include/trace/define_trace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Trace files that want to automate creation of all tracepoints defined
   4  * in their file should include this file. The following are macros that the
   5  * trace file may define:
   6  *
   7  * TRACE_SYSTEM defines the system the tracepoint is for
   8  *
   9  * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
  10  *     This macro may be defined to tell define_trace.h what file to include.
  11  *     Note, leave off the ".h".
  12  *
  13  * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
  14  *     then this macro can define the path to use. Note, the path is relative to
  15  *     define_trace.h, not the file including it. Full path names for out of tree
  16  *     modules must be used.
  17  */
  18
  19 #ifdef CREATE_TRACE_POINTS
  20
  21 /* Prevent recursion */
  22 #undef CREATE_TRACE_POINTS
  23
  24 #include <linux/stringify.h>
  25
  26 #undef TRACE_EVENT
  27 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)  \
  28         DEFINE_TRACE(name)
  29
  30 #undef TRACE_EVENT_CONDITION
  31 #define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
  32         TRACE_EVENT(name,                                               \
  33                 PARAMS(proto),                                          \
  34                 PARAMS(args),                                           \
  35                 PARAMS(tstruct),                                        \
  36                 PARAMS(assign),                                         \
  37                 PARAMS(print))
  38
  39 #undef TRACE_EVENT_FN
  40 #define TRACE_EVENT_FN(name, proto, args, tstruct,              \
  41                 assign, print, reg, unreg)                      \
  42         DEFINE_TRACE_FN(name, reg, unreg)
  43
  44 #undef TRACE_EVENT_FN_COND
  45 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct,           \
  46                 assign, print, reg, unreg)                      \
  47         DEFINE_TRACE_FN(name, reg, unreg)
  48
  49 #undef DEFINE_EVENT
  50 #define DEFINE_EVENT(template, name, proto, args) \
  51         DEFINE_TRACE(name)
  52
  53 #undef DEFINE_EVENT_FN
  54 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
  55         DEFINE_TRACE_FN(name, reg, unreg)
  56
  57 #undef DEFINE_EVENT_PRINT
  58 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  59         DEFINE_TRACE(name)
  60
  61 #undef DEFINE_EVENT_CONDITION
  62 #define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
  63         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  64
  65 #undef DECLARE_TRACE
  66 #define DECLARE_TRACE(name, proto, args)        \
  67         DEFINE_TRACE(name)
  68
  69 #undef TRACE_INCLUDE
  70 #undef __TRACE_INCLUDE
  71
  72 #ifndef TRACE_INCLUDE_FILE
  73 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
  74 # define UNDEF_TRACE_INCLUDE_FILE
  75 #endif
  76
  77 #ifndef TRACE_INCLUDE_PATH
  78 # define __TRACE_INCLUDE(system) <trace/events/system.h>
  79 # define UNDEF_TRACE_INCLUDE_PATH
  80 #else
  81 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  82 #endif
  83
  84 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  85
  86 /* Let the trace headers be reread */
  87 #define TRACE_HEADER_MULTI_READ
  88
  89 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  90
  91 /* Make all open coded DECLARE_TRACE nops */
  92 #undef DECLARE_TRACE
  93 #define DECLARE_TRACE(name, proto, args)
  94
  95 #ifdef TRACEPOINTS_ENABLED
  96 #include <trace/trace_events.h>
  97 #include <trace/perf.h>
  98 #include <trace/bpf_probe.h>
  99 #endif
 100
 101 #undef TRACE_EVENT
 102 #undef TRACE_EVENT_FN
 103 #undef TRACE_EVENT_FN_COND
 104 #undef TRACE_EVENT_CONDITION
 105 #undef DECLARE_EVENT_CLASS
 106 #undef DEFINE_EVENT
 107 #undef DEFINE_EVENT_FN
 108 #undef DEFINE_EVENT_PRINT
 109 #undef DEFINE_EVENT_CONDITION
 110 #undef TRACE_HEADER_MULTI_READ
 111 #undef DECLARE_TRACE
 112
 113 /* Only undef what we defined in this file */
 114 #ifdef UNDEF_TRACE_INCLUDE_FILE
 115 # undef TRACE_INCLUDE_FILE
 116 # undef UNDEF_TRACE_INCLUDE_FILE
 117 #endif
 118
 119 #ifdef UNDEF_TRACE_INCLUDE_PATH
 120 # undef TRACE_INCLUDE_PATH
 121 # undef UNDEF_TRACE_INCLUDE_PATH
 122 #endif
 123
 124 /* We may be processing more files */
 125 #define CREATE_TRACE_POINTS
 126
 127 #endif /* CREATE_TRACE_POINTS */