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-linked-list-set.h>
27 #include <mono/utils/mono-membar.h>
28 #include <mono/utils/mono-mmap.h>
29 #include <mono/utils/mono-os-mutex.h>
30 #include <mono/utils/mono-os-semaphore.h>
31 #include <mono/utils/mono-threads.h>
32 #include <mono/utils/mono-threads-api.h>
45 #if defined(__APPLE__)
46 #include <mach/mach_time.h>
48 #include <netinet/in.h>
49 #ifdef HAVE_SYS_MMAN_H
52 #include <sys/socket.h>
53 #if defined (HAVE_SYS_ZLIB)
57 #define BUFFER_SIZE (4096 * 16)
59 /* Worst-case size in bytes of a 64-bit value encoded with LEB128. */
60 #define LEB128_SIZE 10
62 /* Size of a value encoded as a single byte. */
63 #undef BYTE_SIZE // mach/i386/vm_param.h on OS X defines this to 8, but it isn't used for anything.
66 /* Size in bytes of the event prefix (ID + time). */
67 #define EVENT_SIZE (BYTE_SIZE + LEB128_SIZE)
69 static volatile gint32 runtime_inited;
70 static volatile gint32 in_shutdown;
72 static ProfilerConfig config;
73 static int nocalls = 0;
74 static int notraces = 0;
75 static int use_zip = 0;
76 static int do_report = 0;
77 static int do_heap_shot = 0;
78 static int max_call_depth = 0;
79 static int command_port = 0;
80 static int heapshot_requested = 0;
81 static int do_mono_sample = 0;
82 static int do_debug = 0;
83 static int do_coverage = 0;
84 static gboolean no_counters = FALSE;
85 static gboolean only_coverage = FALSE;
86 static gboolean debug_coverage = FALSE;
87 static int max_allocated_sample_hits;
89 #define ENABLED(EVT) (config.effective_mask & (EVT))
91 // Statistics for internal profiler data structures.
92 static gint32 sample_allocations_ctr,
93 buffer_allocations_ctr;
95 // Statistics for profiler events.
96 static gint32 sync_points_ctr,
105 gc_handle_creations_ctr,
106 gc_handle_deletions_ctr,
109 finalize_object_begins_ctr,
110 finalize_object_ends_ctr,
114 assembly_unloads_ctr,
119 method_exception_exits_ctr,
122 exception_throws_ctr,
123 exception_clauses_ctr,
124 monitor_contentions_ctr,
125 monitor_acquisitions_ctr,
126 monitor_failures_ctr,
138 counter_descriptors_ctr,
140 perfcounter_descriptors_ctr,
141 perfcounter_samples_ctr,
142 coverage_methods_ctr,
143 coverage_statements_ctr,
144 coverage_classes_ctr,
145 coverage_assemblies_ctr;
147 static MonoLinkedListSet profiler_thread_list;
153 * The file is composed by a header followed by 0 or more buffers.
154 * Each buffer contains events that happened on a thread: for a given thread
155 * buffers that appear later in the file are guaranteed to contain events
156 * that happened later in time. Buffers from separate threads could be interleaved,
158 * Buffers are not required to be aligned.
161 * [id: 4 bytes] constant value: LOG_HEADER_ID
162 * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
163 * [format: 1 byte] version of the data format for the rest of the file
164 * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
165 * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
166 * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
167 * [flags: 4 bytes] file format flags, should be 0 for now
168 * [pid: 4 bytes] pid of the profiled process
169 * [port: 2 bytes] tcp port for server if != 0
170 * [args size: 4 bytes] size of args
171 * [args: string] arguments passed to the profiler
172 * [arch size: 4 bytes] size of arch
173 * [arch: string] architecture the profiler is running on
174 * [os size: 4 bytes] size of os
175 * [os: string] operating system the profiler is running on
177 * The multiple byte integers are in little-endian format.
180 * [buffer header] [event]*
181 * Buffers have a fixed-size header followed by 0 or more bytes of event data.
182 * Timing information and other values in the event data are usually stored
183 * as uleb128 or sleb128 integers. To save space, as noted for each item below,
184 * some data is represented as a difference between the actual value and
185 * either the last value of the same type (like for timing information) or
186 * as the difference from a value stored in a buffer header.
188 * For timing information the data is stored as uleb128, since timing
189 * increases in a monotonic way in each thread: the value is the number of
190 * nanoseconds to add to the last seen timing data in a buffer. The first value
191 * in a buffer will be calculated from the time_base field in the buffer head.
193 * Object or heap sizes are stored as uleb128.
194 * Pointer differences are stored as sleb128, instead.
196 * If an unexpected value is found, the rest of the buffer should be ignored,
197 * as generally the later values need the former to be interpreted correctly.
199 * buffer header format:
200 * [bufid: 4 bytes] constant value: BUF_ID
201 * [len: 4 bytes] size of the data following the buffer header
202 * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
203 * [ptr_base: 8 bytes] base value for pointers
204 * [obj_base: 8 bytes] base value for object addresses
205 * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
206 * [method_base: 8 bytes] base value for MonoMethod pointers
209 * [extended info: upper 4 bits] [type: lower 4 bits]
210 * [time diff: uleb128] nanoseconds since last timing
212 * The data that follows depends on type and the extended info.
213 * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
214 * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
215 * The extended info bits are interpreted based on type, see
216 * each individual event description below.
217 * strings are represented as a 0-terminated utf8 sequence.
220 * [num: uleb128] number of frames following
221 * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
222 * pointer or the buffer method_base
226 * exinfo: flags: TYPE_ALLOC_BT
227 * [ptr: sleb128] class as a byte difference from ptr_base
228 * [obj: sleb128] object address as a byte difference from obj_base
229 * [size: uleb128] size of the object in the heap
230 * If the TYPE_ALLOC_BT flag is set, a backtrace follows.
234 * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
235 * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
236 * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
237 * if exinfo == TYPE_GC_RESIZE
238 * [heap_size: uleb128] new heap size
239 * if exinfo == TYPE_GC_EVENT
240 * [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
241 * [generation: byte] GC generation event refers to
242 * if exinfo == TYPE_GC_MOVE
243 * [num_objects: uleb128] number of object moves that follow
244 * [objaddr: sleb128]+ num_objects object pointer differences from obj_base
245 * num is always an even number: the even items are the old
246 * addresses, the odd numbers are the respective new object addresses
247 * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
248 * [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
249 * upper bits reserved as flags
250 * [handle: uleb128] GC handle value
251 * [objaddr: sleb128] object pointer differences from obj_base
252 * If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
253 * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
254 * [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
255 * upper bits reserved as flags
256 * [handle: uleb128] GC handle value
257 * If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
258 * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
259 * [object: sleb128] the object as a difference from obj_base
261 * type metadata format:
262 * type: TYPE_METADATA
263 * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN)
264 * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
265 * TYPE_THREAD, TYPE_CONTEXT
266 * [pointer: sleb128] pointer of the metadata type depending on mtype
267 * if mtype == TYPE_CLASS
268 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
269 * [name: string] full class name
270 * if mtype == TYPE_IMAGE
271 * [name: string] image file name
272 * if mtype == TYPE_ASSEMBLY
273 * [name: string] assembly name
274 * if mtype == TYPE_DOMAIN && exinfo == 0
275 * [name: string] domain friendly name
276 * if mtype == TYPE_CONTEXT
277 * [domain: sleb128] domain id as pointer
278 * if mtype == TYPE_THREAD && exinfo == 0
279 * [name: string] thread name
281 * type method format:
283 * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
284 * [method: sleb128] MonoMethod* as a pointer difference from the last such
285 * pointer or the buffer method_base
286 * if exinfo == TYPE_JIT
287 * [code address: sleb128] pointer to the native code as a diff from ptr_base
288 * [code size: uleb128] size of the generated code
289 * [name: string] full method name
291 * type exception format:
292 * type: TYPE_EXCEPTION
293 * exinfo: TYPE_THROW_BT flag or one of: TYPE_CLAUSE
294 * if exinfo == TYPE_CLAUSE
295 * [clause type: byte] MonoExceptionEnum enum value
296 * [clause index: uleb128] index of the current clause
297 * [method: sleb128] MonoMethod* as a pointer difference from the last such
298 * pointer or the buffer method_base
300 * [object: sleb128] the exception object as a difference from obj_base
301 * if exinfo has TYPE_THROW_BT set, a backtrace follows.
303 * type runtime format:
305 * exinfo: one of: TYPE_JITHELPER
306 * if exinfo == TYPE_JITHELPER
307 * [type: byte] MonoProfilerCodeBufferType enum value
308 * [buffer address: sleb128] pointer to the native code as a diff from ptr_base
309 * [buffer size: uleb128] size of the generated code
310 * if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
311 * [name: string] buffer description name
313 * type monitor format:
315 * exinfo: TYPE_MONITOR_BT flag and one of: MONO_PROFILER_MONITOR_(CONTENTION|FAIL|DONE)
316 * [object: sleb128] the lock object as a difference from obj_base
317 * if exinfo.low3bits == MONO_PROFILER_MONITOR_CONTENTION
318 * If the TYPE_MONITOR_BT flag is set, a backtrace follows.
322 * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
323 * if exinfo == TYPE_HEAP_OBJECT
324 * [object: sleb128] the object as a difference from obj_base
325 * [class: sleb128] the object MonoClass* as a difference from ptr_base
326 * [size: uleb128] size of the object on the heap
327 * [num_refs: uleb128] number of object references
328 * each referenced objref is preceded by a uleb128 encoded offset: the
329 * first offset is from the object address and each next offset is relative
330 * to the previous one
331 * [objrefs: sleb128]+ object referenced as a difference from obj_base
332 * The same object can appear multiple times, but only the first time
333 * with size != 0: in the other cases this data will only be used to
334 * provide additional referenced objects.
335 * if exinfo == TYPE_HEAP_ROOT
336 * [num_roots: uleb128] number of root references
337 * [num_gc: uleb128] number of major gcs
338 * [object: sleb128] the object as a difference from obj_base
339 * [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
340 * [extra_info: uleb128] the extra_info value
341 * object, root_type and extra_info are repeated num_roots times
345 * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
346 * if exinfo == TYPE_SAMPLE_HIT
347 * [thread: sleb128] thread id as difference from ptr_base
348 * [count: uleb128] number of following instruction addresses
349 * [ip: sleb128]* instruction pointer as difference from ptr_base
350 * [mbt_count: uleb128] number of managed backtrace frames
351 * [method: sleb128]* MonoMethod* as a pointer difference from the last such
352 * pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
353 * if exinfo == TYPE_SAMPLE_USYM
354 * [address: sleb128] symbol address as a difference from ptr_base
355 * [size: uleb128] symbol size (may be 0 if unknown)
356 * [name: string] symbol name
357 * if exinfo == TYPE_SAMPLE_UBIN
358 * [address: sleb128] address where binary has been loaded
359 * [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
360 * [size: uleb128] memory size
361 * [name: string] binary name
362 * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
363 * [len: uleb128] number of counters
365 * [section: uleb128] section of counter
366 * if section == MONO_COUNTER_PERFCOUNTERS:
367 * [section_name: string] section name of counter
368 * [name: string] name of counter
369 * [type: byte] type of counter
370 * [unit: byte] unit of counter
371 * [variance: byte] variance of counter
372 * [index: uleb128] unique index of counter
373 * if exinfo == TYPE_SAMPLE_COUNTERS
375 * [index: uleb128] unique index of counter
378 * [type: byte] type of counter value
381 * [0: uleb128] 0 -> value is null
383 * [1: uleb128] 1 -> value is not null
384 * [value: string] counter value
386 * [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
388 * type coverage format
389 * type: TYPE_COVERAGE
390 * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
391 * if exinfo == TYPE_COVERAGE_METHOD
392 * [assembly: string] name of assembly
393 * [class: string] name of the class
394 * [name: string] name of the method
395 * [signature: string] the signature of the method
396 * [filename: string] the file path of the file that contains this method
397 * [token: uleb128] the method token
398 * [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
399 * [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
400 * if exinfo == TYPE_COVERAGE_STATEMENTS
401 * [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
402 * [offset: uleb128] the il offset relative to the previous offset
403 * [counter: uleb128] the counter for this instruction
404 * [line: uleb128] the line of filename containing this instruction
405 * [column: uleb128] the column containing this instruction
406 * if exinfo == TYPE_COVERAGE_ASSEMBLY
407 * [name: string] assembly name
408 * [guid: string] assembly GUID
409 * [filename: string] assembly filename
410 * [number_of_methods: uleb128] the number of methods in this assembly
411 * [fully_covered: uleb128] the number of fully covered methods
412 * [partially_covered: uleb128] the number of partially covered methods
413 * currently partially_covered will always be 0, and fully_covered is the
414 * number of methods that are fully and partially covered.
415 * if exinfo == TYPE_COVERAGE_CLASS
416 * [name: string] assembly name
417 * [class: string] class name
418 * [number_of_methods: uleb128] the number of methods in this class
419 * [fully_covered: uleb128] the number of fully covered methods
420 * [partially_covered: uleb128] the number of partially covered methods
421 * currently partially_covered will always be 0, and fully_covered is the
422 * number of methods that are fully and partially covered.
426 * exinfo: one of: TYPE_SYNC_POINT
427 * if exinfo == TYPE_SYNC_POINT
428 * [type: byte] MonoProfilerSyncPointType enum value
431 // Pending data to be written to the log, for a single thread.
