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Update.
2000-08-19 Ulrich Drepper <drepper@redhat.com> * elf/Versions [ld] (GLIBC_2.2): Export _dl_check_map_versions. * elf/dl-deps.c (_dl_map_object_deps): If object was dependency of a dynamically loaded object remove old l_initfini list. * elf/dl-libc.c (free_mem): Used as __libc_subfreeres callback to remove some dynamically allocated memory blocks in the dynamic loading data structures. * elf/dl-load.c (add_name_to_object): Initialize dont_free to 0. * elf/dl-open.c (dl_open_workder): Don't call _dl_check_all_versions. Instead call _dl_check_map_versions only for the dependencies. * elf/rtld.c: Avoid unneccessary initializations. Mark l_libname information of initial objects as not free-able. * sysdeps/generic/ldsodefs.h (struct libname_list): Add dont_free element. * elf/filter.c: Call mtrace. * elf/restest1.c: Likewise. Close the objects. * elf/loadtest.c: Call mtrace. Check result of dlclose. Print more debug information. * elf/constload1.c: Add comment explaining not freed memory.
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ChangeLog
23
ChangeLog
@ -1,3 +1,26 @@
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2000-08-19 Ulrich Drepper <drepper@redhat.com>
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* elf/Versions [ld] (GLIBC_2.2): Export _dl_check_map_versions.
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* elf/dl-deps.c (_dl_map_object_deps): If object was dependency of
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a dynamically loaded object remove old l_initfini list.
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* elf/dl-libc.c (free_mem): Used as __libc_subfreeres callback to
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remove some dynamically allocated memory blocks in the dynamic
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loading data structures.
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* elf/dl-load.c (add_name_to_object): Initialize dont_free to 0.
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* elf/dl-open.c (dl_open_workder): Don't call _dl_check_all_versions.
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Instead call _dl_check_map_versions only for the dependencies.
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* elf/rtld.c: Avoid unneccessary initializations. Mark l_libname
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information of initial objects as not free-able.
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* sysdeps/generic/ldsodefs.h (struct libname_list): Add dont_free
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element.
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* elf/filter.c: Call mtrace.
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* elf/restest1.c: Likewise. Close the objects.
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* elf/loadtest.c: Call mtrace. Check result of dlclose. Print more
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debug information.
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* elf/constload1.c: Add comment explaining not freed memory.
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2000-08-18 Andreas Jaeger <aj@suse.de>
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* sysdeps/unix/sysv/linux/mips/bits/stat.h: Add pads to show
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@ -18,6 +18,10 @@ main (void)
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error (EXIT_FAILURE, errno, "cannot load module \"constload2.so\"");
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foo = dlsym (h, "foo");
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ret = foo ();
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/* Note that the following dlclose() call cannot unload the objects.
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Due to the introduced relocation dependency constload2.so depends
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on constload3.so and the dependencies of constload2.so on constload3.so
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is not visible to ld.so since it's done using dlopen(). */
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if (dlclose (h) != 0)
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{
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puts ("failed to close");
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@ -467,6 +467,14 @@ _dl_map_object_deps (struct link_map *map,
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while (runp != NULL && runp->done);
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}
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if (map->l_initfini != NULL && map->l_type == lt_loaded)
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{
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/* This object was previously loaded as a dependency and we have
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a separate l_initfini list. We don't need it anymore. */
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assert (map->l_searchlist.r_list == NULL);
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free (map->l_initfini);
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}
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/* Store the search list we built in the object. It will be used for
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searches in the scope of this object. */
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map->l_searchlist.r_list = malloc ((2 * nlist + 1
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@ -120,3 +120,27 @@ __libc_dlclose (void *__map)
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{
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return dlerror_run (do_dlclose, __map);
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}
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static void
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free_mem (void)
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{
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struct link_map *l;
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/* Remove all additional names added to the objects. */
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for (l = _dl_loaded; l != NULL; l = l->l_next)
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{
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struct libname_list *lnp = l->l_libname->next;
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l->l_libname->next = NULL;
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while (lnp != NULL)
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{
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struct libname_list *old = lnp;
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lnp = lnp->next;
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if (! old->dont_free)
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free (old);
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}
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}
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}
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text_set_element (__libc_subfreeres, free_mem);
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@ -322,6 +322,7 @@ add_name_to_object (struct link_map *l, const char *name)
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newname->name = memcpy (newname + 1, name, name_len);
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newname->next = NULL;
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newname->dont_free = 0;
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lastp->next = newname;
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}
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@ -88,6 +88,7 @@ dl_open_worker (void *a)
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struct link_map *new, *l;
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const char *dst;
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int lazy;
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unsigned int i;
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/* Maybe we have to expand a DST. */
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dst = strchr (file, '$');
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@ -163,7 +164,9 @@ dl_open_worker (void *a)
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_dl_map_object_deps (new, NULL, 0, 0);
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/* So far, so good. Now check the versions. */
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(void) _dl_check_all_versions (new, 0, 0);
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for (i = 0; i < new->l_searchlist.r_nlist; ++i)
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if (new->l_searchlist.r_list[i]->l_versions == NULL)
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(void) _dl_check_map_versions (new->l_searchlist.r_list[i], 0, 0);
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#ifdef SCOPE_DEBUG
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show_scope (new);
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@ -1,3 +1,4 @@
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#include <mcheck.h>
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#include <stdio.h>
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#include <string.h>
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@ -6,7 +7,11 @@ extern const char *foo (void);
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int
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main (void)
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{
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const char *s = foo ();
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const char *s;
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mtrace ();
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s = foo ();
