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 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 = tep_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 = tep_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 tep_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 tep_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 tep_handle *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 tep_handle *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 tep_handle *pevent, char *buf, unsigned long size) 182 { 183 return tep_parse_event(pevent, buf, size, "ftrace"); 184 } 185 186 int parse_event_file(struct tep_handle *pevent, 187 char *buf, unsigned long size, char *sys) 188 { 189 return tep_parse_event(pevent, buf, size, sys); 190 } 191 192 struct event_format *trace_find_next_event(struct tep_handle *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