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 "debug.h" 11 #include "trace-event.h" 12 13 #include <linux/ctype.h> 14 #include <linux/kernel.h> 15 #include <traceevent/event-parse.h> 16 17 static int get_common_field(struct scripting_context *context, 18 int *offset, int *size, const char *type) 19 { 20 struct tep_handle *pevent = context->pevent; 21 struct tep_event *event; 22 struct tep_format_field *field; 23 24 if (!*size) { 25 26 event = tep_get_first_event(pevent); 27 if (!event) 28 return 0; 29 30 field = tep_find_common_field(event, type); 31 if (!field) 32 return 0; 33 *offset = field->offset; 34 *size = field->size; 35 } 36 37 return tep_read_number(pevent, context->event_data + *offset, *size); 38 } 39 40 int common_lock_depth(struct scripting_context *context) 41 { 42 static int offset; 43 static int size; 44 int ret; 45 46 ret = get_common_field(context, &size, &offset, 47 "common_lock_depth"); 48 if (ret < 0) 49 return -1; 50 51 return ret; 52 } 53 54 int common_flags(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_flags"); 62 if (ret < 0) 63 return -1; 64 65 return ret; 66 } 67 68 int common_pc(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_preempt_count"); 76 if (ret < 0) 77 return -1; 78 79 return ret; 80 } 81 82 unsigned long long 83 raw_field_value(struct tep_event *event, const char *name, void *data) 84 { 85 struct tep_format_field *field; 86 unsigned long long val; 87 88 field = tep_find_any_field(event, name); 89 if (!field) 90 return 0ULL; 91 92 tep_read_number_field(field, data, &val); 93 94 return val; 95 } 96 97 unsigned long long read_size(struct tep_event *event, void *ptr, int size) 98 { 99 return tep_read_number(event->tep, ptr, size); 100 } 101 102 void event_format__fprintf(struct tep_event *event, 103 int cpu, void *data, int size, FILE *fp) 104 { 105 struct tep_record record; 106 struct trace_seq s; 107 108 memset(&record, 0, sizeof(record)); 109 record.cpu = cpu; 110 record.size = size; 111 record.data = data; 112 113 trace_seq_init(&s); 114 tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO); 115 trace_seq_do_fprintf(&s, fp); 116 trace_seq_destroy(&s); 117 } 118 119 void event_format__print(struct tep_event *event, 120 int cpu, void *data, int size) 121 { 122 return event_format__fprintf(event, cpu, data, size, stdout); 123 } 124 125 void parse_ftrace_printk(struct tep_handle *pevent, 126 char *file, unsigned int size __maybe_unused) 127 { 128 unsigned long long addr; 129 char *printk; 130 char *line; 131 char *next = NULL; 132 char *addr_str; 133 char *fmt = NULL; 134 135 line = strtok_r(file, "\n", &next); 136 while (line) { 137 addr_str = strtok_r(line, ":", &fmt); 138 if (!addr_str) { 139 pr_warning("printk format with empty entry"); 140 break; 141 } 142 addr = strtoull(addr_str, NULL, 16); 143 /* fmt still has a space, skip it */ 144 printk = strdup(fmt+1); 145 line = strtok_r(NULL, "\n", &next); 146 tep_register_print_string(pevent, printk, addr); 147 free(printk); 148 } 149 } 150 151 void parse_saved_cmdline(struct tep_handle *pevent, 152 char *file, unsigned int size __maybe_unused) 153 { 154 char comm[17]; /* Max comm length in the kernel is 16. */ 155 char *line; 156 char *next = NULL; 157 int pid; 158 159 line = strtok_r(file, "\n", &next); 160 while (line) { 161 if (sscanf(line, "%d %16s", &pid, comm) == 2) 162 tep_register_comm(pevent, comm, pid); 163 line = strtok_r(NULL, "\n", &next); 164 } 165 } 166 167 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size) 168 { 169 return tep_parse_event(pevent, buf, size, "ftrace"); 170 } 171 172 int parse_event_file(struct tep_handle *pevent, 173 char *buf, unsigned long size, char *sys) 174 { 175 return tep_parse_event(pevent, buf, size, sys); 176 } 177 178 struct flag { 179 const char *name; 180 unsigned long long value; 181 }; 182 183 static const struct flag flags[] = { 184 { "HI_SOFTIRQ", 0 }, 185 { "TIMER_SOFTIRQ", 1 }, 186 { "NET_TX_SOFTIRQ", 2 }, 187 { "NET_RX_SOFTIRQ", 3 }, 188 { "BLOCK_SOFTIRQ", 4 }, 189 { "IRQ_POLL_SOFTIRQ", 5 }, 190 { "TASKLET_SOFTIRQ", 6 }, 191 { "SCHED_SOFTIRQ", 7 }, 192 { "HRTIMER_SOFTIRQ", 8 }, 193 { "RCU_SOFTIRQ", 9 }, 194 195 { "HRTIMER_NORESTART", 0 }, 196 { "HRTIMER_RESTART", 1 }, 197 }; 198 199 unsigned long long eval_flag(const char *flag) 200 { 201 int i; 202 203 /* 204 * Some flags in the format files do not get converted. 205 * If the flag is not numeric, see if it is something that 206 * we already know about. 207 */ 208 if (isdigit(flag[0])) 209 return strtoull(flag, NULL, 0); 210 211 for (i = 0; i < (int)(ARRAY_SIZE(flags)); i++) 212 if (strcmp(flags[i].name, flag) == 0) 213 return flags[i].value; 214 215 return 0; 216 } 217