[webkit-changes] [WebKit/WebKit] 3e4d37: [JSC] StringSubstring can throw OOM

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 3e4d37cbb0a2ec3d9b7bab8474137ef5f51e2da9
      https://github.com/WebKit/WebKit/commit/3e4d37cbb0a2ec3d9b7bab8474137ef5f51e2da9
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2022-10-31 (Mon, 31 Oct 2022)

  Changed paths:
    A JSTests/stress/string-substring-oom.js
    M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp

  Log Message:
  -----------
  [JSC] StringSubstring can throw OOM
https://bugs.webkit.org/show_bug.cgi?id=247272
rdar://101235545

Reviewed by Mark Lam.

Since StringSubstring can throw OOM, we should check exception after callOperation.

* JSTests/stress/string-substring-oom.js: Added.
(foo):
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileStringSubstring):

Canonical link: https://commits.webkit.org/256169@main