mono/mini/dwarfwriter.c

   1 /*
   2  * dwarfwriter.c: Creation of DWARF debug information
   3  *
   4  * Author:
   5  *   Zoltan Varga (vargaz@gmail.com)
   6  *
   7  * (C) 2008-2009 Novell, Inc.
   8  */
   9
  10 #include "config.h"
  11 #include <mono/utils/mono-compiler.h>
  12
  13 #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
  14 #include "dwarfwriter.h"
  15
  16 #include <sys/types.h>
  17 #include <ctype.h>
  18 #include <string.h>
  19 #ifdef HAVE_STDINT_H
  20 #include <stdint.h>
  21 #endif
  22
  23 #include <mono/metadata/mono-endian.h>
  24 #include <mono/metadata/debug-mono-symfile.h>
  25 #include <mono/metadata/mono-debug-debugger.h>
  26 #include <mono/utils/mono-compiler.h>
  27
  28 #ifndef HOST_WIN32
  29 #include <mono/utils/freebsd-elf32.h>
  30 #include <mono/utils/freebsd-elf64.h>
  31 #endif
  32
  33 #include <mono/utils/freebsd-dwarf.h>
  34
  35 #define DW_AT_MIPS_linkage_name 0x2007
  36 #define DW_LNE_set_prologue_end 0x0a
  37
  38 typedef struct {
  39         MonoMethod *method;
  40         char *start_symbol, *end_symbol;
  41         guint8 *code;
  42         guint32 code_size;
  43 } MethodLineNumberInfo;
  44
  45 struct _MonoDwarfWriter
  46 {
  47         MonoImageWriter *w;
  48         GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
  49         GHashTable *class_to_reference_die;
  50         int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
  51         GHashTable *file_to_index, *index_to_file, *dir_to_index;
  52         FILE *il_file;
  53         int il_file_line_index, loclist_index;
  54         GSList *cie_program;
  55         FILE *fp;
  56         const char *temp_prefix;
  57         gboolean emit_line;
  58         GSList *line_info;
  59         int cur_file_index;
  60 };
  61
  62 static void
  63 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
  64                                            char *start_symbol, char *end_symbol,
  65                                            guint8 *code, guint32 code_size,
  66                                            MonoDebugMethodJitInfo *debug_info);
  67
  68 /*
  69  * mono_dwarf_writer_create:
  70  *
  71  *   Create a DWARF writer object. WRITER is the underlying image writer this
  72  * writer will emit to. IL_FILE is the file where IL code will be dumped to for
  73  * methods which have no line number info. It can be NULL.
  74  */
  75 MonoDwarfWriter*
  76 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean emit_line_numbers)
  77 {
  78         MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
  79
  80         w->w = writer;
  81         w->il_file = il_file;
  82         w->il_file_line_index = il_file_start_line;
  83
  84         w->emit_line = emit_line_numbers;
  85
  86         w->fp = mono_img_writer_get_fp (w->w);
  87         w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
  88
  89         w->class_to_die = g_hash_table_new (NULL, NULL);
  90         w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
  91         w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
  92         w->class_to_reference_die = g_hash_table_new (NULL, NULL);
  93         w->cur_file_index = -1;
  94
  95         return w;
  96 }
  97
  98 void
  99 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
 100 {
 101         g_free (w);
 102 }
 103
 104 int
 105 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
 106 {
 107         return w->il_file_line_index;
 108 }
 109
 110 /* Wrappers around the image writer functions */
 111
 112 static inline void
 113 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
 114 {
 115         mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
 116 }
 117
 118 static inline void
 119 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
 120 {
 121         mono_img_writer_emit_push_section (w->w, section_name, subsection);
 122 }
 123
 124 static inline void
 125 emit_pop_section (MonoDwarfWriter *w)
 126 {
 127         mono_img_writer_emit_pop_section (w->w);
 128 }
 129
 130 static inline void
 131 emit_label (MonoDwarfWriter *w, const char *name)
 132 {
 133         mono_img_writer_emit_label (w->w, name);
 134 }
 135
 136 static inline void
 137 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
 138 {
 139         mono_img_writer_emit_bytes (w->w, buf, size);
 140 }
 141
 142 static inline void
 143 emit_string (MonoDwarfWriter *w, const char *value)
 144 {
 145         mono_img_writer_emit_string (w->w, value);
 146 }
 147
 148 static inline void
 149 emit_line (MonoDwarfWriter *w)
 150 {
 151         mono_img_writer_emit_line (w->w);
 152 }
 153
 154 static inline void
 155 emit_alignment (MonoDwarfWriter *w, int size)
 156 {
 157         mono_img_writer_emit_alignment (w->w, size);
 158 }
 159
 160 static inline void
 161 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
 162 {
 163         mono_img_writer_emit_pointer_unaligned (w->w, target);
 164 }
 165
 166 static inline void
 167 emit_pointer (MonoDwarfWriter *w, const char *target)
 168 {
 169         mono_img_writer_emit_pointer (w->w, target);
 170 }
 171
 172 static inline void
 173 emit_int16 (MonoDwarfWriter *w, int value)
 174 {
 175         mono_img_writer_emit_int16 (w->w, value);
 176 }
 177
 178 static inline void
 179 emit_int32 (MonoDwarfWriter *w, int value)
 180 {
 181         mono_img_writer_emit_int32 (w->w, value);
 182 }
 183
 184 static inline void
 185 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
 186 {
 187         mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
 188 }
 189
 190 static inline void
 191 emit_byte (MonoDwarfWriter *w, guint8 val)
 192 {
 193         mono_img_writer_emit_byte (w->w, val);
 194 }
 195
 196 static void
 197 emit_escaped_string (MonoDwarfWriter *w, char *value)
 198 {
 199         int i, len;
 200
 201         len = strlen (value);
 202         for (i = 0; i < len; ++i) {
 203                 char c = value [i];
 204                 if (!(isalnum (c))) {
 205                         switch (c) {
 206                         case '_':
 207                         case '-':
 208                         case ':':
 209                         case '.':
 210                         case ',':
 211                         case '/':
 212                         case '<':
 213                         case '>':
 214                         case '`':
 215                         case '(':
 216                         case ')':
 217                         case '[':
 218                         case ']':
 219                                 break;
 220                         default:
 221                                 value [i] = '_';
 222                                 break;
 223                         }
 224                 }
