2 * mono-profiler-log.c: mono log profiler
5 * Paolo Molaro (lupus@ximian.com)
6 * Alex Rønne Petersen (alexrp@xamarin.com)
8 * Copyright 2010 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
10 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/debug-helpers.h>
16 #include "../metadata/metadata-internals.h"
17 #include <mono/metadata/mono-config.h>
18 #include <mono/metadata/mono-gc.h>
19 #include <mono/metadata/mono-perfcounters.h>
20 #include <mono/utils/atomic.h>
21 #include <mono/utils/hazard-pointer.h>
22 #include <mono/utils/lock-free-alloc.h>
23 #include <mono/utils/lock-free-queue.h>
24 #include <mono/utils/mono-conc-hashtable.h>
25 #include <mono/utils/mono-counters.h>
26 #include <mono/utils/mono-logger-internals.h>
27 #include <mono/utils/mono-linked-list-set.h>
28 #include <mono/utils/mono-membar.h>
29 #include <mono/utils/mono-mmap.h>
30 #include <mono/utils/mono-os-mutex.h>
31 #include <mono/utils/mono-os-semaphore.h>
32 #include <mono/utils/mono-threads.h>
33 #include <mono/utils/mono-threads-api.h>
46 #if defined(__APPLE__)
47 #include <mach/mach_time.h>
49 #include <netinet/in.h>
50 #ifdef HAVE_SYS_MMAN_H
53 #include <sys/socket.h>
54 #if defined (HAVE_SYS_ZLIB)
58 #define BUFFER_SIZE (4096 * 16)
60 /* Worst-case size in bytes of a 64-bit value encoded with LEB128. */
61 #define LEB128_SIZE 10
63 /* Size of a value encoded as a single byte. */
64 #undef BYTE_SIZE // mach/i386/vm_param.h on OS X defines this to 8, but it isn't used for anything.
67 /* Size in bytes of the event prefix (ID + time). */
68 #define EVENT_SIZE (BYTE_SIZE + LEB128_SIZE)
70 static volatile gint32 runtime_inited;
71 static volatile gint32 in_shutdown;
73 static ProfilerConfig config;
74 static int nocalls = 0;
75 static int notraces = 0;
76 static int use_zip = 0;
77 static int do_report = 0;
78 static int do_heap_shot = 0;
79 static int max_call_depth = 0;
80 static int command_port = 0;
81 static int heapshot_requested = 0;
82 static int do_mono_sample = 0;
83 static int do_coverage = 0;
84 static gboolean no_counters = FALSE;
85 static int max_allocated_sample_hits;
87 #define ENABLED(EVT) (config.effective_mask & (EVT))
89 // Statistics for internal profiler data structures.
90 static gint32 sample_allocations_ctr,
91 buffer_allocations_ctr;
93 // Statistics for profiler events.
94 static gint32 sync_points_ctr,
103 gc_handle_creations_ctr,
104 gc_handle_deletions_ctr,
107 finalize_object_begins_ctr,
108 finalize_object_ends_ctr,
112 assembly_unloads_ctr,
117 method_exception_exits_ctr,
120 exception_throws_ctr,
121 exception_clauses_ctr,
134 counter_descriptors_ctr,
136 perfcounter_descriptors_ctr,
137 perfcounter_samples_ctr,
138 coverage_methods_ctr,
139 coverage_statements_ctr,
140 coverage_classes_ctr,
141 coverage_assemblies_ctr;
143 static MonoLinkedListSet profiler_thread_list;
149 * The file is composed by a header followed by 0 or more buffers.
150 * Each buffer contains events that happened on a thread: for a given thread
151 * buffers that appear later in the file are guaranteed to contain events
152 * that happened later in time. Buffers from separate threads could be interleaved,
154 * Buffers are not required to be aligned.
157 * [id: 4 bytes] constant value: LOG_HEADER_ID
158 * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
159 * [format: 1 byte] version of the data format for the rest of the file
160 * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
161 * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
162 * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
163 * [flags: 4 bytes] file format flags, should be 0 for now
164 * [pid: 4 bytes] pid of the profiled process
165 * [port: 2 bytes] tcp port for server if != 0
166 * [args size: 4 bytes] size of args
167 * [args: string] arguments passed to the profiler
168 * [arch size: 4 bytes] size of arch
169 * [arch: string] architecture the profiler is running on
170 * [os size: 4 bytes] size of os
171 * [os: string] operating system the profiler is running on
173 * The multiple byte integers are in little-endian format.
176 * [buffer header] [event]*
177 * Buffers have a fixed-size header followed by 0 or more bytes of event data.
178 * Timing information and other values in the event data are usually stored
179 * as uleb128 or sleb128 integers. To save space, as noted for each item below,
180 * some data is represented as a difference between the actual value and
181 * either the last value of the same type (like for timing information) or
182 * as the difference from a value stored in a buffer header.
184 * For timing information the data is stored as uleb128, since timing
185 * increases in a monotonic way in each thread: the value is the number of
186 * nanoseconds to add to the last seen timing data in a buffer. The first value
187 * in a buffer will be calculated from the time_base field in the buffer head.
189 * Object or heap sizes are stored as uleb128.
190 * Pointer differences are stored as sleb128, instead.
192 * If an unexpected value is found, the rest of the buffer should be ignored,
193 * as generally the later values need the former to be interpreted correctly.
195 * buffer header format:
196 * [bufid: 4 bytes] constant value: BUF_ID
197 * [len: 4 bytes] size of the data following the buffer header
198 * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
199 * [ptr_base: 8 bytes] base value for pointers
200 * [obj_base: 8 bytes] base value for object addresses
201 * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
202 * [method_base: 8 bytes] base value for MonoMethod pointers
205 * [extended info: upper 4 bits] [type: lower 4 bits]
206 * [time diff: uleb128] nanoseconds since last timing
208 * The data that follows depends on type and the extended info.
209 * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
210 * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
211 * The extended info bits are interpreted based on type, see
212 * each individual event description below.
213 * strings are represented as a 0-terminated utf8 sequence.
216 * [num: uleb128] number of frames following
217 * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
218 * pointer or the buffer method_base
222 * exinfo: zero or TYPE_ALLOC_BT
223 * [ptr: sleb128] class as a byte difference from ptr_base
224 * [obj: sleb128] object address as a byte difference from obj_base
225 * [size: uleb128] size of the object in the heap
226 * If exinfo == TYPE_ALLOC_BT, a backtrace follows.
230 * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
231 * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
232 * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
233 * if exinfo == TYPE_GC_RESIZE
234 * [heap_size: uleb128] new heap size
235 * if exinfo == TYPE_GC_EVENT
236 * [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
237 * [generation: byte] GC generation event refers to
238 * if exinfo == TYPE_GC_MOVE
239 * [num_objects: uleb128] number of object moves that follow
240 * [objaddr: sleb128]+ num_objects object pointer differences from obj_base
241 * num is always an even number: the even items are the old
242 * addresses, the odd numbers are the respective new object addresses
243 * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
244 * [handle_type: uleb128] MonoGCHandleType enum value
245 * upper bits reserved as flags
246 * [handle: uleb128] GC handle value
247 * [objaddr: sleb128] object pointer differences from obj_base
248 * If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
249 * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
250 * [handle_type: uleb128] MonoGCHandleType enum value
251 * upper bits reserved as flags
252 * [handle: uleb128] GC handle value
253 * If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
254 * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
255 * [object: sleb128] the object as a difference from obj_base
257 * type metadata format:
258 * type: TYPE_METADATA
259 * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN,
260 * doesn't occur for TYPE_CLASS)
261 * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
262 * TYPE_THREAD, TYPE_CONTEXT
263 * [pointer: sleb128] pointer of the metadata type depending on mtype
264 * if mtype == TYPE_CLASS
265 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
266 * [name: string] full class name
267 * if mtype == TYPE_IMAGE
268 * [name: string] image file name
269 * if mtype == TYPE_ASSEMBLY
270 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
271 * [name: string] assembly name
272 * if mtype == TYPE_DOMAIN && exinfo == 0
273 * [name: string] domain friendly name
274 * if mtype == TYPE_CONTEXT
275 * [domain: sleb128] domain id as pointer
276 * if mtype == TYPE_THREAD && exinfo == 0
277 * [name: string] thread name
279 * type method format:
281 * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
282 * [method: sleb128] MonoMethod* as a pointer difference from the last such
283 * pointer or the buffer method_base
284 * if exinfo == TYPE_JIT
285 * [code address: sleb128] pointer to the native code as a diff from ptr_base
286 * [code size: uleb128] size of the generated code
287 * [name: string] full method name
289 * type exception format:
290 * type: TYPE_EXCEPTION
291 * exinfo: zero, TYPE_CLAUSE, or TYPE_THROW_BT
292 * if exinfo == TYPE_CLAUSE
293 * [clause type: byte] MonoExceptionEnum enum value
294 * [clause index: uleb128] index of the current clause
295 * [method: sleb128] MonoMethod* as a pointer difference from the last such
296 * pointer or the buffer method_base
297 * [object: sleb128] the exception object as a difference from obj_base
299 * [object: sleb128] the exception object as a difference from obj_base
300 * If exinfo == TYPE_THROW_BT, a backtrace follows.
302 * type runtime format:
304 * exinfo: one of: TYPE_JITHELPER
305 * if exinfo == TYPE_JITHELPER
306 * [type: byte] MonoProfilerCodeBufferType enum value
307 * [buffer address: sleb128] pointer to the native code as a diff from ptr_base
308 * [buffer size: uleb128] size of the generated code
309 * if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
310 * [name: string] buffer description name
312 * type monitor format:
314 * exinfo: zero or TYPE_MONITOR_BT
315 * [type: byte] MonoProfilerMonitorEvent enum value
316 * [object: sleb128] the lock object as a difference from obj_base
317 * If exinfo == TYPE_MONITOR_BT, a backtrace follows.
321 * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
322 * if exinfo == TYPE_HEAP_OBJECT
323 * [object: sleb128] the object as a difference from obj_base
324 * [class: sleb128] the object MonoClass* as a difference from ptr_base
325 * [size: uleb128] size of the object on the heap
326 * [num_refs: uleb128] number of object references
327 * each referenced objref is preceded by a uleb128 encoded offset: the
328 * first offset is from the object address and each next offset is relative
329 * to the previous one
330 * [objrefs: sleb128]+ object referenced as a difference from obj_base
331 * The same object can appear multiple times, but only the first time
332 * with size != 0: in the other cases this data will only be used to
333 * provide additional referenced objects.
334 * if exinfo == TYPE_HEAP_ROOT
335 * [num_roots: uleb128] number of root references
336 * [num_gc: uleb128] number of major gcs
337 * [object: sleb128] the object as a difference from obj_base
338 * [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
339 * [extra_info: uleb128] the extra_info value
340 * object, root_type and extra_info are repeated num_roots times
344 * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
345 * if exinfo == TYPE_SAMPLE_HIT
346 * [thread: sleb128] thread id as difference from ptr_base
347 * [count: uleb128] number of following instruction addresses
348 * [ip: sleb128]* instruction pointer as difference from ptr_base
349 * [mbt_count: uleb128] number of managed backtrace frames
350 * [method: sleb128]* MonoMethod* as a pointer difference from the last such
351 * pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
352 * if exinfo == TYPE_SAMPLE_USYM
353 * [address: sleb128] symbol address as a difference from ptr_base
354 * [size: uleb128] symbol size (may be 0 if unknown)
355 * [name: string] symbol name
356 * if exinfo == TYPE_SAMPLE_UBIN
357 * [address: sleb128] address where binary has been loaded as a difference from ptr_base
358 * [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
359 * [size: uleb128] memory size
360 * [name: string] binary name
361 * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
362 * [len: uleb128] number of counters
364 * [section: uleb128] section of counter
365 * if section == MONO_COUNTER_PERFCOUNTERS:
366 * [section_name: string] section name of counter
367 * [name: string] name of counter
368 * [type: byte] type of counter
369 * [unit: byte] unit of counter
370 * [variance: byte] variance of counter
371 * [index: uleb128] unique index of counter
372 * if exinfo == TYPE_SAMPLE_COUNTERS
374 * [index: uleb128] unique index of counter
377 * [type: byte] type of counter value
380 * [0: byte] 0 -> value is null
382 * [1: byte] 1 -> value is not null
383 * [value: string] counter value
385 * [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
387 * type coverage format
388 * type: TYPE_COVERAGE
389 * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
390 * if exinfo == TYPE_COVERAGE_METHOD
391 * [assembly: string] name of assembly
392 * [class: string] name of the class
393 * [name: string] name of the method
394 * [signature: string] the signature of the method
395 * [filename: string] the file path of the file that contains this method
396 * [token: uleb128] the method token
397 * [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
398 * [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
399 * if exinfo == TYPE_COVERAGE_STATEMENTS
400 * [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
401 * [offset: uleb128] the il offset relative to the previous offset
402 * [counter: uleb128] the counter for this instruction
403 * [line: uleb128] the line of filename containing this instruction
404 * [column: uleb128] the column containing this instruction
405 * if exinfo == TYPE_COVERAGE_ASSEMBLY
406 * [name: string] assembly name
407 * [guid: string] assembly GUID
408 * [filename: string] assembly filename
409 * [number_of_methods: uleb128] the number of methods in this assembly
410 * [fully_covered: uleb128] the number of fully covered methods
411 * [partially_covered: uleb128] the number of partially covered methods
412 * currently partially_covered will always be 0, and fully_covered is the
413 * number of methods that are fully and partially covered.
414 * if exinfo == TYPE_COVERAGE_CLASS
415 * [name: string] assembly name
416 * [class: string] class name
417 * [number_of_methods: uleb128] the number of methods in this class
418 * [fully_covered: uleb128] the number of fully covered methods
419 * [partially_covered: uleb128] the number of partially covered methods
420 * currently partially_covered will always be 0, and fully_covered is the
421 * number of methods that are fully and partially covered.
