This reverts commit 6202c445.

Reason for revert: times out on arm https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8921075891748393232/+/steps/Check_-_default/0/logs/console-profile-wasm/0

Original change's description:
> [inspector] Add wasm profiling test
> 
> This adds a first simple test to check that CPU profiles contain wasm
> function names.
> 
> R=​herhut@chromium.org, kozyatinskiy@chromium.org
> 
> Bug: v8:8783
> Change-Id: I26b1fd2b7ec555c073d80a464ee8a799b017b07a
> Reviewed-on: https://chromium-review.googlesource.com/c/1454597
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Stephan Herhut <herhut@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59703}

TBR=yangguo@chromium.org,kozyatinskiy@chromium.org,clemensh@chromium.org,herhut@chromium.org

Change-Id: Ib211a38a32ee08c18e4a19f05d9fc68d6a2d2901
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8783
Reviewed-on: https://chromium-review.googlesource.com/c/1475914Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59704}

This adds a first simple test to check that CPU profiles contain wasm
function names.

R=herhut@chromium.org, kozyatinskiy@chromium.org

Bug: v8:8783
Change-Id: I26b1fd2b7ec555c073d80a464ee8a799b017b07a
Reviewed-on: https://chromium-review.googlesource.com/c/1454597
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59703}

This removes an outdated section order check from {CreateNewBuffer} and
relies solely on the checks done in {ProcessSection}. Those checks are
more comprehensive and will remain coherent with synchronous decoding.

R=ahaas@chromium.org
TEST=mjsunit/regress/wasm/regress-8846
BUG=v8:8846

Change-Id: Id0cdc3bf3ad78f7970c9fceff66a17ab20f4666b
Reviewed-on: https://chromium-review.googlesource.com/c/1477211Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59702}

This is a reland of 932a5ca8

Original change's description:
> [heap] Enable large objects in young generation
>
> Bug: chromium:852420
> Change-Id: Id1cde3450c5ca046029b17eee5dbe5132f299c3d
> Reviewed-on: https://chromium-review.googlesource.com/c/1477212
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59669}

Bug: chromium:852420
Change-Id: If6dc439e410542da72c3edc08c9926b3edd1186e
Reviewed-on: https://chromium-review.googlesource.com/c/1477736Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59701}

Also disables tests in Lite mode that currently fail with lazy source
positions.

Bug: v8:8510
Change-Id: Id27b7cb31682559173b137ef51eaf06d517ee9ec
Reviewed-on: https://chromium-review.googlesource.com/c/1477129
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59700}

R=jgruber@chromium.org

Change-Id: I03c1aec177c389bf4d6550a26ad30d870e10135a
Reviewed-on: https://chromium-review.googlesource.com/c/1477738
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59699}

This adds a new hint type for live ranges that allows the control
flow aware allocation to hint the register that should be used on
reload. Avoid unnecessary register to register moves and helps
with code size.

Change-Id: I01e870514446eab3bffb89b2e00644bd215b81d5
Reviewed-on: https://chromium-review.googlesource.com/c/1460944Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59698}

This allows non-monolithic embedders to always allocate memory
for ArrayBuffer instances using the right allocation method.

This is based on a patch that Electron is currently using.

Refs: https://github.com/electron/electron/blob/1898f9162073910c05958295c612deec6121a892/patches/common/v8/array_buffer.patch
Change-Id: I39a614343118a0594aab48699a99cc2aad5b7ba9
Reviewed-on: https://chromium-review.googlesource.com/c/1462003Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59697}

The allocation observer step should be called only after the page flags
of the young large object are properly set up.

Bug: chromium:852420
Change-Id: I9f537a7c1d6b7aa15ccbe58006e3957a2ec2ab5c
Reviewed-on: https://chromium-review.googlesource.com/c/1477735Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59696}

This fixes ~15 debug/inspector tests that were failing when
v8_enable_lazy_source_positions = true.

Bug: v8:8510
Change-Id: Ica02aa2ea84549b5cddd82b5b98835829f7b0f1b
Reviewed-on: https://chromium-review.googlesource.com/c/1477280
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59695}

This change will enable basic "goto definition" support in the upcoming
Torque language server.

R=tebbi@chromium.org

Bug: v8:7793
Change-Id: I8e50cc58288991a2f6024d06bf38f4fd66f21eea
Reviewed-on: https://chromium-review.googlesource.com/c/1477055
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59694}

These are supported by the try bots but were missing from the set.

