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_coverage = 0;
83 static gboolean no_counters = FALSE;
84 static int max_allocated_sample_hits;
86 #define ENABLED(EVT) (config.effective_mask & (EVT))
88 // Statistics for internal profiler data structures.
89 static gint32 sample_allocations_ctr,
90 buffer_allocations_ctr;
92 // Statistics for profiler events.
93 static gint32 sync_points_ctr,
102 gc_handle_creations_ctr,
103 gc_handle_deletions_ctr,
106 finalize_object_begins_ctr,
107 finalize_object_ends_ctr,
111 assembly_unloads_ctr,
116 method_exception_exits_ctr,
119 exception_throws_ctr,
120 exception_clauses_ctr,
133 counter_descriptors_ctr,
135 perfcounter_descriptors_ctr,
136 perfcounter_samples_ctr,
137 coverage_methods_ctr,
138 coverage_statements_ctr,
139 coverage_classes_ctr,
140 coverage_assemblies_ctr;
142 static MonoLinkedListSet profiler_thread_list;
148 * The file is composed by a header followed by 0 or more buffers.
149 * Each buffer contains events that happened on a thread: for a given thread
150 * buffers that appear later in the file are guaranteed to contain events
151 * that happened later in time. Buffers from separate threads could be interleaved,
153 * Buffers are not required to be aligned.
156 * [id: 4 bytes] constant value: LOG_HEADER_ID
157 * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
158 * [format: 1 byte] version of the data format for the rest of the file
159 * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
160 * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
161 * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
162 * [flags: 4 bytes] file format flags, should be 0 for now
163 * [pid: 4 bytes] pid of the profiled process
164 * [port: 2 bytes] tcp port for server if != 0
165 * [args size: 4 bytes] size of args
166 * [args: string] arguments passed to the profiler
167 * [arch size: 4 bytes] size of arch
168 * [arch: string] architecture the profiler is running on
169 * [os size: 4 bytes] size of os
170 * [os: string] operating system the profiler is running on
172 * The multiple byte integers are in little-endian format.
175 * [buffer header] [event]*
176 * Buffers have a fixed-size header followed by 0 or more bytes of event data.
177 * Timing information and other values in the event data are usually stored
178 * as uleb128 or sleb128 integers. To save space, as noted for each item below,
179 * some data is represented as a difference between the actual value and
180 * either the last value of the same type (like for timing information) or
181 * as the difference from a value stored in a buffer header.
183 * For timing information the data is stored as uleb128, since timing
184 * increases in a monotonic way in each thread: the value is the number of
185 * nanoseconds to add to the last seen timing data in a buffer. The first value
186 * in a buffer will be calculated from the time_base field in the buffer head.
188 * Object or heap sizes are stored as uleb128.
189 * Pointer differences are stored as sleb128, instead.
191 * If an unexpected value is found, the rest of the buffer should be ignored,
192 * as generally the later values need the former to be interpreted correctly.
194 * buffer header format:
195 * [bufid: 4 bytes] constant value: BUF_ID
196 * [len: 4 bytes] size of the data following the buffer header
197 * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
198 * [ptr_base: 8 bytes] base value for pointers
199 * [obj_base: 8 bytes] base value for object addresses
200 * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
201 * [method_base: 8 bytes] base value for MonoMethod pointers
204 * [extended info: upper 4 bits] [type: lower 4 bits]
205 * [time diff: uleb128] nanoseconds since last timing
207 * The data that follows depends on type and the extended info.
208 * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
209 * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
210 * The extended info bits are interpreted based on type, see
211 * each individual event description below.
212 * strings are represented as a 0-terminated utf8 sequence.
215 * [num: uleb128] number of frames following
216 * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
217 * pointer or the buffer method_base
221 * exinfo: zero or TYPE_ALLOC_BT
222 * [ptr: sleb128] class as a byte difference from ptr_base
223 * [obj: sleb128] object address as a byte difference from obj_base
224 * [size: uleb128] size of the object in the heap
225 * If exinfo == TYPE_ALLOC_BT, a backtrace follows.
229 * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
230 * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
231 * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
232 * if exinfo == TYPE_GC_RESIZE
233 * [heap_size: uleb128] new heap size
234 * if exinfo == TYPE_GC_EVENT
235 * [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
236 * [generation: byte] GC generation event refers to
237 * if exinfo == TYPE_GC_MOVE
238 * [num_objects: uleb128] number of object moves that follow
239 * [objaddr: sleb128]+ num_objects object pointer differences from obj_base
240 * num is always an even number: the even items are the old
241 * addresses, the odd numbers are the respective new object addresses
242 * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
243 * [handle_type: uleb128] MonoGCHandleType enum value
244 * upper bits reserved as flags
245 * [handle: uleb128] GC handle value
246 * [objaddr: sleb128] object pointer differences from obj_base
247 * If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
248 * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
249 * [handle_type: uleb128] MonoGCHandleType enum value
250 * upper bits reserved as flags
251 * [handle: uleb128] GC handle value
252 * If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
253 * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
254 * [object: sleb128] the object as a difference from obj_base
256 * type metadata format:
257 * type: TYPE_METADATA
258 * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN,
259 * doesn't occur for TYPE_CLASS)
260 * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
261 * TYPE_THREAD, TYPE_CONTEXT
262 * [pointer: sleb128] pointer of the metadata type depending on mtype
263 * if mtype == TYPE_CLASS
264 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
265 * [name: string] full class name
266 * if mtype == TYPE_IMAGE
267 * [name: string] image file name
268 * if mtype == TYPE_ASSEMBLY
269 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
270 * [name: string] assembly name
271 * if mtype == TYPE_DOMAIN && exinfo == 0
272 * [name: string] domain friendly name
273 * if mtype == TYPE_CONTEXT
274 * [domain: sleb128] domain id as pointer
275 * if mtype == TYPE_THREAD && exinfo == 0
276 * [name: string] thread name
278 * type method format:
280 * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
281 * [method: sleb128] MonoMethod* as a pointer difference from the last such
282 * pointer or the buffer method_base
283 * if exinfo == TYPE_JIT
284 * [code address: sleb128] pointer to the native code as a diff from ptr_base
285 * [code size: uleb128] size of the generated code
286 * [name: string] full method name
288 * type exception format:
289 * type: TYPE_EXCEPTION
290 * exinfo: zero, TYPE_CLAUSE, or TYPE_THROW_BT
291 * if exinfo == TYPE_CLAUSE
292 * [clause type: byte] MonoExceptionEnum enum value
293 * [clause index: uleb128] index of the current clause
294 * [method: sleb128] MonoMethod* as a pointer difference from the last such
295 * pointer or the buffer method_base
296 * [object: sleb128] the exception object as a difference from obj_base
298 * [object: sleb128] the exception object as a difference from obj_base
299 * If exinfo == TYPE_THROW_BT, a backtrace follows.
301 * type runtime format:
303 * exinfo: one of: TYPE_JITHELPER
304 * if exinfo == TYPE_JITHELPER
305 * [type: byte] MonoProfilerCodeBufferType enum value
306 * [buffer address: sleb128] pointer to the native code as a diff from ptr_base
307 * [buffer size: uleb128] size of the generated code
308 * if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
309 * [name: string] buffer description name
311 * type monitor format:
313 * exinfo: zero or TYPE_MONITOR_BT
314 * [type: byte] MonoProfilerMonitorEvent enum value
315 * [object: sleb128] the lock object as a difference from obj_base
316 * If exinfo == TYPE_MONITOR_BT, a backtrace follows.
320 * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
321 * if exinfo == TYPE_HEAP_OBJECT
322 * [object: sleb128] the object as a difference from obj_base
323 * [class: sleb128] the object MonoClass* as a difference from ptr_base
324 * [size: uleb128] size of the object on the heap
325 * [num_refs: uleb128] number of object references
326 * each referenced objref is preceded by a uleb128 encoded offset: the
327 * first offset is from the object address and each next offset is relative
328 * to the previous one
329 * [objrefs: sleb128]+ object referenced as a difference from obj_base
330 * The same object can appear multiple times, but only the first time
331 * with size != 0: in the other cases this data will only be used to
332 * provide additional referenced objects.
333 * if exinfo == TYPE_HEAP_ROOT
334 * [num_roots: uleb128] number of root references
335 * [num_gc: uleb128] number of major gcs
336 * [object: sleb128] the object as a difference from obj_base
337 * [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
338 * [extra_info: uleb128] the extra_info value
339 * object, root_type and extra_info are repeated num_roots times
343 * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
344 * if exinfo == TYPE_SAMPLE_HIT
345 * [thread: sleb128] thread id as difference from ptr_base
346 * [count: uleb128] number of following instruction addresses
347 * [ip: sleb128]* instruction pointer as difference from ptr_base
348 * [mbt_count: uleb128] number of managed backtrace frames
349 * [method: sleb128]* MonoMethod* as a pointer difference from the last such
350 * pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
351 * if exinfo == TYPE_SAMPLE_USYM
352 * [address: sleb128] symbol address as a difference from ptr_base
353 * [size: uleb128] symbol size (may be 0 if unknown)
354 * [name: string] symbol name
355 * if exinfo == TYPE_SAMPLE_UBIN
356 * [address: sleb128] address where binary has been loaded as a difference from ptr_base
357 * [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
358 * [size: uleb128] memory size
359 * [name: string] binary name
360 * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
361 * [len: uleb128] number of counters
363 * [section: uleb128] section of counter
364 * if section == MONO_COUNTER_PERFCOUNTERS:
365 * [section_name: string] section name of counter
366 * [name: string] name of counter
367 * [type: byte] type of counter
368 * [unit: byte] unit of counter
369 * [variance: byte] variance of counter
370 * [index: uleb128] unique index of counter
371 * if exinfo == TYPE_SAMPLE_COUNTERS
373 * [index: uleb128] unique index of counter
376 * [type: byte] type of counter value
379 * [0: byte] 0 -> value is null
381 * [1: byte] 1 -> value is not null
382 * [value: string] counter value
384 * [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
386 * type coverage format
387 * type: TYPE_COVERAGE
388 * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
389 * if exinfo == TYPE_COVERAGE_METHOD
390 * [assembly: string] name of assembly
391 * [class: string] name of the class
392 * [name: string] name of the method
393 * [signature: string] the signature of the method
394 * [filename: string] the file path of the file that contains this method
395 * [token: uleb128] the method token
396 * [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
397 * [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
398 * if exinfo == TYPE_COVERAGE_STATEMENTS
399 * [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
400 * [offset: uleb128] the il offset relative to the previous offset
401 * [counter: uleb128] the counter for this instruction
402 * [line: uleb128] the line of filename containing this instruction
403 * [column: uleb128] the column containing this instruction
404 * if exinfo == TYPE_COVERAGE_ASSEMBLY
405 * [name: string] assembly name
406 * [guid: string] assembly GUID
407 * [filename: string] assembly filename
408 * [number_of_methods: uleb128] the number of methods in this assembly
409 * [fully_covered: uleb128] the number of fully covered methods
410 * [partially_covered: uleb128] the number of partially covered methods
411 * currently partially_covered will always be 0, and fully_covered is the
412 * number of methods that are fully and partially covered.
413 * if exinfo == TYPE_COVERAGE_CLASS
414 * [name: string] assembly name
415 * [class: string] class name
416 * [number_of_methods: uleb128] the number of methods in this class
417 * [fully_covered: uleb128] the number of fully covered methods
418 * [partially_covered: uleb128] the number of partially covered methods
419 * currently partially_covered will always be 0, and fully_covered is the
420 * number of methods that are fully and partially covered.
424 * exinfo: one of: TYPE_SYNC_POINT
425 * if exinfo == TYPE_SYNC_POINT
426 * [type: byte] MonoProfilerSyncPointType enum value
429 // Pending data to be written to the log, for a single thread.
430 // Threads periodically flush their own LogBuffers by calling safe_send
431 typedef struct _LogBuffer LogBuffer;
433 // Next (older) LogBuffer in processing queue
439 uintptr_t method_base;
440 uintptr_t last_method;
444 // Bytes allocated for this LogBuffer
447 // Start of currently unused space in buffer
448 unsigned char* cursor;
450 // Pointer to start-of-structure-plus-size (for convenience)
451 unsigned char* buf_end;
453 // Start of data in buffer. Contents follow "buffer format" described above.
454 unsigned char buf [1];
458 MonoLinkedListSetNode node;
460 // Convenience pointer to the profiler structure.
461 MonoProfiler *profiler;
463 // Was this thread added to the LLS?
466 // The current log buffer for this thread.
469 // Methods referenced by events in `buffer`, see `MethodInfo`.
472 // Current call depth for enter/leave events.
475 // Indicates whether this thread is currently writing to its `buffer`.
478 // Has this thread written a thread end event to `buffer`?
481 // Stored in `buffer_lock_state` to take the exclusive lock.
483 } MonoProfilerThread;
485 // Do not use these TLS macros directly unless you know what you're doing.
