From: lufei <lufei@uniontech.com>
To: ltp@lists.linux.it
Cc: lufei <lufei@uniontech.com>
Subject: [LTP] [PATCH v2] Rewrite ftrace_regression tests with new C API
Date: Mon, 30 Mar 2026 15:15:54 +0800 [thread overview]
Message-ID: <20260330071554.49304-1-lufei@uniontech.com> (raw)
In-Reply-To: <20260304080538.1793-1-lufei@uniontech.com>
Rewritten from old shell scripts.
ftrace_regression01: regression test for panic bug while using
userstacktrace, set userstacktrace in loop and check if success.
ftrace_regression02: for checking signal:signal_generate gives
2 more fields: grp res.
Signed-off-by: lufei <lufei@uniontech.com>
---
runtest/tracing | 4 +-
testcases/kernel/tracing/ftrace_test/Makefile | 3 +-
.../tracing/ftrace_test/ftrace_regression.h | 65 +++++++++++++++
.../tracing/ftrace_test/ftrace_regression01.c | 83 +++++++++++++++++++
.../ftrace_test/ftrace_regression01.sh | 83 -------------------
.../tracing/ftrace_test/ftrace_regression02.c | 70 ++++++++++++++++
.../ftrace_test/ftrace_regression02.sh | 63 --------------
7 files changed, 222 insertions(+), 149 deletions(-)
create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression.h
create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression01.c
delete mode 100755 testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh
create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression02.c
delete mode 100755 testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh
diff --git a/runtest/tracing b/runtest/tracing
index 674e2ad97..2a4a92c5f 100644
--- a/runtest/tracing
+++ b/runtest/tracing
@@ -1,6 +1,6 @@
#DESCRIPTION:Tracing testing
-ftrace_regression01 ftrace_regression01.sh
-ftrace_regression02 ftrace_regression02.sh
+ftrace_regression01 ftrace_regression01
+ftrace_regression02 ftrace_regression02
ftrace-stress-test ftrace_stress_test.sh 90
dynamic_debug01 dynamic_debug01.sh
fanotify25 fanotify25
diff --git a/testcases/kernel/tracing/ftrace_test/Makefile b/testcases/kernel/tracing/ftrace_test/Makefile
index e4a913a56..618cce7e1 100644
--- a/testcases/kernel/tracing/ftrace_test/Makefile
+++ b/testcases/kernel/tracing/ftrace_test/Makefile
@@ -2,6 +2,7 @@ top_srcdir ?= ../../../..
include $(top_srcdir)/include/mk/testcases.mk
-INSTALL_TARGETS := *.sh ftrace_stress/*
+INSTALL_TARGETS := *.sh ftrace_stress/* ftrace_regression01 \
+ ftrace_regression02
include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression.h b/testcases/kernel/tracing/ftrace_test/ftrace_regression.h
new file mode 100644
index 000000000..710276202
--- /dev/null
+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Copyright (c) 2026 lufei <lufei@uniontech.com>
+ *
+ * Shared header for ftrace regression tests.
+ */
+
+#ifndef FTRACE_REGRESSION_H
+#define FTRACE_REGRESSION_H
+
+#include "tst_test.h"
+#include "tst_safe_file_ops.h"
+#include "tst_safe_stdio.h"
+
+#include <string.h>
+
+#define FTRACE_FILE_BUF_SIZE (1024*1024)
+#define FTRACE_LINE_BUF_SIZE 1024
+
+/**
+ * file_contains - Check if a file contains the given string
+ * path: Path to the file
+ * str: String to search for
+ *
+ * Returns: 1 if file contains str, 0 otherwise
+ */
+static inline int file_contains(const char *path, const char *str)
+{
+ char *buf = SAFE_MALLOC(FTRACE_FILE_BUF_SIZE);
+ bool found = false;
+
+ buf[0] = '\0';
+ SAFE_FILE_SCANF(path, "%1048575[^\x01]", buf);
+ found = strstr(buf, str) != NULL;
+ free(buf);
+
+ return found;
+}
+
+/**
+ * file_contains_line - Check if a file ocntains specific line, strictly
+ *
+ */
+static inline int file_contains_line(const char *path, const char *str)
+{
+ char *buf = SAFE_MALLOC(FTRACE_LINE_BUF_SIZE);
+ bool found = false;
+ FILE *fp = SAFE_FOPEN(path, "r");
+
+ while (fgets(buf, FTRACE_LINE_BUF_SIZE, fp)) {
+ buf[strcspn(buf, "\r\n")] = 0;
+ if (strcmp(buf, str) == 0) {
+ found = true;
+ break;
+ }
+ }
+
+ SAFE_FCLOSE(fp);
+ free(buf);
+
+ return found;
+}
+
+#endif /* FTRACE_REGRESSION_H */
+
diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c
new file mode 100644
index 000000000..a67d07fd1
--- /dev/null
+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2015 Red Hat Inc.
