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SubjectRe: [PATCH v5 perf,bpf 12/15] perf, bpf: enable annotation of bpf program
On Wed, Feb 27, 2019 at 09:06:40PM -0800, Song Liu wrote:

SNIP

> +
> + disassemble_init_for_target(&info);
> +
> +#ifdef DISASM_FOUR_ARGS_SIGNATURE
> + disassemble = disassembler(info.arch,
> + bfd_big_endian(bfdf),
> + info.mach,
> + bfdf);
> +#else
> + disassemble = disassembler(bfdf);
> +#endif
> + assert(disassemble);
> +
> + fflush(s);

what's the reason for those fflush calls?

thanks,
jirka

> + do {
> + const struct bpf_line_info *linfo = NULL;
> + struct disasm_line *dl;
> + size_t prev_buf_size;
> + const char *srcline;
> + u64 addr;
> +
> + addr = pc + ((u64 *)(info_linear->info.jited_ksyms))[sub_id];
> + count = disassemble(pc, &info);
> +
> + if (prog_linfo)
> + linfo = bpf_prog_linfo__lfind_addr_func(prog_linfo,
> + addr, sub_id,
> + nr_skip);
> +
> + if (linfo && btf) {
> + srcline = btf__name_by_offset(btf, linfo->line_off);
> + nr_skip++;
> + } else
> + srcline = NULL;
> +
> + fprintf(s, "\n");
> + prev_buf_size = buf_size;
> + fflush(s);

SNIP

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