mono/metadata/debug-mono-symfile.c

   1 /*
   2  * debug-mono-symfile.c:
   3  *
   4  * Author:
   5  *      Mono Project (http://www.mono-project.com)
   6  *
   7  * Copyright (C) 2005-2008 Novell, Inc. (http://www.novell.com)
   8  * Copyright 2012 Xamarin Inc (http://www.xamarin.com)
   9  */
  10
  11 #include <config.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <errno.h>
  15 #include <string.h>
  16 #ifdef HAVE_SYS_PARAM_H
  17 #include <sys/param.h>
  18 #endif
  19 #include <sys/stat.h>
  20 #include <mono/metadata/metadata.h>
  21 #include <mono/metadata/tabledefs.h>
  22 #include <mono/metadata/tokentype.h>
  23 #include <mono/metadata/appdomain.h>
  24 #include <mono/metadata/exception.h>
  25 #include <mono/metadata/debug-helpers.h>
  26 #include <mono/metadata/mono-debug.h>
  27 #include <mono/metadata/debug-mono-symfile.h>
  28 #include <mono/metadata/mono-debug-debugger.h>
  29 #include <mono/metadata/mono-endian.h>
  30 #include <mono/metadata/metadata-internals.h>
  31 #include <mono/metadata/class-internals.h>
  32 #include <mono/utils/mono-mmap.h>
  33 #include <mono/utils/bsearch.h>
  34
  35 #include <fcntl.h>
  36 #ifdef HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 #define RANGE_TABLE_CHUNK_SIZE          256
  41 #define CLASS_TABLE_CHUNK_SIZE          256
  42 #define TYPE_TABLE_PTR_CHUNK_SIZE       256
  43 #define TYPE_TABLE_CHUNK_SIZE           65536
  44
  45 struct _MonoSymbolFile {
  46         const uint8_t *raw_contents;
  47         int raw_contents_size;
  48         void *raw_contents_handle;
  49         int major_version;
  50         int minor_version;
  51         char *filename;
  52         GHashTable *method_hash;
  53         GHashTable *source_hash;
  54         MonoSymbolFileOffsetTable *offset_table;
  55         gboolean was_loaded_from_memory;
  56 };
  57
  58 static void
  59 free_method_info (MonoDebugMethodInfo *minfo)
  60 {
  61         g_free (minfo);
  62 }
  63
  64 static void
  65 free_source_info (MonoDebugSourceInfo *sinfo)
  66 {
  67         g_free (sinfo->source_file);
  68         g_free (sinfo->guid);
  69         g_free (sinfo->hash);
  70         g_free (sinfo);
  71 }
  72
  73 static int
  74 load_symfile (MonoDebugHandle *handle, MonoSymbolFile *symfile, mono_bool in_the_debugger)
  75 {
  76         const char *ptr, *start;
  77         gchar *guid;
  78         uint64_t magic;
  79         int minor, major;
  80
  81         ptr = start = (const char*)symfile->raw_contents;
  82         if (!ptr)
  83                 return FALSE;
  84
  85         magic = read64(ptr);
  86         ptr += sizeof(uint64_t);
  87         if (magic != MONO_SYMBOL_FILE_MAGIC) {
  88                 if (!in_the_debugger)
  89                         g_warning ("Symbol file %s is not a mono symbol file", symfile->filename);
  90                 return FALSE;
  91         }
  92
  93         major = read32(ptr);
  94         ptr += sizeof(uint32_t);
  95         minor = read32(ptr);
  96         ptr += sizeof(uint32_t);
  97
  98         /*
  99          * 50.0 is the frozen version for Mono 2.0.
 100          *
 101          * Nobody except me (Martin) is allowed to check the minor version.
