/*
+ * sgen-protocol.c: Binary protocol of internal activity, to aid
+ * debugging.
+ *
* Copyright 2001-2003 Ximian, Inc
* Copyright 2003-2010 Novell, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * Copyright (C) 2012 Xamarin Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License 2.0 as published by the Free Software Foundation;
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License 2.0 along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#ifdef HAVE_SGEN_GC
+
#include "config.h"
+#include "sgen-gc.h"
#include "sgen-protocol.h"
+#include "sgen-memory-governor.h"
+#include "utils/mono-mmap.h"
+#include "utils/mono-threads.h"
#ifdef SGEN_BINARY_PROTOCOL
/* If not null, dump binary protocol to this file */
static FILE *binary_protocol_file = NULL;
-static int binary_protocol_use_count = 0;
+/* We set this to -1 to indicate an exclusive lock */
+static volatile int binary_protocol_use_count = 0;
#define BINARY_PROTOCOL_BUFFER_SIZE (65536 - 2 * 8)
typedef struct _BinaryProtocolBuffer BinaryProtocolBuffer;
struct _BinaryProtocolBuffer {
- BinaryProtocolBuffer *next;
- int index;
+ BinaryProtocolBuffer * volatile next;
+ volatile int index;
unsigned char buffer [BINARY_PROTOCOL_BUFFER_SIZE];
};
-static BinaryProtocolBuffer *binary_protocol_buffers = NULL;
+static BinaryProtocolBuffer * volatile binary_protocol_buffers = NULL;
void
binary_protocol_init (const char *filename)
return binary_protocol_file != NULL;
}
+static gboolean
+try_lock_exclusive (void)
+{
+ do {
+ if (binary_protocol_use_count)
+ return FALSE;
+ } while (InterlockedCompareExchange (&binary_protocol_use_count, -1, 0) != 0);
+ mono_memory_barrier ();
+ return TRUE;
+}
+
static void
-binary_protocol_flush_buffers_rec (BinaryProtocolBuffer *buffer)
+unlock_exclusive (void)
{
- if (!buffer)
- return;
+ mono_memory_barrier ();
+ SGEN_ASSERT (0, binary_protocol_use_count == -1, "Exclusively locked count must be -1");
+ if (InterlockedCompareExchange (&binary_protocol_use_count, 0, -1) != -1)
+ SGEN_ASSERT (0, FALSE, "Somebody messed with the exclusive lock");
+}
+
+static void
+lock_recursive (void)
+{
+ int old_count;
+ do {
+ retry:
+ old_count = binary_protocol_use_count;
+ if (old_count < 0) {
+ /* Exclusively locked - retry */
+ /* FIXME: short back-off */
+ goto retry;
+ }
+ } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count + 1, old_count) != old_count);
+ mono_memory_barrier ();
+}
- binary_protocol_flush_buffers_rec (buffer->next);
+static void
+unlock_recursive (void)
+{
+ int old_count;
+ mono_memory_barrier ();
+ do {
+ old_count = binary_protocol_use_count;
+ SGEN_ASSERT (0, old_count > 0, "Locked use count must be at least 1");
+ } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count - 1, old_count) != old_count);
+}
+static void
+binary_protocol_flush_buffer (BinaryProtocolBuffer *buffer)
+{
g_assert (buffer->index > 0);
fwrite (buffer->buffer, 1, buffer->index, binary_protocol_file);
- sgen_free_os_memory (buffer, sizeof (BinaryProtocolBuffer));
+ sgen_free_os_memory (buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
}
void
binary_protocol_flush_buffers (gboolean force)
{
+ int num_buffers = 0, i;
+ BinaryProtocolBuffer *buf;
+ BinaryProtocolBuffer **bufs;
+
if (!binary_protocol_file)
return;
- if (!force && binary_protocol_use_count != 0)
+ if (!force && !try_lock_exclusive ())
return;
- binary_protocol_flush_buffers_rec (binary_protocol_buffers);
+ for (buf = binary_protocol_buffers; buf != NULL; buf = buf->next)
+ ++num_buffers;
+ bufs = sgen_alloc_internal_dynamic (num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL, TRUE);
+ for (buf = binary_protocol_buffers, i = 0; buf != NULL; buf = buf->next, i++)
+ bufs [i] = buf;
+ SGEN_ASSERT (0, i == num_buffers, "Binary protocol buffer count error");
+
binary_protocol_buffers = NULL;
+ for (i = num_buffers - 1; i >= 0; --i)
+ binary_protocol_flush_buffer (bufs [i]);
+
+ sgen_free_internal_dynamic (buf, num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL);
+
+ if (!force)
+ unlock_exclusive ();
+
fflush (binary_protocol_file);
}
if (buffer && buffer->index + length <= BINARY_PROTOCOL_BUFFER_SIZE)
return buffer;
- new_buffer = sgen_alloc_os_memory (sizeof (BinaryProtocolBuffer), TRUE, "debugging memory");
+ new_buffer = sgen_alloc_os_memory (sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, "debugging memory");
new_buffer->next = buffer;
new_buffer->index = 0;
if (InterlockedCompareExchangePointer ((void**)&binary_protocol_buffers, new_buffer, buffer) != buffer) {
- sgen_free_os_memory (new_buffer, sizeof (BinaryProtocolBuffer));
+ sgen_free_os_memory (new_buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
