static void
file_mmap_init (void)
{
retry:
switch (mmap_init_state) {
case 0:
if (InterlockedCompareExchange (&mmap_init_state, 1, 0) != 0)
goto retry;
named_regions = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL);
mono_mutex_init (&named_regions_mutex);
mono_atomic_store_release (&mmap_init_state, 2);
break;
case 1:
do {
g_usleep (1000); /* Been init'd by other threads, this is very rare. */
} while (mmap_init_state != 2);
break;
case 2:
break;
default:
g_error ("Invalid init state %d", mmap_init_state);
}
}
/**
* InitializeCriticalSection:
* @section: The critical section to initialise
*
* Initialises a critical section.
*/
void InitializeCriticalSection(WapiCriticalSection *section)
{
int ret;
mono_once(&attr_key_once, attr_init);
ret = mono_mutex_init(§ion->mutex, &attr);
g_assert (ret == 0);
}
static void
noshm_semaphores_init (void)
{
int i;
for (i = 0; i < _WAPI_SHARED_SEM_COUNT; i++)
mono_mutex_init (&noshm_sems [i]);
}
void
sgen_workers_init (int num_workers)
{
int i;
if (!sgen_get_major_collector ()->is_parallel)
return;
//g_print ("initing %d workers\n", num_workers);
workers_num = num_workers;
workers_data = sgen_alloc_internal_dynamic (sizeof (WorkerData) * num_workers, INTERNAL_MEM_WORKER_DATA, TRUE);
memset (workers_data, 0, sizeof (WorkerData) * num_workers);
MONO_SEM_INIT (&workers_waiting_sem, 0);
MONO_SEM_INIT (&workers_done_sem, 0);
sgen_gray_object_queue_init_with_alloc_prepare (&workers_distribute_gray_queue,
workers_gray_queue_share_redirect, &workers_gc_thread_data);
mono_mutex_init (&workers_gc_thread_data.stealable_stack_mutex, NULL);
workers_gc_thread_data.stealable_stack_fill = 0;
if (sgen_get_major_collector ()->alloc_worker_data)
workers_gc_thread_data.major_collector_data = sgen_get_major_collector ()->alloc_worker_data ();
for (i = 0; i < workers_num; ++i) {
/* private gray queue is inited by the thread itself */
mono_mutex_init (&workers_data [i].stealable_stack_mutex, NULL);
workers_data [i].stealable_stack_fill = 0;
if (sgen_get_major_collector ()->alloc_worker_data)
workers_data [i].major_collector_data = sgen_get_major_collector ()->alloc_worker_data ();
}
LOCK_INIT (workers_job_queue_mutex);
sgen_register_fixed_internal_mem_type (INTERNAL_MEM_JOB_QUEUE_ENTRY, sizeof (JobQueueEntry));
mono_counters_register ("Stolen from self lock", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_workers_stolen_from_self_lock);
mono_counters_register ("Stolen from self no lock", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_workers_stolen_from_self_no_lock);
mono_counters_register ("Stolen from others", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_workers_stolen_from_others);
mono_counters_register ("# workers waited", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_workers_num_waited);
}
void
mono_counters_init (void)
{
if (initialized)
return;
mono_mutex_init (&counters_mutex);
initialize_system_counters ();
initialized = TRUE;
}
void
sgen_thread_pool_init (int num_threads, SgenThreadPoolThreadInitFunc init_func, SgenThreadPoolIdleJobFunc idle_func, SgenThreadPoolContinueIdleJobFunc continue_idle_func, void **thread_datas)
{
SGEN_ASSERT (0, num_threads == 1, "We only support 1 thread pool thread for now.");
mono_mutex_init (&lock);
mono_cond_init (&work_cond, NULL);
mono_cond_init (&done_cond, NULL);
thread_init_func = init_func;
idle_job_func = idle_func;
continue_idle_job_func = continue_idle_func;
mono_native_thread_create (&thread, thread_func, thread_datas ? thread_datas [0] : NULL);
}
void mono_profiler_startup (const char *desc)
{
MonoProfiler *prof = g_new0 (MonoProfiler, 1);
mono_mutex_init (&mismatched_files_section);
prof->mismatched_files_hash = g_hash_table_new (mismatched_files_guint32_hash, mismatched_files_guint32_equal);
prof->saved_strings_hash = g_hash_table_new (NULL, NULL);
prof->string_locations_hash = g_hash_table_new (mismatched_files_guint32_hash, mismatched_files_guint32_equal);
mono_profiler_install (prof, profiler_shutdown);
mono_profiler_install_runtime_initialized (runtime_initialized_cb);
mono_profiler_install_iomap (mono_portability_iomap_event);
mono_profiler_install_allocation (mono_portability_remember_alloc);
mono_profiler_set_events (MONO_PROFILE_ALLOCATIONS | MONO_PROFILE_IOMAP_EVENTS);
}
/*
Returns a recursive mutex that is safe under suspension.
