mono/metadata/debug-mono-symfile.c

   1 /**
   2  * \file
   3  *
   4  *   Support for reading debug info from .mdb files.
   5  *
   6  * Author:
   7  *      Mono Project (http://www.mono-project.com)
   8  *
   9  * Copyright (C) 2005-2008 Novell, Inc. (http://www.novell.com)
  10  * Copyright 2012 Xamarin Inc (http://www.xamarin.com)
  11  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  12  */
  13
  14 #include <config.h>
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <errno.h>
  18 #include <string.h>
  19 #ifdef HAVE_SYS_PARAM_H
  20 #include <sys/param.h>
  21 #endif
  22 #include <sys/stat.h>
  23 #include <mono/metadata/metadata.h>
  24 #include <mono/metadata/tabledefs.h>
  25 #include <mono/metadata/tokentype.h>
  26 #include <mono/metadata/appdomain.h>
  27 #include <mono/metadata/exception.h>
  28 #include <mono/metadata/debug-helpers.h>
  29 #include <mono/metadata/mono-debug.h>
  30 #include <mono/metadata/debug-mono-symfile.h>
  31 #include <mono/metadata/mono-endian.h>
  32 #include <mono/metadata/metadata-internals.h>
  33 #include <mono/metadata/class-internals.h>
  34 #include <mono/utils/mono-mmap.h>
  35 #include <mono/utils/bsearch.h>
  36
  37 #ifndef DISABLE_MDB
  38
  39 #include <fcntl.h>
  40 #ifdef HAVE_UNISTD_H
  41 #include <unistd.h>
  42 #endif
  43
  44 #define RANGE_TABLE_CHUNK_SIZE          256
  45 #define CLASS_TABLE_CHUNK_SIZE          256
  46 #define TYPE_TABLE_PTR_CHUNK_SIZE       256
  47 #define TYPE_TABLE_CHUNK_SIZE           65536
  48
  49 struct _MonoSymbolFile {
  50         const uint8_t *raw_contents;
  51         int raw_contents_size;
  52         void *raw_contents_handle;
  53         int major_version;
  54         int minor_version;
  55         char *filename;
  56         GHashTable *method_hash;
  57         GHashTable *source_hash;
  58         MonoSymbolFileOffsetTable *offset_table;
  59         gboolean was_loaded_from_memory;
  60 };
  61
  62 static void
  63 free_method_info (MonoDebugMethodInfo *minfo)
  64 {
  65         g_free (minfo);
  66 }
  67
  68 static void
  69 free_source_info (MonoDebugSourceInfo *sinfo)
  70 {
  71         g_free (sinfo->source_file);
  72         g_free (sinfo->guid);
  73         g_free (sinfo->hash);
  74         g_free (sinfo);
  75 }
  76
  77 static int
  78 load_symfile (MonoDebugHandle *handle, MonoSymbolFile *symfile, mono_bool in_the_debugger)
  79 {
  80         const char *ptr, *start;
  81         gchar *guid;
  82         uint64_t magic;
  83         int minor, major;
  84
  85         ptr = start = (const char*)symfile->raw_contents;
  86         if (!ptr)
  87                 return FALSE;
  88
  89         magic = read64(ptr);
  90         ptr += sizeof(uint64_t);
  91         if (magic != MONO_SYMBOL_FILE_MAGIC) {
  92                 if (!in_the_debugger)
  93                         g_warning ("Symbol file %s is not a mono symbol file", symfile->filename);
  94                 return FALSE;
  95         }
  96
  97         major = read32(ptr);
  98         ptr += sizeof(uint32_t);
  99         minor = read32(ptr);
 100         ptr += sizeof(uint32_t);
 101
 102         /*
 103          * 50.0 is the frozen version for Mono 2.0.
 104          *
 105          * Nobody except me (Martin) is allowed to check the minor version.
