gdb

	PR gdb/9977, PR exp/11636:
	* value.h (value_offset): Update.
	(struct lval_funcs) <check_validity>: New field.
	<copy_closure>: Make argument const.
	(value_computed_closure): Update.
	(value_contents_for_printing): Declare.
	(value_bits_valid): Likewise.
	(val_print): Likewise.
	(set_value_component_location): Update.
	(value_entirely_optimized_out): Declare.
	* value.c (value_offset): Argument now const.
	(require_not_optimized_out): New function.
	(value_contents_for_printing): New function.
	(value_contents_all): Call require_not_optimized_out.
	(value_contents): Likewise.
	(value_bits_valid): New function.
	(value_computed_closure): Argument now const.
	(set_value_component_location): Make 'whole' argument const.
	(value_entirely_optimized_out): New function.
	(value_bitsize): Argument now 'const'.
	(value_bitpos): Likewise.
	(value_type): Likewise.
	* valprint.h (val_print_array_elements): Update.
	* valprint.c (val_print): Add 'val' argument.  Use
	valprint_check_validity.
	(valprint_check_validity): New function.
	(value_check_printable): Use value_entirely_optimized_out.
	(common_val_print): Update.
	(value_print): Likewise.
	(val_print_array_elements): Add 'val' argument.
	* valops.c (value_fetch_lazy): Use value_contents_for_printing,
	value_bits_valid.  Reinit frame cache for lval_computed.
	* sh64-tdep.c (sh64_do_register): Update.
	* scm-valprint.c (scm_val_print): Add 'val' argument.
	* scm-lang.h (scm_val_print): Update.
	* python/python.h (apply_val_pretty_printer): Update.
	* python/py-prettyprint.c (apply_val_pretty_printer): Add 'val'
	argument.  Call set_value_component_location.
	* printcmd.c (print_scalar_formatted): Update.
	* p-valprint.c (pascal_val_print): Add 'val' argument.
	(pascal_object_print_value_fields): Likewise.
	(pascal_object_print_value): Likewise.
	(pascal_object_print_static_field): Update.
	* p-lang.h (pascal_val_print): Update.
	(pascal_object_print_value_fields): Update.
	* mt-tdep.c (mt_registers_info): Update.
	* mi/mi-main.c (get_register): Update.
	(mi_cmd_data_evaluate_expression): Use common_val_print.
	* m2-valprint.c (m2_print_array_contents): Add 'val' argument.
	(m2_print_unbounded_array): Likewise.
	(m2_val_print): Likewise.
	* m2-lang.h (m2_val_print): Update.
	* language.h (struct language_defn) <la_val_print>: Add 'val'
	argument.
	(LA_VAL_PRINT): Likewise.
	* language.c (unk_lang_val_print): Add 'val' argument.
	* jv-valprint.c (java_print_value_fields): Add 'val' argument.
	(java_val_print): Likewise.
	* jv-lang.h (java_val_print): Add 'val' argument.
	* infcmd.c (default_print_registers_info): Update.
	* f-valprint.c (f77_print_array_1): Add 'val' argument.
	(f77_print_array): Likewise.
	(f_val_print): Likewise.
	* f-lang.h (f_val_print): Add 'val' argument.
	* dwarf2loc.c (read_pieced_value): Use value_bitsize and
	value_bitpos.
	<DWARF_VALUE_OPTIMIZED_OUT>: Don't print warning.  Call
	set_value_optimized_out.
	(write_pieced_value): Use value_bitsize and value_bitpos.
	<default>: Don't exit loop.
	(check_pieced_value_validity): New function.
	(pieced_value_funcs): Reference check_pieced_value_validity,
	check_pieced_value_invalid.
	(copy_pieced_value_closure): Update.
	(check_pieced_value_bits): New function.
	(check_pieced_value_invalid): New function.
	* d-valprint.c (dynamic_array_type): Add 'val' argument.
	(d_val_print): Likewise.
	* d-lang.h (d_val_print): Update.
	* cp-valprint.c (cp_print_value_fields): Add 'val' argument.
	(cp_print_value_fields_rtti): Likewise.
	(cp_print_value): Likewise.
	(cp_print_static_field): Update.
	* c-valprint.c (c_val_print): Add 'val' argument.
	(c_value_print): Update.
	* c-lang.h (c_val_print): Update.
	(cp_print_value_fields): Likewise.
	(cp_print_value_fields_rtti): Likewise.
	* ada-valprint.c (struct ada_val_print_args): Remove.
	(val_print_packed_array_elements): Add 'val' argument.
	(ada_val_print): Likewise.  Rewrite.
	(ada_val_print_stub): Remove.
	(ada_val_print_array): Add 'val' argument.
	(ada_val_print_1): Likewise.
	(print_variant_part): Likewise.
	(ada_value_print): Update.
	(print_record): Add 'val' argument.
	(print_field_values): Likewise.
	* ada-lang.h (ada_val_print): Update.
gdb/testsuite
	PR gdb/9977, PR exp/11636::
	* gdb.dwarf2/pieces.exp (pieces_test_f3): Remove kfail.
	(pieces_test_f6): Update expected output.

