55d00c95b0
The tracker needs to maintain the byte length as there is no order guarantee when sweeping pages and the byte length may be a HeapNumber that is stored on a different page. The abstraction for ArrayBuffers is left untouched. We distinguish between the following cases: 1. Regular AB (backing_store and bye_length should be used) 2. AB allocated using kReservation but not part of wasm 3. AB allocated using kReservation and part of wasm In practice, 2. does not exist, but we still maintain "allocation_base" and "allocation_length" which fall back to backing_store and byte_length in this case. The problematic part is that they look like innocent getters on the object but actually refer to different data structures or on-heap objects. Since 2. does not exist, and 3. looks up the bounds in its own tracker, it is fine for ArrayBufferTracker to pass backing_store and tracked byte_length. Bug: v8:7701 Change-Id: Ib89d5fe94fce5cef8e5d8343a5415a3b9ad0deba Reviewed-on: https://chromium-review.googlesource.com/1039385 Reviewed-by: Ben Titzer <titzer@chromium.org> Reviewed-by: Hannes Payer <hpayer@chromium.org> Commit-Queue: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#52923} |
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benchmarks | ||
build_overrides | ||
docs | ||
gni | ||
include | ||
infra | ||
samples | ||
src | ||
test | ||
testing | ||
third_party | ||
tools | ||
.clang-format | ||
.editorconfig | ||
.git-blame-ignore-revs | ||
.gitignore | ||
.gn | ||
.vpython | ||
.ycm_extra_conf.py | ||
AUTHORS | ||
BUILD.gn | ||
ChangeLog | ||
CODE_OF_CONDUCT.md | ||
codereview.settings | ||
DEPS | ||
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://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.