In DebugPropertyIterator::iterator() we were assuming that the call to
JSReceiver::GetOwnPropertyDescriptor() would always yield either an
exception or a valid property descriptor. But that's not guaranteed to
be the case (anymore), because JSReceiver::GetOwnPropertyDescriptor()
nowadays can chicken out with `false` for many different reasons.

Coincidentally the callsites to DebugPropertyIterator::iterator() are
already equipped to handle the case where of an empty property
descriptor, which is basically what we get out here. So this CL adjusts
the DebugPropertyIterator to return an empty descriptor in this case.

Fixed: chromium:1291240
Change-Id: I22a9d0cde2b2c6d3966a85478ed0b87fb4c5d232
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3736445Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81458}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/5b369fe..26f8da3

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

Change-Id: Ia7497d20609919082eef79230051053d61c8460d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3737363
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Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/c76626e..322e254

Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220627.3.1..version:8.20220629.1.1

Rolling v8/third_party/googletest/src: https://chromium.googlesource.com/external/github.com/google/googletest/+log/9406a60..af29db7

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

Change-Id: I769c1ece184dd94a752cf17bcf890a11fc70dab4
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Fixed: chromium:1340488
Change-Id: Id3da10dd13256dfc15a6fef4dc412b5d30ccc8cc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735126Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
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port commit b9c4a849

Change-Id: Id2764f7b37b287a76bd9b22e55f4153b9b619bd6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3736554
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
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https://github.com/tc39/proposal-temporal/pull/1917
https://github.com/tc39/proposal-temporal/pull/1953

Bug: v8:11544
Change-Id: I667980e312248ccbaf826d4e3104fb1ddabef890
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3721464
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Cr-Commit-Position: refs/heads/main@{#81453}

Shifting negative integrals is undefined behavior. The CL simply
switches to uint64_t when decompressing, which anyway results in
sign-extension (in standard terms, integral promotion must preserve the
value and the sign of the source operand).

The CL doesn't have any functional changes, the generated code is the
same. It only fixes the ubsan report.

Bug: chromium:1325007
Change-Id: I491a87b84d4e98b0225f76825dac2f9e85f168d1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3736442
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81452}

Bug: v8:11111
Change-Id: I4846910d05bb5d83c964b2279efdb7cf2a4545b1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733028Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81451}

Change-Id: I172f684515e363fc29e299c70fa3d6eac2789818
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735127
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
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This reverts commit b9821eff.

Reason for revert: Tests fail on gc-stress: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20gc%20stress/39147/overview

Original change's description:
> [stringrefs] Implement string.new_wtf16_array
>
> See https://github.com/WebAssembly/stringref/issues/1.
>
> Bug: v8:12868
> Change-Id: Iea3940c48d5f47609ff7d32e366d2f41d2161372
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734808
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Andy Wingo <wingo@igalia.com>
> Cr-Commit-Position: refs/heads/main@{#81448}

Bug: v8:12868
Change-Id: I7abf8817c51057d9b984175ce162364acbb41ac4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735894
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See https://github.com/WebAssembly/stringref/issues/1.

Bug: v8:12868
Change-Id: Iea3940c48d5f47609ff7d32e366d2f41d2161372
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734808Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81448}

GCC doesn't have __attribute__((require_constant_initialization)). Use
it only for clang.

Bug: chromium:1325007
Change-Id: Ide5d428ed107d3244072774c0031c042ed0cee31
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735125Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81447}

NamesProvider class:
This consolidates logic used so far for the debugger interface.
It also adds support for the "extended name section" proposal:
https://github.com/WebAssembly/extended-name-section

StringBuilder class:
Like std::ostringstream, but 4x faster for this use case.

This lays the groundwork for an updated Wasm disassembler.

Bug: v8:12917
Change-Id: I98aa258147834bc0e314ba98c5927b4cd6070b8f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3720714Reviewed-by: Philip Pfaffe <pfaffe@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81446}

We might be racing with code that resets the age to 0, causing CAS to
fail (or us to read an already reset value).

Change-Id: I3ba555d64d48c4e2d2399978427c764c0e6e7128
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735167
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See https://github.com/WebAssembly/stringref/issues/1.

Bug: v8:12868
Change-Id: Ic1c9b55b1ec35c32c79d9b2cb0be243b96fc4453
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734807
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This reverts commit 4cf08c1a.

Reason for revert: broke ubsan.

