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 // Convenience pointer to the profiler structure.
462 MonoProfiler *profiler;
464 // Was this thread added to the LLS?
467 // The current log buffer for this thread.
470 // Methods referenced by events in `buffer`, see `MethodInfo`.
473 // Current call depth for enter/leave events.
476 // Indicates whether this thread is currently writing to its `buffer`.
479 // Has this thread written a thread end event to `buffer`?
482 // Stored in `buffer_lock_state` to take the exclusive lock.
484 } MonoProfilerThread;
486 // Do not use these TLS macros directly unless you know what you're doing.
490 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
491 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
492 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
493 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
495 static DWORD profiler_tls;
499 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
500 #define PROF_TLS_GET() (profiler_tls)
501 #define PROF_TLS_INIT()
502 #define PROF_TLS_FREE()
504 static __thread MonoProfilerThread *profiler_tls;
508 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
509 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
510 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
511 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
513 static pthread_key_t profiler_tls;
520 return (uintptr_t) mono_native_thread_id_get ();
527 return (uintptr_t) GetCurrentProcessId ();
529 return (uintptr_t) getpid ();
534 static mach_timebase_info_data_t timebase_info;
535 #elif defined (HOST_WIN32)
536 static LARGE_INTEGER pcounter_freq;
539 #define TICKS_PER_SEC 1000000000LL
545 uint64_t time = mach_absolute_time ();
547 time *= timebase_info.numer;
548 time /= timebase_info.denom;
551 #elif defined (HOST_WIN32)
554 QueryPerformanceCounter (&value);
556 return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
557 #elif defined (CLOCK_MONOTONIC)
558 struct timespec tspec;
560 clock_gettime (CLOCK_MONOTONIC, &tspec);
562 return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
566 gettimeofday (&tv, NULL);
568 return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
572 static int timer_overhead;
578 mach_timebase_info (&timebase_info);
579 #elif defined (HOST_WIN32)
580 QueryPerformanceFrequency (&pcounter_freq);
583 uint64_t time_start = current_time ();
585 for (int i = 0; i < 256; ++i)
588 uint64_t time_end = current_time ();
590 timer_overhead = (time_end - time_start) / 256;
594 * These macros should be used when writing an event to a log buffer. They
595 * take care of a bunch of stuff that can be repetitive and error-prone, such
596 * as attaching the current thread, acquiring/releasing the buffer lock,
597 * incrementing the event counter, expanding the log buffer, etc. They also
598 * create a scope so that it's harder to leak the LogBuffer pointer, which can
599 * be problematic as the pointer is unstable when the buffer lock isn't
602 * If the calling thread is already attached, these macros will not alter its
603 * attach mode (i.e. whether it's added to the LLS). If the thread is not
604 * attached, init_thread () will be called with add_to_lls = TRUE.
607 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
609 MonoProfilerThread *thread__ = get_thread (); \
610 if (thread__->attached) \
612 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
613 thread__->busy = TRUE; \
614 InterlockedIncrement ((COUNTER)); \
615 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
617 #define EXIT_LOG_EXPLICIT(SEND) \
618 thread__->busy = FALSE; \
620 send_log_unsafe (TRUE); \
621 if (thread__->attached) \
625 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
627 #define NO_SEND FALSE
629 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
631 typedef struct _BinaryObject BinaryObject;
632 struct _BinaryObject {
638 static MonoProfiler *log_profiler;
640 struct _MonoProfiler {
641 MonoProfilerHandle handle;
643 #if defined (HAVE_SYS_ZLIB)
647 uint64_t startup_time;
652 MonoNativeThreadId helper_thread;
653 MonoNativeThreadId writer_thread;
654 MonoNativeThreadId dumper_thread;
655 volatile gint32 run_writer_thread;
656 MonoLockFreeAllocSizeClass writer_entry_size_class;
657 MonoLockFreeAllocator writer_entry_allocator;
658 MonoLockFreeQueue writer_queue;
659 MonoSemType writer_queue_sem;
660 MonoConcurrentHashTable *method_table;
661 mono_mutex_t method_table_mutex;
662 volatile gint32 run_dumper_thread;
663 MonoLockFreeQueue dumper_queue;
664 MonoSemType dumper_queue_sem;
665 MonoLockFreeAllocSizeClass sample_size_class;
666 MonoLockFreeAllocator sample_allocator;
667 MonoLockFreeQueue sample_reuse_queue;
668 BinaryObject *binary_objects;
669 GPtrArray *coverage_filters;
673 MonoLockFreeQueueNode node;
678 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
687 pstrdup (const char *s)
689 int len = strlen (s) + 1;
690 char *p = (char *) g_malloc (len);
696 alloc_buffer (int size)
698 return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
702 free_buffer (void *buf, int size)
704 mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
708 create_buffer (uintptr_t tid, int bytes)
710 LogBuffer* buf = (LogBuffer *) alloc_buffer (MAX (BUFFER_SIZE, bytes));
712 InterlockedIncrement (&buffer_allocations_ctr);
714 buf->size = BUFFER_SIZE;
715 buf->time_base = current_time ();
716 buf->last_time = buf->time_base;
717 buf->buf_end = (unsigned char *) buf + buf->size;
718 buf->cursor = buf->buf;
719 buf->thread_id = tid;
725 * Must be called with the reader lock held if thread is the current thread, or
726 * the exclusive lock if thread is a different thread. However, if thread is
727 * the current thread, and init_thread () was called with add_to_lls = FALSE,
728 * then no locking is necessary.
731 init_buffer_state (MonoProfilerThread *thread)
733 thread->buffer = create_buffer (thread->node.key, 0);
734 thread->methods = NULL;
738 clear_hazard_pointers (MonoThreadHazardPointers *hp)
740 mono_hazard_pointer_clear (hp, 0);
741 mono_hazard_pointer_clear (hp, 1);
742 mono_hazard_pointer_clear (hp, 2);
745 static MonoProfilerThread *
746 init_thread (MonoProfiler *prof, gboolean add_to_lls)
748 MonoProfilerThread *thread = PROF_TLS_GET ();
751 * Sometimes we may try to initialize a thread twice. One example is the
752 * main thread: We initialize it when setting up the profiler, but we will
753 * also get a thread_start () callback for it. Another example is when
754 * attaching new threads to the runtime: We may get a gc_alloc () callback
755 * for that thread's thread object (where we initialize it), soon followed
756 * by a thread_start () callback.
758 * These cases are harmless anyhow. Just return if we've already done the
759 * initialization work.
764 thread = g_malloc (sizeof (MonoProfilerThread));
765 thread->node.key = thread_id ();
766 thread->profiler = prof;
767 thread->attached = add_to_lls;
768 thread->call_depth = 0;
770 thread->ended = FALSE;
772 init_buffer_state (thread);
774 thread->small_id = mono_thread_info_register_small_id ();
777 * Some internal profiler threads don't need to be cleaned up
778 * by the main thread on shutdown.
781 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
782 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
783 clear_hazard_pointers (hp);
786 PROF_TLS_SET (thread);
791 // Only valid if init_thread () was called with add_to_lls = FALSE.
793 deinit_thread (MonoProfilerThread *thread)
795 g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
801 static MonoProfilerThread *
804 return init_thread (log_profiler, TRUE);
807 // Only valid if init_thread () was called with add_to_lls = FALSE.
809 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
811 LogBuffer *old = thread->buffer;
813 if (old->cursor + bytes < old->buf_end)
816 LogBuffer *new_ = create_buffer (thread->node.key, bytes);
818 thread->buffer = new_;
824 * This is a reader/writer spin lock of sorts used to protect log buffers.
825 * When a thread modifies its own log buffer, it increments the reader
826 * count. When a thread wants to access log buffers of other threads, it
827 * takes the exclusive lock.
829 * `buffer_lock_state` holds the reader count in its lower 16 bits, and
830 * the small ID of the thread currently holding the exclusive (writer)
831 * lock in its upper 16 bits. Both can be zero. It's important that the
832 * whole lock state is a single word that can be read/written atomically
833 * to avoid race conditions where there could end up being readers while
834 * the writer lock is held.
836 * The lock is writer-biased. When a thread wants to take the exclusive
837 * lock, it increments `buffer_lock_exclusive_intent` which will make new
838 * readers spin until it's back to zero, then takes the exclusive lock
839 * once the reader count has reached zero. After releasing the exclusive
840 * lock, it decrements `buffer_lock_exclusive_intent`, which, when it
841 * reaches zero again, allows readers to increment the reader count.
843 * The writer bias is necessary because we take the exclusive lock in
844 * `gc_event ()` during STW. If the writer bias was not there, and a
845 * program had a large number of threads, STW-induced pauses could be
846 * significantly longer than they have to be. Also, we emit periodic
847 * sync points from the helper thread, which requires taking the
848 * exclusive lock, and we need those to arrive with a reasonably
849 * consistent frequency so that readers don't have to queue up too many
850 * events between sync points.
852 * The lock does not support recursion.
854 static volatile gint32 buffer_lock_state;
855 static volatile gint32 buffer_lock_exclusive_intent;
861 * If the thread holding the exclusive lock tries to modify the
862 * reader count, just make it a no-op. This way, we also avoid
863 * invoking the GC safe point macros below, which could break if
864 * done from a thread that is currently the initiator of STW.
866 * In other words, we rely on the fact that the GC thread takes
867 * the exclusive lock in the gc_event () callback when the world
870 if (InterlockedRead (&buffer_lock_state) != get_thread ()->small_id << 16) {
877 // Hold off if a thread wants to take the exclusive lock.
878 while (InterlockedRead (&buffer_lock_exclusive_intent))
879 mono_thread_info_yield ();
881 old = InterlockedRead (&buffer_lock_state);
883 // Is a thread holding the exclusive lock?
885 mono_thread_info_yield ();
890 } while (InterlockedCompareExchange (&buffer_lock_state, new_, old) != old);
895 mono_memory_barrier ();
901 mono_memory_barrier ();
903 gint32 state = InterlockedRead (&buffer_lock_state);
905 // See the comment in buffer_lock ().
906 if (state == PROF_TLS_GET ()->small_id << 16)
909 g_assert (state && "Why are we decrementing a zero reader count?");
910 g_assert (!(state >> 16) && "Why is the exclusive lock held?");
912 InterlockedDecrement (&buffer_lock_state);
916 buffer_lock_excl (void)
918 gint32 new_ = get_thread ()->small_id << 16;
920 g_assert (InterlockedRead (&buffer_lock_state) != new_ && "Why are we taking the exclusive lock twice?");
922 InterlockedIncrement (&buffer_lock_exclusive_intent);
926 while (InterlockedCompareExchange (&buffer_lock_state, new_, 0))
927 mono_thread_info_yield ();
931 mono_memory_barrier ();
935 buffer_unlock_excl (void)
937 mono_memory_barrier ();
939 gint32 state = InterlockedRead (&buffer_lock_state);
940 gint32 excl = state >> 16;
942 g_assert (excl && "Why is the exclusive lock not held?");
943 g_assert (excl == PROF_TLS_GET ()->small_id && "Why does another thread hold the exclusive lock?");
944 g_assert (!(state & 0xFFFF) && "Why are there readers when the exclusive lock is held?");
946 InterlockedWrite (&buffer_lock_state, 0);
947 InterlockedDecrement (&buffer_lock_exclusive_intent);
951 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
956 uint8_t b = value & 0x7f;
959 if (value != 0) /* more bytes to come */
969 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
972 int negative = (value < 0);
973 unsigned int size = sizeof (intptr_t) * 8;
981 /* the following is unnecessary if the
982 * implementation of >>= uses an arithmetic rather
983 * than logical shift for a signed left operand
987 value |= - ((intptr_t) 1 <<(size - 7));
989 /* sign bit of byte is second high order bit (0x40) */
990 if ((value == 0 && !(byte & 0x40)) ||
991 (value == -1 && (byte & 0x40)))
1003 emit_byte (LogBuffer *logbuffer, int value)
1005 logbuffer->cursor [0] = value;
1006 logbuffer->cursor++;
1008 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1012 emit_value (LogBuffer *logbuffer, int value)
1014 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1016 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1020 emit_time (LogBuffer *logbuffer, uint64_t value)
1022 uint64_t tdiff = value - logbuffer->last_time;
1023 encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
1024 logbuffer->last_time = value;
1026 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1030 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
1032 emit_byte (logbuffer, event);
1033 emit_time (logbuffer, time);
1037 emit_event (LogBuffer *logbuffer, int event)
1039 emit_event_time (logbuffer, event, current_time ());
1043 emit_svalue (LogBuffer *logbuffer, int64_t value)
1045 encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1047 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1051 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
1053 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1055 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1059 emit_ptr (LogBuffer *logbuffer, const void *ptr)
1061 if (!logbuffer->ptr_base)
1062 logbuffer->ptr_base = (uintptr_t) ptr;
1064 emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
1066 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1070 emit_method_inner (LogBuffer *logbuffer, void *method)
1072 if (!logbuffer->method_base) {
1073 logbuffer->method_base = (intptr_t) method;
1074 logbuffer->last_method = (intptr_t) method;
1077 encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1078 logbuffer->last_method = (intptr_t) method;
1080 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1083 // The reader lock must be held.
