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Clemens Backes 0dc598df0c [wasm] Refactor callback triggering 
1) Instead of passing three boolean values to |TriggerCallbacks|, pass
   one EnumSet which contains all events to trigger.
2) Remember which events already happened, to avoid triggering them
   again.
3) Compute triggered events once after the loop in |OnFinishedUnits|,
   instead of checking for every finished unit.
4) When a new callback is registered, trigger all previous events
   immediately. This solves issue v8:10217.
5) Replace |NotifyTopTierReady| by |AddCallback| which is identical now.
6) Do not call |OnFinishedJSToWasmWrapperUnits| if no wrappers were
   compiled (this is a minor performance optimization; we save taking
   and releasing a lock).
7) Drive-by: Make the |EnumSet| constructor really constexpr (by making
   |Mask| constexpr).

R=ahaas@chromium.org

Bug: v8:10217
Change-Id: Ib3688a1687ad7b523e90efd73f4073e9f1193016
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2072737
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66459}
2020-02-26 11:57:14 +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 Add initial support for Wasm debugging with LLDB: implements a GDB-remote stub 2020-02-20 22:27:58 +00:00
include Updated documentation for {replMode} parameter in {Runtime.evaluate} 2020-02-26 08:53:32 +00:00
infra Test with --no-lazy-feedback-allocation on one x64 builder set. 2020-02-17 16:10:37 +00:00
samples [cleanup] Drop some occurrences of Isolate::Current 2019-06-26 19:39:21 +00:00
src [wasm] Refactor callback triggering 2020-02-26 11:57:14 +00:00
test [heap] Clean up GCIdleTimeHandler. 2020-02-26 10:43:14 +00:00
testing Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
third_party [DevTools] Roll inspector_protocol (v8) 2020-02-11 18:45:53 +00:00
tools [weakrefs] Rename FinalizationGroup to FinalizationRegistry in C++ 2020-02-24 23:02:12 +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
.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 [git] Ignore jit-*.dump files 2020-01-07 12:14:15 +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 [ppc64][ppc] Split up ARCH_PPC and ARCH_PPC64 2020-02-21 15:42:20 +00:00
BUILD.gn [weakrefs] Rename FinalizationGroup to FinalizationRegistry in C++ 2020-02-24 23:02:12 +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 Add syg to COMMON_OWNERS 2020-02-19 22:03:38 +00:00
DEPS Roll test262 2020-02-26 07:34:42 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
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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
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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 Remove the #undef check from the Presubmit for .cc files 2020-01-24 15:24:51 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
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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.