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Adam Klein 3916401e4b Revert "[builtins] Mega-revert to address the Dev blocker in crbug.com/808911." 
This reverts commit 14108f4c2e.

Reason for revert: Not the culprit for Canary microtask crashes

Original change's description:
> [builtins] Mega-revert to address the Dev blocker in crbug.com/808911.
> 
> - Revert "[builtins] Save one word in contexts for Promise.all."
>   This reverts commit 7632da067b.
> - Revert "[builtins] Also use the Promise#then protector for Promise#finally()."
>   This reverts commit d4f072ced3.
> - Revert "[builtins] Don't mess with entered context for MicrotaskCallbacks."
>   This reverts commit 6703dacdd6.
> - Revert "[debugger] Properly deal with settled promises in catch prediction."
>   This reverts commit 40dd065823.
> - Revert "[builtins] Widen the fast-path for Promise builtins."
>   This reverts commit db0556b7e8.
> - Revert "[builtins] Unify PerformPromiseThen and optimize it with TurboFan."
>   This reverts commit a582199c5e.
> - Revert "[builtins] Remove obsolete PromiseBuiltinsAssembler::AppendPromiseCallback."
>   This reverts commit 6bf8885290.
> - Revert "[builtins] Turn NewPromiseCapability into a proper builtin."
>   This reverts commit 313b490ddd.
> - Revert "[builtins] Inline InternalPromiseThen into it's only caller"
>   This reverts commit f7bd6a2fd6.
> - Revert "[builtins] Implement Promise#catch by really calling into Promise#then."
>   This reverts commit b23b098fa0.
> - Revert "[promise] Remove incorrect fast path"
>   This reverts commit 0f6eafe855.
> - Revert "[builtins] Squeeze JSPromise::result and JSPromise::reactions into a single field."
>   This reverts commit 8a677a2831.
> - Revert "[builtins] Refactor promises to reduce GC overhead."
>   This reverts commit 8e7737cb58.
> 
> Tbr: hpayer@chromium.org
> Bug: chromium:800651, chromium:808911, v8:5691, v8:7253
> Change-Id: I8c8ea5ed32ed62f6cd8b0d027a3707ddd891e5f1
> Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
> Reviewed-on: https://chromium-review.googlesource.com/906991
> Commit-Queue: Yang Guo <yangguo@chromium.org>
> Commit-Queue: Adam Klein <adamk@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51158}

Change-Id: I09d958cbebd635a325809072a290f2f53df8c5d4
Tbr: adamk@chromium.org,yangguo@chromium.org,bmeurer@chromium.org
Bug: chromium:800651, chromium:808911, v8:5691, v8:7253
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/908988
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51181}
2018-02-08 17:25:13 +00:00
benchmarks Fix common misspellings 2017-08-02 09:35:28 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [GN][MIPS] Add ldso_path and gcc_target_rpath config on MIPS 2018-01-30 11:51:24 +00:00
gypfiles [builtins] Remove .incbin test 2018-02-07 15:47:37 +00:00
include Revert "[builtins] Mega-revert to address the Dev blocker in crbug.com/808911." 2018-02-08 17:25:13 +00:00
infra [build] Remove remaining gyp builders from MB configs 2018-02-08 14:25:52 +00:00
samples [gyp] move gyp files from src to gypfiles. 2018-01-23 09:54:36 +00:00
src Revert "[builtins] Mega-revert to address the Dev blocker in crbug.com/808911." 2018-02-08 17:25:13 +00:00
test Revert "[builtins] Mega-revert to address the Dev blocker in crbug.com/808911." 2018-02-08 17:25:13 +00:00
testing [gyp] move build targets for tests to gypfiles. 2018-01-30 06:31:00 +00:00
third_party Move detect_v8_host_arch out of gypfiles. 2018-01-31 08:21:01 +00:00
tools Revert "[builtins] Mega-revert to address the Dev blocker in crbug.com/808911." 2018-02-08 17:25:13 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitignore [build] Enable downloading mips toolchain via runhooks 2018-01-31 14:38:43 +00:00
.gn For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64(both LE and BE). 2017-05-12 01:35:09 +00:00
.vpython Add a comment for the VPython dep 2017-10-25 12:23:35 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS Reland: Reimplement Object.entries/values as CSA to optimize performance. 2018-02-08 10:12:32 +00:00
BUILD.gn [typedarray] Share SpeciesCreateByLength between CSA code. 2018-02-07 11:26:56 +00:00
ChangeLog [tools] Merge ChangeLog from latest release 2017-12-19 12:30:56 +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
DEPS Update V8 DEPS. 2018-02-08 05:02:16 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +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
Makefile [gyp] move build targets for tests to gypfiles. 2018-01-30 06:31:00 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Update top-level OWNERS. 2018-01-19 08:37:12 +00:00
PRESUBMIT.py [presubmit] Add include guard check 2018-02-02 16:59:32 +00:00
README.md [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
snapshot_toolchain.gni MIPS[64]: Generate snapshots on MIPS big-endian targets 2017-11-24 19:00:32 +00:00
WATCHLISTS Add adamk to a few WATCHLISTS 2017-11-10 21:38:29 +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://github.com/v8/v8/wiki

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 on the V8 wiki.