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glibc/elf/neededtest.c
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#include <dlfcn.h> | |
#include <libintl.h> | |
#include <link.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#define MAPS ((struct link_map *) _r_debug.r_map) | |
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 = MAPS; lm; lm = lm->l_next) | |
{ | |
if (lm->l_name && lm->l_name[0]) | |
printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_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; | |
} | |
int | |
main (void) | |
{ | |
void *obj2[2]; | |
void *obj3; | |
const char *loaded[] = { NULL, NULL, NULL, NULL }; | |
int errors = 0; | |
printf ("\nThis is what is in memory now:\n"); | |
errors += check_loaded_objects (loaded); | |
printf( "Loading shared object neededobj3.so\n"); | |
obj3 = dlopen( "neededobj3.so", RTLD_LAZY); | |
if (obj3 == NULL) | |
{ | |
printf ("%s\n", dlerror ()); | |
exit (1); | |
} | |
loaded[0] = "neededobj1.so"; | |
loaded[1] = "neededobj2.so"; | |
loaded[2] = "neededobj3.so"; | |
errors += check_loaded_objects (loaded); | |
printf ("Now loading shared object neededobj2.so\n"); | |
obj2[0] = dlopen ("neededobj2.so", RTLD_LAZY); | |
if (obj2[0] == NULL) | |
{ | |
printf ("%s\n", dlerror ()); | |
exit (1); | |
} | |
errors += check_loaded_objects (loaded); | |
printf ("And loading shared object neededobj2.so again\n"); | |
obj2[1] = dlopen ("neededobj2.so", RTLD_LAZY); | |
if (obj2[1] == NULL) | |
{ | |
printf ("%s\n", dlerror ()); | |
exit (1); | |
} | |
errors += check_loaded_objects (loaded); | |
printf ("Closing neededobj2.so for the first time\n"); | |
dlclose (obj2[0]); | |
errors += check_loaded_objects (loaded); | |
printf ("Closing neededobj3.so\n"); | |
dlclose (obj3); | |
loaded[2] = NULL; | |
errors += check_loaded_objects (loaded); | |
printf ("Closing neededobj2.so for the second time\n"); | |
dlclose (obj2[1]); | |
loaded[0] = NULL; | |
loaded[1] = NULL; | |
errors += check_loaded_objects (loaded); | |
if (errors != 0) | |
printf ("%d errors found\n", errors); | |
return errors; | |
} |