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Shu-yu Guo c6c2629998 Revert "heap: Use generic flags for main-thread only flags" 
This reverts commit 2a8e2a9b98.

Reason for revert: Linking error on UBSan https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Clusterfuzz%20Linux64%20UBSan%20-%20release%20builder/17755/overview

Original change's description:
> heap: Use generic flags for main-thread only flags
>
> BasicMemoryChunk flags should only be mutated from the main thread
> when no concurrent task can access them. For that purpose it is enough
> to use regular non-atomic flags as they are immutable while the GC is
> running.
>
> Change-Id: I0a9f8ecb2eb2aafaf17e77626ae27604abd1b618
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3107230
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76471}

Change-Id: I5da7dff91549fd4aadd0bc9ae0a29c52748d9dcb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3116810
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Owners-Override: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76472}
2021-08-24 21:33:14 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
bazel [bazel] Initial support to mjsunit tests 2021-08-09 14:12:02 +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 [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
include Make autoroll account owner of auto-updated file 2021-08-24 15:05:13 +00:00
infra [infra] Add NumFuzz CI builders with infra staging flags 2021-08-24 11:46:14 +00:00
samples Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
src Revert "heap: Use generic flags for main-thread only flags" 2021-08-24 21:33:14 +00:00
test Revert "[cleanup] Remove harmony-intl-dateformat-day-period" 2021-08-24 21:12:30 +00:00
testing [macros] Upstream Google3 changes 2021-06-24 16:36:14 +00:00
third_party Roll inspector-protocol to 32cf5f2bf4dc20c73ead291e68d2e2f6b638cd57 2021-07-09 13:01:24 +00:00
tools Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
.bazelrc [bazel] Support build mode compilation 2021-07-13 10:14:16 +00:00
.clang-format
.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 remove swarming_client 2021-08-24 10:39:33 +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 remove swarming_client 2021-08-24 10:39:33 +00:00
.gn Revert "[build] Separate out inspector as a shared library" 2021-07-02 16:15:20 +00:00
.mailmap Restore consistency between .mailmap and AUTHORS 2021-06-24 08:58:04 +00:00
.vpython [tools] Implement confidence-based number of runs 2019-05-09 09:42:28 +00:00
.ycm_extra_conf.py [ycm] Fix python script 2021-07-29 09:48:32 +00:00
AUTHORS [date] Fix Date#getMinutes() test failures 2021-08-18 14:54:40 +00:00
BUILD.bazel cppgc-js: Allow custom OOM handling and redirect to V8 handler 2021-08-24 20:21:28 +00:00
BUILD.gn cppgc-js: Allow custom OOM handling and redirect to V8 handler 2021-08-24 20:21:28 +00:00
CODE_OF_CONDUCT.md
codereview.settings
COMMON_OWNERS Remove solanes@ from OWNER files 2021-08-20 17:16:02 +00:00
DEPS remove swarming_client 2021-08-24 10:39:33 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Remove rmcilroy from OWNERS. 2021-08-19 16:30:27 +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
LICENSE.strongtalk
LICENSE.v8
LOONG_OWNERS [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
MIPS_OWNERS [mips] Request to be an owner of MIPS files 2020-11-23 09:43:49 +00:00
OWNERS Make autoroll account owner of auto-updated file 2021-08-24 15:05:13 +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 Remove rmcilroy from OWNERS. 2021-08-19 16:30:27 +00:00
WORKSPACE [bazel] Adds ICU 2021-06-30 12:54:15 +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.