425 * exinfo: one of: TYPE_SYNC_POINT
426 * if exinfo == TYPE_SYNC_POINT
427 * [type: byte] MonoProfilerSyncPointType enum value
430 // Pending data to be written to the log, for a single thread.
431 // Threads periodically flush their own LogBuffers by calling safe_send
432 typedef struct _LogBuffer LogBuffer;
434 // Next (older) LogBuffer in processing queue
440 uintptr_t method_base;
441 uintptr_t last_method;
445 // Bytes allocated for this LogBuffer
448 // Start of currently unused space in buffer
449 unsigned char* cursor;
451 // Pointer to start-of-structure-plus-size (for convenience)
452 unsigned char* buf_end;
454 // Start of data in buffer. Contents follow "buffer format" described above.
455 unsigned char buf [1];
459 MonoLinkedListSetNode node;
461 // Was this thread added to the LLS?
464 // The current log buffer for this thread.
467 // Methods referenced by events in `buffer`, see `MethodInfo`.
470 // Current call depth for enter/leave events.
473 // Indicates whether this thread is currently writing to its `buffer`.
476 // Has this thread written a thread end event to `buffer`?
479 // Stored in `buffer_lock_state` to take the exclusive lock.
481 } MonoProfilerThread;
483 // Do not use these TLS macros directly unless you know what you're doing.
487 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
488 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
489 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
490 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
492 static DWORD profiler_tls;
496 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
497 #define PROF_TLS_GET() (profiler_tls)
498 #define PROF_TLS_INIT()
499 #define PROF_TLS_FREE()
501 static __thread MonoProfilerThread *profiler_tls;
505 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
506 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
507 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
508 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
510 static pthread_key_t profiler_tls;
517 return (uintptr_t) mono_native_thread_id_get ();
524 return (uintptr_t) GetCurrentProcessId ();
526 return (uintptr_t) getpid ();
531 static mach_timebase_info_data_t timebase_info;
532 #elif defined (HOST_WIN32)
533 static LARGE_INTEGER pcounter_freq;
536 #define TICKS_PER_SEC 1000000000LL
542 uint64_t time = mach_absolute_time ();
544 time *= timebase_info.numer;
545 time /= timebase_info.denom;
548 #elif defined (HOST_WIN32)
551 QueryPerformanceCounter (&value);
553 return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
554 #elif defined (CLOCK_MONOTONIC)
555 struct timespec tspec;
557 clock_gettime (CLOCK_MONOTONIC, &tspec);
559 return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
563 gettimeofday (&tv, NULL);
565 return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
569 static int timer_overhead;
575 mach_timebase_info (&timebase_info);
576 #elif defined (HOST_WIN32)
577 QueryPerformanceFrequency (&pcounter_freq);
580 uint64_t time_start = current_time ();
582 for (int i = 0; i < 256; ++i)
585 uint64_t time_end = current_time ();
587 timer_overhead = (time_end - time_start) / 256;
591 * These macros should be used when writing an event to a log buffer. They
592 * take care of a bunch of stuff that can be repetitive and error-prone, such
593 * as attaching the current thread, acquiring/releasing the buffer lock,
594 * incrementing the event counter, expanding the log buffer, etc. They also
595 * create a scope so that it's harder to leak the LogBuffer pointer, which can
596 * be problematic as the pointer is unstable when the buffer lock isn't
599 * If the calling thread is already attached, these macros will not alter its
600 * attach mode (i.e. whether it's added to the LLS). If the thread is not
601 * attached, init_thread () will be called with add_to_lls = TRUE.
604 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
606 MonoProfilerThread *thread__ = get_thread (); \
607 if (thread__->attached) \
609 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
610 thread__->busy = TRUE; \
611 InterlockedIncrement ((COUNTER)); \
612 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
614 #define EXIT_LOG_EXPLICIT(SEND) \
615 thread__->busy = FALSE; \
617 send_log_unsafe (TRUE); \
618 if (thread__->attached) \
622 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
624 #define NO_SEND FALSE
626 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
628 typedef struct _BinaryObject BinaryObject;
629 struct _BinaryObject {
635 struct _MonoProfiler {
636 MonoProfilerHandle handle;
638 #if defined (HAVE_SYS_ZLIB)
642 uint64_t startup_time;
647 MonoNativeThreadId helper_thread;
648 MonoNativeThreadId writer_thread;
649 MonoNativeThreadId dumper_thread;
650 volatile gint32 run_writer_thread;
651 MonoLockFreeAllocSizeClass writer_entry_size_class;
652 MonoLockFreeAllocator writer_entry_allocator;
653 MonoLockFreeQueue writer_queue;
654 MonoSemType writer_queue_sem;
655 MonoConcurrentHashTable *method_table;
656 mono_mutex_t method_table_mutex;
657 volatile gint32 run_dumper_thread;
658 MonoLockFreeQueue dumper_queue;
659 MonoSemType dumper_queue_sem;
660 MonoLockFreeAllocSizeClass sample_size_class;
661 MonoLockFreeAllocator sample_allocator;
662 MonoLockFreeQueue sample_reuse_queue;
663 BinaryObject *binary_objects;
664 GPtrArray *coverage_filters;
667 static struct _MonoProfiler log_profiler;
670 MonoLockFreeQueueNode node;
675 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
684 pstrdup (const char *s)
686 int len = strlen (s) + 1;
687 char *p = (char *) g_malloc (len);
693 alloc_buffer (int size)
695 return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
699 free_buffer (void *buf, int size)
701 mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
705 create_buffer (uintptr_t tid, int bytes)
707 LogBuffer* buf = (LogBuffer *) alloc_buffer (MAX (BUFFER_SIZE, bytes));
709 InterlockedIncrement (&buffer_allocations_ctr);
711 buf->size = BUFFER_SIZE;
712 buf->time_base = current_time ();
713 buf->last_time = buf->time_base;
714 buf->buf_end = (unsigned char *) buf + buf->size;
715 buf->cursor = buf->buf;
716 buf->thread_id = tid;
722 * Must be called with the reader lock held if thread is the current thread, or
723 * the exclusive lock if thread is a different thread. However, if thread is
724 * the current thread, and init_thread () was called with add_to_lls = FALSE,
725 * then no locking is necessary.
728 init_buffer_state (MonoProfilerThread *thread)
730 thread->buffer = create_buffer (thread->node.key, 0);
731 thread->methods = NULL;
735 clear_hazard_pointers (MonoThreadHazardPointers *hp)
737 mono_hazard_pointer_clear (hp, 0);
738 mono_hazard_pointer_clear (hp, 1);
739 mono_hazard_pointer_clear (hp, 2);
742 static MonoProfilerThread *
743 init_thread (gboolean add_to_lls)
745 MonoProfilerThread *thread = PROF_TLS_GET ();
748 * Sometimes we may try to initialize a thread twice. One example is the
749 * main thread: We initialize it when setting up the profiler, but we will
750 * also get a thread_start () callback for it. Another example is when
751 * attaching new threads to the runtime: We may get a gc_alloc () callback
752 * for that thread's thread object (where we initialize it), soon followed
753 * by a thread_start () callback.
755 * These cases are harmless anyhow. Just return if we've already done the
756 * initialization work.
761 thread = g_malloc (sizeof (MonoProfilerThread));
762 thread->node.key = thread_id ();
763 thread->attached = add_to_lls;
764 thread->call_depth = 0;
766 thread->ended = FALSE;
768 init_buffer_state (thread);
770 thread->small_id = mono_thread_info_register_small_id ();
773 * Some internal profiler threads don't need to be cleaned up
774 * by the main thread on shutdown.
777 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
778 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
779 clear_hazard_pointers (hp);
782 PROF_TLS_SET (thread);
787 // Only valid if init_thread () was called with add_to_lls = FALSE.
789 deinit_thread (MonoProfilerThread *thread)
791 g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
797 static MonoProfilerThread *
800 return init_thread (TRUE);
803 // Only valid if init_thread () was called with add_to_lls = FALSE.
805 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
807 LogBuffer *old = thread->buffer;
809 if (old->cursor + bytes < old->buf_end)
812 LogBuffer *new_ = create_buffer (thread->node.key, bytes);
814 thread->buffer = new_;
820 * This is a reader/writer spin lock of sorts used to protect log buffers.
821 * When a thread modifies its own log buffer, it increments the reader
822 * count. When a thread wants to access log buffers of other threads, it
823 * takes the exclusive lock.
825 * `buffer_lock_state` holds the reader count in its lower 16 bits, and
826 * the small ID of the thread currently holding the exclusive (writer)
827 * lock in its upper 16 bits. Both can be zero. It's important that the
828 * whole lock state is a single word that can be read/written atomically
829 * to avoid race conditions where there could end up being readers while
830 * the writer lock is held.
832 * The lock is writer-biased. When a thread wants to take the exclusive
833 * lock, it increments `buffer_lock_exclusive_intent` which will make new
834 * readers spin until it's back to zero, then takes the exclusive lock
835 * once the reader count has reached zero. After releasing the exclusive
836 * lock, it decrements `buffer_lock_exclusive_intent`, which, when it
837 * reaches zero again, allows readers to increment the reader count.
839 * The writer bias is necessary because we take the exclusive lock in
840 * `gc_event ()` during STW. If the writer bias was not there, and a
841 * program had a large number of threads, STW-induced pauses could be
842 * significantly longer than they have to be. Also, we emit periodic
843 * sync points from the helper thread, which requires taking the
844 * exclusive lock, and we need those to arrive with a reasonably
845 * consistent frequency so that readers don't have to queue up too many
846 * events between sync points.
848 * The lock does not support recursion.
850 static volatile gint32 buffer_lock_state;
851 static volatile gint32 buffer_lock_exclusive_intent;
857 * If the thread holding the exclusive lock tries to modify the
858 * reader count, just make it a no-op. This way, we also avoid
859 * invoking the GC safe point macros below, which could break if
860 * done from a thread that is currently the initiator of STW.
862 * In other words, we rely on the fact that the GC thread takes
863 * the exclusive lock in the gc_event () callback when the world
866 if (InterlockedRead (&buffer_lock_state) != get_thread ()->small_id << 16) {
873 // Hold off if a thread wants to take the exclusive lock.
874 while (InterlockedRead (&buffer_lock_exclusive_intent))
875 mono_thread_info_yield ();
877 old = InterlockedRead (&buffer_lock_state);
879 // Is a thread holding the exclusive lock?
881 mono_thread_info_yield ();
886 } while (InterlockedCompareExchange (&buffer_lock_state, new_, old) != old);
891 mono_memory_barrier ();
897 mono_memory_barrier ();
899 gint32 state = InterlockedRead (&buffer_lock_state);
901 // See the comment in buffer_lock ().
902 if (state == PROF_TLS_GET ()->small_id << 16)
905 g_assert (state && "Why are we decrementing a zero reader count?");
906 g_assert (!(state >> 16) && "Why is the exclusive lock held?");
908 InterlockedDecrement (&buffer_lock_state);
912 buffer_lock_excl (void)
914 gint32 new_ = get_thread ()->small_id << 16;
916 g_assert (InterlockedRead (&buffer_lock_state) != new_ && "Why are we taking the exclusive lock twice?");
918 InterlockedIncrement (&buffer_lock_exclusive_intent);
922 while (InterlockedCompareExchange (&buffer_lock_state, new_, 0))
923 mono_thread_info_yield ();
927 mono_memory_barrier ();
931 buffer_unlock_excl (void)
933 mono_memory_barrier ();
935 gint32 state = InterlockedRead (&buffer_lock_state);
936 gint32 excl = state >> 16;
938 g_assert (excl && "Why is the exclusive lock not held?");
939 g_assert (excl == PROF_TLS_GET ()->small_id && "Why does another thread hold the exclusive lock?");
940 g_assert (!(state & 0xFFFF) && "Why are there readers when the exclusive lock is held?");
942 InterlockedWrite (&buffer_lock_state, 0);
943 InterlockedDecrement (&buffer_lock_exclusive_intent);
947 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
952 uint8_t b = value & 0x7f;
955 if (value != 0) /* more bytes to come */
965 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
968 int negative = (value < 0);
969 unsigned int size = sizeof (intptr_t) * 8;
977 /* the following is unnecessary if the
978 * implementation of >>= uses an arithmetic rather
979 * than logical shift for a signed left operand
983 value |= - ((intptr_t) 1 <<(size - 7));
985 /* sign bit of byte is second high order bit (0x40) */
986 if ((value == 0 && !(byte & 0x40)) ||
987 (value == -1 && (byte & 0x40)))
999 emit_byte (LogBuffer *logbuffer, int value)
1001 logbuffer->cursor [0] = value;
1002 logbuffer->cursor++;
1004 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1008 emit_value (LogBuffer *logbuffer, int value)
1010 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1012 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1016 emit_time (LogBuffer *logbuffer, uint64_t value)
1018 uint64_t tdiff = value - logbuffer->last_time;
1019 encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
1020 logbuffer->last_time = value;
1022 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1026 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
1028 emit_byte (logbuffer, event);
1029 emit_time (logbuffer, time);
1033 emit_event (LogBuffer *logbuffer, int event)
1035 emit_event_time (logbuffer, event, current_time ());
1039 emit_svalue (LogBuffer *logbuffer, int64_t value)
1041 encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1043 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1047 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
1049 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1051 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1055 emit_ptr (LogBuffer *logbuffer, const void *ptr)
1057 if (!logbuffer->ptr_base)
1058 logbuffer->ptr_base = (uintptr_t) ptr;
1060 emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
1062 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1066 emit_method_inner (LogBuffer *logbuffer, void *method)
1068 if (!logbuffer->method_base) {
1069 logbuffer->method_base = (intptr_t) method;
1070 logbuffer->last_method = (intptr_t) method;
1073 encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1074 logbuffer->last_method = (intptr_t) method;
1076 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1079 // The reader lock must be held.
