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_contentions_ctr,
 125               monitor_acquisitions_ctr,
 126               monitor_failures_ctr,
 127               thread_starts_ctr,
 128               thread_ends_ctr,
 129               thread_names_ctr,
 130               domain_loads_ctr,
 131               domain_unloads_ctr,
 132               domain_names_ctr,
 133               context_loads_ctr,
 134               context_unloads_ctr,
 135               sample_ubins_ctr,
 136               sample_usyms_ctr,
 137               sample_hits_ctr,
 138               counter_descriptors_ctr,
 139               counter_samples_ctr,
 140               perfcounter_descriptors_ctr,
 141               perfcounter_samples_ctr,
 142               coverage_methods_ctr,
 143               coverage_statements_ctr,
 144               coverage_classes_ctr,
 145               coverage_assemblies_ctr;
 146
 147 static MonoLinkedListSet profiler_thread_list;
 148
 149 /*
 150  * file format:
 151  * [header] [buffer]*
 152  *
 153  * The file is composed by a header followed by 0 or more buffers.
 154  * Each buffer contains events that happened on a thread: for a given thread
 155  * buffers that appear later in the file are guaranteed to contain events
 156  * that happened later in time. Buffers from separate threads could be interleaved,
 157  * though.
 158  * Buffers are not required to be aligned.
 159  *
 160  * header format:
 161  * [id: 4 bytes] constant value: LOG_HEADER_ID
 162  * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
 163  * [format: 1 byte] version of the data format for the rest of the file
 164  * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
 165  * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
 166  * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
 167  * [flags: 4 bytes] file format flags, should be 0 for now
 168  * [pid: 4 bytes] pid of the profiled process
 169  * [port: 2 bytes] tcp port for server if != 0
 170  * [args size: 4 bytes] size of args
 171  * [args: string] arguments passed to the profiler
 172  * [arch size: 4 bytes] size of arch
 173  * [arch: string] architecture the profiler is running on
 174  * [os size: 4 bytes] size of os
 175  * [os: string] operating system the profiler is running on
 176  *
 177  * The multiple byte integers are in little-endian format.
 178  *
 179  * buffer format:
 180  * [buffer header] [event]*
 181  * Buffers have a fixed-size header followed by 0 or more bytes of event data.
 182  * Timing information and other values in the event data are usually stored
 183  * as uleb128 or sleb128 integers. To save space, as noted for each item below,
 184  * some data is represented as a difference between the actual value and
 185  * either the last value of the same type (like for timing information) or
 186  * as the difference from a value stored in a buffer header.
 187  *
 188  * For timing information the data is stored as uleb128, since timing
 189  * increases in a monotonic way in each thread: the value is the number of
 190  * nanoseconds to add to the last seen timing data in a buffer. The first value
 191  * in a buffer will be calculated from the time_base field in the buffer head.
 192  *
 193  * Object or heap sizes are stored as uleb128.
 194  * Pointer differences are stored as sleb128, instead.
 195  *
 196  * If an unexpected value is found, the rest of the buffer should be ignored,
 197  * as generally the later values need the former to be interpreted correctly.
 198  *
 199  * buffer header format:
 200  * [bufid: 4 bytes] constant value: BUF_ID
 201  * [len: 4 bytes] size of the data following the buffer header
 202  * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
 203  * [ptr_base: 8 bytes] base value for pointers
 204  * [obj_base: 8 bytes] base value for object addresses
 205  * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
 206  * [method_base: 8 bytes] base value for MonoMethod pointers
 207  *
 208  * event format:
 209  * [extended info: upper 4 bits] [type: lower 4 bits]
 210  * [time diff: uleb128] nanoseconds since last timing
 211  * [data]*
 212  * The data that follows depends on type and the extended info.
 213  * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
 214  * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
 215  * The extended info bits are interpreted based on type, see
 216  * each individual event description below.
 217  * strings are represented as a 0-terminated utf8 sequence.
 218  *
 219  * backtrace format:
 220  * [num: uleb128] number of frames following
 221  * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
 222  * pointer or the buffer method_base
 223  *
 224  * type alloc format:
 225  * type: TYPE_ALLOC
 226  * exinfo: flags: TYPE_ALLOC_BT
 227  * [ptr: sleb128] class as a byte difference from ptr_base
 228  * [obj: sleb128] object address as a byte difference from obj_base
 229  * [size: uleb128] size of the object in the heap
 230  * If the TYPE_ALLOC_BT flag is set, a backtrace follows.
 231  *
 232  * type GC format:
 233  * type: TYPE_GC
 234  * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
 235  * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
 236  * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
 237  * if exinfo == TYPE_GC_RESIZE
 238  *      [heap_size: uleb128] new heap size
 239  * if exinfo == TYPE_GC_EVENT
 240  *      [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
 241  *      [generation: byte] GC generation event refers to
 242  * if exinfo == TYPE_GC_MOVE
 243  *      [num_objects: uleb128] number of object moves that follow
 244  *      [objaddr: sleb128]+ num_objects object pointer differences from obj_base
 245  *      num is always an even number: the even items are the old
 246  *      addresses, the odd numbers are the respective new object addresses
 247  * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
 248  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 249  *      upper bits reserved as flags
 250  *      [handle: uleb128] GC handle value
 251  *      [objaddr: sleb128] object pointer differences from obj_base
 252  *      If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
 253  * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
 254  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 255  *      upper bits reserved as flags
 256  *      [handle: uleb128] GC handle value
 257  *      If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
 258  * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
 259  *      [object: sleb128] the object as a difference from obj_base
 260  *
 261  * type metadata format:
 262  * type: TYPE_METADATA
 263  * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN)
 264  * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
 265  * TYPE_THREAD, TYPE_CONTEXT
 266  * [pointer: sleb128] pointer of the metadata type depending on mtype
 267  * if mtype == TYPE_CLASS
 268  *      [image: sleb128] MonoImage* as a pointer difference from ptr_base
 269  *      [name: string] full class name
 270  * if mtype == TYPE_IMAGE
 271  *      [name: string] image file name
 272  * if mtype == TYPE_ASSEMBLY
 273  *      [name: string] assembly name
 274  * if mtype == TYPE_DOMAIN && exinfo == 0
 275  *      [name: string] domain friendly name
 276  * if mtype == TYPE_CONTEXT
 277  *      [domain: sleb128] domain id as pointer
 278  * if mtype == TYPE_THREAD && exinfo == 0
 279  *      [name: string] thread name
 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: TYPE_THROW_BT flag or one of: TYPE_CLAUSE
 294  * if exinfo == TYPE_CLAUSE
 295  *      [clause type: byte] MonoExceptionEnum enum value
 296  *      [clause index: uleb128] index of the current clause
 297  *      [method: sleb128] MonoMethod* as a pointer difference from the last such
 298  *      pointer or the buffer method_base
 299  * else
 300  *      [object: sleb128] the exception object as a difference from obj_base
 301  *      if exinfo has TYPE_THROW_BT set, a backtrace follows.
 302  *
 303  * type runtime format:
 304  * type: TYPE_RUNTIME
 305  * exinfo: one of: TYPE_JITHELPER
 306  * if exinfo == TYPE_JITHELPER
 307  *      [type: byte] MonoProfilerCodeBufferType enum value
 308  *      [buffer address: sleb128] pointer to the native code as a diff from ptr_base
 309  *      [buffer size: uleb128] size of the generated code
 310  *      if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
 311  *              [name: string] buffer description name
 312  *
 313  * type monitor format:
 314  * type: TYPE_MONITOR
 315  * exinfo: TYPE_MONITOR_BT flag and one of: MONO_PROFILER_MONITOR_(CONTENTION|FAIL|DONE)
 316  * [object: sleb128] the lock object as a difference from obj_base
 317  * if exinfo.low3bits == MONO_PROFILER_MONITOR_CONTENTION
 318  *      If the TYPE_MONITOR_BT flag is set, a backtrace follows.
 319  *
 320  * type heap format
 321  * type: TYPE_HEAP
 322  * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
 323  * if exinfo == TYPE_HEAP_OBJECT
 324  *      [object: sleb128] the object as a difference from obj_base
 325  *      [class: sleb128] the object MonoClass* as a difference from ptr_base
 326  *      [size: uleb128] size of the object on the heap
 327  *      [num_refs: uleb128] number of object references
 328  *      each referenced objref is preceded by a uleb128 encoded offset: the
 329  *      first offset is from the object address and each next offset is relative
 330  *      to the previous one
 331  *      [objrefs: sleb128]+ object referenced as a difference from obj_base
 332  *      The same object can appear multiple times, but only the first time
 333  *      with size != 0: in the other cases this data will only be used to
 334  *      provide additional referenced objects.
 335  * if exinfo == TYPE_HEAP_ROOT
 336  *      [num_roots: uleb128] number of root references
 337  *      [num_gc: uleb128] number of major gcs
 338  *      [object: sleb128] the object as a difference from obj_base
 339  *      [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
 340  *      [extra_info: uleb128] the extra_info value
 341  *      object, root_type and extra_info are repeated num_roots times
 342  *
 343  * type sample format
 344  * type: TYPE_SAMPLE
 345  * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
 346  * if exinfo == TYPE_SAMPLE_HIT
 347  *      [thread: sleb128] thread id as difference from ptr_base
 348  *      [count: uleb128] number of following instruction addresses
 349  *      [ip: sleb128]* instruction pointer as difference from ptr_base
 350  *      [mbt_count: uleb128] number of managed backtrace frames
 351  *      [method: sleb128]* MonoMethod* as a pointer difference from the last such
 352  *      pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
 353  * if exinfo == TYPE_SAMPLE_USYM
 354  *      [address: sleb128] symbol address as a difference from ptr_base
 355  *      [size: uleb128] symbol size (may be 0 if unknown)
 356  *      [name: string] symbol name
 357  * if exinfo == TYPE_SAMPLE_UBIN
 358  *      [address: sleb128] address where binary has been loaded
 359  *      [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
 360  *      [size: uleb128] memory size
 361  *      [name: string] binary name
 362  * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
 363  *      [len: uleb128] number of counters
 364  *      for i = 0 to len
 365  *              [section: uleb128] section of counter
 366  *              if section == MONO_COUNTER_PERFCOUNTERS:
 367  *                      [section_name: string] section name of counter
 368  *              [name: string] name of counter
 369  *              [type: byte] type of counter
 370  *              [unit: byte] unit of counter
 371  *              [variance: byte] variance of counter
 372  *              [index: uleb128] unique index of counter
 373  * if exinfo == TYPE_SAMPLE_COUNTERS
 374  *      while true:
 375  *              [index: uleb128] unique index of counter
 376  *              if index == 0:
 377  *                      break
 378  *              [type: byte] type of counter value
 379  *              if type == string:
 380  *                      if value == null:
 381  *                              [0: uleb128] 0 -> value is null
 382  *                      else:
 383  *                              [1: uleb128] 1 -> value is not null
 384  *                              [value: string] counter value
 385  *              else:
 386  *                      [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
 387  *
 388  * type coverage format
 389  * type: TYPE_COVERAGE
 390  * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
 391  * if exinfo == TYPE_COVERAGE_METHOD
 392  *  [assembly: string] name of assembly
 393  *  [class: string] name of the class
 394  *  [name: string] name of the method
 395  *  [signature: string] the signature of the method
 396  *  [filename: string] the file path of the file that contains this method
 397  *  [token: uleb128] the method token
 398  *  [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
 399  *  [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
 400  * if exinfo == TYPE_COVERAGE_STATEMENTS
 401  *  [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
 402  *  [offset: uleb128] the il offset relative to the previous offset
 403  *  [counter: uleb128] the counter for this instruction
 404  *  [line: uleb128] the line of filename containing this instruction
 405  *  [column: uleb128] the column containing this instruction
 406  * if exinfo == TYPE_COVERAGE_ASSEMBLY
 407  *  [name: string] assembly name
 408  *  [guid: string] assembly GUID
 409  *  [filename: string] assembly filename
 410  *  [number_of_methods: uleb128] the number of methods in this assembly
 411  *  [fully_covered: uleb128] the number of fully covered methods
 412  *  [partially_covered: uleb128] the number of partially covered methods
 413  *    currently partially_covered will always be 0, and fully_covered is the
 414  *    number of methods that are fully and partially covered.
 415  * if exinfo == TYPE_COVERAGE_CLASS
 416  *  [name: string] assembly name
 417  *  [class: string] class name
 418  *  [number_of_methods: uleb128] the number of methods in this class
 419  *  [fully_covered: uleb128] the number of fully covered methods
 420  *  [partially_covered: uleb128] the number of partially covered methods
 421  *    currently partially_covered will always be 0, and fully_covered is the
 422  *    number of methods that are fully and partially covered.
 423  *
 424  * type meta format:
 425  * type: TYPE_META
 426  * exinfo: one of: TYPE_SYNC_POINT
 427  * if exinfo == TYPE_SYNC_POINT
 428  *      [type: byte] MonoProfilerSyncPointType enum value
 429  */
 430
 431 // Pending data to be written to the log, for a single thread.
 432 // Threads periodically flush their own LogBuffers by calling safe_send
 433 typedef struct _LogBuffer LogBuffer;
 434 struct _LogBuffer {
 435         // Next (older) LogBuffer in processing queue
 436         LogBuffer *next;
 437
 438         uint64_t time_base;
 439         uint64_t last_time;
 440         uintptr_t ptr_base;
 441         uintptr_t method_base;
 442         uintptr_t last_method;
 443         uintptr_t obj_base;
 444         uintptr_t thread_id;
 445
 446         // Bytes allocated for this LogBuffer
 447         int size;
 448
 449         // Start of currently unused space in buffer
 450         unsigned char* cursor;
 451
 452         // Pointer to start-of-structure-plus-size (for convenience)
 453         unsigned char* buf_end;
 454
 455         // Start of data in buffer. Contents follow "buffer format" described above.
 456         unsigned char buf [1];
 457 };
 458
 459 typedef struct {
 460         MonoLinkedListSetNode node;
 461
 462         // Convenience pointer to the profiler structure.
 463         MonoProfiler *profiler;
 464
 465         // Was this thread added to the LLS?
 466         gboolean attached;
 467
 468         // The current log buffer for this thread.
 469         LogBuffer *buffer;
 470
 471         // Methods referenced by events in `buffer`, see `MethodInfo`.
 472         GPtrArray *methods;
 473
 474         // Current call depth for enter/leave events.
 475         int call_depth;
 476
 477         // Indicates whether this thread is currently writing to its `buffer`.
 478         gboolean busy;
 479
 480         // Has this thread written a thread end event to `buffer`?
 481         gboolean ended;
 482 } MonoProfilerThread;
 483
 484 static uintptr_t
 485 thread_id (void)
 486 {
 487         return (uintptr_t) mono_native_thread_id_get ();
 488 }
 489
 490 static uintptr_t
 491 process_id (void)
 492 {
 493 #ifdef HOST_WIN32
 494         return (uintptr_t) GetCurrentProcessId ();
 495 #else
 496         return (uintptr_t) getpid ();
 497 #endif
 498 }
 499
 500 #ifdef __APPLE__
 501 static mach_timebase_info_data_t timebase_info;
 502 #elif defined (HOST_WIN32)
 503 static LARGE_INTEGER pcounter_freq;
 504 #endif
 505
 506 #define TICKS_PER_SEC 1000000000LL
 507
 508 static uint64_t
 509 current_time (void)
 510 {
 511 #ifdef __APPLE__
 512         uint64_t time = mach_absolute_time ();
 513
 514         time *= timebase_info.numer;
 515         time /= timebase_info.denom;
 516
 517         return time;
 518 #elif defined (HOST_WIN32)
 519         LARGE_INTEGER value;
 520
 521         QueryPerformanceCounter (&value);
 522
 523         return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
 524 #elif defined (CLOCK_MONOTONIC)
 525         struct timespec tspec;
 526
 527         clock_gettime (CLOCK_MONOTONIC, &tspec);
 528
 529         return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
 530 #else
 531         struct timeval tv;
 532
 533         gettimeofday (&tv, NULL);
 534
 535         return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
 536 #endif
 537 }
 538
 539 static int timer_overhead;
 540
 541 static void
 542 init_time (void)
 543 {
 544 #ifdef __APPLE__
 545         mach_timebase_info (&timebase_info);
 546 #elif defined (HOST_WIN32)
 547         QueryPerformanceFrequency (&pcounter_freq);
 548 #endif
 549
 550         uint64_t time_start = current_time ();
 551
 552         for (int i = 0; i < 256; ++i)
 553                 current_time ();
 554
 555         uint64_t time_end = current_time ();
 556
 557         timer_overhead = (time_end - time_start) / 256;
 558 }
 559
 560 /*
 561  * These macros should be used when writing an event to a log buffer. They take
 562  * care of a bunch of stuff that can be repetitive and error-prone, such as
 563  * acquiring/releasing the buffer lock, incrementing the event counter,
 564  * expanding the log buffer, processing requests, etc. They also create a scope
 565  * so that it's harder to leak the LogBuffer pointer, which can be problematic
 566  * as the pointer is unstable when the buffer lock isn't acquired.
 567  */
 568
 569 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
 570         do { \
 571                 MonoProfilerThread *thread__ = PROF_TLS_GET (); \
 572                 if (thread__->attached) \
 573                         buffer_lock (); \
 574                 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
 575                 thread__->busy = TRUE; \
 576                 InterlockedIncrement ((COUNTER)); \
 577                 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
 578
 579 #define EXIT_LOG_EXPLICIT(SEND) \
 580                 thread__->busy = FALSE; \
 581                 if ((SEND)) \
 582                         send_log_unsafe (TRUE); \
 583                 if (thread__->attached) \
 584                         buffer_unlock (); \
 585         } while (0)
 586
 587 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
 588 #define DO_SEND TRUE
 589 #define NO_SEND FALSE
 590
 591 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
 592
 593 static volatile gint32 buffer_rwlock_count;
 594 static volatile gpointer buffer_rwlock_exclusive;
 595
 596 // Can be used recursively.
