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: flags: 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 the TYPE_ALLOC_BT flag is set, 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  *      [name: string] assembly name
 272  * if mtype == TYPE_DOMAIN && exinfo == 0
 273  *      [name: string] domain friendly name
 274  * if mtype == TYPE_CONTEXT
 275  *      [domain: sleb128] domain id as pointer
 276  * if mtype == TYPE_THREAD && exinfo == 0
 277  *      [name: string] thread name
 278  *
 279  * type method format:
 280  * type: TYPE_METHOD
 281  * exinfo: one of: TYPE_LEAVE, TYPE_ENTER, TYPE_EXC_LEAVE, TYPE_JIT
 282  * [method: sleb128] MonoMethod* as a pointer difference from the last such
 283  * pointer or the buffer method_base
 284  * if exinfo == TYPE_JIT
 285  *      [code address: sleb128] pointer to the native code as a diff from ptr_base
 286  *      [code size: uleb128] size of the generated code
 287  *      [name: string] full method name
 288  *
 289  * type exception format:
 290  * type: TYPE_EXCEPTION
 291  * exinfo: TYPE_THROW_BT flag or one of: TYPE_CLAUSE
 292  * if exinfo == TYPE_CLAUSE
 293  *      [clause type: byte] MonoExceptionEnum enum value
 294  *      [clause index: uleb128] index of the current clause
 295  *      [method: sleb128] MonoMethod* as a pointer difference from the last such
 296  *      pointer or the buffer method_base
 297  * else
 298  *      [object: sleb128] the exception object as a difference from obj_base
 299  *      if exinfo has TYPE_THROW_BT set, a backtrace follows.
 300  *
 301  * type runtime format:
 302  * type: TYPE_RUNTIME
 303  * exinfo: one of: TYPE_JITHELPER
 304  * if exinfo == TYPE_JITHELPER
 305  *      [type: byte] MonoProfilerCodeBufferType enum value
 306  *      [buffer address: sleb128] pointer to the native code as a diff from ptr_base
 307  *      [buffer size: uleb128] size of the generated code
 308  *      if type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE
 309  *              [name: string] buffer description name
 310  *
 311  * type monitor format:
 312  * type: TYPE_MONITOR
 313  * exinfo: TYPE_MONITOR_BT flag and one of: MONO_PROFILER_MONITOR_(CONTENTION|FAIL|DONE)
 314  * [object: sleb128] the lock object as a difference from obj_base
 315  * if exinfo.low3bits == MONO_PROFILER_MONITOR_CONTENTION
 316  *      If the TYPE_MONITOR_BT flag is set, a backtrace follows.
 317  *
 318  * type heap format
 319  * type: TYPE_HEAP
 320  * exinfo: one of TYPE_HEAP_START, TYPE_HEAP_END, TYPE_HEAP_OBJECT, TYPE_HEAP_ROOT
 321  * if exinfo == TYPE_HEAP_OBJECT
 322  *      [object: sleb128] the object as a difference from obj_base
 323  *      [class: sleb128] the object MonoClass* as a difference from ptr_base
 324  *      [size: uleb128] size of the object on the heap
 325  *      [num_refs: uleb128] number of object references
 326  *      each referenced objref is preceded by a uleb128 encoded offset: the
 327  *      first offset is from the object address and each next offset is relative
 328  *      to the previous one
 329  *      [objrefs: sleb128]+ object referenced as a difference from obj_base
 330  *      The same object can appear multiple times, but only the first time
 331  *      with size != 0: in the other cases this data will only be used to
 332  *      provide additional referenced objects.
 333  * if exinfo == TYPE_HEAP_ROOT
 334  *      [num_roots: uleb128] number of root references
 335  *      [num_gc: uleb128] number of major gcs
 336  *      [object: sleb128] the object as a difference from obj_base
 337  *      [root_type: byte] the root_type: MonoProfileGCRootType (profiler.h)
 338  *      [extra_info: uleb128] the extra_info value
 339  *      object, root_type and extra_info are repeated num_roots times
 340  *
 341  * type sample format
 342  * type: TYPE_SAMPLE
 343  * exinfo: one of TYPE_SAMPLE_HIT, TYPE_SAMPLE_USYM, TYPE_SAMPLE_UBIN, TYPE_SAMPLE_COUNTERS_DESC, TYPE_SAMPLE_COUNTERS
 344  * if exinfo == TYPE_SAMPLE_HIT
 345  *      [thread: sleb128] thread id as difference from ptr_base
 346  *      [count: uleb128] number of following instruction addresses
 347  *      [ip: sleb128]* instruction pointer as difference from ptr_base
 348  *      [mbt_count: uleb128] number of managed backtrace frames
 349  *      [method: sleb128]* MonoMethod* as a pointer difference from the last such
 350  *      pointer or the buffer method_base (the first such method can be also indentified by ip, but this is not neccessarily true)
 351  * if exinfo == TYPE_SAMPLE_USYM
 352  *      [address: sleb128] symbol address as a difference from ptr_base
 353  *      [size: uleb128] symbol size (may be 0 if unknown)
 354  *      [name: string] symbol name
 355  * if exinfo == TYPE_SAMPLE_UBIN
 356  *      [address: sleb128] address where binary has been loaded
 357  *      [offset: uleb128] file offset of mapping (the same file can be mapped multiple times)
 358  *      [size: uleb128] memory size
 359  *      [name: string] binary name
 360  * if exinfo == TYPE_SAMPLE_COUNTERS_DESC
 361  *      [len: uleb128] number of counters
 362  *      for i = 0 to len
 363  *              [section: uleb128] section of counter
 364  *              if section == MONO_COUNTER_PERFCOUNTERS:
 365  *                      [section_name: string] section name of counter
 366  *              [name: string] name of counter
 367  *              [type: byte] type of counter
 368  *              [unit: byte] unit of counter
 369  *              [variance: byte] variance of counter
 370  *              [index: uleb128] unique index of counter
 371  * if exinfo == TYPE_SAMPLE_COUNTERS
 372  *      while true:
 373  *              [index: uleb128] unique index of counter
 374  *              if index == 0:
 375  *                      break
 376  *              [type: byte] type of counter value
 377  *              if type == string:
 378  *                      if value == null:
 379  *                              [0: uleb128] 0 -> value is null
 380  *                      else:
 381  *                              [1: uleb128] 1 -> value is not null
 382  *                              [value: string] counter value
 383  *              else:
 384  *                      [value: uleb128/sleb128/double] counter value, can be sleb128, uleb128 or double (determined by using type)
 385  *
 386  * type coverage format
 387  * type: TYPE_COVERAGE
 388  * exinfo: one of TYPE_COVERAGE_METHOD, TYPE_COVERAGE_STATEMENT, TYPE_COVERAGE_ASSEMBLY, TYPE_COVERAGE_CLASS
 389  * if exinfo == TYPE_COVERAGE_METHOD
 390  *  [assembly: string] name of assembly
 391  *  [class: string] name of the class
 392  *  [name: string] name of the method
 393  *  [signature: string] the signature of the method
 394  *  [filename: string] the file path of the file that contains this method
 395  *  [token: uleb128] the method token
 396  *  [method_id: uleb128] an ID for this data to associate with the buffers of TYPE_COVERAGE_STATEMENTS
 397  *  [len: uleb128] the number of TYPE_COVERAGE_BUFFERS associated with this method
 398  * if exinfo == TYPE_COVERAGE_STATEMENTS
 399  *  [method_id: uleb128] an the TYPE_COVERAGE_METHOD buffer to associate this with
 400  *  [offset: uleb128] the il offset relative to the previous offset
 401  *  [counter: uleb128] the counter for this instruction
 402  *  [line: uleb128] the line of filename containing this instruction
 403  *  [column: uleb128] the column containing this instruction
 404  * if exinfo == TYPE_COVERAGE_ASSEMBLY
 405  *  [name: string] assembly name
 406  *  [guid: string] assembly GUID
 407  *  [filename: string] assembly filename
 408  *  [number_of_methods: uleb128] the number of methods in this assembly
 409  *  [fully_covered: uleb128] the number of fully covered methods
 410  *  [partially_covered: uleb128] the number of partially covered methods
 411  *    currently partially_covered will always be 0, and fully_covered is the
 412  *    number of methods that are fully and partially covered.
 413  * if exinfo == TYPE_COVERAGE_CLASS
 414  *  [name: string] assembly name
 415  *  [class: string] class name
 416  *  [number_of_methods: uleb128] the number of methods in this class
 417  *  [fully_covered: uleb128] the number of fully covered methods
 418  *  [partially_covered: uleb128] the number of partially covered methods
 419  *    currently partially_covered will always be 0, and fully_covered is the
 420  *    number of methods that are fully and partially covered.
 421  *
 422  * type meta format:
 423  * type: TYPE_META
 424  * exinfo: one of: TYPE_SYNC_POINT
 425  * if exinfo == TYPE_SYNC_POINT
 426  *      [type: byte] MonoProfilerSyncPointType enum value
 427  */
 428
 429 // Pending data to be written to the log, for a single thread.
 430 // Threads periodically flush their own LogBuffers by calling safe_send
 431 typedef struct _LogBuffer LogBuffer;
 432 struct _LogBuffer {
 433         // Next (older) LogBuffer in processing queue
 434         LogBuffer *next;
 435
 436         uint64_t time_base;
 437         uint64_t last_time;
 438         uintptr_t ptr_base;
 439         uintptr_t method_base;
 440         uintptr_t last_method;
 441         uintptr_t obj_base;
 442         uintptr_t thread_id;
 443
 444         // Bytes allocated for this LogBuffer
 445         int size;
 446
 447         // Start of currently unused space in buffer
 448         unsigned char* cursor;
 449
 450         // Pointer to start-of-structure-plus-size (for convenience)
 451         unsigned char* buf_end;
 452
 453         // Start of data in buffer. Contents follow "buffer format" described above.
 454         unsigned char buf [1];
 455 };
 456
 457 typedef struct {
 458         MonoLinkedListSetNode node;
 459
 460         // Convenience pointer to the profiler structure.
 461         MonoProfiler *profiler;
 462
 463         // Was this thread added to the LLS?
 464         gboolean attached;
 465
 466         // The current log buffer for this thread.
 467         LogBuffer *buffer;
 468
 469         // Methods referenced by events in `buffer`, see `MethodInfo`.
 470         GPtrArray *methods;
 471
 472         // Current call depth for enter/leave events.
 473         int call_depth;
 474
 475         // Indicates whether this thread is currently writing to its `buffer`.
 476         gboolean busy;
 477
 478         // Has this thread written a thread end event to `buffer`?
 479         gboolean ended;
 480 } MonoProfilerThread;
 481
 482 static uintptr_t
 483 thread_id (void)
 484 {
 485         return (uintptr_t) mono_native_thread_id_get ();
 486 }
 487
 488 static uintptr_t
 489 process_id (void)
 490 {
 491 #ifdef HOST_WIN32
 492         return (uintptr_t) GetCurrentProcessId ();
 493 #else
 494         return (uintptr_t) getpid ();
 495 #endif
 496 }
 497
 498 #ifdef __APPLE__
 499 static mach_timebase_info_data_t timebase_info;
 500 #elif defined (HOST_WIN32)
 501 static LARGE_INTEGER pcounter_freq;
 502 #endif
 503
 504 #define TICKS_PER_SEC 1000000000LL
 505
 506 static uint64_t
 507 current_time (void)
 508 {
 509 #ifdef __APPLE__
 510         uint64_t time = mach_absolute_time ();
 511
 512         time *= timebase_info.numer;
 513         time /= timebase_info.denom;
 514
 515         return time;
 516 #elif defined (HOST_WIN32)
 517         LARGE_INTEGER value;
 518
 519         QueryPerformanceCounter (&value);
 520
 521         return value.QuadPart * TICKS_PER_SEC / pcounter_freq.QuadPart;
 522 #elif defined (CLOCK_MONOTONIC)
 523         struct timespec tspec;
 524
 525         clock_gettime (CLOCK_MONOTONIC, &tspec);
 526
 527         return ((uint64_t) tspec.tv_sec * TICKS_PER_SEC + tspec.tv_nsec);
 528 #else
 529         struct timeval tv;
 530
 531         gettimeofday (&tv, NULL);
 532
 533         return ((uint64_t) tv.tv_sec * TICKS_PER_SEC + tv.tv_usec * 1000);
 534 #endif
 535 }
 536
 537 static int timer_overhead;
 538
 539 static void
 540 init_time (void)
 541 {
 542 #ifdef __APPLE__
 543         mach_timebase_info (&timebase_info);
 544 #elif defined (HOST_WIN32)
 545         QueryPerformanceFrequency (&pcounter_freq);
 546 #endif
 547
 548         uint64_t time_start = current_time ();
 549
 550         for (int i = 0; i < 256; ++i)
 551                 current_time ();
 552
 553         uint64_t time_end = current_time ();
 554
 555         timer_overhead = (time_end - time_start) / 256;
 556 }
 557
 558 /*
 559  * These macros should be used when writing an event to a log buffer. They take
 560  * care of a bunch of stuff that can be repetitive and error-prone, such as
 561  * acquiring/releasing the buffer lock, incrementing the event counter,
 562  * expanding the log buffer, processing requests, etc. They also create a scope
 563  * so that it's harder to leak the LogBuffer pointer, which can be problematic
 564  * as the pointer is unstable when the buffer lock isn't acquired.
 565  */
 566
 567 #define ENTER_LOG(COUNTER, BUFFER, SIZE) \
 568         do { \
 569                 MonoProfilerThread *thread__ = PROF_TLS_GET (); \
 570                 if (thread__->attached) \
 571                         buffer_lock (); \
 572                 g_assert (!thread__->busy && "Why are we trying to write a new event while already writing one?"); \
 573                 thread__->busy = TRUE; \
 574                 InterlockedIncrement ((COUNTER)); \
 575                 LogBuffer *BUFFER = ensure_logbuf_unsafe (thread__, (SIZE))
 576
 577 #define EXIT_LOG_EXPLICIT(SEND) \
 578                 thread__->busy = FALSE; \
 579                 if ((SEND)) \
 580                         send_log_unsafe (TRUE); \
 581                 if (thread__->attached) \
 582                         buffer_unlock (); \
 583         } while (0)
 584
 585 // Pass these to EXIT_LOG_EXPLICIT () for easier reading.
 586 #define DO_SEND TRUE
 587 #define NO_SEND FALSE
 588
 589 #define EXIT_LOG EXIT_LOG_EXPLICIT (DO_SEND)
 590
 591 static volatile gint32 buffer_rwlock_count;
 592 static volatile gpointer buffer_rwlock_exclusive;
 593
 594 // Can be used recursively.
 595 static void
 596 buffer_lock (void)
 597 {
 598         /*
 599          * If the thread holding the exclusive lock tries to modify the
 600          * reader count, just make it a no-op. This way, we also avoid
 601          * invoking the GC safe point macros below, which could break if
 602          * done from a thread that is currently the initiator of STW.
 603          *
 604          * In other words, we rely on the fact that the GC thread takes
 605          * the exclusive lock in the gc_event () callback when the world
 606          * is about to stop.
 607          */
 608         if (InterlockedReadPointer (&buffer_rwlock_exclusive) != (gpointer) thread_id ()) {
 609                 MONO_ENTER_GC_SAFE;
 610
 611                 while (InterlockedReadPointer (&buffer_rwlock_exclusive))
 612                         mono_thread_info_yield ();
 613
 614                 InterlockedIncrement (&buffer_rwlock_count);
 615
 616                 MONO_EXIT_GC_SAFE;
 617         }
 618
 619         mono_memory_barrier ();
 620 }
 621
 622 static void
 623 buffer_unlock (void)
 624 {
 625         mono_memory_barrier ();
 626
 627         // See the comment in buffer_lock ().
 628         if (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id ())
 629                 return;
 630
 631         g_assert (InterlockedRead (&buffer_rwlock_count) && "Why are we trying to decrement a zero reader count?");
 632
 633         InterlockedDecrement (&buffer_rwlock_count);
 634 }
 635
 636 // Cannot be used recursively.
 637 static void
 638 buffer_lock_excl (void)
 639 {
 640         gpointer tid = (gpointer) thread_id ();
 641
 642         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) != tid && "Why are we taking the exclusive lock twice?");
 643
 644         MONO_ENTER_GC_SAFE;
 645
 646         while (InterlockedCompareExchangePointer (&buffer_rwlock_exclusive, tid, 0))
 647                 mono_thread_info_yield ();
 648
 649         while (InterlockedRead (&buffer_rwlock_count))
 650                 mono_thread_info_yield ();
 651
 652         MONO_EXIT_GC_SAFE;
 653
 654         mono_memory_barrier ();
 655 }
 656
 657 static void
 658 buffer_unlock_excl (void)
 659 {
 660         mono_memory_barrier ();
 661
 662         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why is the exclusive lock not held?");
 663         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why does another thread hold the exclusive lock?");
 664         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why are there readers when the exclusive lock is held?");
 665
 666         InterlockedWritePointer (&buffer_rwlock_exclusive, NULL);
 667 }
 668
 669 typedef struct _BinaryObject BinaryObject;
 670 struct _BinaryObject {
 671         BinaryObject *next;
 672         void *addr;
 673         char *name;
 674 };
 675
 676 struct _MonoProfiler {
 677         FILE* file;
 678 #if defined (HAVE_SYS_ZLIB)
 679         gzFile gzfile;
 680 #endif
 681         char *args;
 682         uint64_t startup_time;
 683         int pipe_output;
 684         int command_port;
 685         int server_socket;
 686         int pipes [2];
 687         MonoNativeThreadId helper_thread;
 688         MonoNativeThreadId writer_thread;
 689         MonoNativeThreadId dumper_thread;
 690         volatile gint32 run_writer_thread;
 691         MonoLockFreeAllocSizeClass writer_entry_size_class;
 692         MonoLockFreeAllocator writer_entry_allocator;
 693         MonoLockFreeQueue writer_queue;
 694         MonoSemType writer_queue_sem;
 695         MonoConcurrentHashTable *method_table;
 696         mono_mutex_t method_table_mutex;
 697         volatile gint32 run_dumper_thread;
 698         MonoLockFreeQueue dumper_queue;
 699         MonoSemType dumper_queue_sem;
 700         MonoLockFreeAllocSizeClass sample_size_class;
 701         MonoLockFreeAllocator sample_allocator;
 702         MonoLockFreeQueue sample_reuse_queue;
 703         BinaryObject *binary_objects;
 704         GPtrArray *coverage_filters;
 705 };
 706
 707 typedef struct {
 708         MonoLockFreeQueueNode node;
 709         GPtrArray *methods;
 710         LogBuffer *buffer;
 711 } WriterQueueEntry;
 712
 713 #define WRITER_ENTRY_BLOCK_SIZE (mono_pagesize ())
 714
 715 typedef struct {
 716         MonoMethod *method;
 717         MonoJitInfo *ji;
 718         uint64_t time;
 719 } MethodInfo;
 720
 721 #ifdef HOST_WIN32
 722
 723 #define PROF_TLS_SET(VAL) (TlsSetValue (profiler_tls, (VAL)))
 724 #define PROF_TLS_GET() ((MonoProfilerThread *) TlsGetValue (profiler_tls))
 725 #define PROF_TLS_INIT() (profiler_tls = TlsAlloc ())
 726 #define PROF_TLS_FREE() (TlsFree (profiler_tls))
 727
 728 static DWORD profiler_tls;
 729
 730 #elif HAVE_KW_THREAD
 731
 732 #define PROF_TLS_SET(VAL) (profiler_tls = (VAL))
 733 #define PROF_TLS_GET() (profiler_tls)
 734 #define PROF_TLS_INIT()
 735 #define PROF_TLS_FREE()
 736
 737 static __thread MonoProfilerThread *profiler_tls;
 738
 739 #else
 740
 741 #define PROF_TLS_SET(VAL) (pthread_setspecific (profiler_tls, (VAL)))
 742 #define PROF_TLS_GET() ((MonoProfilerThread *) pthread_getspecific (profiler_tls))
 743 #define PROF_TLS_INIT() (pthread_key_create (&profiler_tls, NULL))
 744 #define PROF_TLS_FREE() (pthread_key_delete (profiler_tls))
 745
 746 static pthread_key_t profiler_tls;
 747
 748 #endif
 749
 750 static char*
 751 pstrdup (const char *s)
 752 {
 753         int len = strlen (s) + 1;
 754         char *p = (char *) g_malloc (len);
 755         memcpy (p, s, len);
 756         return p;
 757 }
 758
 759 static void *
 760 alloc_buffer (int size)
 761 {
 762         return mono_valloc (NULL, size, MONO_MMAP_READ | MONO_MMAP_WRITE | MONO_MMAP_ANON | MONO_MMAP_PRIVATE, MONO_MEM_ACCOUNT_PROFILER);
 763 }
 764
 765 static void
 766 free_buffer (void *buf, int size)
 767 {
 768         mono_vfree (buf, size, MONO_MEM_ACCOUNT_PROFILER);
 769 }
 770
 771 static LogBuffer*
 772 create_buffer (uintptr_t tid)
 773 {
 774         LogBuffer* buf = (LogBuffer *) alloc_buffer (BUFFER_SIZE);
 775
 776         InterlockedIncrement (&buffer_allocations_ctr);
 777
 778         buf->size = BUFFER_SIZE;
 779         buf->time_base = current_time ();
 780         buf->last_time = buf->time_base;
 781         buf->buf_end = (unsigned char *) buf + buf->size;
 782         buf->cursor = buf->buf;
 783         buf->thread_id = tid;
 784
 785         return buf;
 786 }
 787
 788 /*
 789  * Must be called with the reader lock held if thread is the current thread, or
 790  * the exclusive lock if thread is a different thread. However, if thread is
 791  * the current thread, and init_thread () was called with add_to_lls = FALSE,
 792  * then no locking is necessary.
