[Bug dyninst/15144] occasional (40%) stapdyn spin/hang during sdt.exp

["fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15144

--- Comment #2 from Frank Ch. Eigler <fche at redhat dot com> 2013-02-14 18:37:51 UTC ---
Additional backtrace info from the affected process:

(gdb) bt
#0  0x00000031e18da4c7 in sched_yield () at
../sysdeps/unix/syscall-template.S:81
#1  0x00002aaaabc10ff5 in GeneratorLinux::evictFromWaitpid() () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#2  0x00002aaaabc11079 in GeneratorLinux::~GeneratorLinux() () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#3  0x00002aaaabc110a9 in GeneratorLinux::~GeneratorLinux() () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#4  0x00000031e183944a in __cxa_finalize (d=0x2aaaabf04da0) at
cxa_finalize.c:55
#5  0x00002aaaabc0f513 in __do_global_dtors_aux () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#6  0x00007fff2a0c2cc0 in ?? ()
#7  0x00000031e140f9da in _dl_fini () at dl-fini.c:253
Backtrace stopped: frame did not save the PC
(gdb) info thread
  Id   Target Id         Frame 
  2    Thread 0x2aaaad24c700 (LWP 4634) "stapdyn"
pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
* 1    Thread 0x2aaaacc20a00 (LWP 4632) "stapdyn" 0x00000031e18da4c7 in
sched_yield ()
    at ../sysdeps/unix/syscall-template.S:81
(gdb) thread 2
[Switching to thread 2 (Thread 0x2aaaad24c700 (LWP 4634))]
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
185    62:    movl    (%rsp), %edi
(gdb) bt
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00002aaaabc248cd in CondVar::wait() () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#2  0x00002aaaabc0eb48 in LinuxPtrace::main() () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#3  0x00002aaaabc2453c in thread_init(void*) () from
/usr/lib64/dyninst/libpcontrol.so.8.0
#4  0x00000031e2407c63 in start_thread (arg=0x2aaaad24c700) at
pthread_create.c:308
#5  0x00000031e18f524d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:113

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