[webkit-changes] [WebKit/WebKit] 48684d: Fix race condition in ARM64 disassembler initializ...

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  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 48684d06eb78b8546fd78bd554eeb87d1c921289
      https://github.com/WebKit/WebKit/commit/48684d06eb78b8546fd78bd554eeb87d1c921289
  Author: David Degazio <d_degazio at apple.com>
  Date:   2023-11-30 (Thu, 30 Nov 2023)

  Changed paths:
    M Source/JavaScriptCore/disassembler/ARM64/A64DOpcode.cpp
    M Source/JavaScriptCore/disassembler/ARM64/A64DOpcode.h

  Log Message:
  -----------
  Fix race condition in ARM64 disassembler initialization
https://bugs.webkit.org/show_bug.cgi?id=265469
rdar://118890976

Reviewed by Mark Lam and Yusuke Suzuki.

Moves A64DOpcode::init() inside a std::call_once to ensure it is
not called simultaneously from more than one thread.

* Source/JavaScriptCore/disassembler/ARM64/A64DOpcode.h:
(JSC::ARM64Disassembler::A64DOpcode::A64DOpcode):

Canonical link: https://commits.webkit.org/271350@main