tools/perf/util/trace-event-parse.c

   1 /*
   2  * Copyright (C) 2009, Steven Rostedt <srostedt@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 <errno.h>
  25
  26 #include "../perf.h"
  27 #include "debug.h"
  28 #include "trace-event.h"
  29
  30 #include "sane_ctype.h"
  31
  32 static int get_common_field(struct scripting_context *context,
  33                             int *offset, int *size, const char *type)
  34 {
  35         struct pevent *pevent = context->pevent;
  36         struct event_format *event;
  37         struct format_field *field;
  38
  39         if (!*size) {
  40                 if (!pevent->events)
  41                         return 0;
  42
  43                 event = pevent->events[0];
  44                 field = pevent_find_common_field(event, type);
  45                 if (!field)
  46                         return 0;
  47                 *offset = field->offset;
  48                 *size = field->size;
  49         }
  50
  51         return pevent_read_number(pevent, context->event_data + *offset, *size);
  52 }
  53
  54 int common_lock_depth(struct scripting_context *context)
  55 {
  56         static int offset;
  57         static int size;
  58         int ret;
  59
  60         ret = get_common_field(context, &size, &offset,
  61                                "common_lock_depth");
  62         if (ret < 0)
  63                 return -1;
  64
  65         return ret;
  66 }
  67
  68 int common_flags(struct scripting_context *context)
  69 {
  70         static int offset;
  71         static int size;
  72         int ret;
  73
  74         ret = get_common_field(context, &size, &offset,
  75                                "common_flags");
  76         if (ret < 0)
  77                 return -1;
  78
  79         return ret;
  80 }
  81
  82 int common_pc(struct scripting_context *context)
  83 {
  84         static int offset;
  85         static int size;
  86         int ret;
  87
  88         ret = get_common_field(context, &size, &offset,
  89                                "common_preempt_count");
  90         if (ret < 0)
  91                 return -1;
  92
  93         return ret;
  94 }
  95
  96 unsigned long long
  97 raw_field_value(struct event_format *event, const char *name, void *data)
  98 {
  99         struct format_field *field;
 100         unsigned long long val;
 101
 102         field = pevent_find_any_field(event, name);
 103         if (!field)
 104                 return 0ULL;
 105
 106         pevent_read_number_field(field, data, &val);
 107
 108         return val;
 109 }
 110
 111 unsigned long long read_size(struct event_format *event, void *ptr, int size)
 112 {
 113         return pevent_read_number(event->pevent, ptr, size);
 114 }
 115
 116 void event_format__fprintf(struct event_format *event,
 117                            int cpu, void *data, int size, FILE *fp)
 118 {
 119         struct pevent_record record;
 120         struct trace_seq s;
 121
 122         memset(&record, 0, sizeof(record));
 123         record.cpu = cpu;
 124         record.size = size;
 125         record.data = data;
 126
 127         trace_seq_init(&s);
 128         pevent_event_info(&s, event, &record);
 129         trace_seq_do_fprintf(&s, fp);
 130         trace_seq_destroy(&s);
 131 }
 132
 133 void event_format__print(struct event_format *event,
 134                          int cpu, void *data, int size)
 135 {
 136         return event_format__fprintf(event, cpu, data, size, stdout);
 137 }
 138
 139 void parse_ftrace_printk(struct pevent *pevent,
 140                          char *file, unsigned int size __maybe_unused)
 141 {
 142         unsigned long long addr;
 143         char *printk;
 144         char *line;
 145         char *next = NULL;
 146         char *addr_str;
 147         char *fmt = NULL;
 148
 149         line = strtok_r(file, "\n", &next);
 150         while (line) {
 151                 addr_str = strtok_r(line, ":", &fmt);
 152                 if (!addr_str) {
 153                         pr_warning("printk format with empty entry");
 154                         break;
 155                 }
 156                 addr = strtoull(addr_str, NULL, 16);
 157                 /* fmt still has a space, skip it */
 158                 printk = strdup(fmt+1);
 159                 line = strtok_r(NULL, "\n", &next);
 160                 pevent_register_print_string(pevent, printk, addr);
 161         }
 162 }
 163
 164 void parse_saved_cmdline(struct pevent *pevent,
 165                          char *file, unsigned int size __maybe_unused)
 166 {
 167         char *comm;
 168         char *line;
 169         char *next = NULL;
 170         int pid;
 171
 172         line = strtok_r(file, "\n", &next);
 173         while (line) {
 174                 sscanf(line, "%d %ms", &pid, &comm);
 175                 pevent_register_comm(pevent, comm, pid);
 176                 free(comm);
 177                 line = strtok_r(NULL, "\n", &next);
 178         }
 179 }
 180
 181 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
 182 {
 183         return pevent_parse_event(pevent, buf, size, "ftrace");
 184 }
 185
 186 int parse_event_file(struct pevent *pevent,
 187                      char *buf, unsigned long size, char *sys)
 188 {
 189         return pevent_parse_event(pevent, buf, size, sys);
 190 }
 191
 192 struct event_format *trace_find_next_event(struct pevent *pevent,
 193                                            struct event_format *event)
 194 {
 195         static int idx;
 196
 197         if (!pevent || !pevent->events)
 198                 return NULL;
 199
 200         if (!event) {
 201                 idx = 0;
 202                 return pevent->events[0];
 203         }
 204
 205         if (idx < pevent->nr_events && event == pevent->events[idx]) {
 206                 idx++;
 207                 if (idx == pevent->nr_events)
 208                         return NULL;
 209                 return pevent->events[idx];
 210         }
 211
 212         for (idx = 1; idx < pevent->nr_events; idx++) {
 213                 if (event == pevent->events[idx - 1])
 214                         return pevent->events[idx];
 215         }
 216         return NULL;
 217 }
 218
 219 struct flag {
 220         const char *name;
 221         unsigned long long value;
 222 };
 223
 224 static const struct flag flags[] = {
 225         { "HI_SOFTIRQ", 0 },
 226         { "TIMER_SOFTIRQ", 1 },
 227         { "NET_TX_SOFTIRQ", 2 },
 228         { "NET_RX_SOFTIRQ", 3 },
 229         { "BLOCK_SOFTIRQ", 4 },
 230         { "IRQ_POLL_SOFTIRQ", 5 },
 231         { "TASKLET_SOFTIRQ", 6 },
 232         { "SCHED_SOFTIRQ", 7 },
 233         { "HRTIMER_SOFTIRQ", 8 },
 234         { "RCU_SOFTIRQ", 9 },
 235
 236         { "HRTIMER_NORESTART", 0 },
 237         { "HRTIMER_RESTART", 1 },
 238 };
 239
 240 unsigned long long eval_flag(const char *flag)
 241 {
 242         int i;
 243
 244         /*
 245          * Some flags in the format files do not get converted.
 246          * If the flag is not numeric, see if it is something that
 247          * we already know about.
 248          */
 249         if (isdigit(flag[0]))
 250                 return strtoull(flag, NULL, 0);
 251
 252         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
 253                 if (strcmp(flags[i].name, flag) == 0)
 254                         return flags[i].value;
 255
 256         return 0;
 257 }