2 * proflog.c: mono log profiler
5 * Paolo Molaro (lupus@ximian.com)
7 * Copyright 2010 Novell, Inc (http://www.novell.com)
11 #include <mono/metadata/profiler.h>
12 #include <mono/metadata/threads.h>
13 #include <mono/metadata/mono-gc.h>
14 #include <mono/metadata/debug-helpers.h>
23 #if defined(HOST_WIN32) || defined(DISABLE_SOCKETS)
24 #define DISABLE_HELPER_THREAD 1
33 #ifdef HAVE_EXECINFO_H
40 #ifndef DISABLE_HELPER_THREAD
41 #include <sys/types.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <sys/select.h>
53 #ifdef HAVE_SYS_STAT_H
60 #if defined (HAVE_SYS_ZLIB)
64 /* the architecture needs a memory fence */
65 #if defined(__linux__) && (defined(__i386__) || defined(__x86_64__))
66 #include "perf_event.h"
67 #define USE_PERF_EVENTS 1
68 static int read_perf_mmap (MonoProfiler* prof);
71 #define BUFFER_SIZE (4096 * 16)
72 static int nocalls = 0;
73 static int notraces = 0;
74 static int use_zip = 0;
75 static int do_report = 0;
76 static int do_heap_shot = 0;
77 static int max_call_depth = 100;
78 static int runtime_inited = 0;
79 static int command_port = 0;
80 static int heapshot_requested = 0;
81 static int sample_type = 0;
82 static int sample_freq = 0;
83 static int do_mono_sample = 0;
84 static int in_shutdown = 0;
85 static int do_debug = 0;
87 /* For linux compile with:
88 * gcc -fPIC -shared -o libmono-profiler-log.so proflog.c utils.c -Wall -g -lz `pkg-config --cflags --libs mono-2`
89 * gcc -o mprof-report decode.c utils.c -Wall -g -lz -lrt -lpthread `pkg-config --cflags mono-2`
91 * For osx compile with:
92 * gcc -m32 -Dmono_free=free shared -o libmono-profiler-log.dylib proflog.c utils.c -Wall -g -lz `pkg-config --cflags mono-2` -undefined suppress -flat_namespace
93 * gcc -m32 -o mprof-report decode.c utils.c -Wall -g -lz -lrt -lpthread `pkg-config --cflags mono-2`
96 * sudo cp mprof-report /usr/local/bin
97 * sudo cp libmono-profiler-log.so /usr/local/lib
101 typedef struct _LogBuffer LogBuffer;
107 * The file is composed by a header followed by 0 or more buffers.
108 * Each buffer contains events that happened on a thread: for a given thread
109 * buffers that appear later in the file are guaranteed to contain events
110 * that happened later in time. Buffers from separate threads could be interleaved,
112 * Buffers are not required to be aligned.
115 * [id: 4 bytes] constant value: LOG_HEADER_ID
116 * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
117 * [format: 1 byte] version of the data format for the rest of the file
118 * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
119 * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
120 * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
121 * [flags: 4 bytes] file format flags, should be 0 for now
122 * [pid: 4 bytes] pid of the profiled process
123 * [port: 2 bytes] tcp port for server if != 0
124 * [sysid: 2 bytes] operating system and architecture identifier
126 * The multiple byte integers are in little-endian format.
129 * [buffer header] [event]*
130 * Buffers have a fixed-size header followed by 0 or more bytes of event data.
131 * Timing information and other values in the event data are usually stored
132 * as uleb128 or sleb128 integers. To save space, as noted for each item below,
133 * some data is represented as a difference between the actual value and
134 * either the last value of the same type (like for timing information) or
135 * as the difference from a value stored in a buffer header.
137 * For timing information the data is stored as uleb128, since timing
138 * increases in a monotonic way in each thread: the value is the number of
139 * nanoseconds to add to the last seen timing data in a buffer. The first value
140 * in a buffer will be calculated from the time_base field in the buffer head.
142 * Object or heap sizes are stored as uleb128.
143 * Pointer differences are stored as sleb128, instead.
145 * If an unexpected value is found, the rest of the buffer should be ignored,
146 * as generally the later values need the former to be interpreted correctly.
148 * buffer header format:
149 * [bufid: 4 bytes] constant value: BUF_ID
150 * [len: 4 bytes] size of the data following the buffer header
151 * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
152 * [ptr_base: 8 bytes] base value for pointers
153 * [obj_base: 8 bytes] base value for object addresses
154 * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
155 * [method_base: 8 bytes] base value for MonoMethod pointers
158 * [extended info: upper 4 bits] [type: lower 4 bits] [data]*
159 * The data that follows depends on type and the extended info.
160 * Type is one of the enum values in proflog.h: TYPE_ALLOC, TYPE_GC,
161 * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
162 * The extended info bits are interpreted based on type, see
163 * each individual event description below.
164 * strings are represented as a 0-terminated utf8 sequence.
167 * [flags: uleb128] must be 0
168 * [num: uleb128] number of frames following
169 * [frame: sleb128]* num MonoMethod pointers as differences from ptr_base
173 * exinfo: flags: TYPE_ALLOC_BT
174 * [time diff: uleb128] nanoseconds since last timing
175 * [ptr: sleb128] class as a byte difference from ptr_base
176 * [obj: sleb128] object address as a byte difference from obj_base
177 * [size: uleb128] size of the object in the heap
178 * If the TYPE_ALLOC_BT flag is set, a backtrace follows.
182 * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED,
183 * TYPE_GC_HANDLE_DESTROYED
184 * [time diff: uleb128] nanoseconds since last timing
185 * if exinfo == TYPE_GC_RESIZE
186 * [heap_size: uleb128] new heap size
187 * if exinfo == TYPE_GC_EVENT
188 * [event type: uleb128] GC event (MONO_GC_EVENT_* from profiler.h)
189 * [generation: uleb128] GC generation event refers to
190 * if exinfo == TYPE_GC_MOVE
191 * [num_objects: uleb128] number of object moves that follow
192 * [objaddr: sleb128]+ num_objects object pointer differences from obj_base
193 * num is always an even number: the even items are the old
194 * addresses, the odd numbers are the respective new object addresses
195 * if exinfo == TYPE_GC_HANDLE_CREATED
196 * [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
197 * upper bits reserved as flags
198 * [handle: uleb128] GC handle value
199 * [objaddr: sleb128] object pointer differences from obj_base
200 * if exinfo == TYPE_GC_HANDLE_DESTROYED
201 * [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
202 * upper bits reserved as flags
203 * [handle: uleb128] GC handle value
205 * type metadata format:
206 * type: TYPE_METADATA
207 * exinfo: flags: TYPE_LOAD_ERR
208 * [time diff: uleb128] nanoseconds since last timing
209 * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
211 * [pointer: sleb128] pointer of the metadata type depending on mtype
212 * if mtype == TYPE_CLASS
213 * [image: sleb128] MonoImage* as a pointer difference from ptr_base
214 * [flags: uleb128] must be 0
215 * [name: string] full class name
216 * if mtype == TYPE_IMAGE
217 * [flags: uleb128] must be 0
218 * [name: string] image file name
219 * if mtype == TYPE_THREAD
220 * [flags: uleb128] must be 0
221 * [name: string] thread name
223 * type method format:
225 * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
226 * [time diff: uleb128] nanoseconds since last timing
227 * [method: sleb128] MonoMethod* as a pointer difference from the last such
228 * pointer or the buffer method_base
229 * if exinfo == TYPE_JIT
230 * [code address: sleb128] pointer to the native code as a diff from ptr_base
231 * [code size: uleb128] size of the generated code
232 * [name: string] full method name
234 * type exception format:
235 * type: TYPE_EXCEPTION
236 * exinfo: TYPE_EXCEPTION_BT flag and one of: TYPE_THROW, TYPE_CLAUSE
237 * [time diff: uleb128] nanoseconds since last timing
238 * if exinfo.low3bits == TYPE_CLAUSE
239 * [clause type: uleb128] finally/catch/fault/filter
240 * [clause num: uleb128] the clause number in the method header
241 * [method: sleb128] MonoMethod* as a pointer difference from the last such
242 * pointer or the buffer method_base
243 * if exinfo.low3bits == TYPE_THROW
244 * [object: sleb128] the object that was thrown as a difference from obj_base
245 * If the TYPE_EXCEPTION_BT flag is set, a backtrace follows.
