[PATCH -tip v3 3/5] perf script: enhance IP and ADDR correlatedetection for BTS

[Akihiro Nagai]

BTS records branch_from_addr and branch_to_addr in IP and ADDR field in perf_sample.
This patch detects this correlation in perf-script.

# perf script -f ip,addr,dso,sym
3f03e016b0    _start (/lib64/ld-2.14.so) 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@xxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
---

 tools/perf/builtin-script.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b3312ff..aeec5bc 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;
 }
 

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