitects the ownership of array buffer backing stores,
> consolidating ownership into a {BackingStore} C++ object that is tracked
> throughout V8 using unique_ptr and shared_ptr where appropriate.
>
> Overall, lifetime management is simpler and more explicit. The numerous
> ways that array buffers were initialized have been streamlined to one
> Attach() method on JSArrayBuffer. The array buffer tracker in the
> GC implementation now manages std::shared_ptr<BackingStore> pointers,
> and the construction and destruction of the BackingStore object itself
> handles the underlying page or embedder-allocated memory.
>
> The embedder API remains unchanged for now. We use the
> v8::ArrayBuffer::Contents struct to hide an additional shared_ptr to
> keep the backing store alive properly, even in the case of aliases
> from live heap objects. Thus the embedder has a lower chance of making
> a mistake. Long-term, we should move the embedder to a model where they
> manage backing stores using shared_ptr to an opaque backing store object.
R=mlippautz@chromium.org
BUG=v8:9380,v8:9221,chromium:986318
TBR=ulan@chromium.org
Change-Id: I6c49e2425029b5664ef1c68dab8b5146f4ed0ff2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1719191
Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63007}
The DCHECK related to a time when dictionary mode prototypes were the payload
of complex data driven handlers. Now the additional data is used to hold
entirely different kinds of objects. The DCHECK made no sense anymore. Cleaning
up the names makes this clearer.
Bug: chromium:986187
Change-Id: I7173d7d2824396c04c01acb4ceb74693ee9ce6b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724215
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62993}
This method will be used for a test with multiple code spaces, to
encode large function indexes. The current implementation in
{wasmI32Const} just always uses 5 bytes for encoding the LEB value.
This CL adds a {wasmSignedLeb} function which properly encodes the
value, and adds tests for that.
Drive-by: Clean up the rest of {test-wasm-module-builder.js}.
R=mstarzinger@chromium.org
Bug: v8:9477
Change-Id: Ide2d90eed9d40aa28df680fbb413275346d9c0b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725623
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62990}
This patch adds:
- VariableMode::kPrivateMethod
- VariableMode::kPrivateSetterOnly
- VariableMode::kPrivateGetterOnly
- VariableMode::kPrivateGetterAndSetter
And replace the previous RequiresBrandCheckFlag by inferring
whether the brand check is required from these VariableModes.
It is then possible to check duplicate non-complementary
accessors in the parsers and throw early errors, and allow
complementary accessors to be associated with the same
private name variable.
This patch also adds the following AssignType:
- PRIVATE_METHOD
- PRIVATE_GETTER_ONLY
- PRIVATE_SETTER_ONLY
- PRIVATE_GETTER_AND_SETTER
corresponding to the new VariableModes so that it's possible
to generate specialized code for different type of
private accessor declarations.
Design doc: https://docs.google.com/document/d/10W4begYfs7lmldSqBoQBBt_BKamgT8igqxF9u50RGrI/edit
Bug: v8:8330
Change-Id: I0fb61b1be248630d1eadd74fb16d7d64a421f4c4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695204
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62988}
The tests rely too much on OS state (thread allocation) to be
predictable.
Change-Id: I9a562369a3c72522630a23ee47e3e819b9411c65
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725626
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62987}
Previously, this was run as a microtask and this CL changes it to run
as a separate task as mandated by the current WeakRef spec.
This CL also introduces a FinalizationGroup type to the V8 API
representing the JSFinalizationGroup. This has a `Cleanup`
function that runs the cleanup callback associated with it.
SetHostCleanupFinalizationGroupCallback is added to set
the embedder defined HostCleanupFinalizationGroupCallback.
ClearKeptObject is exposed on the v8::Isolate to reset the strongly
held set of objects.
The general workflow is the following:
(a) When the GC notices that a given finalization group has dirty
cells, it calls HostCleanupFinalizationGroupCallback with the given
finalization group.
(b) As part of HostCleanupFinalizationGroupCallback, the embedder
enqueues a task that at some point later calls
FinalizationGroup::Cleanup.
(c) At some point in the future, FinalizationGroup::Cleanup is called,
which runs the cleanup callback of the finalization group.
This patch also includes d8 changes to use these new APIs. Currently,
d8 cycles through the enqueued finalization groups after a synchronous
turn (and it's microtask checkpoint) and runs the cleanup callbacks.
Change-Id: I06eb4da2c103b2792a9c62bc4b98fd4e5c4892fc
Bug: v8:8179
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1655655
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62984}
This drops possible remaining pattern errors from the access target. This is
necessary since sub patterns with default values (assignment expression) aren't
otherwise identifiable as being property accesses.