1085 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1087 MonoProfilerThread *thread = get_thread ();
1089 if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1090 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1092 info->method = method;
1094 info->time = current_time ();
1096 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1097 g_ptr_array_add (arr, info);
1102 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1104 register_method_local (method, NULL);
1105 emit_method_inner (logbuffer, method);
1109 emit_obj (LogBuffer *logbuffer, void *ptr)
1111 if (!logbuffer->obj_base)
1112 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1114 emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1116 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1120 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1124 for (; i < size; i++) {
1127 emit_byte (logbuffer, str [i]);
1130 emit_byte (logbuffer, '\0');
1134 emit_double (LogBuffer *logbuffer, double value)
1137 unsigned char buffer[8];
1138 memcpy (buffer, &value, 8);
1139 #if G_BYTE_ORDER == G_BIG_ENDIAN
1140 for (i = 7; i >= 0; i--)
1142 for (i = 0; i < 8; i++)
1144 emit_byte (logbuffer, buffer[i]);
1148 write_int16 (char *buf, int32_t value)
1151 for (i = 0; i < 2; ++i) {
1159 write_int32 (char *buf, int32_t value)
1162 for (i = 0; i < 4; ++i) {
1170 write_int64 (char *buf, int64_t value)
1173 for (i = 0; i < 8; ++i) {
1181 write_header_string (char *p, const char *str)
1183 size_t len = strlen (str) + 1;
1185 p = write_int32 (p, len);
1192 dump_header (MonoProfiler *profiler)
1194 const char *args = profiler->args;
1195 const char *arch = mono_config_get_cpu ();
1196 const char *os = mono_config_get_os ();
1198 char *hbuf = g_malloc (
1199 sizeof (gint32) /* header id */ +
1200 sizeof (gint8) /* major version */ +
1201 sizeof (gint8) /* minor version */ +
1202 sizeof (gint8) /* data version */ +
1203 sizeof (gint8) /* word size */ +
1204 sizeof (gint64) /* startup time */ +
1205 sizeof (gint32) /* timer overhead */ +
1206 sizeof (gint32) /* flags */ +
1207 sizeof (gint32) /* process id */ +
1208 sizeof (gint16) /* command port */ +
1209 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1210 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1211 sizeof (gint32) + strlen (os) + 1 /* operating system */
1215 p = write_int32 (p, LOG_HEADER_ID);
1216 *p++ = LOG_VERSION_MAJOR;
1217 *p++ = LOG_VERSION_MINOR;
1218 *p++ = LOG_DATA_VERSION;
1219 *p++ = sizeof (void *);
1220 p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1221 p = write_int32 (p, timer_overhead);
1222 p = write_int32 (p, 0); /* flags */
1223 p = write_int32 (p, process_id ());
1224 p = write_int16 (p, profiler->command_port);
1225 p = write_header_string (p, args);
1226 p = write_header_string (p, arch);
1227 p = write_header_string (p, os);
1229 #if defined (HAVE_SYS_ZLIB)
1230 if (profiler->gzfile) {
1231 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1235 fwrite (hbuf, p - hbuf, 1, profiler->file);
1236 fflush (profiler->file);
1243 * Must be called with the reader lock held if thread is the current thread, or
1244 * the exclusive lock if thread is a different thread. However, if thread is
1245 * the current thread, and init_thread () was called with add_to_lls = FALSE,
1246 * then no locking is necessary.
1249 send_buffer (MonoProfilerThread *thread)
1251 WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1252 entry->methods = thread->methods;
1253 entry->buffer = thread->buffer;
1255 mono_lock_free_queue_node_init (&entry->node, FALSE);
1257 mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1258 mono_os_sem_post (&thread->profiler->writer_queue_sem);
1262 free_thread (gpointer p)
1264 MonoProfilerThread *thread = p;
1266 if (!thread->ended) {
1268 * The thread is being cleaned up by the main thread during
1269 * shutdown. This typically happens for internal runtime
1270 * threads. We need to synthesize a thread end event.
1273 InterlockedIncrement (&thread_ends_ctr);
1275 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1276 LogBuffer *buf = ensure_logbuf_unsafe (thread,
1277 EVENT_SIZE /* event */ +
1278 BYTE_SIZE /* type */ +
1279 LEB128_SIZE /* tid */
1282 emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1283 emit_byte (buf, TYPE_THREAD);
1284 emit_ptr (buf, (void *) thread->node.key);
1288 send_buffer (thread);
1294 remove_thread (MonoProfilerThread *thread)
1296 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1298 if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1299 mono_thread_hazardous_try_free (thread, free_thread);
1301 clear_hazard_pointers (hp);
1305 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1311 dump_buffer (profiler, buf->next);
1313 if (buf->cursor - buf->buf) {
1314 p = write_int32 (p, BUF_ID);
1315 p = write_int32 (p, buf->cursor - buf->buf);
1316 p = write_int64 (p, buf->time_base);
1317 p = write_int64 (p, buf->ptr_base);
1318 p = write_int64 (p, buf->obj_base);
1319 p = write_int64 (p, buf->thread_id);
1320 p = write_int64 (p, buf->method_base);
1322 #if defined (HAVE_SYS_ZLIB)
1323 if (profiler->gzfile) {
1324 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1325 gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1329 fwrite (hbuf, p - hbuf, 1, profiler->file);
1330 fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1331 fflush (profiler->file);
1335 free_buffer (buf, buf->size);
1339 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1341 for (LogBuffer *iter = buf; iter; iter = iter->next)
1342 iter->thread_id = 0;
1344 dump_buffer (profiler, buf);
1347 // Only valid if init_thread () was called with add_to_lls = FALSE.
1349 send_log_unsafe (gboolean if_needed)
1351 MonoProfilerThread *thread = PROF_TLS_GET ();
1353 if (!if_needed || (if_needed && thread->buffer->next)) {
1354 if (!thread->attached)
1355 for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1356 iter->thread_id = 0;
1358 send_buffer (thread);
1359 init_buffer_state (thread);
1363 // Assumes that the exclusive lock is held.
1365 sync_point_flush (void)
1367 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1369 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1370 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1372 send_buffer (thread);
1373 init_buffer_state (thread);
1374 } MONO_LLS_FOREACH_SAFE_END
1377 // Assumes that the exclusive lock is held.
1379 sync_point_mark (MonoProfilerSyncPointType type)
1381 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1383 ENTER_LOG (&sync_points_ctr, logbuffer,
1384 EVENT_SIZE /* event */ +
1385 LEB128_SIZE /* type */
1388 emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1389 emit_byte (logbuffer, type);
1391 EXIT_LOG_EXPLICIT (NO_SEND);
1393 send_log_unsafe (FALSE);
1396 // Assumes that the exclusive lock is held.
1398 sync_point (MonoProfilerSyncPointType type)
1400 sync_point_flush ();
1401 sync_point_mark (type);
1405 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1407 /* account for object alignment in the heap */
1411 ENTER_LOG (&heap_objects_ctr, logbuffer,
1412 EVENT_SIZE /* event */ +
1413 LEB128_SIZE /* obj */ +
1414 LEB128_SIZE /* klass */ +
1415 LEB128_SIZE /* size */ +
1416 LEB128_SIZE /* num */ +
1418 LEB128_SIZE /* offset */ +
1419 LEB128_SIZE /* ref */
1423 emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1424 emit_obj (logbuffer, obj);
1425 emit_ptr (logbuffer, klass);
1426 emit_value (logbuffer, size);
1427 emit_value (logbuffer, num);
1429 uintptr_t last_offset = 0;
1431 for (int i = 0; i < num; ++i) {
1432 emit_value (logbuffer, offsets [i] - last_offset);
1433 last_offset = offsets [i];
1434 emit_obj (logbuffer, refs [i]);
1437 EXIT_LOG_EXPLICIT (DO_SEND);
1442 static unsigned int hs_mode_ms = 0;
1443 static unsigned int hs_mode_gc = 0;
1444 static unsigned int hs_mode_ondemand = 0;
1445 static unsigned int gc_count = 0;
1446 static uint64_t last_hs_time = 0;
1447 static gboolean do_heap_walk = FALSE;
1448 static gboolean ignore_heap_events;
1451 gc_roots (MonoProfiler *prof, MonoObject *const *objects, const MonoProfilerGCRootType *root_types, const uintptr_t *extra_info, uint64_t num)
1453 if (ignore_heap_events)
1456 ENTER_LOG (&heap_roots_ctr, logbuffer,
1457 EVENT_SIZE /* event */ +
1458 LEB128_SIZE /* num */ +
1459 LEB128_SIZE /* collections */ +
1461 LEB128_SIZE /* object */ +
1462 LEB128_SIZE /* root type */ +
1463 LEB128_SIZE /* extra info */
1467 emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1468 emit_value (logbuffer, num);
1469 emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1471 for (int i = 0; i < num; ++i) {
1472 emit_obj (logbuffer, objects [i]);
1473 emit_byte (logbuffer, root_types [i]);
1474 emit_value (logbuffer, extra_info [i]);
1477 EXIT_LOG_EXPLICIT (DO_SEND);
1482 trigger_on_demand_heapshot (void)
1484 if (heapshot_requested)
1485 mono_gc_collect (mono_gc_max_generation ());
1488 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1491 gc_event (MonoProfiler *profiler, MonoProfilerGCEvent ev, uint32_t generation)
1493 if (ev == MONO_GC_EVENT_START) {
1494 uint64_t now = current_time ();
1496 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1497 do_heap_walk = TRUE;
1498 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1499 do_heap_walk = TRUE;
1500 else if (hs_mode_ondemand)
1501 do_heap_walk = heapshot_requested;
1502 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1503 do_heap_walk = TRUE;
1505 //If using heapshot, ignore events for collections we don't care
1506 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1507 // Ignore events generated during the collection itself (IE GC ROOTS)
1508 ignore_heap_events = !do_heap_walk;
1513 if (ENABLED (PROFLOG_GC_EVENTS)) {
1514 ENTER_LOG (&gc_events_ctr, logbuffer,
1515 EVENT_SIZE /* event */ +
1516 BYTE_SIZE /* gc event */ +
1517 BYTE_SIZE /* generation */
1520 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1521 emit_byte (logbuffer, ev);
1522 emit_byte (logbuffer, generation);
1524 EXIT_LOG_EXPLICIT (NO_SEND);
1528 case MONO_GC_EVENT_START:
1529 if (generation == mono_gc_max_generation ())
1533 case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1535 * Ensure that no thread can be in the middle of writing to
1536 * a buffer when the world stops...
1538 buffer_lock_excl ();
1540 case MONO_GC_EVENT_POST_STOP_WORLD:
1542 * ... So that we now have a consistent view of all buffers.
1543 * This allows us to flush them. We need to do this because
1544 * they may contain object allocation events that need to be
1545 * committed to the log file before any object move events
1546 * that will be produced during this GC.
