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Sigurd Schneider 53dcadfeae [tools] Add script to count lines of code 
This script counts lines of code before and after preprocessor expansion.
When running:
  tools/locs.py --build-dir out.gn/repro --smallest --largest --worst
in the v8 directory, it reports:

Processed 1,520 files in 24.62 sec.
src         (  625 files):   365,679 to   53,468,383 ( 146.22x)
third_party (  432 files):   239,081 to    9,502,094 (  39.74x)
gen         (   19 files):    64,040 to    1,415,287 (  22.10x)
total       ( 1520 files): 1,173,349 to  102,831,949 (  87.64x)
test        (  392 files):   489,865 to   37,476,036 (  76.50x)
Largest 3 files after expansion:
   33,495 to      140,401 (   4.19x) gen/torque-generated/builtins-array-from-dsl-gen.cc
  100,014 to      140,111 (   1.40x) ../../test/cctest/gay-precision.cc
  100,014 to      140,110 (   1.40x) ../../test/cctest/gay-shortest.cc
Worst expansion (3 files):
        6 to      100,826 (14403.71x) ../../test/fuzzer/wasm-data-section.cc
        6 to      100,826 (14403.71x) ../../test/fuzzer/wasm-function-sigs-section.cc
        6 to      100,826 (14403.71x) ../../test/fuzzer/wasm-globals-section.cc
Smallest 3 input files:
        0 to            0 (   0.00x) ../../testing/gtest/empty.cc
        1 to            0 (   0.00x) ../../src/x64/simulator-x64.cc
        4 to        4,423 ( 884.60x) ../../buildtools/third_party/libc++/trunk/src/utility.cpp

Notry: true
Change-Id: Ie1da942463d9e6a84338a9bd57d9ddc46d2856dc
Reviewed-on: https://chromium-review.googlesource.com/c/1349571
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57822}
2018-11-26 13:57:39 +00:00
benchmarks Reland: [builtins] Implement Array.prototype.slice in Torque 2018-10-19 21:27:19 +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 [build] disable asan on Windows for Torque 2018-10-10 11:47:40 +00:00
include [api] Deprecate ExternalStringResourceBase::IsCompressible 2018-11-23 13:43:48 +00:00
infra [build][test] Remove configs for nosnap fuzzers 2018-11-20 13:09:39 +00:00
samples Add a sample that uses the JS API to create wasm 2018-06-07 23:43:38 +00:00
src [Cleanup] String::GetChars() should assert against heap allocation 2018-11-26 13:56:34 +00:00
test [Cleanup] String::GetChars() should assert against heap allocation 2018-11-26 13:56:34 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party Update V8 DEPS. 2018-11-14 20:08:33 +00:00
tools [tools] Add script to count lines of code 2018-11-26 13:57:39 +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 Ignore .torquelint-cache 2018-10-24 10:24:11 +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 [typedarray] Use fast path for Float32Array.from(float_64_array) and similar 2018-10-26 09:47:46 +00:00
BUILD.gn [asm.js] Remove dead switch logic helper code. 2018-11-26 13:54:27 +00:00
ChangeLog [tools] Merge ChangeLog from latest release 2017-12-19 12:30:56 +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. 2018-11-26 03:30:09 +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 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
OWNERS Reduce wasm OWNERS to current team members 2018-10-15 14:47:49 +00:00
PRESUBMIT.py [tools] Correctly identify and report test crashes and infra failures 2018-10-30 15:05:40 +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.