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      1 /*
      2  * trace-event-scripting.  Scripting engine common and initialization code.
      3  *
      4  * Copyright (C) 2009-2010 Tom Zanussi <tzanussi (at) gmail.com>
      5  *
      6  *  This program is free software; you can redistribute it and/or modify
      7  *  it under the terms of the GNU General Public License as published by
      8  *  the Free Software Foundation; either version 2 of the License, or
      9  *  (at your option) any later version.
     10  *
     11  *  This program is distributed in the hope that it will be useful,
     12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14  *  GNU General Public License for more details.
     15  *
     16  *  You should have received a copy of the GNU General Public License
     17  *  along with this program; if not, write to the Free Software
     18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     19  *
     20  */
     21 
     22 #include <stdio.h>
     23 #include <stdlib.h>
     24 #include <string.h>
     25 #include <ctype.h>
     26 #include <errno.h>
     27 
     28 #include "../perf.h"
     29 #include "util.h"
     30 #include "trace-event.h"
     31 
     32 struct scripting_context *scripting_context;
     33 
     34 static int stop_script_unsupported(void)
     35 {
     36 	return 0;
     37 }
     38 
     39 static void process_event_unsupported(union perf_event *event __unused,
     40 				      struct perf_sample *sample __unused,
     41 				      struct perf_evsel *evsel __unused,
     42 				      struct perf_session *session __unused,
     43 				      struct thread *thread __unused)
     44 {
     45 }
     46 
     47 static void print_python_unsupported_msg(void)
     48 {
     49 	fprintf(stderr, "Python scripting not supported."
     50 		"  Install libpython and rebuild perf to enable it.\n"
     51 		"For example:\n  # apt-get install python-dev (ubuntu)"
     52 		"\n  # yum install python-devel (Fedora)"
     53 		"\n  etc.\n");
     54 }
     55 
     56 static int python_start_script_unsupported(const char *script __unused,
     57 					   int argc __unused,
     58 					   const char **argv __unused)
     59 {
     60 	print_python_unsupported_msg();
     61 
     62 	return -1;
     63 }
     64 
     65 static int python_generate_script_unsupported(const char *outfile __unused)
     66 {
     67 	print_python_unsupported_msg();
     68 
     69 	return -1;
     70 }
     71 
     72 struct scripting_ops python_scripting_unsupported_ops = {
     73 	.name = "Python",
     74 	.start_script = python_start_script_unsupported,
     75 	.stop_script = stop_script_unsupported,
     76 	.process_event = process_event_unsupported,
     77 	.generate_script = python_generate_script_unsupported,
     78 };
     79 
     80 static void register_python_scripting(struct scripting_ops *scripting_ops)
     81 {
     82 	int err;
     83 	err = script_spec_register("Python", scripting_ops);
     84 	if (err)
     85 		die("error registering Python script extension");
     86 
     87 	err = script_spec_register("py", scripting_ops);
     88 	if (err)
     89 		die("error registering py script extension");
     90 
     91 	scripting_context = malloc(sizeof(struct scripting_context));
     92 }
     93 
     94 #ifdef NO_LIBPYTHON
     95 void setup_python_scripting(void)
     96 {
     97 	register_python_scripting(&python_scripting_unsupported_ops);
     98 }
     99 #else
    100 extern struct scripting_ops python_scripting_ops;
    101 
    102 void setup_python_scripting(void)
    103 {
    104 	register_python_scripting(&python_scripting_ops);
    105 }
    106 #endif
    107 
    108 static void print_perl_unsupported_msg(void)
    109 {
    110 	fprintf(stderr, "Perl scripting not supported."
    111 		"  Install libperl and rebuild perf to enable it.\n"
    112 		"For example:\n  # apt-get install libperl-dev (ubuntu)"
    113 		"\n  # yum install 'perl(ExtUtils::Embed)' (Fedora)"
    114 		"\n  etc.\n");
    115 }
    116 
    117 static int perl_start_script_unsupported(const char *script __unused,
    118 					 int argc __unused,
    119 					 const char **argv __unused)
    120 {
    121 	print_perl_unsupported_msg();
    122 
    123 	return -1;
    124 }
    125 
    126 static int perl_generate_script_unsupported(const char *outfile __unused)
    127 {
    128 	print_perl_unsupported_msg();
    129 
    130 	return -1;
    131 }
    132 
    133 struct scripting_ops perl_scripting_unsupported_ops = {
    134 	.name = "Perl",
    135 	.start_script = perl_start_script_unsupported,
    136 	.stop_script = stop_script_unsupported,
    137 	.process_event = process_event_unsupported,
    138 	.generate_script = perl_generate_script_unsupported,
    139 };
    140 
    141 static void register_perl_scripting(struct scripting_ops *scripting_ops)
    142 {
    143 	int err;
    144 	err = script_spec_register("Perl", scripting_ops);
    145 	if (err)
    146 		die("error registering Perl script extension");
    147 
    148 	err = script_spec_register("pl", scripting_ops);
    149 	if (err)
    150 		die("error registering pl script extension");
    151 
    152 	scripting_context = malloc(sizeof(struct scripting_context));
    153 }
    154 
    155 #ifdef NO_LIBPERL
    156 void setup_perl_scripting(void)
    157 {
    158 	register_perl_scripting(&perl_scripting_unsupported_ops);
    159 }
    160 #else
    161 extern struct scripting_ops perl_scripting_ops;
    162 
    163 void setup_perl_scripting(void)
    164 {
    165 	register_perl_scripting(&perl_scripting_ops);
    166 }
    167 #endif
    168