/* Definitions for values of C expressions, for GDB.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2023 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"
+#include "gdbsupport/gdb_ref_ptr.h"
+#include "gmp-utils.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
value_contents_eq for more info.
*/
+extern bool overload_resolution;
+
/* 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
inferior (i.e. to be put into the history list or an internal
struct value;
+/* Increase VAL's reference count. */
+
+extern void value_incref (struct value *val);
+
+/* Decrease VAL's reference count. When the reference count drops to
+ 0, VAL will be freed. */
+
+extern void value_decref (struct value *val);
+
+/* A policy class to interface gdb::ref_ptr with struct value. */
+
+struct value_ref_policy
+{
+ static void incref (struct value *ptr)
+ {
+ value_incref (ptr);
+ }
+
+ static void decref (struct value *ptr)
+ {
+ value_decref (ptr);
+ }
+};
+
+/* A gdb:;ref_ptr pointer to a struct value. */
+
+typedef gdb::ref_ptr<struct value, value_ref_policy> value_ref_ptr;
+
/* Values are stored in a chain, so that they can be deleted easily
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 *);
+struct value *value_next (const struct value *);
/* Type of the value. */
/* Only used for bitfields; number of bits contained in them. */
-extern int value_bitsize (const struct value *);
-extern void set_value_bitsize (struct value *, int bit);
+extern LONGEST value_bitsize (const struct value *);
+extern void set_value_bitsize (struct value *, LONGEST 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. */
+ little-endian targets, it is the position of the LSB. For
+ big-endian targets, it is the position of the MSB. */
-extern int value_bitpos (const struct value *);
-extern void set_value_bitpos (struct value *, int bit);
+extern LONGEST value_bitpos (const struct value *);
+extern void set_value_bitpos (struct value *, LONGEST 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 *);
+struct value *value_parent (const 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.
within the registers structure. Note also the member
embedded_offset below. */
-extern int value_offset (const struct value *);
-extern void set_value_offset (struct value *, int offset);
+extern LONGEST value_offset (const struct value *);
+extern void set_value_offset (struct value *, LONGEST offset);
/* The comment from "struct value" reads: ``Is it modifiable? Only
relevant if lval != not_lval.''. Shouldn't the value instead be
not_lval and be done with it? */
-extern int deprecated_value_modifiable (struct value *value);
+extern int deprecated_value_modifiable (const struct value *value);
/* If a value represents a C++ object, then the `type' field gives the
object's compile-time type. If the object actually belongs to some
`type', and `embedded_offset' is zero, so everything works
normally. */
-extern struct type *value_enclosing_type (struct value *);
+extern struct type *value_enclosing_type (const struct value *);
extern void set_value_enclosing_type (struct value *val,
struct type *new_type);
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);
-extern void set_value_embedded_offset (struct value *value, int val);
+extern LONGEST value_pointed_to_offset (const struct value *value);
+extern void set_value_pointed_to_offset (struct value *value, LONGEST val);
+extern LONGEST value_embedded_offset (const struct value *value);
+extern void set_value_embedded_offset (struct value *value, LONGEST val);
/* For lval_computed values, this structure holds functions used to
retrieve and set the value (or portions of the value).
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. */
/* 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);
+ LONGEST 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
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. */
element. If you ever change the way lazy flag is set and reset, be
sure to consider this use as well! */
-extern int value_lazy (struct value *);
+extern int value_lazy (const struct value *);
extern void set_value_lazy (struct value *value, int val);
-extern int value_stack (struct value *);
+extern int value_stack (const struct value *);
extern void set_value_stack (struct value *value, int val);
/* Throw an error complaining that the value has been optimized
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);
LENGTH bits as optimized out. */
extern void mark_value_bits_optimized_out (struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* 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 int value_initialized (const 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);
+ 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
/* Like value_address, except the result does not include value's
offset. */
-extern CORE_ADDR value_raw_address (struct value *);
+extern CORE_ADDR value_raw_address (const struct value *);
/* Set the address of a value. */
extern void set_value_address (struct value *, CORE_ADDR);
extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
#define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
-/* Frame register value is relative to. This will be described in the
- lval enum above as "lval_register". */
-extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
-#define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
+/* Frame ID of "next" frame to which a register value is relative. A
+ register value is indicated by VALUE_LVAL being set to lval_register.
