Report maximum memory at termination

In addition to the current memory (which is, in many cases, useless),
report maximum memory stamp during the execution

timeout

@@ -109,6 +109,8 @@ my $timeinfo = { total => 0, finished => 0, current => {} };
 # For this -- update_memory
 my $meminfo = 0;
 my $fulltime = 0;
+# We store the "maximum" used memory (the process may free it and we won't get the proper timestamp at the end).
+my $maxmem = -1;
 
 # Default ticklimit - limit of number of timeout script wakeups (ticks) before we decide that the controlling processes are hang up (if they haven't done any useful work).  We use ticks instead of real time seconds because the whole stack may be paused with SIGSTOP, and should not die in this case.
 #
@@ -134,6 +136,7 @@ while ($status eq 'wait'){
 			# According to signal(7), wait is a safe function, so we can call anything we want here.
 			$timeinfo = update_time($blackbox_pid,$timeinfo);
 			$meminfo = update_memory($blackbox_pid,$meminfo);
+			$maxmem = $meminfo if $meminfo > $maxmem;
 			update_info_by_ucmd($blackbox_pid,$uinfo);
 			die "Assume waitpid return 0\n";
 		};
@@ -404,7 +407,7 @@ sub print_uinfo
 	my $reason = shift;
 	# Print generic information to STDERR
 	my $ticks = $timeinfo->{ticks_stale} || 0;
-	printf STDERR "${id_str}%s CPU %.2f MEM %d STALE %d\n", $reason, $timeinfo->{total}, $meminfo, ceil($ticks/$frequency);
+	printf STDERR "${id_str}%s CPU %.2f MEM %d MAXMEM %d STALE %d\n", $reason, $timeinfo->{total}, $meminfo, $maxmem, ceil($ticks/$frequency);
 
 	if (defined $output){
 		open(FIL,">>", $output) or die "Can't open output file: $!\n";