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Subject[PATCH 33/44] perf annotate: Add function header to --stdio2
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

# perf annotate --stdio2 _raw_spin_lock_irqsave
_raw_spin_lock_irqsave() /lib/modules/4.16.0-rc4/build/vmlinux
Event: anon group { cycles, instructions }

0.00 3.17 → callq __fentry__
0.00 7.94 push %rbx
7.69 36.51 → callq __page_file_index
mov %rax,%rbx
7.69 3.17 → callq *ffffffff82225cd0
xor %eax,%eax
mov $0x1,%edx
80.77 49.21 lock cmpxchg %edx,(%rdi)
test %eax,%eax
↓ jne 2b
3.85 0.00 mov %rbx,%rax
pop %rbx
← retq
2b: mov %eax,%esi
→ callq queued_spin_lock_slowpath
mov %rbx,%rax
pop %rbx
← retq
#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-i86yfyzl8m194ioxgj1jo32f@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/annotate.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index ea83b9754ab0..7a6a85f9fea6 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -2244,6 +2244,8 @@ int symbol__tty_annotate2(struct symbol *sym, struct map *map,
struct dso *dso = map->dso;
struct rb_root source_line = RB_ROOT;
struct annotation_options opts = annotation__default_options;
+ const char *ev_name = perf_evsel__name(evsel);
+ char buf[1024];

if (symbol__annotate2(sym, map, evsel, &opts, NULL) < 0)
return -1;
@@ -2254,6 +2256,12 @@ int symbol__tty_annotate2(struct symbol *sym, struct map *map,
print_summary(&source_line, dso->long_name);
}

+ if (perf_evsel__is_group_event(evsel)) {
+ perf_evsel__group_desc(evsel, buf, sizeof(buf));
+ ev_name = buf;
+ }
+
+ fprintf(stdout, "%s() %s\nEvent: %s\n\n", sym->name, dso->long_name, ev_name);
symbol__annotate_fprintf2(sym, stdout);

annotated_source__purge(symbol__annotation(sym)->src);
--
2.14.3
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