gdb/

	* Makefile.in (gdbtypes_h, gdbtypes.o, utils.o): Update.
	* defs.h (hashtab_obstack_allocate, dummy_obstack_deallocate): Add
	prototypes.
	* dwarf2read.c (read_subroutine_type): Use TYPE_ZALLOC.
	(hashtab_obstack_allocate, dummy_obstack_deallocate): Moved to...
	* utils.c (hashtab_obstack_allocate, dummy_obstack_deallocate):
	...here.
	* gdbtypes.c: Include "hashtab.h".
	(build_gdbtypes): Remove extra prototype.
	(struct type_pair, type_pair_hash, type_pair_eq)
	(create_copied_types_hash, copy_type_recursive): New.
	* gdbtypes.h: Include "hashtab.h".
	(TYPE_ZALLOC): New.
	(create_copied_types_hash, copy_type_recursive): New prototypes.
	* objfiles.c (free_objfile): Call preserve_values.
	* symfile.c (reread_symbols): Likewise.
	(clear_symtab_users): Remove calls to clear_value_history and
	clear_internalvars.
	* value.c (clear_value_history, clear_internalvars): Removed.
	(preserve_one_value, preserve_values): New functions.
	* value.h (clear_value_history, clear_internalvars): Removed.
	(preserve_values): New prototype.

	* tracepoint.c (_initialize_tracepoint): Do not initialize convenience
	variables here.
gdb/doc/
	* gdb.texinfo (Files): Remove obsolete bits from the description
	of "symbol-file".

1 files changed, 24 insertions, 0 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index eb870ac..fdebbdc 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -53,6 +53,7 @@
 #include "annotate.h"
 #include "filenames.h"
 #include "symfile.h"
+#include "gdb_obstack.h"
 
 #include "inferior.h"		/* for signed_pointer_to_address */
 
@@ -3124,3 +3125,26 @@ align_down (ULONGEST v, int n)
   gdb_assert (n && (n & (n-1)) == 0);
   return (v & -n);
 }
+
+/* Allocation function for the libiberty hash table which uses an
+   obstack.  The obstack is passed as DATA.  */
+
+void *
+hashtab_obstack_allocate (void *data, size_t size, size_t count)
+{
+  unsigned int total = size * count;
+  void *ptr = obstack_alloc ((struct obstack *) data, total);
+  memset (ptr, 0, total);
+  return ptr;
+}
+
+/* Trivial deallocation function for the libiberty splay tree and hash
+   table - don't deallocate anything.  Rely on later deletion of the
+   obstack.  DATA will be the obstack, although it is not needed
+   here.  */
+
+void
+dummy_obstack_deallocate (void *object, void *data)
+{
+  return;
+}