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printf ("called `foo' from `%s'\n", s);
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@ -2,6 +2,7 @@
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#include <dlfcn.h>
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#include <errno.h>
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#include <error.h>
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#include <mcheck.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -66,10 +67,16 @@ static const struct
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#define NTESTS (sizeof (tests) / sizeof (tests[0]))
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#include <include/link.h>
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int
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main (void)
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{
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int count = TEST_ROUNDS;
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int result = 0;
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mtrace ();
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/* Just a seed. */
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srandom (TEST_ROUNDS);
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@ -102,23 +109,38 @@ main (void)
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fct (10);
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printf ("successfully loaded `%s'\n", testobjs[index].name);
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printf ("successfully loaded `%s', handle %p\n",
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testobjs[index].name, testobjs[index].handle);
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}
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else
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{
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dlclose (testobjs[index].handle);
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testobjs[index].handle = NULL;
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if (dlclose (testobjs[index].handle) != 0)
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{
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printf ("failed to close %s\n", testobjs[index].name);
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result = 1;
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}
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else
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printf ("successfully unloaded `%s', handle %p\n",
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testobjs[index].name, testobjs[index].handle);
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printf ("successfully unloaded `%s'\n", testobjs[index].name);
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testobjs[index].handle = NULL;
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}
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}
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/* Unload all loaded modules. */
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for (count = 0; count < NOBJS; ++count)
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if (testobjs[count].handle != NULL)
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dlclose (testobjs[count].handle);
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{ printf ("\nclose: %s: l_initfini = %p, l_versions = %p\n",
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testobjs[count].name,
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((struct link_map*)testobjs[count].handle)->l_initfini,
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((struct link_map*)testobjs[count].handle)->l_versions);
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if (dlclose (testobjs[count].handle) != 0)
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{
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printf ("failed to close %s\n", testobjs[count].name);
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result = 1;
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} }
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return 0;
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return result;
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}
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#include <dlfcn.h>
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#include <error.h>
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#include <mcheck.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -13,6 +14,8 @@ main (void)
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int res1;
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int res2;
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mtrace ();
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h1 = dlopen ("testobj1.so", RTLD_LAZY);
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if (h1 == NULL)
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error (EXIT_FAILURE, 0, "while loading `%s': %s", "testobj1.so",
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@ -37,6 +40,11 @@ main (void)
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res2 = fp2 (10);
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printf ("fp1(10) = %d\nfp2(10) = %d\n", res1, res2);
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if (dlclose (h1) != 0)
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error (EXIT_FAILURE, 0, "cannot close testobj1.so: %s\n", dlerror ());
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if (dlclose (h2) != 0)
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error (EXIT_FAILURE, 0, "cannot close testobj1_1.so: %s\n", dlerror ());
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return res1 != 42 || res2 != 72;
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}
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17
elf/rtld.c
17
elf/rtld.c
@ -590,7 +590,7 @@ of this helper program; chances are you did not intend to run this program.\n\
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the shared object is already loaded. */
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_dl_rtld_libname.name = ((const char *) _dl_loaded->l_addr
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+ ph->p_vaddr);
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_dl_rtld_libname.next = NULL;
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/* _dl_rtld_libname.next = NULL; Already zero. */
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_dl_rtld_map.l_libname = &_dl_rtld_libname;
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/* Ordinarilly, we would get additional names for the loader from
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@ -604,7 +604,7 @@ of this helper program; chances are you did not intend to run this program.\n\
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if (p)
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{
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_dl_rtld_libname2.name = p+1;
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_dl_rtld_libname2.next = NULL;
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/* _dl_rtld_libname2.next = NULL; Already zero. */
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_dl_rtld_libname.next = &_dl_rtld_libname2;
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}
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}
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@ -626,7 +626,7 @@ of this helper program; chances are you did not intend to run this program.\n\
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/* We were invoked directly, so the program might not have a
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PT_INTERP. */
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_dl_rtld_libname.name = _dl_rtld_map.l_name;
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_dl_rtld_libname.next = NULL;
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/* _dl_rtld_libname.next = NULL; Alread zero. */
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_dl_rtld_map.l_libname = &_dl_rtld_libname;
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}
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else
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HP_TIMING_NOW (start);
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do
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{
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/* While we are at it, help the memory handling a bit. We have to
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mark some data structures as allocated with the fake malloc()
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implementation in ld.so. */
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struct libname_list *lnp = l->l_libname->next;
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while (__builtin_expect (lnp != NULL, 0))
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{
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lnp->dont_free = 1;
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lnp = lnp->next;
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}
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if (l != &_dl_rtld_map)
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_dl_relocate_object (l, l->l_scope, _dl_lazy, consider_profiling);
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{
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const char *name; /* Name requested (before search). */
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struct libname_list *next; /* Link to next name for this object. */
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int dont_free; /* Flag whether this element should be freed
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if the object is not entirely unloaded. */
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};
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