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}
217