/* Definitions for values of C expressions, for GDB.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GDB.
#if !defined (VALUE_H)
#define VALUE_H 1
-#include "doublest.h"
#include "frame.h" /* For struct frame_id. */
+#include "extension.h"
struct block;
struct expression;
struct ui_file;
struct language_defn;
struct value_print_options;
-struct xmethod_worker;
/* Values can be partially 'optimized out' and/or 'unavailable'.
These are distinct states and have different string representations
then:
- value_contents_eq(val, 0, val, 8, 6) => 1
- value_contents_eq(val, 0, val, 4, 4) => 0
- value_contents_eq(val, 0, val, 8, 8) => 0
- value_contents_eq(val, 4, val, 12, 2) => 1
- value_contents_eq(val, 4, val, 12, 4) => 0
- value_contents_eq(val, 3, val, 4, 4) => 0
+ value_contents_eq(val, 0, val, 8, 6) => true
+ value_contents_eq(val, 0, val, 4, 4) => false
+ value_contents_eq(val, 0, val, 8, 8) => false
+ value_contents_eq(val, 4, val, 12, 2) => true
+ value_contents_eq(val, 4, val, 12, 4) => true
+ value_contents_eq(val, 3, val, 4, 4) => true
If 'x's represent an unavailable byte, 'o' represents an optimized
out byte, in a value with length 8:
then:
- value_contents_eq(val, 0, val, 2, 2) => 1
- value_contents_eq(val, 4, val, 6, 2) => 1
- value_contents_eq(val, 0, val, 4, 4) => 0
+ value_contents_eq(val, 0, val, 2, 2) => true
+ value_contents_eq(val, 4, val, 6, 2) => true
+ value_contents_eq(val, 0, val, 4, 4) => true
We only know whether a value chunk is unavailable or optimized out
if we've tried to read it. As this routine is used by printing
after the inferior is gone, it works with const values. Therefore,
this routine must not be called with lazy values. */
-extern int value_contents_eq (const struct value *val1, LONGEST offset1,
- const struct value *val2, LONGEST offset2,
- LONGEST length);
+extern bool value_contents_eq (const struct value *val1, LONGEST offset1,
+ const struct value *val2, LONGEST offset2,
+ LONGEST length);
/* Read LENGTH addressable memory units starting at MEMADDR into BUFFER,
which is (or will be copied to) VAL's contents buffer offset by
- EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
- Marks value contents ranges as unavailable if the corresponding
- memory is likewise unavailable. STACK indicates whether the memory
- is known to be stack memory. */
+ BIT_OFFSET bits. Marks value contents ranges as unavailable if
+ the corresponding memory is likewise unavailable. STACK indicates
+ whether the memory is known to be stack memory. */
-extern void read_value_memory (struct value *val, LONGEST embedded_offset,
+extern void read_value_memory (struct value *val, LONGEST bit_offset,
int stack, CORE_ADDR memaddr,
gdb_byte *buffer, size_t length);
struct gdbarch *, CORE_ADDR,
struct ui_file *, int);
+/* Returns true if VAL is of floating-point type. In addition,
+ throws an error if the value is an invalid floating-point value. */
+extern bool is_floating_value (struct value *val);
+
extern LONGEST value_as_long (struct value *val);
-extern DOUBLEST value_as_double (struct value *val);
extern CORE_ADDR value_as_address (struct value *val);
extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
-extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
- int *invp);
extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
extern LONGEST unpack_field_as_long (struct type *type,
extern struct value *value_from_longest (struct type *type, LONGEST num);
extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
-extern struct value *value_from_double (struct type *type, DOUBLEST num);
-extern struct value *value_from_decfloat (struct type *type,
- const gdb_byte *decbytes);
extern struct value *value_from_history_ref (const char *, const char **);
extern struct value *value_from_component (struct value *, struct type *,
LONGEST);
free_to_mark ();
}
+ scoped_value_mark (scoped_value_mark &&other) = default;
+
+ DISABLE_COPY_AND_ASSIGN (scoped_value_mark);
+
/* Free the values currently on the value stack. */
void free_to_mark ()
{
extern struct value *value_addr (struct value *arg1);
-extern struct value *value_ref (struct value *arg1);
+extern struct value *value_ref (struct value *arg1, enum type_code refcode);
extern struct value *value_assign (struct value *toval,
struct value *fromval);
extern struct value *evaluate_subexpression_type (struct expression *exp,
int subexp);
+extern value *evaluate_var_value (enum noside noside, const block *blk,
+ symbol *var);
+
+extern value *evaluate_var_msym_value (enum noside noside,
+ struct objfile *objfile,
+ minimal_symbol *msymbol);
+
+extern value *eval_skip_value (expression *exp);
+
extern void fetch_subexp_value (struct expression *exp, int *pc,
struct value **valp, struct value **resultp,
struct value **val_chain,
extern struct internalvar *create_internalvar (const char *name);
-extern VEC (char_ptr) *complete_internalvar (const char *name);
+extern void complete_internalvar (completion_tracker &tracker,
+ const char *name);
/* An internalvar can be dynamically computed by supplying a vector of
function pointers to perform various operations. */
extern void value_free (struct value *val);
+/* A free policy class to interface std::unique_ptr with
+ value_free. */
+
+struct value_deleter
+{
+ void operator() (struct value *value) const
+ {
+ value_free (value);
+ }
+};
+
+/* A unique pointer to a struct value. */
+
+typedef std::unique_ptr<struct value, value_deleter> gdb_value_up;
+
extern void free_all_values (void);
extern void free_value_chain (struct value *v);
extern void print_floating (const gdb_byte *valaddr, struct type *type,
struct ui_file *stream);
-extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
- struct ui_file *stream);
-
extern void value_print (struct value *val, struct ui_file *stream,
const struct value_print_options *options);
char *value_internal_function_name (struct value *);
-extern struct value *value_of_xmethod (struct xmethod_worker *);
+/* Build a value wrapping and representing WORKER. The value takes ownership
+ of the xmethod_worker object. */
+
+extern struct value *value_from_xmethod (xmethod_worker_up &&worker);
extern struct type *result_type_of_xmethod (struct value *method,
int argc, struct value **argv);