+ So, if the register value is found relative to frame F, then the
+ frame id of F->next will be stored in VALUE_NEXT_FRAME_ID. */
+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))
/* Register number if the value is from a register. */
-extern short *deprecated_value_regnum_hack (struct value *);
+extern int *deprecated_value_regnum_hack (struct value *);
#define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
/* Return value after lval_funcs->coerce_ref (after check_typedef). Return
/* 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,
- struct type *original_type,
- struct value *original_val);
+ const struct type *original_type,
+ struct value *original_val,
+ CORE_ADDR original_value_address);
/* Convert a REF to the object referenced. */
extending for LENGTH bits are a synthetic pointer. */
extern int value_bits_synthetic_pointer (const struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* Given a value, determine whether the contents bytes starting at
OFFSET and extending for LENGTH bytes are available. This returns
byte is unavailable. */
extern int value_bytes_available (const struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* Given a value, determine whether the contents bits starting at
OFFSET and extending for LENGTH bits are available. This returns
bit is unavailable. */
extern int value_bits_available (const struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* Like value_bytes_available, but return false if any byte in the
whole object is unavailable. */
LENGTH bytes as unavailable. */
extern void mark_value_bytes_unavailable (struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* Mark VALUE's content bits starting at OFFSET and extending for
LENGTH bits as unavailable. */
extern void mark_value_bits_unavailable (struct value *value,
- int offset, int length);
+ LONGEST offset, LONGEST length);
/* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
LENGTH bytes of VAL2's contents starting at OFFSET2.
example, to compare a complete object value with itself, including
its enclosing type chunk, you'd do:
- int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
+ int len = check_typedef (value_enclosing_type (val))->length ();
value_contents_eq (val, 0, val, 0, len);
Returns true iff the set of available/valid contents match.
Optimized-out contents are equal to optimized-out contents, and are
not equal to non-optimized-out contents.
- Unavailable contente are equal to unavailable contents, and are not
+ Unavailable contents are equal to unavailable contents, and are not
equal to non-unavailable contents.
For example, if 'x's represent an unavailable byte, and 'V' and 'Z'
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, int offset1,
- const struct value *val2, int offset2,
- int length);
+extern bool value_contents_eq (const struct value *val1, LONGEST offset1,
+ const struct value *val2, LONGEST offset2,
+ LONGEST length);
+
+/* An overload of value_contents_eq that compares the entirety of both
+ values. */
+
+extern bool value_contents_eq (const struct value *val1,
+ const struct value *val2);
/* 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, int embedded_offset,
+extern void read_value_memory (struct value *val, LONGEST bit_offset,
int stack, CORE_ADDR memaddr,
gdb_byte *buffer, size_t length);
#include "gdbtypes.h"
#include "expression.h"
-struct frame_info;
+class frame_info_ptr;
struct fn_field;
extern int print_address_demangle (const struct value_print_options *,
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,
const gdb_byte *valaddr,
int fieldno);
+
+/* Unpack a bitfield of the specified FIELD_TYPE, from the object at
+ VALADDR, and store the result in *RESULT.
+ The bitfield starts at BITPOS bits and contains BITSIZE bits; if
+ BITSIZE is zero, then the length is taken from FIELD_TYPE.
+
+ Extracting bits depends on endianness of the machine. Compute the
+ number of least significant bits to discard. For big endian machines,
+ we compute the total number of bits in the anonymous object, subtract
+ off the bit count from the MSB of the object to the MSB of the
+ bitfield, then the size of the bitfield, which leaves the LSB discard
+ count. For little endian machines, the discard count is simply the
+ number of bits from the LSB of the anonymous object to the LSB of the
+ bitfield.
+
+ If the field is signed, we also do sign extension. */
+
+extern LONGEST unpack_bits_as_long (struct type *field_type,
+ const gdb_byte *valaddr,
+ LONGEST bitpos, LONGEST bitsize);
+
extern int unpack_value_field_as_long (struct type *type, const gdb_byte *valaddr,
- int embedded_offset, int fieldno,
+ LONGEST embedded_offset, int fieldno,
const struct value *val, LONGEST *result);
extern void unpack_value_bitfield (struct value *dest_val,
- int bitpos, int bitsize,
- const gdb_byte *valaddr, int embedded_offset,
+ LONGEST bitpos, LONGEST bitsize,
+ const gdb_byte *valaddr,
+ LONGEST embedded_offset,
const struct value *val);
extern struct value *value_field_bitfield (struct type *type, int fieldno,
const gdb_byte *valaddr,
- int embedded_offset,
+ LONGEST embedded_offset,
const struct value *val);
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_host_double (struct type *type, double d);
extern struct value *value_from_history_ref (const char *, const char **);
+extern struct value *value_from_component (struct value *, struct type *,
+ LONGEST);
+
+
+/* Create a new value by extracting it from WHOLE. TYPE is the type
+ of the new value. BIT_OFFSET and BIT_LENGTH describe the offset
+ and field width of the value to extract from WHOLE -- BIT_LENGTH
+ may differ from TYPE's length in the case where WHOLE's type is
+ packed.
