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"
30 #include "utils/mono-threads.h"
32 /* If not null, dump binary protocol to this file */
33 static FILE *binary_protocol_file = NULL;
35 /* We set this to -1 to indicate an exclusive lock */
36 static volatile int binary_protocol_use_count = 0;
38 #define BINARY_PROTOCOL_BUFFER_SIZE (65536 - 2 * 8)
40 typedef struct _BinaryProtocolBuffer BinaryProtocolBuffer;
41 struct _BinaryProtocolBuffer {
42 BinaryProtocolBuffer * volatile next;
44 unsigned char buffer [BINARY_PROTOCOL_BUFFER_SIZE];
47 static BinaryProtocolBuffer * volatile binary_protocol_buffers = NULL;
49 static char* filename_or_prefix = NULL;
50 static int current_file_index = 0;
51 static long long current_file_size = 0;
52 static long long file_size_limit;
55 filename_for_index (int index)
59 SGEN_ASSERT (0, file_size_limit > 0, "Indexed binary protocol filename must only be used with file size limit");
61 filename = sgen_alloc_internal_dynamic (strlen (filename_or_prefix) + 32, INTERNAL_MEM_BINARY_PROTOCOL, TRUE);
62 sprintf (filename, "%s.%d", filename_or_prefix, index);
68 free_filename (char *filename)
70 SGEN_ASSERT (0, file_size_limit > 0, "Indexed binary protocol filename must only be used with file size limit");
72 sgen_free_internal_dynamic (filename, strlen (filename_or_prefix) + 32, INTERNAL_MEM_BINARY_PROTOCOL);
76 binary_protocol_open_file (void)
80 if (file_size_limit > 0)
81 filename = filename_for_index (current_file_index);
83 filename = filename_or_prefix;
85 binary_protocol_file = fopen (filename, "w");
87 if (file_size_limit > 0)
88 free_filename (filename);
92 binary_protocol_init (const char *filename, long long limit)
94 filename_or_prefix = sgen_alloc_internal_dynamic (strlen (filename) + 1, INTERNAL_MEM_BINARY_PROTOCOL, TRUE);
95 strcpy (filename_or_prefix, filename);
97 file_size_limit = limit;
99 binary_protocol_open_file ();
103 binary_protocol_is_enabled (void)
105 return binary_protocol_file != NULL;
109 try_lock_exclusive (void)
112 if (binary_protocol_use_count)
114 } while (InterlockedCompareExchange (&binary_protocol_use_count, -1, 0) != 0);
115 mono_memory_barrier ();
120 unlock_exclusive (void)
122 mono_memory_barrier ();
123 SGEN_ASSERT (0, binary_protocol_use_count == -1, "Exclusively locked count must be -1");
124 if (InterlockedCompareExchange (&binary_protocol_use_count, 0, -1) != -1)
125 SGEN_ASSERT (0, FALSE, "Somebody messed with the exclusive lock");
129 lock_recursive (void)
134 old_count = binary_protocol_use_count;
136 /* Exclusively locked - retry */
137 /* FIXME: short back-off */
140 } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count + 1, old_count) != old_count);
141 mono_memory_barrier ();
145 unlock_recursive (void)
148 mono_memory_barrier ();
150 old_count = binary_protocol_use_count;
151 SGEN_ASSERT (0, old_count > 0, "Locked use count must be at least 1");
152 } while (InterlockedCompareExchange (&binary_protocol_use_count, old_count - 1, old_count) != old_count);
156 binary_protocol_flush_buffer (BinaryProtocolBuffer *buffer)
158 g_assert (buffer->index > 0);
159 fwrite (buffer->buffer, 1, buffer->index, binary_protocol_file);
160 current_file_size += buffer->index;
162 sgen_free_os_memory (buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
166 binary_protocol_check_file_overflow (void)
168 if (file_size_limit <= 0 || current_file_size < file_size_limit)
171 fclose (binary_protocol_file);
172 binary_protocol_file = NULL;
174 if (current_file_index > 0) {
175 char *filename = filename_for_index (current_file_index - 1);
