内存泄漏调试（2）——VLD

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目录

Visual Leak Detector（VLD）

Visual Leak Detector（VLD）是一款用于VC的免费开源的内存检测工具，通过内存检测生成相应的报告。
报告内容包括：发生内存泄漏的文件和行号；内存泄漏点的调用堆栈；内存泄漏的完整数据等。

调试过程

环境：VS2015 ， vld2.3
vld下载地址：http://vld.codeplex.com/

编译版本安装步骤如下：

1. 将vld安装的bin目录下的dbghelp.dll，Microsoft.DTfW.DHL.manifest，vld_x86.dll拷贝到运行的工程目录下（或是添加到环境变量），否则会出现“计算机丢失dbghelp.dll ”和“应用程序无法正常启动(0xc0150002)”的问题;
2. 在需要检测内存泄漏的代码文件里#include “vld.h”即可。

源文件安装：

直接下载vld的源程序，将对应的.h文件拷贝到VS的include目录下；将.lid文件拷贝到VS的lib目录下。

可以在安装好的vld目录下编辑vld.ini文件，修改ReportTo = both可以将内存泄漏的报告打印在文件中。

测试用例：

#include "vld.h"
int main() {
       int* p_int = new int(1234);
       char* p_char = new char('a');
       return 1;
}

在Debug模式下运行，内存泄漏报告

Visual Leak Detector Version 2.3 installed.
Outputting the report to the debugger and to E:wzcGittestleaktestleakmemory_leak_report.txt
WARNING: Visual Leak Detector detected memory leaks!
———- Block 59 at 0x003754D0: 40 bytes ———-
Call Stack:
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (359): testleak.exe!heap_alloc_dbg_internal + 0x12 bytes
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (450): testleak.exe!heap_alloc_dbg + 0x15 bytes
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (491): testleak.exe!_malloc_dbg + 0x15 bytes
d:thminkernelcrtsucrtsrcappcrtheapmalloc.cpp (18): testleak.exe!malloc + 0xF bytes
f:ddvctoolscrtvcstartupsrcheapnew_scalar.cpp (19): testleak.exe!operator new + 0x9 bytes
e:wzcgittestleaktestleaktest.cpp (15): testleak.exe!main + 0x7 bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (74): testleak.exe!invoke_main + 0x1B bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (264): testleak.exe!__scrt_common_main_seh + 0x5 bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (309): testleak.exe!__scrt_common_main
f:ddvctoolscrtvcstartupsrcstartupexe_main.cpp (17): testleak.exe!mainCRTStartup
0x77F1EE6C (File and line number not available): kernel32.dll!BaseThreadInitThunk + 0x12 bytes
0x77DC399B (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xEF bytes
0x77DC396E (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xC2 bytes
Data:
00 00 00 00 00 55 37 00 00 00 00 00 00 00 00 00 …..U7. ……..
01 00 00 00 04 00 00 00 3B 00 00 00 FD FD FD FD …….. ;…….
D2 04 00 00 FD FD FD FD …….. ……..

———- Block 60 at 0x00375500: 37 bytes ———-
Call Stack:
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (359): testleak.exe!heap_alloc_dbg_internal + 0x12 bytes
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (450): testleak.exe!heap_alloc_dbg + 0x15 bytes
d:thminkernelcrtsucrtsrcappcrtheapdebug_heap.cpp (491): testleak.exe!_malloc_dbg + 0x15 bytes
d:thminkernelcrtsucrtsrcappcrtheapmalloc.cpp (18): testleak.exe!malloc + 0xF bytes
f:ddvctoolscrtvcstartupsrcheapnew_scalar.cpp (19): testleak.exe!operator new + 0x9 bytes
e:wzcgittestleaktestleaktest.cpp (16): testleak.exe!main + 0x7 bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (74): testleak.exe!invoke_main + 0x1B bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (264): testleak.exe!__scrt_common_main_seh + 0x5 bytes
f:ddvctoolscrtvcstartupsrcstartupexe_common.inl (309): testleak.exe!__scrt_common_main
f:ddvctoolscrtvcstartupsrcstartupexe_main.cpp (17): testleak.exe!mainCRTStartup
0x77F1EE6C (File and line number not available): kernel32.dll!BaseThreadInitThunk + 0x12 bytes
0x77DC399B (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xEF bytes
0x77DC396E (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0xC2 bytes
Data:
D0 54 37 00 00 00 00 00 00 00 00 00 00 00 00 00 .T7….. ……..
01 00 00 00 01 00 00 00 3C 00 00 00 FD FD FD FD …….. <…….
61 FD FD FD FD a……. ……..

Visual Leak Detector detected 2 memory leaks (77 bytes).
Largest number used: 11554 bytes.
Total allocations: 16495 bytes.
Visual Leak Detector is now exiting.

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