 225         }
 226         mono_img_writer_emit_string (w->w, value);
 227 }
 228
 229 static G_GNUC_UNUSED void
 230 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
 231 {
 232         do {
 233                 guint8 b = value & 0x7f;
 234                 value >>= 7;
 235                 if (value != 0) /* more bytes to come */
 236                         b |= 0x80;
 237                 emit_byte (w, b);
 238         } while (value);
 239 }
 240
 241 static G_GNUC_UNUSED void
 242 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
 243 {
 244         gboolean more = 1;
 245         gboolean negative = (value < 0);
 246         guint32 size = 64;
 247         guint8 byte;
 248
 249         while (more) {
 250                 byte = value & 0x7f;
 251                 value >>= 7;
 252                 /* the following is unnecessary if the
 253                  * implementation of >>= uses an arithmetic rather
 254                  * than logical shift for a signed left operand
 255                  */
 256                 if (negative)
 257                         /* sign extend */
 258                         value |= - ((gint64)1 <<(size - 7));
 259                 /* sign bit of byte is second high order bit (0x40) */
 260                 if ((value == 0 && !(byte & 0x40)) ||
 261                         (value == -1 && (byte & 0x40)))
 262                         more = 0;
 263                 else
 264                         byte |= 0x80;
 265                 emit_byte (w, byte);
 266         }
 267 }
 268
 269 static G_GNUC_UNUSED void
 270 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
 271 {
 272         guint8 *p = buf;
 273
 274         do {
 275                 guint8 b = value & 0x7f;
 276                 value >>= 7;
 277                 if (value != 0) /* more bytes to come */
 278                         b |= 0x80;
 279                 *p ++ = b;
 280         } while (value);
 281
 282         *endbuf = p;
 283 }
 284
 285 static G_GNUC_UNUSED void
 286 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
 287 {
 288         gboolean more = 1;
 289         gboolean negative = (value < 0);
 290         guint32 size = 32;
 291         guint8 byte;
 292         guint8 *p = buf;
 293
 294         while (more) {
 295                 byte = value & 0x7f;
 296                 value >>= 7;
 297                 /* the following is unnecessary if the
 298                  * implementation of >>= uses an arithmetic rather
 299                  * than logical shift for a signed left operand
 300                  */
 301                 if (negative)
 302                         /* sign extend */
 303                         value |= - (1 <<(size - 7));
 304                 /* sign bit of byte is second high order bit (0x40) */
 305                 if ((value == 0 && !(byte & 0x40)) ||
 306                         (value == -1 && (byte & 0x40)))
 307                         more = 0;
 308                 else
 309                         byte |= 0x80;
 310                 *p ++= byte;
 311         }
 312
 313         *endbuf = p;
 314 }
 315
 316 static void
 317 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
 318                                    int *attrs, int attrs_len)
 319 {
 320         int i;
 321
 322         emit_uleb128 (w, code);
 323         emit_uleb128 (w, tag);
 324         emit_byte (w, has_child);
 325
 326         for (i = 0; i < attrs_len; i++)
 327                 emit_uleb128 (w, attrs [i]);
 328         emit_uleb128 (w, 0);
 329         emit_uleb128 (w, 0);
 330 }
 331
 332 static void
 333 emit_cie (MonoDwarfWriter *w)
 334 {
 335         emit_section_change (w, ".debug_frame", 0);
 336
 337         emit_alignment (w, 8);
 338
 339         /* Emit a CIE */
 340         emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
 341         emit_label (w, ".Lcie0_start");
 342         emit_int32 (w, 0xffffffff); /* CIE id */
 343         emit_byte (w, 3); /* version */
 344         emit_string (w, ""); /* augmention */
 345         emit_sleb128 (w, 1); /* code alignment factor */
 346         emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
 347         emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
 348
 349         w->cie_program = w->cie_program;
 350         if (w->cie_program) {
 351                 guint32 uw_info_len;
 352                 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
 353                 emit_bytes (w, uw_info, uw_info_len);
 354                 g_free (uw_info);
 355         }
 356
 357         emit_alignment (w, sizeof (gpointer));
 358         emit_label (w, ".Lcie0_end");
 359 }
 360
 361 static void
 362 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
 363 {
 364         gssize val = (gssize)ptr;
 365         emit_bytes (w, (guint8*)&val, sizeof (gpointer));
 366 }
 367
 368 static void
 369 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
 370                   guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
 371 {
 372         char symbol1 [128];
 373         char symbol2 [128];
 374         GSList *l;
 375         guint8 *uw_info;
 376         guint32 uw_info_len;
 377
 378         emit_section_change (w, ".debug_frame", 0);
 379
 380         sprintf (symbol1, ".Lfde%d_start", fde_index);
 381         sprintf (symbol2, ".Lfde%d_end", fde_index);
 382         emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
 383         emit_label (w, symbol1);
 384         emit_int32 (w, 0); /* CIE_pointer */
 385         if (start_symbol) {
 386                 emit_pointer (w, start_symbol); /* initial_location */
 387                 if (end_symbol)
 388                         emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
 389                 else {
 390                         g_assert (code_size);
 391                         emit_int32 (w, code_size);
 392                 }
 393         } else {
 394                 emit_pointer_value (w, code);
 395                 emit_int32 (w, code_size);
 396         }
 397 #if SIZEOF_VOID_P == 8
 398         /* Upper 32 bits of code size */
 399         emit_int32 (w, 0);
 400 #endif
 401
 402         l = unwind_ops;
 403         if (w->cie_program) {
 404                 // FIXME: Check that the ops really begin with the CIE program */
 405                 int i;
 406
 407                 for (i = 0; i < g_slist_length (w->cie_program); ++i)
 408                         if (l)
 409                                 l = l->next;
 410         }
 411
 412         /* Convert the list of MonoUnwindOps to the format used by DWARF */
 413         uw_info = mono_unwind_ops_encode_full (l, &uw_info_len, FALSE);
 414         emit_bytes (w, uw_info, uw_info_len);
 415         g_free (uw_info);
