2.5-18.1

1 files changed, 415 insertions, 284 deletions

diff --git a/elf/dl-close.c b/elf/dl-close.c
index c823b17..5cd8b9b 100644
--- a/elf/dl-close.c
+++ b/elf/dl-close.c
@@ -1,5 +1,5 @@
 /* Close a shared object opened by `_dl_open'.
-   Copyright (C) 1996-2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1996-2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,20 +19,29 @@
 
 #include <assert.h>
 #include <dlfcn.h>
+#include <errno.h>
 #include <libintl.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <bits/libc-lock.h>
 #include <ldsodefs.h>
 #include <sys/types.h>
 #include <sys/mman.h>
+#include <sysdep-cancel.h>
+#include <tls.h>
 
 
 /* Type of the constructor functions.  */
 typedef void (*fini_t) (void);
 
 
+/* Special l_idx value used to indicate which objects remain loaded.  */
+#define IDX_STILL_USED -1
+
+
 #ifdef USE_TLS
 /* Returns true we an non-empty was found.  */
 static bool
@@ -99,187 +108,156 @@ remove_slotinfo (size_t idx, struct dtv_slotinfo_list *listp, size_t disp,
 
 
 void
-internal_function
-_dl_close (void *_map)
+_dl_close_worker (struct link_map *map)
 {
-  struct reldep_list
-  {
-    struct link_map **rellist;
-    unsigned int nrellist;
-    unsigned int nhandled;
-    struct reldep_list *next;
-    bool handled[0];
-  } *reldeps = NULL;
-  struct link_map **list;
-  struct link_map *map = _map;
-  unsigned int i;
-  unsigned int *new_opencount;
-#ifdef USE_TLS
-  bool any_tls = false;
-#endif
-
-  /* First see whether we can remove the object at all.  */
-  if (__builtin_expect (map->l_flags_1 & DF_1_NODELETE, 0)
-      && map->l_init_called)
-    /* Nope.  Do nothing.  */
-    return;
-
-  if (__builtin_expect (map->l_opencount, 1) == 0)
-    GLRO(dl_signal_error) (0, map->l_name, NULL, N_("shared object not open"));
-
-  /* Acquire the lock.  */
-  __rtld_lock_lock_recursive (GL(dl_load_lock));
-
   /* One less direct use.  */
-  assert (map->l_direct_opencount > 0);
   --map->l_direct_opencount;
 
-  /* Decrement the reference count.  */
-  if (map->l_opencount > 1 || map->l_type != lt_loaded)
+  /* If _dl_close is called recursively (some destructor call dlclose),
+     just record that the parent _dl_close will need to do garbage collection
+     again and return.  */
+  static enum { not_pending, pending, rerun } dl_close_state;
+
+  if (map->l_direct_opencount > 0 || map->l_type != lt_loaded
+      || dl_close_state != not_pending)
     {
+      if (map->l_direct_opencount == 0 && map->l_type == lt_loaded)
+	dl_close_state = rerun;
+
       /* There are still references to this object.  Do nothing more.  */
       if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
-	GLRO(dl_debug_printf) ("\nclosing file=%s; opencount == %u\n",
-				map->l_name, map->l_opencount);
+	_dl_debug_printf ("\nclosing file=%s; direct_opencount=%u\n",
+			  map->l_name, map->l_direct_opencount);
 
-      /* Decrement the object's reference counter, not the dependencies'.  */
-      --map->l_opencount;
-
-      /* If the direct use counter reaches zero we have to decrement
-	 all the dependencies' usage counter.  */
-      if (map->l_direct_opencount == 0)
-	for (i = 1; i < map->l_searchlist.r_nlist; ++i)
-	  --map->l_searchlist.r_list[i]->l_opencount;
-
-      __rtld_lock_unlock_recursive (GL(dl_load_lock));
       return;
     }
 
-  list = map->l_initfini;
-
-  /* Compute the new l_opencount values.  */
-  i = map->l_searchlist.r_nlist;
-  if (__builtin_expect (i == 0, 0))
-    /* This can happen if we handle relocation dependencies for an
-       object which wasn't loaded directly.  */
-    for (i = 1; list[i] != NULL; ++i)
-      ;
+  Lmid_t nsid = map->l_ns;
+  struct link_namespaces *ns = &GL(dl_ns)[nsid];
 
