*
* Copyright 2002-2003 Ximian, Inc (http://www.ximian.com)
* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
+ * Copyright 2012 Xamarin Inc (http://www.xamarin.com)
*/
#include <config.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/mono-mlist.h>
#include <mono/metadata/threadpool.h>
+#include <mono/metadata/threadpool-internals.h>
#include <mono/metadata/threads-types.h>
#include <mono/utils/mono-logger-internal.h>
#include <mono/metadata/gc-internal.h>
#include <mono/metadata/attach.h>
#include <mono/metadata/console-io.h>
#include <mono/utils/mono-semaphore.h>
+#include <mono/utils/mono-memory-model.h>
+#include <mono/utils/mono-counters.h>
#ifndef HOST_WIN32
#include <pthread.h>
static HANDLE shutdown_event;
#endif
+GCStats gc_stats;
+
static void
add_thread_to_finalize (MonoInternalThread *thread)
{
runtime_invoke (o, NULL, &exc, NULL);
- if (exc) {
- /* fixme: do something useful */
- }
+ if (exc)
+ mono_internal_thread_unhandled_exception (exc);
mono_domain_set_internal (caller_domain);
}
/* Avoid deadlocks */
return;
+ /*
+ If the finalizer thread is not live, lets pretend no finalizers are pending since the current thread might
+ be the one responsible for starting it up.
+ */
+ if (gc_thread == NULL)
+ return;
+
ResetEvent (pending_done_event);
mono_gc_finalize_notify ();
/* g_print ("Waiting for pending finalizers....\n"); */
return -1;
}
+static void*
+make_root_descr_all_refs (int numbits, gboolean pinned)
+{
+#ifdef HAVE_SGEN_GC
+ if (pinned)
+ return NULL;
+#endif
+ return mono_gc_make_root_descr_all_refs (numbits);
+}
+
static guint32
alloc_handle (HandleData *handles, MonoObject *obj, gboolean track)
{
if (!handles->size) {
handles->size = 32;
if (handles->type > HANDLE_WEAK_TRACK) {
- handles->entries = mono_gc_alloc_fixed (sizeof (gpointer) * handles->size, mono_gc_make_root_descr_all_refs (handles->size));
+ handles->entries = mono_gc_alloc_fixed (sizeof (gpointer) * handles->size, make_root_descr_all_refs (handles->size, handles->type == HANDLE_PINNED));
} else {
handles->entries = g_malloc0 (sizeof (gpointer) * handles->size);
handles->domain_ids = g_malloc0 (sizeof (guint16) * handles->size);
if (handles->type > HANDLE_WEAK_TRACK) {
gpointer *entries;
- entries = mono_gc_alloc_fixed (sizeof (gpointer) * new_size, mono_gc_make_root_descr_all_refs (new_size));
- memcpy (entries, handles->entries, sizeof (gpointer) * handles->size);
+ entries = mono_gc_alloc_fixed (sizeof (gpointer) * new_size, make_root_descr_all_refs (new_size, handles->type == HANDLE_PINNED));
+ mono_gc_memmove (entries, handles->entries, sizeof (gpointer) * handles->size);
mono_gc_free_fixed (handles->entries);
handles->entries = entries;
entries = g_malloc (sizeof (gpointer) * new_size);
/* we disable GC because we could lose some disappearing link updates */
mono_gc_disable ();
- memcpy (entries, handles->entries, sizeof (gpointer) * handles->size);
- memset (entries + handles->size, 0, sizeof (gpointer) * handles->size);
+ mono_gc_memmove (entries, handles->entries, sizeof (gpointer) * handles->size);
+ mono_gc_bzero (entries + handles->size, sizeof (gpointer) * handles->size);
memcpy (domain_ids, handles->domain_ids, sizeof (guint16) * handles->size);
for (i = 0; i < handles->size; ++i) {
MonoObject *obj = mono_gc_weak_link_get (&(handles->entries [i]));
mono_gc_weak_link_add (&(handles->entries [slot]), obj, track);
}
+#ifndef DISABLE_PERFCOUNTERS
mono_perfcounters->gc_num_handles++;
+#endif
unlock_handles (handles);
/*g_print ("allocated entry %d of type %d to object %p (in slot: %p)\n", slot, handles->type, obj, handles->entries [slot]);*/
res = (slot << 3) | (handles->type + 1);
} else {
/* print a warning? */
}
+#ifndef DISABLE_PERFCOUNTERS
mono_perfcounters->gc_num_handles--;
+#endif
/*g_print ("freed entry %d of type %d\n", slot, handles->type);*/
unlock_handles (handles);
mono_profiler_gc_handle (MONO_PROFILER_GC_HANDLE_DESTROYED, handles->type, gchandle, NULL);
{
MonoDomain *domain = req->domain;
+#if HAVE_SGEN_GC
+#define NUM_FOBJECTS 64
+ MonoObject *to_finalize [NUM_FOBJECTS];
+ int count;
+#endif
+
+ /* Process finalizers which are already in the queue */
+ mono_gc_invoke_finalizers ();
+
#ifdef HAVE_BOEHM_GC
while (g_hash_table_size (domain->finalizable_objects_hash) > 0) {
int i;
g_ptr_array_free (objs, TRUE);
}
#elif defined(HAVE_SGEN_GC)
-#define NUM_FOBJECTS 64
- MonoObject *to_finalize [NUM_FOBJECTS];
- int count;
while ((count = mono_gc_finalizers_for_domain (domain, to_finalize, NUM_FOBJECTS))) {
int i;
for (i = 0; i < count; ++i) {
}
#endif
- /* Process finalizers which are already in the queue */
- mono_gc_invoke_finalizers ();
-
/* cleanup the reference queue */