247 * type monitor format:
249 * exinfo: TYPE_MONITOR_BT flag and one of: MONO_PROFILER_MONITOR_(CONTENTION|FAIL|DONE)
250 * [time diff: uleb128] nanoseconds since last timing
251 * [object: sleb128] the lock object as a difference from obj_base
252 * if exinfo.low3bits == MONO_PROFILER_MONITOR_CONTENTION
253 * If the TYPE_MONITOR_BT flag is set, a backtrace follows.
257 * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
258 * if exinfo == TYPE_HEAP_START
259 * [time diff: uleb128] nanoseconds since last timing
260 * if exinfo == TYPE_HEAP_END
261 * [time diff: uleb128] nanoseconds since last timing
262 * if exinfo == TYPE_HEAP_OBJECT
263 * [object: sleb128] the object as a difference from obj_base
264 * [class: sleb128] the object MonoClass* as a difference from ptr_base
265 * [size: uleb128] size of the object on the heap
266 * [num_refs: uleb128] number of object references
267 * if (format version > 1) each referenced objref is preceded by a
268 * uleb128 encoded offset: the first offset is from the object address
269 * and each next offset is relative to the previous one
270 * [objrefs: sleb128]+ object referenced as a difference from obj_base
271 * The same object can appear multiple times, but only the first time
272 * with size != 0: in the other cases this data will only be used to
273 * provide additional referenced objects.
274 * if exinfo == TYPE_HEAP_ROOT
275 * [num_roots: uleb128] number of root references
276 * [num_gc: uleb128] number of major gcs
277 * [object: sleb128] the object as a difference from obj_base
278 * [root_type: uleb128] the root_type: MonoProfileGCRootType (profiler.h)
279 * [extra_info: uleb128] the extra_info value
280 * object, root_type_extra_info are repeated num_roots times
284 * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN
285 * if exinfo == TYPE_SAMPLE_HIT
286 * [sample_type: uleb128] type of sample (SAMPLE_*)
287 * [timestamp: uleb128] nanoseconds since startup (note: different from other timestamps!)
288 * [count: uleb128] number of following instruction addresses
289 * [ip: sleb128]* instruction pointer as difference from ptr_base
290 * if exinfo == TYPE_SAMPLE_USYM
291 * [address: sleb128] symbol address as a difference from ptr_base
292 * [size: uleb128] symbol size (may be 0 if unknown)
293 * [name: string] symbol name
294 * if exinfo == TYPE_SAMPLE_UBIN
295 * [time diff: uleb128] nanoseconds since last timing
296 * [address: sleb128] address where binary has been loaded
297 * [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
298 * [size: uleb128] memory size
299 * [name: string] binary name
307 uintptr_t method_base;
308 uintptr_t last_method;
311 unsigned char* data_end;
316 unsigned char buf [1];
319 #define ENTER_LOG(lb,str) if ((lb)->locked) {write(2, str, strlen(str)); write(2, "\n", 1);return;} else {(lb)->locked++;}
320 #define EXIT_LOG(lb) (lb)->locked--;
322 typedef struct _StatBuffer StatBuffer;
331 typedef struct _BinaryObject BinaryObject;
333 struct _BinaryObject {
339 struct _MonoProfiler {
341 StatBuffer *stat_buffers;
343 #if defined (HAVE_SYS_ZLIB)
346 uint64_t startup_time;
348 int last_gc_gen_started;
353 pthread_t helper_thread;
355 BinaryObject *binary_objects;
359 #define TLS_SET(x,y) TlsSetValue(x, y)
360 #define TLS_GET(x) ((LogBuffer *) TlsGetValue(x))
361 #define TLS_INIT(x) x = TlsAlloc ()
362 static int tlsbuffer;
364 #define TLS_SET(x,y) x = y
367 static __thread LogBuffer* tlsbuffer = NULL;
369 #define TLS_SET(x,y) pthread_setspecific(x, y)
370 #define TLS_GET(x) ((LogBuffer *) pthread_getspecific(x))
371 #define TLS_INIT(x) pthread_key_create(&x, NULL)
372 static pthread_key_t tlsbuffer;
376 pstrdup (const char *s)
378 int len = strlen (s) + 1;
379 char *p = malloc (len);
385 create_stat_buffer (void)
387 StatBuffer* buf = alloc_buffer (BUFFER_SIZE);
388 buf->size = BUFFER_SIZE;
389 buf->data_end = (uintptr_t*)((unsigned char*)buf + buf->size);
390 buf->data = buf->buf;
397 LogBuffer* buf = alloc_buffer (BUFFER_SIZE);
398 buf->size = BUFFER_SIZE;
399 buf->time_base = current_time ();
400 buf->last_time = buf->time_base;
401 buf->data_end = (unsigned char*)buf + buf->size;
402 buf->data = buf->buf;
409 LogBuffer *logbuffer;
410 if (TLS_GET (tlsbuffer))
412 logbuffer = create_buffer ();
413 TLS_SET (tlsbuffer, logbuffer);
414 logbuffer->thread_id = thread_id ();
415 //printf ("thread %p at time %llu\n", (void*)logbuffer->thread_id, logbuffer->time_base);
419 ensure_logbuf (int bytes)
421 LogBuffer *old = TLS_GET (tlsbuffer);
422 if (old && old->data + bytes + 100 < old->data_end)
424 TLS_SET (tlsbuffer, NULL);
426 TLS_GET (tlsbuffer)->next = old;
428 TLS_GET (tlsbuffer)->call_depth = old->call_depth;
429 //printf ("new logbuffer\n");
430 return TLS_GET (tlsbuffer);
434 emit_byte (LogBuffer *logbuffer, int value)
436 logbuffer->data [0] = value;
438 assert (logbuffer->data <= logbuffer->data_end);
442 emit_value (LogBuffer *logbuffer, int value)
444 encode_uleb128 (value, logbuffer->data, &logbuffer->data);
445 assert (logbuffer->data <= logbuffer->data_end);
449 emit_time (LogBuffer *logbuffer, uint64_t value)
451 uint64_t tdiff = value - logbuffer->last_time;
453 if (value < logbuffer->last_time)
454 printf ("time went backwards\n");
455 //if (tdiff > 1000000)
456 // printf ("large time offset: %llu\n", tdiff);
458 encode_uleb128 (tdiff, logbuffer->data, &logbuffer->data);
459 /*if (tdiff != decode_uleb128 (p, &p))
460 printf ("incorrect encoding: %llu\n", tdiff);*/
461 logbuffer->last_time = value;
462 assert (logbuffer->data <= logbuffer->data_end);
466 emit_svalue (LogBuffer *logbuffer, int64_t value)
468 encode_sleb128 (value, logbuffer->data, &logbuffer->data);
469 assert (logbuffer->data <= logbuffer->data_end);
473 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
475 encode_uleb128 (value, logbuffer->data, &logbuffer->data);
476 assert (logbuffer->data <= logbuffer->data_end);
480 emit_ptr (LogBuffer *logbuffer, void *ptr)
482 if (!logbuffer->ptr_base)
483 logbuffer->ptr_base = (uintptr_t)ptr;
484 emit_svalue (logbuffer, (intptr_t)ptr - logbuffer->ptr_base);
485 assert (logbuffer->data <= logbuffer->data_end);
