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authorJiri Olsa <jolsa@redhat.com>2014-01-07 13:47:23 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-02-18 13:34:47 +0100
commitb42dc32d4f91e4c0f34b628fdb012eb423da9e69 (patch)
treee55922a9dd9352a2611a02aa4cda74d7875559d8 /tools
parentperf tests x86: Add dwarf unwind test (diff)
downloadlinux-b42dc32d4f91e4c0f34b628fdb012eb423da9e69.tar.xz
linux-b42dc32d4f91e4c0f34b628fdb012eb423da9e69.zip
perf tools: Fix dwarf unwind max_stack processing
The 'unwind__get_entries' function currently returns 'max_stack + 1' entries (instead of exact max_stack entries), because max_stack value does not get decremented for the first entry. This fix makes dwarf-unwind test pass. 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/1389098853-14466-7-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/unwind.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
index 742f23bf35ff..bff3209305e1 100644
--- a/tools/perf/util/unwind.c
+++ b/tools/perf/util/unwind.c
@@ -595,5 +595,5 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
if (ret)
return -ENOMEM;
- return get_entries(&ui, cb, arg, max_stack);
+ return --max_stack > 0 ? get_entries(&ui, cb, arg, max_stack) : 0;
}