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[clr-ios] Fix exception handling for debugger interception #126955

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[clr-ios] Fix exception handling for debugger interception #126955

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291131f
Fix interpreter exception handling for debugger interception
kotlarmilos Apr 15, 2026
d77ff60
Apply -1 controlPC adjustment uniformly for interp; narrow Interprete…
kotlarmilos Apr 22, 2026
1eb2838
Remove explanatory comments
kotlarmilos Apr 22, 2026
23fa28f
Nit
kotlarmilos Apr 27, 2026
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15 changes: 15 additions & 0 deletions src/coreclr/vm/exceptionhandling.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3992,12 +3992,27 @@ CLR_BOOL SfiNextWorker(StackFrameIterator* pThis, uint* uExCollideClauseIdx, CLR
EH_LOG((LL_INFO100, "SfiNext: current frame is filter funclet\n"));
isPropagatingToNativeCode = TRUE;
}
#ifdef FEATURE_INTERPRETER
// Detect interpreter-to-native transition past the last interpreted frame.
else if (codeInfo.IsInterpretedCode())
{
EH_LOG((LL_INFO100, "SfiNext: native transition past last interpreter frame\n"));
isPropagatingToNativeCode = TRUE;
}
#endif // FEATURE_INTERPRETER
}

if (isPropagatingToNativeCode)
{
pFrame = pThis->m_crawl.GetFrame();

#ifdef FEATURE_INTERPRETER
if (pFrame != FRAME_TOP && pFrame->GetFrameIdentifier() == FrameIdentifier::InterpreterFrame)
{
pFrame = pFrame->PtrNextFrame();
}
#endif // FEATURE_INTERPRETER

// Check if there are any further managed frames on the stack or a catch for all exceptions in native code (marked by
// DebuggerU2MCatchHandlerFrame with CatchesAllExceptions() returning true).
// If not, the exception is unhandled.
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