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| author |   Song Liu <songliubraving@fb.com> | 2019-03-11 22:30:44 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-19 16:52:07 -0300 |
| commit | 3792cb2ff43b1b193136a03ce1336462a827d792 (patch) | |
| tree | 264a653ee28353181a73b2a226b26769277445a6 /tools/perf/util/bpf-event.c | |
| parent | perf bpf: Save bpf_prog_info information as headers to perf.data (diff) | |
| download | linux-dev-3792cb2ff43b1b193136a03ce1336462a827d792.tar.xz linux-dev-3792cb2ff43b1b193136a03ce1336462a827d792.zip | |
perf bpf: Save BTF in a rbtree in perf_env
BTF contains information necessary to annotate BPF programs. This patch
saves BTF for BPF programs loaded in the system.
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/20190312053051.2690567-9-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/bpf-event.c')
| -rw-r--r-- | tools/perf/util/bpf-event.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c index 37ee4e2a728a..a4fc52b4ffae 100644 --- a/tools/perf/util/bpf-event.c +++ b/tools/perf/util/bpf-event.c @@ -34,6 +34,28 @@ int machine__process_bpf_event(struct machine *machine __maybe_unused, return 0; } +static int perf_env__fetch_btf(struct perf_env *env, + u32 btf_id, + struct btf *btf) +{ + struct btf_node *node; + u32 data_size; + const void *data; + + data = btf__get_raw_data(btf, &data_size); + + node = malloc(data_size + sizeof(struct btf_node)); + if (!node) + return -1; + + node->id = btf_id; + node->data_size = data_size; + memcpy(node->data, data, data_size); + + perf_env__insert_btf(env, node); + return 0; +} + /* * Synthesize PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT for one bpf * program. One PERF_RECORD_BPF_EVENT is generated for the program. And @@ -113,6 +135,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_session *session, goto out; } has_btf = true; + perf_env__fetch_btf(env, info->btf_id, btf); } /* Synthesize PERF_RECORD_KSYMBOL */ |