отладка __do_global_dtors_aux, чтобы найти код

Question

Я пытаюсь найти ошибку. Использование GDB я вижу:

Program received signal SIGSEGV, Segmentation fault. 
0x00007f4325cc286f in std::ostream::flush()() from /usr/lib/libstdc++.so.6 
(gdb) bt 
#0 0x00007f4325cc286f in std::ostream::flush()() from /usr/lib/libstdc++.so.6 
#1 0x00007f4325c8d31c in std::ios_base::Init::~Init()() from /usr/lib/libstdc++.so.6 
#2 0x00007f4325462995 in __cxa_finalize (d=0x7f432451c458) at cxa_finalize.c:56 
#3 0x00007f432430ee86 in __do_global_dtors_aux() from /usr/lib/libsocketxx.so.1.2 
#4 0x0000000000000000 in ??() 

Однако я понятия не имею, где в коде строительство/разрушение глобальных переменных вызывает вопросы. Кроме того, кажется, GDB способен использовать отладочные LIBS и номера строк:

$ gdb 
GNU gdb (GDB) 7.3-debian 
Copyright (C) 2011 Free Software Foundation, Inc. 
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 
This is free software: you are free to change and redistribute it. 
There is NO WARRANTY, to the extent permitted by law. Type "show copying" 
and "show warranty" for details. 
This GDB was configured as "x86_64-linux-gnu". 
For bug reporting instructions, please see: 
<http://www.gnu.org/software/gdb/bugs/>. 
(gdb) show debug-file-directory 
The directory where separate debug symbols are searched for is "/usr/lib/debug". 
(gdb) attach 10681 
[...] 
Reading symbols from /usr/lib/libsocketxx.so.1.2...Reading symbols from /usr/lib/debug/usr/lib/libsocketxx.so.1.2.0...done. 
done. 
Loaded symbols for /usr/lib/libsocketxx.so.1.2 

я не могу, кажется, чтобы получить больше информации, используя Valgrind:

$ valgrind --tool=exp-sgcheck --trace-children=yes spawn-fcgi -f /usr/lib/server/server.fcgi -p 9000 -n 
==14248== exp-sgcheck, a stack and global array overrun detector 
==14248== NOTE: This is an Experimental-Class Valgrind Tool 
==14248== Copyright (C) 2003-2012, and GNU GPL'd, by OpenWorks Ltd et al. 
==14248== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info 
==14248== Command: spawn-fcgi -f /usr/lib/server/server.fcgi -p 9000 -n 
==14248== 
==14248== exp-sgcheck, a stack and global array overrun detector 
==14248== NOTE: This is an Experimental-Class Valgrind Tool 
==14248== Copyright (C) 2003-2012, and GNU GPL'd, by OpenWorks Ltd et al. 
==14248== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info 
==14248== Command: /bin/sh -c exec\ /usr/lib/server/server.fcgi 
==14248== 
==14248== exp-sgcheck, a stack and global array overrun detector 
==14248== NOTE: This is an Experimental-Class Valgrind Tool 
==14248== Copyright (C) 2003-2012, and GNU GPL'd, by OpenWorks Ltd et al. 
==14248== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info 
==14248== Command: /usr/lib/server/server.fcgi 
==14248== 
==14248== 
==14248== Process terminating with default action of signal 11 (SIGSEGV) 
==14248== Bad permissions for mapped region at address 0x7685B0E78C376F24 
==14248== at 0x7685B0E78C376F24: ??? 
==14248== by 0x65060EC: std::ostream::flush() (ostream.tcc:219) 
==14248== by 0x64C72FE: std::ios_base::Init::~Init() (ios_init.cc:131) 
==14248== by 0x6C5F994: __cxa_finalize (cxa_finalize.c:56) 
==14248== by 0x7EA3E85: ??? (in /usr/lib/libsocketxx.so.1.2.0) 
==14248== by 0x7EAC760: ??? (in /usr/lib/libsocketxx.so.1.2.0) 
==14248== by 0x6C5F611: __run_exit_handlers (exit.c:78) 
==14248== by 0x6C5F664: exit (exit.c:100) 
==14248== by 0x6C47C93: (below main) (libc-start.c:260) 
==14248== 
==14248== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 95 from 91) 

Как бы отслеживать такого рода ошибки?