1548 if (ENABLED (ALL_GC_EVENTS_MASK))
1549 sync_point (SYNC_POINT_WORLD_STOP);
1552 * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1553 * Right now, that's the case for GC Moves, GC Roots or heapshots.
1555 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1556 ENTER_LOG (&heap_starts_ctr, logbuffer,
1557 EVENT_SIZE /* event */
1560 emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1562 EXIT_LOG_EXPLICIT (DO_SEND);
1566 case MONO_GC_EVENT_PRE_START_WORLD:
1567 if (do_heap_shot && do_heap_walk)
1568 mono_gc_walk_heap (0, gc_reference, NULL);
1570 /* Matching HEAP_END to the HEAP_START from above */
1571 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1572 ENTER_LOG (&heap_ends_ctr, logbuffer,
1573 EVENT_SIZE /* event */
1576 emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1578 EXIT_LOG_EXPLICIT (DO_SEND);
1581 if (do_heap_shot && do_heap_walk) {
1582 do_heap_walk = FALSE;
1583 heapshot_requested = 0;
1584 last_hs_time = current_time ();
1588 * Similarly, we must now make sure that any object moves
1589 * written to the GC thread's buffer are flushed. Otherwise,
1590 * object allocation events for certain addresses could come
1591 * after the move events that made those addresses available.
1593 if (ENABLED (ALL_GC_EVENTS_MASK))
1594 sync_point_mark (SYNC_POINT_WORLD_START);
1596 case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1598 * Finally, it is safe to allow other threads to write to
1599 * their buffers again.
1601 buffer_unlock_excl ();
1609 gc_resize (MonoProfiler *profiler, uintptr_t new_size)
1611 ENTER_LOG (&gc_resizes_ctr, logbuffer,
1612 EVENT_SIZE /* event */ +
1613 LEB128_SIZE /* new size */
1616 emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1617 emit_value (logbuffer, new_size);
1619 EXIT_LOG_EXPLICIT (DO_SEND);
1624 MonoMethod* methods [MAX_FRAMES];
1625 int32_t il_offsets [MAX_FRAMES];
1626 int32_t native_offsets [MAX_FRAMES];
1629 static int num_frames = MAX_FRAMES;
1632 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1634 FrameData *frame = (FrameData *)data;
1635 if (method && frame->count < num_frames) {
1636 frame->il_offsets [frame->count] = il_offset;
1637 frame->native_offsets [frame->count] = native_offset;
1638 frame->methods [frame->count++] = method;
1640 return frame->count == num_frames;
1644 * a note about stack walks: they can cause more profiler events to fire,
1645 * so we need to make sure they don't happen after we started emitting an
1646 * event, hence the collect_bt/emit_bt split.
1649 collect_bt (FrameData *data)
1652 mono_stack_walk_no_il (walk_stack, data);
1656 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1658 emit_value (logbuffer, data->count);
1661 emit_method (logbuffer, data->methods [--data->count]);
1665 gc_alloc (MonoProfiler *prof, MonoObject *obj)
1667 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1669 uintptr_t len = mono_object_get_size (obj);
1670 /* account for object alignment in the heap */
1677 ENTER_LOG (&gc_allocs_ctr, logbuffer,
1678 EVENT_SIZE /* event */ +
1679 LEB128_SIZE /* klass */ +
1680 LEB128_SIZE /* obj */ +
1681 LEB128_SIZE /* size */ +
1683 LEB128_SIZE /* count */ +
1685 LEB128_SIZE /* method */
1690 emit_event (logbuffer, do_bt | TYPE_ALLOC);
1691 emit_ptr (logbuffer, mono_object_get_class (obj));
1692 emit_obj (logbuffer, obj);
1693 emit_value (logbuffer, len);
1696 emit_bt (prof, logbuffer, &data);
1702 gc_moves (MonoProfiler *prof, MonoObject *const *objects, uint64_t num)
1704 ENTER_LOG (&gc_moves_ctr, logbuffer,
1705 EVENT_SIZE /* event */ +
1706 LEB128_SIZE /* num */ +
1708 LEB128_SIZE /* object */
1712 emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1713 emit_value (logbuffer, num);
1715 for (int i = 0; i < num; ++i)
1716 emit_obj (logbuffer, objects [i]);
1718 EXIT_LOG_EXPLICIT (DO_SEND);
1722 gc_handle (MonoProfiler *prof, int op, MonoGCHandleType type, uint32_t handle, MonoObject *obj)
1724 int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1730 gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1732 ENTER_LOG (ctr, logbuffer,
1733 EVENT_SIZE /* event */ +
1734 LEB128_SIZE /* type */ +
1735 LEB128_SIZE /* handle */ +
1736 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1737 LEB128_SIZE /* obj */
1740 LEB128_SIZE /* count */ +
1742 LEB128_SIZE /* method */
1747 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1748 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1749 else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1750 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1752 g_assert_not_reached ();
1754 emit_value (logbuffer, type);
1755 emit_value (logbuffer, handle);
1757 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1758 emit_obj (logbuffer, obj);
1761 emit_bt (prof, logbuffer, &data);
1767 gc_handle_created (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type, MonoObject *obj)
1769 gc_handle (prof, MONO_PROFILER_GC_HANDLE_CREATED, type, handle, obj);
1773 gc_handle_deleted (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type)
1775 gc_handle (prof, MONO_PROFILER_GC_HANDLE_DESTROYED, type, handle, NULL);
1779 finalize_begin (MonoProfiler *prof)
1781 ENTER_LOG (&finalize_begins_ctr, buf,
1782 EVENT_SIZE /* event */
1785 emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1791 finalize_end (MonoProfiler *prof)
1793 trigger_on_demand_heapshot ();
1794 if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1795 ENTER_LOG (&finalize_ends_ctr, buf,
1796 EVENT_SIZE /* event */
1799 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1806 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1808 ENTER_LOG (&finalize_object_begins_ctr, buf,
1809 EVENT_SIZE /* event */ +
1810 LEB128_SIZE /* obj */
1813 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1814 emit_obj (buf, obj);
1820 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1822 ENTER_LOG (&finalize_object_ends_ctr, buf,
1823 EVENT_SIZE /* event */ +
1824 LEB128_SIZE /* obj */
1827 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1828 emit_obj (buf, obj);
1834 push_nesting (char *p, MonoClass *klass)
1839 nesting = mono_class_get_nesting_type (klass);
1841 p = push_nesting (p, nesting);
1845 name = mono_class_get_name (klass);
1846 nspace = mono_class_get_namespace (klass);
1849 p += strlen (nspace);
1859 type_name (MonoClass *klass)
1863 push_nesting (buf, klass);
1864 p = (char *) g_malloc (strlen (buf) + 1);
1870 image_loaded (MonoProfiler *prof, MonoImage *image)
1872 const char *name = mono_image_get_filename (image);
1873 int nlen = strlen (name) + 1;
1875 ENTER_LOG (&image_loads_ctr, logbuffer,
1876 EVENT_SIZE /* event */ +
1877 BYTE_SIZE /* type */ +
1878 LEB128_SIZE /* image */ +
1882 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1883 emit_byte (logbuffer, TYPE_IMAGE);
1884 emit_ptr (logbuffer, image);
1885 memcpy (logbuffer->cursor, name, nlen);
1886 logbuffer->cursor += nlen;
1892 image_unloaded (MonoProfiler *prof, MonoImage *image)
1894 const char *name = mono_image_get_filename (image);
1895 int nlen = strlen (name) + 1;
1897 ENTER_LOG (&image_unloads_ctr, logbuffer,
1898 EVENT_SIZE /* event */ +
1899 BYTE_SIZE /* type */ +
1900 LEB128_SIZE /* image */ +
1904 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1905 emit_byte (logbuffer, TYPE_IMAGE);
1906 emit_ptr (logbuffer, image);
1907 memcpy (logbuffer->cursor, name, nlen);
1908 logbuffer->cursor += nlen;
1914 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly)
1916 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1917 int nlen = strlen (name) + 1;
1918 MonoImage *image = mono_assembly_get_image (assembly);
1920 ENTER_LOG (&assembly_loads_ctr, logbuffer,
1921 EVENT_SIZE /* event */ +
1922 BYTE_SIZE /* type */ +
1923 LEB128_SIZE /* assembly */ +
1924 LEB128_SIZE /* image */ +
1928 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1929 emit_byte (logbuffer, TYPE_ASSEMBLY);
1930 emit_ptr (logbuffer, assembly);
1931 emit_ptr (logbuffer, image);
1932 memcpy (logbuffer->cursor, name, nlen);
1933 logbuffer->cursor += nlen;
1941 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1943 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1944 int nlen = strlen (name) + 1;
1945 MonoImage *image = mono_assembly_get_image (assembly);
1947 ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1948 EVENT_SIZE /* event */ +
1949 BYTE_SIZE /* type */ +
1950 LEB128_SIZE /* assembly */ +
1951 LEB128_SIZE /* image */ +
1955 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1956 emit_byte (logbuffer, TYPE_ASSEMBLY);
1957 emit_ptr (logbuffer, assembly);
1958 emit_ptr (logbuffer, image);
1959 memcpy (logbuffer->cursor, name, nlen);
1960 logbuffer->cursor += nlen;
1968 class_loaded (MonoProfiler *prof, MonoClass *klass)
1972 if (InterlockedRead (&runtime_inited))
1973 name = mono_type_get_name (mono_class_get_type (klass));
1975 name = type_name (klass);
1977 int nlen = strlen (name) + 1;
1978 MonoImage *image = mono_class_get_image (klass);
1980 ENTER_LOG (&class_loads_ctr, logbuffer,
1981 EVENT_SIZE /* event */ +
1982 BYTE_SIZE /* type */ +
1983 LEB128_SIZE /* klass */ +
1984 LEB128_SIZE /* image */ +
1988 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1989 emit_byte (logbuffer, TYPE_CLASS);
1990 emit_ptr (logbuffer, klass);
1991 emit_ptr (logbuffer, image);
1992 memcpy (logbuffer->cursor, name, nlen);
1993 logbuffer->cursor += nlen;
2004 method_enter (MonoProfiler *prof, MonoMethod *method)
2006 if (get_thread ()->call_depth++ <= max_call_depth) {
2007 ENTER_LOG (&method_entries_ctr, logbuffer,
2008 EVENT_SIZE /* event */ +
2009 LEB128_SIZE /* method */
2012 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
2013 emit_method (logbuffer, method);
2020 method_leave (MonoProfiler *prof, MonoMethod *method)
2022 if (--get_thread ()->call_depth <= max_call_depth) {
2023 ENTER_LOG (&method_exits_ctr, logbuffer,
2024 EVENT_SIZE /* event */ +
2025 LEB128_SIZE /* method */
2028 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2029 emit_method (logbuffer, method);
2036 method_exc_leave (MonoProfiler *prof, MonoMethod *method, MonoObject *exc)
2038 if (!nocalls && --get_thread ()->call_depth <= max_call_depth) {
2039 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2040 EVENT_SIZE /* event */ +
2041 LEB128_SIZE /* method */
2044 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2045 emit_method (logbuffer, method);
2051 static MonoProfilerCallInstrumentationFlags
2052 method_filter (MonoProfiler *prof, MonoMethod *method)
2054 return MONO_PROFILER_CALL_INSTRUMENTATION_PROLOGUE | MONO_PROFILER_CALL_INSTRUMENTATION_EPILOGUE;
2058 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji)
2062 register_method_local (method, ji);
2068 code_buffer_new (MonoProfiler *prof, const mono_byte *buffer, uint64_t size, MonoProfilerCodeBufferType type, const void *data)
2073 if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2074 name = (const char *) data;
2075 nlen = strlen (name) + 1;
2081 ENTER_LOG (&code_buffers_ctr, logbuffer,
2082 EVENT_SIZE /* event */ +
2083 BYTE_SIZE /* type */ +
2084 LEB128_SIZE /* buffer */ +
2085 LEB128_SIZE /* size */ +
2091 emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2092 emit_byte (logbuffer, type);
2093 emit_ptr (logbuffer, buffer);
2094 emit_value (logbuffer, size);
2097 memcpy (logbuffer->cursor, name, nlen);
2098 logbuffer->cursor += nlen;
2105 throw_exc (MonoProfiler *prof, MonoObject *object)
2107 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2113 ENTER_LOG (&exception_throws_ctr, logbuffer,
2114 EVENT_SIZE /* event */ +
2115 LEB128_SIZE /* object */ +
2117 LEB128_SIZE /* count */ +
2119 LEB128_SIZE /* method */
2124 emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2125 emit_obj (logbuffer, object);
2128 emit_bt (prof, logbuffer, &data);
2134 clause_exc (MonoProfiler *prof, MonoMethod *method, uint32_t clause_num, MonoExceptionEnum clause_type, MonoObject *exc)
2136 ENTER_LOG (&exception_clauses_ctr, logbuffer,
2137 EVENT_SIZE /* event */ +
2138 BYTE_SIZE /* clause type */ +
2139 LEB128_SIZE /* clause num */ +
2140 LEB128_SIZE /* method */
2143 emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2144 emit_byte (logbuffer, clause_type);
2145 emit_value (logbuffer, clause_num);
2146 emit_method (logbuffer, method);
2147 emit_obj (logbuffer, exc);
