#!/usr/bin/sh
#
# dappprof - profile user and library function usage.
#            Written using DTrace (Solaris 10 3/05).
#
# The default output traces user functions as they are called. Options
#  can be used to examine libraries and timestamps.
#
# $Id: dappprof,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $
#
# USAGE: dappprof [-acehoTU] [-u lib] { -p PID | command }
#
#          -p PID          # examine this PID
#          -a              # print all details
#          -c              # print call counts
#          -e              # print elapsed times (us)
#          -o              # print on cpu times (us)
#          -T              # print totals
#          -u lib          # trace this library instead
#          -U              # trace all libraries + user functions
#          -b bufsize      # dynamic variable buf size (default is "4m")
#  eg,
#       dappprof df -h       # run and examine the "df -h" command
#       dappprof -p 1871     # examine PID 1871
#
# The elapsed times are interesting, to help identify calls that take
#  some time to complete (during which the process may have context
#  switched off the CPU). 
#
# SEE ALSO: dapptrace      # DTraceToolkit
#           dtruss         # DTraceToolkit
#           apptrace           
#
# COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
#
# CDDL HEADER START
#
#  The contents of this file are subject to the terms of the
#  Common Development and Distribution License, Version 1.0 only
#  (the "License").  You may not use this file except in compliance
#  with the License.
#
#  You can obtain a copy of the license at Docs/cddl1.txt
#  or http://www.opensolaris.org/os/licensing.
#  See the License for the specific language governing permissions
#  and limitations under the License.
#
# CDDL HEADER END
#
# Author: Brendan Gregg  [Sydney, Australia]
#
# 16-May-2005   Brendan Gregg   Created this.
# 17-Jul-2005	   "      "	Last update.
#


##############################
# --- Process Arguments ---
#

### Default variables
opt_totals=0; opt_pid=0; pid=0; opt_lib=0; lib=""
opt_elapsed=0; opt_cpu=0; opt_counts=0; opt_liball=0
opt_command=0; command=""; opt_buf=0; buf="4m"

### Process options
while getopts ab:cehop:Tu:U name
do
        case $name in
        a)      opt_liball=1; opt_counts=1; opt_elapsed=1; opt_cpu=1 
		opt_totals=1 ;;
	b)	opt_buf=1; buf=$OPTARG ;;
        p)      opt_pid=1; pid=$OPTARG ;;
        u)      opt_lib=1; lib=$OPTARG ;;
        U)      opt_liball=1 ;; 
	c)	opt_counts=1 ;;
	e)	opt_elapsed=1 ;;
	o)	opt_cpu=1 ;;
	T)	opt_totals=1 ;;
        h|?)    cat <<-END >&2
		USAGE: dappprof [-cehoTU] [-u lib] { -p PID | command }

		          -p PID          # examine this PID
		          -a              # print all details
		          -c              # print syscall counts
		          -e              # print elapsed times (us)
		          -o              # print on cpu times
		          -T              # print totals
		          -u lib          # trace this library instead
		          -U              # trace all libraries + user funcs
		          -b bufsize      # dynamic variable buf size
		   eg,
		       dappprof df -h       # run and examine "df -h"
		       dappprof -p 1871     # examine PID 1871
		       dappprof -ap 1871    # print all data
		END
		exit 1
        esac
done
shift `expr $OPTIND - 1`

### Option logic
if [ $opt_pid -eq 0 ]; then
	opt_command=1
	if [ "$*" = "" ]; then
		$0 -h
		exit
	fi
	command="$*"
fi
if [ $opt_elapsed -eq 0 -a $opt_cpu -eq 0 -a $opt_counts -eq 0 ]; then
        opt_elapsed=1;
fi


### Probe logic
if [ $opt_liball -eq 1 ]; then
	probe_entry='pid$target:::entry'
	probe_return='pid$target:::return'
elif [ $opt_lib -eq 1 ]; then
	probe_entry='pid$target:'$lib'::entry'
	probe_return='pid$target:'$lib'::return'
else
 	probe_entry='pid$target:a.out::entry'
 	probe_return='pid$target:a.out::return'
fi