489 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
490 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
491 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
492 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
494 static DWORD profiler_tls;
498 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
499 #define PROF_TLS_GET() (profiler_tls)
500 #define PROF_TLS_INIT()
501 #define PROF_TLS_FREE()
503 static __thread MonoProfilerThread *profiler_tls;
507 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
508 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
509 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
510 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
512 static pthread_key_t profiler_tls;
519 return (uintptr_t) mono_native_thread_id_get ();
526 return (uintptr_t) GetCurrentProcessId ();
528 return (uintptr_t) getpid ();
533 static mach_timebase_info_data_t timebase_info;
534 #elif defined (HOST_WIN32)
535 static LARGE_INTEGER pcounter_freq;
538 #define TICKS_PER_SEC 1000000000LL
544 uint64_t time = mach_absolute_time ();
546 time *= timebase_info.numer;
547 time /= timebase_info.denom;
550 #elif defined (HOST_WIN32)
553 QueryPerformanceCounter (&value);
555 return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
556 #elif defined (CLOCK_MONOTONIC)
557 struct timespec tspec;
559 clock_gettime (CLOCK_MONOTONIC, &tspec);
561 return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
565 gettimeofday (&tv, NULL);
567 return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
571 static int timer_overhead;
577 mach_timebase_info (&timebase_info);
578 #elif defined (HOST_WIN32)
579 QueryPerformanceFrequency (&pcounter_freq);
582 uint64_t time_start = current_time ();
584 for (int i = 0; i < 256; ++i)
587 uint64_t time_end = current_time ();
589 timer_overhead = (time_end - time_start) / 256;
593 * These macros should be used when writing an event to a log buffer. They
594 * take care of a bunch of stuff that can be repetitive and error-prone, such
595 * as attaching the current thread, acquiring/releasing the buffer lock,
596 * incrementing the event counter, expanding the log buffer, etc. They also
597 * create a scope so that it's harder to leak the LogBuffer pointer, which can
598 * be problematic as the pointer is unstable when the buffer lock isn't
601 * If the calling thread is already attached, these macros will not alter its
602 * attach mode (i.e. whether it's added to the LLS). If the thread is not
603 * attached, init_thread () will be called with add_to_lls = TRUE.
606 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
608 MonoProfilerThread *thread__ = get_thread (); \
609 if (thread__->attached) \
611 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
612 thread__->busy = TRUE; \
613 InterlockedIncrement ((COUNTER)); \
614 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
616 #define EXIT_LOG_EXPLICIT(SEND) \
617 thread__->busy = FALSE; \
619 send_log_unsafe (TRUE); \
620 if (thread__->attached) \
624 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
626 #define NO_SEND FALSE
628 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
630 typedef struct _BinaryObject BinaryObject;
631 struct _BinaryObject {
637 static MonoProfiler *log_profiler;
639 struct _MonoProfiler {
640 MonoProfilerHandle handle;
642 #if defined (HAVE_SYS_ZLIB)
646 uint64_t startup_time;
651 MonoNativeThreadId helper_thread;
652 MonoNativeThreadId writer_thread;
653 MonoNativeThreadId dumper_thread;
654 volatile gint32 run_writer_thread;
655 MonoLockFreeAllocSizeClass writer_entry_size_class;
656 MonoLockFreeAllocator writer_entry_allocator;
657 MonoLockFreeQueue writer_queue;
658 MonoSemType writer_queue_sem;
659 MonoConcurrentHashTable *method_table;
660 mono_mutex_t method_table_mutex;
661 volatile gint32 run_dumper_thread;
662 MonoLockFreeQueue dumper_queue;
663 MonoSemType dumper_queue_sem;
664 MonoLockFreeAllocSizeClass sample_size_class;
665 MonoLockFreeAllocator sample_allocator;
666 MonoLockFreeQueue sample_reuse_queue;
667 BinaryObject *binary_objects;
668 GPtrArray *coverage_filters;
672 MonoLockFreeQueueNode node;
677 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
686 pstrdup (const char *s)
688 int len = strlen (s) + 1;
689 char *p = (char *) g_malloc (len);
695 alloc_buffer (int size)
697 return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
701 free_buffer (void *buf, int size)
703 mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
707 create_buffer (uintptr_t tid, int bytes)
709 LogBuffer* buf = (LogBuffer *) alloc_buffer (MAX (BUFFER_SIZE, bytes));
711 InterlockedIncrement (&buffer_allocations_ctr);
713 buf->size = BUFFER_SIZE;
714 buf->time_base = current_time ();
715 buf->last_time = buf->time_base;
716 buf->buf_end = (unsigned char *) buf + buf->size;
717 buf->cursor = buf->buf;
718 buf->thread_id = tid;
724 * Must be called with the reader lock held if thread is the current thread, or
725 * the exclusive lock if thread is a different thread. However, if thread is
726 * the current thread, and init_thread () was called with add_to_lls = FALSE,
727 * then no locking is necessary.
730 init_buffer_state (MonoProfilerThread *thread)
732 thread->buffer = create_buffer (thread->node.key, 0);
733 thread->methods = NULL;
737 clear_hazard_pointers (MonoThreadHazardPointers *hp)
739 mono_hazard_pointer_clear (hp, 0);
740 mono_hazard_pointer_clear (hp, 1);
741 mono_hazard_pointer_clear (hp, 2);
744 static MonoProfilerThread *
745 init_thread (MonoProfiler *prof, gboolean add_to_lls)
747 MonoProfilerThread *thread = PROF_TLS_GET ();
750 * Sometimes we may try to initialize a thread twice. One example is the
751 * main thread: We initialize it when setting up the profiler, but we will
752 * also get a thread_start () callback for it. Another example is when
753 * attaching new threads to the runtime: We may get a gc_alloc () callback
754 * for that thread's thread object (where we initialize it), soon followed
755 * by a thread_start () callback.
757 * These cases are harmless anyhow. Just return if we've already done the
758 * initialization work.
763 thread = g_malloc (sizeof (MonoProfilerThread));
764 thread->node.key = thread_id ();
765 thread->profiler = prof;
766 thread->attached = add_to_lls;
767 thread->call_depth = 0;
769 thread->ended = FALSE;
771 init_buffer_state (thread);
773 thread->small_id = mono_thread_info_register_small_id ();
776 * Some internal profiler threads don't need to be cleaned up
777 * by the main thread on shutdown.
780 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
781 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
782 clear_hazard_pointers (hp);
785 PROF_TLS_SET (thread);
790 // Only valid if init_thread () was called with add_to_lls = FALSE.
792 deinit_thread (MonoProfilerThread *thread)
794 g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
800 static MonoProfilerThread *
803 return init_thread (log_profiler, TRUE);
806 // Only valid if init_thread () was called with add_to_lls = FALSE.
808 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
810 LogBuffer *old = thread->buffer;
812 if (old->cursor + bytes < old->buf_end)
815 LogBuffer *new_ = create_buffer (thread->node.key, bytes);
817 thread->buffer = new_;
823 * This is a reader/writer spin lock of sorts used to protect log buffers.
824 * When a thread modifies its own log buffer, it increments the reader
825 * count. When a thread wants to access log buffers of other threads, it
826 * takes the exclusive lock.
828 * `buffer_lock_state` holds the reader count in its lower 16 bits, and
829 * the small ID of the thread currently holding the exclusive (writer)
830 * lock in its upper 16 bits. Both can be zero. It's important that the
831 * whole lock state is a single word that can be read/written atomically
832 * to avoid race conditions where there could end up being readers while
833 * the writer lock is held.
835 * The lock is writer-biased. When a thread wants to take the exclusive
836 * lock, it increments `buffer_lock_exclusive_intent` which will make new
837 * readers spin until it's back to zero, then takes the exclusive lock
838 * once the reader count has reached zero. After releasing the exclusive
839 * lock, it decrements `buffer_lock_exclusive_intent`, which, when it
840 * reaches zero again, allows readers to increment the reader count.
842 * The writer bias is necessary because we take the exclusive lock in
843 * `gc_event ()` during STW. If the writer bias was not there, and a
844 * program had a large number of threads, STW-induced pauses could be
845 * significantly longer than they have to be. Also, we emit periodic
846 * sync points from the helper thread, which requires taking the
847 * exclusive lock, and we need those to arrive with a reasonably
848 * consistent frequency so that readers don't have to queue up too many
849 * events between sync points.
851 * The lock does not support recursion.
853 static volatile gint32 buffer_lock_state;
854 static volatile gint32 buffer_lock_exclusive_intent;
860 * If the thread holding the exclusive lock tries to modify the
861 * reader count, just make it a no-op. This way, we also avoid
862 * invoking the GC safe point macros below, which could break if
863 * done from a thread that is currently the initiator of STW.
865 * In other words, we rely on the fact that the GC thread takes
866 * the exclusive lock in the gc_event () callback when the world
869 if (InterlockedRead (&buffer_lock_state) != get_thread ()->small_id << 16) {
876 // Hold off if a thread wants to take the exclusive lock.
877 while (InterlockedRead (&buffer_lock_exclusive_intent))
878 mono_thread_info_yield ();
880 old = InterlockedRead (&buffer_lock_state);
882 // Is a thread holding the exclusive lock?
884 mono_thread_info_yield ();
889 } while (InterlockedCompareExchange (&buffer_lock_state, new_, old) != old);
894 mono_memory_barrier ();
900 mono_memory_barrier ();
902 gint32 state = InterlockedRead (&buffer_lock_state);
904 // See the comment in buffer_lock ().
905 if (state == PROF_TLS_GET ()->small_id << 16)
908 g_assert (state && "Why are we decrementing a zero reader count?");
909 g_assert (!(state >> 16) && "Why is the exclusive lock held?");
911 InterlockedDecrement (&buffer_lock_state);
915 buffer_lock_excl (void)
917 gint32 new_ = get_thread ()->small_id << 16;
919 g_assert (InterlockedRead (&buffer_lock_state) != new_ && "Why are we taking the exclusive lock twice?");
921 InterlockedIncrement (&buffer_lock_exclusive_intent);
925 while (InterlockedCompareExchange (&buffer_lock_state, new_, 0))
926 mono_thread_info_yield ();
930 mono_memory_barrier ();
934 buffer_unlock_excl (void)
936 mono_memory_barrier ();
938 gint32 state = InterlockedRead (&buffer_lock_state);
939 gint32 excl = state >> 16;
941 g_assert (excl && "Why is the exclusive lock not held?");
942 g_assert (excl == PROF_TLS_GET ()->small_id && "Why does another thread hold the exclusive lock?");
943 g_assert (!(state & 0xFFFF) && "Why are there readers when the exclusive lock is held?");
945 InterlockedWrite (&buffer_lock_state, 0);
946 InterlockedDecrement (&buffer_lock_exclusive_intent);
950 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
955 uint8_t b = value & 0x7f;
958 if (value != 0) /* more bytes to come */
968 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
971 int negative = (value < 0);
972 unsigned int size = sizeof (intptr_t) * 8;
980 /* the following is unnecessary if the
981 * implementation of >>= uses an arithmetic rather
982 * than logical shift for a signed left operand
986 value |= - ((intptr_t) 1 <<(size - 7));
988 /* sign bit of byte is second high order bit (0x40) */
989 if ((value == 0 && !(byte & 0x40)) ||
990 (value == -1 && (byte & 0x40)))
1002 emit_byte (LogBuffer *logbuffer, int value)
1004 logbuffer->cursor [0] = value;
1005 logbuffer->cursor++;
1007 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1011 emit_value (LogBuffer *logbuffer, int value)
1013 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1015 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1019 emit_time (LogBuffer *logbuffer, uint64_t value)
1021 uint64_t tdiff = value - logbuffer->last_time;
1022 encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
1023 logbuffer->last_time = value;
1025 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1029 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
1031 emit_byte (logbuffer, event);
1032 emit_time (logbuffer, time);
1036 emit_event (LogBuffer *logbuffer, int event)
1038 emit_event_time (logbuffer, event, current_time ());
1042 emit_svalue (LogBuffer *logbuffer, int64_t value)
1044 encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1046 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1050 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
1052 encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1054 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1058 emit_ptr (LogBuffer *logbuffer, const void *ptr)
1060 if (!logbuffer->ptr_base)
1061 logbuffer->ptr_base = (uintptr_t) ptr;
1063 emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
1065 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1069 emit_method_inner (LogBuffer *logbuffer, void *method)
1071 if (!logbuffer->method_base) {
1072 logbuffer->method_base = (intptr_t) method;
1073 logbuffer->last_method = (intptr_t) method;
1076 encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1077 logbuffer->last_method = (intptr_t) method;
1079 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1082 // The reader lock must be held.
