内存泄漏,无法找到源

Question

我有一个很大的内存泄漏,我需要一些帮助来找出它来自哪里.首先,关于代码的一些理论:

这是一个Kinect项目.它是在MS Visual Studio 2012中构建的MFC项目,它使用Direct2D将图像放在屏幕上.当我从Kinect 1切换到Kinect 2时会发生此问题.然后重建除"主"对象之外的每个对象(解构/释放并置为NULL(如果指针)).这包括:

• 所有Direct2D对象(工厂,Rendertargets,位图,画笔,一切)
• 带线程的Kinect facetracker
• 带线程的kinect对象.

对于每个新关键字,我在析构函数中使用了delete关键字(所以我没有做任何事情来破坏那些没有用new初始化的指针).我关闭了所有线程处理程序并将它们设置为NULL.

现在我有内存泄漏,我需要一些帮助找到它.我开始使用MS MFC工具

初始化后我有一些输出:

Dumping objects ->
{402} normal block at 0x1531E8F0, 28 bytes long.
 Data: <<       @       > 3C 07 06 00 F0 00 00 00 40 01 00 00 00 05 00 00 
{401} normal block at 0x152F6CD8, 96 bytes long.
 Data: <    >           > 00 CD CD CD 3E 07 06 00 D0 04 00 00 D8 17 00 00 
{400} normal block at 0x03EA0040, 1229064 bytes long.
 Data: <R            E, > 52 07 06 00 B8 A9 13 00 D0 87 D0 00 18 45 2C 15 
{396} normal block at 0x152C9EA0, 20 bytes long.
 Data: <                > 80 F9 89 00 01 00 00 00 01 00 00 00 01 00 00 00 
c:\users\work\documents\github\kinectmain\testmfc\main.cpp(148) : {305} client block at 0x152CF618, subtype c0, 8 bytes long.
a CFont object at $152CF618, 8 bytes long
{295} normal block at 0x152CFC20, 24 bytes long.
 Data: <X   ( , X       > 58 07 CC 00 28 F8 2C 15 58 07 CC 00 00 00 CD CD 
{284} normal block at 0x152CF828, 24 bytes long.
 Data: <X   X     ,     > 58 07 CC 00 58 07 CC 00 20 FC 2C 15 01 00 CD CD 
{206} normal block at 0x00CD0588, 12 bytes long.
 Data: <    @       > B0 04 CD 00 40 05 CD 00 B8 A9 13 00 
{205} normal block at 0x00CD0540, 12 bytes long.
 Data: <            > 88 05 CD 00 B0 04 CD 00 18 BE 13 00 
{204} normal block at 0x00CD04F8, 8 bytes long.
 Data: <        > EC F3 89 00 00 00 00 00 
{203} normal block at 0x00CD04B0, 12 bytes long.
 Data: <@           > 40 05 CD 00 88 05 CD 00 CD CD CD CD 
{202} normal block at 0x00CD0468, 12 bytes long.
 Data: <    H       > 08 FE CC 00 48 A5 CC 00 18 BE 13 00 
{201} normal block at 0x00CCFE08, 12 bytes long.
 Data: <H   h       > 48 A5 CC 00 68 04 CD 00 B8 A9 13 00 
{200} normal block at 0x00CCA590, 8 bytes long.
 Data: <        > FC A4 CC 00 00 00 00 00 
{199} normal block at 0x00CCA548, 12 bytes long.
 Data: <h           > 68 04 CD 00 08 FE CC 00 CD CD CD CD 
c:\users\work\documents\github\kinectmain\testmfc\main.cpp(163) : {198} normal block at 0x00CCA4F8, 16 bytes long.
 Data: <R       H       > 52 07 06 00 90 A5 CC 00 48 A5 CC 00 02 00 00 00 
{188} normal block at 0x00CC07B0, 8 bytes long.
 Data: <        > 9C FB A1 00 00 00 00 00 
{187} normal block at 0x00CC0758, 24 bytes long.
 Data: <( , ( ,   ,     > 28 F8 2C 15 28 F8 2C 15 20 FC 2C 15 01 01 CD CD 
Object dump complete.
0 bytes in 0 Free Blocks.
1229392 bytes in 17 Normal Blocks.
13498 bytes in 73 CRT Blocks.
0 bytes in 0 Ignore Blocks.
8 bytes in 1 Client Blocks.
Largest number used: 1245916 bytes.
Total allocations: 2504946 bytes.

