| /* Test for unloading (really unmapping) of objects. By Franz Sirl. |
| This test does not have to passed in all dlopen() et.al. implementation |
| since it is not required the unloading actually happens. But we |
| require it for glibc. */ |
| |
| #include <dlfcn.h> |
| #include <link.h> |
| #include <mcheck.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #define MAPS ((struct link_map *) _r_debug.r_map) |
| |
| #define OUT \ |
| for (map = MAPS; map != NULL; map = map->l_next) \ |
| if (map->l_type == lt_loaded) \ |
| printf ("name = \"%s\", direct_opencount = %d\n", \ |
| map->l_name, (int) map->l_direct_opencount); \ |
| fflush (stdout) |
| |
| typedef struct |
| { |
| void *next; |
| } strct; |
| |
| int |
| main (void) |
| { |
| void *sohandle; |
| strct *testdat; |
| int ret; |
| int result = 0; |
| struct link_map *map; |
| |
| mtrace (); |
| |
| puts ("\nBefore"); |
| OUT; |
| |
| sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
| if (sohandle == NULL) |
| { |
| printf ("*** first dlopen failed: %s\n", dlerror ()); |
| exit (1); |
| } |
| |
| puts ("\nAfter loading unloadmod.so"); |
| OUT; |
| |
| testdat = dlsym (sohandle, "testdat"); |
| testdat->next = (void *) -1; |
| |
| ret = dlclose (sohandle); |
| if (ret != 0) |
| { |
| puts ("*** first dlclose failed"); |
| result = 1; |
| } |
| |
| puts ("\nAfter closing unloadmod.so"); |
| OUT; |
| |
| sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
| if (sohandle == NULL) |
| { |
| printf ("*** second dlopen failed: %s\n", dlerror ()); |
| exit (1); |
| } |
| |
| puts ("\nAfter loading unloadmod.so the second time"); |
| OUT; |
| |
| testdat = dlsym (sohandle, "testdat"); |
| if (testdat->next == (void *) -1) |
| { |
| puts ("*** testdat->next == (void *) -1"); |
| result = 1; |
| } |
| |
| ret = dlclose (sohandle); |
| if (ret != 0) |
| { |
| puts ("*** second dlclose failed"); |
| result = 1; |
| } |
| |
| puts ("\nAfter closing unloadmod.so again"); |
| OUT; |
| |
| return result; |
| } |