1084 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1086 MonoProfilerThread *thread = get_thread ();
1088 if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1089 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1091 info->method = method;
1093 info->time = current_time ();
1095 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1096 g_ptr_array_add (arr, info);
1101 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1103 register_method_local (method, NULL);
1104 emit_method_inner (logbuffer, method);
1108 emit_obj (LogBuffer *logbuffer, void *ptr)
1110 if (!logbuffer->obj_base)
1111 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1113 emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1115 g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1119 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1123 for (; i < size; i++) {
1126 emit_byte (logbuffer, str [i]);
1129 emit_byte (logbuffer, '\0');
1133 emit_double (LogBuffer *logbuffer, double value)
1136 unsigned char buffer[8];
1137 memcpy (buffer, &value, 8);
1138 #if G_BYTE_ORDER == G_BIG_ENDIAN
1139 for (i = 7; i >= 0; i--)
1141 for (i = 0; i < 8; i++)
1143 emit_byte (logbuffer, buffer[i]);
1147 write_int16 (char *buf, int32_t value)
1150 for (i = 0; i < 2; ++i) {
1158 write_int32 (char *buf, int32_t value)
1161 for (i = 0; i < 4; ++i) {
1169 write_int64 (char *buf, int64_t value)
1172 for (i = 0; i < 8; ++i) {
1180 write_header_string (char *p, const char *str)
1182 size_t len = strlen (str) + 1;
1184 p = write_int32 (p, len);
1191 dump_header (MonoProfiler *profiler)
1193 const char *args = profiler->args;
1194 const char *arch = mono_config_get_cpu ();
1195 const char *os = mono_config_get_os ();
1197 char *hbuf = g_malloc (
1198 sizeof (gint32) /* header id */ +
1199 sizeof (gint8) /* major version */ +
1200 sizeof (gint8) /* minor version */ +
1201 sizeof (gint8) /* data version */ +
1202 sizeof (gint8) /* word size */ +
1203 sizeof (gint64) /* startup time */ +
1204 sizeof (gint32) /* timer overhead */ +
1205 sizeof (gint32) /* flags */ +
1206 sizeof (gint32) /* process id */ +
1207 sizeof (gint16) /* command port */ +
1208 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1209 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1210 sizeof (gint32) + strlen (os) + 1 /* operating system */
1214 p = write_int32 (p, LOG_HEADER_ID);
1215 *p++ = LOG_VERSION_MAJOR;
1216 *p++ = LOG_VERSION_MINOR;
1217 *p++ = LOG_DATA_VERSION;
1218 *p++ = sizeof (void *);
1219 p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1220 p = write_int32 (p, timer_overhead);
1221 p = write_int32 (p, 0); /* flags */
1222 p = write_int32 (p, process_id ());
1223 p = write_int16 (p, profiler->command_port);
1224 p = write_header_string (p, args);
1225 p = write_header_string (p, arch);
1226 p = write_header_string (p, os);
1228 #if defined (HAVE_SYS_ZLIB)
1229 if (profiler->gzfile) {
1230 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1234 fwrite (hbuf, p - hbuf, 1, profiler->file);
1235 fflush (profiler->file);
1242 * Must be called with the reader lock held if thread is the current thread, or
1243 * the exclusive lock if thread is a different thread. However, if thread is
1244 * the current thread, and init_thread () was called with add_to_lls = FALSE,
1245 * then no locking is necessary.
1248 send_buffer (MonoProfilerThread *thread)
1250 WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1251 entry->methods = thread->methods;
1252 entry->buffer = thread->buffer;
1254 mono_lock_free_queue_node_init (&entry->node, FALSE);
1256 mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1257 mono_os_sem_post (&thread->profiler->writer_queue_sem);
1261 free_thread (gpointer p)
1263 MonoProfilerThread *thread = p;
1265 if (!thread->ended) {
1267 * The thread is being cleaned up by the main thread during
1268 * shutdown. This typically happens for internal runtime
1269 * threads. We need to synthesize a thread end event.
1272 InterlockedIncrement (&thread_ends_ctr);
1274 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1275 LogBuffer *buf = ensure_logbuf_unsafe (thread,
1276 EVENT_SIZE /* event */ +
1277 BYTE_SIZE /* type */ +
1278 LEB128_SIZE /* tid */
1281 emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1282 emit_byte (buf, TYPE_THREAD);
1283 emit_ptr (buf, (void *) thread->node.key);
1287 send_buffer (thread);
1293 remove_thread (MonoProfilerThread *thread)
1295 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1297 if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1298 mono_thread_hazardous_try_free (thread, free_thread);
1300 clear_hazard_pointers (hp);
1304 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1310 dump_buffer (profiler, buf->next);
1312 if (buf->cursor - buf->buf) {
1313 p = write_int32 (p, BUF_ID);
1314 p = write_int32 (p, buf->cursor - buf->buf);
1315 p = write_int64 (p, buf->time_base);
1316 p = write_int64 (p, buf->ptr_base);
1317 p = write_int64 (p, buf->obj_base);
1318 p = write_int64 (p, buf->thread_id);
1319 p = write_int64 (p, buf->method_base);
1321 #if defined (HAVE_SYS_ZLIB)
1322 if (profiler->gzfile) {
1323 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1324 gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1328 fwrite (hbuf, p - hbuf, 1, profiler->file);
1329 fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1330 fflush (profiler->file);
1334 free_buffer (buf, buf->size);
1338 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1340 for (LogBuffer *iter = buf; iter; iter = iter->next)
1341 iter->thread_id = 0;
1343 dump_buffer (profiler, buf);
1346 // Only valid if init_thread () was called with add_to_lls = FALSE.
1348 send_log_unsafe (gboolean if_needed)
1350 MonoProfilerThread *thread = PROF_TLS_GET ();
1352 if (!if_needed || (if_needed && thread->buffer->next)) {
1353 if (!thread->attached)
1354 for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1355 iter->thread_id = 0;
1357 send_buffer (thread);
1358 init_buffer_state (thread);
1362 // Assumes that the exclusive lock is held.
1364 sync_point_flush (void)
1366 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1368 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1369 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1371 send_buffer (thread);
1372 init_buffer_state (thread);
1373 } MONO_LLS_FOREACH_SAFE_END
1376 // Assumes that the exclusive lock is held.
1378 sync_point_mark (MonoProfilerSyncPointType type)
1380 g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1382 ENTER_LOG (&sync_points_ctr, logbuffer,
1383 EVENT_SIZE /* event */ +
1384 LEB128_SIZE /* type */
1387 emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1388 emit_byte (logbuffer, type);
1390 EXIT_LOG_EXPLICIT (NO_SEND);
1392 send_log_unsafe (FALSE);
1395 // Assumes that the exclusive lock is held.
1397 sync_point (MonoProfilerSyncPointType type)
1399 sync_point_flush ();
1400 sync_point_mark (type);
1404 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1406 /* account for object alignment in the heap */
1410 ENTER_LOG (&heap_objects_ctr, logbuffer,
1411 EVENT_SIZE /* event */ +
1412 LEB128_SIZE /* obj */ +
1413 LEB128_SIZE /* klass */ +
1414 LEB128_SIZE /* size */ +
1415 LEB128_SIZE /* num */ +
1417 LEB128_SIZE /* offset */ +
1418 LEB128_SIZE /* ref */
1422 emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1423 emit_obj (logbuffer, obj);
1424 emit_ptr (logbuffer, klass);
1425 emit_value (logbuffer, size);
1426 emit_value (logbuffer, num);
1428 uintptr_t last_offset = 0;
1430 for (int i = 0; i < num; ++i) {
1431 emit_value (logbuffer, offsets [i] - last_offset);
1432 last_offset = offsets [i];
1433 emit_obj (logbuffer, refs [i]);
1436 EXIT_LOG_EXPLICIT (DO_SEND);
1441 static unsigned int hs_mode_ms = 0;
1442 static unsigned int hs_mode_gc = 0;
1443 static unsigned int hs_mode_ondemand = 0;
1444 static unsigned int gc_count = 0;
1445 static uint64_t last_hs_time = 0;
1446 static gboolean do_heap_walk = FALSE;
1447 static gboolean ignore_heap_events;
1450 gc_roots (MonoProfiler *prof, MonoObject *const *objects, const MonoProfilerGCRootType *root_types, const uintptr_t *extra_info, uint64_t num)
1452 if (ignore_heap_events)
1455 ENTER_LOG (&heap_roots_ctr, logbuffer,
1456 EVENT_SIZE /* event */ +
1457 LEB128_SIZE /* num */ +
1458 LEB128_SIZE /* collections */ +
1460 LEB128_SIZE /* object */ +
1461 LEB128_SIZE /* root type */ +
1462 LEB128_SIZE /* extra info */
1466 emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1467 emit_value (logbuffer, num);
1468 emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1470 for (int i = 0; i < num; ++i) {
1471 emit_obj (logbuffer, objects [i]);
1472 emit_byte (logbuffer, root_types [i]);
1473 emit_value (logbuffer, extra_info [i]);
1476 EXIT_LOG_EXPLICIT (DO_SEND);
1481 trigger_on_demand_heapshot (void)
1483 if (heapshot_requested)
1484 mono_gc_collect (mono_gc_max_generation ());
1487 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1490 gc_event (MonoProfiler *profiler, MonoProfilerGCEvent ev, uint32_t generation)
1492 if (ev == MONO_GC_EVENT_START) {
1493 uint64_t now = current_time ();
1495 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1496 do_heap_walk = TRUE;
1497 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1498 do_heap_walk = TRUE;
1499 else if (hs_mode_ondemand)
1500 do_heap_walk = heapshot_requested;
1501 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1502 do_heap_walk = TRUE;
1504 //If using heapshot, ignore events for collections we don't care
1505 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1506 // Ignore events generated during the collection itself (IE GC ROOTS)
1507 ignore_heap_events = !do_heap_walk;
1512 if (ENABLED (PROFLOG_GC_EVENTS)) {
1513 ENTER_LOG (&gc_events_ctr, logbuffer,
1514 EVENT_SIZE /* event */ +
1515 BYTE_SIZE /* gc event */ +
1516 BYTE_SIZE /* generation */
1519 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1520 emit_byte (logbuffer, ev);
1521 emit_byte (logbuffer, generation);
1523 EXIT_LOG_EXPLICIT (NO_SEND);
1527 case MONO_GC_EVENT_START:
1528 if (generation == mono_gc_max_generation ())
1532 case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1534 * Ensure that no thread can be in the middle of writing to
1535 * a buffer when the world stops...
1537 buffer_lock_excl ();
1539 case MONO_GC_EVENT_POST_STOP_WORLD:
1541 * ... So that we now have a consistent view of all buffers.
1542 * This allows us to flush them. We need to do this because
1543 * they may contain object allocation events that need to be
1544 * committed to the log file before any object move events
1545 * that will be produced during this GC.
1547 if (ENABLED (ALL_GC_EVENTS_MASK))
1548 sync_point (SYNC_POINT_WORLD_STOP);
1551 * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1552 * Right now, that's the case for GC Moves, GC Roots or heapshots.
1554 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1555 ENTER_LOG (&heap_starts_ctr, logbuffer,
1556 EVENT_SIZE /* event */
1559 emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1561 EXIT_LOG_EXPLICIT (DO_SEND);
1565 case MONO_GC_EVENT_PRE_START_WORLD:
1566 if (do_heap_shot && do_heap_walk)
1567 mono_gc_walk_heap (0, gc_reference, NULL);
1569 /* Matching HEAP_END to the HEAP_START from above */
1570 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1571 ENTER_LOG (&heap_ends_ctr, logbuffer,
1572 EVENT_SIZE /* event */
1575 emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1577 EXIT_LOG_EXPLICIT (DO_SEND);
1580 if (do_heap_shot && do_heap_walk) {
1581 do_heap_walk = FALSE;
1582 heapshot_requested = 0;
1583 last_hs_time = current_time ();
1587 * Similarly, we must now make sure that any object moves
1588 * written to the GC thread's buffer are flushed. Otherwise,
1589 * object allocation events for certain addresses could come
1590 * after the move events that made those addresses available.
1592 if (ENABLED (ALL_GC_EVENTS_MASK))
1593 sync_point_mark (SYNC_POINT_WORLD_START);
1595 case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1597 * Finally, it is safe to allow other threads to write to
1598 * their buffers again.
1600 buffer_unlock_excl ();
1608 gc_resize (MonoProfiler *profiler, uintptr_t new_size)
1610 ENTER_LOG (&gc_resizes_ctr, logbuffer,
1611 EVENT_SIZE /* event */ +
1612 LEB128_SIZE /* new size */
1615 emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1616 emit_value (logbuffer, new_size);
1618 EXIT_LOG_EXPLICIT (DO_SEND);
1623 MonoMethod* methods [MAX_FRAMES];
1624 int32_t il_offsets [MAX_FRAMES];
1625 int32_t native_offsets [MAX_FRAMES];
1628 static int num_frames = MAX_FRAMES;
1631 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1633 FrameData *frame = (FrameData *)data;
1634 if (method && frame->count < num_frames) {
1635 frame->il_offsets [frame->count] = il_offset;
1636 frame->native_offsets [frame->count] = native_offset;
1637 frame->methods [frame->count++] = method;
1638 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1640 return frame->count == num_frames;
1644 * a note about stack walks: they can cause more profiler events to fire,
1645 * so we need to make sure they don't happen after we started emitting an
1646 * event, hence the collect_bt/emit_bt split.
