Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: bdb1b12f3a60c5e20a27c394a2a86de7401a8621
https://github.com/WebKit/WebKit/commit/bdb1b12f3a60c5e20a27c394a2a86de7401a8621
Author: Yijia Huang <[email protected]>
Date: 2026-04-20 (Mon, 20 Apr 2026)
Changed paths:
M Source/JavaScriptCore/wasm/debugger/WasmExecutionHandler.cpp
Log Message:
-----------
[JSC][WASM][Debugger] Fix null stopData crash for StackOverflow/Termination
traps
https://bugs.webkit.org/show_bug.cgi?id=312707
rdar://175100468
Reviewed by Mark Lam.
When check_stack_and_vm_traps detects both NeedStopTheWorld and
StackOverflow/Termination in the prologue, handleTrapsIfNeeded() processes
NeedStopTheWorld first: setPrologueStopData sets stopData, the debugger
serves the stop, then clearStop() nulls stopData on resume. When the
prologue subsequently throws StackOverflow/Termination and calls
handleDebuggerTrapIfNeeded(), stopData is null and
RELEASE_ASSERT(isStoppedAtPrologue()) fires.
Fix by re-establishing prologue stop context with setPrologueStopData()
when stopData is absent.
Canonical link: https://commits.webkit.org/311619@main
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