Background tasks are not throttled any more, so there is no need to
restart background compile after finishing units. Background tasks will
only stop if all compilation units have been processed.

R=ahaas@chromium.org

Change-Id: I2b28c079bf5847cd5eb4f65629b9aed89afa8d1e
Reviewed-on: https://chromium-review.googlesource.com/c/1296477Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56909}

Change-Id: I8ba59546ab93c7af98bc5ece2f0160628844dd92
Reviewed-on: https://chromium-review.googlesource.com/c/1280584Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56908}

- Fixes and simplify allocating the temporary fixed array for ToString-ed elements.
  - When the array size is greater than representable by an intptr, it overflowed into a negative value causing a non-negative assert to fail.
  - Simplify fallback behavior by always allocating a conservatively sized temporary fixed array. Previously, if the array had dictionary elements, the temporary fixed array was sized based on %GetNumberDictionaryNumberOfElements() and then resized when entering the fallback.

- Fixes related invalid string length handling. When the running total of the resulting string length overflowed or exceeded String::kMaxLength, a RangeError is thrown. Previously, this thrown RangeError bypassed JoinStackPop and left the receiver on the stack.

Bug: chromium:897404
Change-Id: I157b71ef04ab06125a5b1c3454e5ed3713bdb591
Reviewed-on: https://chromium-review.googlesource.com/c/1293070
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56907}

R=mstarzinger@chromium.org

Bug: v8:8238
Change-Id: I93c9d2a643731766f15f4db1bf7647a85488a6d0
Reviewed-on: https://chromium-review.googlesource.com/c/1296454Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56906}

Bug: chromium:897815, chromium:897935, chromium:897766
Change-Id: Ie8c4105867f84054559a4c43c23be82365502c1e
Reviewed-on: https://chromium-review.googlesource.com/c/1296469Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56905}

R=ulan@chromium.org

Change-Id: I73f6fc0baee8e1219a88d4d8f594bba16e64f332
Reviewed-on: https://chromium-review.googlesource.com/c/1296480Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56904}

Whenever left-trimming is possible (e.g. whenever user code is
called), we must not store a reference to an exposed JSArray's
elements.

Bug: chromium:897366,v8:7382
Change-Id: I8dd6a93aa6ed19e755ccce7122e0e019dc578a31
Reviewed-on: https://chromium-review.googlesource.com/c/1292066Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56903}

This introduces a new bit on the Isolate which tells whether promise
hooks, async event delegate or the debug delegate are enabled. Use
this new bit in places where we generally need to take the slow path
due to async instrumentation.

Bug: v8:7253, v8:7522, v8:8238
Change-Id: I8f34eeb9f8f7b56fcbb4deb59ac51b2d0907ff6c
Reviewed-on: https://chromium-review.googlesource.com/c/1296473
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56902}

Bug: v8:8329
Change-Id: I5be972698809ca77a621bb960cbc6a23b9f0f4b0
Reviewed-on: https://chromium-review.googlesource.com/c/1296474Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56901}

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:830557
Change-Id: I598a8591559c489944da6aa06fea793aaed0fa6e
Reviewed-on: https://chromium-review.googlesource.com/c/1296479Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56900}

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:830557
Change-Id: Ie9022b04cb5858654c6903f38031c860e8681b9e
Reviewed-on: https://chromium-review.googlesource.com/c/1296478Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56899}

NOTRY=true

Bug: v8:8291
Change-Id: Iae948ef9de027f86702accf34487524fd1c6b538
Reviewed-on: https://chromium-review.googlesource.com/c/1296455
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56898}

This is the last method which modified the Result after construction.
Turn this into a named constructor instead.

Drive-by: Replace a Result<bool> by VoidResult, since the bool is not
used anywhere.

R=mstarzinger@chromium.org

Bug: v8:8238
Change-Id: I352e0687e99a90e6ad00587d6fdf388f68c9b60a
Reviewed-on: https://chromium-review.googlesource.com/c/1296271
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56897}

Instead, create it when needed and pass it down to the actual
compilation.
This saves memory by making the WasmCompilationUnit smaller and will
eventually allow us to implement the trap handler fallback correctly by
using an updated ModuleEnv in background compilation and tier up.

R=mstarzinger@chromium.org

Bug: v8:5277, v8:8343
Change-Id: I0dc3a37fb88e54eb4822dc99d58ff024f4b2a367
Reviewed-on: https://chromium-review.googlesource.com/c/1293953
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56896}

Update two more uses of {bool} instead of {UseTrapHandler}.

R=mstarzinger@chromium.org

Change-Id: I83715661a2238004a4cbccf271a2bf781ef2f44d
Reviewed-on: https://chromium-review.googlesource.com/c/1293952
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56895}

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:830557
Change-Id: I2dd9e040c0d29a49aa0a23283da67d550a110677
Reviewed-on: https://chromium-review.googlesource.com/c/1296453Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56894}

This is to prepare larger refactorings that reduce the amount of
information stored in the WasmCompilationUnits and avoid ever storing
the ModuleEnv. Instead, we will generate it when needed. This will
allow us to correctly switch from a trap-handler configuration to
non-trap-handler.