1649 collect_bt (FrameData *data)
1652 mono_stack_walk_no_il (walk_stack, data);
1656 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1658 if (data->count > num_frames)
1659 printf ("bad num frames: %d\n", data->count);
1661 emit_value (logbuffer, data->count);
1664 emit_method (logbuffer, data->methods [--data->count]);
1668 gc_alloc (MonoProfiler *prof, MonoObject *obj)
1670 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1672 uintptr_t len = mono_object_get_size (obj);
1673 /* account for object alignment in the heap */
1680 ENTER_LOG (&gc_allocs_ctr, logbuffer,
1681 EVENT_SIZE /* event */ +
1682 LEB128_SIZE /* klass */ +
1683 LEB128_SIZE /* obj */ +
1684 LEB128_SIZE /* size */ +
1686 LEB128_SIZE /* count */ +
1688 LEB128_SIZE /* method */
1693 emit_event (logbuffer, do_bt | TYPE_ALLOC);
1694 emit_ptr (logbuffer, mono_object_get_class (obj));
1695 emit_obj (logbuffer, obj);
1696 emit_value (logbuffer, len);
1699 emit_bt (prof, logbuffer, &data);
1705 gc_moves (MonoProfiler *prof, MonoObject *const *objects, uint64_t num)
1707 ENTER_LOG (&gc_moves_ctr, logbuffer,
1708 EVENT_SIZE /* event */ +
1709 LEB128_SIZE /* num */ +
1711 LEB128_SIZE /* object */
1715 emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1716 emit_value (logbuffer, num);
1718 for (int i = 0; i < num; ++i)
1719 emit_obj (logbuffer, objects [i]);
1721 EXIT_LOG_EXPLICIT (DO_SEND);
1725 gc_handle (MonoProfiler *prof, int op, MonoGCHandleType type, uint32_t handle, MonoObject *obj)
1727 int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1733 gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1735 ENTER_LOG (ctr, logbuffer,
1736 EVENT_SIZE /* event */ +
1737 LEB128_SIZE /* type */ +
1738 LEB128_SIZE /* handle */ +
1739 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1740 LEB128_SIZE /* obj */
1743 LEB128_SIZE /* count */ +
1745 LEB128_SIZE /* method */
1750 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1751 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1752 else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1753 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1755 g_assert_not_reached ();
1757 emit_value (logbuffer, type);
1758 emit_value (logbuffer, handle);
1760 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1761 emit_obj (logbuffer, obj);
1764 emit_bt (prof, logbuffer, &data);
1770 gc_handle_created (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type, MonoObject *obj)
1772 gc_handle (prof, MONO_PROFILER_GC_HANDLE_CREATED, type, handle, obj);
1776 gc_handle_deleted (MonoProfiler *prof, uint32_t handle, MonoGCHandleType type)
1778 gc_handle (prof, MONO_PROFILER_GC_HANDLE_DESTROYED, type, handle, NULL);
1782 finalize_begin (MonoProfiler *prof)
1784 ENTER_LOG (&finalize_begins_ctr, buf,
1785 EVENT_SIZE /* event */
1788 emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1794 finalize_end (MonoProfiler *prof)
1796 trigger_on_demand_heapshot ();
1797 if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1798 ENTER_LOG (&finalize_ends_ctr, buf,
1799 EVENT_SIZE /* event */
1802 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1809 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1811 ENTER_LOG (&finalize_object_begins_ctr, buf,
1812 EVENT_SIZE /* event */ +
1813 LEB128_SIZE /* obj */
1816 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1817 emit_obj (buf, obj);
1823 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1825 ENTER_LOG (&finalize_object_ends_ctr, buf,
1826 EVENT_SIZE /* event */ +
1827 LEB128_SIZE /* obj */
1830 emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1831 emit_obj (buf, obj);
1837 push_nesting (char *p, MonoClass *klass)
1842 nesting = mono_class_get_nesting_type (klass);
1844 p = push_nesting (p, nesting);
1848 name = mono_class_get_name (klass);
1849 nspace = mono_class_get_namespace (klass);
1852 p += strlen (nspace);
1862 type_name (MonoClass *klass)
1866 push_nesting (buf, klass);
1867 p = (char *) g_malloc (strlen (buf) + 1);
1873 image_loaded (MonoProfiler *prof, MonoImage *image)
1875 const char *name = mono_image_get_filename (image);
1876 int nlen = strlen (name) + 1;
1878 ENTER_LOG (&image_loads_ctr, logbuffer,
1879 EVENT_SIZE /* event */ +
1880 BYTE_SIZE /* type */ +
1881 LEB128_SIZE /* image */ +
1885 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1886 emit_byte (logbuffer, TYPE_IMAGE);
1887 emit_ptr (logbuffer, image);
1888 memcpy (logbuffer->cursor, name, nlen);
1889 logbuffer->cursor += nlen;
1895 image_unloaded (MonoProfiler *prof, MonoImage *image)
1897 const char *name = mono_image_get_filename (image);
1898 int nlen = strlen (name) + 1;
1900 ENTER_LOG (&image_unloads_ctr, logbuffer,
1901 EVENT_SIZE /* event */ +
1902 BYTE_SIZE /* type */ +
1903 LEB128_SIZE /* image */ +
1907 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1908 emit_byte (logbuffer, TYPE_IMAGE);
1909 emit_ptr (logbuffer, image);
1910 memcpy (logbuffer->cursor, name, nlen);
1911 logbuffer->cursor += nlen;
1917 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly)
1919 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1920 int nlen = strlen (name) + 1;
1921 MonoImage *image = mono_assembly_get_image (assembly);
1923 ENTER_LOG (&assembly_loads_ctr, logbuffer,
1924 EVENT_SIZE /* event */ +
1925 BYTE_SIZE /* type */ +
1926 LEB128_SIZE /* assembly */ +
1927 LEB128_SIZE /* image */ +
1931 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1932 emit_byte (logbuffer, TYPE_ASSEMBLY);
1933 emit_ptr (logbuffer, assembly);
1934 emit_ptr (logbuffer, image);
1935 memcpy (logbuffer->cursor, name, nlen);
1936 logbuffer->cursor += nlen;
1944 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1946 char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1947 int nlen = strlen (name) + 1;
1948 MonoImage *image = mono_assembly_get_image (assembly);
1950 ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1951 EVENT_SIZE /* event */ +
1952 BYTE_SIZE /* type */ +
1953 LEB128_SIZE /* assembly */ +
1954 LEB128_SIZE /* image */ +
1958 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1959 emit_byte (logbuffer, TYPE_ASSEMBLY);
1960 emit_ptr (logbuffer, assembly);
1961 emit_ptr (logbuffer, image);
1962 memcpy (logbuffer->cursor, name, nlen);
1963 logbuffer->cursor += nlen;
1971 class_loaded (MonoProfiler *prof, MonoClass *klass)
1975 if (InterlockedRead (&runtime_inited))
1976 name = mono_type_get_name (mono_class_get_type (klass));
1978 name = type_name (klass);
1980 int nlen = strlen (name) + 1;
1981 MonoImage *image = mono_class_get_image (klass);
1983 ENTER_LOG (&class_loads_ctr, logbuffer,
1984 EVENT_SIZE /* event */ +
1985 BYTE_SIZE /* type */ +
1986 LEB128_SIZE /* klass */ +
1987 LEB128_SIZE /* image */ +
1991 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1992 emit_byte (logbuffer, TYPE_CLASS);
1993 emit_ptr (logbuffer, klass);
1994 emit_ptr (logbuffer, image);
1995 memcpy (logbuffer->cursor, name, nlen);
1996 logbuffer->cursor += nlen;
2007 method_enter (MonoProfiler *prof, MonoMethod *method)
2009 if (get_thread ()->call_depth++ <= max_call_depth) {
2010 ENTER_LOG (&method_entries_ctr, logbuffer,
2011 EVENT_SIZE /* event */ +
2012 LEB128_SIZE /* method */
2015 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
2016 emit_method (logbuffer, method);
2023 method_leave (MonoProfiler *prof, MonoMethod *method)
2025 if (--get_thread ()->call_depth <= max_call_depth) {
2026 ENTER_LOG (&method_exits_ctr, logbuffer,
2027 EVENT_SIZE /* event */ +
2028 LEB128_SIZE /* method */
2031 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2032 emit_method (logbuffer, method);
2039 method_exc_leave (MonoProfiler *prof, MonoMethod *method, MonoObject *exc)
2041 if (!nocalls && --get_thread ()->call_depth <= max_call_depth) {
2042 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2043 EVENT_SIZE /* event */ +
2044 LEB128_SIZE /* method */
2047 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2048 emit_method (logbuffer, method);
2054 static MonoProfilerCallInstrumentationFlags
2055 method_filter (MonoProfiler *prof, MonoMethod *method)
2057 return MONO_PROFILER_CALL_INSTRUMENTATION_PROLOGUE | MONO_PROFILER_CALL_INSTRUMENTATION_EPILOGUE;
2061 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji)
2065 register_method_local (method, ji);
2071 code_buffer_new (MonoProfiler *prof, const mono_byte *buffer, uint64_t size, MonoProfilerCodeBufferType type, const void *data)
2076 if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2077 name = (const char *) data;
2078 nlen = strlen (name) + 1;
2084 ENTER_LOG (&code_buffers_ctr, logbuffer,
2085 EVENT_SIZE /* event */ +
2086 BYTE_SIZE /* type */ +
2087 LEB128_SIZE /* buffer */ +
2088 LEB128_SIZE /* size */ +
2094 emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2095 emit_byte (logbuffer, type);
2096 emit_ptr (logbuffer, buffer);
2097 emit_value (logbuffer, size);
2100 memcpy (logbuffer->cursor, name, nlen);
2101 logbuffer->cursor += nlen;
2108 throw_exc (MonoProfiler *prof, MonoObject *object)
2110 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2116 ENTER_LOG (&exception_throws_ctr, logbuffer,
2117 EVENT_SIZE /* event */ +
2118 LEB128_SIZE /* object */ +
2120 LEB128_SIZE /* count */ +
2122 LEB128_SIZE /* method */
2127 emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2128 emit_obj (logbuffer, object);
2131 emit_bt (prof, logbuffer, &data);
2137 clause_exc (MonoProfiler *prof, MonoMethod *method, uint32_t clause_num, MonoExceptionEnum clause_type, MonoObject *exc)
2139 ENTER_LOG (&exception_clauses_ctr, logbuffer,
2140 EVENT_SIZE /* event */ +
2141 BYTE_SIZE /* clause type */ +
2142 LEB128_SIZE /* clause num */ +
2143 LEB128_SIZE /* method */
2146 emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2147 emit_byte (logbuffer, clause_type);
2148 emit_value (logbuffer, clause_num);
2149 emit_method (logbuffer, method);
2150 emit_obj (logbuffer, exc);
2156 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2158 int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2164 ENTER_LOG (&monitor_events_ctr, logbuffer,
2165 EVENT_SIZE /* event */ +
2166 BYTE_SIZE /* ev */ +
2167 LEB128_SIZE /* object */ +
2169 LEB128_SIZE /* count */ +
2171 LEB128_SIZE /* method */
2176 emit_event (logbuffer, do_bt | TYPE_MONITOR);
2177 emit_byte (logbuffer, ev);
2178 emit_obj (logbuffer, object);
2181 emit_bt (profiler, logbuffer, &data);
2187 monitor_contention (MonoProfiler *prof, MonoObject *object)
2189 monitor_event (prof, object, MONO_PROFILER_MONITOR_CONTENTION);
2193 monitor_acquired (MonoProfiler *prof, MonoObject *object)
2195 monitor_event (prof, object, MONO_PROFILER_MONITOR_DONE);
2199 monitor_failed (MonoProfiler *prof, MonoObject *object)
2201 monitor_event (prof, object, MONO_PROFILER_MONITOR_FAIL);
2205 thread_start (MonoProfiler *prof, uintptr_t tid)
2207 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2208 ENTER_LOG (&thread_starts_ctr, logbuffer,
2209 EVENT_SIZE /* event */ +
2210 BYTE_SIZE /* type */ +
2211 LEB128_SIZE /* tid */
2214 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2215 emit_byte (logbuffer, TYPE_THREAD);
2216 emit_ptr (logbuffer, (void*) tid);
2223 thread_end (MonoProfiler *prof, uintptr_t tid)
2225 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2226 ENTER_LOG (&thread_ends_ctr, logbuffer,
2227 EVENT_SIZE /* event */ +
2228 BYTE_SIZE /* type */ +
2229 LEB128_SIZE /* tid */
2232 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2233 emit_byte (logbuffer, TYPE_THREAD);
2234 emit_ptr (logbuffer, (void*) tid);
2236 EXIT_LOG_EXPLICIT (NO_SEND);
2239 MonoProfilerThread *thread = get_thread ();
2241 thread->ended = TRUE;
2242 remove_thread (thread);
2244 PROF_TLS_SET (NULL);
2248 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2250 int len = strlen (name) + 1;
2252 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2253 ENTER_LOG (&thread_names_ctr, logbuffer,
2254 EVENT_SIZE /* event */ +
2255 BYTE_SIZE /* type */ +
2256 LEB128_SIZE /* tid */ +
2260 emit_event (logbuffer, TYPE_METADATA);
2261 emit_byte (logbuffer, TYPE_THREAD);
2262 emit_ptr (logbuffer, (void*)tid);
2263 memcpy (logbuffer->cursor, name, len);
2264 logbuffer->cursor += len;
2271 domain_loaded (MonoProfiler *prof, MonoDomain *domain)
2273 ENTER_LOG (&domain_loads_ctr, logbuffer,
2274 EVENT_SIZE /* event */ +
2275 BYTE_SIZE /* type */ +
2276 LEB128_SIZE /* domain id */
2279 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2280 emit_byte (logbuffer, TYPE_DOMAIN);
2281 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2287 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2289 ENTER_LOG (&domain_unloads_ctr, logbuffer,
2290 EVENT_SIZE /* event */ +
2291 BYTE_SIZE /* type */ +
2292 LEB128_SIZE /* domain id */
2295 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2296 emit_byte (logbuffer, TYPE_DOMAIN);
2297 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2303 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2305 int nlen = strlen (name) + 1;
2307 ENTER_LOG (&domain_names_ctr, logbuffer,
2308 EVENT_SIZE /* event */ +
2309 BYTE_SIZE /* type */ +
2310 LEB128_SIZE /* domain id */ +
2314 emit_event (logbuffer, TYPE_METADATA);
2315 emit_byte (logbuffer, TYPE_DOMAIN);
2316 emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2317 memcpy (logbuffer->cursor, name, nlen);
2318 logbuffer->cursor += nlen;
2324 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2326 ENTER_LOG (&context_loads_ctr, logbuffer,
2327 EVENT_SIZE /* event */ +
2328 BYTE_SIZE /* type */ +
2329 LEB128_SIZE /* context id */ +
2330 LEB128_SIZE /* domain id */
2333 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2334 emit_byte (logbuffer, TYPE_CONTEXT);
2335 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2336 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2342 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2344 ENTER_LOG (&context_unloads_ctr, logbuffer,
2345 EVENT_SIZE /* event */ +
2346 BYTE_SIZE /* type */ +
2347 LEB128_SIZE /* context id */ +
2348 LEB128_SIZE /* domain id */
2351 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2352 emit_byte (logbuffer, TYPE_CONTEXT);
2353 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2354 emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2367 MonoLockFreeQueueNode node;
2373 AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2377 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2379 SampleHit *sample = (SampleHit *) data;
2381 if (sample->count < num_frames) {
2382 int i = sample->count;
2384 sample->frames [i].method = method;
2385 sample->frames [i].domain = domain;
2386 sample->frames [i].base_address = base_address;
2387 sample->frames [i].offset = offset;
2392 return sample->count == num_frames;
2395 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2396 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2399 enqueue_sample_hit (gpointer p)
2401 SampleHit *sample = p;
2403 mono_lock_free_queue_node_unpoison (&sample->node);
2404 mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2405 mono_os_sem_post (&sample->prof->dumper_queue_sem);
2409 mono_sample_hit (MonoProfiler *profiler, const mono_byte *ip, const void *context)
2412 * Please note: We rely on the runtime loading the profiler with
2413 * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2414 * this function (and its siblings) are resolved when the profiler is
2415 * loaded. Otherwise, we would potentially invoke the dynamic linker when
2416 * invoking runtime functions, which is not async-signal-safe.
