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Make some lval_funcs methods to default on NULL.
	* valops.c (value_fetch_lazy): Check if lval_computed read method is
	NULL.
	(value_assign): Check if lval_computed write method is NULL.
	* value.h (struct lval_funcs): Comment NULL values for read and write
	methods.
This commit is contained in:
Jan Kratochvil 2011-10-09 19:36:06 +00:00
parent e18b27534c
commit ac71a68c85
3 changed files with 21 additions and 5 deletions
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9
gdb/ChangeLog
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@ -1,3 +1,12 @@
2011-10-09 Jan Kratochvil <jan.kratochvil@redhat.com>
Make some lval_funcs methods to default on NULL.
* valops.c (value_fetch_lazy): Check if lval_computed read method is
NULL.
(value_assign): Check if lval_computed write method is NULL.
* value.h (struct lval_funcs): Comment NULL values for read and write
methods.
2011-10-09 Jan Kratochvil <jan.kratochvil@redhat.com>
Display @entry parameter values (without references).

9
gdb/valops.c
View file

@ -1110,7 +1110,8 @@ value_fetch_lazy (struct value *val)
watchpoints from trying to watch the saved frame pointer. */
value_free_to_mark (mark);
}
else if (VALUE_LVAL (val) == lval_computed)
else if (VALUE_LVAL (val) == lval_computed
&& value_computed_funcs (val)->read != NULL)
value_computed_funcs (val)->read (val);
else if (value_optimized_out (val))
/* Keep it optimized out. */;
@ -1381,9 +1382,13 @@ value_assign (struct value *toval, struct value *fromval)
{
const struct lval_funcs *funcs = value_computed_funcs (toval);
if (funcs->write != NULL)
{
funcs->write (toval, fromval);
}
break;
}
}
/* Fall through. */
default:
error (_("Left operand of assignment is not an lvalue."));

6
gdb/value.h
View file

@ -156,13 +156,15 @@ 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'. */
call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
non-optimized-out value is an internal 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'. */
should call 'error'. If it is NULL such TOVAL assignment is an error as
TOVAL is not considered as an lvalue. */
void (*write) (struct value *toval, struct value *fromval);
/* Check the validity of some bits in VALUE. This should return 1