+
+ When the value does come from a non-byte-aligned offset or field
+ width, it will be marked non_lval. */
+
+extern struct value *value_from_component_bitsize (struct value *whole,
+ struct type *type,
+ LONGEST bit_offset,
+ LONGEST bit_length);
extern struct value *value_at (struct type *type, CORE_ADDR addr);
extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
struct frame_id frame_id);
extern void read_frame_register_value (struct value *value,
- struct frame_info *frame);
+ frame_info_ptr frame);
extern struct value *value_from_register (struct type *type, int regnum,
- struct frame_info *frame);
+ frame_info_ptr frame);
extern CORE_ADDR address_from_register (int regnum,
- struct frame_info *frame);
+ frame_info_ptr frame);
extern struct value *value_of_variable (struct symbol *var,
const struct block *b);
extern struct value *address_of_variable (struct symbol *var,
const struct block *b);
-extern struct value *value_of_register (int regnum, struct frame_info *frame);
+extern struct value *value_of_register (int regnum, frame_info_ptr frame);
-struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
+struct value *value_of_register_lazy (frame_info_ptr frame, int regnum);
+
+/* Return the symbol's reading requirement. */
+
+extern enum symbol_needs_kind symbol_read_needs (struct symbol *);
+
+/* Return true if the symbol needs a frame. This is a wrapper for
+ symbol_read_needs that simply checks for SYMBOL_NEEDS_FRAME. */
extern int symbol_read_needs_frame (struct symbol *);
extern struct value *read_var_value (struct symbol *var,
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);
+ frame_info_ptr 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, int dst_offset,
- struct value *src, int src_offset,
- int length);
-extern void value_contents_copy_raw (struct value *dst, int dst_offset,
- struct value *src, int src_offset,
- int length);
+extern void value_contents_copy (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_mark (void);
-extern void value_free_to_mark (struct value *mark);
+extern void value_free_to_mark (const struct value *mark);
+
+/* A helper class that uses value_mark at construction time and calls
+ value_free_to_mark in the destructor. This is used to clear out
+ temporary values created during the lifetime of this object. */
+class scoped_value_mark
+{
+ public:
+
+ scoped_value_mark ()
+ : m_value (value_mark ())
+ {
+ }
+
+ ~scoped_value_mark ()
+ {
+ 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 ()
+ {
+ if (m_value != NULL)
+ {
+ value_free_to_mark (m_value);
+ m_value = NULL;
+ }
+ }
+
+ private:
+
+ const struct value *m_value;
+};
extern struct value *value_cstring (const char *ptr, ssize_t len,
struct type *char_type);
extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
-extern int value_must_coerce_to_target (struct value *arg1);
+/* Return true if VAL does not live in target memory, but should in order
+ to operate on it. Otherwise return false. */
+
+extern bool value_must_coerce_to_target (struct value *arg1);
extern struct value *value_coerce_to_target (struct value *arg1);
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 *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);
enum oload_search_type { NON_METHOD, METHOD, BOTH };
-extern int find_overload_match (struct value **args, int nargs,
+extern int find_overload_match (gdb::array_view<value *> args,
const char *name,
enum oload_search_type method,
struct value **objp, struct symbol *fsym,
extern struct value *value_field (struct value *arg1, int fieldno);
-extern struct value *value_primitive_field (struct value *arg1, int offset,
+extern struct value *value_primitive_field (struct value *arg1, LONGEST offset,
int fieldno,
struct type *arg_type);
-extern struct type *value_rtti_indirect_type (struct value *, int *, int *,
+extern struct type *value_rtti_indirect_type (struct value *, int *, LONGEST *,
int *);
extern struct value *value_full_object (struct value *, struct type *, int,
struct value *function,
struct type *value_type);
-extern struct value *evaluate_expression (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_expression (struct expression *exp,
+ struct type *expect_type = nullptr);
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 value *evaluate_var_value (enum noside noside, const block *blk,
+ symbol *var);
-extern struct value *evaluate_subexpression_type (struct expression *exp,
- int subexp);
+extern value *evaluate_var_msym_value (enum noside noside,
+ struct objfile *objfile,
+ minimal_symbol *msymbol);
-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,
- struct value **val_chain,
- int preserve_errors);
-
-extern char *extract_field_op (struct expression *exp, int *subexp);
-
-extern struct value *evaluate_subexp_with_coercion (struct expression *,
- int *, enum noside);
+ std::vector<value_ref_ptr> *val_chain,
+ 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 struct value *access_value_history (int num);
+/* Return the number of items in the value history. */
+
+extern ULONGEST value_history_count ();
