liblttng-ust/tracepoint-weak-test.c

   1 /*
   2  * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.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 /* Test compiler support for weak symbols with hidden visibility. */
  20 int __tracepoint_test_symbol1 __attribute__((weak, visibility("hidden")));
  21 void *__tracepoint_test_symbol2 __attribute__((weak, visibility("hidden")));
  22 struct {
  23         char a[24];
  24 } __tracepoint_test_symbol3 __attribute__((weak, visibility("hidden")));
  25
  26 __attribute__((visibility("hidden")))
  27 void *lttng_ust_tp_check_weak_hidden1(void)
  28 {
  29         return &__tracepoint_test_symbol1;
  30 }
  31
  32 __attribute__((visibility("hidden")))
  33 void *lttng_ust_tp_check_weak_hidden2(void)
  34 {
  35         return &__tracepoint_test_symbol2;
  36 }
  37
  38 __attribute__((visibility("hidden")))
  39 void *lttng_ust_tp_check_weak_hidden3(void)
  40 {
  41         return &__tracepoint_test_symbol3;
  42 }