NOTRY=true

Change-Id: Ie12801ee953b14a7f94588efc64b8c57caa6d720
Reviewed-on: https://chromium-review.googlesource.com/c/1477052Reviewed-by: Stephan Herhut <herhut@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59693}

Since the comments are copied from the std types anyway, we should also
point to them to make clear that the semantic is intentially equivalent.

Also, remove two unused methods and avoid an unneeded nullptr check.

R=mlippautz@chromium.org

Bug: v8:8834
Change-Id: Idcb5a1b8b2b3bb0786807828a96e085df963a8f0
Reviewed-on: https://chromium-review.googlesource.com/c/1477224Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59692}

R=clemensh@chromium.org
TEST=cctest/test-run-wasm-exceptions
BUG=v8:8729

Change-Id: I3751599bd72aaae1a9816e728437c64daf465f41
Reviewed-on: https://chromium-review.googlesource.com/c/1477733
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59691}

This reverts commit d74840b7.

Reason for revert: breaks stress sampling profiler

Original change's description:
> Reland "[heap] Enable large objects in young generation"
> 
> This is a reland of 932a5ca8
> 
> The GC stress failure was caused by v8:8801
> 
> Original change's description:
> > [heap] Enable large objects in young generation
> >
> > Bug: chromium:852420
> > Change-Id: Id1cde3450c5ca046029b17eee5dbe5132f299c3d
> > Reviewed-on: https://chromium-review.googlesource.com/c/1477212
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#59669}
> 
> Bug: chromium:852420
> Change-Id: I1fd28869f21715798fe49508efb7f3a622803ffc
> Reviewed-on: https://chromium-review.googlesource.com/c/1477218
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59683}

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

Change-Id: Ieb81de35df1ccb9ef5c6d59c13f34ba294b848ed
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:852420
Reviewed-on: https://chromium-review.googlesource.com/c/1477732Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59690}

These are no longer needed now that JS builtins have been fully
removed.

The internal match usage in assert.js has been replaced by a custom
miniparser. The internal replace use in various string builtins was
replaced by manual global string replacement in a runtime function.

Bug: v8:8842,v8:7624
Change-Id: Ieb49c694662a13e84fd9fd2fe5d0412b8e0574da
Reviewed-on: https://chromium-review.googlesource.com/c/1473030Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Peter Wong <peter.wm.wong@gmail.com>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59689}

Bug: chromium:926189
Change-Id: Ibd90f3cfdb37f07f3668f9ad79cff6e4305dc874
Reviewed-on: https://chromium-review.googlesource.com/c/1477674Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59688}

NOTRY=true

Bug: chromium:853202
Change-Id: Ieafb30e2aebedcab3e62c2659e7d093399068fb2
Reviewed-on: https://chromium-review.googlesource.com/c/1477222Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59687}

R=mslekova@chromium.org

Bug: v8:7790
Change-Id: I8866ac4a386d535e7c6c00454d93236340ea4fc3
Reviewed-on: https://chromium-review.googlesource.com/c/1477282Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59686}

Fixes cctest/test-cpu-profiler/DetailedSourcePositionAPI by ensuring
that source positions are available when starting an optimize job when
NeedsDetailedOptimizedCodeLineInfo is set. Also collects source
positions when inlining functions and adds a new test for this.

Bug: v8:8510
Change-Id: I9d84e37f3c8b638db080f6ec4b6633cdd7e3ee2f
Reviewed-on: https://chromium-review.googlesource.com/c/1472634Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59685}

The histogram is not used anymore. Remove to safe resources.

Bug: chromium:926072
Change-Id: I929f34f7ab0613431eaf9740f3342b6b2cec6cbd
Reviewed-on: https://chromium-review.googlesource.com/c/1477672Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59684}

This is a reland of 932a5ca8

The GC stress failure was caused by v8:8801

Original change's description:
> [heap] Enable large objects in young generation
>
> Bug: chromium:852420
> Change-Id: Id1cde3450c5ca046029b17eee5dbe5132f299c3d
> Reviewed-on: https://chromium-review.googlesource.com/c/1477212
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59669}

Bug: chromium:852420
Change-Id: I1fd28869f21715798fe49508efb7f3a622803ffc
Reviewed-on: https://chromium-review.googlesource.com/c/1477218Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59683}

Updates CloneIC builtin to take the CloneIC_slow path when there is no
feedback vector. Also fixes the CloneIC_Slow to handle proxies correctly.

