The unittest for {WasmCodeManager} currently disables implicit
allocations for win64 unwind info, but still deals with the implicitly
allocated jump table. With the addition of a far jump table, this logic
would get even more complex.
Thus this CL introduces a testing flag on the {WasmCodeManager} to
disable all implicit allocations, and uses that instead in the
{WasmCodeManagerTest}.
R=mstarzinger@chromium.org
Bug: v8:9477
Change-Id: I45e4bc6b9fec6d7286bf6b45f778681ae0dba746
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725622
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63025}
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 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}
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 allows to return bool values from Torque macros and branch on them
without performance penalty, reconstructing good control flow.
Drive-by cleanup: Delete EnsureDeferredCodeSingleEntryPoint(), since
it's no longer needed. Constructing a graph and then re-inferring
deferred blocks based on branch hints achieves this effect
automatically.
Bug: v8:7793
Change-Id: Idb6802372b407549e4760f290933d5b8f1e9d952
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1681132
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62979}
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}
This CL removes the built-in reference type in favor of a Torque-implemented generic struct, i.e., internal::Reference<T>. It also adds various infrastructure for getting and creating new generic struct instances, as well as matching against them.
R=tebbi@chromium.org
Change-Id: I1e3d6afe355a0603fa9c3ad789c6b8a97d1b3c26
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1718148
Commit-Queue: Georg Schmid <gsps@google.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62939}
Also add tests for it.
Drive-by fix: Use ChangeInt32ToCompressedSmi since we have it
Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:7703
Change-Id: I45f04f8857acfc57b69eb4022a24ba082d28a91f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708480
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62871}
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}
With compressed pointers, `kArchStoreWithBarrier` is a 32-bit store instead of
64-bit, and this means the index has a differerent immediate range.
Bug: v8:7703
Change-Id: If61c8544b0da87ba2779ba2c1a6963b52e3e5d9a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1710674
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62861}
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 makes sure the language mode of the module is correctly propagated
through the WebAssembly module, so that exported functions are allocated
with the correct language mode. It extends the existing {ModuleOrigin}
enum to consist of three values now.
R=clemensh@chromium.org
TEST=mjsunit/regress/wasm/regress-985154
BUG=chromium:985154
Change-Id: Id7b566738b1e710cc5001b894022bcd0f2c01bc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708484
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62826}
This reverts commit bc33f5aeba.
Reason for revert: Still failing (OOM on win32): https://ci.chromium.org/p/v8/builders/ci/V8%20Win32/22210
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}
TBR=ulan@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org,titzer@chromium.org,gdeepti@chromium.org,mlippautz@chromium.org
Change-Id: Iea755df9aaa1e95d284135bd0a6681b1340b6832
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9380, v8:9221
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708487
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62811}
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}
With a write barrier, stores with negative offsets would allocate a temporary
register to hold the offset when the `str` instruction is able to encode it.
For instance, when writing the object map:
```
;; This could be 'str x2, [x5, #-1]'
movn x4, #0x0
str x2, [x5, x4]
and x16, x5, #0xfffffffffffc0000
ldr x16, [x16, #8]
tbnz w16, #2, #+0xba8 ; Jump out-of-line
```
The reason behind this is that the out-of-line code uses an 'add' instruction on
the offset to compute the field address, putting pressure on the instruction
selector to make sure the immediate fits in both 'str' and 'add'.
But, this is not necessary since the macro-assembler is able to turn the 'add'
into a 'sub' or use a temporary register if needed.
Change-Id: I8838e4b81a0c0c1f90aa3d67861a9da1a6dfed06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1708471
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
Cr-Commit-Position: refs/heads/master@{#62803}
When the main thread contributes to an item parallel job and runs
an item parallel task, it currently emits a background GC trace event.
That is confusing and may lead to incorrect accounting of main thread
GC time. This patch fixes it by introducing a 'Runner' parameter
to ItemParalllelJob::Task::RunInParallel and emitting a foreground
GC event if the runner is the main thread.
Bug: v8:9508
Change-Id: I755751bfe9eef427666d5f16fb50aa6093059e80
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1706485
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62798}
This adds a simple counter to Turbofan that's incremented throughout the compilation, hopefully
frequently enough so we can use it to detect divergence and performance bugs.
In addition, we assert that this counter never gets too high. That's the equivalent of a simple
timeout, just more deterministic. The limitations on Turbofan input size should guarantee that
we never exceed this limit. Since we probably do exceed it rarely, this check is only a DCHECK and
intended to detect performance and divergence issues, but not supposed to be performed in release
builds.
In addition, this CL adds UMA stats to observe the real world distribution of the tick measurement.