489 emit_method (LogBuffer *logbuffer, void *method)
491 if (!logbuffer->method_base) {
492 logbuffer->method_base = (intptr_t)method;
493 logbuffer->last_method = (intptr_t)method;
495 encode_sleb128 ((intptr_t)((char*)method - (char*)logbuffer->last_method), logbuffer->data, &logbuffer->data);
496 logbuffer->last_method = (intptr_t)method;
497 assert (logbuffer->data <= logbuffer->data_end);
501 emit_obj (LogBuffer *logbuffer, void *ptr)
503 if (!logbuffer->obj_base)
504 logbuffer->obj_base = (uintptr_t)ptr >> 3;
505 emit_svalue (logbuffer, ((uintptr_t)ptr >> 3) - logbuffer->obj_base);
506 assert (logbuffer->data <= logbuffer->data_end);
510 write_int16 (char *buf, int32_t value)
513 for (i = 0; i < 2; ++i) {
521 write_int32 (char *buf, int32_t value)
524 for (i = 0; i < 4; ++i) {
532 write_int64 (char *buf, int64_t value)
535 for (i = 0; i < 8; ++i) {
543 dump_header (MonoProfiler *profiler)
547 p = write_int32 (p, LOG_HEADER_ID);
548 *p++ = LOG_VERSION_MAJOR;
549 *p++ = LOG_VERSION_MINOR;
550 *p++ = LOG_DATA_VERSION;
551 *p++ = sizeof (void*);
552 p = write_int64 (p, ((uint64_t)time (NULL)) * 1000); /* startup time */
553 p = write_int32 (p, get_timer_overhead ()); /* timer overhead */
554 p = write_int32 (p, 0); /* flags */
555 p = write_int32 (p, process_id ()); /* pid */
556 p = write_int16 (p, profiler->command_port); /* port */
557 p = write_int16 (p, 0); /* opsystem */
558 #if defined (HAVE_SYS_ZLIB)
559 if (profiler->gzfile) {
560 gzwrite (profiler->gzfile, hbuf, p - hbuf);
562 fwrite (hbuf, p - hbuf, 1, profiler->file);
565 fwrite (hbuf, p - hbuf, 1, profiler->file);
570 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
575 dump_buffer (profiler, buf->next);
576 p = write_int32 (p, BUF_ID);
577 p = write_int32 (p, buf->data - buf->buf);
578 p = write_int64 (p, buf->time_base);
579 p = write_int64 (p, buf->ptr_base);
580 p = write_int64 (p, buf->obj_base);
581 p = write_int64 (p, buf->thread_id);
582 p = write_int64 (p, buf->method_base);
583 #if defined (HAVE_SYS_ZLIB)
584 if (profiler->gzfile) {
585 gzwrite (profiler->gzfile, hbuf, p - hbuf);
586 gzwrite (profiler->gzfile, buf->buf, buf->data - buf->buf);
589 fwrite (hbuf, p - hbuf, 1, profiler->file);
590 fwrite (buf->buf, buf->data - buf->buf, 1, profiler->file);
591 #if defined (HAVE_SYS_ZLIB)
594 free_buffer (buf, buf->size);
598 process_requests (MonoProfiler *profiler)
600 if (heapshot_requested)
601 mono_gc_collect (mono_gc_max_generation ());
605 runtime_initialized (MonoProfiler *profiler)
611 * Can be called only at safe callback locations.
614 safe_dump (MonoProfiler *profiler, LogBuffer *logbuffer)
616 int cd = logbuffer->call_depth;
618 dump_buffer (profiler, TLS_GET (tlsbuffer));
620 TLS_SET (tlsbuffer, NULL);
622 TLS_GET (tlsbuffer)->call_depth = cd;
626 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
629 uintptr_t last_offset = 0;
630 //const char *name = mono_class_get_name (klass);
631 LogBuffer *logbuffer = ensure_logbuf (20 + num * 8);
632 emit_byte (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
633 emit_obj (logbuffer, obj);
634 emit_ptr (logbuffer, klass);
635 /* account for object alignment in the heap */
638 emit_value (logbuffer, size);
639 emit_value (logbuffer, num);
640 for (i = 0; i < num; ++i) {
641 emit_value (logbuffer, offsets [i] - last_offset);
642 last_offset = offsets [i];
643 emit_obj (logbuffer, refs [i]);
646 // printf ("obj: %p, klass: %s, refs: %d, size: %d\n", obj, name, (int)num, (int)size);
650 static unsigned int hs_mode_ms = 0;
651 static unsigned int hs_mode_gc = 0;
652 static unsigned int hs_mode_ondemand = 0;
653 static unsigned int gc_count = 0;
654 static uint64_t last_hs_time = 0;
657 heap_walk (MonoProfiler *profiler)
661 LogBuffer *logbuffer;
664 logbuffer = ensure_logbuf (10);
665 now = current_time ();
666 if (hs_mode_ms && (now - last_hs_time)/1000000 >= hs_mode_ms)
668 else if (hs_mode_gc && (gc_count % hs_mode_gc) == 0)
670 else if (hs_mode_ondemand && heapshot_requested)
672 else if (!hs_mode_ms && !hs_mode_gc && profiler->last_gc_gen_started == mono_gc_max_generation ())
677 heapshot_requested = 0;
678 emit_byte (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
679 emit_time (logbuffer, now);
680 mono_gc_walk_heap (0, gc_reference, NULL);
681 logbuffer = ensure_logbuf (10);
682 now = current_time ();
683 emit_byte (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
684 emit_time (logbuffer, now);
689 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation) {
691 LogBuffer *logbuffer = ensure_logbuf (10);
692 now = current_time ();
693 ENTER_LOG (logbuffer, "gcevent");
694 emit_byte (logbuffer, TYPE_GC_EVENT | TYPE_GC);
695 emit_time (logbuffer, now);
696 emit_value (logbuffer, ev);
697 emit_value (logbuffer, generation);
698 /* to deal with nested gen1 after gen0 started */
699 if (ev == MONO_GC_EVENT_START) {
700 profiler->last_gc_gen_started = generation;
701 if (generation == mono_gc_max_generation ())
704 if (ev == MONO_GC_EVENT_PRE_START_WORLD)
705 heap_walk (profiler);
706 EXIT_LOG (logbuffer);
707 if (ev == MONO_GC_EVENT_POST_START_WORLD)
708 safe_dump (profiler, logbuffer);
709 //printf ("gc event %d for generation %d\n", ev, generation);
713 gc_resize (MonoProfiler *profiler, int64_t new_size) {
715 LogBuffer *logbuffer = ensure_logbuf (10);
716 now = current_time ();
717 ENTER_LOG (logbuffer, "gcresize");
718 emit_byte (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
719 emit_time (logbuffer, now);
720 emit_value (logbuffer, new_size);
721 //printf ("gc resized to %lld\n", new_size);
722 EXIT_LOG (logbuffer);
725 #define MAX_FRAMES 16
728 MonoMethod* methods [MAX_FRAMES];
730 static int num_frames = MAX_FRAMES / 2;
733 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
735 FrameData *frame = data;
736 if (method && frame->count < num_frames) {
737 frame->methods [frame->count++] = method;
738 //printf ("In %d %s\n", frame->count, mono_method_get_name (method));
740 return frame->count == num_frames;
744 * a note about stack walks: they can cause more profiler events to fire,
745 * so we need to make sure they don't happen after we started emitting an
746 * event, hence the collect_bt/emit_bt split.
