154 lines
3.1 KiB
C
154 lines
3.1 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include <windows.h>
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#define ONE_MB (1024*1024)
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#define TWO_MB (2*ONE_MB)
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#define PAGE_SIZE (4096)
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#define PAGESPERTWO_MB (TWO_MB/PAGE_SIZE)
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#define TWO_MBREGIONS (8)
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#define NEW_CELL(id,i) ( (id)<<20 | ((i)&0x000fffff) )
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CRITICAL_SECTION ErrorCrit;
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PUCHAR RegionBase;
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DWORD
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SelectPage(
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void
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)
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{
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DWORD PageNum;
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PageNum = GetTickCount();
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PageNum = PageNum >> 3;
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PageNum = PageNum & (PAGESPERTWO_MB-1);
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return PageNum;
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}
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void
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CellError(
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DWORD TwoMegRegion,
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DWORD *Address,
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DWORD ThreadId,
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DWORD OriginalCell,
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DWORD CurrentCell,
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DWORD Iteration
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)
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{
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EnterCriticalSection(&ErrorCrit);
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printf("PAGEIT: Cell Error at %x %p %02lx %08x vs %08x (iter %d)\n",
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TwoMegRegion,
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Address,
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ThreadId,
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OriginalCell,
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CurrentCell,
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Iteration
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);
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DebugBreak();
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LeaveCriticalSection(&ErrorCrit);
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}
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void
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PrintHeartBeat(
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DWORD Id,
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DWORD Counter
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)
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{
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EnterCriticalSection(&ErrorCrit);
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printf("PAGEIT: HeartBeat Id %3d iter %8d\n",
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Id,
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Counter
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);
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LeaveCriticalSection(&ErrorCrit);
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}
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(push)
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#pragma warning(disable:4715) // Not all control paths return (due to infinite loop)
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#endif
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DWORD
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ThreadRoutine(
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PVOID Unused
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)
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{
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DWORD Id;
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DWORD Counter;
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DWORD PageNumber;
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DWORD CellOffset;
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DWORD *CellAddress;
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DWORD OriginalCell;
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DWORD NewCell;
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DWORD i;
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SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_LOWEST);
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Id = GetCurrentThreadId();
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Counter = 0;
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for(;;) {
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PageNumber = SelectPage();
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CellOffset = PageNumber*PAGE_SIZE + Id*sizeof(DWORD);
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CellAddress = (DWORD *)(RegionBase + CellOffset);
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OriginalCell = *CellAddress;
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NewCell = NEW_CELL(Id,Counter);
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for(i=0;i<TWO_MBREGIONS;i++) {
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CellAddress = (DWORD *)(RegionBase + i*TWO_MB + CellOffset);
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if ( OriginalCell != *CellAddress ) {
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CellError(i,CellAddress,Id,OriginalCell,*CellAddress,Counter);
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}
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*CellAddress = NewCell;
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}
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Counter++;
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if ( (Counter/50) * 50 == Counter ) {
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Sleep(500);
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}
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if ( (Counter/1024) * 1024 == Counter ) {
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PrintHeartBeat(Id,Counter);
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}
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}
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return 0;
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}
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(pop)
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#endif
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DWORD
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_cdecl
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main(
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int argc,
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char *argv[],
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char *envp[]
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)
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{
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DWORD i;
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DWORD Id;
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HANDLE Thread;
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InitializeCriticalSection(&ErrorCrit);
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RegionBase = VirtualAlloc(NULL,TWO_MBREGIONS*TWO_MB,MEM_COMMIT,PAGE_READWRITE);
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if ( !RegionBase ) {
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printf("PAGEIT: VirtualAlloc Failed %d\n",GetLastError());
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ExitProcess(1);
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}
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for (i=0;i<(TWO_MBREGIONS-1);i++){
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Thread = CreateThread(NULL,0,ThreadRoutine,NULL,0,&Id);
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if ( Thread ) {
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CloseHandle(Thread);
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}
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}
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ThreadRoutine(NULL);
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return 0;
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}
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