LeakDiag使用手记

原文地址：http://www.cppblog.com/sandy/archive/2008/08/18/59260.html

由于测试自己写的程序发现没调用一次，就会多出几个句柄，果断要去查一查是不是内存泄露。不过还没有研究透，先记下来吧！

LeakDiag是微软一款检测memory leak的工具，使用比较简单

首先去下载一个 ftp://ftp.microsoft.com/PSS/Tools/Developer%20Support%20Tools/LeakDiag/

安装好，默认是在c:\leakdiag



然后写一个测试程序来测试

#include <stdio.h>
#include <windows.h>

int main()
{
     while(1)
    {
         char *c =  new  char[10];
        printf("%s",c);
        Sleep(1000);
    }
     return 0;
}

在LeakDiag中选择aaa.exe
然后选择Windows Heap Allocator来跟踪heap的使用，按start开始，等一会按log，然后再stop
会在c:\leakdiag\Logs下面生成一个log

关键的部分是

< LEAKS  ver ="1.25.28.2201" >
< STACK  numallocs ="05"  size ="048"  totalsize ="0240" >
< STACKSTATS >
< SIZESTAT  size ="048"  numallocs ="05" />
< HEAPSTAT  handle ="340000"  numallocs ="05" />
</ STACKSTATS >
< FRAME  num ="0"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x407a72"  offset ="0x00007A72"   />
< FRAME  num ="1"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x402ff2"  offset ="0x00002FF2"   />
< FRAME  num ="2"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x402df9"  offset ="0x00002DF9"   />
< FRAME  num ="3"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x402dd6"  offset ="0x00002DD6"   />
< FRAME  num ="4"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x40112f"  offset ="0x0000112F"   />
< FRAME  num ="5"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x401038"  offset ="0x00001038"   />
< FRAME  num ="6"  dll ="aaa.exe"  function =""  filename =""  line =""  addr ="0x401269"  offset ="0x00001269"   />
< FRAME  num ="7"  dll ="KERNEL32.dll"  function  ="GetSortTablesFileInfo"  offset ="0xC"  filename =""  line =""  addr ="0x7C5989D5"   />
< STACKID >00524008 </ STACKID >
</ STACK >
</ LEAKS >

其中numallocs是分配的次数,size是每次分配的大小，frame则是leak的时候的call stack
这里的stack只显示了binary,是因为symbol没有配好

把对应的pdb文件路径加到[Tools]-[Option]-Symbol search path，就能得到

< LEAKS  ver ="1.25.28.2201" >
< STACK  numallocs ="06"  size ="048"  totalsize ="0288" >
< STACKSTATS >
< SIZESTAT  size ="048"  numallocs ="06" />
< HEAPSTAT  handle ="340000"  numallocs ="06" />
</ STACKSTATS >
< FRAME  num ="0"  dll ="aaa.exe"  function  ="_heap_alloc_base"  offset ="0xC2"  filename ="malloc.c"  line ="200"  addr ="0x407A72"   />
< FRAME  num ="1"  dll ="aaa.exe"  function  ="_heap_alloc_dbg"  offset ="0x1A2"  filename ="dbgheap.c"  line ="378"  addr ="0x402FF2"   />
< FRAME  num ="2"  dll ="aaa.exe"  function  ="_nh_malloc_dbg"  offset ="0x19"  filename ="dbgheap.c"  line ="248"  addr ="0x402DF9"   />
< FRAME  num ="3"  dll ="aaa.exe"  function  ="_nh_malloc"  offset ="0x16"  filename ="dbgheap.c"  line ="197"  addr ="0x402DD6"   />
< FRAME  num ="4"  dll ="aaa.exe"  function  ="operator new"  offset ="0xF"  filename ="new.cpp"  line ="24"  addr ="0x40112F"   />
< FRAME  num ="5"  dll ="aaa.exe"  function  ="main"  offset ="0x28"  filename ="D:\Test\aaa\test.cpp"  line ="8"  addr ="0x401038"   />
< FRAME  num ="6"  dll ="aaa.exe"  function  ="mainCRTStartup"  offset ="0xE9"  filename ="crt0.c"  line ="206"  addr ="0x401269"   />
< STACKID >00524008 </ STACKID >
</ STACK >
</ LEAKS >

由test.cpp line 8引起的memory leak.

BTW: 据说有一个tool叫LDParser来分析leakdiag生成的log,哪位大侠有，希望提供一下，谢谢！