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Yang Guo 6eb66e1cbd Revert "Remove builtin-function-id in SFI" 
This reverts commit f8a676707d.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/25576

I don't think I've seen MSAN being flaky. Chances are that the change to SFI's object layout indeed left some field uninitialized.

Original change's description:
> Remove builtin-function-id in SFI
> 
> builtin_function_id corresponded to BuiltinFunctionId (a manually maintained list of 'interesting' functionsmainly used during optimization). With this change, we nuke builtin-function-id in favor of builtin-id and 8 bits is freed up in SFI.
> 
> Bug: v8:6993
> Change-Id: Iee9b539475bc6531c9aa65b1904d1402a9ef30db
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1495898
> Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#60017}

TBR=ulan@chromium.org,jgruber@chromium.org,leszeks@chromium.org,bmeurer@chromium.org,duongn@microsoft.com

Change-Id: Ic3964ce182ddbd7ef529ddb8b78b9bdfb1be7887
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6993
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1499500
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60018}
2019-03-04 19:54:05 +00:00
benchmarks [test] Ensure random generator in JSTests does not use float arithmetic 2018-12-17 10:05:08 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
custom_deps [build] Add common directory for custom deps 2018-06-08 19:23:02 +00:00
docs
gni [inspector] Fix js_protocol.pdl build dependency 2019-02-26 23:56:17 +00:00
include [ptr-compr] Prepare for changing kTaggedSize, pt.3 2019-03-04 15:40:02 +00:00
infra [build] Switch off goma on gcc trybots 2019-03-01 13:34:05 +00:00
samples Add a sample that uses the JS API to create wasm 2018-06-07 23:43:38 +00:00
src Revert "Remove builtin-function-id in SFI" 2019-03-04 19:54:05 +00:00
test Move empty elements canonicalization from call sites of 2019-03-04 18:07:52 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party [DevTools] Roll of inspector protocol ... 2019-03-01 02:10:29 +00:00
tools [modules] Make debug-scopes handle synthetic variables 2019-03-04 15:06:02 +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
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Add .ccls-cache to .gitignore 2019-02-26 10:32:45 +00:00
.gn [test] Remove obsolete test262 archive extract 2018-03-28 13:52:15 +00:00
.vpython [tools] Correctly identify and report test crashes and infra failures 2018-10-30 15:05:40 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS [coverage] Extend SourceRangeAstVisitor for throw statements 2019-02-28 10:45:29 +00:00
BUILD.gn Revert "Remove builtin-function-id in SFI" 2019-03-04 19:54:05 +00:00
ChangeLog [release] Merge ChangeLog back to master 2018-12-07 15:41:59 +00:00
CODE_OF_CONDUCT.md
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2019-03-04 03:33:49 +00:00
LICENSE Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +00:00
LICENSE.fdlibm
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
OWNERS Reduce wasm OWNERS to current team members 2018-10-15 14:47:49 +00:00
PRESUBMIT.py Revert "[torque] Temporarily disable torque format check to pass presubmit" 2019-02-20 14:07:17 +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 Reland "Add Windows ARM64 ABI support to V8" 2018-10-24 19:46:36 +00:00
WATCHLISTS Update WATCHLIST wrt yangguo 2018-11-23 08:29:12 +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.