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Adam Klein 32f285533e Revert "[osr] Basic support for concurrent OSR" 
This reverts commit 3ce690eef2.

Reason for revert: failures on CrOS MSan build: https://crbug.com/1312188

Original change's description:
> [osr] Basic support for concurrent OSR
>
> This CL adds basic support behind --concurrent-osr,
> disabled by default.
>
> When enabled:
> 1) the first OSR request starts a concurrent OSR compile job.
> 2) on completion, the code object is inserted into the OSR cache.
> 3) the next OSR request picks up the cached code (assuming the request
>    came from the same JumpLoop bytecode).
>
> We add a new osr optimization marker on the feedback vector to
> track whether an OSR compile is currently in progress.
>
> One fundamental issue remains: step 3) above is not guaranteed to
> hit the same JumpLoop, and a mismatch means the OSR'd code cannot
> be installed. This will be addressed in a followup by targeting
> specific bytecode offsets for the install request.
>
> This change is based on fanchen.kong@intel.com's earlier
> change crrev.com/c/3369361, thank you!
>
> Bug: v8:12161
> Change-Id: Ib162906dd4b6ba056f62870aea2990f1369df235
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3548820
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Jakob Linke <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79685}

Bug: v8:12161, chromium:1312188
Change-Id: Iac1e3fd67ecc658a1cdee8f4d13354c097ed6697
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3564983
Auto-Submit: Adam Klein <adamk@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79702}
2022-04-01 00:13:40 +00:00
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bazel [bazel] Add v8_enable_short_builtin_calls flag 2022-03-18 13:45:04 +00:00
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gni [cleanup] Remove deprecated build flag v8_enable_raw_heap_snapshots 2022-02-18 16:21:20 +00:00
include Deprecate some signature checks 2022-03-31 12:11:21 +00:00
infra Increase shards for tests timing out 2022-03-30 15:21:41 +00:00
samples Initialize V8 sandbox in samples 2022-02-14 11:15:10 +00:00
src Revert "[osr] Basic support for concurrent OSR" 2022-04-01 00:13:40 +00:00
test Revert "[osr] Basic support for concurrent OSR" 2022-04-01 00:13:40 +00:00
testing [test][cleanup] Fix -Wshadow warnings in unittests 2021-09-27 08:59:01 +00:00
third_party Convert inspector_protocol/roll.py to python3 2022-03-24 18:07:17 +00:00
tools Re-enabling some migrated test files 2022-03-31 14:44:19 +00:00
.bazelrc [bazel] Use v8_enable_handle_zapping only in debug builds. 2022-01-11 11:32:39 +00:00
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.vpython Verify mac-arm64 wheels for v8/.vpython spec. 2021-09-15 21:11:50 +00:00
.vpython3 Use numpy 1.2x.supported.1 in V8 2022-03-03 15:21:21 +00:00
.ycm_extra_conf.py [ycm] Fix python script 2021-07-29 09:48:32 +00:00
AUTHORS [turbolizer] Shortcuts for bidirectional phase switching. 2022-03-28 08:13:32 +00:00
BUILD.bazel Reland "[wasm-gc] Implement isorecursive canonicalization" 2022-03-31 15:45:49 +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.