1081 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1083 MonoProfilerThread *thread = get_thread ();
1085 if (!mono_conc_hashtable_lookup (log_profiler.method_table, method)) {
1086 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1088 info->method = method;
1090 info->time = current_time ();
1092 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1093 g_ptr_array_add (arr, info);
1098 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1100 register_method_local (method, NULL);
1101 emit_method_inner (logbuffer, method);
1105 emit_obj (LogBuffer *logbuffer, void *ptr)
1107 if (!logbuffer->obj_base)
1108 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1110 emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1112 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1116 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1120 for (; i < size; i++) {
1123 emit_byte (logbuffer, str [i]);
1126 emit_byte (logbuffer, '\0');
1130 emit_double (LogBuffer *logbuffer, double value)
1133 unsigned char buffer[8];
1134 memcpy (buffer, &value, 8);
1135 #if G_BYTE_ORDER == G_BIG_ENDIAN
1136 for (i = 7; i >= 0; i--)
1138 for (i = 0; i < 8; i++)
1140 emit_byte (logbuffer, buffer[i]);
1144 write_int16 (char *buf, int32_t value)
1147 for (i = 0; i < 2; ++i) {
1155 write_int32 (char *buf, int32_t value)
1158 for (i = 0; i < 4; ++i) {
1166 write_int64 (char *buf, int64_t value)
1169 for (i = 0; i < 8; ++i) {
1177 write_header_string (char *p, const char *str)
1179 size_t len = strlen (str) + 1;
1181 p = write_int32 (p, len);
1190 const char *args = log_profiler.args;
1191 const char *arch = mono_config_get_cpu ();
1192 const char *os = mono_config_get_os ();
1194 char *hbuf = g_malloc (
1195 sizeof (gint32) /* header id */ +
1196 sizeof (gint8) /* major version */ +
1197 sizeof (gint8) /* minor version */ +
1198 sizeof (gint8) /* data version */ +
1199 sizeof (gint8) /* word size */ +
1200 sizeof (gint64) /* startup time */ +
1201 sizeof (gint32) /* timer overhead */ +
1202 sizeof (gint32) /* flags */ +
1203 sizeof (gint32) /* process id */ +
1204 sizeof (gint16) /* command port */ +
1205 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1206 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1207 sizeof (gint32) + strlen (os) + 1 /* operating system */
1211 p = write_int32 (p, LOG_HEADER_ID);
1212 *p++ = LOG_VERSION_MAJOR;
1213 *p++ = LOG_VERSION_MINOR;
1214 *p++ = LOG_DATA_VERSION;
1215 *p++ = sizeof (void *);
1216 p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1217 p = write_int32 (p, timer_overhead);
1218 p = write_int32 (p, 0); /* flags */
1219 p = write_int32 (p, process_id ());
1220 p = write_int16 (p, log_profiler.command_port);
1221 p = write_header_string (p, args);
1222 p = write_header_string (p, arch);
1223 p = write_header_string (p, os);
1225 #if defined (HAVE_SYS_ZLIB)
1226 if (log_profiler.gzfile) {
1227 gzwrite (log_profiler.gzfile, hbuf, p - hbuf);
1231 fwrite (hbuf, p - hbuf, 1, log_profiler.file);
1232 fflush (log_profiler.file);
1239 * Must be called with the reader lock held if thread is the current thread, or
1240 * the exclusive lock if thread is a different thread. However, if thread is
1241 * the current thread, and init_thread () was called with add_to_lls = FALSE,
1242 * then no locking is necessary.
1245 send_buffer (MonoProfilerThread *thread)
1247 WriterQueueEntry *entry = mono_lock_free_alloc (&log_profiler.writer_entry_allocator);
1248 entry->methods = thread->methods;
1249 entry->buffer = thread->buffer;
1251 mono_lock_free_queue_node_init (&entry->node, FALSE);
1253 mono_lock_free_queue_enqueue (&log_profiler.writer_queue, &entry->node);
1254 mono_os_sem_post (&log_profiler.writer_queue_sem);
1258 free_thread (gpointer p)
1260 MonoProfilerThread *thread = p;
1262 if (!thread->ended) {
1264 * The thread is being cleaned up by the main thread during
1265 * shutdown. This typically happens for internal runtime
1266 * threads. We need to synthesize a thread end event.
1269 InterlockedIncrement (&thread_ends_ctr);
1271 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1272 LogBuffer *buf = ensure_logbuf_unsafe (thread,
1273 EVENT_SIZE /* event */ +
1274 BYTE_SIZE /* type */ +
1275 LEB128_SIZE /* tid */
1278 emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1279 emit_byte (buf, TYPE_THREAD);
1280 emit_ptr (buf, (void *) thread->node.key);
1284 send_buffer (thread);
1290 remove_thread (MonoProfilerThread *thread)
1292 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1294 if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1295 mono_thread_hazardous_try_free (thread, free_thread);
1297 clear_hazard_pointers (hp);
1301 dump_buffer (LogBuffer *buf)
1307 dump_buffer (buf->next);
1309 if (buf->cursor - buf->buf) {
1310 p = write_int32 (p, BUF_ID);
1311 p = write_int32 (p, buf->cursor - buf->buf);
1312 p = write_int64 (p, buf->time_base);
1313 p = write_int64 (p, buf->ptr_base);
1314 p = write_int64 (p, buf->obj_base);
1315 p = write_int64 (p, buf->thread_id);
1316 p = write_int64 (p, buf->method_base);
1318 #if defined (HAVE_SYS_ZLIB)
1319 if (log_profiler.gzfile) {
1320 gzwrite (log_profiler.gzfile, hbuf, p - hbuf);
1321 gzwrite (log_profiler.gzfile, buf->buf, buf->cursor - buf->buf);
1325 fwrite (hbuf, p - hbuf, 1, log_profiler.file);
1326 fwrite (buf->buf, buf->cursor - buf->buf, 1, log_profiler.file);
1327 fflush (log_profiler.file);
1331 free_buffer (buf, buf->size);
1335 dump_buffer_threadless (LogBuffer *buf)
1337 for (LogBuffer *iter = buf; iter; iter = iter->next)
1338 iter->thread_id = 0;
1343 // Only valid if init_thread () was called with add_to_lls = FALSE.
1345 send_log_unsafe (gboolean if_needed)
1347 MonoProfilerThread *thread = PROF_TLS_GET ();
1349 if (!if_needed || (if_needed && thread->buffer->next)) {
1350 if (!thread->attached)
1351 for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1352 iter->thread_id = 0;
1354 send_buffer (thread);
1355 init_buffer_state (thread);
1359 // Assumes that the exclusive lock is held.
1361 sync_point_flush (void)
1363 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1365 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1366 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1368 send_buffer (thread);
1369 init_buffer_state (thread);
1370 } MONO_LLS_FOREACH_SAFE_END
1373 // Assumes that the exclusive lock is held.
1375 sync_point_mark (MonoProfilerSyncPointType type)
1377 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1379 ENTER_LOG (&sync_points_ctr, logbuffer,
1380 EVENT_SIZE /* event */ +
1381 LEB128_SIZE /* type */
1384 emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1385 emit_byte (logbuffer, type);
1387 EXIT_LOG_EXPLICIT (NO_SEND);
1389 send_log_unsafe (FALSE);
1392 // Assumes that the exclusive lock is held.
1394 sync_point (MonoProfilerSyncPointType type)
1396 sync_point_flush ();
1397 sync_point_mark (type);
1401 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1403 /* account for object alignment in the heap */
1407 ENTER_LOG (&heap_objects_ctr, logbuffer,
1408 EVENT_SIZE /* event */ +
1409 LEB128_SIZE /* obj */ +
1410 LEB128_SIZE /* klass */ +
1411 LEB128_SIZE /* size */ +
1412 LEB128_SIZE /* num */ +
1414 LEB128_SIZE /* offset */ +
1415 LEB128_SIZE /* ref */
1419 emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1420 emit_obj (logbuffer, obj);
1421 emit_ptr (logbuffer, klass);
1422 emit_value (logbuffer, size);
1423 emit_value (logbuffer, num);
1425 uintptr_t last_offset = 0;
1427 for (int i = 0; i < num; ++i) {
1428 emit_value (logbuffer, offsets [i] - last_offset);
1429 last_offset = offsets [i];
1430 emit_obj (logbuffer, refs [i]);
1433 EXIT_LOG_EXPLICIT (DO_SEND);
1438 static unsigned int hs_mode_ms = 0;
1439 static unsigned int hs_mode_gc = 0;
1440 static unsigned int hs_mode_ondemand = 0;
1441 static unsigned int gc_count = 0;
1442 static uint64_t last_hs_time = 0;
1443 static gboolean do_heap_walk = FALSE;
1444 static gboolean ignore_heap_events;
1447 gc_roots (MonoProfiler *prof, MonoObject *const *objects, const MonoProfilerGCRootType *root_types, const uintptr_t *extra_info, uint64_t num)
1449 if (ignore_heap_events)
1452 ENTER_LOG (&heap_roots_ctr, logbuffer,
1453 EVENT_SIZE /* event */ +
1454 LEB128_SIZE /* num */ +
1455 LEB128_SIZE /* collections */ +
1457 LEB128_SIZE /* object */ +
1458 LEB128_SIZE /* root type */ +
1459 LEB128_SIZE /* extra info */
1463 emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1464 emit_value (logbuffer, num);
1465 emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1467 for (int i = 0; i < num; ++i) {
1468 emit_obj (logbuffer, objects [i]);
1469 emit_byte (logbuffer, root_types [i]);
1470 emit_value (logbuffer, extra_info [i]);
1473 EXIT_LOG_EXPLICIT (DO_SEND);
1478 trigger_on_demand_heapshot (void)
1480 if (heapshot_requested)
1481 mono_gc_collect (mono_gc_max_generation ());
1484 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1487 gc_event (MonoProfiler *profiler, MonoProfilerGCEvent ev, uint32_t generation)
1489 if (ev == MONO_GC_EVENT_START) {
1490 uint64_t now = current_time ();
1492 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1493 do_heap_walk = TRUE;
1494 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1495 do_heap_walk = TRUE;
1496 else if (hs_mode_ondemand)
1497 do_heap_walk = heapshot_requested;
1498 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1499 do_heap_walk = TRUE;
1501 //If using heapshot, ignore events for collections we don't care
1502 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1503 // Ignore events generated during the collection itself (IE GC ROOTS)
1504 ignore_heap_events = !do_heap_walk;
1509 if (ENABLED (PROFLOG_GC_EVENTS)) {
1510 ENTER_LOG (&gc_events_ctr, logbuffer,
1511 EVENT_SIZE /* event */ +
1512 BYTE_SIZE /* gc event */ +
1513 BYTE_SIZE /* generation */
1516 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1517 emit_byte (logbuffer, ev);
1518 emit_byte (logbuffer, generation);
1520 EXIT_LOG_EXPLICIT (NO_SEND);
1524 case MONO_GC_EVENT_START:
1525 if (generation == mono_gc_max_generation ())
1529 case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1531 * Ensure that no thread can be in the middle of writing to
1532 * a buffer when the world stops...
1534 buffer_lock_excl ();
1536 case MONO_GC_EVENT_POST_STOP_WORLD:
1538 * ... So that we now have a consistent view of all buffers.
1539 * This allows us to flush them. We need to do this because
1540 * they may contain object allocation events that need to be
1541 * committed to the log file before any object move events
1542 * that will be produced during this GC.
1544 if (ENABLED (ALL_GC_EVENTS_MASK))
1545 sync_point (SYNC_POINT_WORLD_STOP);
1548 * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1549 * Right now, that's the case for GC Moves, GC Roots or heapshots.
1551 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1552 ENTER_LOG (&heap_starts_ctr, logbuffer,
1553 EVENT_SIZE /* event */
1556 emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1558 EXIT_LOG_EXPLICIT (DO_SEND);
1562 case MONO_GC_EVENT_PRE_START_WORLD:
1563 if (do_heap_shot && do_heap_walk)
1564 mono_gc_walk_heap (0, gc_reference, NULL);
1566 /* Matching HEAP_END to the HEAP_START from above */
1567 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1568 ENTER_LOG (&heap_ends_ctr, logbuffer,
1569 EVENT_SIZE /* event */
1572 emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1574 EXIT_LOG_EXPLICIT (DO_SEND);
1577 if (do_heap_shot && do_heap_walk) {
1578 do_heap_walk = FALSE;
1579 heapshot_requested = 0;
1580 last_hs_time = current_time ();
1584 * Similarly, we must now make sure that any object moves
1585 * written to the GC thread's buffer are flushed. Otherwise,
1586 * object allocation events for certain addresses could come
1587 * after the move events that made those addresses available.
1589 if (ENABLED (ALL_GC_EVENTS_MASK))
1590 sync_point_mark (SYNC_POINT_WORLD_START);
1592 case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1594 * Finally, it is safe to allow other threads to write to
1595 * their buffers again.
1597 buffer_unlock_excl ();
1605 gc_resize (MonoProfiler *profiler, uintptr_t new_size)
1607 ENTER_LOG (&gc_resizes_ctr, logbuffer,
1608 EVENT_SIZE /* event */ +
1609 LEB128_SIZE /* new size */
1612 emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1613 emit_value (logbuffer, new_size);
1615 EXIT_LOG_EXPLICIT (DO_SEND);
1620 MonoMethod* methods [MAX_FRAMES];
1621 int32_t il_offsets [MAX_FRAMES];
1622 int32_t native_offsets [MAX_FRAMES];
1625 static int num_frames = MAX_FRAMES;
1628 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1630 FrameData *frame = (FrameData *)data;
1631 if (method && frame->count < num_frames) {
1632 frame->il_offsets [frame->count] = il_offset;
1633 frame->native_offsets [frame->count] = native_offset;
1634 frame->methods [frame->count++] = method;
1636 return frame->count == num_frames;
1640 * a note about stack walks: they can cause more profiler events to fire,
1641 * so we need to make sure they don't happen after we started emitting an
1642 * event, hence the collect_bt/emit_bt split.
