void oprofile_shutdown(void)
{
down(&start_sem);
sync_stop();
if (oprofile_ops.shutdown)
oprofile_ops.shutdown();
is_setup = 0;
free_event_buffer();
free_cpu_buffers();
up(&start_sem);
}
int oprofile_setup(void)
{
int err;
mutex_lock(&start_mutex);
if ((err = alloc_cpu_buffers()))
goto out;
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();
out2:
free_event_buffer();
out1:
free_cpu_buffers();
out:
mutex_unlock(&start_mutex);
return err;
}
static int px_tp_d_release(struct inode *inode, struct file *fp)
{
g_client_count--;
if (g_client_count == 0)
{
/* stop profiling in case it is still running */
stop_profiling();
/* free buffers in case they are not freed */
free_event_buffer();
free_module_buffer();
}
return 0;
}
/*
* allocate event buffer
*/
static int allocate_event_buffer(unsigned int *size)
{
unsigned int buffer_size;
void * address;
if (copy_from_user(&buffer_size, size, sizeof(unsigned int)) != 0)
{
return -EFAULT;
}
buffer_size = PAGE_ALIGN(buffer_size);
/* free kernel buffers if it is already allocated */
if (g_event_buffer.buffer.address != 0)
{
free_event_buffer();
}
//address = __vmalloc(buffer_size, GFP_KERNEL, pgprot_noncached(PAGE_KERNEL));
address = vmalloc(buffer_size);
if (address == NULL)
{
return -ENOMEM;
}
g_event_buffer.buffer.address = address;
g_event_buffer.buffer.size = buffer_size;
g_event_buffer.buffer.read_offset = 0;
g_event_buffer.buffer.write_offset = 0;
// g_event_buffer.buffer.is_data_lost = false;
g_event_buffer.is_full_event_set = false;
if (copy_to_user(size, &buffer_size, sizeof(unsigned int)) != 0)
{
return -EFAULT;
}
return 0;
}
int oprofile_setup(void)
{
int err;
down(&start_sem);
if ((err = alloc_cpu_buffers()))
goto out;
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 ((err = sync_start()))
goto out3;
is_setup = 1;
up(&start_sem);
return 0;
out3:
if (oprofile_ops.shutdown)
oprofile_ops.shutdown();
out2:
free_event_buffer();
out1:
free_cpu_buffers();
out:
up(&start_sem);
return err;
}
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;
free_event_buffer();
free_cpu_buffers();
mutex_unlock(&start_mutex);
}
static long px_tp_d_ioctl( struct file *fp,
unsigned int cmd,
unsigned long arg)
#endif
{
switch (cmd)
{
case PX_TP_CMD_START_MODULE_TRACKING:
return start_module_tracking();
case PX_TP_CMD_START_SAMPLING:
return start_sampling((bool *)arg);
case PX_TP_CMD_STOP_PROFILING:
return stop_profiling();
case PX_TP_CMD_PAUSE_PROFILING:
return pause_profiling();
case PX_TP_CMD_RESUME_PROFILING:
return resume_profiling();
case PX_TP_CMD_ALLOC_EVENT_BUFFER:
return allocate_event_buffer((unsigned int *)arg);
case PX_TP_CMD_ALLOC_MODULE_BUFFER:
return allocate_module_buffer((unsigned int *)arg);
case PX_TP_CMD_FREE_EVENT_BUFFER:
return free_event_buffer();
case PX_TP_CMD_FREE_MODULE_BUFFER:
return free_module_buffer();
case PX_TP_CMD_SET_AUTO_LAUNCH_APP_PID:
return set_auto_launch_app_pid((pid_t *)arg);
case PX_TP_CMD_SET_WAIT_IMAGE_LOAD_NAME:
return set_wait_image_load_name((char *)arg);
case PX_TP_CMD_QUERY_REQUEST:
return query_request((struct query_request_data *)arg);
case PX_TP_CMD_GET_CPU_ID:
return get_cpu_id((unsigned long *)arg);
case PX_TP_CMD_GET_TARGET_RAW_DATA_LENGTH:
return get_target_raw_data_length((unsigned long *)arg);
case PX_TP_CMD_GET_TARGET_INFO:
return get_target_info((unsigned long *)arg);
case PX_TP_CMD_GET_CPU_FREQ:
return get_cpu_freq((unsigned int *)arg);
case PX_TP_CMD_GET_TIMESTAMP_FREQ:
return get_timestamp_frequency((unsigned long *)arg);
case PX_TP_CMD_GET_TIMESTAMP:
return get_time_stamp((unsigned long long *)arg);
case PX_TP_CMD_ADD_MODULE_RECORD:
return add_module_record((struct add_module_data *)arg);
#if 0
case PX_TP_CMD_RESET_EVENT_BUFFER_FULL:
return reset_event_buffer_full((bool *)arg);
case PX_TP_CMD_RESET_MODULE_BUFFER_FULL:
return reset_module_buffer_full((bool *)arg);
#endif
// case PX_TP_CMD_SET_KERNEL_FUNC_ADDR:
// return set_kernel_func_addr((struct tp_kernel_func_addr *)arg);
// case PX_TP_CMD_HOOK_ADDRESS:
// return hook_address((struct tp_hook_address *)arg);
case PX_TP_CMD_READ_EVENT_BUFFER:
return read_event_buffer((struct read_buffer_data *)arg);
case PX_TP_CMD_READ_MODULE_BUFFER:
return read_module_buffer((struct read_buffer_data *)arg);
case PX_TP_CMD_GET_POSSIBLE_CPU_NUM:
return get_possible_cpu_number((unsigned int *)arg);
case PX_TP_CMD_GET_ONLINE_CPU_NUM:
return get_online_cpu_number((unsigned int *)arg);
default:
return -EINVAL;
}
}