2419 if (InterlockedRead (&in_shutdown))
2422 SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2426 * If we're out of reusable sample events and we're not allowed to
2427 * allocate more, we have no choice but to drop the event.
2429 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2432 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2433 sample->prof = profiler;
2434 mono_lock_free_queue_node_init (&sample->node, TRUE);
2436 InterlockedIncrement (&sample_allocations_ctr);
2440 mono_stack_walk_async_safe (&async_walk_stack, (void *) context, sample);
2442 sample->time = current_time ();
2443 sample->tid = thread_id ();
2446 mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2449 static uintptr_t *code_pages = 0;
2450 static int num_code_pages = 0;
2451 static int size_code_pages = 0;
2452 #define CPAGE_SHIFT (9)
2453 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2454 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2455 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2458 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2461 uintptr_t start_pos;
2462 start_pos = (page >> CPAGE_SHIFT) % hsize;
2465 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2467 } else if (!hash [i]) {
2474 } while (i != start_pos);
2475 /* should not happen */
2476 printf ("failed code page store\n");
2481 add_code_pointer (uintptr_t ip)
2484 if (num_code_pages * 2 >= size_code_pages) {
2486 uintptr_t old_size = size_code_pages;
2487 size_code_pages *= 2;
2488 if (size_code_pages == 0)
2489 size_code_pages = 16;
2490 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2491 for (i = 0; i < old_size; ++i) {
2493 add_code_page (n, size_code_pages, code_pages [i]);
2496 g_free (code_pages);
2499 num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2502 /* ELF code crashes on some systems. */
2503 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2506 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2508 int len = strlen (filename) + 1;
2510 ENTER_LOG (&sample_ubins_ctr, logbuffer,
2511 EVENT_SIZE /* event */ +
2512 LEB128_SIZE /* load address */ +
2513 LEB128_SIZE /* offset */ +
2514 LEB128_SIZE /* size */ +
2515 nlen /* file name */
2518 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2519 emit_ptr (logbuffer, load_addr);
2520 emit_uvalue (logbuffer, offset);
2521 emit_uvalue (logbuffer, size);
2522 memcpy (logbuffer->cursor, filename, len);
2523 logbuffer->cursor += len;
2525 EXIT_LOG_EXPLICIT (DO_SEND);
2530 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2532 int len = strlen (name) + 1;
2534 ENTER_LOG (&sample_usyms_ctr, logbuffer,
2535 EVENT_SIZE /* event */ +
2536 LEB128_SIZE /* value */ +
2537 LEB128_SIZE /* size */ +
2541 emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2542 emit_ptr (logbuffer, (void*)value);
2543 emit_value (logbuffer, size);
2544 memcpy (logbuffer->cursor, name, len);
2545 logbuffer->cursor += len;
2547 EXIT_LOG_EXPLICIT (DO_SEND);
2550 /* ELF code crashes on some systems. */
2551 //#if defined(ELFMAG0)
2554 #if SIZEOF_VOID_P == 4
2555 #define ELF_WSIZE 32
2557 #define ELF_WSIZE 64
2560 #define ElfW(type) _ElfW (Elf, ELF_WSIZE, type)
2561 #define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
2562 #define _ElfW_1(e,w,t) e##w##t
2566 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2569 for (i = 0; i < num_symbols; ++i) {
2571 sym = strtab + symbols [i].st_name;
2572 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2574 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2575 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2580 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2587 ElfW(Shdr) *sheader;
2588 ElfW(Shdr) *shstrtabh;
2589 ElfW(Shdr) *symtabh = NULL;
2590 ElfW(Shdr) *strtabh = NULL;
2591 ElfW(Sym) *symbols = NULL;
2595 fd = open (filename, O_RDONLY);
2598 if (fstat (fd, &statb) != 0) {
2602 file_size = statb.st_size;
2603 data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2605 if (data == MAP_FAILED)
2608 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2609 header->e_ident [EI_MAG1] != ELFMAG1 ||
2610 header->e_ident [EI_MAG2] != ELFMAG2 ||
2611 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2612 munmap (data, file_size);
2615 sheader = (void*)((char*)data + header->e_shoff);
2616 shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2617 strtab = (const char*)data + shstrtabh->sh_offset;
2618 for (i = 0; i < header->e_shnum; ++i) {
2619 //printf ("section header: %d\n", sheader->sh_type);
2620 if (sheader->sh_type == SHT_SYMTAB) {
2622 strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2623 /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2626 sheader = (void*)((char*)sheader + header->e_shentsize);
2628 if (!symtabh || !strtabh) {
2629 munmap (data, file_size);
2632 strtab = (const char*)data + strtabh->sh_offset;
2633 num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2634 symbols = (void*)((char*)data + symtabh->sh_offset);
2635 dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2636 munmap (data, file_size);
2641 /* ELF code crashes on some systems. */
2642 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2645 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2647 MonoProfiler *prof = data;
2649 const char *filename;
2651 char *a = (void*)info->dlpi_addr;
2653 ElfW(Dyn) *dyn = NULL;
2654 ElfW(Sym) *symtab = NULL;
2655 ElfW(Word) *hash_table = NULL;
2656 ElfW(Ehdr) *header = NULL;
2657 const char* strtab = NULL;
2658 for (obj = prof->binary_objects; obj; obj = obj->next) {
2662 filename = info->dlpi_name;
2665 if (!info->dlpi_addr && !filename [0]) {
2666 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2672 obj = g_calloc (sizeof (BinaryObject), 1);
2673 obj->addr = (void*)info->dlpi_addr;
2674 obj->name = pstrdup (filename);
2675 obj->next = prof->binary_objects;
2676 prof->binary_objects = obj;
2677 //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2679 for (i = 0; i < info->dlpi_phnum; ++i) {
2680 //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);
2681 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2682 header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2683 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2684 header->e_ident [EI_MAG1] != ELFMAG1 ||
2685 header->e_ident [EI_MAG2] != ELFMAG2 ||
2686 header->e_ident [EI_MAG3] != ELFMAG3 ) {
2689 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);
2690 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2691 dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2694 if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2696 if (!info->dlpi_name || !info->dlpi_name[0])
2700 for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2701 if (dyn [i].d_tag == DT_SYMTAB) {
2702 symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2703 } else if (dyn [i].d_tag == DT_HASH) {
2704 hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2705 } else if (dyn [i].d_tag == DT_STRTAB) {
2706 strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2711 num_sym = hash_table [1];
2712 dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2717 load_binaries (MonoProfiler *prof)
2719 dl_iterate_phdr (elf_dl_callback, prof);
2724 load_binaries (MonoProfiler *prof)
2731 symbol_for (uintptr_t code)
2734 void *ip = (void*)code;
2736 if (dladdr (ip, &di)) {
2738 return di.dli_sname;
2741 names = backtrace_symbols (&ip, 1);
2743 const char* p = names [0];
2754 dump_unmanaged_coderefs (MonoProfiler *prof)
2757 const char* last_symbol;
2758 uintptr_t addr, page_end;
2760 if (load_binaries (prof))
2762 for (i = 0; i < size_code_pages; ++i) {
2764 if (!code_pages [i] || code_pages [i] & 1)
2767 addr = CPAGE_ADDR (code_pages [i]);
2768 page_end = addr + CPAGE_SIZE;
2769 code_pages [i] |= 1;
2770 /* we dump the symbols for the whole page */
2771 for (; addr < page_end; addr += 16) {
2772 sym = symbol_for (addr);
2773 if (sym && sym == last_symbol)
2778 dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2779 //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2784 typedef struct MonoCounterAgent {
2785 MonoCounter *counter;
2786 // MonoCounterAgent specific data :
2791 struct MonoCounterAgent *next;
2794 static MonoCounterAgent* counters;
2795 static int counters_index = 1;
2796 static mono_mutex_t counters_mutex;
2799 counters_add_agent (MonoCounter *counter)
2801 if (InterlockedRead (&in_shutdown))
2804 MonoCounterAgent *agent, *item;
2806 mono_os_mutex_lock (&counters_mutex);
2808 for (agent = counters; agent; agent = agent->next) {
2809 if (agent->counter == counter) {
2810 agent->value_size = 0;
2812 g_free (agent->value);
2813 agent->value = NULL;
2819 agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2820 agent->counter = counter;
2821 agent->value = NULL;
2822 agent->value_size = 0;
2823 agent->index = counters_index++;
2837 mono_os_mutex_unlock (&counters_mutex);
2841 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2843 counters_add_agent (counter);
2848 counters_init (MonoProfiler *profiler)
2850 mono_os_mutex_init (&counters_mutex);
2852 mono_counters_on_register (&counters_add_agent);
2853 mono_counters_foreach (counters_init_foreach_callback, NULL);
2857 counters_emit (MonoProfiler *profiler)
2859 MonoCounterAgent *agent;
2862 EVENT_SIZE /* event */ +
2863 LEB128_SIZE /* len */
2866 mono_os_mutex_lock (&counters_mutex);
2868 for (agent = counters; agent; agent = agent->next) {
2873 LEB128_SIZE /* section */ +
2874 strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2875 BYTE_SIZE /* type */ +
2876 BYTE_SIZE /* unit */ +
2877 BYTE_SIZE /* variance */ +
2878 LEB128_SIZE /* index */
2887 ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2889 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2890 emit_value (logbuffer, len);
2892 for (agent = counters; agent; agent = agent->next) {
2898 name = mono_counter_get_name (agent->counter);
2899 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2900 emit_string (logbuffer, name, strlen (name) + 1);
2901 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2902 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2903 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2904 emit_value (logbuffer, agent->index);
2909 EXIT_LOG_EXPLICIT (DO_SEND);
2912 mono_os_mutex_unlock (&counters_mutex);
2916 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2918 MonoCounterAgent *agent;
2919 MonoCounter *counter;
2925 counters_emit (profiler);
2928 buffer = g_calloc (1, buffer_size);
2930 mono_os_mutex_lock (&counters_mutex);
2933 EVENT_SIZE /* event */
2936 for (agent = counters; agent; agent = agent->next) {
2938 LEB128_SIZE /* index */ +
2939 BYTE_SIZE /* type */ +
2940 mono_counter_get_size (agent->counter) /* value */
2945 LEB128_SIZE /* stop marker */
2948 ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2950 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2952 for (agent = counters; agent; agent = agent->next) {
2955 counter = agent->counter;
2957 size = mono_counter_get_size (counter);
2959 if (size > buffer_size) {
2961 buffer = g_realloc (buffer, buffer_size);
2964 memset (buffer, 0, buffer_size);
2966 g_assert (mono_counters_sample (counter, buffer, size));
2968 type = mono_counter_get_type (counter);
2970 if (!agent->value) {
2971 agent->value = g_calloc (1, size);
2972 agent->value_size = size;
2974 if (type == MONO_COUNTER_STRING) {
2975 if (strcmp (agent->value, buffer) == 0)
2978 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2983 emit_uvalue (logbuffer, agent->index);
2984 emit_byte (logbuffer, type);
2986 case MONO_COUNTER_INT:
2987 #if SIZEOF_VOID_P == 4
2988 case MONO_COUNTER_WORD:
2990 emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2992 case MONO_COUNTER_UINT:
2993 emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2995 case MONO_COUNTER_TIME_INTERVAL:
2996 case MONO_COUNTER_LONG:
2997 #if SIZEOF_VOID_P == 8
2998 case MONO_COUNTER_WORD:
3000 emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
3002 case MONO_COUNTER_ULONG:
3003 emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
3005 case MONO_COUNTER_DOUBLE:
3006 emit_double (logbuffer, *(double*)buffer);
3008 case MONO_COUNTER_STRING:
3010 emit_byte (logbuffer, 0);
3012 emit_byte (logbuffer, 1);
3013 emit_string (logbuffer, (char*)buffer, size);
3017 g_assert_not_reached ();
3020 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
3021 agent->value = g_realloc (agent->value, size);
3022 agent->value_size = size;
3026 memcpy (agent->value, buffer, size);
3030 emit_value (logbuffer, 0);
3032 EXIT_LOG_EXPLICIT (DO_SEND);
3034 mono_os_mutex_unlock (&counters_mutex);
3037 typedef struct _PerfCounterAgent PerfCounterAgent;
3038 struct _PerfCounterAgent {
3039 PerfCounterAgent *next;
3041 char *category_name;
3050 static PerfCounterAgent *perfcounters = NULL;
3053 perfcounters_emit (MonoProfiler *profiler)
3055 PerfCounterAgent *pcagent;
3058 EVENT_SIZE /* event */ +
3059 LEB128_SIZE /* len */
3062 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3063 if (pcagent->emitted)
