我正在使用Valgrind(内存泄漏工具)来查找潜在的内存泄漏。它运行这样:解释Valgrind内存泄漏摘要日志
$的valgrind --leak检查=全./myApp
以下报道:
==9458== 15,007 bytes in 126 blocks are possibly lost in loss record 622 of 622
==9458== at 0x4029FDE: operator new(unsigned int) (vg_replace_malloc.c:313)
==9458== by 0x415F213: std::string::_Rep::_S_create(unsigned int, unsigned int, std::allocator<char> const&) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.19)
==9458== by 0x4161125: char* std::string::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.19)
==9458== by 0x41617AF: std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.19)
==9458== by 0x808B061: Parser::parseLinear(rapidxml::xml_node<char>*, Linear*) (Parser.cpp:663)
==9458==
==9458== LEAK SUMMARY:
==9458== definitely lost: 0 bytes in 0 blocks
==9458== indirectly lost: 0 bytes in 0 blocks
==9458== possibly lost: 20,747 bytes in 257 blocks
==9458== still reachable: 57,052 bytes in 3,203 blocks
==9458== suppressed: 0 bytes in 0 blocks
==9458== Reachable blocks (those to which a pointer was found) are not shown.
==9458== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==9458==
==9458== For counts of detected and suppressed errors, rerun with: -v
==9458== ERROR SUMMARY: 21 errors from 21 contexts (suppressed: 0 from 0)
它看起来像有一个“可能失去”内存泄漏基于总结。但是,在Parser.cpp中追踪第663行后,我似乎无法确定问题。 xml_node <> *是开源库RapidXML的一部分。源代码如下所示:
line 661: Tracker track;
line 662: xml_node<>* trackingNode = node->first_node(); // rapidxml API
line 663: track.setValue(trackingNode->first_node()->value());
凡setValue方法定义为:
void Tracker::setValue(const string& s) {
this->val = s;
}
setValue()是否内联? 'val'是'串'吗? – jxh 2014-09-03 19:21:57
嗨jxh,是val是一个字符串。 setValue实际上是一个类的成员函数。它应该看起来像这样:void myClass :: setValue(const string&s) – codeshark 2014-09-03 19:23:59
setValue()方法是在类的头文件中定义的,还是显式声明为inline,或者在其源代码体中定义在编译663行时,编译器已经解析了它?我想知道函数调用是否被内联。 – jxh 2014-09-03 19:29:26