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: I2e31fc56250dbe6354a7614fa1f9e926260d842b
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3695565
> Commit-Queue: Anton Bikineev <bikineev@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81442}

Bug: chromium:1325007
Change-Id: Iabc31ed683841ba0189dee9028da330dc03d7e09
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735168
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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: I2e31fc56250dbe6354a7614fa1f9e926260d842b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3695565
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81442}

gcc warns against passing a nullptr to a printf '%s' string print, and
the default args of varint consuming functions in the wasm decoder were
providing a null name.

Bug: chromium:1307180
Change-Id: I7a4e7a38119c2568025a597423d391a7c2c573f2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735123
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
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Auto-Submit: Leszek Swirski <leszeks@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81441}

Add parser support for wasm instructions that create stringrefs from GC
arrays, and which encode strings to GC arrays.

Bug: v8:12868
Change-Id: I38446855b7a55366f8107970811aec935defcdb4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732935Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81440}

In this part: indexOf, lastIndexOf

Bug: v8:11111
Change-Id: I51481ccf44ad6c3ebc9216c1b6cc870fda73566e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726209
Commit-Queue: Marja Hölttä <marja@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81439}

The barrier is currently not thread-safe but may be executed via
concurrent Sparkplug compilation. Remove the actual barrier code as
the remembered set is anyways not used yet.

Bug: v8:13018, chromium:1336850, chromium:1333414
Change-Id: I9287516d559cc3b10d170fa0fda36b26ca487a15
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734809
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Cr-Commit-Position: refs/heads/main@{#81438}

Change-Id: Ia09e8c4528e59116be39be12d688f5b99a34c8e7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732938Reviewed-by: Igor Sheludko <ishell@chromium.org>
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Fix some final gcc warnings:

  * Manually roll googletest to get the fix in:
    https://crrev.com/d5ad28dbe14fca51038fb8c7610f11602b98f682
  * Remove some anonymous namespaces in tests because the types in those
    anonymous namespaces ended up being visible in non-anonymous
    classes.
  * Fix a RVO breaking std::move.
  * Change some known-too-short strncpys into memcpys

Bug: chromium:1307180
Change-Id: I0f64512f77655f3740fc297bbb2087e6c039f7f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735122
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
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Make sure that:

  * Temporaries are consistently free-but-blocked,
  * Blocked registers are ignored when processing free registers (where
    appropriate),
  * Fixed phis are processed before arbitrary register allocation,
  * Blocked state is set and cleared correctly
  * Opportunistic register moves on dropping don't block registers

Bug: v8:7700
Change-Id: I2bc8884f70d9e54ce6ee2fb5bb600b028a9502c3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732931
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Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81435}

Bug: chromium:1340335, chromium:1315901
Change-Id: Ic348e8a66df098f64cf1893f83c145ac7bdb1ecb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732939Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
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Bug: chromium:1307180
Change-Id: Ia279086ec3df9d64bd6a0255ebe27d9e583014c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732937Reviewed-by: Michael Achenbach <machenbach@chromium.org>
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Bug: chromium:1307180
Change-Id: I45e01e172c04f5c0aac40cd84605ce52cb335cdc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732934
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Centralise constant visiting into the graph visitor, and adapt graph
printing to print both the labeller node id, and the node numbering node
id.

Bug: v8:7700
Change-Id: I1af8f97e546f7113ac5655522f9206f207a0ae97
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732932Reviewed-by: Toon Verwaest <verwaest@chromium.org>
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Change-Id: Id3586eae6580416216bce2c448e6885aaa1589b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732111
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
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Live bytes were accounted twice. Once when object is marked black and
once explicitly by the marking task. Drop the accounting by the marking
task.

This should also help reduce binary size.

Bug: v8:12612, chromium:1331317
Change-Id: I43e90413309709662b6fcd0dfdec96cac1b5f231
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732930
Commit-Queue: Omer Katz <omerkatz@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81429}

Also add AOs: FormatISOTimeZoneOffsetString, TemporalInstantToString,
GetUnsignedRoundingMode, ApplyUnsignedRoundingMode, RoundTemporalInstant

Also update the RoundNumberToIncrement implementation and a BigInt version.