 416
 417         emit_alignment (w, sizeof (mgreg_t));
 418         emit_label (w, symbol2);
 419 }
 420
 421 /* Abbrevations */
 422 #define ABBREV_COMPILE_UNIT 1
 423 #define ABBREV_SUBPROGRAM 2
 424 #define ABBREV_PARAM 3
 425 #define ABBREV_BASE_TYPE 4
 426 #define ABBREV_STRUCT_TYPE 5
 427 #define ABBREV_DATA_MEMBER 6
 428 #define ABBREV_TYPEDEF 7
 429 #define ABBREV_ENUM_TYPE 8
 430 #define ABBREV_ENUMERATOR 9
 431 #define ABBREV_NAMESPACE 10
 432 #define ABBREV_VARIABLE 11
 433 #define ABBREV_VARIABLE_LOCLIST 12
 434 #define ABBREV_POINTER_TYPE 13
 435 #define ABBREV_REFERENCE_TYPE 14
 436 #define ABBREV_PARAM_LOCLIST 15
 437 #define ABBREV_INHERITANCE 16
 438 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
 439 #define ABBREV_TRAMP_SUBPROGRAM 18
 440
 441 static int compile_unit_attr [] = {
 442         DW_AT_producer     ,DW_FORM_string,
 443     DW_AT_name         ,DW_FORM_string,
 444     DW_AT_comp_dir     ,DW_FORM_string,
 445         DW_AT_language     ,DW_FORM_data1,
 446     DW_AT_low_pc       ,DW_FORM_addr,
 447     DW_AT_high_pc      ,DW_FORM_addr,
 448         DW_AT_stmt_list    ,DW_FORM_data4
 449 };
 450
 451 static int subprogram_attr [] = {
 452         DW_AT_name         , DW_FORM_string,
 453         DW_AT_MIPS_linkage_name, DW_FORM_string,
 454         DW_AT_decl_file    , DW_FORM_udata,
 455         DW_AT_decl_line    , DW_FORM_udata,
 456 #ifndef TARGET_IOS
 457         DW_AT_description  , DW_FORM_string,
 458 #endif
 459     DW_AT_low_pc       , DW_FORM_addr,
 460     DW_AT_high_pc      , DW_FORM_addr,
 461         DW_AT_frame_base   , DW_FORM_block1
 462 };
 463
 464 static int tramp_subprogram_attr [] = {
 465         DW_AT_name         , DW_FORM_string,
 466     DW_AT_low_pc       , DW_FORM_addr,
 467     DW_AT_high_pc      , DW_FORM_addr,
 468 };
 469
 470 static int param_attr [] = {
 471         DW_AT_name,     DW_FORM_string,
 472         DW_AT_type,     DW_FORM_ref4,
 473         DW_AT_location, DW_FORM_block1
 474 };
 475
 476 static int param_loclist_attr [] = {
 477         DW_AT_name,     DW_FORM_string,
 478         DW_AT_type,     DW_FORM_ref4,
 479         DW_AT_location, DW_FORM_data4
 480 };
 481
 482 static int base_type_attr [] = {
 483         DW_AT_byte_size,   DW_FORM_data1,
 484         DW_AT_encoding,    DW_FORM_data1,
 485         DW_AT_name,        DW_FORM_string
 486 };
 487
 488 static int struct_type_attr [] = {
 489         DW_AT_name,        DW_FORM_string,
 490         DW_AT_byte_size,   DW_FORM_udata,
 491 };
 492
 493 static int data_member_attr [] = {
 494         DW_AT_name,        DW_FORM_string,
 495         DW_AT_type,        DW_FORM_ref4,
 496         DW_AT_data_member_location, DW_FORM_block1
 497 };
 498
 499 static int typedef_attr [] = {
 500         DW_AT_name,        DW_FORM_string,
 501         DW_AT_type,        DW_FORM_ref4
 502 };
 503
 504 static int pointer_type_attr [] = {
 505         DW_AT_type,        DW_FORM_ref4,
 506 };
 507
 508 static int reference_type_attr [] = {
 509         DW_AT_type,        DW_FORM_ref4,
 510 };
 511
 512 static int enum_type_attr [] = {
 513         DW_AT_name,        DW_FORM_string,
 514         DW_AT_byte_size,   DW_FORM_udata,
 515         DW_AT_type,        DW_FORM_ref4,
 516 };
 517
 518 static int enumerator_attr [] = {
 519         DW_AT_name,        DW_FORM_string,
 520         DW_AT_const_value, DW_FORM_sdata,
 521 };
 522
 523 static int namespace_attr [] = {
 524         DW_AT_name,        DW_FORM_string,
 525 };
 526
 527 static int variable_attr [] = {
 528         DW_AT_name,     DW_FORM_string,
 529         DW_AT_type,     DW_FORM_ref4,
 530         DW_AT_location, DW_FORM_block1
 531 };
 532
 533 static int variable_loclist_attr [] = {
 534         DW_AT_name,     DW_FORM_string,
 535         DW_AT_type,     DW_FORM_ref4,
 536         DW_AT_location, DW_FORM_data4
 537 };
 538
 539 static int inheritance_attr [] = {
 540         DW_AT_type,        DW_FORM_ref4,
 541         DW_AT_data_member_location, DW_FORM_block1
 542 };
 543
 544 typedef struct DwarfBasicType {
 545         const char *die_name, *name;
 546         int type;
 547         int size;
 548         int encoding;
 549 } DwarfBasicType;
 550
 551 static DwarfBasicType basic_types [] = {
 552         { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
 553         { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
 554         { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
 555         { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
 556         { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
 557         { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
 558         { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
 559         { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
 560         { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
 561         { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
 562         { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
 563         { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
 564         { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
 565         { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
 566         { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
 567         { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
 568         { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
 569 };
 570
 571 /* Constants for encoding line number special opcodes */
 572 #define OPCODE_BASE 13
 573 #define LINE_BASE -5
 574 #define LINE_RANGE 14
 575
 576 static int
 577 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
 578 {
 579         int index;
 580
 581         g_assert (w->file_to_index);
 582         index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
 583         g_assert (index > 0);
 584         return index - 1;
 585 }
 586
 587 static int
 588 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
 589                                                    gint64 last_mod_time, gint64 file_size)
 590 {
 591         int index;
 592         char *copy;
 593
 594         if (!w->file_to_index) {
 595                 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
 596                 w->index_to_file = g_hash_table_new (NULL, NULL);
 597         }
 598
 599         index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
 600         if (index > 0)
 601                 return index - 1;
 602         index = w->line_number_file_index;
 603         w->line_number_file_index ++;
 604         copy = g_strdup (name);
 605         g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
 606         g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
 607
 608         return index;
 609 }
 610
 611 char *