432 // Threads periodically flush their own LogBuffers by calling safe_send
433 typedef struct _LogBuffer LogBuffer;
435 // Next (older) LogBuffer in processing queue
441 uintptr_t method_base;
442 uintptr_t last_method;
446 // Bytes allocated for this LogBuffer
449 // Start of currently unused space in buffer
450 unsigned char* cursor;
452 // Pointer to start-of-structure-plus-size (for convenience)
453 unsigned char* buf_end;
455 // Start of data in buffer. Contents follow "buffer format" described above.
456 unsigned char buf [1];
460 MonoLinkedListSetNode node;
462 // Convenience pointer to the profiler structure.
463 MonoProfiler *profiler;
465 // Was this thread added to the LLS?
468 // The current log buffer for this thread.
471 // Methods referenced by events in `buffer`, see `MethodInfo`.
474 // Current call depth for enter/leave events.
477 // Indicates whether this thread is currently writing to its `buffer`.
480 // Has this thread written a thread end event to `buffer`?
482 } MonoProfilerThread;
487 return (uintptr_t) mono_native_thread_id_get ();
494 return (uintptr_t) GetCurrentProcessId ();
496 return (uintptr_t) getpid ();
501 static mach_timebase_info_data_t timebase_info;
502 #elif defined (HOST_WIN32)
503 static LARGE_INTEGER pcounter_freq;
506 #define TICKS_PER_SEC 1000000000LL
512 uint64_t time = mach_absolute_time ();
514 time *= timebase_info.numer;
515 time /= timebase_info.denom;
518 #elif defined (HOST_WIN32)
521 QueryPerformanceCounter (&value);
523 return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
524 #elif defined (CLOCK_MONOTONIC)
525 struct timespec tspec;
527 clock_gettime (CLOCK_MONOTONIC, &tspec);
529 return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
533 gettimeofday (&tv, NULL);
535 return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
539 static int timer_overhead;
545 mach_timebase_info (&timebase_info);
546 #elif defined (HOST_WIN32)
547 QueryPerformanceFrequency (&pcounter_freq);
550 uint64_t time_start = current_time ();
552 for (int i = 0; i < 256; ++i)
555 uint64_t time_end = current_time ();
557 timer_overhead = (time_end - time_start) / 256;
561 * These macros should be used when writing an event to a log buffer. They take
562 * care of a bunch of stuff that can be repetitive and error-prone, such as
563 * acquiring/releasing the buffer lock, incrementing the event counter,
564 * expanding the log buffer, processing requests, etc. They also create a scope
565 * so that it's harder to leak the LogBuffer pointer, which can be problematic
566 * as the pointer is unstable when the buffer lock isn't acquired.
569 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
571 MonoProfilerThread *thread__ = PROF_TLS_GET (); \
572 if (thread__->attached) \
574 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
575 thread__->busy = TRUE; \
576 InterlockedIncrement ((COUNTER)); \
577 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
579 #define EXIT_LOG_EXPLICIT(SEND) \
580 thread__->busy = FALSE; \
582 send_log_unsafe (TRUE); \
583 if (thread__->attached) \
587 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
589 #define NO_SEND FALSE
591 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
593 static volatile gint32 buffer_rwlock_count;
594 static volatile gpointer buffer_rwlock_exclusive;
596 // Can be used recursively.
601 * If the thread holding the exclusive lock tries to modify the
602 * reader count, just make it a no-op. This way, we also avoid
603 * invoking the GC safe point macros below, which could break if
604 * done from a thread that is currently the initiator of STW.
606 * In other words, we rely on the fact that the GC thread takes
607 * the exclusive lock in the gc_event () callback when the world
610 if (InterlockedReadPointer (&buffer_rwlock_exclusive) != (gpointer) thread_id ()) {
613 while (InterlockedReadPointer (&buffer_rwlock_exclusive))
614 mono_thread_info_yield ();
616 InterlockedIncrement (&buffer_rwlock_count);
621 mono_memory_barrier ();
627 mono_memory_barrier ();
629 // See the comment in buffer_lock ().
630 if (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id ())
633 g_assert (InterlockedRead (&buffer_rwlock_count) && "Why are we trying to decrement a zero reader count?");
635 InterlockedDecrement (&buffer_rwlock_count);
638 // Cannot be used recursively.
640 buffer_lock_excl (void)
642 gpointer tid = (gpointer) thread_id ();
644 g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) != tid && "Why are we taking the exclusive lock twice?");
648 while (InterlockedCompareExchangePointer (&buffer_rwlock_exclusive, tid, 0))
649 mono_thread_info_yield ();
651 while (InterlockedRead (&buffer_rwlock_count))
652 mono_thread_info_yield ();
656 mono_memory_barrier ();
660 buffer_unlock_excl (void)
662 mono_memory_barrier ();
664 g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why is the exclusive lock not held?");
665 g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why does another thread hold the exclusive lock?");
666 g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why are there readers when the exclusive lock is held?");
668 InterlockedWritePointer (&buffer_rwlock_exclusive, NULL);
671 typedef struct _BinaryObject BinaryObject;
672 struct _BinaryObject {
678 struct _MonoProfiler {
680 #if defined (HAVE_SYS_ZLIB)
684 uint64_t startup_time;
689 MonoNativeThreadId helper_thread;
690 MonoNativeThreadId writer_thread;
691 MonoNativeThreadId dumper_thread;
692 volatile gint32 run_writer_thread;
693 MonoLockFreeAllocSizeClass writer_entry_size_class;
694 MonoLockFreeAllocator writer_entry_allocator;
695 MonoLockFreeQueue writer_queue;
696 MonoSemType writer_queue_sem;
697 MonoConcurrentHashTable *method_table;
698 mono_mutex_t method_table_mutex;
699 volatile gint32 run_dumper_thread;
700 MonoLockFreeQueue dumper_queue;
701 MonoSemType dumper_queue_sem;
702 MonoLockFreeAllocSizeClass sample_size_class;
703 MonoLockFreeAllocator sample_allocator;
704 MonoLockFreeQueue sample_reuse_queue;
705 BinaryObject *binary_objects;
706 GPtrArray *coverage_filters;
710 MonoLockFreeQueueNode node;
715 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
725 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
726 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
727 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
728 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
730 static DWORD profiler_tls;
734 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
735 #define PROF_TLS_GET() (profiler_tls)
736 #define PROF_TLS_INIT()
737 #define PROF_TLS_FREE()
739 static __thread MonoProfilerThread *profiler_tls;
743 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
744 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
745 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
746 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
748 static pthread_key_t profiler_tls;
753 pstrdup (const char *s)
755 int len = strlen (s) + 1;
756 char *p = (char *) g_malloc (len);
762 alloc_buffer (int size)
764 return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
768 free_buffer (void *buf, int size)
770 mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
774 create_buffer (uintptr_t tid)
776 LogBuffer* buf = (LogBuffer *) alloc_buffer (BUFFER_SIZE);
778 InterlockedIncrement (&buffer_allocations_ctr);
780 buf->size = BUFFER_SIZE;
781 buf->time_base = current_time ();
782 buf->last_time = buf->time_base;
783 buf->buf_end = (unsigned char *) buf + buf->size;
784 buf->cursor = buf->buf;
785 buf->thread_id = tid;
791 * Must be called with the reader lock held if thread is the current thread, or
792 * the exclusive lock if thread is a different thread. However, if thread is
793 * the current thread, and init_thread () was called with add_to_lls = FALSE,
794 * then no locking is necessary.
797 init_buffer_state (MonoProfilerThread *thread)
799 thread->buffer = create_buffer (thread->node.key);
800 thread->methods = NULL;
804 clear_hazard_pointers (MonoThreadHazardPointers *hp)
806 mono_hazard_pointer_clear (hp, 0);
807 mono_hazard_pointer_clear (hp, 1);
808 mono_hazard_pointer_clear (hp, 2);
811 static MonoProfilerThread *
812 init_thread (MonoProfiler *prof, gboolean add_to_lls)
814 MonoProfilerThread *thread = PROF_TLS_GET ();
817 * Sometimes we may try to initialize a thread twice. One example is the
818 * main thread: We initialize it when setting up the profiler, but we will
819 * also get a thread_start () callback for it. Another example is when
820 * attaching new threads to the runtime: We may get a gc_alloc () callback
821 * for that thread's thread object (where we initialize it), soon followed
822 * by a thread_start () callback.
824 * These cases are harmless anyhow. Just return if we've already done the
825 * initialization work.
830 thread = g_malloc (sizeof (MonoProfilerThread));
831 thread->node.key = thread_id ();
832 thread->profiler = prof;
833 thread->attached = add_to_lls;
834 thread->call_depth = 0;
836 thread->ended = FALSE;
838 init_buffer_state (thread);
841 * Some internal profiler threads don't need to be cleaned up
842 * by the main thread on shutdown.
845 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
846 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
847 clear_hazard_pointers (hp);
850 PROF_TLS_SET (thread);
855 // Only valid if init_thread () was called with add_to_lls = FALSE.
857 deinit_thread (MonoProfilerThread *thread)
859 g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
865 // Only valid if init_thread () was called with add_to_lls = FALSE.
867 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
869 LogBuffer *old = thread->buffer;
871 if (old && old->cursor + bytes + 100 < old->buf_end)
874 LogBuffer *new_ = create_buffer (thread->node.key);
876 thread->buffer = new_;
882 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
887 uint8_t b = value & 0x7f;
890 if (value != 0) /* more bytes to come */
900 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
903 int negative = (value < 0);
904 unsigned int size = sizeof (intptr_t) * 8;
912 /* the following is unnecessary if the
913 * implementation of >>= uses an arithmetic rather
914 * than logical shift for a signed left operand
918 value |= - ((intptr_t) 1 <<(size - 7));
920 /* sign bit of byte is second high order bit (0x40) */
921 if ((value == 0 && !(byte & 0x40)) ||
922 (value == -1 && (byte & 0x40)))
934 emit_byte (LogBuffer *logbuffer, int value)
936 logbuffer->cursor [0] = value;
939 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
943 emit_value (LogBuffer *logbuffer, int value)
945 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
947 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
951 emit_time (LogBuffer *logbuffer, uint64_t value)
953 uint64_t tdiff = value - logbuffer->last_time;
954 encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
955 logbuffer->last_time = value;
957 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
961 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
963 emit_byte (logbuffer, event);
964 emit_time (logbuffer, time);
968 emit_event (LogBuffer *logbuffer, int event)
970 emit_event_time (logbuffer, event, current_time ());
974 emit_svalue (LogBuffer *logbuffer, int64_t value)
976 encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
978 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
982 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
984 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
986 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
990 emit_ptr (LogBuffer *logbuffer, void *ptr)
992 if (!logbuffer->ptr_base)
993 logbuffer->ptr_base = (uintptr_t) ptr;
995 emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
997 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1001 emit_method_inner (LogBuffer *logbuffer, void *method)
1003 if (!logbuffer->method_base) {
1004 logbuffer->method_base = (intptr_t) method;
1005 logbuffer->last_method = (intptr_t) method;
1008 encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1009 logbuffer->last_method = (intptr_t) method;
1011 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1015 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1017 MonoProfilerThread *thread = PROF_TLS_GET ();
1019 if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1020 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1022 info->method = method;
1024 info->time = current_time ();
1026 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1027 g_ptr_array_add (arr, info);
1032 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1034 register_method_local (method, NULL);
1035 emit_method_inner (logbuffer, method);
1039 emit_obj (LogBuffer *logbuffer, void *ptr)
1041 if (!logbuffer->obj_base)
1042 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1044 emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1046 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1050 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1054 for (; i < size; i++) {
1057 emit_byte (logbuffer, str [i]);
1060 emit_byte (logbuffer, '\0');
1064 emit_double (LogBuffer *logbuffer, double value)
1067 unsigned char buffer[8];
1068 memcpy (buffer, &value, 8);
1069 #if G_BYTE_ORDER == G_BIG_ENDIAN
1070 for (i = 7; i >= 0; i--)
1072 for (i = 0; i < 8; i++)
1074 emit_byte (logbuffer, buffer[i]);
1078 write_int16 (char *buf, int32_t value)
1081 for (i = 0; i < 2; ++i) {
1089 write_int32 (char *buf, int32_t value)
1092 for (i = 0; i < 4; ++i) {
1100 write_int64 (char *buf, int64_t value)
1103 for (i = 0; i < 8; ++i) {
1111 write_header_string (char *p, const char *str)
1113 size_t len = strlen (str) + 1;
1115 p = write_int32 (p, len);
1122 dump_header (MonoProfiler *profiler)
1124 const char *args = profiler->args;
1125 const char *arch = mono_config_get_cpu ();
1126 const char *os = mono_config_get_os ();
1128 char *hbuf = g_malloc (
1129 sizeof (gint32) /* header id */ +
1130 sizeof (gint8) /* major version */ +
1131 sizeof (gint8) /* minor version */ +
1132 sizeof (gint8) /* data version */ +
1133 sizeof (gint8) /* word size */ +
1134 sizeof (gint64) /* startup time */ +
1135 sizeof (gint32) /* timer overhead */ +
1136 sizeof (gint32) /* flags */ +
1137 sizeof (gint32) /* process id */ +
1138 sizeof (gint16) /* command port */ +
1139 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1140 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1141 sizeof (gint32) + strlen (os) + 1 /* operating system */
1145 p = write_int32 (p, LOG_HEADER_ID);
1146 *p++ = LOG_VERSION_MAJOR;
1147 *p++ = LOG_VERSION_MINOR;
1148 *p++ = LOG_DATA_VERSION;
1149 *p++ = sizeof (void *);
1150 p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1151 p = write_int32 (p, timer_overhead);
1152 p = write_int32 (p, 0); /* flags */
1153 p = write_int32 (p, process_id ());
1154 p = write_int16 (p, profiler->command_port);
1155 p = write_header_string (p, args);
1156 p = write_header_string (p, arch);
1157 p = write_header_string (p, os);
1159 #if defined (HAVE_SYS_ZLIB)
1160 if (profiler->gzfile) {
1161 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1165 fwrite (hbuf, p - hbuf, 1, profiler->file);
1166 fflush (profiler->file);
1173 * Must be called with the reader lock held if thread is the current thread, or
1174 * the exclusive lock if thread is a different thread. However, if thread is
1175 * the current thread, and init_thread () was called with add_to_lls = FALSE,
1176 * then no locking is necessary.
