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b8490293cc
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Benedikt Meurer b8490293cc [tracing] Properly trace stack guards and interrupts. 
Add tracing support for the %StackGuard() and %Interrupt() runtime calls
and the individual actions performed in StackGuard::HandleInterrupts().
This includes:

 - "V8.GCHandleGCRequest" (in "disabled-by-default-v8.gc") when the
   GC_REQUEST bit is set.
 - "V8.WasmGrowSharedMemory" (in "disabled-by-default-v8.wasm") when
   the GROW_SHARED_MEMORY bit is set.
 - "V8.TerminateExecution" (in "v8.execute") when the
   TERMINATE_EXECUTION bit is set.
 - "V8.GCDeoptMarkedAllocationSites" (in "disabled-by-default-v8.gc")
   when the DEOPT_MARKED_ALLOCATION_SITES bit is set.
 - "V8.InstallOptimizedFunctions" (in "disabled-by-default-v8.compile")
   when the INSTALL_CODE bit is set.
 - "V8.InvokeApiInterruptCallbacks" (in "v8.execute") when the
   API_INTERRUPT bit is set.

Now we also emit a trace event "V8.MarkCandidatesForOptimization" (in
"disabled-by-default-v8.compile") in addition to the above from the
RuntimeProfiler when we mark candidates for optimization at the end
of each stack check.

An example of the "V8.InstallOptimizedFunctions" in action (in the
trace viewer) can be seen here:

  https://i.paste.pics/094a04af035eedc0690cd4079afa28f1.png

This supersedes the previously introduced --trace-interrupts CLI flag,
which is thus removed as part of this change.

Bug: v8:8598
Change-Id: I3c3375d00b07cbe700b6912097d7264031ace802
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1538116
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60428}
2019-03-25 10:36:51 +00:00
benchmarks [test] Ensure random generator in JSTests does not use float arithmetic 2018-12-17 10:05:08 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
custom_deps [build] Add common directory for custom deps 2018-06-08 19:23:02 +00:00
docs [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
gni profiler: Provide raw heap snapshots 2019-03-20 09:27:32 +00:00
include Revert "V8 x64 backend doesn't emit ABI compliant stack frames" 2019-03-20 14:36:04 +00:00
infra Revert "Reland "[ptr-compr][x64] Temporarily enable pointer compression on x64"" 2019-03-21 17:57:15 +00:00
samples Add a sample that uses the JS API to create wasm 2018-06-07 23:43:38 +00:00
src [tracing] Properly trace stack guards and interrupts. 2019-03-25 10:36:51 +00:00
test [wasm] Handle rejected input promise in WebAssembly.compileStreaming 2019-03-25 10:18:23 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party [DevTools] Roll inspector_protocol to a7423d8ca937e658ab3b85e3b02676bced145ba6. 2019-03-13 18:19:28 +00:00
tools [tracing] Add the proto to json converter for trace events 2019-03-25 08:56:18 +00:00
.clang-format
.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
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Add .ccls-cache to .gitignore 2019-02-26 10:32:45 +00:00
.gn [test] Remove obsolete test262 archive extract 2018-03-28 13:52:15 +00:00
.vpython [tools] Correctly identify and report test crashes and infra failures 2018-10-30 15:05:40 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS Use inherited ctors for MacroAssembler and TurboAssembler 2019-03-08 09:31:30 +00:00
BUILD.gn [regexp] Port RegExp.prototype[@@replace] to Torque 2019-03-22 03:18:06 +00:00
ChangeLog [release] Merge ChangeLog back to master 2018-12-07 15:41:59 +00:00
CODE_OF_CONDUCT.md
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2019-03-25 03:41:17 +00:00
LICENSE Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +00:00
LICENSE.fdlibm
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
OWNERS [owners] Add szuend@chromium.org to top level owners 2019-03-18 09:37:52 +00:00
PRESUBMIT.py Revert "[torque] Temporarily disable torque format check to pass presubmit" 2019-02-20 14:07:17 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
snapshot_toolchain.gni Make win/cross build work better when targeting arm64 on macOS hosts. 2019-03-22 18:30:23 +00:00
WATCHLISTS Update WATCHLIST wrt yangguo 2018-11-23 08:29:12 +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.