我有一段简单的代码:
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
return 0;
}
我使用pro文件在Qt Creator中进行编译:
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = testLeaks
TEMPLATE = app
SOURCES += main.cpp
HEADERS +=
FORMS +=
运行命令valgrind ./testLeaks
会检查内存泄漏并打印以下内容:
==31276== HEAP SUMMARY:
==31276== in use at exit: 1,190,544 bytes in 7,267 blocks
==31276== total heap usage: 46,096 allocs, 38,829 frees, 6,716,079 bytes allocated
==31276==
==31276== LEAK SUMMARY:
==31276== definitely lost: 2,788 bytes in 11 blocks
==31276== indirectly lost: 7,065 bytes in 182 blocks
==31276== possibly lost: 318,238 bytes in 1,233 blocks
==31276== still reachable: 862,453 bytes in 5,841 blocks
==31276== suppressed: 0 bytes in 0 blocks
如果我注释掉 QApplication,就没有内存泄漏了。为什么这个类会导致内存泄漏呢?
valgrind --leak-check=full --show-leak-kinds=all -v ./testLeaks
。 - László Papp