 102          */
 103         if (major != MONO_SYMBOL_FILE_MAJOR_VERSION) {
 104                 if (!in_the_debugger)
 105                         g_warning ("Symbol file %s has incorrect version (expected %d.%d, got %d)",
 106                                    symfile->filename, MONO_SYMBOL_FILE_MAJOR_VERSION,
 107                                    MONO_SYMBOL_FILE_MINOR_VERSION, major);
 108                 return FALSE;
 109         }
 110
 111         guid = mono_guid_to_string ((const uint8_t *) ptr);
 112         ptr += 16;
 113
 114         if (strcmp (handle->image->guid, guid)) {
 115                 if (!in_the_debugger)
 116                         g_warning ("Symbol file %s doesn't match image %s", symfile->filename,
 117                                    handle->image->name);
 118                 if (guid)
 119                         g_free (guid);
 120                 return FALSE;
 121         }
 122
 123         symfile->major_version = major;
 124         symfile->minor_version = minor;
 125
 126         symfile->offset_table = (MonoSymbolFileOffsetTable *) ptr;
 127
 128         symfile->method_hash = g_hash_table_new_full (
 129                 NULL, NULL, NULL, (GDestroyNotify) free_method_info);
 130
 131         symfile->source_hash = g_hash_table_new_full (
 132                 NULL, NULL, NULL, (GDestroyNotify) free_source_info);
 133
 134         g_free (guid);
 135         return TRUE;
 136 }
 137
 138 MonoSymbolFile *
 139 mono_debug_open_mono_symbols (MonoDebugHandle *handle, const uint8_t *raw_contents,
 140                               int size, gboolean in_the_debugger)
 141 {
 142         MonoSymbolFile *symfile;
 143
 144         mono_debugger_lock ();
 145         symfile = g_new0 (MonoSymbolFile, 1);
 146
 147         if (raw_contents != NULL) {
 148                 unsigned char *p;
 149                 symfile->raw_contents_size = size;
 150                 symfile->raw_contents = p = (unsigned char *)g_malloc (size);
 151                 memcpy (p, raw_contents, size);
 152                 symfile->filename = g_strdup_printf ("LoadedFromMemory");
 153                 symfile->was_loaded_from_memory = TRUE;
 154         } else {
 155                 MonoFileMap *f;
 156
 157                 symfile->filename = g_strdup_printf ("%s.mdb", mono_image_get_filename (handle->image));
 158                 symfile->was_loaded_from_memory = FALSE;
 159                 if ((f = mono_file_map_open (symfile->filename))) {
 160                         symfile->raw_contents_size = mono_file_map_size (f);
 161                         if (symfile->raw_contents_size == 0) {
 162                                 if (!in_the_debugger)
 163                                         g_warning ("stat of %s failed: %s",
 164                                                    symfile->filename,  g_strerror (errno));
 165                         } else {
 166                                 symfile->raw_contents = (const unsigned char *)mono_file_map (symfile->raw_contents_size, MONO_MMAP_READ|MONO_MMAP_PRIVATE, mono_file_map_fd (f), 0, &symfile->raw_contents_handle);
 167                         }
 168
 169                         mono_file_map_close (f);
 170                 }
 171         }
 172
 173         if (load_symfile (handle, symfile, in_the_debugger)) {
 174                 mono_debugger_unlock ();
 175                 return symfile;
 176         } else if (!in_the_debugger) {
 177                 mono_debug_close_mono_symbol_file (symfile);
 178                 mono_debugger_unlock ();
 179                 return NULL;
 180         }
 181
 182         mono_debugger_unlock ();
 183         return symfile;
 184 }
 185
 186 void
 187 mono_debug_close_mono_symbol_file (MonoSymbolFile *symfile)
 188 {
 189         if (!symfile)
 190                 return;
 191
 192         mono_debugger_lock ();
