2.5-18.1

1 files changed, 167 insertions, 104 deletions

diff --git a/elf/dl-fini.c b/elf/dl-fini.c
index f43f4a0..3cd7e7b 100644
--- a/elf/dl-fini.c
+++ b/elf/dl-fini.c
@@ -1,5 +1,5 @@
 /* Call the termination functions of loaded shared objects.
-   Copyright (C) 1995,96,1998-2002,2004 Free Software Foundation, Inc.
+   Copyright (C) 1995,96,1998-2002,2004, 2005 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
@@ -29,6 +29,94 @@ typedef void (*fini_t) (void);
 
 void
 internal_function
+_dl_sort_fini (struct link_map *l, struct link_map **maps, size_t nmaps,
+	       char *used, Lmid_t ns)
+{
+  if (ns == LM_ID_BASE)
+    /* The main executable always comes first.  */
+    l = l->l_next;
+
+  for (; l != NULL; l = l->l_next)
+    /* Do not handle ld.so in secondary namespaces and object which
+       are not removed.  */
+    if (l == l->l_real && l->l_idx != -1)
+      {
+	/* Find the place in the 'maps' array.  */
+	unsigned int j;
+	for (j = ns == LM_ID_BASE ? 1 : 0; maps[j] != l; ++j)
+	  assert (j < nmaps);
+
+	/* Find all object for which the current one is a dependency
+	   and move the found object (if necessary) in front.  */
+	for (unsigned int k = j + 1; k < nmaps; ++k)
+	  {
+	    struct link_map **runp = maps[k]->l_initfini;
+	    if (runp != NULL)
+	      {
+		while (*runp != NULL)
+		  if (*runp == l)
+		    {
+		      struct link_map *here = maps[k];
+
+		      /* Move it now.  */
+		      memmove (&maps[j] + 1,
+			       &maps[j], (k - j) * sizeof (struct link_map *));
+		      maps[j] = here;
+
+		      if (used != NULL)
+			{
+			  char here_used = used[k];
+
+			  memmove (&used[j] + 1,
+				   &used[j], (k - j) * sizeof (char));
+			  used[j] = here_used;
+			}
+
+		      ++j;
+
+		      break;
+		    }
+		  else
+		    ++runp;
+	      }
+
+	    if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
+	      {
+		unsigned int m = maps[k]->l_reldepsact;
+		struct link_map **relmaps = maps[k]->l_reldeps;
+
+		while (m-- > 0)
+		  {
+		    if (relmaps[m] == l)
+		      {
+			struct link_map *here = maps[k];
+
+			/* Move it now.  */
+			memmove (&maps[j] + 1,
+				 &maps[j],
+				 (k - j) * sizeof (struct link_map *));
+			maps[j] = here;
+
+			if (used != NULL)
+			  {
+			    char here_used = used[k];
+
+			    memmove (&used[j] + 1,
+				     &used[j], (k - j) * sizeof (char));
+			    used[j] = here_used;
+			  }
+
+			break;
+		      }
+		  }
+	      }
+	  }
+      }
+}
+
+
+void
+internal_function
 _dl_fini (void)
 {
   /* Lots of fun ahead.  We have to call the destructors for all still
@@ -48,16 +136,29 @@ _dl_fini (void)
   /* We run the destructors of the main namespaces last.  As for the
      other namespaces, we pick run the destructors in them in reverse
      order of the namespace ID.  */
-  for (Lmid_t cnt = DL_NNS - 1; cnt >= 0; --cnt)
+#ifdef SHARED
+  int do_audit = 0;
+ again:
+#endif
+  for (Lmid_t ns = DL_NNS - 1; ns >= 0; --ns)
     {
       /* Protect against concurrent loads and unloads.  */
       __rtld_lock_lock_recursive (GL(dl_load_lock));
 
