void _initialize_values (void);
+struct value
+{
+ /* Type of value; either not an lval, or one of the various
+ different possible kinds of lval. */
+ enum lval_type lval;
+
+ /* Is it modifiable? Only relevant if lval != not_lval. */
+ int modifiable;
+
+ /* Location of value (if lval). */
+ union
+ {
+ /* If lval == lval_memory, this is the address in the inferior.
+ If lval == lval_register, this is the byte offset into the
+ registers structure. */
+ CORE_ADDR address;
+
+ /* Pointer to internal variable. */
+ struct internalvar *internalvar;
+ } location;
+
+ /* 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. */
+ int offset;
+
+ /* Only used for bitfields; number of bits contained in them. */
+ int bitsize;
+
+ /* Only used for bitfields; position of start of field. For
+ BITS_BIG_ENDIAN=0 targets, it is the position of the LSB. For
+ BITS_BIG_ENDIAN=1 targets, it is the position of the MSB. */
+ int bitpos;
+
+ /* Frame register value is relative to. This will be described in
+ the lval enum above as "lval_register". */
+ struct frame_id frame_id;
+
+ /* Type of the value. */
+ struct type *type;
+
+ /* 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 class derived from `type', perhaps with other base
+ classes and additional members, then `type' is just a subobject
+ of the real thing, and the full object is probably larger than
+ `type' would suggest.
+
+ If `type' is a dynamic class (i.e. one with a vtable), then GDB
+ can actually determine the object's run-time type by looking at
+ the run-time type information in the vtable. When this
+ information is available, we may elect to read in the entire
+ object, for several reasons:
+
+ - When printing the value, the user would probably rather see the
+ full object, not just the limited portion apparent from the
+ compile-time type.
+
+ - If `type' has virtual base classes, then even printing `type'
+ alone may require reaching outside the `type' portion of the
+ object to wherever the virtual base class has been stored.
+
+ When we store the entire object, `enclosing_type' is the run-time
+ type -- the complete object -- and `embedded_offset' is the
+ offset of `type' within that larger type, in bytes. The
+ value_contents() macro takes `embedded_offset' into account, so
+ most GDB code continues to see the `type' portion of the value,
+ just as the inferior would.
+
+ If `type' is a pointer to an object, then `enclosing_type' is a
+ pointer to the object's run-time type, and `pointed_to_offset' is
+ the offset in bytes from the full object to the pointed-to object
+ -- that is, the value `embedded_offset' would have if we followed
+ the pointer and fetched the complete object. (I don't really see
+ the point. Why not just determine the run-time type when you
+ indirect, and avoid the special case? The contents don't matter
+ until you indirect anyway.)
+
+ If we're not doing anything fancy, `enclosing_type' is equal to
+ `type', and `embedded_offset' is zero, so everything works
+ normally. */
+ struct type *enclosing_type;
+ int embedded_offset;
+ int pointed_to_offset;
+
+ /* 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. */
+ struct value *next;
+
+ /* Register number if the value is from a register. */
+ short regnum;
+
+ /* 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).
+
+ WARNING: This field is used by the code which handles watchpoints
+ (see breakpoint.c) to decide whether a particular value can be
+ watched by hardware watchpoints. If the lazy flag is set for
+ some member of a value chain, it is assumed that this member of
+ the chain doesn't need to be watched as part of watching the
+ value itself. This is how GDB avoids watching the entire struct
+ or array when the user wants to watch a single struct member or
+ array element. If you ever change the way lazy flag is set and
+ reset, be sure to consider this use as well! */
+ char lazy;
+
+ /* If nonzero, this is the value of a variable which does not
+ actually exist in the program. */
+ char optimized_out;
+
+ /* Actual contents of the value. For use of this value; setting it
+ uses the stuff above. Not valid if lazy is nonzero. Target
+ byte-order. We force it to be aligned properly for any possible
+ value. Note that a value therefore extends beyond what is
+ declared here. */
+ union
+ {
+ gdb_byte contents[1];
+ DOUBLEST force_doublest_align;
+ LONGEST force_longest_align;
+ CORE_ADDR force_core_addr_align;
+ void *force_pointer_align;
+ } aligner;
+ /* Do not add any new members here -- contents above will trash