EDIT:

Я был в состоянии использовать отладочный пакет, полная трассировка сейчас:

Program received signal SIGSEGV, Segmentation fault. 
Reading in symbols for ../../../../../src/libstdc++-v3/src/ostream-inst.cc...done. 
0x00007f7711d98dc7 in std::basic_streambuf<char, std::char_traits<char> >::pubsync (this=0x7fff6f2e8250) 
    at /build/buildd-gcc-4.4_4.4.5-8-amd64-za8kXx/gcc-4.4-4.4.5/build/x86_64-linux-gnu/libstdc++-v3/include/streambuf:248 
248  pubsync() { return this->sync(); } 
Current language: auto 
The current source language is "auto; currently c++". 
(gdb) bt full 
Reading in symbols for ../../../../../src/libstdc++-v3/src/ios_init.cc...done. 
Reading in symbols for cxa_finalize.c...done. 
#0 0x00007f7711d98dc7 in std::basic_streambuf<char, std::char_traits<char> >::pubsync (this=0x7fff6f2e8250) 
    at /build/buildd-gcc-4.4_4.4.5-8-amd64-za8kXx/gcc-4.4-4.4.5/build/x86_64-linux-gnu/libstdc++-v3/include/streambuf:248 
No locals. 
#1 0x00007f7711d8e0ed in std::ostream::flush (this=0x6247e0 <_ZSt4cout@@GLIBCXX_3.4>) 
    at /build/buildd-gcc-4.4_4.4.5-8-amd64-za8kXx/gcc-4.4-4.4.5/build/x86_64-linux-gnu/libstdc++-v3/include/bits/ostream.tcc:219 
     __err = std::_S_goodbit 
#2 0x00007f7711d4f2ff in std::ios_base::Init::~Init (this=0x7f77105b16d0 <_ZStL8__ioinit>, __in_chrg=<optimized out>) at ../../../../../src/libstdc++-v3/src/ios_init.cc:131 
No locals. 
#3 0x00007f7711518995 in __cxa_finalize (d=0x7f77105b1620) at cxa_finalize.c:56 
     check = <optimized out> 
     cxafn = 0x6247e0 <_ZSt4cout@@GLIBCXX_3.4> 
     cxaarg = 0x7fff6f2e8250 
     f = 0x7f771183f350 <initial+80> 
      funcs = 0x7f771183f300 <initial> 
#4 0x00007f77103a2316 in __do_global_dtors_aux() from /tmp/inst/usr/lib/libsocketxx.so.1.2 
No symbol table info available. 
#5 0x0000000000000000 in ??() 
No symbol table info available. 

Answer 1

Я не нашел способ отладки этого случая, однако я нашел реальную проблему , При использовании FCGI вы никогда не должны делать что-то вроде этого:

int main(void) { 
    // Backup the stdio streambufs 
    streambuf * cin_streambuf = cin.rdbuf(); 
    streambuf * cout_streambuf = cout.rdbuf(); 
    streambuf * cerr_streambuf = cerr.rdbuf(); 

    FCGX_Request request; 

    FCGX_Init(); 
    FCGX_InitRequest(&request, 0, 0); 

    while (FCGX_Accept_r(&request) == 0) { 
     fcgi_streambuf cin_fcgi_streambuf(request.in); 
     fcgi_streambuf cout_fcgi_streambuf(request.out); 
     fcgi_streambuf cerr_fcgi_streambuf(request.err); 

     cin.rdbuf(&cin_fcgi_streambuf); 
     cout.rdbuf(&cout_fcgi_streambuf); 
     cerr.rdbuf(&cerr_fcgi_streambuf); 

     // [YOUR CODE] 
     if(condition) return 1; // NEVER DO THIS 
    } 

    // restore stdio streambufs 
    cin.rdbuf(cin_streambuf); 
    cout.rdbuf(cout_streambuf); 
    cerr.rdbuf(cerr_streambuf); 

    return 0; 
}