+ * Copyright (c) 2026 lufei <lufei@uniontech.com>
+ */
+
+/*\
+ * Regression test for panic while using userstacktrace.
+ *
+ * BUG: unable to handle kernel paging request at 00000000417683c0
+ * IP: [<ffffffff8105c834>] update_curr+0x124/0x1e0
+ * Thread overran stack, or stack corrupted
+ * Oops: 0000 [#1] SMP
+ * last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map
+ *
+ * The bug was fixed by:
+ * 1dbd195 (tracing: Fix preempt count leak)
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include "ftrace_regression.h"
+
+#define DEBUGFS_DIR "debugfs"
+#define STACK_TRACER_PATH "/proc/sys/kernel/stack_tracer_enabled"
+#define TRACE_OPTIONS DEBUGFS_DIR "/tracing/trace_options"
+#define EXC_PAGE_FAULT DEBUGFS_DIR "/tracing/events/exceptions/page_fault_kernel/enable"
+#define MM_PAGE_FAULT DEBUGFS_DIR "/tracing/events/kmem/mm_kernel_pagefault/enable"
+
+#define LOOP 10
+
+static const char *page_fault_path;
+
+static void setup(void)
+{
+ SAFE_MKDIR(DEBUGFS_DIR, 0755);
+ SAFE_MOUNT(NULL, DEBUGFS_DIR, "debugfs", 0, NULL);
+
+ if (access(EXC_PAGE_FAULT, F_OK) == 0)
+ page_fault_path = EXC_PAGE_FAULT;
+ else if (access(MM_PAGE_FAULT, F_OK) == 0)
+ page_fault_path = MM_PAGE_FAULT;
+ else
+ tst_brk(TCONF, "Page fault event not available");
+}
+
+static void run(void)
+{
+ int i;
+
+ for (i = 0; i < LOOP; i++) {
+ SAFE_FILE_PRINTF(STACK_TRACER_PATH, "1");
+ SAFE_FILE_PRINTF(TRACE_OPTIONS, "userstacktrace");
+
+ if (!file_contains_line(TRACE_OPTIONS, "userstacktrace"))
+ tst_brk(TBROK, "Failed to set userstacktrace");
+
+ SAFE_FILE_PRINTF(page_fault_path, "1");
+ }
+
+ tst_res(TPASS, "Finished running the test");
+}
+
+static void cleanup(void)
+{
+ SAFE_UMOUNT(DEBUGFS_DIR);
+}
+
+static struct tst_test test = {
+ .needs_root = 1,
+ .needs_tmpdir = 1,
+ .setup = setup,
+ .test_all = run,
+ .cleanup = cleanup,
+ .save_restore = (const struct tst_path_val[]) {
+ {STACK_TRACER_PATH, NULL, TST_SR_TCONF},
+ {}
+ },
+ .tags = (const struct tst_tag[]) {
+ {"linux-git", "1dbd195"},
+ {}
+ },
+};
diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh
deleted file mode 100755
index d6969cfc6..000000000
--- a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh
+++ /dev/null
@@ -1,83 +0,0 @@
-#! /bin/sh
-
-###########################################################################
-## ##
-## Copyright (c) 2015, Red Hat Inc. ##
-## ##
-## This program is free software: you can redistribute it and/or modify ##
-## it under the terms of the GNU General Public License as published by ##
-## the Free Software Foundation, either version 3 of the License, or ##
-## (at your option) any later version. ##
-## ##
-## This program is distributed in the hope that it will be useful, ##
-## but WITHOUT ANY WARRANTY; without even the implied warranty of ##
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ##
-## GNU General Public License for more details. ##
-## ##
-## You should have received a copy of the GNU General Public License ##
-## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
-## ##
-## Author: Li Wang <liwang@redhat.com> ##
-## ##
-###########################################################################
-## ##
-## Summary: panic while using userstacktrace ##
-## ##