1179 send_buffer (MonoProfilerThread *thread)
1181 WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1182 entry->methods = thread->methods;
1183 entry->buffer = thread->buffer;
1185 mono_lock_free_queue_node_init (&entry->node, FALSE);
1187 mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1188 mono_os_sem_post (&thread->profiler->writer_queue_sem);
1192 free_thread (gpointer p)
1194 MonoProfilerThread *thread = p;
1196 if (!thread->ended) {
1198 * The thread is being cleaned up by the main thread during
1199 * shutdown. This typically happens for internal runtime
1200 * threads. We need to synthesize a thread end event.
1203 InterlockedIncrement (&thread_ends_ctr);
1205 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1206 LogBuffer *buf = ensure_logbuf_unsafe (thread,
1207 EVENT_SIZE /* event */ +
1208 BYTE_SIZE /* type */ +
1209 LEB128_SIZE /* tid */
1212 emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1213 emit_byte (buf, TYPE_THREAD);
1214 emit_ptr (buf, (void *) thread->node.key);
1218 send_buffer (thread);
1224 remove_thread (MonoProfilerThread *thread)
1226 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1228 if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1229 mono_thread_hazardous_try_free (thread, free_thread);
1231 clear_hazard_pointers (hp);
1235 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1241 dump_buffer (profiler, buf->next);
1243 if (buf->cursor - buf->buf) {
1244 p = write_int32 (p, BUF_ID);
1245 p = write_int32 (p, buf->cursor - buf->buf);
1246 p = write_int64 (p, buf->time_base);
1247 p = write_int64 (p, buf->ptr_base);
1248 p = write_int64 (p, buf->obj_base);
1249 p = write_int64 (p, buf->thread_id);
1250 p = write_int64 (p, buf->method_base);
1252 #if defined (HAVE_SYS_ZLIB)
1253 if (profiler->gzfile) {
1254 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1255 gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1259 fwrite (hbuf, p - hbuf, 1, profiler->file);
1260 fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1261 fflush (profiler->file);
1265 free_buffer (buf, buf->size);
1269 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1271 for (LogBuffer *iter = buf; iter; iter = iter->next)
1272 iter->thread_id = 0;
1274 dump_buffer (profiler, buf);
1277 // Only valid if init_thread () was called with add_to_lls = FALSE.
1279 send_log_unsafe (gboolean if_needed)
1281 MonoProfilerThread *thread = PROF_TLS_GET ();
1283 if (!if_needed || (if_needed && thread->buffer->next)) {
1284 if (!thread->attached)
1285 for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1286 iter->thread_id = 0;
1288 send_buffer (thread);
1289 init_buffer_state (thread);
1293 // Assumes that the exclusive lock is held.
1295 sync_point_flush (void)
1297 g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1299 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1300 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1302 send_buffer (thread);
1303 init_buffer_state (thread);
1304 } MONO_LLS_FOREACH_SAFE_END
1307 // Assumes that the exclusive lock is held.
1309 sync_point_mark (MonoProfilerSyncPointType type)
1311 g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1313 ENTER_LOG (&sync_points_ctr, logbuffer,
1314 EVENT_SIZE /* event */ +
1315 LEB128_SIZE /* type */
1318 emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1319 emit_byte (logbuffer, type);
1321 EXIT_LOG_EXPLICIT (NO_SEND);
1323 send_log_unsafe (FALSE);
1326 // Assumes that the exclusive lock is held.
1328 sync_point (MonoProfilerSyncPointType type)
1330 sync_point_flush ();
1331 sync_point_mark (type);
1335 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1337 /* account for object alignment in the heap */
1341 ENTER_LOG (&heap_objects_ctr, logbuffer,
1342 EVENT_SIZE /* event */ +
1343 LEB128_SIZE /* obj */ +
1344 LEB128_SIZE /* klass */ +
1345 LEB128_SIZE /* size */ +
1346 LEB128_SIZE /* num */ +
1348 LEB128_SIZE /* offset */ +
1349 LEB128_SIZE /* ref */
1353 emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1354 emit_obj (logbuffer, obj);
1355 emit_ptr (logbuffer, klass);
1356 emit_value (logbuffer, size);
1357 emit_value (logbuffer, num);
1359 uintptr_t last_offset = 0;
1361 for (int i = 0; i < num; ++i) {
1362 emit_value (logbuffer, offsets [i] - last_offset);
1363 last_offset = offsets [i];
1364 emit_obj (logbuffer, refs [i]);
1367 EXIT_LOG_EXPLICIT (DO_SEND);
1372 static unsigned int hs_mode_ms = 0;
1373 static unsigned int hs_mode_gc = 0;
1374 static unsigned int hs_mode_ondemand = 0;
1375 static unsigned int gc_count = 0;
1376 static uint64_t last_hs_time = 0;
1377 static gboolean do_heap_walk = FALSE;
1378 static gboolean ignore_heap_events;
1381 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
1383 if (ignore_heap_events)
1386 ENTER_LOG (&heap_roots_ctr, logbuffer,
1387 EVENT_SIZE /* event */ +
1388 LEB128_SIZE /* num */ +
1389 LEB128_SIZE /* collections */ +
1391 LEB128_SIZE /* object */ +
1392 LEB128_SIZE /* root type */ +
1393 LEB128_SIZE /* extra info */
1397 emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1398 emit_value (logbuffer, num);
1399 emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1401 for (int i = 0; i < num; ++i) {
1402 emit_obj (logbuffer, objects [i]);
1403 emit_byte (logbuffer, root_types [i]);
1404 emit_value (logbuffer, extra_info [i]);
1407 EXIT_LOG_EXPLICIT (DO_SEND);
1412 trigger_on_demand_heapshot (void)
1414 if (heapshot_requested)
1415 mono_gc_collect (mono_gc_max_generation ());
1418 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1421 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation)
1423 if (ev == MONO_GC_EVENT_START) {
1424 uint64_t now = current_time ();
1426 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1427 do_heap_walk = TRUE;
1428 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1429 do_heap_walk = TRUE;
1430 else if (hs_mode_ondemand)
1431 do_heap_walk = heapshot_requested;
1432 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1433 do_heap_walk = TRUE;
1435 //If using heapshot, ignore events for collections we don't care
1436 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1437 // Ignore events generated during the collection itself (IE GC ROOTS)
1438 ignore_heap_events = !do_heap_walk;
1443 if (ENABLED (PROFLOG_GC_EVENTS)) {
1444 ENTER_LOG (&gc_events_ctr, logbuffer,
1445 EVENT_SIZE /* event */ +
1446 BYTE_SIZE /* gc event */ +
1447 BYTE_SIZE /* generation */
1450 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1451 emit_byte (logbuffer, ev);
1452 emit_byte (logbuffer, generation);
1454 EXIT_LOG_EXPLICIT (NO_SEND);
1458 case MONO_GC_EVENT_START:
1459 if (generation == mono_gc_max_generation ())
1463 case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1465 * Ensure that no thread can be in the middle of writing to
1466 * a buffer when the world stops...
1468 buffer_lock_excl ();
1470 case MONO_GC_EVENT_POST_STOP_WORLD:
1472 * ... So that we now have a consistent view of all buffers.
1473 * This allows us to flush them. We need to do this because
1474 * they may contain object allocation events that need to be
1475 * committed to the log file before any object move events
1476 * that will be produced during this GC.
1478 if (ENABLED (ALL_GC_EVENTS_MASK))
1479 sync_point (SYNC_POINT_WORLD_STOP);
1482 * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1483 * Right now, that's the case for GC Moves, GC Roots or heapshots.
1485 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1486 ENTER_LOG (&heap_starts_ctr, logbuffer,
1487 EVENT_SIZE /* event */
1490 emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1492 EXIT_LOG_EXPLICIT (DO_SEND);
1496 case MONO_GC_EVENT_PRE_START_WORLD:
1497 if (do_heap_shot && do_heap_walk)
1498 mono_gc_walk_heap (0, gc_reference, NULL);
1500 /* Matching HEAP_END to the HEAP_START from above */
1501 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1502 ENTER_LOG (&heap_ends_ctr, logbuffer,
1503 EVENT_SIZE /* event */
1506 emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1508 EXIT_LOG_EXPLICIT (DO_SEND);
1511 if (do_heap_shot && do_heap_walk) {
1512 do_heap_walk = FALSE;
1513 heapshot_requested = 0;
1514 last_hs_time = current_time ();
1517 case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1519 * Similarly, we must now make sure that any object moves
1520 * written to the GC thread's buffer are flushed. Otherwise,
1521 * object allocation events for certain addresses could come
1522 * after the move events that made those addresses available.
1524 if (ENABLED (ALL_GC_EVENTS_MASK))
1525 sync_point_mark (SYNC_POINT_WORLD_START);
1528 * Finally, it is safe to allow other threads to write to
1529 * their buffers again.
1531 buffer_unlock_excl ();
1539 gc_resize (MonoProfiler *profiler, int64_t new_size)
1541 ENTER_LOG (&gc_resizes_ctr, logbuffer,
1542 EVENT_SIZE /* event */ +
1543 LEB128_SIZE /* new size */
1546 emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1547 emit_value (logbuffer, new_size);
1549 EXIT_LOG_EXPLICIT (DO_SEND);
1554 MonoMethod* methods [MAX_FRAMES];
1555 int32_t il_offsets [MAX_FRAMES];
1556 int32_t native_offsets [MAX_FRAMES];
1559 static int num_frames = MAX_FRAMES;
1562 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1564 FrameData *frame = (FrameData *)data;
1565 if (method && frame->count < num_frames) {
1566 frame->il_offsets [frame->count] = il_offset;
1567 frame->native_offsets [frame->count] = native_offset;
1568 frame->methods [frame->count++] = method;
1569 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1571 return frame->count == num_frames;
1575 * a note about stack walks: they can cause more profiler events to fire,
1576 * so we need to make sure they don't happen after we started emitting an
1577 * event, hence the collect_bt/emit_bt split.
