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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
17static 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
40int 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
54int 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
68int 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
82unsigned long long
83raw_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
97unsigned long long read_size(struct tep_event *event, void *ptr, int size)
98{
99 return tep_read_number(event->tep, ptr, size);
100}
101
102void 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
119void 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
125void 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
151void 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
167int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
168{
169 return tep_parse_event(pevent, buf, size, "ftrace");
170}
171
172int 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
178struct flag {
179 const char *name;
180 unsigned long long value;
181};
182
183static 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
199unsigned 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}
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
31static 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
53int 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
67int 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
81int 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
95unsigned long long
96raw_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
110unsigned long long read_size(struct event_format *event, void *ptr, int size)
111{
112 return pevent_read_number(event->pevent, ptr, size);
113}
114
115void 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 trace_seq_destroy(&s);
130}
131
132void parse_proc_kallsyms(struct pevent *pevent,
133 char *file, unsigned int size __maybe_unused)
134{
135 unsigned long long addr;
136 char *func;
137 char *line;
138 char *next = NULL;
139 char *addr_str;
140 char *mod;
141 char *fmt = NULL;
142
143 line = strtok_r(file, "\n", &next);
144 while (line) {
145 mod = NULL;
146 addr_str = strtok_r(line, " ", &fmt);
147 addr = strtoull(addr_str, NULL, 16);
148 /* skip character */
149 strtok_r(NULL, " ", &fmt);
150 func = strtok_r(NULL, "\t", &fmt);
151 mod = strtok_r(NULL, "]", &fmt);
152 /* truncate the extra '[' */
153 if (mod)
154 mod = mod + 1;
155
156 pevent_register_function(pevent, func, addr, mod);
157
158 line = strtok_r(NULL, "\n", &next);
159 }
160}
161
162void parse_ftrace_printk(struct pevent *pevent,
163 char *file, unsigned int size __maybe_unused)
164{
165 unsigned long long addr;
166 char *printk;
167 char *line;
168 char *next = NULL;
169 char *addr_str;
170 char *fmt;
171
172 line = strtok_r(file, "\n", &next);
173 while (line) {
174 addr_str = strtok_r(line, ":", &fmt);
175 if (!addr_str) {
176 warning("printk format with empty entry");
177 break;
178 }
179 addr = strtoull(addr_str, NULL, 16);
180 /* fmt still has a space, skip it */
181 printk = strdup(fmt+1);
182 line = strtok_r(NULL, "\n", &next);
183 pevent_register_print_string(pevent, printk, addr);
184 }
185}
186
187int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
188{
189 return pevent_parse_event(pevent, buf, size, "ftrace");
190}
191
192int parse_event_file(struct pevent *pevent,
193 char *buf, unsigned long size, char *sys)
194{
195 return pevent_parse_event(pevent, buf, size, sys);
196}
197
198struct event_format *trace_find_next_event(struct pevent *pevent,
199 struct event_format *event)
200{
201 static int idx;
202
203 if (!pevent || !pevent->events)
204 return NULL;
205
206 if (!event) {
207 idx = 0;
208 return pevent->events[0];
209 }
210
211 if (idx < pevent->nr_events && event == pevent->events[idx]) {
212 idx++;
213 if (idx == pevent->nr_events)
214 return NULL;
215 return pevent->events[idx];
216 }
217
218 for (idx = 1; idx < pevent->nr_events; idx++) {
219 if (event == pevent->events[idx - 1])
220 return pevent->events[idx];
221 }
222 return NULL;
223}
224
225struct flag {
226 const char *name;
227 unsigned long long value;
228};
229
230static const struct flag flags[] = {
231 { "HI_SOFTIRQ", 0 },
232 { "TIMER_SOFTIRQ", 1 },
233 { "NET_TX_SOFTIRQ", 2 },
234 { "NET_RX_SOFTIRQ", 3 },
235 { "BLOCK_SOFTIRQ", 4 },
236 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
237 { "TASKLET_SOFTIRQ", 6 },
238 { "SCHED_SOFTIRQ", 7 },
239 { "HRTIMER_SOFTIRQ", 8 },
240 { "RCU_SOFTIRQ", 9 },
241
242 { "HRTIMER_NORESTART", 0 },
243 { "HRTIMER_RESTART", 1 },
244};
245
246unsigned long long eval_flag(const char *flag)
247{
248 int i;
249
250 /*
251 * Some flags in the format files do not get converted.
252 * If the flag is not numeric, see if it is something that
253 * we already know about.
254 */
255 if (isdigit(flag[0]))
256 return strtoull(flag, NULL, 0);
257
258 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
259 if (strcmp(flags[i].name, flag) == 0)
260 return flags[i].value;
261
262 return 0;
263}