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Marja Hölttä 33157f3de7 [in-place weak refs] Replace the WeakCell(transition_map) in FeedbackVector. 
- Make FeedbackVector backing store a WeakFixedArray.
- "feedback" is always strong but "extra" might be weak.
- Whenever the handler stored in FeedbackVector is a WeakCell to a transition
  Map, replace it with an in-place weak reference.
For a more detailed description of the changes, see the design doc

https://docs.google.com/document/d/1P8cIme2wKszdYt64ObAiuh6pXgLnrrn80Hpl1ejJbOU/edit#heading=h.ijx1oculrikp

BUG=v8:7308

Change-Id: I72c5cf6597ef24d4c22a1fe8e25b67ca196d4ec8
Reviewed-on: https://chromium-review.googlesource.com/1027855
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53051}
2018-05-08 08:08:26 +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 Revert "Roll third_party/inspector_protocol to 59ca26e" 2018-04-23 17:38:31 +00:00
include Provide API to expose non-empty top source url. 2018-05-07 20:47:19 +00:00
infra [test] Merge test-spec files 2018-05-07 10:49:35 +00:00
samples [sample] fix potential memory leak. 2018-02-21 13:06:18 +00:00
src [in-place weak refs] Replace the WeakCell(transition_map) in FeedbackVector. 2018-05-08 08:08:26 +00:00
test [in-place weak refs] Replace the WeakCell(transition_map) in FeedbackVector. 2018-05-08 08:08:26 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party [torque] move Antlr to separate BUILD.gn file 2018-05-02 11:16:56 +00:00
tools [wasm] Make {WasmExportedFunction} fields easier to reach. 2018-05-07 16:53:09 +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 [git] Add gitattributes to convert CRLF to LF automatically 2018-05-07 18:44:49 +00:00
.gitignore Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +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 Expose "$262.agent.monotonicNow()" for use in testing Atomic operation timeouts. Bug: v8:7705 2018-05-01 15:27:59 +00:00
BUILD.gn [torque] refactor Type to expose the implementation pointer directly 2018-05-08 07:54:26 +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. 2018-05-07 03:30:01 +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 Adding a few more wasm related OWNERS. 2018-03-01 20:19:07 +00:00
PRESUBMIT.py [V8] Add back owners check 2018-04-27 07:43:39 +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.