1645 collect_bt (FrameData *data)
1648 mono_stack_walk_no_il (walk_stack, data);
1652 emit_bt (LogBuffer *logbuffer, FrameData *data)
1654 emit_value (logbuffer, data->count);
1657 emit_method (logbuffer, data->methods [--data->count]);
1661 gc_alloc (MonoProfiler *prof, MonoObject *obj)
1663 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1665 uintptr_t len = mono_object_get_size (obj);
1666 /* account for object alignment in the heap */
1673 ENTER_LOG (&gc_allocs_ctr, logbuffer,
1674 EVENT_SIZE /* event */ +
1675 LEB128_SIZE /* klass */ +
1676 LEB128_SIZE /* obj */ +
1677 LEB128_SIZE /* size */ +
1679 LEB128_SIZE /* count */ +
1681 LEB128_SIZE /* method */
1686 emit_event (logbuffer, do_bt | TYPE_ALLOC);
1687 emit_ptr (logbuffer, mono_object_get_class (obj));
1688 emit_obj (logbuffer, obj);
1689 emit_value (logbuffer, len);
1692 emit_bt (logbuffer, &data);
1698 gc_moves (MonoProfiler *prof, MonoObject *const *objects, uint64_t num)
1700 ENTER_LOG (&gc_moves_ctr, logbuffer,
1701 EVENT_SIZE /* event */ +
1702 LEB128_SIZE /* num */ +
1704 LEB128_SIZE /* object */
1708 emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1709 emit_value (logbuffer, num);
1711 for (int i = 0; i < num; ++i)
1712 emit_obj (logbuffer, objects [i]);
1714 EXIT_LOG_EXPLICIT (DO_SEND);
1718 gc_handle (MonoProfiler *prof, int op, MonoGCHandleType type, uint32_t handle, MonoObject *obj)
1720 int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1726 gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1728 ENTER_LOG (ctr, logbuffer,
1729 EVENT_SIZE /* event */ +
1730 LEB128_SIZE /* type */ +
1731 LEB128_SIZE /* handle */ +
1732 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1733 LEB128_SIZE /* obj */
1736 LEB128_SIZE /* count */ +
1738 LEB128_SIZE /* method */
1743 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1744 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1745 else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1746 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1748 g_assert_not_reached ();
1750 emit_value (logbuffer, type);
1751 emit_value (logbuffer, handle);
1753 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1754 emit_obj (logbuffer, obj);
1757 emit_bt (logbuffer, &data);
1763 gc_handle_created (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type, MonoObject *obj)
1765 gc_handle (prof, MONO_PROFILER_GC_HANDLE_CREATED, type, handle, obj);
1769 gc_handle_deleted (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type)
1771 gc_handle (prof, MONO_PROFILER_GC_HANDLE_DESTROYED, type, handle, NULL);
1775 finalize_begin (MonoProfiler *prof)
1777 ENTER_LOG (&finalize_begins_ctr, buf,
1778 EVENT_SIZE /* event */
1781 emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1787 finalize_end (MonoProfiler *prof)
1789 trigger_on_demand_heapshot ();
1790 if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1791 ENTER_LOG (&finalize_ends_ctr, buf,
1792 EVENT_SIZE /* event */
1795 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1802 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1804 ENTER_LOG (&finalize_object_begins_ctr, buf,
1805 EVENT_SIZE /* event */ +
1806 LEB128_SIZE /* obj */
1809 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1810 emit_obj (buf, obj);
1816 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1818 ENTER_LOG (&finalize_object_ends_ctr, buf,
1819 EVENT_SIZE /* event */ +
1820 LEB128_SIZE /* obj */
1823 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1824 emit_obj (buf, obj);
1830 push_nesting (char *p, MonoClass *klass)
1835 nesting = mono_class_get_nesting_type (klass);
1837 p = push_nesting (p, nesting);
1841 name = mono_class_get_name (klass);
1842 nspace = mono_class_get_namespace (klass);
1845 p += strlen (nspace);
1855 type_name (MonoClass *klass)
1859 push_nesting (buf, klass);
1860 p = (char *) g_malloc (strlen (buf) + 1);
1866 image_loaded (MonoProfiler *prof, MonoImage *image)
1868 const char *name = mono_image_get_filename (image);
1869 int nlen = strlen (name) + 1;
1871 ENTER_LOG (&image_loads_ctr, logbuffer,
1872 EVENT_SIZE /* event */ +
1873 BYTE_SIZE /* type */ +
1874 LEB128_SIZE /* image */ +
1878 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1879 emit_byte (logbuffer, TYPE_IMAGE);
1880 emit_ptr (logbuffer, image);
1881 memcpy (logbuffer->cursor, name, nlen);
1882 logbuffer->cursor += nlen;
1888 image_unloaded (MonoProfiler *prof, MonoImage *image)
1890 const char *name = mono_image_get_filename (image);
1891 int nlen = strlen (name) + 1;
1893 ENTER_LOG (&image_unloads_ctr, logbuffer,
1894 EVENT_SIZE /* event */ +
1895 BYTE_SIZE /* type */ +
1896 LEB128_SIZE /* image */ +
1900 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1901 emit_byte (logbuffer, TYPE_IMAGE);
1902 emit_ptr (logbuffer, image);
1903 memcpy (logbuffer->cursor, name, nlen);
1904 logbuffer->cursor += nlen;
1910 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly)
1912 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1913 int nlen = strlen (name) + 1;
1914 MonoImage *image = mono_assembly_get_image (assembly);
1916 ENTER_LOG (&assembly_loads_ctr, logbuffer,
1917 EVENT_SIZE /* event */ +
1918 BYTE_SIZE /* type */ +
1919 LEB128_SIZE /* assembly */ +
1920 LEB128_SIZE /* image */ +
1924 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1925 emit_byte (logbuffer, TYPE_ASSEMBLY);
1926 emit_ptr (logbuffer, assembly);
1927 emit_ptr (logbuffer, image);
1928 memcpy (logbuffer->cursor, name, nlen);
1929 logbuffer->cursor += nlen;
1937 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1939 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1940 int nlen = strlen (name) + 1;
1941 MonoImage *image = mono_assembly_get_image (assembly);
1943 ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1944 EVENT_SIZE /* event */ +
1945 BYTE_SIZE /* type */ +
1946 LEB128_SIZE /* assembly */ +
1947 LEB128_SIZE /* image */ +
1951 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1952 emit_byte (logbuffer, TYPE_ASSEMBLY);
1953 emit_ptr (logbuffer, assembly);
1954 emit_ptr (logbuffer, image);
1955 memcpy (logbuffer->cursor, name, nlen);
1956 logbuffer->cursor += nlen;
1964 class_loaded (MonoProfiler *prof, MonoClass *klass)
1968 if (InterlockedRead (&runtime_inited))
1969 name = mono_type_get_name (mono_class_get_type (klass));
1971 name = type_name (klass);
1973 int nlen = strlen (name) + 1;
1974 MonoImage *image = mono_class_get_image (klass);
1976 ENTER_LOG (&class_loads_ctr, logbuffer,
1977 EVENT_SIZE /* event */ +
1978 BYTE_SIZE /* type */ +
1979 LEB128_SIZE /* klass */ +
1980 LEB128_SIZE /* image */ +
1984 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1985 emit_byte (logbuffer, TYPE_CLASS);
1986 emit_ptr (logbuffer, klass);
1987 emit_ptr (logbuffer, image);
1988 memcpy (logbuffer->cursor, name, nlen);
1989 logbuffer->cursor += nlen;
2000 method_enter (MonoProfiler *prof, MonoMethod *method)
2002 if (get_thread ()->call_depth++ <= max_call_depth) {
2003 ENTER_LOG (&method_entries_ctr, logbuffer,
2004 EVENT_SIZE /* event */ +
2005 LEB128_SIZE /* method */
2008 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
2009 emit_method (logbuffer, method);
2016 method_leave (MonoProfiler *prof, MonoMethod *method)
2018 if (--get_thread ()->call_depth <= max_call_depth) {
2019 ENTER_LOG (&method_exits_ctr, logbuffer,
2020 EVENT_SIZE /* event */ +
2021 LEB128_SIZE /* method */
2024 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2025 emit_method (logbuffer, method);
2032 method_exc_leave (MonoProfiler *prof, MonoMethod *method, MonoObject *exc)
2034 if (!nocalls && --get_thread ()->call_depth <= max_call_depth) {
2035 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2036 EVENT_SIZE /* event */ +
2037 LEB128_SIZE /* method */
2040 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2041 emit_method (logbuffer, method);
2047 static MonoProfilerCallInstrumentationFlags
2048 method_filter (MonoProfiler *prof, MonoMethod *method)
2050 return MONO_PROFILER_CALL_INSTRUMENTATION_PROLOGUE | MONO_PROFILER_CALL_INSTRUMENTATION_EPILOGUE;
2054 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji)
2058 register_method_local (method, ji);
2064 code_buffer_new (MonoProfiler *prof, const mono_byte *buffer, uint64_t size, MonoProfilerCodeBufferType type, const void *data)
2069 if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2070 name = (const char *) data;
2071 nlen = strlen (name) + 1;
2077 ENTER_LOG (&code_buffers_ctr, logbuffer,
2078 EVENT_SIZE /* event */ +
2079 BYTE_SIZE /* type */ +
2080 LEB128_SIZE /* buffer */ +
2081 LEB128_SIZE /* size */ +
2087 emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2088 emit_byte (logbuffer, type);
2089 emit_ptr (logbuffer, buffer);
2090 emit_value (logbuffer, size);
2093 memcpy (logbuffer->cursor, name, nlen);
2094 logbuffer->cursor += nlen;
2101 throw_exc (MonoProfiler *prof, MonoObject *object)
2103 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2109 ENTER_LOG (&exception_throws_ctr, logbuffer,
2110 EVENT_SIZE /* event */ +
2111 LEB128_SIZE /* object */ +
2113 LEB128_SIZE /* count */ +
2115 LEB128_SIZE /* method */
2120 emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2121 emit_obj (logbuffer, object);
2124 emit_bt (logbuffer, &data);
2130 clause_exc (MonoProfiler *prof, MonoMethod *method, uint32_t clause_num, MonoExceptionEnum clause_type, MonoObject *exc)
2132 ENTER_LOG (&exception_clauses_ctr, logbuffer,
2133 EVENT_SIZE /* event */ +
2134 BYTE_SIZE /* clause type */ +
2135 LEB128_SIZE /* clause num */ +
2136 LEB128_SIZE /* method */
2139 emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2140 emit_byte (logbuffer, clause_type);
2141 emit_value (logbuffer, clause_num);
2142 emit_method (logbuffer, method);
2143 emit_obj (logbuffer, exc);
2149 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2151 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2157 ENTER_LOG (&monitor_events_ctr, logbuffer,
2158 EVENT_SIZE /* event */ +
2159 BYTE_SIZE /* ev */ +
2160 LEB128_SIZE /* object */ +
2162 LEB128_SIZE /* count */ +
2164 LEB128_SIZE /* method */
2169 emit_event (logbuffer, do_bt | TYPE_MONITOR);
2170 emit_byte (logbuffer, ev);
2171 emit_obj (logbuffer, object);
2174 emit_bt (logbuffer, &data);
2180 monitor_contention (MonoProfiler *prof, MonoObject *object)
2182 monitor_event (prof, object, MONO_PROFILER_MONITOR_CONTENTION);
2186 monitor_acquired (MonoProfiler *prof, MonoObject *object)
2188 monitor_event (prof, object, MONO_PROFILER_MONITOR_DONE);
2192 monitor_failed (MonoProfiler *prof, MonoObject *object)
2194 monitor_event (prof, object, MONO_PROFILER_MONITOR_FAIL);
2198 thread_start (MonoProfiler *prof, uintptr_t tid)
2200 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2201 ENTER_LOG (&thread_starts_ctr, logbuffer,
2202 EVENT_SIZE /* event */ +
2203 BYTE_SIZE /* type */ +
2204 LEB128_SIZE /* tid */
2207 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2208 emit_byte (logbuffer, TYPE_THREAD);
2209 emit_ptr (logbuffer, (void*) tid);
2216 thread_end (MonoProfiler *prof, uintptr_t tid)
2218 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2219 ENTER_LOG (&thread_ends_ctr, logbuffer,
2220 EVENT_SIZE /* event */ +
2221 BYTE_SIZE /* type */ +
2222 LEB128_SIZE /* tid */
2225 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2226 emit_byte (logbuffer, TYPE_THREAD);
2227 emit_ptr (logbuffer, (void*) tid);
2229 EXIT_LOG_EXPLICIT (NO_SEND);
2232 MonoProfilerThread *thread = get_thread ();
2234 thread->ended = TRUE;
2235 remove_thread (thread);
2237 PROF_TLS_SET (NULL);
2241 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2243 int len = strlen (name) + 1;
2245 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2246 ENTER_LOG (&thread_names_ctr, logbuffer,
2247 EVENT_SIZE /* event */ +
2248 BYTE_SIZE /* type */ +
2249 LEB128_SIZE /* tid */ +
2253 emit_event (logbuffer, TYPE_METADATA);
2254 emit_byte (logbuffer, TYPE_THREAD);
2255 emit_ptr (logbuffer, (void*)tid);
2256 memcpy (logbuffer->cursor, name, len);
2257 logbuffer->cursor += len;
2264 domain_loaded (MonoProfiler *prof, MonoDomain *domain)
2266 ENTER_LOG (&domain_loads_ctr, logbuffer,
2267 EVENT_SIZE /* event */ +
2268 BYTE_SIZE /* type */ +
2269 LEB128_SIZE /* domain id */
2272 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2273 emit_byte (logbuffer, TYPE_DOMAIN);
2274 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2280 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2282 ENTER_LOG (&domain_unloads_ctr, logbuffer,
2283 EVENT_SIZE /* event */ +
2284 BYTE_SIZE /* type */ +
2285 LEB128_SIZE /* domain id */
2288 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2289 emit_byte (logbuffer, TYPE_DOMAIN);
2290 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2296 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2298 int nlen = strlen (name) + 1;
2300 ENTER_LOG (&domain_names_ctr, logbuffer,
2301 EVENT_SIZE /* event */ +
2302 BYTE_SIZE /* type */ +
2303 LEB128_SIZE /* domain id */ +
2307 emit_event (logbuffer, TYPE_METADATA);
2308 emit_byte (logbuffer, TYPE_DOMAIN);
2309 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2310 memcpy (logbuffer->cursor, name, nlen);
2311 logbuffer->cursor += nlen;
2317 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2319 ENTER_LOG (&context_loads_ctr, logbuffer,
2320 EVENT_SIZE /* event */ +
2321 BYTE_SIZE /* type */ +
2322 LEB128_SIZE /* context id */ +
2323 LEB128_SIZE /* domain id */
2326 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2327 emit_byte (logbuffer, TYPE_CONTEXT);
2328 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2329 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2335 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2337 ENTER_LOG (&context_unloads_ctr, logbuffer,
2338 EVENT_SIZE /* event */ +
2339 BYTE_SIZE /* type */ +
2340 LEB128_SIZE /* context id */ +
2341 LEB128_SIZE /* domain id */
2344 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2345 emit_byte (logbuffer, TYPE_CONTEXT);
2346 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2347 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2360 MonoLockFreeQueueNode node;
2365 AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2369 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2371 SampleHit *sample = (SampleHit *) data;
2373 if (sample->count < num_frames) {
2374 int i = sample->count;
2376 sample->frames [i].method = method;
2377 sample->frames [i].domain = domain;
2378 sample->frames [i].base_address = base_address;
2379 sample->frames [i].offset = offset;
2384 return sample->count == num_frames;
2387 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2388 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2391 enqueue_sample_hit (gpointer p)
2393 SampleHit *sample = p;
2395 mono_lock_free_queue_node_unpoison (&sample->node);
2396 mono_lock_free_queue_enqueue (&log_profiler.dumper_queue, &sample->node);
2397 mono_os_sem_post (&log_profiler.dumper_queue_sem);
2401 mono_sample_hit (MonoProfiler *profiler, const mono_byte *ip, const void *context)
2404 * Please note: We rely on the runtime loading the profiler with
2405 * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2406 * this function (and its siblings) are resolved when the profiler is
2407 * loaded. Otherwise, we would potentially invoke the dynamic linker when
2408 * invoking runtime functions, which is not async-signal-safe.