1580 collect_bt (FrameData *data)
1583 mono_stack_walk_no_il (walk_stack, data);
1587 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1589 /* FIXME: this is actually tons of data and we should
1590 * just output it the first time and use an id the next
1592 if (data->count > num_frames)
1593 printf ("bad num frames: %d\n", data->count);
1594 emit_value (logbuffer, data->count);
1595 //if (*p != data.count) {
1596 // printf ("bad num frames enc at %d: %d -> %d\n", count, data.count, *p); printf ("frames end: %p->%p\n", p, logbuffer->cursor); exit(0);}
1597 while (data->count) {
1598 emit_method (logbuffer, data->methods [--data->count]);
1603 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
1605 init_thread (prof, TRUE);
1607 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1609 uintptr_t len = mono_object_get_size (obj);
1610 /* account for object alignment in the heap */
1617 ENTER_LOG (&gc_allocs_ctr, logbuffer,
1618 EVENT_SIZE /* event */ +
1619 LEB128_SIZE /* klass */ +
1620 LEB128_SIZE /* obj */ +
1621 LEB128_SIZE /* size */ +
1623 LEB128_SIZE /* count */ +
1625 LEB128_SIZE /* method */
1630 emit_event (logbuffer, do_bt | TYPE_ALLOC);
1631 emit_ptr (logbuffer, klass);
1632 emit_obj (logbuffer, obj);
1633 emit_value (logbuffer, len);
1636 emit_bt (prof, logbuffer, &data);
1642 gc_moves (MonoProfiler *prof, void **objects, int num)
1644 ENTER_LOG (&gc_moves_ctr, logbuffer,
1645 EVENT_SIZE /* event */ +
1646 LEB128_SIZE /* num */ +
1648 LEB128_SIZE /* object */
1652 emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1653 emit_value (logbuffer, num);
1655 for (int i = 0; i < num; ++i)
1656 emit_obj (logbuffer, objects [i]);
1658 EXIT_LOG_EXPLICIT (DO_SEND);
1662 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
1664 int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1670 gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1672 ENTER_LOG (ctr, logbuffer,
1673 EVENT_SIZE /* event */ +
1674 LEB128_SIZE /* type */ +
1675 LEB128_SIZE /* handle */ +
1676 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1677 LEB128_SIZE /* obj */
1680 LEB128_SIZE /* count */ +
1682 LEB128_SIZE /* method */
1687 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1688 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1689 else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1690 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1692 g_assert_not_reached ();
1694 emit_value (logbuffer, type);
1695 emit_value (logbuffer, handle);
1697 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1698 emit_obj (logbuffer, obj);
1701 emit_bt (prof, logbuffer, &data);
1707 finalize_begin (MonoProfiler *prof)
1709 ENTER_LOG (&finalize_begins_ctr, buf,
1710 EVENT_SIZE /* event */
1713 emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1719 finalize_end (MonoProfiler *prof)
1721 trigger_on_demand_heapshot ();
1722 if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1723 ENTER_LOG (&finalize_ends_ctr, buf,
1724 EVENT_SIZE /* event */
1727 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1734 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1736 ENTER_LOG (&finalize_object_begins_ctr, buf,
1737 EVENT_SIZE /* event */ +
1738 LEB128_SIZE /* obj */
1741 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1742 emit_obj (buf, obj);
1748 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1750 ENTER_LOG (&finalize_object_ends_ctr, buf,
1751 EVENT_SIZE /* event */ +
1752 LEB128_SIZE /* obj */
1755 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1756 emit_obj (buf, obj);
1762 push_nesting (char *p, MonoClass *klass)
1767 nesting = mono_class_get_nesting_type (klass);
1769 p = push_nesting (p, nesting);
1773 name = mono_class_get_name (klass);
1774 nspace = mono_class_get_namespace (klass);
1777 p += strlen (nspace);
1787 type_name (MonoClass *klass)
1791 push_nesting (buf, klass);
1792 p = (char *) g_malloc (strlen (buf) + 1);
1798 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
1800 if (result != MONO_PROFILE_OK)
1803 const char *name = mono_image_get_filename (image);
1804 int nlen = strlen (name) + 1;
1806 ENTER_LOG (&image_loads_ctr, logbuffer,
1807 EVENT_SIZE /* event */ +
1808 BYTE_SIZE /* type */ +
1809 LEB128_SIZE /* image */ +
1813 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1814 emit_byte (logbuffer, TYPE_IMAGE);
1815 emit_ptr (logbuffer, image);
1816 memcpy (logbuffer->cursor, name, nlen);
1817 logbuffer->cursor += nlen;
1823 image_unloaded (MonoProfiler *prof, MonoImage *image)
1825 const char *name = mono_image_get_filename (image);
1826 int nlen = strlen (name) + 1;
1828 ENTER_LOG (&image_unloads_ctr, logbuffer,
1829 EVENT_SIZE /* event */ +
1830 BYTE_SIZE /* type */ +
1831 LEB128_SIZE /* image */ +
1835 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1836 emit_byte (logbuffer, TYPE_IMAGE);
1837 emit_ptr (logbuffer, image);
1838 memcpy (logbuffer->cursor, name, nlen);
1839 logbuffer->cursor += nlen;
1845 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly, int result)
1847 if (result != MONO_PROFILE_OK)
1850 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1851 int nlen = strlen (name) + 1;
1853 ENTER_LOG (&assembly_loads_ctr, logbuffer,
1854 EVENT_SIZE /* event */ +
1855 BYTE_SIZE /* type */ +
1856 LEB128_SIZE /* assembly */ +
1860 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1861 emit_byte (logbuffer, TYPE_ASSEMBLY);
1862 emit_ptr (logbuffer, assembly);
1863 memcpy (logbuffer->cursor, name, nlen);
1864 logbuffer->cursor += nlen;
1872 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1874 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1875 int nlen = strlen (name) + 1;
1877 ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1878 EVENT_SIZE /* event */ +
1879 BYTE_SIZE /* type */ +
1880 LEB128_SIZE /* assembly */ +
1884 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1885 emit_byte (logbuffer, TYPE_ASSEMBLY);
1886 emit_ptr (logbuffer, assembly);
1887 memcpy (logbuffer->cursor, name, nlen);
1888 logbuffer->cursor += nlen;
1896 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
1898 if (result != MONO_PROFILE_OK)
1903 if (InterlockedRead (&runtime_inited))
1904 name = mono_type_get_name (mono_class_get_type (klass));
1906 name = type_name (klass);
1908 int nlen = strlen (name) + 1;
1909 MonoImage *image = mono_class_get_image (klass);
1911 ENTER_LOG (&class_loads_ctr, logbuffer,
1912 EVENT_SIZE /* event */ +
1913 BYTE_SIZE /* type */ +
1914 LEB128_SIZE /* klass */ +
1915 LEB128_SIZE /* image */ +
1919 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1920 emit_byte (logbuffer, TYPE_CLASS);
1921 emit_ptr (logbuffer, klass);
1922 emit_ptr (logbuffer, image);
1923 memcpy (logbuffer->cursor, name, nlen);
1924 logbuffer->cursor += nlen;
1935 class_unloaded (MonoProfiler *prof, MonoClass *klass)
1939 if (InterlockedRead (&runtime_inited))
1940 name = mono_type_get_name (mono_class_get_type (klass));
1942 name = type_name (klass);
1944 int nlen = strlen (name) + 1;
1945 MonoImage *image = mono_class_get_image (klass);
1947 ENTER_LOG (&class_unloads_ctr, logbuffer,
1948 EVENT_SIZE /* event */ +
1949 BYTE_SIZE /* type */ +
1950 LEB128_SIZE /* klass */ +
1951 LEB128_SIZE /* image */ +
1955 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1956 emit_byte (logbuffer, TYPE_CLASS);
1957 emit_ptr (logbuffer, klass);
1958 emit_ptr (logbuffer, image);
1959 memcpy (logbuffer->cursor, name, nlen);
1960 logbuffer->cursor += nlen;
1970 static void process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method);
1973 method_enter (MonoProfiler *prof, MonoMethod *method)
1975 process_method_enter_coverage (prof, method);
1977 if (!only_coverage && PROF_TLS_GET ()->call_depth++ <= max_call_depth) {
1978 ENTER_LOG (&method_entries_ctr, logbuffer,
1979 EVENT_SIZE /* event */ +
1980 LEB128_SIZE /* method */
1983 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
1984 emit_method (logbuffer, method);
1991 method_leave (MonoProfiler *prof, MonoMethod *method)
1993 if (!only_coverage && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
1994 ENTER_LOG (&method_exits_ctr, logbuffer,
1995 EVENT_SIZE /* event */ +
1996 LEB128_SIZE /* method */
1999 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2000 emit_method (logbuffer, method);
2007 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
2009 if (!only_coverage && !nocalls && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
2010 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2011 EVENT_SIZE /* event */ +
2012 LEB128_SIZE /* method */
2015 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2016 emit_method (logbuffer, method);
2023 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji, int result)
2025 if (result != MONO_PROFILE_OK)
2028 register_method_local (method, ji);
2032 code_buffer_new (MonoProfiler *prof, void *buffer, int size, MonoProfilerCodeBufferType type, void *data)
2037 if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2038 name = (char *) data;
2039 nlen = strlen (name) + 1;
2045 ENTER_LOG (&code_buffers_ctr, logbuffer,
2046 EVENT_SIZE /* event */ +
2047 BYTE_SIZE /* type */ +
2048 LEB128_SIZE /* buffer */ +
2049 LEB128_SIZE /* size */ +
2055 emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2056 emit_byte (logbuffer, type);
2057 emit_ptr (logbuffer, buffer);
2058 emit_value (logbuffer, size);
2061 memcpy (logbuffer->cursor, name, nlen);
2062 logbuffer->cursor += nlen;
2069 throw_exc (MonoProfiler *prof, MonoObject *object)
2071 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2077 ENTER_LOG (&exception_throws_ctr, logbuffer,
2078 EVENT_SIZE /* event */ +
2079 LEB128_SIZE /* object */ +
2081 LEB128_SIZE /* count */ +
2083 LEB128_SIZE /* method */
2088 emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2089 emit_obj (logbuffer, object);
2092 emit_bt (prof, logbuffer, &data);
2098 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num)
2100 ENTER_LOG (&exception_clauses_ctr, logbuffer,
2101 EVENT_SIZE /* event */ +
2102 BYTE_SIZE /* clause type */ +
2103 LEB128_SIZE /* clause num */ +
2104 LEB128_SIZE /* method */
2107 emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2108 emit_byte (logbuffer, clause_type);
2109 emit_value (logbuffer, clause_num);
2110 emit_method (logbuffer, method);
2116 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent event)
2118 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces && event == MONO_PROFILER_MONITOR_CONTENTION) ? TYPE_MONITOR_BT : 0;
2127 case MONO_PROFILER_MONITOR_CONTENTION:
2128 ctr = &monitor_contentions_ctr;
2130 case MONO_PROFILER_MONITOR_DONE:
2131 ctr = &monitor_acquisitions_ctr;
2133 case MONO_PROFILER_MONITOR_FAIL:
2134 ctr = &monitor_failures_ctr;
2137 g_assert_not_reached ();
2141 ENTER_LOG (ctr, logbuffer,
2142 EVENT_SIZE /* event */ +
2143 LEB128_SIZE /* object */ +
2145 LEB128_SIZE /* count */ +
2147 LEB128_SIZE /* method */
2152 emit_event (logbuffer, (event << 4) | do_bt | TYPE_MONITOR);
2153 emit_obj (logbuffer, object);
2156 emit_bt (profiler, logbuffer, &data);
2162 thread_start (MonoProfiler *prof, uintptr_t tid)
2164 init_thread (prof, TRUE);
2166 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2167 ENTER_LOG (&thread_starts_ctr, logbuffer,
2168 EVENT_SIZE /* event */ +
2169 BYTE_SIZE /* type */ +
2170 LEB128_SIZE /* tid */
2173 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2174 emit_byte (logbuffer, TYPE_THREAD);
2175 emit_ptr (logbuffer, (void*) tid);
2182 thread_end (MonoProfiler *prof, uintptr_t tid)
2184 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2185 ENTER_LOG (&thread_ends_ctr, logbuffer,
2186 EVENT_SIZE /* event */ +
2187 BYTE_SIZE /* type */ +
2188 LEB128_SIZE /* tid */
2191 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2192 emit_byte (logbuffer, TYPE_THREAD);
2193 emit_ptr (logbuffer, (void*) tid);
2195 EXIT_LOG_EXPLICIT (NO_SEND);
2198 MonoProfilerThread *thread = PROF_TLS_GET ();
2200 thread->ended = TRUE;
2201 remove_thread (thread);
2203 PROF_TLS_SET (NULL);
2207 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2209 int len = strlen (name) + 1;
2211 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2212 ENTER_LOG (&thread_names_ctr, logbuffer,
2213 EVENT_SIZE /* event */ +
2214 BYTE_SIZE /* type */ +
2215 LEB128_SIZE /* tid */ +
2219 emit_event (logbuffer, TYPE_METADATA);
2220 emit_byte (logbuffer, TYPE_THREAD);
2221 emit_ptr (logbuffer, (void*)tid);
2222 memcpy (logbuffer->cursor, name, len);
2223 logbuffer->cursor += len;
2230 domain_loaded (MonoProfiler *prof, MonoDomain *domain, int result)
2232 if (result != MONO_PROFILE_OK)
2235 ENTER_LOG (&domain_loads_ctr, logbuffer,
2236 EVENT_SIZE /* event */ +
2237 BYTE_SIZE /* type */ +
2238 LEB128_SIZE /* domain id */
2241 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2242 emit_byte (logbuffer, TYPE_DOMAIN);
2243 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2249 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2251 ENTER_LOG (&domain_unloads_ctr, logbuffer,
2252 EVENT_SIZE /* event */ +
2253 BYTE_SIZE /* type */ +
2254 LEB128_SIZE /* domain id */
2257 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2258 emit_byte (logbuffer, TYPE_DOMAIN);
2259 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2265 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2267 int nlen = strlen (name) + 1;
2269 ENTER_LOG (&domain_names_ctr, logbuffer,
2270 EVENT_SIZE /* event */ +
2271 BYTE_SIZE /* type */ +
2272 LEB128_SIZE /* domain id */ +
2276 emit_event (logbuffer, TYPE_METADATA);
2277 emit_byte (logbuffer, TYPE_DOMAIN);
2278 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2279 memcpy (logbuffer->cursor, name, nlen);
2280 logbuffer->cursor += nlen;
2286 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2288 ENTER_LOG (&context_loads_ctr, logbuffer,
2289 EVENT_SIZE /* event */ +
2290 BYTE_SIZE /* type */ +
2291 LEB128_SIZE /* context id */ +
2292 LEB128_SIZE /* domain id */
2295 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2296 emit_byte (logbuffer, TYPE_CONTEXT);
2297 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2298 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2304 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2306 ENTER_LOG (&context_unloads_ctr, logbuffer,
2307 EVENT_SIZE /* event */ +
2308 BYTE_SIZE /* type */ +
2309 LEB128_SIZE /* context id */ +
2310 LEB128_SIZE /* domain id */
2313 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2314 emit_byte (logbuffer, TYPE_CONTEXT);
2315 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2316 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2329 MonoLockFreeQueueNode node;
2335 AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2339 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2341 SampleHit *sample = (SampleHit *) data;
2343 if (sample->count < num_frames) {
2344 int i = sample->count;
2346 sample->frames [i].method = method;
2347 sample->frames [i].domain = domain;
2348 sample->frames [i].base_address = base_address;
2349 sample->frames [i].offset = offset;
2354 return sample->count == num_frames;
2357 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2358 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2361 enqueue_sample_hit (gpointer p)
2363 SampleHit *sample = p;
2365 mono_lock_free_queue_node_unpoison (&sample->node);
2366 mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2367 mono_os_sem_post (&sample->prof->dumper_queue_sem);
2371 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
2374 * Please note: We rely on the runtime loading the profiler with
2375 * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2376 * this function (and its siblings) are resolved when the profiler is
2377 * loaded. Otherwise, we would potentially invoke the dynamic linker when
2378 * invoking runtime functions, which is not async-signal-safe.
2381 if (InterlockedRead (&in_shutdown))
2384 SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2388 * If we're out of reusable sample events and we're not allowed to
2389 * allocate more, we have no choice but to drop the event.