 193         if (symfile->method_hash)
 194                 g_hash_table_destroy (symfile->method_hash);
 195
 196         if (symfile->raw_contents) {
 197                 if (symfile->was_loaded_from_memory)
 198                         g_free ((gpointer)symfile->raw_contents);
 199                 else
 200                         mono_file_unmap ((gpointer) symfile->raw_contents, symfile->raw_contents_handle);
 201         }
 202
 203         if (symfile->filename)
 204                 g_free (symfile->filename);
 205         g_free (symfile);
 206         mono_debugger_unlock ();
 207 }
 208
 209 mono_bool
 210 mono_debug_symfile_is_loaded (MonoSymbolFile *symfile)
 211 {
 212         return symfile && symfile->offset_table;
 213 }
 214
 215
 216 static int
 217 read_leb128 (const uint8_t *ptr, const uint8_t **rptr)
 218 {
 219         int ret = 0;
 220         int shift = 0;
 221         char b;
 222
 223         do {
 224                 b = *ptr++;
 225
 226                 ret = ret | ((b & 0x7f) << shift);
 227                 shift += 7;
 228         } while ((b & 0x80) == 0x80);
 229
 230         if (rptr)
 231                 *rptr = ptr;
 232
 233         return ret;
 234 }
 235
 236 static gchar *
 237 read_string (const uint8_t *ptr, const uint8_t **endp)
 238 {
 239         gchar *s;
 240         int len = read_leb128 (ptr, &ptr);
 241
 242         s = g_filename_from_utf8 ((const char *) ptr, len, NULL, NULL, NULL);
 243         ptr += len;
 244         if (endp)
 245                 *endp = ptr;
 246         return s;
 247 }
 248
 249 typedef struct {
 250         MonoSymbolFile *symfile;
 251         int line_base, line_range, max_address_incr;
 252         uint8_t opcode_base;
 253         uint32_t last_line, last_file, last_offset;
 254         uint32_t first_file;
 255         int line, file, offset;
 256         gboolean is_hidden;
 257 } StatementMachine;
 258
 259 static gboolean
 260 check_line (StatementMachine *stm, int offset, MonoDebugSourceLocation **location)
 261 {
 262         gchar *source_file = NULL;
 263
 264         if (stm->offset <= offset) {
 265                 stm->last_offset = stm->offset;
 266                 stm->last_file = stm->file;
 267                 if (stm->line != 0xfeefee)
 268                         stm->last_line = stm->line;
 269                 return FALSE;
 270         }
 271
 272         if (stm->last_file) {
 273                 int offset = read32(&(stm->symfile->offset_table->_source_table_offset)) +
 274                         (stm->last_file - 1) * sizeof (MonoSymbolFileSourceEntry);
 275                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 276                         (stm->symfile->raw_contents + offset);
 277
 278                 source_file = read_string (stm->symfile->raw_contents + read32(&(se->_data_offset)), NULL);
 279         }
 280
 281         if (stm->last_line == 0) {
 282                 /*
 283                  * The IL offset is less than the first IL offset which has a corresponding
 284                  * source line.
 285                  */
 286                 *location = NULL;
 287                 return TRUE;
 288         }
 289
 290         *location = g_new0 (MonoDebugSourceLocation, 1);
 291         (*location)->source_file = source_file;
 292         (*location)->row = stm->last_line;
 293         (*location)->il_offset = stm->last_offset;
 294         return TRUE;
 295 }
 296
 297 /**
 298  * mono_debug_symfile_lookup_location:
 299  * @minfo: A `MonoDebugMethodInfo' which can be retrieved by
 300  *         mono_debug_lookup_method().
 301  * @offset: IL offset within the corresponding method's CIL code.
 302  *
 303  * This function is similar to mono_debug_lookup_location(), but we
 304  * already looked up the method and also already did the
 305  * `native address -> IL offset' mapping.
