mono/profiler/log.c

   1 /*
   2  * mono-profiler-log.c: mono log profiler
   3  *
   4  * Authors:
   5  *   Paolo Molaro (lupus@ximian.com)
   6  *   Alex Rønne Petersen (alexrp@xamarin.com)
   7  *
   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.
  11  */
  12
  13 #include <config.h>
  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>
  33 #include "log.h"
  34
  35 #ifdef HAVE_DLFCN_H
  36 #include <dlfcn.h>
  37 #endif
  38 #include <fcntl.h>
  39 #ifdef HAVE_LINK_H
  40 #include <link.h>
  41 #endif
  42 #ifdef HAVE_UNISTD_H
  43 #include <unistd.h>
  44 #endif
  45 #if defined(__APPLE__)
  46 #include <mach/mach_time.h>
  47 #endif
  48 #include <netinet/in.h>
  49 #ifdef HAVE_SYS_MMAN_H
  50 #include <sys/mman.h>
  51 #endif
  52 #include <sys/socket.h>
  53 #if defined (HAVE_SYS_ZLIB)
  54 #include <zlib.h>
  55 #endif
  56
  57 #define BUFFER_SIZE (4096 * 16)
  58
  59 /* Worst-case size in bytes of a 64-bit value encoded with LEB128. */
  60 #define LEB128_SIZE 10
  61
  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.
  64 #define BYTE_SIZE 1
  65
  66 /* Size in bytes of the event prefix (ID + time). */
  67 #define EVENT_SIZE (BYTE_SIZE + LEB128_SIZE)
  68
  69 static volatile gint32 runtime_inited;
  70 static volatile gint32 in_shutdown;
  71
  72 static ProfilerConfig config;
  73 static int nocalls = 0;
  74 static int notraces = 0;
  75 static int use_zip = 0;
  76 static int do_report = 0;
  77 static int do_heap_shot = 0;
  78 static int max_call_depth = 0;
  79 static int command_port = 0;
  80 static int heapshot_requested = 0;
  81 static int do_mono_sample = 0;
  82 static int do_debug = 0;
  83 static int do_coverage = 0;
  84 static gboolean no_counters = FALSE;
  85 static gboolean only_coverage = FALSE;
  86 static gboolean debug_coverage = FALSE;
  87 static int max_allocated_sample_hits;
  88
  89 #define ENABLED(EVT) (config.effective_mask & (EVT))
  90
  91 // Statistics for internal profiler data structures.
  92 static gint32 sample_allocations_ctr,
  93               buffer_allocations_ctr;
  94
  95 // Statistics for profiler events.
  96 static gint32 sync_points_ctr,
  97               heap_objects_ctr,
  98               heap_starts_ctr,
  99               heap_ends_ctr,
 100               heap_roots_ctr,
 101               gc_events_ctr,
 102               gc_resizes_ctr,
 103               gc_allocs_ctr,
 104               gc_moves_ctr,
 105               gc_handle_creations_ctr,
 106               gc_handle_deletions_ctr,
 107               finalize_begins_ctr,
 108               finalize_ends_ctr,
 109               finalize_object_begins_ctr,
 110               finalize_object_ends_ctr,
 111               image_loads_ctr,
 112               image_unloads_ctr,
 113               assembly_loads_ctr,
 114               assembly_unloads_ctr,
 115               class_loads_ctr,
 116               class_unloads_ctr,
 117               method_entries_ctr,
 118               method_exits_ctr,
 119               method_exception_exits_ctr,
 120               method_jits_ctr,
 121               code_buffers_ctr,
 122               exception_throws_ctr,
 123               exception_clauses_ctr,
 124               monitor_events_ctr,
 125               thread_starts_ctr,
 126               thread_ends_ctr,
 127               thread_names_ctr,
 128               domain_loads_ctr,
 129               domain_unloads_ctr,
 130               domain_names_ctr,
 131               context_loads_ctr,
 132               context_unloads_ctr,
 133               sample_ubins_ctr,
 134               sample_usyms_ctr,
 135               sample_hits_ctr,
 136               counter_descriptors_ctr,
 137               counter_samples_ctr,
 138               perfcounter_descriptors_ctr,
 139               perfcounter_samples_ctr,
 140               coverage_methods_ctr,
 141               coverage_statements_ctr,
 142               coverage_classes_ctr,
 143               coverage_assemblies_ctr;
 144
 145 static MonoLinkedListSet profiler_thread_list;
 146
 147 /*
 148  * file format:
 149  * [header] [buffer]*
 150  *
 151  * The file is composed by a header followed by 0 or more buffers.
 152  * Each buffer contains events that happened on a thread: for a given thread
 153  * buffers that appear later in the file are guaranteed to contain events
 154  * that happened later in time. Buffers from separate threads could be interleaved,
 155  * though.
 156  * Buffers are not required to be aligned.
 157  *
 158  * header format:
 159  * [id: 4 bytes] constant value: LOG_HEADER_ID
 160  * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
 161  * [format: 1 byte] version of the data format for the rest of the file
 162  * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
 163  * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
 164  * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
 165  * [flags: 4 bytes] file format flags, should be 0 for now
 166  * [pid: 4 bytes] pid of the profiled process
 167  * [port: 2 bytes] tcp port for server if != 0
 168  * [args size: 4 bytes] size of args
 169  * [args: string] arguments passed to the profiler
 170  * [arch size: 4 bytes] size of arch
 171  * [arch: string] architecture the profiler is running on
 172  * [os size: 4 bytes] size of os
 173  * [os: string] operating system the profiler is running on
 174  *
 175  * The multiple byte integers are in little-endian format.
 176  *
 177  * buffer format:
 178  * [buffer header] [event]*
 179  * Buffers have a fixed-size header followed by 0 or more bytes of event data.
 180  * Timing information and other values in the event data are usually stored
 181  * as uleb128 or sleb128 integers. To save space, as noted for each item below,
 182  * some data is represented as a difference between the actual value and
 183  * either the last value of the same type (like for timing information) or
 184  * as the difference from a value stored in a buffer header.
 185  *
 186  * For timing information the data is stored as uleb128, since timing
 187  * increases in a monotonic way in each thread: the value is the number of
 188  * nanoseconds to add to the last seen timing data in a buffer. The first value
 189  * in a buffer will be calculated from the time_base field in the buffer head.
 190  *
 191  * Object or heap sizes are stored as uleb128.
 192  * Pointer differences are stored as sleb128, instead.
 193  *
 194  * If an unexpected value is found, the rest of the buffer should be ignored,
 195  * as generally the later values need the former to be interpreted correctly.
 196  *
 197  * buffer header format:
 198  * [bufid: 4 bytes] constant value: BUF_ID
 199  * [len: 4 bytes] size of the data following the buffer header
 200  * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
 201  * [ptr_base: 8 bytes] base value for pointers
 202  * [obj_base: 8 bytes] base value for object addresses
 203  * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
 204  * [method_base: 8 bytes] base value for MonoMethod pointers
 205  *
 206  * event format:
 207  * [extended info: upper 4 bits] [type: lower 4 bits]
 208  * [time diff: uleb128] nanoseconds since last timing
 209  * [data]*
 210  * The data that follows depends on type and the extended info.
 211  * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
 212  * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
 213  * The extended info bits are interpreted based on type, see
 214  * each individual event description below.
 215  * strings are represented as a 0-terminated utf8 sequence.
 216  *
 217  * backtrace format:
 218  * [num: uleb128] number of frames following
 219  * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
 220  * pointer or the buffer method_base
 221  *
 222  * type alloc format:
 223  * type: TYPE_ALLOC
 224  * exinfo: zero or TYPE_ALLOC_BT
 225  * [ptr: sleb128] class as a byte difference from ptr_base
 226  * [obj: sleb128] object address as a byte difference from obj_base
 227  * [size: uleb128] size of the object in the heap
 228  * If exinfo == TYPE_ALLOC_BT, a backtrace follows.
 229  *
 230  * type GC format:
 231  * type: TYPE_GC
 232  * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
 233  * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
 234  * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
 235  * if exinfo == TYPE_GC_RESIZE
 236  *      [heap_size: uleb128] new heap size
 237  * if exinfo == TYPE_GC_EVENT
 238  *      [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
 239  *      [generation: byte] GC generation event refers to
 240  * if exinfo == TYPE_GC_MOVE
 241  *      [num_objects: uleb128] number of object moves that follow
 242  *      [objaddr: sleb128]+ num_objects object pointer differences from obj_base
 243  *      num is always an even number: the even items are the old
 244  *      addresses, the odd numbers are the respective new object addresses
 245  * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
 246  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 247  *      upper bits reserved as flags
 248  *      [handle: uleb128] GC handle value
 249  *      [objaddr: sleb128] object pointer differences from obj_base
 250  *      If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
 251  * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
 252  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 253  *      upper bits reserved as flags
 254  *      [handle: uleb128] GC handle value
 255  *      If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
 256  * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
 257  *      [object: sleb128] the object as a difference from obj_base
 258  *
 259  * type metadata format:
 260  * type: TYPE_METADATA
 261  * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN,
 262  * doesn't occur for TYPE_CLASS)
 263  * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
 264  * TYPE_THREAD, TYPE_CONTEXT
 265  * [pointer: sleb128] pointer of the metadata type depending on mtype
 266  * if mtype == TYPE_CLASS
 267  *      [image: sleb128] MonoImage* as a pointer difference from ptr_base
 268  *      [name: string] full class name
 269  * if mtype == TYPE_IMAGE
 270  *      [name: string] image file name
 271  * if mtype == TYPE_ASSEMBLY
 272  *      [image: sleb128] MonoImage* as a pointer difference from ptr_base
 273  *      [name: string] assembly name
 274  * if mtype == TYPE_DOMAIN && exinfo == 0
 275  *      [name: string] domain friendly name
 276  * if mtype == TYPE_CONTEXT
 277  *      [domain: sleb128] domain id as pointer
 278  * if mtype == TYPE_THREAD && exinfo == 0
 279  *      [name: string] thread name
 280  *
 281  * type method format:
 282  * type: TYPE_METHOD
 283  * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
 284  * [method: sleb128] MonoMethod* as a pointer difference from the last such
 285  * pointer or the buffer method_base
 286  * if exinfo == TYPE_JIT
 287  *      [code address: sleb128] pointer to the native code as a diff from ptr_base
 288  *      [code size: uleb128] size of the generated code
 289  *      [name: string] full method name
 290  *
 291  * type exception format:
 292  * type: TYPE_EXCEPTION
 293  * exinfo: zero, TYPE_CLAUSE, or TYPE_THROW_BT
 294  * if exinfo == TYPE_CLAUSE
 295  *      [clause type: byte] MonoExceptionEnum enum value
 296  *      [clause index: uleb128] index of the current clause
 297  *      [method: sleb128] MonoMethod* as a pointer difference from the last such
 298  *      pointer or the buffer method_base
 299  *      [object: sleb128] the exception object as a difference from obj_base
 300  * else
 301  *      [object: sleb128] the exception object as a difference from obj_base
 302  *      If exinfo == TYPE_THROW_BT, a backtrace follows.
 303  *
 304  * type runtime format:
 305  * type: TYPE_RUNTIME
 306  * exinfo: one of: TYPE_JITHELPER
 307  * if exinfo == TYPE_JITHELPER
 308  *      [type: byte] MonoProfilerCodeBufferType enum value
 309  *      [buffer address: sleb128] pointer to the native code as a diff from ptr_base
 310  *      [buffer size: uleb128] size of the generated code
 311  *      if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
 312  *              [name: string] buffer description name
 313  *
 314  * type monitor format:
 315  * type: TYPE_MONITOR
 316  * exinfo: zero or TYPE_MONITOR_BT
 317  * [type: byte] MONO_PROFILER_MONITOR_{CONTENTION,FAIL,DONE}
 318  * [object: sleb128] the lock object as a difference from obj_base
 319  * If exinfo == TYPE_MONITOR_BT, a backtrace follows.
 320  *
 321  * type heap format
 322  * type: TYPE_HEAP
 323  * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
 324  * if exinfo == TYPE_HEAP_OBJECT
 325  *      [object: sleb128] the object as a difference from obj_base
 326  *      [class: sleb128] the object MonoClass* as a difference from ptr_base
 327  *      [size: uleb128] size of the object on the heap
 328  *      [num_refs: uleb128] number of object references
 329  *      each referenced objref is preceded by a uleb128 encoded offset: the
 330  *      first offset is from the object address and each next offset is relative
 331  *      to the previous one
 332  *      [objrefs: sleb128]+ object referenced as a difference from obj_base
 333  *      The same object can appear multiple times, but only the first time
 334  *      with size != 0: in the other cases this data will only be used to
 335  *      provide additional referenced objects.
 336  * if exinfo == TYPE_HEAP_ROOT
 337  *      [num_roots: uleb128] number of root references
 338  *      [num_gc: uleb128] number of major gcs
 339  *      [object: sleb128] the object as a difference from obj_base
 340  *      [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
 341  *      [extra_info: uleb128] the extra_info value
 342  *      object, root_type and extra_info are repeated num_roots times
 343  *
 344  * type sample format
 345  * type: TYPE_SAMPLE
 346  * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
 347  * if exinfo == TYPE_SAMPLE_HIT
 348  *      [thread: sleb128] thread id as difference from ptr_base
 349  *      [count: uleb128] number of following instruction addresses
 350  *      [ip: sleb128]* instruction pointer as difference from ptr_base
 351  *      [mbt_count: uleb128] number of managed backtrace frames
 352  *      [method: sleb128]* MonoMethod* as a pointer difference from the last such
 353  *      pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
 354  * if exinfo == TYPE_SAMPLE_USYM
 355  *      [address: sleb128] symbol address as a difference from ptr_base
 356  *      [size: uleb128] symbol size (may be 0 if unknown)
 357  *      [name: string] symbol name
 358  * if exinfo == TYPE_SAMPLE_UBIN
 359  *      [address: sleb128] address where binary has been loaded as a difference from ptr_base
 360  *      [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
 361  *      [size: uleb128] memory size
 362  *      [name: string] binary name
 363  * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
 364  *      [len: uleb128] number of counters
 365  *      for i = 0 to len
 366  *              [section: uleb128] section of counter
 367  *              if section == MONO_COUNTER_PERFCOUNTERS:
 368  *                      [section_name: string] section name of counter
 369  *              [name: string] name of counter
 370  *              [type: byte] type of counter
 371  *              [unit: byte] unit of counter
 372  *              [variance: byte] variance of counter
 373  *              [index: uleb128] unique index of counter
 374  * if exinfo == TYPE_SAMPLE_COUNTERS
 375  *      while true:
 376  *              [index: uleb128] unique index of counter
 377  *              if index == 0:
 378  *                      break
 379  *              [type: byte] type of counter value
 380  *              if type == string:
 381  *                      if value == null:
 382  *                              [0: byte] 0 -> value is null
 383  *                      else:
 384  *                              [1: byte] 1 -> value is not null
 385  *                              [value: string] counter value
 386  *              else:
 387  *                      [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
 388  *
 389  * type coverage format
 390  * type: TYPE_COVERAGE
 391  * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
 392  * if exinfo == TYPE_COVERAGE_METHOD
 393  *  [assembly: string] name of assembly
 394  *  [class: string] name of the class
 395  *  [name: string] name of the method
 396  *  [signature: string] the signature of the method
 397  *  [filename: string] the file path of the file that contains this method
 398  *  [token: uleb128] the method token
 399  *  [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
 400  *  [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
 401  * if exinfo == TYPE_COVERAGE_STATEMENTS
 402  *  [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
 403  *  [offset: uleb128] the il offset relative to the previous offset
 404  *  [counter: uleb128] the counter for this instruction
 405  *  [line: uleb128] the line of filename containing this instruction
 406  *  [column: uleb128] the column containing this instruction
 407  * if exinfo == TYPE_COVERAGE_ASSEMBLY
 408  *  [name: string] assembly name
 409  *  [guid: string] assembly GUID
 410  *  [filename: string] assembly filename
 411  *  [number_of_methods: uleb128] the number of methods in this assembly
 412  *  [fully_covered: uleb128] the number of fully covered methods
 413  *  [partially_covered: uleb128] the number of partially covered methods
 414  *    currently partially_covered will always be 0, and fully_covered is the
 415  *    number of methods that are fully and partially covered.
 416  * if exinfo == TYPE_COVERAGE_CLASS
 417  *  [name: string] assembly name
 418  *  [class: string] class name
 419  *  [number_of_methods: uleb128] the number of methods in this class
 420  *  [fully_covered: uleb128] the number of fully covered methods
 421  *  [partially_covered: uleb128] the number of partially covered methods
 422  *    currently partially_covered will always be 0, and fully_covered is the
 423  *    number of methods that are fully and partially covered.
 424  *
 425  * type meta format:
 426  * type: TYPE_META
 427  * exinfo: one of: TYPE_SYNC_POINT
 428  * if exinfo == TYPE_SYNC_POINT
 429  *      [type: byte] MonoProfilerSyncPointType enum value
 430  */
 431
 432 // Pending data to be written to the log, for a single thread.
 433 // Threads periodically flush their own LogBuffers by calling safe_send
 434 typedef struct _LogBuffer LogBuffer;
 435 struct _LogBuffer {
 436         // Next (older) LogBuffer in processing queue
 437         LogBuffer *next;
 438
 439         uint64_t time_base;
 440         uint64_t last_time;
 441         uintptr_t ptr_base;
 442         uintptr_t method_base;
 443         uintptr_t last_method;
 444         uintptr_t obj_base;
 445         uintptr_t thread_id;
 446
 447         // Bytes allocated for this LogBuffer
 448         int size;
 449
 450         // Start of currently unused space in buffer
 451         unsigned char* cursor;
 452
 453         // Pointer to start-of-structure-plus-size (for convenience)
 454         unsigned char* buf_end;
 455
 456         // Start of data in buffer. Contents follow "buffer format" described above.
 457         unsigned char buf [1];
 458 };
 459
 460 typedef struct {
 461         MonoLinkedListSetNode node;
 462
 463         // Convenience pointer to the profiler structure.
 464         MonoProfiler *profiler;
 465
 466         // Was this thread added to the LLS?
 467         gboolean attached;
 468
 469         // The current log buffer for this thread.
 470         LogBuffer *buffer;
 471
 472         // Methods referenced by events in `buffer`, see `MethodInfo`.
 473         GPtrArray *methods;
 474
 475         // Current call depth for enter/leave events.
 476         int call_depth;
 477
 478         // Indicates whether this thread is currently writing to its `buffer`.
 479         gboolean busy;
 480
 481         // Has this thread written a thread end event to `buffer`?
