* elf/dl-close.c (free_mem): Free _dl_scope_free_list.

	* include/link.h: Don't include rtld-lowlevel.h.
	(struct link_map): Remove l_scope_lock.
	* sysdeps/generic/ldsodefs.h: Don't include rtld-lowlevel.h.
	(_dl_scope_free_list): New field (variable) in _rtld_global.
	(DL_LOOKUP_SCOPE_LOCK): Remove.
	(_dl_scope_free): New prototype.
	* elf/dl-runtime.c (_dl_fixup): Don't use __rtld_mrlock_*lock.
	Don't pass DL_LOOKUP_SCOPE_LOCK to _dl_lookup_symbol_x.
	(_dl_profile_fixup): Likewise.
	* elf/dl-sym.c (do_sym): Likewise.  Use wrapped _dl_lookup_symbol_x
	whenever !RTLD_SINGLE_THREAD_P, use THREAD_GSCOPE_SET_FLAG and
	THREAD_GSCOPE_RESET_FLAG around it.
	* elf/dl-close.c (_dl_close_worker): Don't use
	__rtld_mrlock_{change,done}.  Call _dl_scope_free on the old
	scope.  Make sure THREAD_GSCOPE_WAIT () happens if any old
	scopes were queued or if l_scope_mem has been abandoned.
	* elf/dl-open.c (_dl_scope_free): New function.
	(dl_open_worker): Use it.  Don't use __rtld_mrlock_{change,done}.
	* elf/dl-support.c (_dl_scope_free_list): New variable.
	* elf/dl-lookup.c (add_dependency): Remove flags argument.
	Remove DL_LOOKUP_SCOPE_LOCK handling.
	(_dl_lookup_symbol_x): Adjust caller.  Remove DL_LOOKUP_SCOPE_LOCK
	handling.
	* elf/dl-object.c (_dl_new_object): Don't use
	__rtld_mrlock_initialize.

1 files changed, 9 insertions, 22 deletions

diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index dc1b865bc7..f4e5ce805f 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -86,7 +86,7 @@ dl_new_hash (const char *s)
 /* Add extra dependency on MAP to UNDEF_MAP.  */
 static int
 internal_function
-add_dependency (struct link_map *undef_map, struct link_map *map, int flags)
+add_dependency (struct link_map *undef_map, struct link_map *map)
 {
   struct link_map **list;
   struct link_map *runp;
@@ -99,18 +99,8 @@ add_dependency (struct link_map *undef_map, struct link_map *map, int flags)
   if (undef_map == map)
     return 0;
 
-  /* Make sure nobody can unload the object while we are at it.
-     If we hold a scope lock drop it now to avoid ABBA locking problems.  */
-  if ((flags & DL_LOOKUP_SCOPE_LOCK) != 0 && !RTLD_SINGLE_THREAD_P)
-    {
-      __rtld_mrlock_unlock (undef_map->l_scope_lock);
-
-      __rtld_lock_lock_recursive (GL(dl_load_lock));
-
-      __rtld_mrlock_lock (undef_map->l_scope_lock);
-    }
-  else
-    __rtld_lock_lock_recursive (GL(dl_load_lock));
+  /* Make sure nobody can unload the object while we are at it.  */
+  __rtld_lock_lock_recursive (GL(dl_load_lock));
 
   /* Avoid references to objects which cannot be unloaded anyway.  */
   if (map->l_type != lt_loaded
@@ -237,10 +227,9 @@ _dl_lookup_symbol_x (const char *undef_name, struct link_map *undef_map,
 
   bump_num_relocations ();
 
-  /* No other flag than DL_LOOKUP_ADD_DEPENDENCY and DL_LOOKUP_SCOPE_LOCK
-     is allowed if we look up a versioned symbol.  */
-  assert (version == NULL || (flags & ~(DL_LOOKUP_ADD_DEPENDENCY
-					| DL_LOOKUP_SCOPE_LOCK)) == 0);
+  /* No other flag than DL_LOOKUP_ADD_DEPENDENCY is allowed if we look
+     up a versioned symbol.  */
+  assert (version == NULL || (flags & ~(DL_LOOKUP_ADD_DEPENDENCY)) == 0);
 
   size_t i = 0;
   if (__builtin_expect (skip_map != NULL, 0))
@@ -346,13 +335,11 @@ _dl_lookup_symbol_x (const char *undef_name, struct link_map *undef_map,
 	 runtime lookups.  */
       && (flags & DL_LOOKUP_ADD_DEPENDENCY) != 0
       /* Add UNDEF_MAP to the dependencies.  */
-      && add_dependency (undef_map, current_value.m, flags) < 0)
+      && add_dependency (undef_map, current_value.m) < 0)
       /* Something went wrong.  Perhaps the object we tried to reference
 	 was just removed.  Try finding another definition.  */
-      return _dl_lookup_symbol_x (undef_name, undef_map, ref,
-				  (flags & DL_LOOKUP_SCOPE_LOCK) == 0
-				  ? symbol_scope : undef_map->l_scope, version,
-				  type_class, flags, skip_map);
+      return _dl_lookup_symbol_x (undef_name, undef_map, ref, symbol_scope,
+				  version, type_class, flags, skip_map);
 
   /* The object is used.  */
   current_value.m->l_used = 1;