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Dominik Inführ 84ec511b10 [heap] Do not calculate SlotSet in RecordWrite 
Since SlotSet is just an array of Buckets, RecordWrite doesn't need
to calculate the SlotSet-address in the SlotSet-array. bucket_index is
now directly calculated from the offset of the slot from the start of
the page. bucket_index may therefore now also exceed SlotSet::kBuckets,
for large objects.

Also calculate cell_offset and bit_index from page_start_offset, it is
not necessary to truncate page_start_offset to MemoryChunk::kPageSize.

Bug: v8:9454
Change-Id: I17edeafa4681a6348482c64dd0616065ce3121c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1849525
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64197}
2019-10-09 16:13:13 +00:00
benchmarks Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
build_overrides Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
custom_deps Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
docs Add OWNERS for docs/ 2019-05-15 12:06:15 +00:00
gni Enable v8_use_snapshot by default for 64-bit Windows cross builds 2019-10-07 14:33:32 +00:00
include [ptr-compr] Fix build issues on win64 and mac64 2019-10-09 13:02:01 +00:00
infra [build] Switch off goma on msvs builders 2019-10-09 12:30:37 +00:00
samples [cleanup] Drop some occurrences of Isolate::Current 2019-06-26 19:39:21 +00:00
src [heap] Do not calculate SlotSet in RecordWrite 2019-10-09 16:13:13 +00:00
test [top-level-await] Support top level for-await. 2019-10-09 14:31:31 +00:00
testing Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
third_party Remove unnecessary HasOwnProperty check from Array#sort 2019-09-18 12:39:43 +00:00
tools [gdb] Do not set disassembly-flavor on non-x86 platforms. 2019-10-09 11:25:21 +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
.flake8 Add .flake8 to allow for python style checking. 2019-07-19 21:44:03 +00:00
.git-blame-ignore-revs Add recent code rewrite to .git-blame-ignore-revs 2019-05-23 10:38:45 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Remove MIPS(64) builders from V8 infra 2019-09-16 11:20:11 +00:00
.gn [build] Dynamically decide if to use system xcode 2019-07-29 08:20:24 +00:00
.vpython [tools] Implement confidence-based number of runs 2019-05-09 09:42:28 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS [log] report code relocation through CodeEventHandler 2019-09-24 10:50:05 +00:00
BUILD.gn [postmortem] add metadata for the new DescriptorArray layout 2019-10-08 17:43:55 +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
COMMON_OWNERS Rename clemensh to clemensb in OWNERS 2019-09-26 08:44:44 +00:00
DEPS Update V8 DEPS. 2019-10-09 03:45:38 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
INFRA_OWNERS Clean up infra owners 2019-05-15 11:18:43 +00:00
INTL_OWNERS Add missing owners files 2019-05-31 07:21:01 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +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
MIPS_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
OWNERS Add syg@chromium.org as DEPS owner for test262 rolls 2019-09-17 19:29:11 +00:00
PPC_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
PRESUBMIT.py Re-check all files on a DEPS change 2019-09-30 09:23:36 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
S390_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
WATCHLISTS Move remaining files in src/ 2019-05-24 18:24:36 +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://v8.dev/docs

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 at v8.dev/docs/contribute.