157 lines
3.3 KiB
C
157 lines
3.3 KiB
C
#include <dlfcn.h>
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#include <libintl.h>
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#include <link.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int
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check_loaded_objects (const char **loaded)
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{
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struct link_map *lm;
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int n;
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int *found = NULL;
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int errors = 0;
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for (n = 0; loaded[n]; n++)
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/* NOTHING */;
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if (n)
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{
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found = (int *) alloca (sizeof (int) * n);
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memset (found, 0, sizeof (int) * n);
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}
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printf(" Name\n");
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printf(" --------------------------------------------------------\n");
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for (lm = _r_debug.r_map; lm; lm = lm->l_next)
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{
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if (lm->l_name && lm->l_name[0])
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printf(" %s, count = %d\n", lm->l_name, (int) lm->l_opencount);
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if (lm->l_type == lt_loaded && lm->l_name)
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{
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int match = 0;
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for (n = 0; loaded[n] != NULL; n++)
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{
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if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
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{
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found[n] = 1;
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match = 1;
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break;
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}
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}
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if (match == 0)
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{
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++errors;
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printf ("ERRORS: %s is not unloaded\n", lm->l_name);
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}
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}
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}
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for (n = 0; loaded[n] != NULL; n++)
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{
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if (found[n] == 0)
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{
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++errors;
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printf ("ERRORS: %s is not loaded\n", loaded[n]);
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}
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}
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return errors;
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}
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extern void c_function (void);
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extern char *dirname (__const char *__filename);
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int
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main (int argc, char **argv)
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{
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void *obj;
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const char *loaded[] = { NULL, NULL, NULL};
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int errors = 0;
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void (*f) (void);
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const char *dir = dirname (argv [0]);
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char *oldfilename;
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char *newfilename;
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c_function ();
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printf ("\nThis is what is in memory now:\n");
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errors += check_loaded_objects (loaded);
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printf( "Loading shared object neededobj6.so\n");
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obj = dlopen( "neededobj6.so", RTLD_LAZY);
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if (obj == NULL)
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{
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printf ("%s\n", dlerror ());
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exit (1);
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}
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f = dlsym (obj, "a2_function");
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if (f == NULL)
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{
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printf ("%s\n", dlerror ());
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exit (1);
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}
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f ();
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loaded[0] = "neededobj5.so";
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loaded[1] = "neededobj6.so";
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errors += check_loaded_objects (loaded);
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printf ("Closing neededobj6.so\n");
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dlclose (obj);
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loaded[0] = NULL;
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errors += check_loaded_objects (loaded);
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printf ("Rename neededobj5.so\n");
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oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so"));
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strcpy (oldfilename, dir);
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strcat (oldfilename, "/");
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strcat (oldfilename, "neededobj5.so");
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newfilename = alloca (strlen (oldfilename) + sizeof (".renamed"));
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strcpy (newfilename, oldfilename);
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strcat (newfilename, ".renamed");
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if (rename (oldfilename, newfilename))
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{
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perror ("rename");
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exit (1);
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}
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printf( "Loading shared object neededobj6.so\n");
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obj = dlopen( "neededobj6.so", RTLD_LAZY);
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if (obj == NULL)
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printf ("%s\n", dlerror ());
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else
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{
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printf ("neededobj6.so should fail to load\n");
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exit (1);
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}
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printf( "Loading shared object neededobj1.so\n");
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obj = dlopen( "neededobj1.so", RTLD_LAZY);
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if (obj == NULL)
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{
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printf ("%s\n", dlerror ());
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exit (1);
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}
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errors += check_loaded_objects (loaded);
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f = dlsym (obj, "c_function");
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if (f == NULL)
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{
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printf ("%s\n", dlerror ());
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exit (1);
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}
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f ();
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printf ("Restore neededobj5.so\n");
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if (rename (newfilename, oldfilename))
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{
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perror ("rename");
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exit (1);
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}
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if (errors != 0)
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printf ("%d errors found\n", errors);
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return errors;
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}
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