3067 LEB128_SIZE /* section */ +
3068 strlen (pcagent->category_name) + 1 /* category name */ +
3069 strlen (pcagent->name) + 1 /* name */ +
3070 BYTE_SIZE /* type */ +
3071 BYTE_SIZE /* unit */ +
3072 BYTE_SIZE /* variance */ +
3073 LEB128_SIZE /* index */
3082 ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3084 emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3085 emit_value (logbuffer, len);
3087 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3088 if (pcagent->emitted)
3091 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3092 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3093 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3094 emit_byte (logbuffer, MONO_COUNTER_LONG);
3095 emit_byte (logbuffer, MONO_COUNTER_RAW);
3096 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3097 emit_value (logbuffer, pcagent->index);
3099 pcagent->emitted = 1;
3102 EXIT_LOG_EXPLICIT (DO_SEND);
3106 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3108 PerfCounterAgent *pcagent;
3110 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3111 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3113 if (pcagent->value == value)
3116 pcagent->value = value;
3117 pcagent->updated = 1;
3118 pcagent->deleted = 0;
3122 pcagent = g_new0 (PerfCounterAgent, 1);
3123 pcagent->next = perfcounters;
3124 pcagent->index = counters_index++;
3125 pcagent->category_name = g_strdup (category_name);
3126 pcagent->name = g_strdup (name);
3127 pcagent->type = (int) type;
3128 pcagent->value = value;
3129 pcagent->emitted = 0;
3130 pcagent->updated = 1;
3131 pcagent->deleted = 0;
3133 perfcounters = pcagent;
3139 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3141 PerfCounterAgent *pcagent;
3145 mono_os_mutex_lock (&counters_mutex);
3147 /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3148 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3149 pcagent->deleted = 1;
3151 mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3153 perfcounters_emit (profiler);
3156 EVENT_SIZE /* event */
3159 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3160 if (pcagent->deleted || !pcagent->updated)
3164 LEB128_SIZE /* index */ +
3165 BYTE_SIZE /* type */ +
3166 LEB128_SIZE /* value */
3176 LEB128_SIZE /* stop marker */
3179 ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3181 emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3183 for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3184 if (pcagent->deleted || !pcagent->updated)
3186 emit_uvalue (logbuffer, pcagent->index);
3187 emit_byte (logbuffer, MONO_COUNTER_LONG);
3188 emit_svalue (logbuffer, pcagent->value);
3190 pcagent->updated = 0;
3193 emit_value (logbuffer, 0);
3195 EXIT_LOG_EXPLICIT (DO_SEND);
3198 mono_os_mutex_unlock (&counters_mutex);
3202 counters_and_perfcounters_sample (MonoProfiler *prof)
3204 uint64_t now = current_time ();
3206 counters_sample (prof, now);
3207 perfcounters_sample (prof, now);
3210 static mono_mutex_t coverage_mutex;
3211 static MonoConcurrentHashTable *coverage_methods = NULL;
3212 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3213 static MonoConcurrentHashTable *coverage_classes = NULL;
3215 static MonoConcurrentHashTable *filtered_classes = NULL;
3216 static MonoConcurrentHashTable *image_to_methods = NULL;
3217 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3218 static gboolean coverage_initialized = FALSE;
3220 static GPtrArray *coverage_data = NULL;
3221 static int previous_offset = 0;
3224 MonoLockFreeQueueNode node;
3237 free_coverage_entry (gpointer data, gpointer userdata)
3239 CoverageEntry *entry = (CoverageEntry *)data;
3240 g_free (entry->filename);
3245 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfilerCoverageData *entry)
3247 int offset = entry->il_offset - previous_offset;
3248 CoverageEntry *e = g_new (CoverageEntry, 1);
3250 previous_offset = entry->il_offset;
3253 e->counter = entry->counter;
3254 e->filename = g_strdup(entry->file_name ? entry->file_name : "");
3255 e->line = entry->line;
3256 e->column = entry->column;
3258 g_ptr_array_add (coverage_data, e);
3262 parse_generic_type_names(char *name)
3264 char *new_name, *ret;
3265 int within_generic_declaration = 0, generic_members = 1;
3267 if (name == NULL || *name == '\0')
3268 return g_strdup ("");
3270 if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3276 within_generic_declaration = 1;
3280 within_generic_declaration = 0;
3282 if (*(name - 1) != '<') {
3284 *new_name++ = '0' + generic_members;
3286 memcpy (new_name, "<>", 8);
3290 generic_members = 0;
3298 if (!within_generic_declaration)
3299 *new_name++ = *name;
3308 static int method_id;
3310 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3312 MonoMethod *method = (MonoMethod *)value;
3313 MonoProfiler *prof = (MonoProfiler *)userdata;
3317 const char *image_name, *method_name, *sig, *first_filename;
3320 previous_offset = 0;
3321 coverage_data = g_ptr_array_new ();
3323 mono_profiler_get_coverage_data (prof->handle, method, obtain_coverage_for_method);
3325 klass = mono_method_get_class (method);
3326 image = mono_class_get_image (klass);
3327 image_name = mono_image_get_name (image);
3329 sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3330 class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3331 method_name = mono_method_get_name (method);
3333 if (coverage_data->len != 0) {
3334 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3335 first_filename = entry->filename ? entry->filename : "";
3337 first_filename = "";
3339 image_name = image_name ? image_name : "";
3340 sig = sig ? sig : "";
3341 method_name = method_name ? method_name : "";
3343 ENTER_LOG (&coverage_methods_ctr, logbuffer,
3344 EVENT_SIZE /* event */ +
3345 strlen (image_name) + 1 /* image name */ +
3346 strlen (class_name) + 1 /* class name */ +
3347 strlen (method_name) + 1 /* method name */ +
3348 strlen (sig) + 1 /* signature */ +
3349 strlen (first_filename) + 1 /* first file name */ +
3350 LEB128_SIZE /* token */ +
3351 LEB128_SIZE /* method id */ +
3352 LEB128_SIZE /* entries */
3355 emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3356 emit_string (logbuffer, image_name, strlen (image_name) + 1);
3357 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3358 emit_string (logbuffer, method_name, strlen (method_name) + 1);
3359 emit_string (logbuffer, sig, strlen (sig) + 1);
3360 emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3362 emit_uvalue (logbuffer, mono_method_get_token (method));
3363 emit_uvalue (logbuffer, method_id);
3364 emit_value (logbuffer, coverage_data->len);
3366 EXIT_LOG_EXPLICIT (DO_SEND);
3368 for (i = 0; i < coverage_data->len; i++) {
3369 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3371 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3372 EVENT_SIZE /* event */ +
3373 LEB128_SIZE /* method id */ +
3374 LEB128_SIZE /* offset */ +
3375 LEB128_SIZE /* counter */ +
3376 LEB128_SIZE /* line */ +
3377 LEB128_SIZE /* column */
3380 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3381 emit_uvalue (logbuffer, method_id);
3382 emit_uvalue (logbuffer, entry->offset);
3383 emit_uvalue (logbuffer, entry->counter);
3384 emit_uvalue (logbuffer, entry->line);
3385 emit_uvalue (logbuffer, entry->column);
3387 EXIT_LOG_EXPLICIT (DO_SEND);
3392 g_free (class_name);
3394 g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3395 g_ptr_array_free (coverage_data, TRUE);
3396 coverage_data = NULL;
3399 /* This empties the queue */
3401 count_queue (MonoLockFreeQueue *queue)
3403 MonoLockFreeQueueNode *node;
3406 while ((node = mono_lock_free_queue_dequeue (queue))) {
3408 mono_thread_hazardous_try_free (node, g_free);
3415 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3417 MonoClass *klass = (MonoClass *)key;
3418 MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3421 const char *assembly_name;
3422 int number_of_methods, partially_covered;
3423 guint fully_covered;
3425 image = mono_class_get_image (klass);
3426 assembly_name = mono_image_get_name (image);
3427 class_name = mono_type_get_name (mono_class_get_type (klass));
3429 assembly_name = assembly_name ? assembly_name : "";
3430 number_of_methods = mono_class_num_methods (klass);
3431 fully_covered = count_queue (class_methods);
3432 /* We don't handle partial covered yet */
3433 partially_covered = 0;
3435 ENTER_LOG (&coverage_classes_ctr, logbuffer,
3436 EVENT_SIZE /* event */ +
3437 strlen (assembly_name) + 1 /* assembly name */ +
3438 strlen (class_name) + 1 /* class name */ +
3439 LEB128_SIZE /* no. methods */ +
3440 LEB128_SIZE /* fully covered */ +
3441 LEB128_SIZE /* partially covered */
3444 emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3445 emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3446 emit_string (logbuffer, class_name, strlen (class_name) + 1);
3447 emit_uvalue (logbuffer, number_of_methods);
3448 emit_uvalue (logbuffer, fully_covered);
3449 emit_uvalue (logbuffer, partially_covered);
3451 EXIT_LOG_EXPLICIT (DO_SEND);
3453 g_free (class_name);
3457 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3459 MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3461 *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3463 *fully_covered = count_queue (image_methods);
3467 // FIXME: We don't handle partially covered yet.
3468 *partially_covered = 0;
3472 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3474 MonoAssembly *assembly = (MonoAssembly *)value;
3475 MonoImage *image = mono_assembly_get_image (assembly);
3476 const char *name, *guid, *filename;
3477 int number_of_methods = 0, partially_covered = 0;
3478 guint fully_covered = 0;
3480 name = mono_image_get_name (image);
3481 guid = mono_image_get_guid (image);
3482 filename = mono_image_get_filename (image);
3484 name = name ? name : "";
3485 guid = guid ? guid : "";
3486 filename = filename ? filename : "";
3488 get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3490 ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3491 EVENT_SIZE /* event */ +
3492 strlen (name) + 1 /* name */ +
3493 strlen (guid) + 1 /* guid */ +
3494 strlen (filename) + 1 /* file name */ +
3495 LEB128_SIZE /* no. methods */ +
3496 LEB128_SIZE /* fully covered */ +
3497 LEB128_SIZE /* partially covered */
3500 emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3501 emit_string (logbuffer, name, strlen (name) + 1);
3502 emit_string (logbuffer, guid, strlen (guid) + 1);
3503 emit_string (logbuffer, filename, strlen (filename) + 1);
3504 emit_uvalue (logbuffer, number_of_methods);
3505 emit_uvalue (logbuffer, fully_covered);
3506 emit_uvalue (logbuffer, partially_covered);
3508 EXIT_LOG_EXPLICIT (DO_SEND);
3512 dump_coverage (MonoProfiler *prof)
3514 if (!coverage_initialized)
3519 mono_os_mutex_lock (&coverage_mutex);
3520 mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3521 mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3522 mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3523 mono_os_mutex_unlock (&coverage_mutex);
3526 static MonoLockFreeQueueNode *
3527 create_method_node (MonoMethod *method)
3529 MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3530 mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3531 node->method = method;
3533 return (MonoLockFreeQueueNode *) node;
3537 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3542 MonoAssembly *assembly;
3543 MonoMethodHeader *header;
3544 guint32 iflags, flags, code_size;
3545 char *fqn, *classname;
3546 gboolean has_positive, found;
3547 MonoLockFreeQueue *image_methods, *class_methods;
3548 MonoLockFreeQueueNode *node;
3550 g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3552 flags = mono_method_get_flags (method, &iflags);
3553 if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3554 (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/))
3557 // Don't need to do anything else if we're already tracking this method
3558 if (mono_conc_hashtable_lookup (coverage_methods, method))
3561 klass = mono_method_get_class (method);
3562 image = mono_class_get_image (klass);
3564 // Don't handle coverage for the core assemblies
3565 if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3568 if (prof->coverage_filters) {
3569 /* Check already filtered classes first */
3570 if (mono_conc_hashtable_lookup (filtered_classes, klass))
3573 classname = mono_type_get_name (mono_class_get_type (klass));
3575 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3577 // Check positive filters first
3578 has_positive = FALSE;
3580 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3581 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3583 if (filter [0] == '+') {
3584 filter = &filter [1];
3586 if (strstr (fqn, filter) != NULL)
3589 has_positive = TRUE;
3593 if (has_positive && !found) {
3594 mono_os_mutex_lock (&coverage_mutex);
3595 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3596 mono_os_mutex_unlock (&coverage_mutex);
3603 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3604 // FIXME: Is substring search sufficient?