Fix the test setup in test/mjsunit/temporal/instant-to-json.js since fromEpochSeconds and fromEpochMilliseconds do not take BigInt

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.tojson
https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.tolocalestring
https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.tostring
https://tc39.es/proposal-temporal/#sec-temporal-temporalinstanttostring
https://tc39.es/proposal-temporal/#sec-temporal-formatisotimezoneoffsetstring
https://tc39.es/proposal-temporal/#sec-temporal-getunsignedroundingmode
https://tc39.es/proposal-temporal/#sec-temporal-applyunsignedroundingmode
https://tc39.es/proposal-temporal/#sec-temporal-roundtemporalinstant
https://tc39.es/proposal-temporal/#sec-temporal-roundnumbertoincrement

This does NOT implement the intl version of toLocaleString
specified in (notice the "sup" not "sec" after #) yet.
https://tc39.es/proposal-temporal/#sup-temporal.instant.prototype.tolocalestring

Bug: v8:11544
Change-Id: I807afd5bf550d2a65a4732a8e536056eea79cf8f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3696483
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81428}

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.plaintime.prototype.round

Bug: v8:11544
Change-Id: I564cec6fdc030e3d39a9798c047534228f670dc6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3692428
Commit-Queue: Frank Tang <ftang@chromium.org>
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Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/4e6d71d..5b369fe

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

Change-Id: I7cad4152d9b673ae901483df006118086068d751
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733340
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Rolling v8/buildtools/third_party/libc++abi/trunk: https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxxabi/+log/b5f3d3b..3007992

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/17a97ab..c76626e

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/3c4d401..a83ac93

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

Change-Id: Ib46c67b3afa845c1e77d92a15fcb3c6a15697756
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733339
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Change-Id: I2ef7b64bc20e71898c96d8a5d6d5509065d578c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733336Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
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- Remove dead code.
- Remove `was_activated_`.

Bug: v8:12775
Change-Id: Ie54b24f21a8789dc815ab7a96ce4a074e3644342
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726300Reviewed-by: Omer Katz <omerkatz@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81423}

Before this CL, the caged heap was lazily initialized upon the first
call of HeapBase ctor. CagedHeap keeps a pointer to PageAllocator which
was provided from cppgc::Platform through the HeapBase ctor. This was
not generally safe: the platform is not enforced to be singleton. If it
happens to die first, then CagedHeap will have a stale pointer. The CL
fixes it simply by moving caged-heap initialization to
cppgc::InitializeProcess(), which already requires a constantly living
PageAllocator.

Bug: chromium:1338030
Change-Id: Ifb70a2db233ef36a99c919db09bed9ff9f3708ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732107
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81422}

The class is dead code, and has not been used for years. I tried to
deprecate the class first, but this caused build errors on GCC [1].
That's why this CL just deletes the class. Deleting the class is okay
because this class was part of the original implementation of streaming
compilation. There is only a single embedder who uses streaming
compilation, which is Chrome, and Chrome switched to the new API
already years ago. If there were other embedders that use this class,
then this embedder would already have no working implementation of
streaming compilation for years.

R=adamk@chromium.org

Bug: v8:12926
Change-Id: I3342167245822cf8ee52d9632cba236fb1b0646c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3714236
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81421}

This is a reland of commit c801d529

perfetto::DynamicString was supported in perfetto very recently.
This CL failed earlier because latest perfetto was not rolled in
v8. Relanding it after rolling the latest perfetto in v8 (see
parent CL).

Original change's description:
> Refactor dynamic name to perfetto::DynamicString
>
> Recently perfetto introduced `perfetto::DynamicString` to allow clients
> to wrap dynamic event name strings. So that clients don't have to
> manually set event name inside trace lambda.
>
> With that:
>
> TRACE_EVENT("cat", nullptr, [&](EventContext ctx) {
>   ctx.event().set_name(dynamic_name_str)
> });
>
> is simplified to:
>
> TRACE_EVENT("cat", perfetto::DynamicString{dynamic_name_str});
>
> In this change we are making use of perfetto::DynamicString to pass
> dynamic event name string.
>
> Change-Id: Ic6b501df67409d6faa4d60b59095ad0e79ce585e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3716473
> Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
> Commit-Queue: Mohit Saini <mohitms@google.com>
> Cr-Commit-Position: refs/heads/main@{#81298}

Cq-Include-Trybots: luci.v8.try:v8_linux64_perfetto_dbg_ng
Change-Id: I70103606f397cd420a5dfccba703bee8962f822b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3714946
Commit-Queue: Mohit Saini <mohitms@google.com>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Mohit Saini <mohitms@google.com>
Cr-Commit-Position: refs/heads/main@{#81420}

Only the parent of the continuation itself was updated. Also update the
parent of the suspender

R=ahaas@chromium.org

Bug: v8:12191
Change-Id: I06684548abe70f4bbda48c12e9e8adda84e1ec27
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726293Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81419}