(gdb) t 1
[Switching to thread 1 (Thread -1208625472 (LWP 9312))]#0  0x00701402 in __kernel_vsyscall ()
(gdb) bt
#0  0x00701402 in __kernel_vsyscall ()
#1  0x0026bf98 in pthread_join () from /lib/libpthread.so.0
#2  0x069d59e7 in SDL_SYS_WaitThread (thread=0xfffffffc) at SDL_systhread.c:136
#3  0x069d54a2 in SDL_WaitThread (thread=0x9f2ed18, status=0x0)
    at SDL_thread.c:277
#4  0x082a4644 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#5  0x082a4675 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#6  0x082a4d37 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#7  0x082a4c08 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#8  0x081f7b8e in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#9  0x08277c73 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#10 0x081c75c1 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#11 0x081c9c48 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#12 0x0812ef64 in std::operator+<char, std::char_traits<char>, std::allocator<char> > ()
---Type <return> to continue, or q <return> to quit---
#13 0x0813610d in std::operator+<char, std::char_traits<char>, std::allocator<char> > ()
#14 0x08136392 in std::operator+<char, std::char_traits<char>, std::allocator<char> > ()
#15 0x00bc3de6 in __libc_start_main () from /lib/libc.so.6
#16 0x0804f075 in ?? ()

(gdb) t 2
[Switching to thread 2 (Thread 25156528 (LWP 9319))]#0  0x00701402 in __kernel_vsyscall ()
(gdb) bt
#0  0x00701402 in __kernel_vsyscall ()
#1  0x00c724b1 in ___newselect_nocancel () from /lib/libc.so.6
#2  0x069d6705 in SDL_Delay (ms=25156496) at SDL_systimer.c:201
#3  0x0698baf2 in ESD_WaitAudio (this=0x9b96ea8) at SDL_esdaudio.c:214
#4  0x0698547e in SDL_RunAudio (audiop=0x9b96ea8) at SDL_audio.c:195
#5  0x069d5467 in SDL_RunThread (data=0x9b9b770) at SDL_thread.c:218
#6  0x069d5885 in RunThread (data=0xfffffdfe) at SDL_systhread.c:82
#7  0x0026bb80 in start_thread () from /lib/libpthread.so.0
#8  0x00c79dee in clone () from /lib/libc.so.6

(gdb) t 3
[Switching to thread 3 (Thread 43576240 (LWP 9320))]#0  0x00701402 in __kernel_vsyscall ()
(gdb) bt
#0  0x00701402 in __kernel_vsyscall ()
#1  0x0026d7a6 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x069d60b7 in SDL_CondWait (cond=0x9f38120, mutex=0xfffffffc)
    at SDL_syscond.c:181
#3  0x082a47d4 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#4  0x082025dd in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string<__gnu_cxx::__normal_iterator<char*, std::string> > ()
#5  0x069d5467 in SDL_RunThread (data=0x9f2d5f0) at SDL_thread.c:218
#6  0x069d5885 in RunThread (data=0xfffffffc) at SDL_systhread.c:82
#7  0x0026bb80 in start_thread () from /lib/libpthread.so.0
#8  0x00c79dee in clone () from /lib/libc.so.6