static void
cleanup (void)
{
/* we make the assumption along the code that we are
* cleaning up only if the runtime is shutting down */
g_assert (mono_runtime_is_shutting_down ());
selector_thread_wakeup ();
while (io_selector_running)
mono_thread_info_usleep (1000);
}
void
mono_runtime_shutdown_stat_profiler (void)
{
mono_atomic_store_i32 (&sampling_thread_running, 0);
mono_profiler_sampling_thread_post ();
#ifndef HOST_DARWIN
/*
* There is a slight problem when we're using CLOCK_PROCESS_CPUTIME_ID: If
* we're shutting down and there's largely no activity in the process other
* than waiting for the sampler thread to shut down, it can take upwards of
* 20 seconds (depending on a lot of factors) for us to shut down because
* the sleep progresses very slowly as a result of the low CPU activity.
*
* We fix this by repeatedly sending the profiler signal to the sampler
* thread in order to interrupt the sleep. clock_sleep_ns_abs () will check
* sampling_thread_running upon an interrupt and return immediately if it's
* zero. profiler_signal_handler () has a special case to ignore the signal
* for the sampler thread.
*/
MonoThreadInfo *info;
// Did it shut down already?
if ((info = mono_thread_info_lookup (sampling_thread))) {
while (!mono_atomic_load_i32 (&sampling_thread_exiting)) {
mono_threads_pthread_kill (info, profiler_signal);
mono_thread_info_usleep (10 * 1000 /* 10ms */);
}
// Make sure info can be freed.
mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
}
#endif
mono_os_event_wait_one (&sampling_thread_exited, MONO_INFINITE_WAIT, FALSE);
mono_os_event_destroy (&sampling_thread_exited);
/*
* We can't safely remove the signal handler because we have no guarantee
* that all pending signals have been delivered at this point. This should
* not really be a problem anyway.
*/
//remove_signal_handler (profiler_signal);
}
/**
* mono_threads_attach_tools_thread
*
* Attach the current thread as a tool thread. DON'T USE THIS FUNCTION WITHOUT READING ALL DISCLAIMERS.
*
* A tools thread is a very special kind of thread that needs access to core runtime facilities but should
* not be counted as a regular thread for high order facilities such as executing managed code or accessing
* the managed heap.
*
* This is intended only to tools such as a profiler than needs to be able to use our lock-free support when
* doing things like resolving backtraces in their background processing thread.
*/
void
mono_threads_attach_tools_thread (void)
{
int dummy = 0;
MonoThreadInfo *info;
/* Must only be called once */
g_assert (!mono_native_tls_get_value (thread_info_key));
while (!mono_threads_inited) {
mono_thread_info_usleep (10);
}
info = mono_thread_info_attach (&dummy);
g_assert (info);
info->tools_thread = TRUE;
}