 306  */
 307 MonoDebugSourceLocation *
 308 mono_debug_symfile_lookup_location (MonoDebugMethodInfo *minfo, uint32_t offset)
 309 {
 310         MonoDebugSourceLocation *location = NULL;
 311         MonoSymbolFile *symfile;
 312         const unsigned char *ptr;
 313         StatementMachine stm;
 314
 315 #define DW_LNS_copy 1
 316 #define DW_LNS_advance_pc 2
 317 #define DW_LNS_advance_line 3
 318 #define DW_LNS_set_file 4
 319 #define DW_LNS_const_add_pc 8
 320
 321 #define DW_LNE_end_sequence 1
 322 #define DW_LNE_MONO_negate_is_hidden 0x40
 323
 324 #define DW_LNE_MONO__extensions_start 0x40
 325 #define DW_LNE_MONO__extensions_end 0x7f
 326
 327         if ((symfile = minfo->handle->symfile) == NULL)
 328                 return NULL;
 329
 330         stm.line_base = read32 (&symfile->offset_table->_line_number_table_line_base);
 331         stm.line_range = read32 (&symfile->offset_table->_line_number_table_line_range);
 332         stm.opcode_base = (uint8_t) read32 (&symfile->offset_table->_line_number_table_opcode_base);
 333         stm.max_address_incr = (255 - stm.opcode_base) / stm.line_range;
 334
 335         mono_debugger_lock ();
 336
 337         ptr = symfile->raw_contents + minfo->lnt_offset;
 338
 339         stm.symfile = symfile;
 340         stm.offset = stm.last_offset = 0;
 341         stm.last_file = 0;
 342         stm.last_line = 0;
 343         stm.first_file = 0;
 344         stm.file = 1;
 345         stm.line = 1;
 346         stm.is_hidden = FALSE;
 347
 348         while (TRUE) {
 349                 uint8_t opcode = *ptr++;
 350
 351                 if (opcode == 0) {
 352                         uint8_t size = *ptr++;
 353                         const unsigned char *end_ptr = ptr + size;
 354
 355                         opcode = *ptr++;
 356
 357                         if (opcode == DW_LNE_end_sequence) {
 358                                 if (check_line (&stm, -1, &location))
 359                                         goto out_success;
 360                                 break;
 361                         } else if (opcode == DW_LNE_MONO_negate_is_hidden) {
 362                                 stm.is_hidden = !stm.is_hidden;
 363                         } else if ((opcode >= DW_LNE_MONO__extensions_start) &&
 364                                    (opcode <= DW_LNE_MONO__extensions_end)) {
 365                                 ; // reserved for future extensions
 366                         } else {
 367                                 g_warning ("Unknown extended opcode %x in LNT", opcode);
 368                         }
 369
 370                         ptr = end_ptr;
 371                         continue;
 372                 } else if (opcode < stm.opcode_base) {
 373                         switch (opcode) {
 374                         case DW_LNS_copy:
 375                                 if (check_line (&stm, offset, &location))
 376                                         goto out_success;
 377                                 break;
 378                         case DW_LNS_advance_pc:
 379                                 stm.offset += read_leb128 (ptr, &ptr);
 380                                 break;
 381                         case DW_LNS_advance_line:
 382                                 stm.line += read_leb128 (ptr, &ptr);
 383                                 break;
 384                         case DW_LNS_set_file:
 385                                 stm.file = read_leb128 (ptr, &ptr);
 386                                 break;
 387                         case DW_LNS_const_add_pc:
 388                                 stm.offset += stm.max_address_incr;
 389                                 break;
 390                         default:
 391                                 g_warning ("Unknown standard opcode %x in LNT", opcode);
 392                                 goto error_out;
 393                         }
 394                 } else {
 395                         opcode -= stm.opcode_base;
 396
 397                         stm.offset += opcode / stm.line_range;
 398                         stm.line += stm.line_base + (opcode % stm.line_range);
 399
 400                         if (check_line (&stm, offset, &location))
 401                                 goto out_success;
 402                 }
 403         }
 404
 405  error_out:
 406         mono_debugger_unlock ();
 407         return NULL;
 408
 409  out_success:
 410         mono_debugger_unlock ();
 411         return location;
 412 }
 413
 414 static void
 415 add_line (StatementMachine *stm, GPtrArray *il_offset_array, GPtrArray *line_number_array, GPtrArray *source_file_array, GPtrArray *hidden_array)
 416 {
 417         g_ptr_array_add (il_offset_array, GUINT_TO_POINTER (stm->offset));
 418         g_ptr_array_add (line_number_array, GUINT_TO_POINTER (stm->line));
 419         g_ptr_array_add (source_file_array, GUINT_TO_POINTER (stm->file));
 420         g_ptr_array_add (hidden_array, GUINT_TO_POINTER (stm->is_hidden || stm->line <= 0));
 421
 422         if (!stm->is_hidden && !stm->first_file)
 423                 stm->first_file = stm->file;
 424 }
 425
 426 /*
 427  * mono_debug_symfile_free_location:
 428  *
 429  *   Free a MonoDebugSourceLocation returned by
 430  *   mono_debug_symfile_lookup_location
 431  */
 432 void
 433 mono_debug_symfile_free_location   (MonoDebugSourceLocation  *location)
 434 {
 435         g_free (location->source_file);
 436         g_free (location);
 437 }
 438
 439 /*
 440  * LOCKING: Assumes the debugger lock is held.
