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060d984c94
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jpp 060d984c94 [wasm][asm2wasm] Fixes a bug in 8-bit heap view accesses. 
The bug was caused when validating expressions

X >> 0

for indexing into 8-bit heap views. If X was not an intish, the 'normal'
validation path would fail. That, however, left the type of X registered
in the AsmTyper::node_types_ member.

Later, in the 'lenient' code path for 8-bit views, the entire X >> 0
expression would be validated, which would cause X to be validated
again, at which point AsmTyper::SetTypeOf() would DCHECK because the
supplied node already had a type associated with it.

The fix was to simply FAIL() when X is not an intish. This is safe
because if X is not an intish, then

Validate(>>, !intish, FixNum)

will also fail.

BUG= https://bugs.chromium.org/p/chromium/issues/detail?id=628803
BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
TEST= cctest/asmjs/test-asm-typer.cc
LOG= N

Review-Url: https://codereview.chromium.org/2181723002
Cr-Commit-Position: refs/heads/master@{#38053}
2016-07-26 14:05:05 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides [gn] Switch mac to gn 2016-07-25 11:38:07 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni Revert "Enable v8 backtrace support in all debug builds" 2016-07-22 18:15:40 +00:00
gypfiles Revert of MIPS: Fix '[turbofan] Prevent storing signalling NaNs into holey double arrays.' (patchset #2 id:20001 of https://codereview.chromium.org/2171303002/ ) 2016-07-26 06:32:18 +00:00
include [debugger] remove deprecated api functions. 2016-07-20 08:52:18 +00:00
infra [gn] Switch mac to gn 2016-07-25 11:38:07 +00:00
samples Provide a convenience array buffer allocator 2016-06-29 07:42:40 +00:00
src [wasm][asm2wasm] Fixes a bug in 8-bit heap view accesses. 2016-07-26 14:05:05 +00:00
test [wasm][asm2wasm] Fixes a bug in 8-bit heap view accesses. 2016-07-26 14:05:05 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party/binutils Update binutils version to match Chromium. 2016-07-08 07:03:29 +00:00
tools [turbolizer] Remember the last phase, search query, and pane expansions. 2016-07-26 11:47:24 +00:00
.clang-format [formatting] Remove the formatting requirement for 2 empty lines between declarations. 2016-01-25 09:50:17 +00:00
.gitignore [test262] Use standalone Test262 harness project 2016-07-22 15:25:32 +00:00
.gn [gn] Use one source of truth for test source files. 2016-06-28 13:24:08 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS Updating the code example in FunctionTemplate class documentation 2016-07-14 06:34:26 +00:00
BUILD.gn [gn] Set reasonable defaults for debugging 2016-07-26 12:01:39 +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 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. 2016-07-26 03:27:00 +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 [test] Remove presubmit logic from test runner. 2016-06-30 14:30:43 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
Makefile.nacl [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
OWNERS Adding some wasm committers to top level OWNERS. 2016-06-28 16:28:06 +00:00
PRESUBMIT.py Enable check for non-gender neutral pronouns 2016-06-23 07:15:18 +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 Attempt #4 to land "Fix double-building of v8 in GN builds." 2016-07-25 09:30:17 +00:00
WATCHLISTS Remove myself from v8 WATCHLISTS 2016-07-04 14:45:04 +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.