diff options
author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
---|---|---|
committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/elf/unload.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.xz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/elf/unload.c')
-rw-r--r-- | REORG.TODO/elf/unload.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/REORG.TODO/elf/unload.c b/REORG.TODO/elf/unload.c new file mode 100644 index 0000000000..4566f226f8 --- /dev/null +++ b/REORG.TODO/elf/unload.c @@ -0,0 +1,91 @@ +/* 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; +} |