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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
   4  */
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <errno.h>
   9
  10 #include "debug.h"
  11 #include "trace-event.h"
  12
  13 #include <linux/ctype.h>
  14
  15 static int get_common_field(struct scripting_context *context,
  16                             int *offset, int *size, const char *type)
  17 {
  18         struct tep_handle *pevent = context->pevent;
  19         struct tep_event *event;
  20         struct tep_format_field *field;
  21
  22         if (!*size) {
  23
  24                 event = tep_get_first_event(pevent);
  25                 if (!event)
  26                         return 0;
  27
  28                 field = tep_find_common_field(event, type);
  29                 if (!field)
  30                         return 0;
  31                 *offset = field->offset;
  32                 *size = field->size;
  33         }
  34
  35         return tep_read_number(pevent, context->event_data + *offset, *size);
  36 }
  37
  38 int common_lock_depth(struct scripting_context *context)
  39 {
  40         static int offset;
  41         static int size;
  42         int ret;
  43
  44         ret = get_common_field(context, &size, &offset,
  45                                "common_lock_depth");
  46         if (ret < 0)
  47                 return -1;
  48
  49         return ret;
  50 }
  51
  52 int common_flags(struct scripting_context *context)
  53 {
  54         static int offset;
  55         static int size;
  56         int ret;
  57
  58         ret = get_common_field(context, &size, &offset,
  59                                "common_flags");
  60         if (ret < 0)
  61                 return -1;
  62
  63         return ret;
  64 }
  65
  66 int common_pc(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_preempt_count");
  74         if (ret < 0)
  75                 return -1;
  76
  77         return ret;
  78 }
  79
  80 unsigned long long
  81 raw_field_value(struct tep_event *event, const char *name, void *data)
  82 {
  83         struct tep_format_field *field;
  84         unsigned long long val;
  85
  86         field = tep_find_any_field(event, name);
  87         if (!field)
  88                 return 0ULL;
  89
  90         tep_read_number_field(field, data, &val);
  91
  92         return val;
  93 }
  94
  95 unsigned long long read_size(struct tep_event *event, void *ptr, int size)
  96 {
  97         return tep_read_number(event->tep, ptr, size);
  98 }
  99
 100 void event_format__fprintf(struct tep_event *event,
 101                            int cpu, void *data, int size, FILE *fp)
 102 {
 103         struct tep_record record;
 104         struct trace_seq s;
 105
 106         memset(&record, 0, sizeof(record));
 107         record.cpu = cpu;
 108         record.size = size;
 109         record.data = data;
 110
 111         trace_seq_init(&s);
 112         tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
 113         trace_seq_do_fprintf(&s, fp);
 114         trace_seq_destroy(&s);
 115 }
 116
 117 void event_format__print(struct tep_event *event,
 118                          int cpu, void *data, int size)
 119 {
 120         return event_format__fprintf(event, cpu, data, size, stdout);
 121 }
 122
 123 void parse_ftrace_printk(struct tep_handle *pevent,
 124                          char *file, unsigned int size __maybe_unused)
 125 {
 126         unsigned long long addr;
 127         char *printk;
 128         char *line;
 129         char *next = NULL;
 130         char *addr_str;
 131         char *fmt = NULL;
 132
 133         line = strtok_r(file, "\n", &next);
 134         while (line) {
 135                 addr_str = strtok_r(line, ":", &fmt);
 136                 if (!addr_str) {
 137                         pr_warning("printk format with empty entry");
 138                         break;
 139                 }
 140                 addr = strtoull(addr_str, NULL, 16);
 141                 /* fmt still has a space, skip it */
 142                 printk = strdup(fmt+1);
 143                 line = strtok_r(NULL, "\n", &next);
 144                 tep_register_print_string(pevent, printk, addr);
 145                 free(printk);
 146         }
 147 }
 148
 149 void parse_saved_cmdline(struct tep_handle *pevent,
 150                          char *file, unsigned int size __maybe_unused)
 151 {
 152         char comm[17]; /* Max comm length in the kernel is 16. */
 153         char *line;
 154         char *next = NULL;
 155         int pid;
 156
 157         line = strtok_r(file, "\n", &next);
 158         while (line) {
 159                 if (sscanf(line, "%d %16s", &pid, comm) == 2)
 160                         tep_register_comm(pevent, comm, pid);
 161                 line = strtok_r(NULL, "\n", &next);
 162         }
 163 }
 164
 165 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
 166 {
 167         return tep_parse_event(pevent, buf, size, "ftrace");
 168 }
 169
 170 int parse_event_file(struct tep_handle *pevent,
 171                      char *buf, unsigned long size, char *sys)
 172 {
 173         return tep_parse_event(pevent, buf, size, sys);
 174 }
 175
 176 struct flag {
 177         const char *name;
 178         unsigned long long value;
 179 };
 180
 181 static const struct flag flags[] = {
 182         { "HI_SOFTIRQ", 0 },
 183         { "TIMER_SOFTIRQ", 1 },
 184         { "NET_TX_SOFTIRQ", 2 },
 185         { "NET_RX_SOFTIRQ", 3 },
 186         { "BLOCK_SOFTIRQ", 4 },
 187         { "IRQ_POLL_SOFTIRQ", 5 },
 188         { "TASKLET_SOFTIRQ", 6 },
 189         { "SCHED_SOFTIRQ", 7 },
 190         { "HRTIMER_SOFTIRQ", 8 },
 191         { "RCU_SOFTIRQ", 9 },
 192
 193         { "HRTIMER_NORESTART", 0 },
 194         { "HRTIMER_RESTART", 1 },
 195 };
 196
 197 unsigned long long eval_flag(const char *flag)
 198 {
 199         int i;
 200
 201         /*
 202          * Some flags in the format files do not get converted.
 203          * If the flag is not numeric, see if it is something that
 204          * we already know about.
 205          */
 206         if (isdigit(flag[0]))
 207                 return strtoull(flag, NULL, 0);
 208
 209         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
 210                 if (strcmp(flags[i].name, flag) == 0)
 211                         return flags[i].value;
 212
 213         return 0;
 214 }