memory leak

simplehappy

#define _CRTDBG_MAP_ALLOC  
#include  <stdlib.h>  

#include  <crtdbg.h>  

下面的语句放在主函数开头，就不用每个出口都写上_CrtDumpMemoryLeaks(); 了

#ifdef _DEBUG
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF| _CRTDBG_LEAK_CHECK_DF);
#endif
 
how to:dbghelp, dr.watson
如何捕捉程序异常
使用dbghelp获取调用堆栈
 
#include <windows.h>#include <stdio.h>#include <dbghelp.h>#pragma comment( lib, "dbghelp.lib" )void dump_callstack( CONTEXT *context ){STACKFRAME sf;memset( &sf, 0, sizeof( STACKFRAME ) );sf.AddrPC.Offset = context->Eip;sf.AddrPC.Mode = AddrModeFlat;sf.AddrStack.Offset = context->Esp;sf.AddrStack.Mode = AddrModeFlat;sf.AddrFrame.Offset = context->Ebp;sf.AddrFrame.Mode = AddrModeFlat;DWORD machineType = IMAGE_FILE_MACHINE_I386;HANDLE hProcess = GetCurrentProcess();HANDLE hThread = GetCurrentThread();for( ; ; ){if( !StackWalk(machineType, hProcess, hThread, &sf, context, 0, SymFunctionTableAccess, SymGetModuleBase, 0 ) ){break;}if( sf.AddrFrame.Offset == 0 ){break;}BYTE symbolBuffer[ sizeof( SYMBOL_INFO ) + 1024 ];PSYMBOL_INFO pSymbol = ( PSYMBOL_INFO ) symbolBuffer;pSymbol->SizeOfStruct = sizeof( symbolBuffer );pSymbol->MaxNameLen = 1024;DWORD64 symDisplacement = 0;if( SymFromAddr( hProcess, sf.AddrPC.Offset, 0, pSymbol ) ){printf( "Function : %s\n", pSymbol->Name );}else{printf( "SymFromAdd failed!\n" );}IMAGEHLP_LINE lineInfo = { sizeof(IMAGEHLP_LINE) };DWORD dwLineDisplacement;if( SymGetLineFromAddr( hProcess, sf.AddrPC.Offset, &dwLineDisplacement, &lineInfo ) ){printf( "[Source File : %s]\n", lineInfo.FileName ); printf( "[Source Line : %u]\n", lineInfo.LineNumber ); }else{printf( "SymGetLineFromAddr failed!\n" );}}}DWORD excep_filter( LPEXCEPTION_POINTERS lpEP ){/**//// init dbghelp.dllif( SymInitialize( GetCurrentProcess(), NULL, TRUE ) ){printf( "Init dbghelp ok.\n" );}dump_callstack( lpEP->ContextRecord );if( SymCleanup( GetCurrentProcess() ) ){printf( "Cleanup dbghelp ok.\n" );}return EXCEPTION_EXECUTE_HANDLER;}void func1( int i ){int *p = 0;*p = i;}void func2( int i ){func1( i - 1 );}void func3( int i ){func2( i - 1 );}void test( int i ){func3( i - 1 );}int main(){__try{test( 10 );}__except( excep_filter( GetExceptionInformation() ) ){printf( "Some exception occures.\n" );}return 0;} 执行结果
Init dbghelp ok.
Function : func1
[Source File : g:\tmp\test_mem_leak\test_getexceptioninformation\test.cpp]
[Source Line : 87]
Function : func2
[Source File : g:\tmp\test_mem_leak\test_getexceptioninformation\test.cpp]
[Source Line : 92]
Function : func3
[Source File : g:\tmp\test_mem_leak\test_getexceptioninformation\test.cpp]
[Source Line : 97]
Function : test
[Source File : g:\tmp\test_mem_leak\test_getexceptioninformation\test.cpp]
[Source Line : 102]
Function : main
[Source File : g:\tmp\test_mem_leak\test_getexceptioninformation\test.cpp]
[Source Line : 109]
Function : __tmainCRTStartup
[Source File : f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c]
[Source Line : 582]
Function : mainCRTStartup
[Source File : f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c]
[Source Line : 399]
Function : RegisterWaitForInputIdle
SymGetLineFromAddr failed!
Cleanup dbghelp ok.
Some exception occures.