summary refs log tree commit diff
path: root/elf/neededtest4.c
blob: 04ab10e4c9b48db0264a604de9fc7d2f6693e597 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
#include <dlfcn.h>
#include <libintl.h>
#include <link.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int
check_loaded_objects (const char **loaded)
{
  struct link_map *lm;
  int n;
  int *found = NULL;
  int errors = 0;

  for (n = 0; loaded[n]; n++)
    /* NOTHING */;

  if (n)
    {
      found = (int *) alloca (sizeof (int) * n);
      memset (found, 0, sizeof (int) * n);
    }

  printf("   Name\n");
  printf(" --------------------------------------------------------\n");
  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
    {
      if (lm->l_name && lm->l_name[0])
	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_opencount);
      if (lm->l_type == lt_loaded && lm->l_name)
	{
	  int match = 0;
	  for (n = 0; loaded[n] != NULL; n++)
	    {
	      if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
	        {
		  found[n] = 1;
		  match = 1;
		  break;
		}
	    }

	  if (match == 0)
	    {
	      ++errors;
	      printf ("ERRORS: %s is not unloaded\n", lm->l_name);
	    }
	}
    }

  for (n = 0; loaded[n] != NULL; n++)
    {
      if (found[n] == 0)
        {
	  ++errors;
	  printf ("ERRORS: %s is not loaded\n", loaded[n]);
	}
    }

  return errors;
}

extern void c_function (void);
extern char *dirname (__const char *__filename);

int
main (int argc, char **argv)
{
  void *obj;
  const char *loaded[] = { NULL, NULL, NULL};
  int errors = 0;
  void (*f) (void);
  const char *dir = dirname (argv [0]);
  char *oldfilename;
  char *newfilename;

  c_function ();

  printf ("\nThis is what is in memory now:\n");
  errors += check_loaded_objects (loaded);

  printf( "Loading shared object neededobj6.so\n");
  obj = dlopen( "neededobj6.so", RTLD_LAZY);
  if (obj == NULL)
    {
      printf ("%s\n", dlerror ());
      exit (1);
    }
  f = dlsym (obj, "a2_function");
  if (f == NULL)
    {
      printf ("%s\n", dlerror ());
      exit (1);
    }
  f ();
  loaded[0] = "neededobj5.so";
  loaded[1] = "neededobj6.so";
  errors += check_loaded_objects (loaded);

  printf ("Closing neededobj6.so\n");
  dlclose (obj);
  loaded[0] = NULL;
  errors += check_loaded_objects (loaded);

  printf ("Rename neededobj5.so\n");
  oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so"));
  strcpy (oldfilename, dir);
  strcat (oldfilename, "/");
  strcat (oldfilename, "neededobj5.so");
  newfilename = alloca (strlen (oldfilename) + sizeof (".renamed"));
  strcpy (newfilename, oldfilename);
  strcat (newfilename, ".renamed");
  if (rename (oldfilename, newfilename))
    {
      perror ("rename");
      exit (1);
    }

  printf( "Loading shared object neededobj6.so\n");
  obj = dlopen( "neededobj6.so", RTLD_LAZY);
  if (obj == NULL)
    printf ("%s\n", dlerror ());
  else
    {
      printf ("neededobj6.so should fail to load\n");
      exit (1);
    }

  printf( "Loading shared object neededobj1.so\n");
  obj = dlopen( "neededobj1.so", RTLD_LAZY);
  if (obj == NULL)
    {
      printf ("%s\n", dlerror ());
      exit (1);
    }
  errors += check_loaded_objects (loaded);
  f = dlsym (obj, "c_function");
  if (f == NULL)
    {
      printf ("%s\n", dlerror ());
      exit (1);
    }
  f ();

  printf ("Restore neededobj5.so\n");
  if (rename (newfilename, oldfilename))
    {
      perror ("rename");
      exit (1);
    }

  if (errors != 0)
    printf ("%d errors found\n", errors);
  return errors;
}