-  unsigned int nopencount = i;
-  new_opencount = (unsigned int *) alloca (i * sizeof (unsigned int));
+ retry:
+  dl_close_state = pending;
 
-  for (i = 0; list[i] != NULL; ++i)
+#ifdef USE_TLS
+  bool any_tls = false;
+#endif
+  const unsigned int nloaded = ns->_ns_nloaded;
+  char used[nloaded];
+  char done[nloaded];
+  struct link_map *maps[nloaded];
+
+  /* Run over the list and assign indexes to the link maps and enter
+     them into the MAPS array.  */
+  int idx = 0;
+  for (struct link_map *l = ns->_ns_loaded; l != NULL; l = l->l_next)
     {
-      list[i]->l_idx = i;
-      new_opencount[i] = list[i]->l_opencount;
+      l->l_idx = idx;
+      maps[idx] = l;
+      ++idx;
     }
-  --new_opencount[0];
-  for (i = 1; list[i] != NULL; ++i)
-    if ((list[i]->l_flags_1 & DF_1_NODELETE) == 0
-	/* Decrement counter.  */
-	&& (assert (new_opencount[i] > 0), --new_opencount[i] == 0))
-      {
-	void mark_removed (struct link_map *remmap)
-	  {
-	    /* Test whether this object was also loaded directly.  */
-	    if (remmap->l_searchlist.r_list != NULL
-		&& remmap->l_direct_opencount > 0)
-	      {
-		/* In this case we have to decrement all the dependencies of
-		   this object.  They are all in MAP's dependency list.  */
-		unsigned int j;
-		struct link_map **dep_list = remmap->l_searchlist.r_list;
-
-		for (j = 1; j < remmap->l_searchlist.r_nlist; ++j)
-		  if (! (dep_list[j]->l_flags_1 & DF_1_NODELETE)
-		      || ! dep_list[j]->l_init_called)
+  assert (idx == nloaded);
+
+  /* Prepare the bitmaps.  */
+  memset (used, '\0', sizeof (used));
+  memset (done, '\0', sizeof (done));
+
+  /* Keep track of the lowest index link map we have covered already.  */
+  int done_index = -1;
+  while (++done_index < nloaded)
+    {
+      struct link_map *l = maps[done_index];
+
+      if (done[done_index])
+	/* Already handled.  */
+	continue;
+
+      /* Check whether this object is still used.  */
+      if (l->l_type == lt_loaded
+	  && l->l_direct_opencount == 0
+	  && (l->l_flags_1 & DF_1_NODELETE) == 0
+	  && !used[done_index])
+	continue;
+
+      /* We need this object and we handle it now.  */
+      done[done_index] = 1;
+      used[done_index] = 1;
+      /* Signal the object is still needed.  */
+      l->l_idx = IDX_STILL_USED;
+
+      /* Mark all dependencies as used.  */
+      if (l->l_initfini != NULL)
+	{
+	  struct link_map **lp = &l->l_initfini[1];
+	  while (*lp != NULL)
+	    {
+	      if ((*lp)->l_idx != IDX_STILL_USED)
 		{
-		  assert (dep_list[j]->l_idx < map->l_searchlist.r_nlist);
-		  assert (new_opencount[dep_list[j]->l_idx] > 0);
-		  if (--new_opencount[dep_list[j]->l_idx] == 0)
+		  assert ((*lp)->l_idx >= 0 && (*lp)->l_idx < nloaded);
+
+		  if (!used[(*lp)->l_idx])
 		    {
-		      assert (dep_list[j]->l_type == lt_loaded);
-		      mark_removed (dep_list[j]);
+		      used[(*lp)->l_idx] = 1;
+		      if ((*lp)->l_idx - 1 < done_index)
+			done_index = (*lp)->l_idx - 1;
 		    }
 		}
-	      }
 