 441  */
 442 static MonoDebugSourceInfo*
 443 get_source_info (MonoSymbolFile *symfile, int index)
 444 {
 445         MonoDebugSourceInfo *info;
 446
 447         info = (MonoDebugSourceInfo *)g_hash_table_lookup (symfile->source_hash, GUINT_TO_POINTER (index));
 448         if (!info) {
 449                 int offset = read32(&(symfile->offset_table->_source_table_offset)) +
 450                         (index - 1) * sizeof (MonoSymbolFileSourceEntry);
 451                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 452                         (symfile->raw_contents + offset);
 453                 const uint8_t *ptr = symfile->raw_contents + read32(&(se->_data_offset));
 454
 455                 info = g_new0 (MonoDebugSourceInfo, 1);
 456                 info->source_file = read_string (ptr, &ptr);
 457                 info->guid = (guint8 *)g_malloc0 (16);
 458                 memcpy (info->guid, ptr, 16);
 459                 ptr += 16;
 460                 info->hash = (guint8 *)g_malloc0 (16);
 461                 memcpy (info->hash, ptr, 16);
 462                 ptr += 16;
 463                 g_hash_table_insert (symfile->source_hash, GUINT_TO_POINTER (index), info);
 464         }
 465         return info;
 466 }
 467
 468 typedef enum {
 469         LNT_FLAG_HAS_COLUMN_INFO = 1 << 1,
 470         LNT_FLAG_HAS_END_INFO = 1 << 2,
 471 } LineNumberTableFlags;
 472
 473 static LineNumberTableFlags
 474 method_get_lnt_flags (MonoDebugMethodInfo *minfo)
 475 {
 476         MonoSymbolFile *symfile;
 477         const unsigned char *ptr;
 478         guint32 flags;
 479
 480         if ((symfile = minfo->handle->symfile) == NULL)
 481                 return (LineNumberTableFlags)0;
 482
 483         ptr = symfile->raw_contents + minfo->data_offset;
 484
 485         /* Has to read 'flags' which is preceeded by a bunch of other data */
 486         /* compile_unit_index */
 487         read_leb128 (ptr, &ptr);
 488         /* local variable table offset */
 489         read_leb128 (ptr, &ptr);
 490         /* namespace id */
 491         read_leb128 (ptr, &ptr);
 492         /* code block table offset */
 493         read_leb128 (ptr, &ptr);
 494         /* scope variable table offset */
 495         read_leb128 (ptr, &ptr);
 496         /* real name offset */
 497         read_leb128 (ptr, &ptr);
 498
 499         flags = read_leb128 (ptr, &ptr);
 500         return (LineNumberTableFlags)flags;
 501 }
 502
 503 /*
 504  * mono_debug_symfile_get_seq_points:
 505  *
 506  * On return, SOURCE_FILE_LIST will point to a GPtrArray of MonoDebugSourceFile
 507  * structures, and SOURCE_FILES will contain indexes into this array.
 508  * The MonoDebugSourceFile structures are owned by this module.
