Flag -Wno-defaulted-function-deleted is not known to clang 4.0, which is
currently the default on many systems, so filter the flag for now.

R=mslekova@chromium.org

Notry: true
Change-Id: I9ee9cbbf97f411d409b8b4150897d7741abe24af
Reviewed-on: https://chromium-review.googlesource.com/c/1301511
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57033}

BUG= v8:8372

Change-Id: Ic29847674a1e455a405c4599c01785ee7aefcedc
Reviewed-on: https://chromium-review.googlesource.com/c/1301500
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57032}

TBR=santa

Change-Id: Iff32a0c25b083003a0dc6caa53ed5bb182f4de2d
Reviewed-on: https://chromium-review.googlesource.com/c/1301508Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57031}

NOTRY=true
TBR=sergiyb@chromium.org

Change-Id: I7f87b58242fa2e29166c11aacc235ef9c279b3e8
Reviewed-on: https://chromium-review.googlesource.com/c/1301478Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57030}

Fix some JS smells as suggested in
https://github.com/WebAssembly/spec/issues/897.

R=ahaas@chromium.org

Bug: v8:8238
Change-Id: Idc4f738da849f28477563df628dcae2805b1b47e
Reviewed-on: https://chromium-review.googlesource.com/c/1301476Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57029}

This CL refactors the existing trap handler code for Linux to allow a
cleaner extension to Windows.

1) The CL extracts platform-specific code into separate files, see
https://docs.google.com/document/d/1HCgKIpdjy_CEodTLvZ5VuykDI6gGTHrTtau2j0zwm28.
Specifically this means:
* Move posix-specific API functions from v8.h to v8-wasm-trap-handler-posix.h.
  Deprecate the existing TryHandleSignal API function.
* Move posix-specific function declarations from trap-handler-internal.h to
  handler-inside-posix.h
* Move posix-specific function definitions from handler-shared.cc to
  handler-outside-posix.cc

2) The CL changes filenames from *-linux.* to *-posix.*. I expect that
most of the implementation for MacOS will be the same as for Linux.

Bug: v8:6743
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I4bb7f199564a2f01042084d15a82311d11a93c7b
Reviewed-on: https://chromium-review.googlesource.com/c/1280324
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57028}

Fix: Guard with lock when accessing background counters.

This reverts commit d5f3e225.

CQ_INCLUDE_TRYBOTS=luci.v8.try:v8_linux64_tsan_rel

Change-Id: I4e00f41ce6a2fac86d4e90c70e57c7a333442a97
Reviewed-on: https://chromium-review.googlesource.com/c/1301503Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57027}

TBR=yangguo@chromium.org
NOTRY=true

Bug: chromium:898606
Change-Id: Ibbb11d3766c95a15c6262c741cd65d694de4489c
Reviewed-on: https://chromium-review.googlesource.com/c/1301506
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57026}

The valid store types of a {Float64Array} heap view are specified to be
"float?" and "double?". We correctly accepted both types but forgot to
emit the appropriate conversion in the "float?" case. This just adds the
missing conversion expression.

R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-898974
BUG=chromium:898974,v8:8347

Change-Id: I306b10e2088185b1522da29b1a113908ef9925f2
Reviewed-on: https://chromium-review.googlesource.com/c/1301499
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57025}

GCs should only trigger only trigger when growing external memory but
not when removing it.

- The limit is already lowered when removing memory, so possible future
  allocations check against a lowered limit.
- Memory pressure signals are already handled via an explicit V8 API.

Bug: chromium:899035
Change-Id: I96da5862400e06edb8c9fa47357070b3b48560a1
Reviewed-on: https://chromium-review.googlesource.com/c/1301473Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57024}

This adds support for Promise.all() to --async-stack-traces (also at
zero cost, since we can derive the relevant information from the resolve
element closure and context). In case of `Promise.all(a)` the stack
trace even tells you which element of `a` is responsible, for example

```js
async function fine() {}
async function thrower() { await fine(); throw new Error(); }
async function test() { await Promise.all([fine(), thrower()]); }
```

will generate the following stack trace

```
Error
    at thrower (something.js:1:9)
    at async Promise.all (index 1)
    at async test (something.js:3:3)
```

so it not only shows the async Promise.all() frames, but even tells the
user exactly that the second element of `[fine(), thrower()]` is the
relevant one.

Bug: v8:7522
Change-Id: I279a845888e06053cf0e3c9338ab71caabaabf45
Reviewed-on: https://chromium-review.googlesource.com/c/1299248Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57023}

Currently, because the source float_64_array has an iterator, it hits
the code in the "check_iterator" section of TypedArrayFrom which calls
IterableToList. This builds a temporary PACKED_ELEMENTS array (and boxes
all of the numeric values as HeapNumbers), then uses this as the source
array.

This patch checks if the source array is a TypedArray, and if the iterator
is the built-in one (where we know the iterator's behaviour). If both are
true then it bypasses the creation of this temporary array and uses the
original TypedArray as the source.

This allows it to take advantage of the existing fast code for copying one
typed array to another.