-	    if (remmap->l_reldeps != NULL)
+	      ++lp;
+	    }
+	}
+      /* And the same for relocation dependencies.  */
+      if (l->l_reldeps != NULL)
+	for (unsigned int j = 0; j < l->l_reldepsact; ++j)
+	  {
+	    struct link_map *jmap = l->l_reldeps[j];
+
+	    if (jmap->l_idx != IDX_STILL_USED)
 	      {
-		unsigned int j;
-		for (j = 0; j < remmap->l_reldepsact; ++j)
+		assert (jmap->l_idx >= 0 && jmap->l_idx < nloaded);
+
+		if (!used[jmap->l_idx])
 		  {
-		    struct link_map *depmap = remmap->l_reldeps[j];
-
-		    /* Find out whether this object is in our list.  */
-		    if (depmap->l_idx < nopencount
-			&& list[depmap->l_idx] == depmap)
-		      {
-			/* Yes, it is.  If is has a search list, make a
-			   recursive call to handle this.  */
-			if (depmap->l_searchlist.r_list != NULL)
-			  {
-			    assert (new_opencount[depmap->l_idx] > 0);
-			    if (--new_opencount[depmap->l_idx] == 0)
-			      {
-				/* This one is now gone, too.  */
-				assert (depmap->l_type == lt_loaded);
-				mark_removed (depmap);
-			      }
-			  }
-			else
-			  {
-			    /* Otherwise we have to handle the dependency
-			       deallocation here.  */
-			    unsigned int k;
-			    for (k = 0; depmap->l_initfini[k] != NULL; ++k)
-			      {
-				struct link_map *rl = depmap->l_initfini[k];
-
-				if (rl->l_idx < nopencount
-				    && list[rl->l_idx] == rl)
-				  {
-				    assert (new_opencount[rl->l_idx] > 0);
-				    if (--new_opencount[rl->l_idx] ==  0)
-				      {
-					/* Another module to remove.  */
-					assert (rl->l_type == lt_loaded);
-					mark_removed (rl);
-				      }
-				  }
-				else
-				  {
-				    assert (rl->l_opencount > 0);
-				    if (--rl->l_opencount == 0)
-				      mark_removed (rl);
-				  }
-			      }
-			  }
-		      }
+		    used[jmap->l_idx] = 1;
+		    if (jmap->l_idx - 1 < done_index)
+		      done_index = jmap->l_idx - 1;
 		  }
 	      }
 	  }
+    }
 
-	mark_removed (list[i]);
-      }
-  assert (new_opencount[0] == 0);
+  /* Sort the entries.  */
+  _dl_sort_fini (ns->_ns_loaded, maps, nloaded, used, nsid);
 
   /* Call all termination functions at once.  */
-  for (i = 0; list[i] != NULL; ++i)
+#ifdef SHARED
+  bool do_audit = GLRO(dl_naudit) > 0 && !ns->_ns_loaded->l_auditing;
+#endif
+  bool unload_any = false;
+  bool scope_mem_left = false;
+  unsigned int unload_global = 0;
+  unsigned int first_loaded = ~0;
+  for (unsigned int i = 0; i < nloaded; ++i)
     {
-      struct link_map *imap = list[i];
-      if (new_opencount[i] == 0 && imap->l_type == lt_loaded
-	  && (imap->l_flags_1 & DF_1_NODELETE) == 0)
+      struct link_map *imap = maps[i];
+
+      /* All elements must be in the same namespace.  */
+      assert (imap->l_ns == nsid);
+
+      if (!used[i])
 	{
-	  /* When debugging print a message first.  */
-	  if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0))
-	    GLRO(dl_debug_printf) ("\ncalling fini: %s [%lu]\n\n",
-				   imap->l_name, imap->l_ns);
+	  assert (imap->l_type == lt_loaded
+		  && (imap->l_flags_1 & DF_1_NODELETE) == 0);
 
 	  /* Call its termination function.  Do not do it for
 	     half-cooked objects.  */
 	  if (imap->l_init_called)
 	    {
+	      /* When debugging print a message first.  */
+	      if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_IMPCALLS,
+				    0))
+		_dl_debug_printf ("\ncalling fini: %s [%lu]\n\n",
+				  imap->l_name, nsid);
+
 	      if (imap->l_info[DT_FINI_ARRAY] != NULL)
 		{
 		  ElfW(Addr) *array =
@@ -299,75 +277,235 @@ _dl_close (void *_map)
 			 + imap->l_info[DT_FINI]->d_un.d_ptr))) ();
 	    }
 