2153 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2155 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2161 ENTER_LOG (&monitor_events_ctr, logbuffer,
2162 EVENT_SIZE /* event */ +
2163 BYTE_SIZE /* ev */ +
2164 LEB128_SIZE /* object */ +
2166 LEB128_SIZE /* count */ +
2168 LEB128_SIZE /* method */
2173 emit_event (logbuffer, do_bt | TYPE_MONITOR);
2174 emit_byte (logbuffer, ev);
2175 emit_obj (logbuffer, object);
2178 emit_bt (profiler, logbuffer, &data);
2184 monitor_contention (MonoProfiler *prof, MonoObject *object)
2186 monitor_event (prof, object, MONO_PROFILER_MONITOR_CONTENTION);
2190 monitor_acquired (MonoProfiler *prof, MonoObject *object)
2192 monitor_event (prof, object, MONO_PROFILER_MONITOR_DONE);
2196 monitor_failed (MonoProfiler *prof, MonoObject *object)
2198 monitor_event (prof, object, MONO_PROFILER_MONITOR_FAIL);
2202 thread_start (MonoProfiler *prof, uintptr_t tid)
2204 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2205 ENTER_LOG (&thread_starts_ctr, logbuffer,
2206 EVENT_SIZE /* event */ +
2207 BYTE_SIZE /* type */ +
2208 LEB128_SIZE /* tid */
2211 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2212 emit_byte (logbuffer, TYPE_THREAD);
2213 emit_ptr (logbuffer, (void*) tid);
2220 thread_end (MonoProfiler *prof, uintptr_t tid)
2222 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2223 ENTER_LOG (&thread_ends_ctr, logbuffer,
2224 EVENT_SIZE /* event */ +
2225 BYTE_SIZE /* type */ +
2226 LEB128_SIZE /* tid */
2229 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2230 emit_byte (logbuffer, TYPE_THREAD);
2231 emit_ptr (logbuffer, (void*) tid);
2233 EXIT_LOG_EXPLICIT (NO_SEND);
2236 MonoProfilerThread *thread = get_thread ();
2238 thread->ended = TRUE;
2239 remove_thread (thread);
2241 PROF_TLS_SET (NULL);
2245 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2247 int len = strlen (name) + 1;
2249 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2250 ENTER_LOG (&thread_names_ctr, logbuffer,
2251 EVENT_SIZE /* event */ +
2252 BYTE_SIZE /* type */ +
2253 LEB128_SIZE /* tid */ +
2257 emit_event (logbuffer, TYPE_METADATA);
2258 emit_byte (logbuffer, TYPE_THREAD);
2259 emit_ptr (logbuffer, (void*)tid);
2260 memcpy (logbuffer->cursor, name, len);
2261 logbuffer->cursor += len;
2268 domain_loaded (MonoProfiler *prof, MonoDomain *domain)
2270 ENTER_LOG (&domain_loads_ctr, logbuffer,
2271 EVENT_SIZE /* event */ +
2272 BYTE_SIZE /* type */ +
2273 LEB128_SIZE /* domain id */
2276 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2277 emit_byte (logbuffer, TYPE_DOMAIN);
2278 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2284 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2286 ENTER_LOG (&domain_unloads_ctr, logbuffer,
2287 EVENT_SIZE /* event */ +
2288 BYTE_SIZE /* type */ +
2289 LEB128_SIZE /* domain id */
2292 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2293 emit_byte (logbuffer, TYPE_DOMAIN);
2294 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2300 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2302 int nlen = strlen (name) + 1;
2304 ENTER_LOG (&domain_names_ctr, logbuffer,
2305 EVENT_SIZE /* event */ +
2306 BYTE_SIZE /* type */ +
2307 LEB128_SIZE /* domain id */ +
2311 emit_event (logbuffer, TYPE_METADATA);
2312 emit_byte (logbuffer, TYPE_DOMAIN);
2313 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2314 memcpy (logbuffer->cursor, name, nlen);
2315 logbuffer->cursor += nlen;
2321 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2323 ENTER_LOG (&context_loads_ctr, logbuffer,
2324 EVENT_SIZE /* event */ +
2325 BYTE_SIZE /* type */ +
2326 LEB128_SIZE /* context id */ +
2327 LEB128_SIZE /* domain id */
2330 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2331 emit_byte (logbuffer, TYPE_CONTEXT);
2332 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2333 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2339 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2341 ENTER_LOG (&context_unloads_ctr, logbuffer,
2342 EVENT_SIZE /* event */ +
2343 BYTE_SIZE /* type */ +
2344 LEB128_SIZE /* context id */ +
2345 LEB128_SIZE /* domain id */
2348 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2349 emit_byte (logbuffer, TYPE_CONTEXT);
2350 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2351 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2364 MonoLockFreeQueueNode node;
2370 AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2374 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2376 SampleHit *sample = (SampleHit *) data;
2378 if (sample->count < num_frames) {
2379 int i = sample->count;
2381 sample->frames [i].method = method;
2382 sample->frames [i].domain = domain;
2383 sample->frames [i].base_address = base_address;
2384 sample->frames [i].offset = offset;
2389 return sample->count == num_frames;
2392 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2393 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2396 enqueue_sample_hit (gpointer p)
2398 SampleHit *sample = p;
2400 mono_lock_free_queue_node_unpoison (&sample->node);
2401 mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2402 mono_os_sem_post (&sample->prof->dumper_queue_sem);
2406 mono_sample_hit (MonoProfiler *profiler, const mono_byte *ip, const void *context)
2409 * Please note: We rely on the runtime loading the profiler with
2410 * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2411 * this function (and its siblings) are resolved when the profiler is
2412 * loaded. Otherwise, we would potentially invoke the dynamic linker when
2413 * invoking runtime functions, which is not async-signal-safe.
2416 if (InterlockedRead (&in_shutdown))
2419 SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2423 * If we're out of reusable sample events and we're not allowed to
2424 * allocate more, we have no choice but to drop the event.
2426 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2429 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2430 sample->prof = profiler;
2431 mono_lock_free_queue_node_init (&sample->node, TRUE);
2433 InterlockedIncrement (&sample_allocations_ctr);
2437 mono_stack_walk_async_safe (&async_walk_stack, (void *) context, sample);
2439 sample->time = current_time ();
2440 sample->tid = thread_id ();
2443 mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2446 static uintptr_t *code_pages = 0;
2447 static int num_code_pages = 0;
2448 static int size_code_pages = 0;
2449 #define CPAGE_SHIFT (9)
2450 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2451 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2452 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2455 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2458 uintptr_t start_pos;
2459 start_pos = (page >> CPAGE_SHIFT) % hsize;
2462 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2464 } else if (!hash [i]) {
2471 } while (i != start_pos);
2472 g_assert_not_reached ();
2477 add_code_pointer (uintptr_t ip)
2480 if (num_code_pages * 2 >= size_code_pages) {
2482 uintptr_t old_size = size_code_pages;
2483 size_code_pages *= 2;
2484 if (size_code_pages == 0)
2485 size_code_pages = 16;
2486 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2487 for (i = 0; i < old_size; ++i) {
2489 add_code_page (n, size_code_pages, code_pages [i]);
2492 g_free (code_pages);
2495 num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2498 /* ELF code crashes on some systems. */
2499 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2502 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2504 int len = strlen (filename) + 1;
2506 ENTER_LOG (&sample_ubins_ctr, logbuffer,
2507 EVENT_SIZE /* event */ +
2508 LEB128_SIZE /* load address */ +
2509 LEB128_SIZE /* offset */ +
2510 LEB128_SIZE /* size */ +
2511 nlen /* file name */
2514 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2515 emit_ptr (logbuffer, load_addr);
2516 emit_uvalue (logbuffer, offset);
2517 emit_uvalue (logbuffer, size);
2518 memcpy (logbuffer->cursor, filename, len);
2519 logbuffer->cursor += len;
2521 EXIT_LOG_EXPLICIT (DO_SEND);
2526 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2528 int len = strlen (name) + 1;
2530 ENTER_LOG (&sample_usyms_ctr, logbuffer,
2531 EVENT_SIZE /* event */ +
2532 LEB128_SIZE /* value */ +
2533 LEB128_SIZE /* size */ +
2537 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2538 emit_ptr (logbuffer, (void*)value);
2539 emit_value (logbuffer, size);
2540 memcpy (logbuffer->cursor, name, len);
2541 logbuffer->cursor += len;
2543 EXIT_LOG_EXPLICIT (DO_SEND);
2546 /* ELF code crashes on some systems. */
2547 //#if defined(ELFMAG0)
2550 #if SIZEOF_VOID_P == 4
2551 #define ELF_WSIZE 32
2553 #define ELF_WSIZE 64
2556 #define ElfW(type) _ElfW (Elf, ELF_WSIZE, type)
2557 #define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
2558 #define _ElfW_1(e,w,t) e##w##t
2562 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2565 for (i = 0; i < num_symbols; ++i) {
2567 sym = strtab + symbols [i].st_name;
2568 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2570 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2575 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2582 ElfW(Shdr) *sheader;
2583 ElfW(Shdr) *shstrtabh;
2584 ElfW(Shdr) *symtabh = NULL;
2585 ElfW(Shdr) *strtabh = NULL;
2586 ElfW(Sym) *symbols = NULL;
2590 fd = open (filename, O_RDONLY);
2593 if (fstat (fd, &statb) != 0) {
2597 file_size = statb.st_size;
2598 data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2600 if (data == MAP_FAILED)
2603 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2604 header->e_ident [EI_MAG1] != ELFMAG1 ||
2605 header->e_ident [EI_MAG2] != ELFMAG2 ||
2606 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2607 munmap (data, file_size);
2610 sheader = (void*)((char*)data + header->e_shoff);
2611 shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2612 strtab = (const char*)data + shstrtabh->sh_offset;
2613 for (i = 0; i < header->e_shnum; ++i) {
2614 if (sheader->sh_type == SHT_SYMTAB) {
2616 strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2619 sheader = (void*)((char*)sheader + header->e_shentsize);
2621 if (!symtabh || !strtabh) {
2622 munmap (data, file_size);
2625 strtab = (const char*)data + strtabh->sh_offset;
2626 num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2627 symbols = (void*)((char*)data + symtabh->sh_offset);
2628 dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2629 munmap (data, file_size);
2634 /* ELF code crashes on some systems. */
2635 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2638 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2640 MonoProfiler *prof = data;
2642 const char *filename;
2644 char *a = (void*)info->dlpi_addr;
2646 ElfW(Dyn) *dyn = NULL;
2647 ElfW(Sym) *symtab = NULL;
2648 ElfW(Word) *hash_table = NULL;
2649 ElfW(Ehdr) *header = NULL;
2650 const char* strtab = NULL;
2651 for (obj = prof->binary_objects; obj; obj = obj->next) {
2655 filename = info->dlpi_name;
2658 if (!info->dlpi_addr && !filename [0]) {
2659 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2665 obj = g_calloc (sizeof (BinaryObject), 1);
2666 obj->addr = (void*)info->dlpi_addr;
2667 obj->name = pstrdup (filename);
2668 obj->next = prof->binary_objects;
2669 prof->binary_objects = obj;
2671 for (i = 0; i < info->dlpi_phnum; ++i) {
2672 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2673 header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2674 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2675 header->e_ident [EI_MAG1] != ELFMAG1 ||
2676 header->e_ident [EI_MAG2] != ELFMAG2 ||
2677 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2680 dump_ubin (prof, filename, info->dlpi_addr + info->dlpi_phdr[i].p_vaddr, info->dlpi_phdr[i].p_offset, info->dlpi_phdr[i].p_memsz);
2681 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2682 dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2685 if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2687 if (!info->dlpi_name || !info->dlpi_name[0])
2691 for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2692 if (dyn [i].d_tag == DT_SYMTAB) {
2693 symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2694 } else if (dyn [i].d_tag == DT_HASH) {
2695 hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2696 } else if (dyn [i].d_tag == DT_STRTAB) {