 793  */
 794 static void
 795 init_buffer_state (MonoProfilerThread *thread)
 796 {
 797         thread->buffer = create_buffer (thread->node.key);
 798         thread->methods = NULL;
 799 }
 800
 801 static void
 802 clear_hazard_pointers (MonoThreadHazardPointers *hp)
 803 {
 804         mono_hazard_pointer_clear (hp, 0);
 805         mono_hazard_pointer_clear (hp, 1);
 806         mono_hazard_pointer_clear (hp, 2);
 807 }
 808
 809 static MonoProfilerThread *
 810 init_thread (MonoProfiler *prof, gboolean add_to_lls)
 811 {
 812         MonoProfilerThread *thread = PROF_TLS_GET ();
 813
 814         /*
 815          * Sometimes we may try to initialize a thread twice. One example is the
 816          * main thread: We initialize it when setting up the profiler, but we will
 817          * also get a thread_start () callback for it. Another example is when
 818          * attaching new threads to the runtime: We may get a gc_alloc () callback
 819          * for that thread's thread object (where we initialize it), soon followed
 820          * by a thread_start () callback.
 821          *
 822          * These cases are harmless anyhow. Just return if we've already done the
 823          * initialization work.
 824          */
 825         if (thread)
 826                 return thread;
 827
 828         thread = g_malloc (sizeof (MonoProfilerThread));
 829         thread->node.key = thread_id ();
 830         thread->profiler = prof;
 831         thread->attached = add_to_lls;
 832         thread->call_depth = 0;
 833         thread->busy = 0;
 834         thread->ended = FALSE;
 835
 836         init_buffer_state (thread);
 837
 838         /*
 839          * Some internal profiler threads don't need to be cleaned up
 840          * by the main thread on shutdown.
 841          */
 842         if (add_to_lls) {
 843                 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
 844                 g_assert (mono_lls_insert (&profiler_thread_list, hp, &thread->node) && "Why can't we insert the thread in the LLS?");
 845                 clear_hazard_pointers (hp);
 846         }
 847
 848         PROF_TLS_SET (thread);
 849
 850         return thread;
 851 }
 852
 853 // Only valid if init_thread () was called with add_to_lls = FALSE.
 854 static void
 855 deinit_thread (MonoProfilerThread *thread)
 856 {
 857         g_assert (!thread->attached && "Why are we manually freeing an attached thread?");
 858
 859         g_free (thread);
 860         PROF_TLS_SET (NULL);
 861 }
 862
 863 // Only valid if init_thread () was called with add_to_lls = FALSE.
 864 static LogBuffer *
 865 ensure_logbuf_unsafe (MonoProfilerThread *thread, int bytes)
 866 {
 867         LogBuffer *old = thread->buffer;
 868
 869         if (old && old->cursor + bytes + 100 < old->buf_end)
 870                 return old;
 871
 872         LogBuffer *new_ = create_buffer (thread->node.key);
 873         new_->next = old;
 874         thread->buffer = new_;
 875
 876         return new_;
 877 }
 878
 879 static void
 880 encode_uleb128 (uint64_t value, uint8_t *buf, uint8_t **endbuf)
 881 {
 882         uint8_t *p = buf;
 883
 884         do {
 885                 uint8_t b = value & 0x7f;
 886                 value >>= 7;
 887
 888                 if (value != 0) /* more bytes to come */
 889                         b |= 0x80;
 890
 891                 *p ++ = b;
 892         } while (value);
 893
 894         *endbuf = p;
 895 }
 896
 897 static void
 898 encode_sleb128 (intptr_t value, uint8_t *buf, uint8_t **endbuf)
 899 {
 900         int more = 1;
 901         int negative = (value < 0);
 902         unsigned int size = sizeof (intptr_t) * 8;
 903         uint8_t byte;
 904         uint8_t *p = buf;
 905
 906         while (more) {
 907                 byte = value & 0x7f;
 908                 value >>= 7;
 909
 910                 /* the following is unnecessary if the
 911                  * implementation of >>= uses an arithmetic rather
 912                  * than logical shift for a signed left operand
 913                  */
 914                 if (negative)
 915                         /* sign extend */
 916                         value |= - ((intptr_t) 1 <<(size - 7));
 917
 918                 /* sign bit of byte is second high order bit (0x40) */
 919                 if ((value == 0 && !(byte & 0x40)) ||
 920                     (value == -1 && (byte & 0x40)))
 921                         more = 0;
 922                 else
 923                         byte |= 0x80;
 924
 925                 *p ++= byte;
 926         }
 927
 928         *endbuf = p;
 929 }
 930
 931 static void
 932 emit_byte (LogBuffer *logbuffer, int value)
 933 {
 934         logbuffer->cursor [0] = value;
 935         logbuffer->cursor++;
 936
 937         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 938 }
 939
 940 static void
 941 emit_value (LogBuffer *logbuffer, int value)
 942 {
 943         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 944
 945         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 946 }
 947
 948 static void
 949 emit_time (LogBuffer *logbuffer, uint64_t value)
 950 {
 951         uint64_t tdiff = value - logbuffer->last_time;
 952         encode_uleb128 (tdiff, logbuffer->cursor, &logbuffer->cursor);
 953         logbuffer->last_time = value;
 954
 955         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 956 }
 957
 958 static void
 959 emit_event_time (LogBuffer *logbuffer, int event, uint64_t time)
 960 {
 961         emit_byte (logbuffer, event);
 962         emit_time (logbuffer, time);
 963 }
 964
 965 static void
 966 emit_event (LogBuffer *logbuffer, int event)
 967 {
 968         emit_event_time (logbuffer, event, current_time ());
 969 }
 970
 971 static void
 972 emit_svalue (LogBuffer *logbuffer, int64_t value)
 973 {
 974         encode_sleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 975
 976         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 977 }
 978
 979 static void
 980 emit_uvalue (LogBuffer *logbuffer, uint64_t value)
 981 {
 982         encode_uleb128 (value, logbuffer->cursor, &logbuffer->cursor);
 983
 984         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 985 }
 986
 987 static void
 988 emit_ptr (LogBuffer *logbuffer, void *ptr)
 989 {
 990         if (!logbuffer->ptr_base)
 991                 logbuffer->ptr_base = (uintptr_t) ptr;
 992
 993         emit_svalue (logbuffer, (intptr_t) ptr - logbuffer->ptr_base);
 994
 995         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
 996 }
 997
 998 static void
 999 emit_method_inner (LogBuffer *logbuffer, void *method)
1000 {
1001         if (!logbuffer->method_base) {
1002                 logbuffer->method_base = (intptr_t) method;
1003                 logbuffer->last_method = (intptr_t) method;
1004         }
1005
1006         encode_sleb128 ((intptr_t) ((char *) method - (char *) logbuffer->last_method), logbuffer->cursor, &logbuffer->cursor);
1007         logbuffer->last_method = (intptr_t) method;
1008
1009         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1010 }
1011
1012 static void
1013 register_method_local (MonoMethod *method, MonoJitInfo *ji)
1014 {
1015         MonoProfilerThread *thread = PROF_TLS_GET ();
1016
1017         if (!mono_conc_hashtable_lookup (thread->profiler->method_table, method)) {
1018                 MethodInfo *info = (MethodInfo *) g_malloc (sizeof (MethodInfo));
1019
1020                 info->method = method;
1021                 info->ji = ji;
1022                 info->time = current_time ();
1023
1024                 GPtrArray *arr = thread->methods ? thread->methods : (thread->methods = g_ptr_array_new ());
1025                 g_ptr_array_add (arr, info);
1026         }
1027 }
1028
1029 static void
1030 emit_method (LogBuffer *logbuffer, MonoMethod *method)
1031 {
1032         register_method_local (method, NULL);
1033         emit_method_inner (logbuffer, method);
1034 }
1035
1036 static void
1037 emit_obj (LogBuffer *logbuffer, void *ptr)
1038 {
1039         if (!logbuffer->obj_base)
1040                 logbuffer->obj_base = (uintptr_t) ptr >> 3;
1041
1042         emit_svalue (logbuffer, ((uintptr_t) ptr >> 3) - logbuffer->obj_base);
1043
1044         g_assert (logbuffer->cursor <= logbuffer->buf_end && "Why are we writing past the buffer end?");
1045 }
1046
1047 static void
1048 emit_string (LogBuffer *logbuffer, const char *str, size_t size)
1049 {
1050         size_t i = 0;
1051         if (str) {
1052                 for (; i < size; i++) {
1053                         if (str[i] == '\0')
1054                                 break;
1055                         emit_byte (logbuffer, str [i]);
1056                 }
1057         }
1058         emit_byte (logbuffer, '\0');
1059 }
1060
1061 static void
1062 emit_double (LogBuffer *logbuffer, double value)
1063 {
1064         int i;
1065         unsigned char buffer[8];
1066         memcpy (buffer, &value, 8);
1067 #if G_BYTE_ORDER == G_BIG_ENDIAN
1068         for (i = 7; i >= 0; i--)
1069 #else
1070         for (i = 0; i < 8; i++)
1071 #endif
1072                 emit_byte (logbuffer, buffer[i]);
1073 }
1074
1075 static char*
1076 write_int16 (char *buf, int32_t value)
1077 {
1078         int i;
1079         for (i = 0; i < 2; ++i) {
1080                 buf [i] = value;
1081                 value >>= 8;
1082         }
1083         return buf + 2;
1084 }
1085
1086 static char*
1087 write_int32 (char *buf, int32_t value)
1088 {
1089         int i;
1090         for (i = 0; i < 4; ++i) {
1091                 buf [i] = value;
1092                 value >>= 8;
1093         }
1094         return buf + 4;
1095 }
1096
1097 static char*
1098 write_int64 (char *buf, int64_t value)
1099 {
1100         int i;
1101         for (i = 0; i < 8; ++i) {
1102                 buf [i] = value;
1103                 value >>= 8;
1104         }
1105         return buf + 8;
1106 }
1107
1108 static char *
1109 write_header_string (char *p, const char *str)
1110 {
1111         size_t len = strlen (str) + 1;
1112
1113         p = write_int32 (p, len);
1114         strcpy (p, str);
1115
1116         return p + len;
1117 }
1118
1119 static void
1120 dump_header (MonoProfiler *profiler)
1121 {
1122         const char *args = profiler->args;
1123         const char *arch = mono_config_get_cpu ();
1124         const char *os = mono_config_get_os ();
1125
1126         char *hbuf = g_malloc (
1127                 sizeof (gint32) /* header id */ +
1128                 sizeof (gint8) /* major version */ +
1129                 sizeof (gint8) /* minor version */ +
1130                 sizeof (gint8) /* data version */ +
1131                 sizeof (gint8) /* word size */ +
1132                 sizeof (gint64) /* startup time */ +
1133                 sizeof (gint32) /* timer overhead */ +
1134                 sizeof (gint32) /* flags */ +
1135                 sizeof (gint32) /* process id */ +
1136                 sizeof (gint16) /* command port */ +
1137                 sizeof (gint32) + strlen (args) + 1 /* arguments */ +
1138                 sizeof (gint32) + strlen (arch) + 1 /* architecture */ +
1139                 sizeof (gint32) + strlen (os) + 1 /* operating system */
1140         );
1141         char *p = hbuf;
1142
1143         p = write_int32 (p, LOG_HEADER_ID);
1144         *p++ = LOG_VERSION_MAJOR;
1145         *p++ = LOG_VERSION_MINOR;
1146         *p++ = LOG_DATA_VERSION;
1147         *p++ = sizeof (void *);
1148         p = write_int64 (p, ((uint64_t) time (NULL)) * 1000);
1149         p = write_int32 (p, timer_overhead);
1150         p = write_int32 (p, 0); /* flags */
1151         p = write_int32 (p, process_id ());
1152         p = write_int16 (p, profiler->command_port);
1153         p = write_header_string (p, args);
1154         p = write_header_string (p, arch);
1155         p = write_header_string (p, os);
1156
1157 #if defined (HAVE_SYS_ZLIB)
1158         if (profiler->gzfile) {
1159                 gzwrite (profiler->gzfile, hbuf, p - hbuf);
1160         } else
1161 #endif
1162         {
1163                 fwrite (hbuf, p - hbuf, 1, profiler->file);
1164                 fflush (profiler->file);
1165         }
1166
1167         g_free (hbuf);
1168 }
1169
1170 /*
1171  * Must be called with the reader lock held if thread is the current thread, or
1172  * the exclusive lock if thread is a different thread. However, if thread is
1173  * the current thread, and init_thread () was called with add_to_lls = FALSE,
1174  * then no locking is necessary.
1175  */
1176 static void
1177 send_buffer (MonoProfilerThread *thread)
1178 {
1179         WriterQueueEntry *entry = mono_lock_free_alloc (&thread->profiler->writer_entry_allocator);
1180         entry->methods = thread->methods;
1181         entry->buffer = thread->buffer;
1182
1183         mono_lock_free_queue_node_init (&entry->node, FALSE);
1184
1185         mono_lock_free_queue_enqueue (&thread->profiler->writer_queue, &entry->node);
1186         mono_os_sem_post (&thread->profiler->writer_queue_sem);
1187 }
1188
1189 static void
1190 free_thread (gpointer p)
1191 {
1192         MonoProfilerThread *thread = p;
1193
1194         if (!thread->ended) {
1195                 /*
1196                  * The thread is being cleaned up by the main thread during
1197                  * shutdown. This typically happens for internal runtime
1198                  * threads. We need to synthesize a thread end event.
1199                  */
1200
1201                 InterlockedIncrement (&thread_ends_ctr);
1202
1203                 if (ENABLED (PROFLOG_THREAD_EVENTS)) {
1204                         LogBuffer *buf = ensure_logbuf_unsafe (thread,
1205                                 EVENT_SIZE /* event */ +
1206                                 BYTE_SIZE /* type */ +
1207                                 LEB128_SIZE /* tid */
1208                         );
1209
1210                         emit_event (buf, TYPE_END_UNLOAD | TYPE_METADATA);
1211                         emit_byte (buf, TYPE_THREAD);
1212                         emit_ptr (buf, (void *) thread->node.key);
1213                 }
1214         }
1215
1216         send_buffer (thread);
1217
1218         g_free (thread);
1219 }
1220
1221 static void
1222 remove_thread (MonoProfilerThread *thread)
1223 {
1224         MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
1225
1226         if (mono_lls_remove (&profiler_thread_list, hp, &thread->node))
1227                 mono_thread_hazardous_try_free (thread, free_thread);
1228
1229         clear_hazard_pointers (hp);
1230 }
1231
1232 static void
1233 dump_buffer (MonoProfiler *profiler, LogBuffer *buf)
1234 {
1235         char hbuf [128];
1236         char *p = hbuf;
1237
1238         if (buf->next)
1239                 dump_buffer (profiler, buf->next);
1240
1241         if (buf->cursor - buf->buf) {
1242                 p = write_int32 (p, BUF_ID);
1243                 p = write_int32 (p, buf->cursor - buf->buf);
1244                 p = write_int64 (p, buf->time_base);
1245                 p = write_int64 (p, buf->ptr_base);
1246                 p = write_int64 (p, buf->obj_base);
1247                 p = write_int64 (p, buf->thread_id);
1248                 p = write_int64 (p, buf->method_base);
1249
1250 #if defined (HAVE_SYS_ZLIB)
1251                 if (profiler->gzfile) {
1252                         gzwrite (profiler->gzfile, hbuf, p - hbuf);
1253                         gzwrite (profiler->gzfile, buf->buf, buf->cursor - buf->buf);
1254                 } else
1255 #endif
1256                 {
1257                         fwrite (hbuf, p - hbuf, 1, profiler->file);
1258                         fwrite (buf->buf, buf->cursor - buf->buf, 1, profiler->file);
1259                         fflush (profiler->file);
1260                 }
1261         }
1262
1263         free_buffer (buf, buf->size);
1264 }
1265
1266 static void
1267 dump_buffer_threadless (MonoProfiler *profiler, LogBuffer *buf)
1268 {
1269         for (LogBuffer *iter = buf; iter; iter = iter->next)
1270                 iter->thread_id = 0;
1271
1272         dump_buffer (profiler, buf);
1273 }
1274
1275 // Only valid if init_thread () was called with add_to_lls = FALSE.
1276 static void
1277 send_log_unsafe (gboolean if_needed)
1278 {
1279         MonoProfilerThread *thread = PROF_TLS_GET ();
1280
1281         if (!if_needed || (if_needed && thread->buffer->next)) {
1282                 if (!thread->attached)
1283                         for (LogBuffer *iter = thread->buffer; iter; iter = iter->next)
1284                                 iter->thread_id = 0;
1285
1286                 send_buffer (thread);
1287                 init_buffer_state (thread);
1288         }
1289 }
1290
1291 // Assumes that the exclusive lock is held.
1292 static void
1293 sync_point_flush (void)
1294 {
1295         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1296
1297         MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
1298                 g_assert (thread->attached && "Why is a thread in the LLS not attached?");
1299
1300                 send_buffer (thread);
1301                 init_buffer_state (thread);
1302         } MONO_LLS_FOREACH_SAFE_END
1303 }
1304
1305 // Assumes that the exclusive lock is held.
1306 static void
1307 sync_point_mark (MonoProfilerSyncPointType type)
1308 {
1309         g_assert (InterlockedReadPointer (&buffer_rwlock_exclusive) == (gpointer) thread_id () && "Why don't we hold the exclusive lock?");
1310
1311         ENTER_LOG (&sync_points_ctr, logbuffer,
1312                 EVENT_SIZE /* event */ +
1313                 LEB128_SIZE /* type */
1314         );
1315
1316         emit_event (logbuffer, TYPE_META | TYPE_SYNC_POINT);
1317         emit_byte (logbuffer, type);
1318
1319         EXIT_LOG_EXPLICIT (NO_SEND);
1320
1321         send_log_unsafe (FALSE);
1322 }
1323
1324 // Assumes that the exclusive lock is held.