 597 static void
 598 buffer_lock (void)
 599 {
 600         /*
 601          * If the thread holding the exclusive lock tries to modify the
 602          * reader count, just make it a no-op. This way, we also avoid
 603          * invoking the GC safe point macros below, which could break if
 604          * done from a thread that is currently the initiator of STW.
 605          *
 606          * In other words, we rely on the fact that the GC thread takes
 607          * the exclusive lock in the gc_event () callback when the world
 608          * is about to stop.
 609          */
 610         if (InterlockedReadPointer (&buffer_rwlock_exclusive) != (gpointer) thread_id ()) {
 611                 MONO_ENTER_GC_SAFE;
 612
 613                 while (InterlockedReadPointer (&buffer_rwlock_exclusive))
 614                         mono_thread_info_yield ();
 615
 616                 InterlockedIncrement (&buffer_rwlock_count);
 617
 618                 MONO_EXIT_GC_SAFE;
 619         }
 620
 621         mono_memory_barrier ();
 622 }
 623
 624 static void
 625 buffer_unlock (void)
 626 {
 627         mono_memory_barrier ();
 628
 629         // See the comment in buffer_lock ().
 630         if (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id ())
 631                 return;
 632
 633         g_assert (InterlockedRead (&buffer_rwlock_count) && "Why are we trying to decrement a zero reader count?");
 634
 635         InterlockedDecrement (&buffer_rwlock_count);
 636 }
 637
 638 // Cannot be used recursively.
 639 static void
 640 buffer_lock_excl (void)
 641 {
 642         gpointer tid = (gpointer) thread_id ();
 643
 644         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) != tid && "Why are we taking the exclusive lock twice?");
 645
 646         MONO_ENTER_GC_SAFE;
 647
 648         while (InterlockedCompareExchangePointer (&buffer_rwlock_exclusive, tid, 0))
 649                 mono_thread_info_yield ();
 650
 651         while (InterlockedRead (&buffer_rwlock_count))
 652                 mono_thread_info_yield ();
 653
 654         MONO_EXIT_GC_SAFE;
 655
 656         mono_memory_barrier ();
 657 }
 658
 659 static void
 660 buffer_unlock_excl (void)
 661 {
 662         mono_memory_barrier ();
 663
 664         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why is the exclusive lock not held?");
 665         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why does another thread hold the exclusive lock?");
 666         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why are there readers when the exclusive lock is held?");
 667
 668         InterlockedWritePointer (&buffer_rwlock_exclusive, NULL);
 669 }
 670
 671 typedef struct _BinaryObject BinaryObject;
 672 struct _BinaryObject {
 673         BinaryObject *next;
 674         void *addr;
 675         char *name;
 676 };
 677
 678 struct _MonoProfiler {
 679         FILE* file;
 680 #if defined (HAVE_SYS_ZLIB)
 681         gzFile gzfile;
 682 #endif
 683         char *args;
 684         uint64_t startup_time;
 685         int pipe_output;
 686         int command_port;
 687         int server_socket;
 688         int pipes [2];
 689         MonoNativeThreadId helper_thread;
 690         MonoNativeThreadId writer_thread;
 691         MonoNativeThreadId dumper_thread;
 692         volatile gint32 run_writer_thread;
 693         MonoLockFreeAllocSizeClass writer_entry_size_class;
 694         MonoLockFreeAllocator writer_entry_allocator;
 695         MonoLockFreeQueue writer_queue;
 696         MonoSemType writer_queue_sem;
 697         MonoConcurrentHashTable *method_table;
 698         mono_mutex_t method_table_mutex;
 699         volatile gint32 run_dumper_thread;
 700         MonoLockFreeQueue dumper_queue;
 701         MonoSemType dumper_queue_sem;
 702         MonoLockFreeAllocSizeClass sample_size_class;
 703         MonoLockFreeAllocator sample_allocator;
 704         MonoLockFreeQueue sample_reuse_queue;
 705         BinaryObject *binary_objects;
 706         GPtrArray *coverage_filters;
 707 };
 708
 709 typedef struct {
 710         MonoLockFreeQueueNode node;
 711         GPtrArray *methods;
 712         LogBuffer *buffer;
 713 } WriterQueueEntry;
 714
 715 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
 716
 717 typedef struct {
 718         MonoMethod *method;
 719         MonoJitInfo *ji;
 720         uint64_t time;
 721 } MethodInfo;
 722
 723 #ifdef HOST_WIN32
 724
 725 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
 726 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
 727 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
 728 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
 729
 730 static DWORD profiler_tls;
 731
 732 #elif HAVE_KW_THREAD
 733
 734 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
 735 #define PROF_TLS_GET() (profiler_tls)
 736 #define PROF_TLS_INIT()
 737 #define PROF_TLS_FREE()
 738
 739 static __thread MonoProfilerThread *profiler_tls;
 740
 741 #else
 742
 743 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
 744 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
 745 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
 746 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
 747
 748 static pthread_key_t profiler_tls;
 749
 750 #endif
 751
 752 static char*
 753 pstrdup (const char *s)
 754 {
 755         int len = strlen (s) + 1;
 756         char *p = (char *) g_malloc (len);
 757         memcpy (p, s, len);
 758         return p;
 759 }
 760
 761 static void *
 762 alloc_buffer (int size)
 763 {
 764         return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
 765 }
 766
 767 static void
 768 free_buffer (void *buf, int size)
 769 {
 770         mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
 771 }
 772
 773 static LogBuffer*
 774 create_buffer (uintptr_t tid)
 775 {
 776         LogBuffer* buf = (LogBuffer *) alloc_buffer (BUFFER_SIZE);
 777
 778         InterlockedIncrement (&buffer_allocations_ctr);
 779
 780         buf->size = BUFFER_SIZE;
 781         buf->time_base = current_time ();
 782         buf->last_time = buf->time_base;
 783         buf->buf_end = (unsigned char *) buf + buf->size;
 784         buf->cursor = buf->buf;
 785         buf->thread_id = tid;
 786
 787         return buf;
 788 }
 789
 790 /*
 791  * Must be called with the reader lock held if thread is the current thread, or
 792  * the exclusive lock if thread is a different thread. However, if thread is
 793  * the current thread, and init_thread () was called with add_to_lls = FALSE,
 794  * then no locking is necessary.
 795  */
 796 static void
 797 init_buffer_state (MonoProfilerThread *thread)
 798 {
 799         thread->buffer = create_buffer (thread->node.key);
 800         thread->methods = NULL;
 801 }
 802
 803 static void
 804 clear_hazard_pointers (MonoThreadHazardPointers *hp)
 805 {
 806         mono_hazard_pointer_clear (hp, 0);
 807         mono_hazard_pointer_clear (hp, 1);
 808         mono_hazard_pointer_clear (hp, 2);
 809 }
 810
 811 static MonoProfilerThread *
 812 init_thread (MonoProfiler *prof, gboolean add_to_lls)
 813 {
 814         MonoProfilerThread *thread = PROF_TLS_GET ();
 815
 816         /*
 817          * Sometimes we may try to initialize a thread twice. One example is the
 818          * main thread: We initialize it when setting up the profiler, but we will
 819          * also get a thread_start () callback for it. Another example is when
 820          * attaching new threads to the runtime: We may get a gc_alloc () callback
 821          * for that thread's thread object (where we initialize it), soon followed
 822          * by a thread_start () callback.
 823          *
 824          * These cases are harmless anyhow. Just return if we've already done the
 825          * initialization work.
 826          */
 827         if (thread)
 828                 return thread;
 829
 830         thread = g_malloc (sizeof (MonoProfilerThread));
 831         thread->node.key = thread_id ();
 832         thread->profiler = prof;
 833         thread->attached = add_to_lls;
 834         thread->call_depth = 0;
 835         thread->busy = 0;
 836         thread->ended = FALSE;
 837
 838         init_buffer_state (thread);
 839
 840         /*
 841          * Some internal profiler threads don't need to be cleaned up
 842          * by the main thread on shutdown.
 843          */
 844         if (add_to_lls) {
 845                 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
 846                 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
 847                 clear_hazard_pointers (hp);
 848         }
 849
 850         PROF_TLS_SET (thread);
 851
 852         return thread;
 853 }
 854
 855 // Only valid if init_thread () was called with add_to_lls = FALSE.
 856 static void
 857 deinit_thread (MonoProfilerThread *thread)
 858 {
 859         g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
 860
 861         g_free (thread);
 862         PROF_TLS_SET (NULL);
 863 }
 864
 865 // Only valid if init_thread () was called with add_to_lls = FALSE.
 866 static LogBuffer *
 867 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
 868 {
 869         LogBuffer *old = thread->buffer;
 870
 871         if (old && old->cursor + bytes + 100 < old->buf_end)
 872                 return old;
 873
 874         LogBuffer *new_ = create_buffer (thread->node.key);
 875         new_->next = old;
 876         thread->buffer = new_;
 877
 878         return new_;
 879 }
 880
 881 static void
 882 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
 883 {
 884         uint8_t *p = buf;
 885
 886         do {
 887                 uint8_t b = value & 0x7f;
 888                 value >>= 7;
 889
 890                 if (value != 0) /* more bytes to come */
 891                         b |= 0x80;
 892
 893                 *p ++ = b;
 894         } while (value);
 895
 896         *endbuf = p;
 897 }
 898
 899 static void
 900 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
 901 {
 902         int more = 1;
 903         int negative = (value < 0);
 904         unsigned int size = sizeof (intptr_t) * 8;
 905         uint8_t byte;
 906         uint8_t *p = buf;
 907
 908         while (more) {
 909                 byte = value & 0x7f;
 910                 value >>= 7;
 911
 912                 /* the following is unnecessary if the
 913                  * implementation of >>= uses an arithmetic rather
 914                  * than logical shift for a signed left operand
 915                  */
 916                 if (negative)
 917                         /* sign extend */
 918                         value |= - ((intptr_t) 1 <<(size - 7));
 919
 920                 /* sign bit of byte is second high order bit (0x40) */
 921                 if ((value == 0 && !(byte & 0x40)) ||
 922                     (value == -1 && (byte & 0x40)))
 923                         more = 0;
 924                 else
 925                         byte |= 0x80;
 926
 927                 *p ++= byte;
 928         }
 929
 930         *endbuf = p;
 931 }
 932
 933 static void
 934 emit_byte (LogBuffer *logbuffer, int value)
 935 {
 936         logbuffer->cursor [0] = value;
 937         logbuffer->cursor++;
 938
 939         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 940 }
 941
 942 static void
 943 emit_value (LogBuffer *logbuffer, int value)
 944 {
 945         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 946
 947         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 948 }
 949
 950 static void
 951 emit_time (LogBuffer *logbuffer, uint64_t value)
 952 {
 953         uint64_t tdiff = value - logbuffer->last_time;
 954         encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
 955         logbuffer->last_time = value;
 956
 957         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 958 }
 959
 960 static void
 961 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
 962 {
 963         emit_byte (logbuffer, event);
 964         emit_time (logbuffer, time);
 965 }
 966
 967 static void
 968 emit_event (LogBuffer *logbuffer, int event)
 969 {
 970         emit_event_time (logbuffer, event, current_time ());
 971 }
 972
 973 static void
 974 emit_svalue (LogBuffer *logbuffer, int64_t value)
 975 {
 976         encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 977
 978         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 979 }
 980
 981 static void
 982 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
 983 {
 984         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 985
 986         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 987 }
 988
 989 static void
 990 emit_ptr (LogBuffer *logbuffer, void *ptr)
 991 {
 992         if (!logbuffer->ptr_base)
 993                 logbuffer->ptr_base = (uintptr_t) ptr;
 994
 995         emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
 996
 997         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 998 }
 999
1000 static void
1001 emit_method_inner (LogBuffer *logbuffer, void *method)
1002 {
1003         if (!logbuffer->method_base) {
1004                 logbuffer->method_base = (intptr_t) method;
1005                 logbuffer->last_method = (intptr_t) method;
1006         }
1007
1008         encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1009         logbuffer->last_method = (intptr_t) method;
1010
1011         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1012 }
1013
1014 static void
1015 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1016 {
1017         MonoProfilerThread *thread = PROF_TLS_GET ();
1018
1019         if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1020                 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1021
1022                 info->method = method;
1023                 info->ji = ji;
1024                 info->time = current_time ();
1025
1026                 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1027                 g_ptr_array_add (arr, info);
1028         }
1029 }
1030
1031 static void
1032 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1033 {
1034         register_method_local (method, NULL);
1035         emit_method_inner (logbuffer, method);
1036 }
1037
1038 static void
1039 emit_obj (LogBuffer *logbuffer, void *ptr)
1040 {
1041         if (!logbuffer->obj_base)
1042                 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1043
1044         emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1045
1046         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1047 }
1048
1049 static void
1050 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1051 {
1052         size_t i = 0;
1053         if (str) {
1054                 for (; i < size; i++) {
1055                         if (str[i] == '\0')
1056                                 break;
1057                         emit_byte (logbuffer, str [i]);
1058                 }
1059         }
1060         emit_byte (logbuffer, '\0');
1061 }
1062
1063 static void
1064 emit_double (LogBuffer *logbuffer, double value)
1065 {
1066         int i;
1067         unsigned char buffer[8];
1068         memcpy (buffer, &value, 8);
1069 #if G_BYTE_ORDER == G_BIG_ENDIAN
1070         for (i = 7; i >= 0; i--)
1071 #else
1072         for (i = 0; i < 8; i++)
1073 #endif
1074                 emit_byte (logbuffer, buffer[i]);
1075 }
1076
1077 static char*
1078 write_int16 (char *buf, int32_t value)
1079 {
1080         int i;
1081         for (i = 0; i < 2; ++i) {
1082                 buf [i] = value;
1083                 value >>= 8;
1084         }
1085         return buf + 2;
1086 }
1087
1088 static char*
1089 write_int32 (char *buf, int32_t value)
1090 {
1091         int i;
1092         for (i = 0; i < 4; ++i) {
1093                 buf [i] = value;
1094                 value >>= 8;
1095         }
1096         return buf + 4;
1097 }
1098
1099 static char*
1100 write_int64 (char *buf, int64_t value)
1101 {
1102         int i;
1103         for (i = 0; i < 8; ++i) {
1104                 buf [i] = value;
1105                 value >>= 8;
1106         }
1107         return buf + 8;
1108 }
1109
1110 static char *
1111 write_header_string (char *p, const char *str)
1112 {
1113         size_t len = strlen (str) + 1;
1114
1115         p = write_int32 (p, len);
1116         strcpy (p, str);
1117
1118         return p + len;
1119 }
1120
1121 static void
1122 dump_header (MonoProfiler *profiler)
1123 {
1124         const char *args = profiler->args;
1125         const char *arch = mono_config_get_cpu ();
1126         const char *os = mono_config_get_os ();
1127
1128         char *hbuf = g_malloc (
1129                 sizeof (gint32) /* header id */ +
1130                 sizeof (gint8) /* major version */ +
1131                 sizeof (gint8) /* minor version */ +
1132                 sizeof (gint8) /* data version */ +
1133                 sizeof (gint8) /* word size */ +
1134                 sizeof (gint64) /* startup time */ +
1135                 sizeof (gint32) /* timer overhead */ +
1136                 sizeof (gint32) /* flags */ +
1137                 sizeof (gint32) /* process id */ +
1138                 sizeof (gint16) /* command port */ +
1139                 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1140                 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1141                 sizeof (gint32) + strlen (os) + 1 /* operating system */
1142         );
1143         char *p = hbuf;
1144
1145         p = write_int32 (p, LOG_HEADER_ID);
1146         *p++ = LOG_VERSION_MAJOR;
1147         *p++ = LOG_VERSION_MINOR;
1148         *p++ = LOG_DATA_VERSION;
1149         *p++ = sizeof (void *);
1150         p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1151         p = write_int32 (p, timer_overhead);
1152         p = write_int32 (p, 0); /* flags */
1153         p = write_int32 (p, process_id ());
1154         p = write_int16 (p, profiler->command_port);
1155         p = write_header_string (p, args);
1156         p = write_header_string (p, arch);
1157         p = write_header_string (p, os);
1158
1159 #if defined (HAVE_SYS_ZLIB)
1160         if (profiler->gzfile) {
1161                 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1162         } else
1163 #endif
1164         {
1165                 fwrite (hbuf, p - hbuf, 1, profiler->file);
1166                 fflush (profiler->file);
1167         }
1168
1169         g_free (hbuf);
1170 }
1171
1172 /*
1173  * Must be called with the reader lock held if thread is the current thread, or
1174  * the exclusive lock if thread is a different thread. However, if thread is
1175  * the current thread, and init_thread () was called with add_to_lls = FALSE,
1176  * then no locking is necessary.
1177  */
1178 static void
1179 send_buffer (MonoProfilerThread *thread)
1180 {
1181         WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1182         entry->methods = thread->methods;
1183         entry->buffer = thread->buffer;
1184
1185         mono_lock_free_queue_node_init (&entry->node, FALSE);
1186
1187         mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1188         mono_os_sem_post (&thread->profiler->writer_queue_sem);
1189 }
1190
1191 static void
1192 free_thread (gpointer p)
1193 {
1194         MonoProfilerThread *thread = p;
1195
1196         if (!thread->ended) {
1197                 /*
1198                  * The thread is being cleaned up by the main thread during
1199                  * shutdown. This typically happens for internal runtime
1200                  * threads. We need to synthesize a thread end event.