2411 if (InterlockedRead (&in_shutdown))
2414 SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2418 * If we're out of reusable sample events and we're not allowed to
2419 * allocate more, we have no choice but to drop the event.
2421 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2424 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2425 mono_lock_free_queue_node_init (&sample->node, TRUE);
2427 InterlockedIncrement (&sample_allocations_ctr);
2431 mono_stack_walk_async_safe (&async_walk_stack, (void *) context, sample);
2433 sample->time = current_time ();
2434 sample->tid = thread_id ();
2437 mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2440 static uintptr_t *code_pages = 0;
2441 static int num_code_pages = 0;
2442 static int size_code_pages = 0;
2443 #define CPAGE_SHIFT (9)
2444 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2445 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2446 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2449 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2452 uintptr_t start_pos;
2453 start_pos = (page >> CPAGE_SHIFT) % hsize;
2456 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2458 } else if (!hash [i]) {
2465 } while (i != start_pos);
2466 g_assert_not_reached ();
2471 add_code_pointer (uintptr_t ip)
2474 if (num_code_pages * 2 >= size_code_pages) {
2476 uintptr_t old_size = size_code_pages;
2477 size_code_pages *= 2;
2478 if (size_code_pages == 0)
2479 size_code_pages = 16;
2480 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2481 for (i = 0; i < old_size; ++i) {
2483 add_code_page (n, size_code_pages, code_pages [i]);
2486 g_free (code_pages);
2489 num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2492 /* ELF code crashes on some systems. */
2493 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2496 dump_ubin (const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2498 int len = strlen (filename) + 1;
2500 ENTER_LOG (&sample_ubins_ctr, logbuffer,
2501 EVENT_SIZE /* event */ +
2502 LEB128_SIZE /* load address */ +
2503 LEB128_SIZE /* offset */ +
2504 LEB128_SIZE /* size */ +
2505 nlen /* file name */
2508 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2509 emit_ptr (logbuffer, load_addr);
2510 emit_uvalue (logbuffer, offset);
2511 emit_uvalue (logbuffer, size);
2512 memcpy (logbuffer->cursor, filename, len);
2513 logbuffer->cursor += len;
2515 EXIT_LOG_EXPLICIT (DO_SEND);
2520 dump_usym (const char *name, uintptr_t value, uintptr_t size)
2522 int len = strlen (name) + 1;
2524 ENTER_LOG (&sample_usyms_ctr, logbuffer,
2525 EVENT_SIZE /* event */ +
2526 LEB128_SIZE /* value */ +
2527 LEB128_SIZE /* size */ +
2531 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2532 emit_ptr (logbuffer, (void*)value);
2533 emit_value (logbuffer, size);
2534 memcpy (logbuffer->cursor, name, len);
2535 logbuffer->cursor += len;
2537 EXIT_LOG_EXPLICIT (DO_SEND);
2540 /* ELF code crashes on some systems. */
2541 //#if defined(ELFMAG0)
2544 #if SIZEOF_VOID_P == 4
2545 #define ELF_WSIZE 32
2547 #define ELF_WSIZE 64
2550 #define ElfW(type) _ElfW (Elf, ELF_WSIZE, type)
2551 #define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
2552 #define _ElfW_1(e,w,t) e##w##t
2556 dump_elf_symbols (ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2559 for (i = 0; i < num_symbols; ++i) {
2561 sym = strtab + symbols [i].st_name;
2562 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2564 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2569 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2576 ElfW(Shdr) *sheader;
2577 ElfW(Shdr) *shstrtabh;
2578 ElfW(Shdr) *symtabh = NULL;
2579 ElfW(Shdr) *strtabh = NULL;
2580 ElfW(Sym) *symbols = NULL;
2584 fd = open (filename, O_RDONLY);
2587 if (fstat (fd, &statb) != 0) {
2591 file_size = statb.st_size;
2592 data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2594 if (data == MAP_FAILED)
2597 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2598 header->e_ident [EI_MAG1] != ELFMAG1 ||
2599 header->e_ident [EI_MAG2] != ELFMAG2 ||
2600 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2601 munmap (data, file_size);
2604 sheader = (void*)((char*)data + header->e_shoff);
2605 shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2606 strtab = (const char*)data + shstrtabh->sh_offset;
2607 for (i = 0; i < header->e_shnum; ++i) {
2608 if (sheader->sh_type == SHT_SYMTAB) {
2610 strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2613 sheader = (void*)((char*)sheader + header->e_shentsize);
2615 if (!symtabh || !strtabh) {
2616 munmap (data, file_size);
2619 strtab = (const char*)data + strtabh->sh_offset;
2620 num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2621 symbols = (void*)((char*)data + symtabh->sh_offset);
2622 dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2623 munmap (data, file_size);
2628 /* ELF code crashes on some systems. */
2629 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2632 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2635 const char *filename;
2637 char *a = (void*)info->dlpi_addr;
2639 ElfW(Dyn) *dyn = NULL;
2640 ElfW(Sym) *symtab = NULL;
2641 ElfW(Word) *hash_table = NULL;
2642 ElfW(Ehdr) *header = NULL;
2643 const char* strtab = NULL;
2644 for (obj = log_profiler.binary_objects; obj; obj = obj->next) {
2648 filename = info->dlpi_name;
2651 if (!info->dlpi_addr && !filename [0]) {
2652 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2658 obj = g_calloc (sizeof (BinaryObject), 1);
2659 obj->addr = (void*)info->dlpi_addr;
2660 obj->name = pstrdup (filename);
2661 obj->next = log_profiler.binary_objects;
2662 log_profiler.binary_objects = obj;
2664 for (i = 0; i < info->dlpi_phnum; ++i) {
2665 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2666 header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2667 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2668 header->e_ident [EI_MAG1] != ELFMAG1 ||
2669 header->e_ident [EI_MAG2] != ELFMAG2 ||
2670 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2673 dump_ubin (filename, info->dlpi_addr + info->dlpi_phdr[i].p_vaddr, info->dlpi_phdr[i].p_offset, info->dlpi_phdr[i].p_memsz);
2674 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2675 dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2678 if (read_elf_symbols (filename, (void*)info->dlpi_addr))
2680 if (!info->dlpi_name || !info->dlpi_name[0])
2684 for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2685 if (dyn [i].d_tag == DT_SYMTAB) {
2686 symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2687 } else if (dyn [i].d_tag == DT_HASH) {
2688 hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2689 } else if (dyn [i].d_tag == DT_STRTAB) {
2690 strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2695 num_sym = hash_table [1];
2696 dump_elf_symbols (symtab, num_sym, strtab, (void*)info->dlpi_addr);
2701 load_binaries (void)
2703 dl_iterate_phdr (elf_dl_callback, NULL);
2708 load_binaries (void)
2715 symbol_for (uintptr_t code)
2718 void *ip = (void*)code;
2720 if (dladdr (ip, &di)) {
2722 return di.dli_sname;
2725 names = backtrace_symbols (&ip, 1);
2727 const char* p = names [0];
2738 dump_unmanaged_coderefs (void)
2741 const char* last_symbol;
2742 uintptr_t addr, page_end;
2744 if (load_binaries ())
2746 for (i = 0; i < size_code_pages; ++i) {
2748 if (!code_pages [i] || code_pages [i] & 1)
2751 addr = CPAGE_ADDR (code_pages [i]);
2752 page_end = addr + CPAGE_SIZE;
2753 code_pages [i] |= 1;
2754 /* we dump the symbols for the whole page */
2755 for (; addr < page_end; addr += 16) {
2756 sym = symbol_for (addr);
2757 if (sym && sym == last_symbol)
2762 dump_usym (sym, addr, 0); /* let's not guess the size */
2767 typedef struct MonoCounterAgent {
2768 MonoCounter *counter;
2769 // MonoCounterAgent specific data :
2774 struct MonoCounterAgent *next;
2777 static MonoCounterAgent* counters;
2778 static int counters_index = 1;
2779 static mono_mutex_t counters_mutex;
2782 counters_add_agent (MonoCounter *counter)
2784 if (InterlockedRead (&in_shutdown))
2787 MonoCounterAgent *agent, *item;
2789 mono_os_mutex_lock (&counters_mutex);
2791 for (agent = counters; agent; agent = agent->next) {
2792 if (agent->counter == counter) {
2793 agent->value_size = 0;
2795 g_free (agent->value);
2796 agent->value = NULL;
2802 agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2803 agent->counter = counter;
2804 agent->value = NULL;
2805 agent->value_size = 0;
2806 agent->index = counters_index++;
2820 mono_os_mutex_unlock (&counters_mutex);
2824 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2826 counters_add_agent (counter);
2831 counters_init (void)
2833 mono_os_mutex_init (&counters_mutex);
2835 mono_counters_on_register (&counters_add_agent);
2836 mono_counters_foreach (counters_init_foreach_callback, NULL);
2840 counters_emit (void)
2842 MonoCounterAgent *agent;
2845 EVENT_SIZE /* event */ +
2846 LEB128_SIZE /* len */
2849 mono_os_mutex_lock (&counters_mutex);
2851 for (agent = counters; agent; agent = agent->next) {
2856 LEB128_SIZE /* section */ +
2857 strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2858 BYTE_SIZE /* type */ +
2859 BYTE_SIZE /* unit */ +
2860 BYTE_SIZE /* variance */ +
2861 LEB128_SIZE /* index */
2870 ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2872 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2873 emit_value (logbuffer, len);
2875 for (agent = counters; agent; agent = agent->next) {
2881 name = mono_counter_get_name (agent->counter);
2882 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2883 emit_string (logbuffer, name, strlen (name) + 1);
2884 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2885 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2886 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2887 emit_value (logbuffer, agent->index);
2892 EXIT_LOG_EXPLICIT (DO_SEND);
2895 mono_os_mutex_unlock (&counters_mutex);
2899 counters_sample (uint64_t timestamp)
2901 MonoCounterAgent *agent;
2902 MonoCounter *counter;
2911 buffer = g_calloc (1, buffer_size);
2913 mono_os_mutex_lock (&counters_mutex);
2916 EVENT_SIZE /* event */
2919 for (agent = counters; agent; agent = agent->next) {
2921 LEB128_SIZE /* index */ +
2922 BYTE_SIZE /* type */ +
2923 mono_counter_get_size (agent->counter) /* value */
2928 LEB128_SIZE /* stop marker */
2931 ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2933 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2935 for (agent = counters; agent; agent = agent->next) {
2938 counter = agent->counter;
2940 size = mono_counter_get_size (counter);
2942 if (size > buffer_size) {
2944 buffer = g_realloc (buffer, buffer_size);
2947 memset (buffer, 0, buffer_size);
2949 g_assert (mono_counters_sample (counter, buffer, size));
2951 type = mono_counter_get_type (counter);
2953 if (!agent->value) {
2954 agent->value = g_calloc (1, size);
2955 agent->value_size = size;
2957 if (type == MONO_COUNTER_STRING) {
2958 if (strcmp (agent->value, buffer) == 0)
2961 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2966 emit_uvalue (logbuffer, agent->index);
2967 emit_byte (logbuffer, type);
2969 case MONO_COUNTER_INT:
2970 #if SIZEOF_VOID_P == 4
2971 case MONO_COUNTER_WORD:
2973 emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2975 case MONO_COUNTER_UINT:
2976 emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2978 case MONO_COUNTER_TIME_INTERVAL:
2979 case MONO_COUNTER_LONG:
2980 #if SIZEOF_VOID_P == 8
2981 case MONO_COUNTER_WORD:
2983 emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2985 case MONO_COUNTER_ULONG:
2986 emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2988 case MONO_COUNTER_DOUBLE:
2989 emit_double (logbuffer, *(double*)buffer);
2991 case MONO_COUNTER_STRING:
2993 emit_byte (logbuffer, 0);
2995 emit_byte (logbuffer, 1);
2996 emit_string (logbuffer, (char*)buffer, size);
3000 g_assert_not_reached ();
3003 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
3004 agent->value = g_realloc (agent->value, size);
3005 agent->value_size = size;
3009 memcpy (agent->value, buffer, size);
3013 emit_value (logbuffer, 0);
3015 EXIT_LOG_EXPLICIT (DO_SEND);
3017 mono_os_mutex_unlock (&counters_mutex);
3020 typedef struct _PerfCounterAgent PerfCounterAgent;
3021 struct _PerfCounterAgent {
3022 PerfCounterAgent *next;
3024 char *category_name;
3033 static PerfCounterAgent *perfcounters = NULL;
3036 perfcounters_emit (void)
3038 PerfCounterAgent *pcagent;
3041 EVENT_SIZE /* event */ +
3042 LEB128_SIZE /* len */
3045 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3046 if (pcagent->emitted)
3050 LEB128_SIZE /* section */ +
3051 strlen (pcagent->category_name) + 1 /* category name */ +
3052 strlen (pcagent->name) + 1 /* name */ +
3053 BYTE_SIZE /* type */ +
