76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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heap.c
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Abstract:
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This file contains a heap validation routines.
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Author:
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Wesley Witt (wesw) 2-Feb-94
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Environment:
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Win32, User Mode
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*/
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "heap.h"
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DWORD fHeapCheck = TRUE;// used to globally enable or disable heap checking
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VOID ValidateTheHeap(LPSTR fName, DWORD dwLine)
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/*++
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Routine Description:
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Validate the process's heap.
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If the heap is found to be invalid then a messagebox is displayed that indicates the caller's file & line number.
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If the BO button is pressed on the message box then DebugBreak is called.
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Arguments:
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fName - caller's source filename
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dwLine - caller's source line number
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*/
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{
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CHAR buf[256];
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INT id;
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// we don't really want to allocate memory here, since the whole point was to look for heap corruption.
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// Instead, just preallocate an unreasonable number of slots...
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PVOID ProcessHeaps[64];
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DWORD NumberOfHeaps = 64;
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DWORD Heap;
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if (fHeapCheck)
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{
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NumberOfHeaps = GetProcessHeaps(NumberOfHeaps, ProcessHeaps);
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for (Heap = 0; Heap < NumberOfHeaps; Heap++)
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{
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if (!HeapValidate(ProcessHeaps[Heap], 0, 0))
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{
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_snprintf(buf,
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sizeof(buf),
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"Heap corruption detected in heap 0x%p at line %d in %s.\n",
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ProcessHeaps[Heap],
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dwLine,
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fName);
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id = MessageBox(NULL,
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buf,
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"WinDbg Error",
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MB_YESNO | MB_ICONHAND | MB_TASKMODAL | MB_SETFOREGROUND);
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OutputDebugString(buf);
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OutputDebugString("\n\r");
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if (id != IDYES)
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{
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DebugBreak();
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}
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}
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}
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}
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} |