并且在kinect开关之后:

Dumping objects ->
{961} normal block at 0x1531E8F0, 28 bytes long.
 Data: <<       @       > 3C 07 06 00 F0 00 00 00 40 01 00 00 00 05 00 00 
{960} normal block at 0x1534A658, 96 bytes long.
 Data: <    >   p       > 00 CD CD CD 3E 07 06 00 70 05 00 00 A8 15 00 00 
{959} normal block at 0x03EA0040, 1229064 bytes long.
 Data: <R         ,   4 > 52 07 06 00 18 BE 13 00 90 F1 2C 15 98 9B 34 15 
{956} normal block at 0x152CBFD0, 20 bytes long.
 Data: <                > 80 F9 89 00 01 00 00 00 01 00 00 00 01 00 00 00 
c:\users\work\documents\github\kinectmain\testmfc\main.cpp(148) : {305} client block at 0x152CF618, subtype c0, 8 bytes long.
a CFont object at $152CF618, 8 bytes long
{295} normal block at 0x152CFC20, 24 bytes long.
 Data: <X   ( , X       > 58 07 CC 00 28 F8 2C 15 58 07 CC 00 00 00 CD CD 
{284} normal block at 0x152CF828, 24 bytes long.
 Data: <X   X     ,     > 58 07 CC 00 58 07 CC 00 20 FC 2C 15 01 00 CD CD 
{206} normal block at 0x00CD0588, 12 bytes long.
 Data: <    @       > B0 04 CD 00 40 05 CD 00 B8 A9 13 00 
{205} normal block at 0x00CD0540, 12 bytes long.
 Data: <            > 88 05 CD 00 B0 04 CD 00 18 BE 13 00 
{204} normal block at 0x00CD04F8, 8 bytes long.
 Data: <        > EC F3 89 00 00 00 00 00 
{203} normal block at 0x00CD04B0, 12 bytes long.
 Data: <@           > 40 05 CD 00 88 05 CD 00 CD CD CD CD 
{202} normal block at 0x00CD0468, 12 bytes long.
 Data: <    H       > 08 FE CC 00 48 A5 CC 00 18 BE 13 00 
{201} normal block at 0x00CCFE08, 12 bytes long.
 Data: <H   h       > 48 A5 CC 00 68 04 CD 00 B8 A9 13 00 
{200} normal block at 0x00CCA590, 8 bytes long.
 Data: <        > FC A4 CC 00 00 00 00 00 
{199} normal block at 0x00CCA548, 12 bytes long.
 Data: <h           > 68 04 CD 00 08 FE CC 00 CD CD CD CD 
c:\users\work\documents\github\kinectmain\testmfc\main.cpp(163) : {198} normal block at 0x00CCA4F8, 16 bytes long.
 Data: <R       H       > 52 07 06 00 90 A5 CC 00 48 A5 CC 00 02 00 00 00 
{188} normal block at 0x00CC07B0, 8 bytes long.
 Data: <        > 9C FB A1 00 00 00 00 00 
{187} normal block at 0x00CC0758, 24 bytes long.
 Data: <( , ( ,   ,     > 28 F8 2C 15 28 F8 2C 15 20 FC 2C 15 01 01 CD CD 
Object dump complete.
0 bytes in 0 Free Blocks.
1229392 bytes in 17 Normal Blocks.
13498 bytes in 73 CRT Blocks.
0 bytes in 0 Ignore Blocks.
8 bytes in 1 Client Blocks.
Largest number used: 1245916 bytes.
Total allocations: 3742634 bytes.

因此总分配从2504946字节增加到3742634字节,但没有其他变化.

此外,每个开关我都会收到以下错误:

calling DestroyWindow in CWnd::~CWnd; OnDestroy or PostNcDestroy in derived class will not be called.

即使我没有在程序关闭之前调用destroyWindow.

完整的源代码可以在这里找到:https://github.com/ProjectPrague/KinectMain/tree/Bugfixing-Branch

关于可能是什么原因或者我可以用什么工具找到原因的任何提示,建议或提示都会很棒.

Answer 1

{}括号中的数字是分配订单号.如果你的程序是完全确定的并且每次都完全相同,那么这些数字应该从一次运行到下一次运行保持不变.

在这种情况下,你可以使用这个技巧.将以下代码添加到main函数的顶部:

long lBreakAlloc = 0;
if ( lBreakAlloc > 0 )
{
    _CrtSetBreakAlloc( lBreakAlloc );
}

然后在该if语句上设置断点并启动程序.当它停在时if,更改值lBreakAlloc以匹配第一个泄漏内存块的分配顺序号,然后让程序继续.

当它到达分配那块内存的点时,嘿presto!它将在调试器中停止,您可以确切地看到未释放哪个分配.