On Tue, Mar 03, 2015 at 12:07:20PM +0900, Namhyung Kim wrote:
SNIP
> +static int record__merge_index_files(struct record *rec, int nr_index)
> +{
> + int i;
> + int ret = -1;
> + u64 offset;
> + char path[PATH_MAX];
> + struct perf_file_section *idx;
> + struct perf_data_file *file = &rec->file;
> + struct perf_session *session = rec->session;
> + int output_fd = perf_data_file__fd(file);
> +
> + /* +1 for header file itself */
> + nr_index++;
> +
> + idx = calloc(nr_index, sizeof(*idx));
> + if (idx == NULL)
> + goto out_close;
> +
> + offset = lseek(output_fd, 0, SEEK_END);
> +
> + idx[0].offset = session->header.data_offset;
> + idx[0].size = offset - idx[0].offset;
> +
> + for (i = 1; i < nr_index; i++) {
> + struct stat stbuf;
> + int fd = rec->fds[i];
> +
> + if (fstat(fd, &stbuf) < 0)
> + goto out_close;
> +
> + idx[i].offset = offset;
> + idx[i].size = stbuf.st_size;
> +
> + offset += stbuf.st_size;
> + }
> +
> + /* copy sample events */
> + for (i = 1; i < nr_index; i++) {
> + int fd = rec->fds[i];
> +
> + if (idx[i].size == 0)
> + continue;
> +
> + if (copyfile_offset(fd, 0, output_fd, idx[i].offset,
> + idx[i].size) < 0)
> + goto out_close;
> + }
why not do the copy in previous loop as well?
jirka
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