#include "cpu_buffer.h"
#include "buffer_sync.h"
#include "oprofile_stats.h"
-
+
struct oprofile_operations oprofile_ops;
unsigned long oprofile_started;
int oprofile_setup(void)
{
int err;
-
+
mutex_lock(&start_mutex);
if ((err = alloc_cpu_buffers()))
if ((err = alloc_event_buffer()))
goto out1;
-
+
if (oprofile_ops.setup && (err = oprofile_ops.setup()))
goto out2;
-
+
/* Note even though this starts part of the
* profiling overhead, it's necessary to prevent
* us missing task deaths and eventually oopsing
* when trying to process the event buffer.
*/
+ if (oprofile_ops.sync_start) {
+ int sync_ret = oprofile_ops.sync_start();
+ switch (sync_ret) {
+ case 0:
+ goto post_sync;
+ case 1:
+ goto do_generic;
+ case -1:
+ goto out3;
+ default:
+ goto out3;
+ }
+ }
+do_generic:
if ((err = sync_start()))
goto out3;
+post_sync:
is_setup = 1;
mutex_unlock(&start_mutex);
return 0;
-
+
out3:
if (oprofile_ops.shutdown)
oprofile_ops.shutdown();
int oprofile_start(void)
{
int err = -EINVAL;
-
+
mutex_lock(&start_mutex);
-
+
if (!is_setup)
goto out;
- err = 0;
-
+ err = 0;
+
if (oprofile_started)
goto out;
-
+
oprofile_reset_stats();
if ((err = oprofile_ops.start()))
return err;
}
-
+
/* echo 0>/dev/oprofile/enable */
void oprofile_stop(void)
{
void oprofile_shutdown(void)
{
mutex_lock(&start_mutex);
+ if (oprofile_ops.sync_stop) {
+ int sync_ret = oprofile_ops.sync_stop();
+ switch (sync_ret) {
+ case 0:
+ goto post_sync;
+ case 1:
+ goto do_generic;
+ default:
+ goto post_sync;
+ }
+ }
+do_generic:
sync_stop();
+post_sync:
if (oprofile_ops.shutdown)
oprofile_ops.shutdown();
is_setup = 0;
oprofile_arch_exit();
}
-
+
module_init(oprofile_init);
module_exit(oprofile_exit);
module_param_named(timer, timer, int, 0644);
MODULE_PARM_DESC(timer, "force use of timer interrupt");
-
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Levon <levon@movementarian.org>");
MODULE_DESCRIPTION("OProfile system profiler");