Bug: v8:9560
Change-Id: Ie6781c0d161e00790268f7d9db81377d045f93b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725624
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62982}
This reverts commit 4b15b984ad.
Reason for revert: UBSan failure (https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8906578530303352544/+/steps/Check/0/logs/regress-126412/0).
Original change's description:
> [regexp] Better quick checks on loop entry nodes
>
> Like the predecessor change https://crrev.com/c/v8/v8/+/1702125 , this
> change is inspired by attempting to exit earlier from generated RegExp
> code, when no further matches are possible because any match would be
> too long. The motivating example this time is the following expression,
> which tests whether a string of Unicode playing cards has five of the
> same suit in a row:
>
> /([🂡-🂮]{5})|([🂱-🂾]{5})|([🃁-🃎]{5})|([🃑-🃞]{5})/u
>
> A human reading this expression can readily see that any match requires
> at least 10 characters (5 surrogate pairs), but the LoopChoiceNode for
> each repeated option reports its minimum distance to the end of a match
> as zero. This is correct, because the LoopChoiceNode's behavior depends
> on additional state (the loop counter). However, the preceding node, a
> SET_REGISTER action that initializes the loop counter, could confidently
> state that it consumes at least 10 characters. Furthermore, when we try
> to emit a quick check for that action, we could follow only paths from
> the LoopChoiceNode that are possible based on the minimum iteration
> count. This change implements both of those "could"s.
>
> I expect this improvement to apply pretty broadly to expressions that
> use minimum repetition counts and that don't meet the criteria for
> unrolling. In this particular case, I get about 12% improvement on the
> overall UniPoker test, due to reducing the execution time of this
> expression by 85% and the execution time of another similar expression
> that checks for n-of-a-kind by 20%.
>
> Bug: v8:9305
>
> Change-Id: I319e381743967bdf83324be75bae943fbb5dd496
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704941
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62963}
TBR=jgruber@chromium.org,seth.brenith@microsoft.com
Change-Id: Iac085b75e054fdf0d218987cfe449be1f1630545
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9305
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725621
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62977}
This is a reland of a0728e869b
Original change's description:
> [d8] Remove maximum workers limitation
>
> This CL refactors the lifetime management of the v8::Worker C++ object
> and in the process lifts the 100 maximum worker limitation. To do this,
> it uses a Managed<v8::Worker> heap object and attaches the managed to
> the API worker object.
>
> R=mstarzinger@chromium.org
> BUG=v8:9524
>
> Change-Id: I279b7aeb6645a87f9108ee6f572105739721cef4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1715453
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62932}
Bug: v8:9524
Change-Id: I7d903fb12ddb00909a9429455f46c55db2fd02de
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1722562
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62974}
Serialize for all cases of JSNativeContextSpecialization::ReduceJSInstanceOf.
Bug: v8:7790
Change-Id: I147991353b86619808257a92961b7051105511f1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1722558
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62965}
Like the predecessor change https://crrev.com/c/v8/v8/+/1702125 , this
change is inspired by attempting to exit earlier from generated RegExp
code, when no further matches are possible because any match would be
too long. The motivating example this time is the following expression,
which tests whether a string of Unicode playing cards has five of the
same suit in a row:
/([🂡-🂮]{5})|([🂱-🂾]{5})|([🃁-🃎]{5})|([🃑-🃞]{5})/u
A human reading this expression can readily see that any match requires
at least 10 characters (5 surrogate pairs), but the LoopChoiceNode for
each repeated option reports its minimum distance to the end of a match
as zero. This is correct, because the LoopChoiceNode's behavior depends
on additional state (the loop counter). However, the preceding node, a
SET_REGISTER action that initializes the loop counter, could confidently
state that it consumes at least 10 characters. Furthermore, when we try
to emit a quick check for that action, we could follow only paths from
the LoopChoiceNode that are possible based on the minimum iteration
count. This change implements both of those "could"s.
I expect this improvement to apply pretty broadly to expressions that
use minimum repetition counts and that don't meet the criteria for
unrolling. In this particular case, I get about 12% improvement on the
overall UniPoker test, due to reducing the execution time of this
expression by 85% and the execution time of another similar expression
that checks for n-of-a-kind by 20%.
Bug: v8:9305
Change-Id: I319e381743967bdf83324be75bae943fbb5dd496
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704941
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62963}
Fixes a bytecode mismatch for arrow functions with default arguments
between eager and lazy compilation. In the former case, parameters with
default values are marked as assigned even if the value never changes
within the function because the parser does not know it's an
arrow-function at the point it sees the assignment.