1325 static void
1326 sync_point (MonoProfilerSyncPointType type)
1327 {
1328         sync_point_flush ();
1329         sync_point_mark (type);
1330 }
1331
1332 static int
1333 gc_reference (MonoObject *obj, MonoClass *klass, uintptr_t size, uintptr_t num, MonoObject **refs, uintptr_t *offsets, void *data)
1334 {
1335         /* account for object alignment in the heap */
1336         size += 7;
1337         size &= ~7;
1338
1339         ENTER_LOG (&heap_objects_ctr, logbuffer,
1340                 EVENT_SIZE /* event */ +
1341                 LEB128_SIZE /* obj */ +
1342                 LEB128_SIZE /* klass */ +
1343                 LEB128_SIZE /* size */ +
1344                 LEB128_SIZE /* num */ +
1345                 num * (
1346                         LEB128_SIZE /* offset */ +
1347                         LEB128_SIZE /* ref */
1348                 )
1349         );
1350
1351         emit_event (logbuffer, TYPE_HEAP_OBJECT | TYPE_HEAP);
1352         emit_obj (logbuffer, obj);
1353         emit_ptr (logbuffer, klass);
1354         emit_value (logbuffer, size);
1355         emit_value (logbuffer, num);
1356
1357         uintptr_t last_offset = 0;
1358
1359         for (int i = 0; i < num; ++i) {
1360                 emit_value (logbuffer, offsets [i] - last_offset);
1361                 last_offset = offsets [i];
1362                 emit_obj (logbuffer, refs [i]);
1363         }
1364
1365         EXIT_LOG_EXPLICIT (DO_SEND);
1366
1367         return 0;
1368 }
1369
1370 static unsigned int hs_mode_ms = 0;
1371 static unsigned int hs_mode_gc = 0;
1372 static unsigned int hs_mode_ondemand = 0;
1373 static unsigned int gc_count = 0;
1374 static uint64_t last_hs_time = 0;
1375 static gboolean do_heap_walk = FALSE;
1376 static gboolean ignore_heap_events;
1377
1378 static void
1379 gc_roots (MonoProfiler *prof, int num, void **objects, int *root_types, uintptr_t *extra_info)
1380 {
1381         if (ignore_heap_events)
1382                 return;
1383
1384         ENTER_LOG (&heap_roots_ctr, logbuffer,
1385                 EVENT_SIZE /* event */ +
1386                 LEB128_SIZE /* num */ +
1387                 LEB128_SIZE /* collections */ +
1388                 num * (
1389                         LEB128_SIZE /* object */ +
1390                         LEB128_SIZE /* root type */ +
1391                         LEB128_SIZE /* extra info */
1392                 )
1393         );
1394
1395         emit_event (logbuffer, TYPE_HEAP_ROOT | TYPE_HEAP);
1396         emit_value (logbuffer, num);
1397         emit_value (logbuffer, mono_gc_collection_count (mono_gc_max_generation ()));
1398
1399         for (int i = 0; i < num; ++i) {
1400                 emit_obj (logbuffer, objects [i]);
1401                 emit_byte (logbuffer, root_types [i]);
1402                 emit_value (logbuffer, extra_info [i]);
1403         }
1404
1405         EXIT_LOG_EXPLICIT (DO_SEND);
1406 }
1407
1408
1409 static void
1410 trigger_on_demand_heapshot (void)
1411 {
1412         if (heapshot_requested)
1413                 mono_gc_collect (mono_gc_max_generation ());
1414 }
1415
1416 #define ALL_GC_EVENTS_MASK (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_EVENTS | PROFLOG_HEAPSHOT_FEATURE)
1417
1418 static void
1419 gc_event (MonoProfiler *profiler, MonoGCEvent ev, int generation)
1420 {
1421         if (ev == MONO_GC_EVENT_START) {
1422                 uint64_t now = current_time ();
1423
1424                 if (hs_mode_ms && (now - last_hs_time) / 1000 * 1000 >= hs_mode_ms)
1425                         do_heap_walk = TRUE;
1426                 else if (hs_mode_gc && !(gc_count % hs_mode_gc))
1427                         do_heap_walk = TRUE;
1428                 else if (hs_mode_ondemand)
1429                         do_heap_walk = heapshot_requested;
1430                 else if (!hs_mode_ms && !hs_mode_gc && generation == mono_gc_max_generation ())
1431                         do_heap_walk = TRUE;
1432
1433                 //If using heapshot, ignore events for collections we don't care
1434                 if (ENABLED (PROFLOG_HEAPSHOT_FEATURE)) {
1435                         // Ignore events generated during the collection itself (IE GC ROOTS)
1436                         ignore_heap_events = !do_heap_walk;
1437                 }
1438         }
1439
1440
1441         if (ENABLED (PROFLOG_GC_EVENTS)) {
1442                 ENTER_LOG (&gc_events_ctr, logbuffer,
1443                         EVENT_SIZE /* event */ +
1444                         BYTE_SIZE /* gc event */ +
1445                         BYTE_SIZE /* generation */
1446                 );
1447
1448                 emit_event (logbuffer, TYPE_GC_EVENT | TYPE_GC);
1449                 emit_byte (logbuffer, ev);
1450                 emit_byte (logbuffer, generation);
1451
1452                 EXIT_LOG_EXPLICIT (NO_SEND);
1453         }
1454
1455         switch (ev) {
1456         case MONO_GC_EVENT_START:
1457                 if (generation == mono_gc_max_generation ())
1458                         gc_count++;
1459
1460                 break;
1461         case MONO_GC_EVENT_PRE_STOP_WORLD_LOCKED:
1462                 /*
1463                  * Ensure that no thread can be in the middle of writing to
1464                  * a buffer when the world stops...
1465                  */
1466                 buffer_lock_excl ();
1467                 break;
1468         case MONO_GC_EVENT_POST_STOP_WORLD:
1469                 /*
1470                  * ... So that we now have a consistent view of all buffers.
1471                  * This allows us to flush them. We need to do this because
1472                  * they may contain object allocation events that need to be
1473                  * committed to the log file before any object move events
1474                  * that will be produced during this GC.
1475                  */
1476                 if (ENABLED (ALL_GC_EVENTS_MASK))
1477                         sync_point (SYNC_POINT_WORLD_STOP);
1478
1479                 /*
1480                  * All heap events are surrounded by a HEAP_START and a HEAP_ENV event.
1481                  * Right now, that's the case for GC Moves, GC Roots or heapshots.
1482                  */
1483                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1484                         ENTER_LOG (&heap_starts_ctr, logbuffer,
1485                                 EVENT_SIZE /* event */
1486                         );
1487
1488                         emit_event (logbuffer, TYPE_HEAP_START | TYPE_HEAP);
1489
1490                         EXIT_LOG_EXPLICIT (DO_SEND);
1491                 }
1492
1493                 break;
1494         case MONO_GC_EVENT_PRE_START_WORLD:
1495                 if (do_heap_shot && do_heap_walk)
1496                         mono_gc_walk_heap (0, gc_reference, NULL);
1497
1498                 /* Matching HEAP_END to the HEAP_START from above */
1499                 if (ENABLED (PROFLOG_GC_MOVES_EVENTS | PROFLOG_GC_ROOT_EVENTS) || do_heap_walk) {
1500                         ENTER_LOG (&heap_ends_ctr, logbuffer,
1501                                 EVENT_SIZE /* event */
1502                         );
1503
1504                         emit_event (logbuffer, TYPE_HEAP_END | TYPE_HEAP);
1505
1506                         EXIT_LOG_EXPLICIT (DO_SEND);
1507                 }
1508
1509                 if (do_heap_shot && do_heap_walk) {
1510                         do_heap_walk = FALSE;
1511                         heapshot_requested = 0;
1512                         last_hs_time = current_time ();
1513                 }
1514
1515                 /*
1516                  * Similarly, we must now make sure that any object moves
1517                  * written to the GC thread's buffer are flushed. Otherwise,
1518                  * object allocation events for certain addresses could come
1519                  * after the move events that made those addresses available.
1520                  */
1521                 if (ENABLED (ALL_GC_EVENTS_MASK))
1522                         sync_point_mark (SYNC_POINT_WORLD_START);
1523                 break;
1524         case MONO_GC_EVENT_POST_START_WORLD_UNLOCKED:
1525                 /*
1526                  * Finally, it is safe to allow other threads to write to
1527                  * their buffers again.
1528                  */
1529                 buffer_unlock_excl ();
1530                 break;
1531         default:
1532                 break;
1533         }
1534 }
1535
1536 static void
1537 gc_resize (MonoProfiler *profiler, int64_t new_size)
1538 {
1539         ENTER_LOG (&gc_resizes_ctr, logbuffer,
1540                 EVENT_SIZE /* event */ +
1541                 LEB128_SIZE /* new size */
1542         );
1543
1544         emit_event (logbuffer, TYPE_GC_RESIZE | TYPE_GC);
1545         emit_value (logbuffer, new_size);
1546
1547         EXIT_LOG_EXPLICIT (DO_SEND);
1548 }
1549
1550 typedef struct {
1551         int count;
1552         MonoMethod* methods [MAX_FRAMES];
1553         int32_t il_offsets [MAX_FRAMES];
1554         int32_t native_offsets [MAX_FRAMES];
1555 } FrameData;
1556
1557 static int num_frames = MAX_FRAMES;
1558
1559 static mono_bool
1560 walk_stack (MonoMethod *method, int32_t native_offset, int32_t il_offset, mono_bool managed, void* data)
1561 {
1562         FrameData *frame = (FrameData *)data;
1563         if (method && frame->count < num_frames) {
1564                 frame->il_offsets [frame->count] = il_offset;
1565                 frame->native_offsets [frame->count] = native_offset;
1566                 frame->methods [frame->count++] = method;
1567                 //printf ("In %d %s at %d (native: %d)\n", frame->count, mono_method_get_name (method), il_offset, native_offset);
1568         }
1569         return frame->count == num_frames;
1570 }
1571
1572 /*
1573  * a note about stack walks: they can cause more profiler events to fire,
1574  * so we need to make sure they don't happen after we started emitting an
1575  * event, hence the collect_bt/emit_bt split.
1576  */
1577 static void
1578 collect_bt (FrameData *data)
1579 {
1580         data->count = 0;
1581         mono_stack_walk_no_il (walk_stack, data);
1582 }
1583
1584 static void
1585 emit_bt (MonoProfiler *prof, LogBuffer *logbuffer, FrameData *data)
1586 {
1587         /* FIXME: this is actually tons of data and we should
1588          * just output it the first time and use an id the next
1589          */
1590         if (data->count > num_frames)
1591                 printf ("bad num frames: %d\n", data->count);
1592         emit_value (logbuffer, data->count);
1593         //if (*p != data.count) {
1594         //      printf ("bad num frames enc at %d: %d -> %d\n", count, data.count, *p); printf ("frames end: %p->%p\n", p, logbuffer->cursor); exit(0);}
1595         while (data->count) {
1596                 emit_method (logbuffer, data->methods [--data->count]);
1597         }
1598 }
1599
1600 static void
1601 gc_alloc (MonoProfiler *prof, MonoObject *obj, MonoClass *klass)
1602 {
1603         init_thread (prof, TRUE);
1604
1605         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_ALLOC_BT : 0;
1606         FrameData data;
1607         uintptr_t len = mono_object_get_size (obj);
1608         /* account for object alignment in the heap */
1609         len += 7;
1610         len &= ~7;
1611
1612         if (do_bt)
1613                 collect_bt (&data);
1614
1615         ENTER_LOG (&gc_allocs_ctr, logbuffer,
1616                 EVENT_SIZE /* event */ +
1617                 LEB128_SIZE /* klass */ +
1618                 LEB128_SIZE /* obj */ +
1619                 LEB128_SIZE /* size */ +
1620                 (do_bt ? (
1621                         LEB128_SIZE /* count */ +
1622                         data.count * (
1623                                 LEB128_SIZE /* method */
1624                         )
1625                 ) : 0)
1626         );
1627
1628         emit_event (logbuffer, do_bt | TYPE_ALLOC);
1629         emit_ptr (logbuffer, klass);
1630         emit_obj (logbuffer, obj);
1631         emit_value (logbuffer, len);
1632
1633         if (do_bt)
1634                 emit_bt (prof, logbuffer, &data);
1635
1636         EXIT_LOG;
1637 }
1638
1639 static void
1640 gc_moves (MonoProfiler *prof, void **objects, int num)
1641 {
1642         ENTER_LOG (&gc_moves_ctr, logbuffer,
1643                 EVENT_SIZE /* event */ +
1644                 LEB128_SIZE /* num */ +
1645                 num * (
1646                         LEB128_SIZE /* object */
1647                 )
1648         );
1649
1650         emit_event (logbuffer, TYPE_GC_MOVE | TYPE_GC);
1651         emit_value (logbuffer, num);
1652
1653         for (int i = 0; i < num; ++i)
1654                 emit_obj (logbuffer, objects [i]);
1655
1656         EXIT_LOG_EXPLICIT (DO_SEND);
1657 }
1658
1659 static void
1660 gc_handle (MonoProfiler *prof, int op, int type, uintptr_t handle, MonoObject *obj)
1661 {
1662         int do_bt = nocalls && InterlockedRead (&runtime_inited) && !notraces;
1663         FrameData data;
1664
1665         if (do_bt)
1666                 collect_bt (&data);
1667
1668         gint32 *ctr = op == MONO_PROFILER_GC_HANDLE_CREATED ? &gc_handle_creations_ctr : &gc_handle_deletions_ctr;
1669
1670         ENTER_LOG (ctr, logbuffer,
1671                 EVENT_SIZE /* event */ +
1672                 LEB128_SIZE /* type */ +
1673                 LEB128_SIZE /* handle */ +
1674                 (op == MONO_PROFILER_GC_HANDLE_CREATED ? (
1675                         LEB128_SIZE /* obj */
1676                 ) : 0) +
1677                 (do_bt ? (
1678                         LEB128_SIZE /* count */ +
1679                         data.count * (
1680                                 LEB128_SIZE /* method */
1681                         )
1682                 ) : 0)
1683         );
1684
1685         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1686                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_CREATED_BT : TYPE_GC_HANDLE_CREATED) | TYPE_GC);
1687         else if (op == MONO_PROFILER_GC_HANDLE_DESTROYED)
1688                 emit_event (logbuffer, (do_bt ? TYPE_GC_HANDLE_DESTROYED_BT : TYPE_GC_HANDLE_DESTROYED) | TYPE_GC);
1689         else
1690                 g_assert_not_reached ();
1691
1692         emit_value (logbuffer, type);
1693         emit_value (logbuffer, handle);
1694
1695         if (op == MONO_PROFILER_GC_HANDLE_CREATED)
1696                 emit_obj (logbuffer, obj);
1697
1698         if (do_bt)
1699                 emit_bt (prof, logbuffer, &data);
1700
1701         EXIT_LOG;
1702 }
1703
1704 static void
1705 finalize_begin (MonoProfiler *prof)
1706 {
1707         ENTER_LOG (&finalize_begins_ctr, buf,
1708                 EVENT_SIZE /* event */
1709         );
1710
1711         emit_event (buf, TYPE_GC_FINALIZE_START | TYPE_GC);
1712
1713         EXIT_LOG;
1714 }
1715
1716 static void
1717 finalize_end (MonoProfiler *prof)
1718 {
1719         trigger_on_demand_heapshot ();
1720         if (ENABLED (PROFLOG_FINALIZATION_EVENTS)) {
1721                 ENTER_LOG (&finalize_ends_ctr, buf,
1722                         EVENT_SIZE /* event */
1723                 );
1724
1725                 emit_event (buf, TYPE_GC_FINALIZE_END | TYPE_GC);
1726
1727                 EXIT_LOG;
1728         }
1729 }
1730
1731 static void
1732 finalize_object_begin (MonoProfiler *prof, MonoObject *obj)
1733 {
1734         ENTER_LOG (&finalize_object_begins_ctr, buf,
1735                 EVENT_SIZE /* event */ +
1736                 LEB128_SIZE /* obj */
1737         );
1738
1739         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_START | TYPE_GC);
1740         emit_obj (buf, obj);
1741
1742         EXIT_LOG;
1743 }
1744
1745 static void
1746 finalize_object_end (MonoProfiler *prof, MonoObject *obj)
1747 {
1748         ENTER_LOG (&finalize_object_ends_ctr, buf,
1749                 EVENT_SIZE /* event */ +
1750                 LEB128_SIZE /* obj */
1751         );
1752
1753         emit_event (buf, TYPE_GC_FINALIZE_OBJECT_END | TYPE_GC);
1754         emit_obj (buf, obj);
1755
1756         EXIT_LOG;
1757 }
1758
1759 static char*
1760 push_nesting (char *p, MonoClass *klass)
1761 {
1762         MonoClass *nesting;
1763         const char *name;
1764         const char *nspace;
1765         nesting = mono_class_get_nesting_type (klass);
1766         if (nesting) {
1767                 p = push_nesting (p, nesting);
1768                 *p++ = '/';
1769                 *p = 0;
1770         }
1771         name = mono_class_get_name (klass);
1772         nspace = mono_class_get_namespace (klass);
1773         if (*nspace) {
1774                 strcpy (p, nspace);
1775                 p += strlen (nspace);
1776                 *p++ = '.';
1777                 *p = 0;
1778         }
1779         strcpy (p, name);
1780         p += strlen (name);
1781         return p;
1782 }
1783
1784 static char*
1785 type_name (MonoClass *klass)
1786 {
1787         char buf [1024];
1788         char *p;
1789         push_nesting (buf, klass);
1790         p = (char *) g_malloc (strlen (buf) + 1);
1791         strcpy (p, buf);
1792         return p;
1793 }
1794
1795 static void
1796 image_loaded (MonoProfiler *prof, MonoImage *image, int result)
1797 {
1798         if (result != MONO_PROFILE_OK)
1799                 return;
1800
1801         const char *name = mono_image_get_filename (image);
1802         int nlen = strlen (name) + 1;
1803
1804         ENTER_LOG (&image_loads_ctr, logbuffer,
1805                 EVENT_SIZE /* event */ +
1806                 BYTE_SIZE /* type */ +
1807                 LEB128_SIZE /* image */ +
1808                 nlen /* name */
1809         );
1810
1811         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1812         emit_byte (logbuffer, TYPE_IMAGE);
1813         emit_ptr (logbuffer, image);
1814         memcpy (logbuffer->cursor, name, nlen);
1815         logbuffer->cursor += nlen;
1816
1817         EXIT_LOG;
1818 }
1819
1820 static void
1821 image_unloaded (MonoProfiler *prof, MonoImage *image)
1822 {
1823         const char *name = mono_image_get_filename (image);
1824         int nlen = strlen (name) + 1;
1825
1826         ENTER_LOG (&image_unloads_ctr, logbuffer,
1827                 EVENT_SIZE /* event */ +
1828                 BYTE_SIZE /* type */ +
1829                 LEB128_SIZE /* image */ +
1830                 nlen /* name */
1831         );
1832
1833         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1834         emit_byte (logbuffer, TYPE_IMAGE);
1835         emit_ptr (logbuffer, image);
1836         memcpy (logbuffer->cursor, name, nlen);
1837         logbuffer->cursor += nlen;
1838
1839         EXIT_LOG;
1840 }
1841
1842 static void
1843 assembly_loaded (MonoProfiler *prof, MonoAssembly *assembly, int result)
1844 {
1845         if (result != MONO_PROFILE_OK)
1846                 return;
1847
1848         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1849         int nlen = strlen (name) + 1;
1850         MonoImage *image = mono_assembly_get_image (assembly);
1851
1852         ENTER_LOG (&assembly_loads_ctr, logbuffer,
1853                 EVENT_SIZE /* event */ +
1854                 BYTE_SIZE /* type */ +
1855                 LEB128_SIZE /* assembly */ +
1856                 LEB128_SIZE /* image */ +
1857                 nlen /* name */
1858         );
1859
1860         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1861         emit_byte (logbuffer, TYPE_ASSEMBLY);
1862         emit_ptr (logbuffer, assembly);
1863         emit_ptr (logbuffer, image);
1864         memcpy (logbuffer->cursor, name, nlen);
1865         logbuffer->cursor += nlen;
1866
1867         EXIT_LOG;
1868
1869         mono_free (name);
1870 }
1871
1872 static void
1873 assembly_unloaded (MonoProfiler *prof, MonoAssembly *assembly)
1874 {
1875         char *name = mono_stringify_assembly_name (mono_assembly_get_name (assembly));
1876         int nlen = strlen (name) + 1;
1877         MonoImage *image = mono_assembly_get_image (assembly);
1878
1879         ENTER_LOG (&assembly_unloads_ctr, logbuffer,
1880                 EVENT_SIZE /* event */ +
1881                 BYTE_SIZE /* type */ +
1882                 LEB128_SIZE /* assembly */ +
1883                 LEB128_SIZE /* image */ +
1884                 nlen /* name */
1885         );
1886
1887         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1888         emit_byte (logbuffer, TYPE_ASSEMBLY);
1889         emit_ptr (logbuffer, assembly);
1890         emit_ptr (logbuffer, image);
1891         memcpy (logbuffer->cursor, name, nlen);
1892         logbuffer->cursor += nlen;
1893
1894         EXIT_LOG;
1895
1896         mono_free (name);
1897 }
1898
1899 static void
1900 class_loaded (MonoProfiler *prof, MonoClass *klass, int result)
1901 {
1902         if (result != MONO_PROFILE_OK)
1903                 return;
1904
1905         char *name;
1906
1907         if (InterlockedRead (&runtime_inited))