 612 mono_dwarf_escape_path (const char *name)
 613 {
 614         if (strchr (name, '\\')) {
 615                 char *s;
 616                 int len, i, j;
 617
 618                 len = strlen (name);
 619                 s = (char *)g_malloc0 ((len + 1) * 2);
 620                 j = 0;
 621                 for (i = 0; i < len; ++i) {
 622                         if (name [i] == '\\') {
 623                                 s [j ++] = '\\';
 624                                 s [j ++] = '\\';
 625                         } else {
 626                                 s [j ++] = name [i];
 627                         }
 628                 }
 629                 return s;
 630         }
 631         return g_strdup (name);
 632 }
 633
 634 static void
 635 emit_all_line_number_info (MonoDwarfWriter *w)
 636 {
 637         int i;
 638         GHashTable *dir_to_index, *index_to_dir;
 639         GSList *l;
 640         GSList *info_list;
 641
 642         add_line_number_file_name (w, "<unknown>", 0, 0);
 643
 644         /* Collect files */
 645         info_list = g_slist_reverse (w->line_info);
 646         for (l = info_list; l; l = l->next) {
 647                 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
 648                 MonoDebugMethodInfo *minfo;
 649                 GPtrArray *source_file_list;
 650
 651                 // FIXME: Free stuff
 652                 minfo = mono_debug_lookup_method (info->method);
 653                 if (!minfo)
 654                         continue;
 655
 656                 mono_debug_get_seq_points (minfo, NULL, &source_file_list, NULL, NULL, NULL);
 657                 for (i = 0; i < source_file_list->len; ++i) {
 658                         MonoDebugSourceInfo *sinfo = (MonoDebugSourceInfo *)g_ptr_array_index (source_file_list, i);
 659                         add_line_number_file_name (w, sinfo->source_file, 0, 0);
 660                 }
 661         }
 662
 663         /* Preprocess files */
 664         dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
 665         index_to_dir = g_hash_table_new (NULL, NULL);
 666         for (i = 0; i < w->line_number_file_index; ++i) {
 667                 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
 668                 char *copy;
 669                 int dir_index = 0;
 670
 671                 if (g_path_is_absolute (name)) {
 672                         char *dir = g_path_get_dirname (name);
 673
 674                         dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
 675                         if (dir_index == 0) {
 676                                 dir_index = w->line_number_dir_index;
 677                                 w->line_number_dir_index ++;
 678                                 copy = g_strdup (dir);
 679                                 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
 680                                 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
 681                         } else {
 682                                 dir_index --;
 683                         }
 684
 685                         g_free (dir);
 686                 }
 687         }
 688
 689         /* Line number info header */
 690         emit_section_change (w, ".debug_line", 0);
 691         emit_label (w, ".Ldebug_line_section_start");
 692         emit_label (w, ".Ldebug_line_start");
 693         emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
 694         emit_int16 (w, 0x2); /* version */
 695         emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
 696         emit_byte (w, 1); /* minimum_instruction_length */
 697         emit_byte (w, 1); /* default_is_stmt */
 698         emit_byte (w, LINE_BASE); /* line_base */
 699         emit_byte (w, LINE_RANGE); /* line_range */
 700         emit_byte (w, OPCODE_BASE); /* opcode_base */
 701         emit_byte (w, 0); /* standard_opcode_lengths */
 702         emit_byte (w, 1);
 703         emit_byte (w, 1);
 704         emit_byte (w, 1);
 705         emit_byte (w, 1);
 706         emit_byte (w, 0);
 707         emit_byte (w, 0);
 708         emit_byte (w, 0);
 709         emit_byte (w, 1);
 710         emit_byte (w, 0);
 711         emit_byte (w, 0);
 712         emit_byte (w, 1);
 713
 714         /* Includes */
 715         emit_section_change (w, ".debug_line", 0);
 716         for (i = 0; i < w->line_number_dir_index; ++i) {
 717                 char *dir = (char *)g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
 718
 719                 emit_string (w, mono_dwarf_escape_path (dir));
 720         }
 721         /* End of Includes */
 722         emit_byte (w, 0);
 723
 724         /* Files */
 725         for (i = 0; i < w->line_number_file_index; ++i) {
 726                 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
 727                 char *basename = NULL, *dir;
 728                 int dir_index = 0;
 729
 730                 if (g_path_is_absolute (name)) {
 731                         dir = g_path_get_dirname (name);
 732
 733                         dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
 734                         basename = g_path_get_basename (name);
 735                 }
 736
 737                 if (basename)
 738                         emit_string (w, basename);
 739                 else
 740                         emit_string (w, mono_dwarf_escape_path (name));
 741                 emit_uleb128 (w, dir_index);
 742                 emit_byte (w, 0);
 743                 emit_byte (w, 0);
 744         }
 745
 746         /* End of Files */
 747         emit_byte (w, 0);
 748
 749         emit_label (w, ".Ldebug_line_header_end");
 750
 751         /* Emit line number table */
 752         for (l = info_list; l; l = l->next) {
 753                 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
 754                 MonoDebugMethodJitInfo *dmji;
 755
 756                 dmji = mono_debug_find_method (info->method, mono_domain_get ());
 757                 if (!dmji)
 758                         continue;
 759                 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
 760                 mono_debug_free_method_jit_info (dmji);
 761         }
 762         g_slist_free (info_list);
 763
 764         emit_byte (w, 0);
 765         emit_byte (w, 1);
 766         emit_byte (w, DW_LNE_end_sequence);
 767
 768         emit_label (w, ".Ldebug_line_end");
 769 }
 770
 771 /*
 772  * Some assemblers like apple's do not support subsections, so we can't place
 773  * .Ldebug_info_end at the end of the section using subsections. Instead, we
 774  * define it every time something gets added to the .debug_info section.
 775  * The apple assember seems to use the last definition.
