diff options
author | Song Liu <songliubraving@fb.com> | 2019-01-17 08:15:17 -0800 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-01-21 17:00:57 -0300 |
commit | 9aa0bfa370b278a539077002b3c660468d66b5e7 (patch) | |
tree | c34a24a2b29982f58c7fad1f9d6fc17b881ae1c5 /tools/perf/util/machine.c | |
parent | df063c83aa2c58412ddf533ada9aaf25986120ec (diff) |
perf tools: Handle PERF_RECORD_KSYMBOL
This patch handles PERF_RECORD_KSYMBOL in perf record/report.
Specifically, map and symbol are created for ksymbol register, and
removed for ksymbol unregister.
This patch also sets perf_event_attr.ksymbol properly. The flag is ON by
default.
Committer notes:
Use proper inttypes.h for u64, fixing the build in some environments
like in the android NDK r15c targetting ARM 32-bit.
I.e. fixing this build error:
util/event.c: In function 'perf_event__fprintf_ksymbol':
util/event.c:1489:10: error: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 'u64' [-Werror=format=]
event->ksymbol_event.flags, event->ksymbol_event.name);
^
cc1: all warnings being treated as errors
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-team@fb.com
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20190117161521.1341602-6-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.c')
-rw-r--r-- | tools/perf/util/machine.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 143f7057d581..9bca61c7d5bf 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -681,6 +681,59 @@ int machine__process_switch_event(struct machine *machine __maybe_unused, return 0; } +static int machine__process_ksymbol_register(struct machine *machine, + union perf_event *event, + struct perf_sample *sample __maybe_unused) +{ + struct symbol *sym; + struct map *map; + + map = map_groups__find(&machine->kmaps, event->ksymbol_event.addr); + if (!map) { + map = dso__new_map(event->ksymbol_event.name); + if (!map) + return -ENOMEM; + + map->start = event->ksymbol_event.addr; + map->pgoff = map->start; + map->end = map->start + event->ksymbol_event.len; + map_groups__insert(&machine->kmaps, map); + } + + sym = symbol__new(event->ksymbol_event.addr, event->ksymbol_event.len, + 0, 0, event->ksymbol_event.name); + if (!sym) + return -ENOMEM; + dso__insert_symbol(map->dso, sym); + return 0; +} + +static int machine__process_ksymbol_unregister(struct machine *machine, + union perf_event *event, + struct perf_sample *sample __maybe_unused) +{ + struct map *map; + + map = map_groups__find(&machine->kmaps, event->ksymbol_event.addr); + if (map) + map_groups__remove(&machine->kmaps, map); + + return 0; +} + +int machine__process_ksymbol(struct machine *machine __maybe_unused, + union perf_event *event, + struct perf_sample *sample) +{ + if (dump_trace) + perf_event__fprintf_ksymbol(event, stdout); + + if (event->ksymbol_event.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER) + return machine__process_ksymbol_unregister(machine, event, + sample); + return machine__process_ksymbol_register(machine, event, sample); +} + static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename) { const char *dup_filename; @@ -1812,6 +1865,8 @@ int machine__process_event(struct machine *machine, union perf_event *event, case PERF_RECORD_SWITCH: case PERF_RECORD_SWITCH_CPU_WIDE: ret = machine__process_switch_event(machine, event); break; + case PERF_RECORD_KSYMBOL: + ret = machine__process_ksymbol(machine, event, sample); break; default: ret = -1; break; |