Re: [PATCH] perf: make perf.data more self-descriptive (v8)

[Robert Richter <robert.richter@amd.com>]

On 30.09.11 09:40:40, Stephane Eranian wrote:
> @@ -385,36 +1433,69 @@ static int perf_header__adds_write(struct perf_header *header,
>         sec_start = header->data_offset + header->data_size;
>         lseek(fd, sec_start + sec_size, SEEK_SET);
> 
> -       if (perf_header__has_feat(header, HEADER_TRACE_INFO)) {
> -               struct perf_file_section *trace_sec;
> -
> -               trace_sec = &feat_sec[idx++];
> +       err = do_write_feat(fd, header, HEADER_TRACE_INFO, &p, evlist);
> +       if (err)
> +               goto out_free;
> 
> -               /* Write trace info */
> -               trace_sec->offset = lseek(fd, 0, SEEK_CUR);
> -               read_tracing_data(fd, &evlist->entries);
> -               trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
> +       err = do_write_feat(fd, header, HEADER_BUILD_ID, &p, evlist);
> +       if (err) {
> +               perf_header__clear_feat(header, HEADER_BUILD_ID);
> +               goto out_free;
>         }

Stephane,

I am just looking at the code and got a question:

Is there a reason for the different error handling for
HEADER_TRACE_INFO and HEADER_BUILD_ID? All other types simply disable
the feature and go on without returning an error (goto out_free).

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center