This is just a cleanup patch.

BUG=none

Review-Url: https://codereview.chromium.org/2921623006
Cr-Commit-Position: refs/heads/master@{#45669}

This is in an effort to narrow down the root cause of the
referenced, very flaky, bug.

Bug: chromium:725559
Change-Id: I8235983fea6f579d228e81177fdcac9ef6115d1f
Reviewed-on: https://chromium-review.googlesource.com/521923Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45668}

This patch adds ability to connect multiple sessions to a single context group. This is an experimental feature, which is already supported in test harness.

So far covered runtime domain with tests (and found a bug thanks to the test). More tests to follow in next patches, probably with code adjustments as well.

BUG=chromium:590878

Review-Url: https://codereview.chromium.org/2906153002
Cr-Commit-Position: refs/heads/master@{#45667}

Similar to marking, seed the pointers updating with items.

Bug: chromium:726040
Change-Id: Iaa480d153de96d744c425c478c68e7629550c85a
Reviewed-on: https://chromium-review.googlesource.com/521145Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45666}

BUG=chromium:724972

R=clemensh@chromium.org, rossberg@chromium.org

Review-Url: https://codereview.chromium.org/2917603002
Cr-Commit-Position: refs/heads/master@{#45665}

Bug: v8:5717, v8:6354, v8:6410
Change-Id: Ie652f4358f2a68c7ea76d546e26a6b4fb815df4a
Reviewed-on: https://chromium-review.googlesource.com/518923
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45664}

Currently x instanceof Map/Set checks cannot take the fast path, since
the Map/Set constructor has dictionary properties. To avoid that, just
forcibly migrate the Map/Set constructor to fast properties again once
it's fully setup in the bootstrapper.

Bug: v8:5717, v8:5902
Change-Id: I23dfd00456c9206a0ca5af71dfbc9236982936fc
Reviewed-on: https://chromium-review.googlesource.com/520578
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45663}

Add support for S1x4And, S1x4Or, S1x4Xor, S1x4Not, S1x4AnyTrue,
S1x4AllTrue, S1x8And, S1x8Or, S1x8Xor, S1x8Not, S1x8AnyTrue,
S1x8AllTrue, S1x16And, S1x16Or, S1x16Xor, S1x16Not, S1x16AnyTrue,
S1x16AllTrue, SimdLoad, SimdStore operations for mips32 and mips64
architectures.

BUG=

Review-Url: https://codereview.chromium.org/2801683003
Cr-Commit-Position: refs/heads/master@{#45662}

This fixes an issue with ful-codegen where code target entries for the OSR
check were being incorrectly shared. We now explicitly disable sharing of code
target constant pool entries for full-codegen and for calls to builtins from
WASM code, using a scope.

BUG=chromium:725743

Review-Url: https://codereview.chromium.org/2922433002
Cr-Commit-Position: refs/heads/master@{#45661}

R=clemensh@chromium.org
TEST=mjsunit/asm/regress-719866
BUG=chromium:719866

Change-Id: I6cc9f222769aa036275654286c9c6271ef2d1334
Reviewed-on: https://chromium-review.googlesource.com/520945Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45660}

Revert "Reland "[runtime] Pass global proxy as receiver to native accessors in case of contextual access""

This reverts commit ba8a7539.

Reason for revert: A layout test is unhappy:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/16010

Original change's description:
> Reland "[runtime] Pass global proxy as receiver to native accessors in case of contextual access"
> 
> Based on past discussions I'm going to try to reland this change. This makes window.document and document behave the same after navigation, which is a change from what the spec says. If this works out though, it would greatly simplify the spec; and fix the fact that currently it's leaking the underlying global object, which we don't want for security and object-identity reasons.
> 
> Bug: chromium:713732
> Change-Id: I835ef510fc78f04c602434a7cec6420e027c4012
> Reviewed-on: https://chromium-review.googlesource.com/520764
> Commit-Queue: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45654}

TBR=haraken@chromium.org,verwaest@chromium.org
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:713732

Change-Id: Iecde1cd855c21efa73939bbfbff0c26540ee2d98
Reviewed-on: https://chromium-review.googlesource.com/521045Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45659}

SRWLOCK is a faster and lightweight alternative of CRITICAL_SECTION for
non-recursive use case.

Bug: chromium:592752
Change-Id: Ie97cd9cee2d50a95f316b41c30e953f586b06c99
Reviewed-on: https://chromium-review.googlesource.com/520828Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45658}

Furthermore avoid lock-step between pointer updating phases as they
should execute in parallel without synchronization restrictions.

This reverts commit bc6adb86.

Bug: chromium:726040
Change-Id: I1713d4333f0ce1604ff51c02461f3ef91e4bdaed
Reviewed-on: https://chromium-review.googlesource.com/521062Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45657}

On left trimming the main thread ensures that the array
is black before changing its map and length.

The concurrent marker snapshots the length of the array
and then tries to change its color to black. If the change
is successful, then the array is iterated using the saved
length.


