xref: /linux/tools/perf/util/trace-event.h (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PERF_UTIL_TRACE_EVENT_H
3 #define _PERF_UTIL_TRACE_EVENT_H
4 
5 #include <stdbool.h>
6 #include <stdio.h>
7 #include <sys/types.h>
8 #include <linux/types.h>
9 
10 struct evlist;
11 struct machine;
12 struct perf_sample;
13 union perf_event;
14 struct perf_tool;
15 struct thread;
16 struct tep_plugin_list;
17 struct evsel;
18 struct tep_format_field;
19 
20 struct trace_event {
21 	struct tep_handle	*pevent;
22 	struct tep_plugin_list	*plugin_list;
23 };
24 
25 /* Computes a version number comparable with LIBTRACEEVENT_VERSION from Makefile.config. */
26 #define MAKE_LIBTRACEEVENT_VERSION(a, b, c) ((a)*255*255+(b)*255+(c))
27 
28 typedef char *(tep_func_resolver_t)(void *priv,
29 				    unsigned long long *addrp, char **modp);
30 
31 bool have_tracepoints(struct list_head *evlist);
32 
33 int trace_event__init(struct trace_event *t);
34 void trace_event__cleanup(struct trace_event *t);
35 int trace_event__register_resolver(struct machine *machine,
36 				   tep_func_resolver_t *func);
37 struct tep_event*
38 trace_event__tp_format(const char *sys, const char *name);
39 
40 struct tep_event *trace_event__tp_format_id(int id);
41 
42 void event_format__fprintf(struct tep_event *event,
43 			   int cpu, void *data, int size, FILE *fp);
44 
45 void event_format__print(struct tep_event *event,
46 			 int cpu, void *data, int size);
47 
48 int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size);
49 int parse_event_file(struct tep_handle *pevent,
50 		     char *buf, unsigned long size, char *sys);
51 
52 unsigned long long
53 raw_field_value(struct tep_event *event, const char *name, void *data);
54 
55 const char *parse_task_states(struct tep_format_field *state_field);
56 
57 void parse_proc_kallsyms(struct tep_handle *pevent, char *file, unsigned int size);
58 void parse_ftrace_printk(struct tep_handle *pevent, char *file, unsigned int size);
59 void parse_saved_cmdline(struct tep_handle *pevent, char *file, unsigned int size);
60 
61 ssize_t trace_report(int fd, struct trace_event *tevent, bool repipe);
62 
63 unsigned long long read_size(struct tep_event *event, void *ptr, int size);
64 unsigned long long eval_flag(const char *flag);
65 
66 int read_tracing_data(int fd, struct list_head *pattrs);
67 
68 /*
69  * Return the tracepoint name in the format "subsystem:event_name",
70  * callers should free the returned string.
71  */
72 char *tracepoint_id_to_name(u64 config);
73 
74 struct tracing_data {
75 	/* size is only valid if temp is 'true' */
76 	ssize_t size;
77 	bool temp;
78 	char temp_file[50];
79 };
80 
81 struct tracing_data *tracing_data_get(struct list_head *pattrs,
82 				      int fd, bool temp);
83 int tracing_data_put(struct tracing_data *tdata);
84 
85 
86 struct addr_location;
87 
88 struct perf_session;
89 struct perf_stat_config;
90 
91 struct scripting_ops {
92 	const char *name;
93 	const char *dirname; /* For script path .../scripts/<dirname>/... */
94 	int (*start_script)(const char *script, int argc, const char **argv,
95 			    struct perf_session *session);
96 	int (*flush_script) (void);
97 	int (*stop_script) (void);
98 	void (*process_event) (union perf_event *event,
99 			       struct perf_sample *sample,
100 			       struct evsel *evsel,
101 			       struct addr_location *al,
102 			       struct addr_location *addr_al);
103 	void (*process_switch)(union perf_event *event,
104 			       struct perf_sample *sample,
105 			       struct machine *machine);
106 	void (*process_auxtrace_error)(struct perf_session *session,
107 				       union perf_event *event);
108 	void (*process_stat)(struct perf_stat_config *config,
109 			     struct evsel *evsel, u64 tstamp);
110 	void (*process_stat_interval)(u64 tstamp);
111 	void (*process_throttle)(union perf_event *event,
112 				 struct perf_sample *sample,
113 				 struct machine *machine);
114 	int (*generate_script) (struct tep_handle *pevent, const char *outfile);
115 };
116 
117 extern unsigned int scripting_max_stack;
118 
119 int script_spec_register(const char *spec, struct scripting_ops *ops);
120 
121 void script_fetch_insn(struct perf_sample *sample, struct thread *thread,
122 		       struct machine *machine);
123 
124 void setup_perl_scripting(void);
125 void setup_python_scripting(void);
126 
127 struct scripting_context {
128 	struct tep_handle *pevent;
129 	void *event_data;
130 	union perf_event *event;
131 	struct perf_sample *sample;
132 	struct evsel *evsel;
133 	struct addr_location *al;
134 	struct addr_location *addr_al;
135 	struct perf_session *session;
136 };
137 
138 void scripting_context__update(struct scripting_context *scripting_context,
139 			       union perf_event *event,
140 			       struct perf_sample *sample,
141 			       struct evsel *evsel,
142 			       struct addr_location *al,
143 			       struct addr_location *addr_al);
144 
145 int common_pc(struct scripting_context *context);
146 int common_flags(struct scripting_context *context);
147 int common_lock_depth(struct scripting_context *context);
148 
149 #define SAMPLE_FLAGS_BUF_SIZE 64
150 int perf_sample__sprintf_flags(u32 flags, char *str, size_t sz);
151 
152 #if defined(LIBTRACEEVENT_VERSION) &&  LIBTRACEEVENT_VERSION >= MAKE_LIBTRACEEVENT_VERSION(1, 5, 0)
153 #include <traceevent/event-parse.h>
154 
tep_field_is_relative(unsigned long flags)155 static inline bool tep_field_is_relative(unsigned long flags)
156 {
157 	return (flags & TEP_FIELD_IS_RELATIVE) != 0;
158 }
159 #else
160 #include <linux/compiler.h>
161 
tep_field_is_relative(unsigned long flags __maybe_unused)162 static inline bool tep_field_is_relative(unsigned long flags __maybe_unused)
163 {
164 	return false;
165 }
166 #endif
167 
168 #endif /* _PERF_UTIL_TRACE_EVENT_H */
169