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参考链接1: http://blog.csdn.net/dizuo/article/details/6030676
今天在QT_VP中简单地添加了内存泄露检测语句: _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF ); 结果出来一大堆的内存泄露,着实吓了一跳,跟踪了一天,逐段派出,最后还是感觉没问题(还是比较自信代码质量的O(∩_∩)O哈哈~)。。。最后上网一查,在vs中,先是进行内存泄露报告,然后才卸载Qt的dll,释放申请的资源。所以才会出现这种情况。 |
#ifndef SET_DEBUG_NEW_H
#define SET_DEBUG_NEW_H
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)
#else
#define DEBUG_CLIENTBLOCK
#endif
#define _CRTDBG_MAP_ALLOC
#include <crtdbg.h>
#ifdef _DEBUG
#define new DEBUG_CLIENTBLOCK
#endif
#endif // end SET_DEBUG_NEW_H
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#include "test_memoryleak.h"
#include <QtGui>
#include "setdebugnew.h"
test_memoryLeak::test_memoryLeak(QWidget *parent, Qt::WFlags flags)
: QWidget(parent, flags)
{
btn1 = new QPushButton("test1", this);
btn2 = new QPushButton("close", this);
QWidget *memLeak_test = new QWidget;
connect(btn2, SIGNAL(clicked()), this, SLOT(close()));
QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(btn1);
layout->addWidget(btn2);
setLayout(layout);
}
test_memoryLeak::~test_memoryLeak()
{
}
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#include "test_memoryleak.h"
#include <QtGui/QApplication>
#include "setdebugnew.h"
int main(int argc, char *argv[])
{
#ifdef _DEBUG
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif
int *i = new int;
QApplication a(argc, argv);
test_memoryLeak w;
w.show();
return a.exec();
}
|
{1220} normal block at 0x016605F8, 552 bytes long.
Data: < f > 83 00 00 00 83 00 00 00 08 06 66 01 CD CD CD CD
{1215} normal block at 0x01660398, 292 bytes long.
Data: < eH f x=g> 94 85 A2 65 48 03 66 01 00 00 00 00 C4 78 3D 67
.\test_memoryleak.cpp(12) : {1214} client block at 0x01660348, subtype 0, 20 bytes long.
.
.
.
{289} normal block at 0x01388960, 56 bytes long.
Data: < 8 > 03 00 00 00 88 8A 38 01 00 CD CD CD 00 00 00 00
.\main.cpp(12) : {285} client block at 0x013872B0, subtype 0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
|
#include "test_memoryleak.h"
#include <QtGui/QApplication>
#ifdef _DEBUG
#include "vld.h"
#endif
#include "setdebugnew.h"
int main(int argc, char *argv[])
{
#ifdef _DEBUG
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif
int *i = new int;
QApplication a(argc, argv);
test_memoryLeak w;
w.show();
return a.exec();
}
|
WARNING: Visual Leak Detector detected memory leaks!
---------- Block 1 at 0x007F72B0: 4 bytes ----------
Call Stack:
c:\users\ajaxhe\desktop\program\qt\practice\test_memoryleak\test_memoryleak\main.cpp (17): test_memoryLeak.exe!main + 0x10 bytes
C:\Qt\4.7.4\src\winmain\qtmain_win.cpp (131): test_memoryLeak.exe!WinMain + 0x12 bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (578): test_memoryLeak.exe!__tmainCRTStartup + 0x35 bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (403): test_memoryLeak.exe!WinMainCRTStartup
0x76B9ED6C (File and line number not available): kernel32.dll!BaseThreadInitThunk + 0x12 bytes
0x77D1377B (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xEF bytes
0x77D1374E (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xC2 bytes
Data:
CD CD CD CD ........ ........
---------- Block 4 at 0x00CA0348: 20 bytes ----------
Call Stack:
c:\users\ajaxhe\desktop\program\qt\practice\test_memoryleak\test_memoryleak\test_memoryleak.cpp (12): test_memoryLeak.exe!test_memoryLeak::test_memoryLeak + 0x10 bytes
c:\users\ajaxhe\desktop\program\qt\practice\test_memoryleak\test_memoryleak\main.cpp (20): test_memoryLeak.exe!main + 0x17 bytes
C:\Qt\4.7.4\src\winmain\qtmain_win.cpp (131): test_memoryLeak.exe!WinMain + 0x12 bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (578): test_memoryLeak.exe!__tmainCRTStartup + 0x35 bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (403): test_memoryLeak.exe!WinMainCRTStartup
0x76B9ED6C (File and line number not available): kernel32.dll!BaseThreadInitThunk + 0x12 bytes
0x77D1377B (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xEF bytes
0x77D1374E (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xC2 bytes
Data:
04 7C FB 00 98 03 CA 00 E0 7B FB 00 00 00 CD CD .|...... .{......
50 04 CA 00 P....... ........
Visual Leak Detector detected 2 memory leaks (96 bytes).
Largest number used: 260 bytes.
Total allocations: 260 bytes.
Visual Leak Detector is now exiting.
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http://blog.csdn.net/itjobtxq/article/details/21785885
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原文地址:http://www.cnblogs.com/findumars/p/5574296.html