2697 strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2702 num_sym = hash_table [1];
2703 dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2708 load_binaries (MonoProfiler *prof)
2710 dl_iterate_phdr (elf_dl_callback, prof);
2715 load_binaries (MonoProfiler *prof)
2722 symbol_for (uintptr_t code)
2725 void *ip = (void*)code;
2727 if (dladdr (ip, &di)) {
2729 return di.dli_sname;
2732 names = backtrace_symbols (&ip, 1);
2734 const char* p = names [0];
2745 dump_unmanaged_coderefs (MonoProfiler *prof)
2748 const char* last_symbol;
2749 uintptr_t addr, page_end;
2751 if (load_binaries (prof))
2753 for (i = 0; i < size_code_pages; ++i) {
2755 if (!code_pages [i] || code_pages [i] & 1)
2758 addr = CPAGE_ADDR (code_pages [i]);
2759 page_end = addr + CPAGE_SIZE;
2760 code_pages [i] |= 1;
2761 /* we dump the symbols for the whole page */
2762 for (; addr < page_end; addr += 16) {
2763 sym = symbol_for (addr);
2764 if (sym && sym == last_symbol)
2769 dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2774 typedef struct MonoCounterAgent {
2775 MonoCounter *counter;
2776 // MonoCounterAgent specific data :
2781 struct MonoCounterAgent *next;
2784 static MonoCounterAgent* counters;
2785 static int counters_index = 1;
2786 static mono_mutex_t counters_mutex;
2789 counters_add_agent (MonoCounter *counter)
2791 if (InterlockedRead (&in_shutdown))
2794 MonoCounterAgent *agent, *item;
2796 mono_os_mutex_lock (&counters_mutex);
2798 for (agent = counters; agent; agent = agent->next) {
2799 if (agent->counter == counter) {
2800 agent->value_size = 0;
2802 g_free (agent->value);
2803 agent->value = NULL;
2809 agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2810 agent->counter = counter;
2811 agent->value = NULL;
2812 agent->value_size = 0;
2813 agent->index = counters_index++;
2827 mono_os_mutex_unlock (&counters_mutex);
2831 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2833 counters_add_agent (counter);
2838 counters_init (MonoProfiler *profiler)
2840 mono_os_mutex_init (&counters_mutex);
2842 mono_counters_on_register (&counters_add_agent);
2843 mono_counters_foreach (counters_init_foreach_callback, NULL);
2847 counters_emit (MonoProfiler *profiler)
2849 MonoCounterAgent *agent;
2852 EVENT_SIZE /* event */ +
2853 LEB128_SIZE /* len */
2856 mono_os_mutex_lock (&counters_mutex);
2858 for (agent = counters; agent; agent = agent->next) {
2863 LEB128_SIZE /* section */ +
2864 strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2865 BYTE_SIZE /* type */ +
2866 BYTE_SIZE /* unit */ +
2867 BYTE_SIZE /* variance */ +
2868 LEB128_SIZE /* index */
2877 ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2879 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2880 emit_value (logbuffer, len);
2882 for (agent = counters; agent; agent = agent->next) {
2888 name = mono_counter_get_name (agent->counter);
2889 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2890 emit_string (logbuffer, name, strlen (name) + 1);
2891 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2892 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2893 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2894 emit_value (logbuffer, agent->index);
2899 EXIT_LOG_EXPLICIT (DO_SEND);
2902 mono_os_mutex_unlock (&counters_mutex);
2906 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2908 MonoCounterAgent *agent;
2909 MonoCounter *counter;
2915 counters_emit (profiler);
2918 buffer = g_calloc (1, buffer_size);
2920 mono_os_mutex_lock (&counters_mutex);
2923 EVENT_SIZE /* event */
2926 for (agent = counters; agent; agent = agent->next) {
2928 LEB128_SIZE /* index */ +
2929 BYTE_SIZE /* type */ +
2930 mono_counter_get_size (agent->counter) /* value */
2935 LEB128_SIZE /* stop marker */
2938 ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2940 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2942 for (agent = counters; agent; agent = agent->next) {
2945 counter = agent->counter;
2947 size = mono_counter_get_size (counter);
2949 if (size > buffer_size) {
2951 buffer = g_realloc (buffer, buffer_size);
2954 memset (buffer, 0, buffer_size);
2956 g_assert (mono_counters_sample (counter, buffer, size));
2958 type = mono_counter_get_type (counter);
2960 if (!agent->value) {
2961 agent->value = g_calloc (1, size);
2962 agent->value_size = size;
2964 if (type == MONO_COUNTER_STRING) {
2965 if (strcmp (agent->value, buffer) == 0)
2968 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2973 emit_uvalue (logbuffer, agent->index);
2974 emit_byte (logbuffer, type);
2976 case MONO_COUNTER_INT:
2977 #if SIZEOF_VOID_P == 4
2978 case MONO_COUNTER_WORD:
2980 emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2982 case MONO_COUNTER_UINT:
2983 emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2985 case MONO_COUNTER_TIME_INTERVAL:
2986 case MONO_COUNTER_LONG:
2987 #if SIZEOF_VOID_P == 8
2988 case MONO_COUNTER_WORD:
2990 emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2992 case MONO_COUNTER_ULONG:
2993 emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2995 case MONO_COUNTER_DOUBLE:
2996 emit_double (logbuffer, *(double*)buffer);
2998 case MONO_COUNTER_STRING:
3000 emit_byte (logbuffer, 0);
3002 emit_byte (logbuffer, 1);
3003 emit_string (logbuffer, (char*)buffer, size);
3007 g_assert_not_reached ();
3010 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
3011 agent->value = g_realloc (agent->value, size);
3012 agent->value_size = size;
3016 memcpy (agent->value, buffer, size);
3020 emit_value (logbuffer, 0);
3022 EXIT_LOG_EXPLICIT (DO_SEND);
3024 mono_os_mutex_unlock (&counters_mutex);
3027 typedef struct _PerfCounterAgent PerfCounterAgent;
3028 struct _PerfCounterAgent {
3029 PerfCounterAgent *next;
3031 char *category_name;
3040 static PerfCounterAgent *perfcounters = NULL;
3043 perfcounters_emit (MonoProfiler *profiler)
3045 PerfCounterAgent *pcagent;
3048 EVENT_SIZE /* event */ +
3049 LEB128_SIZE /* len */
3052 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3053 if (pcagent->emitted)
3057 LEB128_SIZE /* section */ +
3058 strlen (pcagent->category_name) + 1 /* category name */ +
3059 strlen (pcagent->name) + 1 /* name */ +
3060 BYTE_SIZE /* type */ +
3061 BYTE_SIZE /* unit */ +
3062 BYTE_SIZE /* variance */ +
3063 LEB128_SIZE /* index */
3072 ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3074 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3075 emit_value (logbuffer, len);
3077 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3078 if (pcagent->emitted)
3081 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3082 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3083 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3084 emit_byte (logbuffer, MONO_COUNTER_LONG);
3085 emit_byte (logbuffer, MONO_COUNTER_RAW);
3086 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3087 emit_value (logbuffer, pcagent->index);
3089 pcagent->emitted = 1;
3092 EXIT_LOG_EXPLICIT (DO_SEND);
3096 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3098 PerfCounterAgent *pcagent;
3100 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3101 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3103 if (pcagent->value == value)
3106 pcagent->value = value;
3107 pcagent->updated = 1;
3108 pcagent->deleted = 0;
3112 pcagent = g_new0 (PerfCounterAgent, 1);
3113 pcagent->next = perfcounters;
3114 pcagent->index = counters_index++;
3115 pcagent->category_name = g_strdup (category_name);
3116 pcagent->name = g_strdup (name);
3117 pcagent->type = (int) type;
3118 pcagent->value = value;
3119 pcagent->emitted = 0;
3120 pcagent->updated = 1;
3121 pcagent->deleted = 0;
3123 perfcounters = pcagent;
3129 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3131 PerfCounterAgent *pcagent;
3135 mono_os_mutex_lock (&counters_mutex);
3137 /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3138 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3139 pcagent->deleted = 1;
3141 mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3143 perfcounters_emit (profiler);
3146 EVENT_SIZE /* event */
3149 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3150 if (pcagent->deleted || !pcagent->updated)
3154 LEB128_SIZE /* index */ +
3155 BYTE_SIZE /* type */ +
3156 LEB128_SIZE /* value */
3166 LEB128_SIZE /* stop marker */
3169 ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3171 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3173 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3174 if (pcagent->deleted || !pcagent->updated)
3176 emit_uvalue (logbuffer, pcagent->index);
3177 emit_byte (logbuffer, MONO_COUNTER_LONG);
3178 emit_svalue (logbuffer, pcagent->value);
3180 pcagent->updated = 0;
3183 emit_value (logbuffer, 0);
3185 EXIT_LOG_EXPLICIT (DO_SEND);
3188 mono_os_mutex_unlock (&counters_mutex);
3192 counters_and_perfcounters_sample (MonoProfiler *prof)
3194 uint64_t now = current_time ();
3196 counters_sample (prof, now);
3197 perfcounters_sample (prof, now);
3200 static mono_mutex_t coverage_mutex;
3201 static MonoConcurrentHashTable *coverage_methods = NULL;
3202 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3203 static MonoConcurrentHashTable *coverage_classes = NULL;
3205 static MonoConcurrentHashTable *filtered_classes = NULL;
3206 static MonoConcurrentHashTable *image_to_methods = NULL;
3207 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3208 static gboolean coverage_initialized = FALSE;
3210 static GPtrArray *coverage_data = NULL;
3211 static int previous_offset = 0;
3214 MonoLockFreeQueueNode node;
3227 free_coverage_entry (gpointer data, gpointer userdata)
3229 CoverageEntry *entry = (CoverageEntry *)data;
3230 g_free (entry->filename);
3235 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfilerCoverageData *entry)
3237 int offset = entry->il_offset - previous_offset;
3238 CoverageEntry *e = g_new (CoverageEntry, 1);
3240 previous_offset = entry->il_offset;
3243 e->counter = entry->counter;
3244 e->filename = g_strdup(entry->file_name ? entry->file_name : "");
3245 e->line = entry->line;
3246 e->column = entry->column;
3248 g_ptr_array_add (coverage_data, e);
3252 parse_generic_type_names(char *name)
3254 char *new_name, *ret;
3255 int within_generic_declaration = 0, generic_members = 1;
3257 if (name == NULL || *name == '\0')
3258 return g_strdup ("");
3260 if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3266 within_generic_declaration = 1;
3270 within_generic_declaration = 0;
3272 if (*(name - 1) != '<') {
3274 *new_name++ = '0' + generic_members;
3276 memcpy (new_name, "<>", 8);
3280 generic_members = 0;
3288 if (!within_generic_declaration)
3289 *new_name++ = *name;
3298 static int method_id;
3300 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3302 MonoMethod *method = (MonoMethod *)value;
3303 MonoProfiler *prof = (MonoProfiler *)userdata;
3307 const char *image_name, *method_name, *sig, *first_filename;
3310 previous_offset = 0;
3311 coverage_data = g_ptr_array_new ();
3313 mono_profiler_get_coverage_data (prof->handle, method, obtain_coverage_for_method);
3315 klass = mono_method_get_class (method);
3316 image = mono_class_get_image (klass);
3317 image_name = mono_image_get_name (image);
3319 sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3320 class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3321 method_name = mono_method_get_name (method);
3323 if (coverage_data->len != 0) {
3324 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3325 first_filename = entry->filename ? entry->filename : "";
3327 first_filename = "";
3329 image_name = image_name ? image_name : "";
3330 sig = sig ? sig : "";
3331 method_name = method_name ? method_name : "";
3333 ENTER_LOG (&coverage_methods_ctr, logbuffer,
3334 EVENT_SIZE /* event */ +
3335 strlen (image_name) + 1 /* image name */ +
3336 strlen (class_name) + 1 /* class name */ +
3337 strlen (method_name) + 1 /* method name */ +
3338 strlen (sig) + 1 /* signature */ +
3339 strlen (first_filename) + 1 /* first file name */ +
3340 LEB128_SIZE /* token */ +
3341 LEB128_SIZE /* method id */ +
3342 LEB128_SIZE /* entries */
3345 emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3346 emit_string (logbuffer, image_name, strlen (image_name) + 1);
3347 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3348 emit_string (logbuffer, method_name, strlen (method_name) + 1);