177 free_filename (filename);
180 ++current_file_index;
181 current_file_size = 0;
183 binary_protocol_open_file ();
187 binary_protocol_flush_buffers (gboolean force)
189 int num_buffers = 0, i;
190 BinaryProtocolBuffer *buf;
191 BinaryProtocolBuffer **bufs;
193 if (!binary_protocol_file)
196 if (!force && !try_lock_exclusive ())
199 for (buf = binary_protocol_buffers; buf != NULL; buf = buf->next)
201 bufs = sgen_alloc_internal_dynamic (num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL, TRUE);
202 for (buf = binary_protocol_buffers, i = 0; buf != NULL; buf = buf->next, i++)
204 SGEN_ASSERT (0, i == num_buffers, "Binary protocol buffer count error");
206 binary_protocol_buffers = NULL;
208 for (i = num_buffers - 1; i >= 0; --i) {
209 binary_protocol_flush_buffer (bufs [i]);
210 binary_protocol_check_file_overflow ();
213 sgen_free_internal_dynamic (buf, num_buffers * sizeof (BinaryProtocolBuffer*), INTERNAL_MEM_BINARY_PROTOCOL);
218 fflush (binary_protocol_file);
221 static BinaryProtocolBuffer*
222 binary_protocol_get_buffer (int length)
224 BinaryProtocolBuffer *buffer, *new_buffer;
227 buffer = binary_protocol_buffers;
228 if (buffer && buffer->index + length <= BINARY_PROTOCOL_BUFFER_SIZE)
231 new_buffer = sgen_alloc_os_memory (sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, "debugging memory");
232 new_buffer->next = buffer;
233 new_buffer->index = 0;
235 if (InterlockedCompareExchangePointer ((void**)&binary_protocol_buffers, new_buffer, buffer) != buffer) {
236 sgen_free_os_memory (new_buffer, sizeof (BinaryProtocolBuffer), SGEN_ALLOC_INTERNAL);
245 protocol_entry (unsigned char type, gpointer data, int size)
248 BinaryProtocolBuffer *buffer;
250 if (!binary_protocol_file)
253 if (sgen_is_worker_thread (mono_native_thread_id_get ()))
259 buffer = binary_protocol_get_buffer (size + 1);
261 index = buffer->index;
262 if (index + 1 + size > BINARY_PROTOCOL_BUFFER_SIZE)
265 if (InterlockedCompareExchange (&buffer->index, index + 1 + size, index) != index)
266 goto retry_same_buffer;
268 /* FIXME: if we're interrupted at this point, we have a buffer
269 entry that contains random data. */
271 buffer->buffer [index++] = type;
272 memcpy (buffer->buffer + index, data, size);
275 g_assert (index <= BINARY_PROTOCOL_BUFFER_SIZE);
281 binary_protocol_collection_force (int generation)
283 SGenProtocolCollectionForce entry = { generation };
284 binary_protocol_flush_buffers (FALSE);
285 protocol_entry (SGEN_PROTOCOL_COLLECTION_FORCE, &entry, sizeof (SGenProtocolCollectionForce));
289 binary_protocol_collection_begin (int index, int generation)
291 SGenProtocolCollection entry = { index, generation };
292 binary_protocol_flush_buffers (FALSE);
293 protocol_entry (SGEN_PROTOCOL_COLLECTION_BEGIN, &entry, sizeof (SGenProtocolCollection));
297 binary_protocol_collection_end (int index, int generation)
299 SGenProtocolCollection entry = { index, generation };
300 binary_protocol_flush_buffers (FALSE);
301 protocol_entry (SGEN_PROTOCOL_COLLECTION_END, &entry, sizeof (SGenProtocolCollection));
305 binary_protocol_concurrent_start (void)
307 protocol_entry (SGEN_PROTOCOL_CONCURRENT_START, NULL, 0);
311 binary_protocol_concurrent_update_finish (void)
313 protocol_entry (SGEN_PROTOCOL_CONCURRENT_UPDATE_FINISH, NULL, 0);
317 binary_protocol_world_stopping (long long timestamp)
319 SGenProtocolWorldStopping entry = { timestamp };
320 protocol_entry (SGEN_PROTOCOL_WORLD_STOPPING, &entry, sizeof (SGenProtocolWorldStopping));
324 binary_protocol_world_stopped (long long timestamp, long long total_major_cards,
