linux/tools/perf/util/bpf-event.h
Song Liu f8dfeae009 perf bpf: Show more BPF program info in print_bpf_prog_info()
This patch enables showing bpf program name, address, and size in the
header.

Before the patch:

  perf report --header-only
  ...
  # bpf_prog_info of id 9
  # bpf_prog_info of id 10
  # bpf_prog_info of id 13

After the patch:

  # bpf_prog_info 9: bpf_prog_7be49e3934a125ba addr 0xffffffffa0024947 size 229
  # bpf_prog_info 10: bpf_prog_2a142ef67aaad174 addr 0xffffffffa007c94d size 229
  # bpf_prog_info 13: bpf_prog_47368425825d7384_task__task_newt addr 0xffffffffa0251137 size 369

Committer notes:

Fix the fallback definition when HAVE_LIBBPF_SUPPORT is not defined,
i.e. add the missing 'static inline' and add the __maybe_unused to the
args. Also add stdio.h since we now use FILE * in bpf-event.h.

Signed-off-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190319165454.1298742-3-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-21 11:27:04 -03:00

75 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_BPF_EVENT_H
#define __PERF_BPF_EVENT_H
#include <linux/compiler.h>
#include <linux/rbtree.h>
#include <pthread.h>
#include <api/fd/array.h>
#include "event.h"
#include <stdio.h>
struct machine;
union perf_event;
struct perf_env;
struct perf_sample;
struct record_opts;
struct evlist;
struct target;
struct bpf_prog_info_node {
struct bpf_prog_info_linear *info_linear;
struct rb_node rb_node;
};
struct btf_node {
struct rb_node rb_node;
u32 id;
u32 data_size;
char data[];
};
#ifdef HAVE_LIBBPF_SUPPORT
int machine__process_bpf_event(struct machine *machine, union perf_event *event,
struct perf_sample *sample);
int perf_event__synthesize_bpf_events(struct perf_session *session,
perf_event__handler_t process,
struct machine *machine,
struct record_opts *opts);
int bpf_event__add_sb_event(struct perf_evlist **evlist,
struct perf_env *env);
void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info,
struct perf_env *env,
FILE *fp);
#else
static inline int machine__process_bpf_event(struct machine *machine __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused)
{
return 0;
}
static inline int perf_event__synthesize_bpf_events(struct perf_session *session __maybe_unused,
perf_event__handler_t process __maybe_unused,
struct machine *machine __maybe_unused,
struct record_opts *opts __maybe_unused)
{
return 0;
}
static inline int bpf_event__add_sb_event(struct perf_evlist **evlist __maybe_unused,
struct perf_env *env __maybe_unused)
{
return 0;
}
static inline void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info __maybe_unused,
struct perf_env *env __maybe_unused,
FILE *fp __maybe_unused)
{
}
#endif // HAVE_LIBBPF_SUPPORT
#endif