1 files changed, 52 insertions, 12 deletions

diff --git a/gdb/valprint.c b/gdb/valprint.c
index 2b06579e354..ad6268e2c48 100644
--- a/gdb/valprint.c
+++ b/gdb/valprint.c
@@ -245,6 +245,39 @@ scalar_type_p (struct type *type)
     }
 }
 
+/* Helper function to check the validity of some bits of a value.
+
+   If TYPE represents some aggregate type (e.g., a structure), return 1.
+   
+   Otherwise, any of the bytes starting at OFFSET and extending for
+   TYPE_LENGTH(TYPE) bytes are invalid, print a message to STREAM and
+   return 0.  The checking is done using FUNCS.
+   
+   Otherwise, return 1.  */
+
+static int
+valprint_check_validity (struct ui_file *stream,
+			 struct type *type,
+			 int offset,
+			 const struct value *val)
+{
+  CHECK_TYPEDEF (type);
+
+  if (TYPE_CODE (type) != TYPE_CODE_UNION
+      && TYPE_CODE (type) != TYPE_CODE_STRUCT
+      && TYPE_CODE (type) != TYPE_CODE_ARRAY)
+    {
+      if (! value_bits_valid (val, TARGET_CHAR_BIT * offset,
+			      TARGET_CHAR_BIT * TYPE_LENGTH (type)))
+	{
+	  fprintf_filtered (stream, _("<value optimized out>"));
+	  return 0;
+	}
+    }
+
+  return 1;
+}
+
 /* Print using the given LANGUAGE the data of type TYPE located at VALADDR
    (within GDB), which came from the inferior at address ADDRESS, onto
    stdio stream STREAM according to OPTIONS.
@@ -263,6 +296,7 @@ scalar_type_p (struct type *type)
 int
 val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
 	   CORE_ADDR address, struct ui_file *stream, int recurse,
+	   const struct value *val,
 	   const struct value_print_options *options,
 	   const struct language_defn *language)
 {
@@ -283,16 +317,19 @@ val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
 
   if (TYPE_STUB (real_type))
     {
-      fprintf_filtered (stream, "<incomplete type>");
+      fprintf_filtered (stream, _("<incomplete type>"));
       gdb_flush (stream);
       return (0);
     }
 
+  if (!valprint_check_validity (stream, real_type, embedded_offset, val))
+    return 0;
+
   if (!options->raw)
     {
       ret = apply_val_pretty_printer (type, valaddr, embedded_offset,
-				      address, stream, recurse, options,
-				      language);
+				      address, stream, recurse,
+				      val, options, language);
       if (ret)
 	return ret;
     }
@@ -308,7 +345,8 @@ val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
   TRY_CATCH (except, RETURN_MASK_ERROR)
     {
       ret = language->la_val_print (type, valaddr, embedded_offset, address,
-				    stream, recurse, &local_opts);
+				    stream, recurse, val,
+				    &local_opts);
     }
   if (except.reason < 0)
     fprintf_filtered (stream, _("<error reading variable>"));
@@ -329,7 +367,7 @@ value_check_printable (struct value *val, struct ui_file *stream)
       return 0;
     }
 
-  if (value_optimized_out (val))
+  if (value_entirely_optimized_out (val))
     {
       fprintf_filtered (stream, _("<value optimized out>"));
       return 0;
@@ -369,9 +407,10 @@ common_val_print (struct value *val, struct ui_file *stream, int recurse,
        get a fixed representation of our value.  */
     val = ada_to_fixed_value (val);
 
-  return val_print (value_type (val), value_contents_all (val),
+  return val_print (value_type (val), value_contents_for_printing (val),
 		    value_embedded_offset (val), value_address (val),
-		    stream, recurse, options, language);
+		    stream, recurse,
+		    val, options, language);
 }
 
 /* Print on stream STREAM the value VAL according to OPTIONS.  The value
@@ -390,11 +429,11 @@ value_print (struct value *val, struct ui_file *stream,
   if (!options->raw)
     {
       int r = apply_val_pretty_printer (value_type (val),
-					value_contents_all (val),
+					value_contents_for_printing (val),
 					value_embedded_offset (val),
 					value_address (val),
-					stream, 0, options,
-					current_language);
+					stream, 0,
+					val, options, current_language);
 
       if (r)
 	return r;
@@ -1097,6 +1136,7 @@ void
 val_print_array_elements (struct type *type, const gdb_byte *valaddr,
 			  CORE_ADDR address, struct ui_file *stream,
 			  int recurse,
+			  const struct value *val,
 			  const struct value_print_options *options,
 			  unsigned int i)
 {
@@ -1175,7 +1215,7 @@ val_print_array_elements (struct type *type, const gdb_byte *valaddr,
       if (reps > options->repeat_count_threshold)
 	{
 	  val_print (elttype, valaddr + i * eltlen, 0, address + i * eltlen,
-		     stream, recurse + 1, options, current_language);
+		     stream, recurse + 1, val, options, current_language);
 	  annotate_elt_rep (reps);
 	  fprintf_filtered (stream, " <repeats %u times>", reps);
 	  annotate_elt_rep_end ();
@@ -1186,7 +1226,7 @@ val_print_array_elements (struct type *type, const gdb_byte *valaddr,
       else
 	{
 	  val_print (elttype, valaddr + i * eltlen, 0, address + i * eltlen,
-		     stream, recurse + 1, options, current_language);
+		     stream, recurse + 1, val, options, current_language);
 	  annotate_elt ();
 	  things_printed++;
 	}