So this changes ArrowHeadParsingScope::ValidateAndCreateScope to clear
the is_assigned flag on its parameter VariableProxies before it binds
them.
Bug: chromium:988304, v8:8510
Change-Id: I68bf205c73471386181e5fdcec6c8c3b2e527c8f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724384
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62962}
This makes function objects constructed via the {WebAssembly.Function}
constructor callable directly from JavaScript (not just from within
WebAssembly modules). Semantics are as if the function performed the
transition JS-to-Wasm and then Wasm-to-JS in sequence.
R=clemensh@chromium.org
TEST=mjsunit/wasm/type-reflection
BUG=v8:7742
Change-Id: Ic7dcf36ccfda1b473f2541e49419f4d2ee38bc2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1720809
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62953}
This reverts commit a0728e869b.
Reason for revert: Times out on Windows & debug builds - https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20nosnap%20-%20shared/34484
Original change's description:
> [d8] Remove maximum workers limitation
>
> This CL refactors the lifetime management of the v8::Worker C++ object
> and in the process lifts the 100 maximum worker limitation. To do this,
> it uses a Managed<v8::Worker> heap object and attaches the managed to
> the API worker object.
>
> R=mstarzinger@chromium.org
> BUG=v8:9524
>
> Change-Id: I279b7aeb6645a87f9108ee6f572105739721cef4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1715453
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62932}
TBR=mstarzinger@chromium.org,titzer@chromium.org,clemensh@chromium.org
Change-Id: I3a27937cba13b5413390f49268a107c184515153
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9524
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1720590
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62937}
Use the position of commas in arrow expressions to mark the initializer
position of any parameters that might have been set in the preceding
parameter.
To enable this, this makes variable_list_ in ExpressionParsingScope a
ScopedList<pair<VariableProxy*, int>> and changes ScopedList::at to
return references so its elements can be modified in place.
This fixes a source of bytecode mismatches when collecting source
positions lazily and is a second attempt at fixing this after
https://chromium-review.googlesource.com/c/v8/v8/+/1683267 introduced
problems due to destructuring.
Bug: chromium:980422, chromium:981701, v8:8510
Change-Id: I948f89f34fb75d7463a13183e363f7f96ad09d13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1710671
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62936}
This is short-term fix for flaky failures on GC fuzzer. The closures
g1 and g2 have the same SFI and pending optimzed table treats them as
a single entry. This cl, adds %PrepareFunctionForOptimize after one of
them is optimized.
Bug: v8:9556
Change-Id: I1fd72da1baa5de2f7650e080f9b6d04b69dd6a16
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1719188
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62934}
This CL refactors the lifetime management of the v8::Worker C++ object
and in the process lifts the 100 maximum worker limitation. To do this,
it uses a Managed<v8::Worker> heap object and attaches the managed to
the API worker object.
R=mstarzinger@chromium.org
BUG=v8:9524
Change-Id: I279b7aeb6645a87f9108ee6f572105739721cef4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1715453
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62932}
- Move SerializePrototype out of DependOnStablePrototypes into
ComputePropertyAccessInfo.
- Brokerize JSNativeContextSpecialization::InferHasInPrototypeChain.
- Brokerize JSNativeContextSpecialization::ReduceJSOrdinaryHasInstance
(modulo the call to ReduceJSInstanceOf).
- Brokerize JSNativeContextSpecialization::ReduceJSHasInPrototypeChain.
- Serialize for JSCallReducer::ReduceObjectPrototypeIsPrototypeOf.
- Serialize for JSNativeContextSpecialization::ReduceJSInstanceOf. This
is still incomplete.
Bug: v8:7790
Change-Id: Ic56eab5ddd8d725a13d2980e5b55db53ae82e822
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1709408
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62920}
Preparing the value for storing into a typed array is user visible
operation in some cases (for ex: calling ToNumber). To avoid doing this
conversion twice pass the converted to the runtime when bailing out
from the handlers.
Bug: chromium:981236
Change-Id: I3de23d317d22cd6c201fe8a4db30014f4cf76251
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1692932
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62879}
This reverts commit 26dad80ff5.
Reason for revert: Breaks d8, see https://ci.chromium.org/p/v8/builders/ci/V8%20Win32/22272
Original change's description:
> [d8] Cleanup message queues
>
> Simplifies some of the logic of message queues in d8 and makes sure
> to delete any in-flight messages upon worker termination. Drive-by
> cleanups of some other small d8 vestiges.
