lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Test for unloading (really unmapping) of objects. By Franz Sirl. |
| 2 | This test does not have to passed in all dlopen() et.al. implementation |
| 3 | since it is not required the unloading actually happens. But we |
| 4 | require it for glibc. */ |
| 5 | |
| 6 | #include <dlfcn.h> |
| 7 | #include <link.h> |
| 8 | #include <mcheck.h> |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | |
| 12 | #define MAPS ((struct link_map *) _r_debug.r_map) |
| 13 | |
| 14 | #define OUT \ |
| 15 | for (map = MAPS; map != NULL; map = map->l_next) \ |
| 16 | if (map->l_type == lt_loaded) \ |
| 17 | printf ("name = \"%s\", direct_opencount = %d\n", \ |
| 18 | map->l_name, (int) map->l_direct_opencount); \ |
| 19 | fflush (stdout) |
| 20 | |
| 21 | typedef struct |
| 22 | { |
| 23 | void *next; |
| 24 | } strct; |
| 25 | |
| 26 | int |
| 27 | main (void) |
| 28 | { |
| 29 | void *sohandle; |
| 30 | strct *testdat; |
| 31 | int ret; |
| 32 | int result = 0; |
| 33 | struct link_map *map; |
| 34 | |
| 35 | mtrace (); |
| 36 | |
| 37 | puts ("\nBefore"); |
| 38 | OUT; |
| 39 | |
| 40 | sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
| 41 | if (sohandle == NULL) |
| 42 | { |
| 43 | printf ("*** first dlopen failed: %s\n", dlerror ()); |
| 44 | exit (1); |
| 45 | } |
| 46 | |
| 47 | puts ("\nAfter loading unloadmod.so"); |
| 48 | OUT; |
| 49 | |
| 50 | testdat = dlsym (sohandle, "testdat"); |
| 51 | testdat->next = (void *) -1; |
| 52 | |
| 53 | ret = dlclose (sohandle); |
| 54 | if (ret != 0) |
| 55 | { |
| 56 | puts ("*** first dlclose failed"); |
| 57 | result = 1; |
| 58 | } |
| 59 | |
| 60 | puts ("\nAfter closing unloadmod.so"); |
| 61 | OUT; |
| 62 | |
| 63 | sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
| 64 | if (sohandle == NULL) |
| 65 | { |
| 66 | printf ("*** second dlopen failed: %s\n", dlerror ()); |
| 67 | exit (1); |
| 68 | } |
| 69 | |
| 70 | puts ("\nAfter loading unloadmod.so the second time"); |
| 71 | OUT; |
| 72 | |
| 73 | testdat = dlsym (sohandle, "testdat"); |
| 74 | if (testdat->next == (void *) -1) |
| 75 | { |
| 76 | puts ("*** testdat->next == (void *) -1"); |
| 77 | result = 1; |
| 78 | } |
| 79 | |
| 80 | ret = dlclose (sohandle); |
| 81 | if (ret != 0) |
| 82 | { |
| 83 | puts ("*** second dlclose failed"); |
| 84 | result = 1; |
| 85 | } |
| 86 | |
| 87 | puts ("\nAfter closing unloadmod.so again"); |
| 88 | OUT; |
| 89 | |
| 90 | return result; |
| 91 | } |