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Clemens Hammacher b53141eca3 Reland "[wasm] Don't store global handles in the interpreter" 
This is a reland of 5648aad553.
Previous compile error should be fixed by disabling strict aliasing
assumptions on gyp: https://chromium-review.googlesource.com/c/571806

Original change's description:
> [wasm] Don't store global handles in the interpreter
> 
> Storing global handles in the interpreter is dangerous, because the
> global handles are strong roots into the heap. The interpreter itself is
> referenced from the heap via a Managed. Hence the interpreter keeps the
> instance alive, while the instance keeps the Managed alive. So the GC
> will never collect them.
> 
> This CL refactors this to only store the handle to the instance object
> while executing in the interpreter, and clearing it when returning.
> It also removes the cache of import wrappers, as it should not be
> performance critical, but keeps lots of objects alive. If it turns out
> to be performance critical, we will have to reintroduce such a cache
> stored in the WasmDebugInfo object.
> 
> R=titzer@chromium.org
> CC=ahaas@chromium.org
> 
> Bug: chromium:610330
> Change-Id: I54b489dadc16685887c0c1a98da6fd0df5ad7cbb
> Reviewed-on: https://chromium-review.googlesource.com/567058
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46629}

TBR=titzer@chromium.org

Bug: chromium:610330
Change-Id: Ic7836b1b1a044a89f2138f0c76f92acd3a1b2f2b
Reviewed-on: https://chromium-review.googlesource.com/570578
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46679}
2017-07-14 14:37:22 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides Remove build_overrides/v8.gni. 2017-01-26 20:18:58 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [build] Dump build configuration for all v8 executables 2017-06-29 08:06:45 +00:00
gypfiles Disable strict-aliasing for gyp 2017-07-14 13:16:52 +00:00
include Remove padding instance types. 2017-07-13 14:48:56 +00:00
infra Revert "[CQ] Temporarily exclude broken bot from CQ" 2017-07-13 07:30:26 +00:00
samples Reland of land "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2396933002/ ) 2016-10-07 07:56:52 +00:00
src Reland "[wasm] Don't store global handles in the interpreter" 2017-07-14 14:37:22 +00:00
test Reland "[wasm] Don't store global handles in the interpreter" 2017-07-14 14:37:22 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Remove myself from non-toplevel owners files 2017-06-28 10:00:48 +00:00
tools [release] Improve error message for merge_to_release.py 2017-07-14 07:56:10 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore [wasm] Remove the wasm-asmjs fuzzer 2017-06-21 10:59:35 +00:00
.gn For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64(both LE and BE). 2017-05-12 01:35:09 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS [build] Set MSVS .obj folders in gyp for v8_base 2017-06-30 12:40:19 +00:00
BUILD.gn [turbofan] Remove dead tail call optimization support. 2017-07-14 11:21:41 +00:00
ChangeLog [Release] Update ChangeLog file 2016-02-17 21:29:09 +00:00
CODE_OF_CONDUCT.md Explicitly state that the Chromium Code of Conduct also applies to V8 2016-03-02 09:51:24 +00:00
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2017-07-14 03:43:56 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +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 [build] Life support for top-level Makefile. 2017-06-07 13:10:40 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Add COMPONENT tags to OWNERS files where appropriate 2017-05-22 10:15:28 +00:00
PRESUBMIT.py [test] Automatically add a noi18n bot for changes affecting Intl 2017-06-06 13:01:14 +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 MIPS[64]: Add support for big endian build using GN 2017-06-02 15:02:18 +00:00
WATCHLISTS [V8Tracing] Add lpy@ and fmeawad@ into watchlist for tracing/. 2017-05-22 19:40:17 +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.