+ them. */
+};
+
/* Prototypes for local functions. */
static void show_values (char *, int);
/* Accessor methods. */
+struct value *
+value_next (struct value *value)
+{
+ return value->next;
+}
+
struct type *
value_type (struct value *value)
{
return value->type;
}
+void
+deprecated_set_value_type (struct value *value, struct type *type)
+{
+ value->type = type;
+}
int
value_offset (struct value *value)
{
return value->offset;
}
+void
+set_value_offset (struct value *value, int offset)
+{
+ value->offset = offset;
+}
int
value_bitpos (struct value *value)
{
return value->bitpos;
}
+void
+set_value_bitpos (struct value *value, int bit)
+{
+ value->bitpos = bit;
+}
int
value_bitsize (struct value *value)
{
return value->bitsize;
}
+void
+set_value_bitsize (struct value *value, int bit)
+{
+ value->bitsize = bit;
+}
-bfd_byte *
+gdb_byte *
value_contents_raw (struct value *value)
{
return value->aligner.contents + value->embedded_offset;
}
-bfd_byte *
+gdb_byte *
value_contents_all_raw (struct value *value)
{
return value->aligner.contents;
return value->enclosing_type;
}
-const bfd_byte *
+const gdb_byte *
value_contents_all (struct value *value)
{
if (value->lazy)
value->lazy = val;
}
-const bfd_byte *
+const gdb_byte *
value_contents (struct value *value)
{
return value_contents_writeable (value);
}
-bfd_byte *
+gdb_byte *
value_contents_writeable (struct value *value)
{
if (value->lazy)
return value->aligner.contents;
}
+/* Return non-zero if VAL1 and VAL2 have the same contents. Note that
+ this function is different from value_equal; in C the operator ==
+ can return 0 even if the two values being compared are equal. */
+
+int
+value_contents_equal (struct value *val1, struct value *val2)
+{
+ struct type *type1;
+ struct type *type2;
+ int len;
+
+ type1 = check_typedef (value_type (val1));
+ type2 = check_typedef (value_type (val2));
+ len = TYPE_LENGTH (type1);
+ if (len != TYPE_LENGTH (type2))
+ return 0;
+
+ return (memcmp (value_contents (val1), value_contents (val2), len) == 0);
+}
+
int
value_optimized_out (struct value *value)
{
{
return &value->regnum;
}
+
+int
+deprecated_value_modifiable (struct value *value)
+{
+ return value->modifiable;
+}
+void
+deprecated_set_value_modifiable (struct value *value, int modifiable)
+{
+ value->modifiable = modifiable;
+}
\f
/* Return a mark in the value chain. All values allocated after the
mark is obtained (except for those released) are subject to being freed
if (absnum <= 0)
{
if (num == 0)
- error ("The history is empty.");
+ error (_("The history is empty."));
else if (num == 1)
- error ("There is only one value in the history.");
+ error (_("There is only one value in the history."));
else
- error ("History does not go back to $$%d.", -num);
+ error (_("History does not go back to $$%d."), -num);
}
if (absnum > value_history_count)
- error ("History has not yet reached $%d.", absnum);
+ error (_("History has not yet reached $%d."), absnum);
absnum--;
for (i = num; i < num + 10 && i <= value_history_count; i++)
{
val = access_value_history (i);
- printf_filtered ("$%d = ", i);
+ printf_filtered (("$%d = "), i);
value_print (val, gdb_stdout, 0, Val_pretty_default);
- printf_filtered ("\n");
+ printf_filtered (("\n"));
}
/* The next "info history +" should start after what we just printed. */
return var;
var = (struct internalvar *) xmalloc (sizeof (struct internalvar));
- var->name = concat (name, NULL);
+ var->name = concat (name, (char *)NULL);
var->value = allocate_value (builtin_type_void);
release_value (var->value);
var->next = internalvars;
set_internalvar_component (struct internalvar *var, int offset, int bitpos,
int bitsize, struct value *newval)
{
- bfd_byte *addr = value_contents_writeable (var->value) + offset;
+ gdb_byte *addr = value_contents_writeable (var->value) + offset;
if (bitsize)
modify_field (addr, value_as_long (newval),
{
varseen = 1;
}
- printf_filtered ("$%s = ", var->name);
+ printf_filtered (("$%s = "), var->name);
value_print (var->value, gdb_stdout, 0, Val_pretty_default);
- printf_filtered ("\n");
+ printf_filtered (("\n"));
}
if (!varseen)
- printf_unfiltered ("No debugger convenience variables now defined.\n\
+ printf_unfiltered (_("\
+No debugger convenience variables now defined.\n\
Convenience variables have names starting with \"$\";\n\
-use \"set\" as in \"set $foo = 5\" to define them.\n");
+use \"set\" as in \"set $foo = 5\" to define them.\n"));
}
\f
/* Extract a value as a C number (either long or double).
