gdb 5.0, Slackware 7.1 (glibc 2.1.3)
The following program will run correctly without gdb, but will not run when run
within GDB:
/* compile with cc -o pthread_test pthread_test.c -lpthread */
#include <pthread.h>
void *pthread_test(void *);
main()
{
int i;
pthread_t tid;
for(i=0;i<100;i++)
{
pthread_create(&tid,NULL,pthread_test,NULL);
}
}
void *
pthread_test(void *arg)
{
sleep(100);
}
Here is the output of running the above application
randy@DontKnow:/tmp> ./pthread_test
randy@DontKnow:/tmp> gdb ./pthread_test
GNU gdb 5.0
Copyright 2000 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 "i386-slackware-linux"...
(gdb) run
Starting program: /tmp/./pthread_test
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
[New Thread 1024 (runnable)]
[New Thread 2049 (runnable)]
[New Thread 1026 (runnable)]
[New Thread 2051 (runnable)]
Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 1026 (runnable)]
0x0 in ?? ()
(gdb) info threads
4 Thread 2051 (runnable) 0x400d7efe in clone () from /lib/libc.so.6
* 3 Thread 1026 (runnable) 0x0 in ?? ()
2 Thread 2049 (runnable) 0x40023d8d in __linuxthreads_create_event ()
at events.c:24
1 Thread 1024 (runnable) 0x4004b56a in sigsuspend () from /lib/libc.so.6
-------
I will appreciate hearing about a patch, soon.
--Randy Austin ([EMAIL PROTECTED])
Contrary to popular belief, UNIX is user friendly.
It just happens to be selective about who it makes friends with.
