Re: [Boost-users] one memory leak

On Thu, Dec 5, 2013 at 9:48 PM, XIN LI wrote:

Hi there, I use boost version 1.49.0. I meet a memory leak for below sentences: boost::filesystem::path tmp = input.stem(); string strDir = tmp.normalize().string();

Valgrind report memory leak as below:

==18299== 56 bytes in 1 blocks are still reachable in loss record 26 of 61 ==18299== at 0x16DF68B8: malloc (vg_replace_malloc.c:270) ==18299== by 0x3F64FEC: operator new(unsigned long) (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x3F5B8F1: stlp_std::priv::__acquire_category(char const*&, char*, _Locale_name_hint*, char const* (*)(char const*, char*, _Locale_name_hint*, int*), void* (*)(char const*, _Locale_name_hint*, int*), char const* (*)(char*), stlp_std::hash_map, stlp_std::pair, stlp_std::hash >, stlp_std::equal_to >, stlp_std::allocator const, stlp_std::pair > > >**, int*) (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x3F5BD04: stlp_std::priv::__acquire_ctype(char const*&, char*, _Locale_name_hint*, int*) (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x3F3F502: stlp_std::_Locale_impl::insert_ctype_facets(char const*&, char*, _Locale_name_hint*) (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x3F3DC3C: stlp_std::locale::locale(char const*) (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x458FFFE: boost::filesystem3::path::wchar_t_codecvt_facet() (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x4591806: boost::filesystem3::path::begin() const (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x4592844: boost::filesystem3::path::m_normalize() (in /home/lixin/work/prj/hotfix/13q2_ehf1/src/prosim/dist/Debug_64/GNU-Linux-x86/nanospice) ==18299== by 0x21019EB: boost::filesystem3::path::normalize() (path.hpp:430)

Because my program need run thousands of time and very sensitive for the memory leak. Could anyone help to suggest one way to avoid such memory leak? Thanks a lot!

Are you sure that this occurs every time? In my experience, some of the std::locale things are initialized once upon first use, and this "leak" will be a one-time issue. Please verify that if you make another path that you will get duplicate leakage. Brian