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 static int get_common_field(struct scripting_context *context,
  32                             int *offset, int *size, const char *type)
  33 {
  34         struct pevent *pevent = context->pevent;
  35         struct event_format *event;
  36         struct format_field *field;
  37
  38         if (!*size) {
  39                 if (!pevent->events)
  40                         return 0;
  41
  42                 event = pevent->events[0];
  43                 field = pevent_find_common_field(event, type);
  44                 if (!field)
  45                         return 0;
  46                 *offset = field->offset;
  47                 *size = field->size;
  48         }
  49
  50         return pevent_read_number(pevent, context->event_data + *offset, *size);
  51 }
  52
  53 int common_lock_depth(struct scripting_context *context)
  54 {
  55         static int offset;
  56         static int size;
  57         int ret;
  58
  59         ret = get_common_field(context, &size, &offset,
  60                                "common_lock_depth");
  61         if (ret < 0)
  62                 return -1;
  63
  64         return ret;
  65 }
  66
  67 int common_flags(struct scripting_context *context)
  68 {
  69         static int offset;
  70         static int size;
  71         int ret;
  72
  73         ret = get_common_field(context, &size, &offset,
  74                                "common_flags");
  75         if (ret < 0)
  76                 return -1;
  77
  78         return ret;
  79 }
  80
  81 int common_pc(struct scripting_context *context)
  82 {
  83         static int offset;
  84         static int size;
  85         int ret;
  86
  87         ret = get_common_field(context, &size, &offset,
  88                                "common_preempt_count");
  89         if (ret < 0)
  90                 return -1;
  91
  92         return ret;
  93 }
  94
  95 unsigned long long
  96 raw_field_value(struct event_format *event, const char *name, void *data)
  97 {
  98         struct format_field *field;
  99         unsigned long long val;
 100
 101         field = pevent_find_any_field(event, name);
 102         if (!field)
 103                 return 0ULL;
 104
 105         pevent_read_number_field(field, data, &val);
 106
 107         return val;
 108 }
 109
 110 unsigned long long read_size(struct event_format *event, void *ptr, int size)
 111 {
 112         return pevent_read_number(event->pevent, ptr, size);
 113 }
 114
 115 void event_format__print(struct event_format *event,
 116                          int cpu, void *data, int size)
 117 {
 118         struct pevent_record record;
 119         struct trace_seq s;
 120
 121         memset(&record, 0, sizeof(record));
 122         record.cpu = cpu;
 123         record.size = size;
 124         record.data = data;
 125
 126         trace_seq_init(&s);
 127         pevent_event_info(&s, event, &record);
 128         trace_seq_do_printf(&s);
 129 }
 130
 131 void parse_proc_kallsyms(struct pevent *pevent,
 132                          char *file, unsigned int size __maybe_unused)
 133 {
 134         unsigned long long addr;
 135         char *func;
 136         char *line;
 137         char *next = NULL;
 138         char *addr_str;
 139         char *mod;
 140         char *fmt = NULL;
 141
 142         line = strtok_r(file, "\n", &next);
 143         while (line) {
 144                 mod = NULL;
 145                 addr_str = strtok_r(line, " ", &fmt);
 146                 addr = strtoull(addr_str, NULL, 16);
 147                 /* skip character */
 148                 strtok_r(NULL, " ", &fmt);
 149                 func = strtok_r(NULL, "\t", &fmt);
 150                 mod = strtok_r(NULL, "]", &fmt);
 151                 /* truncate the extra '[' */
 152                 if (mod)
 153                         mod = mod + 1;
 154
 155                 pevent_register_function(pevent, func, addr, mod);
 156
 157                 line = strtok_r(NULL, "\n", &next);
 158         }
 159 }
 160
 161 void parse_ftrace_printk(struct pevent *pevent,
 162                          char *file, unsigned int size __maybe_unused)
 163 {
 164         unsigned long long addr;
 165         char *printk;
 166         char *line;
 167         char *next = NULL;
 168         char *addr_str;
 169         char *fmt;
 170
 171         line = strtok_r(file, "\n", &next);
 172         while (line) {
 173                 addr_str = strtok_r(line, ":", &fmt);
 174                 if (!addr_str) {
 175                         warning("printk format with empty entry");
 176                         break;
 177                 }
 178                 addr = strtoull(addr_str, NULL, 16);
 179                 /* fmt still has a space, skip it */
 180                 printk = strdup(fmt+1);
 181                 line = strtok_r(NULL, "\n", &next);
 182                 pevent_register_print_string(pevent, printk, addr);
 183         }
 184 }
 185
 186 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
 187 {
 188         return pevent_parse_event(pevent, buf, size, "ftrace");
 189 }
 190
 191 int parse_event_file(struct pevent *pevent,
 192                      char *buf, unsigned long size, char *sys)
 193 {
 194         return pevent_parse_event(pevent, buf, size, sys);
 195 }
 196
 197 struct event_format *trace_find_next_event(struct pevent *pevent,
 198                                            struct event_format *event)
 199 {
 200         static int idx;
 201
 202         if (!pevent || !pevent->events)
 203                 return NULL;
 204
 205         if (!event) {
 206                 idx = 0;
 207                 return pevent->events[0];
 208         }
 209
 210         if (idx < pevent->nr_events && event == pevent->events[idx]) {
 211                 idx++;
 212                 if (idx == pevent->nr_events)
 213                         return NULL;
 214                 return pevent->events[idx];
 215         }
 216
 217         for (idx = 1; idx < pevent->nr_events; idx++) {
 218                 if (event == pevent->events[idx - 1])
 219                         return pevent->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         { "BLOCK_IOPOLL_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 }