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
get_common_field(struct scripting_context * context,int * offset,int * size,const char * type)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
common_lock_depth(struct scripting_context * context)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
common_flags(struct scripting_context * context)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
common_pc(struct scripting_context * context)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
raw_field_value(struct tep_event * event,const char * name,void * data)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
read_size(struct tep_event * event,void * ptr,int size)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
event_format__fprintf(struct tep_event * event,int cpu,void * data,int size,FILE * fp)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
event_format__print(struct tep_event * event,int cpu,void * data,int size)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
parse_ftrace_printk(struct tep_handle * pevent,char * file,unsigned int size __maybe_unused)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
parse_saved_cmdline(struct tep_handle * pevent,char * file,unsigned int size __maybe_unused)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
parse_ftrace_file(struct tep_handle * pevent,char * buf,unsigned long size)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
parse_event_file(struct tep_handle * pevent,char * buf,unsigned long size,char * sys)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
eval_flag(const char * flag)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