 106          */
 107         if (major != MONO_SYMBOL_FILE_MAJOR_VERSION) {
 108                 if (!in_the_debugger)
 109                         g_warning ("Symbol file %s has incorrect version (expected %d.%d, got %d)",
 110                                    symfile->filename, MONO_SYMBOL_FILE_MAJOR_VERSION,
 111                                    MONO_SYMBOL_FILE_MINOR_VERSION, major);
 112                 return FALSE;
 113         }
 114
 115         guid = mono_guid_to_string ((const uint8_t *) ptr);
 116         ptr += 16;
 117
 118         if (strcmp (handle->image->guid, guid)) {
 119                 if (!in_the_debugger)
 120                         g_warning ("Symbol file %s doesn't match image %s", symfile->filename,
 121                                    handle->image->name);
 122                 if (guid)
 123                         g_free (guid);
 124                 return FALSE;
 125         }
 126
 127         symfile->major_version = major;
 128         symfile->minor_version = minor;
 129
 130         symfile->offset_table = (MonoSymbolFileOffsetTable *) ptr;
 131
 132         symfile->method_hash = g_hash_table_new_full (
 133                 NULL, NULL, NULL, (GDestroyNotify) free_method_info);
 134
 135         symfile->source_hash = g_hash_table_new_full (
 136                 NULL, NULL, NULL, (GDestroyNotify) free_source_info);
 137
 138         g_free (guid);
 139         return TRUE;
 140 }
 141
 142 /**
 143  * mono_debug_open_mono_symbols:
 144  */
 145 MonoSymbolFile *
 146 mono_debug_open_mono_symbols (MonoDebugHandle *handle, const uint8_t *raw_contents,
 147                               int size, gboolean in_the_debugger)
 148 {
 149         MonoSymbolFile *symfile;
 150
 151         mono_debugger_lock ();
 152         symfile = g_new0 (MonoSymbolFile, 1);
 153
 154         if (raw_contents != NULL) {
 155                 unsigned char *p;
 156                 symfile->raw_contents_size = size;
 157                 symfile->raw_contents = p = (unsigned char *)g_malloc (size);
 158                 memcpy (p, raw_contents, size);
 159                 symfile->filename = g_strdup_printf ("LoadedFromMemory");
 160                 symfile->was_loaded_from_memory = TRUE;
 161         } else {
 162                 MonoFileMap *f;
 163
 164                 symfile->filename = g_strdup_printf ("%s.mdb", mono_image_get_filename (handle->image));
 165                 symfile->was_loaded_from_memory = FALSE;
 166                 if ((f = mono_file_map_open (symfile->filename))) {
 167                         symfile->raw_contents_size = mono_file_map_size (f);
 168                         if (symfile->raw_contents_size == 0) {
 169                                 if (!in_the_debugger)
 170                                         g_warning ("stat of %s failed: %s",
 171                                                    symfile->filename,  g_strerror (errno));
 172                         } else {
 173                                 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);
 174                         }
 175
 176                         mono_file_map_close (f);
 177                 }
 178         }
 179
 180         if (load_symfile (handle, symfile, in_the_debugger)) {
 181                 mono_debugger_unlock ();
 182                 return symfile;
 183         } else if (!in_the_debugger) {
 184                 mono_debug_close_mono_symbol_file (symfile);
 185                 mono_debugger_unlock ();
 186                 return NULL;
 187         }
 188
 189         mono_debugger_unlock ();
 190         return symfile;
 191 }
 192
 193 /**
 194  * mono_debug_close_mono_symbol_file:
 195  */
 196 void
 197 mono_debug_close_mono_symbol_file (MonoSymbolFile *symfile)
 198 {
 199         if (!symfile)
 200                 return;
 201
 202         mono_debugger_lock ();
 203         if (symfile->method_hash)
 204                 g_hash_table_destroy (symfile->method_hash);
 205
 206         if (symfile->raw_contents) {
 207                 if (symfile->was_loaded_from_memory)
 208                         g_free ((gpointer)symfile->raw_contents);
 209                 else
 210                         mono_file_unmap ((gpointer) symfile->raw_contents, symfile->raw_contents_handle);
 211         }
 212
 213         if (symfile->filename)
 214                 g_free (symfile->filename);
 215         g_free (symfile);
 216         mono_debugger_unlock ();