A suspension safe mutex means one that can handle this scenario:
mutex M
thread 1:
1)lock M
2)suspend thread 2
3)unlock M
4)lock M
thread 2:
5)lock M
Say (1) happens before (5) and (5) happens before (2).
This means that thread 2 was suspended by the kernel because
it's waiting on mutext M.
Thread 1 then proceed to suspend thread 2 and unlock/lock the
mutex.
If the kernel implements mutexes with FIFO wait lists, this means
that thread 1 will be blocked waiting for thread 2 acquire the lock.
Since thread 2 is suspended, we have a deadlock.
A suspend safe mutex is an unfair lock but will schedule any runable
thread that is waiting for a the lock.
This problem was witnessed on OSX in mono/tests/thread-exit.cs.
*/
int
mono_mutex_init_suspend_safe (mono_mutex_t *mutex)
{
#if defined(__APPLE__)
int res;
pthread_mutexattr_t attr;
pthread_mutexattr_init (&attr);
pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutexattr_setpolicy_np (&attr, _PTHREAD_MUTEX_POLICY_FIRSTFIT);
res = pthread_mutex_init (mutex, &attr);
pthread_mutexattr_destroy (&attr);
return res;
#else
return mono_mutex_init (mutex);
#endif
}
static void
ensure_initialized (gboolean *enable_worker_tracking)
{
ThreadPoolHillClimbing *hc;
const char *threads_per_cpu_env;
gint threads_per_cpu;
gint threads_count;
if (enable_worker_tracking) {
// TODO implement some kind of switch to have the possibily to use it
*enable_worker_tracking = FALSE;
}
if (status >= STATUS_INITIALIZED)
return;
if (status == STATUS_INITIALIZING || InterlockedCompareExchange (&status, STATUS_INITIALIZING, STATUS_NOT_INITIALIZED) != STATUS_NOT_INITIALIZED) {
while (status == STATUS_INITIALIZING)
mono_thread_info_yield ();
g_assert (status >= STATUS_INITIALIZED);
return;
}
g_assert (!threadpool);
threadpool = g_new0 (ThreadPool, 1);
g_assert (threadpool);
threadpool->domains = g_ptr_array_new ();
mono_mutex_init_recursive (&threadpool->domains_lock);
threadpool->parked_threads = g_ptr_array_new ();
mono_mutex_init (&threadpool->parked_threads_lock);
threadpool->working_threads = g_ptr_array_new ();
mono_mutex_init (&threadpool->working_threads_lock);
threadpool->heuristic_adjustment_interval = 10;
mono_mutex_init (&threadpool->heuristic_lock);
mono_rand_open ();
hc = &threadpool->heuristic_hill_climbing;
hc->wave_period = HILL_CLIMBING_WAVE_PERIOD;
hc->max_thread_wave_magnitude = HILL_CLIMBING_MAX_WAVE_MAGNITUDE;
hc->thread_magnitude_multiplier = (gdouble) HILL_CLIMBING_WAVE_MAGNITUDE_MULTIPLIER;
hc->samples_to_measure = hc->wave_period * HILL_CLIMBING_WAVE_HISTORY_SIZE;
hc->target_throughput_ratio = (gdouble) HILL_CLIMBING_BIAS;
hc->target_signal_to_noise_ratio = (gdouble) HILL_CLIMBING_TARGET_SIGNAL_TO_NOISE_RATIO;
hc->max_change_per_second = (gdouble) HILL_CLIMBING_MAX_CHANGE_PER_SECOND;
hc->max_change_per_sample = (gdouble) HILL_CLIMBING_MAX_CHANGE_PER_SAMPLE;
hc->sample_interval_low = HILL_CLIMBING_SAMPLE_INTERVAL_LOW;
hc->sample_interval_high = HILL_CLIMBING_SAMPLE_INTERVAL_HIGH;
hc->throughput_error_smoothing_factor = (gdouble) HILL_CLIMBING_ERROR_SMOOTHING_FACTOR;
hc->gain_exponent = (gdouble) HILL_CLIMBING_GAIN_EXPONENT;
hc->max_sample_error = (gdouble) HILL_CLIMBING_MAX_SAMPLE_ERROR_PERCENT;
hc->current_control_setting = 0;
hc->total_samples = 0;
hc->last_thread_count = 0;