1201                  */
1202
1203                 InterlockedIncrement (&thread_ends_ctr);
1204
1205                 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1206                         LogBuffer *buf = ensure_logbuf_unsafe (thread,
1207                                 EVENT_SIZE /* event */ +
1208                                 BYTE_SIZE /* type */ +
1209                                 LEB128_SIZE /* tid */
1210                         );
1211
1212                         emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1213                         emit_byte (buf, TYPE_THREAD);
1214                         emit_ptr (buf, (void *) thread->node.key);
1215                 }
1216         }
1217
1218         send_buffer (thread);
1219
1220         g_free (thread);
1221 }
1222
1223 static void
1224 remove_thread (MonoProfilerThread *thread)
1225 {
1226         MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1227
1228         if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1229                 mono_thread_hazardous_try_free (thread, free_thread);
1230
1231         clear_hazard_pointers (hp);
1232 }
1233
1234 static void
1235 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1236 {
1237         char hbuf [128];
1238         char *p = hbuf;
1239
1240         if (buf->next)
1241                 dump_buffer (profiler, buf->next);
1242
1243         if (buf->cursor - buf->buf) {
1244                 p = write_int32 (p, BUF_ID);
1245                 p = write_int32 (p, buf->cursor - buf->buf);
1246                 p = write_int64 (p, buf->time_base);
1247                 p = write_int64 (p, buf->ptr_base);
1248                 p = write_int64 (p, buf->obj_base);
1249                 p = write_int64 (p, buf->thread_id);
1250                 p = write_int64 (p, buf->method_base);
1251
1252 #if defined (HAVE_SYS_ZLIB)
1253                 if (profiler->gzfile) {
1254                         gzwrite (profiler->gzfile, hbuf, p - hbuf);
1255                         gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1256                 } else
1257 #endif
1258                 {
1259                         fwrite (hbuf, p - hbuf, 1, profiler->file);
1260                         fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1261                         fflush (profiler->file);
1262                 }
1263         }
1264
1265         free_buffer (buf, buf->size);
1266 }
1267
1268 static void
1269 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1270 {
1271         for (LogBuffer *iter = buf; iter; iter = iter->next)
1272                 iter->thread_id = 0;
1273
1274         dump_buffer (profiler, buf);
1275 }
1276
1277 // Only valid if init_thread () was called with add_to_lls = FALSE.
1278 static void
1279 send_log_unsafe (gboolean if_needed)
1280 {
1281         MonoProfilerThread *thread = PROF_TLS_GET ();
1282
1283         if (!if_needed || (if_needed && thread->buffer->next)) {
1284                 if (!thread->attached)
1285                         for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1286                                 iter->thread_id = 0;
1287
1288                 send_buffer (thread);
1289                 init_buffer_state (thread);
1290         }
1291 }
1292
1293 // Assumes that the exclusive lock is held.
1294 static void
1295 sync_point_flush (void)
1296 {
1297         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1298
1299         MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1300                 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1301
1302                 send_buffer (thread);
1303                 init_buffer_state (thread);
1304         } MONO_LLS_FOREACH_SAFE_END
1305 }
1306
1307 // Assumes that the exclusive lock is held.
1308 static void
1309 sync_point_mark (MonoProfilerSyncPointType type)
1310 {
1311         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1312
1313         ENTER_LOG (&sync_points_ctr, logbuffer,
1314                 EVENT_SIZE /* event */ +
1315                 LEB128_SIZE /* type */
1316         );
1317
1318         emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1319         emit_byte (logbuffer, type);
1320
1321         EXIT_LOG_EXPLICIT (NO_SEND);
1322
1323         send_log_unsafe (FALSE);
1324 }
1325
1326 // Assumes that the exclusive lock is held.
1327 static void
1328 sync_point (MonoProfilerSyncPointType type)
1329 {
1330         sync_point_flush ();
1331         sync_point_mark (type);
1332 }
1333
1334 static int
1335 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1336 {
1337         /* account for object alignment in the heap */
1338         size += 7;
1339         size &= ~7;
1340
1341         ENTER_LOG (&heap_objects_ctr, logbuffer,
1342                 EVENT_SIZE /* event */ +
1343                 LEB128_SIZE /* obj */ +
1344                 LEB128_SIZE /* klass */ +
1345                 LEB128_SIZE /* size */ +
1346                 LEB128_SIZE /* num */ +
1347                 num * (
1348                         LEB128_SIZE /* offset */ +
1349                         LEB128_SIZE /* ref */
1350                 )
1351         );
1352
1353         emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1354         emit_obj (logbuffer, obj);
1355         emit_ptr (logbuffer, klass);
1356         emit_value (logbuffer, size);
1357         emit_value (logbuffer, num);
1358
1359         uintptr_t last_offset = 0;
1360
1361         for (int i = 0; i < num; ++i) {
1362                 emit_value (logbuffer, offsets [i] - last_offset);
1363                 last_offset = offsets [i];
1364                 emit_obj (logbuffer, refs [i]);
1365         }
1366
1367         EXIT_LOG_EXPLICIT (DO_SEND);
1368
1369         return 0;
1370 }
1371
1372 static unsigned int hs_mode_ms = 0;
1373 static unsigned int hs_mode_gc = 0;
1374 static unsigned int hs_mode_ondemand = 0;
1375 static unsigned int gc_count = 0;
1376 static uint64_t last_hs_time = 0;
1377 static gboolean do_heap_walk = FALSE;
1378 static gboolean ignore_heap_events;
1379
1380 static void
1381 heap_walk (MonoProfiler *profiler)
1382 {
1383         ENTER_LOG (&heap_starts_ctr, logbuffer,
1384                 EVENT_SIZE /* event */
1385         );
1386
1387         emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1388
1389         EXIT_LOG_EXPLICIT (DO_SEND);
1390
1391         mono_gc_walk_heap (0, gc_reference, NULL);
1392
1393         ENTER_LOG (&heap_ends_ctr, logbuffer,
1394                 EVENT_SIZE /* event */
1395         );
1396
1397         emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1398
1399         EXIT_LOG_EXPLICIT (DO_SEND);
1400 }
1401
1402 static void
1403 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
1404 {
1405         if (ignore_heap_events)
1406                 return;
1407
1408         ENTER_LOG (&heap_roots_ctr, logbuffer,
1409                 EVENT_SIZE /* event */ +
1410                 LEB128_SIZE /* num */ +
1411                 LEB128_SIZE /* collections */ +
1412                 num * (
1413                         LEB128_SIZE /* object */ +
1414                         LEB128_SIZE /* root type */ +
1415                         LEB128_SIZE /* extra info */
1416                 )
1417         );
1418
1419         emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1420         emit_value (logbuffer, num);
1421         emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1422
1423         for (int i = 0; i < num; ++i) {
1424                 emit_obj (logbuffer, objects [i]);
1425                 emit_byte (logbuffer, root_types [i]);
1426                 emit_value (logbuffer, extra_info [i]);
1427         }
1428
1429         EXIT_LOG_EXPLICIT (DO_SEND);
1430 }
1431
1432
1433 static void
1434 trigger_on_demand_heapshot (void)
1435 {
1436         if (heapshot_requested)
1437                 mono_gc_collect (mono_gc_max_generation ());
1438 }
1439
1440 static void
1441 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation)
1442 {
1443         if (ev == MONO_GC_EVENT_START) {
1444                 uint64_t now = current_time ();
1445
1446                 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1447                         do_heap_walk = TRUE;
1448                 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1449                         do_heap_walk = TRUE;
1450                 else if (hs_mode_ondemand)
1451                         do_heap_walk = heapshot_requested;
1452                 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1453                         do_heap_walk = TRUE;
1454
1455                 //If using heapshot, ignore events for collections we don't care
1456                 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1457                         // Ignore events generated during the collection itself (IE GC ROOTS)
1458                         ignore_heap_events = !do_heap_walk;
1459                 }
1460         }
1461
1462
1463         if (ENABLED (PROFLOG_GC_EVENTS)) {
1464                 ENTER_LOG (&gc_events_ctr, logbuffer,
1465                         EVENT_SIZE /* event */ +
1466                         BYTE_SIZE /* gc event */ +
1467                         BYTE_SIZE /* generation */
1468                 );
1469
1470                 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1471                 emit_byte (logbuffer, ev);
1472                 emit_byte (logbuffer, generation);
1473
1474                 EXIT_LOG_EXPLICIT (NO_SEND);
1475         }
1476
1477
1478         switch (ev) {
1479         case MONO_GC_EVENT_START:
1480                 if (generation == mono_gc_max_generation ())
1481                         gc_count++;
1482
1483                 break;
1484         case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1485                 /*
1486                  * Ensure that no thread can be in the middle of writing to
1487                  * a buffer when the world stops...
1488                  */
1489                 buffer_lock_excl ();
1490                 break;
1491         case MONO_GC_EVENT_POST_STOP_WORLD:
1492                 /*
1493                  * ... So that we now have a consistent view of all buffers.
1494                  * This allows us to flush them. We need to do this because
1495                  * they may contain object allocation events that need to be
1496                  * committed to the log file before any object move events
1497                  * that will be produced during this GC.
1498                  */
1499                 if (ENABLED (PROFLOG_ALLOCATION_EVENTS))
1500                         sync_point (SYNC_POINT_WORLD_STOP);
1501                 break;
1502         case MONO_GC_EVENT_PRE_START_WORLD:
1503                 if (do_heap_shot && do_heap_walk) {
1504                         heap_walk (profiler);
1505
1506                         do_heap_walk = FALSE;
1507                         heapshot_requested = 0;
1508                         last_hs_time = current_time ();
1509                 }
1510                 break;
1511         case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1512                 /*
1513                  * Similarly, we must now make sure that any object moves
1514                  * written to the GC thread's buffer are flushed. Otherwise,
1515                  * object allocation events for certain addresses could come
1516                  * after the move events that made those addresses available.
1517                  */
1518                 if (ENABLED (PROFLOG_GC_EVENTS | PROFLOG_GC_MOVES_EVENTS))
1519                         sync_point_mark (SYNC_POINT_WORLD_START);
1520
1521                 /*
1522                  * Finally, it is safe to allow other threads to write to
1523                  * their buffers again.
1524                  */
1525                 buffer_unlock_excl ();
1526                 break;
1527         default:
1528                 break;
1529         }
1530 }
1531
1532 static void
1533 gc_resize (MonoProfiler *profiler, int64_t new_size)
1534 {
1535         ENTER_LOG (&gc_resizes_ctr, logbuffer,
1536                 EVENT_SIZE /* event */ +
1537                 LEB128_SIZE /* new size */
1538         );
1539
1540         emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1541         emit_value (logbuffer, new_size);
1542
1543         EXIT_LOG_EXPLICIT (DO_SEND);
1544 }
1545
1546 typedef struct {
1547         int count;
1548         MonoMethod* methods [MAX_FRAMES];
1549         int32_t il_offsets [MAX_FRAMES];
1550         int32_t native_offsets [MAX_FRAMES];
1551 } FrameData;
1552
1553 static int num_frames = MAX_FRAMES;
1554
1555 static mono_bool
1556 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1557 {
1558         FrameData *frame = (FrameData *)data;
1559         if (method && frame->count < num_frames) {
1560                 frame->il_offsets [frame->count] = il_offset;
1561                 frame->native_offsets [frame->count] = native_offset;
1562                 frame->methods [frame->count++] = method;
1563                 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1564         }
1565         return frame->count == num_frames;
1566 }
1567
1568 /*
1569  * a note about stack walks: they can cause more profiler events to fire,
1570  * so we need to make sure they don't happen after we started emitting an
1571  * event, hence the collect_bt/emit_bt split.
1572  */
1573 static void
1574 collect_bt (FrameData *data)
1575 {
1576         data->count = 0;
1577         mono_stack_walk_no_il (walk_stack, data);
1578 }
1579
1580 static void
1581 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1582 {
1583         /* FIXME: this is actually tons of data and we should
1584          * just output it the first time and use an id the next
1585          */
1586         if (data->count > num_frames)
1587                 printf ("bad num frames: %d\n", data->count);
1588         emit_value (logbuffer, data->count);
1589         //if (*p != data.count) {
1590         //      printf ("bad num frames enc at %d: %d -> %d\n", count, data.count, *p); printf ("frames end: %p->%p\n", p, logbuffer->cursor); exit(0);}
1591         while (data->count) {
1592                 emit_method (logbuffer, data->methods [--data->count]);
1593         }
1594 }
1595
1596 static void
1597 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
1598 {
1599         init_thread (prof, TRUE);
1600
1601         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1602         FrameData data;
1603         uintptr_t len = mono_object_get_size (obj);
1604         /* account for object alignment in the heap */
1605         len += 7;
1606         len &= ~7;
1607
1608         if (do_bt)
1609                 collect_bt (&data);
1610
1611         ENTER_LOG (&gc_allocs_ctr, logbuffer,
1612                 EVENT_SIZE /* event */ +
1613                 LEB128_SIZE /* klass */ +
1614                 LEB128_SIZE /* obj */ +
1615                 LEB128_SIZE /* size */ +
1616                 (do_bt ? (
1617                         LEB128_SIZE /* count */ +
1618                         data.count * (
1619                                 LEB128_SIZE /* method */
1620                         )
1621                 ) : 0)
1622         );
1623
1624         emit_event (logbuffer, do_bt | TYPE_ALLOC);
1625         emit_ptr (logbuffer, klass);
1626         emit_obj (logbuffer, obj);
1627         emit_value (logbuffer, len);
1628
1629         if (do_bt)
1630                 emit_bt (prof, logbuffer, &data);
1631
1632         EXIT_LOG;
1633 }
1634
1635 static void
1636 gc_moves (MonoProfiler *prof, void **objects, int num)
1637 {
1638         ENTER_LOG (&gc_moves_ctr, logbuffer,
1639                 EVENT_SIZE /* event */ +
1640                 LEB128_SIZE /* num */ +
1641                 num * (
1642                         LEB128_SIZE /* object */
1643                 )
1644         );
1645
1646         emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1647         emit_value (logbuffer, num);
1648
1649         for (int i = 0; i < num; ++i)
1650                 emit_obj (logbuffer, objects [i]);
1651
1652         EXIT_LOG_EXPLICIT (DO_SEND);
1653 }
1654
1655 static void
1656 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
1657 {
1658         int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1659         FrameData data;
1660
1661         if (do_bt)
1662                 collect_bt (&data);
1663
1664         gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1665
1666         ENTER_LOG (ctr, logbuffer,
1667                 EVENT_SIZE /* event */ +
1668                 LEB128_SIZE /* type */ +
1669                 LEB128_SIZE /* handle */ +
1670                 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1671                         LEB128_SIZE /* obj */
1672                 ) : 0) +
1673                 (do_bt ? (
1674                         LEB128_SIZE /* count */ +
1675                         data.count * (
1676                                 LEB128_SIZE /* method */
1677                         )
1678                 ) : 0)
1679         );
1680
1681         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1682                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1683         else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1684                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1685         else
1686                 g_assert_not_reached ();
1687
1688         emit_value (logbuffer, type);
1689         emit_value (logbuffer, handle);
1690
1691         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1692                 emit_obj (logbuffer, obj);
1693
1694         if (do_bt)
1695                 emit_bt (prof, logbuffer, &data);
1696
1697         EXIT_LOG;
1698 }
1699
1700 static void
1701 finalize_begin (MonoProfiler *prof)
1702 {
1703         ENTER_LOG (&finalize_begins_ctr, buf,
1704                 EVENT_SIZE /* event */
1705         );
1706
1707         emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1708
1709         EXIT_LOG;
1710 }
1711
1712 static void
1713 finalize_end (MonoProfiler *prof)
1714 {
1715         trigger_on_demand_heapshot ();
1716         if (ENABLED (MONO_PROFILE_GC_FINALIZATION)) {
1717                 ENTER_LOG (&finalize_ends_ctr, buf,
1718                         EVENT_SIZE /* event */
1719                 );
1720
1721                 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1722
1723                 EXIT_LOG;
1724         }
1725 }
1726
1727 static void
1728 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1729 {
1730         ENTER_LOG (&finalize_object_begins_ctr, buf,
1731                 EVENT_SIZE /* event */ +
1732                 LEB128_SIZE /* obj */
1733         );
1734
1735         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1736         emit_obj (buf, obj);
1737
1738         EXIT_LOG;
1739 }
1740
1741 static void
1742 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1743 {
1744         ENTER_LOG (&finalize_object_ends_ctr, buf,
1745                 EVENT_SIZE /* event */ +
1746                 LEB128_SIZE /* obj */
1747         );
1748
1749         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1750         emit_obj (buf, obj);
1751
1752         EXIT_LOG;
1753 }
1754
1755 static char*
1756 push_nesting (char *p, MonoClass *klass)
1757 {
1758         MonoClass *nesting;
1759         const char *name;
1760         const char *nspace;
1761         nesting = mono_class_get_nesting_type (klass);
1762         if (nesting) {
1763                 p = push_nesting (p, nesting);
1764                 *p++ = '/';
1765                 *p = 0;
1766         }
1767         name = mono_class_get_name (klass);
1768         nspace = mono_class_get_namespace (klass);
1769         if (*nspace) {
1770                 strcpy (p, nspace);
1771                 p += strlen (nspace);
1772                 *p++ = '.';
1773                 *p = 0;
1774         }
1775         strcpy (p, name);
1776         p += strlen (name);
1777         return p;
