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Merge pull request #30 from rafaelrfreitas/fix-writeonly-mem-bps 

fix: ensure write-only breakpoints trigger on Copy-on-Write pages
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Duncan Ogilvie 2026-03-28 14:35:33 +01:00 committed by GitHub
parent e6570203cc ebdc74d23b
commit 1232bce7f6
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1 changed files with 6 additions and 2 deletions
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8
TitanEngine/Global.Breakpoints.cpp
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@ -251,13 +251,17 @@ DWORD GetPageProtectionForMemoryBreakpoint(const MemoryBreakpointPageDetail & pa
if(page.writeBps > 0)
{
// Remove write access e.g. PAGE_EXECUTE_READWRITE => PAGE_EXECUTE
// Remove write access (and copy-on-write) e.g. PAGE_EXECUTE_READWRITE => PAGE_EXECUTE
DWORD dwBase = newProtect & 0xFF;
switch(dwBase)
{
case PAGE_READWRITE:
case PAGE_WRITECOPY:
newProtect = (newProtect & 0xFFFFFF00) | PAGE_READONLY;
break;
case PAGE_EXECUTE_READWRITE:
newProtect = (newProtect & 0xFFFFFF00) | (dwBase >> 1);
case PAGE_EXECUTE_WRITECOPY:
newProtect = (newProtect & 0xFFFFFF00) | PAGE_EXECUTE_READ;
break;
}
}