[PATCH -tip v2 3/6] perf script: resolve DSOs and symbols for user-space

Akihiro Nagai
2011-07-17T09:30:26Z

Resolve user-space DSOs and symbols.
Latest perf-script can resolve DSOs and symbols for only kernel
and kernel modules. This patch resolves them for other
executable binaries.

# perf script -f ip,addr,sym,dso
3f03e016b0 ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e016b0 ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04b80 3f03e016b3 _start (/lib64/ld-2.14.so)
3f03e04b80 ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04ba6 ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04bad ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04c1d 3f03e04bfb _dl_start (/lib64/ld-2.14.so)
3f03e04c00 3f03e04c21 _dl_start (/lib64/ld-2.14.so)
3f03e04c00 3f03e04c21 _dl_start (/lib64/ld-2.14.so)
[snip]

Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---

tools/perf/builtin-script.c | 4 ++++
tools/perf/util/event.c | 5 +++++
2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b3e0951..2356198 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -328,6 +328,10 @@ static void print_sample_addr(union perf_event *event,

thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
event->ip.pid, sample->addr, &al);
+ /* try to resolve for user space */
+ if (!al.map)
+ thread__find_addr_map(thread, session, PERF_RECORD_MISC_USER,
+ MAP__FUNCTION, event->ip.pid, sample->addr, &al);
if (!al.map)
thread__find_addr_map(thread, session, cpumode, MAP__VARIABLE,
event->ip.pid, sample->addr, &al);
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 3c1b8a6..49a9315 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -771,6 +771,11 @@ int perf_event__preprocess_sample(const union perf_event *event,

thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
event->ip.pid, event->ip.ip, al);
+ /* try to resolve for user space */
+ if (!al->map)
+ thread__find_addr_map(thread, session, PERF_RECORD_MISC_USER,
+ MAP__FUNCTION, event->ip.pid, event->ip.ip, al);
+
dump_printf(" ...... dso: %s\n",
al->map ? al->map->dso->long_name :
al->level == 'H' ? "[hypervisor]" : "<not found>");