BUG=chromium:694255

Change-Id: Ib06c1c9c3240ace56c1897e5a73462aa447d41f5
Reviewed-on: https://chromium-review.googlesource.com/519323Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45656}

Embedders should use Module::InstantiateModule

R=neis@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Iebd5beeeeb9ea7025c61b97b666827e0a6ec89ad
Reviewed-on: https://chromium-review.googlesource.com/519162Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45655}

Based on past discussions I'm going to try to reland this change. This makes window.document and document behave the same after navigation, which is a change from what the spec says. If this works out though, it would greatly simplify the spec; and fix the fact that currently it's leaking the underlying global object, which we don't want for security and object-identity reasons.

Bug: chromium:713732
Change-Id: I835ef510fc78f04c602434a7cec6420e027c4012
Reviewed-on: https://chromium-review.googlesource.com/520764
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45654}

On ia32, AssembleMove used to emit different code depending on whether
the to-be-moved heap object is in new space or not. This may have been
necessary in the past but is no longer. Moreoever, it's incompatible
with running off-thread. With this CL, we don't do the new-space check
and just emit a mov.

R=mstarzinger@chromium.org

Bug: v8:6048
Change-Id: I93abd61a5f290311a431edee3d4fa0a240d52085
Reviewed-on: https://chromium-review.googlesource.com/519248Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45653}

Use relaxed reads to allow changing the pointer concurrently in the 
GC. The layout descriptor will either be fast and there's nothing
to be done, or it will be slow, and we will use the forwarding
pointer to determine the proper version to use.

Bug: chromium:726040
Change-Id: I0a376752c3a99abf0874070387fcaeb3cee0dcb2
Reviewed-on: https://chromium-review.googlesource.com/519346
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45652}

Switch to use Win32 CONDITION_VARIABLE like Chromium.

This greatly simplifies the implementation of ConditionVariable
class for Windows with better performance.

Bug:NO

Change-Id: Iea5e5cb80520a966aeb687bebb4b5256396cb13b
Reviewed-on: https://chromium-review.googlesource.com/519542Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45651}

Visitor id for JSObjects does not depend on the instance size.

BUG=chromium:694255

Change-Id: I6b4b559207609f4a4c19373572be6692a55c5187
Reviewed-on: https://chromium-review.googlesource.com/520763Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45650}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/0312f98..54fde1e

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/32a3f0b..e6ad063

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

Change-Id: I2c9f167618d17546e4df4abbed2da0d428226868
Reviewed-on: https://chromium-review.googlesource.com/520922Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45649}

Port 510ebfc3
Port 8f61fbc6

R=neis@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2920523002
Cr-Commit-Position: refs/heads/master@{#45648}

This fixes the counter inconsistencies while leaving the memory in an
inaccessible state.

Bug: chromium:724947
Change-Id: I431eb6fda84922a52dfb9380c6b482ada55bccee
Reviewed-on: https://chromium-review.googlesource.com/519164
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45647}

Bug: 
Change-Id: If4a5408f8ff63a8a2b189f60fda37896a9403d3d
Reviewed-on: https://chromium-review.googlesource.com/519386Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45646}

This reverts commit 33d5006e.

Reason for revert: Still failing TSAN: https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/15527/steps/Check%20-%20extra%20%28flakes%29/logs/regress-470804

Original change's description:
> Reland "[heap] Move pointers updating to ItemParallelJob""
> 
> Furthermore avoid lock-step between pointer updating phases as they
> should execute in parallel without synchronization restrictions.
> 
> This reverts commit 68a72399.
> 
> Bug: chromium:726040
> Change-Id: I76bb31d146f8aa20f8b7c486eeae9f09efa0cd53
> Reviewed-on: https://chromium-review.googlesource.com/518150
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45644}

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

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:726040
Change-Id: I96090250a6ecc5068c3c927e8435e0b605c3c335
Reviewed-on: https://chromium-review.googlesource.com/519409
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45645}

Furthermore avoid lock-step between pointer updating phases as they
should execute in parallel without synchronization restrictions.

This reverts commit 68a72399.

Bug: chromium:726040
Change-Id: I76bb31d146f8aa20f8b7c486eeae9f09efa0cd53
Reviewed-on: https://chromium-review.googlesource.com/518150
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45644}

Bug: chromium:724973
Change-Id: I227b30b50f92fac7d6cf3ec3369e324282352ccb
Reviewed-on: https://chromium-review.googlesource.com/514348Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45643}

When checking {const char*} (or similar) against each other, don't
print them as c strings on failure. Just print the pointer value.
In wasm, where we use byte pointers into wasm wire bytes, this was
sometimes hiding check failures behind segfaults which happened when
trying to output invalid pointers as c strings.
Anyway, it's more useful to see the raw pointer values in these cases.
Other use cases, where we really compare against c string pointers
should be rare in our code base.

