Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
- 2008 Free Software Foundation, Inc.
+ 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
This file is part of GDB.
struct symbol;
struct type;
struct ui_file;
+struct language_defn;
+struct value_print_options;
/* The structure which defines the type of a value. It should never
be possible for a program lval value to survive over a call to the
struct value;
/* Values are stored in a chain, so that they can be deleted easily
- over calls to the inferior. Values assigned to internal variables
- or put into the value history are taken off this list. */
+ over calls to the inferior. Values assigned to internal variables,
+ put into the value history or exposed to Python are taken off this
+ list. */
struct value *value_next (struct value *);
/* Type of the value. */
-extern struct type *value_type (struct value *);
+extern struct type *value_type (const struct value *);
/* This is being used to change the type of an existing value, that
code should instead be creating a new value with the changed type
/* Only used for bitfields; number of bits contained in them. */
-extern int value_bitsize (struct value *);
+extern int value_bitsize (const struct value *);
extern void set_value_bitsize (struct value *, int bit);
/* Only used for bitfields; position of start of field. For
gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For
gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */
-extern int value_bitpos (struct value *);
+extern int value_bitpos (const struct value *);
extern void set_value_bitpos (struct value *, int bit);
+/* Only used for bitfields; the containing value. This allows a
+ single read from the target when displaying multiple
+ bitfields. */
+
+struct value *value_parent (struct value *);
+
/* 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
== lval_register, this is a further offset from location.address
within the registers structure. Note also the member
embedded_offset below. */
-extern int value_offset (struct value *);
+extern int value_offset (const struct value *);
extern void set_value_offset (struct value *, int offset);
/* The comment from "struct value" reads: ``Is it modifiable? Only
normally. */
extern struct type *value_enclosing_type (struct value *);
-extern struct value *value_change_enclosing_type (struct value *val,
- struct type *new_type);
+extern void set_value_enclosing_type (struct value *val,
+ struct type *new_type);
+
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);
extern void set_value_embedded_offset (struct value *value, int val);
+/* For lval_computed values, this structure holds functions used to
+ retrieve and set the value (or portions of the value).
+
+ For each function, 'V' is the 'this' pointer: an lval_funcs
+ function F may always assume that the V it receives is an
+ lval_computed value, and has F in the appropriate slot of its
+ lval_funcs structure. */
+
+struct lval_funcs
+{
+ /* Fill in VALUE's contents. This is used to "un-lazy" values. If
+ a problem arises in obtaining VALUE's bits, this function should
+ call 'error'. */
+ void (*read) (struct value *v);
+
+ /* Handle an assignment TOVAL = FROMVAL by writing the value of
+ FROMVAL to TOVAL's location. The contents of TOVAL have not yet
+ been updated. If a problem arises in doing so, this function
+ should call 'error'. */
+ void (*write) (struct value *toval, struct value *fromval);
+
+ /* Check the validity of some bits in VALUE. This should return 1
+ if all the bits starting at OFFSET and extending for LENGTH bits
+ are valid, or 0 if any bit is invalid. */
+ int (*check_validity) (const struct value *value, int offset, int length);
+
+ /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
+ int (*check_any_valid) (const struct value *value);
+
+ /* 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. */
+ struct value *(*indirect) (struct value *value);
+
+ /* If non-NULL, this is used to determine whether the indicated bits
+ of VALUE are a synthetic pointer. */
+ int (*check_synthetic_pointer) (const struct value *value,
+ int offset, int length);
+
+ /* Return a duplicate of VALUE's closure, for use in a new value.
+ This may simply return the same closure, if VALUE's is
+ reference-counted or statically allocated.
+
+ This may be NULL, in which case VALUE's closure is re-used in the
+ new value. */
+ void *(*copy_closure) (const struct value *v);
+
+ /* Drop VALUE's reference to its closure. Maybe this frees the
+ closure; maybe this decrements a reference count; maybe the
+ closure is statically allocated and this does nothing.
+
+ This may be NULL, in which case no action is taken to free
+ VALUE's closure. */
+ void (*free_closure) (struct value *v);
+};
+
+/* Create a computed lvalue, with type TYPE, function pointers FUNCS,
+ and closure CLOSURE. */
+
+extern struct value *allocate_computed_value (struct type *type,
+ struct lval_funcs *funcs,
+ void *closure);
+
+/* If VALUE is lval_computed, return its lval_funcs structure. */
+
+extern struct lval_funcs *value_computed_funcs (struct value *value);
+
+/* If VALUE is lval_computed, return its closure. The meaning of the
+ returned value depends on the functions VALUE uses. */
+
+extern void *value_computed_closure (const struct value *value);
+
/* If zero, contents of this value are in the contents field. If
- nonzero, contents are in inferior memory at address in the
- location.address field plus the offset field (and the lval field
- should be lval_memory).