3054 BYTE_SIZE /* unit */ +
3055 BYTE_SIZE /* variance */ +
3056 LEB128_SIZE /* index */
3065 ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3067 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3068 emit_value (logbuffer, len);
3070 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3071 if (pcagent->emitted)
3074 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3075 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3076 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3077 emit_byte (logbuffer, MONO_COUNTER_LONG);
3078 emit_byte (logbuffer, MONO_COUNTER_RAW);
3079 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3080 emit_value (logbuffer, pcagent->index);
3082 pcagent->emitted = 1;
3085 EXIT_LOG_EXPLICIT (DO_SEND);
3089 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3091 PerfCounterAgent *pcagent;
3093 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3094 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3096 if (pcagent->value == value)
3099 pcagent->value = value;
3100 pcagent->updated = 1;
3101 pcagent->deleted = 0;
3105 pcagent = g_new0 (PerfCounterAgent, 1);
3106 pcagent->next = perfcounters;
3107 pcagent->index = counters_index++;
3108 pcagent->category_name = g_strdup (category_name);
3109 pcagent->name = g_strdup (name);
3110 pcagent->type = (int) type;
3111 pcagent->value = value;
3112 pcagent->emitted = 0;
3113 pcagent->updated = 1;
3114 pcagent->deleted = 0;
3116 perfcounters = pcagent;
3122 perfcounters_sample (uint64_t timestamp)
3124 PerfCounterAgent *pcagent;
3128 mono_os_mutex_lock (&counters_mutex);
3130 /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3131 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3132 pcagent->deleted = 1;
3134 mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3136 perfcounters_emit ();
3139 EVENT_SIZE /* event */
3142 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3143 if (pcagent->deleted || !pcagent->updated)
3147 LEB128_SIZE /* index */ +
3148 BYTE_SIZE /* type */ +
3149 LEB128_SIZE /* value */
3159 LEB128_SIZE /* stop marker */
3162 ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3164 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3166 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3167 if (pcagent->deleted || !pcagent->updated)
3169 emit_uvalue (logbuffer, pcagent->index);
3170 emit_byte (logbuffer, MONO_COUNTER_LONG);
3171 emit_svalue (logbuffer, pcagent->value);
3173 pcagent->updated = 0;
3176 emit_value (logbuffer, 0);
3178 EXIT_LOG_EXPLICIT (DO_SEND);
3181 mono_os_mutex_unlock (&counters_mutex);
3185 counters_and_perfcounters_sample (void)
3187 uint64_t now = current_time ();
3189 counters_sample (now);
3190 perfcounters_sample (now);
3193 static mono_mutex_t coverage_mutex;
3194 static MonoConcurrentHashTable *coverage_methods = NULL;
3195 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3196 static MonoConcurrentHashTable *coverage_classes = NULL;
3198 static MonoConcurrentHashTable *filtered_classes = NULL;
3199 static MonoConcurrentHashTable *image_to_methods = NULL;
3200 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3201 static gboolean coverage_initialized = FALSE;
3203 static GPtrArray *coverage_data = NULL;
3204 static int previous_offset = 0;
3207 MonoLockFreeQueueNode node;
3220 free_coverage_entry (gpointer data, gpointer userdata)
3222 CoverageEntry *entry = (CoverageEntry *)data;
3223 g_free (entry->filename);
3228 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfilerCoverageData *entry)
3230 int offset = entry->il_offset - previous_offset;
3231 CoverageEntry *e = g_new (CoverageEntry, 1);
3233 previous_offset = entry->il_offset;
3236 e->counter = entry->counter;
3237 e->filename = g_strdup(entry->file_name ? entry->file_name : "");
3238 e->line = entry->line;
3239 e->column = entry->column;
3241 g_ptr_array_add (coverage_data, e);
3245 parse_generic_type_names(char *name)
3247 char *new_name, *ret;
3248 int within_generic_declaration = 0, generic_members = 1;
3250 if (name == NULL || *name == '\0')
3251 return g_strdup ("");
3253 if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3259 within_generic_declaration = 1;
3263 within_generic_declaration = 0;
3265 if (*(name - 1) != '<') {
3267 *new_name++ = '0' + generic_members;
3269 memcpy (new_name, "<>", 8);
3273 generic_members = 0;
3281 if (!within_generic_declaration)
3282 *new_name++ = *name;
3291 static int method_id;
3293 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3295 MonoMethod *method = (MonoMethod *)value;
3299 const char *image_name, *method_name, *sig, *first_filename;
3302 previous_offset = 0;
3303 coverage_data = g_ptr_array_new ();
3305 mono_profiler_get_coverage_data (log_profiler.handle, method, obtain_coverage_for_method);
3307 klass = mono_method_get_class (method);
3308 image = mono_class_get_image (klass);
3309 image_name = mono_image_get_name (image);
3311 sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3312 class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3313 method_name = mono_method_get_name (method);
3315 if (coverage_data->len != 0) {
3316 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3317 first_filename = entry->filename ? entry->filename : "";
3319 first_filename = "";
3321 image_name = image_name ? image_name : "";
3322 sig = sig ? sig : "";
3323 method_name = method_name ? method_name : "";
3325 ENTER_LOG (&coverage_methods_ctr, logbuffer,
3326 EVENT_SIZE /* event */ +
3327 strlen (image_name) + 1 /* image name */ +
3328 strlen (class_name) + 1 /* class name */ +
3329 strlen (method_name) + 1 /* method name */ +
3330 strlen (sig) + 1 /* signature */ +
3331 strlen (first_filename) + 1 /* first file name */ +
3332 LEB128_SIZE /* token */ +
3333 LEB128_SIZE /* method id */ +
3334 LEB128_SIZE /* entries */
3337 emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3338 emit_string (logbuffer, image_name, strlen (image_name) + 1);
3339 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3340 emit_string (logbuffer, method_name, strlen (method_name) + 1);
3341 emit_string (logbuffer, sig, strlen (sig) + 1);
3342 emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3344 emit_uvalue (logbuffer, mono_method_get_token (method));
3345 emit_uvalue (logbuffer, method_id);
3346 emit_value (logbuffer, coverage_data->len);
3348 EXIT_LOG_EXPLICIT (DO_SEND);
3350 for (i = 0; i < coverage_data->len; i++) {
3351 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3353 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3354 EVENT_SIZE /* event */ +
3355 LEB128_SIZE /* method id */ +
3356 LEB128_SIZE /* offset */ +
3357 LEB128_SIZE /* counter */ +
3358 LEB128_SIZE /* line */ +
3359 LEB128_SIZE /* column */
3362 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3363 emit_uvalue (logbuffer, method_id);
3364 emit_uvalue (logbuffer, entry->offset);
3365 emit_uvalue (logbuffer, entry->counter);
3366 emit_uvalue (logbuffer, entry->line);
3367 emit_uvalue (logbuffer, entry->column);
3369 EXIT_LOG_EXPLICIT (DO_SEND);
3374 g_free (class_name);
3376 g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3377 g_ptr_array_free (coverage_data, TRUE);
3378 coverage_data = NULL;
3381 /* This empties the queue */
3383 count_queue (MonoLockFreeQueue *queue)
3385 MonoLockFreeQueueNode *node;
3388 while ((node = mono_lock_free_queue_dequeue (queue))) {
3390 mono_thread_hazardous_try_free (node, g_free);
3397 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3399 MonoClass *klass = (MonoClass *)key;
3400 MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3403 const char *assembly_name;
3404 int number_of_methods, partially_covered;
3405 guint fully_covered;
3407 image = mono_class_get_image (klass);
3408 assembly_name = mono_image_get_name (image);
3409 class_name = mono_type_get_name (mono_class_get_type (klass));
3411 assembly_name = assembly_name ? assembly_name : "";
3412 number_of_methods = mono_class_num_methods (klass);
3413 fully_covered = count_queue (class_methods);
3414 /* We don't handle partial covered yet */
3415 partially_covered = 0;
3417 ENTER_LOG (&coverage_classes_ctr, logbuffer,
3418 EVENT_SIZE /* event */ +
3419 strlen (assembly_name) + 1 /* assembly name */ +
3420 strlen (class_name) + 1 /* class name */ +
3421 LEB128_SIZE /* no. methods */ +
3422 LEB128_SIZE /* fully covered */ +
3423 LEB128_SIZE /* partially covered */
3426 emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3427 emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3428 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3429 emit_uvalue (logbuffer, number_of_methods);
3430 emit_uvalue (logbuffer, fully_covered);
3431 emit_uvalue (logbuffer, partially_covered);
3433 EXIT_LOG_EXPLICIT (DO_SEND);
3435 g_free (class_name);
3439 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3441 MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3443 *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3445 *fully_covered = count_queue (image_methods);
3449 // FIXME: We don't handle partially covered yet.
3450 *partially_covered = 0;
3454 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3456 MonoAssembly *assembly = (MonoAssembly *)value;
3457 MonoImage *image = mono_assembly_get_image (assembly);
3458 const char *name, *guid, *filename;
3459 int number_of_methods = 0, partially_covered = 0;
3460 guint fully_covered = 0;
3462 name = mono_image_get_name (image);
3463 guid = mono_image_get_guid (image);
3464 filename = mono_image_get_filename (image);
3466 name = name ? name : "";
3467 guid = guid ? guid : "";
3468 filename = filename ? filename : "";
3470 get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3472 ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3473 EVENT_SIZE /* event */ +
3474 strlen (name) + 1 /* name */ +
3475 strlen (guid) + 1 /* guid */ +
3476 strlen (filename) + 1 /* file name */ +
3477 LEB128_SIZE /* no. methods */ +
3478 LEB128_SIZE /* fully covered */ +
3479 LEB128_SIZE /* partially covered */
3482 emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3483 emit_string (logbuffer, name, strlen (name) + 1);
3484 emit_string (logbuffer, guid, strlen (guid) + 1);
3485 emit_string (logbuffer, filename, strlen (filename) + 1);
3486 emit_uvalue (logbuffer, number_of_methods);
3487 emit_uvalue (logbuffer, fully_covered);
3488 emit_uvalue (logbuffer, partially_covered);
3490 EXIT_LOG_EXPLICIT (DO_SEND);
3494 dump_coverage (void)
3496 if (!coverage_initialized)
3501 mono_os_mutex_lock (&coverage_mutex);
3502 mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3503 mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3504 mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, NULL);
3505 mono_os_mutex_unlock (&coverage_mutex);
3508 static MonoLockFreeQueueNode *
3509 create_method_node (MonoMethod *method)
3511 MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3512 mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3513 node->method = method;
3515 return (MonoLockFreeQueueNode *) node;
3519 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3524 MonoAssembly *assembly;
3525 MonoMethodHeader *header;
3526 guint32 iflags, flags, code_size;
3527 char *fqn, *classname;
3528 gboolean has_positive, found;
3529 MonoLockFreeQueue *image_methods, *class_methods;
3530 MonoLockFreeQueueNode *node;
3532 g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3534 flags = mono_method_get_flags (method, &iflags);
3535 if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3536 (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/))
3539 // Don't need to do anything else if we're already tracking this method
3540 if (mono_conc_hashtable_lookup (coverage_methods, method))
3543 klass = mono_method_get_class (method);
3544 image = mono_class_get_image (klass);
3546 // Don't handle coverage for the core assemblies
3547 if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3550 if (prof->coverage_filters) {
3551 /* Check already filtered classes first */
3552 if (mono_conc_hashtable_lookup (filtered_classes, klass))
3555 classname = mono_type_get_name (mono_class_get_type (klass));
3557 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3559 // Check positive filters first
3560 has_positive = FALSE;
3562 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3563 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3565 if (filter [0] == '+') {
3566 filter = &filter [1];
3568 if (strstr (fqn, filter) != NULL)
3571 has_positive = TRUE;
3575 if (has_positive && !found) {
3576 mono_os_mutex_lock (&coverage_mutex);
3577 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3578 mono_os_mutex_unlock (&coverage_mutex);
3585 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3586 // FIXME: Is substring search sufficient?