2391 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2394 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2395 sample->prof = profiler;
2396 mono_lock_free_queue_node_init (&sample->node, TRUE);
2398 InterlockedIncrement (&sample_allocations_ctr);
2402 mono_stack_walk_async_safe (&async_walk_stack, context, sample);
2404 sample->time = current_time ();
2405 sample->tid = thread_id ();
2408 mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2411 static uintptr_t *code_pages = 0;
2412 static int num_code_pages = 0;
2413 static int size_code_pages = 0;
2414 #define CPAGE_SHIFT (9)
2415 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2416 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2417 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2420 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2423 uintptr_t start_pos;
2424 start_pos = (page >> CPAGE_SHIFT) % hsize;
2427 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2429 } else if (!hash [i]) {
2436 } while (i != start_pos);
2437 /* should not happen */
2438 printf ("failed code page store\n");
2443 add_code_pointer (uintptr_t ip)
2446 if (num_code_pages * 2 >= size_code_pages) {
2448 uintptr_t old_size = size_code_pages;
2449 size_code_pages *= 2;
2450 if (size_code_pages == 0)
2451 size_code_pages = 16;
2452 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2453 for (i = 0; i < old_size; ++i) {
2455 add_code_page (n, size_code_pages, code_pages [i]);
2458 g_free (code_pages);
2461 num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2464 /* ELF code crashes on some systems. */
2465 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2468 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2470 int len = strlen (filename) + 1;
2472 ENTER_LOG (&sample_ubins_ctr, logbuffer,
2473 EVENT_SIZE /* event */ +
2474 LEB128_SIZE /* load address */ +
2475 LEB128_SIZE /* offset */ +
2476 LEB128_SIZE /* size */ +
2477 nlen /* file name */
2480 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2481 emit_svalue (logbuffer, load_addr);
2482 emit_uvalue (logbuffer, offset);
2483 emit_uvalue (logbuffer, size);
2484 memcpy (logbuffer->cursor, filename, len);
2485 logbuffer->cursor += len;
2487 EXIT_LOG_EXPLICIT (DO_SEND);
2492 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2494 int len = strlen (name) + 1;
2496 ENTER_LOG (&sample_usyms_ctr, logbuffer,
2497 EVENT_SIZE /* event */ +
2498 LEB128_SIZE /* value */ +
2499 LEB128_SIZE /* size */ +
2503 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2504 emit_ptr (logbuffer, (void*)value);
2505 emit_value (logbuffer, size);
2506 memcpy (logbuffer->cursor, name, len);
2507 logbuffer->cursor += len;
2509 EXIT_LOG_EXPLICIT (DO_SEND);
2512 /* ELF code crashes on some systems. */
2513 //#if defined(ELFMAG0)
2516 #if SIZEOF_VOID_P == 4
2517 #define ELF_WSIZE 32
2519 #define ELF_WSIZE 64
2522 #define ElfW(type) _ElfW (Elf, ELF_WSIZE, type)
2523 #define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
2524 #define _ElfW_1(e,w,t) e##w##t
2528 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2531 for (i = 0; i < num_symbols; ++i) {
2533 sym = strtab + symbols [i].st_name;
2534 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2536 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2537 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2542 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2549 ElfW(Shdr) *sheader;
2550 ElfW(Shdr) *shstrtabh;
2551 ElfW(Shdr) *symtabh = NULL;
2552 ElfW(Shdr) *strtabh = NULL;
2553 ElfW(Sym) *symbols = NULL;
2557 fd = open (filename, O_RDONLY);
2560 if (fstat (fd, &statb) != 0) {
2564 file_size = statb.st_size;
2565 data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2567 if (data == MAP_FAILED)
2570 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2571 header->e_ident [EI_MAG1] != ELFMAG1 ||
2572 header->e_ident [EI_MAG2] != ELFMAG2 ||
2573 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2574 munmap (data, file_size);
2577 sheader = (void*)((char*)data + header->e_shoff);
2578 shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2579 strtab = (const char*)data + shstrtabh->sh_offset;
2580 for (i = 0; i < header->e_shnum; ++i) {
2581 //printf ("section header: %d\n", sheader->sh_type);
2582 if (sheader->sh_type == SHT_SYMTAB) {
2584 strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2585 /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2588 sheader = (void*)((char*)sheader + header->e_shentsize);
2590 if (!symtabh || !strtabh) {
2591 munmap (data, file_size);
2594 strtab = (const char*)data + strtabh->sh_offset;
2595 num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2596 symbols = (void*)((char*)data + symtabh->sh_offset);
2597 dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2598 munmap (data, file_size);
2603 /* ELF code crashes on some systems. */
2604 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2607 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2609 MonoProfiler *prof = data;
2611 const char *filename;
2613 char *a = (void*)info->dlpi_addr;
2615 ElfW(Dyn) *dyn = NULL;
2616 ElfW(Sym) *symtab = NULL;
2617 ElfW(Word) *hash_table = NULL;
2618 ElfW(Ehdr) *header = NULL;
2619 const char* strtab = NULL;
2620 for (obj = prof->binary_objects; obj; obj = obj->next) {
2624 filename = info->dlpi_name;
2627 if (!info->dlpi_addr && !filename [0]) {
2628 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2634 obj = g_calloc (sizeof (BinaryObject), 1);
2635 obj->addr = (void*)info->dlpi_addr;
2636 obj->name = pstrdup (filename);
2637 obj->next = prof->binary_objects;
2638 prof->binary_objects = obj;
2639 //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2641 for (i = 0; i < info->dlpi_phnum; ++i) {
2642 //printf ("segment type %d file offset: %d, size: %d\n", info->dlpi_phdr[i].p_type, info->dlpi_phdr[i].p_offset, info->dlpi_phdr[i].p_memsz);
2643 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2644 header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2645 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2646 header->e_ident [EI_MAG1] != ELFMAG1 ||
2647 header->e_ident [EI_MAG2] != ELFMAG2 ||
2648 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2651 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);
2652 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2653 dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2656 if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2658 if (!info->dlpi_name || !info->dlpi_name[0])
2662 for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2663 if (dyn [i].d_tag == DT_SYMTAB) {
2664 if (symtab && do_debug)
2665 printf ("multiple symtabs: %d\n", i);
2666 symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2667 } else if (dyn [i].d_tag == DT_HASH) {
2668 hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2669 } else if (dyn [i].d_tag == DT_STRTAB) {
2670 strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2675 num_sym = hash_table [1];
2676 dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2681 load_binaries (MonoProfiler *prof)
2683 dl_iterate_phdr (elf_dl_callback, prof);
2688 load_binaries (MonoProfiler *prof)
2695 symbol_for (uintptr_t code)
2698 void *ip = (void*)code;
2700 if (dladdr (ip, &di)) {
2702 return di.dli_sname;
2705 names = backtrace_symbols (&ip, 1);
2707 const char* p = names [0];
2718 dump_unmanaged_coderefs (MonoProfiler *prof)
2721 const char* last_symbol;
2722 uintptr_t addr, page_end;
2724 if (load_binaries (prof))
2726 for (i = 0; i < size_code_pages; ++i) {
2728 if (!code_pages [i] || code_pages [i] & 1)
2731 addr = CPAGE_ADDR (code_pages [i]);
2732 page_end = addr + CPAGE_SIZE;
2733 code_pages [i] |= 1;
2734 /* we dump the symbols for the whole page */
2735 for (; addr < page_end; addr += 16) {
2736 sym = symbol_for (addr);
2737 if (sym && sym == last_symbol)
2742 dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2743 //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2748 typedef struct MonoCounterAgent {
2749 MonoCounter *counter;
2750 // MonoCounterAgent specific data :
2755 struct MonoCounterAgent *next;
2758 static MonoCounterAgent* counters;
2759 static int counters_index = 1;
2760 static mono_mutex_t counters_mutex;
2763 counters_add_agent (MonoCounter *counter)
2765 if (InterlockedRead (&in_shutdown))
2768 MonoCounterAgent *agent, *item;
2770 mono_os_mutex_lock (&counters_mutex);
2772 for (agent = counters; agent; agent = agent->next) {
2773 if (agent->counter == counter) {
2774 agent->value_size = 0;
2776 g_free (agent->value);
2777 agent->value = NULL;
2783 agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2784 agent->counter = counter;
2785 agent->value = NULL;
2786 agent->value_size = 0;
2787 agent->index = counters_index++;
2801 mono_os_mutex_unlock (&counters_mutex);
2805 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2807 counters_add_agent (counter);
2812 counters_init (MonoProfiler *profiler)
2814 mono_os_mutex_init (&counters_mutex);
2816 mono_counters_on_register (&counters_add_agent);
2817 mono_counters_foreach (counters_init_foreach_callback, NULL);
2821 counters_emit (MonoProfiler *profiler)
2823 MonoCounterAgent *agent;
2826 EVENT_SIZE /* event */ +
2827 LEB128_SIZE /* len */
2830 mono_os_mutex_lock (&counters_mutex);
2832 for (agent = counters; agent; agent = agent->next) {
2837 LEB128_SIZE /* section */ +
2838 strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2839 BYTE_SIZE /* type */ +
2840 BYTE_SIZE /* unit */ +
2841 BYTE_SIZE /* variance */ +
2842 LEB128_SIZE /* index */
2851 ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2853 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2854 emit_value (logbuffer, len);
2856 for (agent = counters; agent; agent = agent->next) {
2862 name = mono_counter_get_name (agent->counter);
2863 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2864 emit_string (logbuffer, name, strlen (name) + 1);
2865 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2866 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2867 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2868 emit_value (logbuffer, agent->index);
2873 EXIT_LOG_EXPLICIT (DO_SEND);
2876 mono_os_mutex_unlock (&counters_mutex);
2880 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2882 MonoCounterAgent *agent;
2883 MonoCounter *counter;
2889 counters_emit (profiler);
2892 buffer = g_calloc (1, buffer_size);
2894 mono_os_mutex_lock (&counters_mutex);
2897 EVENT_SIZE /* event */
2900 for (agent = counters; agent; agent = agent->next) {
2902 LEB128_SIZE /* index */ +
2903 BYTE_SIZE /* type */ +
2904 mono_counter_get_size (agent->counter) /* value */
2909 LEB128_SIZE /* stop marker */
2912 ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2914 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2916 for (agent = counters; agent; agent = agent->next) {
2919 counter = agent->counter;
2921 size = mono_counter_get_size (counter);
2923 if (size > buffer_size) {
2925 buffer = g_realloc (buffer, buffer_size);
2928 memset (buffer, 0, buffer_size);
2930 g_assert (mono_counters_sample (counter, buffer, size));
2932 type = mono_counter_get_type (counter);
2934 if (!agent->value) {
2935 agent->value = g_calloc (1, size);
2936 agent->value_size = size;
2938 if (type == MONO_COUNTER_STRING) {
2939 if (strcmp (agent->value, buffer) == 0)
2942 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2947 emit_uvalue (logbuffer, agent->index);
2948 emit_byte (logbuffer, type);
2950 case MONO_COUNTER_INT:
2951 #if SIZEOF_VOID_P == 4
2952 case MONO_COUNTER_WORD:
2954 emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2956 case MONO_COUNTER_UINT:
2957 emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2959 case MONO_COUNTER_TIME_INTERVAL:
2960 case MONO_COUNTER_LONG:
2961 #if SIZEOF_VOID_P == 8
2962 case MONO_COUNTER_WORD:
2964 emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2966 case MONO_COUNTER_ULONG:
2967 emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2969 case MONO_COUNTER_DOUBLE:
2970 emit_double (logbuffer, *(double*)buffer);
2972 case MONO_COUNTER_STRING:
2974 emit_byte (logbuffer, 0);
2976 emit_byte (logbuffer, 1);
2977 emit_string (logbuffer, (char*)buffer, size);
2981 g_assert_not_reached ();
2984 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
2985 agent->value = g_realloc (agent->value, size);
2986 agent->value_size = size;
2990 memcpy (agent->value, buffer, size);
2994 emit_value (logbuffer, 0);
2996 EXIT_LOG_EXPLICIT (DO_SEND);
2998 mono_os_mutex_unlock (&counters_mutex);
3001 typedef struct _PerfCounterAgent PerfCounterAgent;
3002 struct _PerfCounterAgent {
3003 PerfCounterAgent *next;
3005 char *category_name;
3014 static PerfCounterAgent *perfcounters = NULL;
3017 perfcounters_emit (MonoProfiler *profiler)
3019 PerfCounterAgent *pcagent;
3022 EVENT_SIZE /* event */ +
3023 LEB128_SIZE /* len */
3026 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3027 if (pcagent->emitted)
3031 LEB128_SIZE /* section */ +
3032 strlen (pcagent->category_name) + 1 /* category name */ +
3033 strlen (pcagent->name) + 1 /* name */ +
3034 BYTE_SIZE /* type */ +
3035 BYTE_SIZE /* unit */ +
3036 BYTE_SIZE /* variance */ +
3037 LEB128_SIZE /* index */
3046 ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3048 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3049 emit_value (logbuffer, len);
3051 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3052 if (pcagent->emitted)
3055 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3056 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3057 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3058 emit_byte (logbuffer, MONO_COUNTER_LONG);
