pstack - print a stack trace of running processes

       Ross Thompson <ross@whatsis.com>

       Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>

Red Hat Linux                                      Feb 25 2002                                         PSTACK(1)

pstack  attaches  to  the  active  processes  named  by  the  pids on the command line, and prints out an
       execution stack trace, including a hint at what the function arguments are.   If  symbols  exist  in  the
       binary (usually the case unless you have run strip(1)), then symbolic addresses are printed as well.

       If  the  process  is  part  of  a  thread group, then pstack will print out a stack trace for each of the
       threads in the group.

       pstack - print a stack trace of running processes

pstack currently works only on Linux, only on an x86 machine running 32 bit  ELF  binaries  (64  bit  not
       supported).  Also, for symbolic information, you need to use a GNU compiler to generate your program, and
       you  can't  strip  symbols  from  the binaries.  For thread information to be dumped, you have to use the
       debug-aware version of the LinuxThreads libpthread.so library.  (To check, run  nm(1)  on  your  pthreads
       library,  and make sure that the symbol "__pthread_threads_debug" is defined.)  Threads are not supported
       with the newer NPTL libpthread.so library.

nm(1), ptrace(2)

pstack pid [...]