-      unsigned int nloaded = GL(dl_ns)[cnt]._ns_nloaded;
+      unsigned int nmaps = 0;
+      unsigned int nloaded = GL(dl_ns)[ns]._ns_nloaded;
+      /* No need to do anything for empty namespaces or those used for
+	 auditing DSOs.  */
+      if (nloaded == 0
+#ifdef SHARED
+	  || GL(dl_ns)[ns]._ns_loaded->l_auditing != do_audit
+#endif
+	  )
+	goto out;
 
       /* XXX Could it be (in static binaries) that there is no object
 	 loaded?  */
-      assert (cnt != LM_ID_BASE || nloaded > 0);
+      assert (ns != LM_ID_BASE || nloaded > 0);
 
       /* Now we can allocate an array to hold all the pointers and copy
 	 the pointers in.  */
@@ -76,86 +177,28 @@ _dl_fini (void)
 
       unsigned int i;
       struct link_map *l;
-      for (l = GL(dl_ns)[cnt]._ns_loaded, i = 0; l != NULL; l = l->l_next)
+      assert (nloaded != 0 || GL(dl_ns)[ns]._ns_loaded == NULL);
+      for (l = GL(dl_ns)[ns]._ns_loaded, i = 0; l != NULL; l = l->l_next)
 	/* Do not handle ld.so in secondary namespaces.  */
 	if (l == l->l_real)
 	  {
 	    assert (i < nloaded);
 
-	    maps[i++] = l;
+	    maps[i] = l;
+	    l->l_idx = i;
+	    ++i;
 
-	    /* Bump l_opencount of all objects so that they are not
-	       dlclose()ed from underneath us.  */
-	    ++l->l_opencount;
+	    /* Bump l_direct_opencount of all objects so that they are
+	       not dlclose()ed from underneath us.  */
+	    ++l->l_direct_opencount;
 	  }
-      assert (cnt != LM_ID_BASE || i == nloaded);
-      assert (cnt == LM_ID_BASE || i == nloaded || i == nloaded - 1);
-      unsigned int nmaps = i;
+      assert (ns != LM_ID_BASE || i == nloaded);
+      assert (ns == LM_ID_BASE || i == nloaded || i == nloaded - 1);
+      nmaps = i;
 
       if (nmaps != 0)
-	{
-	  /* Now we have to do the sorting.  */
-	  l = GL(dl_ns)[cnt]._ns_loaded;
-	  if (cnt == LM_ID_BASE)
-	    /* The main executable always comes first.  */
-	    l = l->l_next;
-	  for (; l != NULL; l = l->l_next)
-	    /* Do not handle ld.so in secondary namespaces.  */
-	    if (l == l->l_real)
-	      {
-		/* Find the place in the 'maps' array.  */
-		unsigned int j;
-		for (j = cnt == LM_ID_BASE ? 1 : 0; maps[j] != l; ++j)
-		  assert (j < nmaps);
-
-		/* Find all object for which the current one is a dependency
-		   and move the found object (if necessary) in front.  */
-		for (unsigned int k = j + 1; k < nmaps; ++k)
-		  {
-		    struct link_map **runp = maps[k]->l_initfini;
-		    if (runp != NULL)
-		      {
-			while (*runp != NULL)
-			  if (*runp == l)
-			    {
-			      struct link_map *here = maps[k];
-
-			      /* Move it now.  */
-			      memmove (&maps[j] + 1,
-				       &maps[j],
-				       (k - j) * sizeof (struct link_map *));
-			      maps[j++] = here;
-
-			      break;
-			    }
-			  else
-			    ++runp;
-		      }
-
-		    if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
-		      {
-			unsigned int m = maps[k]->l_reldepsact;
-			struct link_map **relmaps = maps[k]->l_reldeps;
-
-			while (m-- > 0)
-			  {
-			    if (relmaps[m] == l)
-			      {
-				struct link_map *here = maps[k];
-
-				/* Move it now.  */
-				memmove (&maps[j] + 1,
-					 &maps[j],
-					 (k - j) * sizeof (struct link_map *));
-				maps[j] = here;
-
-				break;
-			      }
-			  }
-		      }
-		  }
-	      }
-	}
+	/* Now we have to do the sorting.  */
+	_dl_sort_fini (GL(dl_ns)[ns]._ns_loaded, maps, nmaps, NULL, ns);
 
