437d710fc5
The invariant is that Map::bit_field2 shouldn't change, and the IsInRetainedMapListBit apparently changes when the map is held weakly from optimized code. This causes TurboFan compilations to change the Map::Hash() result, which in turn causes lookups on the normalized map cache to miss (and maybe other bad consequences). With this change we swap Map::IsInRetainedMapListBit (previously in bit_field2) and Map::HasHiddenPrototypeBit (previously in bit_field3) to address this problem. Bug: chromium:963411, v8:9114, v8:9267 Change-Id: I040a27c37305fa602649750bd93bee40c91fca78 Cq-Include-Trybots: luci.chromium.try:linux-rel,win7-rel Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1619747 Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Auto-Submit: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#61657} |
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benchmarks | ||
build_overrides | ||
custom_deps | ||
docs | ||
gni | ||
include | ||
infra | ||
samples | ||
src | ||
test | ||
testing | ||
third_party | ||
tools | ||
.clang-format | ||
.clang-tidy | ||
.editorconfig | ||
.git-blame-ignore-revs | ||
.gitattributes | ||
.gitignore | ||
.gn | ||
.vpython | ||
.ycm_extra_conf.py | ||
AUTHORS | ||
BUILD.gn | ||
ChangeLog | ||
CODE_OF_CONDUCT.md | ||
codereview.settings | ||
COMMON_OWNERS | ||
DEPS | ||
ENG_REVIEW_OWNERS | ||
INFRA_OWNERS | ||
LICENSE | ||
LICENSE.fdlibm | ||
LICENSE.strongtalk | ||
LICENSE.v8 | ||
LICENSE.valgrind | ||
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://v8.dev/docs
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 at v8.dev/docs/contribute.