3587 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3588 if (filter [0] == '+')
3592 filter = &filter [1];
3594 if (strstr (fqn, filter) != NULL) {
3595 mono_os_mutex_lock (&coverage_mutex);
3596 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3597 mono_os_mutex_unlock (&coverage_mutex);
3609 header = mono_method_get_header_checked (method, &error);
3610 mono_error_cleanup (&error);
3612 mono_method_header_get_code (header, &code_size, NULL);
3614 assembly = mono_image_get_assembly (image);
3616 // Need to keep the assemblies around for as long as they are kept in the hashtable
3617 // Nunit, for example, has a habit of unloading them before the coverage statistics are
3618 // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3619 mono_assembly_addref (assembly);
3621 mono_os_mutex_lock (&coverage_mutex);
3622 mono_conc_hashtable_insert (coverage_methods, method, method);
3623 mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3624 mono_os_mutex_unlock (&coverage_mutex);
3626 image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3628 if (image_methods == NULL) {
3629 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3630 mono_lock_free_queue_init (image_methods);
3631 mono_os_mutex_lock (&coverage_mutex);
3632 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3633 mono_os_mutex_unlock (&coverage_mutex);
3636 node = create_method_node (method);
3637 mono_lock_free_queue_enqueue (image_methods, node);
3639 class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3641 if (class_methods == NULL) {
3642 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3643 mono_lock_free_queue_init (class_methods);
3644 mono_os_mutex_lock (&coverage_mutex);
3645 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3646 mono_os_mutex_unlock (&coverage_mutex);
3649 node = create_method_node (method);
3650 mono_lock_free_queue_enqueue (class_methods, node);
3655 #define LINE_BUFFER_SIZE 4096
3656 /* Max file limit of 128KB */
3657 #define MAX_FILE_SIZE 128 * 1024
3659 get_file_content (FILE *stream)
3664 int res, offset = 0;
3666 res = fseek (stream, 0, SEEK_END);
3670 filesize = ftell (stream);
3674 res = fseek (stream, 0, SEEK_SET);
3678 if (filesize > MAX_FILE_SIZE)
3681 buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3682 while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3683 offset += bytes_read;
3685 /* NULL terminate our buffer */
3686 buffer[filesize] = '\0';
3691 get_next_line (char *contents, char **next_start)
3695 if (p == NULL || *p == '\0') {
3700 while (*p != '\n' && *p != '\0')
3705 *next_start = p + 1;
3713 init_suppressed_assemblies (void)
3719 suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3720 sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3721 if (sa_file == NULL)
3724 /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3725 content = get_file_content (sa_file);
3726 if (content == NULL)
3727 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting.");
3729 while ((line = get_next_line (content, &content))) {
3730 line = g_strchomp (g_strchug (line));
3731 /* No locking needed as we're doing initialization */
3732 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3739 parse_cov_filter_file (GPtrArray *filters, const char *file)
3741 FILE *filter_file = fopen (file, "r");
3743 if (filter_file == NULL) {
3744 mono_profiler_printf_err ("Could not open coverage filter file '%s'.", file);
3748 /* Don't need to free content as it is referred to by the lines stored in @filters */
3749 char *content = get_file_content (filter_file);
3751 if (content == NULL)
3752 mono_profiler_printf_err ("Coverage filter file '%s' is larger than 128kb - ignoring.", file);
3756 while ((line = get_next_line (content, &content)))
3757 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3759 fclose (filter_file);
3763 coverage_init (void)
3765 g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3767 mono_os_mutex_init (&coverage_mutex);
3768 coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3769 coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3770 coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3771 filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3772 image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3773 init_suppressed_assemblies ();
3775 coverage_initialized = TRUE;
3779 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3781 MonoAssembly *assembly = (MonoAssembly *)value;
3782 mono_assembly_close (assembly);
3786 free_sample_hit (gpointer p)
3788 mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3792 cleanup_reusable_samples (void)
3796 while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&log_profiler.sample_reuse_queue)))
3797 mono_thread_hazardous_try_free (sample, free_sample_hit);
3801 log_shutdown (MonoProfiler *prof)
3803 InterlockedWrite (&in_shutdown, 1);
3806 counters_and_perfcounters_sample ();
3812 if (write (prof->pipes [1], &c, 1) != 1) {
3813 mono_profiler_printf_err ("Could not write to log profiler pipe: %s", strerror (errno));
3817 mono_native_thread_join (prof->helper_thread);
3819 mono_os_mutex_destroy (&counters_mutex);
3821 MonoCounterAgent *mc_next;
3823 for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3824 mc_next = cur->next;
3828 PerfCounterAgent *pc_next;
3830 for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3831 pc_next = cur->next;
3836 * Ensure that we empty the LLS completely, even if some nodes are
3837 * not immediately removed upon calling mono_lls_remove (), by
3838 * iterating until the head is NULL.
3840 while (profiler_thread_list.head) {
3841 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3842 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3844 remove_thread (thread);
3845 } MONO_LLS_FOREACH_SAFE_END
3849 * Ensure that all threads have been freed, so that we don't miss any
3850 * buffers when we shut down the writer thread below.
3852 mono_thread_hazardous_try_free_all ();
3854 InterlockedWrite (&prof->run_dumper_thread, 0);
3855 mono_os_sem_post (&prof->dumper_queue_sem);
3856 mono_native_thread_join (prof->dumper_thread);
3857 mono_os_sem_destroy (&prof->dumper_queue_sem);
3859 InterlockedWrite (&prof->run_writer_thread, 0);
3860 mono_os_sem_post (&prof->writer_queue_sem);
3861 mono_native_thread_join (prof->writer_thread);
3862 mono_os_sem_destroy (&prof->writer_queue_sem);
3865 * Free all writer queue entries, and ensure that all sample hits will be
3866 * added to the sample reuse queue.
3868 mono_thread_hazardous_try_free_all ();
3870 cleanup_reusable_samples ();
3873 * Finally, make sure that all sample hits are freed. This should cover all
3874 * hazardous data from the profiler. We can now be sure that the runtime
3875 * won't later invoke free functions in the profiler library after it has
3878 mono_thread_hazardous_try_free_all ();
3880 gint32 state = InterlockedRead (&buffer_lock_state);
3882 g_assert (!(state & 0xFFFF) && "Why is the reader count still non-zero?");
3883 g_assert (!(state >> 16) && "Why is the exclusive lock still held?");
3885 #if defined (HAVE_SYS_ZLIB)
3887 gzclose (prof->gzfile);
3889 if (prof->pipe_output)
3890 pclose (prof->file);
3892 fclose (prof->file);
3894 mono_conc_hashtable_destroy (prof->method_table);
3895 mono_os_mutex_destroy (&prof->method_table_mutex);
3897 if (coverage_initialized) {
3898 mono_os_mutex_lock (&coverage_mutex);
3899 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3900 mono_os_mutex_unlock (&coverage_mutex);
3902 mono_conc_hashtable_destroy (coverage_methods);
3903 mono_conc_hashtable_destroy (coverage_assemblies);
3904 mono_conc_hashtable_destroy (coverage_classes);
3905 mono_conc_hashtable_destroy (filtered_classes);
3907 mono_conc_hashtable_destroy (image_to_methods);
3908 mono_conc_hashtable_destroy (suppressed_assemblies);
3909 mono_os_mutex_destroy (&coverage_mutex);
3914 g_free (prof->args);
3918 new_filename (const char* filename)
3920 time_t t = time (NULL);
3921 int pid = process_id ();
3926 int count_dates = 0;
3930 for (p = filename; *p; p++) {
3941 if (!count_dates && !count_pids)
3942 return pstrdup (filename);
3943 snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3945 snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3946 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3947 s_date = strlen (time_buf);
3948 s_pid = strlen (pid_buf);
3949 d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3950 for (p = filename; *p; p++) {
3957 strcpy (d, time_buf);
3960 } else if (*p == 'p') {
3961 strcpy (d, pid_buf);
3964 } else if (*p == '%') {
3977 add_to_fd_set (fd_set *set, int fd, int *max_fd)
3980 * This should only trigger for the basic FDs (server socket, pipes) at
3981 * startup if for some mysterious reason they're too large. In this case,
3982 * the profiler really can't function, and we're better off printing an
3983 * error and exiting.
3985 if (fd >= FD_SETSIZE) {
3986 mono_profiler_printf_err ("File descriptor is out of bounds for fd_set: %d", fd);
3997 helper_thread (void *arg)
3999 mono_threads_attach_tools_thread ();
4000 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4002 MonoProfilerThread *thread = init_thread (FALSE);
4004 GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4012 add_to_fd_set (&rfds, log_profiler.server_socket, &max_fd);
4013 add_to_fd_set (&rfds, log_profiler.pipes [0], &max_fd);
4015 for (gint i = 0; i < command_sockets->len; i++)
4016 add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4018 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4020 // Sleep for 1sec or until a file descriptor has data.
4021 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4025 mono_profiler_printf_err ("Could not poll in log profiler helper thread: %s", strerror (errno));
4030 counters_and_perfcounters_sample ();
4032 buffer_lock_excl ();
4034 sync_point (SYNC_POINT_PERIODIC);
4036 buffer_unlock_excl ();
4038 // Are we shutting down?
4039 if (FD_ISSET (log_profiler.pipes [0], &rfds)) {
4041 read (log_profiler.pipes [0], &c, 1);
4045 for (gint i = 0; i < command_sockets->len; i++) {
4046 int fd = g_array_index (command_sockets, int, i);
4048 if (!FD_ISSET (fd, &rfds))
4052 int len = read (fd, buf, sizeof (buf) - 1);
4058 // The other end disconnected.
4059 g_array_remove_index (command_sockets, i);
4067 if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4068 // Rely on the finalization callback triggering a GC.
4069 heapshot_requested = 1;
4070 mono_gc_finalize_notify ();
4074 if (FD_ISSET (log_profiler.server_socket, &rfds)) {
4075 int fd = accept (log_profiler.server_socket, NULL, NULL);
4078 if (fd >= FD_SETSIZE)
4081 g_array_append_val (command_sockets, fd);
4086 for (gint i = 0; i < command_sockets->len; i++)
4087 close (g_array_index (command_sockets, int, i));
4089 g_array_free (command_sockets, TRUE);
4091 send_log_unsafe (FALSE);
4092 deinit_thread (thread);
4094 mono_thread_info_detach ();
4100 start_helper_thread (void)
4102 if (pipe (log_profiler.pipes) == -1) {
4103 mono_profiler_printf_err ("Could not create log profiler pipe: %s", strerror (errno));
4107 log_profiler.server_socket = socket (PF_INET, SOCK_STREAM, 0);
4109 if (log_profiler.server_socket == -1) {
4110 mono_profiler_printf_err ("Could not create log profiler server socket: %s", strerror (errno));
4114 struct sockaddr_in server_address;
4116 memset (&server_address, 0, sizeof (server_address));
4117 server_address.sin_family = AF_INET;
4118 server_address.sin_addr.s_addr = INADDR_ANY;
4119 server_address.sin_port = htons (log_profiler.command_port);
4121 if (bind (log_profiler.server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4122 mono_profiler_printf_err ("Could not bind log profiler server socket on port %d: %s", log_profiler.command_port, strerror (errno));
4123 close (log_profiler.server_socket);
4127 if (listen (log_profiler.server_socket, 1) == -1) {
4128 mono_profiler_printf_err ("Could not listen on log profiler server socket: %s", strerror (errno));
4129 close (log_profiler.server_socket);
4133 socklen_t slen = sizeof (server_address);
4135 if (getsockname (log_profiler.server_socket, (struct sockaddr *) &server_address, &slen)) {
4136 mono_profiler_printf_err ("Could not retrieve assigned port for log profiler server socket: %s", strerror (errno));
4137 close (log_profiler.server_socket);
4141 log_profiler.command_port = ntohs (server_address.sin_port);
4143 if (!mono_native_thread_create (&log_profiler.helper_thread, helper_thread, NULL)) {
4144 mono_profiler_printf_err ("Could not start log profiler helper thread");
4145 close (log_profiler.server_socket);
4151 free_writer_entry (gpointer p)
4153 mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4157 handle_writer_queue_entry (void)
4159 WriterQueueEntry *entry;
4161 if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&log_profiler.writer_queue))) {
4162 if (!entry->methods)
4165 gboolean wrote_methods = FALSE;
4168 * Encode the method events in a temporary log buffer that we
4169 * flush to disk before the main buffer, ensuring that all
4170 * methods have metadata emitted before they're referenced.
4172 * We use a 'proper' thread-local buffer for this as opposed
4173 * to allocating and freeing a buffer by hand because the call
4174 * to mono_method_full_name () below may trigger class load
4175 * events when it retrieves the signature of the method. So a
4176 * thread-local buffer needs to exist when such events occur.
4178 for (guint i = 0; i < entry->methods->len; i++) {
4179 MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4181 if (mono_conc_hashtable_lookup (log_profiler.method_table, info->method))
4182 goto free_info; // This method already has metadata emitted.
4185 * Other threads use this hash table to get a general
4186 * idea of whether a method has already been emitted to
4187 * the stream. Due to the way we add to this table, it
4188 * can easily happen that multiple threads queue up the
4189 * same methods, but that's OK since eventually all
4190 * methods will be in this table and the thread-local
4191 * method lists will just be empty for the rest of the
4194 mono_os_mutex_lock (&log_profiler.method_table_mutex);
4195 mono_conc_hashtable_insert (log_profiler.method_table, info->method, info->method);
4196 mono_os_mutex_unlock (&log_profiler.method_table_mutex);
4198 char *name = mono_method_full_name (info->method, 1);
4199 int nlen = strlen (name) + 1;
4200 void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4201 int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4203 ENTER_LOG (&method_jits_ctr, logbuffer,
4204 EVENT_SIZE /* event */ +
4205 LEB128_SIZE /* method */ +
4206 LEB128_SIZE /* start */ +
4207 LEB128_SIZE /* size */ +
4211 emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4212 emit_method_inner (logbuffer, info->method);
4213 emit_ptr (logbuffer, cstart);
4214 emit_value (logbuffer, csize);
4216 memcpy (logbuffer->cursor, name, nlen);
4217 logbuffer->cursor += nlen;
4219 EXIT_LOG_EXPLICIT (NO_SEND);
4223 wrote_methods = TRUE;
4229 g_ptr_array_free (entry->methods, TRUE);
4231 if (wrote_methods) {
4232 MonoProfilerThread *thread = PROF_TLS_GET ();
4234 dump_buffer_threadless (thread->buffer);
4235 init_buffer_state (thread);
4239 dump_buffer (entry->buffer);
4241 mono_thread_hazardous_try_free (entry, free_writer_entry);
4250 writer_thread (void *arg)
4252 mono_threads_attach_tools_thread ();
4253 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4257 MonoProfilerThread *thread = init_thread (FALSE);
4259 while (InterlockedRead (&log_profiler.run_writer_thread)) {
4260 mono_os_sem_wait (&log_profiler.writer_queue_sem, MONO_SEM_FLAGS_NONE);
4261 handle_writer_queue_entry ();
4264 /* Drain any remaining entries on shutdown. */
4265 while (handle_writer_queue_entry ());
4267 free_buffer (thread->buffer, thread->buffer->size);
4268 deinit_thread (thread);
4270 mono_thread_info_detach ();
4276 start_writer_thread (void)
4278 InterlockedWrite (&log_profiler.run_writer_thread, 1);
4280 if (!mono_native_thread_create (&log_profiler.writer_thread, writer_thread, NULL)) {
4281 mono_profiler_printf_err ("Could not start log profiler writer thread");
4287 reuse_sample_hit (gpointer p)
4289 SampleHit *sample = p;
4291 mono_lock_free_queue_node_unpoison (&sample->node);
4292 mono_lock_free_queue_enqueue (&log_profiler.sample_reuse_queue, &sample->node);
4296 handle_dumper_queue_entry (void)
4300 if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&log_profiler.dumper_queue))) {
4301 for (int i = 0; i < sample->count; ++i) {
4302 MonoMethod *method = sample->frames [i].method;
4303 MonoDomain *domain = sample->frames [i].domain;
4304 void *address = sample->frames [i].base_address;
4307 g_assert (domain && "What happened to the domain pointer?");
4308 g_assert (address && "What happened to the instruction pointer?");
4310 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4313 sample->frames [i].method = mono_jit_info_get_method (ji);
4317 ENTER_LOG (&sample_hits_ctr, logbuffer,
4318 EVENT_SIZE /* event */ +
4319 LEB128_SIZE /* tid */ +
4320 LEB128_SIZE /* count */ +
4322 LEB128_SIZE /* ip */
4324 LEB128_SIZE /* managed count */ +
4326 LEB128_SIZE /* method */
4330 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4331 emit_ptr (logbuffer, (void *) sample->tid);
4332 emit_value (logbuffer, 1);
4334 // TODO: Actual native unwinding.
