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ofrobots e5a9947811 [profiler] Implement POC Sampling Heap Profiler 
This implements a proof-of-concept sampling based heap profiler inspired by
tcmalloc's heap profiler [1] and Go's mprof/memprofile [2].

The basic idea is the sample allocations using a randomized Poisson process. At
any point in time we can cheaply request the set of live sample objects that
should be a representative sample of heap. Samples include stack-traces from the
allocation sites, making this an effective tool for memory leak debugging.

Unlike AllocationTracking, this is intended to be cheap and usable online in
production.

The proof-of-concept is only sampling new-space allocations at this point.
Support for sampling paged space and native allocations is anticipated in the
future.

[1] http://goog-perftools.sourceforge.net/doc/heap_profiler.html
[2] http://blog.golang.org/profiling-go-programs

Review URL: https://codereview.chromium.org/1555553002

Cr-Commit-Position: refs/heads/master@{#33448}
2016-01-21 21:13:44 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build S390: Makefile + Build Toolchain Updates 2016-01-14 17:17:11 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
include [profiler] Implement POC Sampling Heap Profiler 2016-01-21 21:13:44 +00:00
infra [cq] Use more next gen trybots. 2016-01-13 14:05:42 +00:00
samples Disable soon to be deprecated APIs per default for v8 2015-12-09 10:35:04 +00:00
src [profiler] Implement POC Sampling Heap Profiler 2016-01-21 21:13:44 +00:00
test [profiler] Implement POC Sampling Heap Profiler 2016-01-21 21:13:44 +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 [profiler] Implement POC Sampling Heap Profiler 2016-01-21 21:13:44 +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 [profiler] Implement POC Sampling Heap Profiler 2016-01-21 21:13:44 +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. 2016-01-21 04:20:45 +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 S390: Makefile + Build Toolchain Updates 2016-01-14 17:17:11 +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] Automatically use the same bots for git cl try. 2016-01-14 11:15:16 +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 [WATCHLISTS] CC v8-$arch-ports automatically on platform-specific CLs 2016-01-19 09:18:41 +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.