 482         gboolean ended;
 483
 484         // Stored in `buffer_lock_state` to take the exclusive lock.
 485         int small_id;
 486 } MonoProfilerThread;
 487
 488 // Do not use these TLS macros directly unless you know what you're doing.
 489
 490 #ifdef HOST_WIN32
 491
 492 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
 493 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
 494 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
 495 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
 496
 497 static DWORD profiler_tls;
 498
 499 #elif HAVE_KW_THREAD
 500
 501 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
 502 #define PROF_TLS_GET() (profiler_tls)
 503 #define PROF_TLS_INIT()
 504 #define PROF_TLS_FREE()
 505
 506 static __thread MonoProfilerThread *profiler_tls;
 507
 508 #else
 509
 510 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
 511 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
 512 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
 513 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
 514
 515 static pthread_key_t profiler_tls;
 516
 517 #endif
 518
 519 static uintptr_t
 520 thread_id (void)
 521 {
 522         return (uintptr_t) mono_native_thread_id_get ();
 523 }
 524
 525 static uintptr_t
 526 process_id (void)
 527 {
 528 #ifdef HOST_WIN32
 529         return (uintptr_t) GetCurrentProcessId ();
 530 #else
 531         return (uintptr_t) getpid ();
 532 #endif
 533 }
 534
 535 #ifdef __APPLE__
 536 static mach_timebase_info_data_t timebase_info;
 537 #elif defined (HOST_WIN32)
 538 static LARGE_INTEGER pcounter_freq;
 539 #endif
 540
 541 #define TICKS_PER_SEC 1000000000LL
 542
 543 static uint64_t
 544 current_time (void)
 545 {
 546 #ifdef __APPLE__
 547         uint64_t time = mach_absolute_time ();
 548
 549         time *= timebase_info.numer;
 550         time /= timebase_info.denom;
 551
 552         return time;
 553 #elif defined (HOST_WIN32)
 554         LARGE_INTEGER value;
 555
 556         QueryPerformanceCounter (&value);
 557
 558         return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
 559 #elif defined (CLOCK_MONOTONIC)
 560         struct timespec tspec;
 561
 562         clock_gettime (CLOCK_MONOTONIC, &tspec);
 563
 564         return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
 565 #else
 566         struct timeval tv;
 567
 568         gettimeofday (&tv, NULL);
 569
 570         return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
 571 #endif
 572 }
 573
 574 static int timer_overhead;
 575
 576 static void
 577 init_time (void)
 578 {
 579 #ifdef __APPLE__
 580         mach_timebase_info (&timebase_info);
 581 #elif defined (HOST_WIN32)
 582         QueryPerformanceFrequency (&pcounter_freq);
 583 #endif
 584
 585         uint64_t time_start = current_time ();
 586
 587         for (int i = 0; i < 256; ++i)
 588                 current_time ();
 589
 590         uint64_t time_end = current_time ();
 591
 592         timer_overhead = (time_end - time_start) / 256;
 593 }
 594
 595 /*
 596  * These macros should be used when writing an event to a log buffer. They
 597  * take care of a bunch of stuff that can be repetitive and error-prone, such
 598  * as attaching the current thread, acquiring/releasing the buffer lock,
 599  * incrementing the event counter, expanding the log buffer, etc. They also
 600  * create a scope so that it's harder to leak the LogBuffer pointer, which can
 601  * be problematic as the pointer is unstable when the buffer lock isn't
 602  * acquired.
 603  *
 604  * If the calling thread is already attached, these macros will not alter its
 605  * attach mode (i.e. whether it's added to the LLS). If the thread is not
 606  * attached, init_thread () will be called with add_to_lls = TRUE.
 607  */
 608
 609 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
 610         do { \
 611                 MonoProfilerThread *thread__ = get_thread (); \
 612                 if (thread__->attached) \
 613                         buffer_lock (); \
 614                 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
 615                 thread__->busy = TRUE; \
 616                 InterlockedIncrement ((COUNTER)); \
 617                 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
 618
 619 #define EXIT_LOG_EXPLICIT(SEND) \
 620                 thread__->busy = FALSE; \
 621                 if ((SEND)) \
 622                         send_log_unsafe (TRUE); \
 623                 if (thread__->attached) \
 624                         buffer_unlock (); \
 625         } while (0)
 626
 627 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
 628 #define DO_SEND TRUE
 629 #define NO_SEND FALSE
 630
 631 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
 632
 633 typedef struct _BinaryObject BinaryObject;
 634 struct _BinaryObject {
 635         BinaryObject *next;
 636         void *addr;
 637         char *name;
 638 };
 639
 640 static MonoProfiler *log_profiler;
 641
 642 struct _MonoProfiler {
 643         FILE* file;
 644 #if defined (HAVE_SYS_ZLIB)
 645         gzFile gzfile;
 646 #endif
 647         char *args;
 648         uint64_t startup_time;
 649         int pipe_output;
 650         int command_port;
 651         int server_socket;
 652         int pipes [2];
 653         MonoNativeThreadId helper_thread;
 654         MonoNativeThreadId writer_thread;
 655         MonoNativeThreadId dumper_thread;
 656         volatile gint32 run_writer_thread;
 657         MonoLockFreeAllocSizeClass writer_entry_size_class;
 658         MonoLockFreeAllocator writer_entry_allocator;
 659         MonoLockFreeQueue writer_queue;
 660         MonoSemType writer_queue_sem;
 661         MonoConcurrentHashTable *method_table;
 662         mono_mutex_t method_table_mutex;
 663         volatile gint32 run_dumper_thread;
 664         MonoLockFreeQueue dumper_queue;
 665         MonoSemType dumper_queue_sem;
 666         MonoLockFreeAllocSizeClass sample_size_class;
 667         MonoLockFreeAllocator sample_allocator;
 668         MonoLockFreeQueue sample_reuse_queue;
 669         BinaryObject *binary_objects;
 670         GPtrArray *coverage_filters;
 671 };
 672
 673 typedef struct {
 674         MonoLockFreeQueueNode node;
 675         GPtrArray *methods;
 676         LogBuffer *buffer;
 677 } WriterQueueEntry;
 678
 679 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
 680
 681 typedef struct {
 682         MonoMethod *method;
 683         MonoJitInfo *ji;
 684         uint64_t time;
 685 } MethodInfo;
 686
 687 static char*
 688 pstrdup (const char *s)
 689 {
 690         int len = strlen (s) + 1;
 691         char *p = (char *) g_malloc (len);
 692         memcpy (p, s, len);
 693         return p;
 694 }
 695
 696 static void *
 697 alloc_buffer (int size)
 698 {
 699         return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
 700 }
 701
 702 static void
 703 free_buffer (void *buf, int size)
 704 {
 705         mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
 706 }
 707
 708 static LogBuffer*
 709 create_buffer (uintptr_t tid, int bytes)
 710 {
 711         LogBuffer* buf = (LogBuffer *) alloc_buffer (MAX (BUFFER_SIZE, bytes));
 712
 713         InterlockedIncrement (&buffer_allocations_ctr);
 714
 715         buf->size = BUFFER_SIZE;
 716         buf->time_base = current_time ();
 717         buf->last_time = buf->time_base;
 718         buf->buf_end = (unsigned char *) buf + buf->size;
 719         buf->cursor = buf->buf;
 720         buf->thread_id = tid;
 721
 722         return buf;
 723 }
 724
 725 /*
 726  * Must be called with the reader lock held if thread is the current thread, or
 727  * the exclusive lock if thread is a different thread. However, if thread is
 728  * the current thread, and init_thread () was called with add_to_lls = FALSE,
 729  * then no locking is necessary.
 730  */
 731 static void
 732 init_buffer_state (MonoProfilerThread *thread)
 733 {
 734         thread->buffer = create_buffer (thread->node.key, 0);
 735         thread->methods = NULL;
 736 }
 737
 738 static void
 739 clear_hazard_pointers (MonoThreadHazardPointers *hp)
 740 {
 741         mono_hazard_pointer_clear (hp, 0);
 742         mono_hazard_pointer_clear (hp, 1);
 743         mono_hazard_pointer_clear (hp, 2);
 744 }
 745
 746 static MonoProfilerThread *
 747 init_thread (MonoProfiler *prof, gboolean add_to_lls)
 748 {
 749         MonoProfilerThread *thread = PROF_TLS_GET ();
 750
 751         /*
 752          * Sometimes we may try to initialize a thread twice. One example is the
 753          * main thread: We initialize it when setting up the profiler, but we will
 754          * also get a thread_start () callback for it. Another example is when
 755          * attaching new threads to the runtime: We may get a gc_alloc () callback
 756          * for that thread's thread object (where we initialize it), soon followed
 757          * by a thread_start () callback.
 758          *
 759          * These cases are harmless anyhow. Just return if we've already done the
 760          * initialization work.
 761          */
 762         if (thread)
 763                 return thread;
 764
 765         thread = g_malloc (sizeof (MonoProfilerThread));
 766         thread->node.key = thread_id ();
 767         thread->profiler = prof;
 768         thread->attached = add_to_lls;
 769         thread->call_depth = 0;
 770         thread->busy = 0;
 771         thread->ended = FALSE;
 772
 773         init_buffer_state (thread);
 774
 775         thread->small_id = mono_thread_info_register_small_id ();
 776
 777         /*
 778          * Some internal profiler threads don't need to be cleaned up
 779          * by the main thread on shutdown.
 780          */
 781         if (add_to_lls) {
 782                 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
 783                 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
 784                 clear_hazard_pointers (hp);
 785         }
 786
 787         PROF_TLS_SET (thread);
 788
 789         return thread;
 790 }
 791
 792 // Only valid if init_thread () was called with add_to_lls = FALSE.
 793 static void
 794 deinit_thread (MonoProfilerThread *thread)
 795 {
 796         g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
 797
 798         g_free (thread);
 799         PROF_TLS_SET (NULL);
 800 }
 801
 802 static MonoProfilerThread *
 803 get_thread (void)
 804 {
 805         return init_thread (log_profiler, TRUE);
 806 }
 807
 808 // Only valid if init_thread () was called with add_to_lls = FALSE.
 809 static LogBuffer *
 810 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
 811 {
 812         LogBuffer *old = thread->buffer;
 813
 814         if (old->cursor + bytes < old->buf_end)
 815                 return old;
 816
 817         LogBuffer *new_ = create_buffer (thread->node.key, bytes);
 818         new_->next = old;
 819         thread->buffer = new_;
 820
 821         return new_;
 822 }
 823
 824 /*
 825  * This is a reader/writer spin lock of sorts used to protect log buffers.
 826  * When a thread modifies its own log buffer, it increments the reader
 827  * count. When a thread wants to access log buffers of other threads, it
 828  * takes the exclusive lock.
 829  *
 830  * `buffer_lock_state` holds the reader count in its lower 16 bits, and
 831  * the small ID of the thread currently holding the exclusive (writer)
 832  * lock in its upper 16 bits. Both can be zero. It's important that the
 833  * whole lock state is a single word that can be read/written atomically
 834  * to avoid race conditions where there could end up being readers while
 835  * the writer lock is held.
 836  *
 837  * The lock is writer-biased. When a thread wants to take the exclusive
 838  * lock, it increments `buffer_lock_exclusive_intent` which will make new
 839  * readers spin until it's back to zero, then takes the exclusive lock
 840  * once the reader count has reached zero. After releasing the exclusive
 841  * lock, it decrements `buffer_lock_exclusive_intent`, which, when it
 842  * reaches zero again, allows readers to increment the reader count.
 843  *
 844  * The writer bias is necessary because we take the exclusive lock in
 845  * `gc_event ()` during STW. If the writer bias was not there, and a
 846  * program had a large number of threads, STW-induced pauses could be
 847  * significantly longer than they have to be. Also, we emit periodic
 848  * sync points from the helper thread, which requires taking the
 849  * exclusive lock, and we need those to arrive with a reasonably
 850  * consistent frequency so that readers don't have to queue up too many
 851  * events between sync points.
 852  *
 853  * The lock does not support recursion.
 854  */
 855 static volatile gint32 buffer_lock_state;
 856 static volatile gint32 buffer_lock_exclusive_intent;
 857
 858 static void
 859 buffer_lock (void)
 860 {
 861         /*
 862          * If the thread holding the exclusive lock tries to modify the
 863          * reader count, just make it a no-op. This way, we also avoid
 864          * invoking the GC safe point macros below, which could break if
 865          * done from a thread that is currently the initiator of STW.
 866          *
 867          * In other words, we rely on the fact that the GC thread takes
 868          * the exclusive lock in the gc_event () callback when the world
 869          * is about to stop.
 870          */
 871         if (InterlockedRead (&buffer_lock_state) != get_thread ()->small_id << 16) {
 872                 MONO_ENTER_GC_SAFE;
 873
 874                 gint32 old, new_;
 875
 876                 do {
 877                 restart:
 878                         // Hold off if a thread wants to take the exclusive lock.
 879                         while (InterlockedRead (&buffer_lock_exclusive_intent))
 880                                 mono_thread_info_yield ();
 881
 882                         old = InterlockedRead (&buffer_lock_state);
 883
 884                         // Is a thread holding the exclusive lock?
 885                         if (old >> 16) {
 886                                 mono_thread_info_yield ();
 887                                 goto restart;
 888                         }
 889
 890                         new_ = old + 1;
 891                 } while (InterlockedCompareExchange (&buffer_lock_state, new_, old) != old);
 892
 893                 MONO_EXIT_GC_SAFE;
 894         }
 895
 896         mono_memory_barrier ();
 897 }
 898
 899 static void
 900 buffer_unlock (void)
 901 {
 902         mono_memory_barrier ();
 903
 904         gint32 state = InterlockedRead (&buffer_lock_state);
 905
 906         // See the comment in buffer_lock ().
 907         if (state == PROF_TLS_GET ()->small_id << 16)
 908                 return;
 909
 910         g_assert (state && "Why are we decrementing a zero reader count?");
 911         g_assert (!(state >> 16) && "Why is the exclusive lock held?");
 912
 913         InterlockedDecrement (&buffer_lock_state);
 914 }
 915
 916 static void
 917 buffer_lock_excl (void)
 918 {
 919         gint32 new_ = get_thread ()->small_id << 16;
 920
 921         g_assert (InterlockedRead (&buffer_lock_state) != new_ && "Why are we taking the exclusive lock twice?");
 922
 923         InterlockedIncrement (&buffer_lock_exclusive_intent);
 924
 925         MONO_ENTER_GC_SAFE;
 926
 927         while (InterlockedCompareExchange (&buffer_lock_state, new_, 0))
 928                 mono_thread_info_yield ();
 929
 930         MONO_EXIT_GC_SAFE;
 931
 932         mono_memory_barrier ();
 933 }
 934
 935 static void
 936 buffer_unlock_excl (void)
 937 {
 938         mono_memory_barrier ();
 939
 940         gint32 state = InterlockedRead (&buffer_lock_state);
 941         gint32 excl = state >> 16;
 942
 943         g_assert (excl && "Why is the exclusive lock not held?");
 944         g_assert (excl == PROF_TLS_GET ()->small_id && "Why does another thread hold the exclusive lock?");
 945         g_assert (!(state & 0xFFFF) && "Why are there readers when the exclusive lock is held?");
 946
 947         InterlockedWrite (&buffer_lock_state, 0);
 948         InterlockedDecrement (&buffer_lock_exclusive_intent);
 949 }
 950
 951 static void
 952 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
 953 {
 954         uint8_t *p = buf;
 955
 956         do {
 957                 uint8_t b = value & 0x7f;
 958                 value >>= 7;
 959
 960                 if (value != 0) /* more bytes to come */
 961                         b |= 0x80;
 962
 963                 *p ++ = b;
 964         } while (value);
 965
 966         *endbuf = p;
 967 }
 968
 969 static void
 970 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
 971 {
 972         int more = 1;
 973         int negative = (value < 0);
 974         unsigned int size = sizeof (intptr_t) * 8;
 975         uint8_t byte;
 976         uint8_t *p = buf;
 977
 978         while (more) {
 979                 byte = value & 0x7f;
 980                 value >>= 7;
 981
 982                 /* the following is unnecessary if the
 983                  * implementation of >>= uses an arithmetic rather
 984                  * than logical shift for a signed left operand
 985                  */
 986                 if (negative)
 987                         /* sign extend */
 988                         value |= - ((intptr_t) 1 <<(size - 7));
 989
 990                 /* sign bit of byte is second high order bit (0x40) */
 991                 if ((value == 0 && !(byte & 0x40)) ||
 992                     (value == -1 && (byte & 0x40)))
 993                         more = 0;
 994                 else
 995                         byte |= 0x80;
 996
 997                 *p ++= byte;
 998         }
 999
1000         *endbuf = p;
1001 }
1002
1003 static void
1004 emit_byte (LogBuffer *logbuffer, int value)
1005 {
1006         logbuffer->cursor [0] = value;
1007         logbuffer->cursor++;
1008
1009         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1010 }
1011
1012 static void
1013 emit_value (LogBuffer *logbuffer, int value)
1014 {
1015         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1016
1017         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1018 }
1019
1020 static void
1021 emit_time (LogBuffer *logbuffer, uint64_t value)
1022 {
1023         uint64_t tdiff = value - logbuffer->last_time;
1024         encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
1025         logbuffer->last_time = value;
1026
1027         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1028 }
1029
1030 static void
1031 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
1032 {
1033         emit_byte (logbuffer, event);
1034         emit_time (logbuffer, time);
1035 }
1036
1037 static void
1038 emit_event (LogBuffer *logbuffer, int event)
1039 {
1040         emit_event_time (logbuffer, event, current_time ());
1041 }
1042
1043 static void
1044 emit_svalue (LogBuffer *logbuffer, int64_t value)
1045 {
1046         encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1047
1048         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1049 }
1050
1051 static void
1052 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
1053 {
1054         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1055
1056         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1057 }
1058
1059 static void
1060 emit_ptr (LogBuffer *logbuffer, void *ptr)
1061 {
1062         if (!logbuffer->ptr_base)
1063                 logbuffer->ptr_base = (uintptr_t) ptr;
1064
1065         emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
1066
1067         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1068 }
1069
1070 static void
1071 emit_method_inner (LogBuffer *logbuffer, void *method)
1072 {
1073         if (!logbuffer->method_base) {
1074                 logbuffer->method_base = (intptr_t) method;
1075                 logbuffer->last_method = (intptr_t) method;
1076         }
1077
1078         encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1079         logbuffer->last_method = (intptr_t) method;
1080
1081         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1082 }
1083
1084 // The reader lock must be held.