 509  */
 510 void
 511 mono_debug_symfile_get_seq_points (MonoDebugMethodInfo *minfo, char **source_file, GPtrArray **source_file_list, int **source_files, MonoSymSeqPoint **seq_points, int *n_seq_points)
 512 {
 513         // FIXME: Unify this with mono_debug_symfile_lookup_location
 514         MonoSymbolFile *symfile;
 515         const unsigned char *ptr;
 516         StatementMachine stm;
 517         uint32_t i, j, n;
 518         LineNumberTableFlags flags;
 519         GPtrArray *il_offset_array, *line_number_array, *source_file_array, *hidden_array;
 520         gboolean has_column_info, has_end_info;
 521         MonoSymSeqPoint *sps;
 522
 523         if (source_file_list)
 524                 *source_file_list = NULL;
 525         if (seq_points)
 526                 *seq_points = NULL;
 527         if (n_seq_points)
 528                 *n_seq_points = 0;
 529         if (source_files)
 530                 *source_files = NULL;
 531         if (source_file)
 532                 *source_file = NULL;
 533
 534         if ((symfile = minfo->handle->symfile) == NULL)
 535                 return;
 536
 537         flags = method_get_lnt_flags (minfo);
 538         has_column_info = (flags & LNT_FLAG_HAS_COLUMN_INFO) > 0;
 539         has_end_info = (flags & LNT_FLAG_HAS_END_INFO) > 0;
 540
 541         il_offset_array = g_ptr_array_new ();
 542         line_number_array = g_ptr_array_new ();
 543         source_file_array = g_ptr_array_new ();
 544         hidden_array = g_ptr_array_new();
 545
 546         stm.line_base = read32 (&symfile->offset_table->_line_number_table_line_base);
 547         stm.line_range = read32 (&symfile->offset_table->_line_number_table_line_range);
 548         stm.opcode_base = (uint8_t) read32 (&symfile->offset_table->_line_number_table_opcode_base);
 549         stm.max_address_incr = (255 - stm.opcode_base) / stm.line_range;
 550
 551         mono_debugger_lock ();
 552
 553         ptr = symfile->raw_contents + minfo->lnt_offset;
 554
 555         stm.symfile = symfile;
 556         stm.offset = stm.last_offset = 0;
 557         stm.last_file = 0;
 558         stm.last_line = 0;
 559         stm.first_file = 0;
 560         stm.file = 1;
 561         stm.line = 1;
 562         stm.is_hidden = FALSE;
 563
 564         while (TRUE) {
 565                 uint8_t opcode = *ptr++;
 566
 567                 if (opcode == 0) {
 568                         uint8_t size = *ptr++;
 569                         const unsigned char *end_ptr = ptr + size;
 570
 571                         opcode = *ptr++;
 572
 573                         if (opcode == DW_LNE_end_sequence) {
 574                                 if (il_offset_array->len == 0)
 575                                         /* Empty table */
 576                                         break;
 577                                 break;
 578                         } else if (opcode == DW_LNE_MONO_negate_is_hidden) {
 579                                 stm.is_hidden = !stm.is_hidden;
 580                         } else if ((opcode >= DW_LNE_MONO__extensions_start) &&
 581                                    (opcode <= DW_LNE_MONO__extensions_end)) {
 582                                 ; // reserved for future extensions
 583                         } else {
 584                                 g_warning ("Unknown extended opcode %x in LNT", opcode);
 585                         }
 586
 587                         ptr = end_ptr;
 588                         continue;
 589                 } else if (opcode < stm.opcode_base) {
 590                         switch (opcode) {
 591                         case DW_LNS_copy:
 592                                 add_line (&stm, il_offset_array, line_number_array, source_file_array, hidden_array);
 593                                 break;
 594                         case DW_LNS_advance_pc:
 595                                 stm.offset += read_leb128 (ptr, &ptr);
 596                                 break;
 597                         case DW_LNS_advance_line:
 598                                 stm.line += read_leb128 (ptr, &ptr);
 599                                 break;
 600                         case DW_LNS_set_file:
 601                                 stm.file = read_leb128 (ptr, &ptr);
 602                                 break;
 603                         case DW_LNS_const_add_pc:
 604                                 stm.offset += stm.max_address_incr;
 605                                 break;
 606                         default:
 607                                 g_warning ("Unknown standard opcode %x in LNT", opcode);
 608                                 g_assert_not_reached ();
 609                         }
 610                 } else {
 611                         opcode -= stm.opcode_base;
 612
 613                         stm.offset += opcode / stm.line_range;
