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 tep_handle *pevent = context->pevent;
  36         struct tep_event *event;
  37         struct tep_format_field *field;
  38
  39         if (!*size) {
  40
  41                 event = tep_get_first_event(pevent);
  42                 if (!event)
  43                         return 0;
  44
  45                 field = tep_find_common_field(event, type);
  46                 if (!field)
  47                         return 0;
  48                 *offset = field->offset;
  49                 *size = field->size;
  50         }
  51
  52         return tep_read_number(pevent, context->event_data + *offset, *size);
  53 }
  54
  55 int common_lock_depth(struct scripting_context *context)
  56 {
  57         static int offset;
  58         static int size;
  59         int ret;
  60
  61         ret = get_common_field(context, &size, &offset,
  62                                "common_lock_depth");
  63         if (ret < 0)
  64                 return -1;
  65
  66         return ret;
  67 }
  68
  69 int common_flags(struct scripting_context *context)
  70 {
  71         static int offset;
  72         static int size;
  73         int ret;
  74
  75         ret = get_common_field(context, &size, &offset,
  76                                "common_flags");
  77         if (ret < 0)
  78                 return -1;
  79
  80         return ret;
  81 }
  82
  83 int common_pc(struct scripting_context *context)
  84 {
  85         static int offset;
  86         static int size;
  87         int ret;
  88
  89         ret = get_common_field(context, &size, &offset,
  90                                "common_preempt_count");
  91         if (ret < 0)
  92                 return -1;
  93
  94         return ret;
  95 }
  96
  97 unsigned long long
  98 raw_field_value(struct tep_event *event, const char *name, void *data)
  99 {
 100         struct tep_format_field *field;
 101         unsigned long long val;
 102
 103         field = tep_find_any_field(event, name);
 104         if (!field)
 105                 return 0ULL;
 106
 107         tep_read_number_field(field, data, &val);
 108
 109         return val;
 110 }
 111
 112 unsigned long long read_size(struct tep_event *event, void *ptr, int size)
 113 {
 114         return tep_read_number(event->pevent, ptr, size);
 115 }
 116
 117 void event_format__fprintf(struct tep_event *event,
 118                            int cpu, void *data, int size, FILE *fp)
 119 {
 120         struct tep_record record;
 121         struct trace_seq s;
 122
 123         memset(&record, 0, sizeof(record));
 124         record.cpu = cpu;
 125         record.size = size;
 126         record.data = data;
 127
 128         trace_seq_init(&s);
 129         tep_event_info(&s, event, &record);
 130         trace_seq_do_fprintf(&s, fp);
 131         trace_seq_destroy(&s);
 132 }
 133
 134 void event_format__print(struct tep_event *event,
 135                          int cpu, void *data, int size)
 136 {
 137         return event_format__fprintf(event, cpu, data, size, stdout);
 138 }
 139
 140 void parse_ftrace_printk(struct tep_handle *pevent,
 141                          char *file, unsigned int size __maybe_unused)
 142 {
 143         unsigned long long addr;
 144         char *printk;
 145         char *line;
 146         char *next = NULL;
 147         char *addr_str;
 148         char *fmt = NULL;
 149
 150         line = strtok_r(file, "\n", &next);
 151         while (line) {
 152                 addr_str = strtok_r(line, ":", &fmt);
 153                 if (!addr_str) {
 154                         pr_warning("printk format with empty entry");
 155                         break;
 156                 }
 157                 addr = strtoull(addr_str, NULL, 16);
 158                 /* fmt still has a space, skip it */
 159                 printk = strdup(fmt+1);
 160                 line = strtok_r(NULL, "\n", &next);
 161                 tep_register_print_string(pevent, printk, addr);
 162                 free(printk);
 163         }
 164 }
 165
 166 void parse_saved_cmdline(struct tep_handle *pevent,
 167                          char *file, unsigned int size __maybe_unused)
 168 {
 169         char comm[17]; /* Max comm length in the kernel is 16. */
 170         char *line;
 171         char *next = NULL;
 172         int pid;
 173
 174         line = strtok_r(file, "\n", &next);
 175         while (line) {
 176                 if (sscanf(line, "%d %16s", &pid, comm) == 2)
 177                         tep_register_comm(pevent, comm, pid);
 178                 line = strtok_r(NULL, "\n", &next);
 179         }
 180 }
 181
 182 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
 183 {
 184         return tep_parse_event(pevent, buf, size, "ftrace");
 185 }
 186
 187 int parse_event_file(struct tep_handle *pevent,
 188                      char *buf, unsigned long size, char *sys)
 189 {
 190         return tep_parse_event(pevent, buf, size, sys);
 191 }
 192
 193 struct tep_event *trace_find_next_event(struct tep_handle *pevent,
 194                                         struct tep_event *event)
 195 {
 196         static int idx;
 197         int events_count;
 198         struct tep_event *all_events;
 199
 200         all_events = tep_get_first_event(pevent);
 201         events_count = tep_get_events_count(pevent);
 202         if (!pevent || !all_events || events_count < 1)
 203                 return NULL;
 204
 205         if (!event) {
 206                 idx = 0;
 207                 return all_events;
 208         }
 209
 210         if (idx < events_count && event == (all_events + idx)) {
 211                 idx++;
 212                 if (idx == events_count)
 213                         return NULL;
 214                 return (all_events + idx);
 215         }
 216
 217         for (idx = 1; idx < events_count; idx++) {
 218                 if (event == (all_events + (idx - 1)))
 219                         return (all_events + idx);
 220         }
 221         return NULL;
 222 }
 223
 224 struct flag {
 225         const char *name;
 226         unsigned long long value;
 227 };
 228
 229 static const struct flag flags[] = {
 230         { "HI_SOFTIRQ", 0 },
 231         { "TIMER_SOFTIRQ", 1 },
 232         { "NET_TX_SOFTIRQ", 2 },
 233         { "NET_RX_SOFTIRQ", 3 },
 234         { "BLOCK_SOFTIRQ", 4 },
 235         { "IRQ_POLL_SOFTIRQ", 5 },
 236         { "TASKLET_SOFTIRQ", 6 },
 237         { "SCHED_SOFTIRQ", 7 },
 238         { "HRTIMER_SOFTIRQ", 8 },
 239         { "RCU_SOFTIRQ", 9 },
 240
 241         { "HRTIMER_NORESTART", 0 },
 242         { "HRTIMER_RESTART", 1 },
 243 };
 244
 245 unsigned long long eval_flag(const char *flag)
 246 {
 247         int i;
 248
 249         /*
 250          * Some flags in the format files do not get converted.
 251          * If the flag is not numeric, see if it is something that
 252          * we already know about.
 253          */
 254         if (isdigit(flag[0]))
 255                 return strtoull(flag, NULL, 0);
 256
 257         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
 258                 if (strcmp(flags[i].name, flag) == 0)
 259                         return flags[i].value;
 260
 261         return 0;
 262 }