Fail fibonacci test on nOS-V kernel warnings

Some threads may fail to enable the kernel instrumentation by reaching
the memory lock limit, causing the kernel instrumentation to be disabled
without any error in the emulation.

To prevent this situation, we run the test manually and check that there
are no warnings during the execution.

test/rt/nodes/CMakeLists.txt

@@ -61,7 +61,7 @@ nodes_rt_test(taskiter.c SORT)
 include(CheckPerfParanoid)
 if (PERF_PARANOID_KERNEL)
   message(STATUS "Enabling perf paranoid tests for NODES")
-  nodes_rt_test(fibonacci.c SORT LEVEL 3)
+  nodes_rt_test(fibonacci.c SORT LEVEL 3 DRIVER "fibonacci.driver.sh")
 elseif(ENABLE_ALL_TESTS)
   message(FATAL_ERROR "Cannot enable perf paranoid tests for NODES")
 else()

test/rt/nodes/fibonacci.driver.sh

@@ -0,0 +1,19 @@
+target=$OVNI_TEST_BIN
+
+$target 2>stderr.log
+
+# Ensure no nOS-V warnings at runtime
+if grep -c "cannot enable kernel events" stderr.log; then
+  echo "cannot enable kernel events in all threads" >&2
+  exit 1
+fi
+
+# We need to sort the trace as it has unsorted regions
+ovnisort ovni
+
+# Ensure we have at least a pair of kernel CS events
+ovnitop ovni | grep KCO
+ovnitop ovni | grep KCI
+
+# Run the emulator
+ovniemu -l ovni