lttng-instrumentation/markers-multi-probes-test

Markers : multi-probes test

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

2 files changed, 117 insertions, 1 deletions

diff --git a/samples/markers/Makefile b/samples/markers/Makefile
index 6d7231265f0..2244152159d 100644
--- a/samples/markers/Makefile
+++ b/samples/markers/Makefile
@@ -1,4 +1,4 @@
 # builds the kprobes example kernel modules;
 # then to use one (as root):  insmod <module_name.ko>
 
-obj-$(CONFIG_SAMPLE_MARKERS) += probe-example.o marker-example.o
+obj-$(CONFIG_SAMPLE_MARKERS) += probe-example.o marker-example.o test-multi.o
diff --git a/samples/markers/test-multi.c b/samples/markers/test-multi.c
new file mode 100644
index 00000000000..98fb03cfd93
--- /dev/null
+++ b/samples/markers/test-multi.c
@@ -0,0 +1,116 @@
+/* test-multi.c
+ *
+ * Connects multiple callbacks.
+ *
+ * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * This file is released under the GPLv2.
+ * See the file COPYING for more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/marker.h>
+#include <asm/atomic.h>
+
+struct probe_data {
+	const char *name;
+	const char *format;
+	marker_probe_func *probe_func;
+};
+
+atomic_t eventb_count = ATOMIC_INIT(0);
+
+void probe_subsystem_eventa(void *probe_data, void *call_data,
+	const char *format, va_list *args)
+{
+	/* Increment counter */
+	atomic_inc(&eventb_count);
+}
+
+void probe_subsystem_eventb(void *probe_data, void *call_data,
+	const char *format, va_list *args)
+{
+	/* Increment counter */
+	atomic_inc(&eventb_count);
+}
+
+void probe_subsystem_eventc(void *probe_data, void *call_data,
+	const char *format, va_list *args)
+{
+	/* Increment counter */
+	atomic_inc(&eventb_count);
+}
+
+void probe_subsystem_eventd(void *probe_data, void *call_data,
+	const char *format, va_list *args)
+{
+	/* Increment counter */
+	atomic_inc(&eventb_count);
+}
+
+static struct probe_data probe_array[] =
+{
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0xa },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0xb },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0xc },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0xd },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0x10 },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0x20 },
+	{	.name = "test_multi",
+		.format = MARK_NOARGS,
+		.probe_func = (marker_probe_func*)0x30 },
+};
+
+static int __init probe_init(void)
+{
+	int result;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probe_array); i++) {
+		result = marker_probe_register(probe_array[i].name,
+				probe_array[i].format,
+				probe_array[i].probe_func, (void*)(long)i);
+		if (result)
+			printk(KERN_INFO "Unable to register probe %s\n",
+				probe_array[i].name);
+	}
+	return 0;
+}
+
+static void __exit probe_fini(void)
+{
+	int result;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probe_array); i++) {
+		result = marker_probe_unregister(probe_array[i].name,
+			probe_array[i].probe_func, (void*)(long)i);
+		if (result)
+			printk(KERN_INFO "Unable to unregister probe %s\n",
+				probe_array[i].name);
+	}
+	printk(KERN_INFO "Number of event b : %u\n",
+		atomic_read(&eventb_count));
+	marker_synchronize_unregister();
+}
+
+module_init(probe_init);
+module_exit(probe_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("SUBSYSTEM Probe");