cpu_profiler: fix asok command crash

fixes: https://tracker.ceph.com/issues/50814
Signed-off-by: liu shi <liu.shi@navercorp.com>
(cherry picked from commit be7303aafe34ae470d2fd74440c3a8d51fcfa3ff)

diff --git a/src/perfglue/cpu_profiler.cc b/src/perfglue/cpu_profiler.cc
index ea1be7e959596daa6321c98f527d0b621a08115c..81f2ccf8c9f664fa27ad3b250e3db8dff3c2fc20 100644 (file)
--- a/src/perfglue/cpu_profiler.cc
+++ b/src/perfglue/cpu_profiler.cc
@@ -22,7 +22,7 @@
 void cpu_profiler_handle_command(const std::vector<std::string> &cmd,
                                 std::ostream& out)
 {
-  if (cmd[1] == "status") {
+  if (cmd.size() == 1 && cmd[0] == "status") {
     ProfilerState st;
     ProfilerGetCurrentState(&st);
     out << "cpu_profiler " << (st.enabled ? "enabled":"not enabled")
@@ -30,7 +30,7 @@ void cpu_profiler_handle_command(const std::vector<std::string> &cmd,
        << " profile_name " << st.profile_name
        << " samples " << st.samples_gathered;
   }
-  else if (cmd[1] == "flush") {
+  else if (cmd.size() == 1 && cmd[0] == "flush") {
     ProfilerFlush();
     out << "cpu_profiler: flushed";
   }