hc->average_throughput_noise = 0;
hc->elapsed_since_last_change = 0;
hc->accumulated_completion_count = 0;
hc->accumulated_sample_duration = 0;
hc->samples = g_new0 (gdouble, hc->samples_to_measure);
hc->thread_counts = g_new0 (gdouble, hc->samples_to_measure);
hc->random_interval_generator = rand_create ();
hc->current_sample_interval = rand_next (&hc->random_interval_generator, hc->sample_interval_low, hc->sample_interval_high);
if (!(threads_per_cpu_env = g_getenv ("MONO_THREADS_PER_CPU")))
threads_per_cpu = 1;
else
threads_per_cpu = CLAMP (atoi (threads_per_cpu_env), 1, 50);
threads_count = mono_cpu_count () * threads_per_cpu;
threadpool->limit_worker_min = threadpool->limit_io_min = threads_count;
threadpool->limit_worker_max = threadpool->limit_io_max = threads_count * 100;
threadpool->counters._.max_working = threadpool->limit_worker_min;
threadpool->cpu_usage_state = g_new0 (MonoCpuUsageState, 1);
threadpool->suspended = FALSE;
status = STATUS_INITIALIZED;
}
void
mono_gc_base_init (void)
{
MonoThreadInfoCallbacks cb;
const char *env;
int dummy;
if (gc_initialized)
return;
/*
* Handle the case when we are called from a thread different from the main thread,
* confusing libgc.
* FIXME: Move this to libgc where it belongs.
*
* we used to do this only when running on valgrind,
* but it happens also in other setups.
*/
#if defined(HAVE_PTHREAD_GETATTR_NP) && defined(HAVE_PTHREAD_ATTR_GETSTACK) && !defined(__native_client__)
{
size_t size;
void *sstart;
pthread_attr_t attr;
pthread_getattr_np (pthread_self (), &attr);
pthread_attr_getstack (&attr, &sstart, &size);
pthread_attr_destroy (&attr);
/*g_print ("stackbottom pth is: %p\n", (char*)sstart + size);*/
#ifdef __ia64__
/*
* The calculation above doesn't seem to work on ia64, also we need to set
* GC_register_stackbottom as well, but don't know how.
*/
#else
/* apparently with some linuxthreads implementations sstart can be NULL,
* fallback to the more imprecise method (bug# 78096).
*/
if (sstart) {
GC_stackbottom = (char*)sstart + size;
} else {
int dummy;
gsize stack_bottom = (gsize)&dummy;
stack_bottom += 4095;
stack_bottom &= ~4095;
GC_stackbottom = (char*)stack_bottom;
}
#endif
}
#elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
GC_stackbottom = (char*)pthread_get_stackaddr_np (pthread_self ());
#elif defined(__OpenBSD__)
# include <pthread_np.h>
{
stack_t ss;
int rslt;
rslt = pthread_stackseg_np(pthread_self(), &ss);
g_assert (rslt == 0);
GC_stackbottom = (char*)ss.ss_sp;
}
#elif defined(__native_client__)
/* Do nothing, GC_stackbottom is set correctly in libgc */
#else
{
int dummy;
gsize stack_bottom = (gsize)&dummy;
stack_bottom += 4095;
stack_bottom &= ~4095;
/*g_print ("stackbottom is: %p\n", (char*)stack_bottom);*/
GC_stackbottom = (char*)stack_bottom;
}
#endif
#if !defined(PLATFORM_ANDROID)
/* If GC_no_dls is set to true, GC_find_limit is not called. This causes a seg fault on Android. */
GC_no_dls = TRUE;
#endif
GC_init ();
GC_oom_fn = mono_gc_out_of_memory;
GC_set_warn_proc (mono_gc_warning);
GC_finalize_on_demand = 1;
GC_finalizer_notifier = mono_gc_finalize_notify;
#ifdef HAVE_GC_GCJ_MALLOC
GC_init_gcj_malloc (5, NULL);
#endif
#ifdef HAVE_GC_ALLOW_REGISTER_THREADS
GC_allow_register_threads();
#endif
if ((env = g_getenv ("MONO_GC_PARAMS"))) {
