[LTP] [PATCH 2/2] Rewrite ftrace_regression02.sh with new C API

[lufei]

This test is for checking signal:signal_generate gives 2 more fields:
grp res.

Signed-off-by: lufei <lufei@uniontech.com>
---
 .../tracing/ftrace_test/ftrace_regression02.c | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression02.c

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..aa3500090
--- /dev/null
+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c
@@ -0,0 +1,73 @@
+// 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"},
+		{}
+	},
+	.save_restore = (const struct tst_path_val[]) {
+		{"/proc/sys/kernel/stack_tracer_enabled", NULL, TST_SR_TCONF},
+		{}
+	},
+	.tags = (const struct tst_tag[]) {
+		{"linux-git", "6c303d3"},
+		{"linux-git", "163566f"},
+		{}
+	},
+};
+
-- 
2.39.3