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Clemens Backes f15a656dc1 [wasm] Use unprotected loads for known in-bound accesses 
For memory accesses that are statically known to be in bounds, avoid the
out-of-line code for the trap handler. This makes trap handler metadata
smaller, reduces code size (by avoiding OOL code), and enables more
optimizations at later phases, because unprotected memory loads can be
reordered and reused.

Drive-by: Use {GetMemoryAccessKind} consistently.

R=ahaas@chromium.org

Bug: v8:11802
Change-Id: Ia824d3355a95f446a796c5b06f69ecaa1500709b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2912585
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74776}
2021-05-26 08:21:53 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
build_overrides [build] Remove obsolete gn flag 2021-01-11 15:50:59 +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 Make Google benchmark dependency a default 2021-04-21 12:19:40 +00:00
include Remove one-shot function optimizations. 2021-05-21 12:38:18 +00:00
infra [infra] Switch back to Xenial on some bots 2021-05-25 13:18:42 +00:00
samples Reland "[api] Add v8::Isolate::ThrowError helper" 2021-04-16 11:48:05 +00:00
src [wasm] Use unprotected loads for known in-bound accesses 2021-05-26 08:21:53 +00:00
test Revert "Reland "[wasm][bug] Fix a couple of bugs in validation of unreachable code"" 2021-05-26 07:27:13 +00:00
testing build: Remove no-op calls to set_sources_assignment_filter 2020-10-08 14:44:01 +00:00
third_party Roll inspector_protocol to 35e8d2d89cb017d72cf905362672de77c978e1e 2021-05-15 01:24:37 +00:00
tools [testrunner] Implicitly detect trivial flag contraditions 2021-05-26 07:42:43 +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 [build] Remove legacy binutils 2021-01-08 12:33:31 +00:00
.gn [infra] Force Python 3 to be used in build. 2021-05-11 12:04:34 +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 Implementation of the branch hinting proposal for WebAssembly. 2021-05-14 13:40:57 +00:00
BUILD.gn Reland "[codegen] Add TSAN support for tagged stores in generated code" 2021-05-24 10:36:31 +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 Remove petermarshall from OWNERS 2021-03-31 11:00:22 +00:00
DEPS [test262] Roll test262 2021-05-25 16:46:45 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Update ENG_REVIEW_OWNERS 2021-02-25 14:28:32 +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 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
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OWNERS [WATCHLISTS] Add a watchlist for regexp 2021-05-18 19:00:57 +00:00
PPC_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
PRESUBMIT.py [bigint] Move multiplication to src/bigint/ 2021-04-19 15:40:43 +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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WATCHLISTS [WATCHLISTS] Add a watchlist for regexp 2021-05-18 19:00:57 +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.