1908                 name = mono_type_get_name (mono_class_get_type (klass));
1909         else
1910                 name = type_name (klass);
1911
1912         int nlen = strlen (name) + 1;
1913         MonoImage *image = mono_class_get_image (klass);
1914
1915         ENTER_LOG (&class_loads_ctr, logbuffer,
1916                 EVENT_SIZE /* event */ +
1917                 BYTE_SIZE /* type */ +
1918                 LEB128_SIZE /* klass */ +
1919                 LEB128_SIZE /* image */ +
1920                 nlen /* name */
1921         );
1922
1923         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
1924         emit_byte (logbuffer, TYPE_CLASS);
1925         emit_ptr (logbuffer, klass);
1926         emit_ptr (logbuffer, image);
1927         memcpy (logbuffer->cursor, name, nlen);
1928         logbuffer->cursor += nlen;
1929
1930         EXIT_LOG;
1931
1932         if (runtime_inited)
1933                 mono_free (name);
1934         else
1935                 g_free (name);
1936 }
1937
1938 static void
1939 class_unloaded (MonoProfiler *prof, MonoClass *klass)
1940 {
1941         char *name;
1942
1943         if (InterlockedRead (&runtime_inited))
1944                 name = mono_type_get_name (mono_class_get_type (klass));
1945         else
1946                 name = type_name (klass);
1947
1948         int nlen = strlen (name) + 1;
1949         MonoImage *image = mono_class_get_image (klass);
1950
1951         ENTER_LOG (&class_unloads_ctr, logbuffer,
1952                 EVENT_SIZE /* event */ +
1953                 BYTE_SIZE /* type */ +
1954                 LEB128_SIZE /* klass */ +
1955                 LEB128_SIZE /* image */ +
1956                 nlen /* name */
1957         );
1958
1959         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
1960         emit_byte (logbuffer, TYPE_CLASS);
1961         emit_ptr (logbuffer, klass);
1962         emit_ptr (logbuffer, image);
1963         memcpy (logbuffer->cursor, name, nlen);
1964         logbuffer->cursor += nlen;
1965
1966         EXIT_LOG;
1967
1968         if (runtime_inited)
1969                 mono_free (name);
1970         else
1971                 g_free (name);
1972 }
1973
1974 static void process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method);
1975
1976 static void
1977 method_enter (MonoProfiler *prof, MonoMethod *method)
1978 {
1979         process_method_enter_coverage (prof, method);
1980
1981         if (!only_coverage && PROF_TLS_GET ()->call_depth++ <= max_call_depth) {
1982                 ENTER_LOG (&method_entries_ctr, logbuffer,
1983                         EVENT_SIZE /* event */ +
1984                         LEB128_SIZE /* method */
1985                 );
1986
1987                 emit_event (logbuffer, TYPE_ENTER | TYPE_METHOD);
1988                 emit_method (logbuffer, method);
1989
1990                 EXIT_LOG;
1991         }
1992 }
1993
1994 static void
1995 method_leave (MonoProfiler *prof, MonoMethod *method)
1996 {
1997         if (!only_coverage && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
1998                 ENTER_LOG (&method_exits_ctr, logbuffer,
1999                         EVENT_SIZE /* event */ +
2000                         LEB128_SIZE /* method */
2001                 );
2002
2003                 emit_event (logbuffer, TYPE_LEAVE | TYPE_METHOD);
2004                 emit_method (logbuffer, method);
2005
2006                 EXIT_LOG;
2007         }
2008 }
2009
2010 static void
2011 method_exc_leave (MonoProfiler *prof, MonoMethod *method)
2012 {
2013         if (!only_coverage && !nocalls && --PROF_TLS_GET ()->call_depth <= max_call_depth) {
2014                 ENTER_LOG (&method_exception_exits_ctr, logbuffer,
2015                         EVENT_SIZE /* event */ +
2016                         LEB128_SIZE /* method */
2017                 );
2018
2019                 emit_event (logbuffer, TYPE_EXC_LEAVE | TYPE_METHOD);
2020                 emit_method (logbuffer, method);
2021
2022                 EXIT_LOG;
2023         }
2024 }
2025
2026 static void
2027 method_jitted (MonoProfiler *prof, MonoMethod *method, MonoJitInfo *ji, int result)
2028 {
2029         if (result != MONO_PROFILE_OK)
2030                 return;
2031
2032         register_method_local (method, ji);
2033 }
2034
2035 static void
2036 code_buffer_new (MonoProfiler *prof, void *buffer, int size, MonoProfilerCodeBufferType type, void *data)
2037 {
2038         char *name;
2039         int nlen;
2040
2041         if (type == MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE) {
2042                 name = (char *) data;
2043                 nlen = strlen (name) + 1;
2044         } else {
2045                 name = NULL;
2046                 nlen = 0;
2047         }
2048
2049         ENTER_LOG (&code_buffers_ctr, logbuffer,
2050                 EVENT_SIZE /* event */ +
2051                 BYTE_SIZE /* type */ +
2052                 LEB128_SIZE /* buffer */ +
2053                 LEB128_SIZE /* size */ +
2054                 (name ? (
2055                         nlen /* name */
2056                 ) : 0)
2057         );
2058
2059         emit_event (logbuffer, TYPE_JITHELPER | TYPE_RUNTIME);
2060         emit_byte (logbuffer, type);
2061         emit_ptr (logbuffer, buffer);
2062         emit_value (logbuffer, size);
2063
2064         if (name) {
2065                 memcpy (logbuffer->cursor, name, nlen);
2066                 logbuffer->cursor += nlen;
2067         }
2068
2069         EXIT_LOG;
2070 }
2071
2072 static void
2073 throw_exc (MonoProfiler *prof, MonoObject *object)
2074 {
2075         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_THROW_BT : 0;
2076         FrameData data;
2077
2078         if (do_bt)
2079                 collect_bt (&data);
2080
2081         ENTER_LOG (&exception_throws_ctr, logbuffer,
2082                 EVENT_SIZE /* event */ +
2083                 LEB128_SIZE /* object */ +
2084                 (do_bt ? (
2085                         LEB128_SIZE /* count */ +
2086                         data.count * (
2087                                 LEB128_SIZE /* method */
2088                         )
2089                 ) : 0)
2090         );
2091
2092         emit_event (logbuffer, do_bt | TYPE_EXCEPTION);
2093         emit_obj (logbuffer, object);
2094
2095         if (do_bt)
2096                 emit_bt (prof, logbuffer, &data);
2097
2098         EXIT_LOG;
2099 }
2100
2101 static void
2102 clause_exc (MonoProfiler *prof, MonoMethod *method, int clause_type, int clause_num)
2103 {
2104         ENTER_LOG (&exception_clauses_ctr, logbuffer,
2105                 EVENT_SIZE /* event */ +
2106                 BYTE_SIZE /* clause type */ +
2107                 LEB128_SIZE /* clause num */ +
2108                 LEB128_SIZE /* method */
2109         );
2110
2111         emit_event (logbuffer, TYPE_EXCEPTION | TYPE_CLAUSE);
2112         emit_byte (logbuffer, clause_type);
2113         emit_value (logbuffer, clause_num);
2114         emit_method (logbuffer, method);
2115
2116         EXIT_LOG;
2117 }
2118
2119 static void
2120 monitor_event (MonoProfiler *profiler, MonoObject *object, MonoProfilerMonitorEvent ev)
2121 {
2122         int do_bt = (nocalls && InterlockedRead (&runtime_inited) && !notraces) ? TYPE_MONITOR_BT : 0;
2123         FrameData data;
2124
2125         if (do_bt)
2126                 collect_bt (&data);
2127
2128         ENTER_LOG (&monitor_events_ctr, logbuffer,
2129                 EVENT_SIZE /* event */ +
2130                 BYTE_SIZE /* ev */ +
2131                 LEB128_SIZE /* object */ +
2132                 (do_bt ? (
2133                         LEB128_SIZE /* count */ +
2134                         data.count * (
2135                                 LEB128_SIZE /* method */
2136                         )
2137                 ) : 0)
2138         );
2139
2140         emit_event (logbuffer, do_bt | TYPE_MONITOR);
2141         emit_byte (logbuffer, ev);
2142         emit_obj (logbuffer, object);
2143
2144         if (do_bt)
2145                 emit_bt (profiler, logbuffer, &data);
2146
2147         EXIT_LOG;
2148 }
2149
2150 static void
2151 thread_start (MonoProfiler *prof, uintptr_t tid)
2152 {
2153         init_thread (prof, TRUE);
2154
2155         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2156                 ENTER_LOG (&thread_starts_ctr, logbuffer,
2157                         EVENT_SIZE /* event */ +
2158                         BYTE_SIZE /* type */ +
2159                         LEB128_SIZE /* tid */
2160                 );
2161
2162                 emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2163                 emit_byte (logbuffer, TYPE_THREAD);
2164                 emit_ptr (logbuffer, (void*) tid);
2165
2166                 EXIT_LOG;
2167         }
2168 }
2169
2170 static void
2171 thread_end (MonoProfiler *prof, uintptr_t tid)
2172 {
2173         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2174                 ENTER_LOG (&thread_ends_ctr, logbuffer,
2175                         EVENT_SIZE /* event */ +
2176                         BYTE_SIZE /* type */ +
2177                         LEB128_SIZE /* tid */
2178                 );
2179
2180                 emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2181                 emit_byte (logbuffer, TYPE_THREAD);
2182                 emit_ptr (logbuffer, (void*) tid);
2183
2184                 EXIT_LOG_EXPLICIT (NO_SEND);
2185         }
2186
2187         MonoProfilerThread *thread = PROF_TLS_GET ();
2188
2189         thread->ended = TRUE;
2190         remove_thread (thread);
2191
2192         PROF_TLS_SET (NULL);
2193 }
2194
2195 static void
2196 thread_name (MonoProfiler *prof, uintptr_t tid, const char *name)
2197 {
2198         int len = strlen (name) + 1;
2199
2200         if (ENABLED (PROFLOG_THREAD_EVENTS)) {
2201                 ENTER_LOG (&thread_names_ctr, logbuffer,
2202                         EVENT_SIZE /* event */ +
2203                         BYTE_SIZE /* type */ +
2204                         LEB128_SIZE /* tid */ +
2205                         len /* name */
2206                 );
2207
2208                 emit_event (logbuffer, TYPE_METADATA);
2209                 emit_byte (logbuffer, TYPE_THREAD);
2210                 emit_ptr (logbuffer, (void*)tid);
2211                 memcpy (logbuffer->cursor, name, len);
2212                 logbuffer->cursor += len;
2213
2214                 EXIT_LOG;
2215         }
2216 }
2217
2218 static void
2219 domain_loaded (MonoProfiler *prof, MonoDomain *domain, int result)
2220 {
2221         if (result != MONO_PROFILE_OK)
2222                 return;
2223
2224         ENTER_LOG (&domain_loads_ctr, logbuffer,
2225                 EVENT_SIZE /* event */ +
2226                 BYTE_SIZE /* type */ +
2227                 LEB128_SIZE /* domain id */
2228         );
2229
2230         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2231         emit_byte (logbuffer, TYPE_DOMAIN);
2232         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2233
2234         EXIT_LOG;
2235 }
2236
2237 static void
2238 domain_unloaded (MonoProfiler *prof, MonoDomain *domain)
2239 {
2240         ENTER_LOG (&domain_unloads_ctr, logbuffer,
2241                 EVENT_SIZE /* event */ +
2242                 BYTE_SIZE /* type */ +
2243                 LEB128_SIZE /* domain id */
2244         );
2245
2246         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2247         emit_byte (logbuffer, TYPE_DOMAIN);
2248         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2249
2250         EXIT_LOG;
2251 }
2252
2253 static void
2254 domain_name (MonoProfiler *prof, MonoDomain *domain, const char *name)
2255 {
2256         int nlen = strlen (name) + 1;
2257
2258         ENTER_LOG (&domain_names_ctr, logbuffer,
2259                 EVENT_SIZE /* event */ +
2260                 BYTE_SIZE /* type */ +
2261                 LEB128_SIZE /* domain id */ +
2262                 nlen /* name */
2263         );
2264
2265         emit_event (logbuffer, TYPE_METADATA);
2266         emit_byte (logbuffer, TYPE_DOMAIN);
2267         emit_ptr (logbuffer, (void*)(uintptr_t) mono_domain_get_id (domain));
2268         memcpy (logbuffer->cursor, name, nlen);
2269         logbuffer->cursor += nlen;
2270
2271         EXIT_LOG;
2272 }
2273
2274 static void
2275 context_loaded (MonoProfiler *prof, MonoAppContext *context)
2276 {
2277         ENTER_LOG (&context_loads_ctr, logbuffer,
2278                 EVENT_SIZE /* event */ +
2279                 BYTE_SIZE /* type */ +
2280                 LEB128_SIZE /* context id */ +
2281                 LEB128_SIZE /* domain id */
2282         );
2283
2284         emit_event (logbuffer, TYPE_END_LOAD | TYPE_METADATA);
2285         emit_byte (logbuffer, TYPE_CONTEXT);
2286         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2287         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2288
2289         EXIT_LOG;
2290 }
2291
2292 static void
2293 context_unloaded (MonoProfiler *prof, MonoAppContext *context)
2294 {
2295         ENTER_LOG (&context_unloads_ctr, logbuffer,
2296                 EVENT_SIZE /* event */ +
2297                 BYTE_SIZE /* type */ +
2298                 LEB128_SIZE /* context id */ +
2299                 LEB128_SIZE /* domain id */
2300         );
2301
2302         emit_event (logbuffer, TYPE_END_UNLOAD | TYPE_METADATA);
2303         emit_byte (logbuffer, TYPE_CONTEXT);
2304         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_id (context));
2305         emit_ptr (logbuffer, (void*)(uintptr_t) mono_context_get_domain_id (context));
2306
2307         EXIT_LOG;
2308 }
2309
2310 typedef struct {
2311         MonoMethod *method;
2312         MonoDomain *domain;
2313         void *base_address;
2314         int offset;
2315 } AsyncFrameInfo;
2316
2317 typedef struct {
2318         MonoLockFreeQueueNode node;
2319         MonoProfiler *prof;
2320         uint64_t time;
2321         uintptr_t tid;
2322         void *ip;
2323         int count;
2324         AsyncFrameInfo frames [MONO_ZERO_LEN_ARRAY];
2325 } SampleHit;
2326
2327 static mono_bool
2328 async_walk_stack (MonoMethod *method, MonoDomain *domain, void *base_address, int offset, void *data)
2329 {
2330         SampleHit *sample = (SampleHit *) data;
2331
2332         if (sample->count < num_frames) {
2333                 int i = sample->count;
2334
2335                 sample->frames [i].method = method;
2336                 sample->frames [i].domain = domain;
2337                 sample->frames [i].base_address = base_address;
2338                 sample->frames [i].offset = offset;
2339
2340                 sample->count++;
2341         }
2342
2343         return sample->count == num_frames;
2344 }
2345
2346 #define SAMPLE_SLOT_SIZE(FRAMES) (sizeof (SampleHit) + sizeof (AsyncFrameInfo) * (FRAMES - MONO_ZERO_LEN_ARRAY))
2347 #define SAMPLE_BLOCK_SIZE (mono_pagesize ())
2348
2349 static void
2350 enqueue_sample_hit (gpointer p)
2351 {
2352         SampleHit *sample = p;
2353
2354         mono_lock_free_queue_node_unpoison (&sample->node);
2355         mono_lock_free_queue_enqueue (&sample->prof->dumper_queue, &sample->node);
2356         mono_os_sem_post (&sample->prof->dumper_queue_sem);
2357 }
2358
2359 static void
2360 mono_sample_hit (MonoProfiler *profiler, unsigned char *ip, void *context)
2361 {
2362         /*
2363          * Please note: We rely on the runtime loading the profiler with
2364          * MONO_DL_EAGER (RTLD_NOW) so that references to runtime functions within
2365          * this function (and its siblings) are resolved when the profiler is
2366          * loaded. Otherwise, we would potentially invoke the dynamic linker when
2367          * invoking runtime functions, which is not async-signal-safe.
2368          */
2369
2370         if (InterlockedRead (&in_shutdown))
2371                 return;
2372
2373         SampleHit *sample = (SampleHit *) mono_lock_free_queue_dequeue (&profiler->sample_reuse_queue);
2374
2375         if (!sample) {
2376                 /*
2377                  * If we're out of reusable sample events and we're not allowed to
2378                  * allocate more, we have no choice but to drop the event.
2379                  */
2380                 if (InterlockedRead (&sample_allocations_ctr) >= max_allocated_sample_hits)
2381                         return;
2382
2383                 sample = mono_lock_free_alloc (&profiler->sample_allocator);
2384                 sample->prof = profiler;
2385                 mono_lock_free_queue_node_init (&sample->node, TRUE);
2386
2387                 InterlockedIncrement (&sample_allocations_ctr);
2388         }
2389
2390         sample->count = 0;
2391         mono_stack_walk_async_safe (&async_walk_stack, context, sample);
2392
2393         sample->time = current_time ();
2394         sample->tid = thread_id ();
2395         sample->ip = ip;
2396
2397         mono_thread_hazardous_try_free (sample, enqueue_sample_hit);
2398 }
2399
2400 static uintptr_t *code_pages = 0;
2401 static int num_code_pages = 0;
2402 static int size_code_pages = 0;
2403 #define CPAGE_SHIFT (9)
2404 #define CPAGE_SIZE (1 << CPAGE_SHIFT)
2405 #define CPAGE_MASK (~(CPAGE_SIZE - 1))
2406 #define CPAGE_ADDR(p) ((p) & CPAGE_MASK)
2407
2408 static uintptr_t
2409 add_code_page (uintptr_t *hash, uintptr_t hsize, uintptr_t page)
2410 {
2411         uintptr_t i;
2412         uintptr_t start_pos;
2413         start_pos = (page >> CPAGE_SHIFT) % hsize;
2414         i = start_pos;
2415         do {
2416                 if (hash [i] && CPAGE_ADDR (hash [i]) == CPAGE_ADDR (page)) {
2417                         return 0;
2418                 } else if (!hash [i]) {
2419                         hash [i] = page;
2420                         return 1;
2421                 }
2422                 /* wrap around */
2423                 if (++i == hsize)
2424                         i = 0;
2425         } while (i != start_pos);
2426         /* should not happen */
2427         printf ("failed code page store\n");
2428         return 0;
2429 }
2430
2431 static void
2432 add_code_pointer (uintptr_t ip)
2433 {
2434         uintptr_t i;
2435         if (num_code_pages * 2 >= size_code_pages) {
2436                 uintptr_t *n;
2437                 uintptr_t old_size = size_code_pages;
2438                 size_code_pages *= 2;
2439                 if (size_code_pages == 0)
2440                         size_code_pages = 16;
2441                 n = (uintptr_t *) g_calloc (sizeof (uintptr_t) * size_code_pages, 1);
2442                 for (i = 0; i < old_size; ++i) {
2443                         if (code_pages [i])
2444                                 add_code_page (n, size_code_pages, code_pages [i]);
2445                 }
2446                 if (code_pages)
2447                         g_free (code_pages);
2448                 code_pages = n;
2449         }
2450         num_code_pages += add_code_page (code_pages, size_code_pages, ip & CPAGE_MASK);
2451 }
2452
2453 /* ELF code crashes on some systems. */
2454 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2455 #if 0
2456 static void
2457 dump_ubin (MonoProfiler *prof, const char *filename, uintptr_t load_addr, uint64_t offset, uintptr_t size)
2458 {
2459         int len = strlen (filename) + 1;
2460
2461         ENTER_LOG (&sample_ubins_ctr, logbuffer,
2462                 EVENT_SIZE /* event */ +
2463                 LEB128_SIZE /* load address */ +
2464                 LEB128_SIZE /* offset */ +
2465                 LEB128_SIZE /* size */ +
2466                 nlen /* file name */
2467         );
2468
2469         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_UBIN);
2470         emit_svalue (logbuffer, load_addr);
2471         emit_uvalue (logbuffer, offset);
2472         emit_uvalue (logbuffer, size);
2473         memcpy (logbuffer->cursor, filename, len);
2474         logbuffer->cursor += len;
2475
2476         EXIT_LOG_EXPLICIT (DO_SEND);
2477 }
2478 #endif
2479
2480 static void
2481 dump_usym (MonoProfiler *prof, const char *name, uintptr_t value, uintptr_t size)
2482 {
2483         int len = strlen (name) + 1;
2484
2485         ENTER_LOG (&sample_usyms_ctr, logbuffer,
2486                 EVENT_SIZE /* event */ +
2487                 LEB128_SIZE /* value */ +
2488                 LEB128_SIZE /* size */ +
2489                 len /* name */
2490         );
2491
2492         emit_event (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_USYM);
2493         emit_ptr (logbuffer, (void*)value);
2494         emit_value (logbuffer, size);
2495         memcpy (logbuffer->cursor, name, len);
2496         logbuffer->cursor += len;
2497
2498         EXIT_LOG_EXPLICIT (DO_SEND);
2499 }
2500
2501 /* ELF code crashes on some systems. */
2502 //#if defined(ELFMAG0)
2503 #if 0
2504
2505 #if SIZEOF_VOID_P == 4
2506 #define ELF_WSIZE 32
2507 #else
2508 #define ELF_WSIZE 64
2509 #endif
2510 #ifndef ElfW
2511 #define ElfW(type)      _ElfW (Elf, ELF_WSIZE, type)
