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
15static int get_common_field(struct scripting_context *context,
16			    int *offset, int *size, const char *type)
17{
18	struct tep_handle *pevent = context->pevent;
19	struct tep_event *event;
20	struct tep_format_field *field;
21
22	if (!*size) {
23
24		event = tep_get_first_event(pevent);
25		if (!event)
26			return 0;
27
28		field = tep_find_common_field(event, type);
29		if (!field)
30			return 0;
31		*offset = field->offset;
32		*size = field->size;
33	}
34
35	return tep_read_number(pevent, context->event_data + *offset, *size);
36}
37
38int common_lock_depth(struct scripting_context *context)
39{
40	static int offset;
41	static int size;
42	int ret;
43
44	ret = get_common_field(context, &size, &offset,
45			       "common_lock_depth");
46	if (ret < 0)
47		return -1;
48
49	return ret;
50}
51
52int common_flags(struct scripting_context *context)
53{
54	static int offset;
55	static int size;
56	int ret;
57
58	ret = get_common_field(context, &size, &offset,
59			       "common_flags");
60	if (ret < 0)
61		return -1;
62
63	return ret;
64}
65
66int common_pc(struct scripting_context *context)
67{
68	static int offset;
69	static int size;
70	int ret;
71
72	ret = get_common_field(context, &size, &offset,
73			       "common_preempt_count");
74	if (ret < 0)
75		return -1;
76
77	return ret;
78}
79
80unsigned long long
81raw_field_value(struct tep_event *event, const char *name, void *data)
82{
83	struct tep_format_field *field;
84	unsigned long long val;
85
86	field = tep_find_any_field(event, name);
87	if (!field)
88		return 0ULL;
89
90	tep_read_number_field(field, data, &val);
91
92	return val;
93}
94
95unsigned long long read_size(struct tep_event *event, void *ptr, int size)
96{
97	return tep_read_number(event->tep, ptr, size);
98}
99
100void event_format__fprintf(struct tep_event *event,
101			   int cpu, void *data, int size, FILE *fp)
102{
103	struct tep_record record;
104	struct trace_seq s;
105
106	memset(&record, 0, sizeof(record));
107	record.cpu = cpu;
108	record.size = size;
109	record.data = data;
110
111	trace_seq_init(&s);
112	tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
113	trace_seq_do_fprintf(&s, fp);
114	trace_seq_destroy(&s);
115}
116
117void event_format__print(struct tep_event *event,
118			 int cpu, void *data, int size)
119{
120	return event_format__fprintf(event, cpu, data, size, stdout);
121}
122
123void parse_ftrace_printk(struct tep_handle *pevent,
124			 char *file, unsigned int size __maybe_unused)
125{
126	unsigned long long addr;
127	char *printk;
128	char *line;
129	char *next = NULL;
130	char *addr_str;
131	char *fmt = NULL;
132
133	line = strtok_r(file, "\n", &next);
134	while (line) {
135		addr_str = strtok_r(line, ":", &fmt);
136		if (!addr_str) {
137			pr_warning("printk format with empty entry");
138			break;
139		}
140		addr = strtoull(addr_str, NULL, 16);
141		/* fmt still has a space, skip it */
142		printk = strdup(fmt+1);
143		line = strtok_r(NULL, "\n", &next);
144		tep_register_print_string(pevent, printk, addr);
145		free(printk);
146	}
147}
148
149void parse_saved_cmdline(struct tep_handle *pevent,
150			 char *file, unsigned int size __maybe_unused)
151{
152	char comm[17]; /* Max comm length in the kernel is 16. */
153	char *line;
154	char *next = NULL;
155	int pid;
156
157	line = strtok_r(file, "\n", &next);
158	while (line) {
159		if (sscanf(line, "%d %16s", &pid, comm) == 2)
160			tep_register_comm(pevent, comm, pid);
161		line = strtok_r(NULL, "\n", &next);
162	}
163}
164
165int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
166{
167	return tep_parse_event(pevent, buf, size, "ftrace");
168}
169
170int parse_event_file(struct tep_handle *pevent,
171		     char *buf, unsigned long size, char *sys)
172{
173	return tep_parse_event(pevent, buf, size, sys);
174}
175
176struct flag {
177	const char *name;
178	unsigned long long value;
179};
180
181static const struct flag flags[] = {
182	{ "HI_SOFTIRQ", 0 },
183	{ "TIMER_SOFTIRQ", 1 },
184	{ "NET_TX_SOFTIRQ", 2 },
185	{ "NET_RX_SOFTIRQ", 3 },
186	{ "BLOCK_SOFTIRQ", 4 },
187	{ "IRQ_POLL_SOFTIRQ", 5 },
188	{ "TASKLET_SOFTIRQ", 6 },
189	{ "SCHED_SOFTIRQ", 7 },
190	{ "HRTIMER_SOFTIRQ", 8 },
191	{ "RCU_SOFTIRQ", 9 },
192
193	{ "HRTIMER_NORESTART", 0 },
194	{ "HRTIMER_RESTART", 1 },
195};
196
197unsigned long long eval_flag(const char *flag)
198{
199	int i;
200
201	/*
202	 * Some flags in the format files do not get converted.
203	 * If the flag is not numeric, see if it is something that
204	 * we already know about.
205	 */
206	if (isdigit(flag[0]))
207		return strtoull(flag, NULL, 0);
208
209	for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
210		if (strcmp(flags[i].name, flag) == 0)
211			return flags[i].value;
212
213	return 0;
214}
215