如何在C++中避免下面的purify检测到的内存泄漏？

Question

我得到以下内存字符串可能是由std：：leak.Its引起的。我怎么才能避免呢？

PLK: 23 bytes potentially leaked at 0xeb68278

  * Suppressed in /vobs/ubtssw_brrm/test/testcases/.purify [line 3]

  * This memory was allocated from:

        malloc         [/vobs/ubtssw_brrm/test/test_build/linux-x86/rtlib.o]

        operator new(unsigned) [/vobs/MontaVista/Linux/montavista/pro/devkit/x86/586/target/usr/lib/libstdc++.so.6]

        operator new(unsigned) [/vobs/ubtssw_brrm/test/test_build/linux-x86/rtlib.o]

        std::string<char, std::char_traits<char>, std::allocator<char>>::_Rep::_S_create(unsigned, unsigned, std::allocator<char> const&) [/vobs/MontaVista/Linux/montavista/pro/devkit/

x86/586/target/usr/lib/libstdc++.so.6]

        std::string<char, std::char_traits<char>, std::allocator<char>>::_Rep::_M_clone(std::allocator<char> const&, unsigned) [/vobs/MontaVista/Linux/montavista/pro/devkit/x86/586/tar

get/usr/lib/libstdc++.so.6]

        std::string<char, std::char_traits<char>, std::allocator<char>>::string<char, std::char_traits<char>, std::allocator<char>>(std::string<char, std::char_traits<char>, std::alloc

ator<char>> const&) [/vobs/MontaVista/Linux/montavista/pro/devkit/x86/586/target/usr/lib/libstdc++.so.6]

        uec_UEDir::getEntryToUpdateAfterInsertion(rcapi_ImsiGsmMap const&, rcapi_ImsiGsmMap&, std::_Rb_tree_iterator<std::pair<std::string<char, std::char_traits<char>, std::allocator<

char>> const, UEDirData >>&) [/vobs/ubtssw_brrm/uectrl/linux-x86/../src/uec_UEDir.cc:2278]

        uec_UEDir::addUpdate(rcapi_ImsiGsmMap const&, LocalUEDirInfo&, rcapi_ImsiGsmMap&, int, unsigned char) [/vobs/ubtssw_brrm/uectrl/linux-x86/../src/uec_UEDir.cc:282]

        ucx_UEDirHandler::addUpdateUEDir(rcapi_ImsiGsmMap, UEDirUpdateType, acap_PresenceEvent) [/vobs/ubtssw_brrm/ucx/linux-x86/../src/ucx_UEDirHandler.cc:374]

Answer 1

我曾经有一个案例，Valgrind指出我在std::string中有泄漏，但我看不出是如何泄漏的。事实证明，我泄漏了另一个通过值保存字符串的对象，但Valgrind也正确地捕获了泄漏的字符串内存(这是泄漏的绝大多数内存)。我怀疑uec_UEDir没有正确地管理它的字符串，或者它自己被泄露了。实际上，我最终通过非常仔细的代码检查找到了我的问题。