3605 char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3606 if (filter [0] == '+')
3610 filter = &filter [1];
3612 if (strstr (fqn, filter) != NULL) {
3613 mono_os_mutex_lock (&coverage_mutex);
3614 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3615 mono_os_mutex_unlock (&coverage_mutex);
3627 header = mono_method_get_header_checked (method, &error);
3628 mono_error_cleanup (&error);
3630 mono_method_header_get_code (header, &code_size, NULL);
3632 assembly = mono_image_get_assembly (image);
3634 // Need to keep the assemblies around for as long as they are kept in the hashtable
3635 // Nunit, for example, has a habit of unloading them before the coverage statistics are
3636 // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3637 mono_assembly_addref (assembly);
3639 mono_os_mutex_lock (&coverage_mutex);
3640 mono_conc_hashtable_insert (coverage_methods, method, method);
3641 mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3642 mono_os_mutex_unlock (&coverage_mutex);
3644 image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3646 if (image_methods == NULL) {
3647 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3648 mono_lock_free_queue_init (image_methods);
3649 mono_os_mutex_lock (&coverage_mutex);
3650 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3651 mono_os_mutex_unlock (&coverage_mutex);
3654 node = create_method_node (method);
3655 mono_lock_free_queue_enqueue (image_methods, node);
3657 class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3659 if (class_methods == NULL) {
3660 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3661 mono_lock_free_queue_init (class_methods);
3662 mono_os_mutex_lock (&coverage_mutex);
3663 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3664 mono_os_mutex_unlock (&coverage_mutex);
3667 node = create_method_node (method);
3668 mono_lock_free_queue_enqueue (class_methods, node);
3673 #define LINE_BUFFER_SIZE 4096
3674 /* Max file limit of 128KB */
3675 #define MAX_FILE_SIZE 128 * 1024
3677 get_file_content (FILE *stream)
3682 int res, offset = 0;
3684 res = fseek (stream, 0, SEEK_END);
3688 filesize = ftell (stream);
3692 res = fseek (stream, 0, SEEK_SET);
3696 if (filesize > MAX_FILE_SIZE)
3699 buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3700 while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3701 offset += bytes_read;
3703 /* NULL terminate our buffer */
3704 buffer[filesize] = '\0';
3709 get_next_line (char *contents, char **next_start)
3713 if (p == NULL || *p == '\0') {
3718 while (*p != '\n' && *p != '\0')
3723 *next_start = p + 1;
3731 init_suppressed_assemblies (void)
3737 suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3738 sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3739 if (sa_file == NULL)
3742 /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3743 content = get_file_content (sa_file);
3744 if (content == NULL) {
3745 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3748 while ((line = get_next_line (content, &content))) {
3749 line = g_strchomp (g_strchug (line));
3750 /* No locking needed as we're doing initialization */
3751 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3758 parse_cov_filter_file (GPtrArray *filters, const char *file)
3761 char *line, *content;
3763 filter_file = fopen (file, "r");
3764 if (filter_file == NULL) {
3765 fprintf (stderr, "Unable to open %s\n", file);
3769 /* Don't need to free content as it is referred to by the lines stored in @filters */
3770 content = get_file_content (filter_file);
3771 if (content == NULL)
3772 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3774 while ((line = get_next_line (content, &content)))
3775 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3777 fclose (filter_file);
3781 coverage_init (MonoProfiler *prof)
3783 g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3785 mono_os_mutex_init (&coverage_mutex);
3786 coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3787 coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3788 coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3789 filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3790 image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3791 init_suppressed_assemblies ();
3793 coverage_initialized = TRUE;
3797 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3799 MonoAssembly *assembly = (MonoAssembly *)value;
3800 mono_assembly_close (assembly);
3804 free_sample_hit (gpointer p)
3806 mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3810 cleanup_reusable_samples (MonoProfiler *prof)
3814 while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3815 mono_thread_hazardous_try_free (sample, free_sample_hit);
3819 log_shutdown (MonoProfiler *prof)
3821 InterlockedWrite (&in_shutdown, 1);
3824 counters_and_perfcounters_sample (prof);
3826 dump_coverage (prof);
3830 if (write (prof->pipes [1], &c, 1) != 1) {
3831 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3835 mono_native_thread_join (prof->helper_thread);
3837 mono_os_mutex_destroy (&counters_mutex);
3839 MonoCounterAgent *mc_next;
3841 for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3842 mc_next = cur->next;
3846 PerfCounterAgent *pc_next;
3848 for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3849 pc_next = cur->next;
3854 * Ensure that we empty the LLS completely, even if some nodes are
3855 * not immediately removed upon calling mono_lls_remove (), by
3856 * iterating until the head is NULL.
3858 while (profiler_thread_list.head) {
3859 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3860 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3862 remove_thread (thread);
3863 } MONO_LLS_FOREACH_SAFE_END
3867 * Ensure that all threads have been freed, so that we don't miss any
3868 * buffers when we shut down the writer thread below.
3870 mono_thread_hazardous_try_free_all ();
3872 InterlockedWrite (&prof->run_dumper_thread, 0);
3873 mono_os_sem_post (&prof->dumper_queue_sem);
3874 mono_native_thread_join (prof->dumper_thread);
3875 mono_os_sem_destroy (&prof->dumper_queue_sem);
3877 InterlockedWrite (&prof->run_writer_thread, 0);
3878 mono_os_sem_post (&prof->writer_queue_sem);
3879 mono_native_thread_join (prof->writer_thread);
3880 mono_os_sem_destroy (&prof->writer_queue_sem);
3883 * Free all writer queue entries, and ensure that all sample hits will be
3884 * added to the sample reuse queue.
3886 mono_thread_hazardous_try_free_all ();
3888 cleanup_reusable_samples (prof);
3891 * Finally, make sure that all sample hits are freed. This should cover all
3892 * hazardous data from the profiler. We can now be sure that the runtime
3893 * won't later invoke free functions in the profiler library after it has
3896 mono_thread_hazardous_try_free_all ();
3898 gint32 state = InterlockedRead (&buffer_lock_state);
3900 g_assert (!(state & 0xFFFF) && "Why is the reader count still non-zero?");
3901 g_assert (!(state >> 16) && "Why is the exclusive lock still held?");
3903 #if defined (HAVE_SYS_ZLIB)
3905 gzclose (prof->gzfile);
3907 if (prof->pipe_output)
3908 pclose (prof->file);
3910 fclose (prof->file);
3912 mono_conc_hashtable_destroy (prof->method_table);
3913 mono_os_mutex_destroy (&prof->method_table_mutex);
3915 if (coverage_initialized) {
3916 mono_os_mutex_lock (&coverage_mutex);
3917 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3918 mono_os_mutex_unlock (&coverage_mutex);
3920 mono_conc_hashtable_destroy (coverage_methods);
3921 mono_conc_hashtable_destroy (coverage_assemblies);
3922 mono_conc_hashtable_destroy (coverage_classes);
3923 mono_conc_hashtable_destroy (filtered_classes);
3925 mono_conc_hashtable_destroy (image_to_methods);
3926 mono_conc_hashtable_destroy (suppressed_assemblies);
3927 mono_os_mutex_destroy (&coverage_mutex);
3932 g_free (prof->args);
3937 new_filename (const char* filename)
3939 time_t t = time (NULL);
3940 int pid = process_id ();
3945 int count_dates = 0;
3949 for (p = filename; *p; p++) {
3960 if (!count_dates && !count_pids)
3961 return pstrdup (filename);
3962 snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3964 snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3965 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3966 s_date = strlen (time_buf);
3967 s_pid = strlen (pid_buf);
3968 d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3969 for (p = filename; *p; p++) {
3976 strcpy (d, time_buf);
3979 } else if (*p == 'p') {
3980 strcpy (d, pid_buf);
3983 } else if (*p == '%') {
3996 add_to_fd_set (fd_set *set, int fd, int *max_fd)
3999 * This should only trigger for the basic FDs (server socket, pipes) at
4000 * startup if for some mysterious reason they're too large. In this case,
4001 * the profiler really can't function, and we're better off printing an
4002 * error and exiting.
4004 if (fd >= FD_SETSIZE) {
4005 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4016 helper_thread (void *arg)
4018 MonoProfiler *prof = (MonoProfiler *) arg;
4020 mono_threads_attach_tools_thread ();
4021 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4023 MonoProfilerThread *thread = init_thread (prof, FALSE);
4025 GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4033 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4034 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4036 for (gint i = 0; i < command_sockets->len; i++)
4037 add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4039 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4041 // Sleep for 1sec or until a file descriptor has data.
4042 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4046 fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4051 counters_and_perfcounters_sample (prof);
4053 buffer_lock_excl ();
4055 sync_point (SYNC_POINT_PERIODIC);
4057 buffer_unlock_excl ();
4059 // Are we shutting down?
4060 if (FD_ISSET (prof->pipes [0], &rfds)) {
4062 read (prof->pipes [0], &c, 1);
4066 for (gint i = 0; i < command_sockets->len; i++) {
4067 int fd = g_array_index (command_sockets, int, i);
4069 if (!FD_ISSET (fd, &rfds))
4073 int len = read (fd, buf, sizeof (buf) - 1);
4079 // The other end disconnected.
4080 g_array_remove_index (command_sockets, i);
4088 if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4089 // Rely on the finalization callback triggering a GC.
4090 heapshot_requested = 1;
4091 mono_gc_finalize_notify ();
4095 if (FD_ISSET (prof->server_socket, &rfds)) {
4096 int fd = accept (prof->server_socket, NULL, NULL);
4099 if (fd >= FD_SETSIZE)
4102 g_array_append_val (command_sockets, fd);
4107 for (gint i = 0; i < command_sockets->len; i++)
4108 close (g_array_index (command_sockets, int, i));
4110 g_array_free (command_sockets, TRUE);
4112 send_log_unsafe (FALSE);
4113 deinit_thread (thread);
4115 mono_thread_info_detach ();
4121 start_helper_thread (MonoProfiler* prof)
4123 if (pipe (prof->pipes) == -1) {
4124 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4128 prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4130 if (prof->server_socket == -1) {
4131 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4135 struct sockaddr_in server_address;
4137 memset (&server_address, 0, sizeof (server_address));
4138 server_address.sin_family = AF_INET;
4139 server_address.sin_addr.s_addr = INADDR_ANY;
4140 server_address.sin_port = htons (prof->command_port);
4142 if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4143 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4144 close (prof->server_socket);
4148 if (listen (prof->server_socket, 1) == -1) {
4149 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4150 close (prof->server_socket);
4154 socklen_t slen = sizeof (server_address);
4156 if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4157 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4158 close (prof->server_socket);
4162 prof->command_port = ntohs (server_address.sin_port);
4164 if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4165 fprintf (stderr, "Could not start helper thread\n");
4166 close (prof->server_socket);
4172 free_writer_entry (gpointer p)
4174 mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4178 handle_writer_queue_entry (MonoProfiler *prof)
4180 WriterQueueEntry *entry;
4182 if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4183 if (!entry->methods)
4186 gboolean wrote_methods = FALSE;
4189 * Encode the method events in a temporary log buffer that we
4190 * flush to disk before the main buffer, ensuring that all
4191 * methods have metadata emitted before they're referenced.
4193 * We use a 'proper' thread-local buffer for this as opposed
4194 * to allocating and freeing a buffer by hand because the call
4195 * to mono_method_full_name () below may trigger class load
4196 * events when it retrieves the signature of the method. So a
4197 * thread-local buffer needs to exist when such events occur.
4199 for (guint i = 0; i < entry->methods->len; i++) {
4200 MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4202 if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4203 goto free_info; // This method already has metadata emitted.
4206 * Other threads use this hash table to get a general
4207 * idea of whether a method has already been emitted to
4208 * the stream. Due to the way we add to this table, it
4209 * can easily happen that multiple threads queue up the
4210 * same methods, but that's OK since eventually all
4211 * methods will be in this table and the thread-local
4212 * method lists will just be empty for the rest of the
4215 mono_os_mutex_lock (&prof->method_table_mutex);
4216 mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4217 mono_os_mutex_unlock (&prof->method_table_mutex);
4219 char *name = mono_method_full_name (info->method, 1);
4220 int nlen = strlen (name) + 1;
4221 void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4222 int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4224 ENTER_LOG (&method_jits_ctr, logbuffer,
4225 EVENT_SIZE /* event */ +
4226 LEB128_SIZE /* method */ +
4227 LEB128_SIZE /* start */ +
4228 LEB128_SIZE /* size */ +
4232 emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4233 emit_method_inner (logbuffer, info->method);
4234 emit_ptr (logbuffer, cstart);
4235 emit_value (logbuffer, csize);
4237 memcpy (logbuffer->cursor, name, nlen);
4238 logbuffer->cursor += nlen;
4240 EXIT_LOG_EXPLICIT (NO_SEND);
4244 wrote_methods = TRUE;
4250 g_ptr_array_free (entry->methods, TRUE);
4252 if (wrote_methods) {
4253 MonoProfilerThread *thread = PROF_TLS_GET ();
4255 dump_buffer_threadless (prof, thread->buffer);
4256 init_buffer_state (thread);
4260 dump_buffer (prof, entry->buffer);
4262 mono_thread_hazardous_try_free (entry, free_writer_entry);
4271 writer_thread (void *arg)
4273 MonoProfiler *prof = (MonoProfiler *)arg;
4275 mono_threads_attach_tools_thread ();
4276 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4280 MonoProfilerThread *thread = init_thread (prof, FALSE);
4282 while (InterlockedRead (&prof->run_writer_thread)) {
4283 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4284 handle_writer_queue_entry (prof);
4287 /* Drain any remaining entries on shutdown. */
4288 while (handle_writer_queue_entry (prof));
4290 free_buffer (thread->buffer, thread->buffer->size);
4291 deinit_thread (thread);
4293 mono_thread_info_detach ();
4299 start_writer_thread (MonoProfiler* prof)
4301 InterlockedWrite (&prof->run_writer_thread, 1);
4303 if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4304 fprintf (stderr, "Could not start writer thread\n");
4310 reuse_sample_hit (gpointer p)
4312 SampleHit *sample = p;
4314 mono_lock_free_queue_node_unpoison (&sample->node);
4315 mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4319 handle_dumper_queue_entry (MonoProfiler *prof)
4323 if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4324 for (int i = 0; i < sample->count; ++i) {
4325 MonoMethod *method = sample->frames [i].method;
4326 MonoDomain *domain = sample->frames [i].domain;
4327 void *address = sample->frames [i].base_address;
4330 g_assert (domain && "What happened to the domain pointer?");
4331 g_assert (address && "What happened to the instruction pointer?");
4333 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4336 sample->frames [i].method = mono_jit_info_get_method (ji);
4340 ENTER_LOG (&sample_hits_ctr, logbuffer,
4341 EVENT_SIZE /* event */ +
4342 LEB128_SIZE /* tid */ +
4343 LEB128_SIZE /* count */ +
4345 LEB128_SIZE /* ip */
4347 LEB128_SIZE /* managed count */ +
4349 LEB128_SIZE /* method */
4353 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4354 emit_ptr (logbuffer, (void *) sample->tid);
4355 emit_value (logbuffer, 1);
4357 // TODO: Actual native unwinding.
