Linux Kernel  3.7.1
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define_trace.h
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1 /*
2  * Trace files that want to automate creation of all tracepoints defined
3  * in their file should include this file. The following are macros that the
4  * trace file may define:
5  *
6  * TRACE_SYSTEM defines the system the tracepoint is for
7  *
8  * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
9  * This macro may be defined to tell define_trace.h what file to include.
10  * Note, leave off the ".h".
11  *
12  * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
13  * then this macro can define the path to use. Note, the path is relative to
14  * define_trace.h, not the file including it. Full path names for out of tree
15  * modules must be used.
16  */
17 
18 #ifdef CREATE_TRACE_POINTS
19 
20 /* Prevent recursion */
21 #undef CREATE_TRACE_POINTS
22 
23 #include <linux/stringify.h>
24 
25 #undef TRACE_EVENT
26 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
27  DEFINE_TRACE(name)
28 
29 #undef TRACE_EVENT_CONDITION
30 #define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
31  TRACE_EVENT(name, \
32  PARAMS(proto), \
33  PARAMS(args), \
34  PARAMS(tstruct), \
35  PARAMS(assign), \
36  PARAMS(print))
37 
38 #undef TRACE_EVENT_FN
39 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
40  assign, print, reg, unreg) \
41  DEFINE_TRACE_FN(name, reg, unreg)
42 
43 #undef DEFINE_EVENT
44 #define DEFINE_EVENT(template, name, proto, args) \
45  DEFINE_TRACE(name)
46 
47 #undef DEFINE_EVENT_PRINT
48 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
49  DEFINE_TRACE(name)
50 
51 #undef DEFINE_EVENT_CONDITION
52 #define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
53  DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
54 
55 #undef DECLARE_TRACE
56 #define DECLARE_TRACE(name, proto, args) \
57  DEFINE_TRACE(name)
58 
59 #undef TRACE_INCLUDE
60 #undef __TRACE_INCLUDE
61 
62 #ifndef TRACE_INCLUDE_FILE
63 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
64 # define UNDEF_TRACE_INCLUDE_FILE
65 #endif
66 
67 #ifndef TRACE_INCLUDE_PATH
68 # define __TRACE_INCLUDE(system) <trace/events/system.h>
69 # define UNDEF_TRACE_INCLUDE_PATH
70 #else
71 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
72 #endif
73 
74 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
75 
76 /* Let the trace headers be reread */
77 #define TRACE_HEADER_MULTI_READ
78 
79 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
80 
81 /* Make all open coded DECLARE_TRACE nops */
82 #undef DECLARE_TRACE
83 #define DECLARE_TRACE(name, proto, args)
84 
85 #ifdef CONFIG_EVENT_TRACING
86 #include <trace/ftrace.h>
87 #endif
88 
89 #undef TRACE_EVENT
90 #undef TRACE_EVENT_FN
91 #undef TRACE_EVENT_CONDITION
92 #undef DECLARE_EVENT_CLASS
93 #undef DEFINE_EVENT
94 #undef DEFINE_EVENT_PRINT
95 #undef DEFINE_EVENT_CONDITION
96 #undef TRACE_HEADER_MULTI_READ
97 #undef DECLARE_TRACE
98 
99 /* Only undef what we defined in this file */
100 #ifdef UNDEF_TRACE_INCLUDE_FILE
101 # undef TRACE_INCLUDE_FILE
102 # undef UNDEF_TRACE_INCLUDE_FILE
103 #endif
104 
105 #ifdef UNDEF_TRACE_INCLUDE_PATH
106 # undef TRACE_INCLUDE_PATH
107 # undef UNDEF_TRACE_INCLUDE_PATH
108 #endif
109 
110 /* We may be processing more files */
111 #define CREATE_TRACE_POINTS
112 
113 #endif /* CREATE_TRACE_POINTS */