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Subject[PATCH -tip v2 4/6] perf script: print DSOs and symbols for BTS branch_from addr
Date
Print DSOs and symbols for branch_from address of BTS.
BTS records branch_from address in 'addr' fields,
and branch_to address in 'ip' field. Latest perf-script
resolves DSOs and symbols only for 'ip' field.
This patch resolves them for 'addr' field too.

# perf script -f ip,addr,dso,sym
3f03e016b0 (unknown) ([kernel.kallsyms]) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e016b0 _start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04b80 _dl_start (/lib64/ld-2.14.so) 3f03e016b3 _start (/lib64/ld-2.14.so)
3f03e04b80 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04ba6 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04bad _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04c1d _dl_start (/lib64/ld-2.14.so) 3f03e04bfb _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 | 8 +++++++-
tools/perf/util/event.c | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 2356198..7708d89 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -309,6 +309,12 @@ static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
(attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
return true;

+ /* BTS Events */
+ if ((attr->type == PERF_TYPE_HARDWARE) &&
+ (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
+ (attr->sample_period == 1))
+ return true;
+
return false;
}

@@ -328,7 +334,7 @@ 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 */
+ /* try to resolve addr_location for user space */
if (!al.map)
thread__find_addr_map(thread, session, PERF_RECORD_MISC_USER,
MAP__FUNCTION, event->ip.pid, sample->addr, &al);
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 49a9315..c541d02 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -771,7 +771,7 @@ 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 */
+ /* try to resolve addr_location 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);


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