Blame SOURCES/glibc-rh782585.patch

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diff -rup a/elf/dl-close.c b/elf/dl-close.c
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--- a/elf/dl-close.c	2012-01-19 12:59:42.759484350 -0700
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+++ b/elf/dl-close.c	2012-01-19 14:10:20.439263806 -0700
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@@ -223,7 +223,7 @@ _dl_close_worker (struct link_map *map)
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     }
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   /* Sort the entries.  */
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-  _dl_sort_fini (ns->_ns_loaded, maps, nloaded, used, nsid);
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+  _dl_sort_fini (maps, nloaded, used, nsid);
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   /* Call all termination functions at once.  */
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 #ifdef SHARED
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diff -rup a/elf/dl-deps.c b/elf/dl-deps.c
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--- a/elf/dl-deps.c	2012-01-19 12:59:42.716484301 -0700
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+++ b/elf/dl-deps.c	2012-01-19 13:52:35.223720556 -0700
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@@ -614,51 +614,67 @@ Filters not supported with LD_TRACE_PREL
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 	map->l_searchlist.r_list[i]->l_reserved = 0;
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     }
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-  /* Now determine the order in which the initialization has to happen.  */
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+  /* Sort the initializer list to take dependencies into account.  The binary
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+     itself will always be initialize last.  */
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   memcpy (l_initfini, map->l_searchlist.r_list,
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 	  nlist * sizeof (struct link_map *));
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-  /* We can skip looking for the binary itself which is at the front
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-     of the search list.  Look through the list backward so that circular
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-     dependencies are not changing the order.  */
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-  for (i = 1; i < nlist; ++i)
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+  if (__builtin_expect (nlist > 1, 1))
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     {
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-      struct link_map *l = map->l_searchlist.r_list[i];
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-      unsigned int j;
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-      unsigned int k;
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-
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-      /* Find the place in the initfini list where the map is currently
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-	 located.  */
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-      for (j = 1; l_initfini[j] != l; ++j)
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-	;
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-
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-      /* Find all object for which the current one is a dependency and
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-	 move the found object (if necessary) in front.  */
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-      for (k = j + 1; k < nlist; ++k)
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+      /* We can skip looking for the binary itself which is at the front
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+	 of the search list.  */
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+      i = 1;
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+      unsigned int seen[nlist];
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+      memset (seen, 0, nlist * sizeof (seen[0]));
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+      while (1)
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 	{
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-	  struct link_map **runp;
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-
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-	  runp = l_initfini[k]->l_initfini;
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-	  if (runp != NULL)
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+	  /* Keep track of which object we looked at this round.  */
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+	  ++seen[i];
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+	  struct link_map *thisp = l_initfini[i];
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+
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+	  /* Find the last object in the list for which the current one is
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+	     a dependency and move the current object behind the object
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+	     with the dependency.  */
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+	  unsigned int k = nlist - 1;
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+	  while (k > i)
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 	    {
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-	      while (*runp != NULL)
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-		if (__builtin_expect (*runp++ == l, 0))
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-		  {
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-		    struct link_map *here = l_initfini[k];
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-
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-		    /* Move it now.  */
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-		    memmove (&l_initfini[j] + 1, &l_initfini[j],
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-			     (k - j) * sizeof (struct link_map *));
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-		    l_initfini[j] = here;
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-
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-		    /* Don't insert further matches before the last
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-		       entry moved to the front.  */
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-		    ++j;
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+	      struct link_map **runp = l_initfini[k]->l_initfini;
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+	      if (runp != NULL)
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+		/* Look through the dependencies of the object.  */
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+		while (*runp != NULL)
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+		  if (__builtin_expect (*runp++ == thisp, 0))
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+		    {
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+		      /* Move the current object to the back past the last
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+			 object with it as the dependency.  */
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+		      memmove (&l_initfini[i], &l_initfini[i + 1],
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+			       (k - i) * sizeof (l_initfini[0]));
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+		      l_initfini[k] = thisp;
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+
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+		      if (seen[i + 1] > nlist - i - 2)
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+			{
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+			  ++i;
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+			  goto next_clear;
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+			}
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+
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+		      unsigned int this_seen = seen[i];
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+		      memmove (&seen[i], &seen[i + 1],
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+			       (k - i) * sizeof (seen[0]));
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+		      seen[k] = this_seen;
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+
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+		      goto next;
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+		    }
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-		    break;
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-		  }
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+	      --k;
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 	    }
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+
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+	  if (++i == nlist)
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+	    break;
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+	next_clear:
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+	  memset (&seen[i], 0, (nlist - i) * sizeof (seen[0]));
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+
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+	next:;
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 	}
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     }
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+
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   /* Terminate the list of dependencies.  */
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   l_initfini[nlist] = NULL;
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   atomic_write_barrier ();
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diff -rup a/elf/dl-fini.c b/elf/dl-fini.c
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--- a/elf/dl-fini.c	2010-05-04 05:27:23.000000000 -0600
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+++ b/elf/dl-fini.c	2012-01-19 13:56:38.653842046 -0700
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@@ -1,5 +1,6 @@
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 /* Call the termination functions of loaded shared objects.