1085 static void
1086 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1087 {
1088         MonoProfilerThread *thread = get_thread ();
1089
1090         if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1091                 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1092
1093                 info->method = method;
1094                 info->ji = ji;
1095                 info->time = current_time ();
1096
1097                 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1098                 g_ptr_array_add (arr, info);
1099         }
1100 }
1101
1102 static void
1103 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1104 {
1105         register_method_local (method, NULL);
1106         emit_method_inner (logbuffer, method);
1107 }
1108
1109 static void
1110 emit_obj (LogBuffer *logbuffer, void *ptr)
1111 {
1112         if (!logbuffer->obj_base)
1113                 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1114
1115         emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1116
1117         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1118 }
1119
1120 static void
1121 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1122 {
1123         size_t i = 0;
1124         if (str) {
1125                 for (; i < size; i++) {
1126                         if (str[i] == '\0')
1127                                 break;
1128                         emit_byte (logbuffer, str [i]);
1129                 }
1130         }
1131         emit_byte (logbuffer, '\0');
1132 }
1133
1134 static void
1135 emit_double (LogBuffer *logbuffer, double value)
1136 {
1137         int i;
1138         unsigned char buffer[8];
1139         memcpy (buffer, &value, 8);
1140 #if G_BYTE_ORDER == G_BIG_ENDIAN
1141         for (i = 7; i >= 0; i--)
1142 #else
1143         for (i = 0; i < 8; i++)
1144 #endif
1145                 emit_byte (logbuffer, buffer[i]);
1146 }
1147
1148 static char*
1149 write_int16 (char *buf, int32_t value)
1150 {
1151         int i;
1152         for (i = 0; i < 2; ++i) {
1153                 buf [i] = value;
1154                 value >>= 8;
1155         }
1156         return buf + 2;
1157 }
1158
1159 static char*
1160 write_int32 (char *buf, int32_t value)
1161 {
1162         int i;
1163         for (i = 0; i < 4; ++i) {
1164                 buf [i] = value;
1165                 value >>= 8;
1166         }
1167         return buf + 4;
1168 }
1169
1170 static char*
1171 write_int64 (char *buf, int64_t value)
1172 {
1173         int i;
1174         for (i = 0; i < 8; ++i) {
1175                 buf [i] = value;
1176                 value >>= 8;
1177         }
1178         return buf + 8;
1179 }
1180
1181 static char *
1182 write_header_string (char *p, const char *str)
1183 {
1184         size_t len = strlen (str) + 1;
1185
1186         p = write_int32 (p, len);
1187         strcpy (p, str);
1188
1189         return p + len;
1190 }
1191
1192 static void
1193 dump_header (MonoProfiler *profiler)
1194 {
1195         const char *args = profiler->args;
1196         const char *arch = mono_config_get_cpu ();
1197         const char *os = mono_config_get_os ();
1198
1199         char *hbuf = g_malloc (
1200                 sizeof (gint32) /* header id */ +
1201                 sizeof (gint8) /* major version */ +
1202                 sizeof (gint8) /* minor version */ +
1203                 sizeof (gint8) /* data version */ +
1204                 sizeof (gint8) /* word size */ +
1205                 sizeof (gint64) /* startup time */ +
1206                 sizeof (gint32) /* timer overhead */ +
1207                 sizeof (gint32) /* flags */ +
1208                 sizeof (gint32) /* process id */ +
1209                 sizeof (gint16) /* command port */ +
1210                 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1211                 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1212                 sizeof (gint32) + strlen (os) + 1 /* operating system */
1213         );
1214         char *p = hbuf;
1215
1216         p = write_int32 (p, LOG_HEADER_ID);
1217         *p++ = LOG_VERSION_MAJOR;
1218         *p++ = LOG_VERSION_MINOR;
1219         *p++ = LOG_DATA_VERSION;
1220         *p++ = sizeof (void *);
1221         p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1222         p = write_int32 (p, timer_overhead);
1223         p = write_int32 (p, 0); /* flags */
1224         p = write_int32 (p, process_id ());
1225         p = write_int16 (p, profiler->command_port);
1226         p = write_header_string (p, args);
1227         p = write_header_string (p, arch);
1228         p = write_header_string (p, os);
1229
1230 #if defined (HAVE_SYS_ZLIB)
1231         if (profiler->gzfile) {
1232                 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1233         } else
1234 #endif
1235         {
1236                 fwrite (hbuf, p - hbuf, 1, profiler->file);
1237                 fflush (profiler->file);
1238         }
1239
1240         g_free (hbuf);
1241 }
1242
1243 /*
1244  * Must be called with the reader lock held if thread is the current thread, or
1245  * the exclusive lock if thread is a different thread. However, if thread is
1246  * the current thread, and init_thread () was called with add_to_lls = FALSE,
1247  * then no locking is necessary.
1248  */
1249 static void
1250 send_buffer (MonoProfilerThread *thread)
1251 {
1252         WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1253         entry->methods = thread->methods;
1254         entry->buffer = thread->buffer;
1255
1256         mono_lock_free_queue_node_init (&entry->node, FALSE);
1257
1258         mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1259         mono_os_sem_post (&thread->profiler->writer_queue_sem);
1260 }
1261
1262 static void
1263 free_thread (gpointer p)
1264 {
1265         MonoProfilerThread *thread = p;
1266
1267         if (!thread->ended) {
1268                 /*
1269                  * The thread is being cleaned up by the main thread during
1270                  * shutdown. This typically happens for internal runtime
1271                  * threads. We need to synthesize a thread end event.
1272                  */
1273
1274                 InterlockedIncrement (&thread_ends_ctr);
1275
1276                 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1277                         LogBuffer *buf = ensure_logbuf_unsafe (thread,
1278                                 EVENT_SIZE /* event */ +
1279                                 BYTE_SIZE /* type */ +
1280                                 LEB128_SIZE /* tid */
1281                         );
1282
1283                         emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1284                         emit_byte (buf, TYPE_THREAD);
1285                         emit_ptr (buf, (void *) thread->node.key);
1286                 }
1287         }
1288
1289         send_buffer (thread);
1290
1291         g_free (thread);
1292 }
1293
1294 static void
1295 remove_thread (MonoProfilerThread *thread)
1296 {
1297         MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1298
1299         if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1300                 mono_thread_hazardous_try_free (thread, free_thread);
1301
1302         clear_hazard_pointers (hp);
1303 }
1304
1305 static void
1306 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1307 {
1308         char hbuf [128];
1309         char *p = hbuf;
1310
1311         if (buf->next)
1312                 dump_buffer (profiler, buf->next);
1313
1314         if (buf->cursor - buf->buf) {
1315                 p = write_int32 (p, BUF_ID);
1316                 p = write_int32 (p, buf->cursor - buf->buf);
1317                 p = write_int64 (p, buf->time_base);
1318                 p = write_int64 (p, buf->ptr_base);
1319                 p = write_int64 (p, buf->obj_base);
1320                 p = write_int64 (p, buf->thread_id);
1321                 p = write_int64 (p, buf->method_base);
1322
1323 #if defined (HAVE_SYS_ZLIB)
1324                 if (profiler->gzfile) {
1325                         gzwrite (profiler->gzfile, hbuf, p - hbuf);
1326                         gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1327                 } else
1328 #endif
1329                 {
1330                         fwrite (hbuf, p - hbuf, 1, profiler->file);
1331                         fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1332                         fflush (profiler->file);
1333                 }
1334         }
1335
1336         free_buffer (buf, buf->size);
1337 }
1338
1339 static void
1340 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1341 {
1342         for (LogBuffer *iter = buf; iter; iter = iter->next)
1343                 iter->thread_id = 0;
1344
1345         dump_buffer (profiler, buf);
1346 }
1347
1348 // Only valid if init_thread () was called with add_to_lls = FALSE.
1349 static void
1350 send_log_unsafe (gboolean if_needed)
1351 {
1352         MonoProfilerThread *thread = PROF_TLS_GET ();
1353
1354         if (!if_needed || (if_needed && thread->buffer->next)) {
1355                 if (!thread->attached)
1356                         for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1357                                 iter->thread_id = 0;
1358
1359                 send_buffer (thread);
1360                 init_buffer_state (thread);
1361         }
1362 }
1363
1364 // Assumes that the exclusive lock is held.
1365 static void
1366 sync_point_flush (void)
1367 {
1368         g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1369
1370         MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1371                 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1372
1373                 send_buffer (thread);
1374                 init_buffer_state (thread);
1375         } MONO_LLS_FOREACH_SAFE_END
1376 }
1377
1378 // Assumes that the exclusive lock is held.
1379 static void
1380 sync_point_mark (MonoProfilerSyncPointType type)
1381 {
1382         g_assert (InterlockedRead (&buffer_lock_state) == PROF_TLS_GET ()->small_id << 16 && "Why don't we hold the exclusive lock?");
1383
1384         ENTER_LOG (&sync_points_ctr, logbuffer,
1385                 EVENT_SIZE /* event */ +
1386                 LEB128_SIZE /* type */
1387         );
1388
1389         emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1390         emit_byte (logbuffer, type);
1391
1392         EXIT_LOG_EXPLICIT (NO_SEND);
1393
1394         send_log_unsafe (FALSE);
1395 }
1396
1397 // Assumes that the exclusive lock is held.
1398 static void
1399 sync_point (MonoProfilerSyncPointType type)
1400 {
1401         sync_point_flush ();
1402         sync_point_mark (type);
1403 }
1404
1405 static int
1406 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1407 {
1408         /* account for object alignment in the heap */
1409         size += 7;
1410         size &= ~7;
1411
1412         ENTER_LOG (&heap_objects_ctr, logbuffer,
1413                 EVENT_SIZE /* event */ +
1414                 LEB128_SIZE /* obj */ +
1415                 LEB128_SIZE /* klass */ +
1416                 LEB128_SIZE /* size */ +
1417                 LEB128_SIZE /* num */ +
1418                 num * (
1419                         LEB128_SIZE /* offset */ +
1420                         LEB128_SIZE /* ref */
1421                 )
1422         );
1423
1424         emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1425         emit_obj (logbuffer, obj);
1426         emit_ptr (logbuffer, klass);
1427         emit_value (logbuffer, size);
1428         emit_value (logbuffer, num);
1429
1430         uintptr_t last_offset = 0;
1431
1432         for (int i = 0; i < num; ++i) {
1433                 emit_value (logbuffer, offsets [i] - last_offset);
1434                 last_offset = offsets [i];
1435                 emit_obj (logbuffer, refs [i]);
1436         }
1437
1438         EXIT_LOG_EXPLICIT (DO_SEND);
1439
1440         return 0;
1441 }
1442
1443 static unsigned int hs_mode_ms = 0;
1444 static unsigned int hs_mode_gc = 0;
1445 static unsigned int hs_mode_ondemand = 0;
1446 static unsigned int gc_count = 0;
1447 static uint64_t last_hs_time = 0;
1448 static gboolean do_heap_walk = FALSE;
1449 static gboolean ignore_heap_events;
1450
1451 static void
1452 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
1453 {
1454         if (ignore_heap_events)
1455                 return;
1456
1457         ENTER_LOG (&heap_roots_ctr, logbuffer,
1458                 EVENT_SIZE /* event */ +
1459                 LEB128_SIZE /* num */ +
1460                 LEB128_SIZE /* collections */ +
1461                 num * (
1462                         LEB128_SIZE /* object */ +
1463                         LEB128_SIZE /* root type */ +
1464                         LEB128_SIZE /* extra info */
1465                 )
1466         );
1467
1468         emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1469         emit_value (logbuffer, num);
1470         emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1471
1472         for (int i = 0; i < num; ++i) {
1473                 emit_obj (logbuffer, objects [i]);
1474                 emit_byte (logbuffer, root_types [i]);
1475                 emit_value (logbuffer, extra_info [i]);
1476         }
1477
1478         EXIT_LOG_EXPLICIT (DO_SEND);
1479 }
1480
1481
1482 static void
1483 trigger_on_demand_heapshot (void)
1484 {
1485         if (heapshot_requested)
1486                 mono_gc_collect (mono_gc_max_generation ());
1487 }
1488
1489 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1490
1491 static void
1492 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation)
1493 {
1494         if (ev == MONO_GC_EVENT_START) {
1495                 uint64_t now = current_time ();
1496
1497                 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1498                         do_heap_walk = TRUE;
1499                 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1500                         do_heap_walk = TRUE;
1501                 else if (hs_mode_ondemand)
1502                         do_heap_walk = heapshot_requested;
1503                 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1504                         do_heap_walk = TRUE;
1505
1506                 //If using heapshot, ignore events for collections we don't care
1507                 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1508                         // Ignore events generated during the collection itself (IE GC ROOTS)
1509                         ignore_heap_events = !do_heap_walk;
1510                 }
1511         }
1512
1513
1514         if (ENABLED (PROFLOG_GC_EVENTS)) {
1515                 ENTER_LOG (&gc_events_ctr, logbuffer,
1516                         EVENT_SIZE /* event */ +
1517                         BYTE_SIZE /* gc event */ +
1518                         BYTE_SIZE /* generation */
1519                 );
1520
1521                 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1522                 emit_byte (logbuffer, ev);
1523                 emit_byte (logbuffer, generation);
1524
1525                 EXIT_LOG_EXPLICIT (NO_SEND);
1526         }
1527
1528         switch (ev) {
1529         case MONO_GC_EVENT_START:
1530                 if (generation == mono_gc_max_generation ())
1531                         gc_count++;
1532
1533                 break;
1534         case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1535                 /*
1536                  * Ensure that no thread can be in the middle of writing to
1537                  * a buffer when the world stops...
1538                  */
1539                 buffer_lock_excl ();
1540                 break;
1541         case MONO_GC_EVENT_POST_STOP_WORLD:
1542                 /*
1543                  * ... So that we now have a consistent view of all buffers.
1544                  * This allows us to flush them. We need to do this because
1545                  * they may contain object allocation events that need to be
1546                  * committed to the log file before any object move events
1547                  * that will be produced during this GC.
1548                  */
1549                 if (ENABLED (ALL_GC_EVENTS_MASK))
1550                         sync_point (SYNC_POINT_WORLD_STOP);
1551
1552                 /*
1553                  * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1554                  * Right now, that's the case for GC Moves, GC Roots or heapshots.
1555                  */
1556                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1557                         ENTER_LOG (&heap_starts_ctr, logbuffer,
1558                                 EVENT_SIZE /* event */
1559                         );
1560
1561                         emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1562
1563                         EXIT_LOG_EXPLICIT (DO_SEND);
1564                 }
1565
1566                 break;
1567         case MONO_GC_EVENT_PRE_START_WORLD:
1568                 if (do_heap_shot && do_heap_walk)
1569                         mono_gc_walk_heap (0, gc_reference, NULL);
1570
1571                 /* Matching HEAP_END to the HEAP_START from above */
1572                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1573                         ENTER_LOG (&heap_ends_ctr, logbuffer,
1574                                 EVENT_SIZE /* event */
1575                         );
1576
1577                         emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1578
1579                         EXIT_LOG_EXPLICIT (DO_SEND);
1580                 }
1581
1582                 if (do_heap_shot && do_heap_walk) {
1583                         do_heap_walk = FALSE;
1584                         heapshot_requested = 0;
1585                         last_hs_time = current_time ();
1586                 }
1587
1588                 /*
1589                  * Similarly, we must now make sure that any object moves
1590                  * written to the GC thread's buffer are flushed. Otherwise,
1591                  * object allocation events for certain addresses could come
1592                  * after the move events that made those addresses available.
1593                  */
1594                 if (ENABLED (ALL_GC_EVENTS_MASK))
1595                         sync_point_mark (SYNC_POINT_WORLD_START);
1596                 break;
1597         case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1598                 /*
1599                  * Finally, it is safe to allow other threads to write to
1600                  * their buffers again.
1601                  */
1602                 buffer_unlock_excl ();
1603                 break;
1604         default:
1605                 break;
1606         }
1607 }
1608
1609 static void
1610 gc_resize (MonoProfiler *profiler, int64_t new_size)
1611 {
1612         ENTER_LOG (&gc_resizes_ctr, logbuffer,
1613                 EVENT_SIZE /* event */ +
1614                 LEB128_SIZE /* new size */
1615         );
1616
1617         emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1618         emit_value (logbuffer, new_size);
1619
1620         EXIT_LOG_EXPLICIT (DO_SEND);
1621 }
1622
1623 typedef struct {
1624         int count;
1625         MonoMethod* methods [MAX_FRAMES];
1626         int32_t il_offsets [MAX_FRAMES];
1627         int32_t native_offsets [MAX_FRAMES];
1628 } FrameData;
1629
1630 static int num_frames = MAX_FRAMES;
1631
1632 static mono_bool
1633 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1634 {
1635         FrameData *frame = (FrameData *)data;
1636         if (method && frame->count < num_frames) {
1637                 frame->il_offsets [frame->count] = il_offset;
1638                 frame->native_offsets [frame->count] = native_offset;
1639                 frame->methods [frame->count++] = method;
1640                 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1641         }
1642         return frame->count == num_frames;
1643 }
1644
1645 /*
1646  * a note about stack walks: they can cause more profiler events to fire,
1647  * so we need to make sure they don't happen after we started emitting an
1648  * event, hence the collect_bt/emit_bt split.
