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