 776  */
 777 static void
 778 emit_debug_info_end (MonoDwarfWriter *w)
 779 {
 780         /* This doesn't seem to work/required with recent iphone sdk versions */
 781 #if 0
 782         if (!mono_img_writer_subsections_supported (w->w))
 783                 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
 784 #endif
 785 }
 786
 787 void
 788 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
 789 {
 790         char *s, *build_info;
 791         int i;
 792
 793         if (!w->emit_line) {
 794                 emit_section_change (w, ".debug_line", 0);
 795                 emit_label (w, ".Ldebug_line_section_start");
 796                 emit_label (w, ".Ldebug_line_start");
 797         }
 798
 799         w->cie_program = base_unwind_program;
 800
 801         emit_section_change (w, ".debug_abbrev", 0);
 802         emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
 803                                            compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
 804         emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
 805                                            subprogram_attr, G_N_ELEMENTS (subprogram_attr));
 806         emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
 807                                            param_attr, G_N_ELEMENTS (param_attr));
 808         emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
 809                                            param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
 810         emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
 811                                            base_type_attr, G_N_ELEMENTS (base_type_attr));
 812         emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
 813                                            struct_type_attr, G_N_ELEMENTS (struct_type_attr));
 814         emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
 815                                            struct_type_attr, G_N_ELEMENTS (struct_type_attr));
 816         emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
 817                                            data_member_attr, G_N_ELEMENTS (data_member_attr));
 818         emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
 819                                            typedef_attr, G_N_ELEMENTS (typedef_attr));
 820         emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
 821                                            enum_type_attr, G_N_ELEMENTS (enum_type_attr));
 822         emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
 823                                            enumerator_attr, G_N_ELEMENTS (enumerator_attr));
 824         emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
 825                                            namespace_attr, G_N_ELEMENTS (namespace_attr));
 826         emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
 827                                            variable_attr, G_N_ELEMENTS (variable_attr));
 828         emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
 829                                            variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
 830         emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
 831                                            pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
 832         emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
 833                                            reference_type_attr, G_N_ELEMENTS (reference_type_attr));
 834         emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
 835                                            inheritance_attr, G_N_ELEMENTS (inheritance_attr));
 836         emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
 837                                            tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
 838         emit_byte (w, 0);
 839
 840         emit_section_change (w, ".debug_info", 0);
 841         emit_label (w, ".Ldebug_info_start");
 842         emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
 843         emit_label (w, ".Ldebug_info_begin");
 844         emit_int16 (w, 0x2); /* DWARF version 2 */
 845         emit_int32 (w, 0); /* .debug_abbrev offset */
 846         emit_byte (w, sizeof (gpointer)); /* address size */
 847
 848         /* Compilation unit */
 849         emit_uleb128 (w, ABBREV_COMPILE_UNIT);
 850         build_info = mono_get_runtime_build_info ();
 851         s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
 852         emit_string (w, s);
 853         g_free (build_info);
 854         g_free (s);
 855         emit_string (w, cu_name);
 856         emit_string (w, "");
 857         emit_byte (w, DW_LANG_C);
 858         emit_pointer_value (w, 0);
 859         emit_pointer_value (w, 0);
 860         /* offset into .debug_line section */
 861         emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
 862
 863         /* Base types */
 864         for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
 865                 emit_label (w, basic_types [i].die_name);
 866                 emit_uleb128 (w, ABBREV_BASE_TYPE);
 867                 emit_byte (w, basic_types [i].size);
 868                 emit_byte (w, basic_types [i].encoding);
 869                 emit_string (w, basic_types [i].name);
 870         }
 871
 872         emit_debug_info_end (w);
 873
 874         /* debug_loc section */
 875         emit_section_change (w, ".debug_loc", 0);
 876         emit_label (w, ".Ldebug_loc_start");
 877
 878         emit_cie (w);
 879 }
 880
 881 /*
 882  * mono_dwarf_writer_close:
 883  *
 884  *   Finalize the emitted debugging info.
 885  */
 886 void
 887 mono_dwarf_writer_close (MonoDwarfWriter *w)
 888 {
 889         emit_section_change (w, ".debug_info", 0);
 890         emit_byte (w, 0); /* close COMPILE_UNIT */
 891         emit_label (w, ".Ldebug_info_end");
 892
 893         if (w->emit_line)
 894                 emit_all_line_number_info (w);
 895 }
 896
 897 static void emit_type (MonoDwarfWriter *w, MonoType *t);
 898 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
 899
 900 static const char*
 901 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
 902 {
 903         GHashTable *cache;
 904
 905         if (vtype)
 906                 cache = w->class_to_vtype_die;
 907         else
 908                 cache = w->class_to_die;
 909
 910         return (const char *)g_hash_table_lookup (cache, klass);
 911 }
 912
 913 /* Returns the local symbol pointing to the emitted debug info */
 914 static char*
 915 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
 916 {
 917         char *die, *pointer_die, *reference_die;
 918         char *full_name, *p;
 919         gpointer iter;
 920         MonoClassField *field;
 921         const char *fdie;
 922         int k;
 923         gboolean emit_namespace = FALSE, has_children;
 924         GHashTable *cache;
 925
 926         if (vtype)
 927                 cache = w->class_to_vtype_die;
 928         else
 929                 cache = w->class_to_die;
 930
 931         die = (char *)g_hash_table_lookup (cache, klass);
 932         if (die)
 933                 return die;
 934
 935         if (!((klass->byval_arg.type == MONO_TYPE_CLASS) || (klass->byval_arg.type == MONO_TYPE_OBJECT) || klass->byval_arg.type == MONO_TYPE_GENERICINST || klass->enumtype || (klass->byval_arg.type == MONO_TYPE_VALUETYPE && vtype) ||
 936                   (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
 937                 return NULL;
 938
 939         /*
 940          * FIXME: gdb can't handle namespaces in languages it doesn't know about.
 941          */
 942         /*
 943         if (klass->name_space && klass->name_space [0] != '\0')
 944                 emit_namespace = TRUE;
 945         */
 946         if (emit_namespace) {
 947                 emit_uleb128 (w, ABBREV_NAMESPACE);
 948                 emit_string (w, klass->name_space);
 949         }
 950
 951         full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
 952         /*
 953          * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
 954          * to separate components.
 955          */
 956         for (p = full_name; *p; p ++)
 957                 if (*p == '.')
 958                         *p = '_';
 959
 960         die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
 961         pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
 962         reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
 963         w->tdie_index ++;
 964
 965         g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
 966         g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
 967         g_hash_table_insert (cache, klass, die);
 968
 969         if (klass->enumtype) {
 970                 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
 971
 972                 emit_label (w, die);
 973
 974                 emit_uleb128 (w, ABBREV_ENUM_TYPE);
 975                 emit_string (w, full_name);
 976                 emit_uleb128 (w, size);
 977                 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
 978                         if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
 979                                 break;
 980                 g_assert (k < G_N_ELEMENTS (basic_types));
 981                 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
 982
 983                 /* Emit enum values */
 984                 iter = NULL;
 985                 while ((field = mono_class_get_fields (klass, &iter))) {
 986                         const char *p;
 987                         MonoTypeEnum def_type;
 988
 989                         if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC))
 990                                 continue;
 991                         if (mono_field_is_deleted (field))
 992                                 continue;
 993
 994                         emit_uleb128 (w, ABBREV_ENUMERATOR);
 995                         emit_string (w, mono_field_get_name (field));
 996
 997                         p = mono_class_get_field_default_value (field, &def_type);
 998                         /* len = */ mono_metadata_decode_blob_size (p, &p);
 999                         switch (mono_class_enum_basetype (klass)->type) {
1000                         case MONO_TYPE_U1:
1001                         case MONO_TYPE_I1:
1002                         case MONO_TYPE_BOOLEAN:
1003                                 emit_sleb128 (w, *p);
1004                                 break;
1005                         case MONO_TYPE_U2:
1006                         case MONO_TYPE_I2:
1007                         case MONO_TYPE_CHAR:
1008                                 emit_sleb128 (w, read16 (p));
1009                                 break;
1010                         case MONO_TYPE_U4:
1011                         case MONO_TYPE_I4:
1012                                 emit_sleb128 (w, read32 (p));
1013                                 break;
1014                         case MONO_TYPE_U8:
