2 * sgen-protocol.c: Binary protocol of internal activity, to aid
5 * Copyright 2001-2003 Ximian, Inc
6 * Copyright 2003-2010 Novell, Inc.
7 * Copyright (C) 2012 Xamarin Inc
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License 2.0 as published by the Free Software Foundation;
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License 2.0 along with this library; if not, write to the Free
20 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include "sgen-protocol.h"
28 #include "sgen-memory-governor.h"
29 #include "utils/mono-mmap.h"
31 #ifdef SGEN_BINARY_PROTOCOL
33 /* If not null, dump binary protocol to this file */
34 static FILE *binary_protocol_file = NULL;
36 /* We set this to -1 to indicate an exclusive lock */
37 static volatile int binary_protocol_use_count = 0;
39 #define BINARY_PROTOCOL_BUFFER_SIZE (65536 - 2 * 8)
41 typedef struct _BinaryProtocolBuffer BinaryProtocolBuffer;
42 struct _BinaryProtocolBuffer {
43 BinaryProtocolBuffer * volatile next;
45 unsigned char buffer [BINARY_PROTOCOL_BUFFER_SIZE];
48 static BinaryProtocolBuffer * volatile binary_protocol_buffers = NULL;
51 binary_protocol_init (const char *filename)
53 binary_protocol_file = fopen (filename, "w");
57 binary_protocol_is_enabled (void)
59 return binary_protocol_file != NULL;
63 try_lock_exclusive (void)
66 if (binary_protocol_use_count)
68 } while (InterlockedCompareExchange (&binary_protocol_use_count, -1, 0) != 0);
69 mono_memory_barrier ();
74 unlock_exclusive (void)
76 mono_memory_barrier ();
77 SGEN_ASSERT (0, binary_protocol_use_count == -1, "Exclusively locked count must be -1");
78 if (InterlockedCompareExchange (&binary_protocol_use_count, 0, -1) != -1)
79 SGEN_ASSERT (0, FALSE, "Somebody messed with the exclusive lock");
88 old_count = binary_protocol_use_count;
90 /* Exclusively locked - retry */
91 /* FIXME: short back-off */
94 } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count + 1, old_count) != old_count);
95 mono_memory_barrier ();
99 unlock_recursive (void)
102 mono_memory_barrier ();
104 old_count = binary_protocol_use_count;
105 SGEN_ASSERT (0, old_count > 0, "Locked use count must be at least 1");
106 } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count - 1, old_count) != old_count);
110 binary_protocol_flush_buffer (BinaryProtocolBuffer *buffer)
112 g_assert (buffer->index > 0);
113 fwrite (buffer->buffer, 1, buffer->index, binary_protocol_file);
115 sgen_free_os_memory (buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
119 binary_protocol_flush_buffers (gboolean force)
121 int num_buffers = 0, i;
122 BinaryProtocolBuffer *buf;
123 BinaryProtocolBuffer **bufs;
125 if (!binary_protocol_file)
128 if (!force && !try_lock_exclusive ())
131 for (buf = binary_protocol_buffers; buf != NULL; buf = buf->next)
133 bufs = sgen_alloc_internal_dynamic (num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL, TRUE);
134 for (buf = binary_protocol_buffers, i = 0; buf != NULL; buf = buf->next, i++)
136 SGEN_ASSERT (0, i == num_buffers, "Binary protocol buffer count error");
138 binary_protocol_buffers = NULL;
140 for (i = num_buffers - 1; i >= 0; --i)
141 binary_protocol_flush_buffer (bufs [i]);
143 sgen_free_internal_dynamic (buf, num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL);
148 fflush (binary_protocol_file);
151 static BinaryProtocolBuffer*
152 binary_protocol_get_buffer (int length)
154 BinaryProtocolBuffer *buffer, *new_buffer;
157 buffer = binary_protocol_buffers;
158 if (buffer && buffer->index + length <= BINARY_PROTOCOL_BUFFER_SIZE)
161 new_buffer = sgen_alloc_os_memory (sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, "debugging memory");
162 new_buffer->next = buffer;
