Remove empty frame and full evaluators

There are no virtual methods that require different specialization in
dwarf_expr_context class. This means that derived classes
dwarf_expr_executor and dwarf_evaluate_loc_desc are not needed any
more.

As a result of this, the  evaluate_for_locexpr_baton class base class
is now the dwarf_expr_context class.

There might be a need for a better class hierarchy when we know more
about the direction of the future DWARF versions and gdb extensions,
but that is out of the scope of this patch series.

gdb/ChangeLog:

	* dwarf2/frame.c (class dwarf_expr_executor): Remove class.
	(execute_stack_op): Instantiate dwarf_expr_context instead of
	dwarf_evaluate_loc_desc class.
	* dwarf2/loc.c (class dwarf_evaluate_loc_desc): Remove class.
	(dwarf2_evaluate_loc_desc_full): Instantiate dwarf_expr_context
	instead of dwarf_evaluate_loc_desc class.
	(struct evaluate_for_locexpr_baton): Derive from
	dwarf_expr_context.

1 files changed, 1 insertions, 17 deletions

diff --git a/gdb/dwarf2/frame.c b/gdb/dwarf2/frame.c
index 8d42002..c1219d9 100644
--- a/gdb/dwarf2/frame.c
+++ b/gdb/dwarf2/frame.c
@@ -224,22 +224,6 @@ register %s (#%d) at %s"),
     }
 }
 
-class dwarf_expr_executor : public dwarf_expr_context
-{
-public:
-
-  dwarf_expr_executor (dwarf2_per_objfile *per_objfile)
-    : dwarf_expr_context (per_objfile)
-  {}
-
- private:
-
-  void invalid (const char *op) ATTRIBUTE_NORETURN
-  {
-    error (_("%s is invalid in this context"), op);
-  }
-};
-
 static CORE_ADDR
 execute_stack_op (const gdb_byte *exp, ULONGEST len, int addr_size,
 		  struct frame_info *this_frame, CORE_ADDR initial,
@@ -247,7 +231,7 @@ execute_stack_op (const gdb_byte *exp, ULONGEST len, int addr_size,
 {
   CORE_ADDR result;
 
-  dwarf_expr_executor ctx (per_objfile);
+  dwarf_expr_context ctx (per_objfile);
   scoped_value_mark free_values;
 
   ctx.frame = this_frame;