Re: lin-lwp.c:1317: internal-error: lin_lwp_wait: Assertion `iterate_over_lwps (runing_callback, NULL)' failed.

["srikrish" <srikrish@in.ibm.com>]

In yesterday's post, I forgot to add that the program runs fine outside gdb.
Here's the output:
mymachine: /home/srik>./myprog somearg
entering main program. pid: 10861
In threadproc pid:10863

 getting up from sleep
entering main program. pid: 10863
end of main: 10863

mymachine: /home/srik>

Is this a limitation of GDB?


Subject: lin-lwp.c:1317: internal-error: lin_lwp_wait: Assertion
`iterate_over_lwps (runing_callback, NULL)' failed.


> Hi,
> I am getting an assertion failure/gdb-internal-error while running a
> multi-threaded program using the GDB20030731. Can some one point out if
this
> is a known bug or is there a workaround?
>
> Error Message: lin-lwp.c:1317: internal-error: lin_lwp_wait: Assertion
> `iterate_over_lwps (runing_callback, NULL)' failed.
>
> The test program and output follows. I am using 2.4.19-3Suse-SMP kernel.
> (linuxthreads)
> Thanks,
> Srikrishnan
>
> Test Program: Please note that I am calling exec of the same program
without
> arguments.
> #include <stdio.h>
> #include <pthread.h>
> void * threadproc(void * junk)
> {
>  int i;
>  printf("In threadproc pid:%d \n", getpid());
>     printf("\n getting up from sleep \n");
>   execv("myprog",0);=20
>     printf("exec failed \n");
> }
>
> int main(int argc, char * argv)
> {
>  int i;
>     void * ret;
>  pthread_t newthread;
>     printf("entering main program. pid: %d \n", getpid());
>  if(argc >1)
>  {
>   pthread_create(&newthread, NULL, threadproc, NULL);
>   printf("back to main. pid:%d \n",getpid());
>   }
>     printf("end of main: %d \n", getpid());
> }
>
>
> OUTOUT WHILE USING GDB after enabling printing of verbose/debug statements
> in gdb/lin-lwp.c
>
> >gdbdir/gdb myprog
> GNU gdb 20030731
> Copyright 2003 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you
are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
details.
> This GDB was configured as "s390-ibm-linux"...
> (gdb) run somearg
> Starting program: /home/fultonm/bug3380/test3380nosleep somearg
> CW:  waitpid 2122 received Trace/breakpoint trap (stopped)
> CW:  waitpid 2122 received Trace/breakpoint trap (stopped)
> CW:  waitpid 2122 received Trace/breakpoint trap (stopped)
> [New Thread 1024 (LWP 2122)]
> LLR: PTRACE_SINGLESTEP process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> SEL: Select single-step LWP 2122
> LLW: trap_ptid is process 2122.
> LLR: PTRACE_CONT process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> LLW: trap_ptid is process 2122.
> LLR: PTRACE_SINGLESTEP process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> SEL: Select single-step LWP 2122
> LLW: trap_ptid is process 2122.
> LLR: PTRACE_CONT process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> LLW: trap_ptid is process 2122.
> LLR: PTRACE_SINGLESTEP process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> SEL: Select single-step LWP 2122
> LLW: trap_ptid is process 2122.
> LLR: PTRACE_CONT process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> LLW: trap_ptid is process 2122.
> [New Thread 2049 (LWP 2123)]
> LLAL: PTRACE_ATTACH LWP 2123, 0, 0 (OK)
> LLAL: waitpid LWP 2123 received Stopped (signal) (stopped)
> LLR: PTRACE_SINGLESTEP process 2122, 0 (resume event thread)
> LLW: waitpid 2122 received Trace/breakpoint trap (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2122, 0, 0 (OK)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2122.
> SEL: Select single-step LWP 2122
> LLW: trap_ptid is LWP 2122.
> RC:  PTRACE_CONT LWP 2123, 0, 0 (resume sibling)
> LLR: PTRACE_CONT process 2122, 0 (resume event thread)
> LLW: waitpid 2123 received Real-time signal 0 (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2123, 0, 0 (OK)
> LLW: PTRACE_CONT LWP 2123, Unknown signal 77 (preempt 'handle')
> LLW: waitpid 2123 received Trace/breakpoint trap (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2123, 0, 0 (OK)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2123.
> SC:  kill LWP 2122 **<SIGSTOP>**
> SC:  lwp kill 0 ERRNO-OK
> SWC: waitpid LWP 2122 received Stopped (signal) (stopped)
> SWC: CALLING LLTA
> LLTA: PTRACE_PEEKUSER LWP 2122, 0, 0 (OK)
> LLW: trap_ptid is LWP 2123.
> [New Thread 1026 (LWP 2124)]
> LLAL: PTRACE_ATTACH LWP 2124, 0, 0 (OK)
> LLAL: waitpid LWP 2124 received Stopped (signal) (stopped)
> LLR: PTRACE_SINGLESTEP process 2123, 0 (resume event thread)
> LLW: waitpid 2123 received Trace/breakpoint trap (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2123, 0, 0 (OK)
> LLW: Candidate event Trace/breakpoint trap (stopped) in LWP 2123.
> SEL: Select single-step LWP 2123
> LLW: trap_ptid is LWP 2123.
> RC:  PTRACE_CONT LWP 2124, 0, 0 (resume sibling)
> RC:  PTRACE_CONT LWP 2122, 0, 0 (resume sibling)
> LLR: PTRACE_CONT process 2123, 0 (resume event thread)
> LLW: waitpid 2124 received Real-time signal 0 (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2124, 0, 0 (OK)
> LLW: PTRACE_CONT LWP 2124, Unknown signal 77 (preempt 'handle')
> In threadproc pid:2124
> LLW: waitpid 2122 received Real-time signal 0 (stopped)
>  getting up from sleep
> LLTA: PTRACE_PEEKUSER LWP 2122, 0, 0 (OK)
> back to main. pid:2122
> LLW: PTRACE_CONT LWP 2122, Unknown signal 77 (preempt 'handle')
> LLW: waitpid 2122 received Real-time signal 1 (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2122, 0, 0 (OK)
> LLW: PTRACE_CONT LWP 2122, Real-time signal 13 (preempt 'handle')
> LLW: waitpid 2124 received Real-time signal 0 (stopped)
> LLTA: PTRACE_PEEKUSER LWP 2124, 0, 0 (OK)
> LLW: PTRACE_CONT LWP 2124, Unknown signal 77 (preempt 'handle')
> LLW: waitpid 2123 received 0 (exited)
> LLW: LWP 2123 exited.
> LLW: waitpid 2122 received 0 (exited)
> SC:  kill LWP 2124 **<SIGSTOP>**
> SC:  lwp kill 0 ERRNO-OK
> SWC: waitpid LWP 2124 received Trace/breakpoint trap (stopped)
> SWC: CALLING LLTA
> LLTA: PTRACE_PEEKUSER LWP 2124, 0, 0 (OK)
> PTRACE_CONT LWP 2124, 0, 0 (OK)
> SWC: Candidate SIGTRAP event in LWP 2124
> SWC: waitpid LWP 2124 received Stopped (signal) (stopped)
> SWC: CALLING LLTA
> LLTA: PTRACE_PEEKUSER LWP 2124, 0, 0 (OK)
> LLW: LWP 2122 exited.
> lin-lwp.c:1317: internal-error: lin_lwp_wait: Assertion `iterate_over_lwps
> (run
> ing_callback, NULL)' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session? (y or n) y
>
> Create a core file of GDB? (y or n) y
> Abort
> mymachine: /home/srik>
>
>
>