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Subject[tip:perf/core] perf callchain: Do not report zero address in unwind
Commit-ID:  1cf0382af98f6365b01b59453fe18dffe3c73d2f
Gitweb: http://git.kernel.org/tip/1cf0382af98f6365b01b59453fe18dffe3c73d2f
Author: Jiri Olsa <jolsa@redhat.com>
AuthorDate: Tue, 7 Jan 2014 13:47:24 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 18 Feb 2014 09:34:48 -0300

perf callchain: Do not report zero address in unwind

We are not interested in zero addresses in callchain, do not report
them.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Jean Pihet <jean.pihet@linaro.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-8-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/unwind.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
index bff3209..3b70181 100644
--- a/tools/perf/util/unwind.c
+++ b/tools/perf/util/unwind.c
@@ -563,7 +563,7 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
unw_word_t ip;

unw_get_reg(&c, UNW_REG_IP, &ip);
- ret = entry(ip, ui->thread, ui->machine, cb, arg);
+ ret = ip ? entry(ip, ui->thread, ui->machine, cb, arg) : 0;
}

unw_destroy_addr_space(addr_space);

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