-## BUG: unable to handle kernel paging request at 00000000417683c0 ##
-## IP: [<ffffffff8105c834>] update_curr+0x124/0x1e0 ##
-## PGD 41a796067 PUD 0 ##
-## Thread overran stack, or stack corrupted ##
-## Oops: 0000 [#1] SMP ##
-## last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map ##
-## ##
-## The bug was fixed by: ##
-## 1dbd195 (tracing: Fix preempt count leak) ##
-## ##
-###########################################################################
-
-export TCID="ftrace_regression01"
-export TST_TOTAL=1
-
-. ftrace_lib.sh
-
-LOOP=10
-
-TSTACK_TRACE_PATH="/proc/sys/kernel/stack_tracer_enabled"
-EXC_PAGE_FAULT_ENABLE="$TRACING_PATH/events/exceptions/page_fault_kernel/enable"
-MM_PAGE_FAULT_ENABLE="$TRACING_PATH/events/kmem/mm_kernel_pagefault/enable"
-
-ftrace_userstacktrace_test()
-{
- if [ ! -e "$TSTACK_TRACE_PATH" ]; then
- tst_brkm TCONF "Stack Tracer is not cofigured in This kernel"
- fi
-
- for i in $(seq $LOOP); do
- echo 1 > $TSTACK_TRACE_PATH
- echo userstacktrace > $TRACING_PATH/trace_options
- grep -q "^userstacktrace" $TRACING_PATH/trace_options
- if [ $? -ne 0 ]; then
- tst_brkm TBROK "Failed to set userstacktrace"
- fi
-
- if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then
- exc_page_fault_enable=`cat $EXC_PAGE_FAULT_ENABLE`
- echo 1 > $EXC_PAGE_FAULT_ENABLE
- else
- mm_page_fault_enable=`cat $MM_PAGE_FAULT_ENABLE`
- echo 1 > $MM_PAGE_FAULT_ENABLE
- fi
- done
-
- if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then
- echo "$exc_page_fault_enable" > $EXC_PAGE_FAULT_ENABLE
- else
- echo "$mm_page_fault_enable" > $MM_PAGE_FAULT_ENABLE
- fi
-
- tst_resm TPASS "Finished running the test"
-}
-
-ftrace_userstacktrace_test
-
-tst_exit
diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c
new file mode 100644
index 000000000..97dbaf371
--- /dev/null
+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2015 Red Hat Inc.
+ * Copyright (c) 2026 lufei <lufei@uniontech.com>
+ */
+
+/*\
+ *
+ * Check signal:signal_generate gives 2 more fields: grp res
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include "ftrace_regression.h"
+
+#define DEBUGFS_DIR "debugfs"
+#define SET_EVENT DEBUGFS_DIR "/tracing/set_event"
+#define TRACING_ON DEBUGFS_DIR "/tracing/tracing_on"
+#define TRACE_FILE DEBUGFS_DIR "/tracing/trace"
+
+#define LOOP 100
+
+static void setup(void)
+{
+ SAFE_MKDIR(DEBUGFS_DIR, 0755);
+ SAFE_MOUNT(NULL, DEBUGFS_DIR, "debugfs", 0, NULL);
+}
+
+static void run(void)
+{
+ int i;
+
+ SAFE_FILE_PRINTF(SET_EVENT, "signal:signal_generate");
+ SAFE_FILE_PRINTF(TRACING_ON, "1");
+ SAFE_FILE_PRINTF(TRACE_FILE, "\n");
+
+ for (i = 0; i < LOOP; i++)
+ tst_cmd((const char *[]){"ls", "-l", "/proc", NULL},
+ "/dev/null", "/dev/null", 0);
+
+ if (file_contains(TRACE_FILE, "grp=") && file_contains(TRACE_FILE, "res="))
+ tst_res(TPASS, "Finished running the test");
+ else
+ tst_res(TFAIL, "Pattern grp=[0-9] res=[0-9] not found in trace");
+}
+
+static void cleanup(void)
+{
+ SAFE_UMOUNT(DEBUGFS_DIR);
+}
+
+static struct tst_test test = {
+ .needs_root = 1,
+ .needs_tmpdir = 1,
+ .setup = setup,
+ .test_all = run,
+ .cleanup = cleanup,
+ .needs_cmds = (struct tst_cmd[]) {
+ {.cmd = "ls"},
+ {}
+ },
+ .min_kver = "3.2",
+ .tags = (const struct tst_tag[]) {
+ {"linux-git", "6c303d3"},