Bug: v8:9444
Change-Id: I182dac6ecac64715e3f5885ff5c7c17549351cd0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695475
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62754}
This CL adds the support for Base64 VLQ decoding, which is the base of
parsing source map files (Version 3). With this support, the mappings of
C/C++ source code and WASM bytecode could be built in V8 engine. The
newly-added function is called VLQBase64Decode, which accepts two
character to be decoded. Upon its return, the position is updated with
the next start position. The unittest of this support is also added in
this CL.
argument: the Base64-encoded VLQ string and the position of first
Change-Id: If0f32972ecd7488844478a7b93a0f10cc38b6a5d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1657421
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Zhiguo Zhou <zhiguo.zhou@intel.com>
Cr-Commit-Position: refs/heads/master@{#62748}
This reverts commit dcac02ee81.
Reason for revert: TSAN discovered issue with cleaning invalidated slots in sweeper threads and inserting new slots in the main thread.
Original change's description:
> Use list of invalidated objects for old-to-new refs
>
> Instead of inserting "deletion" entries into the store buffer, keep
> a list of invalidated objects to filter out invalid old-to-new slots.
>
> Bug: v8:9454
> Change-Id: Icd21d8cb2159190457f54d0f8b56742ecc820419
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695474
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62744}
TBR=ulan@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
Change-Id: I4278e9100c76657663e0a6a62f5d86bb3a343c0e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9454
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704109
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62746}
Instead of inserting "deletion" entries into the store buffer, keep
a list of invalidated objects to filter out invalid old-to-new slots.
Bug: v8:9454
Change-Id: Icd21d8cb2159190457f54d0f8b56742ecc820419
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695474
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62744}
When --concurrent-inlining is on, run bytecode analysis for all relevant
functions at serialization time, and store the results in the broker.
Change bytecode analysis such that running it for OSR produces information
that subsumes the non-OSR case. This lets us avoid doing and storing two
analyses for the top-level function in case we do OSR and the function
gets inlined into itself.
Bug: v8:7790
Change-Id: I7d5df0b2652e6e5c758c85578e51b4f8d041b0d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1690959
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62711}
Even though this is not spec'ed yet, it's good to have an implementation
so that we can use clusterfuzz on it.
I changed the parameter order (hopefully) everywhere to
(table_dst_index, table_src_index, ...). This corresponds to the
(dst, src, ...) parameter order for the entry indices.
R=binji@chromium.org
Bug: v8:7581 chromium:980475
Change-Id: I2fb36ffd4bb2f2be5b22c8366732295fa6759236
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1698386
Reviewed-by: Ben Smith <binji@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62661}
This is a reland of https://crrev.com/c/v8/v8/+/1692366. The original
change was reverted because it broke some blink tests. This will be
landed after suppressing them:
https://crrev.com/c/chromium/src/+/1695541
Make native errors serializable.
The implementation is mostly straightforward, but there is one
exception: the stack property. Although the property is not specified,
the spec for error cloning asks us to preserve the property if
possible. This implementation serializes the property only when it is
a string, and otherwise ignores it.
Spec: https://github.com/whatwg/html/pull/4665
Intent-to-Ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/f8JngIi8qYs
Bug: chromium:970079, v8:9462
Change-Id: Ibf012754f30237f6b5acf119ef834e73727a230f
Cq-Include-Trybots: luci.v8.try:v8_linux_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695202
Auto-Submit: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62659}
Even though this is not spec'ed yet, it's good to have an implementation
so that we can use clusterfuzz on it.
R=binji@chromium.org
Bug: v8:7581
Change-Id: I323625322e5240dc6ac224dce8a1f1f7f6070758
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695478
Reviewed-by: Ben Smith <binji@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62656}
This reverts commit 8f8ae4f8c3.
Reason for revert: Still failing layout tests: https://ci.chromium.org/p/v8/builders/ci/V8-Blink%20Linux%2064/33036
Original change's description:
> Reland: Serialize native errors
>
> This is a reland of https://crrev.com/c/v8/v8/+/1649257. The original
> change was reverted because it conflicted with a blink-side serialization
> tag.
>
> Make native errors serializable.
>
> The implementation is mostly straightforward, but there is one
> exception: the stack property. Although the property is not specified,
> the spec for error cloning asks us to preserve the property if
> possible. This implementation serializes the property only when it is
> a string, and otherwise ignores it.