2512 #define _ElfW(e,w,t)    _ElfW_1 (e, w, _##t)
2513 #define _ElfW_1(e,w,t)  e##w##t
2514 #endif
2515
2516 static void
2517 dump_elf_symbols (MonoProfiler *prof, ElfW(Sym) *symbols, int num_symbols, const char *strtab, void *load_addr)
2518 {
2519         int i;
2520         for (i = 0; i < num_symbols; ++i) {
2521                 const char* sym;
2522                 sym =  strtab + symbols [i].st_name;
2523                 if (!symbols [i].st_name || !symbols [i].st_size || (symbols [i].st_info & 0xf) != STT_FUNC)
2524                         continue;
2525                 //printf ("symbol %s at %d\n", sym, symbols [i].st_value);
2526                 dump_usym (sym, (uintptr_t)load_addr + symbols [i].st_value, symbols [i].st_size);
2527         }
2528 }
2529
2530 static int
2531 read_elf_symbols (MonoProfiler *prof, const char *filename, void *load_addr)
2532 {
2533         int fd, i;
2534         void *data;
2535         struct stat statb;
2536         uint64_t file_size;
2537         ElfW(Ehdr) *header;
2538         ElfW(Shdr) *sheader;
2539         ElfW(Shdr) *shstrtabh;
2540         ElfW(Shdr) *symtabh = NULL;
2541         ElfW(Shdr) *strtabh = NULL;
2542         ElfW(Sym) *symbols = NULL;
2543         const char *strtab;
2544         int num_symbols;
2545
2546         fd = open (filename, O_RDONLY);
2547         if (fd < 0)
2548                 return 0;
2549         if (fstat (fd, &statb) != 0) {
2550                 close (fd);
2551                 return 0;
2552         }
2553         file_size = statb.st_size;
2554         data = mmap (NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
2555         close (fd);
2556         if (data == MAP_FAILED)
2557                 return 0;
2558         header = data;
2559         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2560                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2561                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2562                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2563                 munmap (data, file_size);
2564                 return 0;
2565         }
2566         sheader = (void*)((char*)data + header->e_shoff);
2567         shstrtabh = (void*)((char*)sheader + (header->e_shentsize * header->e_shstrndx));
2568         strtab = (const char*)data + shstrtabh->sh_offset;
2569         for (i = 0; i < header->e_shnum; ++i) {
2570                 //printf ("section header: %d\n", sheader->sh_type);
2571                 if (sheader->sh_type == SHT_SYMTAB) {
2572                         symtabh = sheader;
2573                         strtabh = (void*)((char*)data + header->e_shoff + sheader->sh_link * header->e_shentsize);
2574                         /*printf ("symtab section header: %d, .strstr: %d\n", i, sheader->sh_link);*/
2575                         break;
2576                 }
2577                 sheader = (void*)((char*)sheader + header->e_shentsize);
2578         }
2579         if (!symtabh || !strtabh) {
2580                 munmap (data, file_size);
2581                 return 0;
2582         }
2583         strtab = (const char*)data + strtabh->sh_offset;
2584         num_symbols = symtabh->sh_size / symtabh->sh_entsize;
2585         symbols = (void*)((char*)data + symtabh->sh_offset);
2586         dump_elf_symbols (symbols, num_symbols, strtab, load_addr);
2587         munmap (data, file_size);
2588         return 1;
2589 }
2590 #endif
2591
2592 /* ELF code crashes on some systems. */
2593 //#if defined(HAVE_DL_ITERATE_PHDR) && defined(ELFMAG0)
2594 #if 0
2595 static int
2596 elf_dl_callback (struct dl_phdr_info *info, size_t size, void *data)
2597 {
2598         MonoProfiler *prof = data;
2599         char buf [256];
2600         const char *filename;
2601         BinaryObject *obj;
2602         char *a = (void*)info->dlpi_addr;
2603         int i, num_sym;
2604         ElfW(Dyn) *dyn = NULL;
2605         ElfW(Sym) *symtab = NULL;
2606         ElfW(Word) *hash_table = NULL;
2607         ElfW(Ehdr) *header = NULL;
2608         const char* strtab = NULL;
2609         for (obj = prof->binary_objects; obj; obj = obj->next) {
2610                 if (obj->addr == a)
2611                         return 0;
2612         }
2613         filename = info->dlpi_name;
2614         if (!filename)
2615                 return 0;
2616         if (!info->dlpi_addr && !filename [0]) {
2617                 int l = readlink ("/proc/self/exe", buf, sizeof (buf) - 1);
2618                 if (l > 0) {
2619                         buf [l] = 0;
2620                         filename = buf;
2621                 }
2622         }
2623         obj = g_calloc (sizeof (BinaryObject), 1);
2624         obj->addr = (void*)info->dlpi_addr;
2625         obj->name = pstrdup (filename);
2626         obj->next = prof->binary_objects;
2627         prof->binary_objects = obj;
2628         //printf ("loaded file: %s at %p, segments: %d\n", filename, (void*)info->dlpi_addr, info->dlpi_phnum);
2629         a = NULL;
2630         for (i = 0; i < info->dlpi_phnum; ++i) {
2631                 //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);
2632                 if (info->dlpi_phdr[i].p_type == PT_LOAD && !header) {
2633                         header = (ElfW(Ehdr)*)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2634                         if (header->e_ident [EI_MAG0] != ELFMAG0 ||
2635                                         header->e_ident [EI_MAG1] != ELFMAG1 ||
2636                                         header->e_ident [EI_MAG2] != ELFMAG2 ||
2637                                         header->e_ident [EI_MAG3] != ELFMAG3 ) {
2638                                 header = NULL;
2639                         }
2640                         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);
2641                 } else if (info->dlpi_phdr[i].p_type == PT_DYNAMIC) {
2642                         dyn = (ElfW(Dyn) *)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
2643                 }
2644         }
2645         if (read_elf_symbols (prof, filename, (void*)info->dlpi_addr))
2646                 return 0;
2647         if (!info->dlpi_name || !info->dlpi_name[0])
2648                 return 0;
2649         if (!dyn)
2650                 return 0;
2651         for (i = 0; dyn [i].d_tag != DT_NULL; ++i) {
2652                 if (dyn [i].d_tag == DT_SYMTAB) {
2653                         if (symtab && do_debug)
2654                                 printf ("multiple symtabs: %d\n", i);
2655                         symtab = (ElfW(Sym) *)(a + dyn [i].d_un.d_ptr);
2656                 } else if (dyn [i].d_tag == DT_HASH) {
2657                         hash_table = (ElfW(Word) *)(a + dyn [i].d_un.d_ptr);
2658                 } else if (dyn [i].d_tag == DT_STRTAB) {
2659                         strtab = (const char*)(a + dyn [i].d_un.d_ptr);
2660                 }
2661         }
2662         if (!hash_table)
2663                 return 0;
2664         num_sym = hash_table [1];
2665         dump_elf_symbols (prof, symtab, num_sym, strtab, (void*)info->dlpi_addr);
2666         return 0;
2667 }
2668
2669 static int
2670 load_binaries (MonoProfiler *prof)
2671 {
2672         dl_iterate_phdr (elf_dl_callback, prof);
2673         return 1;
2674 }
2675 #else
2676 static int
2677 load_binaries (MonoProfiler *prof)
2678 {
2679         return 0;
2680 }
2681 #endif
2682
2683 static const char*
2684 symbol_for (uintptr_t code)
2685 {
2686 #ifdef HAVE_DLADDR
2687         void *ip = (void*)code;
2688         Dl_info di;
2689         if (dladdr (ip, &di)) {
2690                 if (di.dli_sname)
2691                         return di.dli_sname;
2692         } else {
2693         /*      char **names;
2694                 names = backtrace_symbols (&ip, 1);
2695                 if (names) {
2696                         const char* p = names [0];
2697                         g_free (names);
2698                         return p;
2699                 }
2700                 */
2701         }
2702 #endif
2703         return NULL;
2704 }
2705
2706 static void
2707 dump_unmanaged_coderefs (MonoProfiler *prof)
2708 {
2709         int i;
2710         const char* last_symbol;
2711         uintptr_t addr, page_end;
2712
2713         if (load_binaries (prof))
2714                 return;
2715         for (i = 0; i < size_code_pages; ++i) {
2716                 const char* sym;
2717                 if (!code_pages [i] || code_pages [i] & 1)
2718                         continue;
2719                 last_symbol = NULL;
2720                 addr = CPAGE_ADDR (code_pages [i]);
2721                 page_end = addr + CPAGE_SIZE;
2722                 code_pages [i] |= 1;
2723                 /* we dump the symbols for the whole page */
2724                 for (; addr < page_end; addr += 16) {
2725                         sym = symbol_for (addr);
2726                         if (sym && sym == last_symbol)
2727                                 continue;
2728                         last_symbol = sym;
2729                         if (!sym)
2730                                 continue;
2731                         dump_usym (prof, sym, addr, 0); /* let's not guess the size */
2732                         //printf ("found symbol at %p: %s\n", (void*)addr, sym);
2733                 }
2734         }
2735 }
2736
2737 typedef struct MonoCounterAgent {
2738         MonoCounter *counter;
2739         // MonoCounterAgent specific data :
2740         void *value;
2741         size_t value_size;
2742         short index;
2743         short emitted;
2744         struct MonoCounterAgent *next;
2745 } MonoCounterAgent;
2746
2747 static MonoCounterAgent* counters;
2748 static int counters_index = 1;
2749 static mono_mutex_t counters_mutex;
2750
2751 static void
2752 counters_add_agent (MonoCounter *counter)
2753 {
2754         if (InterlockedRead (&in_shutdown))
2755                 return;
2756
2757         MonoCounterAgent *agent, *item;
2758
2759         mono_os_mutex_lock (&counters_mutex);
2760
2761         for (agent = counters; agent; agent = agent->next) {
2762                 if (agent->counter == counter) {
2763                         agent->value_size = 0;
2764                         if (agent->value) {
2765                                 g_free (agent->value);
2766                                 agent->value = NULL;
2767                         }
2768                         goto done;
2769                 }
2770         }
2771
2772         agent = (MonoCounterAgent *) g_malloc (sizeof (MonoCounterAgent));
2773         agent->counter = counter;
2774         agent->value = NULL;
2775         agent->value_size = 0;
2776         agent->index = counters_index++;
2777         agent->emitted = 0;
2778         agent->next = NULL;
2779
2780         if (!counters) {
2781                 counters = agent;
2782         } else {
2783                 item = counters;
2784                 while (item->next)
2785                         item = item->next;
2786                 item->next = agent;
2787         }
2788
2789 done:
2790         mono_os_mutex_unlock (&counters_mutex);
2791 }
2792
2793 static mono_bool
2794 counters_init_foreach_callback (MonoCounter *counter, gpointer data)
2795 {
2796         counters_add_agent (counter);
2797         return TRUE;
2798 }
2799
2800 static void
2801 counters_init (MonoProfiler *profiler)
2802 {
2803         mono_os_mutex_init (&counters_mutex);
2804
2805         mono_counters_on_register (&counters_add_agent);
2806         mono_counters_foreach (counters_init_foreach_callback, NULL);
2807 }
2808
2809 static void
2810 counters_emit (MonoProfiler *profiler)
2811 {
2812         MonoCounterAgent *agent;
2813         int len = 0;
2814         int size =
2815                 EVENT_SIZE /* event */ +
2816                 LEB128_SIZE /* len */
2817         ;
2818
2819         mono_os_mutex_lock (&counters_mutex);
2820
2821         for (agent = counters; agent; agent = agent->next) {
2822                 if (agent->emitted)
2823                         continue;
2824
2825                 size +=
2826                         LEB128_SIZE /* section */ +
2827                         strlen (mono_counter_get_name (agent->counter)) + 1 /* name */ +
2828                         BYTE_SIZE /* type */ +
2829                         BYTE_SIZE /* unit */ +
2830                         BYTE_SIZE /* variance */ +
2831                         LEB128_SIZE /* index */
2832                 ;
2833
2834                 len++;
2835         }
2836
2837         if (!len)
2838                 goto done;
2839
2840         ENTER_LOG (&counter_descriptors_ctr, logbuffer, size);
2841
2842         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
2843         emit_value (logbuffer, len);
2844
2845         for (agent = counters; agent; agent = agent->next) {
2846                 const char *name;
2847
2848                 if (agent->emitted)
2849                         continue;
2850
2851                 name = mono_counter_get_name (agent->counter);
2852                 emit_value (logbuffer, mono_counter_get_section (agent->counter));
2853                 emit_string (logbuffer, name, strlen (name) + 1);
2854                 emit_byte (logbuffer, mono_counter_get_type (agent->counter));
2855                 emit_byte (logbuffer, mono_counter_get_unit (agent->counter));
2856                 emit_byte (logbuffer, mono_counter_get_variance (agent->counter));
2857                 emit_value (logbuffer, agent->index);
2858
2859                 agent->emitted = 1;
2860         }
2861
2862         EXIT_LOG_EXPLICIT (DO_SEND);
2863
2864 done:
2865         mono_os_mutex_unlock (&counters_mutex);
2866 }
2867
2868 static void
2869 counters_sample (MonoProfiler *profiler, uint64_t timestamp)
2870 {
2871         MonoCounterAgent *agent;
2872         MonoCounter *counter;
2873         int type;
2874         int buffer_size;
2875         void *buffer;
2876         int size;
2877
2878         counters_emit (profiler);
2879
2880         buffer_size = 8;
2881         buffer = g_calloc (1, buffer_size);
2882
2883         mono_os_mutex_lock (&counters_mutex);
2884
2885         size =
2886                 EVENT_SIZE /* event */
2887         ;
2888
2889         for (agent = counters; agent; agent = agent->next) {
2890                 size +=
2891                         LEB128_SIZE /* index */ +
2892                         BYTE_SIZE /* type */ +
2893                         mono_counter_get_size (agent->counter) /* value */
2894                 ;
2895         }
2896
2897         size +=
2898                 LEB128_SIZE /* stop marker */
2899         ;
2900
2901         ENTER_LOG (&counter_samples_ctr, logbuffer, size);
2902
2903         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
2904
2905         for (agent = counters; agent; agent = agent->next) {
2906                 size_t size;
2907
2908                 counter = agent->counter;
2909
2910                 size = mono_counter_get_size (counter);
2911
2912                 if (size > buffer_size) {
2913                         buffer_size = size;
2914                         buffer = g_realloc (buffer, buffer_size);
2915                 }
2916
2917                 memset (buffer, 0, buffer_size);
2918
2919                 g_assert (mono_counters_sample (counter, buffer, size));
2920
2921                 type = mono_counter_get_type (counter);
2922
2923                 if (!agent->value) {
2924                         agent->value = g_calloc (1, size);
2925                         agent->value_size = size;
2926                 } else {
2927                         if (type == MONO_COUNTER_STRING) {
2928                                 if (strcmp (agent->value, buffer) == 0)
2929                                         continue;
2930                         } else {
2931                                 if (agent->value_size == size && memcmp (agent->value, buffer, size) == 0)
2932                                         continue;
2933                         }
2934                 }
2935
2936                 emit_uvalue (logbuffer, agent->index);
2937                 emit_byte (logbuffer, type);
2938                 switch (type) {
2939                 case MONO_COUNTER_INT:
2940 #if SIZEOF_VOID_P == 4
2941                 case MONO_COUNTER_WORD:
2942 #endif
2943                         emit_svalue (logbuffer, *(int*)buffer - *(int*)agent->value);
2944                         break;
2945                 case MONO_COUNTER_UINT:
2946                         emit_uvalue (logbuffer, *(guint*)buffer - *(guint*)agent->value);
2947                         break;
2948                 case MONO_COUNTER_TIME_INTERVAL:
2949                 case MONO_COUNTER_LONG:
2950 #if SIZEOF_VOID_P == 8
2951                 case MONO_COUNTER_WORD:
2952 #endif
2953                         emit_svalue (logbuffer, *(gint64*)buffer - *(gint64*)agent->value);
2954                         break;
2955                 case MONO_COUNTER_ULONG:
2956                         emit_uvalue (logbuffer, *(guint64*)buffer - *(guint64*)agent->value);
2957                         break;
2958                 case MONO_COUNTER_DOUBLE:
2959                         emit_double (logbuffer, *(double*)buffer);
2960                         break;
2961                 case MONO_COUNTER_STRING:
2962                         if (size == 0) {
2963                                 emit_byte (logbuffer, 0);
2964                         } else {
2965                                 emit_byte (logbuffer, 1);
2966                                 emit_string (logbuffer, (char*)buffer, size);
2967                         }
2968                         break;
2969                 default:
2970                         g_assert_not_reached ();
2971                 }
2972
2973                 if (type == MONO_COUNTER_STRING && size > agent->value_size) {
2974                         agent->value = g_realloc (agent->value, size);
2975                         agent->value_size = size;
2976                 }
2977
2978                 if (size > 0)
2979                         memcpy (agent->value, buffer, size);
2980         }
2981         g_free (buffer);
2982
2983         emit_value (logbuffer, 0);
2984
2985         EXIT_LOG_EXPLICIT (DO_SEND);
2986
2987         mono_os_mutex_unlock (&counters_mutex);
2988 }
2989
2990 typedef struct _PerfCounterAgent PerfCounterAgent;
2991 struct _PerfCounterAgent {
2992         PerfCounterAgent *next;
2993         int index;
2994         char *category_name;
2995         char *name;
2996         int type;
2997         gint64 value;
2998         guint8 emitted;
2999         guint8 updated;
3000         guint8 deleted;
3001 };
3002
3003 static PerfCounterAgent *perfcounters = NULL;
3004
3005 static void
3006 perfcounters_emit (MonoProfiler *profiler)
3007 {
3008         PerfCounterAgent *pcagent;
3009         int len = 0;
3010         int size =
3011                 EVENT_SIZE /* event */ +
3012                 LEB128_SIZE /* len */
3013         ;
3014
3015         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3016                 if (pcagent->emitted)
3017                         continue;
3018
3019                 size +=
3020                         LEB128_SIZE /* section */ +
3021                         strlen (pcagent->category_name) + 1 /* category name */ +
3022                         strlen (pcagent->name) + 1 /* name */ +
3023                         BYTE_SIZE /* type */ +
3024                         BYTE_SIZE /* unit */ +
3025                         BYTE_SIZE /* variance */ +
3026                         LEB128_SIZE /* index */
3027                 ;
3028
3029                 len++;
3030         }
3031
3032         if (!len)
3033                 return;
3034
3035         ENTER_LOG (&perfcounter_descriptors_ctr, logbuffer, size);
3036
3037         emit_event (logbuffer, TYPE_SAMPLE_COUNTERS_DESC | TYPE_SAMPLE);
3038         emit_value (logbuffer, len);
3039
3040         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3041                 if (pcagent->emitted)
3042                         continue;
3043
3044                 emit_value (logbuffer, MONO_COUNTER_PERFCOUNTERS);
3045                 emit_string (logbuffer, pcagent->category_name, strlen (pcagent->category_name) + 1);
3046                 emit_string (logbuffer, pcagent->name, strlen (pcagent->name) + 1);
3047                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3048                 emit_byte (logbuffer, MONO_COUNTER_RAW);
3049                 emit_byte (logbuffer, MONO_COUNTER_VARIABLE);
3050                 emit_value (logbuffer, pcagent->index);
3051
3052                 pcagent->emitted = 1;
3053         }
3054
3055         EXIT_LOG_EXPLICIT (DO_SEND);
3056 }
3057
3058 static gboolean
3059 perfcounters_foreach (char *category_name, char *name, unsigned char type, gint64 value, gpointer user_data)
3060 {
3061         PerfCounterAgent *pcagent;
3062
