1 /* 2 * Copyright (C) 2009, Steven Rostedt <srostedt (at) redhat.com> 3 * 4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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; version 2 of the License (not later!) 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 20 */ 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <ctype.h> 25 #include <errno.h> 26 27 #include "../perf.h" 28 #include "util.h" 29 #include "trace-event.h" 30 31 struct pevent *read_trace_init(int file_bigendian, int host_bigendian) 32 { 33 struct pevent *pevent = pevent_alloc(); 34 35 if (pevent != NULL) { 36 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); 37 pevent_set_file_bigendian(pevent, file_bigendian); 38 pevent_set_host_bigendian(pevent, host_bigendian); 39 } 40 41 return pevent; 42 } 43 44 static int get_common_field(struct scripting_context *context, 45 int *offset, int *size, const char *type) 46 { 47 struct pevent *pevent = context->pevent; 48 struct event_format *event; 49 struct format_field *field; 50 51 if (!*size) { 52 if (!pevent->events) 53 return 0; 54 55 event = pevent->events[0]; 56 field = pevent_find_common_field(event, type); 57 if (!field) 58 return 0; 59 *offset = field->offset; 60 *size = field->size; 61 } 62 63 return pevent_read_number(pevent, context->event_data + *offset, *size); 64 } 65 66 int common_lock_depth(struct scripting_context *context) 67 { 68 static int offset; 69 static int size; 70 int ret; 71 72 ret = get_common_field(context, &size, &offset, 73 "common_lock_depth"); 74 if (ret < 0) 75 return -1; 76 77 return ret; 78 } 79 80 int common_flags(struct scripting_context *context) 81 { 82 static int offset; 83 static int size; 84 int ret; 85 86 ret = get_common_field(context, &size, &offset, 87 "common_flags"); 88 if (ret < 0) 89 return -1; 90 91 return ret; 92 } 93 94 int common_pc(struct scripting_context *context) 95 { 96 static int offset; 97 static int size; 98 int ret; 99 100 ret = get_common_field(context, &size, &offset, 101 "common_preempt_count"); 102 if (ret < 0) 103 return -1; 104 105 return ret; 106 } 107 108 unsigned long long 109 raw_field_value(struct event_format *event, const char *name, void *data) 110 { 111 struct format_field *field; 112 unsigned long long val; 113 114 field = pevent_find_any_field(event, name); 115 if (!field) 116 return 0ULL; 117 118 pevent_read_number_field(field, data, &val); 119 120 return val; 121 } 122 123 void *raw_field_ptr(struct event_format *event, const char *name, void *data) 124 { 125 struct format_field *field; 126 127 field = pevent_find_any_field(event, name); 128 if (!field) 129 return NULL; 130 131 if (field->flags & FIELD_IS_DYNAMIC) { 132 int offset; 133 134 offset = *(int *)(data + field->offset); 135 offset &= 0xffff; 136 137 return data + offset; 138 } 139 140 return data + field->offset; 141 } 142 143 int trace_parse_common_type(struct pevent *pevent, void *data) 144 { 145 struct pevent_record record; 146 147 record.data = data; 148 return pevent_data_type(pevent, &record); 149 } 150 151 int trace_parse_common_pid(struct pevent *pevent, void *data) 152 { 153 struct pevent_record record; 154 155 record.data = data; 156 return pevent_data_pid(pevent, &record); 157 } 158 159 unsigned long long read_size(struct event_format *event, void *ptr, int size) 160 { 161 return pevent_read_number(event->pevent, ptr, size); 162 } 163 164 void event_format__print(struct event_format *event, 165 int cpu, void *data, int size) 166 { 167 struct