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 "../perf.h" 11 #include "debug.h" 12 #include "trace-event.h" 13 14 #include <linux/ctype.h> 15 16 static int get_common_field(struct scripting_context *context, 17 int *offset, int *size, const char *type) 18 { 19 struct tep_handle *pevent = context->pevent; 20 struct tep_event *event; 21 struct tep_format_field *field; 22 23 if (!*size) { 24 25 event = tep_get_first_event(pevent); 26 if (!event) 27 return 0; 28 29 field = tep_find_common_field(event, type); 30 if (!field) 31 return 0; 32 *offset = field->offset; 33 *size = field->size; 34 } 35 36 return tep_read_number(pevent, context->event_data + *offset, *size); 37 } 38 39 int common_lock_depth(struct scripting_context *context) 40 { 41 static int offset; 42 static int size; 43 int ret; 44 45 ret = get_common_field(context, &size, &offset, 46 "common_lock_depth"); 47 if (ret < 0) 48 return -1; 49 50 return ret; 51 } 52 53 int common_flags(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_flags"); 61 if (ret < 0) 62 return -1; 63 64 return ret; 65 } 66 67 int common_pc(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_preempt_count"); 75 if (ret < 0) 76 return -1; 77 78 return ret; 79 } 80 81 unsigned long long 82 raw_field_value(struct tep_event *event, const char *name, void *data) 83 { 84 struct tep_format_field *field; 85 unsigned long long val; 86 87 field = tep_find_any_field(event, name); 88 if (!field) 89 return 0ULL; 90 91 tep_read_number_field(field, data, &val); 92 93 return val; 94 } 95 96 unsigned long long read_size(struct tep_event *event, void *ptr, int size) 97 { 98 return tep_read_number(event->tep, ptr, size); 99 } 100 101 void event_format__fprintf(struct tep_event *event, 102 int cpu, void *data, int size, FILE *fp) 103 { 104 struct tep_record record; 105 struct trace_seq s; 106 107 memset(&record, 0, sizeof(record)); 108 record.cpu = cpu; 109 record.size = size; 110 record.data = data; 111 112 trace_seq_init(&s); 113 tep_event_info(&s, event, &record); 114 trace_seq_do_fprintf(&s, fp); 115 trace_seq_destroy(&s); 116 } 117 118 void event_format__print(struct tep_event *event, 119 int cpu, void *data, int size) 120 { 121 return event_format__fprintf(event, cpu, data, size, stdout); 122 } 123 124 void parse_ftrace_printk(struct tep_handle *pevent, 125 char *file, unsigned int size __maybe_unused) 126 { 127 unsigned long long addr; 128 char *printk; 129 char *line; 130 char *next = NULL; 131 char *addr_str; 132 char *fmt = NULL; 133 134 line = strtok_r(file, "\n", &next); 135 while (line) { 136 addr_str = strtok_r(line, ":", &fmt); 137 if (!addr_str) { 138 pr_warning("printk format with empty entry"); 139 break; 140 } 141 addr = strtoull(addr_str, NULL, 16); 142 /* fmt still has a space, skip it */ 143 printk = strdup(fmt+1); 144 line = strtok_r(NULL, "\n", &next); 145 tep_register_print_string(pevent, printk, addr); 146 free(printk); 147 } 148 } 149 150 void parse_saved_cmdline(struct tep_handle *pevent, 151 char *file, unsigned int size __maybe_unused) 152 { 153 char comm[17]; /* Max comm length in the kernel is 16. */ 154 char *line; 155 char *next = NULL; 156 int pid; 157 158 line = strtok_r(file, "\n", &next); 159 while (line) { 160 if (sscanf(line, "%d %16s", &pid, comm) == 2) 161 tep_register_comm(pevent, comm, pid); 162 line = strtok_r(NULL, "\n", &next); 163 } 164 } 165 166 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size) 167 { 168 return tep_parse_event(pevent, buf, size, "ftrace"); 169 } 170 171 int parse_event_file(struct tep_handle *pevent, 172 char *buf, unsigned long size, char *sys) 173 { 174 return tep_parse_event(pevent, buf, size, sys); 175 } 176 177 struct tep_event *trace_find_next_event(struct tep_handle *pevent, 178 struct tep_event *event) 179 { 180 static int idx; 181 int events_count; 182 struct tep_event *all_events; 183 184 all_events = tep_get_first_event(pevent); 185 events_count = tep_get_events_count(pevent); 186 if (!pevent || !all_events || events_count < 1) 187 return NULL; 188 189 if (!event) { 190 idx = 0; 191 return all_events; 192 } 193 194 if (idx < events_count && event == (all_events + idx)) { 195 idx++; 196 if (idx == events_count) 197 return NULL; 198 return (all_events + idx); 199 } 200 201 for (idx = 1; idx < events_count; idx++) { 202 if (event == (all_events + (idx - 1))) 203 return (all_events + idx); 204 } 205 return NULL; 206 } 207 208 struct flag { 209 const char *name; 210 unsigned long long value; 211 }; 212 213 static const struct flag flags[] = { 214 { "HI_SOFTIRQ", 0 }, 215 { "TIMER_SOFTIRQ", 1 }, 216 { "NET_TX_SOFTIRQ", 2 }, 217 { "NET_RX_SOFTIRQ", 3 }, 218 { "BLOCK_SOFTIRQ", 4 }, 219 { "IRQ_POLL_SOFTIRQ", 5 }, 220 { "TASKLET_SOFTIRQ", 6 }, 221 { "SCHED_SOFTIRQ", 7 }, 222 { "HRTIMER_SOFTIRQ", 8 }, 223 { "RCU_SOFTIRQ", 9 }, 224 225 { "HRTIMER_NORESTART", 0 }, 226 { "HRTIMER_RESTART", 1 }, 227 }; 228 229 unsigned long long eval_flag(const char *flag) 230 { 231 int i; 232 233 /* 234 * Some flags in the format files do not get converted. 235 * If the flag is not numeric, see if it is something that 236 * we already know about. 237 */ 238 if (isdigit(flag[0])) 239 return strtoull(flag, NULL, 0); 240 241 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++) 242 if (strcmp(flags[i].name, flag) == 0) 243 return flags[i].value; 244 245 return 0; 246 } 247