 614                         stm.line += stm.line_base + (opcode % stm.line_range);
 615
 616                         add_line (&stm, il_offset_array, line_number_array, source_file_array, hidden_array);
 617                 }
 618         }
 619
 620         if (!stm.file && stm.first_file)
 621                 stm.file = stm.first_file;
 622
 623         if (stm.file && source_file) {
 624                 int offset = read32(&(stm.symfile->offset_table->_source_table_offset)) +
 625                         (stm.file - 1) * sizeof (MonoSymbolFileSourceEntry);
 626                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 627                         (stm.symfile->raw_contents + offset);
 628
 629                 if (source_file)
 630                         *source_file = read_string (stm.symfile->raw_contents + read32(&(se->_data_offset)), NULL);
 631         }
 632
 633         if (source_file_list) {
 634                 int file, last_file = 0;
 635
 636                 *source_file_list = g_ptr_array_new ();
 637                 if (source_files)
 638                         *source_files = (int *)g_malloc (il_offset_array->len * sizeof (int));
 639
 640                 for (i = 0; i < il_offset_array->len; ++i) {
 641                         file = GPOINTER_TO_UINT (g_ptr_array_index (source_file_array, i));
 642                         if (file && file != last_file) {
 643                                 MonoDebugSourceInfo *info = get_source_info (symfile, file);
 644
 645                                 g_ptr_array_add (*source_file_list, info);
 646                         }
 647                         last_file = file;
 648                         if (source_files)
 649                                 (*source_files) [i] = (*source_file_list)->len - 1;
 650                 }
 651                 if ((*source_file_list)->len == 0 && stm.file) {
 652                         MonoDebugSourceInfo *info = get_source_info (symfile, stm.file);
 653
 654                         g_ptr_array_add (*source_file_list, info);
 655                 }
 656         }
 657
 658         if (n_seq_points) {
 659                 g_assert (seq_points);
 660
 661                 n = il_offset_array->len;
 662                 for (i = 0; i < il_offset_array->len; i++) {
 663                         if (GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 664                                 n --;
 665                         }
 666                 }
 667
 668                 *n_seq_points = n;
 669                 *seq_points = sps = g_new0 (MonoSymSeqPoint, n);
 670                 j = 0;
 671                 for (i = 0; i < il_offset_array->len; ++i) {
 672                         MonoSymSeqPoint *sp = &(sps [j]);
 673                         if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 674                                 sp->il_offset = GPOINTER_TO_UINT (g_ptr_array_index (il_offset_array, i));
 675                                 sp->line = GPOINTER_TO_UINT (g_ptr_array_index (line_number_array, i));
 676                                 sp->column = -1;
 677                                 sp->end_line = -1;
 678                                 sp->end_column = -1;
 679                                 j ++;
 680                         }
 681                 }
 682
 683                 if (has_column_info) {
 684                         j = 0;
 685                         for (i = 0; i < il_offset_array->len; ++i) {
 686                                 MonoSymSeqPoint *sp = &(sps [j]);
 687                                 int column = read_leb128 (ptr, &ptr);
 688                                 if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 689                                         sp->column = column;
 690                                         j++;
 691                                 }
 692                         }
 693                 }
 694
 695                 if (has_end_info) {
 696                         j = 0;
 697                         for (i = 0; i < il_offset_array->len; ++i) {
 698                                 MonoSymSeqPoint *sp = &(sps [j]);
 699                                 int end_row, end_column = -1;
 700
 701                                 end_row = read_leb128 (ptr, &ptr);
 702                                 if (end_row != 0xffffff) {
 703                                         end_row += GPOINTER_TO_UINT (g_ptr_array_index (line_number_array, i));
 704                                         end_column = read_leb128 (ptr, &ptr);
 705                                         if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 706                                                 sp->end_line = end_row;
 707                                                 sp->end_column = end_column;
 708                                                 j++;
 709                                         }
