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Mythri Alle 338799cd18 Revert "Reland "[TurboFan] Don't serialize read-only heap objects"" 
This reverts commit a4db68d462.

Reason for revert: Speculatively reverting: failure on win32 bot
https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug/23495
Not sure if the test is flaky or this cl is actually making it flaky. Reverting while I investigate this issue.

Original change's description:
> Reland "[TurboFan] Don't serialize read-only heap objects"
> 
> Reland the cl with fixes to TSAN failures.
> 
> This reverts commit 03c9de7348.
> 
> 
> Original change's description:
> > Revert "[TurboFan] Don't serialize read-only heap objects"
> >
> > This reverts commit 9f18e55ff0.
> >
> > Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/29660
> >
> > Original change's description:
> > > [TurboFan] Don't serialize read-only heap objects
> > >
> > > Read-only heap objects are immutable and immovable. It is safe to access
> > > these objects directly from the heap. Not having to serialize them
> > > reduces the time we spend on main thread especially for TurboProp.
> > >
> > > Bug: v8:9684
> > > Change-Id: Ibabb7076af50c9007d2a8ed57fe257406958fb6a
> > > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1955596
> > > Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> > > Reviewed-by: Maya Lekova <mslekova@chromium.org>
> > > Commit-Queue: Mythri Alle <mythria@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#65490}
> >
> > TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org
> >
> > Change-Id: If2d8649cdc083f7d064684352501320a96a1ba2c
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: v8:9684
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1973732
> > Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> > Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#65492}
> 
> TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: v8:9684
> Change-Id: I54c9973d0f4d88504b2fb920feb3480fe1f1e1fc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1980573
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65584}

TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org

Change-Id: Ic28774a2530bb7b6688a974f2af4a23ec04ef236
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9684
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1987250
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65585}
2020-01-06 12:40:12 +00:00
build_overrides Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
custom_deps Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
docs Add OWNERS for docs/ 2019-05-15 12:06:15 +00:00
gni [heap-profiler] Expose 'globalObjectsAsRoots' via inspector interface 2019-12-18 10:18:58 +00:00
include [unwinder] Add a new API based on code pages for arm32 support 2019-12-19 12:59:35 +00:00
infra [test] Bump shards for slow steps 2020-01-02 10:54:44 +00:00
samples [cleanup] Drop some occurrences of Isolate::Current 2019-06-26 19:39:21 +00:00
src Revert "Reland "[TurboFan] Don't serialize read-only heap objects"" 2020-01-06 12:40:12 +00:00
test [protectors] Remove invalid DCHECK in protectors. 2020-01-02 15:49:54 +00:00
testing Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
third_party [DevTools] Roll inspector_protocol (V8) 2019-12-19 00:15:48 +00:00
tools Fix presubmit copyright regex to allow the year 2020 2020-01-05 16:07:52 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.flake8 Add .flake8 to allow for python style checking. 2019-07-19 21:44:03 +00:00
.git-blame-ignore-revs Add recent code rewrite to .git-blame-ignore-revs 2019-05-23 10:38:45 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Add .clangd to .gitignore 2019-12-01 11:39:11 +00:00
.gn [build] Dynamically decide if to use system xcode 2019-07-29 08:20:24 +00:00
.vpython [tools] Implement confidence-based number of runs 2019-05-09 09:42:28 +00:00
.ycm_extra_conf.py Fix ycm config for headers without source 2019-12-09 11:59:21 +00:00
AUTHORS [builtins] Port Number.prototype.toString to Torque 2019-11-05 11:00:26 +00:00
BUILD.gn [promises] Port Promise.race to Torque. 2019-12-27 15:29:17 +00:00
CODE_OF_CONDUCT.md Explicitly state that the Chromium Code of Conduct also applies to V8 2016-03-02 09:51:24 +00:00
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
COMMON_OWNERS Remove mstarzinger@ from OWNERS files. 2019-12-13 11:13:14 +00:00
DEPS Update V8 DEPS. 2020-01-05 13:02:31 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
INFRA_OWNERS Remove myself from owners 2019-12-12 14:22:32 +00:00
INTL_OWNERS Add missing owners files 2019-05-31 07:21:01 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.v8 Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.valgrind Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
MIPS_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
OWNERS Add syg@chromium.org as DEPS owner for test262 rolls 2019-09-17 19:29:11 +00:00
PPC_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
PRESUBMIT.py Remove and update some outdated TODO(mstarzinger). 2019-12-13 10:18:04 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
S390_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
WATCHLISTS Remove 'profiler' category from WATCHLISTS 2019-10-21 08:23:59 +00:00

README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://v8.dev/docs

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*

Contributing

Please follow the instructions mentioned at v8.dev/docs/contribute.