1015                         case MONO_TYPE_I8:
1016                                 emit_sleb128 (w, read64 (p));
1017                                 break;
1018                         case MONO_TYPE_I:
1019                         case MONO_TYPE_U:
1020 #if SIZEOF_VOID_P == 8
1021                                 emit_sleb128 (w, read64 (p));
1022 #else
1023                                 emit_sleb128 (w, read32 (p));
1024 #endif
1025                                 break;
1026                         default:
1027                                 g_assert_not_reached ();
1028                         }
1029                 }
1030
1031                 has_children = TRUE;
1032         } else {
1033                 guint8 buf [128];
1034                 guint8 *p;
1035                 char *parent_die;
1036
1037                 if (klass->parent)
1038                         parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1039                 else
1040                         parent_die = NULL;
1041
1042                 /* Emit field types */
1043                 iter = NULL;
1044                 while ((field = mono_class_get_fields (klass, &iter))) {
1045                         if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1046                                 continue;
1047
1048                         emit_type (w, field->type);
1049                 }
1050
1051                 iter = NULL;
1052                 has_children = parent_die || mono_class_get_fields (klass, &iter);
1053
1054                 emit_label (w, die);
1055
1056                 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1057                 emit_string (w, full_name);
1058                 emit_uleb128 (w, klass->instance_size);
1059
1060                 if (parent_die) {
1061                         emit_uleb128 (w, ABBREV_INHERITANCE);
1062                         emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1063
1064                         p = buf;
1065                         *p ++= DW_OP_plus_uconst;
1066                         encode_uleb128 (0, p, &p);
1067                         emit_byte (w, p - buf);
1068                         emit_bytes (w, buf, p - buf);
1069                 }
1070
1071                 /* Emit fields */
1072                 iter = NULL;
1073                 while ((field = mono_class_get_fields (klass, &iter))) {
1074                         if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1075                                 continue;
1076
1077                         fdie = get_type_die (w, field->type);
1078                         if (fdie) {
1079                                 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1080                                 emit_string (w, field->name);
1081                                 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1082                                 /* location */
1083                                 p = buf;
1084                                 *p ++= DW_OP_plus_uconst;
1085                                 if (klass->valuetype && vtype)
1086                                         encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1087                                 else
1088                                         encode_uleb128 (field->offset, p, &p);
1089
1090                                 emit_byte (w, p - buf);
1091                                 emit_bytes (w, buf, p - buf);
1092                         }
1093                 }
1094         }
1095
1096         /* Type end */
1097         if (has_children)
1098                 emit_uleb128 (w, 0x0);
1099
1100         /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1101         emit_uleb128 (w, ABBREV_TYPEDEF);
1102         emit_string (w, full_name);
1103         emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1104
1105         /* Add a pointer type */
1106         emit_label (w, pointer_die);
1107
1108         emit_uleb128 (w, ABBREV_POINTER_TYPE);
1109         emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1110
1111         /* Add a reference type */
1112         emit_label (w, reference_die);
1113
1114         emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1115         emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1116
1117         g_free (full_name);
1118
1119         if (emit_namespace) {
1120                 /* Namespace end */
1121                 emit_uleb128 (w, 0x0);
1122         }
1123
1124         return die;
1125 }
1126
1127 static gboolean base_types_emitted [64];
1128
1129 static const char*
1130 get_type_die (MonoDwarfWriter *w, MonoType *t)
1131 {
1132         MonoClass *klass = mono_class_from_mono_type (t);
1133         int j;
1134         const char *tdie;
1135
1136         if (t->byref) {
1137                 if (t->type == MONO_TYPE_VALUETYPE) {
1138                         tdie = (const char *)g_hash_table_lookup (w->class_to_pointer_die, klass);
1139                 }
1140                 else {
1141                         tdie = get_class_die (w, klass, FALSE);
1142                         /* Should return a pointer type to a reference */
1143                 }
1144                 // FIXME:
1145                 t = &mono_defaults.int_class->byval_arg;
1146         }
1147         for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1148                 if (basic_types [j].type == t->type)
1149                         break;
1150         if (j < G_N_ELEMENTS (basic_types)) {
1151                 tdie = basic_types [j].die_name;
1152         } else {
1153                 switch (t->type) {
1154                 case MONO_TYPE_CLASS:
1155                         tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1156                         //tdie = ".LDIE_OBJECT";
1157                         break;
1158                 case MONO_TYPE_ARRAY:
1159                         tdie = ".LDIE_OBJECT";
1160                         break;
1161                 case MONO_TYPE_VALUETYPE:
1162                         if (klass->enumtype)
1163                                 tdie = get_class_die (w, klass, FALSE);
1164                         else
1165                                 tdie = ".LDIE_I4";
1166                         break;
1167                 case MONO_TYPE_GENERICINST:
1168                         if (!MONO_TYPE_ISSTRUCT (t)) {
1169                                 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1170                         } else {
1171                                 tdie = ".LDIE_I4";
1172                         }
1173                         break;
1174                 case MONO_TYPE_PTR:
1175                         tdie = ".LDIE_I";
1176                         break;
1177                 default:
1178                         tdie = ".LDIE_I4";
1179                         break;
1180                 }
1181         }
1182
1183         g_assert (tdie);
1184
1185         return tdie;
1186 }
1187
1188 static void
1189 emit_type (MonoDwarfWriter *w, MonoType *t)
1190 {
1191         MonoClass *klass = mono_class_from_mono_type (t);
1192         int j;
1193         const char *tdie;
1194
1195         if (t->byref) {
1196                 if (t->type == MONO_TYPE_VALUETYPE) {
1197                         tdie = emit_class_dwarf_info (w, klass, TRUE);
1198                         if (tdie)
1199                                 return;
1200                 }
1201                 else {
1202                         emit_class_dwarf_info (w, klass, FALSE);
1203                 }
1204                 // FIXME:
1205                 t = &mono_defaults.int_class->byval_arg;
1206         }
1207         for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1208                 if (basic_types [j].type == t->type)
1209                         break;
1210         if (j < G_N_ELEMENTS (basic_types)) {
1211                 /* Emit a boxed version of base types */
1212                 if (j < 64 && !base_types_emitted [j]) {
1213                         emit_class_dwarf_info (w, klass, FALSE);
1214                         base_types_emitted [j] = TRUE;
1215                 }
1216         } else {
1217                 switch (t->type) {
1218                 case MONO_TYPE_CLASS:
1219                         emit_class_dwarf_info (w, klass, FALSE);
1220                         break;
1221                 case MONO_TYPE_ARRAY:
1222                         break;
1223                 case MONO_TYPE_VALUETYPE:
1224                         if (klass->enumtype)
1225                                 emit_class_dwarf_info (w, klass, FALSE);
1226                         break;
1227                 case MONO_TYPE_GENERICINST:
1228                         if (!MONO_TYPE_ISSTRUCT (t))
1229                                 emit_class_dwarf_info (w, klass, FALSE);
1230                         break;
1231                 case MONO_TYPE_PTR:
1232                         break;
1233                 default:
1234                         break;
1235                 }
1236         }
1237 }
1238
1239 static void
1240 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1241 {
1242         const char *tdie;
1243
1244         tdie = get_type_die (w, t);
1245
1246         emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1247 }
1248
1249 static void
1250 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1251 {
1252         /* location */
1253         /* FIXME: This needs a location list, since the args can go from reg->stack */
1254         if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1255                 /* gdb treats this as optimized out */
1256         } else if (ins->opcode == OP_REGVAR) {
1257                 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1258                 p ++;
1259         } else if (ins->opcode == OP_REGOFFSET) {
1260                 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1261                 encode_sleb128 (ins->inst_offset, p, &p);
1262         } else {
1263                 // FIXME:
1264                 *p ++ = DW_OP_reg0;
1265         }
1266
1267         *endp = p;
1268 }
1269
1270 static void
1271 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1272                           guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1273                           guint8 *expr, guint32 expr_len)
1274 {
1275         char label [128];
1276
1277         emit_push_section (w, ".debug_loc", 0);
1278         sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1279         emit_label (w, label);
1280
1281         emit_pointer_value (w, loclist_begin_addr);
1282         emit_pointer_value (w, loclist_end_addr);
1283         emit_byte (w, expr_len % 256);
1284         emit_byte (w, expr_len / 256);
1285         emit_bytes (w, expr, expr_len);
1286
1287         emit_pointer_value (w, NULL);
1288         emit_pointer_value (w, NULL);
1289
1290         emit_pop_section (w);
1291         emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1292 }
1293
1294 /*
1295  * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1296  * it is a public header.