StoreInArrayLiteralIC doesn't change the behaviour but just makes it
consistent with other ICs.

Bug: v8:8293
Change-Id: Ib824b3ef06db1595ce06f04669857bb957cbe072
Reviewed-on: https://chromium-review.googlesource.com/c/1475750
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59682}

to kTaggedSize or kSystemPointerSize.

Like X64's CLs, but combined:
https://chromium-review.googlesource.com/c/v8/v8/+/1384092
https://chromium-review.googlesource.com/c/v8/v8/+/1384309 and
https://chromium-review.googlesource.com/c/v8/v8/+/1473291

Bug: v8:8477, v8:8834
Change-Id: I832999996a0b56bd34ec6aa4fd86d9a5476e1065
Reviewed-on: https://chromium-review.googlesource.com/c/1477215
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59681}

This reverts commit 1a3a2bc3.

Reason for revert: Only CL in a reverted roll (https://chromium-review.googlesource.com/c/chromium/src/+/1477147)

Original change's description:
> Fix accessor update of non-extensible maps.
> 
> When installing getter/setter of non-extensible map with existing
> setter/getter of the same name, we introduce a new transition
> (so we have two transitions with the same name!). This triggers
> an assertion in map updater.
> 
> This fix carefully checks that on the back-pointer path from
> non-extensible map to the extensible map there are only
> integrity level transitions. Otherwise, we just bail out.
> 
> Bug: chromium:932953
> Change-Id: I02e91c3b652428a84a9f5c58b6691ea9b1fc44d6
> Reviewed-on: https://chromium-review.googlesource.com/c/1477067
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59667}

TBR=jarin@chromium.org,ishell@chromium.org

Change-Id: I9264423c605cebef87beb6c0f066e90b59faae48
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:932953
Reviewed-on: https://chromium-review.googlesource.com/c/1477219Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59680}

There are now less that 400 days until the end of life
of Python 2(aka _legacy_ Python) https://pythonclock.org/ .
The code compatibility check for python2 and python3
used the following tools: futurize, flake8
You can see the reports here: https://travis-ci.com/bmsdave/v8/builds

This CL was uploaded by git cl split.

Bug: v8:8594
Change-Id: Idbf467daf629a4e808345a6a88036c2a3f259138
Reviewed-on: https://chromium-review.googlesource.com/c/1470121
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59679}

There are now less that 400 days until the end of life
of Python 2(aka _legacy_ Python) https://pythonclock.org/ .
The code compatibility check for python2 and python3
used the following tools: futurize, flake8
You can see the reports here: https://travis-ci.com/bmsdave/v8/builds

This CL was uploaded by git cl split.

Bug: v8:8594
Change-Id: I2a90aaecb270f03aed1c0fc92da1a0e2621b0eb2
Reviewed-on: https://chromium-review.googlesource.com/c/1470101
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59678}

There are now less that 400 days until the end of life
of Python 2(aka _legacy_ Python) https://pythonclock.org/ .
The code compatibility check for python2 and python3
used the following tools: futurize, flake8
You can see the reports here: https://travis-ci.com/bmsdave/v8/builds

This CL was uploaded by git cl split.

Bug: v8:8594
Change-Id: Id7e2f3d5751d9f0428d28f92106748d71db0042e
Reviewed-on: https://chromium-review.googlesource.com/c/1470122Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59677}

This restores assertion scope marking in the bta command making it
obvious which frames disallowed heap allocation for instance.

Change-Id: Ie99ff06df95b6ab6820e53798b12b1cd1bd97338
Reviewed-on: https://chromium-review.googlesource.com/c/1477213Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59676}

There are now less that 400 days until the end of life
of Python 2(aka _legacy_ Python) https://pythonclock.org/ .
The code compatibility check for python2 and python3
used the following tools: futurize, flake8
You can see the reports here: https://travis-ci.com/bmsdave/v8/builds

This CL was uploaded by git cl split.

Bug: v8:8594
Change-Id: I661c52a70527e8ddde841fee6d4dcba282b4a938
Reviewed-on: https://chromium-review.googlesource.com/c/1470123
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59675}

The test is sensitive to bytecode flushing.

Bug: v8:8801
Change-Id: I2e290246681c014838be7411cc0ff68fd44c3590
Reviewed-on: https://chromium-review.googlesource.com/c/1477217Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59674}

The access made unsafe were chosen according what's hot in
JSTests/Regexp and Octane/regexp.