-	  /* This object must not be used anymore.  We must remove the
-	     reference from the scope.  */
-	  unsigned int j;
-	  struct link_map **searchlist = map->l_searchlist.r_list;
-	  unsigned int nsearchlist = map->l_searchlist.r_nlist;
+#ifdef SHARED
+	  /* Auditing checkpoint: we have a new object.  */
+	  if (__builtin_expect (do_audit, 0))
+	    {
+	      struct audit_ifaces *afct = GLRO(dl_audit);
+	      for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+		{
+		  if (afct->objclose != NULL)
+		    /* Return value is ignored.  */
+		    (void) afct->objclose (&imap->l_audit[cnt].cookie);
 
-#ifndef NDEBUG
-	  bool found = false;
+		  afct = afct->next;
+		}
+	    }
 #endif
-	  for (j = 0; j < nsearchlist; ++j)
-	    if (imap == searchlist[j])
-	      {
-		/* This is the object to remove.  Copy all the
-		   following ones.  */
-		while (++j < nsearchlist)
-		  searchlist[j - 1] = searchlist[j];
 
-		searchlist[j - 1] = NULL;
+	  /* This object must not be used anymore.  */
+	  imap->l_removed = 1;
 
-		--map->l_searchlist.r_nlist;
+	  /* We indeed have an object to remove.  */
+	  unload_any = true;
 
-#ifndef NDEBUG
-		found = true;
-#endif
-		break;
-	      }
-	  assert (found);
+	  if (imap->l_global)
+	    ++unload_global;
+
+	  /* Remember where the first dynamically loaded object is.  */
+	  if (i < first_loaded)
+	    first_loaded = i;
 	}
-      else if (new_opencount[i] != 0 && imap->l_type == lt_loaded
-	       && imap->l_searchlist.r_list == NULL
-	       && imap->l_initfini != NULL)
+      /* Else used[i].  */
+      else if (imap->l_type == lt_loaded)
 	{
-	  /* The object is still used.  But the object we are
-	     unloading right now is responsible for loading it.  If
-	     the current object does not have it's own scope yet we
-	     have to create one.  This has to be done before running
-	     the finalizers.
-
-	     To do this count the number of dependencies.  */
-	  unsigned int cnt;
-	  for (cnt = 1; imap->l_initfini[cnt] != NULL; ++cnt)
-	    if (imap->l_initfini[cnt]->l_idx >= i
-		&& imap->l_initfini[cnt]->l_idx < nopencount)
-	      ++new_opencount[imap->l_initfini[cnt]->l_idx];
-	    else
-	      ++imap->l_initfini[cnt]->l_opencount;
+	  struct r_scope_elem *new_list = NULL;
 
-	  /* We simply reuse the l_initfini list.  */
-	  imap->l_searchlist.r_list = &imap->l_initfini[cnt + 1];
-	  imap->l_searchlist.r_nlist = cnt;
+	  if (imap->l_searchlist.r_list == NULL && imap->l_initfini != NULL)
+	    {
+	      /* The object is still used.  But one of the objects we are
+		 unloading right now is responsible for loading it.  If
+		 the current object does not have it's own scope yet we
+		 have to create one.  This has to be done before running
+		 the finalizers.
+
+		 To do this count the number of dependencies.  */
+	      unsigned int cnt;
+	      for (cnt = 1; imap->l_initfini[cnt] != NULL; ++cnt)
+		;
+
+	      /* We simply reuse the l_initfini list.  */
+	      imap->l_searchlist.r_list = &imap->l_initfini[cnt + 1];
+	      imap->l_searchlist.r_nlist = cnt;
+
+	      new_list = &imap->l_searchlist;
+	    }
 
