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 tep_handle *pevent = context->pevent; 36 struct tep_event *event; 37 struct tep_format_field *field; 38 39 if (!*size) { 40 41 event = tep_get_first_event(pevent); 42 if (!event) 43 return 0; 44 45 field = tep_find_common_field(event, type); 46 if (!field) 47 return 0; 48 *offset = field->offset; 49 *size = field->size; 50 } 51 52 return tep_read_number(pevent, context->event_data + *offset, *size); 53 } 54 55 int common_lock_depth(struct scripting_context *context) 56 { 57 static int offset; 58 static int size; 59 int ret; 60 61 ret = get_common_field(context, &size, &offset, 62 "common_lock_depth"); 63 if (ret < 0) 64 return -1; 65 66 return ret; 67 } 68 69 int common_flags(struct scripting_context *context) 70 { 71 static int offset; 72 static int size; 73 int ret; 74 75 ret = get_common_field(context, &size, &offset, 76 "common_flags"); 77 if (ret < 0) 78 return -1; 79 80 return ret; 81 } 82 83 int common_pc(struct scripting_context *context) 84 { 85 static int offset; 86 static int size; 87 int ret; 88 89 ret = get_common_field(context, &size, &offset, 90 "common_preempt_count"); 91 if (ret < 0) 92 return -1; 93 94 return ret; 95 } 96 97 unsigned long long 98 raw_field_value(struct tep_event *event, const char *name, void *data) 99 { 100 struct tep_format_field *field; 101 unsigned long long val; 102 103 field = tep_find_any_field(event, name); 104 if (!field) 105 return 0ULL; 106 107 tep_read_number_field(field, data, &val); 108 109 return val; 110 } 111 112 unsigned long long read_size(struct tep_event *event, void *ptr, int size) 113 { 114 return tep_read_number(event->pevent, ptr, size); 115 } 116 117 void event_format__fprintf(struct tep_event *event, 118 int cpu, void *data, int size, FILE *fp) 119 { 120 struct tep_record record; 121 struct trace_seq s; 122 123 memset(&record, 0, sizeof(record)); 124 record.cpu = cpu; 125 record.size = size; 126 record.data = data; 127 128 trace_seq_init(&s); 129 tep_event_info(&s, event, &record); 130 trace_seq_do_fprintf(&s, fp); 131 trace_seq_destroy(&s); 132 } 133 134 void event_format__print(struct tep_event *event, 135 int cpu, void *data, int size) 136 { 137 return event_format__fprintf(event, cpu, data, size, stdout); 138 } 139 140 void parse_ftrace_printk(struct tep_handle *pevent, 141 char *file, unsigned int size __maybe_unused) 142 { 143 unsigned long long addr; 144 char *printk; 145 char *line; 146 char *next = NULL; 147 char *addr_str; 148 char *fmt = NULL; 149 150 line = strtok_r(file, "\n", &next); 151 while (line) { 152 addr_str = strtok_r(line, ":", &fmt); 153 if (!addr_str) { 154 pr_warning("printk format with empty entry"); 155 break; 156 } 157 addr = strtoull(addr_str, NULL, 16); 158 /* fmt still has a space, skip it */ 159 printk = strdup(fmt+1); 160 line = strtok_r(NULL, "\n", &next); 161 tep_register_print_string(pevent, printk, addr); 162 free(printk); 163 } 164 } 165 166 void parse_saved_cmdline(struct tep_handle *pevent, 167 char *file, unsigned int size __maybe_unused) 168 { 169 char comm[17]; /* Max comm length in the kernel is 16. */ 170 char *line; 171 char *next = NULL; 172 int pid; 173 174 line = strtok_r(file, "\n", &next); 175 while (line) { 176 if (sscanf(line, "%d %16s", &pid, comm) == 2) 177 tep_register_comm(pevent, comm, pid); 178 line = strtok_r(NULL, "\n", &next); 179 } 180 } 181 182 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size) 183 { 184 return tep_parse_event(pevent, buf, size, "ftrace"); 185 } 186 187 int parse_event_file(struct tep_handle *pevent, 188 char *buf, unsigned long size, char *sys) 189 { 190 return tep_parse_event(pevent, buf, size, sys); 191 } 192 193 struct tep_event *trace_find_next_event(struct tep_handle *pevent, 194 struct tep_event *event) 195 { 196 static int idx; 197 int events_count; 198 struct tep_event *all_events; 199 200 all_events = tep_get_first_event(pevent); 201 events_count = tep_get_events_count(pevent); 202 if (!pevent || !all_events || events_count < 1) 203 return NULL; 204 205 if (!event) { 206 idx = 0; 207 return all_events; 208 } 209 210 if (idx < events_count && event == (all_events + idx)) { 211 idx++; 212 if (idx == events_count) 213 return NULL; 214 return (all_events + idx); 215 } 216 217 for (idx = 1; idx < events_count; idx++) { 218 if (event == (all_events + (idx - 1))) 219 return (all_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 { "IRQ_POLL_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