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[release/9.0] Avoid signed overflow in DBG_FlushInstructionCache #106823

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Aug 22, 2024
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[release/9.0] Avoid signed overflow in DBG_FlushInstructionCache #106823

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6 changes: 3 additions & 3 deletions src/coreclr/pal/src/thread/context.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2068,12 +2068,12 @@ DBG_FlushInstructionCache(
// As a workaround, we call __builtin___clear_cache on each page separately.

const SIZE_T pageSize = GetVirtualPageSize();
INT_PTR begin = (INT_PTR)lpBaseAddress;
const INT_PTR end = begin + dwSize;
UINT_PTR begin = (UINT_PTR)lpBaseAddress;
const UINT_PTR end = begin + dwSize;

while (begin < end)
{
INT_PTR endOrNextPageBegin = ALIGN_UP(begin + 1, pageSize);
UINT_PTR endOrNextPageBegin = ALIGN_UP(begin + 1, pageSize);
if (endOrNextPageBegin > end)
endOrNextPageBegin = end;

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