1649  */
1650 static void
1651 collect_bt (FrameData *data)
1652 {
1653         data->count = 0;
1654         mono_stack_walk_no_il (walk_stack, data);
1655 }
1656
1657 static void
1658 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1659 {
1660         if (data->count > num_frames)
1661                 printf ("bad num frames: %d\n", data->count);
1662
1663         emit_value (logbuffer, data->count);
1664
1665         while (data->count)
1666                 emit_method (logbuffer, data->methods [--data->count]);
1667 }
1668
1669 static void
1670 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
1671 {
1672         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1673         FrameData data;
1674         uintptr_t len = mono_object_get_size (obj);
1675         /* account for object alignment in the heap */
1676         len += 7;
1677         len &= ~7;
1678
1679         if (do_bt)
1680                 collect_bt (&data);
1681
1682         ENTER_LOG (&gc_allocs_ctr, logbuffer,
1683                 EVENT_SIZE /* event */ +
1684                 LEB128_SIZE /* klass */ +
1685                 LEB128_SIZE /* obj */ +
1686                 LEB128_SIZE /* size */ +
1687                 (do_bt ? (
1688                         LEB128_SIZE /* count */ +
1689                         data.count * (
1690                                 LEB128_SIZE /* method */
1691                         )
1692                 ) : 0)
1693         );
1694
1695         emit_event (logbuffer, do_bt | TYPE_ALLOC);
1696         emit_ptr (logbuffer, klass);
1697         emit_obj (logbuffer, obj);
1698         emit_value (logbuffer, len);
1699
1700         if (do_bt)
1701                 emit_bt (prof, logbuffer, &data);
1702
1703         EXIT_LOG;
1704 }
1705
1706 static void
1707 gc_moves (MonoProfiler *prof, void **objects, int num)
1708 {
1709         ENTER_LOG (&gc_moves_ctr, logbuffer,
1710                 EVENT_SIZE /* event */ +
1711                 LEB128_SIZE /* num */ +
1712                 num * (
1713                         LEB128_SIZE /* object */
1714                 )
1715         );
1716
1717         emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1718         emit_value (logbuffer, num);
1719
1720         for (int i = 0; i < num; ++i)
1721                 emit_obj (logbuffer, objects [i]);
1722
1723         EXIT_LOG_EXPLICIT (DO_SEND);
1724 }
1725
1726 static void
1727 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
1728 {
1729         int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1730         FrameData data;
1731
1732         if (do_bt)
1733                 collect_bt (&data);
1734
1735         gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1736
1737         ENTER_LOG (ctr, logbuffer,
1738                 EVENT_SIZE /* event */ +
1739                 LEB128_SIZE /* type */ +
1740                 LEB128_SIZE /* handle */ +
1741                 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1742                         LEB128_SIZE /* obj */
1743                 ) : 0) +
1744                 (do_bt ? (
1745                         LEB128_SIZE /* count */ +
1746                         data.count * (
1747                                 LEB128_SIZE /* method */
1748                         )
1749                 ) : 0)
1750         );
1751
1752         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1753                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1754         else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1755                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1756         else
1757                 g_assert_not_reached ();
1758
1759         emit_value (logbuffer, type);
1760         emit_value (logbuffer, handle);
1761
1762         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1763                 emit_obj (logbuffer, obj);
1764
1765         if (do_bt)
1766                 emit_bt (prof, logbuffer, &data);
1767
1768         EXIT_LOG;
1769 }
1770
1771 static void
1772 finalize_begin (MonoProfiler *prof)
1773 {
1774         ENTER_LOG (&finalize_begins_ctr, buf,
1775                 EVENT_SIZE /* event */
1776         );
1777
1778         emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1779
1780         EXIT_LOG;
1781 }
1782
1783 static void
1784 finalize_end (MonoProfiler *prof)
1785 {
1786         trigger_on_demand_heapshot ();
1787         if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1788                 ENTER_LOG (&finalize_ends_ctr, buf,
1789                         EVENT_SIZE /* event */
1790                 );
1791
1792                 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1793
1794                 EXIT_LOG;
1795         }
1796 }
1797
1798 static void
1799 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1800 {
1801         ENTER_LOG (&finalize_object_begins_ctr, buf,
1802                 EVENT_SIZE /* event */ +
1803                 LEB128_SIZE /* obj */
1804         );
1805
1806         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1807         emit_obj (buf, obj);
1808
1809         EXIT_LOG;
1810 }
1811
1812 static void
1813 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1814 {
1815         ENTER_LOG (&finalize_object_ends_ctr, buf,
1816                 EVENT_SIZE /* event */ +
1817                 LEB128_SIZE /* obj */
1818         );
1819
1820         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1821         emit_obj (buf, obj);
1822
1823         EXIT_LOG;
1824 }
1825
1826 static char*
1827 push_nesting (char *p, MonoClass *klass)
1828 {
1829         MonoClass *nesting;
1830         const char *name;
1831         const char *nspace;
1832         nesting = mono_class_get_nesting_type (klass);
1833         if (nesting) {
1834                 p = push_nesting (p, nesting);
1835                 *p++ = '/';
1836                 *p = 0;
1837         }
1838         name = mono_class_get_name (klass);
1839         nspace = mono_class_get_namespace (klass);
1840         if (*nspace) {
1841                 strcpy (p, nspace);
1842                 p += strlen (nspace);
1843                 *p++ = '.';
1844                 *p = 0;
1845         }
1846         strcpy (p, name);
1847         p += strlen (name);
1848         return p;
1849 }
1850
1851 static char*
1852 type_name (MonoClass *klass)
1853 {
1854         char buf [1024];
1855         char *p;
1856         push_nesting (buf, klass);
1857         p = (char *) g_malloc (strlen (buf) + 1);
1858         strcpy (p, buf);
1859         return p;
1860 }
1861
1862 static void
1863 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
1864 {
1865         if (result != MONO_PROFILE_OK)
1866                 return;
1867
1868         const char *name = mono_image_get_filename (image);
1869         int nlen = strlen (name) + 1;
1870
1871         ENTER_LOG (&image_loads_ctr, logbuffer,
1872                 EVENT_SIZE /* event */ +
1873                 BYTE_SIZE /* type */ +
1874                 LEB128_SIZE /* image */ +
1875                 nlen /* name */
1876         );
1877
1878         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1879         emit_byte (logbuffer, TYPE_IMAGE);
1880         emit_ptr (logbuffer, image);
1881         memcpy (logbuffer->cursor, name, nlen);
1882         logbuffer->cursor += nlen;
1883
1884         EXIT_LOG;
1885 }
1886
1887 static void
1888 image_unloaded (MonoProfiler *prof, MonoImage *image)
1889 {
1890         const char *name = mono_image_get_filename (image);
1891         int nlen = strlen (name) + 1;
1892
1893         ENTER_LOG (&image_unloads_ctr, logbuffer,
1894                 EVENT_SIZE /* event */ +
1895                 BYTE_SIZE /* type */ +
1896                 LEB128_SIZE /* image */ +
1897                 nlen /* name */
1898         );
1899
1900         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1901         emit_byte (logbuffer, TYPE_IMAGE);
1902         emit_ptr (logbuffer, image);
1903         memcpy (logbuffer->cursor, name, nlen);
1904         logbuffer->cursor += nlen;
1905
1906         EXIT_LOG;
1907 }
1908
1909 static void
1910 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly, int result)
1911 {
1912         if (result != MONO_PROFILE_OK)
1913                 return;
1914
1915         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1916         int nlen = strlen (name) + 1;
1917         MonoImage *image = mono_assembly_get_image (assembly);
1918
1919         ENTER_LOG (&assembly_loads_ctr, logbuffer,
1920                 EVENT_SIZE /* event */ +
1921                 BYTE_SIZE /* type */ +
1922                 LEB128_SIZE /* assembly */ +
1923                 LEB128_SIZE /* image */ +
1924                 nlen /* name */
1925         );
1926
1927         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1928         emit_byte (logbuffer, TYPE_ASSEMBLY);
1929         emit_ptr (logbuffer, assembly);
1930         emit_ptr (logbuffer, image);
1931         memcpy (logbuffer->cursor, name, nlen);
1932         logbuffer->cursor += nlen;
1933
1934         EXIT_LOG;
1935
1936         mono_free (name);
1937 }
1938
1939 static void
1940 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1941 {
1942         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1943         int nlen = strlen (name) + 1;
1944         MonoImage *image = mono_assembly_get_image (assembly);
1945
1946         ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1947                 EVENT_SIZE /* event */ +
1948                 BYTE_SIZE /* type */ +
1949                 LEB128_SIZE /* assembly */ +
1950                 LEB128_SIZE /* image */ +
1951                 nlen /* name */
1952         );
1953
1954         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1955         emit_byte (logbuffer, TYPE_ASSEMBLY);
1956         emit_ptr (logbuffer, assembly);
1957         emit_ptr (logbuffer, image);
1958         memcpy (logbuffer->cursor, name, nlen);
1959         logbuffer->cursor += nlen;
1960
1961         EXIT_LOG;
1962
1963         mono_free (name);
1964 }
1965
1966 static void
1967 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
1968 {
1969         if (result != MONO_PROFILE_OK)
1970                 return;
1971
1972         char *name;
1973
1974         if (InterlockedRead (&runtime_inited))
1975                 name = mono_type_get_name (mono_class_get_type (klass));
1976         else
1977                 name = type_name (klass);
1978
1979         int nlen = strlen (name) + 1;
1980         MonoImage *image = mono_class_get_image (klass);
1981
1982         ENTER_LOG (&class_loads_ctr, logbuffer,
1983                 EVENT_SIZE /* event */ +
1984                 BYTE_SIZE /* type */ +
1985                 LEB128_SIZE /* klass */ +
1986                 LEB128_SIZE /* image */ +
1987                 nlen /* name */
1988         );
1989
1990         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1991         emit_byte (logbuffer, TYPE_CLASS);
1992         emit_ptr (logbuffer, klass);
1993         emit_ptr (logbuffer, image);
1994         memcpy (logbuffer->cursor, name, nlen);
1995         logbuffer->cursor += nlen;
1996
1997         EXIT_LOG;
1998
1999         if (runtime_inited)
2000                 mono_free (name);
2001         else
2002                 g_free (name);
2003 }
2004
2005 static void process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method);
2006
2007 static void
2008 method_enter (MonoProfiler *prof, MonoMethod *method)
2009 {
2010         process_method_enter_coverage (prof, method);
2011
2012         if (!only_coverage && get_thread ()->call_depth++ <= max_call_depth) {
2013                 ENTER_LOG (&method_entries_ctr, logbuffer,
2014                         EVENT_SIZE /* event */ +
2015                         LEB128_SIZE /* method */
2016                 );
2017
2018                 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
2019                 emit_method (logbuffer, method);
2020
2021                 EXIT_LOG;
2022         }
2023 }
2024
2025 static void
2026 method_leave (MonoProfiler *prof, MonoMethod *method)
2027 {
2028         if (!only_coverage && --get_thread ()->call_depth <= max_call_depth) {
2029                 ENTER_LOG (&method_exits_ctr, logbuffer,
2030                         EVENT_SIZE /* event */ +
2031                         LEB128_SIZE /* method */
2032                 );
2033
2034                 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2035                 emit_method (logbuffer, method);
2036
2037                 EXIT_LOG;
2038         }
2039 }
2040
2041 static void
2042 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
2043 {
2044         if (!only_coverage && !nocalls && --get_thread ()->call_depth <= max_call_depth) {
2045                 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2046                         EVENT_SIZE /* event */ +
2047                         LEB128_SIZE /* method */
2048                 );
2049
2050                 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2051                 emit_method (logbuffer, method);
2052
2053                 EXIT_LOG;
2054         }
2055 }
2056
2057 static void
2058 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji, int result)
2059 {
2060         if (result != MONO_PROFILE_OK)
2061                 return;
2062
2063         buffer_lock ();
2064
2065         register_method_local (method, ji);
2066
2067         buffer_unlock ();
2068 }
2069
2070 static void
2071 code_buffer_new (MonoProfiler *prof, void *buffer, int size, MonoProfilerCodeBufferType type, void *data)
2072 {
2073         char *name;
2074         int nlen;
2075
2076         if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2077                 name = (char *) data;
2078                 nlen = strlen (name) + 1;
2079         } else {
2080                 name = NULL;
2081                 nlen = 0;
2082         }
2083
2084         ENTER_LOG (&code_buffers_ctr, logbuffer,
2085                 EVENT_SIZE /* event */ +
2086                 BYTE_SIZE /* type */ +
2087                 LEB128_SIZE /* buffer */ +
2088                 LEB128_SIZE /* size */ +
2089                 (name ? (
2090                         nlen /* name */
2091                 ) : 0)
2092         );
2093
2094         emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2095         emit_byte (logbuffer, type);
2096         emit_ptr (logbuffer, buffer);
2097         emit_value (logbuffer, size);
2098
2099         if (name) {
2100                 memcpy (logbuffer->cursor, name, nlen);
2101                 logbuffer->cursor += nlen;
2102         }
2103
2104         EXIT_LOG;
2105 }
2106
2107 static void
2108 throw_exc (MonoProfiler *prof, MonoObject *object)
2109 {
2110         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2111         FrameData data;
2112
2113         if (do_bt)
2114                 collect_bt (&data);
2115
2116         ENTER_LOG (&exception_throws_ctr, logbuffer,
2117                 EVENT_SIZE /* event */ +
2118                 LEB128_SIZE /* object */ +
2119                 (do_bt ? (
2120                         LEB128_SIZE /* count */ +
2121                         data.count * (
2122                                 LEB128_SIZE /* method */
2123                         )
2124                 ) : 0)
2125         );
2126
2127         emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2128         emit_obj (logbuffer, object);
2129
2130         if (do_bt)
2131                 emit_bt (prof, logbuffer, &data);
2132
2133         EXIT_LOG;
2134 }
2135
2136 static void
2137 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num, MonoObject *exc)
2138 {
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 */
2144         );
2145
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);
2151
2152         EXIT_LOG;
2153 }
2154
2155 static void
2156 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2157 {
2158         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2159         FrameData data;
2160
2161         if (do_bt)
2162                 collect_bt (&data);
2163
2164         ENTER_LOG (&monitor_events_ctr, logbuffer,
2165                 EVENT_SIZE /* event */ +
2166                 BYTE_SIZE /* ev */ +
2167                 LEB128_SIZE /* object */ +
2168                 (do_bt ? (
2169                         LEB128_SIZE /* count */ +
2170                         data.count * (
2171                                 LEB128_SIZE /* method */
2172                         )
2173                 ) : 0)
2174         );
2175
2176         emit_event (logbuffer, do_bt | TYPE_MONITOR);
2177         emit_byte (logbuffer, ev);
2178         emit_obj (logbuffer, object);
2179
2180         if (do_bt)
2181                 emit_bt (profiler, logbuffer, &data);
2182
2183         EXIT_LOG;
2184 }
2185
2186 static void
2187 thread_start (MonoProfiler *prof, uintptr_t tid)
2188 {
2189         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2190                 ENTER_LOG (&thread_starts_ctr, logbuffer,
2191                         EVENT_SIZE /* event */ +
2192                         BYTE_SIZE /* type */ +
2193                         LEB128_SIZE /* tid */
2194                 );
2195
2196                 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2197                 emit_byte (logbuffer, TYPE_THREAD);
2198                 emit_ptr (logbuffer, (void*) tid);
2199
2200                 EXIT_LOG;
2201         }
2202 }
2203
2204 static void
2205 thread_end (MonoProfiler *prof, uintptr_t tid)
2206 {
2207         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2208                 ENTER_LOG (&thread_ends_ctr, logbuffer,
2209                         EVENT_SIZE /* event */ +
2210                         BYTE_SIZE /* type */ +
2211                         LEB128_SIZE /* tid */
2212                 );
2213
2214                 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2215                 emit_byte (logbuffer, TYPE_THREAD);
2216                 emit_ptr (logbuffer, (void*) tid);
2217
2218                 EXIT_LOG_EXPLICIT (NO_SEND);
2219         }
2220
2221         MonoProfilerThread *thread = get_thread ();
2222
2223         thread->ended = TRUE;
2224         remove_thread (thread);
2225
2226         PROF_TLS_SET (NULL);
2227 }
2228
2229 static void
2230 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2231 {
2232         int len = strlen (name) + 1;
2233
2234         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2235                 ENTER_LOG (&thread_names_ctr, logbuffer,
2236                         EVENT_SIZE /* event */ +
2237                         BYTE_SIZE /* type */ +
2238                         LEB128_SIZE /* tid */ +
2239                         len /* name */
2240                 );
2241
2242                 emit_event (logbuffer, TYPE_METADATA);
2243                 emit_byte (logbuffer, TYPE_THREAD);
2244                 emit_ptr (logbuffer, (void*)tid);
2245                 memcpy (logbuffer->cursor, name, len);
2246                 logbuffer->cursor += len;
2247
2248                 EXIT_LOG;
2249         }
2250 }
2251
2252 static void
2253 domain_loaded (MonoProfiler *prof, MonoDomain *domain, int result)
2254 {
2255         if (result != MONO_PROFILE_OK)
2256                 return;
2257
2258         ENTER_LOG (&domain_loads_ctr, logbuffer,
2259                 EVENT_SIZE /* event */ +
2260                 BYTE_SIZE /* type */ +
2261                 LEB128_SIZE /* domain id */
2262         );
2263
2264         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2265         emit_byte (logbuffer, TYPE_DOMAIN);
2266         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2267
2268         EXIT_LOG;
2269 }
2270
2271 static void
2272 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2273 {
2274         ENTER_LOG (&domain_unloads_ctr, logbuffer,
2275                 EVENT_SIZE /* event */ +
2276                 BYTE_SIZE /* type */ +
2277                 LEB128_SIZE /* domain id */
2278         );
2279
2280         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2281         emit_byte (logbuffer, TYPE_DOMAIN);
2282         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2283
2284         EXIT_LOG;
2285 }
2286
2287 static void
2288 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2289 {
2290         int nlen = strlen (name) + 1;
2291
2292         ENTER_LOG (&domain_names_ctr, logbuffer,
2293                 EVENT_SIZE /* event */ +
2294                 BYTE_SIZE /* type */ +
2295                 LEB128_SIZE /* domain id */ +
2296                 nlen /* name */
2297         );
2298
2299         emit_event (logbuffer, TYPE_METADATA);
2300         emit_byte (logbuffer, TYPE_DOMAIN);
2301         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2302         memcpy (logbuffer->cursor, name, nlen);
2303         logbuffer->cursor += nlen;
2304
2305         EXIT_LOG;
2306 }
2307
2308 static void
2309 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2310 {
2311         ENTER_LOG (&context_loads_ctr, logbuffer,
2312                 EVENT_SIZE /* event */ +
2313                 BYTE_SIZE /* type */ +
2314                 LEB128_SIZE /* context id */ +
2315                 LEB128_SIZE /* domain id */
2316         );
2317
2318         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2319         emit_byte (logbuffer, TYPE_CONTEXT);
2320         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2321         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2322
2323         EXIT_LOG;
2324 }
2325
2326 static void
2327 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2328 {
2329         ENTER_LOG (&context_unloads_ctr, logbuffer,
2330                 EVENT_SIZE /* event */ +
2331                 BYTE_SIZE /* type */ +
2332                 LEB128_SIZE /* context id */ +
2333                 LEB128_SIZE /* domain id */
2334         );
2335
2336         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2337         emit_byte (logbuffer, TYPE_CONTEXT);
2338         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2339         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2340
2341         EXIT_LOG;
2342 }
2343
2344 typedef struct {
2345         MonoMethod *method;
2346         MonoDomain *domain;
2347         void *base_address;
2348         int offset;
2349 } AsyncFrameInfo;
2350
2351 typedef struct {
2352         MonoLockFreeQueueNode node;
2353         MonoProfiler *prof;
2354         uint64_t time;
2355         uintptr_t tid;
2356         void *ip;
2357         int count;
2358         AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2359 } SampleHit;
2360
2361 static mono_bool
2362 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2363 {
2364         SampleHit *sample = (SampleHit *) data;
2365
2366         if (sample->count < num_frames) {
2367                 int i = sample->count;
2368
2369                 sample->frames [i].method = method;
2370                 sample->frames [i].domain = domain;
2371                 sample->frames [i].base_address = base_address;
2372                 sample->frames [i].offset = offset;
2373
2374                 sample->count++;
2375         }
2376
2377         return sample->count == num_frames;
2378 }
2379
2380 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2381 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2382
2383 static void
2384 enqueue_sample_hit (gpointer p)
2385 {
2386         SampleHit *sample = p;
2387
2388         mono_lock_free_queue_node_unpoison (&sample->node);
2389         mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2390         mono_os_sem_post (&sample->prof->dumper_queue_sem);
2391 }
2392
2393 static void
2394 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
2395 {
2396         /*
2397          * Please note: We rely on the runtime loading the profiler with
2398          * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2399          * this function (and its siblings) are resolved when the profiler is
2400          * loaded. Otherwise, we would potentially invoke the dynamic linker when
2401          * invoking runtime functions, which is not async-signal-safe.
