1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * trace-event-scripting. Scripting engine common and initialization code. 4 * 5 * Copyright (C) 2009-2010 Tom Zanussi <tzanussi@gmail.com> 6 */ 7 8 #include <stdio.h> 9 #include <stdlib.h> 10 #include <string.h> 11 #include <errno.h> 12 #include <traceevent/event-parse.h> 13 14 #include "debug.h" 15 #include "trace-event.h" 16 #include "evsel.h" 17 #include <linux/zalloc.h> 18 #include "util/sample.h" 19 20 struct scripting_context *scripting_context; 21 22 void scripting_context__update(struct scripting_context *c, 23 union perf_event *event, 24 struct perf_sample *sample, 25 struct evsel *evsel, 26 struct addr_location *al, 27 struct addr_location *addr_al) 28 { 29 c->event_data = sample->raw_data; 30 if (evsel->tp_format) 31 c->pevent = evsel->tp_format->tep; 32 else 33 c->pevent = NULL; 34 c->event = event; 35 c->sample = sample; 36 c->evsel = evsel; 37 c->al = al; 38 c->addr_al = addr_al; 39 } 40 41 static int flush_script_unsupported(void) 42 { 43 return 0; 44 } 45 46 static int stop_script_unsupported(void) 47 { 48 return 0; 49 } 50 51 static void process_event_unsupported(union perf_event *event __maybe_unused, 52 struct perf_sample *sample __maybe_unused, 53 struct evsel *evsel __maybe_unused, 54 struct addr_location *al __maybe_unused, 55 struct addr_location *addr_al __maybe_unused) 56 { 57 } 58 59 static void print_python_unsupported_msg(void) 60 { 61 fprintf(stderr, "Python scripting not supported." 62 " Install libpython and rebuild perf to enable it.\n" 63 "For example:\n # apt-get install python-dev (ubuntu)" 64 "\n # yum install python-devel (Fedora)" 65 "\n etc.\n"); 66 } 67 68 static int python_start_script_unsupported(const char *script __maybe_unused, 69 int argc __maybe_unused, 70 const char **argv __maybe_unused, 71 struct perf_session *session __maybe_unused) 72 { 73 print_python_unsupported_msg(); 74 75 return -1; 76 } 77 78 static int python_generate_script_unsupported(struct tep_handle *pevent 79 __maybe_unused, 80 const char *outfile 81 __maybe_unused) 82 { 83 print_python_unsupported_msg(); 84 85 return -1; 86 } 87 88 struct scripting_ops python_scripting_unsupported_ops = { 89 .name = "Python", 90 .dirname = "python", 91 .start_script = python_start_script_unsupported, 92 .flush_script = flush_script_unsupported, 93 .stop_script = stop_script_unsupported, 94 .process_event = process_event_unsupported, 95 .generate_script = python_generate_script_unsupported, 96 }; 97 98 static void register_python_scripting(struct scripting_ops *scripting_ops) 99 { 100 if (scripting_context == NULL) 101 scripting_context = malloc(sizeof(*scripting_context)); 102 103 if (scripting_context == NULL || 104 script_spec_register("Python", scripting_ops) || 105 script_spec_register("py", scripting_ops)) { 106 pr_err("Error registering Python script extension: disabling it\n"); 107 zfree(&scripting_context); 108 } 109 } 110 111 #ifndef HAVE_LIBPYTHON_SUPPORT 112 void setup_python_scripting(void) 113 { 114 register_python_scripting(&python_scripting_unsupported_ops); 115 } 116 #else 117 extern struct scripting_ops python_scripting_ops; 118 119 void setup_python_scripting(void) 120 { 121 register_python_scripting(&python_scripting_ops); 122 } 123 #endif 124 125 static void print_perl_unsupported_msg(void) 126 { 127 fprintf(stderr, "Perl scripting not supported." 128 " Install libperl and rebuild perf to enable it.\n" 129 "For example:\n # apt-get install libperl-dev (ubuntu)" 130 "\n # yum install 'perl(ExtUtils::Embed)' (Fedora)" 131 "\n etc.\n"); 132 } 133 134 static int perl_start_script_unsupported(const char *script __maybe_unused, 135 int argc __maybe_unused, 136 const char **argv __maybe_unused, 137 struct perf_session *session __maybe_unused) 138 { 139 print_perl_unsupported_msg(); 140 141 return -1; 142 } 143 144 static int perl_generate_script_unsupported(struct tep_handle *pevent 145 __maybe_unused, 146 const char *outfile __maybe_unused) 147 { 148 print_perl_unsupported_msg(); 149 150 return -1; 151 } 152 153 struct scripting_ops perl_scripting_unsupported_ops = { 154 .name = "Perl", 155 .dirname = "perl", 156 .start_script = perl_start_script_unsupported, 157 .flush_script = flush_script_unsupported, 158 .stop_script = stop_script_unsupported, 159 .process_event = process_event_unsupported, 160 .generate_script = perl_generate_script_unsupported, 161 }; 162 163 static void register_perl_scripting(struct scripting_ops *scripting_ops) 164 { 165 if (scripting_context == NULL) 166 scripting_context = malloc(sizeof(*scripting_context)); 167 168 if (scripting_context == NULL || 169 script_spec_register("Perl", scripting_ops) || 170 script_spec_register("pl", scripting_ops)) { 171 pr_err("Error registering Perl script extension: disabling it\n"); 172 zfree(&scripting_context); 173 } 174 } 175 176 #ifndef HAVE_LIBPERL_SUPPORT 177 void setup_perl_scripting(void) 178 { 179 register_perl_scripting(&perl_scripting_unsupported_ops); 180 } 181 #else 182 extern struct scripting_ops perl_scripting_ops; 183 184 void setup_perl_scripting(void) 185 { 186 register_perl_scripting(&perl_scripting_ops); 187 } 188 #endif 189