test_dlclose_destruction.c revision 7f101d6dd0e9da88ffed3aef0686758950285b3d 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29/* this program is used to check that static C++ destructors are
30 * properly called when dlclose() is called. We do this by using
31 * a helper C++ shared library.
32 *
33 * See libdlclosetest1.cpp for details.
34 */
35#include <dlfcn.h>
36#include <stdio.h>
37
38static int
39check_library(const char*  libname)
40{
41    void*  lib = dlopen(libname, RTLD_NOW);
42    int*   to_x;
43    void  (*set_y)(int *);
44    int    y = 0;
45
46    if (lib == NULL) {
47        fprintf(stderr, "Could not load shared library %s: %s\n", libname, dlerror());
48        return 1;
49    }
50
51    fprintf(stderr, "%s loaded.\n", libname);
52
53    to_x = dlsym(lib, "x");
54    if (to_x == NULL) {
55        fprintf(stderr, "Could not access global DLL variable (x) in %s: %s\n", libname, dlerror());
56        return 10;
57    }
58
59    if (*to_x != 1) {
60        fprintf(stderr, "Constructor was not run on dlopen(\"%s\") !\n", libname);
61        return 11;
62    }
63
64    set_y = dlsym(lib, "set_y");
65    if (set_y == NULL) {
66        fprintf(stderr, "Could not access global DLL function (set_y) in %s: %s\n", libname, dlerror());
67        return 12;
68    }
69
70    y = 0;
71    (*set_y)(&y);
72
73    if (dlclose(lib) < 0) {
74        fprintf(stderr, "Could not unload shared library %s: %s\n", libname, dlerror());
75        return 2;
76    }
77
78    fprintf(stderr, "%s unloaded.\n", libname);
79    if (y != 2) {
80        fprintf(stderr, "Static destructors was not called on dlclose()!\n");
81        return 2;
82    }
83    return 0;
84}
85
86int main(void)
87{
88    /* Testing static C++ construction/destruction */
89    if (check_library("libdlclosetest1.so"))
90        return 1;
91    if (check_library("libdlclosetest2.so"))
92        return 2;
93    return 0;
94}
95