Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/elf/unload.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
91 lines (73 sloc)
1.9 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* 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; | |
} |