3059 emit_byte (logbuffer, MONO_COUNTER_RAW);
3060 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3061 emit_value (logbuffer, pcagent->index);
3063 pcagent->emitted = 1;
3066 EXIT_LOG_EXPLICIT (DO_SEND);
3070 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3072 PerfCounterAgent *pcagent;
3074 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3075 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3077 if (pcagent->value == value)
3080 pcagent->value = value;
3081 pcagent->updated = 1;
3082 pcagent->deleted = 0;
3086 pcagent = g_new0 (PerfCounterAgent, 1);
3087 pcagent->next = perfcounters;
3088 pcagent->index = counters_index++;
3089 pcagent->category_name = g_strdup (category_name);
3090 pcagent->name = g_strdup (name);
3091 pcagent->type = (int) type;
3092 pcagent->value = value;
3093 pcagent->emitted = 0;
3094 pcagent->updated = 1;
3095 pcagent->deleted = 0;
3097 perfcounters = pcagent;
3103 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3105 PerfCounterAgent *pcagent;
3109 mono_os_mutex_lock (&counters_mutex);
3111 /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3112 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3113 pcagent->deleted = 1;
3115 mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3117 perfcounters_emit (profiler);
3120 EVENT_SIZE /* event */
3123 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3124 if (pcagent->deleted || !pcagent->updated)
3128 LEB128_SIZE /* index */ +
3129 BYTE_SIZE /* type */ +
3130 LEB128_SIZE /* value */
3140 LEB128_SIZE /* stop marker */
3143 ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3145 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3147 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3148 if (pcagent->deleted || !pcagent->updated)
3150 emit_uvalue (logbuffer, pcagent->index);
3151 emit_byte (logbuffer, MONO_COUNTER_LONG);
3152 emit_svalue (logbuffer, pcagent->value);
3154 pcagent->updated = 0;
3157 emit_value (logbuffer, 0);
3159 EXIT_LOG_EXPLICIT (DO_SEND);
3162 mono_os_mutex_unlock (&counters_mutex);
3166 counters_and_perfcounters_sample (MonoProfiler *prof)
3168 uint64_t now = current_time ();
3170 counters_sample (prof, now);
3171 perfcounters_sample (prof, now);
3174 #define COVERAGE_DEBUG(x) if (debug_coverage) {x}
3175 static mono_mutex_t coverage_mutex;
3176 static MonoConcurrentHashTable *coverage_methods = NULL;
3177 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3178 static MonoConcurrentHashTable *coverage_classes = NULL;
3180 static MonoConcurrentHashTable *filtered_classes = NULL;
3181 static MonoConcurrentHashTable *entered_methods = NULL;
3182 static MonoConcurrentHashTable *image_to_methods = NULL;
3183 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3184 static gboolean coverage_initialized = FALSE;
3186 static GPtrArray *coverage_data = NULL;
3187 static int previous_offset = 0;
3190 MonoLockFreeQueueNode node;
3203 free_coverage_entry (gpointer data, gpointer userdata)
3205 CoverageEntry *entry = (CoverageEntry *)data;
3206 g_free (entry->filename);
3211 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfileCoverageEntry *entry)
3213 int offset = entry->iloffset - previous_offset;
3214 CoverageEntry *e = g_new (CoverageEntry, 1);
3216 previous_offset = entry->iloffset;
3219 e->counter = entry->counter;
3220 e->filename = g_strdup(entry->filename ? entry->filename : "");
3221 e->line = entry->line;
3222 e->column = entry->col;
3224 g_ptr_array_add (coverage_data, e);
3228 parse_generic_type_names(char *name)
3230 char *new_name, *ret;
3231 int within_generic_declaration = 0, generic_members = 1;
3233 if (name == NULL || *name == '\0')
3234 return g_strdup ("");
3236 if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3242 within_generic_declaration = 1;
3246 within_generic_declaration = 0;
3248 if (*(name - 1) != '<') {
3250 *new_name++ = '0' + generic_members;
3252 memcpy (new_name, "<>", 8);
3256 generic_members = 0;
3264 if (!within_generic_declaration)
3265 *new_name++ = *name;
3274 static int method_id;
3276 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3278 MonoMethod *method = (MonoMethod *)value;
3279 MonoProfiler *prof = (MonoProfiler *)userdata;
3283 const char *image_name, *method_name, *sig, *first_filename;
3286 previous_offset = 0;
3287 coverage_data = g_ptr_array_new ();
3289 mono_profiler_coverage_get (prof, method, obtain_coverage_for_method);
3291 klass = mono_method_get_class (method);
3292 image = mono_class_get_image (klass);
3293 image_name = mono_image_get_name (image);
3295 sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3296 class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3297 method_name = mono_method_get_name (method);
3299 if (coverage_data->len != 0) {
3300 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3301 first_filename = entry->filename ? entry->filename : "";
3303 first_filename = "";
3305 image_name = image_name ? image_name : "";
3306 sig = sig ? sig : "";
3307 method_name = method_name ? method_name : "";
3309 ENTER_LOG (&coverage_methods_ctr, logbuffer,
3310 EVENT_SIZE /* event */ +
3311 strlen (image_name) + 1 /* image name */ +
3312 strlen (class_name) + 1 /* class name */ +
3313 strlen (method_name) + 1 /* method name */ +
3314 strlen (sig) + 1 /* signature */ +
3315 strlen (first_filename) + 1 /* first file name */ +
3316 LEB128_SIZE /* token */ +
3317 LEB128_SIZE /* method id */ +
3318 LEB128_SIZE /* entries */
3321 emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3322 emit_string (logbuffer, image_name, strlen (image_name) + 1);
3323 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3324 emit_string (logbuffer, method_name, strlen (method_name) + 1);
3325 emit_string (logbuffer, sig, strlen (sig) + 1);
3326 emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3328 emit_uvalue (logbuffer, mono_method_get_token (method));
3329 emit_uvalue (logbuffer, method_id);
3330 emit_value (logbuffer, coverage_data->len);
3332 EXIT_LOG_EXPLICIT (DO_SEND);
3334 for (i = 0; i < coverage_data->len; i++) {
3335 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3337 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3338 EVENT_SIZE /* event */ +
3339 LEB128_SIZE /* method id */ +
3340 LEB128_SIZE /* offset */ +
3341 LEB128_SIZE /* counter */ +
3342 LEB128_SIZE /* line */ +
3343 LEB128_SIZE /* column */
3346 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3347 emit_uvalue (logbuffer, method_id);
3348 emit_uvalue (logbuffer, entry->offset);
3349 emit_uvalue (logbuffer, entry->counter);
3350 emit_uvalue (logbuffer, entry->line);
3351 emit_uvalue (logbuffer, entry->column);
3353 EXIT_LOG_EXPLICIT (DO_SEND);
3358 g_free (class_name);
3360 g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3361 g_ptr_array_free (coverage_data, TRUE);
3362 coverage_data = NULL;
3365 /* This empties the queue */
3367 count_queue (MonoLockFreeQueue *queue)
3369 MonoLockFreeQueueNode *node;
3372 while ((node = mono_lock_free_queue_dequeue (queue))) {
3374 mono_thread_hazardous_try_free (node, g_free);
3381 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3383 MonoClass *klass = (MonoClass *)key;
3384 MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3387 const char *assembly_name;
3388 int number_of_methods, partially_covered;
3389 guint fully_covered;
3391 image = mono_class_get_image (klass);
3392 assembly_name = mono_image_get_name (image);
3393 class_name = mono_type_get_name (mono_class_get_type (klass));
3395 assembly_name = assembly_name ? assembly_name : "";
3396 number_of_methods = mono_class_num_methods (klass);
3397 fully_covered = count_queue (class_methods);
3398 /* We don't handle partial covered yet */
3399 partially_covered = 0;
3401 ENTER_LOG (&coverage_classes_ctr, logbuffer,
3402 EVENT_SIZE /* event */ +
3403 strlen (assembly_name) + 1 /* assembly name */ +
3404 strlen (class_name) + 1 /* class name */ +
3405 LEB128_SIZE /* no. methods */ +
3406 LEB128_SIZE /* fully covered */ +
3407 LEB128_SIZE /* partially covered */
3410 emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3411 emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3412 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3413 emit_uvalue (logbuffer, number_of_methods);
3414 emit_uvalue (logbuffer, fully_covered);
3415 emit_uvalue (logbuffer, partially_covered);
3417 EXIT_LOG_EXPLICIT (DO_SEND);
3419 g_free (class_name);
3423 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3425 MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3427 *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3429 *fully_covered = count_queue (image_methods);
3433 // FIXME: We don't handle partially covered yet.
3434 *partially_covered = 0;
3438 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3440 MonoAssembly *assembly = (MonoAssembly *)value;
3441 MonoImage *image = mono_assembly_get_image (assembly);
3442 const char *name, *guid, *filename;
3443 int number_of_methods = 0, partially_covered = 0;
3444 guint fully_covered = 0;
3446 name = mono_image_get_name (image);
3447 guid = mono_image_get_guid (image);
3448 filename = mono_image_get_filename (image);
3450 name = name ? name : "";
3451 guid = guid ? guid : "";
3452 filename = filename ? filename : "";
3454 get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3456 ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3457 EVENT_SIZE /* event */ +
3458 strlen (name) + 1 /* name */ +
3459 strlen (guid) + 1 /* guid */ +
3460 strlen (filename) + 1 /* file name */ +
3461 LEB128_SIZE /* no. methods */ +
3462 LEB128_SIZE /* fully covered */ +
3463 LEB128_SIZE /* partially covered */
3466 emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3467 emit_string (logbuffer, name, strlen (name) + 1);
3468 emit_string (logbuffer, guid, strlen (guid) + 1);
3469 emit_string (logbuffer, filename, strlen (filename) + 1);
3470 emit_uvalue (logbuffer, number_of_methods);
3471 emit_uvalue (logbuffer, fully_covered);
3472 emit_uvalue (logbuffer, partially_covered);
3474 EXIT_LOG_EXPLICIT (DO_SEND);
3478 dump_coverage (MonoProfiler *prof)
3480 if (!coverage_initialized)
3483 COVERAGE_DEBUG(fprintf (stderr, "Coverage: Started dump\n");)
3486 mono_os_mutex_lock (&coverage_mutex);
3487 mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3488 mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3489 mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3490 mono_os_mutex_unlock (&coverage_mutex);
3492 COVERAGE_DEBUG(fprintf (stderr, "Coverage: Finished dump\n");)
3496 process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method)
3501 if (!coverage_initialized)
3504 klass = mono_method_get_class (method);
3505 image = mono_class_get_image (klass);
3507 if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)))
3510 mono_os_mutex_lock (&coverage_mutex);
3511 mono_conc_hashtable_insert (entered_methods, method, method);
3512 mono_os_mutex_unlock (&coverage_mutex);
3515 static MonoLockFreeQueueNode *
3516 create_method_node (MonoMethod *method)
3518 MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3519 mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3520 node->method = method;
3522 return (MonoLockFreeQueueNode *) node;
3526 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3531 MonoAssembly *assembly;
3532 MonoMethodHeader *header;
3533 guint32 iflags, flags, code_size;
3534 char *fqn, *classname;
3535 gboolean has_positive, found;
3536 MonoLockFreeQueue *image_methods, *class_methods;
3537 MonoLockFreeQueueNode *node;
3539 g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3541 COVERAGE_DEBUG(fprintf (stderr, "Coverage filter for %s\n", mono_method_get_name (method));)
3543 flags = mono_method_get_flags (method, &iflags);
3544 if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3545 (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/)) {
3546 COVERAGE_DEBUG(fprintf (stderr, " Internal call or pinvoke - ignoring\n");)
3550 // Don't need to do anything else if we're already tracking this method
3551 if (mono_conc_hashtable_lookup (coverage_methods, method)) {
3552 COVERAGE_DEBUG(fprintf (stderr, " Already tracking\n");)
3556 klass = mono_method_get_class (method);
3557 image = mono_class_get_image (klass);
3559 // Don't handle coverage for the core assemblies
3560 if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3563 if (prof->coverage_filters) {
3564 /* Check already filtered classes first */
3565 if (mono_conc_hashtable_lookup (filtered_classes, klass)) {
3566 COVERAGE_DEBUG(fprintf (stderr, " Already filtered\n");)
3570 classname = mono_type_get_name (mono_class_get_type (klass));
3572 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3574 COVERAGE_DEBUG(fprintf (stderr, " Looking for %s in filter\n", fqn);)
3575 // Check positive filters first
3576 has_positive = FALSE;
3578 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3579 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3581 if (filter [0] == '+') {
3582 filter = &filter [1];
3584 COVERAGE_DEBUG(fprintf (stderr, " Checking against +%s ...", filter);)
3586 if (strstr (fqn, filter) != NULL) {
3587 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3590 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3592 has_positive = TRUE;
3596 if (has_positive && !found) {
3597 COVERAGE_DEBUG(fprintf (stderr, " Positive match was not found\n");)
3599 mono_os_mutex_lock (&coverage_mutex);
3600 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3601 mono_os_mutex_unlock (&coverage_mutex);
3608 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3609 // FIXME: Is substring search sufficient?