3063         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3064                 if (strcmp (pcagent->category_name, category_name) != 0 || strcmp (pcagent->name, name) != 0)
3065                         continue;
3066                 if (pcagent->value == value)
3067                         return TRUE;
3068
3069                 pcagent->value = value;
3070                 pcagent->updated = 1;
3071                 pcagent->deleted = 0;
3072                 return TRUE;
3073         }
3074
3075         pcagent = g_new0 (PerfCounterAgent, 1);
3076         pcagent->next = perfcounters;
3077         pcagent->index = counters_index++;
3078         pcagent->category_name = g_strdup (category_name);
3079         pcagent->name = g_strdup (name);
3080         pcagent->type = (int) type;
3081         pcagent->value = value;
3082         pcagent->emitted = 0;
3083         pcagent->updated = 1;
3084         pcagent->deleted = 0;
3085
3086         perfcounters = pcagent;
3087
3088         return TRUE;
3089 }
3090
3091 static void
3092 perfcounters_sample (MonoProfiler *profiler, uint64_t timestamp)
3093 {
3094         PerfCounterAgent *pcagent;
3095         int len = 0;
3096         int size;
3097
3098         mono_os_mutex_lock (&counters_mutex);
3099
3100         /* mark all perfcounters as deleted, foreach will unmark them as necessary */
3101         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next)
3102                 pcagent->deleted = 1;
3103
3104         mono_perfcounter_foreach (perfcounters_foreach, perfcounters);
3105
3106         perfcounters_emit (profiler);
3107
3108         size =
3109                 EVENT_SIZE /* event */
3110         ;
3111
3112         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3113                 if (pcagent->deleted || !pcagent->updated)
3114                         continue;
3115
3116                 size +=
3117                         LEB128_SIZE /* index */ +
3118                         BYTE_SIZE /* type */ +
3119                         LEB128_SIZE /* value */
3120                 ;
3121
3122                 len++;
3123         }
3124
3125         if (!len)
3126                 goto done;
3127
3128         size +=
3129                 LEB128_SIZE /* stop marker */
3130         ;
3131
3132         ENTER_LOG (&perfcounter_samples_ctr, logbuffer, size);
3133
3134         emit_event_time (logbuffer, TYPE_SAMPLE_COUNTERS | TYPE_SAMPLE, timestamp);
3135
3136         for (pcagent = perfcounters; pcagent; pcagent = pcagent->next) {
3137                 if (pcagent->deleted || !pcagent->updated)
3138                         continue;
3139                 emit_uvalue (logbuffer, pcagent->index);
3140                 emit_byte (logbuffer, MONO_COUNTER_LONG);
3141                 emit_svalue (logbuffer, pcagent->value);
3142
3143                 pcagent->updated = 0;
3144         }
3145
3146         emit_value (logbuffer, 0);
3147
3148         EXIT_LOG_EXPLICIT (DO_SEND);
3149
3150 done:
3151         mono_os_mutex_unlock (&counters_mutex);
3152 }
3153
3154 static void
3155 counters_and_perfcounters_sample (MonoProfiler *prof)
3156 {
3157         uint64_t now = current_time ();
3158
3159         counters_sample (prof, now);
3160         perfcounters_sample (prof, now);
3161 }
3162
3163 #define COVERAGE_DEBUG(x) if (debug_coverage) {x}
3164 static mono_mutex_t coverage_mutex;
3165 static MonoConcurrentHashTable *coverage_methods = NULL;
3166 static MonoConcurrentHashTable *coverage_assemblies = NULL;
3167 static MonoConcurrentHashTable *coverage_classes = NULL;
3168
3169 static MonoConcurrentHashTable *filtered_classes = NULL;
3170 static MonoConcurrentHashTable *entered_methods = NULL;
3171 static MonoConcurrentHashTable *image_to_methods = NULL;
3172 static MonoConcurrentHashTable *suppressed_assemblies = NULL;
3173 static gboolean coverage_initialized = FALSE;
3174
3175 static GPtrArray *coverage_data = NULL;
3176 static int previous_offset = 0;
3177
3178 typedef struct {
3179         MonoLockFreeQueueNode node;
3180         MonoMethod *method;
3181 } MethodNode;
3182
3183 typedef struct {
3184         int offset;
3185         int counter;
3186         char *filename;
3187         int line;
3188         int column;
3189 } CoverageEntry;
3190
3191 static void
3192 free_coverage_entry (gpointer data, gpointer userdata)
3193 {
3194         CoverageEntry *entry = (CoverageEntry *)data;
3195         g_free (entry->filename);
3196         g_free (entry);
3197 }
3198
3199 static void
3200 obtain_coverage_for_method (MonoProfiler *prof, const MonoProfileCoverageEntry *entry)
3201 {
3202         int offset = entry->iloffset - previous_offset;
3203         CoverageEntry *e = g_new (CoverageEntry, 1);
3204
3205         previous_offset = entry->iloffset;
3206
3207         e->offset = offset;
3208         e->counter = entry->counter;
3209         e->filename = g_strdup(entry->filename ? entry->filename : "");
3210         e->line = entry->line;
3211         e->column = entry->col;
3212
3213         g_ptr_array_add (coverage_data, e);
3214 }
3215
3216 static char *
3217 parse_generic_type_names(char *name)
3218 {
3219         char *new_name, *ret;
3220         int within_generic_declaration = 0, generic_members = 1;
3221
3222         if (name == NULL || *name == '\0')
3223                 return g_strdup ("");
3224
3225         if (!(ret = new_name = (char *) g_calloc (strlen (name) * 4 + 1, sizeof (char))))
3226                 return NULL;
3227
3228         do {
3229                 switch (*name) {
3230                         case '<':
3231                                 within_generic_declaration = 1;
3232                                 break;
3233
3234                         case '>':
3235                                 within_generic_declaration = 0;
3236
3237                                 if (*(name - 1) != '<') {
3238                                         *new_name++ = '`';
3239                                         *new_name++ = '0' + generic_members;
3240                                 } else {
3241                                         memcpy (new_name, "&lt;&gt;", 8);
3242                                         new_name += 8;
3243                                 }
3244
3245                                 generic_members = 0;
3246                                 break;
3247
3248                         case ',':
3249                                 generic_members++;
3250                                 break;
3251
3252                         default:
3253                                 if (!within_generic_declaration)
3254                                         *new_name++ = *name;
3255
3256                                 break;
3257                 }
3258         } while (*name++);
3259
3260         return ret;
3261 }
3262
3263 static int method_id;
3264 static void
3265 build_method_buffer (gpointer key, gpointer value, gpointer userdata)
3266 {
3267         MonoMethod *method = (MonoMethod *)value;
3268         MonoProfiler *prof = (MonoProfiler *)userdata;
3269         MonoClass *klass;
3270         MonoImage *image;
3271         char *class_name;
3272         const char *image_name, *method_name, *sig, *first_filename;
3273         guint i;
3274
3275         previous_offset = 0;
3276         coverage_data = g_ptr_array_new ();
3277
3278         mono_profiler_coverage_get (prof, method, obtain_coverage_for_method);
3279
3280         klass = mono_method_get_class (method);
3281         image = mono_class_get_image (klass);
3282         image_name = mono_image_get_name (image);
3283
3284         sig = mono_signature_get_desc (mono_method_signature (method), TRUE);
3285         class_name = parse_generic_type_names (mono_type_get_name (mono_class_get_type (klass)));
3286         method_name = mono_method_get_name (method);
3287
3288         if (coverage_data->len != 0) {
3289                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[0];
3290                 first_filename = entry->filename ? entry->filename : "";
3291         } else
3292                 first_filename = "";
3293
3294         image_name = image_name ? image_name : "";
3295         sig = sig ? sig : "";
3296         method_name = method_name ? method_name : "";
3297
3298         ENTER_LOG (&coverage_methods_ctr, logbuffer,
3299                 EVENT_SIZE /* event */ +
3300                 strlen (image_name) + 1 /* image name */ +
3301                 strlen (class_name) + 1 /* class name */ +
3302                 strlen (method_name) + 1 /* method name */ +
3303                 strlen (sig) + 1 /* signature */ +
3304                 strlen (first_filename) + 1 /* first file name */ +
3305                 LEB128_SIZE /* token */ +
3306                 LEB128_SIZE /* method id */ +
3307                 LEB128_SIZE /* entries */
3308         );
3309
3310         emit_event (logbuffer, TYPE_COVERAGE_METHOD | TYPE_COVERAGE);
3311         emit_string (logbuffer, image_name, strlen (image_name) + 1);
3312         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3313         emit_string (logbuffer, method_name, strlen (method_name) + 1);
3314         emit_string (logbuffer, sig, strlen (sig) + 1);
3315         emit_string (logbuffer, first_filename, strlen (first_filename) + 1);
3316
3317         emit_uvalue (logbuffer, mono_method_get_token (method));
3318         emit_uvalue (logbuffer, method_id);
3319         emit_value (logbuffer, coverage_data->len);
3320
3321         EXIT_LOG_EXPLICIT (DO_SEND);
3322
3323         for (i = 0; i < coverage_data->len; i++) {
3324                 CoverageEntry *entry = (CoverageEntry *)coverage_data->pdata[i];
3325
3326                 ENTER_LOG (&coverage_statements_ctr, logbuffer,
3327                         EVENT_SIZE /* event */ +
3328                         LEB128_SIZE /* method id */ +
3329                         LEB128_SIZE /* offset */ +
3330                         LEB128_SIZE /* counter */ +
3331                         LEB128_SIZE /* line */ +
3332                         LEB128_SIZE /* column */
3333                 );
3334
3335                 emit_event (logbuffer, TYPE_COVERAGE_STATEMENT | TYPE_COVERAGE);
3336                 emit_uvalue (logbuffer, method_id);
3337                 emit_uvalue (logbuffer, entry->offset);
3338                 emit_uvalue (logbuffer, entry->counter);
3339                 emit_uvalue (logbuffer, entry->line);
3340                 emit_uvalue (logbuffer, entry->column);
3341
3342                 EXIT_LOG_EXPLICIT (DO_SEND);
3343         }
3344
3345         method_id++;
3346
3347         g_free (class_name);
3348
3349         g_ptr_array_foreach (coverage_data, free_coverage_entry, NULL);
3350         g_ptr_array_free (coverage_data, TRUE);
3351         coverage_data = NULL;
3352 }
3353
3354 /* This empties the queue */
3355 static guint
3356 count_queue (MonoLockFreeQueue *queue)
3357 {
3358         MonoLockFreeQueueNode *node;
3359         guint count = 0;
3360
3361         while ((node = mono_lock_free_queue_dequeue (queue))) {
3362                 count++;
3363                 mono_thread_hazardous_try_free (node, g_free);
3364         }
3365
3366         return count;
3367 }
3368
3369 static void
3370 build_class_buffer (gpointer key, gpointer value, gpointer userdata)
3371 {
3372         MonoClass *klass = (MonoClass *)key;
3373         MonoLockFreeQueue *class_methods = (MonoLockFreeQueue *)value;
3374         MonoImage *image;
3375         char *class_name;
3376         const char *assembly_name;
3377         int number_of_methods, partially_covered;
3378         guint fully_covered;
3379
3380         image = mono_class_get_image (klass);
3381         assembly_name = mono_image_get_name (image);
3382         class_name = mono_type_get_name (mono_class_get_type (klass));
3383
3384         assembly_name = assembly_name ? assembly_name : "";
3385         number_of_methods = mono_class_num_methods (klass);
3386         fully_covered = count_queue (class_methods);
3387         /* We don't handle partial covered yet */
3388         partially_covered = 0;
3389
3390         ENTER_LOG (&coverage_classes_ctr, logbuffer,
3391                 EVENT_SIZE /* event */ +
3392                 strlen (assembly_name) + 1 /* assembly name */ +
3393                 strlen (class_name) + 1 /* class name */ +
3394                 LEB128_SIZE /* no. methods */ +
3395                 LEB128_SIZE /* fully covered */ +
3396                 LEB128_SIZE /* partially covered */
3397         );
3398
3399         emit_event (logbuffer, TYPE_COVERAGE_CLASS | TYPE_COVERAGE);
3400         emit_string (logbuffer, assembly_name, strlen (assembly_name) + 1);
3401         emit_string (logbuffer, class_name, strlen (class_name) + 1);
3402         emit_uvalue (logbuffer, number_of_methods);
3403         emit_uvalue (logbuffer, fully_covered);
3404         emit_uvalue (logbuffer, partially_covered);
3405
3406         EXIT_LOG_EXPLICIT (DO_SEND);
3407
3408         g_free (class_name);
3409 }
3410
3411 static void
3412 get_coverage_for_image (MonoImage *image, int *number_of_methods, guint *fully_covered, int *partially_covered)
3413 {
3414         MonoLockFreeQueue *image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3415
3416         *number_of_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
3417         if (image_methods)
3418                 *fully_covered = count_queue (image_methods);
3419         else
3420                 *fully_covered = 0;
3421
3422         // FIXME: We don't handle partially covered yet.
3423         *partially_covered = 0;
3424 }
3425
3426 static void
3427 build_assembly_buffer (gpointer key, gpointer value, gpointer userdata)
3428 {
3429         MonoAssembly *assembly = (MonoAssembly *)value;
3430         MonoImage *image = mono_assembly_get_image (assembly);
3431         const char *name, *guid, *filename;
3432         int number_of_methods = 0, partially_covered = 0;
3433         guint fully_covered = 0;
3434
3435         name = mono_image_get_name (image);
3436         guid = mono_image_get_guid (image);
3437         filename = mono_image_get_filename (image);
3438
3439         name = name ? name : "";
3440         guid = guid ? guid : "";
3441         filename = filename ? filename : "";
3442
3443         get_coverage_for_image (image, &number_of_methods, &fully_covered, &partially_covered);
3444
3445         ENTER_LOG (&coverage_assemblies_ctr, logbuffer,
3446                 EVENT_SIZE /* event */ +
3447                 strlen (name) + 1 /* name */ +
3448                 strlen (guid) + 1 /* guid */ +
3449                 strlen (filename) + 1 /* file name */ +
3450                 LEB128_SIZE /* no. methods */ +
3451                 LEB128_SIZE /* fully covered */ +
3452                 LEB128_SIZE /* partially covered */
3453         );
3454
3455         emit_event (logbuffer, TYPE_COVERAGE_ASSEMBLY | TYPE_COVERAGE);
3456         emit_string (logbuffer, name, strlen (name) + 1);
3457         emit_string (logbuffer, guid, strlen (guid) + 1);
3458         emit_string (logbuffer, filename, strlen (filename) + 1);
3459         emit_uvalue (logbuffer, number_of_methods);
3460         emit_uvalue (logbuffer, fully_covered);
3461         emit_uvalue (logbuffer, partially_covered);
3462
3463         EXIT_LOG_EXPLICIT (DO_SEND);
3464 }
3465
3466 static void
3467 dump_coverage (MonoProfiler *prof)
3468 {
3469         if (!coverage_initialized)
3470                 return;
3471
3472         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Started dump\n");)
3473         method_id = 0;
3474
3475         mono_os_mutex_lock (&coverage_mutex);
3476         mono_conc_hashtable_foreach (coverage_assemblies, build_assembly_buffer, NULL);
3477         mono_conc_hashtable_foreach (coverage_classes, build_class_buffer, NULL);
3478         mono_conc_hashtable_foreach (coverage_methods, build_method_buffer, prof);
3479         mono_os_mutex_unlock (&coverage_mutex);
3480
3481         COVERAGE_DEBUG(fprintf (stderr, "Coverage: Finished dump\n");)
3482 }
3483
3484 static void
3485 process_method_enter_coverage (MonoProfiler *prof, MonoMethod *method)
3486 {
3487         MonoClass *klass;
3488         MonoImage *image;
3489
3490         if (!coverage_initialized)
3491                 return;
3492
3493         klass = mono_method_get_class (method);
3494         image = mono_class_get_image (klass);
3495
3496         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)))
3497                 return;
3498
3499         mono_os_mutex_lock (&coverage_mutex);
3500         mono_conc_hashtable_insert (entered_methods, method, method);
3501         mono_os_mutex_unlock (&coverage_mutex);
3502 }
3503
3504 static MonoLockFreeQueueNode *
3505 create_method_node (MonoMethod *method)
3506 {
3507         MethodNode *node = (MethodNode *) g_malloc (sizeof (MethodNode));
3508         mono_lock_free_queue_node_init ((MonoLockFreeQueueNode *) node, FALSE);
3509         node->method = method;
3510
3511         return (MonoLockFreeQueueNode *) node;
3512 }
3513
3514 static gboolean
3515 coverage_filter (MonoProfiler *prof, MonoMethod *method)
3516 {
3517         MonoError error;
3518         MonoClass *klass;
3519         MonoImage *image;
3520         MonoAssembly *assembly;
3521         MonoMethodHeader *header;
3522         guint32 iflags, flags, code_size;
3523         char *fqn, *classname;
3524         gboolean has_positive, found;
3525         MonoLockFreeQueue *image_methods, *class_methods;
3526         MonoLockFreeQueueNode *node;
3527
3528         g_assert (coverage_initialized && "Why are we being asked for coverage filter info when we're not doing coverage?");
3529
3530         COVERAGE_DEBUG(fprintf (stderr, "Coverage filter for %s\n", mono_method_get_name (method));)
3531
3532         flags = mono_method_get_flags (method, &iflags);
3533         if ((iflags & 0x1000 /*METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL*/) ||
3534             (flags & 0x2000 /*METHOD_ATTRIBUTE_PINVOKE_IMPL*/)) {
3535                 COVERAGE_DEBUG(fprintf (stderr, "   Internal call or pinvoke - ignoring\n");)
3536                 return FALSE;
3537         }
3538
3539         // Don't need to do anything else if we're already tracking this method
3540         if (mono_conc_hashtable_lookup (coverage_methods, method)) {
3541                 COVERAGE_DEBUG(fprintf (stderr, "   Already tracking\n");)
3542                 return TRUE;
3543         }
3544
3545         klass = mono_method_get_class (method);
3546         image = mono_class_get_image (klass);
3547
3548         // Don't handle coverage for the core assemblies
3549         if (mono_conc_hashtable_lookup (suppressed_assemblies, (gpointer) mono_image_get_name (image)) != NULL)
3550                 return FALSE;
3551
3552         if (prof->coverage_filters) {
3553                 /* Check already filtered classes first */
3554                 if (mono_conc_hashtable_lookup (filtered_classes, klass)) {
3555                         COVERAGE_DEBUG(fprintf (stderr, "   Already filtered\n");)
3556                         return FALSE;
3557                 }
3558
3559                 classname = mono_type_get_name (mono_class_get_type (klass));
3560
3561                 fqn = g_strdup_printf ("[%s]%s", mono_image_get_name (image), classname);
3562
3563                 COVERAGE_DEBUG(fprintf (stderr, "   Looking for %s in filter\n", fqn);)
3564                 // Check positive filters first
3565                 has_positive = FALSE;
3566                 found = FALSE;
3567                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3568                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3569
3570                         if (filter [0] == '+') {
3571                                 filter = &filter [1];
3572
3573                                 COVERAGE_DEBUG(fprintf (stderr, "   Checking against +%s ...", filter);)
3574
3575                                 if (strstr (fqn, filter) != NULL) {
3576                                         COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3577                                         found = TRUE;
3578                                 } else
3579                                         COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3580
3581                                 has_positive = TRUE;
3582                         }
3583                 }
3584
3585                 if (has_positive && !found) {
3586                         COVERAGE_DEBUG(fprintf (stderr, "   Positive match was not found\n");)
3587
3588                         mono_os_mutex_lock (&coverage_mutex);
3589                         mono_conc_hashtable_insert (filtered_classes, klass, klass);
3590                         mono_os_mutex_unlock (&coverage_mutex);
3591                         g_free (fqn);
3592                         g_free (classname);
3593
3594                         return FALSE;
3595                 }
3596
3597                 for (guint i = 0; i < prof->coverage_filters->len; ++i) {
3598                         // FIXME: Is substring search sufficient?
