我有一个运行了几个线程的应用程序。我有两个线程在试图分配std::字符串时似乎处于死锁状态。检查两个线程的回溯表明,在某个时候,有人试图分配std::string,但得到了一个错误的\u alloc异常。在catch块中,创建另一个字符串,试图将调用堆栈写入某个日志文件。同时,另一个线程也在尝试分配一个std::string,然后整个进程陷入困境。
#0 0x004cf7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x034ba3de in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
#2 0x034b700b in _L_mutex_lock_35 () from /lib/tls/libpthread.so.0
#3 0x004e5fd4 in ?? () from /lib/ld-linux.so.2
#4 0x07c9f9bc in ?? () from /.../libstdc++.so.5
#5 0x00000037 in ?? ()
#6 0x07ca1714 in std::__default_alloc_template<true, 0>::_S_free_list () from /.../libstdc++.so.5
#7 0x9b2223a8 in ?? ()
#8 0x07c6ab7e in std::__default_alloc_template<true, 0>::allocate () from /.../libstdc++.so.5
#9 0x07c6ab7e in std::__default_alloc_template<true, 0>::allocate () from /.../libstdc++.so.5
#10 0x07c70b68 in std::string::_Rep::_S_create () from /.../libstdc++.so.5
#11 0x081c5ec0 in std::string::_S_construct<char*> ()
#12 0x081c33a2 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<char*> ()
#13 0x081c296e in std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::str ()
#14 0x02af7d7a in os::bad_allocation_t::bad_allocation_t () from /.../libmylib.so
#15 0x02af84a9 in operator new () from /.../libmylib.so
#16 0x07c6b0f1 in std::__default_alloc_template<true, 0>::_S_chunk_alloc () from /.../libstdc++.so.5
#17 0x07c6affd in std::__default_alloc_template<true, 0>::_S_refill () from /.../libstdc++.so.5
#18 0x07c6ab6c in std::__default_alloc_template<true, 0>::allocate () from /.../libstdc++.so.5
#19 0x07c78b2f in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_Rep::_S_create () from /.../libstdc++.so.5
#20 0x07c78c59 in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_Rep::_M_clone () from /.../libstdc++.so.5
#21 0x07c76996 in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::reserve () from /.../libstdc++.so.5
#22 0x07c76cff in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::append () from /.../libstdc++.so.5
在#14,您会看到在我自己的异常类中包装的坏分配被捕获,然后创建另一个字符串。
另一条线是:
#0 0x004cf7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x034ba3de in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
#2 0x034b700b in _L_mutex_lock_35 () from /lib/tls/libpthread.so.0
#3 0x18f54584 in ?? ()
#4 0x07c9f9bc in ?? () from /.../libstdc++.so.5
#5 0x00000033 in ?? ()
#6 0x07ca1714 in std::__default_alloc_template<true, 0>::_S_free_list () from /.../libstdc++.so.5
#7 0x9b4236c8 in ?? ()
#8 0x07c6ab7e in std::__default_alloc_template<true, 0>::allocate () from /.../libstdc++.so.5
#9 0x07c6ab7e in std::__default_alloc_template<true, 0>::allocate () from /.../libstdc++.so.5
#10 0x07c78b2f in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_Rep::_S_create () from /.../libstdc++.so.5
#11 0x07c78c59 in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_Rep::_M_clone () from /.../libstdc++.so.5
#12 0x07c76996 in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::reserve () from /.../libstdc++.so.5
#13 0x07c76cff in std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::append () from /.../libstdc++.so.5
有人能提供比我目前收集到的更多的见解吗?