1297  */
1298 static const guint8 *token_handler_ip;
1299
1300 static char*
1301 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1302 {
1303         MonoError error;
1304         char *res, *desc;
1305         MonoMethod *cmethod;
1306         MonoClass *klass;
1307         MonoClassField *field;
1308         gpointer data = NULL;
1309
1310         if (method->wrapper_type)
1311                 data = mono_method_get_wrapper_data (method, token);
1312
1313         switch (*token_handler_ip) {
1314         case CEE_ISINST:
1315         case CEE_CASTCLASS:
1316         case CEE_LDELEMA:
1317                 if (method->wrapper_type) {
1318                         klass = (MonoClass *)data;
1319                 } else {
1320                         klass = mono_class_get_checked (method->klass->image, token, &error);
1321                         g_assert (mono_error_ok (&error)); /* FIXME error handling */
1322                 }
1323                 res = g_strdup_printf ("<%s>", klass->name);
1324                 break;
1325         case CEE_NEWOBJ:
1326         case CEE_CALL:
1327         case CEE_CALLVIRT:
1328                 if (method->wrapper_type) {
1329                         cmethod = (MonoMethod *)data;
1330                 } else {
1331                         MonoError error;
1332                         cmethod = mono_get_method_checked (method->klass->image, token, NULL, NULL, &error);
1333                         if (!cmethod)
1334                                 g_error ("Could not load method due to %s", mono_error_get_message (&error)); /* FIXME don't swallow the error */
1335                 }
1336                 desc = mono_method_full_name (cmethod, TRUE);
1337                 res = g_strdup_printf ("<%s>", desc);
1338                 g_free (desc);
1339                 break;
1340         case CEE_CALLI:
1341                 if (method->wrapper_type) {
1342                         desc = mono_signature_get_desc ((MonoMethodSignature *)data, FALSE);
1343                         res = g_strdup_printf ("<%s>", desc);
1344                         g_free (desc);
1345                 } else {
1346                         res = g_strdup_printf ("<0x%08x>", token);
1347                 }
1348                 break;
1349         case CEE_LDFLD:
1350         case CEE_LDSFLD:
1351         case CEE_STFLD:
1352         case CEE_STSFLD:
1353                 if (method->wrapper_type) {
1354                         field = (MonoClassField *)data;
1355                 } else {
1356                         field = mono_field_from_token_checked (method->klass->image, token, &klass, NULL,  &error);
1357                         g_assert (mono_error_ok (&error)); /* FIXME error handling */
1358                 }
1359                 desc = mono_field_full_name (field);
1360                 res = g_strdup_printf ("<%s>", desc);
1361                 g_free (desc);
1362                 break;
1363         default:
1364                 res = g_strdup_printf ("<0x%08x>", token);
1365                 break;
1366         }
1367
1368         return res;
1369 }
1370
1371 /*
1372  * disasm_ins:
1373  *
1374  *   Produce a disassembled form of the IL instruction at IP. This is an extension
1375  * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1376  * CEE_MONO_ opcodes.