R=mstarzinger@chromium.org

Bug: v8:8343, v8:5277
Change-Id: I383a8105448ccdcae1148ddfebd74db70c648ecf
Reviewed-on: https://chromium-review.googlesource.com/c/1293951Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56893}

Bug: v8:8351
Change-Id: I6ea08e0eb8b77a578a6a4fbe3eb0b96e6c3a0f95
Reviewed-on: https://chromium-review.googlesource.com/c/1296451Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56892}

All configs auto-generated with https://crrev.com/c/1270796.

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:830557
Change-Id: Ie421a3a01bbcd996297ab3a8585dd6f116e29886
Reviewed-on: https://chromium-review.googlesource.com/c/1296449Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56891}

This is to fix test262 tests which expect that there is no arguments
object.

Bug: v8:7186
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I56205c29609666dc832297e4d36a4d487eae36cc
Reviewed-on: https://chromium-review.googlesource.com/c/1291469Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56890}

This reverts commit c92a1dda.

Reason for revert: Breaks arm sim: https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux%20-%20arm%20-%20sim/15207

Original change's description:
> [cpu-profiler] Fix a bug which caused a pure virtual function call
> 
> We need to remove each Sampler from the SamplerManager before we call
> the Sampler destructor. This is because the signal handler can interrupt
> the destructor, and call DoSampler(), which calls sampler->SampleStack()
> on the sampler being destructed, causing general unhappiness and
> "Pure virtual function called!" crashes.
> 
> Bug: v8:8346, v8:5193
> Change-Id: Iaa595a196eab33fb1af31584e9a68fd1ce0a18f6
> Reviewed-on: https://chromium-review.googlesource.com/c/1293949
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Alexei Filippov <alph@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56882}

TBR=alph@chromium.org,yangguo@chromium.org,petermarshall@chromium.org

Change-Id: I517e07d75045f6253e7f12714304fba77959fbc2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8346, v8:5193
Reviewed-on: https://chromium-review.googlesource.com/c/1296472Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56889}

Change-Id: I403a6c5124f560d47a3b5d54d79bf54563207c1e
Reviewed-on: https://chromium-review.googlesource.com/c/1296269Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56888}

Previously we'd first accumulate errors to the parent and validate the
destructuring pattern in the parent. In the case of ParseArguments this
will invalidly propagate binding pattern errors from one argument to the
next. The reason why ParseArguments keeps track of binding pattern errors
is because it could also be used to parse async arrow function parameters.
If we see async(a,b) we don't yet know whether this is the head of an
async arrow function, or a call to async with arguments a and b.

Bug: v8:8241
Change-Id: I670ab9a9c6f2e0bee399808b02a465ae1afa7c3f
Reviewed-on: https://chromium-review.googlesource.com/c/1296229
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56887}

Previous version:
https://chromium-review.googlesource.com/c/v8/v8/+/1292058

BUG=v8:8179
TBR=hpayer@chromium.org, gsathya@chromium.org

Change-Id: Ia79b75a0630c5926e59206c29053addc88bfb6fe
Reviewed-on: https://chromium-review.googlesource.com/c/1296210Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56886}

All configs auto-generated with https://crrev.com/c/1270796/9.

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:830557
Change-Id: Ibc56891314907c0de393ce6858cac1450664e4c6
Reviewed-on: https://chromium-review.googlesource.com/c/1296270Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56885}

In the ElementsAccessor fast-path for Array.prototype.includes, we
iterate backing-store elements according to start and length numbers
which might or might not be within the JSArray::length field, for
example when side-effects changed the receiver while start and length
are computed. So even when we have a packed ElementsKind, we might still
observe the hole. This is fine, since logical out-of-bounds accesses
are safe in this case, but it means we must not rely on the
ElementsKind telling us if we can encounter holes.

Bug: chromium:897098
Change-Id: I17db38246aef6edbdd5cee30598cbf7619aba6d8
Reviewed-on: https://chromium-review.googlesource.com/c/1293571Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56884}

The DEPS file was already up to date, so we only had to update the hash.

R=herhut@chromium.org

Change-Id: Ibbf960e140746b522339cb8f649691a08f4cd485
Reviewed-on: https://chromium-review.googlesource.com/c/1293576Reviewed-by: Stephan Herhut <herhut@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56883}

We need to remove each Sampler from the SamplerManager before we call
the Sampler destructor. This is because the signal handler can interrupt
the destructor, and call DoSampler(), which calls sampler->SampleStack()
on the sampler being destructed, causing general unhappiness and
"Pure virtual function called!" crashes.

