Re: [PATCH] gdb: Check DW_OP_deref_type size against type

[Tom Tromey <tom@tromey.com>]

>>>>> Jielun Wu <firmiana402@gmail.com> writes:

> DWARF v5 requires the explicit size operand of DW_OP_deref_type to
> match the size of the referenced base type.  The evaluator currently
> passes both sizes to dwarf_expr_context::deref without validating the
> encoding, and the generic dereference helper accepts the mismatch by
> zero-extending the bytes read from memory.

> Reject a mismatch after resolving the base type.  Add a DWARF assembler
> test covering both DW_OP_deref_type and DW_OP_GNU_deref_type.

> Tested on x86_64-linux.

I think we're going to need copyright assignments in order to merge this
and the other patches.

You can email 'assign@gnu.org' to get started.

Tom