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address size can be different from DW_OP_deref size

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gdb/ChangeLog:

        * dwarf2expr.c (execute_stack_op) [DW_OP_deref]: Handle
        the case where ADDR_SIZE is different from TYPE_LENGTH (type).
This commit is contained in:
Joel Brobecker
2011-06-03 17:42:24 +00:00
parent 164a5cb7bd
commit 325663dcd2
2 changed files with 18 additions and 0 deletions
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13
gdb/dwarf2expr.c
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@ -877,6 +877,19 @@ execute_stack_op (struct dwarf_expr_context *ctx,
type = address_type;
(ctx->read_mem) (ctx->baton, buf, addr, addr_size);
/* If the size of the object read from memory is different
from the type length, we need to zero-extend it. */
if (TYPE_LENGTH (type) != addr_size)
{
ULONGEST result =
extract_unsigned_integer (buf, addr_size, byte_order);
buf = alloca (TYPE_LENGTH (type));
store_unsigned_integer (buf, TYPE_LENGTH (type),
byte_order, result);
}
result_val = value_from_contents_and_address (type, buf, addr);
break;
}