[webkit-changes] [WebKit/WebKit] d6c40e: [JSC] Add useCompilerSignpost option to emit signp...

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: d6c40e2a0098eab3db91270abcdeefe6059db682
      https://github.com/WebKit/WebKit/commit/d6c40e2a0098eab3db91270abcdeefe6059db682
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2024-01-25 (Thu, 25 Jan 2024)

  Changed paths:
    M Source/JavaScriptCore/jit/JITCompilationMode.cpp
    M Source/JavaScriptCore/jit/JITPlan.cpp
    M Source/JavaScriptCore/runtime/OptionsList.h
    M Source/WTF/wtf/SystemTracing.h

  Log Message:
  -----------
  [JSC] Add useCompilerSignpost option to emit signpost with compiled function information
https://bugs.webkit.org/show_bug.cgi?id=268067
rdar://121584775

Reviewed by Ryosuke Niwa.

This patch adds a JSC option, useCompilerSignpost, which can emit signpost for JSC JIT Compiler activities.
We record function name etc. as an interval signpost to investigate compiler activities in the complicated workload.
We also adjust JITCompilationMode's string to make it more modern and readable.

* Source/JavaScriptCore/jit/JITCompilationMode.cpp:
(WTF::printInternal):
* Source/JavaScriptCore/jit/JITPlan.cpp:
(JSC::JITPlan::compileInThread):
* Source/JavaScriptCore/runtime/OptionsList.h:
* Source/WTF/wtf/SystemTracing.h:

Canonical link: https://commits.webkit.org/273507@main