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franzih 399f36b518 [runtime] Allocate space for computed property names. 
Allocate space in the backing store for computed property names.

The property backing store was pre-allocated for the constant
properties up to the first non-constant (computed name) property.
To use lowering for storing data properties in literals
with computed property names effectively, a fast store is needed, i.e.,
available space in the property backing store for properties
with computed names.

backing_store_size is the number of all properties (including
computed names, but without __proto__)
that is calculated in the ast and passed to the runtime function that allocates
the property backing store. backing_store_size and
constant_properties constitute a BoilerplateDescription.

backing_store_size might be slightly too high because computed names
can evaluate to the same name, but that should be a rare
case so over-allocating is OK.

If a property is __proto__, we don't store it as a regular
property, because the map changes. Keep track of
has_seen_proto in the parser to calculate the
backing store size correctly.

BUG=v8:5625

Review-Url: https://codereview.chromium.org/2632503003
Cr-Commit-Position: refs/heads/master@{#42576}
2017-01-20 18:47:55 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides [build] Roll build a3b623a:11a223f 2016-11-29 11:17:15 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [foozzie] Add correctness fuzzer resources to build output 2017-01-10 10:19:21 +00:00
gypfiles Revert of [build] Introduce an embedder version string (patchset #2 id:20001 of https://codereview.chromium.org/2619213002/ ) 2017-01-10 15:21:29 +00:00
include Revert of [debugger api] remove legacy JSON debug protocol. (patchset #2 id:20001 of https://codereview.chromium.org/2642253005/ ) 2017-01-20 11:30:06 +00:00
infra Infra CQ config: remove deprecated target_ref. 2017-01-17 21:42:28 +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 [runtime] Allocate space for computed property names. 2017-01-20 18:47:55 +00:00
test [wasm] WebAssembly.instantiate has a pair-returning overload 2017-01-20 18:46:44 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Do not ignore inspector_protocol and binutils directories 2017-01-16 13:22:00 +00:00
tools Whitespace change to trigger bots again 2017-01-20 18:41:38 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore Do not ignore inspector_protocol and binutils directories 2017-01-16 13:22:00 +00:00
.gn [build] Roll build a3b623a:11a223f 2016-11-29 11:17:15 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS [counters] Add UseCounters for 'f() = 0' syntax 2016-12-27 17:48:40 +00:00
BUILD.gn includes: move Label out of assembler.h. 2017-01-20 14:21:34 +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. 2017-01-20 04:37:52 +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 Add v8_os_page_size flag for cross compilation 2016-11-15 14:41:03 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Make clemensh owner (wasm, asmjs and general) 2017-01-13 10:20:44 +00:00
PRESUBMIT.py [test] Only run presubmit for changed status files 2016-12-06 11:42:11 +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 Use clang for snapshot_toolchain by default, except on ChromeOS. 2016-08-23 14:04:27 +00:00
WATCHLISTS [inspector] added devtools-reviews@chromium.org in WATCHLISTS for inspector 2016-09-29 15:16:54 +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.