       /* We do not rely on the linked list of loaded object anymore from
 	 this point on.  We have our own list here (maps).  The various
@@ -163,6 +206,7 @@ _dl_fini (void)
 	 high and will be decremented in this loop.  So we release the
 	 lock so that some code which might be called from a destructor
 	 can directly or indirectly access the lock.  */
+    out:
       __rtld_lock_unlock_recursive (GL(dl_load_lock));
 
       /* 'maps' now contains the objects in the right order.  Now call the
@@ -176,49 +220,68 @@ _dl_fini (void)
 	      /* Make sure nothing happens if we are called twice.  */
 	      l->l_init_called = 0;
 
-	      /* Don't call the destructors for objects we are not
-		 supposed to.  */
-	      if (l->l_name[0] == '\0' && l->l_type == lt_executable)
-		continue;
-
 	      /* Is there a destructor function?  */
-	      if (l->l_info[DT_FINI_ARRAY] == NULL
-		  && l->l_info[DT_FINI] == NULL)
-		continue;
-
-	      /* 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",
-				  l->l_name[0] ? l->l_name : rtld_progname,
-				  cnt);
-
-	      /* First see whether an array is given.  */
-	      if (l->l_info[DT_FINI_ARRAY] != NULL)
+	      if (l->l_info[DT_FINI_ARRAY] != NULL
+		  || l->l_info[DT_FINI] != NULL)
 		{
-		  ElfW(Addr) *array =
-		    (ElfW(Addr) *) (l->l_addr
-				    + l->l_info[DT_FINI_ARRAY]->d_un.d_ptr);
-		  unsigned int i = (l->l_info[DT_FINI_ARRAYSZ]->d_un.d_val
-				    / sizeof (ElfW(Addr)));
-		  while (i-- > 0)
-		    ((fini_t) array[i]) ();
+		  /* 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",
+				      l->l_name[0] ? l->l_name : rtld_progname,
+				      ns);
+
+		  /* First see whether an array is given.  */
+		  if (l->l_info[DT_FINI_ARRAY] != NULL)
+		    {
+		      ElfW(Addr) *array =
+			(ElfW(Addr) *) (l->l_addr
+					+ l->l_info[DT_FINI_ARRAY]->d_un.d_ptr);
+		      unsigned int i = (l->l_info[DT_FINI_ARRAYSZ]->d_un.d_val
+					/ sizeof (ElfW(Addr)));
+		      while (i-- > 0)
+			((fini_t) array[i]) ();
+		    }
+
+		  /* Next try the old-style destructor.  */
+		  if (l->l_info[DT_FINI] != NULL)
+		    ((fini_t) DL_DT_FINI_ADDRESS (l, l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) ();
 		}
 
-	      /* Next try the old-style destructor.  */
-	      if (l->l_info[DT_FINI] != NULL)
-		((fini_t) DL_DT_FINI_ADDRESS (l, l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) ();
+#ifdef SHARED
+	      /* Auditing checkpoint: another object closed.  */
+	      if (!do_audit && __builtin_expect (GLRO(dl_naudit) > 0, 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 (&l->l_audit[cnt].cookie);
+
+		      afct = afct->next;
+		    }
+		}
+#endif
 	    }
 
 	  /* Correct the previous increment.  */
-	  --l->l_opencount;
+	  --l->l_direct_opencount;
 	}
     }
 
+#ifdef SHARED
+  if (! do_audit && GLRO(dl_naudit) > 0)
+    {
+      do_audit = 1;
+      goto again;
+    }
+
   if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_STATISTICS, 0))
     _dl_debug_printf ("\nruntime linker statistics:\n"
 		      "           final number of relocations: %lu\n"
 		      "final number of relocations from cache: %lu\n",
 		      GL(dl_num_relocations),
 		      GL(dl_num_cache_relocations));
+#endif
 }