 217 }
 218
 219 /**
 220  * mono_debug_symfile_is_loaded:
 221  */
 222 mono_bool
 223 mono_debug_symfile_is_loaded (MonoSymbolFile *symfile)
 224 {
 225         return symfile && symfile->offset_table;
 226 }
 227
 228 static int
 229 read_leb128 (const uint8_t *ptr, const uint8_t **rptr)
 230 {
 231         int ret = 0;
 232         int shift = 0;
 233         char b;
 234
 235         do {
 236                 b = *ptr++;
 237
 238                 ret = ret | ((b & 0x7f) << shift);
 239                 shift += 7;
 240         } while ((b & 0x80) == 0x80);
 241
 242         if (rptr)
 243                 *rptr = ptr;
 244
 245         return ret;
 246 }
 247
 248 static gchar *
 249 read_string (const uint8_t *ptr, const uint8_t **endp)
 250 {
 251         gchar *s;
 252         int len = read_leb128 (ptr, &ptr);
 253
 254         s = g_filename_from_utf8 ((const char *) ptr, len, NULL, NULL, NULL);
 255         ptr += len;
 256         if (endp)
 257                 *endp = ptr;
 258         return s;
 259 }
 260
 261 typedef struct {
 262         MonoSymbolFile *symfile;
 263         int line_base, line_range, max_address_incr;
 264         uint8_t opcode_base;
 265         uint32_t last_line, last_file, last_offset;
 266         uint32_t first_file;
 267         int line, file, offset;
 268         gboolean is_hidden;
 269 } StatementMachine;
 270
 271 static gboolean
 272 check_line (StatementMachine *stm, int offset, MonoDebugSourceLocation **location)
 273 {
 274         gchar *source_file = NULL;
 275
 276         if (stm->offset <= offset) {
 277                 stm->last_offset = stm->offset;
 278                 stm->last_file = stm->file;
 279                 if (stm->line != 0xfeefee)
 280                         stm->last_line = stm->line;
 281                 return FALSE;
 282         }
 283
 284         if (stm->last_file) {
 285                 int offset = read32(&(stm->symfile->offset_table->_source_table_offset)) +
 286                         (stm->last_file - 1) * sizeof (MonoSymbolFileSourceEntry);
 287                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 288                         (stm->symfile->raw_contents + offset);
 289
 290                 source_file = read_string (stm->symfile->raw_contents + read32(&(se->_data_offset)), NULL);
 291         }
 292
 293         if (stm->last_line == 0) {
 294                 /*
 295                  * The IL offset is less than the first IL offset which has a corresponding
 296                  * source line.
 297                  */
 298                 *location = NULL;
 299                 return TRUE;
 300         }
 301
 302         *location = g_new0 (MonoDebugSourceLocation, 1);
 303         (*location)->source_file = source_file;
 304         (*location)->row = stm->last_line;
 305         (*location)->il_offset = stm->last_offset;
 306         return TRUE;
 307 }
 308
 309 /**
 310  * mono_debug_symfile_lookup_location:
 311  * \param minfo A \c MonoDebugMethodInfo which can be retrieved by \c mono_debug_lookup_method.
 312  * \param offset IL offset within the corresponding method's CIL code.
 313  *
 314  * This function is similar to \c mono_debug_lookup_location, but we
 315  * already looked up the method and also already did the
 316  * native address -> IL offset mapping.
 317  */
 318 MonoDebugSourceLocation *
 319 mono_debug_symfile_lookup_location (MonoDebugMethodInfo *minfo, uint32_t offset)
 320 {
 321         MonoDebugSourceLocation *location = NULL;
 322         MonoSymbolFile *symfile;
 323         const unsigned char *ptr;
 324         StatementMachine stm;
 325
 326 #define DW_LNS_copy 1
 327 #define DW_LNS_advance_pc 2
 328 #define DW_LNS_advance_line 3
 329 #define DW_LNS_set_file 4
 330 #define DW_LNS_const_add_pc 8
 331
 332 #define DW_LNE_end_sequence 1
 333 #define DW_LNE_MONO_negate_is_hidden 0x40
 334
 335 #define DW_LNE_MONO__extensions_start 0x40
 336 #define DW_LNE_MONO__extensions_end 0x7f
 337
 338         if ((symfile = minfo->handle->symfile) == NULL)
 339                 return NULL;
 340
 341         stm.line_base = read32 (&symfile->offset_table->_line_number_table_line_base);
 342         stm.line_range = read32 (&symfile->offset_table->_line_number_table_line_range);
 343         stm.opcode_base = (uint8_t) read32 (&symfile->offset_table->_line_number_table_opcode_base);
 344         stm.max_address_incr = (255 - stm.opcode_base) / stm.line_range;