3599                         char *filter = (char *)g_ptr_array_index (prof->coverage_filters, i);
3600                         if (filter [0] == '+')
3601                                 continue;
3602
3603                         // Skip '-'
3604                         filter = &filter [1];
3605                         COVERAGE_DEBUG(fprintf (stderr, "   Checking against -%s ...", filter);)
3606
3607                         if (strstr (fqn, filter) != NULL) {
3608                                 COVERAGE_DEBUG(fprintf (stderr, "matched\n");)
3609
3610                                 mono_os_mutex_lock (&coverage_mutex);
3611                                 mono_conc_hashtable_insert (filtered_classes, klass, klass);
3612                                 mono_os_mutex_unlock (&coverage_mutex);
3613                                 g_free (fqn);
3614                                 g_free (classname);
3615
3616                                 return FALSE;
3617                         } else
3618                                 COVERAGE_DEBUG(fprintf (stderr, "no match\n");)
3619
3620                 }
3621
3622                 g_free (fqn);
3623                 g_free (classname);
3624         }
3625
3626         COVERAGE_DEBUG(fprintf (stderr, "   Handling coverage for %s\n", mono_method_get_name (method));)
3627         header = mono_method_get_header_checked (method, &error);
3628         mono_error_cleanup (&error);
3629
3630         mono_method_header_get_code (header, &code_size, NULL);
3631
3632         assembly = mono_image_get_assembly (image);
3633
3634         // Need to keep the assemblies around for as long as they are kept in the hashtable
3635         // Nunit, for example, has a habit of unloading them before the coverage statistics are
3636         // generated causing a crash. See https://bugzilla.xamarin.com/show_bug.cgi?id=39325
3637         mono_assembly_addref (assembly);
3638
3639         mono_os_mutex_lock (&coverage_mutex);
3640         mono_conc_hashtable_insert (coverage_methods, method, method);
3641         mono_conc_hashtable_insert (coverage_assemblies, assembly, assembly);
3642         mono_os_mutex_unlock (&coverage_mutex);
3643
3644         image_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (image_to_methods, image);
3645
3646         if (image_methods == NULL) {
3647                 image_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3648                 mono_lock_free_queue_init (image_methods);
3649                 mono_os_mutex_lock (&coverage_mutex);
3650                 mono_conc_hashtable_insert (image_to_methods, image, image_methods);
3651                 mono_os_mutex_unlock (&coverage_mutex);
3652         }
3653
3654         node = create_method_node (method);
3655         mono_lock_free_queue_enqueue (image_methods, node);
3656
3657         class_methods = (MonoLockFreeQueue *)mono_conc_hashtable_lookup (coverage_classes, klass);
3658
3659         if (class_methods == NULL) {
3660                 class_methods = (MonoLockFreeQueue *) g_malloc (sizeof (MonoLockFreeQueue));
3661                 mono_lock_free_queue_init (class_methods);
3662                 mono_os_mutex_lock (&coverage_mutex);
3663                 mono_conc_hashtable_insert (coverage_classes, klass, class_methods);
3664                 mono_os_mutex_unlock (&coverage_mutex);
3665         }
3666
3667         node = create_method_node (method);
3668         mono_lock_free_queue_enqueue (class_methods, node);
3669
3670         return TRUE;
3671 }
3672
3673 #define LINE_BUFFER_SIZE 4096
3674 /* Max file limit of 128KB */
3675 #define MAX_FILE_SIZE 128 * 1024
3676 static char *
3677 get_file_content (FILE *stream)
3678 {
3679         char *buffer;
3680         ssize_t bytes_read;
3681         long filesize;
3682         int res, offset = 0;
3683
3684         res = fseek (stream, 0, SEEK_END);
3685         if (res < 0)
3686           return NULL;
3687
3688         filesize = ftell (stream);
3689         if (filesize < 0)
3690           return NULL;
3691
3692         res = fseek (stream, 0, SEEK_SET);
3693         if (res < 0)
3694           return NULL;
3695
3696         if (filesize > MAX_FILE_SIZE)
3697           return NULL;
3698
3699         buffer = (char *) g_malloc ((filesize + 1) * sizeof (char));
3700         while ((bytes_read = fread (buffer + offset, 1, LINE_BUFFER_SIZE, stream)) > 0)
3701                 offset += bytes_read;
3702
3703         /* NULL terminate our buffer */
3704         buffer[filesize] = '\0';
3705         return buffer;
3706 }
3707
3708 static char *
3709 get_next_line (char *contents, char **next_start)
3710 {
3711         char *p = contents;
3712
3713         if (p == NULL || *p == '\0') {
3714                 *next_start = NULL;
3715                 return NULL;
3716         }
3717
3718         while (*p != '\n' && *p != '\0')
3719                 p++;
3720
3721         if (*p == '\n') {
3722                 *p = '\0';
3723                 *next_start = p + 1;
3724         } else
3725                 *next_start = NULL;
3726
3727         return contents;
3728 }
3729
3730 static void
3731 init_suppressed_assemblies (void)
3732 {
3733         char *content;
3734         char *line;
3735         FILE *sa_file;
3736
3737         suppressed_assemblies = mono_conc_hashtable_new (g_str_hash, g_str_equal);
3738         sa_file = fopen (SUPPRESSION_DIR "/mono-profiler-log.suppression", "r");
3739         if (sa_file == NULL)
3740                 return;
3741
3742         /* Don't need to free @content as it is referred to by the lines stored in @suppressed_assemblies */
3743         content = get_file_content (sa_file);
3744         if (content == NULL) {
3745                 g_error ("mono-profiler-log.suppression is greater than 128kb - aborting\n");
3746         }
3747
3748         while ((line = get_next_line (content, &content))) {
3749                 line = g_strchomp (g_strchug (line));
3750                 /* No locking needed as we're doing initialization */
3751                 mono_conc_hashtable_insert (suppressed_assemblies, line, line);
3752         }
3753
3754         fclose (sa_file);
3755 }
3756
3757 static void
3758 parse_cov_filter_file (GPtrArray *filters, const char *file)
3759 {
3760         FILE *filter_file;
3761         char *line, *content;
3762
3763         filter_file = fopen (file, "r");
3764         if (filter_file == NULL) {
3765                 fprintf (stderr, "Unable to open %s\n", file);
3766                 return;
3767         }
3768
3769         /* Don't need to free content as it is referred to by the lines stored in @filters */
3770         content = get_file_content (filter_file);
3771         if (content == NULL)
3772                 fprintf (stderr, "WARNING: %s is greater than 128kb - ignoring\n", file);
3773
3774         while ((line = get_next_line (content, &content)))
3775                 g_ptr_array_add (filters, g_strchug (g_strchomp (line)));
3776
3777         fclose (filter_file);
3778 }
3779
3780 static void
3781 coverage_init (MonoProfiler *prof)
3782 {
3783         g_assert (!coverage_initialized && "Why are we initializing coverage twice?");
3784
3785         COVERAGE_DEBUG(fprintf (stderr, "Coverage initialized\n");)
3786
3787         mono_os_mutex_init (&coverage_mutex);
3788         coverage_methods = mono_conc_hashtable_new (NULL, NULL);
3789         coverage_assemblies = mono_conc_hashtable_new (NULL, NULL);
3790         coverage_classes = mono_conc_hashtable_new (NULL, NULL);
3791         filtered_classes = mono_conc_hashtable_new (NULL, NULL);
3792         entered_methods = mono_conc_hashtable_new (NULL, NULL);
3793         image_to_methods = mono_conc_hashtable_new (NULL, NULL);
3794         init_suppressed_assemblies ();
3795
3796         coverage_initialized = TRUE;
3797 }
3798
3799 static void
3800 unref_coverage_assemblies (gpointer key, gpointer value, gpointer userdata)
3801 {
3802         MonoAssembly *assembly = (MonoAssembly *)value;
3803         mono_assembly_close (assembly);
3804 }
3805
3806 static void
3807 free_sample_hit (gpointer p)
3808 {
3809         mono_lock_free_free (p, SAMPLE_BLOCK_SIZE);
3810 }
3811
3812 static void
3813 cleanup_reusable_samples (MonoProfiler *prof)
3814 {
3815         SampleHit *sample;
3816
3817         while ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->sample_reuse_queue)))
3818                 mono_thread_hazardous_try_free (sample, free_sample_hit);
3819 }
3820
3821 static void
3822 log_shutdown (MonoProfiler *prof)
3823 {
3824         InterlockedWrite (&in_shutdown, 1);
3825
3826         if (!no_counters)
3827                 counters_and_perfcounters_sample (prof);
3828
3829         dump_coverage (prof);
3830
3831         char c = 1;
3832
3833         if (write (prof->pipes [1], &c, 1) != 1) {
3834                 fprintf (stderr, "Could not write to pipe: %s\n", strerror (errno));
3835                 exit (1);
3836         }
3837
3838         mono_native_thread_join (prof->helper_thread);
3839
3840         mono_os_mutex_destroy (&counters_mutex);
3841
3842         MonoCounterAgent *mc_next;
3843
3844         for (MonoCounterAgent *cur = counters; cur; cur = mc_next) {
3845                 mc_next = cur->next;
3846                 g_free (cur);
3847         }
3848
3849         PerfCounterAgent *pc_next;
3850
3851         for (PerfCounterAgent *cur = perfcounters; cur; cur = pc_next) {
3852                 pc_next = cur->next;
3853                 g_free (cur);
3854         }
3855
3856         /*
3857          * Ensure that we empty the LLS completely, even if some nodes are
3858          * not immediately removed upon calling mono_lls_remove (), by
3859          * iterating until the head is NULL.
3860          */
3861         while (profiler_thread_list.head) {
3862                 MONO_LLS_FOREACH_SAFE (&profiler_thread_list, MonoProfilerThread, thread) {
3863                         g_assert (thread->attached && "Why is a thread in the LLS not attached?");
3864
3865                         remove_thread (thread);
3866                 } MONO_LLS_FOREACH_SAFE_END
3867         }
3868
3869         /*
3870          * Ensure that all threads have been freed, so that we don't miss any
3871          * buffers when we shut down the writer thread below.
3872          */
3873         mono_thread_hazardous_try_free_all ();
3874
3875         InterlockedWrite (&prof->run_dumper_thread, 0);
3876         mono_os_sem_post (&prof->dumper_queue_sem);
3877         mono_native_thread_join (prof->dumper_thread);
3878         mono_os_sem_destroy (&prof->dumper_queue_sem);
3879
3880         InterlockedWrite (&prof->run_writer_thread, 0);
3881         mono_os_sem_post (&prof->writer_queue_sem);
3882         mono_native_thread_join (prof->writer_thread);
3883         mono_os_sem_destroy (&prof->writer_queue_sem);
3884
3885         /*
3886          * Free all writer queue entries, and ensure that all sample hits will be
3887          * added to the sample reuse queue.
3888          */
3889         mono_thread_hazardous_try_free_all ();
3890
3891         cleanup_reusable_samples (prof);
3892
3893         /*
3894          * Finally, make sure that all sample hits are freed. This should cover all
3895          * hazardous data from the profiler. We can now be sure that the runtime
3896          * won't later invoke free functions in the profiler library after it has
3897          * been unloaded.
3898          */
3899         mono_thread_hazardous_try_free_all ();
3900
3901         g_assert (!InterlockedRead (&buffer_rwlock_count) && "Why is the reader count still non-zero?");
3902         g_assert (!InterlockedReadPointer (&buffer_rwlock_exclusive) && "Why does someone still hold the exclusive lock?");
3903
3904 #if defined (HAVE_SYS_ZLIB)
3905         if (prof->gzfile)
3906                 gzclose (prof->gzfile);
3907 #endif
3908         if (prof->pipe_output)
3909                 pclose (prof->file);
3910         else
3911                 fclose (prof->file);
3912
3913         mono_conc_hashtable_destroy (prof->method_table);
3914         mono_os_mutex_destroy (&prof->method_table_mutex);
3915
3916         if (coverage_initialized) {
3917                 mono_os_mutex_lock (&coverage_mutex);
3918                 mono_conc_hashtable_foreach (coverage_assemblies, unref_coverage_assemblies, prof);
3919                 mono_os_mutex_unlock (&coverage_mutex);
3920
3921                 mono_conc_hashtable_destroy (coverage_methods);
3922                 mono_conc_hashtable_destroy (coverage_assemblies);
3923                 mono_conc_hashtable_destroy (coverage_classes);
3924                 mono_conc_hashtable_destroy (filtered_classes);
3925
3926                 mono_conc_hashtable_destroy (entered_methods);
3927                 mono_conc_hashtable_destroy (image_to_methods);
3928                 mono_conc_hashtable_destroy (suppressed_assemblies);
3929                 mono_os_mutex_destroy (&coverage_mutex);
3930         }
3931
3932         PROF_TLS_FREE ();
3933
3934         g_free (prof->args);
3935         g_free (prof);
3936 }
3937
3938 static char*
3939 new_filename (const char* filename)
3940 {
3941         time_t t = time (NULL);
3942         int pid = process_id ();
3943         char pid_buf [16];
3944         char time_buf [16];
3945         char *res, *d;
3946         const char *p;
3947         int count_dates = 0;
3948         int count_pids = 0;
3949         int s_date, s_pid;
3950         struct tm *ts;
3951         for (p = filename; *p; p++) {
3952                 if (*p != '%')
3953                         continue;
3954                 p++;
3955                 if (*p == 't')
3956                         count_dates++;
3957                 else if (*p == 'p')
3958                         count_pids++;
3959                 else if (*p == 0)
3960                         break;
3961         }
3962         if (!count_dates && !count_pids)
3963                 return pstrdup (filename);
3964         snprintf (pid_buf, sizeof (pid_buf), "%d", pid);
3965         ts = gmtime (&t);
3966         snprintf (time_buf, sizeof (time_buf), "%d%02d%02d%02d%02d%02d",
3967                 1900 + ts->tm_year, 1 + ts->tm_mon, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
3968         s_date = strlen (time_buf);
3969         s_pid = strlen (pid_buf);
3970         d = res = (char *) g_malloc (strlen (filename) + s_date * count_dates + s_pid * count_pids);
3971         for (p = filename; *p; p++) {
3972                 if (*p != '%') {
3973                         *d++ = *p;
3974                         continue;
3975                 }
3976                 p++;
3977                 if (*p == 't') {
3978                         strcpy (d, time_buf);
3979                         d += s_date;
3980                         continue;
3981                 } else if (*p == 'p') {
3982                         strcpy (d, pid_buf);
3983                         d += s_pid;
3984                         continue;
3985                 } else if (*p == '%') {
3986                         *d++ = '%';
3987                         continue;
3988                 } else if (*p == 0)
3989                         break;
3990                 *d++ = '%';
3991                 *d++ = *p;
3992         }
3993         *d = 0;
3994         return res;
3995 }
3996
3997 static void
3998 add_to_fd_set (fd_set *set, int fd, int *max_fd)
3999 {
4000         /*
4001          * This should only trigger for the basic FDs (server socket, pipes) at
4002          * startup if for some mysterious reason they're too large. In this case,
4003          * the profiler really can't function, and we're better off printing an
4004          * error and exiting.
4005          */
4006         if (fd >= FD_SETSIZE) {
4007                 fprintf (stderr, "File descriptor is out of bounds for fd_set: %d\n", fd);
4008                 exit (1);
4009         }
4010
4011         FD_SET (fd, set);
4012
4013         if (*max_fd < fd)
4014                 *max_fd = fd;
4015 }
4016
4017 static void *
4018 helper_thread (void *arg)
4019 {
4020         MonoProfiler *prof = (MonoProfiler *) arg;
4021
4022         mono_threads_attach_tools_thread ();
4023         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler helper");
4024
4025         MonoProfilerThread *thread = init_thread (prof, FALSE);
4026
4027         GArray *command_sockets = g_array_new (FALSE, FALSE, sizeof (int));
4028
4029         while (1) {
4030                 fd_set rfds;
4031                 int max_fd = -1;
4032
4033                 FD_ZERO (&rfds);
4034
4035                 add_to_fd_set (&rfds, prof->server_socket, &max_fd);
4036                 add_to_fd_set (&rfds, prof->pipes [0], &max_fd);
4037
4038                 for (gint i = 0; i < command_sockets->len; i++)
4039                         add_to_fd_set (&rfds, g_array_index (command_sockets, int, i), &max_fd);
4040
4041                 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
4042
4043                 // Sleep for 1sec or until a file descriptor has data.
4044                 if (select (max_fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4045                         if (errno == EINTR)
4046                                 continue;
4047
4048                         fprintf (stderr, "Error in mono-profiler-log server: %s", strerror (errno));
4049                         exit (1);
4050                 }
4051
4052                 if (!no_counters)
4053                         counters_and_perfcounters_sample (prof);
4054
4055                 buffer_lock_excl ();
4056
4057                 sync_point (SYNC_POINT_PERIODIC);
4058
4059                 buffer_unlock_excl ();
4060
4061                 // Are we shutting down?
4062                 if (FD_ISSET (prof->pipes [0], &rfds)) {
4063                         char c;
4064                         read (prof->pipes [0], &c, 1);
4065                         break;
4066                 }
4067
4068                 for (gint i = 0; i < command_sockets->len; i++) {
4069                         int fd = g_array_index (command_sockets, int, i);
4070
4071                         if (!FD_ISSET (fd, &rfds))
4072                                 continue;
4073
4074                         char buf [64];
4075                         int len = read (fd, buf, sizeof (buf) - 1);
4076
4077                         if (len == -1)
4078                                 continue;
4079
4080                         if (!len) {
4081                                 // The other end disconnected.
4082                                 g_array_remove_index (command_sockets, i);
4083                                 close (fd);
4084
4085                                 continue;
4086                         }
4087
4088                         buf [len] = 0;
4089
4090                         if (!strcmp (buf, "heapshot\n") && hs_mode_ondemand) {
4091                                 // Rely on the finalization callback triggering a GC.
4092                                 heapshot_requested = 1;
4093                                 mono_gc_finalize_notify ();
4094                         }
4095                 }
4096
4097                 if (FD_ISSET (prof->server_socket, &rfds)) {
4098                         int fd = accept (prof->server_socket, NULL, NULL);
4099
4100                         if (fd != -1) {
4101                                 if (fd >= FD_SETSIZE)
4102                                         close (fd);
4103                                 else
4104                                         g_array_append_val (command_sockets, fd);
4105                         }
4106                 }
4107         }
4108
4109         for (gint i = 0; i < command_sockets->len; i++)
4110                 close (g_array_index (command_sockets, int, i));
4111
4112         g_array_free (command_sockets, TRUE);
4113
4114         send_log_unsafe (FALSE);
4115         deinit_thread (thread);
4116
4117         mono_thread_info_detach ();
4118
4119         return NULL;
4120 }
4121
4122 static void
4123 start_helper_thread (MonoProfiler* prof)
4124 {
4125         if (pipe (prof->pipes) == -1) {
4126                 fprintf (stderr, "Cannot create pipe: %s\n", strerror (errno));
4127                 exit (1);
4128         }
4129
4130         prof->server_socket = socket (PF_INET, SOCK_STREAM, 0);
4131
4132         if (prof->server_socket == -1) {
4133                 fprintf (stderr, "Cannot create server socket: %s\n", strerror (errno));
4134                 exit (1);
4135         }
4136
4137         struct sockaddr_in server_address;
4138
4139         memset (&server_address, 0, sizeof (server_address));
4140         server_address.sin_family = AF_INET;
4141         server_address.sin_addr.s_addr = INADDR_ANY;
4142         server_address.sin_port = htons (prof->command_port);
4143
4144         if (bind (prof->server_socket, (struct sockaddr *) &server_address, sizeof (server_address)) == -1) {
4145                 fprintf (stderr, "Cannot bind server socket on port %d: %s\n", prof->command_port, strerror (errno));
4146                 close (prof->server_socket);
4147                 exit (1);
4148         }
4149
4150         if (listen (prof->server_socket, 1) == -1) {
4151                 fprintf (stderr, "Cannot listen on server socket: %s\n", strerror (errno));
4152                 close (prof->server_socket);
4153                 exit (1);
4154         }
4155
4156         socklen_t slen = sizeof (server_address);
4157
4158         if (getsockname (prof->server_socket, (struct sockaddr *) &server_address, &slen)) {
4159                 fprintf (stderr, "Could not get assigned port: %s\n", strerror (errno));
4160                 close (prof->server_socket);
4161                 exit (1);
4162         }
4163
4164         prof->command_port = ntohs (server_address.sin_port);
4165
4166         if (!mono_native_thread_create (&prof->helper_thread, helper_thread, prof)) {
4167                 fprintf (stderr, "Could not start helper thread\n");
4168                 close (prof->server_socket);
4169                 exit (1);
4170         }
4171 }
4172
4173 static void
4174 free_writer_entry (gpointer p)
4175 {
4176         mono_lock_free_free (p, WRITER_ENTRY_BLOCK_SIZE);
4177 }
4178
4179 static gboolean
4180 handle_writer_queue_entry (MonoProfiler *prof)
4181 {
4182         WriterQueueEntry *entry;
4183
4184         if ((entry = (WriterQueueEntry *) mono_lock_free_queue_dequeue (&prof->writer_queue))) {
4185                 if (!entry->methods)
4186                         goto no_methods;
4187
4188                 gboolean wrote_methods = FALSE;
4189
4190                 /*
4191                  * Encode the method events in a temporary log buffer that we
4192                  * flush to disk before the main buffer, ensuring that all
4193                  * methods have metadata emitted before they're referenced.
4194                  *
4195                  * We use a 'proper' thread-local buffer for this as opposed
4196                  * to allocating and freeing a buffer by hand because the call
4197                  * to mono_method_full_name () below may trigger class load
4198                  * events when it retrieves the signature of the method. So a
4199                  * thread-local buffer needs to exist when such events occur.
4200                  */
4201                 for (guint i = 0; i < entry->methods->len; i++) {
4202                         MethodInfo *info = (MethodInfo *) g_ptr_array_index (entry->methods, i);
4203
4204                         if (mono_conc_hashtable_lookup (prof->method_table, info->method))
4205                                 goto free_info; // This method already has metadata emitted.
4206
4207                         /*
4208                          * Other threads use this hash table to get a general
4209                          * idea of whether a method has already been emitted to
4210                          * the stream. Due to the way we add to this table, it
4211                          * can easily happen that multiple threads queue up the
4212                          * same methods, but that's OK since eventually all
4213                          * methods will be in this table and the thread-local
4214                          * method lists will just be empty for the rest of the
4215                          * app's lifetime.
4216                          */
4217                         mono_os_mutex_lock (&prof->method_table_mutex);
4218                         mono_conc_hashtable_insert (prof->method_table, info->method, info->method);
4219                         mono_os_mutex_unlock (&prof->method_table_mutex);
4220
4221                         char *name = mono_method_full_name (info->method, 1);
4222                         int nlen = strlen (name) + 1;
4223                         void *cstart = info->ji ? mono_jit_info_get_code_start (info->ji) : NULL;
4224                         int csize = info->ji ? mono_jit_info_get_code_size (info->ji) : 0;
4225
4226                         ENTER_LOG (&method_jits_ctr, logbuffer,
4227                                 EVENT_SIZE /* event */ +
4228                                 LEB128_SIZE /* method */ +
4229                                 LEB128_SIZE /* start */ +
4230                                 LEB128_SIZE /* size */ +
4231                                 nlen /* name */
4232                         );
4233
4234                         emit_event_time (logbuffer, TYPE_JIT | TYPE_METHOD, info->time);
4235                         emit_method_inner (logbuffer, info->method);
4236                         emit_ptr (logbuffer, cstart);
4237                         emit_value (logbuffer, csize);
4238
4239                         memcpy (logbuffer->cursor, name, nlen);
4240                         logbuffer->cursor += nlen;
4241
4242                         EXIT_LOG_EXPLICIT (NO_SEND);
4243
4244                         mono_free (name);
4245
4246                         wrote_methods = TRUE;
4247
4248                 free_info:
4249                         g_free (info);
4250                 }
4251
4252                 g_ptr_array_free (entry->methods, TRUE);
4253
4254                 if (wrote_methods) {
4255                         dump_buffer_threadless (prof, PROF_TLS_GET ()->buffer);
4256                         init_buffer_state (PROF_TLS_GET ());
4257                 }
4258
4259         no_methods:
4260                 dump_buffer (prof, entry->buffer);
4261
4262                 mono_thread_hazardous_try_free (entry, free_writer_entry);
4263
4264                 return TRUE;
4265         }
4266
4267         return FALSE;
4268 }
4269
4270 static void *
4271 writer_thread (void *arg)
4272 {
4273         MonoProfiler *prof = (MonoProfiler *)arg;
4274
4275         mono_threads_attach_tools_thread ();
4276         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler writer");
4277
4278         dump_header (prof);
4279
4280         MonoProfilerThread *thread = init_thread (prof, FALSE);
4281
4282         while (InterlockedRead (&prof->run_writer_thread)) {
4283                 mono_os_sem_wait (&prof->writer_queue_sem, MONO_SEM_FLAGS_NONE);
4284                 handle_writer_queue_entry (prof);
4285         }
4286
4287         /* Drain any remaining entries on shutdown. */
4288         while (handle_writer_queue_entry (prof));
4289
4290         free_buffer (thread->buffer, thread->buffer->size);
4291         deinit_thread (thread);
4292
4293         mono_thread_info_detach ();
4294
4295         return NULL;
4296 }
4297
4298 static void
4299 start_writer_thread (MonoProfiler* prof)
4300 {
4301         InterlockedWrite (&prof->run_writer_thread, 1);
4302
4303         if (!mono_native_thread_create (&prof->writer_thread, writer_thread, prof)) {
4304                 fprintf (stderr, "Could not start writer thread\n");
4305                 exit (1);
4306         }
4307 }
4308
4309 static void
4310 reuse_sample_hit (gpointer p)
4311 {
4312         SampleHit *sample = p;
4313
4314         mono_lock_free_queue_node_unpoison (&sample->node);
4315         mono_lock_free_queue_enqueue (&sample->prof->sample_reuse_queue, &sample->node);
4316 }
4317
4318 static gboolean
4319 handle_dumper_queue_entry (MonoProfiler *prof)
4320 {
4321         SampleHit *sample;
4322
4323         if ((sample = (SampleHit *) mono_lock_free_queue_dequeue (&prof->dumper_queue))) {
4324                 for (int i = 0; i < sample->count; ++i) {
4325                         MonoMethod *method = sample->frames [i].method;
4326                         MonoDomain *domain = sample->frames [i].domain;
4327                         void *address = sample->frames [i].base_address;
4328
4329                         if (!method) {
4330                                 g_assert (domain && "What happened to the domain pointer?");
4331                                 g_assert (address && "What happened to the instruction pointer?");
4332
4333                                 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *) address);
4334
4335                                 if (ji)
4336                                         sample->frames [i].method = mono_jit_info_get_method (ji);
4337                         }
4338                 }
4339
4340                 ENTER_LOG (&sample_hits_ctr, logbuffer,
4341                         EVENT_SIZE /* event */ +
4342                         BYTE_SIZE /* type */ +
4343                         LEB128_SIZE /* tid */ +
4344                         LEB128_SIZE /* count */ +
4345                         1 * (
4346                                 LEB128_SIZE /* ip */
4347                         ) +
4348                         LEB128_SIZE /* managed count */ +
4349                         sample->count * (
4350                                 LEB128_SIZE /* method */
4351                         )
4352                 );
4353
4354                 emit_event_time (logbuffer, TYPE_SAMPLE | TYPE_SAMPLE_HIT, sample->time);
4355                 emit_byte (logbuffer, SAMPLE_CYCLES);
4356                 emit_ptr (logbuffer, (void *) sample->tid);
4357                 emit_value (logbuffer, 1);
4358
4359                 // TODO: Actual native unwinding.
