strace stacktrace: offsets printed

[Thomas De Schampheleire]

Hi Masatake,

On Thu, Oct 30, 2014 at 6:19 PM, Masatake YAMATO <yamato at redhat.com> wrote:
> Sorry to be late to reply.
>
> Could you look at print_stack_frame in undwind.c?
>
>     static int
>     print_stack_frame(struct tcb *tcp,
>                       call_action_fn call_action,
>                       error_action_fn error_action,
>                       void *data,
>                       unw_cursor_t *cursor,
>                       char **symbol_name,
>                       size_t *symbol_name_size)
>     {
>             ...
>                         true_offset = ip - cur_mmap_cache->start_addr +
>                                 cur_mmap_cache->mmap_offset;
>                         call_action(data,
>                                     cur_mmap_cache->binary_filename,
>                                     *symbol_name,
>                                     function_offset,
>                                     true_offset);
>             ...
>
>
> Do you mean you want strace to print the value of 'ip' in stead of true_offset?

Yes indeed, I find it more logical to print the value obtained from
libunwind directly.
If you also prefer the other value, then maybe we can print both?

Thanks,
Thomas