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Ali Ijaz Sheikh 203e5916f1 [heap] make allocation_step_in_progress_ a heap property 
Don't start new steps recursively if a step is already in progress.
Having this property on a space is not sufficient, as an allocation
is a global (heap-wide) event. Computing the next step size, for example
is a property of all observers in existence rather than the spaces in
existence.

In this case a failure was due to the fact that we attempted to compute
the next step size while a given observer was mid-way through its step
triggered from a different space. bytes_to_next_step_ was partially
updated at that point.

BUG=v8:7313

Change-Id: Iaf632fce2cfd5ed49b0f41a69c3694e505e17d81
Reviewed-on: https://chromium-review.googlesource.com/887174
Commit-Queue: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50909}
2018-01-26 17:22:55 +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] do not hide symbols for monolithic build. 2018-01-05 16:11:55 +00:00
gypfiles Revert "[builtins] Add .incbin cctest" 2018-01-26 10:37:31 +00:00
include [modules] Various minor cleanups. 2018-01-25 09:23:48 +00:00
infra [build] Add win64 asan MB configs 2018-01-26 09:58:49 +00:00
samples [gyp] move gyp files from src to gypfiles. 2018-01-23 09:54:36 +00:00
src [heap] make allocation_step_in_progress_ a heap property 2018-01-26 17:22:55 +00:00
test [arm64] Do not use literal pool for non-relocatable constants. 2018-01-26 16:13:33 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Update third_party/binutils version to match Chromium. 2017-12-08 07:28:26 +00:00
tools [object-stats] Visualizer: Allow filtering categories by used memory 2018-01-26 16:33:24 +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 [test] Remove promises-aplus test suite 2017-12-19 09:29:26 +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 Revert "Reland: Reimplement Object.entries/values as CSA to optimize performance." 2018-01-22 09:47:43 +00:00
BUILD.gn [compile] Remove AST numbering 2018-01-24 17:15:55 +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. 2018-01-26 05:36:29 +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 [Makefile] Move tags generation to standalone Makefile 2018-01-26 12:03:32 +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 [gyp] move gyp files from src to gypfiles. 2018-01-23 09:54:36 +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.