tests/hello/tp.c

   1 /*
   2  * Copyright (C) 2009  Pierre-Marc Fournier
   3  * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #include <ust/marker.h>
  21 #include "usterr.h"
  22
  23 #define TRACEPOINT_CREATE_PROBES
  24 #include "tp.h"
  25
  26 struct hello_trace_struct {
  27         char *message;
  28 };
  29
  30 struct hello_trace_struct hello_struct = {
  31         .message = "ehlo\n",
  32 };
  33
  34 void tptest_probe(void *data, int anint)
  35 {
  36         struct hello_trace_struct *hello;
  37         hello = (struct hello_trace_struct *)data;
  38         DBG("in tracepoint probe...");
  39         printf("this is the message: %s\n", hello->message);
  40 }
  41
  42 void tptest2_probe(void *data)
  43 {
  44 }
  45
  46 static void __attribute__((constructor)) init()
  47 {
  48         DBG("connecting tracepoint...\n");
  49         /*
  50          * Note: this is an internal API that will be used within
  51          * TRACEPOINT_EVENT only eventually.
  52          */
  53         __register_tracepoint(hello_tptest, tptest_probe, &hello_struct);
  54         __register_tracepoint(hello_tptest2, tptest2_probe, &hello_struct);
  55 }