3610 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3611 if (filter [0] == '+')
3615 filter = &filter [1];
3616 COVERAGE_DEBUG(fprintf (stderr, " Checking against -%s ...", filter);)
3618 if (strstr (fqn, filter) != NULL) {
3619 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3621 mono_os_mutex_lock (&coverage_mutex);
3622 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3623 mono_os_mutex_unlock (&coverage_mutex);
3629 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3637 COVERAGE_DEBUG(fprintf (stderr, " Handling coverage for %s\n", mono_method_get_name (method));)
3638 header = mono_method_get_header_checked (method, &error);
3639 mono_error_cleanup (&error);
3641 mono_method_header_get_code (header, &code_size, NULL);
3643 assembly = mono_image_get_assembly (image);
3645 // Need to keep the assemblies around for as long as they are kept in the hashtable
3646 // Nunit, for example, has a habit of unloading them before the coverage statistics are
3647 // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3648 mono_assembly_addref (assembly);
3650 mono_os_mutex_lock (&coverage_mutex);
3651 mono_conc_hashtable_insert (coverage_methods, method, method);
3652 mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3653 mono_os_mutex_unlock (&coverage_mutex);
3655 image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3657 if (image_methods == NULL) {
3658 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3659 mono_lock_free_queue_init (image_methods);
3660 mono_os_mutex_lock (&coverage_mutex);
3661 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3662 mono_os_mutex_unlock (&coverage_mutex);
3665 node = create_method_node (method);
3666 mono_lock_free_queue_enqueue (image_methods, node);
3668 class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3670 if (class_methods == NULL) {
3671 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3672 mono_lock_free_queue_init (class_methods);
3673 mono_os_mutex_lock (&coverage_mutex);
3674 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3675 mono_os_mutex_unlock (&coverage_mutex);
3678 node = create_method_node (method);
3679 mono_lock_free_queue_enqueue (class_methods, node);
3684 #define LINE_BUFFER_SIZE 4096
3685 /* Max file limit of 128KB */
3686 #define MAX_FILE_SIZE 128 * 1024
3688 get_file_content (FILE *stream)
3693 int res, offset = 0;
3695 res = fseek (stream, 0, SEEK_END);
3699 filesize = ftell (stream);
3703 res = fseek (stream, 0, SEEK_SET);
3707 if (filesize > MAX_FILE_SIZE)
3710 buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3711 while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3712 offset += bytes_read;
3714 /* NULL terminate our buffer */
3715 buffer[filesize] = '\0';
3720 get_next_line (char *contents, char **next_start)
3724 if (p == NULL || *p == '\0') {
3729 while (*p != '\n' && *p != '\0')
3734 *next_start = p + 1;
3742 init_suppressed_assemblies (void)
3748 suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3749 sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3750 if (sa_file == NULL)
3753 /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3754 content = get_file_content (sa_file);
3755 if (content == NULL) {
3756 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3759 while ((line = get_next_line (content, &content))) {
3760 line = g_strchomp (g_strchug (line));
3761 /* No locking needed as we're doing initialization */
3762 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3769 parse_cov_filter_file (GPtrArray *filters, const char *file)
3772 char *line, *content;
3774 filter_file = fopen (file, "r");
3775 if (filter_file == NULL) {
3776 fprintf (stderr, "Unable to open %s\n", file);
3780 /* Don't need to free content as it is referred to by the lines stored in @filters */
3781 content = get_file_content (filter_file);
3782 if (content == NULL)
3783 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3785 while ((line = get_next_line (content, &content)))
3786 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3788 fclose (filter_file);
3792 coverage_init (MonoProfiler *prof)
3794 g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3796 COVERAGE_DEBUG(fprintf (stderr, "Coverage initialized\n");)
3798 mono_os_mutex_init (&coverage_mutex);
3799 coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3800 coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3801 coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3802 filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3803 entered_methods = mono_conc_hashtable_new (NULL, NULL);
3804 image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3805 init_suppressed_assemblies ();
3807 coverage_initialized = TRUE;
3811 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3813 MonoAssembly *assembly = (MonoAssembly *)value;
3814 mono_assembly_close (assembly);
3818 free_sample_hit (gpointer p)
3820 mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3824 cleanup_reusable_samples (MonoProfiler *prof)
3828 while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3829 mono_thread_hazardous_try_free (sample, free_sample_hit);
3833 log_shutdown (MonoProfiler *prof)
3835 InterlockedWrite (&in_shutdown, 1);
3838 counters_and_perfcounters_sample (prof);
3840 dump_coverage (prof);
3844 if (write (prof->pipes [1], &c, 1) != 1) {
3845 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3849 mono_native_thread_join (prof->helper_thread);
3851 mono_os_mutex_destroy (&counters_mutex);
3853 MonoCounterAgent *mc_next;
3855 for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3856 mc_next = cur->next;
3860 PerfCounterAgent *pc_next;
3862 for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3863 pc_next = cur->next;
3868 * Ensure that we empty the LLS completely, even if some nodes are
3869 * not immediately removed upon calling mono_lls_remove (), by
3870 * iterating until the head is NULL.
3872 while (profiler_thread_list.head) {
3873 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3874 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3876 remove_thread (thread);
3877 } MONO_LLS_FOREACH_SAFE_END
3881 * Ensure that all threads have been freed, so that we don't miss any
3882 * buffers when we shut down the writer thread below.
3884 mono_thread_hazardous_try_free_all ();
3886 InterlockedWrite (&prof->run_dumper_thread, 0);
3887 mono_os_sem_post (&prof->dumper_queue_sem);
3888 mono_native_thread_join (prof->dumper_thread);
3889 mono_os_sem_destroy (&prof->dumper_queue_sem);
3891 InterlockedWrite (&prof->run_writer_thread, 0);
3892 mono_os_sem_post (&prof->writer_queue_sem);
3893 mono_native_thread_join (prof->writer_thread);
3894 mono_os_sem_destroy (&prof->writer_queue_sem);
3897 * Free all writer queue entries, and ensure that all sample hits will be
3898 * added to the sample reuse queue.
3900 mono_thread_hazardous_try_free_all ();
3902 cleanup_reusable_samples (prof);
3905 * Finally, make sure that all sample hits are freed. This should cover all
3906 * hazardous data from the profiler. We can now be sure that the runtime
3907 * won't later invoke free functions in the profiler library after it has
3910 mono_thread_hazardous_try_free_all ();
3912 g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why is the reader count still non-zero?");
3913 g_assert (!InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why does someone still hold the exclusive lock?");
3915 #if defined (HAVE_SYS_ZLIB)
3917 gzclose (prof->gzfile);
3919 if (prof->pipe_output)
3920 pclose (prof->file);
3922 fclose (prof->file);
3924 mono_conc_hashtable_destroy (prof->method_table);
3925 mono_os_mutex_destroy (&prof->method_table_mutex);
3927 if (coverage_initialized) {
3928 mono_os_mutex_lock (&coverage_mutex);
3929 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3930 mono_os_mutex_unlock (&coverage_mutex);
3932 mono_conc_hashtable_destroy (coverage_methods);
3933 mono_conc_hashtable_destroy (coverage_assemblies);
3934 mono_conc_hashtable_destroy (coverage_classes);
3935 mono_conc_hashtable_destroy (filtered_classes);
3937 mono_conc_hashtable_destroy (entered_methods);
3938 mono_conc_hashtable_destroy (image_to_methods);
3939 mono_conc_hashtable_destroy (suppressed_assemblies);
3940 mono_os_mutex_destroy (&coverage_mutex);
3945 g_free (prof->args);
3950 new_filename (const char* filename)
3952 time_t t = time (NULL);
3953 int pid = process_id ();
3958 int count_dates = 0;
3962 for (p = filename; *p; p++) {
3973 if (!count_dates && !count_pids)
3974 return pstrdup (filename);
3975 snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3977 snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3978 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3979 s_date = strlen (time_buf);
3980 s_pid = strlen (pid_buf);
3981 d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3982 for (p = filename; *p; p++) {
3989 strcpy (d, time_buf);
3992 } else if (*p == 'p') {
3993 strcpy (d, pid_buf);
3996 } else if (*p == '%') {
4009 add_to_fd_set (fd_set *set, int fd, int *max_fd)
4012 * This should only trigger for the basic FDs (server socket, pipes) at
4013 * startup if for some mysterious reason they're too large. In this case,
4014 * the profiler really can't function, and we're better off printing an
4015 * error and exiting.
4017 if (fd >= FD_SETSIZE) {
4018 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4029 helper_thread (void *arg)
4031 MonoProfiler *prof = (MonoProfiler *) arg;
4033 mono_threads_attach_tools_thread ();
4034 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4036 MonoProfilerThread *thread = init_thread (prof, FALSE);
4038 GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4046 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4047 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4049 for (gint i = 0; i < command_sockets->len; i++)
4050 add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4052 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4054 // Sleep for 1sec or until a file descriptor has data.
4055 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4059 fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4064 counters_and_perfcounters_sample (prof);
4066 buffer_lock_excl ();
4068 sync_point (SYNC_POINT_PERIODIC);
4070 buffer_unlock_excl ();
4072 // Are we shutting down?
4073 if (FD_ISSET (prof->pipes [0], &rfds)) {
4075 read (prof->pipes [0], &c, 1);
4079 for (gint i = 0; i < command_sockets->len; i++) {
4080 int fd = g_array_index (command_sockets, int, i);
4082 if (!FD_ISSET (fd, &rfds))
4086 int len = read (fd, buf, sizeof (buf) - 1);
4092 // The other end disconnected.
4093 g_array_remove_index (command_sockets, i);
4101 if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4102 // Rely on the finalization callback triggering a GC.
4103 heapshot_requested = 1;
4104 mono_gc_finalize_notify ();
4108 if (FD_ISSET (prof->server_socket, &rfds)) {
4109 int fd = accept (prof->server_socket, NULL, NULL);
4112 if (fd >= FD_SETSIZE)
4115 g_array_append_val (command_sockets, fd);
4120 for (gint i = 0; i < command_sockets->len; i++)
4121 close (g_array_index (command_sockets, int, i));
4123 g_array_free (command_sockets, TRUE);
4125 send_log_unsafe (FALSE);
4126 deinit_thread (thread);
4128 mono_thread_info_detach ();
4134 start_helper_thread (MonoProfiler* prof)
4136 if (pipe (prof->pipes) == -1) {
4137 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4141 prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4143 if (prof->server_socket == -1) {
4144 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4148 struct sockaddr_in server_address;
4150 memset (&server_address, 0, sizeof (server_address));
4151 server_address.sin_family = AF_INET;
4152 server_address.sin_addr.s_addr = INADDR_ANY;
4153 server_address.sin_port = htons (prof->command_port);
4155 if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4156 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4157 close (prof->server_socket);
4161 if (listen (prof->server_socket, 1) == -1) {
4162 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4163 close (prof->server_socket);
4167 socklen_t slen = sizeof (server_address);
4169 if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4170 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4171 close (prof->server_socket);
4175 prof->command_port = ntohs (server_address.sin_port);
4177 if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4178 fprintf (stderr, "Could not start helper thread\n");
4179 close (prof->server_socket);
4185 free_writer_entry (gpointer p)
4187 mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4191 handle_writer_queue_entry (MonoProfiler *prof)
4193 WriterQueueEntry *entry;
4195 if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4196 if (!entry->methods)
4199 gboolean wrote_methods = FALSE;
4202 * Encode the method events in a temporary log buffer that we
4203 * flush to disk before the main buffer, ensuring that all
4204 * methods have metadata emitted before they're referenced.
4206 * We use a 'proper' thread-local buffer for this as opposed
4207 * to allocating and freeing a buffer by hand because the call
4208 * to mono_method_full_name () below may trigger class load
4209 * events when it retrieves the signature of the method. So a
4210 * thread-local buffer needs to exist when such events occur.
4212 for (guint i = 0; i < entry->methods->len; i++) {
4213 MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4215 if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4216 goto free_info; // This method already has metadata emitted.
4219 * Other threads use this hash table to get a general
4220 * idea of whether a method has already been emitted to
4221 * the stream. Due to the way we add to this table, it
4222 * can easily happen that multiple threads queue up the
4223 * same methods, but that's OK since eventually all
4224 * methods will be in this table and the thread-local
4225 * method lists will just be empty for the rest of the
4228 mono_os_mutex_lock (&prof->method_table_mutex);
4229 mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4230 mono_os_mutex_unlock (&prof->method_table_mutex);
4232 char *name = mono_method_full_name (info->method, 1);
4233 int nlen = strlen (name) + 1;
4234 void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4235 int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4237 ENTER_LOG (&method_jits_ctr, logbuffer,
4238 EVENT_SIZE /* event */ +
4239 LEB128_SIZE /* method */ +
4240 LEB128_SIZE /* start */ +
4241 LEB128_SIZE /* size */ +
4245 emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4246 emit_method_inner (logbuffer, info->method);
4247 emit_ptr (logbuffer, cstart);
4248 emit_value (logbuffer, csize);
4250 memcpy (logbuffer->cursor, name, nlen);
4251 logbuffer->cursor += nlen;
4253 EXIT_LOG_EXPLICIT (NO_SEND);
4257 wrote_methods = TRUE;
4263 g_ptr_array_free (entry->methods, TRUE);
4265 if (wrote_methods) {
4266 dump_buffer_threadless (prof, PROF_TLS_GET ()->buffer);
4267 init_buffer_state (PROF_TLS_GET ());
4271 dump_buffer (prof, entry->buffer);
4273 mono_thread_hazardous_try_free (entry, free_writer_entry);
4282 writer_thread (void *arg)
4284 MonoProfiler *prof = (MonoProfiler *)arg;
4286 mono_threads_attach_tools_thread ();
4287 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4291 MonoProfilerThread *thread = init_thread (prof, FALSE);
4293 while (InterlockedRead (&prof->run_writer_thread)) {
4294 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4295 handle_writer_queue_entry (prof);
4298 /* Drain any remaining entries on shutdown. */
4299 while (handle_writer_queue_entry (prof));
4301 free_buffer (thread->buffer, thread->buffer->size);
4302 deinit_thread (thread);
4304 mono_thread_info_detach ();
4310 start_writer_thread (MonoProfiler* prof)
4312 InterlockedWrite (&prof->run_writer_thread, 1);
4314 if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4315 fprintf (stderr, "Could not start writer thread\n");
4321 reuse_sample_hit (gpointer p)
4323 SampleHit *sample = p;
4325 mono_lock_free_queue_node_unpoison (&sample->node);
4326 mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4330 handle_dumper_queue_entry (MonoProfiler *prof)
4334 if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4335 for (int i = 0; i < sample->count; ++i) {
4336 MonoMethod *method = sample->frames [i].method;
4337 MonoDomain *domain = sample->frames [i].domain;
4338 void *address = sample->frames [i].base_address;
4341 g_assert (domain && "What happened to the domain pointer?");
4342 g_assert (address && "What happened to the instruction pointer?");
4344 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4347 sample->frames [i].method = mono_jit_info_get_method (ji);
4351 ENTER_LOG (&sample_hits_ctr, logbuffer,
4352 EVENT_SIZE /* event */ +
4353 BYTE_SIZE /* type */ +
4354 LEB128_SIZE /* tid */ +
4355 LEB128_SIZE /* count */ +
4357 LEB128_SIZE /* ip */
4359 LEB128_SIZE /* managed count */ +
4361 LEB128_SIZE /* method */
4365 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4366 emit_byte (logbuffer, SAMPLE_CYCLES);
4367 emit_ptr (logbuffer, (void *) sample->tid);
4368 emit_value (logbuffer, 1);
4370 // TODO: Actual native unwinding.
