This patch ensures that an object returned by AllocateRaw is marked black if black allocation starts during the object allocation. This fixes the following issue: 1) Generated code requests allocation of size N for folded allocation. 2) Runtime gets a free list node at address A of size N+M and sets up a linear allocation area with top = A+N and limit = A+N+M. 3) Runtime invokes the allocation observer that starts incremental marking and start black allocation. The area [A+N, A+N+M) is marked black. 4) Runtime returns a white object at address A as the allocation result. 5) Generated code moves the top pointer to A and does bump pointer allocations of white objects from A to A+N+M. 6) Object allocated new A+N can have the impossible marbit pattern. Bug: chromium:694255 Change-Id: I09ceebc97a510fa5fe4ff20706bc46a99f8b7cf4 Reviewed-on: https://chromium-review.googlesource.com/638338 Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#48005} |
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benchmarks | ||
build_overrides | ||
docs | ||
gni | ||
gypfiles | ||
include | ||
infra | ||
samples | ||
src | ||
test | ||
testing | ||
third_party | ||
tools | ||
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.gitignore | ||
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AUTHORS | ||
BUILD.gn | ||
ChangeLog | ||
CODE_OF_CONDUCT.md | ||
codereview.settings | ||
DEPS | ||
LICENSE | ||
LICENSE.fdlibm | ||
LICENSE.strongtalk | ||
LICENSE.v8 | ||
LICENSE.valgrind | ||
Makefile | ||
Makefile.android | ||
OWNERS | ||
PRESUBMIT.py | ||
README.md | ||
snapshot_toolchain.gni | ||
WATCHLISTS |
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.