749 collect_bt (FrameData *data)
752 mono_stack_walk_no_il (walk_stack, data);
756 emit_bt (LogBuffer *logbuffer, FrameData *data)
758 /* FIXME: this is actually tons of data and we should
759 * just output it the first time and use an id the next
761 if (data->count > num_frames)
762 printf ("bad num frames: %d\n", data->count);
763 emit_value (logbuffer, 0); /* flags */
764 emit_value (logbuffer, data->count);
765 //if (*p != data.count) {
766 // printf ("bad num frames enc at %d: %d -> %d\n", count, data.count, *p); printf ("frames end: %p->%p\n", p, logbuffer->data); exit(0);}
767 while (data->count) {
768 emit_ptr (logbuffer, data->methods [--data->count]);
773 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
777 int do_bt = (nocalls && runtime_inited && !notraces)? TYPE_ALLOC_BT: 0;
779 LogBuffer *logbuffer;
780 len = mono_object_get_size (obj);
781 /* account for object alignment in the heap */
786 logbuffer = ensure_logbuf (32 + MAX_FRAMES * 8);
787 now = current_time ();
788 ENTER_LOG (logbuffer, "gcalloc");
789 emit_byte (logbuffer, do_bt | TYPE_ALLOC);
790 emit_time (logbuffer, now);
791 emit_ptr (logbuffer, klass);
792 emit_obj (logbuffer, obj);
793 emit_value (logbuffer, len);
795 emit_bt (logbuffer, &data);
796 EXIT_LOG (logbuffer);
798 safe_dump (prof, logbuffer);
799 process_requests (prof);
800 //printf ("gc alloc %s at %p\n", mono_class_get_name (klass), obj);
804 gc_moves (MonoProfiler *prof, void **objects, int num)
808 LogBuffer *logbuffer = ensure_logbuf (10 + num * 8);
809 now = current_time ();
810 ENTER_LOG (logbuffer, "gcmove");
811 emit_byte (logbuffer, TYPE_GC_MOVE | TYPE_GC);
812 emit_time (logbuffer, now);
813 emit_value (logbuffer, num);
814 for (i = 0; i < num; ++i)
815 emit_obj (logbuffer, objects [i]);
816 //printf ("gc moved %d objects\n", num/2);
817 EXIT_LOG (logbuffer);
821 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
824 LogBuffer *logbuffer = ensure_logbuf (5 + num * 18);
825 ENTER_LOG (logbuffer, "gcroots");
826 emit_byte (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
827 emit_value (logbuffer, num);
828 emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
829 for (i = 0; i < num; ++i) {
830 emit_obj (logbuffer, objects [i]);
831 emit_value (logbuffer, root_types [i]);
832 emit_value (logbuffer, extra_info [i]);
834 EXIT_LOG (logbuffer);
838 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
841 LogBuffer *logbuffer = ensure_logbuf (16);
842 now = current_time ();
843 ENTER_LOG (logbuffer, "gchandle");
844 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
845 emit_byte (logbuffer, TYPE_GC_HANDLE_CREATED | TYPE_GC);
846 else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
847 emit_byte (logbuffer, TYPE_GC_HANDLE_DESTROYED | TYPE_GC);
850 emit_time (logbuffer, now);
851 emit_value (logbuffer, type);
852 emit_value (logbuffer, handle);
853 if (op == MONO_PROFILER_GC_HANDLE_CREATED)
854 emit_obj (logbuffer, obj);
855 EXIT_LOG (logbuffer);
856 process_requests (prof);
860 push_nesting (char *p, MonoClass *klass)
865 nesting = mono_class_get_nesting_type (klass);
867 p = push_nesting (p, nesting);
871 name = mono_class_get_name (klass);
872 nspace = mono_class_get_namespace (klass);
875 p += strlen (nspace);
885 type_name (MonoClass *klass)
889 push_nesting (buf, klass);
890 p = malloc (strlen (buf) + 1);
896 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
901 LogBuffer *logbuffer;
902 if (result != MONO_PROFILE_OK)
904 name = mono_image_get_filename (image);
905 nlen = strlen (name) + 1;
906 logbuffer = ensure_logbuf (16 + nlen);
907 now = current_time ();
908 ENTER_LOG (logbuffer, "image");
909 emit_byte (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
910 emit_time (logbuffer, now);
911 emit_byte (logbuffer, TYPE_IMAGE);
912 emit_ptr (logbuffer, image);
913 emit_value (logbuffer, 0); /* flags */
914 memcpy (logbuffer->data, name, nlen);
915 logbuffer->data += nlen;
916 //printf ("loaded image %p (%s)\n", image, name);
917 EXIT_LOG (logbuffer);
919 safe_dump (prof, logbuffer);
920 process_requests (prof);
924 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
930 LogBuffer *logbuffer;
931 if (result != MONO_PROFILE_OK)
934 name = mono_type_get_name (mono_class_get_type (klass));
936 name = type_name (klass);
937 nlen = strlen (name) + 1;
938 image = mono_class_get_image (klass);
939 logbuffer = ensure_logbuf (24 + nlen);
940 now = current_time ();
941 ENTER_LOG (logbuffer, "class");
942 emit_byte (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
943 emit_time (logbuffer, now);
944 emit_byte (logbuffer, TYPE_CLASS);
945 emit_ptr (logbuffer, klass);
946 emit_ptr (logbuffer, image);
947 emit_value (logbuffer, 0); /* flags */
948 memcpy (logbuffer->data, name, nlen);
949 logbuffer->data += nlen;
950 //printf ("loaded class %p (%s)\n", klass, name);
955 EXIT_LOG (logbuffer);
957 safe_dump (prof, logbuffer);
958 process_requests (prof);
962 method_enter (MonoProfiler *prof, MonoMethod *method)
965 LogBuffer *logbuffer = ensure_logbuf (16);
966 if (logbuffer->call_depth++ > max_call_depth)
968 now = current_time ();
969 ENTER_LOG (logbuffer, "enter");
970 emit_byte (logbuffer, TYPE_ENTER | TYPE_METHOD);
971 emit_time (logbuffer, now);
972 emit_method (logbuffer, method);
973 EXIT_LOG (logbuffer);
974 process_requests (prof);
978 method_leave (MonoProfiler *prof, MonoMethod *method)
981 LogBuffer *logbuffer = ensure_logbuf (16);
982 if (--logbuffer->call_depth > max_call_depth)
984 now = current_time ();
985 ENTER_LOG (logbuffer, "leave");
986 emit_byte (logbuffer, TYPE_LEAVE | TYPE_METHOD);
987 emit_time (logbuffer, now);
988 emit_method (logbuffer, method);
989 EXIT_LOG (logbuffer);
991 safe_dump (prof, logbuffer);
992 process_requests (prof);
996 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
999 LogBuffer *logbuffer;
1002 logbuffer = ensure_logbuf (16);
1003 if (--logbuffer->call_depth > max_call_depth)
1005 now = current_time ();
1006 ENTER_LOG (logbuffer, "eleave");
1007 emit_byte (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
1008 emit_time (logbuffer, now);
1009 emit_method (logbuffer, method);
1010 EXIT_LOG (logbuffer);
1011 process_requests (prof);
1015 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo* jinfo, int result)
1020 LogBuffer *logbuffer;
1021 if (result != MONO_PROFILE_OK)
1023 name = mono_method_full_name (method, 1);
1024 nlen = strlen (name) + 1;
1025 logbuffer = ensure_logbuf (32 + nlen);
1026 now = current_time ();
1027 ENTER_LOG (logbuffer, "jit");
1028 emit_byte (logbuffer, TYPE_JIT | TYPE_METHOD);
1029 emit_time (logbuffer, now);
1030 emit_method (logbuffer, method);
1031 emit_ptr (logbuffer, mono_jit_info_get_code_start (jinfo));
1032 emit_value (logbuffer, mono_jit_info_get_code_size (jinfo));
1033 memcpy (logbuffer->data, name, nlen);
1034 logbuffer->data += nlen;
1036 EXIT_LOG (logbuffer);
1037 if (logbuffer->next)
1038 safe_dump (prof, logbuffer);
1039 process_requests (prof);
1043 throw_exc (MonoProfiler *prof, MonoObject *object)
1045 int do_bt = (nocalls && runtime_inited && !notraces)? TYPE_EXCEPTION_BT: 0;