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-   Copyright (C) 1995,96,1998-2002,2004-2005,2009 Free Software Foundation, Inc.
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+   Copyright (C) 1995,96,1998-2002,2004-2005,2009,2011
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+   Free Software Foundation, Inc.
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    This file is part of the GNU C Library.
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    The GNU C Library is free software; you can redistribute it and/or
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@@ -29,89 +30,100 @@ typedef void (*fini_t) (void);
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 void
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 internal_function
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-_dl_sort_fini (struct link_map *l, struct link_map **maps, size_t nmaps,
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-	       char *used, Lmid_t ns)
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+_dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
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 {
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-  if (ns == LM_ID_BASE)
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-    /* The main executable always comes first.  */
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-    l = l->l_next;
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-
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-  for (; l != NULL; l = l->l_next)
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-    /* Do not handle ld.so in secondary namespaces and object which
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-       are not removed.  */
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-    if (l == l->l_real && l->l_idx != -1)
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-      {
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-	/* Find the place in the 'maps' array.  */
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-	unsigned int j;
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-	for (j = ns == LM_ID_BASE ? 1 : 0; maps[j] != l; ++j)
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-	  assert (j < nmaps);
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-
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-	/* Find all object for which the current one is a dependency
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-	   and move the found object (if necessary) in front.  */
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-	for (unsigned int k = j + 1; k < nmaps; ++k)
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-	  {
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-	    struct link_map **runp = maps[k]->l_initfini;
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-	    if (runp != NULL)
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-	      {
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-		while (*runp != NULL)
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-		  if (*runp == l)
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-		    {
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-		      struct link_map *here = maps[k];
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+  /* A list of one element need not be sorted.  */
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+  if (nmaps == 1)
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+    return;
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+
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+  /* We can skip looking for the binary itself which is at the front
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+     of the search list for the main namespace.  */
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+  unsigned int i = ns == LM_ID_BASE;
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+  unsigned int seen[nmaps];
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+  memset (seen, 0, nmaps * sizeof (seen[0]));
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+  while (1)
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+    {
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+      /* Keep track of which object we looked at this round.  */
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+      ++seen[i];
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+      struct link_map *thisp = maps[i];
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+
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+      /* Do not handle ld.so in secondary namespaces and object which
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+	 are not removed.  */
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+      if (thisp != thisp->l_real || thisp->l_idx == -1)
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+	goto skip;
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+
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+      /* Find the last object in the list for which the current one is
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+	 a dependency and move the current object behind the object
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+	 with the dependency.  */
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+      unsigned int k = nmaps - 1;
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+      while (k > i)
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+	{
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+	  struct link_map **runp = maps[k]->l_initfini;
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+	  if (runp != NULL)
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+	    /* Look through the dependencies of the object.  */
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+	    while (*runp != NULL)
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+	      if (__builtin_expect (*runp++ == thisp, 0))
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+		{
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+		move:
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+		  /* Move the current object to the back past the last
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+		     object with it as the dependency.  */
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+		  memmove (&maps[i], &maps[i + 1],
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+			   (k - i) * sizeof (maps[0]));
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+		  maps[k] = thisp;
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-		      /* Move it now.  */
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-		      memmove (&maps[j] + 1,
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-			       &maps[j], (k - j) * sizeof (struct link_map *));
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-		      maps[j] = here;
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+		  if (used != NULL)
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+		    {
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+		      char here_used = used[i];
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+		      memmove (&used[i], &used[i + 1],
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+			       (k - i) * sizeof (used[0]));
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+		      used[k] = here_used;
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+		    }
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-		      if (used != NULL)
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-			{
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-			  char here_used = used[k];
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+		  if (seen[i + 1] > nmaps - i - 2)
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+		    {
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+		      ++i;
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+		      goto next_clear;
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+		    }