 345
 346         mono_debugger_lock ();
 347
 348         ptr = symfile->raw_contents + minfo->lnt_offset;
 349
 350         stm.symfile = symfile;
 351         stm.offset = stm.last_offset = 0;
 352         stm.last_file = 0;
 353         stm.last_line = 0;
 354         stm.first_file = 0;
 355         stm.file = 1;
 356         stm.line = 1;
 357         stm.is_hidden = FALSE;
 358
 359         while (TRUE) {
 360                 uint8_t opcode = *ptr++;
 361
 362                 if (opcode == 0) {
 363                         uint8_t size = *ptr++;
 364                         const unsigned char *end_ptr = ptr + size;
 365
 366                         opcode = *ptr++;
 367
 368                         if (opcode == DW_LNE_end_sequence) {
 369                                 if (check_line (&stm, -1, &location))
 370                                         goto out_success;
 371                                 break;
 372                         } else if (opcode == DW_LNE_MONO_negate_is_hidden) {
 373                                 stm.is_hidden = !stm.is_hidden;
 374                         } else if ((opcode >= DW_LNE_MONO__extensions_start) &&
 375                                    (opcode <= DW_LNE_MONO__extensions_end)) {
 376                                 ; // reserved for future extensions
 377                         } else {
 378                                 g_warning ("Unknown extended opcode %x in LNT", opcode);
 379                         }
 380
 381                         ptr = end_ptr;
 382                         continue;
 383                 } else if (opcode < stm.opcode_base) {
 384                         switch (opcode) {
 385                         case DW_LNS_copy:
 386                                 if (check_line (&stm, offset, &location))
 387                                         goto out_success;
 388                                 break;
 389                         case DW_LNS_advance_pc:
 390                                 stm.offset += read_leb128 (ptr, &ptr);
 391                                 break;
 392                         case DW_LNS_advance_line:
 393                                 stm.line += read_leb128 (ptr, &ptr);
 394                                 break;
 395                         case DW_LNS_set_file:
 396                                 stm.file = read_leb128 (ptr, &ptr);
 397                                 break;
 398                         case DW_LNS_const_add_pc:
 399                                 stm.offset += stm.max_address_incr;
 400                                 break;
 401                         default:
 402                                 g_warning ("Unknown standard opcode %x in LNT", opcode);
 403                                 goto error_out;
 404                         }
 405                 } else {
 406                         opcode -= stm.opcode_base;
 407
 408                         stm.offset += opcode / stm.line_range;
 409                         stm.line += stm.line_base + (opcode % stm.line_range);
 410
 411                         if (check_line (&stm, offset, &location))
 412                                 goto out_success;
 413                 }
 414         }
 415
 416  error_out:
 417         mono_debugger_unlock ();
 418         return NULL;
 419
 420  out_success:
 421         mono_debugger_unlock ();
 422         return location;
 423 }
 424
 425 static void
 426 add_line (StatementMachine *stm, GPtrArray *il_offset_array, GPtrArray *line_number_array, GPtrArray *source_file_array, GPtrArray *hidden_array)
 427 {
 428         g_ptr_array_add (il_offset_array, GUINT_TO_POINTER (stm->offset));
 429         g_ptr_array_add (line_number_array, GUINT_TO_POINTER (stm->line));
 430         g_ptr_array_add (source_file_array, GUINT_TO_POINTER (stm->file));
 431         g_ptr_array_add (hidden_array, GUINT_TO_POINTER (stm->is_hidden || stm->line <= 0));
 432
 433         if (!stm->is_hidden && !stm->first_file)
 434                 stm->first_file = stm->file;
 435 }
 436
 437 /**
 438  * mono_debug_symfile_free_location:
 439  *
 440  * Free a \c MonoDebugSourceLocation returned by
 441  * \c mono_debug_symfile_lookup_location
 442  */
 443 void
 444 mono_debug_symfile_free_location (MonoDebugSourceLocation  *location)
 445 {
 446         g_free (location->source_file);
 447         g_free (location);
 448 }
 449
 450 /*
 451  * LOCKING: Assumes the debugger lock is held.
