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Michael Lippautz fe822dc984 Reland "heap: Force incremental marking in C++ only workloads"
This is a reland of 4fde332811

Two issues in Blink tests have been fixed before this reland.

Original change's description:
> heap: Force incremental marking in C++ only workloads
>
> ... when above a certain minimum threshold. This is to guard against
> memory running away in scenarios where the JS heap is empty and
> there's only high throughput C++ allocations that don't allow for a
> memory reducer GC to kick in.
>
> This logic should be revisited after Oilpan's young generation
> collector is implemented which may allow switching to a more efficient
> shrinking strategy for initial heap setup.
>
> Bug: chromium:1029379, chromium:1300028, chromium:1300492
> Change-Id: I93924fc2fe77d6226c29358d3afb1cc9d6fbf3b1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3484319
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79255}

Bug: chromium:1029379, chromium:1300028, chromium:1300492
Change-Id: I6cd4a4d358bc1a78f2f001ed50dd9bb3f376f49e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3488370
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79274}
2022-02-25 09:12:47 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
bazel [bazel] Improve bazel build 2022-02-16 11:40:13 +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 [cleanup] Remove deprecated build flag v8_enable_raw_heap_snapshots 2022-02-18 16:21:20 +00:00
include [sandbox] Store external pointers in EmbedderDataSlots in shifted form 2022-02-22 13:40:35 +00:00
infra [infra] migrate simple PRESUBMIT scripts to py3 2022-02-18 13:43:30 +00:00
samples Initialize V8 sandbox in samples 2022-02-14 11:15:10 +00:00
src Reland "heap: Force incremental marking in C++ only workloads" 2022-02-25 09:12:47 +00:00
test s390x: [baseline] Add baseline test for s390x 2022-02-24 19:37:07 +00:00
testing [test][cleanup] Fix -Wshadow warnings in unittests 2021-09-27 08:59:01 +00:00
third_party [infra] Fork test262-harness 2022-02-23 18:47:35 +00:00
tools [tools] Update gcmole 2022-02-24 10:30:13 +00:00
.bazelrc [bazel] Use v8_enable_handle_zapping only in debug builds. 2022-01-11 11:32:39 +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 remove swarming_client 2021-08-24 10:39:33 +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 [infra] Fork test262-harness 2022-02-23 18:47:35 +00:00
.gn Revert "[build] Separate out inspector as a shared library" 2021-07-02 16:15:20 +00:00
.mailmap Restore consistency between .mailmap and AUTHORS 2021-06-24 08:58:04 +00:00
.style.yapf [tools] Add basic pointer compression to grokdump 2022-02-04 14:35:26 +00:00
.vpython Verify mac-arm64 wheels for v8/.vpython spec. 2021-09-15 21:11:50 +00:00
.vpython3 [infra] Make various scripts compatible with Python3 2022-02-04 07:17:24 +00:00
.ycm_extra_conf.py [ycm] Fix python script 2021-07-29 09:48:32 +00:00
AUTHORS [riscv64] Add RVV Float-Point Widening Instructions 2022-02-22 10:59:25 +00:00
BUILD.bazel [turbofan] Verification pass for SimplifiedLowering 2022-02-24 16:33:37 +00:00
BUILD.gn [turbofan] Verification pass for SimplifiedLowering 2022-02-24 16:33:37 +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 Update OWNERS files 2022-02-16 08:16:04 +00:00
DEPS Update ICU 2022-02-25 05:57:39 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Add verwaest@ to ENG_REVIEW_OWNERS. 2021-09-16 15:00:57 +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
LOONG_OWNERS [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
MIPS_OWNERS [mips] Add LiuYu to MIPS_OWNERS 2021-09-08 01:38:52 +00:00
OWNERS Let infra owners own all dot files 2021-11-05 18:57:18 +00:00
PPC_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
PRESUBMIT.py [infra] migrate the main PRESUBMIT script to py3 2022-02-18 13:44:33 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
RISCV_OWNERS Add Lu Yahan to RISC-V owners list 2021-09-13 16:35:00 +00:00
S390_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
WATCHLISTS Update WATCHLISTS 2022-02-24 11:37:36 +00:00
WORKSPACE [bazel] Cleanup style with Buildifier. 2022-01-11 10:00:36 +00:00

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.