On Wed, Feb 27, 2019 at 09:06:41PM -0800, Song Liu wrote:
> This patch adds processing of PERF_BPF_EVENT_PROG_LOAD, which sets proper
> DSO type/id/etc of memory regions mapped to BPF programs to
> DSO_BINARY_TYPE__BPF_PROG_INFO
>
> Signed-off-by: Song Liu <songliubrav...@fb.com>
> ---
> tools/perf/util/bpf-event.c | 53 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 53 insertions(+)
>
> diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
> index 370b830f2433..048ef00371ad 100644
> --- a/tools/perf/util/bpf-event.c
> +++ b/tools/perf/util/bpf-event.c
> @@ -25,12 +25,65 @@ static int snprintf_hex(char *buf, size_t size, unsigned
> char *data, size_t len)
> return ret;
> }
>
> +static int machine__process_bpf_event_load(struct machine *machine
> __maybe_unused,
machine is used
jirka
> + union perf_event *event,
> + struct perf_sample *sample
> __maybe_unused)
> +{
> + struct bpf_prog_info_linear *info_linear;
> + struct bpf_prog_info_node *info_node;
> + struct perf_env *env = machine->env;
> + int id = event->bpf_event.id;
> + unsigned int i;
> +
> + /* perf-record, no need to handle bpf-event */
> + if (env == NULL)
> + return 0;
> +
> + info_node = perf_env__find_bpf_prog_info(env, id);
> + if (!info_node)
> + return 0;
> + info_linear = info_node->info_linear;
> +
> + for (i = 0; i < info_linear->info.nr_jited_ksyms; i++) {
> + u64 *addrs = (u64 *)(info_linear->info.jited_ksyms);
> + u64 addr = addrs[i];
> + struct map *map;
> +
> + map = map_groups__find(&machine->kmaps, addr);
> +
> + if (map) {
> + map->dso->binary_type = DSO_BINARY_TYPE__BPF_PROG_INFO;
> + map->dso->bpf_prog.id = id;
> + map->dso->bpf_prog.sub_id = i;
> + map->dso->bpf_prog.env = env;
> + }
> + }
> + return 0;
> +}
> +
> int machine__process_bpf_event(struct machine *machine __maybe_unused,
> union perf_event *event,
> struct perf_sample *sample __maybe_unused)
> {
> if (dump_trace)
> perf_event__fprintf_bpf_event(event, stdout);
> +
> + switch (event->bpf_event.type) {
> + case PERF_BPF_EVENT_PROG_LOAD:
> + return machine__process_bpf_event_load(machine, event, sample);
> +
> + case PERF_BPF_EVENT_PROG_UNLOAD:
> + /*
> + * Do not free bpf_prog_info and btf of the program here,
> + * as annotation still need them. They will be freed at
> + * the end of the session.
> + */
> + break;
> + default:
> + pr_debug("unexpected bpf_event type of %d\n",
> + event->bpf_event.type);
> + break;
> + }
> return 0;
> }
>
> --
> 2.17.1
>
