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TOMOYO Linux Cross Reference
Linux/tools/perf/util/trace-event-parse.c

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  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 }
258 

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