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    SubjectRe: [PATCH v5 perf,bpf 13/15] perf, bpf: process PERF_BPF_EVENT_PROG_LOAD for annotation
    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 <songliubraving@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
    >

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