Robert Reif <[EMAIL PROTECTED]> writes: > I'm trying to write a test that checks for data overruns > using VirtualAlloc and VirtualProtect and I think > I may have found a bug. Here is the problem: > > DWORD dwPageSize; > BYTE * twoPages, temp; > DWORD flOldProtect; > twoPages = VirtualAlloc(NULL, 2 * dwPageSize, MEM_RESERVE | > MEM_COMMIT, PAGE_READWRITE); > res = VirtualProtect(twoPages + dwPageSize, dwPageSize, PAGE_NOACCESS, > &flOldProtect); > temp = twoPages[dwPageSize + 1]; // should cause exception but > doesn't in wine > twoPages[dwPageSize + 1] = 0; // does cause exception
Most likely the read access was optimized out. Try doing the access through a volatile pointer. -- Alexandre Julliard [EMAIL PROTECTED]