-	  for (cnt = 0; imap->l_scope[cnt] != NULL; ++cnt)
-	    if (imap->l_scope[cnt] == &map->l_searchlist)
+	  /* Count the number of scopes which remain after the unload.
+	     When we add the local search list count it.  Always add
+	     one for the terminating NULL pointer.  */
+	  size_t remain = (new_list != NULL) + 1;
+	  bool removed_any = false;
+	  for (size_t cnt = 0; imap->l_scope[cnt] != NULL; ++cnt)
+	    /* This relies on l_scope[] entries being always set either
+	       to its own l_symbolic_searchlist address, or some map's
+	       l_searchlist address.  */
+	    if (imap->l_scope[cnt] != &imap->l_symbolic_searchlist)
 	      {
-		imap->l_scope[cnt] = &imap->l_searchlist;
-		break;
+		struct link_map *tmap = (struct link_map *)
+		  ((char *) imap->l_scope[cnt]
+		   - offsetof (struct link_map, l_searchlist));
+		assert (tmap->l_ns == nsid);
+		if (tmap->l_idx == IDX_STILL_USED)
+		  ++remain;
+		else
+		  removed_any = true;
 	      }
+	    else
+	      ++remain;
+
+	  if (removed_any)
+	    {
+	      /* Always allocate a new array for the scope.  This is
+		 necessary since we must be able to determine the last
+		 user of the current array.  If possible use the link map's
+		 memory.  */
+	      size_t new_size;
+	      struct r_scope_elem **newp;
+
+#define SCOPE_ELEMS(imap) \
+  (sizeof (imap->l_scope_mem) / sizeof (imap->l_scope_mem[0]))
+
+	      if (imap->l_scope != imap->l_scope_mem
+		  && remain < SCOPE_ELEMS (imap))
+		{
+		  new_size = SCOPE_ELEMS (imap);
+		  newp = imap->l_scope_mem;
+		}
+	      else
+		{
+		  new_size = imap->l_scope_max;
+		  newp = (struct r_scope_elem **)
+		    malloc (new_size * sizeof (struct r_scope_elem *));
+		  if (newp == NULL)
+		    _dl_signal_error (ENOMEM, "dlclose", NULL,
+				      N_("cannot create scope list"));
+		}
+
+	      /* Copy over the remaining scope elements.  */
+	      remain = 0;
+	      for (size_t cnt = 0; imap->l_scope[cnt] != NULL; ++cnt)
+		{
+		  if (imap->l_scope[cnt] != &imap->l_symbolic_searchlist)
+		    {
+		      struct link_map *tmap = (struct link_map *)
+			((char *) imap->l_scope[cnt]
+			 - offsetof (struct link_map, l_searchlist));
+		      if (tmap->l_idx != IDX_STILL_USED)
+			{
+			  /* Remove the scope.  Or replace with own map's
+			     scope.  */
+			  if (new_list != NULL)
+			    {
+			      newp[remain++] = new_list;
+			      new_list = NULL;
+			    }
+			  continue;
+			}
+		    }
+
+		  newp[remain++] = imap->l_scope[cnt];
+		}
+	      newp[remain] = NULL;
+
+	      struct r_scope_elem **old = imap->l_scope;
+
+	      imap->l_scope = newp;
+
+	      /* No user anymore, we can free it now.  */
+	      if (old != imap->l_scope_mem)
+		{
+		  if (_dl_scope_free (old))
+		    /* If _dl_scope_free used THREAD_GSCOPE_WAIT (),
+		       no need to repeat it.  */
+		    scope_mem_left = false;
+		}
+	      else
+		scope_mem_left = true;
+
+	      imap->l_scope_max = new_size;
+	    }
+
+	  /* The loader is gone, so mark the object as not having one.
+	     Note: l_idx != IDX_STILL_USED -> object will be removed.  */
+	  if (imap->l_loader != NULL
+	      && imap->l_loader->l_idx != IDX_STILL_USED)
+	    imap->l_loader = NULL;
+
+	  /* Remember where the first dynamically loaded object is.  */
+	  if (i < first_loaded)
+	    first_loaded = i;
 	}
+    }
+
+  /* If there are no objects to unload, do nothing further.  */
+  if (!unload_any)
+    goto out;
 
-      /* Store the new l_opencount value.  */
-      imap->l_opencount = new_opencount[i];
+#ifdef SHARED
+  /* Auditing checkpoint: we will start deleting objects.  */
+  if (__builtin_expect (do_audit, 0))
+    {
+      struct link_map *head = ns->_ns_loaded;
+      struct audit_ifaces *afct = GLRO(dl_audit);
+      /* Do not call the functions for any auditing object.  */
+      if (head->l_auditing == 0)
+	{
+	  for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+	    {
+	      if (afct->activity != NULL)
+		afct->activity (&head->l_audit[cnt].cookie, LA_ACT_DELETE);
 