1778 }
1779
1780 static char*
1781 type_name (MonoClass *klass)
1782 {
1783         char buf [1024];
1784         char *p;
1785         push_nesting (buf, klass);
1786         p = (char *) g_malloc (strlen (buf) + 1);
1787         strcpy (p, buf);
1788         return p;
1789 }
1790
1791 static void
1792 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
1793 {
1794         if (result != MONO_PROFILE_OK)
1795                 return;
1796
1797         const char *name = mono_image_get_filename (image);
1798         int nlen = strlen (name) + 1;
1799
1800         ENTER_LOG (&image_loads_ctr, logbuffer,
1801                 EVENT_SIZE /* event */ +
1802                 BYTE_SIZE /* type */ +
1803                 LEB128_SIZE /* image */ +
1804                 nlen /* name */
1805         );
1806
1807         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1808         emit_byte (logbuffer, TYPE_IMAGE);
1809         emit_ptr (logbuffer, image);
1810         memcpy (logbuffer->cursor, name, nlen);
1811         logbuffer->cursor += nlen;
1812
1813         EXIT_LOG;
1814 }
1815
1816 static void
1817 image_unloaded (MonoProfiler *prof, MonoImage *image)
1818 {
1819         const char *name = mono_image_get_filename (image);
1820         int nlen = strlen (name) + 1;
1821
1822         ENTER_LOG (&image_unloads_ctr, logbuffer,
1823                 EVENT_SIZE /* event */ +
1824                 BYTE_SIZE /* type */ +
1825                 LEB128_SIZE /* image */ +
1826                 nlen /* name */
1827         );
1828
1829         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1830         emit_byte (logbuffer, TYPE_IMAGE);
1831         emit_ptr (logbuffer, image);
1832         memcpy (logbuffer->cursor, name, nlen);
1833         logbuffer->cursor += nlen;
1834
1835         EXIT_LOG;
1836 }
1837
1838 static void
1839 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly, int result)
1840 {
1841         if (result != MONO_PROFILE_OK)
1842                 return;
1843
1844         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1845         int nlen = strlen (name) + 1;
1846
1847         ENTER_LOG (&assembly_loads_ctr, logbuffer,
1848                 EVENT_SIZE /* event */ +
1849                 BYTE_SIZE /* type */ +
1850                 LEB128_SIZE /* assembly */ +
1851                 nlen /* name */
1852         );
1853
1854         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1855         emit_byte (logbuffer, TYPE_ASSEMBLY);
1856         emit_ptr (logbuffer, assembly);
1857         memcpy (logbuffer->cursor, name, nlen);
1858         logbuffer->cursor += nlen;
1859
1860         EXIT_LOG;
1861
1862         mono_free (name);
1863 }
1864
1865 static void
1866 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1867 {
1868         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1869         int nlen = strlen (name) + 1;
1870
1871         ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1872                 EVENT_SIZE /* event */ +
1873                 BYTE_SIZE /* type */ +
1874                 LEB128_SIZE /* assembly */ +
1875                 nlen /* name */
1876         );
1877
1878         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1879         emit_byte (logbuffer, TYPE_ASSEMBLY);
1880         emit_ptr (logbuffer, assembly);
1881         memcpy (logbuffer->cursor, name, nlen);
1882         logbuffer->cursor += nlen;
1883
1884         EXIT_LOG;
1885
1886         mono_free (name);
1887 }
1888
1889 static void
1890 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
1891 {
1892         if (result != MONO_PROFILE_OK)
1893                 return;
1894
1895         char *name;
1896
1897         if (InterlockedRead (&runtime_inited))
1898                 name = mono_type_get_name (mono_class_get_type (klass));
1899         else
1900                 name = type_name (klass);
1901
1902         int nlen = strlen (name) + 1;
1903         MonoImage *image = mono_class_get_image (klass);
1904
1905         ENTER_LOG (&class_loads_ctr, logbuffer,
1906                 EVENT_SIZE /* event */ +
1907                 BYTE_SIZE /* type */ +
1908                 LEB128_SIZE /* klass */ +
1909                 LEB128_SIZE /* image */ +
1910                 nlen /* name */
1911         );
1912
1913         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1914         emit_byte (logbuffer, TYPE_CLASS);
1915         emit_ptr (logbuffer, klass);
1916         emit_ptr (logbuffer, image);
1917         memcpy (logbuffer->cursor, name, nlen);
1918         logbuffer->cursor += nlen;
1919
1920         EXIT_LOG;
1921
1922         if (runtime_inited)
1923                 mono_free (name);
1924         else
1925                 g_free (name);
1926 }
1927
1928 static void
1929 class_unloaded (MonoProfiler *prof, MonoClass *klass)
1930 {
1931         char *name;
1932
1933         if (InterlockedRead (&runtime_inited))
1934                 name = mono_type_get_name (mono_class_get_type (klass));
1935         else
1936                 name = type_name (klass);
1937
1938         int nlen = strlen (name) + 1;
1939         MonoImage *image = mono_class_get_image (klass);
1940
1941         ENTER_LOG (&class_unloads_ctr, logbuffer,
1942                 EVENT_SIZE /* event */ +
1943                 BYTE_SIZE /* type */ +
1944                 LEB128_SIZE /* klass */ +
1945                 LEB128_SIZE /* image */ +
1946                 nlen /* name */
1947         );
1948
1949         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1950         emit_byte (logbuffer, TYPE_CLASS);
1951         emit_ptr (logbuffer, klass);
1952         emit_ptr (logbuffer, image);
1953         memcpy (logbuffer->cursor, name, nlen);
1954         logbuffer->cursor += nlen;
1955
1956         EXIT_LOG;
1957
1958         if (runtime_inited)
1959                 mono_free (name);
1960         else
1961                 g_free (name);
1962 }
1963
1964 static void process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method);
1965
1966 static void
1967 method_enter (MonoProfiler *prof, MonoMethod *method)
1968 {
1969         process_method_enter_coverage (prof, method);
1970
1971         if (!only_coverage && PROF_TLS_GET ()->call_depth++ <= max_call_depth) {
1972                 ENTER_LOG (&method_entries_ctr, logbuffer,
1973                         EVENT_SIZE /* event */ +
1974                         LEB128_SIZE /* method */
1975                 );
1976
1977                 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
1978                 emit_method (logbuffer, method);
1979
1980                 EXIT_LOG;
1981         }
1982 }
1983
1984 static void
1985 method_leave (MonoProfiler *prof, MonoMethod *method)
1986 {
1987         if (!only_coverage && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
1988                 ENTER_LOG (&method_exits_ctr, logbuffer,
1989                         EVENT_SIZE /* event */ +
1990                         LEB128_SIZE /* method */
1991                 );
1992
1993                 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
1994                 emit_method (logbuffer, method);
1995
1996                 EXIT_LOG;
1997         }
1998 }
1999
2000 static void
2001 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
2002 {
2003         if (!only_coverage && !nocalls && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
2004                 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2005                         EVENT_SIZE /* event */ +
2006                         LEB128_SIZE /* method */
2007                 );
2008
2009                 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2010                 emit_method (logbuffer, method);
2011
2012                 EXIT_LOG;
2013         }
2014 }
2015
2016 static void
2017 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji, int result)
2018 {
2019         if (result != MONO_PROFILE_OK)
2020                 return;
2021
2022         register_method_local (method, ji);
2023 }
2024
2025 static void
2026 code_buffer_new (MonoProfiler *prof, void *buffer, int size, MonoProfilerCodeBufferType type, void *data)
2027 {
2028         char *name;
2029         int nlen;
2030
2031         if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2032                 name = (char *) data;
2033                 nlen = strlen (name) + 1;
2034         } else {
2035                 name = NULL;
2036                 nlen = 0;
2037         }
2038
2039         ENTER_LOG (&code_buffers_ctr, logbuffer,
2040                 EVENT_SIZE /* event */ +
2041                 BYTE_SIZE /* type */ +
2042                 LEB128_SIZE /* buffer */ +
2043                 LEB128_SIZE /* size */ +
2044                 (name ? (
2045                         nlen /* name */
2046                 ) : 0)
2047         );
2048
2049         emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2050         emit_byte (logbuffer, type);
2051         emit_ptr (logbuffer, buffer);
2052         emit_value (logbuffer, size);
2053
2054         if (name) {
2055                 memcpy (logbuffer->cursor, name, nlen);
2056                 logbuffer->cursor += nlen;
2057         }
2058
2059         EXIT_LOG;
2060 }
2061
2062 static void
2063 throw_exc (MonoProfiler *prof, MonoObject *object)
2064 {
2065         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2066         FrameData data;
2067
2068         if (do_bt)
2069                 collect_bt (&data);
2070
2071         ENTER_LOG (&exception_throws_ctr, logbuffer,
2072                 EVENT_SIZE /* event */ +
2073                 LEB128_SIZE /* object */ +
2074                 (do_bt ? (
2075                         LEB128_SIZE /* count */ +
2076                         data.count * (
2077                                 LEB128_SIZE /* method */
2078                         )
2079                 ) : 0)
2080         );
2081
2082         emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2083         emit_obj (logbuffer, object);
2084
2085         if (do_bt)
2086                 emit_bt (prof, logbuffer, &data);
2087
2088         EXIT_LOG;
2089 }
2090
2091 static void
2092 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num)
2093 {
2094         ENTER_LOG (&exception_clauses_ctr, logbuffer,
2095                 EVENT_SIZE /* event */ +
2096                 BYTE_SIZE /* clause type */ +
2097                 LEB128_SIZE /* clause num */ +
2098                 LEB128_SIZE /* method */
2099         );
2100
2101         emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2102         emit_byte (logbuffer, clause_type);
2103         emit_value (logbuffer, clause_num);
2104         emit_method (logbuffer, method);
2105
2106         EXIT_LOG;
2107 }
2108
2109 static void
2110 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent event)
2111 {
2112         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces && event == MONO_PROFILER_MONITOR_CONTENTION) ? TYPE_MONITOR_BT : 0;
2113         FrameData data;
2114
2115         if (do_bt)
2116                 collect_bt (&data);
2117
2118         gint32 *ctr;
2119
2120         switch (event) {
2121         case MONO_PROFILER_MONITOR_CONTENTION:
2122                 ctr = &monitor_contentions_ctr;
2123                 break;
2124         case MONO_PROFILER_MONITOR_DONE:
2125                 ctr = &monitor_acquisitions_ctr;
2126                 break;
2127         case MONO_PROFILER_MONITOR_FAIL:
2128                 ctr = &monitor_failures_ctr;
2129                 break;
2130         default:
2131                 g_assert_not_reached ();
2132                 break;
2133         }
2134
2135         ENTER_LOG (ctr, logbuffer,
2136                 EVENT_SIZE /* event */ +
2137                 LEB128_SIZE /* object */ +
2138                 (do_bt ? (
2139                         LEB128_SIZE /* count */ +
2140                         data.count * (
2141                                 LEB128_SIZE /* method */
2142                         )
2143                 ) : 0)
2144         );
2145
2146         emit_event (logbuffer, (event << 4) | do_bt | TYPE_MONITOR);
2147         emit_obj (logbuffer, object);
2148
2149         if (do_bt)
2150                 emit_bt (profiler, logbuffer, &data);
2151
2152         EXIT_LOG;
2153 }
2154
2155 static void
2156 thread_start (MonoProfiler *prof, uintptr_t tid)
2157 {
2158         init_thread (prof, TRUE);
2159
2160         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2161                 ENTER_LOG (&thread_starts_ctr, logbuffer,
2162                         EVENT_SIZE /* event */ +
2163                         BYTE_SIZE /* type */ +
2164                         LEB128_SIZE /* tid */
2165                 );
2166
2167                 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2168                 emit_byte (logbuffer, TYPE_THREAD);
2169                 emit_ptr (logbuffer, (void*) tid);
2170
2171                 EXIT_LOG;
2172         }
2173 }
2174
2175 static void
2176 thread_end (MonoProfiler *prof, uintptr_t tid)
2177 {
2178         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2179                 ENTER_LOG (&thread_ends_ctr, logbuffer,
2180                         EVENT_SIZE /* event */ +
2181                         BYTE_SIZE /* type */ +
2182                         LEB128_SIZE /* tid */
2183                 );
2184
2185                 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2186                 emit_byte (logbuffer, TYPE_THREAD);
2187                 emit_ptr (logbuffer, (void*) tid);
2188
2189                 EXIT_LOG_EXPLICIT (NO_SEND);
2190         }
2191
2192         MonoProfilerThread *thread = PROF_TLS_GET ();
2193
2194         thread->ended = TRUE;
2195         remove_thread (thread);
2196
2197         PROF_TLS_SET (NULL);
2198 }
2199
2200 static void
2201 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2202 {
2203         int len = strlen (name) + 1;
2204
2205         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2206                 ENTER_LOG (&thread_names_ctr, logbuffer,
2207                         EVENT_SIZE /* event */ +
2208                         BYTE_SIZE /* type */ +
2209                         LEB128_SIZE /* tid */ +
2210                         len /* name */
2211                 );
2212
2213                 emit_event (logbuffer, TYPE_METADATA);
2214                 emit_byte (logbuffer, TYPE_THREAD);
2215                 emit_ptr (logbuffer, (void*)tid);
2216                 memcpy (logbuffer->cursor, name, len);
2217                 logbuffer->cursor += len;
2218
2219                 EXIT_LOG;
2220         }
2221 }
2222
2223 static void
2224 domain_loaded (MonoProfiler *prof, MonoDomain *domain, int result)
2225 {
2226         if (result != MONO_PROFILE_OK)
2227                 return;
2228
2229         ENTER_LOG (&domain_loads_ctr, logbuffer,
2230                 EVENT_SIZE /* event */ +
2231                 BYTE_SIZE /* type */ +
2232                 LEB128_SIZE /* domain id */
2233         );
2234
2235         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2236         emit_byte (logbuffer, TYPE_DOMAIN);
2237         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2238
2239         EXIT_LOG;
2240 }
2241
2242 static void
2243 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2244 {
2245         ENTER_LOG (&domain_unloads_ctr, logbuffer,
2246                 EVENT_SIZE /* event */ +
2247                 BYTE_SIZE /* type */ +
2248                 LEB128_SIZE /* domain id */
2249         );
2250
2251         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2252         emit_byte (logbuffer, TYPE_DOMAIN);
2253         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2254
2255         EXIT_LOG;
2256 }
2257
2258 static void
2259 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2260 {
2261         int nlen = strlen (name) + 1;
2262
2263         ENTER_LOG (&domain_names_ctr, logbuffer,
2264                 EVENT_SIZE /* event */ +
2265                 BYTE_SIZE /* type */ +
2266                 LEB128_SIZE /* domain id */ +
2267                 nlen /* name */
2268         );
2269
2270         emit_event (logbuffer, TYPE_METADATA);
2271         emit_byte (logbuffer, TYPE_DOMAIN);
2272         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2273         memcpy (logbuffer->cursor, name, nlen);
2274         logbuffer->cursor += nlen;
2275
2276         EXIT_LOG;
2277 }
2278
2279 static void
2280 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2281 {
2282         ENTER_LOG (&context_loads_ctr, logbuffer,
2283                 EVENT_SIZE /* event */ +
2284                 BYTE_SIZE /* type */ +
2285                 LEB128_SIZE /* context id */ +
2286                 LEB128_SIZE /* domain id */
2287         );
2288
2289         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2290         emit_byte (logbuffer, TYPE_CONTEXT);
2291         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2292         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2293
2294         EXIT_LOG;
2295 }
2296
2297 static void
2298 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2299 {
2300         ENTER_LOG (&context_unloads_ctr, logbuffer,
2301                 EVENT_SIZE /* event */ +
2302                 BYTE_SIZE /* type */ +
2303                 LEB128_SIZE /* context id */ +
2304                 LEB128_SIZE /* domain id */
2305         );
2306
2307         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2308         emit_byte (logbuffer, TYPE_CONTEXT);
2309         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2310         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2311
2312         EXIT_LOG;
2313 }
2314
2315 typedef struct {
2316         MonoMethod *method;
2317         MonoDomain *domain;
2318         void *base_address;
2319         int offset;
2320 } AsyncFrameInfo;
2321
2322 typedef struct {
2323         MonoLockFreeQueueNode node;
2324         MonoProfiler *prof;
2325         uint64_t time;
2326         uintptr_t tid;
2327         void *ip;
2328         int count;
2329         AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2330 } SampleHit;
2331
2332 static mono_bool
2333 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2334 {
2335         SampleHit *sample = (SampleHit *) data;
2336
2337         if (sample->count < num_frames) {
2338                 int i = sample->count;
2339
2340                 sample->frames [i].method = method;
2341                 sample->frames [i].domain = domain;
2342                 sample->frames [i].base_address = base_address;
2343                 sample->frames [i].offset = offset;
2344
2345                 sample->count++;
2346         }
2347
2348         return sample->count == num_frames;
2349 }
2350
2351 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2352 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2353
2354 static void
2355 enqueue_sample_hit (gpointer p)
2356 {
2357         SampleHit *sample = p;
2358
2359         mono_lock_free_queue_node_unpoison (&sample->node);
2360         mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2361         mono_os_sem_post (&sample->prof->dumper_queue_sem);
2362 }
2363
2364 static void
2365 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
2366 {
2367         /*
2368          * Please note: We rely on the runtime loading the profiler with
2369          * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2370          * this function (and its siblings) are resolved when the profiler is
2371          * loaded. Otherwise, we would potentially invoke the dynamic linker when
2372          * invoking runtime functions, which is not async-signal-safe.
2373          */
2374
2375         if (InterlockedRead (&in_shutdown))
2376                 return;
2377
2378         SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2379
2380         if (!sample) {
2381                 /*
2382                  * If we're out of reusable sample events and we're not allowed to
2383                  * allocate more, we have no choice but to drop the event.