char **ptr, **opts = g_strsplit (env, ",", -1);
for (ptr = opts; *ptr; ++ptr) {
char *opt = *ptr;
if (g_str_has_prefix (opt, "max-heap-size=")) {
glong max_heap;
opt = strchr (opt, '=') + 1;
if (*opt && mono_gc_parse_environment_string_extract_number (opt, &max_heap)) {
if (max_heap < MIN_BOEHM_MAX_HEAP_SIZE) {
fprintf (stderr, "max-heap-size must be at least %dMb.\n", MIN_BOEHM_MAX_HEAP_SIZE_IN_MB);
exit (1);
}
GC_set_max_heap_size (max_heap);
} else {
fprintf (stderr, "max-heap-size must be an integer.\n");
exit (1);
}
continue;
} else if (g_str_has_prefix (opt, "toggleref-test")) {
register_test_toggleref_callback ();
continue;
} else {
/* Could be a parameter for sgen */
/*
fprintf (stderr, "MONO_GC_PARAMS must be a comma-delimited list of one or more of the following:\n");
fprintf (stderr, " max-heap-size=N (where N is an integer, possibly with a k, m or a g suffix)\n");
exit (1);
*/
}
}
g_strfreev (opts);
}
memset (&cb, 0, sizeof (cb));
cb.thread_register = boehm_thread_register;
cb.thread_unregister = boehm_thread_unregister;
cb.mono_method_is_critical = (gpointer)mono_runtime_is_critical_method;
#ifndef HOST_WIN32
cb.thread_exit = mono_gc_pthread_exit;
cb.mono_gc_pthread_create = (gpointer)mono_gc_pthread_create;
#endif
mono_threads_init (&cb, sizeof (MonoThreadInfo));
mono_mutex_init (&mono_gc_lock);
mono_thread_info_attach (&dummy);
mono_gc_enable_events ();
gc_initialized = TRUE;
}
void
mono_thread_pool_init (void)
{
gint threads_per_cpu = 1;
gint thread_count;
gint cpu_count = mono_cpu_count ();
int result;
if (tp_inited == 2)
return;
result = InterlockedCompareExchange (&tp_inited, 1, 0);
if (result == 1) {
while (1) {
SleepEx (1, FALSE);
if (tp_inited == 2)
return;
}
}
MONO_GC_REGISTER_ROOT_FIXED (socket_io_data.sock_to_state);
mono_mutex_init_recursive (&socket_io_data.io_lock);
if (g_getenv ("MONO_THREADS_PER_CPU") != NULL) {
threads_per_cpu = atoi (g_getenv ("MONO_THREADS_PER_CPU"));
if (threads_per_cpu < 1)
threads_per_cpu = 1;
}
thread_count = MIN (cpu_count * threads_per_cpu, 100 * cpu_count);
threadpool_init (&async_tp, thread_count, MAX (100 * cpu_count, thread_count), async_invoke_thread);
threadpool_init (&async_io_tp, cpu_count * 2, cpu_count * 4, async_invoke_thread);
async_io_tp.is_io = TRUE;
async_call_klass = mono_class_from_name (mono_defaults.corlib, "System", "MonoAsyncCall");
g_assert (async_call_klass);
mono_mutex_init (&threads_lock);
threads = g_ptr_array_sized_new (thread_count);
g_assert (threads);
mono_mutex_init_recursive (&wsqs_lock);
wsqs = g_ptr_array_sized_new (MAX (100 * cpu_count, thread_count));
#ifndef DISABLE_PERFCOUNTERS
async_tp.pc_nitems = init_perf_counter ("Mono Threadpool", "Work Items Added");
g_assert (async_tp.pc_nitems);
async_io_tp.pc_nitems = init_perf_counter ("Mono Threadpool", "IO Work Items Added");
g_assert (async_io_tp.pc_nitems);
async_tp.pc_nthreads = init_perf_counter ("Mono Threadpool", "# of Threads");
g_assert (async_tp.pc_nthreads);
async_io_tp.pc_nthreads = init_perf_counter ("Mono Threadpool", "# of IO Threads");
g_assert (async_io_tp.pc_nthreads);
#endif
tp_inited = 2;
#ifdef DEBUG
signal (SIGALRM, signal_handler);
alarm (2);
#endif
MONO_SEM_INIT (&monitor_sem, 0);
monitor_state = MONITOR_STATE_AWAKE;
monitor_njobs = 0;
}