+ {"linux-git", "163566f"},
+ {}
+ },
+};
+
diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh
deleted file mode 100755
index 3c32f219e..000000000
--- a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh
+++ /dev/null
@@ -1,63 +0,0 @@
-#! /bin/sh
-
-###########################################################################
-## ##
-## Copyright (c) 2015, Red Hat Inc. ##
-## ##
-## This program is free software: you can redistribute it and/or modify ##
-## it under the terms of the GNU General Public License as published by ##
-## the Free Software Foundation, either version 3 of the License, or ##
-## (at your option) any later version. ##
-## ##
-## This program is distributed in the hope that it will be useful, ##
-## but WITHOUT ANY WARRANTY; without even the implied warranty of ##
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ##
-## GNU General Public License for more details. ##
-## ##
-## You should have received a copy of the GNU General Public License ##
-## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
-## ##
-## Author: Li Wang <liwang@redhat.com> ##
-## ##
-###########################################################################
-## ##
-## Summary: check signal:signal_generate gives 2 more fields: grp res ##
-## ##
-## This testcase is writing for signal events change: ##
-## 6c303d3 tracing: let trace_signal_generate() report more info...##
-## 163566f tracing: send_sigqueue() needs trace_signal_generate() ##
-## ##
-###########################################################################
-
-export TCID="ftrace_regression02"
-export TST_TOTAL=1
-
-. ftrace_lib.sh
-
-ftrace_signal_test()
-{
- # Set envent
- echo 'signal:signal_generate' > $TRACING_PATH/set_event
- echo 1 > $TRACING_PATH/tracing_on
- echo > $TRACING_PATH/trace
-
- # just to generate trace
- for i in $(seq 100); do
- ls -l /proc > /dev/null 2>&1
- done
-
- grep -q 'grp=[0-9] res=[0-9]' $TRACING_PATH/trace
- if [ $? -eq 0 ]; then
- tst_resm TPASS "finished running the test."
- else
- tst_resm TFAIL "running the test failed, please check log message."
- fi
-}
-
-if tst_kvcmp -lt "3.2"; then
- tst_brkm TCONF "The test should be run in kernels >= 3.2.0 Skip the test..."
-fi
-
-ftrace_signal_test
-
-tst_exit
--
2.39.3
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2026-03-30 7:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 8:05 [LTP] [PATCH 1/2] Rewrite ftrace_regression01.sh with new C API lufei
2026-03-04 8:05 ` [LTP] [PATCH 2/2] Rewrite ftrace_regression02.sh " lufei
2026-03-27 10:34 ` [LTP] [PATCH 1/2] Rewrite ftrace_regression01.sh " Andrea Cervesato via ltp
2026-03-30 7:15 ` lufei [this message]
2026-03-30 8:39 ` [LTP] [PATCH v2] Rewrite ftrace_regression tests " Andrea Cervesato via ltp
2026-03-31 1:55 ` [LTP] [PATCH v3] " lufei
2026-03-31 7:53 ` Petr Vorel
2026-03-31 7:56 ` Petr Vorel
2026-03-31 18:28 ` Cyril Hrubis
2026-03-31 10:01 ` [LTP] [PATCH v4] " lufei
2026-04-24 2:08 ` [LTP] [PATCH v5] " lufei
2026-04-24 2:42 ` [LTP] " linuxtestproject.agent
2026-04-27 8:40 ` [LTP] [PATCH v5] " Li Wang
2026-04-28 7:33 ` Cyril Hrubis
2026-04-28 7:50 ` [LTP] [PATCH v6] " lufei
2026-04-28 9:30 ` [LTP] " linuxtestproject.agent
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