2402          */
2403
2404         if (InterlockedRead (&in_shutdown))
2405                 return;
2406
2407         SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2408
2409         if (!sample) {
2410                 /*
2411                  * If we're out of reusable sample events and we're not allowed to
2412                  * allocate more, we have no choice but to drop the event.
2413                  */
2414                 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2415                         return;
2416
2417                 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2418                 sample->prof = profiler;
2419                 mono_lock_free_queue_node_init (&sample->node, TRUE);
2420
2421                 InterlockedIncrement (&sample_allocations_ctr);
2422         }
2423
2424         sample->count = 0;
2425         mono_stack_walk_async_safe (&async_walk_stack, context, sample);
2426
2427         sample->time = current_time ();
2428         sample->tid = thread_id ();
2429         sample->ip = ip;
2430
2431         mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2432 }
2433
2434 static uintptr_t *code_pages = 0;
2435 static int num_code_pages = 0;
2436 static int size_code_pages = 0;
2437 #define CPAGE_SHIFT (9)
2438 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2439 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2440 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2441
2442 static uintptr_t
2443 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2444 {
2445         uintptr_t i;
2446         uintptr_t start_pos;
2447         start_pos = (page >> CPAGE_SHIFT) % hsize;
2448         i = start_pos;
2449         do {
2450                 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2451                         return 0;
2452                 } else if (!hash [i]) {
2453                         hash [i] = page;
2454                         return 1;
2455                 }
2456                 /* wrap around */
2457                 if (++i == hsize)
2458                         i = 0;
2459         } while (i != start_pos);
2460         /* should not happen */
2461         printf ("failed code page store\n");
2462         return 0;
2463 }
2464
2465 static void
2466 add_code_pointer (uintptr_t ip)
2467 {
2468         uintptr_t i;
2469         if (num_code_pages * 2 >= size_code_pages) {
2470                 uintptr_t *n;
2471                 uintptr_t old_size = size_code_pages;
2472                 size_code_pages *= 2;
2473                 if (size_code_pages == 0)
2474                         size_code_pages = 16;
2475                 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2476                 for (i = 0; i < old_size; ++i) {
2477                         if (code_pages [i])
2478                                 add_code_page (n, size_code_pages, code_pages [i]);
2479                 }
2480                 if (code_pages)
2481                         g_free (code_pages);
2482                 code_pages = n;
2483         }
2484         num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2485 }
2486
2487 /* ELF code crashes on some systems. */
2488 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2489 #if 0
2490 static void
2491 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2492 {
2493         int len = strlen (filename) + 1;
2494
2495         ENTER_LOG (&sample_ubins_ctr, logbuffer,
2496                 EVENT_SIZE /* event */ +
2497                 LEB128_SIZE /* load address */ +
2498                 LEB128_SIZE /* offset */ +
2499                 LEB128_SIZE /* size */ +
2500                 nlen /* file name */
2501         );
2502
2503         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2504         emit_ptr (logbuffer, load_addr);
2505         emit_uvalue (logbuffer, offset);
2506         emit_uvalue (logbuffer, size);
2507         memcpy (logbuffer->cursor, filename, len);
2508         logbuffer->cursor += len;
2509
2510         EXIT_LOG_EXPLICIT (DO_SEND);
2511 }
2512 #endif
2513
2514 static void
2515 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2516 {
2517         int len = strlen (name) + 1;
2518
2519         ENTER_LOG (&sample_usyms_ctr, logbuffer,
2520                 EVENT_SIZE /* event */ +
2521                 LEB128_SIZE /* value */ +
2522                 LEB128_SIZE /* size */ +
2523                 len /* name */
2524         );
2525
2526         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2527         emit_ptr (logbuffer, (void*)value);
2528         emit_value (logbuffer, size);
2529         memcpy (logbuffer->cursor, name, len);
2530         logbuffer->cursor += len;
2531
2532         EXIT_LOG_EXPLICIT (DO_SEND);
2533 }
2534
2535 /* ELF code crashes on some systems. */
2536 //#if defined(ELFMAG0)
2537 #if 0
2538
2539 #if SIZEOF_VOID_P == 4
2540 #define ELF_WSIZE 32
2541 #else
2542 #define ELF_WSIZE 64
2543 #endif
2544 #ifndef ElfW
2545 #define ElfW(type)      _ElfW (Elf, ELF_WSIZE, type)
2546 #define _ElfW(e,w,t)    _ElfW_1 (e, w, _##t)
2547 #define _ElfW_1(e,w,t)  e##w##t
2548 #endif
2549
2550 static void
2551 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2552 {
2553         int i;
2554         for (i = 0; i < num_symbols; ++i) {
2555                 const char* sym;
2556                 sym =  strtab + symbols [i].st_name;
2557                 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2558                         continue;
2559                 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2560                 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2561         }
2562 }
2563
2564 static int
2565 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2566 {
2567         int fd, i;
2568         void *data;
2569         struct stat statb;
2570         uint64_t file_size;
2571         ElfW(Ehdr) *header;
2572         ElfW(Shdr) *sheader;
2573         ElfW(Shdr) *shstrtabh;
2574         ElfW(Shdr) *symtabh = NULL;
2575         ElfW(Shdr) *strtabh = NULL;
2576         ElfW(Sym) *symbols = NULL;
2577         const char *strtab;
2578         int num_symbols;
2579
2580         fd = open (filename, O_RDONLY);
2581         if (fd < 0)
2582                 return 0;
2583         if (fstat (fd, &statb) != 0) {
2584                 close (fd);
2585                 return 0;
2586         }
2587         file_size = statb.st_size;
2588         data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2589         close (fd);
2590         if (data == MAP_FAILED)
2591                 return 0;
2592         header = data;
2593         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2594                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2595                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2596                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2597                 munmap (data, file_size);
2598                 return 0;
2599         }
2600         sheader = (void*)((char*)data + header->e_shoff);
2601         shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2602         strtab = (const char*)data + shstrtabh->sh_offset;
2603         for (i = 0; i < header->e_shnum; ++i) {
2604                 //printf ("section header: %d\n", sheader->sh_type);
2605                 if (sheader->sh_type == SHT_SYMTAB) {
2606                         symtabh = sheader;
2607                         strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2608                         /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2609                         break;
2610                 }
2611                 sheader = (void*)((char*)sheader + header->e_shentsize);
2612         }
2613         if (!symtabh || !strtabh) {
2614                 munmap (data, file_size);
2615                 return 0;
2616         }
2617         strtab = (const char*)data + strtabh->sh_offset;
2618         num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2619         symbols = (void*)((char*)data + symtabh->sh_offset);
2620         dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2621         munmap (data, file_size);
2622         return 1;
2623 }
2624 #endif
2625
2626 /* ELF code crashes on some systems. */
2627 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2628 #if 0
2629 static int
2630 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2631 {
2632         MonoProfiler *prof = data;
2633         char buf [256];
2634         const char *filename;
2635         BinaryObject *obj;
2636         char *a = (void*)info->dlpi_addr;
2637         int i, num_sym;
2638         ElfW(Dyn) *dyn = NULL;
2639         ElfW(Sym) *symtab = NULL;
2640         ElfW(Word) *hash_table = NULL;
2641         ElfW(Ehdr) *header = NULL;
2642         const char* strtab = NULL;
2643         for (obj = prof->binary_objects; obj; obj = obj->next) {
2644                 if (obj->addr == a)
2645                         return 0;
2646         }
2647         filename = info->dlpi_name;
2648         if (!filename)
2649                 return 0;
2650         if (!info->dlpi_addr && !filename [0]) {
2651                 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2652                 if (l > 0) {
2653                         buf [l] = 0;
2654                         filename = buf;
2655                 }
2656         }
2657         obj = g_calloc (sizeof (BinaryObject), 1);
2658         obj->addr = (void*)info->dlpi_addr;
2659         obj->name = pstrdup (filename);
2660         obj->next = prof->binary_objects;
2661         prof->binary_objects = obj;
2662         //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2663         a = NULL;
2664         for (i = 0; i < info->dlpi_phnum; ++i) {
2665                 //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);
2666                 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2667                         header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2668                         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2669                                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2670                                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2671                                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2672                                 header = NULL;
2673                         }
2674                         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);
2675                 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2676                         dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2677                 }
2678         }
2679         if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2680                 return 0;
2681         if (!info->dlpi_name || !info->dlpi_name[0])
2682                 return 0;
2683         if (!dyn)
2684                 return 0;
2685         for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2686                 if (dyn [i].d_tag == DT_SYMTAB) {
2687                         if (symtab && do_debug)
2688                                 printf ("multiple symtabs: %d\n", i);
2689                         symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2690                 } else if (dyn [i].d_tag == DT_HASH) {
2691                         hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2692                 } else if (dyn [i].d_tag == DT_STRTAB) {
2693                         strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2694                 }
2695         }
2696         if (!hash_table)
2697                 return 0;
2698         num_sym = hash_table [1];
2699         dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2700         return 0;
2701 }
2702
2703 static int
2704 load_binaries (MonoProfiler *prof)
2705 {
2706         dl_iterate_phdr (elf_dl_callback, prof);
2707         return 1;
2708 }
2709 #else
2710 static int
2711 load_binaries (MonoProfiler *prof)
2712 {
2713         return 0;
2714 }
2715 #endif
2716
2717 static const char*
2718 symbol_for (uintptr_t code)
2719 {
2720 #ifdef HAVE_DLADDR
2721         void *ip = (void*)code;
2722         Dl_info di;
2723         if (dladdr (ip, &di)) {
2724                 if (di.dli_sname)
2725                         return di.dli_sname;
2726         } else {
2727         /*      char **names;
2728                 names = backtrace_symbols (&ip, 1);
2729                 if (names) {
2730                         const char* p = names [0];
2731                         g_free (names);
2732                         return p;
2733                 }
2734                 */
2735         }
2736 #endif
2737         return NULL;
2738 }
2739
2740 static void
2741 dump_unmanaged_coderefs (MonoProfiler *prof)
2742 {
2743         int i;
2744         const char* last_symbol;
2745         uintptr_t addr, page_end;
2746
2747         if (load_binaries (prof))
2748                 return;
2749         for (i = 0; i < size_code_pages; ++i) {
2750                 const char* sym;
2751                 if (!code_pages [i] || code_pages [i] & 1)
2752                         continue;
2753                 last_symbol = NULL;
2754                 addr = CPAGE_ADDR (code_pages [i]);
2755                 page_end = addr + CPAGE_SIZE;
2756                 code_pages [i] |= 1;
2757                 /* we dump the symbols for the whole page */
2758                 for (; addr < page_end; addr += 16) {
2759                         sym = symbol_for (addr);
2760                         if (sym && sym == last_symbol)
2761                                 continue;
2762                         last_symbol = sym;
2763                         if (!sym)
2764                                 continue;
2765                         dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2766                         //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2767                 }
2768         }
2769 }
2770
2771 typedef struct MonoCounterAgent {
2772         MonoCounter *counter;
2773         // MonoCounterAgent specific data :
2774         void *value;
2775         size_t value_size;
2776         short index;
2777         short emitted;
2778         struct MonoCounterAgent *next;
2779 } MonoCounterAgent;
2780
2781 static MonoCounterAgent* counters;
2782 static int counters_index = 1;
2783 static mono_mutex_t counters_mutex;
2784
2785 static void
2786 counters_add_agent (MonoCounter *counter)
2787 {
2788         if (InterlockedRead (&in_shutdown))
2789                 return;
2790
2791         MonoCounterAgent *agent, *item;
2792
2793         mono_os_mutex_lock (&counters_mutex);
2794
2795         for (agent = counters; agent; agent = agent->next) {
2796                 if (agent->counter == counter) {
2797                         agent->value_size = 0;
2798                         if (agent->value) {
2799                                 g_free (agent->value);
2800                                 agent->value = NULL;
2801                         }
2802                         goto done;
2803                 }
2804         }
2805
2806         agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2807         agent->counter = counter;
2808         agent->value = NULL;
2809         agent->value_size = 0;
2810         agent->index = counters_index++;
2811         agent->emitted = 0;
2812         agent->next = NULL;
2813
2814         if (!counters) {
2815                 counters = agent;
2816         } else {
2817                 item = counters;
2818                 while (item->next)
2819                         item = item->next;
2820                 item->next = agent;
2821         }
2822
2823 done:
2824         mono_os_mutex_unlock (&counters_mutex);
2825 }
2826
2827 static mono_bool
2828 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2829 {
2830         counters_add_agent (counter);
2831         return TRUE;
2832 }
2833
2834 static void
2835 counters_init (MonoProfiler *profiler)
2836 {
2837         mono_os_mutex_init (&counters_mutex);
2838
2839         mono_counters_on_register (&counters_add_agent);
2840         mono_counters_foreach (counters_init_foreach_callback, NULL);
2841 }
2842
2843 static void
2844 counters_emit (MonoProfiler *profiler)
2845 {
2846         MonoCounterAgent *agent;
2847         int len = 0;
2848         int size =
2849                 EVENT_SIZE /* event */ +
2850                 LEB128_SIZE /* len */
2851         ;
2852
2853         mono_os_mutex_lock (&counters_mutex);
2854
2855         for (agent = counters; agent; agent = agent->next) {
2856                 if (agent->emitted)
2857                         continue;
2858
2859                 size +=
2860                         LEB128_SIZE /* section */ +
2861                         strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2862                         BYTE_SIZE /* type */ +
2863                         BYTE_SIZE /* unit */ +
2864                         BYTE_SIZE /* variance */ +
2865                         LEB128_SIZE /* index */
2866                 ;
2867
2868                 len++;
2869         }
2870
2871         if (!len)
2872                 goto done;
2873
2874         ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2875
2876         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2877         emit_value (logbuffer, len);
2878
2879         for (agent = counters; agent; agent = agent->next) {
2880                 const char *name;
2881
2882                 if (agent->emitted)
2883                         continue;
2884
2885                 name = mono_counter_get_name (agent->counter);
2886                 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2887                 emit_string (logbuffer, name, strlen (name) + 1);
2888                 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2889                 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2890                 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2891                 emit_value (logbuffer, agent->index);
2892
2893                 agent->emitted = 1;
2894         }
2895
2896         EXIT_LOG_EXPLICIT (DO_SEND);
2897
2898 done:
2899         mono_os_mutex_unlock (&counters_mutex);
2900 }
2901
2902 static void
2903 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2904 {
2905         MonoCounterAgent *agent;
2906         MonoCounter *counter;
2907         int type;
2908         int buffer_size;
2909         void *buffer;
2910         int size;
2911
2912         counters_emit (profiler);
2913
2914         buffer_size = 8;
2915         buffer = g_calloc (1, buffer_size);
2916
2917         mono_os_mutex_lock (&counters_mutex);
2918
2919         size =
2920                 EVENT_SIZE /* event */
2921         ;
2922
2923         for (agent = counters; agent; agent = agent->next) {
2924                 size +=
2925                         LEB128_SIZE /* index */ +
2926                         BYTE_SIZE /* type */ +
2927                         mono_counter_get_size (agent->counter) /* value */
2928                 ;
2929         }
2930
2931         size +=
2932                 LEB128_SIZE /* stop marker */
2933         ;
2934
2935         ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2936
2937         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2938
2939         for (agent = counters; agent; agent = agent->next) {
2940                 size_t size;
2941
2942                 counter = agent->counter;
2943
2944                 size = mono_counter_get_size (counter);
2945
2946                 if (size > buffer_size) {
2947                         buffer_size = size;
2948                         buffer = g_realloc (buffer, buffer_size);
2949                 }
2950
2951                 memset (buffer, 0, buffer_size);
2952
2953                 g_assert (mono_counters_sample (counter, buffer, size));
2954
2955                 type = mono_counter_get_type (counter);
2956
2957                 if (!agent->value) {
2958                         agent->value = g_calloc (1, size);
2959                         agent->value_size = size;
2960                 } else {
2961                         if (type == MONO_COUNTER_STRING) {
2962                                 if (strcmp (agent->value, buffer) == 0)
2963                                         continue;
2964                         } else {
2965                                 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2966                                         continue;
2967                         }
2968                 }
2969
2970                 emit_uvalue (logbuffer, agent->index);
2971                 emit_byte (logbuffer, type);
2972                 switch (type) {
2973                 case MONO_COUNTER_INT:
2974 #if SIZEOF_VOID_P == 4
2975                 case MONO_COUNTER_WORD:
2976 #endif
2977                         emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2978                         break;
2979                 case MONO_COUNTER_UINT:
2980                         emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2981                         break;
2982                 case MONO_COUNTER_TIME_INTERVAL:
2983                 case MONO_COUNTER_LONG:
2984 #if SIZEOF_VOID_P == 8
2985                 case MONO_COUNTER_WORD:
2986 #endif
2987                         emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2988                         break;
2989                 case MONO_COUNTER_ULONG:
2990                         emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2991                         break;
2992                 case MONO_COUNTER_DOUBLE:
2993                         emit_double (logbuffer, *(double*)buffer);
2994                         break;
2995                 case MONO_COUNTER_STRING:
2996                         if (size == 0) {
2997                                 emit_byte (logbuffer, 0);
2998                         } else {
2999                                 emit_byte (logbuffer, 1);
3000                                 emit_string (logbuffer, (char*)buffer, size);
3001                         }
3002                         break;
3003                 default:
3004                         g_assert_not_reached ();
3005                 }
3006
3007                 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
3008                         agent->value = g_realloc (agent->value, size);
3009                         agent->value_size = size;
3010                 }
3011
3012                 if (size > 0)
3013                         memcpy (agent->value, buffer, size);
3014         }
3015         g_free (buffer);
3016
3017         emit_value (logbuffer, 0);
3018
3019         EXIT_LOG_EXPLICIT (DO_SEND);
3020
3021         mono_os_mutex_unlock (&counters_mutex);
3022 }
3023
