dlopen_testlib_ifunc.c revision 31b88da8431096a6df276705046ca7a012fa3530 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdio.h>
18#include <stdlib.h>
19
20const char* foo() __attribute__ ((ifunc ("foo_ifunc")));
21
22const char* f1() {
23  return "unset";
24}
25
26const char* f2() {
27  return "set";
28}
29
30void* foo_ifunc() {
31   char* choice = getenv("IFUNC_CHOICE");
32   return choice == NULL ? f1 : f2;
33}
34
35const char* foo_library() {
36   return foo();
37}