 452  */
 453 static MonoDebugSourceInfo*
 454 get_source_info (MonoSymbolFile *symfile, int index)
 455 {
 456         MonoDebugSourceInfo *info;
 457
 458         info = (MonoDebugSourceInfo *)g_hash_table_lookup (symfile->source_hash, GUINT_TO_POINTER (index));
 459         if (!info) {
 460                 int offset = read32(&(symfile->offset_table->_source_table_offset)) +
 461                         (index - 1) * sizeof (MonoSymbolFileSourceEntry);
 462                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 463                         (symfile->raw_contents + offset);
 464                 const uint8_t *ptr = symfile->raw_contents + read32(&(se->_data_offset));
 465
 466                 info = g_new0 (MonoDebugSourceInfo, 1);
 467                 info->source_file = read_string (ptr, &ptr);
 468                 info->guid = (guint8 *)g_malloc0 (16);
 469                 memcpy (info->guid, ptr, 16);
 470                 ptr += 16;
 471                 info->hash = (guint8 *)g_malloc0 (16);
 472                 memcpy (info->hash, ptr, 16);
 473                 ptr += 16;
 474                 g_hash_table_insert (symfile->source_hash, GUINT_TO_POINTER (index), info);
 475         }
 476         return info;
 477 }
 478
 479 typedef enum {
 480         LNT_FLAG_HAS_COLUMN_INFO = 1 << 1,
 481         LNT_FLAG_HAS_END_INFO = 1 << 2,
 482 } LineNumberTableFlags;
 483
 484 static LineNumberTableFlags
 485 method_get_lnt_flags (MonoDebugMethodInfo *minfo)
 486 {
 487         MonoSymbolFile *symfile;
 488         const unsigned char *ptr;
 489         guint32 flags;
 490
 491         if ((symfile = minfo->handle->symfile) == NULL)
 492                 return (LineNumberTableFlags)0;
 493
 494         ptr = symfile->raw_contents + minfo->data_offset;
 495
 496         /* Has to read 'flags' which is preceeded by a bunch of other data */
 497         /* compile_unit_index */
 498         read_leb128 (ptr, &ptr);
 499         /* local variable table offset */
 500         read_leb128 (ptr, &ptr);
 501         /* namespace id */
 502         read_leb128 (ptr, &ptr);
 503         /* code block table offset */
 504         read_leb128 (ptr, &ptr);
 505         /* scope variable table offset */
 506         read_leb128 (ptr, &ptr);
 507         /* real name offset */
 508         read_leb128 (ptr, &ptr);
 509
 510         flags = read_leb128 (ptr, &ptr);
 511         return (LineNumberTableFlags)flags;
 512 }
 513
 514 /*
 515  * mono_debug_symfile_get_seq_points:
 516  *
 517  * On return, SOURCE_FILE_LIST will point to a GPtrArray of MonoDebugSourceFile
 518  * structures, and SOURCE_FILES will contain indexes into this array.
 519  * The MonoDebugSourceFile structures are owned by this module.
 520  */
 521 void
 522 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)
 523 {
 524         // FIXME: Unify this with mono_debug_symfile_lookup_location
 525         MonoSymbolFile *symfile;
 526         const unsigned char *ptr;
 527         StatementMachine stm;
 528         uint32_t i, j, n;
 529         LineNumberTableFlags flags;
 530         GPtrArray *il_offset_array, *line_number_array, *source_file_array, *hidden_array;
 531         gboolean has_column_info, has_end_info;
 532         MonoSymSeqPoint *sps;
 533
 534         if (source_file_list)
 535                 *source_file_list = NULL;
 536         if (seq_points)
 537                 *seq_points = NULL;
 538         if (n_seq_points)
 539                 *n_seq_points = 0;
 540         if (source_files)
 541                 *source_files = NULL;
 542         if (source_file)
 543                 *source_file = NULL;
 544
 545         if ((symfile = minfo->handle->symfile) == NULL)
 546                 return;
 547
 548         flags = method_get_lnt_flags (minfo);
 549         has_column_info = (flags & LNT_FLAG_HAS_COLUMN_INFO) > 0;
 550         has_end_info = (flags & LNT_FLAG_HAS_END_INFO) > 0;
 551
 552         il_offset_array = g_ptr_array_new ();
 553         line_number_array = g_ptr_array_new ();
 554         source_file_array = g_ptr_array_new ();
 555         hidden_array = g_ptr_array_new();
 556
 557         stm.line_base = read32 (&symfile->offset_table->_line_number_table_line_base);
 558         stm.line_range = read32 (&symfile->offset_table->_line_number_table_line_range);
 559         stm.opcode_base = (uint8_t) read32 (&symfile->offset_table->_line_number_table_opcode_base);
 560         stm.max_address_incr = (255 - stm.opcode_base) / stm.line_range;
 561
 562         mono_debugger_lock ();
 563
 564         ptr = symfile->raw_contents + minfo->lnt_offset;
 565
 566         stm.symfile = symfile;
 567         stm.offset = stm.last_offset = 0;
 568         stm.last_file = 0;
 569         stm.last_line = 0;
 570         stm.first_file = 0;
 571         stm.file = 1;
 572         stm.line = 1;
 573         stm.is_hidden = FALSE;
 574
 575         while (TRUE) {
