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When unloading dependencies make sure they are removed from all the

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associated lists:
   remove RTLD_GLOBAL objects from global objects list;
   remove the parent object from dldags list of its children.

Previosly we were doing that only to the top-level object OF the DAG
being unloaded and all its dependencies were ignored, leading to
mysterious crashes later.

Submitted by:	peter (partially)
This commit is contained in:
Alexander Kabaev 2003-02-10 23:15:07 +00:00
parent 25c4325446
commit f8d7256a27
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=110659
1 changed files with 10 additions and 9 deletions
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19
libexec/rtld-elf/rtld.c
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@ -2131,17 +2131,9 @@ unload_object(Obj_Entry *root)
{
Obj_Entry *obj;
Obj_Entry **linkp;
Objlist_Entry *elm;
assert(root->refcount == 0);
/* Remove the DAG from all objects' DAG lists. */
STAILQ_FOREACH(elm, &root->dagmembers , link)
objlist_remove(&elm->obj->dldags, root);
/* Remove the DAG from the RTLD_GLOBAL list. */
objlist_remove(&list_global, root);
/* Unmap all objects that are no longer referenced. */
linkp = &obj_list->next;
while ((obj = *linkp) != NULL) {
@ -2162,14 +2154,23 @@ static void
unref_dag(Obj_Entry *root)
{
const Needed_Entry *needed;
Objlist_Entry *elm;
if (root->refcount == 0)
return;
root->refcount--;
if (root->refcount == 0)
if (root->refcount == 0) {
for (needed = root->needed; needed != NULL; needed = needed->next)
if (needed->obj != NULL)
unref_dag(needed->obj);
/* Remove the object from the RTLD_GLOBAL list. */
objlist_remove(&list_global, root);
/* Remove the object from all objects' DAG lists. */
STAILQ_FOREACH(elm, &root->dagmembers , link)
objlist_remove(&elm->obj->dldags, root);
}
}
/*