Bug: v8:8346, v8:5193
Change-Id: Iaa595a196eab33fb1af31584e9a68fd1ce0a18f6
Reviewed-on: https://chromium-review.googlesource.com/c/1293949
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56882}

This change added Windows ARM64 ABI support, major things are:
1. Excluding x18 register from any usage because it is reserved as
   platform register. Preserve alignment after the change.
2. Fix the assumption of LP64 in arm64 backend. Windows ARM64 is
   still LLP64.
3. Stack guard page probe for large allocation on stack.

Reference:
Windows ARM64 ABI:
https://docs.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=vs-2017

Bug: chromium:893460
Change-Id: I325884ac8dab719154a0047141e18a9fcb8dff7e
Reviewed-on: https://chromium-review.googlesource.com/c/1285129
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56881}

This CL replaces the stack trace parameter with a the array that is
usually passed to the JS prepareStackTrace callback. This allows two
important goals to be realized: 1) we can easily stringify individual
frames and 2) we can (if needed) call back into JS from this callback
with a usable structure. If, as is sometimes the case, a v8::StackTrace
is needed, |v8::Exception::GetStackTrace| can be used on the exception
that is passed to PrepareStackTraceCallback.

Bug: v8:7637

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I57fa1f2b4552cc7f69351fe0918f4e59e3f5fce1
Reviewed-on: https://chromium-review.googlesource.com/c/1266698Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56880}

Currently Torque's Array.prototype.slice creates holey arrays for those
that don't fit in new space in its slow path (by calling
ArraySpeciesCreate), even if the source is packed. This creates regression
on packed arrays where TurboFan optimizes and then deoptimizes because
the maps don't match.
See https://chromeperf.appspot.com/report?sid=4553b0826123337f5026fd6b4a285d5fc3cd77cafb515ddd954d195630642730

This CL reduces the chance that Torque's Array.prototype.slice returns
holey arrays. In particular, in the case of a large FastJSArray,
ExtractFastJSArray can still be used because it can handle large objects,
and will return a packed array if the source array is also packed.

Change-Id: I691cf48e07c699e5d42afda0bea6cbdc117b653f
Reviewed-on: https://chromium-review.googlesource.com/c/1293372Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56879}

This builtin was initially used to create the promise for an async
function, but that is now done by the AsyncFunctionEnter intrinsic.

Bug: v8:7253
Change-Id: I90d0bb31c1548bbfdb53833a5c06161db368f4f0
Reviewed-on: https://chromium-review.googlesource.com/c/1296129Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56878}

Bug: chromium:897074
Change-Id: I65894046064a230847f3e629e56d8a171546aa51
Reviewed-on: https://chromium-review.googlesource.com/c/1293950Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56877}

Add missing typing rules for calls to Promise builtins. All of these
return receivers always, since PromiseCapabilities.[[Promise]] can be
any receiver essentially. Adding the typing rules here helps to rule
out unnecessary Smi checks in the general case.

Bug: v8:7253
Change-Id: Ia51546420f331431872183a92702855f91b7daba
Reviewed-on: https://chromium-review.googlesource.com/c/1293956Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56876}

Move Normalize into intl-objects.*
Move V8BreakIterator code to js-break-iterator*
Add heap-symbol for breakType of JSBreakIterator

Bug: v8:5751
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Id25af28770ae3c0b7716f4e3b602d4b040194a7d
Reviewed-on: https://chromium-review.googlesource.com/c/1293110
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56875}

BUG=chromium:889545

Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ic00ffa9968cffaf2e20682e247747b5f7dc0f145
Reviewed-on: https://chromium-review.googlesource.com/c/1285394
Commit-Queue: Alexei Filippov <alph@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56874}

Fold methods from intl.* to objects/intl-objects.*
Move Isolate* to the first parameter for some method
Move ICUSerice type under Intl
Hide ICUTimeZoneCache under a CreateTimeZoneCache factory method.

Bug: v8:5751
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ie6f6a1ceee789333a077c1965de8e11d8c15c175
Reviewed-on: https://chromium-review.googlesource.com/c/1293109
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56873}

Full custom preview generation is moved to custom-preview file
including frontend part. New custom preview implementation returns
body getter function instead of bind function, formatter and config
objects. Body getter function calls formatter.body(object, config)
and returns json ML.

R=dgozman@chromium.org

Bug: chromium:595206
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I14ff3d8abb4a47d2bbc2e6eaa1835fc362ac7369
Reviewed-on: https://chromium-review.googlesource.com/c/1292686
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56872}

R=joransiu@ca.ibm.com

Change-Id: Ia33e925339c66fcefb9c3739c1985477190dab44
Reviewed-on: https://chromium-review.googlesource.com/c/1294372Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#56871}

Bug: chromium:897514
Change-Id: Ie7950a2caa2e63e102096a6a36475351259ea854
Reviewed-on: https://chromium-review.googlesource.com/c/1293955
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56870}