[PATCH 4/4] tracing: Add new testcases for hist trigger parsing errors

[Tom Zanussi]

Add a testcase ensuring that the tracing error_log correctly displays
hist trigger parsing errors.

Signed-off-by: Tom Zanussi <zanu...@kernel.org>
---
 .../test.d/trigger/trigger-hist-syntax-errors.tc   | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 
tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-syntax-errors.tc

diff --git 
a/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-syntax-errors.tc 
b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-syntax-errors.tc
new file mode 100644
index 000000000000..d44087a2f3d1
--- /dev/null
+++ 
b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-syntax-errors.tc
@@ -0,0 +1,32 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: event trigger - test histogram parser errors
+
+if [ ! -f set_event -o ! -d events/kmem ]; then
+    echo "event tracing is not supported"
+    exit_unsupported
+fi
+
+if [ ! -f events/kmem/kmalloc/trigger ]; then
+    echo "event trigger is not supported"
+    exit_unsupported
+fi
+
+if [ ! -f events/kmem/kmalloc/hist ]; then
+    echo "hist trigger is not supported"
+    exit_unsupported
+fi
+
+[ -f error_log ] || exit_unsupported
+
+check_error() { # command-with-error-pos-by-^
+    ftrace_errlog_check 'hist:kmem:kmalloc' "$1" 'events/kmem/kmalloc/trigger'
+}
+
+check_error 'hist:keys=common_pid:vals=bytes_req:sort=common_pid,^junk'        
# INVALID_SORT_FIELD
+check_error 'hist:keys=common_pid:vals=bytes_req:^sort='               # 
EMPTY_ASSIGNMENT
+check_error 'hist:keys=common_pid:vals=bytes_req:^sort=common_pid,'    # 
EMPTY_SORT_FIELD
+check_error 'hist:keys=common_pid:vals=bytes_req:sort=common_pid.^junk'        
# INVALID_SORT_MODIFIER
+check_error 
'hist:keys=common_pid:vals=bytes_req,bytes_alloc:^sort=common_pid,bytes_req,bytes_alloc'
   # TOO_MANY_SORT_FIELDS
+
+exit 0
-- 
2.14.1