3024 typedef struct _PerfCounterAgent PerfCounterAgent;
3025 struct _PerfCounterAgent {
3026         PerfCounterAgent *next;
3027         int index;
3028         char *category_name;
3029         char *name;
3030         int type;
3031         gint64 value;
3032         guint8 emitted;
3033         guint8 updated;
3034         guint8 deleted;
3035 };
3036
3037 static PerfCounterAgent *perfcounters = NULL;
3038
3039 static void
3040 perfcounters_emit (MonoProfiler *profiler)
3041 {
3042         PerfCounterAgent *pcagent;
3043         int len = 0;
3044         int size =
3045                 EVENT_SIZE /* event */ +
3046                 LEB128_SIZE /* len */
3047         ;
3048
3049         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3050                 if (pcagent->emitted)
3051                         continue;
3052
3053                 size +=
3054                         LEB128_SIZE /* section */ +
3055                         strlen (pcagent->category_name) + 1 /* category name */ +
3056                         strlen (pcagent->name) + 1 /* name */ +
3057                         BYTE_SIZE /* type */ +
3058                         BYTE_SIZE /* unit */ +
3059                         BYTE_SIZE /* variance */ +
3060                         LEB128_SIZE /* index */
3061                 ;
3062
3063                 len++;
3064         }
3065
3066         if (!len)
3067                 return;
3068
3069         ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3070
3071         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3072         emit_value (logbuffer, len);
3073
3074         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3075                 if (pcagent->emitted)
3076                         continue;
3077
3078                 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3079                 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3080                 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3081                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3082                 emit_byte (logbuffer, MONO_COUNTER_RAW);
3083                 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3084                 emit_value (logbuffer, pcagent->index);
3085
3086                 pcagent->emitted = 1;
3087         }
3088
3089         EXIT_LOG_EXPLICIT (DO_SEND);
3090 }
3091
3092 static gboolean
3093 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3094 {
3095         PerfCounterAgent *pcagent;
3096
3097         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3098                 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3099                         continue;
3100                 if (pcagent->value == value)
3101                         return TRUE;
3102
3103                 pcagent->value = value;
3104                 pcagent->updated = 1;
3105                 pcagent->deleted = 0;
3106                 return TRUE;
3107         }
3108
3109         pcagent = g_new0 (PerfCounterAgent, 1);
3110         pcagent->next = perfcounters;
3111         pcagent->index = counters_index++;
3112         pcagent->category_name = g_strdup (category_name);
3113         pcagent->name = g_strdup (name);
3114         pcagent->type = (int) type;
3115         pcagent->value = value;
3116         pcagent->emitted = 0;
3117         pcagent->updated = 1;
3118         pcagent->deleted = 0;
3119
3120         perfcounters = pcagent;
3121
3122         return TRUE;
3123 }
3124
3125 static void
3126 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3127 {
3128         PerfCounterAgent *pcagent;
3129         int len = 0;
3130         int size;
3131
3132         mono_os_mutex_lock (&counters_mutex);
3133
3134         /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3135         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3136                 pcagent->deleted = 1;
3137
3138         mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3139
3140         perfcounters_emit (profiler);
3141
3142         size =
3143                 EVENT_SIZE /* event */
3144         ;
3145
3146         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3147                 if (pcagent->deleted || !pcagent->updated)
3148                         continue;
3149
3150                 size +=
3151                         LEB128_SIZE /* index */ +
3152                         BYTE_SIZE /* type */ +
3153                         LEB128_SIZE /* value */
3154                 ;
3155
3156                 len++;
3157         }
3158
3159         if (!len)
3160                 goto done;
3161
3162         size +=
3163                 LEB128_SIZE /* stop marker */
3164         ;
3165
3166         ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3167
3168         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3169
3170         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3171                 if (pcagent->deleted || !pcagent->updated)
3172                         continue;
3173                 emit_uvalue (logbuffer, pcagent->index);
3174                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3175                 emit_svalue (logbuffer, pcagent->value);
3176
3177                 pcagent->updated = 0;
3178         }
3179
3180         emit_value (logbuffer, 0);
3181
3182         EXIT_LOG_EXPLICIT (DO_SEND);
3183
3184 done:
3185         mono_os_mutex_unlock (&counters_mutex);
3186 }
3187
3188 static void
3189 counters_and_perfcounters_sample (MonoProfiler *prof)
3190 {
3191         uint64_t now = current_time ();
3192
3193         counters_sample (prof, now);
3194         perfcounters_sample (prof, now);
3195 }
3196
3197 #define COVERAGE_DEBUG(x) if (debug_coverage) {x}
3198 static mono_mutex_t coverage_mutex;
3199 static MonoConcurrentHashTable *coverage_methods = NULL;
3200 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3201 static MonoConcurrentHashTable *coverage_classes = NULL;
3202
3203 static MonoConcurrentHashTable *filtered_classes = NULL;
3204 static MonoConcurrentHashTable *entered_methods = NULL;
3205 static MonoConcurrentHashTable *image_to_methods = NULL;
3206 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3207 static gboolean coverage_initialized = FALSE;
3208
3209 static GPtrArray *coverage_data = NULL;
3210 static int previous_offset = 0;
3211
3212 typedef struct {
3213         MonoLockFreeQueueNode node;
3214         MonoMethod *method;
3215 } MethodNode;
3216
3217 typedef struct {
3218         int offset;
3219         int counter;
3220         char *filename;
3221         int line;
3222         int column;
3223 } CoverageEntry;
3224
3225 static void
3226 free_coverage_entry (gpointer data, gpointer userdata)
3227 {
3228         CoverageEntry *entry = (CoverageEntry *)data;
3229         g_free (entry->filename);
3230         g_free (entry);
3231 }
3232
3233 static void
3234 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfileCoverageEntry *entry)
3235 {
3236         int offset = entry->iloffset - previous_offset;
3237         CoverageEntry *e = g_new (CoverageEntry, 1);
3238
3239         previous_offset = entry->iloffset;
3240
3241         e->offset = offset;
3242         e->counter = entry->counter;
3243         e->filename = g_strdup(entry->filename ? entry->filename : "");
3244         e->line = entry->line;
3245         e->column = entry->col;
3246
3247         g_ptr_array_add (coverage_data, e);
3248 }
3249
3250 static char *
3251 parse_generic_type_names(char *name)
3252 {
3253         char *new_name, *ret;
3254         int within_generic_declaration = 0, generic_members = 1;
3255
3256         if (name == NULL || *name == '\0')
3257                 return g_strdup ("");
3258
3259         if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3260                 return NULL;
3261
3262         do {
3263                 switch (*name) {
3264                         case '<':
3265                                 within_generic_declaration = 1;
3266                                 break;
3267
3268                         case '>':
3269                                 within_generic_declaration = 0;
3270
3271                                 if (*(name - 1) != '<') {
3272                                         *new_name++ = '`';
3273                                         *new_name++ = '0' + generic_members;
3274                                 } else {
3275                                         memcpy (new_name, "&lt;&gt;", 8);
3276                                         new_name += 8;
3277                                 }
3278
3279                                 generic_members = 0;
3280                                 break;
3281
3282                         case ',':
3283                                 generic_members++;
3284                                 break;
3285
3286                         default:
3287                                 if (!within_generic_declaration)
3288                                         *new_name++ = *name;
3289
3290                                 break;
3291                 }
3292         } while (*name++);
3293
3294         return ret;
3295 }
3296
3297 static int method_id;
3298 static void
3299 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3300 {
3301         MonoMethod *method = (MonoMethod *)value;
3302         MonoProfiler *prof = (MonoProfiler *)userdata;
3303         MonoClass *klass;
3304         MonoImage *image;
3305         char *class_name;
3306         const char *image_name, *method_name, *sig, *first_filename;
3307         guint i;
3308
3309         previous_offset = 0;
3310         coverage_data = g_ptr_array_new ();
3311
3312         mono_profiler_coverage_get (prof, method, obtain_coverage_for_method);
3313
3314         klass = mono_method_get_class (method);
3315         image = mono_class_get_image (klass);
3316         image_name = mono_image_get_name (image);
3317
3318         sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3319         class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3320         method_name = mono_method_get_name (method);
3321
3322         if (coverage_data->len != 0) {
3323                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3324                 first_filename = entry->filename ? entry->filename : "";
3325         } else
3326                 first_filename = "";
3327
3328         image_name = image_name ? image_name : "";
3329         sig = sig ? sig : "";
3330         method_name = method_name ? method_name : "";
3331
3332         ENTER_LOG (&coverage_methods_ctr, logbuffer,
3333                 EVENT_SIZE /* event */ +
3334                 strlen (image_name) + 1 /* image name */ +
3335                 strlen (class_name) + 1 /* class name */ +
3336                 strlen (method_name) + 1 /* method name */ +
3337                 strlen (sig) + 1 /* signature */ +
3338                 strlen (first_filename) + 1 /* first file name */ +
3339                 LEB128_SIZE /* token */ +
3340                 LEB128_SIZE /* method id */ +
3341                 LEB128_SIZE /* entries */
3342         );
3343
3344         emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3345         emit_string (logbuffer, image_name, strlen (image_name) + 1);
3346         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3347         emit_string (logbuffer, method_name, strlen (method_name) + 1);
3348         emit_string (logbuffer, sig, strlen (sig) + 1);
3349         emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3350
3351         emit_uvalue (logbuffer, mono_method_get_token (method));
3352         emit_uvalue (logbuffer, method_id);
3353         emit_value (logbuffer, coverage_data->len);
3354
3355         EXIT_LOG_EXPLICIT (DO_SEND);
3356
3357         for (i = 0; i < coverage_data->len; i++) {
3358                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3359
3360                 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3361                         EVENT_SIZE /* event */ +
3362                         LEB128_SIZE /* method id */ +
3363                         LEB128_SIZE /* offset */ +
3364                         LEB128_SIZE /* counter */ +
3365                         LEB128_SIZE /* line */ +
3366                         LEB128_SIZE /* column */
3367                 );
3368
3369                 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3370                 emit_uvalue (logbuffer, method_id);
3371                 emit_uvalue (logbuffer, entry->offset);
3372                 emit_uvalue (logbuffer, entry->counter);
3373                 emit_uvalue (logbuffer, entry->line);
3374                 emit_uvalue (logbuffer, entry->column);
3375
3376                 EXIT_LOG_EXPLICIT (DO_SEND);
3377         }
3378
3379         method_id++;
3380
3381         g_free (class_name);
3382
3383         g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3384         g_ptr_array_free (coverage_data, TRUE);
3385         coverage_data = NULL;
3386 }
3387
3388 /* This empties the queue */
3389 static guint
3390 count_queue (MonoLockFreeQueue *queue)
3391 {
3392         MonoLockFreeQueueNode *node;
3393         guint count = 0;
3394
3395         while ((node = mono_lock_free_queue_dequeue (queue))) {
3396                 count++;
3397                 mono_thread_hazardous_try_free (node, g_free);
3398         }
3399
3400         return count;
3401 }
3402
3403 static void
3404 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3405 {
3406         MonoClass *klass = (MonoClass *)key;
3407         MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3408         MonoImage *image;
3409         char *class_name;
3410         const char *assembly_name;
3411         int number_of_methods, partially_covered;
3412         guint fully_covered;
3413
3414         image = mono_class_get_image (klass);
3415         assembly_name = mono_image_get_name (image);
3416         class_name = mono_type_get_name (mono_class_get_type (klass));
3417
3418         assembly_name = assembly_name ? assembly_name : "";
3419         number_of_methods = mono_class_num_methods (klass);
3420         fully_covered = count_queue (class_methods);
3421         /* We don't handle partial covered yet */
3422         partially_covered = 0;
3423
3424         ENTER_LOG (&coverage_classes_ctr, logbuffer,
3425                 EVENT_SIZE /* event */ +
3426                 strlen (assembly_name) + 1 /* assembly name */ +
3427                 strlen (class_name) + 1 /* class name */ +
3428                 LEB128_SIZE /* no. methods */ +
3429                 LEB128_SIZE /* fully covered */ +
3430                 LEB128_SIZE /* partially covered */
3431         );
3432
3433         emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3434         emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3435         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3436         emit_uvalue (logbuffer, number_of_methods);
3437         emit_uvalue (logbuffer, fully_covered);
3438         emit_uvalue (logbuffer, partially_covered);
3439
3440         EXIT_LOG_EXPLICIT (DO_SEND);
3441
3442         g_free (class_name);
3443 }
3444
3445 static void
3446 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3447 {
3448         MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3449
3450         *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3451         if (image_methods)
3452                 *fully_covered = count_queue (image_methods);
3453         else
3454                 *fully_covered = 0;
3455
3456         // FIXME: We don't handle partially covered yet.
3457         *partially_covered = 0;
3458 }
3459
3460 static void
3461 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3462 {
3463         MonoAssembly *assembly = (MonoAssembly *)value;
3464         MonoImage *image = mono_assembly_get_image (assembly);
3465         const char *name, *guid, *filename;
3466         int number_of_methods = 0, partially_covered = 0;
3467         guint fully_covered = 0;
3468
3469         name = mono_image_get_name (image);
3470         guid = mono_image_get_guid (image);
3471         filename = mono_image_get_filename (image);
3472
3473         name = name ? name : "";
3474         guid = guid ? guid : "";
3475         filename = filename ? filename : "";
3476
3477         get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3478
3479         ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3480                 EVENT_SIZE /* event */ +
3481                 strlen (name) + 1 /* name */ +
3482                 strlen (guid) + 1 /* guid */ +
3483                 strlen (filename) + 1 /* file name */ +
3484                 LEB128_SIZE /* no. methods */ +
3485                 LEB128_SIZE /* fully covered */ +
3486                 LEB128_SIZE /* partially covered */
3487         );
3488
3489         emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3490         emit_string (logbuffer, name, strlen (name) + 1);
3491         emit_string (logbuffer, guid, strlen (guid) + 1);
3492         emit_string (logbuffer, filename, strlen (filename) + 1);
3493         emit_uvalue (logbuffer, number_of_methods);
3494         emit_uvalue (logbuffer, fully_covered);
3495         emit_uvalue (logbuffer, partially_covered);
3496
3497         EXIT_LOG_EXPLICIT (DO_SEND);
3498 }
3499
3500 static void
3501 dump_coverage (MonoProfiler *prof)
3502 {
3503         if (!coverage_initialized)
3504                 return;
3505
3506         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Started dump\n");)
3507         method_id = 0;
3508
3509         mono_os_mutex_lock (&coverage_mutex);
3510         mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3511         mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3512         mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3513         mono_os_mutex_unlock (&coverage_mutex);
3514
3515         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Finished dump\n");)
3516 }
3517
3518 static void
3519 process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method)
3520 {
3521         MonoClass *klass;
3522         MonoImage *image;
3523
3524         if (!coverage_initialized)
3525                 return;
3526
3527         klass = mono_method_get_class (method);
3528         image = mono_class_get_image (klass);
3529
3530         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)))
3531                 return;
3532
3533         mono_os_mutex_lock (&coverage_mutex);
3534         mono_conc_hashtable_insert (entered_methods, method, method);
3535         mono_os_mutex_unlock (&coverage_mutex);
3536 }
3537
3538 static MonoLockFreeQueueNode *
3539 create_method_node (MonoMethod *method)
3540 {
3541         MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3542         mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3543         node->method = method;
3544
3545         return (MonoLockFreeQueueNode *) node;
3546 }
3547
3548 static gboolean
3549 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3550 {
3551         MonoError error;
3552         MonoClass *klass;
3553         MonoImage *image;
3554         MonoAssembly *assembly;
3555         MonoMethodHeader *header;
3556         guint32 iflags, flags, code_size;
3557         char *fqn, *classname;
3558         gboolean has_positive, found;
3559         MonoLockFreeQueue *image_methods, *class_methods;
3560         MonoLockFreeQueueNode *node;
3561
3562         g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3563
3564         COVERAGE_DEBUG(fprintf (stderr, "Coverage filter for %s\n", mono_method_get_name (method));)
3565
3566         flags = mono_method_get_flags (method, &iflags);
3567         if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3568             (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/)) {
3569                 COVERAGE_DEBUG(fprintf (stderr, "   Internal call or pinvoke - ignoring\n");)
3570                 return FALSE;
3571         }
3572
3573         // Don't need to do anything else if we're already tracking this method
3574         if (mono_conc_hashtable_lookup (coverage_methods, method)) {
3575                 COVERAGE_DEBUG(fprintf (stderr, "   Already tracking\n");)
3576                 return TRUE;
3577         }
3578
3579         klass = mono_method_get_class (method);
3580         image = mono_class_get_image (klass);
3581
3582         // Don't handle coverage for the core assemblies
3583         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3584                 return FALSE;
3585
3586         if (prof->coverage_filters) {
3587                 /* Check already filtered classes first */
3588                 if (mono_conc_hashtable_lookup (filtered_classes, klass)) {
3589                         COVERAGE_DEBUG(fprintf (stderr, "   Already filtered\n");)
3590                         return FALSE;
3591                 }
3592
3593                 classname = mono_type_get_name (mono_class_get_type (klass));
3594
3595                 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3596
3597                 COVERAGE_DEBUG(fprintf (stderr, "   Looking for %s in filter\n", fqn);)
3598                 // Check positive filters first
3599                 has_positive = FALSE;
3600                 found = FALSE;
3601                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3602                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3603
3604                         if (filter [0] == '+') {
3605                                 filter = &filter [1];
3606
3607                                 COVERAGE_DEBUG(fprintf (stderr, "   Checking against +%s ...", filter);)
3608
3609                                 if (strstr (fqn, filter) != NULL) {
3610                                         COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3611                                         found = TRUE;
3612                                 } else
3613                                         COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3614
3615                                 has_positive = TRUE;
3616                         }
3617                 }
3618
3619                 if (has_positive && !found) {
3620                         COVERAGE_DEBUG(fprintf (stderr, "   Positive match was not found\n");)
3621
3622                         mono_os_mutex_lock (&coverage_mutex);
3623                         mono_conc_hashtable_insert (filtered_classes, klass, klass);
3624                         mono_os_mutex_unlock (&coverage_mutex);
3625                         g_free (fqn);
3626                         g_free (classname);
3627
3628                         return FALSE;
3629                 }
3630
3631                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3632                         // FIXME: Is substring search sufficient?