4371 for (int i = 0; i < 1; ++i) {
4372 emit_ptr (logbuffer, sample->ip);
4373 add_code_pointer ((uintptr_t) sample->ip);
4376 /* new in data version 6 */
4377 emit_uvalue (logbuffer, sample->count);
4379 for (int i = 0; i < sample->count; ++i)
4380 emit_method (logbuffer, sample->frames [i].method);
4382 EXIT_LOG_EXPLICIT (DO_SEND);
4384 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4386 dump_unmanaged_coderefs (prof);
4393 dumper_thread (void *arg)
4395 MonoProfiler *prof = (MonoProfiler *)arg;
4397 mono_threads_attach_tools_thread ();
4398 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4400 MonoProfilerThread *thread = init_thread (prof, FALSE);
4402 while (InterlockedRead (&prof->run_dumper_thread)) {
4403 mono_os_sem_wait (&prof->dumper_queue_sem, MONO_SEM_FLAGS_NONE);
4404 handle_dumper_queue_entry (prof);
4407 /* Drain any remaining entries on shutdown. */
4408 while (handle_dumper_queue_entry (prof));
4410 send_log_unsafe (FALSE);
4411 deinit_thread (thread);
4413 mono_thread_info_detach ();
4419 start_dumper_thread (MonoProfiler* prof)
4421 InterlockedWrite (&prof->run_dumper_thread, 1);
4423 if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4424 fprintf (stderr, "Could not start dumper thread\n");
4430 register_counter (const char *name, gint32 *counter)
4432 mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4436 runtime_initialized (MonoProfiler *profiler)
4438 InterlockedWrite (&runtime_inited, 1);
4440 register_counter ("Sample events allocated", &sample_allocations_ctr);
4441 register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4443 register_counter ("Event: Sync points", &sync_points_ctr);
4444 register_counter ("Event: Heap objects", &heap_objects_ctr);
4445 register_counter ("Event: Heap starts", &heap_starts_ctr);
4446 register_counter ("Event: Heap ends", &heap_ends_ctr);
4447 register_counter ("Event: Heap roots", &heap_roots_ctr);
4448 register_counter ("Event: GC events", &gc_events_ctr);
4449 register_counter ("Event: GC resizes", &gc_resizes_ctr);
4450 register_counter ("Event: GC allocations", &gc_allocs_ctr);
4451 register_counter ("Event: GC moves", &gc_moves_ctr);
4452 register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4453 register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4454 register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4455 register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4456 register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4457 register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4458 register_counter ("Event: Image loads", &image_loads_ctr);
4459 register_counter ("Event: Image unloads", &image_unloads_ctr);
4460 register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4461 register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4462 register_counter ("Event: Class loads", &class_loads_ctr);
4463 register_counter ("Event: Class unloads", &class_unloads_ctr);
4464 register_counter ("Event: Method entries", &method_entries_ctr);
4465 register_counter ("Event: Method exits", &method_exits_ctr);
4466 register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4467 register_counter ("Event: Method JITs", &method_jits_ctr);
4468 register_counter ("Event: Code buffers", &code_buffers_ctr);
4469 register_counter ("Event: Exception throws", &exception_throws_ctr);
4470 register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4471 register_counter ("Event: Monitor contentions", &monitor_contentions_ctr);
4472 register_counter ("Event: Monitor acquisitions", &monitor_acquisitions_ctr);
4473 register_counter ("Event: Monitor failures", &monitor_failures_ctr);
4474 register_counter ("Event: Thread starts", &thread_starts_ctr);
4475 register_counter ("Event: Thread ends", &thread_ends_ctr);
4476 register_counter ("Event: Thread names", &thread_names_ctr);
4477 register_counter ("Event: Domain loads", &domain_loads_ctr);
4478 register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4479 register_counter ("Event: Domain names", &domain_names_ctr);
4480 register_counter ("Event: Context loads", &context_loads_ctr);
4481 register_counter ("Event: Context unloads", &context_unloads_ctr);
4482 register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4483 register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4484 register_counter ("Event: Sample hits", &sample_hits_ctr);
4485 register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4486 register_counter ("Event: Counter samples", &counter_samples_ctr);
4487 register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4488 register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4489 register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4490 register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4491 register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4492 register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4494 counters_init (profiler);
4497 * We must start the helper thread before the writer thread. This is
4498 * because the helper thread sets up the command port which is written to
4499 * the log header by the writer thread.
4501 start_helper_thread (profiler);
4502 start_writer_thread (profiler);
4503 start_dumper_thread (profiler);
4506 static MonoProfiler*
4507 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4511 int force_delete = 0;
4512 prof = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4514 prof->args = pstrdup (args);
4515 prof->command_port = command_port;
4516 if (filename && *filename == '-') {
4519 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4522 //If filename begin with +, append the pid at the end
4523 if (filename && *filename == '+')
4524 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4529 filename = "|mprof-report -";
4531 filename = "output.mlpd";
4532 nf = (char*)filename;
4534 nf = new_filename (filename);
4536 int s = strlen (nf) + 32;
4537 char *p = (char *) g_malloc (s);
4538 snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4544 prof->file = popen (nf + 1, "w");
4545 prof->pipe_output = 1;
4546 } else if (*nf == '#') {
4547 int fd = strtol (nf + 1, NULL, 10);
4548 prof->file = fdopen (fd, "a");
4552 prof->file = fopen (nf, "wb");
4555 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4559 #if defined (HAVE_SYS_ZLIB)
4561 prof->gzfile = gzdopen (fileno (prof->file), "wb");
4565 * If you hit this assert while increasing MAX_FRAMES, you need to increase
4566 * SAMPLE_BLOCK_SIZE as well.
4568 g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4570 // FIXME: We should free this stuff too.
4571 mono_lock_free_allocator_init_size_class (&prof->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4572 mono_lock_free_allocator_init_allocator (&prof->sample_allocator, &prof->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4574 mono_lock_free_queue_init (&prof->sample_reuse_queue);
4576 g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4578 // FIXME: We should free this stuff too.
4579 mono_lock_free_allocator_init_size_class (&prof->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4580 mono_lock_free_allocator_init_allocator (&prof->writer_entry_allocator, &prof->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4582 mono_lock_free_queue_init (&prof->writer_queue);
4583 mono_os_sem_init (&prof->writer_queue_sem, 0);
4585 mono_lock_free_queue_init (&prof->dumper_queue);
4586 mono_os_sem_init (&prof->dumper_queue_sem, 0);
4588 mono_os_mutex_init (&prof->method_table_mutex);
4589 prof->method_table = mono_conc_hashtable_new (NULL, NULL);
4592 coverage_init (prof);
4593 prof->coverage_filters = filters;
4595 prof->startup_time = current_time ();
4600 * declaration to silence the compiler: this is the entry point that
4601 * mono will load from the shared library and call.
4604 mono_profiler_startup (const char *desc);
4607 mono_profiler_startup_log (const char *desc);
4610 * this is the entry point that will be used when the profiler
4611 * is embedded inside the main executable.
4614 mono_profiler_startup_log (const char *desc)
4616 mono_profiler_startup (desc);
4620 mono_profiler_startup (const char *desc)
4622 GPtrArray *filters = NULL;
4625 proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4627 //XXX maybe later cleanup to use config directly
4628 nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4629 no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4630 do_report = config.do_report;
4631 do_debug = config.do_debug;
4632 do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4633 hs_mode_ondemand = config.hs_mode_ondemand;
4634 hs_mode_ms = config.hs_mode_ms;
4635 hs_mode_gc = config.hs_mode_gc;
4636 do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4637 use_zip = config.use_zip;
4638 command_port = config.command_port;
4639 num_frames = config.num_frames;
4640 notraces = config.notraces;
4641 max_allocated_sample_hits = config.max_allocated_sample_hits;
4642 max_call_depth = config.max_call_depth;
4643 do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4644 debug_coverage = config.debug_coverage;
4645 only_coverage = config.only_coverage;
4647 if (config.cov_filter_files) {
4648 filters = g_ptr_array_new ();
4650 for (i = 0; i < config.cov_filter_files->len; ++i) {
4651 const char *name = config.cov_filter_files->pdata [i];
4652 parse_cov_filter_file (filters, name);
4660 prof = create_profiler (desc, config.output_filename, filters);
4666 mono_lls_init (&profiler_thread_list, NULL);
4668 init_thread (prof, TRUE);
4670 //This two events are required for the profiler to work
4671 int events = MONO_PROFILE_THREADS | MONO_PROFILE_GC;
4673 //Required callbacks
4674 mono_profiler_install (prof, log_shutdown);
4675 mono_profiler_install_runtime_initialized (runtime_initialized);
4677 mono_profiler_install_gc (gc_event, gc_resize);
4678 mono_profiler_install_thread (thread_start, thread_end);
4680 //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4681 mono_profiler_install_thread_name (thread_name);
4684 if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4685 events |= MONO_PROFILE_APPDOMAIN_EVENTS;
4686 mono_profiler_install_appdomain (NULL, domain_loaded, domain_unloaded, NULL);
4687 mono_profiler_install_appdomain_name (domain_name);
4690 if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4691 events |= MONO_PROFILE_ASSEMBLY_EVENTS;
4692 mono_profiler_install_assembly (NULL, assembly_loaded, assembly_unloaded, NULL);
4695 if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4696 events |= MONO_PROFILE_MODULE_EVENTS;
4697 mono_profiler_install_module (NULL, image_loaded, image_unloaded, NULL);
4700 if (config.effective_mask & PROFLOG_CLASS_EVENTS) {
4701 events |= MONO_PROFILE_CLASS_EVENTS;
4702 mono_profiler_install_class (NULL, class_loaded, class_unloaded, NULL);
4705 if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4706 events |= MONO_PROFILE_JIT_COMPILATION;
4707 mono_profiler_install_jit_end (method_jitted);
4708 mono_profiler_install_code_buffer_new (code_buffer_new);
4711 if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4712 events |= MONO_PROFILE_EXCEPTIONS;
4713 mono_profiler_install_exception (throw_exc, method_exc_leave, clause_exc);
4716 if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4717 events |= MONO_PROFILE_ALLOCATIONS;
4718 mono_profiler_install_allocation (gc_alloc);
4721 //PROFLOG_GC_EVENTS is mandatory
4722 //PROFLOG_THREAD_EVENTS is mandatory
4724 if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4725 events |= MONO_PROFILE_ENTER_LEAVE;
4726 mono_profiler_install_enter_leave (method_enter, method_leave);
4729 if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS) {
4730 events |= MONO_PROFILE_INS_COVERAGE;
4731 mono_profiler_install_coverage_filter (coverage_filter);
4734 //XXX should we check for PROFLOG_SAMPLING_FEATURE instead??
4735 if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4736 events |= MONO_PROFILE_STATISTICAL;
4737 mono_profiler_set_statistical_mode (config.sampling_mode, config.sample_freq);
4738 mono_profiler_install_statistical (mono_sample_hit);
4741 if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4742 events |= MONO_PROFILE_MONITOR_EVENTS;
4743 mono_profiler_install_monitor (monitor_event);
4746 if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS) {
4747 events |= MONO_PROFILE_GC_MOVES;
4748 mono_profiler_install_gc_moves (gc_moves);
4751 // TODO split those in two profiler events
4752 if (config.effective_mask & (PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_HANDLE_EVENTS)) {
4753 events |= MONO_PROFILE_GC_ROOTS;
4754 mono_profiler_install_gc_roots (
4755 config.effective_mask & (PROFLOG_GC_HANDLE_EVENTS) ? gc_handle : NULL,
4756 (config.effective_mask & PROFLOG_GC_ROOT_EVENTS) ? gc_roots : NULL);
4759 if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4760 events |= MONO_PROFILE_CONTEXT_EVENTS;
4761 mono_profiler_install_context (context_loaded, context_unloaded);
4764 if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4765 events |= MONO_PROFILE_GC_FINALIZATION;
4766 mono_profiler_install_gc_finalize (finalize_begin, finalize_object_begin, finalize_object_end, finalize_end);
4767 } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4768 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4769 events |= MONO_PROFILE_GC_FINALIZATION;
4770 mono_profiler_install_gc_finalize (NULL, NULL, NULL, finalize_end);
4773 //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4774 //PROFLOG_GC_HANDLE_EVENTS is handled together with PROFLOG_GC_ROOT_EVENTS
4776 mono_profiler_set_events ((MonoProfileFlags)events);