-      /* Just a sanity check.  */
-      assert (imap->l_type == lt_loaded || imap->l_opencount > 0);
+	      afct = afct->next;
+	    }
+	}
     }
+#endif
 
   /* Notify the debugger we are about to remove some loaded objects.  */
-  _r_debug.r_state = RT_DELETE;
-  GLRO(dl_debug_state) ();
+  struct r_debug *r = _dl_debug_initialize (0, nsid);
+  r->r_state = RT_DELETE;
+  _dl_debug_state ();
+
+  if (unload_global)
+    {
+      /* Some objects are in the global scope list.  Remove them.  */
+      struct r_scope_elem *ns_msl = ns->_ns_main_searchlist;
+      unsigned int i;
+      unsigned int j = 0;
+      unsigned int cnt = ns_msl->r_nlist;
+
+      while (cnt > 0 && ns_msl->r_list[cnt - 1]->l_removed)
+	--cnt;
+
+      if (cnt + unload_global == ns_msl->r_nlist)
+	/* Speed up removing most recently added objects.  */
+	j = cnt;
+      else
+	for (i = 0; i < cnt; i++)
+	  if (ns_msl->r_list[i]->l_removed == 0)
+	    {
+	      if (i != j)
+		ns_msl->r_list[j] = ns_msl->r_list[i];
+	      j++;
+	    }
+      ns_msl->r_nlist = j;
+    }
+
+  if (!RTLD_SINGLE_THREAD_P
+      && (unload_global
+	  || scope_mem_left
+	  || (GL(dl_scope_free_list) != NULL
+	      && GL(dl_scope_free_list)->count)))
+    {
+      struct dl_scope_free_list *fsl;
+
+      THREAD_GSCOPE_WAIT ();
+      /* Now we can free any queued old scopes.  */
+      if ((fsl = GL(dl_scope_free_list)) != NULL)
+	while (fsl->count > 0)
+	  free (fsl->list[--fsl->count]);
+    }
 
 #ifdef USE_TLS
   size_t tls_free_start;
@@ -377,34 +515,15 @@ _dl_close (void *_map)
 
   /* Check each element of the search list to see if all references to
      it are gone.  */
-  for (i = 0; list[i] != NULL; ++i)
+  for (unsigned int i = first_loaded; i < nloaded; ++i)
     {
-      struct link_map *imap = list[i];
-      if (imap->l_opencount == 0 && imap->l_type == lt_loaded)
+      struct link_map *imap = maps[i];
+      if (!used[i])
 	{
-	  struct libname_list *lnp;
+	  assert (imap->l_type == lt_loaded);
 
 	  /* That was the last reference, and this was a dlopen-loaded
 	     object.  We can unmap it.  */
-	  if (__builtin_expect (imap->l_global, 0))
-	    {
-	      /* This object is in the global scope list.  Remove it.  */
-	      unsigned int cnt
-		= GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_nlist;
-
-	      do
-		--cnt;
-	      while (GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_list[cnt]
-		     != imap);
-
-	      /* The object was already correctly registered.  */
-	      while (++cnt
-		     < GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_nlist)
-		GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_list[cnt - 1]
-		  = GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_list[cnt];
-
-	      --GL(dl_ns)[imap->l_ns]._ns_main_searchlist->r_nlist;
-	    }
 
 #ifdef USE_TLS
 	  /* Remove the object from the dtv slotinfo array if it uses TLS.  */
@@ -412,9 +531,10 @@ _dl_close (void *_map)
 	    {
 	      any_tls = true;
 
-	      if (! remove_slotinfo (imap->l_tls_modid,
-				     GL(dl_tls_dtv_slotinfo_list), 0,
-				     imap->l_init_called))
+	      if (GL(dl_tls_dtv_slotinfo_list) != NULL
+		  && ! remove_slotinfo (imap->l_tls_modid,
+					GL(dl_tls_dtv_slotinfo_list), 0,
+					imap->l_init_called))
 		/* All dynamically loaded modules with TLS are unloaded.  */
 		GL(dl_tls_max_dtv_idx) = GL(dl_tls_static_nelem);
 