3633                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3634                         if (filter [0] == '+')
3635                                 continue;
3636
3637                         // Skip '-'
3638                         filter = &filter [1];
3639                         COVERAGE_DEBUG(fprintf (stderr, "   Checking against -%s ...", filter);)
3640
3641                         if (strstr (fqn, filter) != NULL) {
3642                                 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3643
3644                                 mono_os_mutex_lock (&coverage_mutex);
3645                                 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3646                                 mono_os_mutex_unlock (&coverage_mutex);
3647                                 g_free (fqn);
3648                                 g_free (classname);
3649
3650                                 return FALSE;
3651                         } else
3652                                 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3653
3654                 }
3655
3656                 g_free (fqn);
3657                 g_free (classname);
3658         }
3659
3660         COVERAGE_DEBUG(fprintf (stderr, "   Handling coverage for %s\n", mono_method_get_name (method));)
3661         header = mono_method_get_header_checked (method, &error);
3662         mono_error_cleanup (&error);
3663
3664         mono_method_header_get_code (header, &code_size, NULL);
3665
3666         assembly = mono_image_get_assembly (image);
3667
3668         // Need to keep the assemblies around for as long as they are kept in the hashtable
3669         // Nunit, for example, has a habit of unloading them before the coverage statistics are
3670         // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3671         mono_assembly_addref (assembly);
3672
3673         mono_os_mutex_lock (&coverage_mutex);
3674         mono_conc_hashtable_insert (coverage_methods, method, method);
3675         mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3676         mono_os_mutex_unlock (&coverage_mutex);
3677
3678         image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3679
3680         if (image_methods == NULL) {
3681                 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3682                 mono_lock_free_queue_init (image_methods);
3683                 mono_os_mutex_lock (&coverage_mutex);
3684                 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3685                 mono_os_mutex_unlock (&coverage_mutex);
3686         }
3687
3688         node = create_method_node (method);
3689         mono_lock_free_queue_enqueue (image_methods, node);
3690
3691         class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3692
3693         if (class_methods == NULL) {
3694                 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3695                 mono_lock_free_queue_init (class_methods);
3696                 mono_os_mutex_lock (&coverage_mutex);
3697                 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3698                 mono_os_mutex_unlock (&coverage_mutex);
3699         }
3700
3701         node = create_method_node (method);
3702         mono_lock_free_queue_enqueue (class_methods, node);
3703
3704         return TRUE;
3705 }
3706
3707 #define LINE_BUFFER_SIZE 4096
3708 /* Max file limit of 128KB */
3709 #define MAX_FILE_SIZE 128 * 1024
3710 static char *
3711 get_file_content (FILE *stream)
3712 {
3713         char *buffer;
3714         ssize_t bytes_read;
3715         long filesize;
3716         int res, offset = 0;
3717
3718         res = fseek (stream, 0, SEEK_END);
3719         if (res < 0)
3720           return NULL;
3721
3722         filesize = ftell (stream);
3723         if (filesize < 0)
3724           return NULL;
3725
3726         res = fseek (stream, 0, SEEK_SET);
3727         if (res < 0)
3728           return NULL;
3729
3730         if (filesize > MAX_FILE_SIZE)
3731           return NULL;
3732
3733         buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3734         while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3735                 offset += bytes_read;
3736
3737         /* NULL terminate our buffer */
3738         buffer[filesize] = '\0';
3739         return buffer;
3740 }
3741
3742 static char *
3743 get_next_line (char *contents, char **next_start)
3744 {
3745         char *p = contents;
3746
3747         if (p == NULL || *p == '\0') {
3748                 *next_start = NULL;
3749                 return NULL;
3750         }
3751
3752         while (*p != '\n' && *p != '\0')
3753                 p++;
3754
3755         if (*p == '\n') {
3756                 *p = '\0';
3757                 *next_start = p + 1;
3758         } else
3759                 *next_start = NULL;
3760
3761         return contents;
3762 }
3763
3764 static void
3765 init_suppressed_assemblies (void)
3766 {
3767         char *content;
3768         char *line;
3769         FILE *sa_file;
3770
3771         suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3772         sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3773         if (sa_file == NULL)
3774                 return;
3775
3776         /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3777         content = get_file_content (sa_file);
3778         if (content == NULL) {
3779                 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3780         }
3781
3782         while ((line = get_next_line (content, &content))) {
3783                 line = g_strchomp (g_strchug (line));
3784                 /* No locking needed as we're doing initialization */
3785                 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3786         }
3787
3788         fclose (sa_file);
3789 }
3790
3791 static void
3792 parse_cov_filter_file (GPtrArray *filters, const char *file)
3793 {
3794         FILE *filter_file;
3795         char *line, *content;
3796
3797         filter_file = fopen (file, "r");
3798         if (filter_file == NULL) {
3799                 fprintf (stderr, "Unable to open %s\n", file);
3800                 return;
3801         }
3802
3803         /* Don't need to free content as it is referred to by the lines stored in @filters */
3804         content = get_file_content (filter_file);
3805         if (content == NULL)
3806                 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3807
3808         while ((line = get_next_line (content, &content)))
3809                 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3810
3811         fclose (filter_file);
3812 }
3813
3814 static void
3815 coverage_init (MonoProfiler *prof)
3816 {
3817         g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3818
3819         COVERAGE_DEBUG(fprintf (stderr, "Coverage initialized\n");)
3820
3821         mono_os_mutex_init (&coverage_mutex);
3822         coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3823         coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3824         coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3825         filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3826         entered_methods = mono_conc_hashtable_new (NULL, NULL);
3827         image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3828         init_suppressed_assemblies ();
3829
3830         coverage_initialized = TRUE;
3831 }
3832
3833 static void
3834 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3835 {
3836         MonoAssembly *assembly = (MonoAssembly *)value;
3837         mono_assembly_close (assembly);
3838 }
3839
3840 static void
3841 free_sample_hit (gpointer p)
3842 {
3843         mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3844 }
3845
3846 static void
3847 cleanup_reusable_samples (MonoProfiler *prof)
3848 {
3849         SampleHit *sample;
3850
3851         while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3852                 mono_thread_hazardous_try_free (sample, free_sample_hit);
3853 }
3854
3855 static void
3856 log_shutdown (MonoProfiler *prof)
3857 {
3858         InterlockedWrite (&in_shutdown, 1);
3859
3860         if (!no_counters)
3861                 counters_and_perfcounters_sample (prof);
3862
3863         dump_coverage (prof);
3864
3865         char c = 1;
3866
3867         if (write (prof->pipes [1], &c, 1) != 1) {
3868                 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3869                 exit (1);
3870         }
3871
3872         mono_native_thread_join (prof->helper_thread);
3873
3874         mono_os_mutex_destroy (&counters_mutex);
3875
3876         MonoCounterAgent *mc_next;
3877
3878         for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3879                 mc_next = cur->next;
3880                 g_free (cur);
3881         }
3882
3883         PerfCounterAgent *pc_next;
3884
3885         for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3886                 pc_next = cur->next;
3887                 g_free (cur);
3888         }
3889
3890         /*
3891          * Ensure that we empty the LLS completely, even if some nodes are
3892          * not immediately removed upon calling mono_lls_remove (), by
3893          * iterating until the head is NULL.
3894          */
3895         while (profiler_thread_list.head) {
3896                 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3897                         g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3898
3899                         remove_thread (thread);
3900                 } MONO_LLS_FOREACH_SAFE_END
3901         }
3902
3903         /*
3904          * Ensure that all threads have been freed, so that we don't miss any
3905          * buffers when we shut down the writer thread below.
3906          */
3907         mono_thread_hazardous_try_free_all ();
3908
3909         InterlockedWrite (&prof->run_dumper_thread, 0);
3910         mono_os_sem_post (&prof->dumper_queue_sem);
3911         mono_native_thread_join (prof->dumper_thread);
3912         mono_os_sem_destroy (&prof->dumper_queue_sem);
3913
3914         InterlockedWrite (&prof->run_writer_thread, 0);
3915         mono_os_sem_post (&prof->writer_queue_sem);
3916         mono_native_thread_join (prof->writer_thread);
3917         mono_os_sem_destroy (&prof->writer_queue_sem);
3918
3919         /*
3920          * Free all writer queue entries, and ensure that all sample hits will be
3921          * added to the sample reuse queue.
3922          */
3923         mono_thread_hazardous_try_free_all ();
3924
3925         cleanup_reusable_samples (prof);
3926
3927         /*
3928          * Finally, make sure that all sample hits are freed. This should cover all
3929          * hazardous data from the profiler. We can now be sure that the runtime
3930          * won't later invoke free functions in the profiler library after it has
3931          * been unloaded.
3932          */
3933         mono_thread_hazardous_try_free_all ();
3934
3935         gint32 state = InterlockedRead (&buffer_lock_state);
3936
3937         g_assert (!(state & 0xFFFF) && "Why is the reader count still non-zero?");
3938         g_assert (!(state >> 16) && "Why is the exclusive lock still held?");
3939
3940 #if defined (HAVE_SYS_ZLIB)
3941         if (prof->gzfile)
3942                 gzclose (prof->gzfile);
3943 #endif
3944         if (prof->pipe_output)
3945                 pclose (prof->file);
3946         else
3947                 fclose (prof->file);
3948
3949         mono_conc_hashtable_destroy (prof->method_table);
3950         mono_os_mutex_destroy (&prof->method_table_mutex);
3951
3952         if (coverage_initialized) {
3953                 mono_os_mutex_lock (&coverage_mutex);
3954                 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3955                 mono_os_mutex_unlock (&coverage_mutex);
3956
3957                 mono_conc_hashtable_destroy (coverage_methods);
3958                 mono_conc_hashtable_destroy (coverage_assemblies);
3959                 mono_conc_hashtable_destroy (coverage_classes);
3960                 mono_conc_hashtable_destroy (filtered_classes);
3961
3962                 mono_conc_hashtable_destroy (entered_methods);
3963                 mono_conc_hashtable_destroy (image_to_methods);
3964                 mono_conc_hashtable_destroy (suppressed_assemblies);
3965                 mono_os_mutex_destroy (&coverage_mutex);
3966         }
3967
3968         PROF_TLS_FREE ();
3969
3970         g_free (prof->args);
3971         g_free (prof);
3972 }
3973
3974 static char*
3975 new_filename (const char* filename)
3976 {
3977         time_t t = time (NULL);
3978         int pid = process_id ();
3979         char pid_buf [16];
3980         char time_buf [16];
3981         char *res, *d;
3982         const char *p;
3983         int count_dates = 0;
3984         int count_pids = 0;
3985         int s_date, s_pid;
3986         struct tm *ts;
3987         for (p = filename; *p; p++) {
3988                 if (*p != '%')
3989                         continue;
3990                 p++;
3991                 if (*p == 't')
3992                         count_dates++;
3993                 else if (*p == 'p')
3994                         count_pids++;
3995                 else if (*p == 0)
3996                         break;
3997         }
3998         if (!count_dates && !count_pids)
3999                 return pstrdup (filename);
4000         snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
4001         ts = gmtime (&t);
4002         snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
4003                 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
4004         s_date = strlen (time_buf);
4005         s_pid = strlen (pid_buf);
4006         d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
4007         for (p = filename; *p; p++) {
4008                 if (*p != '%') {
4009                         *d++ = *p;
4010                         continue;
4011                 }
4012                 p++;
4013                 if (*p == 't') {
4014                         strcpy (d, time_buf);
4015                         d += s_date;
4016                         continue;
4017                 } else if (*p == 'p') {
4018                         strcpy (d, pid_buf);
4019                         d += s_pid;
4020                         continue;
4021                 } else if (*p == '%') {
4022                         *d++ = '%';
4023                         continue;
4024                 } else if (*p == 0)
4025                         break;
4026                 *d++ = '%';
4027                 *d++ = *p;
4028         }
4029         *d = 0;
4030         return res;
4031 }
4032
4033 static void
4034 add_to_fd_set (fd_set *set, int fd, int *max_fd)
4035 {
4036         /*
4037          * This should only trigger for the basic FDs (server socket, pipes) at
4038          * startup if for some mysterious reason they're too large. In this case,
4039          * the profiler really can't function, and we're better off printing an
4040          * error and exiting.
4041          */
4042         if (fd >= FD_SETSIZE) {
4043                 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4044                 exit (1);
4045         }
4046
4047         FD_SET (fd, set);
4048
4049         if (*max_fd < fd)
4050                 *max_fd = fd;
4051 }
4052
4053 static void *
4054 helper_thread (void *arg)
4055 {
4056         MonoProfiler *prof = (MonoProfiler *) arg;
4057
4058         mono_threads_attach_tools_thread ();
4059         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4060
4061         MonoProfilerThread *thread = init_thread (prof, FALSE);
4062
4063         GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4064
4065         while (1) {
4066                 fd_set rfds;
4067                 int max_fd = -1;
4068
4069                 FD_ZERO (&rfds);
4070
4071                 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4072                 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4073
4074                 for (gint i = 0; i < command_sockets->len; i++)
4075                         add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4076
4077                 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4078
4079                 // Sleep for 1sec or until a file descriptor has data.
4080                 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4081                         if (errno == EINTR)
4082                                 continue;
4083
4084                         fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4085                         exit (1);
4086                 }
4087
4088                 if (!no_counters)
4089                         counters_and_perfcounters_sample (prof);
4090
4091                 buffer_lock_excl ();
4092
4093                 sync_point (SYNC_POINT_PERIODIC);
4094
4095                 buffer_unlock_excl ();
4096
4097                 // Are we shutting down?
4098                 if (FD_ISSET (prof->pipes [0], &rfds)) {
4099                         char c;
4100                         read (prof->pipes [0], &c, 1);
4101                         break;
4102                 }
4103
4104                 for (gint i = 0; i < command_sockets->len; i++) {
4105                         int fd = g_array_index (command_sockets, int, i);
4106
4107                         if (!FD_ISSET (fd, &rfds))
4108                                 continue;
4109
4110                         char buf [64];
4111                         int len = read (fd, buf, sizeof (buf) - 1);
4112
4113                         if (len == -1)
4114                                 continue;
4115
4116                         if (!len) {
4117                                 // The other end disconnected.
4118                                 g_array_remove_index (command_sockets, i);
4119                                 close (fd);
4120
4121                                 continue;
4122                         }
4123
4124                         buf [len] = 0;
4125
4126                         if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4127                                 // Rely on the finalization callback triggering a GC.
4128                                 heapshot_requested = 1;
4129                                 mono_gc_finalize_notify ();
4130                         }
4131                 }
4132
4133                 if (FD_ISSET (prof->server_socket, &rfds)) {
4134                         int fd = accept (prof->server_socket, NULL, NULL);
4135
4136                         if (fd != -1) {
4137                                 if (fd >= FD_SETSIZE)
4138                                         close (fd);
4139                                 else
4140                                         g_array_append_val (command_sockets, fd);
4141                         }
4142                 }
4143         }
4144
4145         for (gint i = 0; i < command_sockets->len; i++)
4146                 close (g_array_index (command_sockets, int, i));
4147
4148         g_array_free (command_sockets, TRUE);
4149
4150         send_log_unsafe (FALSE);
4151         deinit_thread (thread);
4152
4153         mono_thread_info_detach ();
4154
4155         return NULL;
4156 }
4157
4158 static void
4159 start_helper_thread (MonoProfiler* prof)
4160 {
4161         if (pipe (prof->pipes) == -1) {
4162                 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4163                 exit (1);
4164         }
4165
4166         prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4167
4168         if (prof->server_socket == -1) {
4169                 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4170                 exit (1);
4171         }
4172
4173         struct sockaddr_in server_address;
4174
4175         memset (&server_address, 0, sizeof (server_address));
4176         server_address.sin_family = AF_INET;
4177         server_address.sin_addr.s_addr = INADDR_ANY;
4178         server_address.sin_port = htons (prof->command_port);
4179
4180         if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4181                 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4182                 close (prof->server_socket);
4183                 exit (1);
4184         }
4185
4186         if (listen (prof->server_socket, 1) == -1) {
4187                 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4188                 close (prof->server_socket);
4189                 exit (1);
4190         }
4191
4192         socklen_t slen = sizeof (server_address);
4193
4194         if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4195                 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4196                 close (prof->server_socket);
4197                 exit (1);
4198         }
4199
4200         prof->command_port = ntohs (server_address.sin_port);
4201
4202         if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4203                 fprintf (stderr, "Could not start helper thread\n");
4204                 close (prof->server_socket);
4205                 exit (1);
4206         }
4207 }
4208
4209 static void
4210 free_writer_entry (gpointer p)
4211 {
4212         mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4213 }
4214
4215 static gboolean
4216 handle_writer_queue_entry (MonoProfiler *prof)
4217 {
4218         WriterQueueEntry *entry;
4219
4220         if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4221                 if (!entry->methods)
4222                         goto no_methods;
4223
4224                 gboolean wrote_methods = FALSE;
4225
4226                 /*
4227                  * Encode the method events in a temporary log buffer that we
4228                  * flush to disk before the main buffer, ensuring that all
4229                  * methods have metadata emitted before they're referenced.
4230                  *
4231                  * We use a 'proper' thread-local buffer for this as opposed
4232                  * to allocating and freeing a buffer by hand because the call
4233                  * to mono_method_full_name () below may trigger class load
4234                  * events when it retrieves the signature of the method. So a
4235                  * thread-local buffer needs to exist when such events occur.
4236                  */
4237                 for (guint i = 0; i < entry->methods->len; i++) {
4238                         MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4239
4240                         if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4241                                 goto free_info; // This method already has metadata emitted.
4242
4243                         /*
4244                          * Other threads use this hash table to get a general
4245                          * idea of whether a method has already been emitted to
4246                          * the stream. Due to the way we add to this table, it
4247                          * can easily happen that multiple threads queue up the
4248                          * same methods, but that's OK since eventually all
4249                          * methods will be in this table and the thread-local
4250                          * method lists will just be empty for the rest of the
4251                          * app's lifetime.