R=hablich@chromium.org, petermarshall@chromium.org

Bug: chromium:884671
Change-Id: I19a944c9d6d5d07699c7dc3ad7196fc871200b62
Reviewed-on: https://chromium-review.googlesource.com/c/1297312Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57022}

We can use GcSafeFindCodeForInnerPointer() when handling a code
added event. This method understands embedded builtins.

Change-Id: I94757f96b7b4ad10cbf7cb5f715d3368cc86b798
Reviewed-on: https://chromium-review.googlesource.com/c/1297953Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57021}

Bug: chromium:898469
Change-Id: I988a71ed92e1c466224235d32bc4e281dd4818cd
Reviewed-on: https://chromium-review.googlesource.com/c/1301494Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57020}

This test was incidentally fixed by
https://chromium-review.googlesource.com/c/v8/v8/+/1280436.

Calls to StartTickSample() and FinishTickSample() are not permitted by
multiple producers. If the signal handler interrupts the main thread,
both might receive the same pointer into the circular buffer and one
will overwrite the data of the other.

This means we cannot call it in tests, and have to use AddSample()
instead.

Bug: v8:8209

Change-Id: I6904204e88077f704f819b52cde0fdaab0f13462
Reviewed-on: https://chromium-review.googlesource.com/c/1299022Reviewed-by: Alexei Filippov <alph@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57019}

This CL restores consistency with other platforms. ebx is now the
kRootRegister on ia32, and thus not an allocatable register any more.

The PreserveRootIA32 register configuration can be removed since it is
now identical to the Default configuration.

Bug: v8:6666
Change-Id: If4e2b4c52aa8b5db40bcd3b4469004b29c0e3d99
Reviewed-on: https://chromium-review.googlesource.com/c/1299078
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57018}

This skips big-object-literal on bots with dchecks (setting DEBUG) and with
stress mode in general.

NOTRY=true

Bug: v8:8328
Change-Id: I53480d1ee942d2c83e46c8804bd8920a5e36cad2
Reviewed-on: https://chromium-review.googlesource.com/c/1301495Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57017}

When creating a Code object, if it has valid builtin_index then create
its RelocInfo in RO_SPACE. For embedded builds this moves about 48 bytes
into RO_SPACE, but it's considerably more for nosnap builds.

Bug: v8:7464
Change-Id: I598cb960c0068ef4be8d72ae8f5c8d74c0195aca
Reviewed-on: https://chromium-review.googlesource.com/c/1299073Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57016}

Move fixing up Filler objects after deserialization from the
StartupDeserializer to the ReadOnlyDeserializer since that's what
deserializes the Filler maps.

Since only RO_SPACE can contain such objects, skip iterating over all
the spaces and just fix them up directly in RO_SPACE. To this end, the
PagedSpace code is moved to ReadOnlySpace and the Heap fix up method is
removed.

Change-Id: I7a01f1ef298e6d5e74d3173620fb7764c3b598f2
Reviewed-on: https://chromium-review.googlesource.com/c/1299013Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57015}

Bug: chromium:898936
Change-Id: I2c8d8212fa97436e32628d4030d36ce457346c1f
Reviewed-on: https://chromium-review.googlesource.com/c/1300133Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57014}

Checking impl()->IsAsync(identifier) is insufficient since it could be
parenthesized. By checking the token in addition to IsIdentifier guarantees
that we've only seen the single token ASYNC.

Bug: chromium:898812
Change-Id: Id94dd607381050b4bd8cd6d8672a5d11256db7da
Reviewed-on: https://chromium-review.googlesource.com/c/1300134Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57013}

NOTRY=true

Change-Id: Ia081262a6daf3b819ec919443de5b3ae2483a5a9
Reviewed-on: https://chromium-review.googlesource.com/c/1301373
Commit-Queue: Florian Sattler <sattlerf@google.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57012}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/5a371bc..df2e6ae

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/b0e7838..c90bc96

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/ed6fe0f..687f318

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: I7e0d61113455231c6fb40e229329b61c3de9b28c
Reviewed-on: https://chromium-review.googlesource.com/c/1300856Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#57011}

This CL applies the equivalent of the Object -> ObjectPtr
transformation to MaybeObject and HeapObjectReference. We
need no renaming in this case because we can just migrate
them both in one go.

Bug: v8:3770
Change-Id: Ie1259c3e8c556eff00f8bcf534d7270ca9fe00e1
Reviewed-on: https://chromium-review.googlesource.com/c/1298386
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57010}

Port e893eb14

Original Commit Message:

    This adds support for having reference type values (i.e. anyref) stored
    in an exception. It is the natural combination of the reference type
    proposal and the exception handling proposal.

    Note that this also introduces support for having write barriers in
    generated WasmCode, as this is the first time we are storing references
    within generated code. Such write barriers will be needed for other uses
    of reference types (e.g. mutable global) regardless.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:8341
LOG=N

Change-Id: I6837a31791654ebe4171f6ecb563939beb3a66dd
Reviewed-on: https://chromium-review.googlesource.com/c/1299899Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#57009}

Change-Id: I87d17d087f47eb60efbd2ddaf04d5d574c73164c
Reviewed-on: https://chromium-review.googlesource.com/c/1299245Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57008}

This reverts commit 9cde8808.

