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天天日报丨【Visual Leak Detector】配置项 ReportTo

来源:博客园

说明

使用 VLD 内存泄漏检测工具辅助开发时整理的学习笔记。本篇介绍 VLD 配置文件中配置项 ReportTo 的使用方法。同系列文章目录可见 《内存泄漏检测工具》目录

目录
  • 说明
  • 1. 配置文件使用说明
  • 2. 设置报告输出的位置
    • 2.1 测试代码
    • 2.2 ReportTo = debugger 时的输出
    • 2.3 ReportTo = file 时的输出
    • 2.4 ReportTo = both 时的输出
    • 2.5 输出结果对比

1. 配置文件使用说明

在程序中通过 #include "vld.h"的方式检测内存泄漏时,VLD 首先会尝试在程序的生成目录下读取 vld.ini文件,若未读取成功,则会尝试在 VLD 的安装目录下读取 vld.ini文件,若仍未读取成功,则会使用内置的默认配置,内置的默认配置如果不动源码是无法更改的,因此通过修改相应目录下的 vld.ini文件来定制 VLD 功能是最好的选择。当配置参数等号右边为空,或者给配置了不合法值时,在使用过程中会被程序重置到默认值。

2. 设置报告输出的位置

参数名ReportTo


(相关资料图)

有效赋值debuggerfileboth

默认值debugger

功能说明:设置泄漏检测报告的输出位置,输出到调试控制台(debugger)、输出到文件(file)、控制台和文件都输出(both),当报告可以输出到文件时,文件路径会使用 ReportFile指定的值(默认值为 .\memory_leak_report.txt)。

2.1 测试代码

#include #include "vld.h"void testFun(int i){    int *ptr = new int(i);    printf("ptr = %08x, *ptr = %08x.\n", ptr, *ptr);}int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    testFun(1);    return a.exec();}

测试环境:QT 5.9.2MSVC 2015 32bitDebug模式,VLD 版本为 2.5.1,VLD 配置文件只对该参数做修改,测试工程所在路径为:E:\Cworkspace\Qt 5.9\QtDemo\testVLD

2.2 ReportTo = debugger 时的输出

标准输出窗显示:

ptr = 00f57a30, *ptr = 00000001.

VLD 输出报告(控制台):

Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.iniVisual Leak Detector Version 2.5.1 installed.WARNING: Visual Leak Detector detected memory leaks!---------- Block 1 at 0x00F57A30: 4 bytes ----------  Leak Hash: 0x78A7E46A, Count: 1, Total 4 bytes  Call Stack (TID 23728):    ucrtbased.dll!malloc()    f:\dd\vctools\crt\vcstartup\src\heap\new_scalar.cpp (19): testVLD.exe!operator new() + 0x9 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (6): testVLD.exe!testFun() + 0x7 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (14): testVLD.exe!main() + 0x7 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (74): testVLD.exe!invoke_main() + 0x1B bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (264): testVLD.exe!__scrt_common_main_seh() + 0x5 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (309): testVLD.exe!__scrt_common_main()    f:\dd\vctools\crt\vcstartup\src\startup\exe_main.cpp (17): testVLD.exe!mainCRTStartup()    KERNEL32.DLL!BaseThreadInitThunk() + 0x19 bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0x11E bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0xEE bytes  Data:    01 00 00 00                                                  ........ ........Visual Leak Detector detected 1 memory leak (40 bytes).Largest number used: 40 bytes.Total allocations: 40 bytes.Visual Leak Detector is now exiting.

2.3 ReportTo = file 时的输出

标准输出窗显示:

ptr = 01059490, *ptr = 00000001.

VLD 输出报告(控制台):

Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.ini

VLD 输出报告(文件 memory_leak_report.txt):