>
> R=clemensh@chromium.org
> BUG=v8:9524
>
> Change-Id: I587c0cb3eeed88107e7dba552389057f07c15c43
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1710673
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62873}
TBR=titzer@chromium.org,clemensh@chromium.org
Change-Id: Ibc15d9fb76698a2bad51e3842392634fb2f0246b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9524
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1714877
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62875}
Simplifies some of the logic of message queues in d8 and makes sure
to delete any in-flight messages upon worker termination. Drive-by
cleanups of some other small d8 vestiges.
R=clemensh@chromium.org
BUG=v8:9524
Change-Id: I587c0cb3eeed88107e7dba552389057f07c15c43
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1710673
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62873}
This reverts commit 306cf40344.
Reason for revert: performance regressions / too near branch point
TBR=mslekova@chromium.org
BUG=v8:9380
Change-Id: If77630b73eafbf1190c823199fe2a34361da303f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1714867
Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62867}
A benign datarace can occur between the array buffer tracker and
using an arraybuffer as an asm.js memory. The former reads the
{is_shared} bit, which should never change, and the latter writes
the {is_asmjs_memory} bit, but no other bits. Since these bits are
packed into a single word, TSAN reports a race.
R=ulan@chromium.org
BUG=v8:9531
Change-Id: Icceff211368e13794b6678b5fd7748fb5b3235bf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1714647
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62866}
Reland after splitting large classes further.
es6/classes.js is large and causes timeouts and OOM on some of the
configurations.
Bug: v8:9246
Change-Id: I51952447eb6a6b46d78410d5d3798292f5a8d87d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1706061
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62864}
Previously, if the new length was less than the current length, we ignored
the "configurable" value and set the length as requested. We already threw
if the new length was greater than or equal to the current length.
New behavior matches the spec and other implementations.
Bug: v8:9460
Change-Id: Idb92fd121bdaa707f6abd2d2082628bbf3541b83
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1709336
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62855}
This is a reland of bc33f5aeba
Original change's description:
> Reland "[arraybuffer] Rearchitect backing store ownership"
>
> This is a reland of 31cd5d83d3
>
> Original change's description:
> > [arraybuffer] Rearchitect backing store ownership
> >
> > This CL completely rearchitects the ownership of array buffer backing stores,
> > consolidating ownership into a {BackingStore} C++ object that is tracked
> > throughout V8 using unique_ptr and shared_ptr where appropriate.
> >
> > Overall, lifetime management is simpler and more explicit. The numerous
> > ways that array buffers were initialized have been streamlined to one
> > Attach() method on JSArrayBuffer. The array buffer tracker in the
> > GC implementation now manages std::shared_ptr<BackingStore> pointers,
> > and the construction and destruction of the BackingStore object itself
> > handles the underlying page or embedder-allocated memory.
> >
> > The embedder API remains unchanged for now. We use the
> > v8::ArrayBuffer::Contents struct to hide an additional shared_ptr to
> > keep the backing store alive properly, even in the case of aliases
> > from live heap objects. Thus the embedder has a lower chance of making
> > a mistake. Long-term, we should move the embedder to a model where they
> > manage backing stores using shared_ptr to an opaque backing store object.
> >
> > R=mlippautz@chromium.org
> > BUG=v8:9380,v8:9221
> >
> > Change-Id: I48fae5ac85dcf6172a83f252439e77e7c1a16ccd
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1584323
> > Commit-Queue: Ben Titzer <titzer@chromium.org>
> > Reviewed-by: Ben Titzer <titzer@chromium.org>
> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> > Reviewed-by: Yang Guo <yangguo@chromium.org>
> > Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#62572}
>
> Bug: v8:9380, v8:9221
> Change-Id: If3f72967a8ebeb067c0edcfc16ed631e36829dbc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1691906
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62809}
Bug: v8:9380, v8:9221
Change-Id: I9a2525753ae2424108d074fa81df5f25d945c824
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1709409
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62847}
This is a reland of e55e0aa5bd
Original change's description:
> [runtime] Fix protector invalidation
>
> Protectors trigger when special properties are modified or masked. Previously
> we would check whether the property stored on the holder would invalidate the
> protector. Stores to to the receiver rather than the holder, however, so this
> CL changes holder for receiver, and adds additional checks that were missing.
>
> Bug: v8:9466
> Change-Id: I81bc3d73f91381da0d254e9eb79365ae2d25d998
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708468
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62805}
Tbr: leszeks@chromium.org
Bug: v8:9466
Change-Id: I693c73577ca9a35a271f509770cc1c87e5cc4b73
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1709420
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62829}
