| commit | 12779b16b0707bf73404962591b36523048c8c0e | [log] [tgz] |
|---|---|---|
| author | Ulan Degenbaev <ulan@chromium.org> | Fri Dec 08 15:18:25 2017 |
| committer | Commit Bot <commit-bot@chromium.org> | Fri Dec 08 17:38:31 2017 |
| tree | dcee8e08748c4aef3d9931ee09b9dbe1e9e0c991 | |
| parent | bbf43d8488bb3d5b5a5d5189c41fc58bd5f729e6 [diff] |
[heap] Use unchecked length getter for concurrent marking of FixedArray. If the fixed array is being concurrently left-trimmed then checked getter can assert because the length is not necessarily a Smi. This patch uses unchecked length getter to cache the length as Object*. Only if the marker manages to color the array black, we are guaranteed that the cached length is a Smi. This patch also uses unchecked cast for FixedArray in HeapVisitor for concurrent marker. Note that this patch only affects debug mode. Bug: chromium:694255 Change-Id: I5016a2234a9f5fb98b498e06f5d1428b3f1cc3c6 Reviewed-on: https://chromium-review.googlesource.com/817554 Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#49970}
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
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/*
Please follow the instructions mentioned on the V8 wiki.