4360                 for (int i = 0; i < 1; ++i) {
4361                         emit_ptr (logbuffer, sample->ip);
4362                         add_code_pointer ((uintptr_t) sample->ip);
4363                 }
4364
4365                 /* new in data version 6 */
4366                 emit_uvalue (logbuffer, sample->count);
4367
4368                 for (int i = 0; i < sample->count; ++i)
4369                         emit_method (logbuffer, sample->frames [i].method);
4370
4371                 EXIT_LOG_EXPLICIT (DO_SEND);
4372
4373                 mono_thread_hazardous_try_free (sample, reuse_sample_hit);
4374
4375                 dump_unmanaged_coderefs (prof);
4376         }
4377
4378         return FALSE;
4379 }
4380
4381 static void *
4382 dumper_thread (void *arg)
4383 {
4384         MonoProfiler *prof = (MonoProfiler *)arg;
4385
4386         mono_threads_attach_tools_thread ();
4387         mono_native_thread_set_name (mono_native_thread_id_get (), "Profiler dumper");
4388
4389         MonoProfilerThread *thread = init_thread (prof, FALSE);
4390
4391         while (InterlockedRead (&prof->run_dumper_thread)) {
4392                 mono_os_sem_wait (&prof->dumper_queue_sem, MONO_SEM_FLAGS_NONE);
4393                 handle_dumper_queue_entry (prof);
4394         }
4395
4396         /* Drain any remaining entries on shutdown. */
4397         while (handle_dumper_queue_entry (prof));
4398
4399         send_log_unsafe (FALSE);
4400         deinit_thread (thread);
4401
4402         mono_thread_info_detach ();
4403
4404         return NULL;
4405 }
4406
4407 static void
4408 start_dumper_thread (MonoProfiler* prof)
4409 {
4410         InterlockedWrite (&prof->run_dumper_thread, 1);
4411
4412         if (!mono_native_thread_create (&prof->dumper_thread, dumper_thread, prof)) {
4413                 fprintf (stderr, "Could not start dumper thread\n");
4414                 exit (1);
4415         }
4416 }
4417
4418 static void
4419 register_counter (const char *name, gint32 *counter)
4420 {
4421         mono_counters_register (name, MONO_COUNTER_UINT | MONO_COUNTER_PROFILER | MONO_COUNTER_MONOTONIC, counter);
4422 }
4423
4424 static void
4425 runtime_initialized (MonoProfiler *profiler)
4426 {
4427         InterlockedWrite (&runtime_inited, 1);
4428
4429         register_counter ("Sample events allocated", &sample_allocations_ctr);
4430         register_counter ("Log buffers allocated", &buffer_allocations_ctr);
4431
4432         register_counter ("Event: Sync points", &sync_points_ctr);
4433         register_counter ("Event: Heap objects", &heap_objects_ctr);
4434         register_counter ("Event: Heap starts", &heap_starts_ctr);
4435         register_counter ("Event: Heap ends", &heap_ends_ctr);
4436         register_counter ("Event: Heap roots", &heap_roots_ctr);
4437         register_counter ("Event: GC events", &gc_events_ctr);
4438         register_counter ("Event: GC resizes", &gc_resizes_ctr);
4439         register_counter ("Event: GC allocations", &gc_allocs_ctr);
4440         register_counter ("Event: GC moves", &gc_moves_ctr);
4441         register_counter ("Event: GC handle creations", &gc_handle_creations_ctr);
4442         register_counter ("Event: GC handle deletions", &gc_handle_deletions_ctr);
4443         register_counter ("Event: GC finalize starts", &finalize_begins_ctr);
4444         register_counter ("Event: GC finalize ends", &finalize_ends_ctr);
4445         register_counter ("Event: GC finalize object starts", &finalize_object_begins_ctr);
4446         register_counter ("Event: GC finalize object ends", &finalize_object_ends_ctr);
4447         register_counter ("Event: Image loads", &image_loads_ctr);
4448         register_counter ("Event: Image unloads", &image_unloads_ctr);
4449         register_counter ("Event: Assembly loads", &assembly_loads_ctr);
4450         register_counter ("Event: Assembly unloads", &assembly_unloads_ctr);
4451         register_counter ("Event: Class loads", &class_loads_ctr);
4452         register_counter ("Event: Class unloads", &class_unloads_ctr);
4453         register_counter ("Event: Method entries", &method_entries_ctr);
4454         register_counter ("Event: Method exits", &method_exits_ctr);
4455         register_counter ("Event: Method exception leaves", &method_exception_exits_ctr);
4456         register_counter ("Event: Method JITs", &method_jits_ctr);
4457         register_counter ("Event: Code buffers", &code_buffers_ctr);
4458         register_counter ("Event: Exception throws", &exception_throws_ctr);
4459         register_counter ("Event: Exception clauses", &exception_clauses_ctr);
4460         register_counter ("Event: Monitor events", &monitor_events_ctr);
4461         register_counter ("Event: Thread starts", &thread_starts_ctr);
4462         register_counter ("Event: Thread ends", &thread_ends_ctr);
4463         register_counter ("Event: Thread names", &thread_names_ctr);
4464         register_counter ("Event: Domain loads", &domain_loads_ctr);
4465         register_counter ("Event: Domain unloads", &domain_unloads_ctr);
4466         register_counter ("Event: Domain names", &domain_names_ctr);
4467         register_counter ("Event: Context loads", &context_loads_ctr);
4468         register_counter ("Event: Context unloads", &context_unloads_ctr);
4469         register_counter ("Event: Sample binaries", &sample_ubins_ctr);
4470         register_counter ("Event: Sample symbols", &sample_usyms_ctr);
4471         register_counter ("Event: Sample hits", &sample_hits_ctr);
4472         register_counter ("Event: Counter descriptors", &counter_descriptors_ctr);
4473         register_counter ("Event: Counter samples", &counter_samples_ctr);
4474         register_counter ("Event: Performance counter descriptors", &perfcounter_descriptors_ctr);
4475         register_counter ("Event: Performance counter samples", &perfcounter_samples_ctr);
4476         register_counter ("Event: Coverage methods", &coverage_methods_ctr);
4477         register_counter ("Event: Coverage statements", &coverage_statements_ctr);
4478         register_counter ("Event: Coverage classes", &coverage_classes_ctr);
4479         register_counter ("Event: Coverage assemblies", &coverage_assemblies_ctr);
4480
4481         counters_init (profiler);
4482
4483         /*
4484          * We must start the helper thread before the writer thread. This is
4485          * because the helper thread sets up the command port which is written to
4486          * the log header by the writer thread.
4487          */
4488         start_helper_thread (profiler);
4489         start_writer_thread (profiler);
4490         start_dumper_thread (profiler);
4491 }
4492
4493 static MonoProfiler*
4494 create_profiler (const char *args, const char *filename, GPtrArray *filters)
4495 {
4496         MonoProfiler *prof;
4497         char *nf;
4498         int force_delete = 0;
4499         prof = (MonoProfiler *) g_calloc (1, sizeof (MonoProfiler));
4500
4501         prof->args = pstrdup (args);
4502         prof->command_port = command_port;
4503         if (filename && *filename == '-') {
4504                 force_delete = 1;
4505                 filename++;
4506                 g_warning ("WARNING: the output:-FILENAME option is deprecated, the profiler now always overrides the output file\n");
4507         }
4508
4509         //If filename begin with +, append the pid at the end
4510         if (filename && *filename == '+')
4511                 filename = g_strdup_printf ("%s.%d", filename + 1, getpid ());
4512
4513
4514         if (!filename) {
4515                 if (do_report)
4516                         filename = "|mprof-report -";
4517                 else
4518                         filename = "output.mlpd";
4519                 nf = (char*)filename;
4520         } else {
4521                 nf = new_filename (filename);
4522                 if (do_report) {
4523                         int s = strlen (nf) + 32;
4524                         char *p = (char *) g_malloc (s);
4525                         snprintf (p, s, "|mprof-report '--out=%s' -", nf);
4526                         g_free (nf);
4527                         nf = p;
4528                 }
4529         }
4530         if (*nf == '|') {
4531                 prof->file = popen (nf + 1, "w");
4532                 prof->pipe_output = 1;
4533         } else if (*nf == '#') {
4534                 int fd = strtol (nf + 1, NULL, 10);
4535                 prof->file = fdopen (fd, "a");
4536         } else {
4537                 if (force_delete)
4538                         unlink (nf);
4539                 prof->file = fopen (nf, "wb");
4540         }
4541         if (!prof->file) {
4542                 fprintf (stderr, "Cannot create profiler output: %s\n", nf);
4543                 exit (1);
4544         }
4545
4546 #if defined (HAVE_SYS_ZLIB)
4547         if (use_zip)
4548                 prof->gzfile = gzdopen (fileno (prof->file), "wb");
4549 #endif
4550
4551         /*
4552          * If you hit this assert while increasing MAX_FRAMES, you need to increase
4553          * SAMPLE_BLOCK_SIZE as well.
4554          */
4555         g_assert (SAMPLE_SLOT_SIZE (MAX_FRAMES) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (SAMPLE_BLOCK_SIZE));
4556
4557         // FIXME: We should free this stuff too.
4558         mono_lock_free_allocator_init_size_class (&prof->sample_size_class, SAMPLE_SLOT_SIZE (num_frames), SAMPLE_BLOCK_SIZE);
4559         mono_lock_free_allocator_init_allocator (&prof->sample_allocator, &prof->sample_size_class, MONO_MEM_ACCOUNT_PROFILER);
4560
4561         mono_lock_free_queue_init (&prof->sample_reuse_queue);
4562
4563         g_assert (sizeof (WriterQueueEntry) * 2 < LOCK_FREE_ALLOC_SB_USABLE_SIZE (WRITER_ENTRY_BLOCK_SIZE));
4564
4565         // FIXME: We should free this stuff too.
4566         mono_lock_free_allocator_init_size_class (&prof->writer_entry_size_class, sizeof (WriterQueueEntry), WRITER_ENTRY_BLOCK_SIZE);
4567         mono_lock_free_allocator_init_allocator (&prof->writer_entry_allocator, &prof->writer_entry_size_class, MONO_MEM_ACCOUNT_PROFILER);
4568
4569         mono_lock_free_queue_init (&prof->writer_queue);
4570         mono_os_sem_init (&prof->writer_queue_sem, 0);
4571
4572         mono_lock_free_queue_init (&prof->dumper_queue);
4573         mono_os_sem_init (&prof->dumper_queue_sem, 0);
4574
4575         mono_os_mutex_init (&prof->method_table_mutex);
4576         prof->method_table = mono_conc_hashtable_new (NULL, NULL);
4577
4578         if (do_coverage)
4579                 coverage_init (prof);
4580         prof->coverage_filters = filters;
4581
4582         prof->startup_time = current_time ();
4583         return prof;
4584 }
4585
4586 /*
4587  * declaration to silence the compiler: this is the entry point that
4588  * mono will load from the shared library and call.
4589  */
4590 extern void
4591 mono_profiler_startup (const char *desc);
4592
4593 extern void
4594 mono_profiler_startup_log (const char *desc);
4595
4596 /*
4597  * this is the entry point that will be used when the profiler
4598  * is embedded inside the main executable.
4599  */
4600 void
4601 mono_profiler_startup_log (const char *desc)
4602 {
4603         mono_profiler_startup (desc);
4604 }
4605
4606 void
4607 mono_profiler_startup (const char *desc)
4608 {
4609         GPtrArray *filters = NULL;
4610         MonoProfiler *prof;
4611
4612         proflog_parse_args (&config, desc [3] == ':' ? desc + 4 : "");
4613
4614         //XXX maybe later cleanup to use config directly
4615         nocalls = !(config.effective_mask & PROFLOG_CALL_EVENTS);
4616         no_counters = !(config.effective_mask & PROFLOG_COUNTER_EVENTS);
4617         do_report = config.do_report;
4618         do_debug = config.do_debug;
4619         do_heap_shot = (config.effective_mask & PROFLOG_HEAPSHOT_FEATURE);
4620         hs_mode_ondemand = config.hs_mode_ondemand;
4621         hs_mode_ms = config.hs_mode_ms;
4622         hs_mode_gc = config.hs_mode_gc;
4623         do_mono_sample = (config.effective_mask & PROFLOG_SAMPLING_FEATURE);
4624         use_zip = config.use_zip;
4625         command_port = config.command_port;
4626         num_frames = config.num_frames;
4627         notraces = config.notraces;
4628         max_allocated_sample_hits = config.max_allocated_sample_hits;
4629         max_call_depth = config.max_call_depth;
4630         do_coverage = (config.effective_mask & PROFLOG_CODE_COV_FEATURE);
4631         debug_coverage = config.debug_coverage;
4632         only_coverage = config.only_coverage;
4633
4634         if (config.cov_filter_files) {
4635                 filters = g_ptr_array_new ();
4636                 int i;
4637                 for (i = 0; i < config.cov_filter_files->len; ++i) {
4638                         const char *name = config.cov_filter_files->pdata [i];
4639                         parse_cov_filter_file (filters, name);
4640                 }
4641         }
4642
4643         init_time ();
4644
4645         PROF_TLS_INIT ();
4646
4647         prof = create_profiler (desc, config.output_filename, filters);
4648         if (!prof) {
4649                 PROF_TLS_FREE ();
4650                 return;
4651         }
4652
4653         mono_lls_init (&profiler_thread_list, NULL);
4654
4655         init_thread (prof, TRUE);
4656
4657         //This two events are required for the profiler to work
4658         int events = MONO_PROFILE_THREADS | MONO_PROFILE_GC;
4659
4660         //Required callbacks
4661         mono_profiler_install (prof, log_shutdown);
4662         mono_profiler_install_runtime_initialized (runtime_initialized);
4663
4664         mono_profiler_install_gc (gc_event, gc_resize);
4665         mono_profiler_install_thread (thread_start, thread_end);
4666
4667         //It's questionable whether we actually want this to be mandatory, maybe put it behind the actual event?
4668         mono_profiler_install_thread_name (thread_name);
4669
4670
4671         if (config.effective_mask & PROFLOG_DOMAIN_EVENTS) {
4672                 events |= MONO_PROFILE_APPDOMAIN_EVENTS;
4673                 mono_profiler_install_appdomain (NULL, domain_loaded, domain_unloaded, NULL);
4674                 mono_profiler_install_appdomain_name (domain_name);
4675         }
4676
4677         if (config.effective_mask & PROFLOG_ASSEMBLY_EVENTS) {
4678                 events |= MONO_PROFILE_ASSEMBLY_EVENTS;
4679                 mono_profiler_install_assembly (NULL, assembly_loaded, assembly_unloaded, NULL);
4680         }
4681
4682         if (config.effective_mask & PROFLOG_MODULE_EVENTS) {
4683                 events |= MONO_PROFILE_MODULE_EVENTS;
4684                 mono_profiler_install_module (NULL, image_loaded, image_unloaded, NULL);
4685         }
4686
4687         if (config.effective_mask & PROFLOG_CLASS_EVENTS) {
4688                 events |= MONO_PROFILE_CLASS_EVENTS;
4689                 mono_profiler_install_class (NULL, class_loaded, class_unloaded, NULL);
4690         }
4691
4692         if (config.effective_mask & PROFLOG_JIT_COMPILATION_EVENTS) {
4693                 events |= MONO_PROFILE_JIT_COMPILATION;
4694                 mono_profiler_install_jit_end (method_jitted);
4695                 mono_profiler_install_code_buffer_new (code_buffer_new);
4696         }
4697
4698         if (config.effective_mask & PROFLOG_EXCEPTION_EVENTS) {
4699                 events |= MONO_PROFILE_EXCEPTIONS;
4700                 mono_profiler_install_exception (throw_exc, method_exc_leave, clause_exc);
4701         }
4702
4703         if (config.effective_mask & PROFLOG_ALLOCATION_EVENTS) {
4704                 events |= MONO_PROFILE_ALLOCATIONS;
4705                 mono_profiler_install_allocation (gc_alloc);
4706         }
4707
4708         //PROFLOG_GC_EVENTS is mandatory
4709         //PROFLOG_THREAD_EVENTS is mandatory
4710
4711         if (config.effective_mask & PROFLOG_CALL_EVENTS) {
4712                 events |= MONO_PROFILE_ENTER_LEAVE;
4713                 mono_profiler_install_enter_leave (method_enter, method_leave);
4714         }
4715
4716         if (config.effective_mask & PROFLOG_INS_COVERAGE_EVENTS) {
4717                 events |= MONO_PROFILE_INS_COVERAGE;
4718                 mono_profiler_install_coverage_filter (coverage_filter);
4719         }
4720
4721         //XXX should we check for PROFLOG_SAMPLING_FEATURE instead??
4722         if (config.effective_mask & PROFLOG_SAMPLING_EVENTS) {
4723                 events |= MONO_PROFILE_STATISTICAL;
4724                 mono_profiler_set_statistical_mode (config.sampling_mode, config.sample_freq);
4725                 mono_profiler_install_statistical (mono_sample_hit);
4726         }
4727
4728         if (config.effective_mask & PROFLOG_MONITOR_EVENTS) {
4729                 events |= MONO_PROFILE_MONITOR_EVENTS;
4730                 mono_profiler_install_monitor (monitor_event);
4731         }
4732
4733         if (config.effective_mask & PROFLOG_GC_MOVES_EVENTS) {
4734                 events |= MONO_PROFILE_GC_MOVES;
4735                 mono_profiler_install_gc_moves (gc_moves);
4736         }
4737
4738         // TODO split those in two profiler events
4739         if (config.effective_mask & (PROFLOG_GC_ROOT_EVENTS | PROFLOG_GC_HANDLE_EVENTS)) {
4740                 events |= MONO_PROFILE_GC_ROOTS;
4741                 mono_profiler_install_gc_roots (
4742                         config.effective_mask & (PROFLOG_GC_HANDLE_EVENTS) ? gc_handle : NULL,
4743                         (config.effective_mask & PROFLOG_GC_ROOT_EVENTS) ? gc_roots : NULL);
4744         }
4745
4746         if (config.effective_mask & PROFLOG_CONTEXT_EVENTS) {
4747                 events |= MONO_PROFILE_CONTEXT_EVENTS;
4748                 mono_profiler_install_context (context_loaded, context_unloaded);
4749         }
4750
4751         if (config.effective_mask & PROFLOG_FINALIZATION_EVENTS) {
4752                 events |= MONO_PROFILE_GC_FINALIZATION;
4753                 mono_profiler_install_gc_finalize (finalize_begin, finalize_object_begin, finalize_object_end, finalize_end);
4754         } else if (ENABLED (PROFLOG_HEAPSHOT_FEATURE) && config.hs_mode_ondemand) {
4755                 //On Demand heapshot uses the finalizer thread to force a collection and thus a heapshot
4756                 events |= MONO_PROFILE_GC_FINALIZATION;
4757                 mono_profiler_install_gc_finalize (NULL, NULL, NULL, finalize_end);
4758         }
4759
4760         //PROFLOG_COUNTER_EVENTS is a pseudo event controled by the no_counters global var
4761         //PROFLOG_GC_HANDLE_EVENTS is handled together with PROFLOG_GC_ROOT_EVENTS
4762
4763         mono_profiler_set_events ((MonoProfileFlags)events);
4764 }