1048 LogBuffer *logbuffer;
1051 logbuffer = ensure_logbuf (16 + MAX_FRAMES * 8);
1052 now = current_time ();
1053 ENTER_LOG (logbuffer, "throw");
1054 emit_byte (logbuffer, do_bt | TYPE_EXCEPTION);
1055 emit_time (logbuffer, now);
1056 emit_obj (logbuffer, object);
1058 emit_bt (logbuffer, &data);
1059 EXIT_LOG (logbuffer);
1060 process_requests (prof);
1064 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num)
1067 LogBuffer *logbuffer = ensure_logbuf (16);
1068 now = current_time ();
1069 ENTER_LOG (logbuffer, "clause");
1070 emit_byte (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
1071 emit_time (logbuffer, now);
1072 emit_value (logbuffer, clause_type);
1073 emit_value (logbuffer, clause_num);
1074 emit_method (logbuffer, method);
1075 EXIT_LOG (logbuffer);
1079 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent event)
1081 int do_bt = (nocalls && runtime_inited && !notraces && event == MONO_PROFILER_MONITOR_CONTENTION)? TYPE_MONITOR_BT: 0;
1084 LogBuffer *logbuffer;
1087 logbuffer = ensure_logbuf (16 + MAX_FRAMES * 8);
1088 now = current_time ();
1089 ENTER_LOG (logbuffer, "monitor");
1090 emit_byte (logbuffer, (event << 4) | do_bt | TYPE_MONITOR);
1091 emit_time (logbuffer, now);
1092 emit_obj (logbuffer, object);
1094 emit_bt (logbuffer, &data);
1095 EXIT_LOG (logbuffer);
1096 process_requests (profiler);
1100 thread_start (MonoProfiler *prof, uintptr_t tid)
1102 //printf ("thread start %p\n", (void*)tid);
1107 thread_end (MonoProfiler *prof, uintptr_t tid)
1110 if (TLS_GET (tlsbuffer))
1111 dump_buffer (prof, TLS_GET (tlsbuffer));
1113 TLS_SET (tlsbuffer, NULL);
1117 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
1119 int len = strlen (name) + 1;
1121 LogBuffer *logbuffer;
1122 logbuffer = ensure_logbuf (10 + len);
1123 now = current_time ();
1124 ENTER_LOG (logbuffer, "tname");
1125 emit_byte (logbuffer, TYPE_METADATA);
1126 emit_time (logbuffer, now);
1127 emit_byte (logbuffer, TYPE_THREAD);
1128 emit_ptr (logbuffer, (void*)tid);
1129 emit_value (logbuffer, 0); /* flags */
1130 memcpy (logbuffer->data, name, len);
1131 logbuffer->data += len;
1132 EXIT_LOG (logbuffer);
1136 #include "mono/io-layer/atomic.h"
1138 #define cmp_exchange InterlockedCompareExchangePointer
1141 cmp_exchange (volatile void **dest, void *exch, void *comp)
1144 __asm__ __volatile__ ("lock; "
1151 : "=m" (*dest), "=a" (old)
1152 : "r" (exch), "m" (*dest), "a" (comp));
1159 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
1163 uintptr_t *data, *new_data, *old_data;
1166 now = current_time ();
1170 snprintf (buf, sizeof (buf), "hit at %p in thread %p at %llu\n", ip, (void*)thread_id (), (unsigned long long int)now);
1172 write (2, buf, len);
1174 sbuf = profiler->stat_buffers;
1178 if (sbuf->data + 400 >= sbuf->data_end) {
1179 sbuf = create_stat_buffer ();
1180 sbuf->next = profiler->stat_buffers;
1181 profiler->stat_buffers = sbuf;
1183 write (2, "overflow\n", 9);
1184 /* notify the helper thread */
1185 if (sbuf->next->next) {
1187 write (profiler->pipes [1], &c, 1);
1189 write (2, "notify\n", 7);
1193 old_data = sbuf->data;
1194 new_data = old_data + 4;
1195 data = cmp_exchange ((volatile void**)&sbuf->data, new_data, old_data);
1196 } while (data != old_data);
1197 if (old_data >= sbuf->data_end)
1198 return; /* lost event */
1199 old_data [0] = 1 | (sample_type << 16);
1200 old_data [1] = thread_id ();
1201 old_data [2] = (now - profiler->startup_time) / 10000;
1202 old_data [3] = (uintptr_t)ip;
1205 static uintptr_t *code_pages = 0;
1206 static int num_code_pages = 0;
1207 static int size_code_pages = 0;
1208 #define CPAGE_SHIFT (9)
1209 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
1210 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
1211 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
1214 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
1217 uintptr_t start_pos;
1218 start_pos = (page >> CPAGE_SHIFT) % hsize;
1221 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
1223 } else if (!hash [i]) {
1230 } while (i != start_pos);
1231 /* should not happen */
1232 printf ("failed code page store\n");
1237 add_code_pointer (uintptr_t ip)
1240 if (num_code_pages * 2 >= size_code_pages) {
1242 uintptr_t old_size = size_code_pages;
1243 size_code_pages *= 2;
1244 if (size_code_pages == 0)
1245 size_code_pages = 16;
1246 n = calloc (sizeof (uintptr_t) * size_code_pages, 1);
1247 for (i = 0; i < old_size; ++i) {
1249 add_code_page (n, size_code_pages, code_pages [i]);
1255 num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
1259 dump_ubin (const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
1262 LogBuffer *logbuffer;
1264 len = strlen (filename) + 1;
1265 now = current_time ();
1266 logbuffer = ensure_logbuf (20 + len);
1267 emit_byte (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
1268 emit_time (logbuffer, now);
1269 emit_svalue (logbuffer, load_addr);
1270 emit_uvalue (logbuffer, offset);
1271 emit_uvalue (logbuffer, size);
1272 memcpy (logbuffer->data, filename, len);
1273 logbuffer->data += len;
1277 dump_usym (const char *name, uintptr_t value, uintptr_t size)
1279 LogBuffer *logbuffer;
1281 len = strlen (name) + 1;
1282 logbuffer = ensure_logbuf (20 + len);
1283 emit_byte (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
1284 emit_ptr (logbuffer, (void*)value);
1285 emit_value (logbuffer, size);
1286 memcpy (logbuffer->data, name, len);
1287 logbuffer->data += len;
1292 #if SIZEOF_VOID_P == 4
1293 #define ELF_WSIZE 32
1295 #define ELF_WSIZE 64
1298 #define ElfW(type) _ElfW (Elf, ELF_WSIZE, type)
1299 #define _ElfW(e,w,t) _ElfW_1 (e, w, _##t)
1300 #define _ElfW_1(e,w,t) e##w##t
1304 dump_elf_symbols (ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
1307 for (i = 0; i < num_symbols; ++i) {
1309 sym = strtab + symbols [i].st_name;
1310 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
1312 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
1313 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
1318 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
1325 ElfW(Shdr) *sheader;
1326 ElfW(Shdr) *shstrtabh;
1327 ElfW(Shdr) *symtabh = NULL;
1328 ElfW(Shdr) *strtabh = NULL;
1329 ElfW(Sym) *symbols = NULL;
1333 fd = open (filename, O_RDONLY);
1336 if (fstat (fd, &statb) != 0) {
1340 file_size = statb.st_size;
1341 data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
1343 if (data == MAP_FAILED)
1346 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
1347 header->e_ident [EI_MAG1] != ELFMAG1 ||
1348 header->e_ident [EI_MAG2] != ELFMAG2 ||
1349 header->e_ident [EI_MAG3] != ELFMAG3 ) {
1350 munmap (data, file_size);
1353 sheader = (void*)((char*)data + header->e_shoff);
1354 shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
1355 strtab = (const char*)data + shstrtabh->sh_offset;
1356 for (i = 0; i < header->e_shnum; ++i) {
1357 //printf ("section header: %d\n", sheader->sh_type);
1358 if (sheader->sh_type == SHT_SYMTAB) {
1360 strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
1361 /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
