[RFC][PATCH] selftests: ftrace: Allow some tests to be run in a tracing instance

[Steven Rostedt]

An tracing instance has several of the same capabilities as the top level
instance, but may be implemented slightly different. Instead of just writing
tests that duplicat the same test cases of the top level instance, allow a
test to be written for both the top level as well as for an instance.

If a test case can be run in both the top level as well as in an tracing
instance directory, then it should have a ".itc" extension instead of just
the ".tc" extension.

Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
 tools/testing/selftests/ftrace/ftracetest | 41 ++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
index a8631d9..889ec67 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -40,7 +40,11 @@ abspath() {
 }
 
 find_testcases() { #directory
-  echo `find $1 -name \*.tc | sort`
+  echo `find $1 -name \*.tc -o -name \*.itc | sort`
+}
+
+find_instance_testcases() { #directory
+  echo `find $1 -name \*.itc | sort`
 }
 
 parse_opts() { # opts
@@ -69,7 +73,7 @@ parse_opts() { # opts
       LOG_DIR=$2
       shift 2
     ;;
-    *.tc)
+    *.tc|*.itc)
       if [ -f "$1" ]; then
         OPT_TEST_CASES="$OPT_TEST_CASES `abspath $1`"
         shift 1
@@ -233,18 +237,28 @@ exit_xfail () {
 }
 trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL
 
+INSTANCE_DIR="."
 __run_test() { # testfile
   # setup PID and PPID, $$ is not updated.
-  (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1)
+  (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; cd $INSTANCE_DIR; . $1)
   [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
 }
 
 # Run one test case
-run_test() { # testfile
+run_test() { # [-i] testfile
+  local makeinstance=0
+  if [ $1 == "-i" ]; then
+    makeinstance=1
+    shift
+  fi
   local testname=`basename $1`
   local testlog=`mktemp $LOG_DIR/${testname}-log.XXXXXX`
   export TMPDIR=`mktemp -d /tmp/ftracetest-dir.XXXXXX`
   testcase $1
+  if [ $makeinstance -eq 1 ]; then
+    INSTANCE_DIR=$TRACING_DIR/instances/${testname}_test
+    mkdir $INSTANCE_DIR
+  fi
   echo "execute: "$1 > $testlog
   SIG_RESULT=0
   if [ $VERBOSE -ge 2 ]; then
@@ -260,17 +274,36 @@ run_test() { # testfile
     [ $VERBOSE -ge 1 ] && catlog $testlog
     TOTAL_RESULT=1
   fi
+  if [ $makeinstance -eq 1 ]; then
+    rmdir $INSTANCE_DIR
+    INSTANCE_DIR="."
+  fi
   rm -rf $TMPDIR
 }
 
 # load in the helper functions
 . $TEST_DIR/functions
 
+RUN_INSTANCES=0
+
 # Main loop
 for t in $TEST_CASES; do
+  if [ "${t/*./}" == "itc" ]; then
+    RUN_INSTANCES=1
+  fi
   run_test $t
 done
 
+if [ $RUN_INSTANCES -eq 1 ]; then
+    echo "Running tests in an tracing instance:"
+    for t in $TEST_CASES; do
+	if [ "${t/*./}" != "itc" ]; then
+	    continue
+	fi
+	run_test -i $t
+    done
+fi
+
 prlog ""
 prlog "# of passed: " `echo $PASSED_CASES | wc -w`
 prlog "# of failed: " `echo $FAILED_CASES | wc -w`
-- 
2.9.3