>
> Spec: https://github.com/whatwg/html/pull/4665
> Intent-to-Ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/f8JngIi8qYs
>
> Bug: chromium:970079
> Change-Id: Ic1ff07be2c5be415bfb564fa3975bc1a55a06a72
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1692366
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62607}
TBR=jbroman@chromium.org,yhirano@chromium.org,szuend@chromium.org
Change-Id: Ia52b3e3997663fc293e9d217e5a56544b28d050d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:970079
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695462
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62614}
This is a reland of https://crrev.com/c/v8/v8/+/1649257. The original
change was reverted because it conflicted with a blink-side serialization
tag.
Make native errors serializable.
The implementation is mostly straightforward, but there is one
exception: the stack property. Although the property is not specified,
the spec for error cloning asks us to preserve the property if
possible. This implementation serializes the property only when it is
a string, and otherwise ignores it.
Spec: https://github.com/whatwg/html/pull/4665
Intent-to-Ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/f8JngIi8qYs
Bug: chromium:970079
Change-Id: Ic1ff07be2c5be415bfb564fa3975bc1a55a06a72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1692366
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62607}
This reverts commit 85bc4ef6c2.
Reason for revert: The tag 'e' conflicts with a blink serialization tag: kFileIndexTag.
Original change's description:
> Serialize native errors
>
> Make native errors serializable.
>
> The implementation is mostly straightforward, but there is one
> exception: the stack property. Although the property is not specified,
> the spec for error cloning asks us to preserve the property if
> possible. This implementation serializes the property only when it is
> a string, and otherwise ignores it.
>
> Spec: https://github.com/whatwg/html/pull/4665
> Intent-to-Ship: <TBD>
>
> Bug: chromium:970079
> Change-Id: I7f36b8b4fc5dff22d726d849ccfb9748d0888365
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1649257
> Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62584}
TBR=jbroman@chromium.org,yhirano@chromium.org,adamk@chromium.org,domenic@chromium.org,szuend@chromium.org
Change-Id: Ia0cc902eaa1419cdb0cfec377d8a40fa914612c9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:970079
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1692365
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62589}
Make native errors serializable.
The implementation is mostly straightforward, but there is one
exception: the stack property. Although the property is not specified,
the spec for error cloning asks us to preserve the property if
possible. This implementation serializes the property only when it is
a string, and otherwise ignores it.
Spec: https://github.com/whatwg/html/pull/4665
Intent-to-Ship: <TBD>
Bug: chromium:970079
Change-Id: I7f36b8b4fc5dff22d726d849ccfb9748d0888365
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1649257
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62584}
This CL changes non-const reference arguments to either a const
reference, or pass-by-value combined with std::move.
Bug: v8:9429
Change-Id: Iabace132f855462612ac31922fbd8b456d8ae20d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1690827
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Auto-Submit: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62583}
Change-Id: Ia506f4741e6ff9f024199d1b1fa7abb7dafe2b25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1682835
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62581}
This reverts commit 31cd5d83d3.
Reason for revert: It breaks my heart to revert this, but it fails differently on several bots, e.g. https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20debug/26671.
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}
TBR=ulan@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org,titzer@chromium.org,gdeepti@chromium.org,mlippautz@chromium.org
Change-Id: Ib35788ba8c31192d90cbc72df3dbc41030f109de
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9380, v8:9221
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1691034
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62578}
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}
When I implemented these instructions, I copied the naming scheme of
{GetGlobal}. That's not appropriate for the table.get instruction
though, and I decided I suffered enough from that bad name now.
R=clemensh@chromium.org
Bug: v8:7581, v8:9396
Change-Id: Id1796425458f3d06a2da774374f02c49d665d2c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1690835
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62563}
This CL aims to address the regressions that we saw in Octane 2.1,
particularly in the DeltaBlue test.
This CL brings a 5% improvement in said test by doing
CompressedSigned -> Word32 conversion (instead of
CompressedSigned -> TaggedSigned -> Word32).
There seems to be room for optimizations doing more specialized conversions
regarding representation changes.
Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:7703
Change-Id: I24e5b6c06436fdda9fa6a1ac4699dc55c3d67abd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1684075
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62557}
Cpplint usually checks for non-const reference arguments. They are
forbidden in the style guide, and v8 does not explicitly make an
exception here.
This CL re-enables that warning, and fixes all current violations by
adding an explicit "NOLINT(runtime/references)" comment. In follow-up
CLs, we should aim to remove as many of them as possible.
TBR=mlippautz@chromium.org
Bug: v8:9429
Change-Id: If7054d0b366138b731972ed5d4e304b5ac8423bb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687891
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62551}
Got rid of the following circular header dependency chains:
compilation-dependencies <-> js-heap-broker <-> access-info
types <-> js-heap-broker <-> access-info
Extracted former CompilationDependencies::Dependency class into its own header.
Extracted *Ref classes into their own header.
