Jakub Jelinek <jakub@redhat.com>

	Implement reference counting of scope records.
	* elf/dl-close.c (_dl_close): Remove all scopes from removed objects
	from the list in objects which remain.  Always allocate new scope
	record.
	* elf/dl-open.c (dl_open_worker): When growing array for scopes,
	don't resize, allocate a new one.
	* elf/dl-runtime.c: Update reference counters before using a scope
	array.
	* elf/dl-sym.c: Likewise.
	* elf/dl-libc.c: Adjust for l_scope name change.
	* elf/dl-load.c: Likewise.
	* elf/dl-object.c: Likewise.
	* elf/rtld.c: Likewise.
	* include/link.h: Inlcude <rtld-lowlevel.h>.  Define struct
	r_scoperec.  Replace r_scope with pointer to r_scoperec structure.
	Add l_scoperec_lock.
	* sysdeps/generic/ldsodefs.h: Include <rtld-lowlevel.h>.
	* sysdeps/generic/rtld-lowlevel.h: New file.

	* include/atomic.h: Rename atomic_and to atomic_and_val and
	atomic_or to atomic_or_val.  Define new macros atomic_and and
	atomic_or which do not return values.
	* sysdeps/x86_64/bits/atomic.h: Define atomic_and and atomic_or.
	Various cleanups.
	* sysdeps/i386/i486/bits/atomic.h: Likewise.

1 files changed, 8 insertions, 7 deletions

diff --git a/elf/rtld.c b/elf/rtld.c
index 7746377f37..ace3a3099d 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -609,7 +609,7 @@ relocate_doit (void *a)
 {
   struct relocate_args *args = (struct relocate_args *) a;
 
-  _dl_relocate_object (args->l, args->l->l_scope, args->lazy, 0);
+  _dl_relocate_object (args->l, args->l->l_scoperec->scope, args->lazy, 0);
 }
 
 static void
@@ -1963,8 +1963,8 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
 	    lookup_t result;
 
 	    result = _dl_lookup_symbol_x (INTUSE(_dl_argv)[i], main_map,
-					  &ref, main_map->l_scope, NULL,
-					  ELF_RTYPE_CLASS_PLT,
+					  &ref, main_map->l_scoperec->scope,
+					  NULL, ELF_RTYPE_CLASS_PLT,
 					  DL_LOOKUP_ADD_DEPENDENCY, NULL);
 
 	    loadbase = LOOKUP_VALUE_ADDRESS (result);
@@ -2006,8 +2006,8 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
 		{
 		  /* Mark the link map as not yet relocated again.  */
 		  GL(dl_rtld_map).l_relocated = 0;
-		  _dl_relocate_object (&GL(dl_rtld_map), main_map->l_scope,
-				       0, 0);
+		  _dl_relocate_object (&GL(dl_rtld_map),
+				       main_map->l_scoperec->scope, 0, 0);
 		}
             }
 #define VERNEEDTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERNEED))
@@ -2227,7 +2227,7 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
 	    }
 
 	  if (l != &GL(dl_rtld_map))
-	    _dl_relocate_object (l, l->l_scope, GLRO(dl_lazy),
+	    _dl_relocate_object (l, l->l_scoperec->scope, GLRO(dl_lazy),
 				 consider_profiling);
 
 #ifdef USE_TLS
@@ -2303,7 +2303,8 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
       HP_TIMING_NOW (start);
       /* Mark the link map as not yet relocated again.  */
       GL(dl_rtld_map).l_relocated = 0;
-      _dl_relocate_object (&GL(dl_rtld_map), main_map->l_scope, 0, 0);
+      _dl_relocate_object (&GL(dl_rtld_map), main_map->l_scoperec->scope,
+			   0, 0);
       HP_TIMING_NOW (stop);
       HP_TIMING_DIFF (add, start, stop);
       HP_TIMING_ACCUM_NT (relocate_time, add);