pevent_record record; 168 struct trace_seq s; 169 170 memset(&record, 0, sizeof(record)); 171 record.cpu = cpu; 172 record.size = size; 173 record.data = data; 174 175 trace_seq_init(&s); 176 pevent_event_info(&s, event, &record); 177 trace_seq_do_printf(&s); 178 } 179 180 void parse_proc_kallsyms(struct pevent *pevent, 181 char *file, unsigned int size __maybe_unused) 182 { 183 unsigned long long addr; 184 char *func; 185 char *line; 186 char *next = NULL; 187 char *addr_str; 188 char *mod; 189 char *fmt = NULL; 190 191 line = strtok_r(file, "\n", &next); 192 while (line) { 193 mod = NULL; 194 addr_str = strtok_r(line, " ", &fmt); 195 addr = strtoull(addr_str, NULL, 16); 196 /* skip character */ 197 strtok_r(NULL, " ", &fmt); 198 func = strtok_r(NULL, "\t", &fmt); 199 mod = strtok_r(NULL, "]", &fmt); 200 /* truncate the extra '[' */ 201 if (mod) 202 mod = mod + 1; 203 204 pevent_register_function(pevent, func, addr, mod); 205 206 line = strtok_r(NULL, "\n", &next); 207 } 208 } 209 210 void parse_ftrace_printk(struct pevent *pevent, 211 char *file, unsigned int size __maybe_unused) 212 { 213 unsigned long long addr; 214 char *printk; 215 char *line; 216 char *next = NULL; 217 char *addr_str; 218 char *fmt; 219 220 line = strtok_r(file, "\n", &next); 221 while (line) { 222 addr_str = strtok_r(line, ":", &fmt); 223 if (!addr_str) { 224 warning("printk format with empty entry"); 225 break; 226 } 227 addr = strtoull(addr_str, NULL, 16); 228 /* fmt still has a space, skip it */ 229 printk = strdup(fmt+1); 230 line = strtok_r(NULL, "\n", &next); 231 pevent_register_print_string(pevent, printk, addr); 232 } 233 } 234 235 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size) 236 { 237 return pevent_parse_event(pevent, buf, size, "ftrace"); 238 } 239 240 int parse_event_file(struct pevent *pevent, 241 char *buf, unsigned long size, char *sys) 242 { 243 return pevent_parse_event(pevent, buf, size, sys); 244 } 245 246 struct event_format *trace_find_next_event(struct pevent *pevent, 247 struct event_format *event) 248 { 249 static int idx; 250 251 if (!pevent || !pevent->events) 252 return NULL; 253 254 if (!event) { 255 idx = 0; 256 return pevent->events[0]; 257 } 258 259 if (idx < pevent->nr_events && event == pevent->events[idx]) { 260 idx++; 261 if (idx == pevent->nr_events) 262 return NULL; 263 return pevent->events[idx]; 264 } 265 266 for (idx = 1; idx < pevent->nr_events; idx++) { 267 if (event == pevent->events[idx - 1]) 268 return pevent->events[idx]; 269 } 270 return NULL; 271 } 272 273 struct flag { 274 const char *name; 275 unsigned long long value; 276 }; 277 278 static const struct flag flags[] = { 279 { "HI_SOFTIRQ", 0 }, 280 { "TIMER_SOFTIRQ", 1 }, 281 { "NET_TX_SOFTIRQ", 2 }, 282 { "NET_RX_SOFTIRQ", 3 }, 283 { "BLOCK_SOFTIRQ", 4 }, 284 { "BLOCK_IOPOLL_SOFTIRQ", 5 }, 285 { "TASKLET_SOFTIRQ", 6 }, 286 { "SCHED_SOFTIRQ", 7 }, 287 { "HRTIMER_SOFTIRQ", 8 }, 288 { "RCU_SOFTIRQ", 9 }, 289 290 { "HRTIMER_NORESTART", 0 }, 291 { "HRTIMER_RESTART", 1 }, 292 }; 293 294 unsigned long long eval_flag(const char *flag) 295 { 296 int i; 297 298 /* 299 * Some flags in the format files do not get converted. 300 * If the flag is not numeric, see if it is something that 301 * we already know about. 302 */ 303 if (isdigit(flag[0])) 304 return strtoull(flag, NULL, 0); 305 306 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++) 307 if (strcmp(flags[i].name, flag) == 0) 308 return flags[i].value; 309 310 return 0; 311 } 312
