PROBLEM:  (QAR 53676, QAR 44972) (Patch ID: OSF405-400325)
********
The atom command terminates with a SIGSEGV signal if the threaded program
being instrumented uses a stripped shared library.

The typical symptoms of the atom instrumentation failure are warnings
like this:

  > atom -tool third -env threads server
  atom: Error: Command '/tmp/atomAAAaaBpfa/server.tool' terminated with receipt
  of SIGSEGV signal.
  atom: Error: Run atom with the -debug switch to see if the error is in the
  instrumentation code.
  >

Using the -debug switch as suggested will show a segmentation fault in the
search_procedures routine, for example:

  > atom -tool third -env threads server -debug
  dbx version 3.11.10
  Type 'help' for help.

  [2] stop in InstrumentAll
  signal Segmentation fault at >*[search_procedures, 0x12008d1d0] ldl r2, 12(r2)
  (/bin/dbx)

One kind of application that triggers this problem is one that uses DCE,
because the libdce.so is stripped. However, any other threaded program
that uses a stripped shared library can trigger it.

PROBLEM:  (QAR 51465)		 (Patch ID: OSF405-400325)
********
A threaded program may not execute correctly when instrumented with the
"atom -tool third -all -env threads" or "atom -tool hiprof -all -env threads"
command. This is because these commands instrument shared libraries (such as
libc.so) that may be called by critical sections of libpthread.so.

A workaround is to avoid instrumenting the system-libraries, by omitting
the -all option from the atom command line or by appending the
"-excobj libpthreads.so -excobj libmach.so -excobj libexc.so -excobj libc.so"
options to the atom command.

This patch changes the tools so that they always exclude these system-libraries
from instrumentation, which results in the instrumented program executing
correctly.