325 long long marked_major_cards, long long total_los_cards, long long marked_los_cards)
327 SGenProtocolWorldStopped entry = { timestamp, total_major_cards, marked_major_cards, total_los_cards, marked_los_cards };
328 protocol_entry (SGEN_PROTOCOL_WORLD_STOPPED, &entry, sizeof (SGenProtocolWorldStopped));
332 binary_protocol_world_restarting (int generation, long long timestamp,
333 long long total_major_cards, long long marked_major_cards, long long total_los_cards, long long marked_los_cards)
335 SGenProtocolWorldRestarting entry = { generation, timestamp, total_major_cards, marked_major_cards, total_los_cards, marked_los_cards };
336 protocol_entry (SGEN_PROTOCOL_WORLD_RESTARTING, &entry, sizeof (SGenProtocolWorldRestarting));
340 binary_protocol_world_restarted (int generation, long long timestamp)
342 SGenProtocolWorldRestarted entry = { generation, timestamp };
343 protocol_entry (SGEN_PROTOCOL_WORLD_RESTARTED, &entry, sizeof (SGenProtocolWorldRestarted));
347 binary_protocol_thread_suspend (gpointer thread, gpointer stopped_ip)
349 SGenProtocolThreadSuspend entry = { thread, stopped_ip };
350 protocol_entry (SGEN_PROTOCOL_THREAD_SUSPEND, &entry, sizeof (SGenProtocolThreadSuspend));
354 binary_protocol_thread_restart (gpointer thread)
356 SGenProtocolThreadRestart entry = { thread };
357 protocol_entry (SGEN_PROTOCOL_THREAD_RESTART, &entry, sizeof (SGenProtocolThreadRestart));
361 binary_protocol_thread_register (gpointer thread)
363 SGenProtocolThreadRegister entry = { thread };
364 protocol_entry (SGEN_PROTOCOL_THREAD_REGISTER, &entry, sizeof (SGenProtocolThreadRegister));
369 binary_protocol_thread_unregister (gpointer thread)
371 SGenProtocolThreadUnregister entry = { thread };
372 protocol_entry (SGEN_PROTOCOL_THREAD_UNREGISTER, &entry, sizeof (SGenProtocolThreadUnregister));
377 binary_protocol_missing_remset (gpointer obj, gpointer obj_vtable, int offset, gpointer value, gpointer value_vtable, int value_pinned)
379 SGenProtocolMissingRemset entry = { obj, obj_vtable, offset, value, value_vtable, value_pinned };
380 protocol_entry (SGEN_PROTOCOL_MISSING_REMSET, &entry, sizeof (SGenProtocolMissingRemset));
385 binary_protocol_cement (gpointer obj, gpointer vtable, int size)
387 SGenProtocolCement entry = { obj, vtable, size };
388 protocol_entry (SGEN_PROTOCOL_CEMENT, &entry, sizeof (SGenProtocolCement));
392 binary_protocol_cement_reset (void)
394 protocol_entry (SGEN_PROTOCOL_CEMENT_RESET, NULL, 0);
398 binary_protocol_domain_unload_begin (gpointer domain)
400 SGenProtocolDomainUnload entry = { domain };
401 protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_BEGIN, &entry, sizeof (SGenProtocolDomainUnload));
405 binary_protocol_domain_unload_end (gpointer domain)
407 SGenProtocolDomainUnload entry = { domain };
408 protocol_entry (SGEN_PROTOCOL_DOMAIN_UNLOAD_END, &entry, sizeof (SGenProtocolDomainUnload));
411 #ifdef SGEN_HEAVY_BINARY_PROTOCOL
413 binary_protocol_alloc (gpointer obj, gpointer vtable, int size)
415 SGenProtocolAlloc entry = { obj, vtable, size };
416 protocol_entry (SGEN_PROTOCOL_ALLOC, &entry, sizeof (SGenProtocolAlloc));
420 binary_protocol_alloc_pinned (gpointer obj, gpointer vtable, int size)
422 SGenProtocolAlloc entry = { obj, vtable, size };
423 protocol_entry (SGEN_PROTOCOL_ALLOC_PINNED, &entry, sizeof (SGenProtocolAlloc));
427 binary_protocol_alloc_degraded (gpointer obj, gpointer vtable, int size)
429 SGenProtocolAlloc entry = { obj, vtable, size };
430 protocol_entry (SGEN_PROTOCOL_ALLOC_DEGRADED, &entry, sizeof (SGenProtocolAlloc));
434 binary_protocol_copy (gpointer from, gpointer to, gpointer vtable, int size)
