[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/samples/tracepoints/tracepoint-probe-sample.c b/ap/os/linux/linux-3.4.x/samples/tracepoints/tracepoint-probe-sample.c
new file mode 100644
index 0000000..744c0b9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/samples/tracepoints/tracepoint-probe-sample.c
@@ -0,0 +1,57 @@
+/*
+ * tracepoint-probe-sample.c
+ *
+ * sample tracepoint probes.
+ */
+
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/dcache.h>
+#include "tp-samples-trace.h"
+
+/*
+ * Here the caller only guarantees locking for struct file and struct inode.
+ * Locking must therefore be done in the probe to use the dentry.
+ */
+static void probe_subsys_event(void *ignore,
+ struct inode *inode, struct file *file)
+{
+ path_get(&file->f_path);
+ dget(file->f_path.dentry);
+ printk(KERN_INFO "Event is encountered with filename %s\n",
+ file->f_path.dentry->d_name.name);
+ dput(file->f_path.dentry);
+ path_put(&file->f_path);
+}
+
+static void probe_subsys_eventb(void *ignore)
+{
+ printk(KERN_INFO "Event B is encountered\n");
+}
+
+static int __init tp_sample_trace_init(void)
+{
+ int ret;
+
+ ret = register_trace_subsys_event(probe_subsys_event, NULL);
+ WARN_ON(ret);
+ ret = register_trace_subsys_eventb(probe_subsys_eventb, NULL);
+ WARN_ON(ret);
+
+ return 0;
+}
+
+module_init(tp_sample_trace_init);
+
+static void __exit tp_sample_trace_exit(void)
+{
+ unregister_trace_subsys_eventb(probe_subsys_eventb, NULL);
+ unregister_trace_subsys_event(probe_subsys_event, NULL);
+ tracepoint_synchronize_unregister();
+}
+
+module_exit(tp_sample_trace_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Tracepoint Probes Samples");