Re: typedefs and alignment

[Christopher Li <sparse@chrisli.org>]

On Mon, Feb 8, 2010 at 2:35 AM, Dan Carpenter <error27@gmail.com> wrote:
> I've found an issue handling typedefs and alignment.  In the appended
> code sparse things 'ptr' has to be aligned so the size of 'bar' is 1024.
> I haven't looked at how to fix this at all, I thought I would ask the
> experts for hints first.

Hmm, there is a bug there.

For the simplified code:

typedef struct aligned_struct {
       int a;
}  __attribute__ ((aligned(1024))) ali_t;

ali_t *ppr;

running test-parsing will show:

.align 1024
struct aligned_struct [usertype] *[addressable] [toplevel] ppr

I am looking at it right now.

Chris



>
> regards,
> dan carpenter
>
> #include <stdio.h>
>
> typedef struct aligned_struct {
>        int a;
> }  __attribute__ ((aligned(1024))) ali_t;
>
> struct foo {
>        int b;
>        ali_t *ptr;
> };

It does look wrong. The easier way to expose it


>
> int mainx(void)
> {
>        struct foo bar;
>
>        printf("%d\n", sizeof(bar));
>        return 0;
> }
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