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Ulan Degenbaev 250ba28a57 [heap, deserializer] Restore marking invariant for deserialized maps 
when black allocation is on.

The scenario:
1) Incremental marking is off.
2) Partial deserialization starts and calls Heap::ReserveSpace.
2) ReserveSpace creates (white) reservations in old space.
3) ReserveSpace allocates map placeholders. One of these allocations
starts incremental marking, which starts black allocation (currently
when concurrent marking is on). Subsequent maps are black allocated.
4) ReserveSpace succeeds without triggering a GC.
5) Deserialization continues. Some maps are black. Note that
deserialization emits only old->new write barriers and skips
marking write barriers.
6) Deserialization finishes and re-visits the black allocated
reservations and large object. This misses black allocated maps.
7) There is black->white descriptor array pointer in one of these map.

BUG=chromium:723600

Change-Id: Ifffe46f22a7d7dbc5cff2e882190234fcc722ccb
Reviewed-on: https://chromium-review.googlesource.com/581187
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46816}
2017-07-21 10:36:57 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides Remove build_override for macOS min SDK and deployment target. 2017-07-14 18:24:44 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [build] Dump build configuration for all v8 executables 2017-06-29 08:06:45 +00:00
gypfiles Remove x87 port 2017-07-18 18:20:40 +00:00
include Update version to 6.2 2017-07-20 12:21:52 +00:00
infra Don't disable the sysroot on GCC 2017-07-19 08:48:13 +00:00
samples Reland of land "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2396933002/ ) 2016-10-07 07:56:52 +00:00
src [heap, deserializer] Restore marking invariant for deserialized maps 2017-07-21 10:36:57 +00:00
test [Compiler] Remove SharedFunctionInfo from ParseInfo. 2017-07-21 10:02:47 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Remove myself from non-toplevel owners files 2017-06-28 10:00:48 +00:00
tools Remove PREPARED_SCOPE_DATA instance type. 2017-07-21 07:19:39 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore [wasm] Remove the wasm-asmjs fuzzer 2017-06-21 10:59:35 +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
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS [build] Set MSVS .obj folders in gyp for v8_base 2017-06-30 12:40:19 +00:00
BUILD.gn Rename src/float.h to src/boxed-float.h 2017-07-20 12:48:52 +00:00
ChangeLog [Release] Update ChangeLog file 2016-02-17 21:29:09 +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. 2017-07-21 03:25:58 +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 Remove x87 port 2017-07-18 18:20:40 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Add COMPONENT tags to OWNERS files where appropriate 2017-05-22 10:15:28 +00:00
PRESUBMIT.py [test] Automatically add a noi18n bot for changes affecting Intl 2017-06-06 13:01:14 +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]: Add support for big endian build using GN 2017-06-02 15:02:18 +00:00
WATCHLISTS [V8Tracing] Add lpy@ and fmeawad@ into watchlist for tracing/. 2017-05-22 19:40:17 +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.