@@ -499,12 +619,12 @@ _dl_close (void *_map)
 	  else
 	    {
 #ifdef SHARED
-	      assert (imap->l_ns != LM_ID_BASE);
+	      assert (nsid != LM_ID_BASE);
 #endif
-	      GL(dl_ns)[imap->l_ns]._ns_loaded = imap->l_next;
+	      ns->_ns_loaded = imap->l_next;
 	    }
 
-	  --GL(dl_ns)[imap->l_ns]._ns_nloaded;
+	  --ns->_ns_nloaded;
 	  if (imap->l_next != NULL)
 	    imap->l_next->l_prev = imap->l_prev;
 
@@ -512,39 +632,18 @@ _dl_close (void *_map)
 	  if (imap->l_origin != (char *) -1)
 	    free ((char *) imap->l_origin);
 
-	  /* If the object has relocation dependencies save this
-             information for latter.  */
-	  if (__builtin_expect (imap->l_reldeps != NULL, 0))
-	    {
-	      struct reldep_list *newrel;
-
-	      newrel = (struct reldep_list *) alloca (sizeof (*reldeps)
-						      + (imap->l_reldepsact
-							 * sizeof (bool)));
-	      newrel->rellist = imap->l_reldeps;
-	      newrel->nrellist = imap->l_reldepsact;
-	      newrel->next = reldeps;
-
-	      newrel->nhandled = imap->l_reldepsact;
-	      unsigned int j;
-	      for (j = 0; j < imap->l_reldepsact; ++j)
-		{
-		  /* Find out whether this object is in our list.  */
-		  if (imap->l_reldeps[j]->l_idx < nopencount
-		      && list[imap->l_reldeps[j]->l_idx] == imap->l_reldeps[j])
-		    /* Yes, it is.  */
-		    newrel->handled[j] = true;
-		  else
-		    newrel->handled[j] = false;
-		}
+	  free (imap->l_reldeps);
 
-	      reldeps = newrel;
-	    }
+	  /* Print debugging message.  */
+	  if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
+	    _dl_debug_printf ("\nfile=%s [%lu];  destroying link map\n",
+			      imap->l_name, imap->l_ns);
 
 	  /* This name always is allocated.  */
 	  free (imap->l_name);
 	  /* Remove the list with all the names of the shared object.  */
-	  lnp = imap->l_libname;
+
+	  struct libname_list *lnp = imap->l_libname;
 	  do
 	    {
 	      struct libname_list *this = lnp;
@@ -555,8 +654,7 @@ _dl_close (void *_map)
 	  while (lnp != NULL);
 
 	  /* Remove the searchlists.  */
-	  if (imap != map)
-	    free (imap->l_initfini);
+	  free (imap->l_initfini);
 
 	  /* Remove the scope array if we allocated it.  */
 	  if (imap->l_scope != imap->l_scope_mem)
@@ -579,40 +677,69 @@ _dl_close (void *_map)
   if (any_tls)
     {
       if (__builtin_expect (++GL(dl_tls_generation) == 0, 0))
-	__libc_fatal (_("TLS generation counter wrapped!  Please report as described in <http://www.gnu.org/software/libc/bugs.html>."));
+	_dl_fatal_printf ("TLS generation counter wrapped!  Please report as described in <http://www.gnu.org/software/libc/bugs.html>.\n");
 
       if (tls_free_end == GL(dl_tls_static_used))
 	GL(dl_tls_static_used) = tls_free_start;
     }
 #endif
 
+#ifdef SHARED
+  /* Auditing checkpoint: we have deleted all objects.  */
+  if (__builtin_expect (do_audit, 0))
+    {
+      struct link_map *head = ns->_ns_loaded;
+      /* Do not call the functions for any auditing object.  */
+      if (head->l_auditing == 0)
+	{
+	  struct audit_ifaces *afct = GLRO(dl_audit);
+	  for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+	    {
+	      if (afct->activity != NULL)
+		afct->activity (&head->l_audit[cnt].cookie, LA_ACT_CONSISTENT);
+
+	      afct = afct->next;
+	    }
+	}
+    }
+#endif
+
   /* Notify the debugger those objects are finalized and gone.  */
-  _r_debug.r_state = RT_CONSISTENT;
-  GLRO(dl_debug_state) ();
+  r->r_state = RT_CONSISTENT;
+  _dl_debug_state ();
 
