Re: backtrace/1505: [regression] gdb prints a bad backtrace for a thread

[mec dot gnu at mindspring dot com (Michael Elizabeth Chastain)]

The following reply was made to PR backtrace/1505; it has been noted by GNATS.

From: mec.gnu@mindspring.com (Michael Elizabeth Chastain)
To: kettenis@chello.nl
Cc: gdb-gnats@sources.redhat.com
Subject: Re: backtrace/1505: [regression] gdb prints a bad backtrace for a thread
Date: Mon, 12 Jan 2004 07:10:53 -0500 (EST)

 The HP test drive cluster has a bunch of Linux systems.  After getting
 all of them to build gdb (some of them don't have ncurses installed!),
 here are the results for backtracing the three threads:
 
   gcc -g -o pthreads.$machine pthreads.c -lpthread
   gdb pthreads.$machine
   (gdb) break common_routine
   (gdb) run
   (gdb) thread apply all backtrace
 
 This is with gdb HEAD 2004-01-09 22:05:53 UTC.
 
 These platforms worked:
 
   debian woody, red hat 2.1 es, red hat 2.1 as, slackware 9.1.0, suse 8.1
   some stop at "clone"
   some stop at "thread_start"
 
 This platform had an unrelated problem:
 
   mandrake 9.2
 
 So I would ask, check once more on red hat linux 9, because my
 original problem was on red hat linux 8.  Then close the bug.
 
 ===
 
 Details
 
 ===
 
 Debian Woody
 
   Thread 3 (Thread 1026 (LWP 11897)):
   #0  common_routine (arg=1) at pthreads.c:53
   #1  0x08048711 in thread1 (arg=0xfeedface) at pthreads.c:82
   #2  0x4001f0ba in pthread_start_thread () from /lib/libpthread.so.0
   #3  0x4001f101 in pthread_start_thread_event () from /lib/libpthread.so.0
   #4  0x400fcd6a in clone () from /lib/libc.so.6
 
   Thread 2 (Thread 2049 (LWP 11896)):
   #0  0x400f5bb0 in poll () from /lib/libc.so.6
   #1  0x4001ed96 in __pthread_manager () from /lib/libpthread.so.0
   #2  0x4001efc0 in __pthread_manager_event () from /lib/libpthread.so.0
   #3  0x400fcd6a in clone () from /lib/libc.so.6
 
   Thread 1 (Thread 1024 (LWP 11894)):
   #0  0x400cdde1 in nanosleep () from /lib/libc.so.6
   #1  0x400cdd78 in sleep () from /lib/libc.so.6
   #2  0x08048917 in main (argc=1, argv=0xbffffb74) at pthreads.c:151
   53        if (verbose) printf("common_routine (%d)\n", arg);
 
 Mandrake 9.2
 
   *** gdb on threaded program does not work ***
 
   (gdb) break common_routine
   Breakpoint 1 at 0x80485a2: file pthreads.c, line 53.
   (gdb) run
   Starting program:
   /house/chastain/gdb/pthread.i686-pc-linux-gnu.mandrake-9.2.exe
 
   Program received signal SIG32, Real-time event 32.
   0x40028714 in pthread_getconcurrency () from /lib/i686/libpthread.so.0
   (gdb) cont
   Continuing.
 
   Program received signal SIGTRAP, Trace/breakpoint trap.
   0x40027de0 in pthread_yield () from /lib/i686/libpthread.so.0
 
 Red Hat 2.1 Enterprise Server
 
   Thread 3 (Thread 8194 (LWP 10657)):
   #0  common_routine (arg=1) at pthreads.c:53
   #1  0x08048781 in thread1 (arg=0xfeedface) at pthreads.c:82
   #2  0x40029c6f in pthread_start_thread (arg=0x4038fbe0) at manager.c:279
   #3  0x40029d5f in pthread_start_thread_event (arg=0x4038fbe0) at manager.c:303
   #4  0x40141cca in thread_start () from /lib/i686/libc.so.6
 
   Thread 2 (Thread 16385 (LWP 10656)):
   #0  0x4013a467 in __poll (fds=0x804bb74, nfds=1, timeout=2000)
   at ../sysdeps/unix/sysv/linux/poll.c:63
   #1  0x40029920 in __pthread_manager (arg=0x5) at manager.c:135
   #2  0x4002a509 in __pthread_manager_event (arg=0x5) at manager.c:226
   #3  0x40141cca in thread_start () from /lib/i686/libc.so.6
 
   Thread 1 (Thread 8192 (LWP 10654)):
   #0  0x40082be5 in __sigsuspend (set=0xbffec5b0)
   at ../sysdeps/unix/sysv/linux/sigsuspend.c:45
   #1  0x4002c2b9 in __pthread_wait_for_restart_signal (self=0x40031020) at pthread.c:1027
   #2  0x4002c38c in __pthread_create_2_1 (thread=0xbffec76c, attr=0xbffec720, start_routine=0x80486fc <thread1>, arg=0xfeedface) at restart.h:34
   #3  0x08048933 in main (argc=1, argv=0xbffec7e4) at pthreads.c:145
   53        if (verbose) printf("common_routine (%d)\n", arg);
 
