selftests/ftrace: Add syntax error test for immediates

Add syntax error test cases for immediate value and
immediate string.

Link: http://lkml.kernel.org/r/156095693553.28024.7730929892585591691.stgit@devnote2Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc

@@ -41,6 +41,11 @@ check_error 'p vfs_read ^%none_reg'	# BAD_REG_NAME
 check_error 'p vfs_read ^@12345678abcde'	# BAD_MEM_ADDR
 check_error 'p vfs_read ^@+10'		# FILE_ON_KPROBE
 
+grep -q "imm-value" README && \
+check_error 'p vfs_read arg1=\^x'	# BAD_IMM
+grep -q "imm-string" README && \
+check_error 'p vfs_read arg1=\"abcd^'	# IMMSTR_NO_CLOSE
+
 check_error 'p vfs_read ^+0@0)'		# DEREF_NEED_BRACE
 check_error 'p vfs_read ^+0ab1(@0)'	# BAD_DEREF_OFFS
 check_error 'p vfs_read +0(+0(@0^)'	# DEREF_OPEN_BRACE