4335 for (int i = 0; i < 1; ++i) {
4336 emit_ptr (logbuffer, sample->ip);
4337 add_code_pointer ((uintptr_t) sample->ip);
4340 /* new in data version 6 */
4341 emit_uvalue (logbuffer, sample->count);
4343 for (int i = 0; i < sample->count; ++i)
4344 emit_method (logbuffer, sample->frames [i].method);
4346 EXIT_LOG_EXPLICIT (DO_SEND);
4348 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4350 dump_unmanaged_coderefs ();
4357 dumper_thread (void *arg)
4359 mono_threads_attach_tools_thread ();
4360 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4362 MonoProfilerThread *thread = init_thread (FALSE);
4364 while (InterlockedRead (&log_profiler.run_dumper_thread)) {
4366 * Flush samples every second so it doesn't seem like the profiler is
4367 * not working if the program is mostly idle.
4369 if (mono_os_sem_timedwait (&log_profiler.dumper_queue_sem, 1000, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_TIMEDOUT)
4370 send_log_unsafe (FALSE);
4372 handle_dumper_queue_entry ();
4375 /* Drain any remaining entries on shutdown. */
4376 while (handle_dumper_queue_entry ());
4378 send_log_unsafe (FALSE);
4379 deinit_thread (thread);
4381 mono_thread_info_detach ();
4387 start_dumper_thread (void)
4389 InterlockedWrite (&log_profiler.run_dumper_thread, 1);
4391 if (!mono_native_thread_create (&log_profiler.dumper_thread, dumper_thread, NULL)) {
4392 mono_profiler_printf_err ("Could not start log profiler dumper thread");
4398 register_counter (const char *name, gint32 *counter)
4400 mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4404 runtime_initialized (MonoProfiler *profiler)
4406 InterlockedWrite (&runtime_inited, 1);
4408 register_counter ("Sample events allocated", &sample_allocations_ctr);
4409 register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4411 register_counter ("Event: Sync points", &sync_points_ctr);
4412 register_counter ("Event: Heap objects", &heap_objects_ctr);
4413 register_counter ("Event: Heap starts", &heap_starts_ctr);
4414 register_counter ("Event: Heap ends", &heap_ends_ctr);
4415 register_counter ("Event: Heap roots", &heap_roots_ctr);
4416 register_counter ("Event: GC events", &gc_events_ctr);
4417 register_counter ("Event: GC resizes", &gc_resizes_ctr);
4418 register_counter ("Event: GC allocations", &gc_allocs_ctr);
4419 register_counter ("Event: GC moves", &gc_moves_ctr);
4420 register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4421 register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4422 register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4423 register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4424 register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4425 register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4426 register_counter ("Event: Image loads", &image_loads_ctr);
4427 register_counter ("Event: Image unloads", &image_unloads_ctr);
4428 register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4429 register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4430 register_counter ("Event: Class loads", &class_loads_ctr);
4431 register_counter ("Event: Class unloads", &class_unloads_ctr);
4432 register_counter ("Event: Method entries", &method_entries_ctr);
4433 register_counter ("Event: Method exits", &method_exits_ctr);
4434 register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4435 register_counter ("Event: Method JITs", &method_jits_ctr);
4436 register_counter ("Event: Code buffers", &code_buffers_ctr);
4437 register_counter ("Event: Exception throws", &exception_throws_ctr);
4438 register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4439 register_counter ("Event: Monitor events", &monitor_events_ctr);
4440 register_counter ("Event: Thread starts", &thread_starts_ctr);
4441 register_counter ("Event: Thread ends", &thread_ends_ctr);
4442 register_counter ("Event: Thread names", &thread_names_ctr);
4443 register_counter ("Event: Domain loads", &domain_loads_ctr);
4444 register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4445 register_counter ("Event: Domain names", &domain_names_ctr);
4446 register_counter ("Event: Context loads", &context_loads_ctr);
4447 register_counter ("Event: Context unloads", &context_unloads_ctr);
4448 register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4449 register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4450 register_counter ("Event: Sample hits", &sample_hits_ctr);
4451 register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4452 register_counter ("Event: Counter samples", &counter_samples_ctr);
4453 register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4454 register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4455 register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4456 register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4457 register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4458 register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4463 * We must start the helper thread before the writer thread. This is
4464 * because the helper thread sets up the command port which is written to
4465 * the log header by the writer thread.
4467 start_helper_thread ();
4468 start_writer_thread ();
4469 start_dumper_thread ();
4473 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4477 log_profiler.args = pstrdup (args);
4478 log_profiler.command_port = command_port;
4480 //If filename begin with +, append the pid at the end
4481 if (filename && *filename == '+')
4482 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4486 filename = "|mprof-report -";
4488 filename = "output.mlpd";
4489 nf = (char*)filename;
4491 nf = new_filename (filename);
4493 int s = strlen (nf) + 32;
4494 char *p = (char *) g_malloc (s);
4495 snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4501 log_profiler.file = popen (nf + 1, "w");
4502 log_profiler.pipe_output = 1;
4503 } else if (*nf == '#') {
4504 int fd = strtol (nf + 1, NULL, 10);
4505 log_profiler.file = fdopen (fd, "a");
4507 log_profiler.file = fopen (nf, "wb");
4509 if (!log_profiler.file) {
4510 mono_profiler_printf_err ("Could not create log profiler output file '%s'.", nf);
4514 #if defined (HAVE_SYS_ZLIB)
4516 log_profiler.gzfile = gzdopen (fileno (log_profiler.file), "wb");
4520 * If you hit this assert while increasing MAX_FRAMES, you need to increase
4521 * SAMPLE_BLOCK_SIZE as well.
4523 g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4525 // FIXME: We should free this stuff too.
4526 mono_lock_free_allocator_init_size_class (&log_profiler.sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4527 mono_lock_free_allocator_init_allocator (&log_profiler.sample_allocator, &log_profiler.sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4529 mono_lock_free_queue_init (&log_profiler.sample_reuse_queue);
4531 g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4533 // FIXME: We should free this stuff too.
4534 mono_lock_free_allocator_init_size_class (&log_profiler.writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4535 mono_lock_free_allocator_init_allocator (&log_profiler.writer_entry_allocator, &log_profiler.writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4537 mono_lock_free_queue_init (&log_profiler.writer_queue);
4538 mono_os_sem_init (&log_profiler.writer_queue_sem, 0);
4540 mono_lock_free_queue_init (&log_profiler.dumper_queue);
4541 mono_os_sem_init (&log_profiler.dumper_queue_sem, 0);
4543 mono_os_mutex_init (&log_profiler.method_table_mutex);
4544 log_profiler.method_table = mono_conc_hashtable_new (NULL, NULL);
4549 log_profiler.coverage_filters = filters;
4551 log_profiler.startup_time = current_time ();
4555 * declaration to silence the compiler: this is the entry point that
4556 * mono will load from the shared library and call.
4559 mono_profiler_init (const char *desc);
4562 mono_profiler_init_log (const char *desc);
4565 * this is the entry point that will be used when the profiler
4566 * is embedded inside the main executable.
4569 mono_profiler_init_log (const char *desc)
4571 mono_profiler_init (desc);
4575 mono_profiler_init (const char *desc)
4577 GPtrArray *filters = NULL;
4579 proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4581 //XXX maybe later cleanup to use config directly
4582 nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4583 no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4584 do_report = config.do_report;
4585 do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4586 hs_mode_ondemand = config.hs_mode_ondemand;
4587 hs_mode_ms = config.hs_mode_ms;
4588 hs_mode_gc = config.hs_mode_gc;
4589 do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4590 use_zip = config.use_zip;
4591 command_port = config.command_port;
4592 num_frames = config.num_frames;
4593 notraces = config.notraces;
4594 max_allocated_sample_hits = config.max_allocated_sample_hits;
4595 max_call_depth = config.max_call_depth;
4596 do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4598 if (config.cov_filter_files) {
4599 filters = g_ptr_array_new ();
4601 for (i = 0; i < config.cov_filter_files->len; ++i) {
4602 const char *name = config.cov_filter_files->pdata [i];
4603 parse_cov_filter_file (filters, name);
4611 create_profiler (desc, config.output_filename, filters);
4613 mono_lls_init (&profiler_thread_list, NULL);
4615 MonoProfilerHandle handle = log_profiler.handle = mono_profiler_install (&log_profiler);
4617 //Required callbacks
4618 mono_profiler_set_runtime_shutdown_end_callback (handle, log_shutdown);
4619 mono_profiler_set_runtime_initialized_callback (handle, runtime_initialized);
4621 mono_profiler_set_gc_event_callback (handle, gc_event);
4622 mono_profiler_set_gc_resize_callback (handle, gc_resize);
4623 mono_profiler_set_thread_started_callback (handle, thread_start);
4624 mono_profiler_set_thread_stopped_callback (handle, thread_end);
4626 //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4627 mono_profiler_set_thread_name_callback (handle, thread_name);
4629 if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4630 mono_profiler_set_domain_loaded_callback (handle, domain_loaded);
4631 mono_profiler_set_domain_unloading_callback (handle, domain_unloaded);
4632 mono_profiler_set_domain_name_callback (handle, domain_name);
4635 if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4636 mono_profiler_set_assembly_loaded_callback (handle, assembly_loaded);
4637 mono_profiler_set_assembly_unloading_callback (handle, assembly_unloaded);
4640 if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4641 mono_profiler_set_image_loaded_callback (handle, image_loaded);
4642 mono_profiler_set_image_unloading_callback (handle, image_unloaded);
4645 if (config.effective_mask & PROFLOG_CLASS_EVENTS)
4646 mono_profiler_set_class_loaded_callback (handle, class_loaded);
4648 if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4649 mono_profiler_set_jit_done_callback (handle, method_jitted);
4650 mono_profiler_set_jit_code_buffer_callback (handle, code_buffer_new);
4653 if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4654 mono_profiler_set_exception_throw_callback (handle, throw_exc);
4655 mono_profiler_set_exception_clause_callback (handle, clause_exc);
4658 if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4659 mono_profiler_enable_allocations ();
4660 mono_profiler_set_gc_allocation_callback (handle, gc_alloc);
4663 //PROFLOG_GC_EVENTS is mandatory
4664 //PROFLOG_THREAD_EVENTS is mandatory
4666 if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4667 mono_profiler_set_call_instrumentation_filter_callback (handle, method_filter);
4668 mono_profiler_set_method_enter_callback (handle, method_enter);
4669 mono_profiler_set_method_leave_callback (handle, method_leave);
4670 mono_profiler_set_method_exception_leave_callback (handle, method_exc_leave);
4673 if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS)
4674 mono_profiler_set_coverage_filter_callback (handle, coverage_filter);
4676 if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4677 mono_profiler_enable_sampling (handle);
4679 if (!mono_profiler_set_sample_mode (handle, config.sampling_mode, config.sample_freq))
4680 mono_profiler_printf_err ("Another profiler controls sampling parameters; the log profiler will not be able to modify them.");
4682 mono_profiler_set_sample_hit_callback (handle, mono_sample_hit);
4685 if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4686 mono_profiler_set_monitor_contention_callback (handle, monitor_contention);
4687 mono_profiler_set_monitor_acquired_callback (handle, monitor_acquired);
4688 mono_profiler_set_monitor_failed_callback (handle, monitor_failed);
4691 if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS)
4692 mono_profiler_set_gc_moves_callback (handle, gc_moves);
4694 if (config.effective_mask & PROFLOG_GC_ROOT_EVENTS)
4695 mono_profiler_set_gc_roots_callback (handle, gc_roots);
4697 if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4698 mono_profiler_set_context_loaded_callback (handle, context_loaded);
4699 mono_profiler_set_context_unloaded_callback (handle, context_unloaded);
4702 if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4703 mono_profiler_set_gc_finalizing_callback (handle, finalize_begin);
4704 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4705 mono_profiler_set_gc_finalizing_object_callback (handle, finalize_object_begin);
4706 mono_profiler_set_gc_finalized_object_callback (handle, finalize_object_end);
4707 } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4708 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4709 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4712 //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4714 if (config.effective_mask & PROFLOG_GC_HANDLE_EVENTS) {
4715 mono_profiler_set_gc_handle_created_callback (handle, gc_handle_created);
4716 mono_profiler_set_gc_handle_deleted_callback (handle, gc_handle_deleted);