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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 <errno.h>
     26 
     27 #include "../perf.h"
     28 #include "util.h"
     29 #include "trace-event.h"
     30 
     31 struct scripting_context *scripting_context;
     32 
     33 static int stop_script_unsupported(void)
     34 {
     35 	return 0;
     36 }
     37 
     38 static void process_event_unsupported(union perf_event *event __maybe_unused,
     39 				      struct perf_sample *sample __maybe_unused,
     40 				      struct perf_evsel *evsel __maybe_unused,
     41 				      struct machine *machine __maybe_unused,
     42 				      struct thread *thread __maybe_unused,
     43 					  struct addr_location *al __maybe_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 __maybe_unused,
     57 					   int argc __maybe_unused,
     58 					   const char **argv __maybe_unused)
     59 {
     60 	print_python_unsupported_msg();
     61 
     62 	return -1;
     63 }
     64 
     65 static int python_generate_script_unsupported(struct pevent *pevent
     66 					      __maybe_unused,
     67 					      const char *outfile
     68 					      __maybe_unused)
     69 {
     70 	print_python_unsupported_msg();
     71 
     72 	return -1;
     73 }
     74 
     75 struct scripting_ops python_scripting_unsupported_ops = {
     76 	.name = "Python",
     77 	.start_script = python_start_script_unsupported,
     78 	.stop_script = stop_script_unsupported,
     79 	.process_event = process_event_unsupported,
     80 	.generate_script = python_generate_script_unsupported,
     81 };
     82 
     83 static void register_python_scripting(struct scripting_ops *scripting_ops)
     84 {
     85 	int err;
     86 	err = script_spec_register("Python", scripting_ops);
     87 	if (err)
     88 		die("error registering Python script extension");
     89 
     90 	err = script_spec_register("py", scripting_ops);
     91 	if (err)
     92 		die("error registering py script extension");
     93 
     94 	scripting_context = malloc(sizeof(struct scripting_context));
     95 }
     96 
     97 #ifdef NO_LIBPYTHON
     98 void setup_python_scripting(void)
     99 {
    100 	register_python_scripting(&python_scripting_unsupported_ops);
    101 }
    102 #else
    103 extern struct scripting_ops python_scripting_ops;
    104 
    105 void setup_python_scripting(void)
    106 {
    107 	register_python_scripting(&python_scripting_ops);
    108 }
    109 #endif
    110 
    111 static void print_perl_unsupported_msg(void)
    112 {
    113 	fprintf(stderr, "Perl scripting not supported."
    114 		"  Install libperl and rebuild perf to enable it.\n"
    115 		"For example:\n  # apt-get install libperl-dev (ubuntu)"
    116 		"\n  # yum install 'perl(ExtUtils::Embed)' (Fedora)"
    117 		"\n  etc.\n");
    118 }
    119 
    120 static int perl_start_script_unsupported(const char *script __maybe_unused,
    121 					 int argc __maybe_unused,
    122 					 const char **argv __maybe_unused)
    123 {
    124 	print_perl_unsupported_msg();
    125 
    126 	return -1;
    127 }
    128 
    129 static int perl_generate_script_unsupported(struct pevent *pevent
    130 					    __maybe_unused,
    131 					    const char *outfile __maybe_unused)
    132 {
    133 	print_perl_unsupported_msg();
    134 
    135 	return -1;
    136 }
    137 
    138 struct scripting_ops perl_scripting_unsupported_ops = {
    139 	.name = "Perl",
    140 	.start_script = perl_start_script_unsupported,
    141 	.stop_script = stop_script_unsupported,
    142 	.process_event = process_event_unsupported,
    143 	.generate_script = perl_generate_script_unsupported,
    144 };
    145 
    146 static void register_perl_scripting(struct scripting_ops *scripting_ops)
    147 {
    148 	int err;
    149 	err = script_spec_register("Perl", scripting_ops);
    150 	if (err)
    151 		die("error registering Perl script extension");
    152 
    153 	err = script_spec_register("pl", scripting_ops);
    154 	if (err)
    155 		die("error registering pl script extension");
    156 
    157 	scripting_context = malloc(sizeof(struct scripting_context));
    158 }
    159 
    160 #ifdef NO_LIBPERL
    161 void setup_perl_scripting(void)
    162 {
    163 	register_perl_scripting(&perl_scripting_unsupported_ops);
    164 }
    165 #else
    166 extern struct scripting_ops perl_scripting_ops;
    167 
    168 void setup_perl_scripting(void)
    169 {
    170 	register_perl_scripting(&perl_scripting_ops);
    171 }
    172 #endif
    173