-  /* Now we can perhaps also remove the modules for which we had
-     dependencies because of symbol lookup.  */
-  while (__builtin_expect (reldeps != NULL, 0))
-    {
-      while (reldeps->nrellist-- > 0)
-	/* Some of the relocation dependencies might be on the
-	   dependency list of the object we are closing right now.
-	   They were already handled.  Do not close them again.  */
-	if (reldeps->nrellist < reldeps->nhandled
-	    && ! reldeps->handled[reldeps->nrellist])
-	  _dl_close (reldeps->rellist[reldeps->nrellist]);
+  /* Recheck if we need to retry, release the lock.  */
+ out:
+  if (dl_close_state == rerun)
+    goto retry;
 
-      free (reldeps->rellist);
+  dl_close_state = not_pending;
+}
+
+
+void
+_dl_close (void *_map)
+{
+  struct link_map *map = _map;
 
-      reldeps = reldeps->next;
+  /* First see whether we can remove the object at all.  */
+  if (__builtin_expect (map->l_flags_1 & DF_1_NODELETE, 0))
+    {
+      assert (map->l_init_called);
+      /* Nope.  Do nothing.  */
+      return;
     }
 
-  free (list);
+  if (__builtin_expect (map->l_direct_opencount, 1) == 0)
+    GLRO(dl_signal_error) (0, map->l_name, NULL, N_("shared object not open"));
+
+  /* Acquire the lock.  */
+  __rtld_lock_lock_recursive (GL(dl_load_lock));
+
+  _dl_close_worker (map);
 
-  /* Release the lock.  */
   __rtld_lock_unlock_recursive (GL(dl_load_lock));
 }
-libc_hidden_def (_dl_close)
 
 
 #ifdef USE_TLS
@@ -647,22 +774,22 @@ free_slotinfo (struct dtv_slotinfo_list **elemp)
 
 libc_freeres_fn (free_mem)
 {
-  for (Lmid_t ns = 0; ns < DL_NNS; ++ns)
-    if (__builtin_expect (GL(dl_ns)[ns]._ns_global_scope_alloc, 0) != 0
-	&& (GL(dl_ns)[ns]._ns_main_searchlist->r_nlist
+  for (Lmid_t nsid = 0; nsid < DL_NNS; ++nsid)
+    if (__builtin_expect (GL(dl_ns)[nsid]._ns_global_scope_alloc, 0) != 0
+	&& (GL(dl_ns)[nsid]._ns_main_searchlist->r_nlist
 	    // XXX Check whether we need NS-specific initial_searchlist
 	    == GLRO(dl_initial_searchlist).r_nlist))
       {
 	/* All object dynamically loaded by the program are unloaded.  Free
 	   the memory allocated for the global scope variable.  */
-	struct link_map **old = GL(dl_ns)[ns]._ns_main_searchlist->r_list;
+	struct link_map **old = GL(dl_ns)[nsid]._ns_main_searchlist->r_list;
 
 	/* Put the old map in.  */
-	GL(dl_ns)[ns]._ns_main_searchlist->r_list
+	GL(dl_ns)[nsid]._ns_main_searchlist->r_list
 	  // XXX Check whether we need NS-specific initial_searchlist
 	  = GLRO(dl_initial_searchlist).r_list;
 	/* Signal that the original map is used.  */
-	GL(dl_ns)[ns]._ns_global_scope_alloc = 0;
+	GL(dl_ns)[nsid]._ns_global_scope_alloc = 0;
 
 	/* Now free the old map.  */
 	free (old);
@@ -680,10 +807,14 @@ libc_freeres_fn (free_mem)
 	free_slotinfo (&GL(dl_tls_dtv_slotinfo_list));
       else
 # endif
-        /* The first element of the list does not have to be deallocated.
+	/* The first element of the list does not have to be deallocated.
 	   It was allocated in the dynamic linker (i.e., with a different
 	   malloc), and in the static library it's in .bss space.  */
 	free_slotinfo (&GL(dl_tls_dtv_slotinfo_list)->next);
     }
 #endif
+
+  void *scope_free_list = GL(dl_scope_free_list);
+  GL(dl_scope_free_list) = NULL;
+  free (scope_free_list);
 }