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-			  memmove (&used[j] + 1,
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-				   &used[j], (k - j) * sizeof (char));
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-			  used[j] = here_used;
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-			}
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+		  unsigned int this_seen = seen[i];
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+		  memmove (&seen[i], &seen[i + 1], (k - i) * sizeof (seen[0]));
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+		  seen[k] = this_seen;
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-		      ++j;
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+		  goto next;
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+		}
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-		      break;
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-		    }
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-		  else
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-		    ++runp;
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-	      }
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-
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-	    if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
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-	      {
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-		unsigned int m = maps[k]->l_reldeps->act;
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-		struct link_map **relmaps = &maps[k]->l_reldeps->list[0];
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+	  if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
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+	    {
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+	      unsigned int m = maps[k]->l_reldeps->act;
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+	      struct link_map **relmaps = &maps[k]->l_reldeps->list[0];
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-		while (m-- > 0)
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+	      /* Look through the relocation dependencies of the object.  */
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+	      while (m-- > 0)
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+		if (__builtin_expect (relmaps[m] == thisp, 0))
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 		  {
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-		    if (relmaps[m] == l)
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-		      {
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-			struct link_map *here = maps[k];
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-
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-			/* Move it now.  */
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-			memmove (&maps[j] + 1,
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-				 &maps[j],
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-				 (k - j) * sizeof (struct link_map *));
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-			maps[j] = here;
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-
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-			if (used != NULL)
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-			  {
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-			    char here_used = used[k];
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-
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-			    memmove (&used[j] + 1,
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-				     &used[j], (k - j) * sizeof (char));
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-			    used[j] = here_used;
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-			  }
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-
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-			break;
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-		      }
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+		    /* If a cycle exists with a link time dependency,
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+		       preserve the latter.  */
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+		    struct link_map **runp = thisp->l_initfini;
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+		    if (runp != NULL)
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+		      while (*runp != NULL)
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+			if (__builtin_expect (*runp++ == maps[k], 0))
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+			  goto ignore;
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+		    goto move;
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 		  }
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-	      }
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-	  }
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-      }
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+	    ignore:;
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+	    }
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+
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+	  --k;
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+	}
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+
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+    skip:
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+      if (++i == nmaps)
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+	break;
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+    next_clear:
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+      memset (&seen[i], 0, (nmaps - i) * sizeof (seen[0]));
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+
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+    next:;
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+    }
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 }
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@@ -196,9 +208,8 @@ _dl_fini (void)
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       assert (ns == LM_ID_BASE || i == nloaded || i == nloaded - 1);
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       nmaps = i;
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-      if (nmaps != 0)
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-	/* Now we have to do the sorting.  */
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-	_dl_sort_fini (GL(dl_ns)[ns]._ns_loaded, maps, nmaps, NULL, ns);
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+      /* Now we have to do the sorting.  */
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+      _dl_sort_fini (maps, nmaps, NULL, ns);
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       /* We do not rely on the linked list of loaded object anymore from
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 	 this point on.  We have our own list here (maps).  The various
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diff -rup a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
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--- a/sysdeps/generic/ldsodefs.h	2012-01-19 12:59:42.446483997 -0700
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+++ b/sysdeps/generic/ldsodefs.h	2012-01-19 14:16:36.242453532 -0700
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@@ -947,7 +947,7 @@ extern void _dl_init (struct link_map *m
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 extern void _dl_fini (void) internal_function;
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 /* Sort array MAPS according to dependencies of the contained objects.  */
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-extern void _dl_sort_fini (struct link_map *l, struct link_map **maps,
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+extern void _dl_sort_fini (struct link_map **maps,
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 			   size_t nmaps, char *used, Lmid_t ns)
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      internal_function;
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