Commit-ID: 92bbe8d834d293c4db7a70fd53884ec1c95d61dc Gitweb: https://git.kernel.org/tip/92bbe8d834d293c4db7a70fd53884ec1c95d61dc Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Mon, 6 Aug 2018 09:53:35 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 8 Aug 2018 15:55:56 -0300
perf bpf: Generalize bpf__setup_stdout() We will use it to set up other bpf-output events, for instance to generate augmented syscall entry tracepoints with pointer contents. Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Wang Nan <wangn...@huawei.com> Link: https://lkml.kernel.org/n/tip-4r7kw0nsyi4vyz6xm1tzx...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/bpf-loader.c | 26 +++++++++++++++++--------- tools/perf/util/bpf-loader.h | 7 +++++++ 2 files changed, 24 insertions(+), 9 deletions(-) diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index e864a7e0ff12..95a27bb6f1a1 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -1535,10 +1535,7 @@ int bpf__apply_obj_config(void) (strcmp(name, \ bpf_map__name(pos)) == 0)) -#define bpf__for_each_stdout_map(pos, obj, objtmp) \ - bpf__for_each_map_named(pos, obj, objtmp, "__bpf_stdout__") - -int bpf__setup_stdout(struct perf_evlist *evlist) +int bpf__setup_output_event(struct perf_evlist *evlist, const char *name) { struct bpf_map_priv *tmpl_priv = NULL; struct bpf_object *obj, *tmp; @@ -1547,7 +1544,7 @@ int bpf__setup_stdout(struct perf_evlist *evlist) int err; bool need_init = false; - bpf__for_each_stdout_map(map, obj, tmp) { + bpf__for_each_map_named(map, obj, tmp, name) { struct bpf_map_priv *priv = bpf_map__priv(map); if (IS_ERR(priv)) @@ -1567,17 +1564,23 @@ int bpf__setup_stdout(struct perf_evlist *evlist) return 0; if (!tmpl_priv) { - err = parse_events(evlist, "bpf-output/no-inherit=1,name=__bpf_stdout__/", - NULL); + char *event_definition = NULL; + + if (asprintf(&event_definition, "bpf-output/no-inherit=1,name=%s/", name) < 0) + return -ENOMEM; + + err = parse_events(evlist, event_definition, NULL); + free(event_definition); + if (err) { - pr_debug("ERROR: failed to create bpf-output event\n"); + pr_debug("ERROR: failed to create the \"%s\" bpf-output event\n", name); return -err; } evsel = perf_evlist__last(evlist); } - bpf__for_each_stdout_map(map, obj, tmp) { + bpf__for_each_map_named(map, obj, tmp, name) { struct bpf_map_priv *priv = bpf_map__priv(map); if (IS_ERR(priv)) @@ -1609,6 +1612,11 @@ int bpf__setup_stdout(struct perf_evlist *evlist) return 0; } +int bpf__setup_stdout(struct perf_evlist *evlist) +{ + return bpf__setup_output_event(evlist, "__bpf_stdout__"); +} + #define ERRNO_OFFSET(e) ((e) - __BPF_LOADER_ERRNO__START) #define ERRCODE_OFFSET(c) ERRNO_OFFSET(BPF_LOADER_ERRNO__##c) #define NR_ERRNO (__BPF_LOADER_ERRNO__END - __BPF_LOADER_ERRNO__START) diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h index 5d3aefd6fae7..6be0eec043c6 100644 --- a/tools/perf/util/bpf-loader.h +++ b/tools/perf/util/bpf-loader.h @@ -82,6 +82,7 @@ int bpf__apply_obj_config(void); int bpf__strerror_apply_obj_config(int err, char *buf, size_t size); int bpf__setup_stdout(struct perf_evlist *evlist); +int bpf__setup_output_event(struct perf_evlist *evlist, const char *name); int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err, char *buf, size_t size); @@ -138,6 +139,12 @@ bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused) return 0; } +static inline int +bpf__setup_output_event(struct perf_evlist *evlist __maybe_unused, const char *name __maybe_unused) +{ + return 0; +} + static inline int __bpf_strerror(char *buf, size_t size) {