1364 sheader = (void*)((char*)sheader + header->e_shentsize);
1366 if (!symtabh || !strtabh) {
1367 munmap (data, file_size);
1370 strtab = (const char*)data + strtabh->sh_offset;
1371 num_symbols = symtabh->sh_size / symtabh->sh_entsize;
1372 symbols = (void*)((char*)data + symtabh->sh_offset);
1373 dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
1374 munmap (data, file_size);
1379 #if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
1381 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
1383 MonoProfiler *prof = data;
1385 const char *filename;
1387 char *a = (void*)info->dlpi_addr;
1389 ElfW(Dyn) *dyn = NULL;
1390 ElfW(Sym) *symtab = NULL;
1391 ElfW(Word) *hash_table = NULL;
1392 ElfW(Ehdr) *header = NULL;
1393 const char* strtab = NULL;
1394 for (obj = prof->binary_objects; obj; obj = obj->next) {
1398 filename = info->dlpi_name;
1399 if (!info->dlpi_addr && !filename [0]) {
1400 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
1406 obj = calloc (sizeof (BinaryObject), 1);
1407 obj->addr = (void*)info->dlpi_addr;
1408 obj->name = pstrdup (filename);
1409 obj->next = prof->binary_objects;
1410 prof->binary_objects = obj;
1411 //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
1413 for (i = 0; i < info->dlpi_phnum; ++i) {
1414 //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);
1415 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
1416 header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
1417 if (header->e_ident [EI_MAG0] != ELFMAG0 ||
1418 header->e_ident [EI_MAG1] != ELFMAG1 ||
1419 header->e_ident [EI_MAG2] != ELFMAG2 ||
1420 header->e_ident [EI_MAG3] != ELFMAG3 ) {
1423 dump_ubin (filename, info->dlpi_addr + info->dlpi_phdr[i].p_vaddr, info->dlpi_phdr[i].p_offset, info->dlpi_phdr[i].p_memsz);
1424 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
1425 dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
1428 if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
1430 if (!info->dlpi_name || !info->dlpi_name[0])
1434 for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
1435 if (dyn [i].d_tag == DT_SYMTAB) {
1436 if (symtab && do_debug)
1437 printf ("multiple symtabs: %d\n", i);
1438 symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
1439 } else if (dyn [i].d_tag == DT_HASH) {
1440 hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
1441 } else if (dyn [i].d_tag == DT_STRTAB) {
1442 strtab = (const char*)(a + dyn [i].d_un.d_ptr);
1447 num_sym = hash_table [1];
1448 dump_elf_symbols (symtab, num_sym, strtab, (void*)info->dlpi_addr);
1453 load_binaries (MonoProfiler *prof)
1455 dl_iterate_phdr (elf_dl_callback, prof);
1460 load_binaries (MonoProfiler *prof)
1467 symbol_for (uintptr_t code)
1470 void *ip = (void*)code;
1472 if (dladdr (ip, &di)) {
1474 return di.dli_sname;
1477 names = backtrace_symbols (&ip, 1);
1479 const char* p = names [0];
1490 dump_unmanaged_coderefs (MonoProfiler *prof)
1493 const char* last_symbol;
1494 uintptr_t addr, page_end;
1496 if (load_binaries (prof))
1498 for (i = 0; i < size_code_pages; ++i) {
1500 if (!code_pages [i] || code_pages [i] & 1)
1503 addr = CPAGE_ADDR (code_pages [i]);
1504 page_end = addr + CPAGE_SIZE;
1505 code_pages [i] |= 1;
1506 /* we dump the symbols for the whole page */
1507 for (; addr < page_end; addr += 16) {
1508 sym = symbol_for (addr);
1509 if (sym && sym == last_symbol)
1514 dump_usym (sym, addr, 0); /* let's not guess the size */
1515 //printf ("found symbol at %p: %s\n", (void*)addr, sym);
1521 dump_sample_hits (MonoProfiler *prof, StatBuffer *sbuf, int recurse)
1524 LogBuffer *logbuffer;
1527 if (recurse && sbuf->next) {
1528 dump_sample_hits (prof, sbuf->next, 1);
1529 free_buffer (sbuf->next, sbuf->next->size);
1532 for (sample = sbuf->buf; sample < sbuf->data;) {
1534 int count = sample [0] & 0xffff;
1535 int type = sample [0] >> 16;
1536 if (sample + count + 3 > sbuf->data)
1538 logbuffer = ensure_logbuf (20 + count * 8);
1539 emit_byte (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT);
1540 emit_value (logbuffer, type);
1541 emit_uvalue (logbuffer, (prof->startup_time + sample [2]) * 10000);
1542 emit_value (logbuffer, count);
1543 for (i = 0; i < count; ++i) {
1544 emit_ptr (logbuffer, (void*)sample [i + 3]);
1545 add_code_pointer (sample [i + 3]);
1547 sample += count + 3;
1549 dump_unmanaged_coderefs (prof);
1553 #ifndef __NR_perf_event_open
1554 #define __NR_perf_event_open 241
1557 static int perf_fd = -1;
1558 static void *mmap_base;
1559 static struct perf_event_mmap_page *page_desc = NULL;
1560 static int num_pages = 64;
1561 static unsigned int mmap_mask;
1562 static unsigned int prev_pos = 0;
1565 struct perf_event_header h;
1575 perf_event_syscall (struct perf_event_attr *attr, pid_t pid, int cpu, int group_fd, unsigned long flags)
1577 attr->size = PERF_ATTR_SIZE_VER0;
1578 //printf ("perf attr size: %d\n", attr->size);
1579 #if defined(__x86_64__)
1580 return syscall(/*__NR_perf_event_open*/ 298, attr, pid, cpu, group_fd, flags);
1581 #elif defined(__i386__)
1582 return syscall(/*__NR_perf_event_open*/ 336, attr, pid, cpu, group_fd, flags);
1589 setup_perf_map (void)
1591 mmap_mask = num_pages * getpagesize () - 1;
1592 mmap_base = mmap (NULL, (num_pages + 1) * getpagesize (), PROT_READ|PROT_WRITE, MAP_SHARED, perf_fd, 0);
1593 if (mmap_base == MAP_FAILED) {
1595 printf ("failed mmap\n");
1598 page_desc = mmap_base;
1600 printf ("mmap version: %d\n", page_desc->version);
1605 dump_perf_hits (MonoProfiler *prof, void *buf, int size)
1607 LogBuffer *logbuffer;
1608 void *end = (char*)buf + size;
1610 int pid = getpid ();
1616 if (pid != s->pid) {
1618 printf ("event for different pid: %d\n", s->pid);
1619 buf = (char*)buf + s->h.size;
1622 /*ip = (void*)s->ip;
1623 printf ("sample: %d, size: %d, ip: %p (%s), timestamp: %llu, nframes: %llu\n",
1624 s->h.type, s->h.size, ip, symbol_for (ip), s->timestamp, s->nframes);*/
1625 logbuffer = ensure_logbuf (20 + s->nframes * 8);
1626 emit_byte (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT);
1627 emit_value (logbuffer, sample_type);
1628 emit_uvalue (logbuffer, s->timestamp - prof->startup_time);
1629 emit_value (logbuffer, 1); /* count */
1630 emit_ptr (logbuffer, (void*)(uintptr_t)s->ip);
1631 add_code_pointer (s->ip);
1632 buf = (char*)buf + s->h.size;
1636 printf ("dumped %d samples\n", samples);
1637 dump_unmanaged_coderefs (prof);
1640 /* read events from the ring buffer */
1642 read_perf_mmap (MonoProfiler* prof)
1645 unsigned char *data = (unsigned char*)mmap_base + getpagesize ();
1646 unsigned int head = page_desc->data_head;
1650 #if defined(__i386__)
1651 asm volatile("lock; addl $0,0(%%esp)":::"memory");
1652 #elif defined (__x86_64__)
1653 asm volatile("lfence":::"memory");
1660 printf ("lost mmap events: old: %d, head: %d\n", old, head);
1664 if ((old & mmap_mask) + size != (head & mmap_mask)) {
1665 buf = data + (old & mmap_mask);
1666 size = mmap_mask + 1 - (old & mmap_mask);
1668 /* size bytes at buf */
1670 printf ("found1 bytes of events: %d\n", size);
1671 dump_perf_hits (prof, buf, size);
1673 buf = data + (old & mmap_mask);
1675 /* size bytes at buf */
