Linux Kernel  3.7.1
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probe-event.h
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1 #ifndef _PROBE_EVENT_H
2 #define _PROBE_EVENT_H
3 
4 #include <stdbool.h>
5 #include "strlist.h"
6 #include "strfilter.h"
7 
8 extern bool probe_event_dry_run;
9 
10 /* kprobe-tracer and uprobe-tracer tracing point */
11 struct probe_trace_point {
12  char *symbol; /* Base symbol */
13  char *module; /* Module name */
14  unsigned long offset; /* Offset from symbol */
15  bool retprobe; /* Return probe flag */
16 };
17 
18 /* probe-tracer tracing argument referencing offset */
19 struct probe_trace_arg_ref {
20  struct probe_trace_arg_ref *next; /* Next reference */
21  long offset; /* Offset value */
22 };
23 
24 /* kprobe-tracer and uprobe-tracer tracing argument */
25 struct probe_trace_arg {
26  char *name; /* Argument name */
27  char *value; /* Base value */
28  char *type; /* Type name */
29  struct probe_trace_arg_ref *ref; /* Referencing offset */
30 };
31 
32 /* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
33 struct probe_trace_event {
34  char *event; /* Event name */
35  char *group; /* Group name */
36  struct probe_trace_point point; /* Trace point */
37  int nargs; /* Number of args */
38  bool uprobes; /* uprobes only */
39  struct probe_trace_arg *args; /* Arguments */
40 };
41 
42 /* Perf probe probing point */
43 struct perf_probe_point {
44  char *file; /* File path */
45  char *function; /* Function name */
46  int line; /* Line number */
47  bool retprobe; /* Return probe flag */
48  char *lazy_line; /* Lazy matching pattern */
49  unsigned long offset; /* Offset from function entry */
50 };
51 
52 /* Perf probe probing argument field chain */
53 struct perf_probe_arg_field {
54  struct perf_probe_arg_field *next; /* Next field */
55  char *name; /* Name of the field */
56  long index; /* Array index number */
57  bool ref; /* Referencing flag */
58 };
59 
60 /* Perf probe probing argument */
61 struct perf_probe_arg {
62  char *name; /* Argument name */
63  char *var; /* Variable name */
64  char *type; /* Type name */
65  struct perf_probe_arg_field *field; /* Structure fields */
66 };
67 
68 /* Perf probe probing event (point + arg) */
69 struct perf_probe_event {
70  char *event; /* Event name */
71  char *group; /* Group name */
72  struct perf_probe_point point; /* Probe point */
73  int nargs; /* Number of arguments */
74  bool uprobes;
75  struct perf_probe_arg *args; /* Arguments */
76 };
77 
78 
79 /* Line number container */
80 struct line_node {
81  struct list_head list;
82  int line;
83 };
84 
85 /* Line range */
86 struct line_range {
87  char *file; /* File name */
88  char *function; /* Function name */
89  int start; /* Start line number */
90  int end; /* End line number */
91  int offset; /* Start line offset */
92  char *path; /* Real path name */
93  char *comp_dir; /* Compile directory */
94  struct list_head line_list; /* Visible lines */
95 };
96 
97 /* List of variables */
98 struct variable_list {
99  struct probe_trace_point point; /* Actual probepoint */
100  struct strlist *vars; /* Available variables */
101 };
102 
103 /* Command string to events */
104 extern int parse_perf_probe_command(const char *cmd,
105  struct perf_probe_event *pev);
106 
107 /* Events to command string */
108 extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
109 extern char *synthesize_probe_trace_command(struct probe_trace_event *tev);
110 extern int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf,
111  size_t len);
112 
113 /* Check the perf_probe_event needs debuginfo */
114 extern bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
115 
116 /* Release event contents */
117 extern void clear_perf_probe_event(struct perf_probe_event *pev);
118 
119 /* Command string to line-range */
120 extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
121 
122 /* Internal use: Return kernel/module path */
123 extern const char *kernel_get_module_path(const char *module);
124 
125 extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
126  int max_probe_points, const char *module,
127  bool force_add);
128 extern int del_perf_probe_events(struct strlist *dellist);
129 extern int show_perf_probe_events(void);
130 extern int show_line_range(struct line_range *lr, const char *module);
131 extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
132  int max_probe_points, const char *module,
133  struct strfilter *filter, bool externs);
134 extern int show_available_funcs(const char *module, struct strfilter *filter,
135  bool user);
136 
137 /* Maximum index number of event-name postfix */
138 #define MAX_EVENT_INDEX 1024
139 
140 #endif /*_PROBE_EVENT_H */
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