4252                          */
4253                         mono_os_mutex_lock (&prof->method_table_mutex);
4254                         mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4255                         mono_os_mutex_unlock (&prof->method_table_mutex);
4256
4257                         char *name = mono_method_full_name (info->method, 1);
4258                         int nlen = strlen (name) + 1;
4259                         void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4260                         int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4261
4262                         ENTER_LOG (&method_jits_ctr, logbuffer,
4263                                 EVENT_SIZE /* event */ +
4264                                 LEB128_SIZE /* method */ +
4265                                 LEB128_SIZE /* start */ +
4266                                 LEB128_SIZE /* size */ +
4267                                 nlen /* name */
4268                         );
4269
4270                         emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4271                         emit_method_inner (logbuffer, info->method);
4272                         emit_ptr (logbuffer, cstart);
4273                         emit_value (logbuffer, csize);
4274
4275                         memcpy (logbuffer->cursor, name, nlen);
4276                         logbuffer->cursor += nlen;
4277
4278                         EXIT_LOG_EXPLICIT (NO_SEND);
4279
4280                         mono_free (name);
4281
4282                         wrote_methods = TRUE;
4283
4284                 free_info:
4285                         g_free (info);
4286                 }
4287
4288                 g_ptr_array_free (entry->methods, TRUE);
4289
4290                 if (wrote_methods) {
4291                         MonoProfilerThread *thread = PROF_TLS_GET ();
4292
4293                         dump_buffer_threadless (prof, thread->buffer);
4294                         init_buffer_state (thread);
4295                 }
4296
4297         no_methods:
4298                 dump_buffer (prof, entry->buffer);
4299
4300                 mono_thread_hazardous_try_free (entry, free_writer_entry);
4301
4302                 return TRUE;
4303         }
4304
4305         return FALSE;
4306 }
4307
4308 static void *
4309 writer_thread (void *arg)
4310 {
4311         MonoProfiler *prof = (MonoProfiler *)arg;
4312
4313         mono_threads_attach_tools_thread ();
4314         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4315
4316         dump_header (prof);
4317
4318         MonoProfilerThread *thread = init_thread (prof, FALSE);
4319
4320         while (InterlockedRead (&prof->run_writer_thread)) {
4321                 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4322                 handle_writer_queue_entry (prof);
4323         }
4324
4325         /* Drain any remaining entries on shutdown. */
4326         while (handle_writer_queue_entry (prof));
4327
4328         free_buffer (thread->buffer, thread->buffer->size);
4329         deinit_thread (thread);
4330
4331         mono_thread_info_detach ();
4332
4333         return NULL;
4334 }
4335
4336 static void
4337 start_writer_thread (MonoProfiler* prof)
4338 {
4339         InterlockedWrite (&prof->run_writer_thread, 1);
4340
4341         if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4342                 fprintf (stderr, "Could not start writer thread\n");
4343                 exit (1);
4344         }
4345 }
4346
4347 static void
4348 reuse_sample_hit (gpointer p)
4349 {
4350         SampleHit *sample = p;
4351
4352         mono_lock_free_queue_node_unpoison (&sample->node);
4353         mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4354 }
4355
4356 static gboolean
4357 handle_dumper_queue_entry (MonoProfiler *prof)
4358 {
4359         SampleHit *sample;
4360
4361         if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4362                 for (int i = 0; i < sample->count; ++i) {
4363                         MonoMethod *method = sample->frames [i].method;
4364                         MonoDomain *domain = sample->frames [i].domain;
4365                         void *address = sample->frames [i].base_address;
4366
4367                         if (!method) {
4368                                 g_assert (domain && "What happened to the domain pointer?");
4369                                 g_assert (address && "What happened to the instruction pointer?");
4370
4371                                 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4372
4373                                 if (ji)
4374                                         sample->frames [i].method = mono_jit_info_get_method (ji);
4375                         }
4376                 }
4377
4378                 ENTER_LOG (&sample_hits_ctr, logbuffer,
4379                         EVENT_SIZE /* event */ +
4380                         BYTE_SIZE /* type */ +
4381                         LEB128_SIZE /* tid */ +
4382                         LEB128_SIZE /* count */ +
4383                         1 * (
4384                                 LEB128_SIZE /* ip */
4385                         ) +
4386                         LEB128_SIZE /* managed count */ +
4387                         sample->count * (
4388                                 LEB128_SIZE /* method */
4389                         )
4390                 );
4391
4392                 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4393                 emit_byte (logbuffer, SAMPLE_CYCLES);
4394                 emit_ptr (logbuffer, (void *) sample->tid);
4395                 emit_value (logbuffer, 1);
4396
4397                 // TODO: Actual native unwinding.
4398                 for (int i = 0; i < 1; ++i) {
4399                         emit_ptr (logbuffer, sample->ip);
4400                         add_code_pointer ((uintptr_t) sample->ip);
4401                 }
4402
4403                 /* new in data version 6 */
4404                 emit_uvalue (logbuffer, sample->count);
4405
4406                 for (int i = 0; i < sample->count; ++i)
4407                         emit_method (logbuffer, sample->frames [i].method);
4408
4409                 EXIT_LOG_EXPLICIT (DO_SEND);
4410
4411                 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4412
4413                 dump_unmanaged_coderefs (prof);
4414         }
4415
4416         return FALSE;
4417 }
4418
4419 static void *
4420 dumper_thread (void *arg)
4421 {
4422         MonoProfiler *prof = (MonoProfiler *)arg;
4423
4424         mono_threads_attach_tools_thread ();
4425         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4426
4427         MonoProfilerThread *thread = init_thread (prof, FALSE);
4428
4429         while (InterlockedRead (&prof->run_dumper_thread)) {
4430                 /*
4431                  * Flush samples every second so it doesn't seem like the profiler is
4432                  * not working if the program is mostly idle.
4433                  */
4434                 if (mono_os_sem_timedwait (&prof->dumper_queue_sem, 1000, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_TIMEDOUT)
4435                         send_log_unsafe (FALSE);
4436
4437                 handle_dumper_queue_entry (prof);
4438         }
4439
4440         /* Drain any remaining entries on shutdown. */
4441         while (handle_dumper_queue_entry (prof));
4442
4443         send_log_unsafe (FALSE);
4444         deinit_thread (thread);
4445
4446         mono_thread_info_detach ();
4447
4448         return NULL;
4449 }
4450
4451 static void
4452 start_dumper_thread (MonoProfiler* prof)
4453 {
4454         InterlockedWrite (&prof->run_dumper_thread, 1);
4455
4456         if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4457                 fprintf (stderr, "Could not start dumper thread\n");
4458                 exit (1);
4459         }
4460 }
4461
4462 static void
4463 register_counter (const char *name, gint32 *counter)
4464 {
4465         mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4466 }
4467
4468 static void
4469 runtime_initialized (MonoProfiler *profiler)
4470 {
4471         InterlockedWrite (&runtime_inited, 1);
4472
4473         register_counter ("Sample events allocated", &sample_allocations_ctr);
4474         register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4475
4476         register_counter ("Event: Sync points", &sync_points_ctr);
4477         register_counter ("Event: Heap objects", &heap_objects_ctr);
4478         register_counter ("Event: Heap starts", &heap_starts_ctr);
4479         register_counter ("Event: Heap ends", &heap_ends_ctr);
4480         register_counter ("Event: Heap roots", &heap_roots_ctr);
4481         register_counter ("Event: GC events", &gc_events_ctr);
4482         register_counter ("Event: GC resizes", &gc_resizes_ctr);
4483         register_counter ("Event: GC allocations", &gc_allocs_ctr);
4484         register_counter ("Event: GC moves", &gc_moves_ctr);
4485         register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4486         register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4487         register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4488         register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4489         register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4490         register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4491         register_counter ("Event: Image loads", &image_loads_ctr);
4492         register_counter ("Event: Image unloads", &image_unloads_ctr);
4493         register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4494         register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4495         register_counter ("Event: Class loads", &class_loads_ctr);
4496         register_counter ("Event: Class unloads", &class_unloads_ctr);
4497         register_counter ("Event: Method entries", &method_entries_ctr);
4498         register_counter ("Event: Method exits", &method_exits_ctr);
4499         register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4500         register_counter ("Event: Method JITs", &method_jits_ctr);
4501         register_counter ("Event: Code buffers", &code_buffers_ctr);
4502         register_counter ("Event: Exception throws", &exception_throws_ctr);
4503         register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4504         register_counter ("Event: Monitor events", &monitor_events_ctr);
4505         register_counter ("Event: Thread starts", &thread_starts_ctr);
4506         register_counter ("Event: Thread ends", &thread_ends_ctr);
4507         register_counter ("Event: Thread names", &thread_names_ctr);
4508         register_counter ("Event: Domain loads", &domain_loads_ctr);
4509         register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4510         register_counter ("Event: Domain names", &domain_names_ctr);
4511         register_counter ("Event: Context loads", &context_loads_ctr);
4512         register_counter ("Event: Context unloads", &context_unloads_ctr);
4513         register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4514         register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4515         register_counter ("Event: Sample hits", &sample_hits_ctr);
4516         register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4517         register_counter ("Event: Counter samples", &counter_samples_ctr);
4518         register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4519         register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4520         register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4521         register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4522         register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4523         register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4524
4525         counters_init (profiler);
4526
4527         /*
4528          * We must start the helper thread before the writer thread. This is
4529          * because the helper thread sets up the command port which is written to
4530          * the log header by the writer thread.
4531          */
4532         start_helper_thread (profiler);
4533         start_writer_thread (profiler);
4534         start_dumper_thread (profiler);
4535 }
4536
4537 static void
4538 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4539 {
4540         char *nf;
4541         int force_delete = 0;
4542
4543         log_profiler = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4544         log_profiler->args = pstrdup (args);
4545         log_profiler->command_port = command_port;
4546
4547         if (filename && *filename == '-') {
4548                 force_delete = 1;
4549                 filename++;
4550                 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4551         }
4552
4553         //If filename begin with +, append the pid at the end
4554         if (filename && *filename == '+')
4555                 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4556
4557
4558         if (!filename) {
4559                 if (do_report)
4560                         filename = "|mprof-report -";
4561                 else
4562                         filename = "output.mlpd";
4563                 nf = (char*)filename;
4564         } else {
4565                 nf = new_filename (filename);
4566                 if (do_report) {
4567                         int s = strlen (nf) + 32;
4568                         char *p = (char *) g_malloc (s);
4569                         snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4570                         g_free (nf);
4571                         nf = p;
4572                 }
4573         }
4574         if (*nf == '|') {
4575                 log_profiler->file = popen (nf + 1, "w");
4576                 log_profiler->pipe_output = 1;
4577         } else if (*nf == '#') {
4578                 int fd = strtol (nf + 1, NULL, 10);
4579                 log_profiler->file = fdopen (fd, "a");
4580         } else {
4581                 if (force_delete)
4582                         unlink (nf);
4583                 log_profiler->file = fopen (nf, "wb");
4584         }
4585         if (!log_profiler->file) {
4586                 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4587                 exit (1);
4588         }
4589
4590 #if defined (HAVE_SYS_ZLIB)
4591         if (use_zip)
4592                 log_profiler->gzfile = gzdopen (fileno (log_profiler->file), "wb");
4593 #endif
4594
4595         /*
4596          * If you hit this assert while increasing MAX_FRAMES, you need to increase
4597          * SAMPLE_BLOCK_SIZE as well.
4598          */
4599         g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4600
4601         // FIXME: We should free this stuff too.
4602         mono_lock_free_allocator_init_size_class (&log_profiler->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4603         mono_lock_free_allocator_init_allocator (&log_profiler->sample_allocator, &log_profiler->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4604
4605         mono_lock_free_queue_init (&log_profiler->sample_reuse_queue);
4606
4607         g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4608
4609         // FIXME: We should free this stuff too.
4610         mono_lock_free_allocator_init_size_class (&log_profiler->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4611         mono_lock_free_allocator_init_allocator (&log_profiler->writer_entry_allocator, &log_profiler->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4612
4613         mono_lock_free_queue_init (&log_profiler->writer_queue);
4614         mono_os_sem_init (&log_profiler->writer_queue_sem, 0);
4615
4616         mono_lock_free_queue_init (&log_profiler->dumper_queue);
4617         mono_os_sem_init (&log_profiler->dumper_queue_sem, 0);
4618
4619         mono_os_mutex_init (&log_profiler->method_table_mutex);
4620         log_profiler->method_table = mono_conc_hashtable_new (NULL, NULL);
4621
4622         if (do_coverage)
4623                 coverage_init (log_profiler);
4624         log_profiler->coverage_filters = filters;
4625
4626         log_profiler->startup_time = current_time ();
4627 }
4628
4629 /*
4630  * declaration to silence the compiler: this is the entry point that
4631  * mono will load from the shared library and call.
4632  */
4633 extern void
4634 mono_profiler_startup (const char *desc);
4635
4636 extern void
4637 mono_profiler_startup_log (const char *desc);
4638
4639 /*
4640  * this is the entry point that will be used when the profiler
4641  * is embedded inside the main executable.
4642  */
4643 void
4644 mono_profiler_startup_log (const char *desc)
4645 {
4646         mono_profiler_startup (desc);
4647 }
4648
4649 void
4650 mono_profiler_startup (const char *desc)
4651 {
4652         GPtrArray *filters = NULL;
4653
4654         proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4655
4656         //XXX maybe later cleanup to use config directly
4657         nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4658         no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4659         do_report = config.do_report;
4660         do_debug = config.do_debug;
4661         do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4662         hs_mode_ondemand = config.hs_mode_ondemand;
4663         hs_mode_ms = config.hs_mode_ms;
4664         hs_mode_gc = config.hs_mode_gc;
4665         do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4666         use_zip = config.use_zip;
4667         command_port = config.command_port;
4668         num_frames = config.num_frames;
4669         notraces = config.notraces;
4670         max_allocated_sample_hits = config.max_allocated_sample_hits;
4671         max_call_depth = config.max_call_depth;
4672         do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4673         debug_coverage = config.debug_coverage;
4674         only_coverage = config.only_coverage;
4675
4676         if (config.cov_filter_files) {
4677                 filters = g_ptr_array_new ();
4678                 int i;
4679                 for (i = 0; i < config.cov_filter_files->len; ++i) {
4680                         const char *name = config.cov_filter_files->pdata [i];
4681                         parse_cov_filter_file (filters, name);
4682                 }
4683         }
4684
4685         init_time ();
4686
4687         PROF_TLS_INIT ();
4688
4689         create_profiler (desc, config.output_filename, filters);
4690
4691         mono_lls_init (&profiler_thread_list, NULL);
4692
4693         //This two events are required for the profiler to work
4694         int events = MONO_PROFILE_THREADS | MONO_PROFILE_GC;
4695
4696         //Required callbacks
4697         mono_profiler_install (log_profiler, log_shutdown);
4698         mono_profiler_install_runtime_initialized (runtime_initialized);
4699
4700         mono_profiler_install_gc (gc_event, gc_resize);
4701         mono_profiler_install_thread (thread_start, thread_end);
4702
4703         //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4704         mono_profiler_install_thread_name (thread_name);
4705
4706
4707         if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4708                 events |= MONO_PROFILE_APPDOMAIN_EVENTS;
4709                 mono_profiler_install_appdomain (NULL, domain_loaded, domain_unloaded, NULL);
4710                 mono_profiler_install_appdomain_name (domain_name);
4711         }
4712
4713         if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4714                 events |= MONO_PROFILE_ASSEMBLY_EVENTS;
4715                 mono_profiler_install_assembly (NULL, assembly_loaded, assembly_unloaded, NULL);
4716         }
4717
4718         if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4719                 events |= MONO_PROFILE_MODULE_EVENTS;
4720                 mono_profiler_install_module (NULL, image_loaded, image_unloaded, NULL);
4721         }
4722
4723         if (config.effective_mask & PROFLOG_CLASS_EVENTS) {
4724                 events |= MONO_PROFILE_CLASS_EVENTS;
4725                 mono_profiler_install_class (NULL, class_loaded, NULL, NULL);
4726         }
4727
4728         if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4729                 events |= MONO_PROFILE_JIT_COMPILATION;
4730                 mono_profiler_install_jit_end (method_jitted);
4731                 mono_profiler_install_code_buffer_new (code_buffer_new);
4732         }
4733
4734         if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4735                 events |= MONO_PROFILE_EXCEPTIONS;
4736                 mono_profiler_install_exception (throw_exc, method_exc_leave, NULL);
4737                 mono_profiler_install_exception_clause (clause_exc);
4738         }
4739
4740         if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4741                 events |= MONO_PROFILE_ALLOCATIONS;
4742                 mono_profiler_install_allocation (gc_alloc);
4743         }
4744
4745         //PROFLOG_GC_EVENTS is mandatory
4746         //PROFLOG_THREAD_EVENTS is mandatory
4747
4748         if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4749                 events |= MONO_PROFILE_ENTER_LEAVE;
4750                 mono_profiler_install_enter_leave (method_enter, method_leave);
4751         }
4752
4753         if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS) {
4754                 events |= MONO_PROFILE_INS_COVERAGE;
4755                 mono_profiler_install_coverage_filter (coverage_filter);
4756         }
4757
4758         //XXX should we check for PROFLOG_SAMPLING_FEATURE instead??
4759         if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4760                 events |= MONO_PROFILE_STATISTICAL;
4761                 mono_profiler_set_statistical_mode (config.sampling_mode, config.sample_freq);
4762                 mono_profiler_install_statistical (mono_sample_hit);
4763         }
4764
4765         if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4766                 events |= MONO_PROFILE_MONITOR_EVENTS;
4767                 mono_profiler_install_monitor (monitor_event);
4768         }
4769
4770         if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS) {
4771                 events |= MONO_PROFILE_GC_MOVES;
4772                 mono_profiler_install_gc_moves (gc_moves);
4773         }
4774
4775         // TODO split those in two profiler events
4776         if (config.effective_mask & (PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_HANDLE_EVENTS)) {
4777                 events |= MONO_PROFILE_GC_ROOTS;
4778                 mono_profiler_install_gc_roots (
4779                         config.effective_mask & (PROFLOG_GC_HANDLE_EVENTS) ? gc_handle : NULL,
4780                         (config.effective_mask & PROFLOG_GC_ROOT_EVENTS) ? gc_roots : NULL);
4781         }
4782
4783         if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4784                 events |= MONO_PROFILE_CONTEXT_EVENTS;
4785                 mono_profiler_install_context (context_loaded, context_unloaded);
4786         }
4787
4788         if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4789                 events |= MONO_PROFILE_GC_FINALIZATION;
4790                 mono_profiler_install_gc_finalize (finalize_begin, finalize_object_begin, finalize_object_end, finalize_end);
4791         } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4792                 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4793                 events |= MONO_PROFILE_GC_FINALIZATION;
4794                 mono_profiler_install_gc_finalize (NULL, NULL, NULL, finalize_end);
4795         }
4796
4797         //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4798         //PROFLOG_GC_HANDLE_EVENTS is handled together with PROFLOG_GC_ROOT_EVENTS
4799
4800         mono_profiler_set_events ((MonoProfileFlags)events);
4801 }