reference_queue_clear_for_domain (domain);
return 0;
}
+#ifndef LAZY_GC_THREAD_CREATION
+static
+#endif
+void
+mono_gc_init_finalizer_thread (void)
+{
+ gc_thread = mono_thread_create_internal (mono_domain_get (), finalizer_thread, NULL, FALSE, 0);
+ ves_icall_System_Threading_Thread_SetName_internal (gc_thread, mono_string_new (mono_domain_get (), "Finalizer"));
+}
+
void
mono_gc_init (void)
{
MONO_GC_REGISTER_ROOT_FIXED (gc_handles [HANDLE_NORMAL].entries);
MONO_GC_REGISTER_ROOT_FIXED (gc_handles [HANDLE_PINNED].entries);
+ mono_counters_register ("Minor GC collections", MONO_COUNTER_GC | MONO_COUNTER_INT, &gc_stats.minor_gc_count);
+ mono_counters_register ("Major GC collections", MONO_COUNTER_GC | MONO_COUNTER_INT, &gc_stats.major_gc_count);
+ mono_counters_register ("Minor GC time", MONO_COUNTER_GC | MONO_COUNTER_TIME_INTERVAL, &gc_stats.minor_gc_time_usecs);
+ mono_counters_register ("Major GC time", MONO_COUNTER_GC | MONO_COUNTER_TIME_INTERVAL, &gc_stats.major_gc_time_usecs);
+
mono_gc_base_init ();
if (mono_gc_is_disabled ()) {
MONO_SEM_INIT (&finalizer_sem, 0);
#endif
- gc_thread = mono_thread_create_internal (mono_domain_get (), finalizer_thread, NULL, FALSE, 0);
- ves_icall_System_Threading_Thread_SetName_internal (gc_thread, mono_string_new (mono_domain_get (), "Finalizer"));
+#ifndef LAZY_GC_THREAD_CREATION
+ mono_gc_init_finalizer_thread ();
+#endif
}
void
gboolean is_suffix = FALSE;
char suffix;
- switch (str [len - 1]) {
+ if (!len)
+ return FALSE;
+
+ suffix = str [len - 1];
+
+ switch (suffix) {
case 'g':
case 'G':
shift += 10;
case 'K':
shift += 10;
is_suffix = TRUE;
- suffix = str [len - 1];
break;
default:
- return FALSE;
+ if (!isdigit (suffix))
+ return FALSE;
+ break;
}
errno = 0;
return FALSE;
if (is_suffix) {
+ gulong unshifted;
+
+ if (val < 0) /* negative numbers cannot be suffixed */
+ return FALSE;
if (*(endptr + 1)) /* Invalid string. */
return FALSE;
+
+ unshifted = (gulong)val;
val <<= shift;
+ if (val < 0) /* overflow */
+ return FALSE;
+ if (((gulong)val >> shift) != unshifted) /* value too large */
+ return FALSE;
}
*out = val;
do {
current = *head;
value->next = current;
+ STORE_STORE_FENCE; /*Must make sure the previous store is visible before the CAS. */
} while (InterlockedCompareExchangePointer ((void*)head, value, current) != current);
}
* @callback callback used when processing dead entries.
*
* Create a new reference queue used to process collected objects.
- * A reference queue let you queue the pair (managed object, user data).
+ * A reference queue let you queue a pair (managed object, user data)
+ * using the mono_gc_reference_queue_add method.
+ *
* Once the managed object is collected @callback will be called
* in the finalizer thread with 'user data' as argument.
*
* @obj the object to be watched for collection
* @user_data parameter to be passed to the queue callback
*
- * Queue an object to be watched for collection.
+ * Queue an object to be watched for collection, when the @obj is
+ * collected, the callback that was registered for the @queue will
+ * be invoked with the @obj and @user_data arguments.
*
* @returns false if the queue is scheduled to be freed.
*/
#define align_up(ptr) ((void*) ((_toi(ptr) + ptr_mask) & ~ptr_mask))
/**
+ * mono_gc_bzero:
+ * @dest: address to start to clear
+ * @size: size of the region to clear
+ *
* Zero @size bytes starting at @dest.
*
* Use this to zero memory that can hold managed pointers.
{
char *p = (char*)dest;
char *end = p + size;
- char *align_end = p + unaligned_bytes (p);
+ char *align_end = align_up (p);
char *word_end;
while (p < align_end)
/**
+ * mono_gc_memmove:
+ * @dest: destination of the move
+ * @src: source
+ * @size: size of the block to move
+ *
* Move @size bytes from @src to @dest.
* size MUST be a multiple of sizeof (gpointer)
*
void
mono_gc_memmove (void *dest, const void *src, size_t size)
{
+ /*
+ * If dest and src are differently aligned with respect to
+ * pointer size then it makes no sense to do aligned copying.
+ * In fact, we would end up with unaligned loads which is
+ * incorrect on some architectures.
+ */
+ if ((char*)dest - (char*)align_down (dest) != (char*)src - (char*)align_down (src)) {
+ memmove (dest, src, size);
+ return;
+ }
+
/*
* A bit of explanation on why we align only dest before doing word copies.
* Pointers to managed objects must always be stored in word aligned addresses, so
char *p = (char*)dest + size;
char *s = (char*)src + size;
char *start = (char*)dest;
- char *align_end = MAX((char*)p, (char*)align_down (p));
+ char *align_end = MAX((char*)dest, (char*)align_down (p));
char *word_start;
while (p > align_end)
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