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/* Project nGen
John DiCamillo
Copyright © 1997-2001. All Rights Reserved.
SUBSYSTEM: foundation
FILE: MemDebug.cpp
AUTHOR: John DiCamillo
OVERVIEW
========
Memory Debugging class
*/
#include "MemDebug.h"
#include <stdio.h>
#include <string.h>
#include <crtdbg.h>
#include <malloc.h>
// +--------------------------------------------------------------------+
static Memory::LEVEL mem_chk_level = Memory::PERIODIC;
#ifdef _DEBUG
static _CrtMemState mem_chk_p1,
mem_chk_p2;
#endif
static HANDLE mem_log_file = 0;
// +--------------------------------------------------------------------+
#ifdef _DEBUG
#define CrtSetDebugField(a) _CrtSetDbgFlag((a) | _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG))
#define CrtClrDebugField(a) _CrtSetDbgFlag(~(a) & _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG))
#endif
static void heapdump()
{
_HEAPINFO hinfo;
int heapstatus;
DWORD used = 0;
DWORD avail = 0;
char report[256];
hinfo._pentry = NULL;
while ((heapstatus = _heapwalk( &hinfo )) == _HEAPOK) {
sprintf_s(report, "%6s block at %Fp of size %4.4X\n",
( hinfo._useflag == _USEDENTRY ? "USED" : "FREE" ),
hinfo._pentry, hinfo._size);
_RPT0(_CRT_WARN, report);
if (hinfo._useflag == _USEDENTRY)
used += hinfo._size;
else
avail += hinfo._size;
}
sprintf_s(report, "------\nUsed Blocks: %d\nAvail Blocks: %d\nTotal Blocks: %d\n", used, avail, used+avail);
_RPT0(_CRT_WARN, report);
switch (heapstatus) {
case _HEAPEMPTY:
_RPT0(_CRT_WARN, "OK - empty heap\n" );
break;
case _HEAPEND:
_RPT0(_CRT_WARN, "OK - end of heap\n" );
break;
case _HEAPBADPTR:
_RPT0(_CRT_WARN, "ERROR - bad pointer to heap\n" );
break;
case _HEAPBADBEGIN:
_RPT0(_CRT_WARN, "ERROR - bad start of heap\n" );
break;
case _HEAPBADNODE:
_RPT0(_CRT_WARN, "ERROR - bad node in heap\n" );
break;
}
}
// +--------------------------------------------------------------------+
void
Memory::OpenLog(const char* filename)
{
#ifdef _DEBUG
if (!filename || !strlen(filename))
filename = "memdbg.txt";
mem_log_file = CreateFile(filename, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, 0, 0);
if (mem_log_file) {
_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
_CrtSetReportFile(_CRT_WARN, mem_log_file);
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
_CrtSetReportFile(_CRT_ERROR, mem_log_file);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
_CrtSetReportFile(_CRT_ASSERT, mem_log_file);
}
_CrtMemCheckpoint(&mem_chk_p1);
#endif
}
// +--------------------------------------------------------------------+
void
Memory::CloseLog()
{
#ifdef _DEBUG
if (mem_log_file) {
CloseHandle(mem_log_file);
mem_log_file = 0;
_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDOUT);
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDOUT);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDOUT);
}
#endif
}
// +--------------------------------------------------------------------+
void
Memory::Check()
{
#ifdef _DEBUG
if (! _CrtCheckMemory()) {
_RPT0(_CRT_ERROR, "\n\nMemory Check Failed.\n");
heapdump();
Checkpoint();
_asm { int 3 }
exit(1111);
}
#endif
}
// +--------------------------------------------------------------------+
void
Memory::Checkpoint()
{
#ifdef _DEBUG
if (mem_chk_level < PERIODIC) return;
_RPT0(_CRT_WARN, "\n\nMemory Checkpoint:\n"
"--------------------------------------------------\n");
_CrtMemState s;
_CrtMemCheckpoint(&mem_chk_p2);
_CrtMemDifference(&s, &mem_chk_p1, &mem_chk_p2);
_CrtMemDumpStatistics(&s);
memcpy(&mem_chk_p1, &mem_chk_p2, sizeof(mem_chk_p1));
#endif
}
// +--------------------------------------------------------------------+
void
Memory::Stats()
{
#ifdef _DEBUG
if (mem_chk_level < PERIODIC) return;
_RPT0(_CRT_WARN, "\n\nMemory Stats:\n"
"--------------------------------------------------\n");
_CrtMemState s;
_CrtMemCheckpoint(&s);
_CrtMemDumpStatistics(&s);
#endif
}
// +--------------------------------------------------------------------+
void
Memory::DumpLeaks()
{
#ifdef _DEBUG
_RPT0(_CRT_WARN, "\n\nMemory Dump Leaks:\n"
"--------------------------------------------------\n");
_CrtDumpMemoryLeaks();
#endif
}
// +--------------------------------------------------------------------+
void
Memory::SetLevel(LEVEL l)
{
#ifdef _DEBUG
mem_chk_level = l;
_CrtSetDbgFlag(0);
switch (mem_chk_level) {
case MAXIMAL: CrtSetDebugField(_CRTDBG_CHECK_ALWAYS_DF);
case PERIODIC: CrtSetDebugField(_CRTDBG_DELAY_FREE_MEM_DF);
case LEAKS: CrtSetDebugField(_CRTDBG_LEAK_CHECK_DF);
case OFF:
default: break;
}
#endif
}
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