1677 printf ("found bytes of events: %d\n", size);
1678 dump_perf_hits (prof, buf, size);
1681 page_desc->data_tail = old;
1686 setup_perf_event (void)
1688 struct perf_event_attr attr;
1689 memset (&attr, 0, sizeof (attr));
1690 attr.type = PERF_TYPE_HARDWARE;
1691 switch (sample_type) {
1692 case SAMPLE_CYCLES: attr.config = PERF_COUNT_HW_CPU_CYCLES; break;
1693 case SAMPLE_INSTRUCTIONS: attr.config = PERF_COUNT_HW_INSTRUCTIONS; break;
1694 case SAMPLE_CACHE_MISSES: attr.config = PERF_COUNT_HW_CACHE_MISSES; break;
1695 case SAMPLE_CACHE_REFS: attr.config = PERF_COUNT_HW_CACHE_REFERENCES; break;
1696 case SAMPLE_BRANCHES: attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; break;
1697 case SAMPLE_BRANCH_MISSES: attr.config = PERF_COUNT_HW_BRANCH_MISSES; break;
1698 default: attr.config = PERF_COUNT_HW_CPU_CYCLES; break;
1700 attr.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_PERIOD | PERF_SAMPLE_TIME;
1701 // attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
1702 attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | PERF_FORMAT_TOTAL_TIME_RUNNING | PERF_FORMAT_ID;
1705 attr.sample_freq = sample_freq;
1707 perf_fd = perf_event_syscall (&attr, getpid (), -1, -1, 0);
1709 printf ("perf fd: %d, freq: %d, event: %llu\n", perf_fd, sample_freq, attr.config);
1711 if (perf_fd == -EPERM) {
1712 fprintf (stderr, "Perf syscall denied, do \"echo 1 > /proc/sys/kernel/perf_event_paranoid\" as root to enable.\n");
1715 perror ("open perf event");
1719 if (!setup_perf_map ()) {
1727 #endif /* USE_PERF_EVENTS */
1730 log_shutdown (MonoProfiler *prof)
1733 #ifndef DISABLE_HELPER_THREAD
1734 if (prof->command_port) {
1737 write (prof->pipes [1], &c, 1);
1738 pthread_join (prof->helper_thread, &res);
1743 read_perf_mmap (prof);
1745 dump_sample_hits (prof, prof->stat_buffers, 1);
1747 if (TLS_GET (tlsbuffer))
1748 dump_buffer (prof, TLS_GET (tlsbuffer));
1749 TLS_SET (tlsbuffer, NULL);
1751 #if defined (HAVE_SYS_ZLIB)
1753 gzclose (prof->gzfile);
1755 if (prof->pipe_output)
1756 pclose (prof->file);
1758 fclose (prof->file);
1763 new_filename (const char* filename)
1765 time_t t = time (NULL);
1766 int pid = process_id ();
1771 int count_dates = 0;
1775 for (p = filename; *p; p++) {
1786 if (!count_dates && !count_pids)
1787 return pstrdup (filename);
1788 snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
1790 snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
1791 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
1792 s_date = strlen (time_buf);
1793 s_pid = strlen (pid_buf);
1794 d = res = malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
1795 for (p = filename; *p; p++) {
1802 strcpy (d, time_buf);
1805 } else if (*p == 'p') {
1806 strcpy (d, pid_buf);
1809 } else if (*p == '%') {
1821 #ifndef DISABLE_HELPER_THREAD
1823 helper_thread (void* arg)
1825 MonoProfiler* prof = arg;
1829 MonoThread *thread = NULL;
1831 //fprintf (stderr, "Server listening\n");
1832 command_socket = -1;
1838 FD_SET (prof->server_socket, &rfds);
1839 max_fd = prof->server_socket;
1840 FD_SET (prof->pipes [0], &rfds);
1841 if (max_fd < prof->pipes [0])
1842 max_fd = prof->pipes [0];
1843 if (command_socket >= 0) {
1844 FD_SET (command_socket, &rfds);
1845 if (max_fd < command_socket)
1846 max_fd = command_socket;
1850 FD_SET (perf_fd, &rfds);
1851 if (max_fd < perf_fd)
1857 len = select (max_fd + 1, &rfds, NULL, NULL, &tv);
1858 if (FD_ISSET (prof->pipes [0], &rfds)) {
1860 int r = read (prof->pipes [0], &c, 1);
1861 if (r == 1 && c == 0) {
1862 StatBuffer *sbuf = prof->stat_buffers->next->next;
1863 prof->stat_buffers->next->next = NULL;
1865 fprintf (stderr, "stat buffer dump\n");
1866 dump_sample_hits (prof, sbuf, 1);
1867 free_buffer (sbuf, sbuf->size);
1870 /* time to shut down */
1872 mono_thread_detach (thread);
1874 fprintf (stderr, "helper shutdown\n");
1877 read_perf_mmap (prof);
1879 safe_dump (prof, ensure_logbuf (0));
1883 if (perf_fd >= 0 && FD_ISSET (perf_fd, &rfds)) {
1884 read_perf_mmap (prof);
1885 safe_dump (prof, ensure_logbuf (0));
1888 if (command_socket >= 0 && FD_ISSET (command_socket, &rfds)) {
1889 len = read (command_socket, buf, sizeof (buf) - 1);
1893 close (command_socket);
1894 command_socket = -1;
1898 if (strcmp (buf, "heapshot\n") == 0) {
1899 heapshot_requested = 1;
1900 //fprintf (stderr, "perform heapshot\n");
1901 if (runtime_inited && !thread) {
1902 thread = mono_thread_attach (mono_get_root_domain ());
1903 /*fprintf (stderr, "attached\n");*/
1906 process_requests (prof);
1907 mono_thread_detach (thread);
1913 if (!FD_ISSET (prof->server_socket, &rfds)) {
1916 command_socket = accept (prof->server_socket, NULL, NULL);
1917 if (command_socket < 0)
1919 //fprintf (stderr, "Accepted connection\n");
1925 start_helper_thread (MonoProfiler* prof)
1927 struct sockaddr_in server_address;
1930 if (pipe (prof->pipes) < 0) {
1931 fprintf (stderr, "Cannot create pipe\n");
1934 prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
1935 if (prof->server_socket < 0) {
1936 fprintf (stderr, "Cannot create server socket\n");
1939 memset (&server_address, 0, sizeof (server_address));
1940 server_address.sin_family = AF_INET;
1941 server_address.sin_addr.s_addr = INADDR_ANY;
1942 server_address.sin_port = htons (prof->command_port);
1943 if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) < 0) {
1944 fprintf (stderr, "Cannot bind server socket, port: %d: %s\n", prof->command_port, strerror (errno));
1945 close (prof->server_socket);
1948 if (listen (prof->server_socket, 1) < 0) {
1949 fprintf (stderr, "Cannot listen server socket\n");
1950 close (prof->server_socket);
1953 if (getsockname (prof->server_socket, (struct sockaddr *)&server_address, &slen) == 0) {
1954 prof->command_port = ntohs (server_address.sin_port);
1955 /*fprintf (stderr, "Assigned server port: %d\n", prof->command_port);*/
1958 r = pthread_create (&prof->helper_thread, NULL, helper_thread, prof);
1960 close (prof->server_socket);
1967 static MonoProfiler*
1968 create_profiler (const char *filename)
1972 int force_delete = 0;
1973 int need_helper_thread = 0;
1974 prof = calloc (1, sizeof (MonoProfiler));
1976 prof->command_port = command_port;
1977 if (filename && *filename == '-') {
1983 filename = "|mprof-report -";
1985 filename = "output.mlpd";
1986 nf = (char*)filename;
1988 nf = new_filename (filename);
1990 int s = strlen (nf) + 32;
1991 char *p = malloc (s);
1992 snprintf (p, s, "|mprof-report '--out=%s' -", nf);
1998 prof->file = popen (nf + 1, "w");
1999 prof->pipe_output = 1;
2004 if ((f = fopen (nf, "r"))) {
2006 fprintf (stderr, "The Mono profiler won't overwrite existing filename: %s.\n", nf);
2007 fprintf (stderr, "Profiling disabled: use a different name or -FILENAME to force overwrite.\n");
2011 prof->file = fopen (nf, "wb");
2014 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
2017 #if defined (HAVE_SYS_ZLIB)
2019 prof->gzfile = gzdopen (fileno (prof->file), "wb");
2022 if (sample_type && !do_mono_sample)
2023 need_helper_thread = setup_perf_event ();
2025 /* FIXME: warn if different freq or sample type */
