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Leszek Swirski 5dee5ade75 [sfi] Remove SFI function literal id field (reland^2) 
SharedFunctionInfos store their original function literal's id. This is
also their index in the Script's SFI list.

The function literal id is only needed for lazy compilation and live edit,
and access only has to be fast in the former. So, we can move the SFI
function literal id field to UncompiledData, and if patching with live
edit, or discarding compiled code, we can perform a slower linear search
through the Script's SFI list.

This is a reland of
 1) https://chromium-review.googlesource.com/1082480 and
 2) https://chromium-review.googlesource.com/1128854
the differences being:
 1) caching the literal id on UncompiledData rather than always linearly
    searching the SFI list, and removing the unused runtime-liveedit.cc
    file instead of fixing it to support this change.
 2) clearing padding on UncompiledData now that it has 3 int32 fields,
    making its end unaligned on x64.

TBR=yangguo@chromium.org,marja@chromium.org,ulan@chromium.org,cbruni@chromium.org

Bug: chromium:818642
Change-Id: I58dcb12a2a60a680f662568da428e01189c62638
Reviewed-on: https://chromium-review.googlesource.com/1138325
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54473}
2018-07-16 16:38:28 +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
custom_deps [build] Add common directory for custom deps 2018-06-08 19:23:02 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni Disable multi_snapshots by default 2018-06-28 10:02:12 +00:00
include [explicit isolates] Remove nearly all GetIsolates in api.cc 2018-07-16 14:33:24 +00:00
infra fix gn builds on aix 2018-07-12 07:28:36 +00:00
samples Add a sample that uses the JS API to create wasm 2018-06-07 23:43:38 +00:00
src [sfi] Remove SFI function literal id field (reland^2) 2018-07-16 16:38:28 +00:00
test [sfi] Remove SFI function literal id field (reland^2) 2018-07-16 16:38:28 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party fix gn builds on aix 2018-07-12 07:28:36 +00:00
tools [tools] Improve function event logging and parse processor 2018-07-16 14:05:14 +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
.gitattributes Disable line ending modifications by git in .png files 2018-06-27 15:39:07 +00:00
.gitignore [turbolizer] Change turbolizer to ES2015 modules 2018-07-11 07:19:47 +00:00
.gn [test] Remove obsolete test262 archive extract 2018-03-28 13:52:15 +00:00
.vpython [tools] Add pypiwin32 pacakge to VPython config 2018-03-09 20:33:36 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS [asmjs] Fix parsing hex numeric literals ending with 'e'. 2018-07-02 11:52:18 +00:00
BUILD.gn Factor out {CodeTracer} into a separate header file. 2018-07-16 08:24:40 +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. 2018-07-16 03:54:24 +00:00
LICENSE Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +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
OWNERS Updating top-level OWNERS. 2018-07-05 15:18:24 +00:00
PRESUBMIT.py Add autoroller task account into bot whitelist for author check 2018-06-06 14:40:09 +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 Remove v8-x87-ports@ from WATCHLIST 2018-02-26 19:56:21 +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.