*** empty log message ***

[deliverable/binutils-gdb.git] / gdb / value.h

diff --git a/gdb/value.h b/gdb/value.h
index f0fdb4cac3baeb7991a8e460cfc548b29fb4696f..76c8e85d43b94e15e07d58c0af7711c3454d01e6 100644 (file)
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -74,6 +74,7 @@ extern void set_value_bitpos (struct value *, int bit);
    bitfields.  */
 
 struct value *value_parent (struct value *);
+extern void set_value_parent (struct value *value, struct value *parent);
 
 /* Describes offset of a value within lval of a structure in bytes.
    If lval == lval_memory, this is an offset to the address.  If lval
@@ -137,6 +138,22 @@ extern struct type *value_enclosing_type (struct value *);
 extern void set_value_enclosing_type (struct value *val,
                                      struct type *new_type);
 
+/* Returns value_type or value_enclosing_type depending on
+   value_print_options.objectprint.
+
+   If RESOLVE_SIMPLE_TYPES is 0 the enclosing type will be resolved
+   only for pointers and references, else it will be returned
+   for all the types (e.g. structures).  This option is useful
+   to prevent retrieving enclosing type for the base classes fields.
+
+   REAL_TYPE_FOUND is used to inform whether the real type was found
+   (or just static type was used).  The NULL may be passed if it is not
+   necessary. */
+
+extern struct type *value_actual_type (struct value *value,
+                                      int resolve_simple_types,
+                                      int *real_type_found);
+
 extern int value_pointed_to_offset (struct value *value);
 extern void set_value_pointed_to_offset (struct value *value, int val);
 extern int value_embedded_offset (struct value *value);
@@ -212,6 +229,20 @@ extern struct value *allocate_computed_value (struct type *type,
                                              const struct lval_funcs *funcs,
                                              void *closure);
 
+/* 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.  */
+
+extern int valprint_check_validity (struct ui_file *stream, struct type *type,
+                                   int embedded_offset,
+                                   const struct value *val);
+
 extern struct value *allocate_optimized_out_value (struct type *type);
 
 /* If VALUE is lval_computed, return its lval_funcs structure.  */
@@ -536,6 +567,9 @@ extern int symbol_read_needs_frame (struct symbol *);
 extern struct value *read_var_value (struct symbol *var,
                                     struct frame_info *frame);
 
+extern struct value *default_read_var_value (struct symbol *var,
+                                            struct frame_info *frame);
+
 extern struct value *allocate_value (struct type *type);
 extern struct value *allocate_value_lazy (struct type *type);
 extern void allocate_value_contents (struct value *value);
@@ -730,10 +764,52 @@ extern struct internalvar *lookup_only_internalvar (const char *name);
 
 extern struct internalvar *create_internalvar (const char *name);
 
-typedef struct value * (*internalvar_make_value) (struct gdbarch *,
-                                                 struct internalvar *);
+/* An internalvar can be dynamically computed by supplying a vector of
+   function pointers to perform various operations.  */
+
+struct internalvar_funcs
+{
+  /* Compute the value of the variable.  The DATA argument passed to
+     the function is the same argument that was passed to
+     `create_internalvar_type_lazy'.  */
+
+  struct value *(*make_value) (struct gdbarch *arch,
+                              struct internalvar *var,
+                              void *data);
+
+  /* Update the agent expression EXPR with bytecode to compute the
+     value.  VALUE is the agent value we are updating.  The DATA
+     argument passed to this function is the same argument that was
+     passed to `create_internalvar_type_lazy'.  If this pointer is
+     NULL, then the internalvar cannot be compiled to an agent
+     expression.  */
+
+  void (*compile_to_ax) (struct internalvar *var,
+                        struct agent_expr *expr,
+                        struct axs_value *value,
+                        void *data);
+
+  /* If non-NULL, this is called to destroy DATA.  The DATA argument
+     passed to this function is the same argument that was passed to
+     `create_internalvar_type_lazy'.  */
+
+  void (*destroy) (void *data);
+};
+
 extern struct internalvar *
-  create_internalvar_type_lazy (char *name, internalvar_make_value fun);
+create_internalvar_type_lazy (const char *name,
+                             const struct internalvar_funcs *funcs,
+                             void *data);
+
+/* Compile an internal variable to an agent expression.  VAR is the
+   variable to compile; EXPR and VALUE are the agent expression we are
+   updating.  This will return 0 if there is no known way to compile
+   VAR, and 1 if VAR was successfully compiled.  It may also throw an
+   exception on error.  */
+
+extern int compile_internalvar_to_ax (struct internalvar *var,
+                                     struct agent_expr *expr,
+                                     struct axs_value *value);
 
 extern struct internalvar *lookup_internalvar (const char *name);