163 new_buffer->index = 0;
165 if (InterlockedCompareExchangePointer ((void**)&binary_protocol_buffers, new_buffer, buffer) != buffer) {
166 sgen_free_os_memory (new_buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
175 protocol_entry (unsigned char type, gpointer data, int size)
178 BinaryProtocolBuffer *buffer;
180 if (!binary_protocol_file)
186 buffer = binary_protocol_get_buffer (size + 1);
188 index = buffer->index;
189 if (index + 1 + size > BINARY_PROTOCOL_BUFFER_SIZE)
192 if (InterlockedCompareExchange (&buffer->index, index + 1 + size, index) != index)
193 goto retry_same_buffer;
195 /* FIXME: if we're interrupted at this point, we have a buffer
196 entry that contains random data. */
198 buffer->buffer [index++] = type;
199 memcpy (buffer->buffer + index, data, size);
202 g_assert (index <= BINARY_PROTOCOL_BUFFER_SIZE);
208 binary_protocol_collection_force (int generation)
210 SGenProtocolCollectionForce entry = { generation };
211 binary_protocol_flush_buffers (FALSE);
212 protocol_entry (SGEN_PROTOCOL_COLLECTION_FORCE, &entry, sizeof (SGenProtocolCollectionForce));
216 binary_protocol_collection_begin (int index, int generation)
218 SGenProtocolCollection entry = { index, generation };
219 binary_protocol_flush_buffers (FALSE);
220 protocol_entry (SGEN_PROTOCOL_COLLECTION_BEGIN, &entry, sizeof (SGenProtocolCollection));
224 binary_protocol_collection_end (int index, int generation)
226 SGenProtocolCollection entry = { index, generation };
227 binary_protocol_flush_buffers (FALSE);
228 protocol_entry (SGEN_PROTOCOL_COLLECTION_END, &entry, sizeof (SGenProtocolCollection));
232 binary_protocol_alloc (gpointer obj, gpointer vtable, int size)
234 SGenProtocolAlloc entry = { obj, vtable, size };
235 protocol_entry (SGEN_PROTOCOL_ALLOC, &entry, sizeof (SGenProtocolAlloc));
239 binary_protocol_alloc_pinned (gpointer obj, gpointer vtable, int size)
241 SGenProtocolAlloc entry = { obj, vtable, size };
242 protocol_entry (SGEN_PROTOCOL_ALLOC_PINNED, &entry, sizeof (SGenProtocolAlloc));
246 binary_protocol_alloc_degraded (gpointer obj, gpointer vtable, int size)
248 SGenProtocolAlloc entry = { obj, vtable, size };
249 protocol_entry (SGEN_PROTOCOL_ALLOC_DEGRADED, &entry, sizeof (SGenProtocolAlloc));
253 binary_protocol_copy (gpointer from, gpointer to, gpointer vtable, int size)
255 SGenProtocolCopy entry = { from, to, vtable, size };
256 protocol_entry (SGEN_PROTOCOL_COPY, &entry, sizeof (SGenProtocolCopy));
260 binary_protocol_pin (gpointer obj, gpointer vtable, int size)
262 SGenProtocolPin entry = { obj, vtable, size };
263 protocol_entry (SGEN_PROTOCOL_PIN, &entry, sizeof (SGenProtocolPin));
267 binary_protocol_mark (gpointer obj, gpointer vtable, int size)
269 SGenProtocolMark entry = { obj, vtable, size };
270 protocol_entry (SGEN_PROTOCOL_MARK, &entry, sizeof (SGenProtocolMark));
274 binary_protocol_scan_begin (gpointer obj, gpointer vtable, int size)
276 SGenProtocolScanBegin entry = { obj, vtable, size };
277 protocol_entry (SGEN_PROTOCOL_SCAN_BEGIN, &entry, sizeof (SGenProtocolScanBegin));
281 binary_protocol_scan_vtype_begin (gpointer obj, int size)
283 SGenProtocolScanVTypeBegin entry = { obj, size };
284 protocol_entry (SGEN_PROTOCOL_SCAN_VTYPE_BEGIN, &entry, sizeof (SGenProtocolScanVTypeBegin));
288 binary_protocol_wbarrier (gpointer ptr, gpointer value, gpointer value_vtable)
290 SGenProtocolWBarrier entry = { ptr, value, value_vtable };
291 protocol_entry (SGEN_PROTOCOL_WBARRIER, &entry, sizeof (SGenProtocolWBarrier));
295 binary_protocol_global_remset (gpointer ptr, gpointer value, gpointer value_vtable)
297 SGenProtocolGlobalRemset entry = { ptr, value, value_vtable };
