說明
使用 VLD 記憶體泄漏檢測工具輔助開發時整理的學習筆記,本篇介紹 VLD 組態檔中配置項 ReportTo 的使用方法,同系列文章目錄可見 《記憶體泄漏檢測工具》目錄
目錄- 說明
- 1. 組態檔使用說明
- 2. 設定報告輸出的位置
- 2.1 測驗代碼
- 2.2 ReportTo = debugger 時的輸出
- 2.3 ReportTo = file 時的輸出
- 2.4 ReportTo = both 時的輸出
- 2.5 輸出結果對比
1. 組態檔使用說明
在程式中通過 #include "vld.h" 的方式檢測記憶體泄漏時,VLD 首先會嘗試在程式的生成目錄下讀取 vld.ini 檔案,若未讀取成功,則會嘗試在 VLD 的安裝目錄下讀取 vld.ini 檔案,若仍未讀取成功,則會使用內置的默認配置,內置的默認配置如果不動原始碼是無法更改的,因此通過修改相應目錄下的 vld.ini 檔案來定制 VLD 功能是最好的選擇,當配置引數等號右邊為空,或者給配置了不合法值時,在使用程序中會被程式重置到默認值,
2. 設定報告輸出的位置
引數名:ReportTo,
有效賦值:debugger,file,both,
默認值:debugger,
功能說明:設定泄漏檢測報告的輸出位置,輸出到除錯控制臺(debugger)、輸出到檔案(file)、控制臺和檔案都輸出(both),當報告可以輸出到檔案時,檔案路徑會使用 ReportFile 指定的值(默認值為 .\memory_leak_report.txt),
2.1 測驗代碼
#include <QCoreApplication>
#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();
}
測驗環境:QT 5.9.2,MSVC 2015 32bit,Debug 模式,VLD 版本為 2.5.1,VLD 組態檔只對該引數做修改,測驗工程所在路徑為:E:\Cworkspace\Qt 5.9\QtDemo\testVLD,
2.2 ReportTo = debugger 時的輸出
標準輸出窗顯示:
ptr = 00f57a30, *ptr = 00000001.
VLD 輸出報告(控制臺):
Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.ini
Visual 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 時的輸出
標準輸出窗顯示:
ptr = 01059490, *ptr = 00000001.
VLD 輸出報告(控制臺):
Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.ini
VLD 輸出報告(檔案 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.txt
WARNING: 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 時的輸出
標準輸出窗顯示:
ptr = 00ebb038, *ptr = 00000001.
VLD 輸出報告(控制臺):
Visual Leak Detector read settings from: D:\Program Files (x86)\Visual Leak Detector\vld.ini
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.txt
WARNING: 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 輸出報告(檔案 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.txt
WARNING: 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 輸出結果對比
- 當
ReportTo = debugger時,泄漏報告只會輸出到除錯控制臺中, - 當
ReportTo = file時,泄漏報告只會輸出到指定檔案中,控制臺只列印組態檔讀取情況, - 當
ReportTo = both時,泄漏報告同時輸出到除錯控制臺與指定檔案中,檔案中除了第一行沒有輸出組態檔讀取情況外,其他地方與除錯控制臺的輸出保持一致,
本文作者:木三百川
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