Visual Leak Detector Version 2.5.1 installed.    Outputting the report to E:\Cworkspace\Qt 5.9\QtDemo\build-testVLD-Desktop_Qt_5_9_2_MSVC2015_32bit-Debug\memory_leak_report.txtWARNING: Visual Leak Detector detected memory leaks!---------- Block 1 at 0x01059490: 4 bytes ----------  Leak Hash: 0x78A7E46A, Count: 1, Total 4 bytes  Call Stack (TID 15680):    ucrtbased.dll!malloc()    f:\dd\vctools\crt\vcstartup\src\heap\new_scalar.cpp (19): testVLD.exe!operator new() + 0x9 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (6): testVLD.exe!testFun() + 0x7 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (14): testVLD.exe!main() + 0x7 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (74): testVLD.exe!invoke_main() + 0x1B bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (264): testVLD.exe!__scrt_common_main_seh() + 0x5 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (309): testVLD.exe!__scrt_common_main()    f:\dd\vctools\crt\vcstartup\src\startup\exe_main.cpp (17): testVLD.exe!mainCRTStartup()    KERNEL32.DLL!BaseThreadInitThunk() + 0x19 bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0x11E bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0xEE bytes  Data:    01 00 00 00                                                  ........ ........Visual Leak Detector detected 1 memory leak (40 bytes).Largest number used: 40 bytes.Total allocations: 40 bytes.Visual Leak Detector is now exiting.

2.4 ReportTo = both 时的输出

标准输出窗显示:

ptr = 00ebb038, *ptr = 00000001.

VLD 输出报告(控制台):

Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.iniVisual Leak Detector Version 2.5.1 installed.    Outputting the report to the debugger and to E:\Cworkspace\Qt 5.9\QtDemo\build-testVLD-Desktop_Qt_5_9_2_MSVC2015_32bit-Debug\memory_leak_report.txtWARNING: Visual Leak Detector detected memory leaks!---------- Block 1 at 0x00EBB038: 4 bytes ----------  Leak Hash: 0x78A7E46A, Count: 1, Total 4 bytes  Call Stack (TID 13352):    ucrtbased.dll!malloc()    f:\dd\vctools\crt\vcstartup\src\heap\new_scalar.cpp (19): testVLD.exe!operator new() + 0x9 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (6): testVLD.exe!testFun() + 0x7 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (14): testVLD.exe!main() + 0x7 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (74): testVLD.exe!invoke_main() + 0x1B bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (264): testVLD.exe!__scrt_common_main_seh() + 0x5 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (309): testVLD.exe!__scrt_common_main()    f:\dd\vctools\crt\vcstartup\src\startup\exe_main.cpp (17): testVLD.exe!mainCRTStartup()    KERNEL32.DLL!BaseThreadInitThunk() + 0x19 bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0x11E bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0xEE bytes  Data:    01 00 00 00                                                  ........ ........Visual Leak Detector detected 1 memory leak (40 bytes).Largest number used: 40 bytes.Total allocations: 40 bytes.Visual Leak Detector is now exiting.

VLD 输出报告(文件 memory_leak_report.txt):

Visual Leak Detector Version 2.5.1 installed.    Outputting the report to the debugger and to E:\Cworkspace\Qt 5.9\QtDemo\build-testVLD-Desktop_Qt_5_9_2_MSVC2015_32bit-Debug\memory_leak_report.txtWARNING: Visual Leak Detector detected memory leaks!---------- Block 1 at 0x00EBB038: 4 bytes ----------  Leak Hash: 0x78A7E46A, Count: 1, Total 4 bytes  Call Stack (TID 13352):    ucrtbased.dll!malloc()    f:\dd\vctools\crt\vcstartup\src\heap\new_scalar.cpp (19): testVLD.exe!operator new() + 0x9 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (6): testVLD.exe!testFun() + 0x7 bytes    e:\cworkspace\qt 5.9\qtdemo\testvld\main.cpp (14): testVLD.exe!main() + 0x7 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (74): testVLD.exe!invoke_main() + 0x1B bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (264): testVLD.exe!__scrt_common_main_seh() + 0x5 bytes    f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl (309): testVLD.exe!__scrt_common_main()    f:\dd\vctools\crt\vcstartup\src\startup\exe_main.cpp (17): testVLD.exe!mainCRTStartup()    KERNEL32.DLL!BaseThreadInitThunk() + 0x19 bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0x11E bytes    ntdll.dll!RtlGetAppContainerNamedObjectPath() + 0xEE bytes  Data:    01 00 00 00                                                  ........ ........Visual Leak Detector detected 1 memory leak (40 bytes).Largest number used: 40 bytes.Total allocations: 40 bytes.Visual Leak Detector is now exiting.

2.5 输出结果对比

  • ReportTo = debugger时,泄漏报告只会输出到调试控制台中。
  • ReportTo = file时,泄漏报告只会输出到指定文件中,控制台只打印配置文件读取情况。
  • ReportTo = both时,泄漏报告同时输出到调试控制台与指定文件中,文件中除了第一行没有输出配置文件读取情况外,其他地方与调试控制台的输出保持一致。

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