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Francis McCabe 0e4e718006 Revert "Mark functions for optimization only on bytecode budget interrupts" 
This reverts commit 9efe315ee2.

Reason for revert: Causing time out issues on box2d tests:

https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20debug/27752

and

https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20-%20debug/29630

Original change's description:
> Mark functions for optimization only on bytecode budget interrupts
> 
> We used to mark functions for optimization on any interrupt. This sometimes
> causes functions to OSR when not needed. The implementation was such because
> we didn't have a different runtime function to distinguish bytecode budget
> interrupts from other interrupts. For lazy feedback allocation we added a
> new runtime function for bytecode budget interrupts so it makes it easier
> to actually mark functions only when needed.
> 
> This also includes a fix to reduce the stack limits for interrupts when
> entering a scope that allows interrupts from a postponed interrupt scope.
> 
> Bug: chromium:993061
> Change-Id: Iaf7b4dccb7a503e5b6bfcbb993bc7482aa593955
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1829218
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64048}

TBR=rmcilroy@chromium.org,mythria@chromium.org,leszeks@chromium.org

Change-Id: I97938934fdaa030b958695d18e1788d75c17077c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:993061
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1832645
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64053}
2019-09-30 20:43:36 +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 [tools] Use instance types of known Maps in v8_debug_helper 2019-09-20 16:00:59 +00:00
include [inspector] Add "disableBreaks" parameter to "Runtime.evaluate". 2019-09-27 12:16:01 +00:00
infra [test] Bump shards on slow bot 2019-09-26 10:15:57 +00:00
samples [cleanup] Drop some occurrences of Isolate::Current 2019-06-26 19:39:21 +00:00
src Revert "Mark functions for optimization only on bytecode budget interrupts" 2019-09-30 20:43:36 +00:00
test Modify the DCHECK in when computing KeyedAccessStoreMode. 2019-09-30 18:59:48 +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 Improve JavaScript debugging in d8 2019-09-30 11:19:49 +00:00
.clang-format
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig
.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
.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
AUTHORS [log] report code relocation through CodeEventHandler 2019-09-24 10:50:05 +00:00
BUILD.gn Revert "[heap] Insert directly into RememberedSet and remove StoreBuffer" 2019-09-30 14:20:31 +00:00
ChangeLog [release] Merge ChangeLog back to master 2018-12-07 15:41:59 +00:00
CODE_OF_CONDUCT.md
codereview.settings
COMMON_OWNERS Rename clemensh to clemensb in OWNERS 2019-09-26 08:44:44 +00:00
DEPS Update V8 DEPS. 2019-09-30 03:23:12 +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
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
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.