 576                 uint8_t opcode = *ptr++;
 577
 578                 if (opcode == 0) {
 579                         uint8_t size = *ptr++;
 580                         const unsigned char *end_ptr = ptr + size;
 581
 582                         opcode = *ptr++;
 583
 584                         if (opcode == DW_LNE_end_sequence) {
 585                                 if (il_offset_array->len == 0)
 586                                         /* Empty table */
 587                                         break;
 588                                 break;
 589                         } else if (opcode == DW_LNE_MONO_negate_is_hidden) {
 590                                 stm.is_hidden = !stm.is_hidden;
 591                         } else if ((opcode >= DW_LNE_MONO__extensions_start) &&
 592                                    (opcode <= DW_LNE_MONO__extensions_end)) {
 593                                 ; // reserved for future extensions
 594                         } else {
 595                                 g_warning ("Unknown extended opcode %x in LNT", opcode);
 596                         }
 597
 598                         ptr = end_ptr;
 599                         continue;
 600                 } else if (opcode < stm.opcode_base) {
 601                         switch (opcode) {
 602                         case DW_LNS_copy:
 603                                 add_line (&stm, il_offset_array, line_number_array, source_file_array, hidden_array);
 604                                 break;
 605                         case DW_LNS_advance_pc:
 606                                 stm.offset += read_leb128 (ptr, &ptr);
 607                                 break;
 608                         case DW_LNS_advance_line:
 609                                 stm.line += read_leb128 (ptr, &ptr);
 610                                 break;
 611                         case DW_LNS_set_file:
 612                                 stm.file = read_leb128 (ptr, &ptr);
 613                                 break;
 614                         case DW_LNS_const_add_pc:
 615                                 stm.offset += stm.max_address_incr;
 616                                 break;
 617                         default:
 618                                 g_warning ("Unknown standard opcode %x in LNT", opcode);
 619                                 g_assert_not_reached ();
 620                         }
 621                 } else {
 622                         opcode -= stm.opcode_base;
 623
 624                         stm.offset += opcode / stm.line_range;
 625                         stm.line += stm.line_base + (opcode % stm.line_range);
 626
 627                         add_line (&stm, il_offset_array, line_number_array, source_file_array, hidden_array);
 628                 }
 629         }
 630
 631         if (!stm.file && stm.first_file)
 632                 stm.file = stm.first_file;
 633
 634         if (stm.file && source_file) {
 635                 int offset = read32(&(stm.symfile->offset_table->_source_table_offset)) +
 636                         (stm.file - 1) * sizeof (MonoSymbolFileSourceEntry);
 637                 MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *)
 638                         (stm.symfile->raw_contents + offset);
 639
 640                 if (source_file)
 641                         *source_file = read_string (stm.symfile->raw_contents + read32(&(se->_data_offset)), NULL);
 642         }
 643
 644         if (source_file_list) {
 645                 int file, last_file = 0;
 646
 647                 *source_file_list = g_ptr_array_new ();
 648                 if (source_files)
 649                         *source_files = (int *)g_malloc (il_offset_array->len * sizeof (int));
 650
 651                 for (i = 0; i < il_offset_array->len; ++i) {
 652                         file = GPOINTER_TO_UINT (g_ptr_array_index (source_file_array, i));
 653                         if (file && file != last_file) {
 654                                 MonoDebugSourceInfo *info = get_source_info (symfile, file);
 655
 656                                 g_ptr_array_add (*source_file_list, info);
 657                         }
 658                         last_file = file;
 659                         if (source_files)
 660                                 (*source_files) [i] = (*source_file_list)->len - 1;
 661                 }
 662         }
 663
 664         if (n_seq_points) {
 665                 g_assert (seq_points);
 666
 667                 n = il_offset_array->len;
 668                 for (i = 0; i < il_offset_array->len; i++) {
 669                         if (GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 670                                 n --;
 671                         }
 672                 }
 673
 674                 *n_seq_points = n;
 675                 *seq_points = sps = g_new0 (MonoSymSeqPoint, n);
 676                 j = 0;