+ nonzero, contents are in inferior. If the lval field is lval_memory,
+ the contents are in inferior memory at location.address plus offset.
+ The lval field may also be lval_register.
WARNING: This field is used by the code which handles watchpoints
(see breakpoint.c) to decide whether a particular value can be
extern int value_lazy (struct value *);
extern void set_value_lazy (struct value *value, int val);
+extern int value_stack (struct value *);
+extern void set_value_stack (struct value *value, int val);
+
/* value_contents() and value_contents_raw() both return the address
of the gdb buffer used to hold a copy of the contents of the lval.
value_contents() is used when the contents of the buffer are needed
extern gdb_byte *value_contents_all_raw (struct value *);
extern 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 int value_fetch_lazy (struct value *val);
extern int value_contents_equal (struct value *val1, struct value *val2);
extern int value_optimized_out (struct value *value);
extern void set_value_optimized_out (struct value *value, int val);
+/* Like value_optimized_out, but return false if any bit in the object
+ is valid. */
+extern int value_entirely_optimized_out (const struct value *value);
+
/* Set or return field indicating whether a variable is initialized or
not, based on debugging information supplied by the compiler.
1 = initialized; 0 = uninitialized. */
extern int value_initialized (struct value *);
extern void set_value_initialized (struct value *, int);
+/* 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);
+
/* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
single value might have multiple LVALs), this hacked interface is
limited to just the first PIECE. Expect further change. */
extern enum lval_type *deprecated_value_lval_hack (struct value *);
#define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
-/* If lval == lval_memory, this is the address in the inferior. If
- lval == lval_register, this is the byte offset into the registers
- structure. */
-extern CORE_ADDR *deprecated_value_address_hack (struct value *);
-#define VALUE_ADDRESS(val) (*deprecated_value_address_hack (val))
+/* If lval == lval_memory, return the address in the inferior. If
+ lval == lval_register, return the byte offset into the registers
+ structure. Otherwise, return 0. The returned address
+ includes the offset, if any. */
+extern CORE_ADDR value_address (struct value *);
+
+/* Like value_address, except the result does not include value's
+ offset. */
+extern CORE_ADDR value_raw_address (struct value *);
+
+/* Set the address of a value. */
+extern void set_value_address (struct value *, CORE_ADDR);
/* Pointer to internal variable. */
extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
extern struct value *coerce_ref (struct value *value);
/* If ARG is an array, convert it to a pointer.
- If ARG is an enum, convert it to an integer.
If ARG is a function, convert it to a function pointer.
References are dereferenced. */
extern struct value *coerce_array (struct value *value);
-extern struct value *coerce_number (struct value *value);
-/* If ARG is an enum, convert it to an integer. */
+/* Given a value, determine whether the bits starting at OFFSET and
+ extending for LENGTH bits are valid. This returns nonzero if all
+ bits in the given range are valid, zero if any bit is invalid. */
-extern struct value *coerce_enum (struct value *value);
+extern int value_bits_valid (const struct value *value,
+ int offset, int length);
-/* Internal variables (variables for convenience of use of debugger)
- are recorded as a chain of these structures. */
+/* Given a value, determine whether the bits starting at OFFSET and
+ extending for LENGTH bits are a synthetic pointer. */
-struct internalvar
-{
- struct internalvar *next;
- char *name;
- struct value *value;
- int endian;
-};
+extern int value_bits_synthetic_pointer (const struct value *value,
+ int offset, int length);
\f
struct frame_info;
struct fn_field;
-extern void print_address_demangle (CORE_ADDR, struct ui_file *, int);
+extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
+ struct ui_file *, int);
extern LONGEST value_as_long (struct value *val);
extern DOUBLEST value_as_double (struct value *val);
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);
+LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
+ int bitpos, int bitsize);
extern LONGEST unpack_field_as_long (struct type *type,
const gdb_byte *valaddr,
int fieldno);
extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
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_string (char *string);
extern struct value *value_at (struct type *type, CORE_ADDR addr);
extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
+extern struct value *value_from_contents_and_address (struct type *,
+ const gdb_byte *,
+ CORE_ADDR);
+
extern struct value *default_value_from_register (struct type *type,
int regnum,
struct frame_info *frame);
extern struct value *value_of_variable (struct symbol *var, struct block *b);
+extern struct value *address_of_variable (struct symbol *var, struct block *b);
+
extern struct value *value_of_register (int regnum, struct frame_info *frame);
+struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
+
extern int symbol_read_needs_frame (struct symbol *);
extern struct value *read_var_value (struct symbol *var,
struct frame_info *frame);
-extern struct value *locate_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);
extern struct value *allocate_repeat_value (struct type *type, int count);
extern void value_free_to_mark (struct value *mark);
-extern struct value *value_string (char *ptr, int len);
-extern struct value *value_bitstring (char *ptr, int len);
+extern struct value *value_cstring (char *ptr, int len,
+ struct type *char_type);
+extern struct value *value_string (char *ptr, int len,
+ struct type *char_type);
+extern struct value *value_bitstring (char *ptr, int len,
+ struct type *index_type);
extern struct value *value_array (int lowbound, int highbound,
struct value **elemvec);
extern struct value *value_binop (struct value *arg1, struct value *arg2,
enum exp_opcode op);
-extern struct value *value_add (struct value *arg1, struct value *arg2);
+extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
+
+extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
+
+extern int value_must_coerce_to_target (struct value *arg1);
-extern struct value *value_sub (struct value *arg1, struct value *arg2);
+extern struct value *value_coerce_to_target (struct value *arg1);
extern struct value *value_coerce_array (struct value *arg1);
extern struct value *value_struct_elt (struct value **argp,
struct value **args,
- char *name, int *static_memfuncp,
- char *err);
+ const char *name, int *static_memfuncp,
+ const char *err);
extern struct value *value_aggregate_elt (struct type *curtype,
char *name,
+ struct type *expect_type,
int want_address,
enum noside noside);
extern struct value *value_static_field (struct type *type, int fieldno);
-extern struct fn_field *value_find_oload_method_list (struct value **, char *,
+extern struct fn_field *value_find_oload_method_list (struct value **,
+ const char *,
int, int *,
struct type **, int *);
+enum oload_search_type { NON_METHOD, METHOD, BOTH };
+
extern int find_overload_match (struct type **arg_types, int nargs,
- char *name, int method, int lax,
+ const char *name,
+ enum oload_search_type method, int lax,
struct value **objp, struct symbol *fsym,
struct value **valp, struct symbol **symp,
- int *staticp);
+ int *staticp, const int no_adl);
extern struct value *value_field (struct value *arg1, int fieldno);
extern struct value *value_cast (struct type *type, struct value *arg2);
+extern struct value *value_reinterpret_cast (struct type *type,
+ struct value *arg);
+
+extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
+
extern struct value *value_zero (struct type *type, enum lval_type lv);
extern struct value *value_one (struct type *type, enum lval_type lv);
extern struct value *value_repeat (struct value *arg1, int count);
-extern struct value *value_subscript (struct value *array, struct value *idx);
+extern struct value *value_subscript (struct value *array, LONGEST index);
+
+extern struct value *value_bitstring_subscript (struct type *type,
+ struct value *bitstring,
+ LONGEST index);
extern struct value *register_value_being_returned (struct type *valtype,
struct regcache *retbuf);
-extern struct value *value_in (struct value *element, struct value *set);
+extern int value_in (struct value *element, struct value *set);
extern int value_bit_index (struct type *type, const gdb_byte *addr,
int index);
-extern int using_struct_return (struct type *value_type);
+extern int using_struct_return (struct gdbarch *gdbarch,
+ struct type *func_type,
+ struct type *value_type);
extern struct value *evaluate_expression (struct expression *exp);
extern struct value *evaluate_type (struct expression *exp);
+extern struct value *evaluate_subexp (struct type *expect_type,
+ struct expression *exp,
+ int *pos, enum noside noside);
+
+extern struct value *evaluate_subexpression_type (struct expression *exp,
+ int subexp);
+
+extern void fetch_subexp_value (struct expression *exp, int *pc,
+ struct value **valp, struct value **resultp,
+ struct value **val_chain);
+
+extern char *extract_field_op (struct expression *exp, int *subexp);
+
extern struct value *evaluate_subexp_with_coercion (struct expression *,
int *, enum noside);
extern LONGEST parse_and_eval_long (char *exp);
+extern void unop_promote (const struct language_defn *language,
+ struct gdbarch *gdbarch,
+ struct value **arg1);
+
+extern void binop_promote (const struct language_defn *language,
+ struct gdbarch *gdbarch,
+ struct value **arg1, struct value **arg2);
+
extern struct value *access_value_history (int num);
-extern struct value *value_of_internalvar (struct internalvar *var);
+extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
+ struct internalvar *var);
+
+extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
extern void set_internalvar (struct internalvar *var, struct value *val);
+extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
+
+extern void set_internalvar_string (struct internalvar *var,
+ const char *string);
+
+extern void clear_internalvar (struct internalvar *var);