2029 if (do_mono_sample) {
2030 prof->stat_buffers = create_stat_buffer ();
2031 need_helper_thread = 1;
2033 #ifndef DISABLE_HELPER_THREAD
2034 if (hs_mode_ondemand || need_helper_thread) {
2035 if (!start_helper_thread (prof))
2036 prof->command_port = 0;
2039 if (hs_mode_ondemand)
2040 fprintf (stderr, "Ondemand heapshot unavailable on this arch.\n");
2042 prof->startup_time = current_time ();
2050 printf ("Log profiler version %d.%d (format: %d)\n", LOG_VERSION_MAJOR, LOG_VERSION_MINOR, LOG_DATA_VERSION);
2051 printf ("Usage: mono --profile=log[:OPTION1[,OPTION2...]] program.exe\n");
2052 printf ("Options:\n");
2053 printf ("\thelp show this usage info\n");
2054 printf ("\t[no]alloc enable/disable recording allocation info\n");
2055 printf ("\t[no]calls enable/disable recording enter/leave method events\n");
2056 printf ("\theapshot[=MODE] record heap shot info (by default at each major collection)\n");
2057 printf ("\t MODE: every XXms milliseconds, every YYgc collections, ondemand\n");
2058 printf ("\tsample[=TYPE] use statistical sampling mode (by default cycles/1000)\n");
2059 printf ("\t TYPE: cycles,instr,cacherefs,cachemiss,branches,branchmiss\n");
2060 printf ("\t TYPE can be followed by /FREQUENCY\n");
2061 printf ("\ttime=fast use a faster (but more inaccurate) timer\n");
2062 printf ("\tmaxframes=NUM collect up to NUM stack frames\n");
2063 printf ("\tcalldepth=NUM ignore method events for call chain depth bigger than NUM\n");
2064 printf ("\toutput=FILENAME write the data to file FILENAME (-FILENAME to overwrite)\n");
2065 printf ("\toutput=|PROGRAM write the data to the stdin of PROGRAM\n");
2066 printf ("\t %%t is subtituted with date and time, %%p with the pid\n");
2067 printf ("\treport create a report instead of writing the raw data to a file\n");
2068 printf ("\tzip compress the output data\n");
2069 printf ("\tport=PORTNUM use PORTNUM for the listening command server\n");
2075 match_option (const char* p, const char *opt, char **rval)
2077 int len = strlen (opt);
2078 if (strncmp (p, opt, len) == 0) {
2080 if (p [len] == '=' && p [len + 1]) {
2081 const char *opt = p + len + 1;
2082 const char *end = strchr (opt, ',');
2090 val = malloc (l + 1);
2091 memcpy (val, opt, l);
2096 if (p [len] == 0 || p [len] == ',') {
2098 return p + len + (p [len] == ',');
2116 static const SampleMode sample_modes [] = {
2117 {"cycles", SAMPLE_CYCLES},
2118 {"instr", SAMPLE_INSTRUCTIONS},
2119 {"cachemiss", SAMPLE_CACHE_MISSES},
2120 {"cacherefs", SAMPLE_CACHE_REFS},
2121 {"branches", SAMPLE_BRANCHES},
2122 {"branchmiss", SAMPLE_BRANCH_MISSES},
2127 set_sample_mode (char* val, int allow_empty)
2130 char *maybe_freq = NULL;
2132 const SampleMode *smode = sample_modes;
2133 #ifndef USE_PERF_EVENTS
2136 if (allow_empty && !val) {
2137 sample_type = SAMPLE_CYCLES;
2141 if (strcmp (val, "mono") == 0) {
2143 sample_type = SAMPLE_CYCLES;
2147 for (smode = sample_modes; smode->name; smode++) {
2148 int l = strlen (smode->name);
2149 if (strncmp (val, smode->name, l) == 0) {
2150 sample_type = smode->sample_mode;
2151 maybe_freq = val + l;
2157 if (*maybe_freq == '/') {
2158 count = strtoul (maybe_freq + 1, &end, 10);
2159 if (maybe_freq + 1 == end)
2161 sample_freq = count;
2162 } else if (*maybe_freq != 0) {
2171 set_hsmode (char* val, int allow_empty)
2175 if (allow_empty && !val)
2177 if (strcmp (val, "ondemand") == 0) {
2178 hs_mode_ondemand = 1;
2182 count = strtoul (val, &end, 10);
2185 if (strcmp (end, "ms") == 0)
2187 else if (strcmp (end, "gc") == 0)
2195 * declaration to silence the compiler: this is the entry point that
2196 * mono will load from the shared library and call.
2199 mono_profiler_startup (const char *desc);
2202 mono_profiler_startup (const char *desc)
2205 char *filename = NULL;
2209 int calls_enabled = 0;
2210 int allocs_enabled = 0;
2211 int events = MONO_PROFILE_GC|MONO_PROFILE_ALLOCATIONS|
2212 MONO_PROFILE_GC_MOVES|MONO_PROFILE_CLASS_EVENTS|MONO_PROFILE_THREADS|
2213 MONO_PROFILE_ENTER_LEAVE|MONO_PROFILE_JIT_COMPILATION|MONO_PROFILE_EXCEPTIONS|
2214 MONO_PROFILE_MONITOR_EVENTS|MONO_PROFILE_MODULE_EVENTS|MONO_PROFILE_GC_ROOTS;
2217 if (strncmp (p, "log", 3))
2222 for (; *p; p = opt) {
2228 if ((opt = match_option (p, "help", NULL)) != p) {
2232 if ((opt = match_option (p, "calls", NULL)) != p) {
2236 if ((opt = match_option (p, "nocalls", NULL)) != p) {
2237 events &= ~MONO_PROFILE_ENTER_LEAVE;
2241 if ((opt = match_option (p, "alloc", NULL)) != p) {
2245 if ((opt = match_option (p, "noalloc", NULL)) != p) {
2246 events &= ~MONO_PROFILE_ALLOCATIONS;
2249 if ((opt = match_option (p, "time", &val)) != p) {
2250 if (strcmp (val, "fast") == 0)
2252 else if (strcmp (val, "null") == 0)
2259 if ((opt = match_option (p, "report", NULL)) != p) {
2263 if ((opt = match_option (p, "debug", NULL)) != p) {
2267 if ((opt = match_option (p, "heapshot", &val)) != p) {
2268 events &= ~MONO_PROFILE_ALLOCATIONS;
2269 events &= ~MONO_PROFILE_ENTER_LEAVE;
2272 set_hsmode (val, 1);
2275 if ((opt = match_option (p, "sample", &val)) != p) {
2276 events &= ~MONO_PROFILE_ALLOCATIONS;
2277 events &= ~MONO_PROFILE_ENTER_LEAVE;
2279 set_sample_mode (val, 1);
2282 if ((opt = match_option (p, "hsmode", &val)) != p) {
2283 fprintf (stderr, "The hsmode profiler option is obsolete, use heapshot=MODE.\n");
2284 set_hsmode (val, 0);
2287 if ((opt = match_option (p, "zip", NULL)) != p) {
2291 if ((opt = match_option (p, "output", &val)) != p) {
2295 if ((opt = match_option (p, "port", &val)) != p) {
2297 command_port = strtoul (val, &end, 10);
2301 if ((opt = match_option (p, "maxframes", &val)) != p) {
2303 num_frames = strtoul (val, &end, 10);
2304 if (num_frames > MAX_FRAMES)
2305 num_frames = MAX_FRAMES;
2307 notraces = num_frames == 0;
2310 if ((opt = match_option (p, "calldepth", &val)) != p) {
2312 max_call_depth = strtoul (val, &end, 10);
2321 if (calls_enabled) {
2322 events |= MONO_PROFILE_ENTER_LEAVE;
2326 events |= MONO_PROFILE_ALLOCATIONS;
2327 utils_init (fast_time);
2329 prof = create_profiler (filename);
2334 mono_profiler_install (prof, log_shutdown);
2335 mono_profiler_install_gc (gc_event, gc_resize);
2336 mono_profiler_install_allocation (gc_alloc);
2337 mono_profiler_install_gc_moves (gc_moves);
2338 mono_profiler_install_gc_roots (gc_handle, gc_roots);
2339 mono_profiler_install_class (NULL, class_loaded, NULL, NULL);
2340 mono_profiler_install_module (NULL, image_loaded, NULL, NULL);
2341 mono_profiler_install_thread (thread_start, thread_end);
2342 mono_profiler_install_thread_name (thread_name);
2343 mono_profiler_install_enter_leave (method_enter, method_leave);
2344 mono_profiler_install_jit_end (method_jitted);
2345 mono_profiler_install_exception (throw_exc, method_exc_leave, clause_exc);
2346 mono_profiler_install_monitor (monitor_event);
2347 mono_profiler_install_runtime_initialized (runtime_initialized);
2350 if (do_mono_sample && sample_type == SAMPLE_CYCLES) {
2351 events |= MONO_PROFILE_STATISTICAL;
2352 mono_profiler_install_statistical (mono_sample_hit);
2355 mono_profiler_set_events (events);
2357 TLS_INIT (tlsbuffer);