AuroraMiddleware/v8
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mlippautz 55422bdd50 [heap] Use HashMap as scratchpad backing store 
We use a scratchpad to remember visited allocation sites for post processing
(making tenure decisions). The previous implementation used a rooted FixedArray
with constant length (256) to remember all sites. Updating the scratchpad is a
bottleneck in any parallel/concurrent implementation of newspace evacuation.

The new implementation uses a HashMap with allocation sites as keys and
temporary counts as values. During evacuation we collect a local hashmap of
visited allocation sites. Upon merging the local hashmap back into a global one
we update potential forward pointers of compacted allocation sites.  The
scavenger can directly enter its entries into the global hashmap. Note that the
actual memento found count is still kept on the AllocationSite as it needs to
survive scavenges and full GCs.

BUG=chromium:524425
LOG=N
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1535723002

Cr-Commit-Position: refs/heads/master@{#33233}
2016-01-12 11:46:37 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build Stop disabling compiler warning 4481, v8 edition. 2016-01-08 15:21:56 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
include Add Add ExternalStringResourceBase::IsCompressible 2016-01-12 06:28:57 +00:00
infra Revert of [CQ] Temporarily switch off pure swarming bots. (patchset #1 id:1 of https://codereview.chromium.org/1502143005/ ) 2015-12-09 07:43:41 +00:00
samples Disable soon to be deprecated APIs per default for v8 2015-12-09 10:35:04 +00:00
src [heap] Use HashMap as scratchpad backing store 2016-01-12 11:46:37 +00:00
test [builtins] Refactor the remaining Date builtins. 2016-01-12 10:48:26 +00:00
testing Converted V8 CQ config to proto-format 2015-05-28 15:02:53 +00:00
third_party/binutils Update binutils version. 2015-08-07 08:09:49 +00:00
tools [heap] Use HashMap as scratchpad backing store 2016-01-12 11:46:37 +00:00
.clang-format Change clang-format config to allow for two empty lines between functions 2013-12-03 10:39:21 +00:00
.gitignore Update DEPS entry for tracing to point at correct location 2015-12-16 12:17:06 +00:00
.ycm_extra_conf.py [ycm] The YouCompleteMe configuration is not VIM specific. 2015-02-12 07:21:13 +00:00
AUTHORS Add Isolate::DiscardThreadSpecificMetadata method to embedder API. 2015-12-16 15:49:49 +00:00
BUILD.gn [builtins] Refactor the remaining Date builtins. 2016-01-12 10:48:26 +00:00
ChangeLog Update change log to match roll branch. 2015-05-18 15:03:50 +00:00
codereview.settings Use v8-reviews@ for review mail, so v8-dev@ is free for dev discussions 2015-09-09 08:14:11 +00:00
DEPS Update V8 DEPS. 2016-01-09 04:22:31 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +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 wasm compile time option and enable wasm behind a runtime flag. 2016-01-05 18:06:54 +00:00
Makefile.android Reland [android] Migrate more configs to gyp. 2015-06-26 12:04:09 +00:00
Makefile.nacl Use the pnacl-clang toolchain for (P)NaCL builds 2014-10-06 08:10:50 +00:00
OWNERS Update OWNERS file. 2015-07-16 11:37:51 +00:00
PRESUBMIT.py [CQ] Add new triggered win trybots to CQ. 2015-12-03 15:01:06 +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 Map arm64 and mips64el -> x64 for mksnapshot 2015-12-16 15:17:37 +00:00
WATCHLISTS [Release] CC hpayer@ and ulan@ to every heap change 2015-12-02 12:49:50 +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.