include/ust/define_trace.h

   1 /*
   2  * Copyright (C) 2009     Steven Rostedt <srostedt@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation;
   7  * version 2.1 of the License.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  17  *
  18  *
  19  * Trace files that want to automate creationg of all tracepoints defined
  20  * in their file should include this file. The following are macros that the
  21  * trace file may define:
  22  *
  23  * TRACE_SYSTEM defines the system the tracepoint is for
  24  *
  25  * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
  26  *     This macro may be defined to tell define_trace.h what file to include.
  27  *     Note, leave off the ".h".
  28  *
  29  * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
  30  *     then this macro can define the path to use. Note, the path is relative to
  31  *     define_trace.h, not the file including it. Full path names for out of tree
  32  *     modules must be used.
  33  */
  34
  35 #ifdef TRACEPOINT_CREATE_PROBES
  36
  37 /* Prevent recursion */
  38 #undef TRACEPOINT_CREATE_PROBES
  39
  40 #include <ust/kcompat/stringify.h>
  41
  42 #undef TRACEPOINT_EVENT
  43 #define TRACEPOINT_EVENT(name, proto, args, fields)             \
  44         _DEFINE_TRACEPOINT(name)
  45
  46 #undef TRACEPOINT_EVENT_INSTANCE
  47 #define TRACEPOINT_EVENT_INSTANCE(template, name, proto, args)  \
  48         _DEFINE_TRACEPOINT(name)
  49
  50 #undef TRACEPOINT_EVENT_NOARGS
  51 #define TRACEPOINT_EVENT_NOARGS(name, fields)                   \
  52         _DEFINE_TRACEPOINT(name)
  53
  54 #undef TRACEPOINT_EVENT_INSTANCE_NOARGS
  55 #define TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name)        \
  56         _DEFINE_TRACEPOINT(name)
  57
  58 #undef TRACE_INCLUDE
  59 #undef __TRACE_INCLUDE
  60
  61 #ifndef TRACE_INCLUDE_FILE
  62 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
  63 # define UNDEF_TRACE_INCLUDE_FILE
  64 #endif
  65
  66 #ifndef TRACE_INCLUDE_PATH
  67 # define __TRACE_INCLUDE(system) <trace/events/system.h>
  68 # define UNDEF_TRACE_INCLUDE_PATH
  69 #else
  70 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  71 #endif
  72
  73 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  74
  75 /* Let the trace headers be reread */
  76 #define TRACE_HEADER_MULTI_READ
  77
  78 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  79
  80 #ifndef CONFIG_NO_EVENT_TRACING
  81 #include <ust/ust_trace.h>
  82 #endif
  83
  84 #undef TRACEPOINT_EVENT
  85 #undef TRACEPOINT_EVENT_CLASS
  86 #undef TRACEPOINT_EVENT_INSTANCE
  87 #undef TRACEPOINT_EVENT_NOARGS
  88 #undef TRACEPOINT_EVENT_CLASS_NOARGS
  89 #undef TRACEPOINT_EVENT_INSTANCE_NOARGS
  90 #undef TRACE_HEADER_MULTI_READ
  91
  92 /* Only undef what we defined in this file */
  93 #ifdef UNDEF_TRACE_INCLUDE_FILE
  94 # undef TRACE_INCLUDE_FILE
  95 # undef UNDEF_TRACE_INCLUDE_FILE
  96 #endif
  97
  98 #ifdef UNDEF_TRACE_INCLUDE_PATH
  99 # undef TRACE_INCLUDE_PATH
 100 # undef UNDEF_TRACE_INCLUDE_PATH
 101 #endif
 102
 103 /* We may be processing more files */
 104 #define TRACEPOINT_CREATE_PROBES
 105
 106 #endif /* TRACEPOINT_CREATE_PROBES */