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 <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 unsigned long long read_size(struct event_format *event, void *ptr, int size)
 124 {
 125         return pevent_read_number(event->pevent, ptr, size);
 126 }
 127
 128 void event_format__print(struct event_format *event,
 129                          int cpu, void *data, int size)
 130 {
 131         struct pevent_record record;
 132         struct trace_seq s;
 133
 134         memset(&record, 0, sizeof(record));
 135         record.cpu = cpu;
 136         record.size = size;
 137         record.data = data;
 138
 139         trace_seq_init(&s);
 140         pevent_event_info(&s, event, &record);
 141         trace_seq_do_printf(&s);
 142 }
 143
 144 void parse_proc_kallsyms(struct pevent *pevent,
 145                          char *file, unsigned int size __maybe_unused)
 146 {
 147         unsigned long long addr;
 148         char *func;
 149         char *line;
 150         char *next = NULL;
 151         char *addr_str;
 152         char *mod;
 153         char *fmt = NULL;
 154
 155         line = strtok_r(file, "\n", &next);
 156         while (line) {
 157                 mod = NULL;
 158                 addr_str = strtok_r(line, " ", &fmt);
 159                 addr = strtoull(addr_str, NULL, 16);
 160                 /* skip character */
 161                 strtok_r(NULL, " ", &fmt);
 162                 func = strtok_r(NULL, "\t", &fmt);
 163                 mod = strtok_r(NULL, "]", &fmt);
 164                 /* truncate the extra '[' */
 165                 if (mod)
 166                         mod = mod + 1;
 167
 168                 pevent_register_function(pevent, func, addr, mod);
 169
 170                 line = strtok_r(NULL, "\n", &next);
 171         }
 172 }
 173
 174 void parse_ftrace_printk(struct pevent *pevent,
 175                          char *file, unsigned int size __maybe_unused)
 176 {
 177         unsigned long long addr;
 178         char *printk;
 179         char *line;
 180         char *next = NULL;
 181         char *addr_str;
 182         char *fmt;
 183
 184         line = strtok_r(file, "\n", &next);
 185         while (line) {
 186                 addr_str = strtok_r(line, ":", &fmt);
 187                 if (!addr_str) {
 188                         warning("printk format with empty entry");
 189                         break;
 190                 }
 191                 addr = strtoull(addr_str, NULL, 16);
 192                 /* fmt still has a space, skip it */
 193                 printk = strdup(fmt+1);
 194                 line = strtok_r(NULL, "\n", &next);
 195                 pevent_register_print_string(pevent, printk, addr);
 196         }
 197 }
 198
 199 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
 200 {
 201         return pevent_parse_event(pevent, buf, size, "ftrace");
 202 }
 203
 204 int parse_event_file(struct pevent *pevent,
 205                      char *buf, unsigned long size, char *sys)
 206 {
 207         return pevent_parse_event(pevent, buf, size, sys);
 208 }
 209
 210 struct event_format *trace_find_next_event(struct pevent *pevent,
 211                                            struct event_format *event)
 212 {
 213         static int idx;
 214
 215         if (!pevent || !pevent->events)
 216                 return NULL;
 217
 218         if (!event) {
 219                 idx = 0;
 220                 return pevent->events[0];
 221         }
 222
 223         if (idx < pevent->nr_events && event == pevent->events[idx]) {
 224                 idx++;
 225                 if (idx == pevent->nr_events)
 226                         return NULL;
 227                 return pevent->events[idx];
 228         }
 229
 230         for (idx = 1; idx < pevent->nr_events; idx++) {
 231                 if (event == pevent->events[idx - 1])
 232                         return pevent->events[idx];
 233         }
 234         return NULL;
 235 }
 236
 237 struct flag {
 238         const char *name;
 239         unsigned long long value;
 240 };
 241
 242 static const struct flag flags[] = {
 243         { "HI_SOFTIRQ", 0 },
 244         { "TIMER_SOFTIRQ", 1 },
 245         { "NET_TX_SOFTIRQ", 2 },
 246         { "NET_RX_SOFTIRQ", 3 },
 247         { "BLOCK_SOFTIRQ", 4 },
 248         { "BLOCK_IOPOLL_SOFTIRQ", 5 },
 249         { "TASKLET_SOFTIRQ", 6 },
 250         { "SCHED_SOFTIRQ", 7 },
 251         { "HRTIMER_SOFTIRQ", 8 },
 252         { "RCU_SOFTIRQ", 9 },
 253
 254         { "HRTIMER_NORESTART", 0 },
 255         { "HRTIMER_RESTART", 1 },
 256 };
 257
 258 unsigned long long eval_flag(const char *flag)
 259 {
 260         int i;
 261
 262         /*
 263          * Some flags in the format files do not get converted.
 264          * If the flag is not numeric, see if it is something that
 265          * we already know about.
 266          */
 267         if (isdigit(flag[0]))
 268                 return strtoull(flag, NULL, 0);
 269
 270         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
 271                 if (strcmp(flags[i].name, flag) == 0)
 272                         return flags[i].value;
 273
 274         return 0;
 275 }