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Deepti Gandluri 365b637cc0 Reland "[wasm] Lazy update instances on a shared Memory.Grow" 
This is a reland of 80f06d6fb3

Original change's description:
> [wasm] Lazy update instances on a shared Memory.Grow
> 
>  - Introduce a GROW_SHARED_MEMORY interrupt, and handler
>  - Memory objects for isolates are updated on a stack check, add
>    tracking for isolates that hit the stack check
>  - When enough memory is not reserved ahead of time, fail to grow
>  - Add tracking for externalized buffers in the MemoryTracker so
>    that the MemoryTracker will know when backing_stores can be freed.
>  - For shared buffer, do not always allocate a new buffer when
>    growing an externalized buffer
> 
> 
> Change-Id: I9cf1be19f2f165fa6ea4096869f7d6365304c8c4
> Bug: v8:8564
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1472430
> Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
> Reviewed-by: Ben Smith <binji@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#60064}

Bug: v8:8564
Change-Id: Id0cf8e42a9d54ac702dba351e248a1b92713c98a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1506357
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60071}
2019-03-06 18:41:19 +00:00
benchmarks [test] Ensure random generator in JSTests does not use float arithmetic 2018-12-17 10:05:08 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
custom_deps [build] Add common directory for custom deps 2018-06-08 19:23:02 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni unified-heap: Add GN flag for full heap snapshots 2019-03-06 09:39:22 +00:00
include [ptr-compr][x64] Define kTaggedSize as kInt32Size 2019-03-06 12:27:39 +00:00
infra [build] Switch off goma on gcc trybots 2019-03-01 13:34:05 +00:00
samples Add a sample that uses the JS API to create wasm 2018-06-07 23:43:38 +00:00
src Reland "[wasm] Lazy update instances on a shared Memory.Grow" 2019-03-06 18:41:19 +00:00
test Reland "[wasm] Lazy update instances on a shared Memory.Grow" 2019-03-06 18:41:19 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party [DevTools] Roll of inspector protocol ... 2019-03-01 02:10:29 +00:00
tools Fix heap_find gdb macro 2019-03-06 11:48:12 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Add .ccls-cache to .gitignore 2019-02-26 10:32:45 +00:00
.gn [test] Remove obsolete test262 archive extract 2018-03-28 13:52:15 +00:00
.vpython [tools] Correctly identify and report test crashes and infra failures 2018-10-30 15:05:40 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS [coverage] Extend SourceRangeAstVisitor for throw statements 2019-02-28 10:45:29 +00:00
BUILD.gn [typedarray] Port TypedArray#filter to Torque. 2019-03-05 15:15:40 +00:00
ChangeLog [release] Merge ChangeLog back to master 2018-12-07 15:41:59 +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 Revert "Update V8 DEPS." 2019-03-06 11:45:15 +00:00
LICENSE Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk
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
OWNERS Reduce wasm OWNERS to current team members 2018-10-15 14:47:49 +00:00
PRESUBMIT.py Revert "[torque] Temporarily disable torque format check to pass presubmit" 2019-02-20 14:07:17 +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 Reland "Add Windows ARM64 ABI support to V8" 2018-10-24 19:46:36 +00:00
WATCHLISTS Update WATCHLIST wrt yangguo 2018-11-23 08:29:12 +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.