3349 emit_string (logbuffer, sig, strlen (sig) + 1);
3350 emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3352 emit_uvalue (logbuffer, mono_method_get_token (method));
3353 emit_uvalue (logbuffer, method_id);
3354 emit_value (logbuffer, coverage_data->len);
3356 EXIT_LOG_EXPLICIT (DO_SEND);
3358 for (i = 0; i < coverage_data->len; i++) {
3359 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3361 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3362 EVENT_SIZE /* event */ +
3363 LEB128_SIZE /* method id */ +
3364 LEB128_SIZE /* offset */ +
3365 LEB128_SIZE /* counter */ +
3366 LEB128_SIZE /* line */ +
3367 LEB128_SIZE /* column */
3370 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3371 emit_uvalue (logbuffer, method_id);
3372 emit_uvalue (logbuffer, entry->offset);
3373 emit_uvalue (logbuffer, entry->counter);
3374 emit_uvalue (logbuffer, entry->line);
3375 emit_uvalue (logbuffer, entry->column);
3377 EXIT_LOG_EXPLICIT (DO_SEND);
3382 g_free (class_name);
3384 g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3385 g_ptr_array_free (coverage_data, TRUE);
3386 coverage_data = NULL;
3389 /* This empties the queue */
3391 count_queue (MonoLockFreeQueue *queue)
3393 MonoLockFreeQueueNode *node;
3396 while ((node = mono_lock_free_queue_dequeue (queue))) {
3398 mono_thread_hazardous_try_free (node, g_free);
3405 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3407 MonoClass *klass = (MonoClass *)key;
3408 MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3411 const char *assembly_name;
3412 int number_of_methods, partially_covered;
3413 guint fully_covered;
3415 image = mono_class_get_image (klass);
3416 assembly_name = mono_image_get_name (image);
3417 class_name = mono_type_get_name (mono_class_get_type (klass));
3419 assembly_name = assembly_name ? assembly_name : "";
3420 number_of_methods = mono_class_num_methods (klass);
3421 fully_covered = count_queue (class_methods);
3422 /* We don't handle partial covered yet */
3423 partially_covered = 0;
3425 ENTER_LOG (&coverage_classes_ctr, logbuffer,
3426 EVENT_SIZE /* event */ +
3427 strlen (assembly_name) + 1 /* assembly name */ +
3428 strlen (class_name) + 1 /* class name */ +
3429 LEB128_SIZE /* no. methods */ +
3430 LEB128_SIZE /* fully covered */ +
3431 LEB128_SIZE /* partially covered */
3434 emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3435 emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3436 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3437 emit_uvalue (logbuffer, number_of_methods);
3438 emit_uvalue (logbuffer, fully_covered);
3439 emit_uvalue (logbuffer, partially_covered);
3441 EXIT_LOG_EXPLICIT (DO_SEND);
3443 g_free (class_name);
3447 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3449 MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3451 *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3453 *fully_covered = count_queue (image_methods);
3457 // FIXME: We don't handle partially covered yet.
3458 *partially_covered = 0;
3462 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3464 MonoAssembly *assembly = (MonoAssembly *)value;
3465 MonoImage *image = mono_assembly_get_image (assembly);
3466 const char *name, *guid, *filename;
3467 int number_of_methods = 0, partially_covered = 0;
3468 guint fully_covered = 0;
3470 name = mono_image_get_name (image);
3471 guid = mono_image_get_guid (image);
3472 filename = mono_image_get_filename (image);
3474 name = name ? name : "";
3475 guid = guid ? guid : "";
3476 filename = filename ? filename : "";
3478 get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3480 ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3481 EVENT_SIZE /* event */ +
3482 strlen (name) + 1 /* name */ +
3483 strlen (guid) + 1 /* guid */ +
3484 strlen (filename) + 1 /* file name */ +
3485 LEB128_SIZE /* no. methods */ +
3486 LEB128_SIZE /* fully covered */ +
3487 LEB128_SIZE /* partially covered */
3490 emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3491 emit_string (logbuffer, name, strlen (name) + 1);
3492 emit_string (logbuffer, guid, strlen (guid) + 1);
3493 emit_string (logbuffer, filename, strlen (filename) + 1);
3494 emit_uvalue (logbuffer, number_of_methods);
3495 emit_uvalue (logbuffer, fully_covered);
3496 emit_uvalue (logbuffer, partially_covered);
3498 EXIT_LOG_EXPLICIT (DO_SEND);
3502 dump_coverage (MonoProfiler *prof)
3504 if (!coverage_initialized)
3509 mono_os_mutex_lock (&coverage_mutex);
3510 mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3511 mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3512 mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3513 mono_os_mutex_unlock (&coverage_mutex);
3516 static MonoLockFreeQueueNode *
3517 create_method_node (MonoMethod *method)
3519 MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3520 mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3521 node->method = method;
3523 return (MonoLockFreeQueueNode *) node;
3527 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3532 MonoAssembly *assembly;
3533 MonoMethodHeader *header;
3534 guint32 iflags, flags, code_size;
3535 char *fqn, *classname;
3536 gboolean has_positive, found;
3537 MonoLockFreeQueue *image_methods, *class_methods;
3538 MonoLockFreeQueueNode *node;
3540 g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3542 flags = mono_method_get_flags (method, &iflags);
3543 if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3544 (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/))
3547 // Don't need to do anything else if we're already tracking this method
3548 if (mono_conc_hashtable_lookup (coverage_methods, method))
3551 klass = mono_method_get_class (method);
3552 image = mono_class_get_image (klass);
3554 // Don't handle coverage for the core assemblies
3555 if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3558 if (prof->coverage_filters) {
3559 /* Check already filtered classes first */
3560 if (mono_conc_hashtable_lookup (filtered_classes, klass))
3563 classname = mono_type_get_name (mono_class_get_type (klass));
3565 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3567 // Check positive filters first
3568 has_positive = FALSE;
3570 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3571 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3573 if (filter [0] == '+') {
3574 filter = &filter [1];
3576 if (strstr (fqn, filter) != NULL)
3579 has_positive = TRUE;
3583 if (has_positive && !found) {
3584 mono_os_mutex_lock (&coverage_mutex);
3585 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3586 mono_os_mutex_unlock (&coverage_mutex);
3593 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3594 // FIXME: Is substring search sufficient?
3595 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3596 if (filter [0] == '+')
3600 filter = &filter [1];
3602 if (strstr (fqn, filter) != NULL) {
3603 mono_os_mutex_lock (&coverage_mutex);
3604 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3605 mono_os_mutex_unlock (&coverage_mutex);
3617 header = mono_method_get_header_checked (method, &error);
3618 mono_error_cleanup (&error);
3620 mono_method_header_get_code (header, &code_size, NULL);
3622 assembly = mono_image_get_assembly (image);
3624 // Need to keep the assemblies around for as long as they are kept in the hashtable
3625 // Nunit, for example, has a habit of unloading them before the coverage statistics are
3626 // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3627 mono_assembly_addref (assembly);
3629 mono_os_mutex_lock (&coverage_mutex);
3630 mono_conc_hashtable_insert (coverage_methods, method, method);
3631 mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3632 mono_os_mutex_unlock (&coverage_mutex);
3634 image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3636 if (image_methods == NULL) {
3637 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3638 mono_lock_free_queue_init (image_methods);
3639 mono_os_mutex_lock (&coverage_mutex);
3640 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3641 mono_os_mutex_unlock (&coverage_mutex);
3644 node = create_method_node (method);
3645 mono_lock_free_queue_enqueue (image_methods, node);
3647 class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3649 if (class_methods == NULL) {
3650 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3651 mono_lock_free_queue_init (class_methods);
3652 mono_os_mutex_lock (&coverage_mutex);
3653 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3654 mono_os_mutex_unlock (&coverage_mutex);
3657 node = create_method_node (method);
3658 mono_lock_free_queue_enqueue (class_methods, node);
3663 #define LINE_BUFFER_SIZE 4096
3664 /* Max file limit of 128KB */
3665 #define MAX_FILE_SIZE 128 * 1024
3667 get_file_content (FILE *stream)
3672 int res, offset = 0;
3674 res = fseek (stream, 0, SEEK_END);
3678 filesize = ftell (stream);
3682 res = fseek (stream, 0, SEEK_SET);
3686 if (filesize > MAX_FILE_SIZE)
3689 buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3690 while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3691 offset += bytes_read;
3693 /* NULL terminate our buffer */
3694 buffer[filesize] = '\0';
3699 get_next_line (char *contents, char **next_start)
3703 if (p == NULL || *p == '\0') {
3708 while (*p != '\n' && *p != '\0')
3713 *next_start = p + 1;
3721 init_suppressed_assemblies (void)
3727 suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3728 sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3729 if (sa_file == NULL)
3732 /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3733 content = get_file_content (sa_file);
3734 if (content == NULL)
3735 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting.");
3737 while ((line = get_next_line (content, &content))) {
3738 line = g_strchomp (g_strchug (line));
3739 /* No locking needed as we're doing initialization */
3740 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3747 parse_cov_filter_file (GPtrArray *filters, const char *file)
3749 FILE *filter_file = fopen (file, "r");
3751 if (filter_file == NULL) {
3752 mono_profiler_printf_err ("Could not open coverage filter file '%s'.", file);
3756 /* Don't need to free content as it is referred to by the lines stored in @filters */
3757 char *content = get_file_content (filter_file);
3759 if (content == NULL)
3760 mono_profiler_printf_err ("Coverage filter file '%s' is larger than 128kb - ignoring.", file);
3764 while ((line = get_next_line (content, &content)))
3765 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3767 fclose (filter_file);
3771 coverage_init (MonoProfiler *prof)
3773 g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3775 mono_os_mutex_init (&coverage_mutex);
3776 coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3777 coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3778 coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3779 filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3780 image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3781 init_suppressed_assemblies ();
3783 coverage_initialized = TRUE;
3787 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3789 MonoAssembly *assembly = (MonoAssembly *)value;
3790 mono_assembly_close (assembly);
3794 free_sample_hit (gpointer p)
3796 mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3800 cleanup_reusable_samples (MonoProfiler *prof)
3804 while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3805 mono_thread_hazardous_try_free (sample, free_sample_hit);
3809 log_shutdown (MonoProfiler *prof)
3811 InterlockedWrite (&in_shutdown, 1);
3814 counters_and_perfcounters_sample (prof);
3816 dump_coverage (prof);
3820 if (write (prof->pipes [1], &c, 1) != 1) {
3821 mono_profiler_printf_err ("Could not write to log profiler pipe: %s", strerror (errno));
3825 mono_native_thread_join (prof->helper_thread);
3827 mono_os_mutex_destroy (&counters_mutex);
3829 MonoCounterAgent *mc_next;
3831 for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3832 mc_next = cur->next;
3836 PerfCounterAgent *pc_next;
3838 for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3839 pc_next = cur->next;
3844 * Ensure that we empty the LLS completely, even if some nodes are
3845 * not immediately removed upon calling mono_lls_remove (), by
3846 * iterating until the head is NULL.