 710                                 }
 711                         }
 712                 }
 713         }
 714
 715         g_ptr_array_free (il_offset_array, TRUE);
 716         g_ptr_array_free (line_number_array, TRUE);
 717         g_ptr_array_free (hidden_array, TRUE);
 718
 719         mono_debugger_unlock ();
 720         return;
 721 }
 722
 723 static int
 724 compare_method (const void *key, const void *object)
 725 {
 726         uint32_t token = GPOINTER_TO_UINT (key);
 727         MonoSymbolFileMethodEntry *me = (MonoSymbolFileMethodEntry*)object;
 728
 729         return token - read32(&(me->_token));
 730 }
 731
 732 MonoDebugMethodInfo *
 733 mono_debug_symfile_lookup_method (MonoDebugHandle *handle, MonoMethod *method)
 734 {
 735         MonoSymbolFileMethodEntry *first_ie, *ie;
 736         MonoDebugMethodInfo *minfo;
 737         MonoSymbolFile *symfile = handle->symfile;
 738
 739         if (!symfile->method_hash)
 740                 return NULL;
 741
 742         if (handle->image != mono_class_get_image (mono_method_get_class (method)))
 743                 return NULL;
 744
 745         mono_debugger_lock ();
 746
 747         minfo = (MonoDebugMethodInfo *)g_hash_table_lookup (symfile->method_hash, method);
 748         if (minfo) {
 749                 mono_debugger_unlock ();
 750                 return minfo;
 751         }
 752
 753         first_ie = (MonoSymbolFileMethodEntry *)
 754                 (symfile->raw_contents + read32(&(symfile->offset_table->_method_table_offset)));
 755
 756         ie = (MonoSymbolFileMethodEntry *)mono_binary_search (GUINT_TO_POINTER (mono_method_get_token (method)), first_ie,
 757                                    read32(&(symfile->offset_table->_method_count)),
 758                                    sizeof (MonoSymbolFileMethodEntry), compare_method);
 759
 760         if (!ie) {
 761                 mono_debugger_unlock ();
 762                 return NULL;
 763         }
 764
 765         minfo = g_new0 (MonoDebugMethodInfo, 1);
 766         minfo->index = (ie - first_ie) + 1;
 767         minfo->method = method;
 768         minfo->handle = handle;
 769
 770         minfo->data_offset = read32 (&(ie->_data_offset));
 771         minfo->lnt_offset = read32 (&(ie->_line_number_table));
 772
 773         g_hash_table_insert (symfile->method_hash, method, minfo);
 774
 775         mono_debugger_unlock ();
 776         return minfo;
 777 }
 778
 779 /*
 780  * mono_debug_symfile_lookup_locals:
 781  *
 782  *   Return information about the local variables of MINFO from the symbol file.
 783  * Return NULL if no information can be found.
 784  * The result should be freed using mono_debug_symfile_free_locals ().
 785  */
 786 MonoDebugLocalsInfo*
 787 mono_debug_symfile_lookup_locals (MonoDebugMethodInfo *minfo)
 788 {
 789         MonoSymbolFile *symfile = minfo->handle->symfile;
 790         const uint8_t *p;
 791         int i, len, locals_offset, num_locals, block_index;
 792         int code_block_table_offset;
 793         MonoDebugLocalsInfo *res;
 794
 795         if (!symfile)
 796                 return NULL;
 797
 798         p = symfile->raw_contents + minfo->data_offset;
 799
 800         /* compile_unit_index = */ read_leb128 (p, &p);
 801         locals_offset = read_leb128 (p, &p);
 802         /* namespace_id = */ read_leb128 (p, &p);
 803         code_block_table_offset = read_leb128 (p, &p);
 804
 805         res = g_new0 (MonoDebugLocalsInfo, 1);
 806
 807         p = symfile->raw_contents + code_block_table_offset;
 808         res->num_blocks = read_leb128 (p, &p);
 809         res->code_blocks = g_new0 (MonoDebugCodeBlock, res->num_blocks);
 810         for (i = 0; i < res->num_blocks; ++i) {
 811                 res->code_blocks [i].type = read_leb128 (p, &p);
 812                 res->code_blocks [i].parent = read_leb128 (p, &p);
 813                 res->code_blocks [i].start_offset = read_leb128 (p, &p);
 814                 res->code_blocks [i].end_offset = read_leb128 (p, &p);
 815         }
 816
 817         p = symfile->raw_contents + locals_offset;
 818         num_locals = read_leb128 (p, &p);
 819
 820         res->num_locals = num_locals;
 821         res->locals = g_new0 (MonoDebugLocalVar, num_locals);
 822
 823         for (i = 0; i < num_locals; ++i) {
 824                 res->locals [i].index = read_leb128 (p, &p);
 825                 len = read_leb128 (p, &p);
 826                 res->locals [i].name = (char *)g_malloc (len + 1);
 827                 memcpy (res->locals [i].name, p, len);
 828                 res->locals [i].name [len] = '\0';
 829                 p += len;
 830                 block_index = read_leb128 (p, &p);
 831                 if (block_index >= 1 && block_index <= res->num_blocks)
 832                         res->locals [i].block = &res->code_blocks [block_index - 1];
 833         }
 834
 835         return res;
 836 }