perf_file_header
struct perf_file_header f_header;
f_header = (struct perf_file_header){
data_offset = sizeof(struct perf_file_header);
int perf_file_header__read(struct perf_file_header *header,
mem_bswap_64(header, offsetof(struct perf_file_header,
struct perf_file_header f_header;
int perf_file_header__read(struct perf_file_header *header,