Mark Mitchell wrote:
Are
you going through the stor_layout.c:place_field routines when creating
structure types? If so, I wouldn't; here, you know where stuff is
supposed to go, so I would just put it there, and set DECL_FIELD_OFFSET,
etc., accordingly.
No, I'm not using the fancy stor_layout.c stuff. As you say, I already have the
bit offsets. Also, the DWARF representation doesn't necessarily include all the
bits of information that the layout algorithm uses, so it can't reliably
reproduce the same layout just given the types and sizes of (possibly only some
of) the fields.
Anyway, I've made a little more progress; Google pointed me at some past
discussion of this issue and from there a mention that the Ada front end allows
explicit placement of fields in a record, and I was able to swipe that bit of
code. I've got non-bitfields to work properly, but I'm still working on
debugging the bitfield case.
-Sandra
- Re: representation of struct field offsets Sandra Loosemore