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Santiago Aboy Solanes 94bf147cac Revert "Reland "[compiler] Perform MapRef's SupportsFastArray methods concurrently"" 
This reverts commit fd16e67e49.

Reason for revert: TSAN no-CM flaky failures https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20no-concurrent-marking/3413

Original change's description:
> Reland "[compiler] Perform MapRef's SupportsFastArray methods concurrently"
>
> This is a reland of ebd9dcdaac
>
> Reason for reland: std::atomic<> only works for primitive types i.e. it
> does not work for Object. We can change it to read/write the Object's
> Address, instead.
>
> Original (reverted) CL can be seen in PS1.
>
> Original change's description:
> > [compiler] Perform MapRef's SupportsFastArray methods concurrently
> >
> > We are safe to go through the native_contexts_list_ since we do it
> > through IsAnyInitialArrayPrototype which disallows the GC. Furthermore,
> > we read that list with an acquire load which guarantees that the fields
> > have been initialized.
> >
> > Bug: v8:7790
> > Change-Id: I778d51f4ead44e472f842693a7e9ff577d6acfe3
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2826541
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Reviewed-by: Georg Neis <neis@chromium.org>
> > Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#74086}
>
> Bug: v8:7790
> Change-Id: I721c3a1e962951b0bc073dc74baf7fbeababc243
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2843813
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74104}

Bug: v8:7790
Change-Id: I4efa8165b680eaa6c5c525d85d21962e6a5b1abb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2843822
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74106}
2021-04-21 15:42:51 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
build_overrides [build] Remove obsolete gn flag 2021-01-11 15:50:59 +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 Make Google benchmark dependency a default 2021-04-21 12:19:40 +00:00
include Expose V8CommandLineAPIScope and V8InspectorSession::createCommandLineAPI 2021-04-21 11:55:25 +00:00
infra Make Google benchmark dependency a default 2021-04-21 12:19:40 +00:00
samples Reland "[api] Add v8::Isolate::ThrowError helper" 2021-04-16 11:48:05 +00:00
src Revert "Reland "[compiler] Perform MapRef's SupportsFastArray methods concurrently"" 2021-04-21 15:42:51 +00:00
test [test] Fix null dererefence in d8.test.FastCAPI 2021-04-21 13:53:51 +00:00
testing build: Remove no-op calls to set_sources_assignment_filter 2020-10-08 14:44:01 +00:00
third_party Make Google benchmark dependency a default 2021-04-21 12:19:40 +00:00
tools [tools] Profiler builtins and sparkplug fixes 2021-04-21 11:44:31 +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 [infra] Update .git-blame-ignore-revs 2020-03-03 12:59:13 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore [build] Remove legacy binutils 2021-01-08 12:33:31 +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 Reland "[api] JSFunction PromiseHook for v8::Context" 2021-04-20 14:49:46 +00:00
BUILD.gn [flags] Make --debug-code a build-time flag 2021-04-21 11:54:20 +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 petermarshall from OWNERS 2021-03-31 11:00:22 +00:00
DEPS Make Google benchmark dependency a default 2021-04-21 12:19:40 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Update ENG_REVIEW_OWNERS 2021-02-25 14:28:32 +00:00
INFRA_OWNERS Add team members as owners 2020-08-18 08:29:04 +00:00
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +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
MIPS_OWNERS [mips] Request to be an owner of MIPS files 2020-11-23 09:43:49 +00:00
OWNERS Add RISC-V backend 2021-02-09 17:06:36 +00:00
PPC_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
PRESUBMIT.py [bigint] Move multiplication to src/bigint/ 2021-04-19 15:40:43 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
RISCV_OWNERS [riscv64] Change one of the owners for RISCV. 2021-04-20 14:39:26 +00:00
S390_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
WATCHLISTS Add a watchlist for ieee754.(cc|h) changes. 2021-01-11 18:10:19 +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.