2384                  */
2385                 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2386                         return;
2387
2388                 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2389                 sample->prof = profiler;
2390                 mono_lock_free_queue_node_init (&sample->node, TRUE);
2391
2392                 InterlockedIncrement (&sample_allocations_ctr);
2393         }
2394
2395         sample->count = 0;
2396         mono_stack_walk_async_safe (&async_walk_stack, context, sample);
2397
2398         sample->time = current_time ();
2399         sample->tid = thread_id ();
2400         sample->ip = ip;
2401
2402         mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2403 }
2404
2405 static uintptr_t *code_pages = 0;
2406 static int num_code_pages = 0;
2407 static int size_code_pages = 0;
2408 #define CPAGE_SHIFT (9)
2409 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2410 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2411 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2412
2413 static uintptr_t
2414 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2415 {
2416         uintptr_t i;
2417         uintptr_t start_pos;
2418         start_pos = (page >> CPAGE_SHIFT) % hsize;
2419         i = start_pos;
2420         do {
2421                 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2422                         return 0;
2423                 } else if (!hash [i]) {
2424                         hash [i] = page;
2425                         return 1;
2426                 }
2427                 /* wrap around */
2428                 if (++i == hsize)
2429                         i = 0;
2430         } while (i != start_pos);
2431         /* should not happen */
2432         printf ("failed code page store\n");
2433         return 0;
2434 }
2435
2436 static void
2437 add_code_pointer (uintptr_t ip)
2438 {
2439         uintptr_t i;
2440         if (num_code_pages * 2 >= size_code_pages) {
2441                 uintptr_t *n;
2442                 uintptr_t old_size = size_code_pages;
2443                 size_code_pages *= 2;
2444                 if (size_code_pages == 0)
2445                         size_code_pages = 16;
2446                 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2447                 for (i = 0; i < old_size; ++i) {
2448                         if (code_pages [i])
2449                                 add_code_page (n, size_code_pages, code_pages [i]);
2450                 }
2451                 if (code_pages)
2452                         g_free (code_pages);
2453                 code_pages = n;
2454         }
2455         num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2456 }
2457
2458 /* ELF code crashes on some systems. */
2459 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2460 #if 0
2461 static void
2462 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2463 {
2464         int len = strlen (filename) + 1;
2465
2466         ENTER_LOG (&sample_ubins_ctr, logbuffer,
2467                 EVENT_SIZE /* event */ +
2468                 LEB128_SIZE /* load address */ +
2469                 LEB128_SIZE /* offset */ +
2470                 LEB128_SIZE /* size */ +
2471                 nlen /* file name */
2472         );
2473
2474         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2475         emit_svalue (logbuffer, load_addr);
2476         emit_uvalue (logbuffer, offset);
2477         emit_uvalue (logbuffer, size);
2478         memcpy (logbuffer->cursor, filename, len);
2479         logbuffer->cursor += len;
2480
2481         EXIT_LOG_EXPLICIT (DO_SEND);
2482 }
2483 #endif
2484
2485 static void
2486 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2487 {
2488         int len = strlen (name) + 1;
2489
2490         ENTER_LOG (&sample_usyms_ctr, logbuffer,
2491                 EVENT_SIZE /* event */ +
2492                 LEB128_SIZE /* value */ +
2493                 LEB128_SIZE /* size */ +
2494                 len /* name */
2495         );
2496
2497         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2498         emit_ptr (logbuffer, (void*)value);
2499         emit_value (logbuffer, size);
2500         memcpy (logbuffer->cursor, name, len);
2501         logbuffer->cursor += len;
2502
2503         EXIT_LOG_EXPLICIT (DO_SEND);
2504 }
2505
2506 /* ELF code crashes on some systems. */
2507 //#if defined(ELFMAG0)
2508 #if 0
2509
2510 #if SIZEOF_VOID_P == 4
2511 #define ELF_WSIZE 32
2512 #else
2513 #define ELF_WSIZE 64
2514 #endif
2515 #ifndef ElfW
2516 #define ElfW(type)      _ElfW (Elf, ELF_WSIZE, type)
2517 #define _ElfW(e,w,t)    _ElfW_1 (e, w, _##t)
2518 #define _ElfW_1(e,w,t)  e##w##t
2519 #endif
2520
2521 static void
2522 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2523 {
2524         int i;
2525         for (i = 0; i < num_symbols; ++i) {
2526                 const char* sym;
2527                 sym =  strtab + symbols [i].st_name;
2528                 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2529                         continue;
2530                 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2531                 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2532         }
2533 }
2534
2535 static int
2536 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2537 {
2538         int fd, i;
2539         void *data;
2540         struct stat statb;
2541         uint64_t file_size;
2542         ElfW(Ehdr) *header;
2543         ElfW(Shdr) *sheader;
2544         ElfW(Shdr) *shstrtabh;
2545         ElfW(Shdr) *symtabh = NULL;
2546         ElfW(Shdr) *strtabh = NULL;
2547         ElfW(Sym) *symbols = NULL;
2548         const char *strtab;
2549         int num_symbols;
2550
2551         fd = open (filename, O_RDONLY);
2552         if (fd < 0)
2553                 return 0;
2554         if (fstat (fd, &statb) != 0) {
2555                 close (fd);
2556                 return 0;
2557         }
2558         file_size = statb.st_size;
2559         data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2560         close (fd);
2561         if (data == MAP_FAILED)
2562                 return 0;
2563         header = data;
2564         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2565                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2566                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2567                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2568                 munmap (data, file_size);
2569                 return 0;
2570         }
2571         sheader = (void*)((char*)data + header->e_shoff);
2572         shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2573         strtab = (const char*)data + shstrtabh->sh_offset;
2574         for (i = 0; i < header->e_shnum; ++i) {
2575                 //printf ("section header: %d\n", sheader->sh_type);
2576                 if (sheader->sh_type == SHT_SYMTAB) {
2577                         symtabh = sheader;
2578                         strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2579                         /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2580                         break;
2581                 }
2582                 sheader = (void*)((char*)sheader + header->e_shentsize);
2583         }
2584         if (!symtabh || !strtabh) {
2585                 munmap (data, file_size);
2586                 return 0;
2587         }
2588         strtab = (const char*)data + strtabh->sh_offset;
2589         num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2590         symbols = (void*)((char*)data + symtabh->sh_offset);
2591         dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2592         munmap (data, file_size);
2593         return 1;
2594 }
2595 #endif
2596
2597 /* ELF code crashes on some systems. */
2598 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2599 #if 0
2600 static int
2601 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2602 {
2603         MonoProfiler *prof = data;
2604         char buf [256];
2605         const char *filename;
2606         BinaryObject *obj;
2607         char *a = (void*)info->dlpi_addr;
2608         int i, num_sym;
2609         ElfW(Dyn) *dyn = NULL;
2610         ElfW(Sym) *symtab = NULL;
2611         ElfW(Word) *hash_table = NULL;
2612         ElfW(Ehdr) *header = NULL;
2613         const char* strtab = NULL;
2614         for (obj = prof->binary_objects; obj; obj = obj->next) {
2615                 if (obj->addr == a)
2616                         return 0;
2617         }
2618         filename = info->dlpi_name;
2619         if (!filename)
2620                 return 0;
2621         if (!info->dlpi_addr && !filename [0]) {
2622                 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2623                 if (l > 0) {
2624                         buf [l] = 0;
2625                         filename = buf;
2626                 }
2627         }
2628         obj = g_calloc (sizeof (BinaryObject), 1);
2629         obj->addr = (void*)info->dlpi_addr;
2630         obj->name = pstrdup (filename);
2631         obj->next = prof->binary_objects;
2632         prof->binary_objects = obj;
2633         //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2634         a = NULL;
2635         for (i = 0; i < info->dlpi_phnum; ++i) {
2636                 //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);
2637                 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2638                         header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2639                         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2640                                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2641                                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2642                                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2643                                 header = NULL;
2644                         }
2645                         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);
2646                 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2647                         dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2648                 }
2649         }
2650         if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2651                 return 0;
2652         if (!info->dlpi_name || !info->dlpi_name[0])
2653                 return 0;
2654         if (!dyn)
2655                 return 0;
2656         for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2657                 if (dyn [i].d_tag == DT_SYMTAB) {
2658                         if (symtab && do_debug)
2659                                 printf ("multiple symtabs: %d\n", i);
2660                         symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2661                 } else if (dyn [i].d_tag == DT_HASH) {
2662                         hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2663                 } else if (dyn [i].d_tag == DT_STRTAB) {
2664                         strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2665                 }
2666         }
2667         if (!hash_table)
2668                 return 0;
2669         num_sym = hash_table [1];
2670         dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2671         return 0;
2672 }
2673
2674 static int
2675 load_binaries (MonoProfiler *prof)
2676 {
2677         dl_iterate_phdr (elf_dl_callback, prof);
2678         return 1;
2679 }
2680 #else
2681 static int
2682 load_binaries (MonoProfiler *prof)
2683 {
2684         return 0;
2685 }
2686 #endif
2687
2688 static const char*
2689 symbol_for (uintptr_t code)
2690 {
2691 #ifdef HAVE_DLADDR
2692         void *ip = (void*)code;
2693         Dl_info di;
2694         if (dladdr (ip, &di)) {
2695                 if (di.dli_sname)
2696                         return di.dli_sname;
2697         } else {
2698         /*      char **names;
2699                 names = backtrace_symbols (&ip, 1);
2700                 if (names) {
2701                         const char* p = names [0];
2702                         g_free (names);
2703                         return p;
2704                 }
2705                 */
2706         }
2707 #endif
2708         return NULL;
2709 }
2710
2711 static void
2712 dump_unmanaged_coderefs (MonoProfiler *prof)
2713 {
2714         int i;
2715         const char* last_symbol;
2716         uintptr_t addr, page_end;
2717
2718         if (load_binaries (prof))
2719                 return;
2720         for (i = 0; i < size_code_pages; ++i) {
2721                 const char* sym;
2722                 if (!code_pages [i] || code_pages [i] & 1)
2723                         continue;
2724                 last_symbol = NULL;
2725                 addr = CPAGE_ADDR (code_pages [i]);
2726                 page_end = addr + CPAGE_SIZE;
2727                 code_pages [i] |= 1;
2728                 /* we dump the symbols for the whole page */
2729                 for (; addr < page_end; addr += 16) {
2730                         sym = symbol_for (addr);
2731                         if (sym && sym == last_symbol)
2732                                 continue;
2733                         last_symbol = sym;
2734                         if (!sym)
2735                                 continue;
2736                         dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2737                         //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2738                 }
2739         }
2740 }
2741
2742 typedef struct MonoCounterAgent {
2743         MonoCounter *counter;
2744         // MonoCounterAgent specific data :
2745         void *value;
2746         size_t value_size;
2747         short index;
2748         short emitted;
2749         struct MonoCounterAgent *next;
2750 } MonoCounterAgent;
2751
2752 static MonoCounterAgent* counters;
2753 static int counters_index = 1;
2754 static mono_mutex_t counters_mutex;
2755
2756 static void
2757 counters_add_agent (MonoCounter *counter)
2758 {
2759         if (InterlockedRead (&in_shutdown))
2760                 return;
2761
2762         MonoCounterAgent *agent, *item;
2763
2764         mono_os_mutex_lock (&counters_mutex);
2765
2766         for (agent = counters; agent; agent = agent->next) {
2767                 if (agent->counter == counter) {
2768                         agent->value_size = 0;
2769                         if (agent->value) {
2770                                 g_free (agent->value);
2771                                 agent->value = NULL;
2772                         }
2773                         goto done;
2774                 }
2775         }
2776
2777         agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2778         agent->counter = counter;
2779         agent->value = NULL;
2780         agent->value_size = 0;
2781         agent->index = counters_index++;
2782         agent->emitted = 0;
2783         agent->next = NULL;
2784
2785         if (!counters) {
2786                 counters = agent;
2787         } else {
2788                 item = counters;
2789                 while (item->next)
2790                         item = item->next;
2791                 item->next = agent;
2792         }
2793
2794 done:
2795         mono_os_mutex_unlock (&counters_mutex);
2796 }
2797
2798 static mono_bool
2799 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2800 {
2801         counters_add_agent (counter);
2802         return TRUE;
2803 }
2804
2805 static void
2806 counters_init (MonoProfiler *profiler)
2807 {
2808         mono_os_mutex_init (&counters_mutex);
2809
2810         mono_counters_on_register (&counters_add_agent);
2811         mono_counters_foreach (counters_init_foreach_callback, NULL);
2812 }
2813
2814 static void
2815 counters_emit (MonoProfiler *profiler)
2816 {
2817         MonoCounterAgent *agent;
2818         int len = 0;
2819         int size =
2820                 EVENT_SIZE /* event */ +
2821                 LEB128_SIZE /* len */
2822         ;
2823
2824         mono_os_mutex_lock (&counters_mutex);
2825
2826         for (agent = counters; agent; agent = agent->next) {
2827                 if (agent->emitted)
2828                         continue;
2829
2830                 size +=
2831                         LEB128_SIZE /* section */ +
2832                         strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2833                         BYTE_SIZE /* type */ +
2834                         BYTE_SIZE /* unit */ +
2835                         BYTE_SIZE /* variance */ +
2836                         LEB128_SIZE /* index */
2837                 ;
2838
2839                 len++;
2840         }
2841
2842         if (!len)
2843                 goto done;
2844
2845         ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2846
2847         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2848         emit_value (logbuffer, len);
2849
2850         for (agent = counters; agent; agent = agent->next) {
2851                 const char *name;
2852
2853                 if (agent->emitted)
2854                         continue;
2855
2856                 name = mono_counter_get_name (agent->counter);
2857                 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2858                 emit_string (logbuffer, name, strlen (name) + 1);
2859                 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2860                 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2861                 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2862                 emit_value (logbuffer, agent->index);
2863
2864                 agent->emitted = 1;
2865         }
2866
2867         EXIT_LOG_EXPLICIT (DO_SEND);
2868
2869 done:
2870         mono_os_mutex_unlock (&counters_mutex);
2871 }
2872
2873 static void
2874 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2875 {
2876         MonoCounterAgent *agent;
2877         MonoCounter *counter;
2878         int type;
2879         int buffer_size;
2880         void *buffer;
2881         int size;
2882
2883         counters_emit (profiler);
2884
2885         buffer_size = 8;
2886         buffer = g_calloc (1, buffer_size);
2887
2888         mono_os_mutex_lock (&counters_mutex);
2889
2890         size =
2891                 EVENT_SIZE /* event */
2892         ;
2893
2894         for (agent = counters; agent; agent = agent->next) {
2895                 size +=
2896                         LEB128_SIZE /* index */ +
2897                         BYTE_SIZE /* type */ +
2898                         mono_counter_get_size (agent->counter) /* value */
2899                 ;
2900         }
2901
2902         size +=
2903                 LEB128_SIZE /* stop marker */
2904         ;
2905
2906         ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2907
2908         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2909
2910         for (agent = counters; agent; agent = agent->next) {
2911                 size_t size;
2912
2913                 counter = agent->counter;
2914
2915                 size = mono_counter_get_size (counter);
2916
2917                 if (size > buffer_size) {
2918                         buffer_size = size;
2919                         buffer = g_realloc (buffer, buffer_size);
2920                 }
2921
2922                 memset (buffer, 0, buffer_size);
2923
2924                 g_assert (mono_counters_sample (counter, buffer, size));
2925
2926                 type = mono_counter_get_type (counter);
2927
2928                 if (!agent->value) {
2929                         agent->value = g_calloc (1, size);
2930                         agent->value_size = size;
2931                 } else {
2932                         if (type == MONO_COUNTER_STRING) {
2933                                 if (strcmp (agent->value, buffer) == 0)
2934                                         continue;
2935                         } else {
2936                                 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2937                                         continue;
2938                         }
2939                 }
2940
2941                 emit_uvalue (logbuffer, agent->index);
2942                 emit_byte (logbuffer, type);
2943                 switch (type) {
2944                 case MONO_COUNTER_INT:
2945 #if SIZEOF_VOID_P == 4
2946                 case MONO_COUNTER_WORD:
2947 #endif
2948                         emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2949                         break;
2950                 case MONO_COUNTER_UINT:
2951                         emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2952                         break;
2953                 case MONO_COUNTER_TIME_INTERVAL:
2954                 case MONO_COUNTER_LONG:
2955 #if SIZEOF_VOID_P == 8
2956                 case MONO_COUNTER_WORD:
2957 #endif
2958                         emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2959                         break;
2960                 case MONO_COUNTER_ULONG:
2961                         emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2962                         break;
2963                 case MONO_COUNTER_DOUBLE:
2964                         emit_double (logbuffer, *(double*)buffer);
2965                         break;
2966                 case MONO_COUNTER_STRING:
2967                         if (size == 0) {
2968                                 emit_byte (logbuffer, 0);
2969                         } else {
2970                                 emit_byte (logbuffer, 1);
2971                                 emit_string (logbuffer, (char*)buffer, size);
2972                         }
2973                         break;
2974                 default:
2975                         g_assert_not_reached ();
2976                 }
2977
2978                 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
2979                         agent->value = g_realloc (agent->value, size);
2980                         agent->value_size = size;
2981                 }
2982
2983                 if (size > 0)
2984                         memcpy (agent->value, buffer, size);
2985         }
2986         g_free (buffer);
2987
2988         emit_value (logbuffer, 0);
2989
2990         EXIT_LOG_EXPLICIT (DO_SEND);
2991
2992         mono_os_mutex_unlock (&counters_mutex);
2993 }
2994
2995 typedef struct _PerfCounterAgent PerfCounterAgent;
2996 struct _PerfCounterAgent {
2997         PerfCounterAgent *next;
2998         int index;
2999         char *category_name;
3000         char *name;
3001         int type;
3002         gint64 value;
3003         guint8 emitted;
3004         guint8 updated;
3005         guint8 deleted;
3006 };
3007
3008 static PerfCounterAgent *perfcounters = NULL;
3009
3010 static void
3011 perfcounters_emit (MonoProfiler *profiler)
3012 {
3013         PerfCounterAgent *pcagent;
3014         int len = 0;
3015         int size =
3016                 EVENT_SIZE /* event */ +
3017                 LEB128_SIZE /* len */
3018         ;
3019
3020         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3021                 if (pcagent->emitted)
3022                         continue;
3023
3024                 size +=
3025                         LEB128_SIZE /* section */ +
3026                         strlen (pcagent->category_name) + 1 /* category name */ +
3027                         strlen (pcagent->name) + 1 /* name */ +
3028                         BYTE_SIZE /* type */ +
3029                         BYTE_SIZE /* unit */ +
3030                         BYTE_SIZE /* variance */ +
3031                         LEB128_SIZE /* index */
3032                 ;
3033
3034                 len++;
3035         }
3036
3037         if (!len)
3038                 return;
3039
3040         ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3041
3042         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3043         emit_value (logbuffer, len);
3044
3045         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3046                 if (pcagent->emitted)
3047                         continue;
3048
3049                 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3050                 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3051                 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3052                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3053                 emit_byte (logbuffer, MONO_COUNTER_RAW);
3054                 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3055                 emit_value (logbuffer, pcagent->index);
3056
3057                 pcagent->emitted = 1;
3058         }
3059
3060         EXIT_LOG_EXPLICIT (DO_SEND);
3061 }
3062
3063 static gboolean
3064 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3065 {
3066         PerfCounterAgent *pcagent;
3067
3068         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3069                 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3070                         continue;
3071                 if (pcagent->value == value)
3072                         return TRUE;
3073
3074                 pcagent->value = value;
3075                 pcagent->updated = 1;
3076                 pcagent->deleted = 0;
3077                 return TRUE;
3078         }
3079
3080         pcagent = g_new0 (PerfCounterAgent, 1);
3081         pcagent->next = perfcounters;
3082         pcagent->index = counters_index++;
3083         pcagent->category_name = g_strdup (category_name);
3084         pcagent->name = g_strdup (name);
3085         pcagent->type = (int) type;
3086         pcagent->value = value;
3087         pcagent->emitted = 0;
3088         pcagent->updated = 1;
3089         pcagent->deleted = 0;
3090
3091         perfcounters = pcagent;
3092
3093         return TRUE;
3094 }
3095
3096 static void
3097 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3098 {
3099         PerfCounterAgent *pcagent;
3100         int len = 0;
3101         int size;
3102
3103         mono_os_mutex_lock (&counters_mutex);
3104
3105         /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3106         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3107                 pcagent->deleted = 1;
3108
3109         mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3110
3111         perfcounters_emit (profiler);
3112
3113         size =
3114                 EVENT_SIZE /* event */
3115         ;
3116
3117         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3118                 if (pcagent->deleted || !pcagent->updated)
3119                         continue;
3120
3121                 size +=
3122                         LEB128_SIZE /* index */ +
3123                         BYTE_SIZE /* type */ +
3124                         LEB128_SIZE /* value */
3125                 ;
3126
3127                 len++;
3128         }
3129
3130         if (!len)
3131                 goto done;
3132
3133         size +=
3134                 LEB128_SIZE /* stop marker */
3135         ;
3136
3137         ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3138
3139         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3140
3141         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3142                 if (pcagent->deleted || !pcagent->updated)
3143                         continue;
3144                 emit_uvalue (logbuffer, pcagent->index);
3145                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3146                 emit_svalue (logbuffer, pcagent->value);
3147
3148                 pcagent->updated = 0;
3149         }
3150
3151         emit_value (logbuffer, 0);
3152
3153         EXIT_LOG_EXPLICIT (DO_SEND);
3154
3155 done:
3156         mono_os_mutex_unlock (&counters_mutex);
3157 }
3158
3159 static void
3160 counters_and_perfcounters_sample (MonoProfiler *prof)
3161 {
3162         uint64_t now = current_time ();
3163
3164         counters_sample (prof, now);
3165         perfcounters_sample (prof, now);
3166 }
3167
3168 #define COVERAGE_DEBUG(x) if (debug_coverage) {x}
3169 static mono_mutex_t coverage_mutex;
3170 static MonoConcurrentHashTable *coverage_methods = NULL;
3171 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3172 static MonoConcurrentHashTable *coverage_classes = NULL;
3173
3174 static MonoConcurrentHashTable *filtered_classes = NULL;
3175 static MonoConcurrentHashTable *entered_methods = NULL;
3176 static MonoConcurrentHashTable *image_to_methods = NULL;
3177 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3178 static gboolean coverage_initialized = FALSE;
3179
3180 static GPtrArray *coverage_data = NULL;
3181 static int previous_offset = 0;
3182
3183 typedef struct {
3184         MonoLockFreeQueueNode node;
3185         MonoMethod *method;
3186 } MethodNode;
3187
3188 typedef struct {
3189         int offset;
3190         int counter;
3191         char *filename;
3192         int line;
3193         int column;
3194 } CoverageEntry;
3195
3196 static void
3197 free_coverage_entry (gpointer data, gpointer userdata)
3198 {
3199         CoverageEntry *entry = (CoverageEntry *)data;
3200         g_free (entry->filename);
3201         g_free (entry);
3202 }
3203
3204 static void
3205 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfileCoverageEntry *entry)
3206 {
3207         int offset = entry->iloffset - previous_offset;
3208         CoverageEntry *e = g_new (CoverageEntry, 1);
3209
3210         previous_offset = entry->iloffset;
3211
3212         e->offset = offset;
3213         e->counter = entry->counter;
3214         e->filename = g_strdup(entry->filename ? entry->filename : "");
3215         e->line = entry->line;
3216         e->column = entry->col;
3217
3218         g_ptr_array_add (coverage_data, e);
3219 }
3220
3221 static char *
3222 parse_generic_type_names(char *name)
3223 {
3224         char *new_name, *ret;
3225         int within_generic_declaration = 0, generic_members = 1;
3226
3227         if (name == NULL || *name == '\0')
3228                 return g_strdup ("");
3229
3230         if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3231                 return NULL;
3232
3233         do {
3234                 switch (*name) {
3235                         case '<':
3236                                 within_generic_declaration = 1;
3237                                 break;
3238
3239                         case '>':
3240                                 within_generic_declaration = 0;
3241
3242                                 if (*(name - 1) != '<') {
3243                                         *new_name++ = '`';
3244                                         *new_name++ = '0' + generic_members;
3245                                 } else {
3246                                         memcpy (new_name, "&lt;&gt;", 8);
3247                                         new_name += 8;
3248                                 }
3249
3250                                 generic_members = 0;
3251                                 break;
3252
3253                         case ',':
3254                                 generic_members++;
3255                                 break;
3256
3257                         default:
3258                                 if (!within_generic_declaration)
3259                                         *new_name++ = *name;
3260
3261                                 break;
3262                 }
3263         } while (*name++);
3264
3265         return ret;
3266 }
3267
3268 static int method_id;
3269 static void
3270 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3271 {
3272         MonoMethod *method = (MonoMethod *)value;
3273         MonoProfiler *prof = (MonoProfiler *)userdata;
3274         MonoClass *klass;
3275         MonoImage *image;
3276         char *class_name;
3277         const char *image_name, *method_name, *sig, *first_filename;
3278         guint i;
3279
3280         previous_offset = 0;
3281         coverage_data = g_ptr_array_new ();
3282
3283         mono_profiler_coverage_get (prof, method, obtain_coverage_for_method);
3284
3285         klass = mono_method_get_class (method);
3286         image = mono_class_get_image (klass);
3287         image_name = mono_image_get_name (image);
3288
3289         sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3290         class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3291         method_name = mono_method_get_name (method);
3292
3293         if (coverage_data->len != 0) {
3294                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3295                 first_filename = entry->filename ? entry->filename : "";
3296         } else
3297                 first_filename = "";
3298
3299         image_name = image_name ? image_name : "";
3300         sig = sig ? sig : "";
3301         method_name = method_name ? method_name : "";
3302
3303         ENTER_LOG (&coverage_methods_ctr, logbuffer,
3304                 EVENT_SIZE /* event */ +
3305                 strlen (image_name) + 1 /* image name */ +
3306                 strlen (class_name) + 1 /* class name */ +
3307                 strlen (method_name) + 1 /* method name */ +
3308                 strlen (sig) + 1 /* signature */ +
3309                 strlen (first_filename) + 1 /* first file name */ +
3310                 LEB128_SIZE /* token */ +
3311                 LEB128_SIZE /* method id */ +
3312                 LEB128_SIZE /* entries */
3313         );
3314
3315         emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3316         emit_string (logbuffer, image_name, strlen (image_name) + 1);
3317         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3318         emit_string (logbuffer, method_name, strlen (method_name) + 1);
3319         emit_string (logbuffer, sig, strlen (sig) + 1);
3320         emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3321
3322         emit_uvalue (logbuffer, mono_method_get_token (method));
3323         emit_uvalue (logbuffer, method_id);
3324         emit_value (logbuffer, coverage_data->len);
3325
3326         EXIT_LOG_EXPLICIT (DO_SEND);
3327
3328         for (i = 0; i < coverage_data->len; i++) {
3329                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3330
3331                 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3332                         EVENT_SIZE /* event */ +
3333                         LEB128_SIZE /* method id */ +
3334                         LEB128_SIZE /* offset */ +
3335                         LEB128_SIZE /* counter */ +
3336                         LEB128_SIZE /* line */ +
3337                         LEB128_SIZE /* column */
3338                 );
3339
3340                 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3341                 emit_uvalue (logbuffer, method_id);
3342                 emit_uvalue (logbuffer, entry->offset);
3343                 emit_uvalue (logbuffer, entry->counter);
3344                 emit_uvalue (logbuffer, entry->line);
3345                 emit_uvalue (logbuffer, entry->column);
3346
3347                 EXIT_LOG_EXPLICIT (DO_SEND);
3348         }
3349
3350         method_id++;
3351
3352         g_free (class_name);
3353
3354         g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3355         g_ptr_array_free (coverage_data, TRUE);
3356         coverage_data = NULL;
3357 }
3358
3359 /* This empties the queue */
3360 static guint
3361 count_queue (MonoLockFreeQueue *queue)
3362 {
3363         MonoLockFreeQueueNode *node;
3364         guint count = 0;
3365
3366         while ((node = mono_lock_free_queue_dequeue (queue))) {
3367                 count++;
3368                 mono_thread_hazardous_try_free (node, g_free);
3369         }
3370
3371         return count;
3372 }
3373
3374 static void
3375 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3376 {
3377         MonoClass *klass = (MonoClass *)key;
3378         MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3379         MonoImage *image;
3380         char *class_name;
3381         const char *assembly_name;
3382         int number_of_methods, partially_covered;
3383         guint fully_covered;
3384
3385         image = mono_class_get_image (klass);
3386         assembly_name = mono_image_get_name (image);
3387         class_name = mono_type_get_name (mono_class_get_type (klass));
3388
3389         assembly_name = assembly_name ? assembly_name : "";
3390         number_of_methods = mono_class_num_methods (klass);
3391         fully_covered = count_queue (class_methods);
3392         /* We don't handle partial covered yet */
3393         partially_covered = 0;
3394
3395         ENTER_LOG (&coverage_classes_ctr, logbuffer,
3396                 EVENT_SIZE /* event */ +
3397                 strlen (assembly_name) + 1 /* assembly name */ +
3398                 strlen (class_name) + 1 /* class name */ +
3399                 LEB128_SIZE /* no. methods */ +
3400                 LEB128_SIZE /* fully covered */ +
3401                 LEB128_SIZE /* partially covered */
3402         );
3403
3404         emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3405         emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3406         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3407         emit_uvalue (logbuffer, number_of_methods);
3408         emit_uvalue (logbuffer, fully_covered);
3409         emit_uvalue (logbuffer, partially_covered);
3410
3411         EXIT_LOG_EXPLICIT (DO_SEND);
3412
3413         g_free (class_name);
3414 }
3415
3416 static void
3417 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3418 {
3419         MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3420
3421         *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3422         if (image_methods)
3423                 *fully_covered = count_queue (image_methods);
3424         else
3425                 *fully_covered = 0;
3426
3427         // FIXME: We don't handle partially covered yet.
3428         *partially_covered = 0;
3429 }
3430
3431 static void
3432 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3433 {
3434         MonoAssembly *assembly = (MonoAssembly *)value;
3435         MonoImage *image = mono_assembly_get_image (assembly);
3436         const char *name, *guid, *filename;
3437         int number_of_methods = 0, partially_covered = 0;
3438         guint fully_covered = 0;
3439
3440         name = mono_image_get_name (image);
3441         guid = mono_image_get_guid (image);
3442         filename = mono_image_get_filename (image);
3443
3444         name = name ? name : "";
3445         guid = guid ? guid : "";
3446         filename = filename ? filename : "";
3447
3448         get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3449
3450         ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3451                 EVENT_SIZE /* event */ +
3452                 strlen (name) + 1 /* name */ +
3453                 strlen (guid) + 1 /* guid */ +
3454                 strlen (filename) + 1 /* file name */ +
3455                 LEB128_SIZE /* no. methods */ +
3456                 LEB128_SIZE /* fully covered */ +
3457                 LEB128_SIZE /* partially covered */
3458         );
3459
3460         emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3461         emit_string (logbuffer, name, strlen (name) + 1);
3462         emit_string (logbuffer, guid, strlen (guid) + 1);
3463         emit_string (logbuffer, filename, strlen (filename) + 1);
3464         emit_uvalue (logbuffer, number_of_methods);
3465         emit_uvalue (logbuffer, fully_covered);
3466         emit_uvalue (logbuffer, partially_covered);
3467
3468         EXIT_LOG_EXPLICIT (DO_SEND);
3469 }
3470
3471 static void
3472 dump_coverage (MonoProfiler *prof)
3473 {
3474         if (!coverage_initialized)
3475                 return;
3476
3477         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Started dump\n");)
3478         method_id = 0;
3479
3480         mono_os_mutex_lock (&coverage_mutex);
3481         mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3482         mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3483         mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3484         mono_os_mutex_unlock (&coverage_mutex);
3485
3486         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Finished dump\n");)
3487 }
3488
3489 static void
3490 process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method)
3491 {
3492         MonoClass *klass;
3493         MonoImage *image;
3494
3495         if (!coverage_initialized)
3496                 return;
3497
3498         klass = mono_method_get_class (method);
3499         image = mono_class_get_image (klass);
3500
3501         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)))
3502                 return;
3503
3504         mono_os_mutex_lock (&coverage_mutex);
3505         mono_conc_hashtable_insert (entered_methods, method, method);
3506         mono_os_mutex_unlock (&coverage_mutex);
3507 }
3508
3509 static MonoLockFreeQueueNode *
3510 create_method_node (MonoMethod *method)
3511 {
3512         MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3513         mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3514         node->method = method;
3515
3516         return (MonoLockFreeQueueNode *) node;
3517 }
3518
3519 static gboolean
3520 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3521 {
3522         MonoError error;
3523         MonoClass *klass;
3524         MonoImage *image;
3525         MonoAssembly *assembly;
3526         MonoMethodHeader *header;
3527         guint32 iflags, flags, code_size;
3528         char *fqn, *classname;
3529         gboolean has_positive, found;
3530         MonoLockFreeQueue *image_methods, *class_methods;
3531         MonoLockFreeQueueNode *node;
3532
3533         g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3534
3535         COVERAGE_DEBUG(fprintf (stderr, "Coverage filter for %s\n", mono_method_get_name (method));)
3536
3537         flags = mono_method_get_flags (method, &iflags);
3538         if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3539             (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/)) {
3540                 COVERAGE_DEBUG(fprintf (stderr, "   Internal call or pinvoke - ignoring\n");)
3541                 return FALSE;
3542         }
3543
3544         // Don't need to do anything else if we're already tracking this method
3545         if (mono_conc_hashtable_lookup (coverage_methods, method)) {
3546                 COVERAGE_DEBUG(fprintf (stderr, "   Already tracking\n");)
3547                 return TRUE;
3548         }
3549
3550         klass = mono_method_get_class (method);
3551         image = mono_class_get_image (klass);
3552
3553         // Don't handle coverage for the core assemblies
3554         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3555                 return FALSE;
3556
3557         if (prof->coverage_filters) {
3558                 /* Check already filtered classes first */
3559                 if (mono_conc_hashtable_lookup (filtered_classes, klass)) {
3560                         COVERAGE_DEBUG(fprintf (stderr, "   Already filtered\n");)
3561                         return FALSE;
3562                 }
3563
3564                 classname = mono_type_get_name (mono_class_get_type (klass));
3565
3566                 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3567
3568                 COVERAGE_DEBUG(fprintf (stderr, "   Looking for %s in filter\n", fqn);)
3569                 // Check positive filters first
3570                 has_positive = FALSE;
3571                 found = FALSE;
3572                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3573                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3574
3575                         if (filter [0] == '+') {
3576                                 filter = &filter [1];
3577
3578                                 COVERAGE_DEBUG(fprintf (stderr, "   Checking against +%s ...", filter);)
3579
3580                                 if (strstr (fqn, filter) != NULL) {
3581                                         COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3582                                         found = TRUE;
3583                                 } else
3584                                         COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3585
3586                                 has_positive = TRUE;
3587                         }
3588                 }
3589
3590                 if (has_positive && !found) {
3591                         COVERAGE_DEBUG(fprintf (stderr, "   Positive match was not found\n");)
3592
3593                         mono_os_mutex_lock (&coverage_mutex);
3594                         mono_conc_hashtable_insert (filtered_classes, klass, klass);
3595                         mono_os_mutex_unlock (&coverage_mutex);
3596                         g_free (fqn);
3597                         g_free (classname);
3598
3599                         return FALSE;
3600                 }
3601
3602                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3603                         // FIXME: Is substring search sufficient?
3604                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3605                         if (filter [0] == '+')
3606                                 continue;
3607
3608                         // Skip '-'
3609                         filter = &filter [1];
3610                         COVERAGE_DEBUG(fprintf (stderr, "   Checking against -%s ...", filter);)
3611
3612                         if (strstr (fqn, filter) != NULL) {
3613                                 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3614
3615                                 mono_os_mutex_lock (&coverage_mutex);
3616                                 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3617                                 mono_os_mutex_unlock (&coverage_mutex);
3618                                 g_free (fqn);
3619                                 g_free (classname);
3620
3621                                 return FALSE;
3622                         } else
3623                                 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3624
3625                 }
3626
3627                 g_free (fqn);
3628                 g_free (classname);
3629         }
3630
3631         COVERAGE_DEBUG(fprintf (stderr, "   Handling coverage for %s\n", mono_method_get_name (method));)
3632         header = mono_method_get_header_checked (method, &error);
3633         mono_error_cleanup (&error);
3634
3635         mono_method_header_get_code (header, &code_size, NULL);
3636
3637         assembly = mono_image_get_assembly (image);
3638
3639         // Need to keep the assemblies around for as long as they are kept in the hashtable
3640         // Nunit, for example, has a habit of unloading them before the coverage statistics are
3641         // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3642         mono_assembly_addref (assembly);
3643
3644         mono_os_mutex_lock (&coverage_mutex);
3645         mono_conc_hashtable_insert (coverage_methods, method, method);
3646         mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3647         mono_os_mutex_unlock (&coverage_mutex);
3648
3649         image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3650
3651         if (image_methods == NULL) {
3652                 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3653                 mono_lock_free_queue_init (image_methods);
3654                 mono_os_mutex_lock (&coverage_mutex);
3655                 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3656                 mono_os_mutex_unlock (&coverage_mutex);
3657         }
3658
3659         node = create_method_node (method);
3660         mono_lock_free_queue_enqueue (image_methods, node);
3661
3662         class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3663
3664         if (class_methods == NULL) {
3665                 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3666                 mono_lock_free_queue_init (class_methods);
3667                 mono_os_mutex_lock (&coverage_mutex);
3668                 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3669                 mono_os_mutex_unlock (&coverage_mutex);
3670         }
3671
3672         node = create_method_node (method);
3673         mono_lock_free_queue_enqueue (class_methods, node);
3674
3675         return TRUE;
3676 }
3677
3678 #define LINE_BUFFER_SIZE 4096
3679 /* Max file limit of 128KB */
3680 #define MAX_FILE_SIZE 128 * 1024
3681 static char *
3682 get_file_content (FILE *stream)
3683 {
3684         char *buffer;
3685         ssize_t bytes_read;
3686         long filesize;
3687         int res, offset = 0;
3688
3689         res = fseek (stream, 0, SEEK_END);
3690         if (res < 0)
3691           return NULL;
3692
3693         filesize = ftell (stream);
3694         if (filesize < 0)
3695           return NULL;
3696
3697         res = fseek (stream, 0, SEEK_SET);
3698         if (res < 0)
3699           return NULL;
3700
3701         if (filesize > MAX_FILE_SIZE)
3702           return NULL;
3703
3704         buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3705         while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3706                 offset += bytes_read;
3707
3708         /* NULL terminate our buffer */
3709         buffer[filesize] = '\0';
3710         return buffer;
3711 }
3712
3713 static char *
3714 get_next_line (char *contents, char **next_start)
3715 {
3716         char *p = contents;
3717
3718         if (p == NULL || *p == '\0') {
3719                 *next_start = NULL;
3720                 return NULL;
3721         }
3722
3723         while (*p != '\n' && *p != '\0')
3724                 p++;
3725
3726         if (*p == '\n') {
3727                 *p = '\0';
3728                 *next_start = p + 1;
3729         } else
3730                 *next_start = NULL;
3731
3732         return contents;
3733 }
3734
3735 static void
3736 init_suppressed_assemblies (void)
3737 {
3738         char *content;
3739         char *line;
3740         FILE *sa_file;
3741
3742         suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3743         sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3744         if (sa_file == NULL)
3745                 return;
3746
3747         /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3748         content = get_file_content (sa_file);
3749         if (content == NULL) {
3750                 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3751         }
3752
3753         while ((line = get_next_line (content, &content))) {
3754                 line = g_strchomp (g_strchug (line));
3755                 /* No locking needed as we're doing initialization */
3756                 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3757         }
3758
3759         fclose (sa_file);
3760 }
3761
3762 static void
3763 parse_cov_filter_file (GPtrArray *filters, const char *file)
3764 {
3765         FILE *filter_file;
3766         char *line, *content;
3767
3768         filter_file = fopen (file, "r");
3769         if (filter_file == NULL) {
3770                 fprintf (stderr, "Unable to open %s\n", file);
3771                 return;
3772         }
3773
3774         /* Don't need to free content as it is referred to by the lines stored in @filters */
3775         content = get_file_content (filter_file);
3776         if (content == NULL)
3777                 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3778
3779         while ((line = get_next_line (content, &content)))
3780                 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3781
3782         fclose (filter_file);
3783 }
3784
3785 static void
3786 coverage_init (MonoProfiler *prof)
3787 {
3788         g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3789
3790         COVERAGE_DEBUG(fprintf (stderr, "Coverage initialized\n");)
3791
3792         mono_os_mutex_init (&coverage_mutex);
3793         coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3794         coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3795         coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3796         filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3797         entered_methods = mono_conc_hashtable_new (NULL, NULL);
3798         image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3799         init_suppressed_assemblies ();
3800
3801         coverage_initialized = TRUE;
3802 }
3803
3804 static void
3805 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3806 {
3807         MonoAssembly *assembly = (MonoAssembly *)value;
3808         mono_assembly_close (assembly);
3809 }
3810
3811 static void
3812 free_sample_hit (gpointer p)
3813 {
3814         mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3815 }
3816
3817 static void
3818 cleanup_reusable_samples (MonoProfiler *prof)
3819 {
3820         SampleHit *sample;
3821
3822         while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3823                 mono_thread_hazardous_try_free (sample, free_sample_hit);
3824 }
3825
3826 static void
3827 log_shutdown (MonoProfiler *prof)
3828 {
3829         InterlockedWrite (&in_shutdown, 1);
3830
3831         if (!no_counters)
3832                 counters_and_perfcounters_sample (prof);
3833
3834         dump_coverage (prof);
3835
3836         char c = 1;
3837
3838         if (write (prof->pipes [1], &c, 1) != 1) {
3839                 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3840                 exit (1);
3841         }
3842
3843         mono_native_thread_join (prof->helper_thread);
3844
3845         mono_os_mutex_destroy (&counters_mutex);
3846
3847         MonoCounterAgent *mc_next;
3848
3849         for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3850                 mc_next = cur->next;
3851                 g_free (cur);
3852         }
3853
3854         PerfCounterAgent *pc_next;
3855
3856         for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3857                 pc_next = cur->next;
3858                 g_free (cur);
3859         }
3860
3861         /*
3862          * Ensure that we empty the LLS completely, even if some nodes are
3863          * not immediately removed upon calling mono_lls_remove (), by
3864          * iterating until the head is NULL.
3865          */
3866         while (profiler_thread_list.head) {
3867                 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3868                         g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3869
3870                         remove_thread (thread);
3871                 } MONO_LLS_FOREACH_SAFE_END
3872         }
3873
3874         /*
3875          * Ensure that all threads have been freed, so that we don't miss any
3876          * buffers when we shut down the writer thread below.
3877          */
3878         mono_thread_hazardous_try_free_all ();
3879
3880         InterlockedWrite (&prof->run_dumper_thread, 0);
3881         mono_os_sem_post (&prof->dumper_queue_sem);
3882         mono_native_thread_join (prof->dumper_thread);
3883         mono_os_sem_destroy (&prof->dumper_queue_sem);
3884
3885         InterlockedWrite (&prof->run_writer_thread, 0);
3886         mono_os_sem_post (&prof->writer_queue_sem);
3887         mono_native_thread_join (prof->writer_thread);
3888         mono_os_sem_destroy (&prof->writer_queue_sem);
3889
3890         /*
3891          * Free all writer queue entries, and ensure that all sample hits will be
3892          * added to the sample reuse queue.
3893          */
3894         mono_thread_hazardous_try_free_all ();
3895
3896         cleanup_reusable_samples (prof);
3897
3898         /*
3899          * Finally, make sure that all sample hits are freed. This should cover all
3900          * hazardous data from the profiler. We can now be sure that the runtime
3901          * won't later invoke free functions in the profiler library after it has
3902          * been unloaded.
3903          */
3904         mono_thread_hazardous_try_free_all ();
3905
3906         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why is the reader count still non-zero?");
3907         g_assert (!InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why does someone still hold the exclusive lock?");
3908
3909 #if defined (HAVE_SYS_ZLIB)
3910         if (prof->gzfile)
3911                 gzclose (prof->gzfile);
3912 #endif
3913         if (prof->pipe_output)
3914                 pclose (prof->file);
3915         else
3916                 fclose (prof->file);
3917
3918         mono_conc_hashtable_destroy (prof->method_table);
3919         mono_os_mutex_destroy (&prof->method_table_mutex);
3920
3921         if (coverage_initialized) {
3922                 mono_os_mutex_lock (&coverage_mutex);
3923                 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3924                 mono_os_mutex_unlock (&coverage_mutex);
3925
3926                 mono_conc_hashtable_destroy (coverage_methods);
3927                 mono_conc_hashtable_destroy (coverage_assemblies);
3928                 mono_conc_hashtable_destroy (coverage_classes);
3929                 mono_conc_hashtable_destroy (filtered_classes);
3930
3931                 mono_conc_hashtable_destroy (entered_methods);
3932                 mono_conc_hashtable_destroy (image_to_methods);
3933                 mono_conc_hashtable_destroy (suppressed_assemblies);
3934                 mono_os_mutex_destroy (&coverage_mutex);
3935         }
3936
3937         PROF_TLS_FREE ();
3938
3939         g_free (prof->args);
3940         g_free (prof);
3941 }
3942
3943 static char*
3944 new_filename (const char* filename)
3945 {
3946         time_t t = time (NULL);
3947         int pid = process_id ();
3948         char pid_buf [16];
3949         char time_buf [16];
3950         char *res, *d;
3951         const char *p;
3952         int count_dates = 0;
3953         int count_pids = 0;
3954         int s_date, s_pid;
3955         struct tm *ts;
3956         for (p = filename; *p; p++) {
3957                 if (*p != '%')
3958                         continue;
3959                 p++;
3960                 if (*p == 't')
3961                         count_dates++;
3962                 else if (*p == 'p')
3963                         count_pids++;
3964                 else if (*p == 0)
3965                         break;
3966         }
3967         if (!count_dates && !count_pids)
3968                 return pstrdup (filename);
3969         snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3970         ts = gmtime (&t);
3971         snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3972                 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3973         s_date = strlen (time_buf);
3974         s_pid = strlen (pid_buf);
3975         d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3976         for (p = filename; *p; p++) {
3977                 if (*p != '%') {
3978                         *d++ = *p;
3979                         continue;
3980                 }
3981                 p++;
3982                 if (*p == 't') {
3983                         strcpy (d, time_buf);
3984                         d += s_date;
3985                         continue;
3986                 } else if (*p == 'p') {
3987                         strcpy (d, pid_buf);
3988                         d += s_pid;
3989                         continue;
3990                 } else if (*p == '%') {
3991                         *d++ = '%';
3992                         continue;
3993                 } else if (*p == 0)
3994                         break;
3995                 *d++ = '%';
3996                 *d++ = *p;
3997         }
3998         *d = 0;
3999         return res;
4000 }
4001
4002 static void
4003 add_to_fd_set (fd_set *set, int fd, int *max_fd)
4004 {
4005         /*
4006          * This should only trigger for the basic FDs (server socket, pipes) at
4007          * startup if for some mysterious reason they're too large. In this case,
4008          * the profiler really can't function, and we're better off printing an
4009          * error and exiting.
4010          */
4011         if (fd >= FD_SETSIZE) {
4012                 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4013                 exit (1);
4014         }
4015
4016         FD_SET (fd, set);
4017
4018         if (*max_fd < fd)
4019                 *max_fd = fd;
4020 }
4021
4022 static void *
4023 helper_thread (void *arg)
4024 {
4025         MonoProfiler *prof = (MonoProfiler *) arg;
4026
4027         mono_threads_attach_tools_thread ();
4028         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4029
4030         MonoProfilerThread *thread = init_thread (prof, FALSE);
4031
4032         GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4033
4034         while (1) {
4035                 fd_set rfds;
4036                 int max_fd = -1;
4037
4038                 FD_ZERO (&rfds);
4039
4040                 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4041                 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4042
4043                 for (gint i = 0; i < command_sockets->len; i++)
4044                         add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4045
4046                 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4047
4048                 // Sleep for 1sec or until a file descriptor has data.
4049                 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4050                         if (errno == EINTR)
4051                                 continue;
4052
4053                         fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4054                         exit (1);
4055                 }
4056
4057                 if (!no_counters)
4058                         counters_and_perfcounters_sample (prof);
4059
4060                 buffer_lock_excl ();
4061
4062                 sync_point (SYNC_POINT_PERIODIC);
4063
4064                 buffer_unlock_excl ();
4065
4066                 // Are we shutting down?
4067                 if (FD_ISSET (prof->pipes [0], &rfds)) {
4068                         char c;
4069                         read (prof->pipes [0], &c, 1);
4070                         break;
4071                 }
4072
4073                 for (gint i = 0; i < command_sockets->len; i++) {
4074                         int fd = g_array_index (command_sockets, int, i);
4075
4076                         if (!FD_ISSET (fd, &rfds))
4077                                 continue;
4078
4079                         char buf [64];
4080                         int len = read (fd, buf, sizeof (buf) - 1);
4081
4082                         if (len == -1)
4083                                 continue;
4084
4085                         if (!len) {
4086                                 // The other end disconnected.
4087                                 g_array_remove_index (command_sockets, i);
4088                                 close (fd);
4089
4090                                 continue;
4091                         }
4092
4093                         buf [len] = 0;
4094
4095                         if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4096                                 // Rely on the finalization callback triggering a GC.
4097                                 heapshot_requested = 1;
4098                                 mono_gc_finalize_notify ();
4099                         }
4100                 }
4101
4102                 if (FD_ISSET (prof->server_socket, &rfds)) {
4103                         int fd = accept (prof->server_socket, NULL, NULL);
4104
4105                         if (fd != -1) {
4106                                 if (fd >= FD_SETSIZE)
4107                                         close (fd);
4108                                 else
4109                                         g_array_append_val (command_sockets, fd);
4110                         }
4111                 }
4112         }
4113
4114         for (gint i = 0; i < command_sockets->len; i++)
4115                 close (g_array_index (command_sockets, int, i));
4116
4117         g_array_free (command_sockets, TRUE);
4118
4119         send_log_unsafe (FALSE);
4120         deinit_thread (thread);
4121
4122         mono_thread_info_detach ();
4123
4124         return NULL;
4125 }
4126
4127 static void
4128 start_helper_thread (MonoProfiler* prof)
4129 {
4130         if (pipe (prof->pipes) == -1) {
4131                 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4132                 exit (1);
4133         }
4134
4135         prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4136
4137         if (prof->server_socket == -1) {
4138                 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4139                 exit (1);
4140         }
4141
4142         struct sockaddr_in server_address;
4143
4144         memset (&server_address, 0, sizeof (server_address));
4145         server_address.sin_family = AF_INET;
4146         server_address.sin_addr.s_addr = INADDR_ANY;
4147         server_address.sin_port = htons (prof->command_port);
4148
4149         if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4150                 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4151                 close (prof->server_socket);
4152                 exit (1);
4153         }
4154
4155         if (listen (prof->server_socket, 1) == -1) {
4156                 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4157                 close (prof->server_socket);
4158                 exit (1);
4159         }
4160
4161         socklen_t slen = sizeof (server_address);
4162
4163         if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4164                 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4165                 close (prof->server_socket);
4166                 exit (1);
4167         }
4168
4169         prof->command_port = ntohs (server_address.sin_port);
4170
4171         if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4172                 fprintf (stderr, "Could not start helper thread\n");
4173                 close (prof->server_socket);
4174                 exit (1);
4175         }
4176 }
4177
4178 static void
4179 free_writer_entry (gpointer p)
4180 {
4181         mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4182 }
4183
4184 static gboolean
4185 handle_writer_queue_entry (MonoProfiler *prof)
4186 {
4187         WriterQueueEntry *entry;
4188
4189         if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4190                 if (!entry->methods)
4191                         goto no_methods;
4192
4193                 gboolean wrote_methods = FALSE;
4194
4195                 /*
4196                  * Encode the method events in a temporary log buffer that we
4197                  * flush to disk before the main buffer, ensuring that all
4198                  * methods have metadata emitted before they're referenced.
4199                  *
4200                  * We use a 'proper' thread-local buffer for this as opposed
4201                  * to allocating and freeing a buffer by hand because the call
4202                  * to mono_method_full_name () below may trigger class load
4203                  * events when it retrieves the signature of the method. So a
4204                  * thread-local buffer needs to exist when such events occur.
4205                  */
4206                 for (guint i = 0; i < entry->methods->len; i++) {
4207                         MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4208
4209                         if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4210                                 goto free_info; // This method already has metadata emitted.
4211
4212                         /*
4213                          * Other threads use this hash table to get a general
4214                          * idea of whether a method has already been emitted to
4215                          * the stream. Due to the way we add to this table, it
4216                          * can easily happen that multiple threads queue up the
4217                          * same methods, but that's OK since eventually all
4218                          * methods will be in this table and the thread-local
4219                          * method lists will just be empty for the rest of the
4220                          * app's lifetime.
4221                          */
4222                         mono_os_mutex_lock (&prof->method_table_mutex);
4223                         mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4224                         mono_os_mutex_unlock (&prof->method_table_mutex);
4225
4226                         char *name = mono_method_full_name (info->method, 1);
4227                         int nlen = strlen (name) + 1;
4228                         void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4229                         int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4230
4231                         ENTER_LOG (&method_jits_ctr, logbuffer,
4232                                 EVENT_SIZE /* event */ +
4233                                 LEB128_SIZE /* method */ +
4234                                 LEB128_SIZE /* start */ +
4235                                 LEB128_SIZE /* size */ +
4236                                 nlen /* name */
4237                         );
4238
4239                         emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4240                         emit_method_inner (logbuffer, info->method);
4241                         emit_ptr (logbuffer, cstart);
4242                         emit_value (logbuffer, csize);
4243
4244                         memcpy (logbuffer->cursor, name, nlen);
4245                         logbuffer->cursor += nlen;
4246
4247                         EXIT_LOG_EXPLICIT (NO_SEND);
4248
4249                         mono_free (name);
4250
4251                         wrote_methods = TRUE;
4252
4253                 free_info:
4254                         g_free (info);
4255                 }
4256
4257                 g_ptr_array_free (entry->methods, TRUE);
4258
4259                 if (wrote_methods) {
4260                         dump_buffer_threadless (prof, PROF_TLS_GET ()->buffer);
4261                         init_buffer_state (PROF_TLS_GET ());
4262                 }
4263
4264         no_methods:
4265                 dump_buffer (prof, entry->buffer);
4266
4267                 mono_thread_hazardous_try_free (entry, free_writer_entry);
4268
4269                 return TRUE;
4270         }
4271
4272         return FALSE;
4273 }
4274
4275 static void *
4276 writer_thread (void *arg)
4277 {
4278         MonoProfiler *prof = (MonoProfiler *)arg;
4279
4280         mono_threads_attach_tools_thread ();
4281         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4282
4283         dump_header (prof);
4284
4285         MonoProfilerThread *thread = init_thread (prof, FALSE);
4286
4287         while (InterlockedRead (&prof->run_writer_thread)) {
4288                 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4289                 handle_writer_queue_entry (prof);
4290         }
4291
4292         /* Drain any remaining entries on shutdown. */
4293         while (handle_writer_queue_entry (prof));
4294
4295         free_buffer (thread->buffer, thread->buffer->size);
4296         deinit_thread (thread);
4297
4298         mono_thread_info_detach ();
4299
4300         return NULL;
4301 }
4302
4303 static void
4304 start_writer_thread (MonoProfiler* prof)
4305 {
4306         InterlockedWrite (&prof->run_writer_thread, 1);
4307
4308         if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4309                 fprintf (stderr, "Could not start writer thread\n");
4310                 exit (1);
4311         }
4312 }
4313
4314 static void
4315 reuse_sample_hit (gpointer p)
4316 {
4317         SampleHit *sample = p;
4318
4319         mono_lock_free_queue_node_unpoison (&sample->node);
4320         mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4321 }
4322
4323 static gboolean
4324 handle_dumper_queue_entry (MonoProfiler *prof)
4325 {
4326         SampleHit *sample;
4327
4328         if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4329                 for (int i = 0; i < sample->count; ++i) {
4330                         MonoMethod *method = sample->frames [i].method;
4331                         MonoDomain *domain = sample->frames [i].domain;
4332                         void *address = sample->frames [i].base_address;
4333
4334                         if (!method) {
4335                                 g_assert (domain && "What happened to the domain pointer?");
4336                                 g_assert (address && "What happened to the instruction pointer?");
4337
4338                                 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4339
4340                                 if (ji)
4341                                         sample->frames [i].method = mono_jit_info_get_method (ji);
4342                         }
4343                 }
4344
4345                 ENTER_LOG (&sample_hits_ctr, logbuffer,
4346                         EVENT_SIZE /* event */ +
4347                         BYTE_SIZE /* type */ +
4348                         LEB128_SIZE /* tid */ +
4349                         LEB128_SIZE /* count */ +
4350                         1 * (
4351                                 LEB128_SIZE /* ip */
4352                         ) +
4353                         LEB128_SIZE /* managed count */ +
4354                         sample->count * (
4355                                 LEB128_SIZE /* method */
4356                         )
4357                 );
4358
4359                 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4360                 emit_byte (logbuffer, SAMPLE_CYCLES);
4361                 emit_ptr (logbuffer, (void *) sample->tid);
4362                 emit_value (logbuffer, 1);
4363
4364                 // TODO: Actual native unwinding.
4365                 for (int i = 0; i < 1; ++i) {
4366                         emit_ptr (logbuffer, sample->ip);
4367                         add_code_pointer ((uintptr_t) sample->ip);
4368                 }
4369
4370                 /* new in data version 6 */
4371                 emit_uvalue (logbuffer, sample->count);
4372
4373                 for (int i = 0; i < sample->count; ++i)
4374                         emit_method (logbuffer, sample->frames [i].method);
4375
4376                 EXIT_LOG_EXPLICIT (DO_SEND);
4377
4378                 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4379
4380                 dump_unmanaged_coderefs (prof);
4381         }
4382
4383         return FALSE;
4384 }
4385
4386 static void *
4387 dumper_thread (void *arg)
4388 {
4389         MonoProfiler *prof = (MonoProfiler *)arg;
4390
4391         mono_threads_attach_tools_thread ();
4392         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4393
4394         MonoProfilerThread *thread = init_thread (prof, FALSE);
4395
4396         while (InterlockedRead (&prof->run_dumper_thread)) {
4397                 mono_os_sem_wait (&prof->dumper_queue_sem, MONO_SEM_FLAGS_NONE);
4398                 handle_dumper_queue_entry (prof);
4399         }
4400
4401         /* Drain any remaining entries on shutdown. */
4402         while (handle_dumper_queue_entry (prof));
4403
4404         send_log_unsafe (FALSE);
4405         deinit_thread (thread);
4406
4407         mono_thread_info_detach ();
4408
4409         return NULL;
4410 }
4411
4412 static void
4413 start_dumper_thread (MonoProfiler* prof)
4414 {
4415         InterlockedWrite (&prof->run_dumper_thread, 1);
4416
4417         if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4418                 fprintf (stderr, "Could not start dumper thread\n");
4419                 exit (1);
4420         }
4421 }
4422
4423 static void
4424 register_counter (const char *name, gint32 *counter)
4425 {
4426         mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4427 }
4428
4429 static void
4430 runtime_initialized (MonoProfiler *profiler)
4431 {
4432         InterlockedWrite (&runtime_inited, 1);
4433
4434         register_counter ("Sample events allocated", &sample_allocations_ctr);
4435         register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4436
4437         register_counter ("Event: Sync points", &sync_points_ctr);
4438         register_counter ("Event: Heap objects", &heap_objects_ctr);
4439         register_counter ("Event: Heap starts", &heap_starts_ctr);
4440         register_counter ("Event: Heap ends", &heap_ends_ctr);
4441         register_counter ("Event: Heap roots", &heap_roots_ctr);
4442         register_counter ("Event: GC events", &gc_events_ctr);
4443         register_counter ("Event: GC resizes", &gc_resizes_ctr);
4444         register_counter ("Event: GC allocations", &gc_allocs_ctr);
4445         register_counter ("Event: GC moves", &gc_moves_ctr);
4446         register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4447         register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4448         register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4449         register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4450         register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4451         register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4452         register_counter ("Event: Image loads", &image_loads_ctr);
4453         register_counter ("Event: Image unloads", &image_unloads_ctr);
4454         register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4455         register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4456         register_counter ("Event: Class loads", &class_loads_ctr);
4457         register_counter ("Event: Class unloads", &class_unloads_ctr);
4458         register_counter ("Event: Method entries", &method_entries_ctr);
4459         register_counter ("Event: Method exits", &method_exits_ctr);
4460         register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4461         register_counter ("Event: Method JITs", &method_jits_ctr);
4462         register_counter ("Event: Code buffers", &code_buffers_ctr);
4463         register_counter ("Event: Exception throws", &exception_throws_ctr);
4464         register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4465         register_counter ("Event: Monitor contentions", &monitor_contentions_ctr);
4466         register_counter ("Event: Monitor acquisitions", &monitor_acquisitions_ctr);
4467         register_counter ("Event: Monitor failures", &monitor_failures_ctr);
4468         register_counter ("Event: Thread starts", &thread_starts_ctr);
4469         register_counter ("Event: Thread ends", &thread_ends_ctr);
4470         register_counter ("Event: Thread names", &thread_names_ctr);
4471         register_counter ("Event: Domain loads", &domain_loads_ctr);
4472         register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4473         register_counter ("Event: Domain names", &domain_names_ctr);
4474         register_counter ("Event: Context loads", &context_loads_ctr);
4475         register_counter ("Event: Context unloads", &context_unloads_ctr);
4476         register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4477         register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4478         register_counter ("Event: Sample hits", &sample_hits_ctr);
4479         register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4480         register_counter ("Event: Counter samples", &counter_samples_ctr);
4481         register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4482         register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4483         register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4484         register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4485         register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4486         register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4487
4488         counters_init (profiler);
4489
4490         /*
4491          * We must start the helper thread before the writer thread. This is
4492          * because the helper thread sets up the command port which is written to
4493          * the log header by the writer thread.
4494          */
4495         start_helper_thread (profiler);
4496         start_writer_thread (profiler);
4497         start_dumper_thread (profiler);
4498 }
4499
4500 static MonoProfiler*
4501 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4502 {
4503         MonoProfiler *prof;
4504         char *nf;
4505         int force_delete = 0;
4506         prof = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4507
4508         prof->args = pstrdup (args);
4509         prof->command_port = command_port;
4510         if (filename && *filename == '-') {
4511                 force_delete = 1;
4512                 filename++;
4513                 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4514         }
4515         if (!filename) {
4516                 if (do_report)
4517                         filename = "|mprof-report -";
4518                 else
4519                         filename = "output.mlpd";
4520                 nf = (char*)filename;
4521         } else {
4522                 nf = new_filename (filename);
4523                 if (do_report) {
4524                         int s = strlen (nf) + 32;
4525                         char *p = (char *) g_malloc (s);
4526                         snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4527                         g_free (nf);
4528                         nf = p;
4529                 }
4530         }
4531         if (*nf == '|') {
4532                 prof->file = popen (nf + 1, "w");
4533                 prof->pipe_output = 1;
4534         } else if (*nf == '#') {
4535                 int fd = strtol (nf + 1, NULL, 10);
4536                 prof->file = fdopen (fd, "a");
4537         } else {
4538                 if (force_delete)
4539                         unlink (nf);
4540                 prof->file = fopen (nf, "wb");
4541         }
4542         if (!prof->file) {
4543                 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4544                 exit (1);
4545         }
4546
4547 #if defined (HAVE_SYS_ZLIB)
4548         if (use_zip)
4549                 prof->gzfile = gzdopen (fileno (prof->file), "wb");
4550 #endif
4551
4552         /*
4553          * If you hit this assert while increasing MAX_FRAMES, you need to increase
4554          * SAMPLE_BLOCK_SIZE as well.
4555          */
4556         g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4557
4558         // FIXME: We should free this stuff too.
4559         mono_lock_free_allocator_init_size_class (&prof->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4560         mono_lock_free_allocator_init_allocator (&prof->sample_allocator, &prof->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4561
4562         mono_lock_free_queue_init (&prof->sample_reuse_queue);
4563
4564         g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4565
4566         // FIXME: We should free this stuff too.
4567         mono_lock_free_allocator_init_size_class (&prof->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4568         mono_lock_free_allocator_init_allocator (&prof->writer_entry_allocator, &prof->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4569
4570         mono_lock_free_queue_init (&prof->writer_queue);
4571         mono_os_sem_init (&prof->writer_queue_sem, 0);
4572
4573         mono_lock_free_queue_init (&prof->dumper_queue);
4574         mono_os_sem_init (&prof->dumper_queue_sem, 0);
4575
4576         mono_os_mutex_init (&prof->method_table_mutex);
4577         prof->method_table = mono_conc_hashtable_new (NULL, NULL);
4578
4579         if (do_coverage)
4580                 coverage_init (prof);
4581         prof->coverage_filters = filters;
4582
4583         prof->startup_time = current_time ();
4584         return prof;
4585 }
4586
4587 /*
4588  * declaration to silence the compiler: this is the entry point that
4589  * mono will load from the shared library and call.
4590  */
4591 extern void
4592 mono_profiler_startup (const char *desc);
4593
4594 extern void
4595 mono_profiler_startup_log (const char *desc);
4596
4597 /*
4598  * this is the entry point that will be used when the profiler
4599  * is embedded inside the main executable.
4600  */
4601 void
4602 mono_profiler_startup_log (const char *desc)
4603 {
4604         mono_profiler_startup (desc);
4605 }
4606
4607 void
4608 mono_profiler_startup (const char *desc)
4609 {
4610         GPtrArray *filters = NULL;
4611         MonoProfiler *prof;
4612
4613         proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4614
4615         //XXX maybe later cleanup to use config directly
4616         nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4617         no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4618         do_report = config.do_report;
4619         do_debug = config.do_debug;
4620         do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4621         hs_mode_ondemand = config.hs_mode_ondemand;
4622         hs_mode_ms = config.hs_mode_ms;
4623         hs_mode_gc = config.hs_mode_gc;
4624         do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4625         use_zip = config.use_zip;
4626         command_port = config.command_port;
4627         num_frames = config.num_frames;
4628         notraces = config.notraces;
4629         max_allocated_sample_hits = config.max_allocated_sample_hits;
4630         max_call_depth = config.max_call_depth;
4631         do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4632         debug_coverage = config.debug_coverage;
4633         only_coverage = config.only_coverage;
4634
4635         if (config.cov_filter_files) {
4636                 filters = g_ptr_array_new ();
4637                 int i;
4638                 for (i = 0; i < config.cov_filter_files->len; ++i) {
4639                         const char *name = config.cov_filter_files->pdata [i];
4640                         parse_cov_filter_file (filters, name);
4641                 }
4642         }
4643
4644         init_time ();
4645
4646         PROF_TLS_INIT ();
4647
4648         prof = create_profiler (desc, config.output_filename, filters);
4649         if (!prof) {
4650                 PROF_TLS_FREE ();
4651                 return;
4652         }
4653
4654         mono_lls_init (&profiler_thread_list, NULL);
4655
4656         init_thread (prof, TRUE);
4657
4658         //This two events are required for the profiler to work
4659         int events = MONO_PROFILE_THREADS | MONO_PROFILE_GC;
4660
4661         //Required callbacks
4662         mono_profiler_install (prof, log_shutdown);
4663         mono_profiler_install_runtime_initialized (runtime_initialized);
4664
4665         mono_profiler_install_gc (gc_event, gc_resize);
4666         mono_profiler_install_thread (thread_start, thread_end);
4667
4668         //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4669         mono_profiler_install_thread_name (thread_name);
4670
4671
4672         if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4673                 events |= MONO_PROFILE_APPDOMAIN_EVENTS;
4674                 mono_profiler_install_appdomain (NULL, domain_loaded, domain_unloaded, NULL);
4675                 mono_profiler_install_appdomain_name (domain_name);
4676         }
4677
4678         if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4679                 events |= MONO_PROFILE_ASSEMBLY_EVENTS;
4680                 mono_profiler_install_assembly (NULL, assembly_loaded, assembly_unloaded, NULL);
4681         }
4682
4683         if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4684                 events |= MONO_PROFILE_MODULE_EVENTS;
4685                 mono_profiler_install_module (NULL, image_loaded, image_unloaded, NULL);
4686         }
4687
4688         if (config.effective_mask & PROFLOG_CLASS_EVENTS) {
4689                 events |= MONO_PROFILE_CLASS_EVENTS;
4690                 mono_profiler_install_class (NULL, class_loaded, class_unloaded, NULL);
4691         }
4692
4693         if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4694                 events |= MONO_PROFILE_JIT_COMPILATION;
4695                 mono_profiler_install_jit_end (method_jitted);
4696                 mono_profiler_install_code_buffer_new (code_buffer_new);
4697         }
4698
4699         if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4700                 events |= MONO_PROFILE_EXCEPTIONS;
4701                 mono_profiler_install_exception (throw_exc, method_exc_leave, clause_exc);
4702         }
4703
4704         if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4705                 events |= MONO_PROFILE_ALLOCATIONS;
4706                 mono_profiler_install_allocation (gc_alloc);
4707         }
4708
4709         //PROFLOG_GC_EVENTS is mandatory
4710         //PROFLOG_THREAD_EVENTS is mandatory
4711
4712         if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4713                 events |= MONO_PROFILE_ENTER_LEAVE;
4714                 mono_profiler_install_enter_leave (method_enter, method_leave);
4715         }
4716
4717         if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS) {
4718                 events |= MONO_PROFILE_INS_COVERAGE;
4719                 mono_profiler_install_coverage_filter (coverage_filter);
4720         }
4721
4722         //XXX should we check for PROFLOG_SAMPLING_FEATURE instead??
4723         if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4724                 events |= MONO_PROFILE_STATISTICAL;
4725                 mono_profiler_set_statistical_mode (config.sampling_mode, config.sample_freq);
4726                 mono_profiler_install_statistical (mono_sample_hit);
4727         }
4728
4729         if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4730                 events |= MONO_PROFILE_MONITOR_EVENTS;
4731                 mono_profiler_install_monitor (monitor_event);
4732         }
4733
4734         if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS) {
4735                 events |= MONO_PROFILE_GC_MOVES;
4736                 mono_profiler_install_gc_moves (gc_moves);
4737         }
4738
4739         // TODO split those in two profiler events
4740         if (config.effective_mask & (PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_HANDLE_EVENTS)) {
4741                 events |= MONO_PROFILE_GC_ROOTS;
4742                 mono_profiler_install_gc_roots (
4743                         config.effective_mask & (PROFLOG_GC_HANDLE_EVENTS) ? gc_handle : NULL,
4744                         (config.effective_mask & PROFLOG_GC_ROOT_EVENTS) ? gc_roots : NULL);
4745         }
4746
4747         if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4748                 events |= MONO_PROFILE_CONTEXT_EVENTS;
4749                 mono_profiler_install_context (context_loaded, context_unloaded);
4750         }
4751
4752         if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4753                 events |= MONO_PROFILE_GC_FINALIZATION;
4754                 mono_profiler_install_gc_finalize (finalize_begin, finalize_object_begin, finalize_object_end, finalize_end);
4755         } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4756                 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4757                 events |= MONO_PROFILE_GC_FINALIZATION;
4758                 mono_profiler_install_gc_finalize (NULL, NULL, NULL, finalize_end);
4759         }
4760
4761         //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4762         //PROFLOG_GC_HANDLE_EVENTS is handled together with PROFLOG_GC_ROOT_EVENTS
4763
4764         mono_profiler_set_events ((MonoProfileFlags)events);
4765 }