Bug: chromium:932919
Change-Id: I8229370f2dd7d0937e9d561f6957fb9dba6d6a25
Reviewed-on: https://chromium-review.googlesource.com/c/1477270Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59673}

This reverts commit 932a5ca8.

Reason for revert: breaks GC stress

Original change's description:
> [heap] Enable large objects in young generation
> 
> Bug: chromium:852420
> Change-Id: Id1cde3450c5ca046029b17eee5dbe5132f299c3d
> Reviewed-on: https://chromium-review.googlesource.com/c/1477212
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59669}

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

Change-Id: I16f0705cf37fdc1708c605abd76d79dac3f1e825
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:852420
Reviewed-on: https://chromium-review.googlesource.com/c/1477278Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59672}

This reverts commit 49de5875.

Reason for revert: breaks TSAN

Original change's description:
> [heap] Perform more embedder tracing in incremental marking step
> 
> This should fix GC latency regressions introduced in 4c6598.
> 
> Bug: chromium:926189, chromium:930844, chromium:930693,chromium:931629
> Change-Id: I81c91829badbeea82d6e44670d07794632869424
> Reviewed-on: https://chromium-review.googlesource.com/c/1477216
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59668}

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

Change-Id: Iac914fe695740558f0fac3ad0172f48114b57312
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:926189, chromium:930844, chromium:930693, chromium:931629
Reviewed-on: https://chromium-review.googlesource.com/c/1477277Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59671}

When setting up the initial map for a (class or function) constructor,
we always over-allocate a bunch of in-object properties, in case not
all property assignments happen as `this.prop = val` assignments in
the constructor. However this over-allocation was a bit too aggressive
and added a slack of 8 to each class constructor (plus a minimum of
two, when there was no `this.prop = val` assignment). So in total this
would yield an object with initially 40 in-object property slots in
case of a simple class hierarchy like this:

```js
class A {};
class B extends A {};
class C extends B {};
class D extends C {};
new D;
```

While the slack tracking takes care of eventually shrinking the objects
to appropriate sizes, this aggressive over-allocation is still going to
hurt performance quite a bit in the beginning, and will also lead to
more traffic on the minor GC for now good reason.

Instead of the above, we now allocate a minimum of 2 in-object
properties per class (in a hierarchy) and then add a slack of 8 in the
end. Meaning for the example above we end up with 16 initial in-object
property slots, which seems sensible.

Bug: v8:8853
Change-Id: I4a11e35a8612ceef1d776ca2f0543a26c8c2a2bf
Reviewed-on: https://chromium-review.googlesource.com/c/1477276Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59670}

Bug: chromium:852420
Change-Id: Id1cde3450c5ca046029b17eee5dbe5132f299c3d
Reviewed-on: https://chromium-review.googlesource.com/c/1477212Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59669}

This should fix GC latency regressions introduced in 4c6598.

Bug: chromium:926189, chromium:930844, chromium:930693,chromium:931629
Change-Id: I81c91829badbeea82d6e44670d07794632869424
Reviewed-on: https://chromium-review.googlesource.com/c/1477216Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59668}

When installing getter/setter of non-extensible map with existing
setter/getter of the same name, we introduce a new transition
(so we have two transitions with the same name!). This triggers
an assertion in map updater.

This fix carefully checks that on the back-pointer path from
non-extensible map to the extensible map there are only
integrity level transitions. Otherwise, we just bail out.

Bug: chromium:932953
Change-Id: I02e91c3b652428a84a9f5c58b6691ea9b1fc44d6
Reviewed-on: https://chromium-review.googlesource.com/c/1477067Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59667}

Googletest is (at last) converging with industry-standard terminology
[1]. We previously called test suites "test cases", which was rather
confusing for folks coming from any other testing framework.

Chrome now has a googletest version that supports _TEST_SUITE_ macros
instead of _TEST_CASE_, so this CL cleans up some of the outdated usage.

[1] https://github.com/google/googletest/blob/master/googletest/docs/primer.md#beware-of-the-nomenclature

Bug: chromium:925652
Change-Id: I3cd02b9fa6dbece1594bbfd50a21ad7503c2aab9
Reviewed-on: https://chromium-review.googlesource.com/c/1475654Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59666}

FromTopOrLimit was both created and renamed to FromAllocationAreaAddress
as part of https://codereview.chromium.org/1900423002/

Bug: v8:8562
Change-Id: I117cc566ed3a420c4419f0f0645c2e200be57def
Reviewed-on: https://chromium-review.googlesource.com/c/1477214Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#59665}