+
extern void set_internalvar_component (struct internalvar *var,
int offset,
int bitpos, int bitsize,
struct value *newvalue);
-extern struct internalvar *lookup_only_internalvar (char *name);
+extern struct internalvar *lookup_only_internalvar (const char *name);
-extern struct internalvar *create_internalvar (char *name);
+extern struct internalvar *create_internalvar (const char *name);
-extern struct internalvar *lookup_internalvar (char *name);
+typedef struct value * (*internalvar_make_value) (struct gdbarch *,
+ struct internalvar *);
+extern struct internalvar *
+ create_internalvar_type_lazy (char *name, internalvar_make_value fun);
+
+extern struct internalvar *lookup_internalvar (const char *name);
extern int value_equal (struct value *arg1, struct value *arg2);
+extern int value_equal_contents (struct value *arg1, struct value *arg2);
+
extern int value_less (struct value *arg1, struct value *arg2);
extern int value_logical_not (struct value *arg1);
extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
int j, struct type *type, int offset);
+extern int binop_types_user_defined_p (enum exp_opcode op,
+ struct type *type1,
+ struct type *type2);
+
extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
struct value *arg2);
extern int destructor_name_p (const char *name, const struct type *type);
-#define value_free(val) xfree (val)
+extern void value_incref (struct value *val);
+
+extern void value_free (struct value *val);
extern void free_all_values (void);
+extern void free_value_chain (struct value *v);
+
extern void release_value (struct value *val);
extern int record_latest_value (struct value *val);
-extern void modify_field (gdb_byte *addr, LONGEST fieldval, int bitpos,
- int bitsize);
+extern void modify_field (struct type *type, gdb_byte *addr,
+ LONGEST fieldval, int bitpos, int bitsize);
extern void type_print (struct type *type, char *varstring,
struct ui_file *stream, int show);
+extern char *type_to_string (struct type *type);
+
extern gdb_byte *baseclass_addr (struct type *type, int index,
gdb_byte *valaddr,
struct value **valuep, int *errp);
extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
struct ui_file *stream);
-extern int value_print (struct value *val, struct ui_file *stream, int format,
- enum val_prettyprint pretty);
+extern int value_print (struct value *val, struct ui_file *stream,
+ const struct value_print_options *options);
extern void value_print_array_elements (struct value *val,
struct ui_file *stream, int format,
extern int val_print (struct type *type, const gdb_byte *valaddr,
int embedded_offset, CORE_ADDR address,
- struct ui_file *stream, int format,
- int deref_ref, int recurse,
- enum val_prettyprint pretty);
+ struct ui_file *stream, int recurse,
+ const struct value *val,
+ const struct value_print_options *options,
+ const struct language_defn *language);
extern int common_val_print (struct value *val,
- struct ui_file *stream, int format,
- int deref_ref, int recurse,
- enum val_prettyprint pretty);
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ const struct language_defn *language);
-extern int val_print_string (CORE_ADDR addr, int len, int width,
- struct ui_file *stream);
+extern int val_print_string (struct type *elttype, const char *encoding,
+ CORE_ADDR addr, int len,
+ struct ui_file *stream,
+ const struct value_print_options *options);
-extern void print_variable_value (struct symbol *var,
- struct frame_info *frame,
- struct ui_file *stream);
+extern void print_variable_and_value (const char *name,
+ struct symbol *var,
+ struct frame_info *frame,
+ struct ui_file *stream,
+ int indent);
-extern int check_field (struct value *, const char *);
+extern int check_field (struct type *, const char *);
extern void typedef_print (struct type *type, struct symbol *news,
struct ui_file *stream);
extern struct value *value_copy (struct value *);
+extern struct value *value_non_lval (struct value *);
+
+extern void preserve_one_value (struct value *, struct objfile *, htab_t);
+
/* From valops.c */
extern struct value *varying_to_slice (struct value *);
extern struct value *value_literal_complex (struct value *, struct value *,
struct type *);
-extern struct value *find_function_in_inferior (const char *);
+extern struct value *find_function_in_inferior (const char *,
+ struct objfile **);
extern struct value *value_allocate_space_in_inferior (int);
extern struct value *value_of_local (const char *name, int complain);
+extern struct value *value_subscripted_rvalue (struct value *array,
+ LONGEST index, int lowerbound);
+
+/* User function handler. */
+
+typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
+ const struct language_defn *language,
+ void *cookie,
+ int argc,
+ struct value **argv);
+
+void add_internal_function (const char *name, const char *doc,
+ internal_function_fn handler,
+ void *cookie);
+
+struct value *call_internal_function (struct gdbarch *gdbarch,
+ const struct language_defn *language,
+ struct value *function,
+ int argc, struct value **argv);
+
+char *value_internal_function_name (struct value *);
+
#endif /* !defined (VALUE_H) */
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