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-rw-r--r--samples/Kconfig6
-rw-r--r--samples/Makefile2
-rw-r--r--samples/markers/Makefile4
-rw-r--r--samples/markers/marker-example.c53
-rw-r--r--samples/markers/probe-example.c94
-rw-r--r--samples/markers/test-multi.c116
6 files changed, 274 insertions, 1 deletions
diff --git a/samples/Kconfig b/samples/Kconfig
index e03cf0e374d7..7b1eadec88a9 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -5,6 +5,12 @@ menuconfig SAMPLES
if SAMPLES
+config SAMPLE_MARKERS
+ tristate "Build markers examples -- loadable modules only"
+ depends on MARKERS && m
+ help
+ This build markers example modules.
+
config SAMPLE_TRACEPOINTS
tristate "Build tracepoints examples -- loadable modules only"
depends on TRACEPOINTS && m
diff --git a/samples/Makefile b/samples/Makefile
index f26c0959fd86..ab3546401973 100644
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -1,4 +1,4 @@
# Makefile for Linux samples code
obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ tracepoints/ trace_events/ \
- hw_breakpoint/ kfifo/ kdb/
+ hw_breakpoint/ kfifo/ kdb/ markers/
diff --git a/samples/markers/Makefile b/samples/markers/Makefile
new file mode 100644
index 000000000000..2244152159d7
--- /dev/null
+++ b/samples/markers/Makefile
@@ -0,0 +1,4 @@
+# builds the kprobes example kernel modules;
+# then to use one (as root): insmod <module_name.ko>
+
+obj-$(CONFIG_SAMPLE_MARKERS) += probe-example.o marker-example.o test-multi.o
diff --git a/samples/markers/marker-example.c b/samples/markers/marker-example.c
new file mode 100644
index 000000000000..06afde476318
--- /dev/null
+++ b/samples/markers/marker-example.c
@@ -0,0 +1,53 @@
+/* marker-example.c
+ *
+ * Executes a marker when /proc/marker-example is opened.
+ *
+ * (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/module.h>
+#include <linux/marker.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+
+struct proc_dir_entry *pentry_example;
+
+static int my_open(struct inode *inode, struct file *file)
+{
+ int i;
+
+ trace_mark(samples, subsystem_event, "integer %d string %s", 123,
+ "example string");
+ for (i = 0; i < 10; i++)
+ trace_mark(samples, subsystem_eventb, MARK_NOARGS);
+ return -EPERM;
+}
+
+static struct file_operations mark_ops = {
+ .open = my_open,
+};
+
+static int __init example_init(void)
+{
+ printk(KERN_ALERT "example init\n");
+ pentry_example = proc_create("marker-example", 0444, NULL, &mark_ops);
+ if (!pentry_example)
+ return -EPERM;
+ return 0;
+}
+
+static void __exit example_exit(void)
+{
+ printk(KERN_ALERT "example exit\n");
+ remove_proc_entry("marker-example", NULL);
+}
+
+module_init(example_init)
+module_exit(example_exit)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Marker example");
diff --git a/samples/markers/probe-example.c b/samples/markers/probe-example.c
new file mode 100644
index 000000000000..2c449c0c1eba
--- /dev/null
+++ b/samples/markers/probe-example.c
@@ -0,0 +1,94 @@
+/* probe-example.c
+ *
+ * Connects two functions to marker call sites.
+ *
+ * (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;
+};
+
+static void probe_subsystem_event(const struct marker *mdata,
+ void *probe_data, void *call_data,
+ const char *format, va_list *args)
+{
+ /* Declare args */
+ unsigned int value;
+ const char *mystr;
+
+ /* Assign args */
+ value = va_arg(*args, typeof(value));
+ mystr = va_arg(*args, typeof(mystr));
+
+ /* Call printk */
+ printk(KERN_INFO "Value %u, string %s\n", value, mystr);
+
+ /* or count, check rights, serialize data in a buffer */
+}
+
+atomic_t eventb_count = ATOMIC_INIT(0);
+
+static void probe_subsystem_eventb(const struct marker *mdata,
+ 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 = "subsystem_event",
+ .format = "integer %d string %s",
+ .probe_func = probe_subsystem_event },
+ { .name = "subsystem_eventb",
+ .format = MARK_NOARGS,
+ .probe_func = probe_subsystem_eventb },
+};
+
+static int __init probe_init(void)
+{
+ int result;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(probe_array); i++) {
+ result = marker_probe_register("samples", probe_array[i].name,
+ probe_array[i].format,
+ probe_array[i].probe_func, &probe_array[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 i;
+
+ for (i = 0; i < ARRAY_SIZE(probe_array); i++)
+ marker_probe_unregister("samples", probe_array[i].name,
+ probe_array[i].probe_func, &probe_array[i]);
+ 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");
diff --git a/samples/markers/test-multi.c b/samples/markers/test-multi.c
new file mode 100644
index 000000000000..9f62d2921b88
--- /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("samples", 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("samples", 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");
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-20 05:24:59 +0000