goto retry;
}
{
int index;
BinaryProtocolBuffer *buffer;
- int old_count;
if (!binary_protocol_file)
return;
- do {
- old_count = binary_protocol_use_count;
- g_assert (old_count >= 0);
- } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count + 1, old_count) != old_count);
+ if (sgen_is_worker_thread (mono_native_thread_id_get ()))
+ type |= 0x80;
+
+ lock_recursive ();
retry:
buffer = binary_protocol_get_buffer (size + 1);
g_assert (index <= BINARY_PROTOCOL_BUFFER_SIZE);
- do {
- old_count = binary_protocol_use_count;
- g_assert (old_count > 0);
- } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count - 1, old_count) != old_count);
+ unlock_recursive ();
+}
+
+void
+binary_protocol_collection_force (int generation)
+{
+ SGenProtocolCollectionForce entry = { generation };
+ binary_protocol_flush_buffers (FALSE);
+ protocol_entry (SGEN_PROTOCOL_COLLECTION_FORCE, &entry, sizeof (SGenProtocolCollectionForce));
+}
+
+void
+binary_protocol_collection_begin (int index, int generation)
+{
+ SGenProtocolCollection entry = { index, generation };
+ binary_protocol_flush_buffers (FALSE);
+ protocol_entry (SGEN_PROTOCOL_COLLECTION_BEGIN, &entry, sizeof (SGenProtocolCollection));
}
void
-binary_protocol_collection (int generation)
+binary_protocol_collection_end (int index, int generation)
{
- SGenProtocolCollection entry = { generation };
+ SGenProtocolCollection entry = { index, generation };
binary_protocol_flush_buffers (FALSE);
- protocol_entry (SGEN_PROTOCOL_COLLECTION, &entry, sizeof (SGenProtocolCollection));
+ protocol_entry (SGEN_PROTOCOL_COLLECTION_END, &entry, sizeof (SGenProtocolCollection));
}
void
protocol_entry (SGEN_PROTOCOL_MARK, &entry, sizeof (SGenProtocolMark));
}
+void
+binary_protocol_scan_begin (gpointer obj, gpointer vtable, int size)
+{
+ SGenProtocolScanBegin entry = { obj, vtable, size };
+ protocol_entry (SGEN_PROTOCOL_SCAN_BEGIN, &entry, sizeof (SGenProtocolScanBegin));
+}
+
+void
+binary_protocol_scan_vtype_begin (gpointer obj, int size)
+{
+ SGenProtocolScanVTypeBegin entry = { obj, size };
+ protocol_entry (SGEN_PROTOCOL_SCAN_VTYPE_BEGIN, &entry, sizeof (SGenProtocolScanVTypeBegin));
+}
+
void
binary_protocol_wbarrier (gpointer ptr, gpointer value, gpointer value_vtable)
{
protocol_entry (SGEN_PROTOCOL_EMPTY, &entry, sizeof (SGenProtocolEmpty));
}
+void
+binary_protocol_thread_suspend (gpointer thread, gpointer stopped_ip)
+{
+ SGenProtocolThreadSuspend entry = { thread, stopped_ip };
+ protocol_entry (SGEN_PROTOCOL_THREAD_SUSPEND, &entry, sizeof (SGenProtocolThreadSuspend));
+}
+
void
binary_protocol_thread_restart (gpointer thread)
{
SGenProtocolThreadRestart entry = { thread };
protocol_entry (SGEN_PROTOCOL_THREAD_RESTART, &entry, sizeof (SGenProtocolThreadRestart));
-
}
void
}
+void
+binary_protocol_card_scan (gpointer start, int size)
+{
+ SGenProtocolCardScan entry = { start, size };
+ protocol_entry (SGEN_PROTOCOL_CARD_SCAN, &entry, sizeof (SGenProtocolCardScan));
+}
+
+void
+binary_protocol_cement (gpointer obj, gpointer vtable, int size)
+{
+ SGenProtocolCement entry = { obj, vtable, size };
+ protocol_entry (SGEN_PROTOCOL_CEMENT, &entry, sizeof (SGenProtocolCement));
+}
+
+void
+binary_protocol_cement_reset (void)
+{
+ protocol_entry (SGEN_PROTOCOL_CEMENT_RESET, NULL, 0);
+}
+
+void
+binary_protocol_dislink_update (gpointer link, gpointer obj, int track, int staged)
+{
+ SGenProtocolDislinkUpdate entry = { link, obj, track, staged };
+ protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE, &entry, sizeof (SGenProtocolDislinkUpdate));
+}
+
+void
+binary_protocol_dislink_update_staged (gpointer link, gpointer obj, int track, int index)
+{
+ SGenProtocolDislinkUpdateStaged entry = { link, obj, track, index };
+ protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE_STAGED, &entry, sizeof (SGenProtocolDislinkUpdateStaged));
+}
+
+void
+binary_protocol_dislink_process_staged (gpointer link, gpointer obj, int index)
+{
+ SGenProtocolDislinkProcessStaged entry = { link, obj, index };
+ protocol_entry (SGEN_PROTOCOL_DISLINK_PROCESS_STAGED, &entry, sizeof (SGenProtocolDislinkProcessStaged));
+}
+
+void
+binary_protocol_domain_unload_begin (gpointer domain)
+{
+ SGenProtocolDomainUnload entry = { domain };
+ protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_BEGIN, &entry, sizeof (SGenProtocolDomainUnload));
+}
+
+void
+binary_protocol_domain_unload_end (gpointer domain)
+{
+ SGenProtocolDomainUnload entry = { domain };
+ protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_END, &entry, sizeof (SGenProtocolDomainUnload));
+}
+
#endif
+
+#endif /* HAVE_SGEN_GC */
projects / mono.git / blobdiff