subject_58921.htm

vc

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序号：58921 发表者：金枪鱼 发表日期：2003-11-04 22:17:05
<br>主题：PostQuitMesaage出现内存泄漏
<br>内容：SDI程序，分割成3各视，有一个视为CFormView类型，其中有一些组合框控件，其数据从数据库中装载。<BR>如果组合框数据装载失败，我需要程序退出。装载成功时，一切工作正常。<BR>但如果装载失败，我PostQuitMessage(0);程序倒是退出了，却告诉我内存泄漏！如下：<BR>－－－－－－－－－－－－－－－<BR>Warning: destroying CSingleDocTemplate with live document.<BR>Detected memory leaks!<BR>Dumping objects -&gt;<BR>{664} normal block at 0x003797A8, 532 bytes long.<BR> Data: &lt;(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &gt; 28 F9 15 00 D4 01 00 00 3C 00 00 00 00 00 00 00 <BR>{656} normal block at 0x00377BF0, 23 bytes long.<BR> Data: &lt;&nbsp;&nbsp;2|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&gt; D8 9C 32 7C 06 00 00 00 06 00 00 00 01 00 00 00 <BR>plex.cpp(32) : {650} normal block at 0x003774B8, 124 bytes long.<BR> Data: &lt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; z7 &gt; 00 00 00 00 00 00 00 00 00 00 00 00 0C 7A 37 00 <BR>{646} normal block at 0x00376DC0, 30 bytes long.<BR> Data: &lt;&nbsp;&nbsp;2|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&gt; D8 9C 32 7C 0D 00 00 00 0D 00 00 00 01 00 00 00 <BR>{645} client block at 0x003772B0, subtype c0, 260 bytes long.<BR>a CABListView object at $003772B0, 260 bytes long<BR>{639} client block at 0x00376EE0, subtype c0, 916 bytes long.<BR>a CABQueryFormView object at $00376EE0, 916 bytes long<BR>plex.cpp(32) : {635} normal block at 0x00376E28, 124 bytes long.<BR> Data: &lt;&nbsp;&nbsp;&nbsp;&nbsp;8n7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;k7 &gt; 00 00 00 00 38 6E 37 00 00 00 00 00 80 6B 37 00 <BR>{631} client block at 0x00376B80, subtype c0, 364 bytes long.<BR>a CABAdFormView object at $00376B80, 364 bytes long<BR>{630} normal block at 0x00377D78, 36 bytes long.<BR> Data: &lt;Q&nbsp;&nbsp; Q&nbsp;&nbsp; Q&nbsp;&nbsp; |&nbsp;&nbsp; &gt; 51 00 00 00 51 00 00 00 51 00 00 00 7C 00 00 00 <BR>{629} normal block at 0x00376038, 12 bytes long.<BR> Data: &lt;&nbsp;&nbsp;&nbsp;&nbsp;d&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &gt; 00 00 00 00 64 00 00 00 1C 03 00 00 <BR>{625} normal block at 0x00377C88, 28 bytes long.<BR> Data: &lt;&nbsp;&nbsp;2|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&gt; D8 9C 32 7C 0B 00 00 00 0B 00 00 00 01 00 00 00 <BR>f:\myvc7projects\...\...\mainfrm.cpp(22) : {622} client block at 0x00377938, subtype c0, 636 bytes long.<BR>a CMainFrame object at $00377938, 636 bytes long<BR>f:\myvc7projects\...\...\....cpp(16) : {621} client block at 0x003778A8, subtype c0, 84 bytes long.<BR>a C....Doc object at $003778A8, 84 bytes long<BR>Object dump complete.<BR>线程 '$E2' (0xaf0) 已退出，返回值为 0 (0x0)。<BR>－－－－－－－－－－－－－－－－<BR>我的程序基本上用不到其中的文档类(所以没有与分视关联)，似乎也没有什么动态分配的指针，并且我在ExitInstance函数中处理了我需要销毁和释放全局资源。我没有弄明白怎么会内存泄漏，是不是PostQuitMessage函数会跳过一些处理，请高手指点！
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回复者：xiongli 回复日期：2003-11-04 23:37:23
<br>内容：这个不是你的postquitmessage引起的吧<BR>内存泄漏都是在程序结束后才dump出来的<BR>你postquitmessage后，程序就结束，然后就dump，这是很自然的阿<BR>跟postquitmessage没什么关系<BR>并不是说是postquitmessage导致memory leak<BR><BR>内存泄漏是个整体概念。是指程序申请了多少，最后就要释放多少。程序到地释放了没有，是程序退出时才知道的，不是程序运行时才知道的。当然，如果程序退出后，发现有内存泄漏，这个泄漏必然是程序运行时导致的。<BR><BR>注意看plex.cpp(32)<BR>表示plex.cpp中32行申请的内存没有得到释放，你自己检查检查
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回复者：金枪鱼 回复日期：2003-11-05 00:06:13
<br>内容：我的程序中没有plex.cpp这个文件啊！<BR>而且我不用PostQuitMessage，它就不出现内存泄漏。<BR>2003-11-5 0:12:14