170 lines
3.3 KiB
C++
170 lines
3.3 KiB
C++
//
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// Universal Resource Consumer: Just an innocent stress program
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// Copyright (c) Microsoft Corporation, 1997, 1998, 1999
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//
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//
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// module: physmem.cxx
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// author: silviuc
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// created: Fri Apr 10 14:05:05 1998
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <windows.h>
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#include "error.hxx"
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#include "physmem.hxx"
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#include "consume.hxx"
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//
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// Local functions
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//
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BOOL
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CheckMemoryRegion (
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LPVOID Address,
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SIZE_T Size);
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//
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// Function:
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//
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// ConsumeAllPhysicalMemory
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//
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// Description:
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//
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// This routine will consume all physical memory.
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// It will do so by increasing the working set size and locking the pages
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// in memory.
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//
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void ConsumeAllPhysicalMemory ()
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{
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BOOL Result;
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SIZE_T MinWsSize;
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SIZE_T MaxWsSize;
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SIZE_T RegionSize;
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LPVOID Region;
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//
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// For ever loop in which we try to grab as much physical memory
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// as possible.
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//
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for (RegionSize = 0x100000; ; )
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{
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//
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// Eat more ...
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//
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Region = VirtualAlloc (NULL, RegionSize, MEM_COMMIT, PAGE_READWRITE);
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if (Region == NULL) {
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Sleep (1000);
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//
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// We've got an allocation error.
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// Switch to 64K chunks and try again.
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//
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RegionSize = 0x10000;
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continue;
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}
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if (VirtualLock (Region, RegionSize) == FALSE) {
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VirtualFree (Region, 0, MEM_RELEASE);
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//
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// We have to increase the working set if possible.
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//
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Result = GetProcessWorkingSetSize(
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GetCurrentProcess(),
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&MinWsSize,
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&MaxWsSize);
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if (Result == FALSE)
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{
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Sleep (1000);
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continue;
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}
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MinWsSize += 0x10000;
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MaxWsSize += 0x10000;
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Result = SetProcessWorkingSetSize(
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GetCurrentProcess(),
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MinWsSize,
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MaxWsSize);
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if (Result == FALSE) {
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Sleep (1000);
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}
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continue;
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}
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else {
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//
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// Memory is allocated and locked. Touch it.
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//
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assert_ (Region != NULL);
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CheckMemoryRegion (Region, RegionSize);
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}
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printf (".");
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}
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}
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//
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// Function:
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//
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// CheckMemoryRegion
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//
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// Description:
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//
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// This function checks that the memory region is zeroed as
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// it should be when a region has just been allocated and
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// then reads and writes work properly.
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//
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BOOL
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CheckMemoryRegion (
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LPVOID Address,
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SIZE_T Size)
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{
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LPBYTE Start, End, Current;
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Current = Start = (LPBYTE) Address;
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End = Start + Size;
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for ( ; Current < End; Current += 1024) {
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if (*Current != 0 || (End - Current >= 1024 && *(Current + 1023) != 0)) {
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Message ("Page at %p not zeroed \n");
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return FALSE;
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}
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*Current = *(Current + 1023) = 0xAB;
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if (*Current != 0xAB || (End - Current >= 1024 && *(Current + 1023) != 0xAB)) {
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Message ("Page at %p has R/W error \n");
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return FALSE;
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}
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}
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return TRUE;
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}
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//
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// end of module: physmem.cxx
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//
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