foo = unpack_double (value_type (val), value_contents (val), &inv);
if (inv)
- error ("Invalid floating value found in program.");
+ error (_("Invalid floating value found in program."));
return foo;
}
/* Extract a value as a C pointer. Does not deallocate the value.
to an INT (or some size). After all, it is only an offset. */
LONGEST
-unpack_long (struct type *type, const char *valaddr)
+unpack_long (struct type *type, const gdb_byte *valaddr)
{
enum type_code code = TYPE_CODE (type);
int len = TYPE_LENGTH (type);
return extract_typed_address (valaddr, type);
case TYPE_CODE_MEMBER:
- error ("not implemented: member types in unpack_long");
+ error (_("not implemented: member types in unpack_long"));
default:
- error ("Value can't be converted to integer.");
+ error (_("Value can't be converted to integer."));
}
return 0; /* Placate lint. */
}
format, result is in host format. */
DOUBLEST
-unpack_double (struct type *type, const char *valaddr, int *invp)
+unpack_double (struct type *type, const gdb_byte *valaddr, int *invp)
{
enum type_code code;
int len;
to an INT (or some size). After all, it is only an offset. */
CORE_ADDR
-unpack_pointer (struct type *type, const char *valaddr)
+unpack_pointer (struct type *type, const gdb_byte *valaddr)
{
/* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
whether we want this to be true eventually. */
/* SYM should never have a SYMBOL_CLASS which will require
read_var_value to use the FRAME parameter. */
if (symbol_read_needs_frame (sym))
- warning ("static field's value depends on the current "
- "frame - bad debug info?");
+ warning (_("static field's value depends on the current "
+ "frame - bad debug info?"));
retval = read_var_value (sym, NULL);
}
if (retval && VALUE_LVAL (retval) == lval_memory)
If the field is signed, we also do sign extension. */
LONGEST
-unpack_field_as_long (struct type *type, const char *valaddr, int fieldno)
+unpack_field_as_long (struct type *type, const gdb_byte *valaddr, int fieldno)
{
ULONGEST val;
ULONGEST valmask;
0 <= BITPOS, where lbits is the size of a LONGEST in bits. */
void
-modify_field (char *addr, LONGEST fieldval, int bitpos, int bitsize)
+modify_field (gdb_byte *addr, LONGEST fieldval, int bitpos, int bitsize)
{
ULONGEST oword;
ULONGEST mask = (ULONGEST) -1 >> (8 * sizeof (ULONGEST) - bitsize);
{
/* FIXME: would like to include fieldval in the message, but
we don't have a sprintf_longest. */
- warning ("Value does not fit in %d bits.", bitsize);
+ warning (_("Value does not fit in %d bits."), bitsize);
/* Truncate it, otherwise adjoining fields may be corrupted. */
fieldval &= mask;
break;
default:
- error ("Unexpected type (%d) encountered for integer constant.", code);
+ error (_("Unexpected type (%d) encountered for integer constant."), code);
}
return val;
}
store_typed_floating (value_contents_raw (val), base_type, num);
}
else
- error ("Unexpected type encountered for floating constant.");
+ error (_("Unexpected type encountered for floating constant."));
return val;
}
enum type_code code = TYPE_CODE (value_type);
if (code == TYPE_CODE_ERROR)
- error ("Function return type unknown.");
+ error (_("Function return type unknown."));
if (code == TYPE_CODE_VOID)
/* A void return value is never in memory. See also corresponding
void
_initialize_values (void)
{
- add_cmd ("convenience", no_class, show_convenience,
- "Debugger convenience (\"$foo\") variables.\n\
+ add_cmd ("convenience", no_class, show_convenience, _("\
+Debugger convenience (\"$foo\") variables.\n\
These variables are created when you assign them values;\n\
-thus, \"print $foo=1\" gives \"$foo\" the value 1. Values may be any type.\n\n\
+thus, \"print $foo=1\" gives \"$foo\" the value 1. Values may be any type.\n\
+\n\
A few convenience variables are given values automatically:\n\
\"$_\"holds the last address examined with \"x\" or \"info lines\",\n\
-\"$__\" holds the contents of the last address examined with \"x\".",
+\"$__\" holds the contents of the last address examined with \"x\"."),
&showlist);
add_cmd ("values", no_class, show_values,
- "Elements of value history around item number IDX (or last ten).",
+ _("Elements of value history around item number IDX (or last ten)."),
&showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff