mono/profiler/log.c

   1 /*
   2  * mono-profiler-log.c: mono log profiler
   3  *
   4  * Authors:
   5  *   Paolo Molaro (lupus@ximian.com)
   6  *   Alex Rønne Petersen (alexrp@xamarin.com)
   7  *
   8  * Copyright 2010 Novell, Inc (http://www.novell.com)
   9  * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
  10  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  11  */
  12
  13 #include <config.h>
  14 #include <mono/metadata/assembly.h>
  15 #include <mono/metadata/debug-helpers.h>
  16 #include "../metadata/metadata-internals.h"
  17 #include <mono/metadata/mono-config.h>
  18 #include <mono/metadata/mono-gc.h>
  19 #include <mono/metadata/mono-perfcounters.h>
  20 #include <mono/utils/atomic.h>
  21 #include <mono/utils/hazard-pointer.h>
  22 #include <mono/utils/lock-free-alloc.h>
  23 #include <mono/utils/lock-free-queue.h>
  24 #include <mono/utils/mono-conc-hashtable.h>
  25 #include <mono/utils/mono-counters.h>
  26 #include <mono/utils/mono-linked-list-set.h>
  27 #include <mono/utils/mono-membar.h>
  28 #include <mono/utils/mono-mmap.h>
  29 #include <mono/utils/mono-os-mutex.h>
  30 #include <mono/utils/mono-os-semaphore.h>
  31 #include <mono/utils/mono-threads.h>
  32 #include <mono/utils/mono-threads-api.h>
  33 #include "log.h"
  34
  35 #ifdef HAVE_DLFCN_H
  36 #include <dlfcn.h>
  37 #endif
  38 #include <fcntl.h>
  39 #ifdef HAVE_LINK_H
  40 #include <link.h>
  41 #endif
  42 #ifdef HAVE_UNISTD_H
  43 #include <unistd.h>
  44 #endif
  45 #if defined(__APPLE__)
  46 #include <mach/mach_time.h>
  47 #endif
  48 #include <netinet/in.h>
  49 #ifdef HAVE_SYS_MMAN_H
  50 #include <sys/mman.h>
  51 #endif
  52 #include <sys/socket.h>
  53 #if defined (HAVE_SYS_ZLIB)
  54 #include <zlib.h>
  55 #endif
  56
  57 #define BUFFER_SIZE (4096 * 16)
  58
  59 /* Worst-case size in bytes of a 64-bit value encoded with LEB128. */
  60 #define LEB128_SIZE 10
  61
  62 /* Size of a value encoded as a single byte. */
  63 #undef BYTE_SIZE // mach/i386/vm_param.h on OS X defines this to 8, but it isn't used for anything.
  64 #define BYTE_SIZE 1
  65
  66 /* Size in bytes of the event prefix (ID + time). */
  67 #define EVENT_SIZE (BYTE_SIZE + LEB128_SIZE)
  68
  69 static volatile gint32 runtime_inited;
  70 static volatile gint32 in_shutdown;
  71
  72 static ProfilerConfig config;
  73 static int nocalls = 0;
  74 static int notraces = 0;
  75 static int use_zip = 0;
  76 static int do_report = 0;
  77 static int do_heap_shot = 0;
  78 static int max_call_depth = 0;
  79 static int command_port = 0;
  80 static int heapshot_requested = 0;
  81 static int do_mono_sample = 0;
  82 static int do_debug = 0;
  83 static int do_coverage = 0;
  84 static gboolean no_counters = FALSE;
  85 static gboolean only_coverage = FALSE;
  86 static gboolean debug_coverage = FALSE;
  87 static int max_allocated_sample_hits;
  88
  89 #define ENABLED(EVT) (config.effective_mask & (EVT))
  90
  91 // Statistics for internal profiler data structures.
  92 static gint32 sample_allocations_ctr,
  93               buffer_allocations_ctr;
  94
  95 // Statistics for profiler events.
  96 static gint32 sync_points_ctr,
  97               heap_objects_ctr,
  98               heap_starts_ctr,
  99               heap_ends_ctr,
 100               heap_roots_ctr,
 101               gc_events_ctr,
 102               gc_resizes_ctr,
 103               gc_allocs_ctr,
 104               gc_moves_ctr,
 105               gc_handle_creations_ctr,
 106               gc_handle_deletions_ctr,
 107               finalize_begins_ctr,
 108               finalize_ends_ctr,
 109               finalize_object_begins_ctr,
 110               finalize_object_ends_ctr,
 111               image_loads_ctr,
 112               image_unloads_ctr,
 113               assembly_loads_ctr,
 114               assembly_unloads_ctr,
 115               class_loads_ctr,
 116               class_unloads_ctr,
 117               method_entries_ctr,
 118               method_exits_ctr,
 119               method_exception_exits_ctr,
 120               method_jits_ctr,
 121               code_buffers_ctr,
 122               exception_throws_ctr,
 123               exception_clauses_ctr,
 124               monitor_events_ctr,
 125               thread_starts_ctr,
 126               thread_ends_ctr,
 127               thread_names_ctr,
 128               domain_loads_ctr,
 129               domain_unloads_ctr,
 130               domain_names_ctr,
 131               context_loads_ctr,
 132               context_unloads_ctr,
 133               sample_ubins_ctr,
 134               sample_usyms_ctr,
 135               sample_hits_ctr,
 136               counter_descriptors_ctr,
 137               counter_samples_ctr,
 138               perfcounter_descriptors_ctr,
 139               perfcounter_samples_ctr,
 140               coverage_methods_ctr,
 141               coverage_statements_ctr,
 142               coverage_classes_ctr,
 143               coverage_assemblies_ctr;
 144
 145 static MonoLinkedListSet profiler_thread_list;
 146
 147 /*
 148  * file format:
 149  * [header] [buffer]*
 150  *
 151  * The file is composed by a header followed by 0 or more buffers.
 152  * Each buffer contains events that happened on a thread: for a given thread
 153  * buffers that appear later in the file are guaranteed to contain events
 154  * that happened later in time. Buffers from separate threads could be interleaved,
 155  * though.
 156  * Buffers are not required to be aligned.
 157  *
 158  * header format:
 159  * [id: 4 bytes] constant value: LOG_HEADER_ID
 160  * [major: 1 byte] [minor: 1 byte] major and minor version of the log profiler
 161  * [format: 1 byte] version of the data format for the rest of the file
 162  * [ptrsize: 1 byte] size in bytes of a pointer in the profiled program
 163  * [startup time: 8 bytes] time in milliseconds since the unix epoch when the program started
 164  * [timer overhead: 4 bytes] approximate overhead in nanoseconds of the timer
 165  * [flags: 4 bytes] file format flags, should be 0 for now
 166  * [pid: 4 bytes] pid of the profiled process
 167  * [port: 2 bytes] tcp port for server if != 0
 168  * [args size: 4 bytes] size of args
 169  * [args: string] arguments passed to the profiler
 170  * [arch size: 4 bytes] size of arch
 171  * [arch: string] architecture the profiler is running on
 172  * [os size: 4 bytes] size of os
 173  * [os: string] operating system the profiler is running on
 174  *
 175  * The multiple byte integers are in little-endian format.
 176  *
 177  * buffer format:
 178  * [buffer header] [event]*
 179  * Buffers have a fixed-size header followed by 0 or more bytes of event data.
 180  * Timing information and other values in the event data are usually stored
 181  * as uleb128 or sleb128 integers. To save space, as noted for each item below,
 182  * some data is represented as a difference between the actual value and
 183  * either the last value of the same type (like for timing information) or
 184  * as the difference from a value stored in a buffer header.
 185  *
 186  * For timing information the data is stored as uleb128, since timing
 187  * increases in a monotonic way in each thread: the value is the number of
 188  * nanoseconds to add to the last seen timing data in a buffer. The first value
 189  * in a buffer will be calculated from the time_base field in the buffer head.
 190  *
 191  * Object or heap sizes are stored as uleb128.
 192  * Pointer differences are stored as sleb128, instead.
 193  *
 194  * If an unexpected value is found, the rest of the buffer should be ignored,
 195  * as generally the later values need the former to be interpreted correctly.
 196  *
 197  * buffer header format:
 198  * [bufid: 4 bytes] constant value: BUF_ID
 199  * [len: 4 bytes] size of the data following the buffer header
 200  * [time_base: 8 bytes] time base in nanoseconds since an unspecified epoch
 201  * [ptr_base: 8 bytes] base value for pointers
 202  * [obj_base: 8 bytes] base value for object addresses
 203  * [thread id: 8 bytes] system-specific thread ID (pthread_t for example)
 204  * [method_base: 8 bytes] base value for MonoMethod pointers
 205  *
 206  * event format:
 207  * [extended info: upper 4 bits] [type: lower 4 bits]
 208  * [time diff: uleb128] nanoseconds since last timing
 209  * [data]*
 210  * The data that follows depends on type and the extended info.
 211  * Type is one of the enum values in mono-profiler-log.h: TYPE_ALLOC, TYPE_GC,
 212  * TYPE_METADATA, TYPE_METHOD, TYPE_EXCEPTION, TYPE_MONITOR, TYPE_HEAP.
 213  * The extended info bits are interpreted based on type, see
 214  * each individual event description below.
 215  * strings are represented as a 0-terminated utf8 sequence.
 216  *
 217  * backtrace format:
 218  * [num: uleb128] number of frames following
 219  * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
 220  * pointer or the buffer method_base
 221  *
 222  * type alloc format:
 223  * type: TYPE_ALLOC
 224  * exinfo: zero or TYPE_ALLOC_BT
 225  * [ptr: sleb128] class as a byte difference from ptr_base
 226  * [obj: sleb128] object address as a byte difference from obj_base
 227  * [size: uleb128] size of the object in the heap
 228  * If exinfo == TYPE_ALLOC_BT, a backtrace follows.
 229  *
 230  * type GC format:
 231  * type: TYPE_GC
 232  * exinfo: one of TYPE_GC_EVENT, TYPE_GC_RESIZE, TYPE_GC_MOVE, TYPE_GC_HANDLE_CREATED[_BT],
 233  * TYPE_GC_HANDLE_DESTROYED[_BT], TYPE_GC_FINALIZE_START, TYPE_GC_FINALIZE_END,
 234  * TYPE_GC_FINALIZE_OBJECT_START, TYPE_GC_FINALIZE_OBJECT_END
 235  * if exinfo == TYPE_GC_RESIZE
 236  *      [heap_size: uleb128] new heap size
 237  * if exinfo == TYPE_GC_EVENT
 238  *      [event type: byte] GC event (MONO_GC_EVENT_* from profiler.h)
 239  *      [generation: byte] GC generation event refers to
 240  * if exinfo == TYPE_GC_MOVE
 241  *      [num_objects: uleb128] number of object moves that follow
 242  *      [objaddr: sleb128]+ num_objects object pointer differences from obj_base
 243  *      num is always an even number: the even items are the old
 244  *      addresses, the odd numbers are the respective new object addresses
 245  * if exinfo == TYPE_GC_HANDLE_CREATED[_BT]
 246  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 247  *      upper bits reserved as flags
 248  *      [handle: uleb128] GC handle value
 249  *      [objaddr: sleb128] object pointer differences from obj_base
 250  *      If exinfo == TYPE_GC_HANDLE_CREATED_BT, a backtrace follows.
 251  * if exinfo == TYPE_GC_HANDLE_DESTROYED[_BT]
 252  *      [handle_type: uleb128] GC handle type (System.Runtime.InteropServices.GCHandleType)
 253  *      upper bits reserved as flags
 254  *      [handle: uleb128] GC handle value
 255  *      If exinfo == TYPE_GC_HANDLE_DESTROYED_BT, a backtrace follows.
 256  * if exinfo == TYPE_GC_FINALIZE_OBJECT_{START,END}
 257  *      [object: sleb128] the object as a difference from obj_base
 258  *
 259  * type metadata format:
 260  * type: TYPE_METADATA
 261  * exinfo: one of: TYPE_END_LOAD, TYPE_END_UNLOAD (optional for TYPE_THREAD and TYPE_DOMAIN)
 262  * [mtype: byte] metadata type, one of: TYPE_CLASS, TYPE_IMAGE, TYPE_ASSEMBLY, TYPE_DOMAIN,
 263  * TYPE_THREAD, TYPE_CONTEXT
 264  * [pointer: sleb128] pointer of the metadata type depending on mtype
 265  * if mtype == TYPE_CLASS
 266  *      [image: sleb128] MonoImage* as a pointer difference from ptr_base
 267  *      [name: string] full class name
 268  * if mtype == TYPE_IMAGE
 269  *      [name: string] image file name
 270  * if mtype == TYPE_ASSEMBLY
 271  *      [image: sleb128] MonoImage* as a pointer difference from ptr_base
 272  *      [name: string] assembly name
 273  * if mtype == TYPE_DOMAIN && exinfo == 0
 274  *      [name: string] domain friendly name
 275  * if mtype == TYPE_CONTEXT
 276  *      [domain: sleb128] domain id as pointer
 277  * if mtype == TYPE_THREAD && exinfo == 0
 278  *      [name: string] thread name
 279  *
 280  * type method format:
 281  * type: TYPE_METHOD
 282  * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
 283  * [method: sleb128] MonoMethod* as a pointer difference from the last such
 284  * pointer or the buffer method_base
 285  * if exinfo == TYPE_JIT
 286  *      [code address: sleb128] pointer to the native code as a diff from ptr_base
 287  *      [code size: uleb128] size of the generated code
 288  *      [name: string] full method name
 289  *
 290  * type exception format:
 291  * type: TYPE_EXCEPTION
 292  * exinfo: zero, TYPE_CLAUSE, or TYPE_THROW_BT
 293  * if exinfo == TYPE_CLAUSE
 294  *      [clause type: byte] MonoExceptionEnum enum value
 295  *      [clause index: uleb128] index of the current clause
 296  *      [method: sleb128] MonoMethod* as a pointer difference from the last such
 297  *      pointer or the buffer method_base
 298  *      [object: sleb128] the exception object as a difference from obj_base
 299  * else
 300  *      [object: sleb128] the exception object as a difference from obj_base
 301  *      If exinfo == TYPE_THROW_BT, 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: zero or TYPE_MONITOR_BT
 316  * [type: byte] MONO_PROFILER_MONITOR_{CONTENTION,FAIL,DONE}
 317  * [object: sleb128] the lock object as a difference from obj_base
 318  * If exinfo == TYPE_MONITOR_BT, 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 as a difference from ptr_base
 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: byte] 0 -> value is null
 382  *                      else:
 383  *                              [1: byte] 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
 562  * take care of a bunch of stuff that can be repetitive and error-prone, such
 563  * as attaching the current thread, acquiring/releasing the buffer lock,
 564  * incrementing the event counter, expanding the log buffer, etc. They also
 565  * create a scope so that it's harder to leak the LogBuffer pointer, which can
 566  * be problematic as the pointer is unstable when the buffer lock isn't
 567  * acquired.
 568  *
 569  * If the calling thread is already attached, these macros will not alter its
 570  * attach mode (i.e. whether it's added to the LLS). If the thread is not
 571  * attached, init_thread () will be called with add_to_lls = TRUE.
 572  */
 573
 574 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
 575         do { \
 576                 MonoProfilerThread *thread__ = get_thread (); \
 577                 if (thread__->attached) \
 578                         buffer_lock (); \
 579                 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
 580                 thread__->busy = TRUE; \
 581                 InterlockedIncrement ((COUNTER)); \
 582                 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
 583
 584 #define EXIT_LOG_EXPLICIT(SEND) \
 585                 thread__->busy = FALSE; \
 586                 if ((SEND)) \
 587                         send_log_unsafe (TRUE); \
 588                 if (thread__->attached) \
 589                         buffer_unlock (); \
 590         } while (0)
 591
 592 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
 593 #define DO_SEND TRUE
 594 #define NO_SEND FALSE
 595
 596 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
 597
 598 static volatile gint32 buffer_rwlock_count;
 599 static volatile gpointer buffer_rwlock_exclusive;
 600
 601 // Can be used recursively.
 602 static void
 603 buffer_lock (void)
 604 {
 605         /*
 606          * If the thread holding the exclusive lock tries to modify the
 607          * reader count, just make it a no-op. This way, we also avoid
 608          * invoking the GC safe point macros below, which could break if
 609          * done from a thread that is currently the initiator of STW.
 610          *
 611          * In other words, we rely on the fact that the GC thread takes
 612          * the exclusive lock in the gc_event () callback when the world
 613          * is about to stop.
 614          */
 615         if (InterlockedReadPointer (&buffer_rwlock_exclusive) != (gpointer) thread_id ()) {
 616                 MONO_ENTER_GC_SAFE;
 617
 618                 while (InterlockedReadPointer (&buffer_rwlock_exclusive))
 619                         mono_thread_info_yield ();
 620
 621                 InterlockedIncrement (&buffer_rwlock_count);
 622
 623                 MONO_EXIT_GC_SAFE;
 624         }
 625
 626         mono_memory_barrier ();
 627 }
 628
 629 static void
 630 buffer_unlock (void)
 631 {
 632         mono_memory_barrier ();
 633
 634         // See the comment in buffer_lock ().
 635         if (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id ())
 636                 return;
 637
 638         g_assert (InterlockedRead (&buffer_rwlock_count) && "Why are we trying to decrement a zero reader count?");
 639
 640         InterlockedDecrement (&buffer_rwlock_count);
 641 }
 642
 643 // Cannot be used recursively.
 644 static void
 645 buffer_lock_excl (void)
 646 {
 647         gpointer tid = (gpointer) thread_id ();
 648
 649         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) != tid && "Why are we taking the exclusive lock twice?");
 650
 651         MONO_ENTER_GC_SAFE;
 652
 653         while (InterlockedCompareExchangePointer (&buffer_rwlock_exclusive, tid, 0))
 654                 mono_thread_info_yield ();
 655
 656         while (InterlockedRead (&buffer_rwlock_count))
 657                 mono_thread_info_yield ();
 658
 659         MONO_EXIT_GC_SAFE;
 660
 661         mono_memory_barrier ();
 662 }
 663
 664 static void
 665 buffer_unlock_excl (void)
 666 {
 667         mono_memory_barrier ();
 668
 669         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why is the exclusive lock not held?");
 670         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why does another thread hold the exclusive lock?");
 671         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why are there readers when the exclusive lock is held?");
 672
 673         InterlockedWritePointer (&buffer_rwlock_exclusive, NULL);
 674 }
 675
 676 typedef struct _BinaryObject BinaryObject;
 677 struct _BinaryObject {
 678         BinaryObject *next;
 679         void *addr;
 680         char *name;
 681 };
 682
 683 static MonoProfiler *log_profiler;
 684
 685 struct _MonoProfiler {
 686         FILE* file;
 687 #if defined (HAVE_SYS_ZLIB)
 688         gzFile gzfile;
 689 #endif
 690         char *args;
 691         uint64_t startup_time;
 692         int pipe_output;
 693         int command_port;
 694         int server_socket;
 695         int pipes [2];
 696         MonoNativeThreadId helper_thread;
 697         MonoNativeThreadId writer_thread;
 698         MonoNativeThreadId dumper_thread;
 699         volatile gint32 run_writer_thread;
 700         MonoLockFreeAllocSizeClass writer_entry_size_class;
 701         MonoLockFreeAllocator writer_entry_allocator;
 702         MonoLockFreeQueue writer_queue;
 703         MonoSemType writer_queue_sem;
 704         MonoConcurrentHashTable *method_table;
 705         mono_mutex_t method_table_mutex;
 706         volatile gint32 run_dumper_thread;
 707         MonoLockFreeQueue dumper_queue;
 708         MonoSemType dumper_queue_sem;
 709         MonoLockFreeAllocSizeClass sample_size_class;
 710         MonoLockFreeAllocator sample_allocator;
 711         MonoLockFreeQueue sample_reuse_queue;
 712         BinaryObject *binary_objects;
 713         GPtrArray *coverage_filters;
 714 };
 715
 716 typedef struct {
 717         MonoLockFreeQueueNode node;
 718         GPtrArray *methods;
 719         LogBuffer *buffer;
 720 } WriterQueueEntry;
 721
 722 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
 723
 724 typedef struct {
 725         MonoMethod *method;
 726         MonoJitInfo *ji;
 727         uint64_t time;
 728 } MethodInfo;
 729
 730 // Do not use these TLS macros directly unless you know what you're doing.
 731
 732 #ifdef HOST_WIN32
 733
 734 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
 735 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
 736 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
 737 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
 738
 739 static DWORD profiler_tls;
 740
 741 #elif HAVE_KW_THREAD
 742
 743 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
 744 #define PROF_TLS_GET() (profiler_tls)
 745 #define PROF_TLS_INIT()
 746 #define PROF_TLS_FREE()
 747
 748 static __thread MonoProfilerThread *profiler_tls;
 749
 750 #else
 751
 752 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
 753 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
 754 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
 755 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
 756
 757 static pthread_key_t profiler_tls;
 758
 759 #endif
 760
 761 static char*
 762 pstrdup (const char *s)
 763 {
 764         int len = strlen (s) + 1;
 765         char *p = (char *) g_malloc (len);
 766         memcpy (p, s, len);
 767         return p;
 768 }
 769
 770 static void *
 771 alloc_buffer (int size)
 772 {
 773         return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
 774 }
 775
 776 static void
 777 free_buffer (void *buf, int size)
 778 {
 779         mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
 780 }
 781
 782 static LogBuffer*
 783 create_buffer (uintptr_t tid, int bytes)
 784 {
 785         LogBuffer* buf = (LogBuffer *) alloc_buffer (MAX (BUFFER_SIZE, bytes));
 786
 787         InterlockedIncrement (&buffer_allocations_ctr);
 788
 789         buf->size = BUFFER_SIZE;
 790         buf->time_base = current_time ();
 791         buf->last_time = buf->time_base;
 792         buf->buf_end = (unsigned char *) buf + buf->size;
 793         buf->cursor = buf->buf;
 794         buf->thread_id = tid;
 795
 796         return buf;
 797 }
 798
 799 /*
 800  * Must be called with the reader lock held if thread is the current thread, or
 801  * the exclusive lock if thread is a different thread. However, if thread is
 802  * the current thread, and init_thread () was called with add_to_lls = FALSE,
 803  * then no locking is necessary.
 804  */
 805 static void
 806 init_buffer_state (MonoProfilerThread *thread)
 807 {
 808         thread->buffer = create_buffer (thread->node.key, 0);
 809         thread->methods = NULL;
 810 }
 811
 812 static void
 813 clear_hazard_pointers (MonoThreadHazardPointers *hp)
 814 {
 815         mono_hazard_pointer_clear (hp, 0);
 816         mono_hazard_pointer_clear (hp, 1);
 817         mono_hazard_pointer_clear (hp, 2);
 818 }
 819
 820 static MonoProfilerThread *
 821 init_thread (MonoProfiler *prof, gboolean add_to_lls)
 822 {
 823         MonoProfilerThread *thread = PROF_TLS_GET ();
 824
 825         /*
 826          * Sometimes we may try to initialize a thread twice. One example is the
 827          * main thread: We initialize it when setting up the profiler, but we will
 828          * also get a thread_start () callback for it. Another example is when
 829          * attaching new threads to the runtime: We may get a gc_alloc () callback
 830          * for that thread's thread object (where we initialize it), soon followed
 831          * by a thread_start () callback.
 832          *
 833          * These cases are harmless anyhow. Just return if we've already done the
 834          * initialization work.
 835          */
 836         if (thread)
 837                 return thread;
 838
 839         thread = g_malloc (sizeof (MonoProfilerThread));
 840         thread->node.key = thread_id ();
 841         thread->profiler = prof;
 842         thread->attached = add_to_lls;
 843         thread->call_depth = 0;
 844         thread->busy = 0;
 845         thread->ended = FALSE;
 846
 847         init_buffer_state (thread);
 848
 849         /*
 850          * Some internal profiler threads don't need to be cleaned up
 851          * by the main thread on shutdown.
 852          */
 853         if (add_to_lls) {
 854                 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
 855                 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
 856                 clear_hazard_pointers (hp);
 857         }
 858
 859         PROF_TLS_SET (thread);
 860
 861         return thread;
 862 }
 863
 864 // Only valid if init_thread () was called with add_to_lls = FALSE.
 865 static void
 866 deinit_thread (MonoProfilerThread *thread)
 867 {
 868         g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
 869
 870         g_free (thread);
 871         PROF_TLS_SET (NULL);
 872 }
 873
 874 static MonoProfilerThread *
 875 get_thread (void)
 876 {
 877         return init_thread (log_profiler, TRUE);
 878 }
 879
 880 // Only valid if init_thread () was called with add_to_lls = FALSE.
 881 static LogBuffer *
 882 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
 883 {
 884         LogBuffer *old = thread->buffer;
 885
 886         if (old && old->cursor + bytes < old->buf_end)
 887                 return old;
 888
 889         LogBuffer *new_ = create_buffer (thread->node.key, bytes);
 890         new_->next = old;
 891         thread->buffer = new_;
 892
 893         return new_;
 894 }
 895
 896 static void
 897 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
 898 {
 899         uint8_t *p = buf;
 900
 901         do {
 902                 uint8_t b = value & 0x7f;
 903                 value >>= 7;
 904
 905                 if (value != 0) /* more bytes to come */
 906                         b |= 0x80;
 907
 908                 *p ++ = b;
 909         } while (value);
 910
 911         *endbuf = p;
 912 }
 913
 914 static void
 915 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
 916 {
 917         int more = 1;
 918         int negative = (value < 0);
 919         unsigned int size = sizeof (intptr_t) * 8;
 920         uint8_t byte;
 921         uint8_t *p = buf;
 922
 923         while (more) {
 924                 byte = value & 0x7f;
 925                 value >>= 7;
 926
 927                 /* the following is unnecessary if the
 928                  * implementation of >>= uses an arithmetic rather
 929                  * than logical shift for a signed left operand
 930                  */
 931                 if (negative)
 932                         /* sign extend */
 933                         value |= - ((intptr_t) 1 <<(size - 7));
 934
 935                 /* sign bit of byte is second high order bit (0x40) */
 936                 if ((value == 0 && !(byte & 0x40)) ||
 937                     (value == -1 && (byte & 0x40)))
 938                         more = 0;
 939                 else
 940                         byte |= 0x80;
 941
 942                 *p ++= byte;
 943         }
 944
 945         *endbuf = p;
 946 }
 947
 948 static void
 949 emit_byte (LogBuffer *logbuffer, int value)
 950 {
 951         logbuffer->cursor [0] = value;
 952         logbuffer->cursor++;
 953
 954         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 955 }
 956
 957 static void
 958 emit_value (LogBuffer *logbuffer, int value)
 959 {
 960         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 961
 962         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 963 }
 964
 965 static void
 966 emit_time (LogBuffer *logbuffer, uint64_t value)
 967 {
 968         uint64_t tdiff = value - logbuffer->last_time;
 969         encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
 970         logbuffer->last_time = value;
 971
 972         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 973 }
 974
 975 static void
 976 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
 977 {
 978         emit_byte (logbuffer, event);
 979         emit_time (logbuffer, time);
 980 }
 981
 982 static void
 983 emit_event (LogBuffer *logbuffer, int event)
 984 {
 985         emit_event_time (logbuffer, event, current_time ());
 986 }
 987
 988 static void
 989 emit_svalue (LogBuffer *logbuffer, int64_t value)
 990 {
 991         encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 992
 993         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 994 }
 995
 996 static void
 997 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
 998 {
 999         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
1000
1001         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1002 }
1003
1004 static void
1005 emit_ptr (LogBuffer *logbuffer, void *ptr)
1006 {
1007         if (!logbuffer->ptr_base)
1008                 logbuffer->ptr_base = (uintptr_t) ptr;
1009
1010         emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
1011
1012         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1013 }
1014
1015 static void
1016 emit_method_inner (LogBuffer *logbuffer, void *method)
1017 {
1018         if (!logbuffer->method_base) {
1019                 logbuffer->method_base = (intptr_t) method;
1020                 logbuffer->last_method = (intptr_t) method;
1021         }
1022
1023         encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1024         logbuffer->last_method = (intptr_t) method;
1025
1026         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1027 }
1028
1029 static void
1030 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1031 {
1032         MonoProfilerThread *thread = get_thread ();
1033
1034         if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1035                 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1036
1037                 info->method = method;
1038                 info->ji = ji;
1039                 info->time = current_time ();
1040
1041                 buffer_lock ();
1042
1043                 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1044                 g_ptr_array_add (arr, info);
1045
1046                 buffer_unlock ();
1047         }
1048 }
1049
1050 static void
1051 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1052 {
1053         register_method_local (method, NULL);
1054         emit_method_inner (logbuffer, method);
1055 }
1056
1057 static void
1058 emit_obj (LogBuffer *logbuffer, void *ptr)
1059 {
1060         if (!logbuffer->obj_base)
1061                 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1062
1063         emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1064
1065         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1066 }
1067
1068 static void
1069 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1070 {
1071         size_t i = 0;
1072         if (str) {
1073                 for (; i < size; i++) {
1074                         if (str[i] == '\0')
1075                                 break;
1076                         emit_byte (logbuffer, str [i]);
1077                 }
1078         }
1079         emit_byte (logbuffer, '\0');
1080 }
1081
1082 static void
1083 emit_double (LogBuffer *logbuffer, double value)
1084 {
1085         int i;
1086         unsigned char buffer[8];
1087         memcpy (buffer, &value, 8);
1088 #if G_BYTE_ORDER == G_BIG_ENDIAN
1089         for (i = 7; i >= 0; i--)
1090 #else
1091         for (i = 0; i < 8; i++)
1092 #endif
1093                 emit_byte (logbuffer, buffer[i]);
1094 }
1095
1096 static char*
1097 write_int16 (char *buf, int32_t value)
1098 {
1099         int i;
1100         for (i = 0; i < 2; ++i) {
1101                 buf [i] = value;
1102                 value >>= 8;
1103         }
1104         return buf + 2;
1105 }
1106
1107 static char*
1108 write_int32 (char *buf, int32_t value)
1109 {
1110         int i;
1111         for (i = 0; i < 4; ++i) {
1112                 buf [i] = value;
1113                 value >>= 8;
1114         }
1115         return buf + 4;
1116 }
1117
1118 static char*
1119 write_int64 (char *buf, int64_t value)
1120 {
1121         int i;
1122         for (i = 0; i < 8; ++i) {
1123                 buf [i] = value;
1124                 value >>= 8;
1125         }
1126         return buf + 8;
1127 }
1128
1129 static char *
1130 write_header_string (char *p, const char *str)
1131 {
1132         size_t len = strlen (str) + 1;
1133
1134         p = write_int32 (p, len);
1135         strcpy (p, str);
1136
1137         return p + len;
1138 }
1139
1140 static void
1141 dump_header (MonoProfiler *profiler)
1142 {
1143         const char *args = profiler->args;
1144         const char *arch = mono_config_get_cpu ();
1145         const char *os = mono_config_get_os ();
1146
1147         char *hbuf = g_malloc (
1148                 sizeof (gint32) /* header id */ +
1149                 sizeof (gint8) /* major version */ +
1150                 sizeof (gint8) /* minor version */ +
1151                 sizeof (gint8) /* data version */ +
1152                 sizeof (gint8) /* word size */ +
1153                 sizeof (gint64) /* startup time */ +
1154                 sizeof (gint32) /* timer overhead */ +
1155                 sizeof (gint32) /* flags */ +
1156                 sizeof (gint32) /* process id */ +
1157                 sizeof (gint16) /* command port */ +
1158                 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1159                 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1160                 sizeof (gint32) + strlen (os) + 1 /* operating system */
1161         );
1162         char *p = hbuf;
1163
1164         p = write_int32 (p, LOG_HEADER_ID);
1165         *p++ = LOG_VERSION_MAJOR;
1166         *p++ = LOG_VERSION_MINOR;
1167         *p++ = LOG_DATA_VERSION;
1168         *p++ = sizeof (void *);
1169         p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1170         p = write_int32 (p, timer_overhead);
1171         p = write_int32 (p, 0); /* flags */
1172         p = write_int32 (p, process_id ());
1173         p = write_int16 (p, profiler->command_port);
1174         p = write_header_string (p, args);
1175         p = write_header_string (p, arch);
1176         p = write_header_string (p, os);
1177
1178 #if defined (HAVE_SYS_ZLIB)
1179         if (profiler->gzfile) {
1180                 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1181         } else
1182 #endif
1183         {
1184                 fwrite (hbuf, p - hbuf, 1, profiler->file);
1185                 fflush (profiler->file);
1186         }
1187
1188         g_free (hbuf);
1189 }
1190
1191 /*
1192  * Must be called with the reader lock held if thread is the current thread, or
1193  * the exclusive lock if thread is a different thread. However, if thread is
1194  * the current thread, and init_thread () was called with add_to_lls = FALSE,
1195  * then no locking is necessary.
1196  */
1197 static void
1198 send_buffer (MonoProfilerThread *thread)
1199 {
1200         WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1201         entry->methods = thread->methods;
1202         entry->buffer = thread->buffer;
1203
1204         mono_lock_free_queue_node_init (&entry->node, FALSE);
1205
1206         mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1207         mono_os_sem_post (&thread->profiler->writer_queue_sem);
1208 }
1209
1210 static void
1211 free_thread (gpointer p)
1212 {
1213         MonoProfilerThread *thread = p;
1214
1215         if (!thread->ended) {
1216                 /*
1217                  * The thread is being cleaned up by the main thread during
1218                  * shutdown. This typically happens for internal runtime
1219                  * threads. We need to synthesize a thread end event.
1220                  */
1221
1222                 InterlockedIncrement (&thread_ends_ctr);
1223
1224                 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1225                         LogBuffer *buf = ensure_logbuf_unsafe (thread,
1226                                 EVENT_SIZE /* event */ +
1227                                 BYTE_SIZE /* type */ +
1228                                 LEB128_SIZE /* tid */
1229                         );
1230
1231                         emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1232                         emit_byte (buf, TYPE_THREAD);
1233                         emit_ptr (buf, (void *) thread->node.key);
1234                 }
1235         }
1236
1237         send_buffer (thread);
1238
1239         g_free (thread);
1240 }
1241
1242 static void
1243 remove_thread (MonoProfilerThread *thread)
1244 {
1245         MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1246
1247         if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1248                 mono_thread_hazardous_try_free (thread, free_thread);
1249
1250         clear_hazard_pointers (hp);
1251 }
1252
1253 static void
1254 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1255 {
1256         char hbuf [128];
1257         char *p = hbuf;
1258
1259         if (buf->next)
1260                 dump_buffer (profiler, buf->next);
1261
1262         if (buf->cursor - buf->buf) {
1263                 p = write_int32 (p, BUF_ID);
1264                 p = write_int32 (p, buf->cursor - buf->buf);
1265                 p = write_int64 (p, buf->time_base);
1266                 p = write_int64 (p, buf->ptr_base);
1267                 p = write_int64 (p, buf->obj_base);
1268                 p = write_int64 (p, buf->thread_id);
1269                 p = write_int64 (p, buf->method_base);
1270
1271 #if defined (HAVE_SYS_ZLIB)
1272                 if (profiler->gzfile) {
1273                         gzwrite (profiler->gzfile, hbuf, p - hbuf);
1274                         gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1275                 } else
1276 #endif
1277                 {
1278                         fwrite (hbuf, p - hbuf, 1, profiler->file);
1279                         fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1280                         fflush (profiler->file);
1281                 }
1282         }
1283
1284         free_buffer (buf, buf->size);
1285 }
1286
1287 static void
1288 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1289 {
1290         for (LogBuffer *iter = buf; iter; iter = iter->next)
1291                 iter->thread_id = 0;
1292
1293         dump_buffer (profiler, buf);
1294 }
1295
1296 // Only valid if init_thread () was called with add_to_lls = FALSE.
1297 static void
1298 send_log_unsafe (gboolean if_needed)
1299 {
1300         MonoProfilerThread *thread = PROF_TLS_GET ();
1301
1302         if (!if_needed || (if_needed && thread->buffer->next)) {
1303                 if (!thread->attached)
1304                         for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1305                                 iter->thread_id = 0;
1306
1307                 send_buffer (thread);
1308                 init_buffer_state (thread);
1309         }
1310 }
1311
1312 // Assumes that the exclusive lock is held.
1313 static void
1314 sync_point_flush (void)
1315 {
1316         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1317
1318         MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1319                 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1320
1321                 send_buffer (thread);
1322                 init_buffer_state (thread);
1323         } MONO_LLS_FOREACH_SAFE_END
1324 }
1325
1326 // Assumes that the exclusive lock is held.
1327 static void
1328 sync_point_mark (MonoProfilerSyncPointType type)
1329 {
1330         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1331
1332         ENTER_LOG (&sync_points_ctr, logbuffer,
1333                 EVENT_SIZE /* event */ +
1334                 LEB128_SIZE /* type */
1335         );
1336
1337         emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1338         emit_byte (logbuffer, type);
1339
1340         EXIT_LOG_EXPLICIT (NO_SEND);
1341
1342         send_log_unsafe (FALSE);
1343 }
1344
1345 // Assumes that the exclusive lock is held.
1346 static void
1347 sync_point (MonoProfilerSyncPointType type)
1348 {
1349         sync_point_flush ();
1350         sync_point_mark (type);
1351 }
1352
1353 static int
1354 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1355 {
1356         /* account for object alignment in the heap */
1357         size += 7;
1358         size &= ~7;
1359
1360         ENTER_LOG (&heap_objects_ctr, logbuffer,
1361                 EVENT_SIZE /* event */ +
1362                 LEB128_SIZE /* obj */ +
1363                 LEB128_SIZE /* klass */ +
1364                 LEB128_SIZE /* size */ +
1365                 LEB128_SIZE /* num */ +
1366                 num * (
1367                         LEB128_SIZE /* offset */ +
1368                         LEB128_SIZE /* ref */
1369                 )
1370         );
1371
1372         emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1373         emit_obj (logbuffer, obj);
1374         emit_ptr (logbuffer, klass);
1375         emit_value (logbuffer, size);
1376         emit_value (logbuffer, num);
1377
1378         uintptr_t last_offset = 0;
1379
1380         for (int i = 0; i < num; ++i) {
1381                 emit_value (logbuffer, offsets [i] - last_offset);
1382                 last_offset = offsets [i];
1383                 emit_obj (logbuffer, refs [i]);
1384         }
1385
1386         EXIT_LOG_EXPLICIT (DO_SEND);
1387
1388         return 0;
1389 }
1390
1391 static unsigned int hs_mode_ms = 0;
1392 static unsigned int hs_mode_gc = 0;
1393 static unsigned int hs_mode_ondemand = 0;
1394 static unsigned int gc_count = 0;
1395 static uint64_t last_hs_time = 0;
1396 static gboolean do_heap_walk = FALSE;
1397 static gboolean ignore_heap_events;
1398
1399 static void
1400 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
1401 {
1402         if (ignore_heap_events)
1403                 return;
1404
1405         ENTER_LOG (&heap_roots_ctr, logbuffer,
1406                 EVENT_SIZE /* event */ +
1407                 LEB128_SIZE /* num */ +
1408                 LEB128_SIZE /* collections */ +
1409                 num * (
1410                         LEB128_SIZE /* object */ +
1411                         LEB128_SIZE /* root type */ +
1412                         LEB128_SIZE /* extra info */
1413                 )
1414         );
1415
1416         emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1417         emit_value (logbuffer, num);
1418         emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1419
1420         for (int i = 0; i < num; ++i) {
1421                 emit_obj (logbuffer, objects [i]);
1422                 emit_byte (logbuffer, root_types [i]);
1423                 emit_value (logbuffer, extra_info [i]);
1424         }
1425
1426         EXIT_LOG_EXPLICIT (DO_SEND);
1427 }
1428
1429
1430 static void
1431 trigger_on_demand_heapshot (void)
1432 {
1433         if (heapshot_requested)
1434                 mono_gc_collect (mono_gc_max_generation ());
1435 }
1436
1437 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1438
1439 static void
1440 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation)
1441 {
1442         if (ev == MONO_GC_EVENT_START) {
1443                 uint64_t now = current_time ();
1444
1445                 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1446                         do_heap_walk = TRUE;
1447                 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1448                         do_heap_walk = TRUE;
1449                 else if (hs_mode_ondemand)
1450                         do_heap_walk = heapshot_requested;
1451                 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1452                         do_heap_walk = TRUE;
1453
1454                 //If using heapshot, ignore events for collections we don't care
1455                 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1456                         // Ignore events generated during the collection itself (IE GC ROOTS)
1457                         ignore_heap_events = !do_heap_walk;
1458                 }
1459         }
1460
1461
1462         if (ENABLED (PROFLOG_GC_EVENTS)) {
1463                 ENTER_LOG (&gc_events_ctr, logbuffer,
1464                         EVENT_SIZE /* event */ +
1465                         BYTE_SIZE /* gc event */ +
1466                         BYTE_SIZE /* generation */
1467                 );
1468
1469                 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1470                 emit_byte (logbuffer, ev);
1471                 emit_byte (logbuffer, generation);
1472
1473                 EXIT_LOG_EXPLICIT (NO_SEND);
1474         }
1475
1476         switch (ev) {
1477         case MONO_GC_EVENT_START:
1478                 if (generation == mono_gc_max_generation ())
1479                         gc_count++;
1480
1481                 break;
1482         case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1483                 /*
1484                  * Ensure that no thread can be in the middle of writing to
1485                  * a buffer when the world stops...
1486                  */
1487                 buffer_lock_excl ();
1488                 break;
1489         case MONO_GC_EVENT_POST_STOP_WORLD:
1490                 /*
1491                  * ... So that we now have a consistent view of all buffers.
1492                  * This allows us to flush them. We need to do this because
1493                  * they may contain object allocation events that need to be
1494                  * committed to the log file before any object move events
1495                  * that will be produced during this GC.
1496                  */
1497                 if (ENABLED (ALL_GC_EVENTS_MASK))
1498                         sync_point (SYNC_POINT_WORLD_STOP);
1499
1500                 /*
1501                  * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1502                  * Right now, that's the case for GC Moves, GC Roots or heapshots.
1503                  */
1504                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1505                         ENTER_LOG (&heap_starts_ctr, logbuffer,
1506                                 EVENT_SIZE /* event */
1507                         );
1508
1509                         emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1510
1511                         EXIT_LOG_EXPLICIT (DO_SEND);
1512                 }
1513
1514                 break;
1515         case MONO_GC_EVENT_PRE_START_WORLD:
1516                 if (do_heap_shot && do_heap_walk)
1517                         mono_gc_walk_heap (0, gc_reference, NULL);
1518
1519                 /* Matching HEAP_END to the HEAP_START from above */
1520                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1521                         ENTER_LOG (&heap_ends_ctr, logbuffer,
1522                                 EVENT_SIZE /* event */
1523                         );
1524
1525                         emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1526
1527                         EXIT_LOG_EXPLICIT (DO_SEND);
1528                 }
1529
1530                 if (do_heap_shot && do_heap_walk) {
1531                         do_heap_walk = FALSE;
1532                         heapshot_requested = 0;
1533                         last_hs_time = current_time ();
1534                 }
1535
1536                 /*
1537                  * Similarly, we must now make sure that any object moves
1538                  * written to the GC thread's buffer are flushed. Otherwise,
1539                  * object allocation events for certain addresses could come
1540                  * after the move events that made those addresses available.
1541                  */
1542                 if (ENABLED (ALL_GC_EVENTS_MASK))
1543                         sync_point_mark (SYNC_POINT_WORLD_START);
1544                 break;
1545         case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1546                 /*
1547                  * Finally, it is safe to allow other threads to write to
1548                  * their buffers again.
1549                  */
1550                 buffer_unlock_excl ();
1551                 break;
1552         default:
1553                 break;
1554         }
1555 }
1556
1557 static void
1558 gc_resize (MonoProfiler *profiler, int64_t new_size)
1559 {
1560         ENTER_LOG (&gc_resizes_ctr, logbuffer,
1561                 EVENT_SIZE /* event */ +
1562                 LEB128_SIZE /* new size */
1563         );
1564
1565         emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1566         emit_value (logbuffer, new_size);
1567
1568         EXIT_LOG_EXPLICIT (DO_SEND);
1569 }
1570
1571 typedef struct {
1572         int count;
1573         MonoMethod* methods [MAX_FRAMES];
1574         int32_t il_offsets [MAX_FRAMES];
1575         int32_t native_offsets [MAX_FRAMES];
1576 } FrameData;
1577
1578 static int num_frames = MAX_FRAMES;
1579
1580 static mono_bool
1581 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1582 {
1583         FrameData *frame = (FrameData *)data;
1584         if (method && frame->count < num_frames) {
1585                 frame->il_offsets [frame->count] = il_offset;
1586                 frame->native_offsets [frame->count] = native_offset;
1587                 frame->methods [frame->count++] = method;
1588                 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1589         }
1590         return frame->count == num_frames;
1591 }
1592
1593 /*
1594  * a note about stack walks: they can cause more profiler events to fire,
1595  * so we need to make sure they don't happen after we started emitting an
1596  * event, hence the collect_bt/emit_bt split.
1597  */
1598 static void
1599 collect_bt (FrameData *data)
1600 {
1601         data->count = 0;
1602         mono_stack_walk_no_il (walk_stack, data);
1603 }
1604
1605 static void
1606 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1607 {
1608         if (data->count > num_frames)
1609                 printf ("bad num frames: %d\n", data->count);
1610
1611         emit_value (logbuffer, data->count);
1612
1613         while (data->count)
1614                 emit_method (logbuffer, data->methods [--data->count]);
1615 }
1616
1617 static void
1618 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
1619 {
1620         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1621         FrameData data;
1622         uintptr_t len = mono_object_get_size (obj);
1623         /* account for object alignment in the heap */
1624         len += 7;
1625         len &= ~7;
1626
1627         if (do_bt)
1628                 collect_bt (&data);
1629
1630         ENTER_LOG (&gc_allocs_ctr, logbuffer,
1631                 EVENT_SIZE /* event */ +
1632                 LEB128_SIZE /* klass */ +
1633                 LEB128_SIZE /* obj */ +
1634                 LEB128_SIZE /* size */ +
1635                 (do_bt ? (
1636                         LEB128_SIZE /* count */ +
1637                         data.count * (
1638                                 LEB128_SIZE /* method */
1639                         )
1640                 ) : 0)
1641         );
1642
1643         emit_event (logbuffer, do_bt | TYPE_ALLOC);
1644         emit_ptr (logbuffer, klass);
1645         emit_obj (logbuffer, obj);
1646         emit_value (logbuffer, len);
1647
1648         if (do_bt)
1649                 emit_bt (prof, logbuffer, &data);
1650
1651         EXIT_LOG;
1652 }
1653
1654 static void
1655 gc_moves (MonoProfiler *prof, void **objects, int num)
1656 {
1657         ENTER_LOG (&gc_moves_ctr, logbuffer,
1658                 EVENT_SIZE /* event */ +
1659                 LEB128_SIZE /* num */ +
1660                 num * (
1661                         LEB128_SIZE /* object */
1662                 )
1663         );
1664
1665         emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1666         emit_value (logbuffer, num);
1667
1668         for (int i = 0; i < num; ++i)
1669                 emit_obj (logbuffer, objects [i]);
1670
1671         EXIT_LOG_EXPLICIT (DO_SEND);
1672 }
1673
1674 static void
1675 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
1676 {
1677         int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1678         FrameData data;
1679
1680         if (do_bt)
1681                 collect_bt (&data);
1682
1683         gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1684
1685         ENTER_LOG (ctr, logbuffer,
1686                 EVENT_SIZE /* event */ +
1687                 LEB128_SIZE /* type */ +
1688                 LEB128_SIZE /* handle */ +
1689                 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1690                         LEB128_SIZE /* obj */
1691                 ) : 0) +
1692                 (do_bt ? (
1693                         LEB128_SIZE /* count */ +
1694                         data.count * (
1695                                 LEB128_SIZE /* method */
1696                         )
1697                 ) : 0)
1698         );
1699
1700         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1701                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1702         else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1703                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1704         else
1705                 g_assert_not_reached ();
1706
1707         emit_value (logbuffer, type);
1708         emit_value (logbuffer, handle);
1709
1710         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1711                 emit_obj (logbuffer, obj);
1712
1713         if (do_bt)
1714                 emit_bt (prof, logbuffer, &data);
1715
1716         EXIT_LOG;
1717 }
1718
1719 static void
1720 finalize_begin (MonoProfiler *prof)
1721 {
1722         ENTER_LOG (&finalize_begins_ctr, buf,
1723                 EVENT_SIZE /* event */
1724         );
1725
1726         emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1727
1728         EXIT_LOG;
1729 }
1730
1731 static void
1732 finalize_end (MonoProfiler *prof)
1733 {
1734         trigger_on_demand_heapshot ();
1735         if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1736                 ENTER_LOG (&finalize_ends_ctr, buf,
1737                         EVENT_SIZE /* event */
1738                 );
1739
1740                 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1741
1742                 EXIT_LOG;
1743         }
1744 }
1745
1746 static void
1747 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1748 {
1749         ENTER_LOG (&finalize_object_begins_ctr, buf,
1750                 EVENT_SIZE /* event */ +
1751                 LEB128_SIZE /* obj */
1752         );
1753
1754         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1755         emit_obj (buf, obj);
1756
1757         EXIT_LOG;
1758 }
1759
1760 static void
1761 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1762 {
1763         ENTER_LOG (&finalize_object_ends_ctr, buf,
1764                 EVENT_SIZE /* event */ +
1765                 LEB128_SIZE /* obj */
1766         );
1767
1768         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1769         emit_obj (buf, obj);
1770
1771         EXIT_LOG;
1772 }
1773
1774 static char*
1775 push_nesting (char *p, MonoClass *klass)
1776 {
1777         MonoClass *nesting;
1778         const char *name;
1779         const char *nspace;
1780         nesting = mono_class_get_nesting_type (klass);
1781         if (nesting) {
1782                 p = push_nesting (p, nesting);
1783                 *p++ = '/';
1784                 *p = 0;
1785         }
1786         name = mono_class_get_name (klass);
1787         nspace = mono_class_get_namespace (klass);
1788         if (*nspace) {
1789                 strcpy (p, nspace);
1790                 p += strlen (nspace);
1791                 *p++ = '.';
1792                 *p = 0;
1793         }
1794         strcpy (p, name);
1795         p += strlen (name);
1796         return p;
1797 }
1798
1799 static char*
1800 type_name (MonoClass *klass)
1801 {
1802         char buf [1024];
1803         char *p;
1804         push_nesting (buf, klass);
1805         p = (char *) g_malloc (strlen (buf) + 1);
1806         strcpy (p, buf);
1807         return p;
1808 }
1809
1810 static void
1811 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
1812 {
1813         if (result != MONO_PROFILE_OK)
1814                 return;
1815
1816         const char *name = mono_image_get_filename (image);
1817         int nlen = strlen (name) + 1;
1818
1819         ENTER_LOG (&image_loads_ctr, logbuffer,
1820                 EVENT_SIZE /* event */ +
1821                 BYTE_SIZE /* type */ +
1822                 LEB128_SIZE /* image */ +
1823                 nlen /* name */
1824         );
1825
1826         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1827         emit_byte (logbuffer, TYPE_IMAGE);
1828         emit_ptr (logbuffer, image);
1829         memcpy (logbuffer->cursor, name, nlen);
1830         logbuffer->cursor += nlen;
1831
1832         EXIT_LOG;
1833 }
1834
1835 static void
1836 image_unloaded (MonoProfiler *prof, MonoImage *image)
1837 {
1838         const char *name = mono_image_get_filename (image);
1839         int nlen = strlen (name) + 1;
1840
1841         ENTER_LOG (&image_unloads_ctr, logbuffer,
1842                 EVENT_SIZE /* event */ +
1843                 BYTE_SIZE /* type */ +
1844                 LEB128_SIZE /* image */ +
1845                 nlen /* name */
1846         );
1847
1848         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1849         emit_byte (logbuffer, TYPE_IMAGE);
1850         emit_ptr (logbuffer, image);
1851         memcpy (logbuffer->cursor, name, nlen);
1852         logbuffer->cursor += nlen;
1853
1854         EXIT_LOG;
1855 }
1856
1857 static void
1858 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly, int result)
1859 {
1860         if (result != MONO_PROFILE_OK)
1861                 return;
1862
1863         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1864         int nlen = strlen (name) + 1;
1865         MonoImage *image = mono_assembly_get_image (assembly);
1866
1867         ENTER_LOG (&assembly_loads_ctr, logbuffer,
1868                 EVENT_SIZE /* event */ +
1869                 BYTE_SIZE /* type */ +
1870                 LEB128_SIZE /* assembly */ +
1871                 LEB128_SIZE /* image */ +
1872                 nlen /* name */
1873         );
1874
1875         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1876         emit_byte (logbuffer, TYPE_ASSEMBLY);
1877         emit_ptr (logbuffer, assembly);
1878         emit_ptr (logbuffer, image);
1879         memcpy (logbuffer->cursor, name, nlen);
1880         logbuffer->cursor += nlen;
1881
1882         EXIT_LOG;
1883
1884         mono_free (name);
1885 }
1886
1887 static void
1888 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1889 {
1890         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1891         int nlen = strlen (name) + 1;
1892         MonoImage *image = mono_assembly_get_image (assembly);
1893
1894         ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1895                 EVENT_SIZE /* event */ +
1896                 BYTE_SIZE /* type */ +
1897                 LEB128_SIZE /* assembly */ +
1898                 LEB128_SIZE /* image */ +
1899                 nlen /* name */
1900         );
1901
1902         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1903         emit_byte (logbuffer, TYPE_ASSEMBLY);
1904         emit_ptr (logbuffer, assembly);
1905         emit_ptr (logbuffer, image);
1906         memcpy (logbuffer->cursor, name, nlen);
1907         logbuffer->cursor += nlen;
1908
1909         EXIT_LOG;
1910
1911         mono_free (name);
1912 }
1913
1914 static void
1915 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
1916 {
1917         if (result != MONO_PROFILE_OK)
1918                 return;
1919
1920         char *name;
1921
1922         if (InterlockedRead (&runtime_inited))
1923                 name = mono_type_get_name (mono_class_get_type (klass));
1924         else
1925                 name = type_name (klass);
1926
1927         int nlen = strlen (name) + 1;
1928         MonoImage *image = mono_class_get_image (klass);
1929
1930         ENTER_LOG (&class_loads_ctr, logbuffer,
1931                 EVENT_SIZE /* event */ +
1932                 BYTE_SIZE /* type */ +
1933                 LEB128_SIZE /* klass */ +
1934                 LEB128_SIZE /* image */ +
1935                 nlen /* name */
1936         );
1937
1938         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1939         emit_byte (logbuffer, TYPE_CLASS);
1940         emit_ptr (logbuffer, klass);
1941         emit_ptr (logbuffer, image);
1942         memcpy (logbuffer->cursor, name, nlen);
1943         logbuffer->cursor += nlen;
1944
1945         EXIT_LOG;
1946
1947         if (runtime_inited)
1948                 mono_free (name);
1949         else
1950                 g_free (name);
1951 }
1952
1953 static void
1954 class_unloaded (MonoProfiler *prof, MonoClass *klass)
1955 {
1956         char *name;
1957
1958         if (InterlockedRead (&runtime_inited))
1959                 name = mono_type_get_name (mono_class_get_type (klass));
1960         else
1961                 name = type_name (klass);
1962
1963         int nlen = strlen (name) + 1;
1964         MonoImage *image = mono_class_get_image (klass);
1965
1966         ENTER_LOG (&class_unloads_ctr, logbuffer,
1967                 EVENT_SIZE /* event */ +
1968                 BYTE_SIZE /* type */ +
1969                 LEB128_SIZE /* klass */ +
1970                 LEB128_SIZE /* image */ +
1971                 nlen /* name */
1972         );
1973
1974         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1975         emit_byte (logbuffer, TYPE_CLASS);
1976         emit_ptr (logbuffer, klass);
1977         emit_ptr (logbuffer, image);
1978         memcpy (logbuffer->cursor, name, nlen);
1979         logbuffer->cursor += nlen;
1980
1981         EXIT_LOG;
1982
1983         if (runtime_inited)
1984                 mono_free (name);
1985         else
1986                 g_free (name);
1987 }
1988
1989 static void process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method);
1990
1991 static void
1992 method_enter (MonoProfiler *prof, MonoMethod *method)
1993 {
1994         process_method_enter_coverage (prof, method);
1995
1996         if (!only_coverage && get_thread ()->call_depth++ <= max_call_depth) {
1997                 ENTER_LOG (&method_entries_ctr, logbuffer,
1998                         EVENT_SIZE /* event */ +
1999                         LEB128_SIZE /* method */
2000                 );
2001
2002                 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
2003                 emit_method (logbuffer, method);
2004
2005                 EXIT_LOG;
2006         }
2007 }
2008
2009 static void
2010 method_leave (MonoProfiler *prof, MonoMethod *method)
2011 {
2012         if (!only_coverage && --get_thread ()->call_depth <= max_call_depth) {
2013                 ENTER_LOG (&method_exits_ctr, logbuffer,
2014                         EVENT_SIZE /* event */ +
2015                         LEB128_SIZE /* method */
2016                 );
2017
2018                 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2019                 emit_method (logbuffer, method);
2020
2021                 EXIT_LOG;
2022         }
2023 }
2024
2025 static void
2026 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
2027 {
2028         if (!only_coverage && !nocalls && --get_thread ()->call_depth <= max_call_depth) {
2029                 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2030                         EVENT_SIZE /* event */ +
2031                         LEB128_SIZE /* method */
2032                 );
2033
2034                 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2035                 emit_method (logbuffer, method);
2036
2037                 EXIT_LOG;
2038         }
2039 }
2040
2041 static void
2042 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji, int result)
2043 {
2044         if (result != MONO_PROFILE_OK)
2045                 return;
2046
2047         register_method_local (method, ji);
2048 }
2049
2050 static void
2051 code_buffer_new (MonoProfiler *prof, void *buffer, int size, MonoProfilerCodeBufferType type, void *data)
2052 {
2053         char *name;
2054         int nlen;
2055
2056         if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2057                 name = (char *) data;
2058                 nlen = strlen (name) + 1;
2059         } else {
2060                 name = NULL;
2061                 nlen = 0;
2062         }
2063
2064         ENTER_LOG (&code_buffers_ctr, logbuffer,
2065                 EVENT_SIZE /* event */ +
2066                 BYTE_SIZE /* type */ +
2067                 LEB128_SIZE /* buffer */ +
2068                 LEB128_SIZE /* size */ +
2069                 (name ? (
2070                         nlen /* name */
2071                 ) : 0)
2072         );
2073
2074         emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2075         emit_byte (logbuffer, type);
2076         emit_ptr (logbuffer, buffer);
2077         emit_value (logbuffer, size);
2078
2079         if (name) {
2080                 memcpy (logbuffer->cursor, name, nlen);
2081                 logbuffer->cursor += nlen;
2082         }
2083
2084         EXIT_LOG;
2085 }
2086
2087 static void
2088 throw_exc (MonoProfiler *prof, MonoObject *object)
2089 {
2090         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2091         FrameData data;
2092
2093         if (do_bt)
2094                 collect_bt (&data);
2095
2096         ENTER_LOG (&exception_throws_ctr, logbuffer,
2097                 EVENT_SIZE /* event */ +
2098                 LEB128_SIZE /* object */ +
2099                 (do_bt ? (
2100                         LEB128_SIZE /* count */ +
2101                         data.count * (
2102                                 LEB128_SIZE /* method */
2103                         )
2104                 ) : 0)
2105         );
2106
2107         emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2108         emit_obj (logbuffer, object);
2109
2110         if (do_bt)
2111                 emit_bt (prof, logbuffer, &data);
2112
2113         EXIT_LOG;
2114 }
2115
2116 static void
2117 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num, MonoObject *exc)
2118 {
2119         ENTER_LOG (&exception_clauses_ctr, logbuffer,
2120                 EVENT_SIZE /* event */ +
2121                 BYTE_SIZE /* clause type */ +
2122                 LEB128_SIZE /* clause num */ +
2123                 LEB128_SIZE /* method */
2124         );
2125
2126         emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2127         emit_byte (logbuffer, clause_type);
2128         emit_value (logbuffer, clause_num);
2129         emit_method (logbuffer, method);
2130         emit_obj (logbuffer, exc);
2131
2132         EXIT_LOG;
2133 }
2134
2135 static void
2136 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2137 {
2138         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2139         FrameData data;
2140
2141         if (do_bt)
2142                 collect_bt (&data);
2143
2144         ENTER_LOG (&monitor_events_ctr, logbuffer,
2145                 EVENT_SIZE /* event */ +
2146                 BYTE_SIZE /* ev */ +
2147                 LEB128_SIZE /* object */ +
2148                 (do_bt ? (
2149                         LEB128_SIZE /* count */ +
2150                         data.count * (
2151                                 LEB128_SIZE /* method */
2152                         )
2153                 ) : 0)
2154         );
2155
2156         emit_event (logbuffer, do_bt | TYPE_MONITOR);
2157         emit_byte (logbuffer, ev);
2158         emit_obj (logbuffer, object);
2159
2160         if (do_bt)
2161                 emit_bt (profiler, logbuffer, &data);
2162
2163         EXIT_LOG;
2164 }
2165
2166 static void
2167 thread_start (MonoProfiler *prof, uintptr_t tid)
2168 {
2169         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2170                 ENTER_LOG (&thread_starts_ctr, logbuffer,
2171                         EVENT_SIZE /* event */ +
2172                         BYTE_SIZE /* type */ +
2173                         LEB128_SIZE /* tid */
2174                 );
2175
2176                 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2177                 emit_byte (logbuffer, TYPE_THREAD);
2178                 emit_ptr (logbuffer, (void*) tid);
2179
2180                 EXIT_LOG;
2181         }
2182 }
2183
2184 static void
2185 thread_end (MonoProfiler *prof, uintptr_t tid)
2186 {
2187         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2188                 ENTER_LOG (&thread_ends_ctr, logbuffer,
2189                         EVENT_SIZE /* event */ +
2190                         BYTE_SIZE /* type */ +
2191                         LEB128_SIZE /* tid */
2192                 );
2193
2194                 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2195                 emit_byte (logbuffer, TYPE_THREAD);
2196                 emit_ptr (logbuffer, (void*) tid);
2197
2198                 EXIT_LOG_EXPLICIT (NO_SEND);
2199         }
2200
2201         MonoProfilerThread *thread = get_thread ();
2202
2203         thread->ended = TRUE;
2204         remove_thread (thread);
2205
2206         PROF_TLS_SET (NULL);
2207 }
2208
2209 static void
2210 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2211 {
2212         int len = strlen (name) + 1;
2213
2214         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2215                 ENTER_LOG (&thread_names_ctr, logbuffer,
2216                         EVENT_SIZE /* event */ +
2217                         BYTE_SIZE /* type */ +
2218                         LEB128_SIZE /* tid */ +
2219                         len /* name */
2220                 );
2221
2222                 emit_event (logbuffer, TYPE_METADATA);
2223                 emit_byte (logbuffer, TYPE_THREAD);
2224                 emit_ptr (logbuffer, (void*)tid);
2225                 memcpy (logbuffer->cursor, name, len);
2226                 logbuffer->cursor += len;
2227
2228                 EXIT_LOG;
2229         }
2230 }
2231
2232 static void
2233 domain_loaded (MonoProfiler *prof, MonoDomain *domain, int result)
2234 {
2235         if (result != MONO_PROFILE_OK)
2236                 return;
2237
2238         ENTER_LOG (&domain_loads_ctr, logbuffer,
2239                 EVENT_SIZE /* event */ +
2240                 BYTE_SIZE /* type */ +
2241                 LEB128_SIZE /* domain id */
2242         );
2243
2244         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2245         emit_byte (logbuffer, TYPE_DOMAIN);
2246         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2247
2248         EXIT_LOG;
2249 }
2250
2251 static void
2252 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2253 {
2254         ENTER_LOG (&domain_unloads_ctr, logbuffer,
2255                 EVENT_SIZE /* event */ +
2256                 BYTE_SIZE /* type */ +
2257                 LEB128_SIZE /* domain id */
2258         );
2259
2260         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2261         emit_byte (logbuffer, TYPE_DOMAIN);
2262         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2263
2264         EXIT_LOG;
2265 }
2266
2267 static void
2268 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2269 {
2270         int nlen = strlen (name) + 1;
2271
2272         ENTER_LOG (&domain_names_ctr, logbuffer,
2273                 EVENT_SIZE /* event */ +
2274                 BYTE_SIZE /* type */ +
2275                 LEB128_SIZE /* domain id */ +
2276                 nlen /* name */
2277         );
2278
2279         emit_event (logbuffer, TYPE_METADATA);
2280         emit_byte (logbuffer, TYPE_DOMAIN);
2281         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2282         memcpy (logbuffer->cursor, name, nlen);
2283         logbuffer->cursor += nlen;
2284
2285         EXIT_LOG;
2286 }
2287
2288 static void
2289 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2290 {
2291         ENTER_LOG (&context_loads_ctr, logbuffer,
2292                 EVENT_SIZE /* event */ +
2293                 BYTE_SIZE /* type */ +
2294                 LEB128_SIZE /* context id */ +
2295                 LEB128_SIZE /* domain id */
2296         );
2297
2298         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2299         emit_byte (logbuffer, TYPE_CONTEXT);
2300         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2301         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2302
2303         EXIT_LOG;
2304 }
2305
2306 static void
2307 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2308 {
2309         ENTER_LOG (&context_unloads_ctr, logbuffer,
2310                 EVENT_SIZE /* event */ +
2311                 BYTE_SIZE /* type */ +
2312                 LEB128_SIZE /* context id */ +
2313                 LEB128_SIZE /* domain id */
2314         );
2315
2316         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2317         emit_byte (logbuffer, TYPE_CONTEXT);
2318         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2319         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2320
2321         EXIT_LOG;
2322 }
2323
2324 typedef struct {
2325         MonoMethod *method;
2326         MonoDomain *domain;
2327         void *base_address;
2328         int offset;
2329 } AsyncFrameInfo;
2330
2331 typedef struct {
2332         MonoLockFreeQueueNode node;
2333         MonoProfiler *prof;
2334         uint64_t time;
2335         uintptr_t tid;
2336         void *ip;
2337         int count;
2338         AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2339 } SampleHit;
2340
2341 static mono_bool
2342 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2343 {
2344         SampleHit *sample = (SampleHit *) data;
2345
2346         if (sample->count < num_frames) {
2347                 int i = sample->count;
2348
2349                 sample->frames [i].method = method;
2350                 sample->frames [i].domain = domain;
2351                 sample->frames [i].base_address = base_address;
2352                 sample->frames [i].offset = offset;
2353
2354                 sample->count++;
2355         }
2356
2357         return sample->count == num_frames;
2358 }
2359
2360 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2361 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2362
2363 static void
2364 enqueue_sample_hit (gpointer p)
2365 {
2366         SampleHit *sample = p;
2367
2368         mono_lock_free_queue_node_unpoison (&sample->node);
2369         mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2370         mono_os_sem_post (&sample->prof->dumper_queue_sem);
2371 }
2372
2373 static void
2374 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
2375 {
2376         /*
2377          * Please note: We rely on the runtime loading the profiler with
2378          * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2379          * this function (and its siblings) are resolved when the profiler is
2380          * loaded. Otherwise, we would potentially invoke the dynamic linker when
2381          * invoking runtime functions, which is not async-signal-safe.
2382          */
2383
2384         if (InterlockedRead (&in_shutdown))
2385                 return;
2386
2387         SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2388
2389         if (!sample) {
2390                 /*
2391                  * If we're out of reusable sample events and we're not allowed to
2392                  * allocate more, we have no choice but to drop the event.
2393                  */
2394                 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2395                         return;
2396
2397                 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2398                 sample->prof = profiler;
2399                 mono_lock_free_queue_node_init (&sample->node, TRUE);
2400
2401                 InterlockedIncrement (&sample_allocations_ctr);
2402         }
2403
2404         sample->count = 0;
2405         mono_stack_walk_async_safe (&async_walk_stack, context, sample);
2406
2407         sample->time = current_time ();
2408         sample->tid = thread_id ();
2409         sample->ip = ip;
2410
2411         mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2412 }
2413
2414 static uintptr_t *code_pages = 0;
2415 static int num_code_pages = 0;
2416 static int size_code_pages = 0;
2417 #define CPAGE_SHIFT (9)
2418 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2419 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2420 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2421
2422 static uintptr_t
2423 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2424 {
2425         uintptr_t i;
2426         uintptr_t start_pos;
2427         start_pos = (page >> CPAGE_SHIFT) % hsize;
2428         i = start_pos;
2429         do {
2430                 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2431                         return 0;
2432                 } else if (!hash [i]) {
2433                         hash [i] = page;
2434                         return 1;
2435                 }
2436                 /* wrap around */
2437                 if (++i == hsize)
2438                         i = 0;
2439         } while (i != start_pos);
2440         /* should not happen */
2441         printf ("failed code page store\n");
2442         return 0;
2443 }
2444
2445 static void
2446 add_code_pointer (uintptr_t ip)
2447 {
2448         uintptr_t i;
2449         if (num_code_pages * 2 >= size_code_pages) {
2450                 uintptr_t *n;
2451                 uintptr_t old_size = size_code_pages;
2452                 size_code_pages *= 2;
2453                 if (size_code_pages == 0)
2454                         size_code_pages = 16;
2455                 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2456                 for (i = 0; i < old_size; ++i) {
2457                         if (code_pages [i])
2458                                 add_code_page (n, size_code_pages, code_pages [i]);
2459                 }
2460                 if (code_pages)
2461                         g_free (code_pages);
2462                 code_pages = n;
2463         }
2464         num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2465 }
2466
2467 /* ELF code crashes on some systems. */
2468 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2469 #if 0
2470 static void
2471 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2472 {
2473         int len = strlen (filename) + 1;
2474
2475         ENTER_LOG (&sample_ubins_ctr, logbuffer,
2476                 EVENT_SIZE /* event */ +
2477                 LEB128_SIZE /* load address */ +
2478                 LEB128_SIZE /* offset */ +
2479                 LEB128_SIZE /* size */ +
2480                 nlen /* file name */
2481         );
2482
2483         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2484         emit_ptr (logbuffer, load_addr);
2485         emit_uvalue (logbuffer, offset);
2486         emit_uvalue (logbuffer, size);
2487         memcpy (logbuffer->cursor, filename, len);
2488         logbuffer->cursor += len;
2489
2490         EXIT_LOG_EXPLICIT (DO_SEND);
2491 }
2492 #endif
2493
2494 static void
2495 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2496 {
2497         int len = strlen (name) + 1;
2498
2499         ENTER_LOG (&sample_usyms_ctr, logbuffer,
2500                 EVENT_SIZE /* event */ +
2501                 LEB128_SIZE /* value */ +
2502                 LEB128_SIZE /* size */ +
2503                 len /* name */
2504         );
2505
2506         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2507         emit_ptr (logbuffer, (void*)value);
2508         emit_value (logbuffer, size);
2509         memcpy (logbuffer->cursor, name, len);
2510         logbuffer->cursor += len;
2511
2512         EXIT_LOG_EXPLICIT (DO_SEND);
2513 }
2514
2515 /* ELF code crashes on some systems. */
2516 //#if defined(ELFMAG0)
2517 #if 0
2518
2519 #if SIZEOF_VOID_P == 4
2520 #define ELF_WSIZE 32
2521 #else
2522 #define ELF_WSIZE 64
2523 #endif
2524 #ifndef ElfW
2525 #define ElfW(type)      _ElfW (Elf, ELF_WSIZE, type)
2526 #define _ElfW(e,w,t)    _ElfW_1 (e, w, _##t)
2527 #define _ElfW_1(e,w,t)  e##w##t
2528 #endif
2529
2530 static void
2531 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2532 {
2533         int i;
2534         for (i = 0; i < num_symbols; ++i) {
2535                 const char* sym;
2536                 sym =  strtab + symbols [i].st_name;
2537                 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2538                         continue;
2539                 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2540                 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2541         }
2542 }
2543
2544 static int
2545 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2546 {
2547         int fd, i;
2548         void *data;
2549         struct stat statb;
2550         uint64_t file_size;
2551         ElfW(Ehdr) *header;
2552         ElfW(Shdr) *sheader;
2553         ElfW(Shdr) *shstrtabh;
2554         ElfW(Shdr) *symtabh = NULL;
2555         ElfW(Shdr) *strtabh = NULL;
2556         ElfW(Sym) *symbols = NULL;
2557         const char *strtab;
2558         int num_symbols;
2559
2560         fd = open (filename, O_RDONLY);
2561         if (fd < 0)
2562                 return 0;
2563         if (fstat (fd, &statb) != 0) {
2564                 close (fd);
2565                 return 0;
2566         }
2567         file_size = statb.st_size;
2568         data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2569         close (fd);
2570         if (data == MAP_FAILED)
2571                 return 0;
2572         header = data;
2573         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2574                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2575                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2576                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2577                 munmap (data, file_size);
2578                 return 0;
2579         }
2580         sheader = (void*)((char*)data + header->e_shoff);
2581         shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2582         strtab = (const char*)data + shstrtabh->sh_offset;
2583         for (i = 0; i < header->e_shnum; ++i) {
2584                 //printf ("section header: %d\n", sheader->sh_type);
2585                 if (sheader->sh_type == SHT_SYMTAB) {
2586                         symtabh = sheader;
2587                         strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2588                         /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2589                         break;
2590                 }
2591                 sheader = (void*)((char*)sheader + header->e_shentsize);
2592         }
2593         if (!symtabh || !strtabh) {
2594                 munmap (data, file_size);
2595                 return 0;
2596         }
2597         strtab = (const char*)data + strtabh->sh_offset;
2598         num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2599         symbols = (void*)((char*)data + symtabh->sh_offset);
2600         dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2601         munmap (data, file_size);
2602         return 1;
2603 }
2604 #endif
2605
2606 /* ELF code crashes on some systems. */
2607 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2608 #if 0
2609 static int
2610 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2611 {
2612         MonoProfiler *prof = data;
2613         char buf [256];
2614         const char *filename;
2615         BinaryObject *obj;
2616         char *a = (void*)info->dlpi_addr;
2617         int i, num_sym;
2618         ElfW(Dyn) *dyn = NULL;
2619         ElfW(Sym) *symtab = NULL;
2620         ElfW(Word) *hash_table = NULL;
2621         ElfW(Ehdr) *header = NULL;
2622         const char* strtab = NULL;
2623         for (obj = prof->binary_objects; obj; obj = obj->next) {
2624                 if (obj->addr == a)
2625                         return 0;
2626         }
2627         filename = info->dlpi_name;
2628         if (!filename)
2629                 return 0;
2630         if (!info->dlpi_addr && !filename [0]) {
2631                 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2632                 if (l > 0) {
2633                         buf [l] = 0;
2634                         filename = buf;
2635                 }
2636         }
2637         obj = g_calloc (sizeof (BinaryObject), 1);
2638         obj->addr = (void*)info->dlpi_addr;
2639         obj->name = pstrdup (filename);
2640         obj->next = prof->binary_objects;
2641         prof->binary_objects = obj;
2642         //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2643         a = NULL;
2644         for (i = 0; i < info->dlpi_phnum; ++i) {
2645                 //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);
2646                 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2647                         header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2648                         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2649                                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2650                                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2651                                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2652                                 header = NULL;
2653                         }
2654                         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);
2655                 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2656                         dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2657                 }
2658         }
2659         if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2660                 return 0;
2661         if (!info->dlpi_name || !info->dlpi_name[0])
2662                 return 0;
2663         if (!dyn)
2664                 return 0;
2665         for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2666                 if (dyn [i].d_tag == DT_SYMTAB) {
2667                         if (symtab && do_debug)
2668                                 printf ("multiple symtabs: %d\n", i);
2669                         symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2670                 } else if (dyn [i].d_tag == DT_HASH) {
2671                         hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2672                 } else if (dyn [i].d_tag == DT_STRTAB) {
2673                         strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2674                 }
2675         }
2676         if (!hash_table)
2677                 return 0;
2678         num_sym = hash_table [1];
2679         dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2680         return 0;
2681 }
2682
2683 static int
2684 load_binaries (MonoProfiler *prof)
2685 {
2686         dl_iterate_phdr (elf_dl_callback, prof);
2687         return 1;
2688 }
2689 #else
2690 static int
2691 load_binaries (MonoProfiler *prof)
2692 {
2693         return 0;
2694 }
2695 #endif
2696
2697 static const char*
2698 symbol_for (uintptr_t code)
2699 {
2700 #ifdef HAVE_DLADDR
2701         void *ip = (void*)code;
2702         Dl_info di;
2703         if (dladdr (ip, &di)) {
2704                 if (di.dli_sname)
2705                         return di.dli_sname;
2706         } else {
2707         /*      char **names;
2708                 names = backtrace_symbols (&ip, 1);
2709                 if (names) {
2710                         const char* p = names [0];
2711                         g_free (names);
2712                         return p;
2713                 }
2714                 */
2715         }
2716 #endif
2717         return NULL;
2718 }
2719
2720 static void
2721 dump_unmanaged_coderefs (MonoProfiler *prof)
2722 {
2723         int i;
2724         const char* last_symbol;
2725         uintptr_t addr, page_end;
2726
2727         if (load_binaries (prof))
2728                 return;
2729         for (i = 0; i < size_code_pages; ++i) {
2730                 const char* sym;
2731                 if (!code_pages [i] || code_pages [i] & 1)
2732                         continue;
2733                 last_symbol = NULL;
2734                 addr = CPAGE_ADDR (code_pages [i]);
2735                 page_end = addr + CPAGE_SIZE;
2736                 code_pages [i] |= 1;
2737                 /* we dump the symbols for the whole page */
2738                 for (; addr < page_end; addr += 16) {
2739                         sym = symbol_for (addr);
2740                         if (sym && sym == last_symbol)
2741                                 continue;
2742                         last_symbol = sym;
2743                         if (!sym)
2744                                 continue;
2745                         dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2746                         //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2747                 }
2748         }
2749 }
2750
2751 typedef struct MonoCounterAgent {
2752         MonoCounter *counter;
2753         // MonoCounterAgent specific data :
2754         void *value;
2755         size_t value_size;
2756         short index;
2757         short emitted;
2758         struct MonoCounterAgent *next;
2759 } MonoCounterAgent;
2760
2761 static MonoCounterAgent* counters;
2762 static int counters_index = 1;
2763 static mono_mutex_t counters_mutex;
2764
2765 static void
2766 counters_add_agent (MonoCounter *counter)
2767 {
2768         if (InterlockedRead (&in_shutdown))
2769                 return;
2770
2771         MonoCounterAgent *agent, *item;
2772
2773         mono_os_mutex_lock (&counters_mutex);
2774
2775         for (agent = counters; agent; agent = agent->next) {
2776                 if (agent->counter == counter) {
2777                         agent->value_size = 0;
2778                         if (agent->value) {
2779                                 g_free (agent->value);
2780                                 agent->value = NULL;
2781                         }
2782                         goto done;
2783                 }
2784         }
2785
2786         agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2787         agent->counter = counter;
2788         agent->value = NULL;
2789         agent->value_size = 0;
2790         agent->index = counters_index++;
2791         agent->emitted = 0;
2792         agent->next = NULL;
2793
2794         if (!counters) {
2795                 counters = agent;
2796         } else {
2797                 item = counters;
2798                 while (item->next)
2799                         item = item->next;
2800                 item->next = agent;
2801         }
2802
2803 done:
2804         mono_os_mutex_unlock (&counters_mutex);
2805 }
2806
2807 static mono_bool
2808 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2809 {
2810         counters_add_agent (counter);
2811         return TRUE;
2812 }
2813
2814 static void
2815 counters_init (MonoProfiler *profiler)
2816 {
2817         mono_os_mutex_init (&counters_mutex);
2818
2819         mono_counters_on_register (&counters_add_agent);
2820         mono_counters_foreach (counters_init_foreach_callback, NULL);
2821 }
2822
2823 static void
2824 counters_emit (MonoProfiler *profiler)
2825 {
2826         MonoCounterAgent *agent;
2827         int len = 0;
2828         int size =
2829                 EVENT_SIZE /* event */ +
2830                 LEB128_SIZE /* len */
2831         ;
2832
2833         mono_os_mutex_lock (&counters_mutex);
2834
2835         for (agent = counters; agent; agent = agent->next) {
2836                 if (agent->emitted)
2837                         continue;
2838
2839                 size +=
2840                         LEB128_SIZE /* section */ +
2841                         strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2842                         BYTE_SIZE /* type */ +
2843                         BYTE_SIZE /* unit */ +
2844                         BYTE_SIZE /* variance */ +
2845                         LEB128_SIZE /* index */
2846                 ;
2847
2848                 len++;
2849         }
2850
2851         if (!len)
2852                 goto done;
2853
2854         ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2855
2856         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2857         emit_value (logbuffer, len);
2858
2859         for (agent = counters; agent; agent = agent->next) {
2860                 const char *name;
2861
2862                 if (agent->emitted)
2863                         continue;
2864
2865                 name = mono_counter_get_name (agent->counter);
2866                 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2867                 emit_string (logbuffer, name, strlen (name) + 1);
2868                 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2869                 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2870                 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2871                 emit_value (logbuffer, agent->index);
2872
2873                 agent->emitted = 1;
2874         }
2875
2876         EXIT_LOG_EXPLICIT (DO_SEND);
2877
2878 done:
2879         mono_os_mutex_unlock (&counters_mutex);
2880 }
2881
2882 static void
2883 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2884 {
2885         MonoCounterAgent *agent;
2886         MonoCounter *counter;
2887         int type;
2888         int buffer_size;
2889         void *buffer;
2890         int size;
2891
2892         counters_emit (profiler);
2893
2894         buffer_size = 8;
2895         buffer = g_calloc (1, buffer_size);
2896
2897         mono_os_mutex_lock (&counters_mutex);
2898
2899         size =
2900                 EVENT_SIZE /* event */
2901         ;
2902
2903         for (agent = counters; agent; agent = agent->next) {
2904                 size +=
2905                         LEB128_SIZE /* index */ +
2906                         BYTE_SIZE /* type */ +
2907                         mono_counter_get_size (agent->counter) /* value */
2908                 ;
2909         }
2910
2911         size +=
2912                 LEB128_SIZE /* stop marker */
2913         ;
2914
2915         ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2916
2917         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2918
2919         for (agent = counters; agent; agent = agent->next) {
2920                 size_t size;
2921
2922                 counter = agent->counter;
2923
2924                 size = mono_counter_get_size (counter);
2925
2926                 if (size > buffer_size) {
2927                         buffer_size = size;
2928                         buffer = g_realloc (buffer, buffer_size);
2929                 }
2930
2931                 memset (buffer, 0, buffer_size);
2932
2933                 g_assert (mono_counters_sample (counter, buffer, size));
2934
2935                 type = mono_counter_get_type (counter);
2936
2937                 if (!agent->value) {
2938                         agent->value = g_calloc (1, size);
2939                         agent->value_size = size;
2940                 } else {
2941                         if (type == MONO_COUNTER_STRING) {
2942                                 if (strcmp (agent->value, buffer) == 0)
2943                                         continue;
2944                         } else {
2945                                 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2946                                         continue;
2947                         }
2948                 }
2949
2950                 emit_uvalue (logbuffer, agent->index);
2951                 emit_byte (logbuffer, type);
2952                 switch (type) {
2953                 case MONO_COUNTER_INT:
2954 #if SIZEOF_VOID_P == 4
2955                 case MONO_COUNTER_WORD:
2956 #endif
2957                         emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2958                         break;
2959                 case MONO_COUNTER_UINT:
2960                         emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2961                         break;
2962                 case MONO_COUNTER_TIME_INTERVAL:
2963                 case MONO_COUNTER_LONG:
2964 #if SIZEOF_VOID_P == 8
2965                 case MONO_COUNTER_WORD:
2966 #endif
2967                         emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2968                         break;
2969                 case MONO_COUNTER_ULONG:
2970                         emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2971                         break;
2972                 case MONO_COUNTER_DOUBLE:
2973                         emit_double (logbuffer, *(double*)buffer);
2974                         break;
2975                 case MONO_COUNTER_STRING:
2976                         if (size == 0) {
2977                                 emit_byte (logbuffer, 0);
2978                         } else {
2979                                 emit_byte (logbuffer, 1);
2980                                 emit_string (logbuffer, (char*)buffer, size);
2981                         }
2982                         break;
2983                 default:
2984                         g_assert_not_reached ();
2985                 }
2986
2987                 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
2988                         agent->value = g_realloc (agent->value, size);
2989                         agent->value_size = size;
2990                 }
2991
2992                 if (size > 0)
2993                         memcpy (agent->value, buffer, size);
2994         }
2995         g_free (buffer);
2996
2997         emit_value (logbuffer, 0);
2998
2999         EXIT_LOG_EXPLICIT (DO_SEND);
3000
3001         mono_os_mutex_unlock (&counters_mutex);
3002 }
3003
3004 typedef struct _PerfCounterAgent PerfCounterAgent;
3005 struct _PerfCounterAgent {
3006         PerfCounterAgent *next;
3007         int index;
3008         char *category_name;
3009         char *name;
3010         int type;
3011         gint64 value;
3012         guint8 emitted;
3013         guint8 updated;
3014         guint8 deleted;
3015 };
3016
3017 static PerfCounterAgent *perfcounters = NULL;
3018
3019 static void
3020 perfcounters_emit (MonoProfiler *profiler)
3021 {
3022         PerfCounterAgent *pcagent;
3023         int len = 0;
3024         int size =
3025                 EVENT_SIZE /* event */ +
3026                 LEB128_SIZE /* len */
3027         ;
3028
3029         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3030                 if (pcagent->emitted)
3031                         continue;
3032
3033                 size +=
3034                         LEB128_SIZE /* section */ +
3035                         strlen (pcagent->category_name) + 1 /* category name */ +
3036                         strlen (pcagent->name) + 1 /* name */ +
3037                         BYTE_SIZE /* type */ +
3038                         BYTE_SIZE /* unit */ +
3039                         BYTE_SIZE /* variance */ +
3040                         LEB128_SIZE /* index */
3041                 ;
3042
3043                 len++;
3044         }
3045
3046         if (!len)
3047                 return;
3048
3049         ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3050
3051         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3052         emit_value (logbuffer, len);
3053
3054         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3055                 if (pcagent->emitted)
3056                         continue;
3057
3058                 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3059                 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3060                 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3061                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3062                 emit_byte (logbuffer, MONO_COUNTER_RAW);
3063                 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3064                 emit_value (logbuffer, pcagent->index);
3065
3066                 pcagent->emitted = 1;
3067         }
3068
3069         EXIT_LOG_EXPLICIT (DO_SEND);
3070 }
3071
3072 static gboolean
3073 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3074 {
3075         PerfCounterAgent *pcagent;
3076
3077         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3078                 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3079                         continue;
3080                 if (pcagent->value == value)
3081                         return TRUE;
3082
3083                 pcagent->value = value;
3084                 pcagent->updated = 1;
3085                 pcagent->deleted = 0;
3086                 return TRUE;
3087         }
3088
3089         pcagent = g_new0 (PerfCounterAgent, 1);
3090         pcagent->next = perfcounters;
3091         pcagent->index = counters_index++;
3092         pcagent->category_name = g_strdup (category_name);
3093         pcagent->name = g_strdup (name);
3094         pcagent->type = (int) type;
3095         pcagent->value = value;
3096         pcagent->emitted = 0;
3097         pcagent->updated = 1;
3098         pcagent->deleted = 0;
3099
3100         perfcounters = pcagent;
3101
3102         return TRUE;
3103 }
3104
3105 static void
3106 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3107 {
3108         PerfCounterAgent *pcagent;
3109         int len = 0;
3110         int size;
3111
3112         mono_os_mutex_lock (&counters_mutex);
3113
3114         /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3115         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3116                 pcagent->deleted = 1;
3117
3118         mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3119
3120         perfcounters_emit (profiler);
3121
3122         size =
3123                 EVENT_SIZE /* event */
3124         ;
3125
3126         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3127                 if (pcagent->deleted || !pcagent->updated)
3128                         continue;
3129
3130                 size +=
3131                         LEB128_SIZE /* index */ +
3132                         BYTE_SIZE /* type */ +
3133                         LEB128_SIZE /* value */
3134                 ;
3135
3136                 len++;
3137         }
3138
3139         if (!len)
3140                 goto done;
3141
3142         size +=
3143                 LEB128_SIZE /* stop marker */
3144         ;
3145
3146         ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3147
3148         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3149
3150         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3151                 if (pcagent->deleted || !pcagent->updated)
3152                         continue;
3153                 emit_uvalue (logbuffer, pcagent->index);
3154                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3155                 emit_svalue (logbuffer, pcagent->value);
3156
3157                 pcagent->updated = 0;
3158         }
3159
3160         emit_value (logbuffer, 0);
3161
3162         EXIT_LOG_EXPLICIT (DO_SEND);
3163
3164 done:
3165         mono_os_mutex_unlock (&counters_mutex);
3166 }
3167
3168 static void
3169 counters_and_perfcounters_sample (MonoProfiler *prof)
3170 {
3171         uint64_t now = current_time ();
3172
3173         counters_sample (prof, now);
3174         perfcounters_sample (prof, now);
3175 }
3176
3177 #define COVERAGE_DEBUG(x) if (debug_coverage) {x}
3178 static mono_mutex_t coverage_mutex;
3179 static MonoConcurrentHashTable *coverage_methods = NULL;
3180 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3181 static MonoConcurrentHashTable *coverage_classes = NULL;
3182
3183 static MonoConcurrentHashTable *filtered_classes = NULL;
3184 static MonoConcurrentHashTable *entered_methods = NULL;
3185 static MonoConcurrentHashTable *image_to_methods = NULL;
3186 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3187 static gboolean coverage_initialized = FALSE;
3188
3189 static GPtrArray *coverage_data = NULL;
3190 static int previous_offset = 0;
3191
3192 typedef struct {
3193         MonoLockFreeQueueNode node;
3194         MonoMethod *method;
3195 } MethodNode;
3196
3197 typedef struct {
3198         int offset;
3199         int counter;
3200         char *filename;
3201         int line;
3202         int column;
3203 } CoverageEntry;
3204
3205 static void
3206 free_coverage_entry (gpointer data, gpointer userdata)
3207 {
3208         CoverageEntry *entry = (CoverageEntry *)data;
3209         g_free (entry->filename);
3210         g_free (entry);
3211 }
3212
3213 static void
3214 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfileCoverageEntry *entry)
3215 {
3216         int offset = entry->iloffset - previous_offset;
3217         CoverageEntry *e = g_new (CoverageEntry, 1);
3218
3219         previous_offset = entry->iloffset;
3220
3221         e->offset = offset;
3222         e->counter = entry->counter;
3223         e->filename = g_strdup(entry->filename ? entry->filename : "");
3224         e->line = entry->line;
3225         e->column = entry->col;
3226
3227         g_ptr_array_add (coverage_data, e);
3228 }
3229
3230 static char *
3231 parse_generic_type_names(char *name)
3232 {
3233         char *new_name, *ret;
3234         int within_generic_declaration = 0, generic_members = 1;
3235
3236         if (name == NULL || *name == '\0')
3237                 return g_strdup ("");
3238
3239         if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3240                 return NULL;
3241
3242         do {
3243                 switch (*name) {
3244                         case '<':
3245                                 within_generic_declaration = 1;
3246                                 break;
3247
3248                         case '>':
3249                                 within_generic_declaration = 0;
3250
3251                                 if (*(name - 1) != '<') {
3252                                         *new_name++ = '`';
3253                                         *new_name++ = '0' + generic_members;
3254                                 } else {
3255                                         memcpy (new_name, "&lt;&gt;", 8);
3256                                         new_name += 8;
3257                                 }
3258
3259                                 generic_members = 0;
3260                                 break;
3261
3262                         case ',':
3263                                 generic_members++;
3264                                 break;
3265
3266                         default:
3267                                 if (!within_generic_declaration)
3268                                         *new_name++ = *name;
3269
3270                                 break;
3271                 }
3272         } while (*name++);
3273
3274         return ret;
3275 }
3276
3277 static int method_id;
3278 static void
3279 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3280 {
3281         MonoMethod *method = (MonoMethod *)value;
3282         MonoProfiler *prof = (MonoProfiler *)userdata;
3283         MonoClass *klass;
3284         MonoImage *image;
3285         char *class_name;
3286         const char *image_name, *method_name, *sig, *first_filename;
3287         guint i;
3288
3289         previous_offset = 0;
3290         coverage_data = g_ptr_array_new ();
3291
3292         mono_profiler_coverage_get (prof, method, obtain_coverage_for_method);
3293
3294         klass = mono_method_get_class (method);
3295         image = mono_class_get_image (klass);
3296         image_name = mono_image_get_name (image);
3297
3298         sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3299         class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3300         method_name = mono_method_get_name (method);
3301
3302         if (coverage_data->len != 0) {
3303                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3304                 first_filename = entry->filename ? entry->filename : "";
3305         } else
3306                 first_filename = "";
3307
3308         image_name = image_name ? image_name : "";
3309         sig = sig ? sig : "";
3310         method_name = method_name ? method_name : "";
3311
3312         ENTER_LOG (&coverage_methods_ctr, logbuffer,
3313                 EVENT_SIZE /* event */ +
3314                 strlen (image_name) + 1 /* image name */ +
3315                 strlen (class_name) + 1 /* class name */ +
3316                 strlen (method_name) + 1 /* method name */ +
3317                 strlen (sig) + 1 /* signature */ +
3318                 strlen (first_filename) + 1 /* first file name */ +
3319                 LEB128_SIZE /* token */ +
3320                 LEB128_SIZE /* method id */ +
3321                 LEB128_SIZE /* entries */
3322         );
3323
3324         emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3325         emit_string (logbuffer, image_name, strlen (image_name) + 1);
3326         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3327         emit_string (logbuffer, method_name, strlen (method_name) + 1);
3328         emit_string (logbuffer, sig, strlen (sig) + 1);
3329         emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3330
3331         emit_uvalue (logbuffer, mono_method_get_token (method));
3332         emit_uvalue (logbuffer, method_id);
3333         emit_value (logbuffer, coverage_data->len);
3334
3335         EXIT_LOG_EXPLICIT (DO_SEND);
3336
3337         for (i = 0; i < coverage_data->len; i++) {
3338                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3339
3340                 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3341                         EVENT_SIZE /* event */ +
3342                         LEB128_SIZE /* method id */ +
3343                         LEB128_SIZE /* offset */ +
3344                         LEB128_SIZE /* counter */ +
3345                         LEB128_SIZE /* line */ +
3346                         LEB128_SIZE /* column */
3347                 );
3348
3349                 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3350                 emit_uvalue (logbuffer, method_id);
3351                 emit_uvalue (logbuffer, entry->offset);
3352                 emit_uvalue (logbuffer, entry->counter);
3353                 emit_uvalue (logbuffer, entry->line);
3354                 emit_uvalue (logbuffer, entry->column);
3355
3356                 EXIT_LOG_EXPLICIT (DO_SEND);
3357         }
3358
3359         method_id++;
3360
3361         g_free (class_name);
3362
3363         g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3364         g_ptr_array_free (coverage_data, TRUE);
3365         coverage_data = NULL;
3366 }
3367
3368 /* This empties the queue */
3369 static guint
3370 count_queue (MonoLockFreeQueue *queue)
3371 {
3372         MonoLockFreeQueueNode *node;
3373         guint count = 0;
3374
3375         while ((node = mono_lock_free_queue_dequeue (queue))) {
3376                 count++;
3377                 mono_thread_hazardous_try_free (node, g_free);
3378         }
3379
3380         return count;
3381 }
3382
3383 static void
3384 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3385 {
3386         MonoClass *klass = (MonoClass *)key;
3387         MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3388         MonoImage *image;
3389         char *class_name;
3390         const char *assembly_name;
3391         int number_of_methods, partially_covered;
3392         guint fully_covered;
3393
3394         image = mono_class_get_image (klass);
3395         assembly_name = mono_image_get_name (image);
3396         class_name = mono_type_get_name (mono_class_get_type (klass));
3397
3398         assembly_name = assembly_name ? assembly_name : "";
3399         number_of_methods = mono_class_num_methods (klass);
3400         fully_covered = count_queue (class_methods);
3401         /* We don't handle partial covered yet */
3402         partially_covered = 0;
3403
3404         ENTER_LOG (&coverage_classes_ctr, logbuffer,
3405                 EVENT_SIZE /* event */ +
3406                 strlen (assembly_name) + 1 /* assembly name */ +
3407                 strlen (class_name) + 1 /* class name */ +
3408                 LEB128_SIZE /* no. methods */ +
3409                 LEB128_SIZE /* fully covered */ +
3410                 LEB128_SIZE /* partially covered */
3411         );
3412
3413         emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3414         emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3415         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3416         emit_uvalue (logbuffer, number_of_methods);
3417         emit_uvalue (logbuffer, fully_covered);
3418         emit_uvalue (logbuffer, partially_covered);
3419
3420         EXIT_LOG_EXPLICIT (DO_SEND);
3421
3422         g_free (class_name);
3423 }
3424
3425 static void
3426 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3427 {
3428         MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3429
3430         *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3431         if (image_methods)
3432                 *fully_covered = count_queue (image_methods);
3433         else
3434                 *fully_covered = 0;
3435
3436         // FIXME: We don't handle partially covered yet.
3437         *partially_covered = 0;
3438 }
3439
3440 static void
3441 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3442 {
3443         MonoAssembly *assembly = (MonoAssembly *)value;
3444         MonoImage *image = mono_assembly_get_image (assembly);
3445         const char *name, *guid, *filename;
3446         int number_of_methods = 0, partially_covered = 0;
3447         guint fully_covered = 0;
3448
3449         name = mono_image_get_name (image);
3450         guid = mono_image_get_guid (image);
3451         filename = mono_image_get_filename (image);
3452
3453         name = name ? name : "";
3454         guid = guid ? guid : "";
3455         filename = filename ? filename : "";
3456
3457         get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3458
3459         ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3460                 EVENT_SIZE /* event */ +
3461                 strlen (name) + 1 /* name */ +
3462                 strlen (guid) + 1 /* guid */ +
3463                 strlen (filename) + 1 /* file name */ +
3464                 LEB128_SIZE /* no. methods */ +
3465                 LEB128_SIZE /* fully covered */ +
3466                 LEB128_SIZE /* partially covered */
3467         );
3468
3469         emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3470         emit_string (logbuffer, name, strlen (name) + 1);
3471         emit_string (logbuffer, guid, strlen (guid) + 1);
3472         emit_string (logbuffer, filename, strlen (filename) + 1);
3473         emit_uvalue (logbuffer, number_of_methods);
3474         emit_uvalue (logbuffer, fully_covered);
3475         emit_uvalue (logbuffer, partially_covered);
3476
3477         EXIT_LOG_EXPLICIT (DO_SEND);
3478 }
3479
3480 static void
3481 dump_coverage (MonoProfiler *prof)
3482 {
3483         if (!coverage_initialized)
3484                 return;
3485
3486         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Started dump\n");)
3487         method_id = 0;
3488
3489         mono_os_mutex_lock (&coverage_mutex);
3490         mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3491         mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3492         mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3493         mono_os_mutex_unlock (&coverage_mutex);
3494
3495         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Finished dump\n");)
3496 }
3497
3498 static void
3499 process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method)
3500 {
3501         MonoClass *klass;
3502         MonoImage *image;
3503
3504         if (!coverage_initialized)
3505                 return;
3506
3507         klass = mono_method_get_class (method);
3508         image = mono_class_get_image (klass);
3509
3510         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)))
3511                 return;
3512
3513         mono_os_mutex_lock (&coverage_mutex);
3514         mono_conc_hashtable_insert (entered_methods, method, method);
3515         mono_os_mutex_unlock (&coverage_mutex);
3516 }
3517
3518 static MonoLockFreeQueueNode *
3519 create_method_node (MonoMethod *method)
3520 {
3521         MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3522         mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3523         node->method = method;
3524
3525         return (MonoLockFreeQueueNode *) node;
3526 }
3527
3528 static gboolean
3529 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3530 {
3531         MonoError error;
3532         MonoClass *klass;
3533         MonoImage *image;
3534         MonoAssembly *assembly;
3535         MonoMethodHeader *header;
3536         guint32 iflags, flags, code_size;
3537         char *fqn, *classname;
3538         gboolean has_positive, found;
3539         MonoLockFreeQueue *image_methods, *class_methods;
3540         MonoLockFreeQueueNode *node;
3541
3542         g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3543
3544         COVERAGE_DEBUG(fprintf (stderr, "Coverage filter for %s\n", mono_method_get_name (method));)
3545
3546         flags = mono_method_get_flags (method, &iflags);
3547         if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3548             (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/)) {
3549                 COVERAGE_DEBUG(fprintf (stderr, "   Internal call or pinvoke - ignoring\n");)
3550                 return FALSE;
3551         }
3552
3553         // Don't need to do anything else if we're already tracking this method
3554         if (mono_conc_hashtable_lookup (coverage_methods, method)) {
3555                 COVERAGE_DEBUG(fprintf (stderr, "   Already tracking\n");)
3556                 return TRUE;
3557         }
3558
3559         klass = mono_method_get_class (method);
3560         image = mono_class_get_image (klass);
3561
3562         // Don't handle coverage for the core assemblies
3563         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3564                 return FALSE;
3565
3566         if (prof->coverage_filters) {
3567                 /* Check already filtered classes first */
3568                 if (mono_conc_hashtable_lookup (filtered_classes, klass)) {
3569                         COVERAGE_DEBUG(fprintf (stderr, "   Already filtered\n");)
3570                         return FALSE;
3571                 }
3572
3573                 classname = mono_type_get_name (mono_class_get_type (klass));
3574
3575                 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3576
3577                 COVERAGE_DEBUG(fprintf (stderr, "   Looking for %s in filter\n", fqn);)
3578                 // Check positive filters first
3579                 has_positive = FALSE;
3580                 found = FALSE;
3581                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3582                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3583
3584                         if (filter [0] == '+') {
3585                                 filter = &filter [1];
3586
3587                                 COVERAGE_DEBUG(fprintf (stderr, "   Checking against +%s ...", filter);)
3588
3589                                 if (strstr (fqn, filter) != NULL) {
3590                                         COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3591                                         found = TRUE;
3592                                 } else
3593                                         COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3594
3595                                 has_positive = TRUE;
3596                         }
3597                 }
3598
3599                 if (has_positive && !found) {
3600                         COVERAGE_DEBUG(fprintf (stderr, "   Positive match was not found\n");)
3601
3602                         mono_os_mutex_lock (&coverage_mutex);
3603                         mono_conc_hashtable_insert (filtered_classes, klass, klass);
3604                         mono_os_mutex_unlock (&coverage_mutex);
3605                         g_free (fqn);
3606                         g_free (classname);
3607
3608                         return FALSE;
3609                 }
3610
3611                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3612                         // FIXME: Is substring search sufficient?
3613                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3614                         if (filter [0] == '+')
3615                                 continue;
3616
3617                         // Skip '-'
3618                         filter = &filter [1];
3619                         COVERAGE_DEBUG(fprintf (stderr, "   Checking against -%s ...", filter);)
3620
3621                         if (strstr (fqn, filter) != NULL) {
3622                                 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3623
3624                                 mono_os_mutex_lock (&coverage_mutex);
3625                                 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3626                                 mono_os_mutex_unlock (&coverage_mutex);
3627                                 g_free (fqn);
3628                                 g_free (classname);
3629
3630                                 return FALSE;
3631                         } else
3632                                 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3633
3634                 }
3635
3636                 g_free (fqn);
3637                 g_free (classname);
3638         }
3639
3640         COVERAGE_DEBUG(fprintf (stderr, "   Handling coverage for %s\n", mono_method_get_name (method));)
3641         header = mono_method_get_header_checked (method, &error);
3642         mono_error_cleanup (&error);
3643
3644         mono_method_header_get_code (header, &code_size, NULL);
3645
3646         assembly = mono_image_get_assembly (image);
3647
3648         // Need to keep the assemblies around for as long as they are kept in the hashtable
3649         // Nunit, for example, has a habit of unloading them before the coverage statistics are
3650         // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3651         mono_assembly_addref (assembly);
3652
3653         mono_os_mutex_lock (&coverage_mutex);
3654         mono_conc_hashtable_insert (coverage_methods, method, method);
3655         mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3656         mono_os_mutex_unlock (&coverage_mutex);
3657
3658         image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3659
3660         if (image_methods == NULL) {
3661                 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3662                 mono_lock_free_queue_init (image_methods);
3663                 mono_os_mutex_lock (&coverage_mutex);
3664                 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3665                 mono_os_mutex_unlock (&coverage_mutex);
3666         }
3667
3668         node = create_method_node (method);
3669         mono_lock_free_queue_enqueue (image_methods, node);
3670
3671         class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3672
3673         if (class_methods == NULL) {
3674                 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3675                 mono_lock_free_queue_init (class_methods);
3676                 mono_os_mutex_lock (&coverage_mutex);
3677                 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3678                 mono_os_mutex_unlock (&coverage_mutex);
3679         }
3680
3681         node = create_method_node (method);
3682         mono_lock_free_queue_enqueue (class_methods, node);
3683
3684         return TRUE;
3685 }
3686
3687 #define LINE_BUFFER_SIZE 4096
3688 /* Max file limit of 128KB */
3689 #define MAX_FILE_SIZE 128 * 1024
3690 static char *
3691 get_file_content (FILE *stream)
3692 {
3693         char *buffer;
3694         ssize_t bytes_read;
3695         long filesize;
3696         int res, offset = 0;
3697
3698         res = fseek (stream, 0, SEEK_END);
3699         if (res < 0)
3700           return NULL;
3701
3702         filesize = ftell (stream);
3703         if (filesize < 0)
3704           return NULL;
3705
3706         res = fseek (stream, 0, SEEK_SET);
3707         if (res < 0)
3708           return NULL;
3709
3710         if (filesize > MAX_FILE_SIZE)
3711           return NULL;
3712
3713         buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3714         while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3715                 offset += bytes_read;
3716
3717         /* NULL terminate our buffer */
3718         buffer[filesize] = '\0';
3719         return buffer;
3720 }
3721
3722 static char *
3723 get_next_line (char *contents, char **next_start)
3724 {
3725         char *p = contents;
3726
3727         if (p == NULL || *p == '\0') {
3728                 *next_start = NULL;
3729                 return NULL;
3730         }
3731
3732         while (*p != '\n' && *p != '\0')
3733                 p++;
3734
3735         if (*p == '\n') {
3736                 *p = '\0';
3737                 *next_start = p + 1;
3738         } else
3739                 *next_start = NULL;
3740
3741         return contents;
3742 }
3743
3744 static void
3745 init_suppressed_assemblies (void)
3746 {
3747         char *content;
3748         char *line;
3749         FILE *sa_file;
3750
3751         suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3752         sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3753         if (sa_file == NULL)
3754                 return;
3755
3756         /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3757         content = get_file_content (sa_file);
3758         if (content == NULL) {
3759                 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3760         }
3761
3762         while ((line = get_next_line (content, &content))) {
3763                 line = g_strchomp (g_strchug (line));
3764                 /* No locking needed as we're doing initialization */
3765                 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3766         }
3767
3768         fclose (sa_file);
3769 }
3770
3771 static void
3772 parse_cov_filter_file (GPtrArray *filters, const char *file)
3773 {
3774         FILE *filter_file;
3775         char *line, *content;
3776
3777         filter_file = fopen (file, "r");
3778         if (filter_file == NULL) {
3779                 fprintf (stderr, "Unable to open %s\n", file);
3780                 return;
3781         }
3782
3783         /* Don't need to free content as it is referred to by the lines stored in @filters */
3784         content = get_file_content (filter_file);
3785         if (content == NULL)
3786                 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3787
3788         while ((line = get_next_line (content, &content)))
3789                 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3790
3791         fclose (filter_file);
3792 }
3793
3794 static void
3795 coverage_init (MonoProfiler *prof)
3796 {
3797         g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3798
3799         COVERAGE_DEBUG(fprintf (stderr, "Coverage initialized\n");)
3800
3801         mono_os_mutex_init (&coverage_mutex);
3802         coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3803         coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3804         coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3805         filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3806         entered_methods = mono_conc_hashtable_new (NULL, NULL);
3807         image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3808         init_suppressed_assemblies ();
3809
3810         coverage_initialized = TRUE;
3811 }
3812
3813 static void
3814 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3815 {
3816         MonoAssembly *assembly = (MonoAssembly *)value;
3817         mono_assembly_close (assembly);
3818 }
3819
3820 static void
3821 free_sample_hit (gpointer p)
3822 {
3823         mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3824 }
3825
3826 static void
3827 cleanup_reusable_samples (MonoProfiler *prof)
3828 {
3829         SampleHit *sample;
3830
3831         while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3832                 mono_thread_hazardous_try_free (sample, free_sample_hit);
3833 }
3834
3835 static void
3836 log_shutdown (MonoProfiler *prof)
3837 {
3838         InterlockedWrite (&in_shutdown, 1);
3839
3840         if (!no_counters)
3841                 counters_and_perfcounters_sample (prof);
3842
3843         dump_coverage (prof);
3844
3845         char c = 1;
3846
3847         if (write (prof->pipes [1], &c, 1) != 1) {
3848                 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3849                 exit (1);
3850         }
3851
3852         mono_native_thread_join (prof->helper_thread);
3853
3854         mono_os_mutex_destroy (&counters_mutex);
3855
3856         MonoCounterAgent *mc_next;
3857
3858         for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3859                 mc_next = cur->next;
3860                 g_free (cur);
3861         }
3862
3863         PerfCounterAgent *pc_next;
3864
3865         for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3866                 pc_next = cur->next;
3867                 g_free (cur);
3868         }
3869
3870         /*
3871          * Ensure that we empty the LLS completely, even if some nodes are
3872          * not immediately removed upon calling mono_lls_remove (), by
3873          * iterating until the head is NULL.
3874          */
3875         while (profiler_thread_list.head) {
3876                 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3877                         g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3878
3879                         remove_thread (thread);
3880                 } MONO_LLS_FOREACH_SAFE_END
3881         }
3882
3883         /*
3884          * Ensure that all threads have been freed, so that we don't miss any
3885          * buffers when we shut down the writer thread below.
3886          */
3887         mono_thread_hazardous_try_free_all ();
3888
3889         InterlockedWrite (&prof->run_dumper_thread, 0);
3890         mono_os_sem_post (&prof->dumper_queue_sem);
3891         mono_native_thread_join (prof->dumper_thread);
3892         mono_os_sem_destroy (&prof->dumper_queue_sem);
3893
3894         InterlockedWrite (&prof->run_writer_thread, 0);
3895         mono_os_sem_post (&prof->writer_queue_sem);
3896         mono_native_thread_join (prof->writer_thread);
3897         mono_os_sem_destroy (&prof->writer_queue_sem);
3898
3899         /*
3900          * Free all writer queue entries, and ensure that all sample hits will be
3901          * added to the sample reuse queue.
3902          */
3903         mono_thread_hazardous_try_free_all ();
3904
3905         cleanup_reusable_samples (prof);
3906
3907         /*
3908          * Finally, make sure that all sample hits are freed. This should cover all
3909          * hazardous data from the profiler. We can now be sure that the runtime
3910          * won't later invoke free functions in the profiler library after it has
3911          * been unloaded.
3912          */
3913         mono_thread_hazardous_try_free_all ();
3914
3915         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why is the reader count still non-zero?");
3916         g_assert (!InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why does someone still hold the exclusive lock?");
3917
3918 #if defined (HAVE_SYS_ZLIB)
3919         if (prof->gzfile)
3920                 gzclose (prof->gzfile);
3921 #endif
3922         if (prof->pipe_output)
3923                 pclose (prof->file);
3924         else
3925                 fclose (prof->file);
3926
3927         mono_conc_hashtable_destroy (prof->method_table);
3928         mono_os_mutex_destroy (&prof->method_table_mutex);
3929
3930         if (coverage_initialized) {
3931                 mono_os_mutex_lock (&coverage_mutex);
3932                 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3933                 mono_os_mutex_unlock (&coverage_mutex);
3934
3935                 mono_conc_hashtable_destroy (coverage_methods);
3936                 mono_conc_hashtable_destroy (coverage_assemblies);
3937                 mono_conc_hashtable_destroy (coverage_classes);
3938                 mono_conc_hashtable_destroy (filtered_classes);
3939
3940                 mono_conc_hashtable_destroy (entered_methods);
3941                 mono_conc_hashtable_destroy (image_to_methods);
3942                 mono_conc_hashtable_destroy (suppressed_assemblies);
3943                 mono_os_mutex_destroy (&coverage_mutex);
3944         }
3945
3946         PROF_TLS_FREE ();
3947
3948         g_free (prof->args);
3949         g_free (prof);
3950 }
3951
3952 static char*
3953 new_filename (const char* filename)
3954 {
3955         time_t t = time (NULL);
3956         int pid = process_id ();
3957         char pid_buf [16];
3958         char time_buf [16];
3959         char *res, *d;
3960         const char *p;
3961         int count_dates = 0;
3962         int count_pids = 0;
3963         int s_date, s_pid;
3964         struct tm *ts;
3965         for (p = filename; *p; p++) {
3966                 if (*p != '%')
3967                         continue;
3968                 p++;
3969                 if (*p == 't')
3970                         count_dates++;
3971                 else if (*p == 'p')
3972                         count_pids++;
3973                 else if (*p == 0)
3974                         break;
3975         }
3976         if (!count_dates && !count_pids)
3977                 return pstrdup (filename);
3978         snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3979         ts = gmtime (&t);
3980         snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3981                 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3982         s_date = strlen (time_buf);
3983         s_pid = strlen (pid_buf);
3984         d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3985         for (p = filename; *p; p++) {
3986                 if (*p != '%') {
3987                         *d++ = *p;
3988                         continue;
3989                 }
3990                 p++;
3991                 if (*p == 't') {
3992                         strcpy (d, time_buf);
3993                         d += s_date;
3994                         continue;
3995                 } else if (*p == 'p') {
3996                         strcpy (d, pid_buf);
3997                         d += s_pid;
3998                         continue;
3999                 } else if (*p == '%') {
4000                         *d++ = '%';
4001                         continue;
4002                 } else if (*p == 0)
4003                         break;
4004                 *d++ = '%';
4005                 *d++ = *p;
4006         }
4007         *d = 0;
4008         return res;
4009 }
4010
4011 static void
4012 add_to_fd_set (fd_set *set, int fd, int *max_fd)
4013 {
4014         /*
4015          * This should only trigger for the basic FDs (server socket, pipes) at
4016          * startup if for some mysterious reason they're too large. In this case,
4017          * the profiler really can't function, and we're better off printing an
4018          * error and exiting.
4019          */
4020         if (fd >= FD_SETSIZE) {
4021                 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4022                 exit (1);
4023         }
4024
4025         FD_SET (fd, set);
4026
4027         if (*max_fd < fd)
4028                 *max_fd = fd;
4029 }
4030
4031 static void *
4032 helper_thread (void *arg)
4033 {
4034         MonoProfiler *prof = (MonoProfiler *) arg;
4035
4036         mono_threads_attach_tools_thread ();
4037         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4038
4039         MonoProfilerThread *thread = init_thread (prof, FALSE);
4040
4041         GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4042
4043         while (1) {
4044                 fd_set rfds;
4045                 int max_fd = -1;
4046
4047                 FD_ZERO (&rfds);
4048
4049                 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4050                 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4051
4052                 for (gint i = 0; i < command_sockets->len; i++)
4053                         add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4054
4055                 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4056
4057                 // Sleep for 1sec or until a file descriptor has data.
4058                 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4059                         if (errno == EINTR)
4060                                 continue;
4061
4062                         fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4063                         exit (1);
4064                 }
4065
4066                 if (!no_counters)
4067                         counters_and_perfcounters_sample (prof);
4068
4069                 buffer_lock_excl ();
4070
4071                 sync_point (SYNC_POINT_PERIODIC);
4072
4073                 buffer_unlock_excl ();
4074
4075                 // Are we shutting down?
4076                 if (FD_ISSET (prof->pipes [0], &rfds)) {
4077                         char c;
4078                         read (prof->pipes [0], &c, 1);
4079                         break;
4080                 }
4081
4082                 for (gint i = 0; i < command_sockets->len; i++) {
4083                         int fd = g_array_index (command_sockets, int, i);
4084
4085                         if (!FD_ISSET (fd, &rfds))
4086                                 continue;
4087
4088                         char buf [64];
4089                         int len = read (fd, buf, sizeof (buf) - 1);
4090
4091                         if (len == -1)
4092                                 continue;
4093
4094                         if (!len) {
4095                                 // The other end disconnected.
4096                                 g_array_remove_index (command_sockets, i);
4097                                 close (fd);
4098
4099                                 continue;
4100                         }
4101
4102                         buf [len] = 0;
4103
4104                         if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4105                                 // Rely on the finalization callback triggering a GC.
4106                                 heapshot_requested = 1;
4107                                 mono_gc_finalize_notify ();
4108                         }
4109                 }
4110
4111                 if (FD_ISSET (prof->server_socket, &rfds)) {
4112                         int fd = accept (prof->server_socket, NULL, NULL);
4113
4114                         if (fd != -1) {
4115                                 if (fd >= FD_SETSIZE)
4116                                         close (fd);
4117                                 else
4118                                         g_array_append_val (command_sockets, fd);
4119                         }
4120                 }
4121         }
4122
4123         for (gint i = 0; i < command_sockets->len; i++)
4124                 close (g_array_index (command_sockets, int, i));
4125
4126         g_array_free (command_sockets, TRUE);
4127
4128         send_log_unsafe (FALSE);
4129         deinit_thread (thread);
4130
4131         mono_thread_info_detach ();
4132
4133         return NULL;
4134 }
4135
4136 static void
4137 start_helper_thread (MonoProfiler* prof)
4138 {
4139         if (pipe (prof->pipes) == -1) {
4140                 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4141                 exit (1);
4142         }
4143
4144         prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4145
4146         if (prof->server_socket == -1) {
4147                 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4148                 exit (1);
4149         }
4150
4151         struct sockaddr_in server_address;
4152
4153         memset (&server_address, 0, sizeof (server_address));
4154         server_address.sin_family = AF_INET;
4155         server_address.sin_addr.s_addr = INADDR_ANY;
4156         server_address.sin_port = htons (prof->command_port);
4157
4158         if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4159                 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4160                 close (prof->server_socket);
4161                 exit (1);
4162         }
4163
4164         if (listen (prof->server_socket, 1) == -1) {
4165                 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4166                 close (prof->server_socket);
4167                 exit (1);
4168         }
4169
4170         socklen_t slen = sizeof (server_address);
4171
4172         if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4173                 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4174                 close (prof->server_socket);
4175                 exit (1);
4176         }
4177
4178         prof->command_port = ntohs (server_address.sin_port);
4179
4180         if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4181                 fprintf (stderr, "Could not start helper thread\n");
4182                 close (prof->server_socket);
4183                 exit (1);
4184         }
4185 }
4186
4187 static void
4188 free_writer_entry (gpointer p)
4189 {
4190         mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4191 }
4192
4193 static gboolean
4194 handle_writer_queue_entry (MonoProfiler *prof)
4195 {
4196         WriterQueueEntry *entry;
4197
4198         if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4199                 if (!entry->methods)
4200                         goto no_methods;
4201
4202                 gboolean wrote_methods = FALSE;
4203
4204                 /*
4205                  * Encode the method events in a temporary log buffer that we
4206                  * flush to disk before the main buffer, ensuring that all
4207                  * methods have metadata emitted before they're referenced.
4208                  *
4209                  * We use a 'proper' thread-local buffer for this as opposed
4210                  * to allocating and freeing a buffer by hand because the call
4211                  * to mono_method_full_name () below may trigger class load
4212                  * events when it retrieves the signature of the method. So a
4213                  * thread-local buffer needs to exist when such events occur.
4214                  */
4215                 for (guint i = 0; i < entry->methods->len; i++) {
4216                         MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4217
4218                         if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4219                                 goto free_info; // This method already has metadata emitted.
4220
4221                         /*
4222                          * Other threads use this hash table to get a general
4223                          * idea of whether a method has already been emitted to
4224                          * the stream. Due to the way we add to this table, it
4225                          * can easily happen that multiple threads queue up the
4226                          * same methods, but that's OK since eventually all
4227                          * methods will be in this table and the thread-local
4228                          * method lists will just be empty for the rest of the
4229                          * app's lifetime.
4230                          */
4231                         mono_os_mutex_lock (&prof->method_table_mutex);
4232                         mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4233                         mono_os_mutex_unlock (&prof->method_table_mutex);
4234
4235                         char *name = mono_method_full_name (info->method, 1);
4236                         int nlen = strlen (name) + 1;
4237                         void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4238                         int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4239
4240                         ENTER_LOG (&method_jits_ctr, logbuffer,
4241                                 EVENT_SIZE /* event */ +
4242                                 LEB128_SIZE /* method */ +
4243                                 LEB128_SIZE /* start */ +
4244                                 LEB128_SIZE /* size */ +
4245                                 nlen /* name */
4246                         );
4247
4248                         emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4249                         emit_method_inner (logbuffer, info->method);
4250                         emit_ptr (logbuffer, cstart);
4251                         emit_value (logbuffer, csize);
4252
4253                         memcpy (logbuffer->cursor, name, nlen);
4254                         logbuffer->cursor += nlen;
4255
4256                         EXIT_LOG_EXPLICIT (NO_SEND);
4257
4258                         mono_free (name);
4259
4260                         wrote_methods = TRUE;
4261
4262                 free_info:
4263                         g_free (info);
4264                 }
4265
4266                 g_ptr_array_free (entry->methods, TRUE);
4267
4268                 if (wrote_methods) {
4269                         MonoProfilerThread *thread = PROF_TLS_GET ();
4270
4271                         dump_buffer_threadless (prof, thread->buffer);
4272                         init_buffer_state (thread);
4273                 }
4274
4275         no_methods:
4276                 dump_buffer (prof, entry->buffer);
4277
4278                 mono_thread_hazardous_try_free (entry, free_writer_entry);
4279
4280                 return TRUE;
4281         }
4282
4283         return FALSE;
4284 }
4285
4286 static void *
4287 writer_thread (void *arg)
4288 {
4289         MonoProfiler *prof = (MonoProfiler *)arg;
4290
4291         mono_threads_attach_tools_thread ();
4292         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4293
4294         dump_header (prof);
4295
4296         MonoProfilerThread *thread = init_thread (prof, FALSE);
4297
4298         while (InterlockedRead (&prof->run_writer_thread)) {
4299                 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4300                 handle_writer_queue_entry (prof);
4301         }
4302
4303         /* Drain any remaining entries on shutdown. */
4304         while (handle_writer_queue_entry (prof));
4305
4306         free_buffer (thread->buffer, thread->buffer->size);
4307         deinit_thread (thread);
4308
4309         mono_thread_info_detach ();
4310
4311         return NULL;
4312 }
4313
4314 static void
4315 start_writer_thread (MonoProfiler* prof)
4316 {
4317         InterlockedWrite (&prof->run_writer_thread, 1);
4318
4319         if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4320                 fprintf (stderr, "Could not start writer thread\n");
4321                 exit (1);
4322         }
4323 }
4324
4325 static void
4326 reuse_sample_hit (gpointer p)
4327 {
4328         SampleHit *sample = p;
4329
4330         mono_lock_free_queue_node_unpoison (&sample->node);
4331         mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4332 }
4333
4334 static gboolean
4335 handle_dumper_queue_entry (MonoProfiler *prof)
4336 {
4337         SampleHit *sample;
4338
4339         if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4340                 for (int i = 0; i < sample->count; ++i) {
4341                         MonoMethod *method = sample->frames [i].method;
4342                         MonoDomain *domain = sample->frames [i].domain;
4343                         void *address = sample->frames [i].base_address;
4344
4345                         if (!method) {
4346                                 g_assert (domain && "What happened to the domain pointer?");
4347                                 g_assert (address && "What happened to the instruction pointer?");
4348
4349                                 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4350
4351                                 if (ji)
4352                                         sample->frames [i].method = mono_jit_info_get_method (ji);
4353                         }
4354                 }
4355
4356                 ENTER_LOG (&sample_hits_ctr, logbuffer,
4357                         EVENT_SIZE /* event */ +
4358                         BYTE_SIZE /* type */ +
4359                         LEB128_SIZE /* tid */ +
4360                         LEB128_SIZE /* count */ +
4361                         1 * (
4362                                 LEB128_SIZE /* ip */
4363                         ) +
4364                         LEB128_SIZE /* managed count */ +
4365                         sample->count * (
4366                                 LEB128_SIZE /* method */
4367                         )
4368                 );
4369
4370                 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4371                 emit_byte (logbuffer, SAMPLE_CYCLES);
4372                 emit_ptr (logbuffer, (void *) sample->tid);
4373                 emit_value (logbuffer, 1);
4374
4375                 // TODO: Actual native unwinding.
4376                 for (int i = 0; i < 1; ++i) {
4377                         emit_ptr (logbuffer, sample->ip);
4378                         add_code_pointer ((uintptr_t) sample->ip);
4379                 }
4380
4381                 /* new in data version 6 */
4382                 emit_uvalue (logbuffer, sample->count);
4383
4384                 for (int i = 0; i < sample->count; ++i)
4385                         emit_method (logbuffer, sample->frames [i].method);
4386
4387                 EXIT_LOG_EXPLICIT (DO_SEND);
4388
4389                 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4390
4391                 dump_unmanaged_coderefs (prof);
4392         }
4393
4394         return FALSE;
4395 }
4396
4397 static void *
4398 dumper_thread (void *arg)
4399 {
4400         MonoProfiler *prof = (MonoProfiler *)arg;
4401
4402         mono_threads_attach_tools_thread ();
4403         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4404
4405         MonoProfilerThread *thread = init_thread (prof, FALSE);
4406
4407         while (InterlockedRead (&prof->run_dumper_thread)) {
4408                 /*
4409                  * Flush samples every second so it doesn't seem like the profiler is
4410                  * not working if the program is mostly idle.
4411                  */
4412                 if (mono_os_sem_timedwait (&prof->dumper_queue_sem, 1000, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_TIMEDOUT)
4413                         send_log_unsafe (FALSE);
4414
4415                 handle_dumper_queue_entry (prof);
4416         }
4417
4418         /* Drain any remaining entries on shutdown. */
4419         while (handle_dumper_queue_entry (prof));
4420
4421         send_log_unsafe (FALSE);
4422         deinit_thread (thread);
4423
4424         mono_thread_info_detach ();
4425
4426         return NULL;
4427 }
4428
4429 static void
4430 start_dumper_thread (MonoProfiler* prof)
4431 {
4432         InterlockedWrite (&prof->run_dumper_thread, 1);
4433
4434         if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4435                 fprintf (stderr, "Could not start dumper thread\n");
4436                 exit (1);
4437         }
4438 }
4439
4440 static void
4441 register_counter (const char *name, gint32 *counter)
4442 {
4443         mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4444 }
4445
4446 static void
4447 runtime_initialized (MonoProfiler *profiler)
4448 {
4449         InterlockedWrite (&runtime_inited, 1);
4450
4451         register_counter ("Sample events allocated", &sample_allocations_ctr);
4452         register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4453
4454         register_counter ("Event: Sync points", &sync_points_ctr);
4455         register_counter ("Event: Heap objects", &heap_objects_ctr);
4456         register_counter ("Event: Heap starts", &heap_starts_ctr);
4457         register_counter ("Event: Heap ends", &heap_ends_ctr);
4458         register_counter ("Event: Heap roots", &heap_roots_ctr);
4459         register_counter ("Event: GC events", &gc_events_ctr);
4460         register_counter ("Event: GC resizes", &gc_resizes_ctr);
4461         register_counter ("Event: GC allocations", &gc_allocs_ctr);
4462         register_counter ("Event: GC moves", &gc_moves_ctr);
4463         register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4464         register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4465         register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4466         register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4467         register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4468         register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4469         register_counter ("Event: Image loads", &image_loads_ctr);
4470         register_counter ("Event: Image unloads", &image_unloads_ctr);
4471         register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4472         register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4473         register_counter ("Event: Class loads", &class_loads_ctr);
4474         register_counter ("Event: Class unloads", &class_unloads_ctr);
4475         register_counter ("Event: Method entries", &method_entries_ctr);
4476         register_counter ("Event: Method exits", &method_exits_ctr);
4477         register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4478         register_counter ("Event: Method JITs", &method_jits_ctr);
4479         register_counter ("Event: Code buffers", &code_buffers_ctr);
4480         register_counter ("Event: Exception throws", &exception_throws_ctr);
4481         register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4482         register_counter ("Event: Monitor events", &monitor_events_ctr);
4483         register_counter ("Event: Thread starts", &thread_starts_ctr);
4484         register_counter ("Event: Thread ends", &thread_ends_ctr);
4485         register_counter ("Event: Thread names", &thread_names_ctr);
4486         register_counter ("Event: Domain loads", &domain_loads_ctr);
4487         register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4488         register_counter ("Event: Domain names", &domain_names_ctr);
4489         register_counter ("Event: Context loads", &context_loads_ctr);
4490         register_counter ("Event: Context unloads", &context_unloads_ctr);
4491         register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4492         register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4493         register_counter ("Event: Sample hits", &sample_hits_ctr);
4494         register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4495         register_counter ("Event: Counter samples", &counter_samples_ctr);
4496         register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4497         register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4498         register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4499         register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4500         register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4501         register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4502
4503         counters_init (profiler);
4504
4505         /*
4506          * We must start the helper thread before the writer thread. This is
4507          * because the helper thread sets up the command port which is written to
4508          * the log header by the writer thread.
4509          */
4510         start_helper_thread (profiler);
4511         start_writer_thread (profiler);
4512         start_dumper_thread (profiler);
4513 }
4514
4515 static void
4516 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4517 {
4518         char *nf;
4519         int force_delete = 0;
4520
4521         log_profiler = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4522         log_profiler->args = pstrdup (args);
4523         log_profiler->command_port = command_port;
4524
4525         if (filename && *filename == '-') {
4526                 force_delete = 1;
4527                 filename++;
4528                 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4529         }
4530
4531         //If filename begin with +, append the pid at the end
4532         if (filename && *filename == '+')
4533                 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4534
4535
4536         if (!filename) {
4537                 if (do_report)
4538                         filename = "|mprof-report -";
4539                 else
4540                         filename = "output.mlpd";
4541                 nf = (char*)filename;
4542         } else {
4543                 nf = new_filename (filename);
4544                 if (do_report) {
4545                         int s = strlen (nf) + 32;
4546                         char *p = (char *) g_malloc (s);
4547                         snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4548                         g_free (nf);
4549                         nf = p;
4550                 }
4551         }
4552         if (*nf == '|') {
4553                 log_profiler->file = popen (nf + 1, "w");
4554                 log_profiler->pipe_output = 1;
4555         } else if (*nf == '#') {
4556                 int fd = strtol (nf + 1, NULL, 10);
4557                 log_profiler->file = fdopen (fd, "a");
4558         } else {
4559                 if (force_delete)
4560                         unlink (nf);
4561                 log_profiler->file = fopen (nf, "wb");
4562         }
4563         if (!log_profiler->file) {
4564                 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4565                 exit (1);
4566         }
4567
4568 #if defined (HAVE_SYS_ZLIB)
4569         if (use_zip)
4570                 log_profiler->gzfile = gzdopen (fileno (log_profiler->file), "wb");
4571 #endif
4572
4573         /*
4574          * If you hit this assert while increasing MAX_FRAMES, you need to increase
4575          * SAMPLE_BLOCK_SIZE as well.
4576          */
4577         g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4578
4579         // FIXME: We should free this stuff too.
4580         mono_lock_free_allocator_init_size_class (&log_profiler->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4581         mono_lock_free_allocator_init_allocator (&log_profiler->sample_allocator, &log_profiler->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4582
4583         mono_lock_free_queue_init (&log_profiler->sample_reuse_queue);
4584
4585         g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4586
4587         // FIXME: We should free this stuff too.
4588         mono_lock_free_allocator_init_size_class (&log_profiler->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4589         mono_lock_free_allocator_init_allocator (&log_profiler->writer_entry_allocator, &log_profiler->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4590
4591         mono_lock_free_queue_init (&log_profiler->writer_queue);
4592         mono_os_sem_init (&log_profiler->writer_queue_sem, 0);
4593
4594         mono_lock_free_queue_init (&log_profiler->dumper_queue);
4595         mono_os_sem_init (&log_profiler->dumper_queue_sem, 0);
4596
4597         mono_os_mutex_init (&log_profiler->method_table_mutex);
4598         log_profiler->method_table = mono_conc_hashtable_new (NULL, NULL);
4599
4600         if (do_coverage)
4601                 coverage_init (log_profiler);
4602         log_profiler->coverage_filters = filters;
4603
4604         log_profiler->startup_time = current_time ();
4605 }
4606
4607 /*
4608  * declaration to silence the compiler: this is the entry point that
4609  * mono will load from the shared library and call.
4610  */
4611 extern void
4612 mono_profiler_startup (const char *desc);
4613
4614 extern void
4615 mono_profiler_startup_log (const char *desc);
4616
4617 /*
4618  * this is the entry point that will be used when the profiler
4619  * is embedded inside the main executable.
4620  */
4621 void
4622 mono_profiler_startup_log (const char *desc)
4623 {
4624         mono_profiler_startup (desc);
4625 }
4626
4627 void
4628 mono_profiler_startup (const char *desc)
4629 {
4630         GPtrArray *filters = NULL;
4631
4632         proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4633
4634         //XXX maybe later cleanup to use config directly
4635         nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4636         no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4637         do_report = config.do_report;
4638         do_debug = config.do_debug;
4639         do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4640         hs_mode_ondemand = config.hs_mode_ondemand;
4641         hs_mode_ms = config.hs_mode_ms;
4642         hs_mode_gc = config.hs_mode_gc;
4643         do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4644         use_zip = config.use_zip;
4645         command_port = config.command_port;
4646         num_frames = config.num_frames;
4647         notraces = config.notraces;
4648         max_allocated_sample_hits = config.max_allocated_sample_hits;
4649         max_call_depth = config.max_call_depth;
4650         do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4651         debug_coverage = config.debug_coverage;
4652         only_coverage = config.only_coverage;
4653
4654         if (config.cov_filter_files) {
4655                 filters = g_ptr_array_new ();
4656                 int i;
4657                 for (i = 0; i < config.cov_filter_files->len; ++i) {
4658                         const char *name = config.cov_filter_files->pdata [i];
4659                         parse_cov_filter_file (filters, name);
4660                 }
4661         }
4662
4663         init_time ();
4664
4665         PROF_TLS_INIT ();
4666
4667         create_profiler (desc, config.output_filename, filters);
4668
4669         mono_lls_init (&profiler_thread_list, NULL);
4670
4671         //This two events are required for the profiler to work
4672         int events = MONO_PROFILE_THREADS | MONO_PROFILE_GC;
4673
4674         //Required callbacks
4675         mono_profiler_install (log_profiler, log_shutdown);
4676         mono_profiler_install_runtime_initialized (runtime_initialized);
4677
4678         mono_profiler_install_gc (gc_event, gc_resize);
4679         mono_profiler_install_thread (thread_start, thread_end);
4680
4681         //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4682         mono_profiler_install_thread_name (thread_name);
4683
4684
4685         if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4686                 events |= MONO_PROFILE_APPDOMAIN_EVENTS;
4687                 mono_profiler_install_appdomain (NULL, domain_loaded, domain_unloaded, NULL);
4688                 mono_profiler_install_appdomain_name (domain_name);
4689         }
4690
4691         if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4692                 events |= MONO_PROFILE_ASSEMBLY_EVENTS;
4693                 mono_profiler_install_assembly (NULL, assembly_loaded, assembly_unloaded, NULL);
4694         }
4695
4696         if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4697                 events |= MONO_PROFILE_MODULE_EVENTS;
4698                 mono_profiler_install_module (NULL, image_loaded, image_unloaded, NULL);
4699         }
4700
4701         if (config.effective_mask & PROFLOG_CLASS_EVENTS) {
4702                 events |= MONO_PROFILE_CLASS_EVENTS;
4703                 mono_profiler_install_class (NULL, class_loaded, class_unloaded, NULL);
4704         }
4705
4706         if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4707                 events |= MONO_PROFILE_JIT_COMPILATION;
4708                 mono_profiler_install_jit_end (method_jitted);
4709                 mono_profiler_install_code_buffer_new (code_buffer_new);
4710         }
4711
4712         if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4713                 events |= MONO_PROFILE_EXCEPTIONS;
4714                 mono_profiler_install_exception (throw_exc, method_exc_leave, NULL);
4715                 mono_profiler_install_exception_clause (clause_exc);
4716         }
4717
4718         if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4719                 events |= MONO_PROFILE_ALLOCATIONS;
4720                 mono_profiler_install_allocation (gc_alloc);
4721         }
4722
4723         //PROFLOG_GC_EVENTS is mandatory
4724         //PROFLOG_THREAD_EVENTS is mandatory
4725
4726         if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4727                 events |= MONO_PROFILE_ENTER_LEAVE;
4728                 mono_profiler_install_enter_leave (method_enter, method_leave);
4729         }
4730
4731         if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS) {
4732                 events |= MONO_PROFILE_INS_COVERAGE;
4733                 mono_profiler_install_coverage_filter (coverage_filter);
4734         }
4735
4736         //XXX should we check for PROFLOG_SAMPLING_FEATURE instead??
4737         if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4738                 events |= MONO_PROFILE_STATISTICAL;
4739                 mono_profiler_set_statistical_mode (config.sampling_mode, config.sample_freq);
4740                 mono_profiler_install_statistical (mono_sample_hit);
4741         }
4742
4743         if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4744                 events |= MONO_PROFILE_MONITOR_EVENTS;
4745                 mono_profiler_install_monitor (monitor_event);
4746         }
4747
4748         if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS) {
4749                 events |= MONO_PROFILE_GC_MOVES;
4750                 mono_profiler_install_gc_moves (gc_moves);
4751         }
4752
4753         // TODO split those in two profiler events
4754         if (config.effective_mask & (PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_HANDLE_EVENTS)) {
4755                 events |= MONO_PROFILE_GC_ROOTS;
4756                 mono_profiler_install_gc_roots (
4757                         config.effective_mask & (PROFLOG_GC_HANDLE_EVENTS) ? gc_handle : NULL,
4758                         (config.effective_mask & PROFLOG_GC_ROOT_EVENTS) ? gc_roots : NULL);
4759         }
4760
4761         if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4762                 events |= MONO_PROFILE_CONTEXT_EVENTS;
4763                 mono_profiler_install_context (context_loaded, context_unloaded);
4764         }
4765
4766         if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4767                 events |= MONO_PROFILE_GC_FINALIZATION;
4768                 mono_profiler_install_gc_finalize (finalize_begin, finalize_object_begin, finalize_object_end, finalize_end);
4769         } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4770                 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4771                 events |= MONO_PROFILE_GC_FINALIZATION;
4772                 mono_profiler_install_gc_finalize (NULL, NULL, NULL, finalize_end);
4773         }
4774
4775         //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4776         //PROFLOG_GC_HANDLE_EVENTS is handled together with PROFLOG_GC_ROOT_EVENTS
4777
4778         mono_profiler_set_events ((MonoProfileFlags)events);
4779 }