 Red Hat 2.1 Advanced Server
 
   Thread 3 (Thread 8194 (LWP 11402)):
   #0  common_routine (arg=1) at pthreads.c:53
   #1  0x08048781 in thread1 (arg=0xfeedface) at pthreads.c:82
   #2  0x40029c6f in pthread_start_thread (arg=0x4038fbe0) at manager.c:279
   #3  0x40029d5f in pthread_start_thread_event (arg=0x4038fbe0) at manager.c:303
   #4  0x40141cca in thread_start () from /lib/i686/libc.so.6
 
   Thread 2 (Thread 16385 (LWP 11401)):
   #0  0x4013a467 in __poll (fds=0x804bb74, nfds=1, timeout=2000) at ../sysdeps/unix/sysv/linux/poll.c:63
   #1  0x40029920 in __pthread_manager (arg=0x5) at manager.c:135
   #2  0x4002a509 in __pthread_manager_event (arg=0x5) at manager.c:226
   #3  0x40141cca in thread_start () from /lib/i686/libc.so.6
 
   Thread 1 (Thread 8192 (LWP 11400)):
   #0  0x40082be5 in __sigsuspend (set=0xbffed200) at ../sysdeps/unix/sysv/linux/sigsuspend.c:45
   #1  0x4002c2b9 in __pthread_wait_for_restart_signal (self=0x40031020) at pthread.c:1027
   #2  0x4002c38c in __pthread_create_2_1 (thread=0xbffed3bc, attr=0xbffed370, start_routine=0x80486fc <thread1>, arg=0xfeedface) at restart.h:34
   #3  0x08048933 in main (argc=1, argv=0xbffed434) at pthreads.c:145
   53        if (verbose) printf("common_routine (%d)\n", arg);
 
 Slackware 9.1.0
 
   Thread 3 (Thread 16386 (LWP 30899)):
   #0  common_routine (arg=1) at pthreads.c:53
   #1  0x08048681 in thread1 (arg=0xfeedface) at pthreads.c:82
   #2  0x4002cca3 in pthread_start_thread () from /lib/libpthread.so.0
   #3  0x4002cd1f in pthread_start_thread_event () from /lib/libpthread.so.0
   #4  0x4015ac97 in clone () from /lib/libc.so.6
 
   Thread 2 (Thread 32769 (LWP 30898)):
   #0  0x40151f32 in loser_poll () from /lib/libc.so.6
   #1  0x40151ffe in poll () from /lib/libc.so.6
   #2  0x4002c9ae in __pthread_manager () from /lib/libpthread.so.0
   #3  0x4002cba7 in __pthread_manager_event () from /lib/libpthread.so.0
   #4  0x4015ac97 in clone () from /lib/libc.so.6
 
   Thread 1 (Thread 16384 (LWP 30896)):
   #0  0x401299a6 in nanosleep () from /lib/libc.so.6
   #1  0x00000000 in ?? ()
   #2  0x40129809 in sleep () from /lib/libc.so.6
   #3  0x08048873 in main (argc=1, argv=0xbffff7b4) at pthreads.c:151
   53        if (verbose) printf("common_routine (%d)\n", arg);
 
 
 SusE 8.1
 
   Thread 3 (Thread 1026 (LWP 31784)):
   #0  common_routine (arg=1) at pthreads.c:53
   #1  0x08048682 in thread1 (arg=0xfeedface) at pthreads.c:82
   #2  0x400281b0 in pthread_start_thread () from /lib/libpthread.so.0
   #3  0x4002822f in pthread_start_thread_event () from /lib/libpthread.so.0
   #4  0x40102e4a in thread_start () from /lib/libc.so.6
 
   Thread 2 (Thread 2049 (LWP 31783)):
   #0  0x400fb6cb in poll () from /lib/libc.so.6
   #1  0x40027ec8 in __pthread_manager () from /lib/libpthread.so.0
   #2  0x400280bd in __pthread_manager_event () from /lib/libpthread.so.0
   #3  0x40102e4a in thread_start () from /lib/libc.so.6
 
   Thread 1 (Thread 1024 (LWP 31781)):
   #0  0x40060cce in sigaction () from /lib/libc.so.6
   #1  0x4002b33a in sigaction () from /lib/libpthread.so.0
   #2  0x400d4b92 in sleep () from /lib/libc.so.6
   #3  0x08048875 in main (argc=1, argv=0xbffff324) at pthreads.c:151
   53        if (verbose) printf("common_routine (%d)\n", arg);