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Subject[PATCH 07/21] perf tools: Don't try to lookup objdump for live mode
Date
From: Namhyung Kim <namhyung.kim@lge.com>

Arnaldo reported that annotation during perf top resulted in a segfault.
It was because the env->arch was NULL and we don't set it for a live
session. In fact, no need to look up objdump in this case since we can
use system's default (native) objdump.

Reported-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Irina Tirdea <irina.tirdea@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1352251815-12615-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/common.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c
index 5683529..3e975cb 100644
--- a/tools/perf/arch/common.c
+++ b/tools/perf/arch/common.c
@@ -199,6 +199,13 @@ out_error:

int perf_session_env__lookup_objdump(struct perf_session_env *env)
{
+ /*
+ * For live mode, env->arch will be NULL and we can use
+ * the native objdump tool.
+ */
+ if (env->arch == NULL)
+ return 0;
+
return perf_session_env__lookup_binutils_path(env, "objdump",
&objdump_path);
}
--
1.7.9.2.358.g22243


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