436 SGenProtocolCopy entry = { from, to, vtable, size };
437 protocol_entry (SGEN_PROTOCOL_COPY, &entry, sizeof (SGenProtocolCopy));
441 binary_protocol_pin (gpointer obj, gpointer vtable, int size)
443 SGenProtocolPin entry = { obj, vtable, size };
444 protocol_entry (SGEN_PROTOCOL_PIN, &entry, sizeof (SGenProtocolPin));
448 binary_protocol_mark (gpointer obj, gpointer vtable, int size)
450 SGenProtocolMark entry = { obj, vtable, size };
451 protocol_entry (SGEN_PROTOCOL_MARK, &entry, sizeof (SGenProtocolMark));
455 binary_protocol_scan_begin (gpointer obj, gpointer vtable, int size)
457 SGenProtocolScanBegin entry = { obj, vtable, size };
458 protocol_entry (SGEN_PROTOCOL_SCAN_BEGIN, &entry, sizeof (SGenProtocolScanBegin));
462 binary_protocol_scan_vtype_begin (gpointer obj, int size)
464 SGenProtocolScanVTypeBegin entry = { obj, size };
465 protocol_entry (SGEN_PROTOCOL_SCAN_VTYPE_BEGIN, &entry, sizeof (SGenProtocolScanVTypeBegin));
469 binary_protocol_wbarrier (gpointer ptr, gpointer value, gpointer value_vtable)
471 SGenProtocolWBarrier entry = { ptr, value, value_vtable };
472 protocol_entry (SGEN_PROTOCOL_WBARRIER, &entry, sizeof (SGenProtocolWBarrier));
476 binary_protocol_global_remset (gpointer ptr, gpointer value, gpointer value_vtable)
478 SGenProtocolGlobalRemset entry = { ptr, value, value_vtable };
479 protocol_entry (SGEN_PROTOCOL_GLOBAL_REMSET, &entry, sizeof (SGenProtocolGlobalRemset));
483 binary_protocol_ptr_update (gpointer ptr, gpointer old_value, gpointer new_value, gpointer vtable, int size)
485 SGenProtocolPtrUpdate entry = { ptr, old_value, new_value, vtable, size };
486 protocol_entry (SGEN_PROTOCOL_PTR_UPDATE, &entry, sizeof (SGenProtocolPtrUpdate));
490 binary_protocol_cleanup (gpointer ptr, gpointer vtable, int size)
492 SGenProtocolCleanup entry = { ptr, vtable, size };
493 protocol_entry (SGEN_PROTOCOL_CLEANUP, &entry, sizeof (SGenProtocolCleanup));
497 binary_protocol_empty (gpointer start, int size)
499 SGenProtocolEmpty entry = { start, size };
500 protocol_entry (SGEN_PROTOCOL_EMPTY, &entry, sizeof (SGenProtocolEmpty));
504 binary_protocol_card_scan (gpointer start, int size)
506 SGenProtocolCardScan entry = { start, size };
507 protocol_entry (SGEN_PROTOCOL_CARD_SCAN, &entry, sizeof (SGenProtocolCardScan));
511 binary_protocol_dislink_update (gpointer link, gpointer obj, int track, int staged)
513 SGenProtocolDislinkUpdate entry = { link, obj, track, staged };
514 protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE, &entry, sizeof (SGenProtocolDislinkUpdate));
518 binary_protocol_dislink_update_staged (gpointer link, gpointer obj, int track, int index)
520 SGenProtocolDislinkUpdateStaged entry = { link, obj, track, index };
521 protocol_entry (SGEN_PROTOCOL_DISLINK_UPDATE_STAGED, &entry, sizeof (SGenProtocolDislinkUpdateStaged));
525 binary_protocol_dislink_process_staged (gpointer link, gpointer obj, int index)
527 SGenProtocolDislinkProcessStaged entry = { link, obj, index };
528 protocol_entry (SGEN_PROTOCOL_DISLINK_PROCESS_STAGED, &entry, sizeof (SGenProtocolDislinkProcessStaged));
532 binary_protocol_gray_enqueue (gpointer queue, gpointer cursor, gpointer value)
534 SGenProtocolGrayQueue entry = { queue, cursor, value };
535 protocol_entry (SGEN_PROTOCOL_GRAY_ENQUEUE, &entry, sizeof (SGenProtocolGrayQueue));
539 binary_protocol_gray_dequeue (gpointer queue, gpointer cursor, gpointer value)
541 SGenProtocolGrayQueue entry = { queue, cursor, value };
542 protocol_entry (SGEN_PROTOCOL_GRAY_DEQUEUE, &entry, sizeof (SGenProtocolGrayQueue));
546 #endif /* HAVE_SGEN_GC */