 677                 for (i = 0; i < il_offset_array->len; ++i) {
 678                         MonoSymSeqPoint *sp = &(sps [j]);
 679                         if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 680                                 sp->il_offset = GPOINTER_TO_UINT (g_ptr_array_index (il_offset_array, i));
 681                                 sp->line = GPOINTER_TO_UINT (g_ptr_array_index (line_number_array, i));
 682                                 sp->column = -1;
 683                                 sp->end_line = -1;
 684                                 sp->end_column = -1;
 685                                 j ++;
 686                         }
 687                 }
 688
 689                 if (has_column_info) {
 690                         j = 0;
 691                         for (i = 0; i < il_offset_array->len; ++i) {
 692                                 MonoSymSeqPoint *sp = &(sps [j]);
 693                                 int column = read_leb128 (ptr, &ptr);
 694                                 if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 695                                         sp->column = column;
 696                                         j++;
 697                                 }
 698                         }
 699                 }
 700
 701                 if (has_end_info) {
 702                         j = 0;
 703                         for (i = 0; i < il_offset_array->len; ++i) {
 704                                 MonoSymSeqPoint *sp = &(sps [j]);
 705                                 int end_row, end_column = -1;
 706
 707                                 end_row = read_leb128 (ptr, &ptr);
 708                                 if (end_row != 0xffffff) {
 709                                         end_row += GPOINTER_TO_UINT (g_ptr_array_index (line_number_array, i));
 710                                         end_column = read_leb128 (ptr, &ptr);
 711                                         if (!GPOINTER_TO_UINT (g_ptr_array_index (hidden_array, i))) {
 712                                                 sp->end_line = end_row;
 713                                                 sp->end_column = end_column;
 714                                                 j++;
 715                                         }
 716                                 }
 717                         }
 718                 }
 719         }
 720
 721         g_ptr_array_free (il_offset_array, TRUE);
 722         g_ptr_array_free (line_number_array, TRUE);
 723         g_ptr_array_free (hidden_array, TRUE);
 724
 725         mono_debugger_unlock ();
 726         return;
 727 }
 728
 729 static int
 730 compare_method (const void *key, const void *object)
 731 {
 732         uint32_t token = GPOINTER_TO_UINT (key);
 733         MonoSymbolFileMethodEntry *me = (MonoSymbolFileMethodEntry*)object;
 734
 735         return token - read32(&(me->_token));
 736 }
 737
 738 /**
 739  * mono_debug_symfile_lookup_method:
 740  */
 741 MonoDebugMethodInfo *
 742 mono_debug_symfile_lookup_method (MonoDebugHandle *handle, MonoMethod *method)
 743 {
 744         MonoSymbolFileMethodEntry *first_ie, *ie;
 745         MonoDebugMethodInfo *minfo;
 746         MonoSymbolFile *symfile = handle->symfile;
 747
 748         if (!symfile->method_hash)
 749                 return NULL;
 750
 751         if (handle->image != mono_class_get_image (mono_method_get_class (method)))
 752                 return NULL;
 753
 754         mono_debugger_lock ();
 755
 756         minfo = (MonoDebugMethodInfo *)g_hash_table_lookup (symfile->method_hash, method);
 757         if (minfo) {
 758                 mono_debugger_unlock ();
 759                 return minfo;
 760         }
 761
 762         first_ie = (MonoSymbolFileMethodEntry *)
 763                 (symfile->raw_contents + read32(&(symfile->offset_table->_method_table_offset)));
 764
 765         ie = (MonoSymbolFileMethodEntry *)mono_binary_search (GUINT_TO_POINTER (mono_method_get_token (method)), first_ie,
 766                                    read32(&(symfile->offset_table->_method_count)),
 767                                    sizeof (MonoSymbolFileMethodEntry), compare_method);
 768
 769         if (!ie) {
 770                 mono_debugger_unlock ();
 771                 return NULL;
 772         }
 773
 774         minfo = g_new0 (MonoDebugMethodInfo, 1);
 775         minfo->index = (ie - first_ie) + 1;
 776         minfo->method = method;
 777         minfo->handle = handle;
 778
 779         minfo->data_offset = read32 (&(ie->_data_offset));
 780         minfo->lnt_offset = read32 (&(ie->_line_number_table));
 781
 782         g_hash_table_insert (symfile->method_hash, method, minfo);
 783
 784         mono_debugger_unlock ();
 785         return minfo;
 786 }
 787
 788 /**
 789  * mono_debug_symfile_lookup_locals:
 790  *
 791  * Return information about the local variables of \p minfo from the symbol file.