3848 while (profiler_thread_list.head) {
3849 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3850 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3852 remove_thread (thread);
3853 } MONO_LLS_FOREACH_SAFE_END
3857 * Ensure that all threads have been freed, so that we don't miss any
3858 * buffers when we shut down the writer thread below.
3860 mono_thread_hazardous_try_free_all ();
3862 InterlockedWrite (&prof->run_dumper_thread, 0);
3863 mono_os_sem_post (&prof->dumper_queue_sem);
3864 mono_native_thread_join (prof->dumper_thread);
3865 mono_os_sem_destroy (&prof->dumper_queue_sem);
3867 InterlockedWrite (&prof->run_writer_thread, 0);
3868 mono_os_sem_post (&prof->writer_queue_sem);
3869 mono_native_thread_join (prof->writer_thread);
3870 mono_os_sem_destroy (&prof->writer_queue_sem);
3873 * Free all writer queue entries, and ensure that all sample hits will be
3874 * added to the sample reuse queue.
3876 mono_thread_hazardous_try_free_all ();
3878 cleanup_reusable_samples (prof);
3881 * Finally, make sure that all sample hits are freed. This should cover all
3882 * hazardous data from the profiler. We can now be sure that the runtime
3883 * won't later invoke free functions in the profiler library after it has
3886 mono_thread_hazardous_try_free_all ();
3888 gint32 state = InterlockedRead (&buffer_lock_state);
3890 g_assert (!(state & 0xFFFF) && "Why is the reader count still non-zero?");
3891 g_assert (!(state >> 16) && "Why is the exclusive lock still held?");
3893 #if defined (HAVE_SYS_ZLIB)
3895 gzclose (prof->gzfile);
3897 if (prof->pipe_output)
3898 pclose (prof->file);
3900 fclose (prof->file);
3902 mono_conc_hashtable_destroy (prof->method_table);
3903 mono_os_mutex_destroy (&prof->method_table_mutex);
3905 if (coverage_initialized) {
3906 mono_os_mutex_lock (&coverage_mutex);
3907 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3908 mono_os_mutex_unlock (&coverage_mutex);
3910 mono_conc_hashtable_destroy (coverage_methods);
3911 mono_conc_hashtable_destroy (coverage_assemblies);
3912 mono_conc_hashtable_destroy (coverage_classes);
3913 mono_conc_hashtable_destroy (filtered_classes);
3915 mono_conc_hashtable_destroy (image_to_methods);
3916 mono_conc_hashtable_destroy (suppressed_assemblies);
3917 mono_os_mutex_destroy (&coverage_mutex);
3922 g_free (prof->args);
3927 new_filename (const char* filename)
3929 time_t t = time (NULL);
3930 int pid = process_id ();
3935 int count_dates = 0;
3939 for (p = filename; *p; p++) {
3950 if (!count_dates && !count_pids)
3951 return pstrdup (filename);
3952 snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3954 snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3955 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3956 s_date = strlen (time_buf);
3957 s_pid = strlen (pid_buf);
3958 d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3959 for (p = filename; *p; p++) {
3966 strcpy (d, time_buf);
3969 } else if (*p == 'p') {
3970 strcpy (d, pid_buf);
3973 } else if (*p == '%') {
3986 add_to_fd_set (fd_set *set, int fd, int *max_fd)
3989 * This should only trigger for the basic FDs (server socket, pipes) at
3990 * startup if for some mysterious reason they're too large. In this case,
3991 * the profiler really can't function, and we're better off printing an
3992 * error and exiting.
3994 if (fd >= FD_SETSIZE) {
3995 mono_profiler_printf_err ("File descriptor is out of bounds for fd_set: %d", fd);
4006 helper_thread (void *arg)
4008 MonoProfiler *prof = (MonoProfiler *) arg;
4010 mono_threads_attach_tools_thread ();
4011 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4013 MonoProfilerThread *thread = init_thread (prof, FALSE);
4015 GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4023 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4024 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4026 for (gint i = 0; i < command_sockets->len; i++)
4027 add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4029 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4031 // Sleep for 1sec or until a file descriptor has data.
4032 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4036 mono_profiler_printf_err ("Could not poll in log profiler helper thread: %s", strerror (errno));
4041 counters_and_perfcounters_sample (prof);
4043 buffer_lock_excl ();
4045 sync_point (SYNC_POINT_PERIODIC);
4047 buffer_unlock_excl ();
4049 // Are we shutting down?
4050 if (FD_ISSET (prof->pipes [0], &rfds)) {
4052 read (prof->pipes [0], &c, 1);
4056 for (gint i = 0; i < command_sockets->len; i++) {
4057 int fd = g_array_index (command_sockets, int, i);
4059 if (!FD_ISSET (fd, &rfds))
4063 int len = read (fd, buf, sizeof (buf) - 1);
4069 // The other end disconnected.
4070 g_array_remove_index (command_sockets, i);
4078 if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4079 // Rely on the finalization callback triggering a GC.
4080 heapshot_requested = 1;
4081 mono_gc_finalize_notify ();
4085 if (FD_ISSET (prof->server_socket, &rfds)) {
4086 int fd = accept (prof->server_socket, NULL, NULL);
4089 if (fd >= FD_SETSIZE)
4092 g_array_append_val (command_sockets, fd);
4097 for (gint i = 0; i < command_sockets->len; i++)
4098 close (g_array_index (command_sockets, int, i));
4100 g_array_free (command_sockets, TRUE);
4102 send_log_unsafe (FALSE);
4103 deinit_thread (thread);
4105 mono_thread_info_detach ();
4111 start_helper_thread (MonoProfiler* prof)
4113 if (pipe (prof->pipes) == -1) {
4114 mono_profiler_printf_err ("Could not create log profiler pipe: %s", strerror (errno));
4118 prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4120 if (prof->server_socket == -1) {
4121 mono_profiler_printf_err ("Could not create log profiler server socket: %s", strerror (errno));
4125 struct sockaddr_in server_address;
4127 memset (&server_address, 0, sizeof (server_address));
4128 server_address.sin_family = AF_INET;
4129 server_address.sin_addr.s_addr = INADDR_ANY;
4130 server_address.sin_port = htons (prof->command_port);
4132 if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4133 mono_profiler_printf_err ("Could not bind log profiler server socket on port %d: %s", prof->command_port, strerror (errno));
4134 close (prof->server_socket);
4138 if (listen (prof->server_socket, 1) == -1) {
4139 mono_profiler_printf_err ("Could not listen on log profiler server socket: %s", strerror (errno));
4140 close (prof->server_socket);
4144 socklen_t slen = sizeof (server_address);
4146 if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4147 mono_profiler_printf_err ("Could not retrieve assigned port for log profiler server socket: %s", strerror (errno));
4148 close (prof->server_socket);
4152 prof->command_port = ntohs (server_address.sin_port);
4154 if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4155 mono_profiler_printf_err ("Could not start log profiler helper thread");
4156 close (prof->server_socket);
4162 free_writer_entry (gpointer p)
4164 mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4168 handle_writer_queue_entry (MonoProfiler *prof)
4170 WriterQueueEntry *entry;
4172 if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4173 if (!entry->methods)
4176 gboolean wrote_methods = FALSE;
4179 * Encode the method events in a temporary log buffer that we
4180 * flush to disk before the main buffer, ensuring that all
4181 * methods have metadata emitted before they're referenced.
4183 * We use a 'proper' thread-local buffer for this as opposed
4184 * to allocating and freeing a buffer by hand because the call
4185 * to mono_method_full_name () below may trigger class load
4186 * events when it retrieves the signature of the method. So a
4187 * thread-local buffer needs to exist when such events occur.
4189 for (guint i = 0; i < entry->methods->len; i++) {
4190 MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4192 if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4193 goto free_info; // This method already has metadata emitted.
4196 * Other threads use this hash table to get a general
4197 * idea of whether a method has already been emitted to
4198 * the stream. Due to the way we add to this table, it
4199 * can easily happen that multiple threads queue up the
4200 * same methods, but that's OK since eventually all
4201 * methods will be in this table and the thread-local
4202 * method lists will just be empty for the rest of the
4205 mono_os_mutex_lock (&prof->method_table_mutex);
4206 mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4207 mono_os_mutex_unlock (&prof->method_table_mutex);
4209 char *name = mono_method_full_name (info->method, 1);
4210 int nlen = strlen (name) + 1;
4211 void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4212 int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4214 ENTER_LOG (&method_jits_ctr, logbuffer,
4215 EVENT_SIZE /* event */ +
4216 LEB128_SIZE /* method */ +
4217 LEB128_SIZE /* start */ +
4218 LEB128_SIZE /* size */ +
4222 emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4223 emit_method_inner (logbuffer, info->method);
4224 emit_ptr (logbuffer, cstart);
4225 emit_value (logbuffer, csize);
4227 memcpy (logbuffer->cursor, name, nlen);
4228 logbuffer->cursor += nlen;
4230 EXIT_LOG_EXPLICIT (NO_SEND);
4234 wrote_methods = TRUE;
4240 g_ptr_array_free (entry->methods, TRUE);
4242 if (wrote_methods) {
4243 MonoProfilerThread *thread = PROF_TLS_GET ();
4245 dump_buffer_threadless (prof, thread->buffer);
4246 init_buffer_state (thread);
4250 dump_buffer (prof, entry->buffer);
4252 mono_thread_hazardous_try_free (entry, free_writer_entry);
4261 writer_thread (void *arg)
4263 MonoProfiler *prof = (MonoProfiler *)arg;
4265 mono_threads_attach_tools_thread ();
4266 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4270 MonoProfilerThread *thread = init_thread (prof, FALSE);
4272 while (InterlockedRead (&prof->run_writer_thread)) {
4273 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4274 handle_writer_queue_entry (prof);
4277 /* Drain any remaining entries on shutdown. */
4278 while (handle_writer_queue_entry (prof));
4280 free_buffer (thread->buffer, thread->buffer->size);
4281 deinit_thread (thread);
4283 mono_thread_info_detach ();
4289 start_writer_thread (MonoProfiler* prof)
4291 InterlockedWrite (&prof->run_writer_thread, 1);
4293 if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4294 mono_profiler_printf_err ("Could not start log profiler writer thread");
4300 reuse_sample_hit (gpointer p)
4302 SampleHit *sample = p;
4304 mono_lock_free_queue_node_unpoison (&sample->node);
4305 mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4309 handle_dumper_queue_entry (MonoProfiler *prof)
4313 if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4314 for (int i = 0; i < sample->count; ++i) {
4315 MonoMethod *method = sample->frames [i].method;
4316 MonoDomain *domain = sample->frames [i].domain;
4317 void *address = sample->frames [i].base_address;
4320 g_assert (domain && "What happened to the domain pointer?");
4321 g_assert (address && "What happened to the instruction pointer?");
4323 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4326 sample->frames [i].method = mono_jit_info_get_method (ji);
4330 ENTER_LOG (&sample_hits_ctr, logbuffer,
4331 EVENT_SIZE /* event */ +
4332 LEB128_SIZE /* tid */ +
4333 LEB128_SIZE /* count */ +
4335 LEB128_SIZE /* ip */
4337 LEB128_SIZE /* managed count */ +
4339 LEB128_SIZE /* method */
4343 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4344 emit_ptr (logbuffer, (void *) sample->tid);
4345 emit_value (logbuffer, 1);
4347 // TODO: Actual native unwinding.