This should enable building on older GCC versions, e.g. 5.4.0.
Bug: v8:9440
Change-Id: Ia345bc227d8f7806d0b8622b706346a7ce6d01ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687415
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62541}
And make --trace-turbo-alloc honor --trace-turbo-filter
This is useful to filter out a specific compile job, e.g.
if mksnapshot is crashing it easily produces 5GB of logs
without filter.
TBR=bmeurer@chromium.org
Change-Id: Ic7dea0a4cef793b517d98ca2ba1f6ea6eeac63ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1521111
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62536}
In native context specialization, reducing a JSResolvePromise
node requires us to know that there are no "then" properties on
the resolution object's maps. This work must be done at serialization
time.
Bug: v8:7790
Change-Id: If905513a028bc3d71379e2a31e86fff1d3383141
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1666988
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62519}
New Revision: 8b7ea912e516a6daa61487c700687a9426e3a396
Update v8 files / build config accordingly.
- There's now a new library in third_party/inspector_protocol,
bindings/bindings.h, which is configured much like encoding/encoding.h.
It doesn't have much stuff in it yet, but will soon get more code
that would otherwise need to go into jinja templates.
It also comes with a new test, only a smoke test thus far.
Change-Id: I9c00a54a840c214b4bb744a3b272e5ce221954fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1678273
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62442}
This is a CL that aims to do a general cleanup of DecompressionElimination
to make it easier for devs to look at it, and to create new test cases.
Combined direct decompression & compression tests since they can be
summarized with a for loop in just one test that tries out
all the combinations.
Also created 'global' accesses to stop repeating them in every test.
Same for compression and decompression ops.
Added EXPECT in test cases that had none.
Added dots after comments.
Variables now use underscore instead of camelCase.
Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:8977, v8:7703, v8:9183
Change-Id: I38a5c6549e0b4ff89c3271ead23b626e8b6b4843
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1628788
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62345}
We have a global test/OWNERS that has "file://COMMON_OWNERS".
This CL removes redundant OWNERS files in test/ subdirectories and
removes redundant entries from OWNERS files we need to keep for
special per-file entries.
R=yangguo@chromium.org, machenbach@chromium.org
CC=jkummerow@chromium.org
Bug: v8:9247
Change-Id: Ic2e8cbe8e379d7d23c86c6164305e65807f28ed3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1674024
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62336}
Calling FindIndexInScript performs a linear search on the script functions and can
take considerable time. With Bytecode flushing we will lose the function_literal_id
and have to call FindIndexInScript if we ever recompile the flushed function. This
can take a significant proportion of the recompilation time and has caused regressions
in rendering times for some web applications (e.g, 395ms in FindIndexInScript for 132ms
spent lazily re-compiling code).
To avoid this, add function_literal_id back into the SFI and remove it from
UnoptimizedCompileInfo. This will slightly regress memory usage (particularly
in cases where many of the SFIs are compiled), however it means we can remove
the FindIndexInScript function and avoid these long-tail regressions when
bytecode is flushed.
BUG=chromium:965833
Change-Id: Ia31e82eb6c871a6d698a518326a8555822a7a1d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1669700
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62319}
v8memory.h does not have V8 specific definitions, and having it in base
makes it clear that every component may include the file. It also
ensures that including it does not create spurious dependencies on
v8_base.
Change-Id: I565f63b25f33a9ada19d7b2ac5990863ab17f4a7
Bug: v8:9183, v8:8855
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1657923
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62309}
For every @noVerifier in base.tq, this change either removes it or
ensures that it has some annotation explaining why it can't be removed.
The @noVerifier usages that can't be removed fall into the following
categories:
1. Classes that don't have their own instance types and therefore have
no meaningful way to do an Is...() check
2. Fields that might not exist
3. Fields that are waiting for MaybeObject support in Torque
Bug: v8:9311
Change-Id: Id452d4151ec07347ae96a9b5f3b26e2ac8065d31
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1659134
Reviewed-by: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#62263}
We previously only optimized cases like
Parent <- Decompression <- Compression <- Child
to
Parent <- Child
This CL also adds the complementary optimization, namely, it reduces
Parent <- Compression <- Decompression <- Child
as above.
Such a cases became apparent after a recent extension of CSA load elimination (see https://chromium-review.googlesource.com/c/v8/v8/+/1660626), breaking a load elimination test case and thus the pointer compression build.
R=jarin@chromium.org, solanes@chromium.org
Change-Id: Ic730d05175f214e7055f94704141744ca44fefe5
Bug: v8:9353
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1664070
Commit-Queue: Georg Schmid <gsps@google.com>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62246}