R=ishell@chromium.org

Change-Id: I92a13221d18c987a97cf2a29ac8f454178ff2bb5
Reviewed-on: https://chromium-review.googlesource.com/517166
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45642}

In https://chromium-review.googlesource.com/c/505614/ I added code to
the test runner which deletes the old corpus of the wasm fuzzer. It's
time now to remove this code again.

R=machenbach@chromium.org

Change-Id: Ic3b8f7a1f6d725f0bf070b404a75ac37551a07c0
Reviewed-on: https://chromium-review.googlesource.com/519405Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45641}

DebugInfo was very closely tied to break point support:
* It contained only information relevant to break points.
* It was created and freed by break point implementation.
* Existence of a DebugInfo on the shared function info implied existence of
  break points.

This CL is a step towards making DebugInfo usable by other debugging
functionality such as block coverage by decoupling it from break point support,
which is now only one kind of information stored on the DebugInfo object.

BUG=v8:6000

Review-Url: https://codereview.chromium.org/2909893002
Cr-Commit-Position: refs/heads/master@{#45640}

Most prototype implementations are not fully supported in the
interpreter. This is the case at least for exception handling, simd, and
atomics. Any function can be redirected to the interpreter though,
either by passing --wasm-interpret-all, or by dynamically redirecting to
the interpreter for debugging.
Making the flags experimental keeps the fuzzer from playing around with
these flags.

Drive-by: Refactor tests which explicitly set the prototype flag to use
a new scope for that.

R=ahaas@chromium.org
BUG=chromium:727584

Change-Id: I67da79f579f1ac93c67189afef40c6524bdd4430
Reviewed-on: https://chromium-review.googlesource.com/519402
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45639}

Also restrict include/ rules to only add bots for changes affecting
headers

R=machenbach@chromium.org

Change-Id: I97dc3c6249994566912a82ac9fbf8c7d3a57890c
Reviewed-on: https://chromium-review.googlesource.com/519342Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45638}

V8 provides ScriptCompiler::CompileFunctionInContext method which takes expression and compile it as anonymous function like (function() .. expression ..). To produce correct locations for stmts inside of this expression V8 compile this function with negative offset. Instead of stmt position blackboxing use function start position which is negative in described case.

Bug: chromium:705963
Change-Id: I86b113198fb59e77b3bbf523c8cd943e22f8a6ca
Reviewed-on: https://chromium-review.googlesource.com/519384
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45637}

V8-side for:
https://chromium-review.googlesource.com/c/519143/

NOTRY=true

Bug: chromium:726584
Change-Id: Id6f186a47cfdf9287a399ce3fe58c9edb6474ed9
Reviewed-on: https://chromium-review.googlesource.com/519166Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45636}

Instead of allocating and embedding certain heap numbers into the code
during code assembly, emit dummies but record the allocation requests.
Later then, in Assembler::GetCode, allocate the heap numbers and patch
the code by replacing the dummies with the actual objects. The
RelocInfos for the embedded objects are already recorded correctly when
emitting the dummies.

R=jarin@chromium.org
BUG=v8:6048

Review-Url: https://codereview.chromium.org/2900683002
Cr-Commit-Position: refs/heads/master@{#45635}

Bug: chromium:726638
Change-Id: Ib30b147ec60f9f13c5164765f8c63be7a1339e9f
Reviewed-on: https://chromium-review.googlesource.com/517497Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45634}

This reverts commit c5aad5f2
The CL was reverted due to missing Chromium dependencies.

This commit removes the simulator trace-based tests, and the associated header file dependencies, previously pulled in by DEPS. The NEON support now has only hand-written tests, in test-assembler-arm64.cc. The remaining tests can be added in a later patch.

BUG=chromium:718439

Original issue's description:
> Reland "ARM64: Add NEON support"
>
> This reverts commit cc047635.
> The CL was reverted due to a missing DEPS mirror.
>
> Original issue's description:
> > ARM64: Add NEON support
> >
> > Add assembler, disassembler and simulator support for NEON in the ARM64 backend.
> >
> > BUG=
> >
> > Review-Url: https://codereview.chromium.org/2622643005
> > Cr-Commit-Position: refs/heads/master@{#44306}
>
> BUG=
>
> Review-Url: https://codereview.chromium.org/2812573003
> Cr-Commit-Position: refs/heads/master@{#44652}

Review-Url: https://codereview.chromium.org/2896303003
Cr-Commit-Position: refs/heads/master@{#45633}

BUG=v8:6277

Change-Id: I80314e6c5146e1f5021d07081b9eda3da5da6834
Reviewed-on: https://chromium-review.googlesource.com/518047
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45632}

Chromium dropped this a while back. This'll prepare switching the bot to GN.

NOTRY=true

Bug: chromium:726584
Change-Id: I55d7ef7ae33b66c1ca6721acba018aa19438e2da
Reviewed-on: https://chromium-review.googlesource.com/519404
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45631}

R=jarin@chromium.org

Bug: v8:6048
Change-Id: I685a629dec46d40c3518096b0a5d3901048e0bee
Reviewed-on: https://chromium-review.googlesource.com/519165Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45630}