linux-kernel - [PATCH v7 8/8] selftests/ftrace: Add funcgraph-retval test case

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Message-Id: <20230324123731.3801920-9-pengdonglin@sangfor.com.cn>
Date:   Fri, 24 Mar 2023 05:37:31 -0700
From:   Donglin Peng <pengdonglin@...gfor.com.cn>
To:     mhiramat@...nel.org, rostedt@...dmis.org, linux@...linux.org.uk,
        mark.rutland@....com, will@...nel.org, catalin.marinas@....com,
        palmer@...belt.com, paul.walmsley@...ive.com, tglx@...utronix.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        chenhuacai@...nel.org, zhangqing@...ngson.cn, kernel@...0n.name,
        mingo@...hat.com, peterz@...radead.org, xiehuan09@...il.com,
        dinghui@...gfor.com.cn, huangcun@...gfor.com.cn,
        dolinux.peng@...il.com
Cc:     linux-trace-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Donglin Peng <pengdonglin@...gfor.com.cn>
Subject: [PATCH v7 8/8] selftests/ftrace: Add funcgraph-retval test case

Add a test case for the funcgraph-retval and funcgraph-retval-hex
trace options.

Signed-off-by: Donglin Peng <pengdonglin@...gfor.com.cn>
---
 .../ftrace/test.d/ftrace/fgraph-retval.tc     | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc

diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc
new file mode 100644
index 000000000000..bee466bef8b2
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc
@@ -0,0 +1,43 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: ftrace - function graph print function return value
+# requires: set_graph_function options/funcgraph-retval options/funcgraph-retval-hex function_graph:tracer
+
+# Make sure that funcgraph-retval works
+
+fail() { # msg
+    echo $1
+    exit_fail
+}
+
+disable_tracing
+clear_trace
+
+echo proc_reg_write > set_graph_function
+echo function_graph > current_tracer
+echo funcgraph-retval > trace_options
+
+enable_tracing
+
+set +e
+echo > /proc/interrupts 2>/dev/null
+set -e
+
+disable_tracing
+
+: "Test printing the error code in signed decimal format"
+echo nofuncgraph-retval-hex > trace_options
+count=`cat trace | grep 'proc_reg_write = -5' | wc -l`
+if [ $count -eq 0 ]; then
+    fail "Return value can not be printed in signed decimal format"
+fi
+
+: "Test printing the error code in hexadecimal format"
+echo funcgraph-retval-hex > trace_options
+count=`cat trace | grep 'proc_reg_write' | grep 'fffffffb' | wc -l`
+if [ $count -eq 0 ]; then
+    fail "Return value can not be printed in hexadecimal format"
+fi
+
+exit 0
+
-- 
2.25.1