#################################
# --- Main Program, DTrace ---
#

### Define D Script
dtrace='
 #pragma D option quiet

 /*
  * Command line arguments
  */
 inline int OPT_command   = '$opt_command';
 inline int OPT_liball    = '$opt_liball';
 inline int OPT_elapsed   = '$opt_elapsed';
 inline int OPT_cpu       = '$opt_cpu';
 inline int OPT_counts    = '$opt_counts';
 inline int OPT_totals    = '$opt_totals';
 inline int OPT_pid       = '$opt_pid';
 inline int PID           = '$pid';
 inline string NAME       = "'$pname'";

 dtrace:::BEGIN 
 /! OPT_command/
 {
	printf("Tracing... Hit Ctrl-C to end...\n");
 }

 /*
  * Save syscall entry info
  */
 '$probe_entry'
 {
        /* set function depth */
        this->fdepth = ++fdepth[probefunc];

	/* set start details */
	self->start[probefunc,this->fdepth] = timestamp;
	self->vstart[probefunc,this->fdepth] = vtimestamp;

	/* count occurances */
	OPT_counts && OPT_liball ? @Counts[probemod,probefunc] = count() : 1;
	OPT_counts && ! OPT_liball ? @Counts[probefunc] = count() : 1;
	OPT_counts && OPT_totals && OPT_liball ? 
	    @Counts["TOTAL:",""] = count() : 1;
	OPT_counts && OPT_totals && ! OPT_liball ? 
	    @Counts["TOTAL:"] = count() : 1;
 }

 /*
  * Print return data
  */
 /* print 3 arg output - default */
 '$probe_return'
 /self->start[probefunc,fdepth[probefunc]]/
 {
        /* fetch function depth */
        this->fdepth = fdepth[probefunc];

	/* calculate elapsed time */
	this->elapsed = timestamp - self->start[probefunc,this->fdepth];
	self->start[probefunc,this->fdepth] = 0;
	this->cpu = vtimestamp - self->vstart[probefunc,this->fdepth];
	self->vstart[probefunc,this->fdepth] = 0;

	/* save elapsed times */
	OPT_elapsed && OPT_liball ? 
	    @Elapsed[probemod,probefunc] = sum(this->elapsed) : 1;
	OPT_elapsed && ! OPT_liball ? 
	    @Elapsed[probefunc] = sum(this->elapsed) : 1;
	OPT_elapsed && OPT_totals && OPT_liball ? 
	    @Elapsed["TOTAL:",""] = sum(this->elapsed) : 1;
	OPT_elapsed && OPT_totals && ! OPT_liball ? 
	    @Elapsed["TOTAL:"] = sum(this->elapsed) : 1;

	/* save cpu times */
	OPT_cpu && OPT_liball ? @CPU[probemod,probefunc] = sum(this->cpu) : 1;
	OPT_cpu && ! OPT_liball ? @CPU[probefunc] = sum(this->cpu) : 1;
	OPT_cpu && OPT_totals && OPT_liball ? 
	    @CPU["TOTAL:",""] = sum(this->cpu) : 1;
	OPT_cpu && OPT_totals && ! OPT_liball ? 
	    @CPU["TOTAL:"] = sum(this->cpu) : 1;
	
 }

 /* print counts */
 dtrace:::END
 {
	/* print counts */
	OPT_counts ? printf("\n%-49s %16s\n","CALL","COUNT") : 1;
	OPT_counts && OPT_liball ? printa("%-16s %-32s %@16d\n",@Counts) : 1;
	OPT_counts && ! OPT_liball ? printa("%-49s %@16d\n",@Counts) : 1;

	/* print elapsed times */
	OPT_elapsed ? printf("\n%-49s %16s\n","CALL","ELAPSED") : 1;
	OPT_elapsed && OPT_liball ? printa("%-16s %-32s %@16d\n",@Elapsed) : 1;
	OPT_elapsed && ! OPT_liball ? printa("%-49s %@16d\n",@Elapsed) : 1;

	/* print cpu times */
	OPT_cpu ? printf("\n%-49s %16s\n","CALL","CPU") : 1;
	OPT_cpu && OPT_liball ? printa("%-16s %-32s %@16d\n",@CPU) : 1;
	OPT_cpu && ! OPT_liball ? printa("%-49s %@16d\n",@CPU) : 1;
 }
'

### Run DTrace
if [ $opt_command -eq 1 ]; then
	/usr/sbin/dtrace -x dynvarsize=$buf -x evaltime=exec -n "$dtrace" \
	    -c "$command" >&2
else
	/usr/sbin/dtrace -x dynvarsize=$buf -n "$dtrace" -p "$pid" >&2
fi