+
extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
struct internalvar *var);
extern void clear_internalvar (struct internalvar *var);
extern void set_internalvar_component (struct internalvar *var,
- int offset,
- int bitpos, int bitsize,
+ LONGEST offset,
+ LONGEST bitpos, LONGEST bitsize,
struct value *newvalue);
extern struct internalvar *lookup_only_internalvar (const char *name);
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. */
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 (const char *name,
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++ */
enum noside noside);
extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
- int j, struct type *type, int offset);
+ int j, struct type *type, LONGEST offset);
extern int binop_types_user_defined_p (enum exp_opcode op,
struct type *type1,
extern int destructor_name_p (const char *name, struct type *type);
-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 void release_value_or_incref (struct value *val);
+extern value_ref_ptr release_value (struct value *val);
extern int record_latest_value (struct value *val);
extern void modify_field (struct type *type, gdb_byte *addr,
- LONGEST fieldval, int bitpos, int bitsize);
+ LONGEST fieldval, LONGEST bitpos, LONGEST bitsize);
extern void type_print (struct type *type, const char *varstring,
struct ui_file *stream, int show);
-extern char *type_to_string (struct type *type);
+extern std::string type_to_string (struct type *type);
extern gdb_byte *baseclass_addr (struct type *type, int index,
gdb_byte *valaddr,
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);
-extern void value_print_array_elements (struct value *val,
- struct ui_file *stream, int format,
- enum val_prettyformat pretty);
+/* Release values from the value chain and return them. Values
+ created after MARK are released. If MARK is nullptr, or if MARK is
+ not found on the value chain, then all values are released. Values
+ are returned in reverse order of creation; that is, newest
+ first. */
-extern struct value *value_release_to_mark (struct value *mark);
-
-extern void 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);
+extern std::vector<value_ref_ptr> value_release_to_mark
+ (const struct value *mark);
extern void common_val_print (struct value *val,
struct ui_file *stream, int recurse,
extern void print_variable_and_value (const char *name,
struct symbol *var,
- struct frame_info *frame,
+ frame_info_ptr frame,
struct ui_file *stream,
int indent);
extern void typedef_print (struct type *type, struct symbol *news,
struct ui_file *stream);
-extern char *internalvar_name (struct internalvar *var);
+extern const char *internalvar_name (const struct internalvar *var);
extern void preserve_values (struct objfile *);
/* From values.c */
-extern struct value *value_copy (struct value *);
+extern struct value *value_copy (const value *);
extern struct value *value_non_lval (struct value *);
extern struct value *value_slice (struct value *, int, int);
+/* Create a complex number. The type is the complex type; the values
+ are cast to the underlying scalar type before the complex number is
+ created. */
+
extern struct value *value_literal_complex (struct value *, struct value *,
struct type *);
+/* Return the real part of a complex value. */
+
+extern struct value *value_real_part (struct value *value);
+
+/* Return the imaginary part of a complex value. */
+
+extern struct value *value_imaginary_part (struct value *value);
+
extern struct value *find_function_in_inferior (const char *,
struct objfile **);
extern struct value *value_allocate_space_in_inferior (int);
-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,
int argc,
struct value **argv);
-void add_internal_function (const char *name, const char *doc,
- internal_function_fn handler,
- void *cookie);
+/* Add a new internal function. NAME is the name of the function; DOC
+ is a documentation string describing the function. HANDLER is
+ called when the function is invoked. COOKIE is an arbitrary
+ pointer which is passed to HANDLER and is intended for "user
+ data". */
+
+extern void add_internal_function (const char *name, const char *doc,
+ internal_function_fn handler,
+ void *cookie);
+
+/* This overload takes an allocated documentation string. */
+
+extern void add_internal_function (gdb::unique_xmalloc_ptr<char> &&name,
+ gdb::unique_xmalloc_ptr<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 *);
+const char *value_internal_function_name (struct value *);
+
+/* Build a value wrapping and representing WORKER. The value takes ownership
+ of the xmethod_worker object. */
-extern struct value *value_of_xmethod (struct xmethod_worker *);
+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);
+ gdb::array_view<value *> argv);
extern struct value *call_xmethod (struct value *method,
- int argc, struct value **argv);
+ gdb::array_view<value *> argv);
+
+/* Destroy the values currently allocated. This is called when GDB is
+ 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) */
projects / binutils-gdb.git / blobdiff