4348 for (int i = 0; i < 1; ++i) {
4349 emit_ptr (logbuffer, sample->ip);
4350 add_code_pointer ((uintptr_t) sample->ip);
4353 /* new in data version 6 */
4354 emit_uvalue (logbuffer, sample->count);
4356 for (int i = 0; i < sample->count; ++i)
4357 emit_method (logbuffer, sample->frames [i].method);
4359 EXIT_LOG_EXPLICIT (DO_SEND);
4361 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4363 dump_unmanaged_coderefs (prof);
4370 dumper_thread (void *arg)
4372 MonoProfiler *prof = (MonoProfiler *)arg;
4374 mono_threads_attach_tools_thread ();
4375 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4377 MonoProfilerThread *thread = init_thread (prof, FALSE);
4379 while (InterlockedRead (&prof->run_dumper_thread)) {
4381 * Flush samples every second so it doesn't seem like the profiler is
4382 * not working if the program is mostly idle.
4384 if (mono_os_sem_timedwait (&prof->dumper_queue_sem, 1000, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_TIMEDOUT)
4385 send_log_unsafe (FALSE);
4387 handle_dumper_queue_entry (prof);
4390 /* Drain any remaining entries on shutdown. */
4391 while (handle_dumper_queue_entry (prof));
4393 send_log_unsafe (FALSE);
4394 deinit_thread (thread);
4396 mono_thread_info_detach ();
4402 start_dumper_thread (MonoProfiler* prof)
4404 InterlockedWrite (&prof->run_dumper_thread, 1);
4406 if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4407 mono_profiler_printf_err ("Could not start log profiler dumper thread");
4413 register_counter (const char *name, gint32 *counter)
4415 mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4419 runtime_initialized (MonoProfiler *profiler)
4421 InterlockedWrite (&runtime_inited, 1);
4423 register_counter ("Sample events allocated", &sample_allocations_ctr);
4424 register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4426 register_counter ("Event: Sync points", &sync_points_ctr);
4427 register_counter ("Event: Heap objects", &heap_objects_ctr);
4428 register_counter ("Event: Heap starts", &heap_starts_ctr);
4429 register_counter ("Event: Heap ends", &heap_ends_ctr);
4430 register_counter ("Event: Heap roots", &heap_roots_ctr);
4431 register_counter ("Event: GC events", &gc_events_ctr);
4432 register_counter ("Event: GC resizes", &gc_resizes_ctr);
4433 register_counter ("Event: GC allocations", &gc_allocs_ctr);
4434 register_counter ("Event: GC moves", &gc_moves_ctr);
4435 register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4436 register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4437 register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4438 register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4439 register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4440 register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4441 register_counter ("Event: Image loads", &image_loads_ctr);
4442 register_counter ("Event: Image unloads", &image_unloads_ctr);
4443 register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4444 register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4445 register_counter ("Event: Class loads", &class_loads_ctr);
4446 register_counter ("Event: Class unloads", &class_unloads_ctr);
4447 register_counter ("Event: Method entries", &method_entries_ctr);
4448 register_counter ("Event: Method exits", &method_exits_ctr);
4449 register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4450 register_counter ("Event: Method JITs", &method_jits_ctr);
4451 register_counter ("Event: Code buffers", &code_buffers_ctr);
4452 register_counter ("Event: Exception throws", &exception_throws_ctr);
4453 register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4454 register_counter ("Event: Monitor events", &monitor_events_ctr);
4455 register_counter ("Event: Thread starts", &thread_starts_ctr);
4456 register_counter ("Event: Thread ends", &thread_ends_ctr);
4457 register_counter ("Event: Thread names", &thread_names_ctr);
4458 register_counter ("Event: Domain loads", &domain_loads_ctr);
4459 register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4460 register_counter ("Event: Domain names", &domain_names_ctr);
4461 register_counter ("Event: Context loads", &context_loads_ctr);
4462 register_counter ("Event: Context unloads", &context_unloads_ctr);
4463 register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4464 register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4465 register_counter ("Event: Sample hits", &sample_hits_ctr);
4466 register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4467 register_counter ("Event: Counter samples", &counter_samples_ctr);
4468 register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4469 register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4470 register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4471 register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4472 register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4473 register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4475 counters_init (profiler);
4478 * We must start the helper thread before the writer thread. This is
4479 * because the helper thread sets up the command port which is written to
4480 * the log header by the writer thread.
4482 start_helper_thread (profiler);
4483 start_writer_thread (profiler);
4484 start_dumper_thread (profiler);
4488 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4492 log_profiler = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4493 log_profiler->args = pstrdup (args);
4494 log_profiler->command_port = command_port;
4496 //If filename begin with +, append the pid at the end
4497 if (filename && *filename == '+')
4498 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4502 filename = "|mprof-report -";
4504 filename = "output.mlpd";
4505 nf = (char*)filename;
4507 nf = new_filename (filename);
4509 int s = strlen (nf) + 32;
4510 char *p = (char *) g_malloc (s);
4511 snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4517 log_profiler->file = popen (nf + 1, "w");
4518 log_profiler->pipe_output = 1;
4519 } else if (*nf == '#') {
4520 int fd = strtol (nf + 1, NULL, 10);
4521 log_profiler->file = fdopen (fd, "a");
4523 log_profiler->file = fopen (nf, "wb");
4525 if (!log_profiler->file) {
4526 mono_profiler_printf_err ("Could not create log profiler output file '%s'.", nf);
4530 #if defined (HAVE_SYS_ZLIB)
4532 log_profiler->gzfile = gzdopen (fileno (log_profiler->file), "wb");
4536 * If you hit this assert while increasing MAX_FRAMES, you need to increase
4537 * SAMPLE_BLOCK_SIZE as well.
4539 g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4541 // FIXME: We should free this stuff too.
4542 mono_lock_free_allocator_init_size_class (&log_profiler->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4543 mono_lock_free_allocator_init_allocator (&log_profiler->sample_allocator, &log_profiler->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4545 mono_lock_free_queue_init (&log_profiler->sample_reuse_queue);
4547 g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4549 // FIXME: We should free this stuff too.
4550 mono_lock_free_allocator_init_size_class (&log_profiler->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4551 mono_lock_free_allocator_init_allocator (&log_profiler->writer_entry_allocator, &log_profiler->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4553 mono_lock_free_queue_init (&log_profiler->writer_queue);
4554 mono_os_sem_init (&log_profiler->writer_queue_sem, 0);
4556 mono_lock_free_queue_init (&log_profiler->dumper_queue);
4557 mono_os_sem_init (&log_profiler->dumper_queue_sem, 0);
4559 mono_os_mutex_init (&log_profiler->method_table_mutex);
4560 log_profiler->method_table = mono_conc_hashtable_new (NULL, NULL);
4563 coverage_init (log_profiler);
4564 log_profiler->coverage_filters = filters;
4566 log_profiler->startup_time = current_time ();
4570 * declaration to silence the compiler: this is the entry point that
4571 * mono will load from the shared library and call.
4574 mono_profiler_init (const char *desc);
4577 mono_profiler_init_log (const char *desc);
4580 * this is the entry point that will be used when the profiler
4581 * is embedded inside the main executable.
4584 mono_profiler_init_log (const char *desc)
4586 mono_profiler_init (desc);
4590 mono_profiler_init (const char *desc)
4592 GPtrArray *filters = NULL;
4594 proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4596 //XXX maybe later cleanup to use config directly
4597 nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4598 no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4599 do_report = config.do_report;
4600 do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4601 hs_mode_ondemand = config.hs_mode_ondemand;
4602 hs_mode_ms = config.hs_mode_ms;
4603 hs_mode_gc = config.hs_mode_gc;
4604 do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4605 use_zip = config.use_zip;
4606 command_port = config.command_port;
4607 num_frames = config.num_frames;
4608 notraces = config.notraces;
4609 max_allocated_sample_hits = config.max_allocated_sample_hits;
4610 max_call_depth = config.max_call_depth;
4611 do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4613 if (config.cov_filter_files) {
4614 filters = g_ptr_array_new ();
4616 for (i = 0; i < config.cov_filter_files->len; ++i) {
4617 const char *name = config.cov_filter_files->pdata [i];
4618 parse_cov_filter_file (filters, name);
4626 create_profiler (desc, config.output_filename, filters);
4628 mono_lls_init (&profiler_thread_list, NULL);
4630 MonoProfilerHandle handle = log_profiler->handle = mono_profiler_install (log_profiler);
4632 //Required callbacks
4633 mono_profiler_set_runtime_shutdown_end_callback (handle, log_shutdown);
4634 mono_profiler_set_runtime_initialized_callback (handle, runtime_initialized);
4636 mono_profiler_set_gc_event_callback (handle, gc_event);
4637 mono_profiler_set_gc_resize_callback (handle, gc_resize);
4638 mono_profiler_set_thread_started_callback (handle, thread_start);
4639 mono_profiler_set_thread_stopped_callback (handle, thread_end);
4641 //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4642 mono_profiler_set_thread_name_callback (handle, thread_name);
4644 if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4645 mono_profiler_set_domain_loaded_callback (handle, domain_loaded);
4646 mono_profiler_set_domain_unloading_callback (handle, domain_unloaded);
4647 mono_profiler_set_domain_name_callback (handle, domain_name);
4650 if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4651 mono_profiler_set_assembly_loaded_callback (handle, assembly_loaded);
4652 mono_profiler_set_assembly_unloading_callback (handle, assembly_unloaded);
4655 if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4656 mono_profiler_set_image_loaded_callback (handle, image_loaded);
4657 mono_profiler_set_image_unloading_callback (handle, image_unloaded);
4660 if (config.effective_mask & PROFLOG_CLASS_EVENTS)
4661 mono_profiler_set_class_loaded_callback (handle, class_loaded);
4663 if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4664 mono_profiler_set_jit_done_callback (handle, method_jitted);
4665 mono_profiler_set_jit_code_buffer_callback (handle, code_buffer_new);
4668 if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4669 mono_profiler_set_exception_throw_callback (handle, throw_exc);
4670 mono_profiler_set_exception_clause_callback (handle, clause_exc);
4673 if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4674 mono_profiler_enable_allocations ();
4675 mono_profiler_set_gc_allocation_callback (handle, gc_alloc);
4678 //PROFLOG_GC_EVENTS is mandatory
4679 //PROFLOG_THREAD_EVENTS is mandatory
4681 if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4682 mono_profiler_set_call_instrumentation_filter_callback (handle, method_filter);
4683 mono_profiler_set_method_enter_callback (handle, method_enter);
4684 mono_profiler_set_method_leave_callback (handle, method_leave);
4685 mono_profiler_set_method_exception_leave_callback (handle, method_exc_leave);
4688 if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS)
4689 mono_profiler_set_coverage_filter_callback (handle, coverage_filter);
4691 if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4692 mono_profiler_enable_sampling (handle);
4694 if (!mono_profiler_set_sample_mode (handle, config.sampling_mode, config.sample_freq))
4695 mono_profiler_printf_err ("Another profiler controls sampling parameters; the log profiler will not be able to modify them.");
4697 mono_profiler_set_sample_hit_callback (handle, mono_sample_hit);
4700 if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4701 mono_profiler_set_monitor_contention_callback (handle, monitor_contention);
4702 mono_profiler_set_monitor_acquired_callback (handle, monitor_acquired);
4703 mono_profiler_set_monitor_failed_callback (handle, monitor_failed);
4706 if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS)
4707 mono_profiler_set_gc_moves_callback (handle, gc_moves);
4709 if (config.effective_mask & PROFLOG_GC_ROOT_EVENTS)
4710 mono_profiler_set_gc_roots_callback (handle, gc_roots);
4712 if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4713 mono_profiler_set_context_loaded_callback (handle, context_loaded);
4714 mono_profiler_set_context_unloaded_callback (handle, context_unloaded);
4717 if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4718 mono_profiler_set_gc_finalizing_callback (handle, finalize_begin);
4719 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4720 mono_profiler_set_gc_finalizing_object_callback (handle, finalize_object_begin);
4721 mono_profiler_set_gc_finalized_object_callback (handle, finalize_object_end);
4722 } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4723 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4724 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4727 //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4729 if (config.effective_mask & PROFLOG_GC_HANDLE_EVENTS) {
4730 mono_profiler_set_gc_handle_created_callback (handle, gc_handle_created);
4731 mono_profiler_set_gc_handle_deleted_callback (handle, gc_handle_deleted);