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Enlarge stack overflow handling stack #114956

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Merged
merged 1 commit into from
Apr 23, 2025
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Enlarge stack overflow handling stack #114956

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2 changes: 1 addition & 1 deletion src/coreclr/pal/src/exception/signal.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -206,7 +206,7 @@ BOOL SEHInitializeSignals(CorUnix::CPalThread *pthrCurrent, DWORD flags)
}

// Allocate the minimal stack necessary for handling stack overflow
int stackOverflowStackSize = ALIGN_UP(sizeof(SignalHandlerWorkerReturnPoint), 16) + 8 * 4096;
int stackOverflowStackSize = ALIGN_UP(sizeof(SignalHandlerWorkerReturnPoint), 16) + 9 * 4096;
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Copilot AI Apr 23, 2025

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Please add an inline comment explaining why the additional 4096 bytes (9 pages) are now required, to aid future maintainers in understanding the rationale behind this change.

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// Align the size to virtual page size and add one virtual page as a stack guard
stackOverflowStackSize = ALIGN_UP(stackOverflowStackSize, GetVirtualPageSize()) + GetVirtualPageSize();
int flags = MAP_ANONYMOUS | MAP_PRIVATE;
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