/* Definitions for values of C expressions, for GDB.
- Copyright (C) 1986-2020 Free Software Foundation, Inc.
+ Copyright (C) 1986-2022 Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h" /* For struct frame_id. */
#include "extension.h"
#include "gdbsupport/gdb_ref_ptr.h"
+#include "gmp-utils.h"
struct block;
struct expression;
TOVAL is not considered as an lvalue. */
void (*write) (struct value *toval, struct value *fromval);
+ /* Return true if any part of V is optimized out, false otherwise.
+ This will only be called for lazy values -- if the value has been
+ fetched, then the value's optimized-out bits are consulted
+ instead. */
+ bool (*is_optimized_out) (struct value *v);
+
/* If non-NULL, this is used to implement pointer indirection for
this value. This method may return NULL, in which case value_ind
will fall back to ordinary indirection. */
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,
- LONGEST 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. */
get to the real subobject, if the value happens to represent
something embedded in a larger run-time object. */
-extern gdb_byte *value_contents_raw (struct value *);
+extern gdb::array_view<gdb_byte> value_contents_raw (struct value *);
/* Actual contents of the value. For use of this value; setting it
uses the stuff above. Not valid if lazy is nonzero. Target
value. Note that a value therefore extends beyond what is
declared here. */
-extern const gdb_byte *value_contents (struct value *);
-extern gdb_byte *value_contents_writeable (struct value *);
+extern gdb::array_view<const gdb_byte> value_contents (struct value *);
+extern gdb::array_view<gdb_byte> value_contents_writeable (struct value *);
/* The ALL variants of the above two macros do not adjust the returned
pointer by the embedded_offset value. */
-extern gdb_byte *value_contents_all_raw (struct value *);
-extern const gdb_byte *value_contents_all (struct value *);
+extern gdb::array_view<gdb_byte> value_contents_all_raw (struct value *);
+extern gdb::array_view<const gdb_byte> value_contents_all (struct value *);
/* Like value_contents_all, but does not require that the returned
bits be valid. This should only be used in situations where you
plan to check the validity manually. */
-extern const gdb_byte *value_contents_for_printing (struct value *value);
+extern gdb::array_view<const gdb_byte> value_contents_for_printing (struct value *value);
/* Like value_contents_for_printing, but accepts a constant value
pointer. Unlike value_contents_for_printing however, the pointed
value must _not_ be lazy. */
-extern const gdb_byte *
+extern gdb::array_view<const gdb_byte>
value_contents_for_printing_const (const struct value *value);
extern void value_fetch_lazy (struct value *val);
/* Set COMPONENT's location as appropriate for a component of WHOLE
--- regardless of what kind of lvalue WHOLE is. */
extern void set_value_component_location (struct value *component,
- const struct value *whole);
+ const struct value *whole);
/* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
single value might have multiple LVALs), this hacked interface is
extern struct frame_id *deprecated_value_next_frame_id_hack (struct value *);
#define VALUE_NEXT_FRAME_ID(val) (*deprecated_value_next_frame_id_hack (val))
-/* Frame ID of frame to which a register value is relative. This is
- similar to VALUE_NEXT_FRAME_ID, above, but may not be assigned to.
- Note that VALUE_FRAME_ID effectively undoes the "next" operation
- that was performed during the assignment to VALUE_NEXT_FRAME_ID. */
-#define VALUE_FRAME_ID(val) (get_prev_frame_id_by_id (VALUE_NEXT_FRAME_ID (val)))
-
/* Register number if the value is from a register. */
extern int *deprecated_value_regnum_hack (struct value *);
#define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
/* Setup a new value type and enclosing value type for dereferenced value VALUE.
ENC_TYPE is the new enclosing type that should be set. ORIGINAL_TYPE and
- ORIGINAL_VAL are the type and value of the original reference or pointer.
+ ORIGINAL_VAL are the type and value of the original reference or
+ pointer. ORIGINAL_VALUE_ADDRESS is the address within VALUE, that is
+ the address that was dereferenced.