4358 for (int i = 0; i < 1; ++i) {
4359 emit_ptr (logbuffer, sample->ip);
4360 add_code_pointer ((uintptr_t) sample->ip);
4363 /* new in data version 6 */
4364 emit_uvalue (logbuffer, sample->count);
4366 for (int i = 0; i < sample->count; ++i)
4367 emit_method (logbuffer, sample->frames [i].method);
4369 EXIT_LOG_EXPLICIT (DO_SEND);
4371 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4373 dump_unmanaged_coderefs (prof);
4380 dumper_thread (void *arg)
4382 MonoProfiler *prof = (MonoProfiler *)arg;
4384 mono_threads_attach_tools_thread ();
4385 mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4387 MonoProfilerThread *thread = init_thread (prof, FALSE);
4389 while (InterlockedRead (&prof->run_dumper_thread)) {
4391 * Flush samples every second so it doesn't seem like the profiler is
4392 * not working if the program is mostly idle.
4394 if (mono_os_sem_timedwait (&prof->dumper_queue_sem, 1000, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_TIMEDOUT)
4395 send_log_unsafe (FALSE);
4397 handle_dumper_queue_entry (prof);
4400 /* Drain any remaining entries on shutdown. */
4401 while (handle_dumper_queue_entry (prof));
4403 send_log_unsafe (FALSE);
4404 deinit_thread (thread);
4406 mono_thread_info_detach ();
4412 start_dumper_thread (MonoProfiler* prof)
4414 InterlockedWrite (&prof->run_dumper_thread, 1);
4416 if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4417 fprintf (stderr, "Could not start dumper thread\n");
4423 register_counter (const char *name, gint32 *counter)
4425 mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4429 runtime_initialized (MonoProfiler *profiler)
4431 InterlockedWrite (&runtime_inited, 1);
4433 register_counter ("Sample events allocated", &sample_allocations_ctr);
4434 register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4436 register_counter ("Event: Sync points", &sync_points_ctr);
4437 register_counter ("Event: Heap objects", &heap_objects_ctr);
4438 register_counter ("Event: Heap starts", &heap_starts_ctr);
4439 register_counter ("Event: Heap ends", &heap_ends_ctr);
4440 register_counter ("Event: Heap roots", &heap_roots_ctr);
4441 register_counter ("Event: GC events", &gc_events_ctr);
4442 register_counter ("Event: GC resizes", &gc_resizes_ctr);
4443 register_counter ("Event: GC allocations", &gc_allocs_ctr);
4444 register_counter ("Event: GC moves", &gc_moves_ctr);
4445 register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4446 register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4447 register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4448 register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4449 register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4450 register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4451 register_counter ("Event: Image loads", &image_loads_ctr);
4452 register_counter ("Event: Image unloads", &image_unloads_ctr);
4453 register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4454 register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4455 register_counter ("Event: Class loads", &class_loads_ctr);
4456 register_counter ("Event: Class unloads", &class_unloads_ctr);
4457 register_counter ("Event: Method entries", &method_entries_ctr);
4458 register_counter ("Event: Method exits", &method_exits_ctr);
4459 register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4460 register_counter ("Event: Method JITs", &method_jits_ctr);
4461 register_counter ("Event: Code buffers", &code_buffers_ctr);
4462 register_counter ("Event: Exception throws", &exception_throws_ctr);
4463 register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4464 register_counter ("Event: Monitor events", &monitor_events_ctr);
4465 register_counter ("Event: Thread starts", &thread_starts_ctr);
4466 register_counter ("Event: Thread ends", &thread_ends_ctr);
4467 register_counter ("Event: Thread names", &thread_names_ctr);
4468 register_counter ("Event: Domain loads", &domain_loads_ctr);
4469 register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4470 register_counter ("Event: Domain names", &domain_names_ctr);
4471 register_counter ("Event: Context loads", &context_loads_ctr);
4472 register_counter ("Event: Context unloads", &context_unloads_ctr);
4473 register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4474 register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4475 register_counter ("Event: Sample hits", &sample_hits_ctr);
4476 register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4477 register_counter ("Event: Counter samples", &counter_samples_ctr);
4478 register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4479 register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4480 register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4481 register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4482 register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4483 register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4485 counters_init (profiler);
4488 * We must start the helper thread before the writer thread. This is
4489 * because the helper thread sets up the command port which is written to
4490 * the log header by the writer thread.
4492 start_helper_thread (profiler);
4493 start_writer_thread (profiler);
4494 start_dumper_thread (profiler);
4498 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4501 int force_delete = 0;
4503 log_profiler = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4504 log_profiler->args = pstrdup (args);
4505 log_profiler->command_port = command_port;
4507 if (filename && *filename == '-') {
4510 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4513 //If filename begin with +, append the pid at the end
4514 if (filename && *filename == '+')
4515 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4520 filename = "|mprof-report -";
4522 filename = "output.mlpd";
4523 nf = (char*)filename;
4525 nf = new_filename (filename);
4527 int s = strlen (nf) + 32;
4528 char *p = (char *) g_malloc (s);
4529 snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4535 log_profiler->file = popen (nf + 1, "w");
4536 log_profiler->pipe_output = 1;
4537 } else if (*nf == '#') {
4538 int fd = strtol (nf + 1, NULL, 10);
4539 log_profiler->file = fdopen (fd, "a");
4543 log_profiler->file = fopen (nf, "wb");
4545 if (!log_profiler->file) {
4546 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4550 #if defined (HAVE_SYS_ZLIB)
4552 log_profiler->gzfile = gzdopen (fileno (log_profiler->file), "wb");
4556 * If you hit this assert while increasing MAX_FRAMES, you need to increase
4557 * SAMPLE_BLOCK_SIZE as well.
4559 g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4561 // FIXME: We should free this stuff too.
4562 mono_lock_free_allocator_init_size_class (&log_profiler->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4563 mono_lock_free_allocator_init_allocator (&log_profiler->sample_allocator, &log_profiler->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4565 mono_lock_free_queue_init (&log_profiler->sample_reuse_queue);
4567 g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4569 // FIXME: We should free this stuff too.
4570 mono_lock_free_allocator_init_size_class (&log_profiler->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4571 mono_lock_free_allocator_init_allocator (&log_profiler->writer_entry_allocator, &log_profiler->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4573 mono_lock_free_queue_init (&log_profiler->writer_queue);
4574 mono_os_sem_init (&log_profiler->writer_queue_sem, 0);
4576 mono_lock_free_queue_init (&log_profiler->dumper_queue);
4577 mono_os_sem_init (&log_profiler->dumper_queue_sem, 0);
4579 mono_os_mutex_init (&log_profiler->method_table_mutex);
4580 log_profiler->method_table = mono_conc_hashtable_new (NULL, NULL);
4583 coverage_init (log_profiler);
4584 log_profiler->coverage_filters = filters;
4586 log_profiler->startup_time = current_time ();
4590 * declaration to silence the compiler: this is the entry point that
4591 * mono will load from the shared library and call.
4594 mono_profiler_init (const char *desc);
4597 mono_profiler_init_log (const char *desc);
4600 * this is the entry point that will be used when the profiler
4601 * is embedded inside the main executable.
4604 mono_profiler_init_log (const char *desc)
4606 mono_profiler_init (desc);
4610 mono_profiler_init (const char *desc)
4612 GPtrArray *filters = NULL;
4614 proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4616 //XXX maybe later cleanup to use config directly
4617 nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4618 no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4619 do_report = config.do_report;
4620 do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4621 hs_mode_ondemand = config.hs_mode_ondemand;
4622 hs_mode_ms = config.hs_mode_ms;
4623 hs_mode_gc = config.hs_mode_gc;
4624 do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4625 use_zip = config.use_zip;
4626 command_port = config.command_port;
4627 num_frames = config.num_frames;
4628 notraces = config.notraces;
4629 max_allocated_sample_hits = config.max_allocated_sample_hits;
4630 max_call_depth = config.max_call_depth;
4631 do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4633 if (config.cov_filter_files) {
4634 filters = g_ptr_array_new ();
4636 for (i = 0; i < config.cov_filter_files->len; ++i) {
4637 const char *name = config.cov_filter_files->pdata [i];
4638 parse_cov_filter_file (filters, name);
4646 create_profiler (desc, config.output_filename, filters);
4648 mono_lls_init (&profiler_thread_list, NULL);
4650 MonoProfilerHandle handle = log_profiler->handle = mono_profiler_install (log_profiler);
4652 //Required callbacks
4653 mono_profiler_set_runtime_shutdown_end_callback (handle, log_shutdown);
4654 mono_profiler_set_runtime_initialized_callback (handle, runtime_initialized);
4656 mono_profiler_set_gc_event_callback (handle, gc_event);
4657 mono_profiler_set_gc_resize_callback (handle, gc_resize);
4658 mono_profiler_set_thread_started_callback (handle, thread_start);
4659 mono_profiler_set_thread_stopped_callback (handle, thread_end);
4661 //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4662 mono_profiler_set_thread_name_callback (handle, thread_name);
4664 if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4665 mono_profiler_set_domain_loaded_callback (handle, domain_loaded);
4666 mono_profiler_set_domain_unloading_callback (handle, domain_unloaded);
4667 mono_profiler_set_domain_name_callback (handle, domain_name);
4670 if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4671 mono_profiler_set_assembly_loaded_callback (handle, assembly_loaded);
4672 mono_profiler_set_assembly_unloading_callback (handle, assembly_unloaded);
4675 if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4676 mono_profiler_set_image_loaded_callback (handle, image_loaded);
4677 mono_profiler_set_image_unloading_callback (handle, image_unloaded);
4680 if (config.effective_mask & PROFLOG_CLASS_EVENTS)
4681 mono_profiler_set_class_loaded_callback (handle, class_loaded);
4683 if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4684 mono_profiler_set_jit_done_callback (handle, method_jitted);
4685 mono_profiler_set_jit_code_buffer_callback (handle, code_buffer_new);
4688 if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4689 mono_profiler_set_exception_throw_callback (handle, throw_exc);
4690 mono_profiler_set_exception_clause_callback (handle, clause_exc);
4693 if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4694 mono_profiler_enable_allocations ();
4695 mono_profiler_set_gc_allocation_callback (handle, gc_alloc);
4698 //PROFLOG_GC_EVENTS is mandatory
4699 //PROFLOG_THREAD_EVENTS is mandatory
4701 if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4702 mono_profiler_set_call_instrumentation_filter_callback (handle, method_filter);
4703 mono_profiler_set_method_enter_callback (handle, method_enter);
4704 mono_profiler_set_method_leave_callback (handle, method_leave);
4705 mono_profiler_set_method_exception_leave_callback (handle, method_exc_leave);
4708 if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS)
4709 mono_profiler_set_coverage_filter_callback (handle, coverage_filter);
4711 if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4712 mono_profiler_enable_sampling (handle);
4714 if (!mono_profiler_set_sample_mode (handle, config.sampling_mode, config.sample_freq))
4715 g_warning ("Another profiler controls sampling parameters; the log profiler will not be able to modify them");
4717 mono_profiler_set_sample_hit_callback (handle, mono_sample_hit);
4720 if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4721 mono_profiler_set_monitor_contention_callback (handle, monitor_contention);
4722 mono_profiler_set_monitor_acquired_callback (handle, monitor_acquired);
4723 mono_profiler_set_monitor_failed_callback (handle, monitor_failed);
4726 if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS)
4727 mono_profiler_set_gc_moves_callback (handle, gc_moves);
4729 if (config.effective_mask & PROFLOG_GC_ROOT_EVENTS)
4730 mono_profiler_set_gc_roots_callback (handle, gc_roots);
4732 if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4733 mono_profiler_set_context_loaded_callback (handle, context_loaded);
4734 mono_profiler_set_context_unloaded_callback (handle, context_unloaded);
4737 if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4738 mono_profiler_set_gc_finalizing_callback (handle, finalize_begin);
4739 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4740 mono_profiler_set_gc_finalizing_object_callback (handle, finalize_object_begin);
4741 mono_profiler_set_gc_finalized_object_callback (handle, finalize_object_end);
4742 } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4743 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4744 mono_profiler_set_gc_finalized_callback (handle, finalize_end);
4747 //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4749 if (config.effective_mask & PROFLOG_GC_HANDLE_EVENTS) {
4750 mono_profiler_set_gc_handle_created_callback (handle, gc_handle_created);
4751 mono_profiler_set_gc_handle_deleted_callback (handle, gc_handle_deleted);