Reason for revert:
https://ci.chromium.org/p/v8/builders/luci.v8.ci/Linux%20V8%20FYI%20Release%20(NVIDIA)/3086

Original change's description:
> [Compile] Ensure we don't access the native context during bytecode finalization.
> 
> Resets the isolate's context to nullptr in debug builds during bytecode finalization
> to ensure that we don't rely on the native context during context independent
> unoptimized compilation.
> 
> BUG=chromium:898076, v8:8041
> 
> Change-Id: Ifaa5006a7a3d31d7fbd535ebb63f8889c75526c4
> Reviewed-on: https://chromium-review.googlesource.com/c/1297961
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56979}

TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org

Change-Id: I363bc9db3f4b89e46ecdaf41c101f7fc1145a325
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:898076, v8:8041
Reviewed-on: https://chromium-review.googlesource.com/c/1299247Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57007}

This reverts commit e05913ff.

Reason for revert:
https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux64%20TSAN/23203

Original change's description:
> [heap] Add marking summary counter
> 
> Change-Id: I41e5c4a99331ddc844cd1fe86f63406a28eebdbf
> Reviewed-on: https://chromium-review.googlesource.com/c/1299243
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#57005}

TBR=ulan@chromium.org,mlippautz@chromium.org

Change-Id: I0acfee50159527f496f752015b19e56eaf1c1600
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/1299246Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57006}

Change-Id: I41e5c4a99331ddc844cd1fe86f63406a28eebdbf
Reviewed-on: https://chromium-review.googlesource.com/c/1299243Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57005}

Bug: v8:8363, v8:7926
Change-Id: I6b08006397a70c2a9c35807a39c6d7e1ebf185e0
Reviewed-on: https://chromium-review.googlesource.com/c/1299025
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57004}

In a DCHECK inside SetPayload(), MSVC gives a C4806 warning. Use the
right types to avoid this.

Also add pointer-with-payload.h to BUILD.gn.

Change-Id: I10a415250e7d2f06dab7a10bff48eef5890bb723
Reviewed-on: https://chromium-review.googlesource.com/c/1297991
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57003}

Bug: v8:8363, v8:7926
Change-Id: Ia231f3eef158643c9ebe29f0854b37610f962acb
Reviewed-on: https://chromium-review.googlesource.com/c/1299242
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57002}

A node short-cutting optimization was not updating uses correctly. This
fix makes sure that there are no other users of the node, thus making the
use update unnecessary.

This fix might have negative performance implications.

Change-Id: Ie9bd23caf4434eb2137e111dc5e7c143fd97521c
Reviewed-on: https://chromium-review.googlesource.com/c/1299019
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57001}

This also disables the test on tsan bots and on bots that have
dchecks always enabled, which includes try bots.

Bug: v8:8332, v8:8831
Change-Id: Ib52cd32985d50e89ddfdc525f08f60ddfd981f1e
Reviewed-on: https://chromium-review.googlesource.com/c/1297319Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57000}

Bug: v8:8363, v8:7926
Change-Id: I0722a30dc201b04f212d49dc96b8e4353a0201ad
Reviewed-on: https://chromium-review.googlesource.com/c/1299024Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56999}

The "max_len" argument for fuzzer targets is deprecated. We need to
enforce the limit internally.

R=ahaas@chromium.org

Bug: chromium:894939
Change-Id: I2206bc63d5e39f1aa189e11042a6a0bbcca31b0d
Reviewed-on: https://chromium-review.googlesource.com/c/1299020Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56998}

- Moves call to DeserializeNativeModule into SaveContext to avoid
  a crash in IsWasmCodegenAllowed.

Bug: chromium:719172
Change-Id: Idd367824a325fc684f29e335b0c07e515f9fdad3
Reviewed-on: https://chromium-review.googlesource.com/c/1298375
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56997}

This uses the PIMPL idiom to hide the implementation of
{CompilationState} while still allowing to call methods on
{CompilationState} using the externally visible type.
It also allows to pass the {CompilationState} in a unique_ptr
without a custom deleter.

R=ahaas@chromium.org, mstarzinger@chromium.org

Bug: v8:8238
Change-Id: I5e842723270bc6bb36b605253e3e88103caec61a
Reviewed-on: https://chromium-review.googlesource.com/c/1297956
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56996}

This adds support for having reference type values (i.e. anyref) stored
in an exception. It is the natural combination of the reference type
proposal and the exception handling proposal.

Note that this also introduces support for having write barriers in
generated WasmCode, as this is the first time we are storing references
within generated code. Such write barriers will be needed for other uses
of reference types (e.g. mutable global) regardless.

R=clemensh@chromium.org
TEST=mjsunit/wasm/exceptions-anyref
BUG=v8:8341

Change-Id: I1211d4a850954622cb873eede0b4024fecc3dd8b
Reviewed-on: https://chromium-review.googlesource.com/c/1296484
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56995}

Bug: v8:8363, v8:7926
Change-Id: Ia1662720a9a6f9b688dd097718597b44425bb134
Reviewed-on: https://chromium-review.googlesource.com/c/1299017
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56994}