 792  * Return NULL if no information can be found.
 793  * The result should be freed using \c mono_debug_symfile_free_locals.
 794  */
 795 MonoDebugLocalsInfo*
 796 mono_debug_symfile_lookup_locals (MonoDebugMethodInfo *minfo)
 797 {
 798         MonoSymbolFile *symfile = minfo->handle->symfile;
 799         const uint8_t *p;
 800         int i, len, locals_offset, num_locals, block_index;
 801         int code_block_table_offset;
 802         MonoDebugLocalsInfo *res;
 803
 804         if (!symfile)
 805                 return NULL;
 806
 807         p = symfile->raw_contents + minfo->data_offset;
 808
 809         /* compile_unit_index = */ read_leb128 (p, &p);
 810         locals_offset = read_leb128 (p, &p);
 811         /* namespace_id = */ read_leb128 (p, &p);
 812         code_block_table_offset = read_leb128 (p, &p);
 813
 814         res = g_new0 (MonoDebugLocalsInfo, 1);
 815
 816         p = symfile->raw_contents + code_block_table_offset;
 817         res->num_blocks = read_leb128 (p, &p);
 818         res->code_blocks = g_new0 (MonoDebugCodeBlock, res->num_blocks);
 819         for (i = 0; i < res->num_blocks; ++i) {
 820                 res->code_blocks [i].type = read_leb128 (p, &p);
 821                 res->code_blocks [i].parent = read_leb128 (p, &p);
 822                 res->code_blocks [i].start_offset = read_leb128 (p, &p);
 823                 res->code_blocks [i].end_offset = read_leb128 (p, &p);
 824         }
 825
 826         p = symfile->raw_contents + locals_offset;
 827         num_locals = read_leb128 (p, &p);
 828
 829         res->num_locals = num_locals;
 830         res->locals = g_new0 (MonoDebugLocalVar, num_locals);
 831
 832         for (i = 0; i < num_locals; ++i) {
 833                 res->locals [i].index = read_leb128 (p, &p);
 834                 len = read_leb128 (p, &p);
 835                 res->locals [i].name = (char *)g_malloc (len + 1);
 836                 memcpy (res->locals [i].name, p, len);
 837                 res->locals [i].name [len] = '\0';
 838                 p += len;
 839                 block_index = read_leb128 (p, &p);
 840                 if (block_index >= 1 && block_index <= res->num_blocks)
 841                         res->locals [i].block = &res->code_blocks [block_index - 1];
 842         }
 843
 844         return res;
 845 }
 846
 847 #else /* DISABLE_MDB */
 848
 849 MonoSymbolFile *
 850 mono_debug_open_mono_symbols (MonoDebugHandle *handle, const uint8_t *raw_contents,
 851                               int size, gboolean in_the_debugger)
 852 {
 853         return NULL;
 854 }
 855
 856 void
 857 mono_debug_close_mono_symbol_file (MonoSymbolFile *symfile)
 858 {
 859 }
 860
 861 mono_bool
 862 mono_debug_symfile_is_loaded (MonoSymbolFile *symfile)
 863 {
 864         return FALSE;
 865 }
 866
 867 MonoDebugMethodInfo *
 868 mono_debug_symfile_lookup_method (MonoDebugHandle *handle, MonoMethod *method)
 869 {
 870         return NULL;
 871 }
 872
 873 void
 874 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)
 875 {
 876         g_assert_not_reached ();
 877 }
 878
 879 MonoDebugSourceLocation *
 880 mono_debug_symfile_lookup_location (MonoDebugMethodInfo *minfo, uint32_t offset)
 881 {
 882         return NULL;
 883 }
 884
 885 MonoDebugLocalsInfo*
 886 mono_debug_symfile_lookup_locals (MonoDebugMethodInfo *minfo)
 887 {
 888         return NULL;
 889 }
 890
 891 void
 892 mono_debug_symfile_free_location (MonoDebugSourceLocation  *location)
 893 {
 894 }
 895
 896 #endif