298 protocol_entry (SGEN_PROTOCOL_GLOBAL_REMSET, &entry, sizeof (SGenProtocolGlobalRemset));
302 binary_protocol_ptr_update (gpointer ptr, gpointer old_value, gpointer new_value, gpointer vtable, int size)
304 SGenProtocolPtrUpdate entry = { ptr, old_value, new_value, vtable, size };
305 protocol_entry (SGEN_PROTOCOL_PTR_UPDATE, &entry, sizeof (SGenProtocolPtrUpdate));
309 binary_protocol_cleanup (gpointer ptr, gpointer vtable, int size)
311 SGenProtocolCleanup entry = { ptr, vtable, size };
312 protocol_entry (SGEN_PROTOCOL_CLEANUP, &entry, sizeof (SGenProtocolCleanup));
316 binary_protocol_empty (gpointer start, int size)
318 SGenProtocolEmpty entry = { start, size };
319 protocol_entry (SGEN_PROTOCOL_EMPTY, &entry, sizeof (SGenProtocolEmpty));
323 binary_protocol_thread_suspend (gpointer thread, gpointer stopped_ip)
325 SGenProtocolThreadSuspend entry = { thread, stopped_ip };
326 protocol_entry (SGEN_PROTOCOL_THREAD_SUSPEND, &entry, sizeof (SGenProtocolThreadSuspend));
330 binary_protocol_thread_restart (gpointer thread)
332 SGenProtocolThreadRestart entry = { thread };
333 protocol_entry (SGEN_PROTOCOL_THREAD_RESTART, &entry, sizeof (SGenProtocolThreadRestart));
337 binary_protocol_thread_register (gpointer thread)
339 SGenProtocolThreadRegister entry = { thread };
340 protocol_entry (SGEN_PROTOCOL_THREAD_REGISTER, &entry, sizeof (SGenProtocolThreadRegister));
345 binary_protocol_thread_unregister (gpointer thread)
347 SGenProtocolThreadUnregister entry = { thread };
348 protocol_entry (SGEN_PROTOCOL_THREAD_UNREGISTER, &entry, sizeof (SGenProtocolThreadUnregister));
353 binary_protocol_missing_remset (gpointer obj, gpointer obj_vtable, int offset, gpointer value, gpointer value_vtable, int value_pinned)
355 SGenProtocolMissingRemset entry = { obj, obj_vtable, offset, value, value_vtable, value_pinned };
356 protocol_entry (SGEN_PROTOCOL_MISSING_REMSET, &entry, sizeof (SGenProtocolMissingRemset));
361 binary_protocol_card_scan (gpointer start, int size)
363 SGenProtocolCardScan entry = { start, size };
364 protocol_entry (SGEN_PROTOCOL_CARD_SCAN, &entry, sizeof (SGenProtocolCardScan));
368 binary_protocol_cement (gpointer obj, gpointer vtable, int size)
370 SGenProtocolCement entry = { obj, vtable, size };
371 protocol_entry (SGEN_PROTOCOL_CEMENT, &entry, sizeof (SGenProtocolCement));
375 binary_protocol_cement_reset (void)
377 protocol_entry (SGEN_PROTOCOL_CEMENT_RESET, NULL, 0);
381 binary_protocol_dislink_update (gpointer link, gpointer obj, int track, int staged)
383 SGenProtocolDislinkUpdate entry = { link, obj, track, staged };
384 protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE, &entry, sizeof (SGenProtocolDislinkUpdate));
388 binary_protocol_dislink_update_staged (gpointer link, gpointer obj, int track, int index)
390 SGenProtocolDislinkUpdateStaged entry = { link, obj, track, index };
391 protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE_STAGED, &entry, sizeof (SGenProtocolDislinkUpdateStaged));
395 binary_protocol_dislink_process_staged (gpointer link, gpointer obj, int index)
397 SGenProtocolDislinkProcessStaged entry = { link, obj, index };
398 protocol_entry (SGEN_PROTOCOL_DISLINK_PROCESS_STAGED, &entry, sizeof (SGenProtocolDislinkProcessStaged));
402 binary_protocol_domain_unload_begin (gpointer domain)
404 SGenProtocolDomainUnload entry = { domain };
405 protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_BEGIN, &entry, sizeof (SGenProtocolDomainUnload));
409 binary_protocol_domain_unload_end (gpointer domain)
411 SGenProtocolDomainUnload entry = { domain };
412 protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_END, &entry, sizeof (SGenProtocolDomainUnload));
417 #endif /* HAVE_SGEN_GC */