Attachment #726 for bug #792

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    suppressions_path = os.path.join (base, VALGRIND_SUPPRESSIONS_FILE)
    path_cmd = os.path.join (NS3_BUILDDIR, NS3_ACTIVE_VARIANT, shell_command)
    if valgrind:
        cmd = "valgrind --suppressions=%s --leak-check=full --show-reachable=yes --error-exitcode=2 %s" % (suppressions_path, 
            path_cmd)
    else:
        cmd = path_cmd



    start_time = time.time()
    proc = subprocess.Popen(cmd, shell = True, cwd = directory, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    stdout_results, stderr_results = proc.communicate()
    elapsed_time = time.time() - start_time

    error = False
    if valgrind:
      reg = re.compile ('still reachable: ([^ ]+) bytes')
      for line in proc.stderr:
          result = reg.search(line)
          if result is None:
              continue
          if result.group(1) != "0":
             error = True
    stdout_results, stderr_results = proc.communicate()
    retval = proc.returncode

    #
    # valgrind sometimes has its own idea about what kind of memory management
    # errors are important.  We want to detect *any* leaks, so the way to do 
    # that is to look for the presence of a valgrind leak summary section.
    #
    # If another error has occurred (like a test suite has failed), we don't 
    # want to trump that error, so only do the valgrind output scan if the 
    # test has otherwise passed (return code was zero).
    #
    if valgrind and retval == 0 and "== LEAK SUMMARY:" in stderr_results:
        retval = 2
    
    if options.verbose:
        print "Return code = ", retval
        print "stderr = ", stderr_results




            raise Utils.WafError("Options --command-template and --valgrind are conflicting")
        if not env['VALGRIND']:
            raise Utils.WafError("valgrind is not installed")
        argv = [env['VALGRIND'], "--leak-check=full", "--show-reachable=yes", "--error-exitcode=1"] + argv
        proc = subprocess.Popen(argv, env=proc_env, cwd=cwd, stderr=subprocess.PIPE)
        reg = re.compile ('definitely lost: ([^ ]+) bytes')
        error = False
        for line in proc.stderr:
            sys.stderr.write(line)
            if "== LEAK SUMMARY" in line:
            if result is None:
                continue
            if result.group(1) != "0":
                error = True
        retval = proc.wait()
        if retval == 0 and error:

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