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 } 263