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Frank Emrich 4242b1929c [dict-proto] update comment describing layout of ordered hash tables 
The comment at the beginning of ordered-hash-table.h desribing the
layout of ordered hash tables seems to have become outdated.

1. There was a "kPrefixSize + " missing in the description of the left
  bound of the first non-fixed-sized part in normal and obsoleted
  tables.

The following only affects obsoleted tables:

2. The bucket count doesn't reside at [kPrefixSize + 0], instead it is
  unchanged w.r.t normal tables, and resides at [kPrefixSize + 2]
3. The next newer table takes place of the element count, residing
  at  [kPrefixSize + 0]. This can be seen by NextTableIndex() being
  defined as NumberOfElementsIndex()
4. The number of removed holes is never written anywhere when
  obsoleting a table. Instead, the number of deleted elements count is
  used for this. This can be see by
  DCHECK_EQ(table->NumberOfDeletedElements(), removed_holes_index);
  in method Rehash
5. kClearedTableSentinel is written to the number of deleted element
  slot when clearing a table, as seen by
  table->SetNumberOfDeletedElements(kClearedTableSentinel);
  in method Clear

Bug: v8:7569, v8:11074
Change-Id: I0e6750fc57c90b6c09fc41f001cd555f7c455fd3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2505763
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70918}
2020-11-02 13:42:50 +00:00
build_overrides tracing: Enable using Perfetto client library from Chromium 2020-05-11 11:17:57 +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 tracing: Update proto library build rule and roll Perfetto 2020-10-07 12:49:09 +00:00
include Fix alloc/dealloc size mismatch for v8::BackingStore 2020-11-02 11:57:30 +00:00
infra Add Noavx tests to Linux 32 bots 2020-10-30 11:46:32 +00:00
samples cppgc: Use libplatform as default platform 2020-10-08 18:16:52 +00:00
src [dict-proto] update comment describing layout of ordered hash tables 2020-11-02 13:42:50 +00:00
test [inspector][fuzzer] Extract more functionality for reuse 2020-11-02 09:07:00 +00:00
testing build: Remove no-op calls to set_sources_assignment_filter 2020-10-08 14:44:01 +00:00
third_party [csa][cleanup] Remove ParameterMode/TNodify StoreFixedDoubleArrayElement 2020-08-26 17:14:44 +00:00
tools [tools][system-analyzer] Improve map stats panel 2020-10-30 22:48:18 +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 [infra] Update .git-blame-ignore-revs 2020-03-03 12:59:13 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Revert "[presubmit] Add JS formatting for tools/system-analyzer" 2020-07-17 10:33:40 +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 Fix ycm config for headers without source 2019-12-09 11:59:21 +00:00
AUTHORS perf: make GetPositionInfoSlow() faster 2020-10-27 07:15:01 +00:00
BUILD.gn [torque] generate C++ class definitions per Torque file 2020-10-28 17:43:06 +00:00
CODE_OF_CONDUCT.md
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
COMMON_OWNERS Adding vahl@ to the common owners to be able to handle 2020-08-21 09:04:56 +00:00
DEPS Update V8 DEPS. 2020-11-02 03:46:19 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
INFRA_OWNERS Add team members as owners 2020-08-18 08:29:04 +00:00
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +00:00
LICENSE.fdlibm
LICENSE.strongtalk
LICENSE.v8
MIPS_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
OWNERS Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
PPC_OWNERS Adding Red Hat to the list of Authorized contributors. 2020-09-16 12:34:39 +00:00
PRESUBMIT.py [presubmit] Allow use of test functions in runtime-test.cc 2020-08-10 12:12:55 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
S390_OWNERS Adding Red Hat to the list of Authorized contributors. 2020-09-16 12:34:39 +00:00
WATCHLISTS Stop watching for API changes in WATCHLISTS 2020-04-08 07:06:45 +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.