Note, that VALUE is modified by this function.
extern struct value * readjust_indirect_value_type (struct value *value,
struct type *enc_type,
const struct type *original_type,
- const struct value *original_val);
+ struct value *original_val,
+ CORE_ADDR original_value_address);
/* Convert a REF to the object referenced. */
const struct block *var_block,
struct frame_info *frame);
-extern struct value *default_read_var_value (struct symbol *var,
- const struct block *var_block,
- struct frame_info *frame);
-
extern struct value *allocate_value (struct type *type);
extern struct value *allocate_value_lazy (struct type *type);
extern void value_contents_copy (struct value *dst, LONGEST dst_offset,
struct value *src, LONGEST src_offset,
LONGEST length);
-extern void value_contents_copy_raw (struct value *dst, LONGEST dst_offset,
- struct value *src, LONGEST src_offset,
- LONGEST length);
extern struct value *allocate_repeat_value (struct type *type, int count);
extern struct value *value_complement (struct value *arg1);
extern struct value *value_struct_elt (struct value **argp,
- struct value **args,
+ gdb::optional<gdb::array_view <value *>> args,
const char *name, int *static_memfuncp,
const char *err);
struct value *function,
struct type *value_type);
-extern struct value *evaluate_expression (struct expression *exp);
-
-extern struct value *evaluate_type (struct expression *exp);
+/* Evaluate the expression EXP. If set, EXPECT_TYPE is passed to the
+ outermost operation's evaluation. This is ignored by most
+ operations, but may be used, e.g., to determine the type of an
+ otherwise untyped symbol. The caller should not assume that the
+ returned value has this type. */
-extern struct value *evaluate_subexp (struct type *expect_type,
- struct expression *exp,
- int *pos, enum noside noside);
+extern struct value *evaluate_expression (struct expression *exp,
+ struct type *expect_type = nullptr);
-extern struct value *evaluate_subexpression_type (struct expression *exp,
- int subexp);
+extern struct value *evaluate_type (struct expression *exp);
extern value *evaluate_var_value (enum noside noside, const block *blk,
symbol *var);
struct objfile *objfile,
minimal_symbol *msymbol);
-extern value *eval_skip_value (expression *exp);
-
-extern void fetch_subexp_value (struct expression *exp, int *pc,
+namespace expr { class operation; };
+extern void fetch_subexp_value (struct expression *exp,
+ expr::operation *op,
struct value **valp, struct value **resultp,
std::vector<value_ref_ptr> *val_chain,
- int preserve_errors);
-
-extern const char *extract_field_op (struct expression *exp, int *subexp);
-
-extern struct value *evaluate_subexp_with_coercion (struct expression *,
- int *, enum noside);
+ bool preserve_errors);
extern struct value *parse_and_eval (const char *exp);
extern struct value *parse_to_comma_and_eval (const char **expp);
-extern struct type *parse_and_eval_type (char *p, int length);
+extern struct type *parse_and_eval_type (const char *p, int length);
extern CORE_ADDR parse_and_eval_address (const char *exp);
extern int value_less (struct value *arg1, struct value *arg2);
-extern int value_logical_not (struct value *arg1);
+/* Simulate the C operator ! -- return true if ARG1 contains zero. */
+extern bool value_logical_not (struct value *arg1);
+
+/* Returns true if the value VAL represents a true value. */
+static inline bool
+value_true (struct value *val)
+{
+ return !value_logical_not (val);
+}
/* C++ */
extern void typedef_print (struct type *type, struct symbol *news,
struct ui_file *stream);
-extern char *internalvar_name (const struct internalvar *var);
+extern const char *internalvar_name (const struct internalvar *var);
extern void preserve_values (struct objfile *);
extern struct value *value_allocate_space_in_inferior (int);
-extern struct value *value_subscripted_rvalue (struct value *array,
- LONGEST index,
- LONGEST lowerbound);
-
/* User function handler. */
typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
struct value *function,
int argc, struct value **argv);
-char *value_internal_function_name (struct value *);
+const char *value_internal_function_name (struct value *);
/* Build a value wrapping and representing WORKER. The value takes ownership
of the xmethod_worker object. */
exiting (e.g., on quit_force). */
extern void finalize_values ();
+/* Convert VALUE to a gdb_mpq. The caller must ensure that VALUE is
+ of floating-point, fixed-point, or integer type. */
+extern gdb_mpq value_to_gdb_mpq (struct value *value);
+
#endif /* !defined (VALUE_H) */
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