1377  */
1378 static char*
1379 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1380 {
1381         MonoError error;
1382         char *dis;
1383         MonoDisHelper dh;
1384         MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1385         mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1386
1387         memset (&dh, 0, sizeof (dh));
1388         dh.newline = "";
1389         dh.label_format = "IL_%04x: ";
1390         dh.label_target = "IL_%04x";
1391         dh.tokener = token_handler;
1392
1393         token_handler_ip = ip;
1394         if (*ip == MONO_CUSTOM_PREFIX) {
1395                 guint32 token;
1396                 gpointer data;
1397
1398                 switch (ip [1]) {
1399                 case CEE_MONO_ICALL: {
1400                         MonoJitICallInfo *info;
1401
1402                         token = read32 (ip + 2);
1403                         data = mono_method_get_wrapper_data (method, token);
1404                         info = mono_find_jit_icall_by_addr (data);
1405                         g_assert (info);
1406
1407                         dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1408                         ip += 6;
1409                         break;
1410                 }
1411                 case CEE_MONO_CLASSCONST: {
1412                         token = read32 (ip + 2);
1413                         data = mono_method_get_wrapper_data (method, token);
1414
1415                         dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1416                         ip += 6;
1417                         break;
1418                 }
1419                 default:
1420                         dis = mono_disasm_code_one (&dh, method, ip, &ip);
1421                 }
1422         } else {
1423                 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1424         }
1425         token_handler_ip = NULL;
1426
1427         *endip = ip;
1428         mono_metadata_free_mh (header);
1429         return dis;
1430 }
1431
1432 static gint32
1433 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1434                                                 guint32 native_offset)
1435 {
1436         int i;
1437
1438         if (!jit->line_numbers)
1439                 return -1;
1440
1441         for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1442                 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1443
1444                 if (lne.native_offset <= native_offset)
1445                         return lne.il_offset;
1446         }
1447
1448         return -1;
1449 }
1450
1451 static int max_special_addr_diff = 0;
1452
1453 static inline void
1454 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1455 {
1456         gint64 opcode = 0;
1457
1458         /* Use a special opcode if possible */
1459         if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1460                 if (max_special_addr_diff == 0)
1461                         max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1462
1463                 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1464                         emit_byte (w, DW_LNS_const_add_pc);
1465                         addr_diff -= max_special_addr_diff;
1466                 }
1467
1468                 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1469                 if (opcode > 255)
1470                         opcode = 0;
1471         }
1472
1473         if (opcode != 0) {
1474                 emit_byte (w, opcode);
1475         } else {
1476                 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1477                 emit_byte (w, DW_LNS_advance_line);
1478                 emit_sleb128 (w, line_diff);
1479                 emit_byte (w, DW_LNS_advance_pc);
1480                 emit_sleb128 (w, addr_diff);
1481                 emit_byte (w, DW_LNS_copy);
1482         }
1483 }
1484
1485 static gint
1486 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1487 {
1488         if (a->native_offset == b->native_offset)
1489                 return a->il_offset - b->il_offset;
1490         else
1491                 return a->native_offset - b->native_offset;
1492 }
1493
1494 static void
1495 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1496                                            char *start_symbol, char *end_symbol,
1497                                            guint8 *code, guint32 code_size,
1498                                            MonoDebugMethodJitInfo *debug_info)
1499 {
1500         MonoError error;
1501         guint32 prev_line = 0;
1502         guint32 prev_native_offset = 0;
1503         int i, file_index, il_offset, prev_il_offset;
1504         gboolean first = TRUE;
1505         MonoDebugSourceLocation *loc;
1506         char *prev_file_name = NULL;
1507         MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1508         MonoDebugMethodInfo *minfo;
1509         MonoDebugLineNumberEntry *ln_array;
1510         int *native_to_il_offset = NULL;
1511
1512         mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1513
1514         if (!w->emit_line) {
1515                 mono_metadata_free_mh (header);
1516                 return;
1517         }
1518
1519         minfo = mono_debug_lookup_method (method);
1520
1521         /* Compute the native->IL offset mapping */
1522
1523         g_assert (code_size);
1524
1525         ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1526         memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1527
1528         qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (int (*)(const void *, const void *))compare_lne);
1529
1530         native_to_il_offset = g_new0 (int, code_size + 1);
1531
1532         for (i = 0; i < debug_info->num_line_numbers; ++i) {
1533                 int j;
1534                 MonoDebugLineNumberEntry *lne = &ln_array [i];
1535
1536                 if (i == 0) {
1537                         for (j = 0; j < lne->native_offset; ++j)
1538                                 native_to_il_offset [j] = -1;
1539                 }
1540
1541                 if (i < debug_info->num_line_numbers - 1) {
1542                         MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1543
1544                         for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1545                                 native_to_il_offset [j] = lne->il_offset;
1546                 } else {
1547                         for (j = lne->native_offset; j < code_size; ++j)
1548                                 native_to_il_offset [j] = lne->il_offset;
1549                 }
1550         }
1551         g_free (ln_array);
1552
1553         prev_line = 1;
1554         prev_il_offset = -1;
1555
1556         w->cur_file_index = -1;
1557         for (i = 0; i < code_size; ++i) {
1558                 int line_diff, addr_diff;
1559
1560                 if (!minfo)
1561                         continue;
1562
1563                 if (!debug_info->line_numbers)
1564                         continue;
1565
1566                 if (native_to_il_offset)
1567                         il_offset = native_to_il_offset [i];
1568                 else
1569                         il_offset = il_offset_from_address (method, debug_info, i);
1570                 /*
1571                 il_offset = il_offset_from_address (method, debug_info, i);
1572
1573                 g_assert (il_offset == native_to_il_offset [i]);
1574                 */
1575
1576                 il_offset = native_to_il_offset [i];
1577                 if (il_offset < 0)
1578                         continue;
1579
1580                 if (il_offset == prev_il_offset)
1581                         continue;
1582
1583                 prev_il_offset = il_offset;
1584
1585                 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1586                 if (!loc)
1587                         continue;
1588                 if (!loc->source_file) {
1589                         mono_debug_symfile_free_location (loc);
1590                         continue;
1591                 }
1592
1593                 line_diff = (gint32)loc->row - (gint32)prev_line;
1594                 addr_diff = i - prev_native_offset;
1595
1596                 if (first) {
1597                         emit_section_change (w, ".debug_line", 0);
1598
1599                         emit_byte (w, 0);
1600                         emit_byte (w, sizeof (gpointer) + 1);
1601                         emit_byte (w, DW_LNE_set_address);
1602                         if (start_symbol)
1603                                 emit_pointer_unaligned (w, start_symbol);
1604                         else
1605                                 emit_pointer_value (w, code);
1606                         first = FALSE;
1607                 }
1608
1609                 if (loc->row != prev_line) {
1610                         if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1611                                 /* Add an entry to the file table */
1612                                 /* FIXME: Avoid duplicates */
1613                                 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1614                                 g_free (prev_file_name);
1615                                 prev_file_name = g_strdup (loc->source_file);
1616
1617                                 if (w->cur_file_index != file_index) {
1618                                         emit_byte (w, DW_LNS_set_file);
1619                                         emit_uleb128 (w, file_index);
1620                                         emit_byte (w, DW_LNS_copy);
1621                                         w->cur_file_index = file_index;
1622                                 }
1623                         }
1624                 }
1625
1626                 if (loc->row != prev_line) {
1627                         if (prev_native_offset == 0)
1628                                 emit_byte (w, DW_LNE_set_prologue_end);
1629
1630                         //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1631                         emit_advance_op (w, line_diff, addr_diff);
1632
1633                         prev_line = loc->row;
1634                         prev_native_offset = i;
1635                 }
1636
1637                 mono_debug_symfile_free_location (loc);
1638                 first = FALSE;
1639         }
1640
1641         g_free (native_to_il_offset);
1642         g_free (prev_file_name);
1643
1644         if (!first) {
1645                 emit_byte (w, DW_LNS_advance_pc);
1646                 emit_sleb128 (w, code_size - prev_native_offset);
1647                 emit_byte (w, DW_LNS_copy);
1648
1649                 emit_byte (w, 0);
1650                 emit_byte (w, 1);
1651                 emit_byte (w, DW_LNE_end_sequence);
1652         } else if (!start_symbol) {
1653                 /* No debug info, XDEBUG mode */
1654                 char *name, *dis;
1655                 const guint8 *ip = header->code;
1656                 int prev_line, prev_native_offset;
1657                 int *il_to_line;
1658
1659                 /*
1660                  * Emit the IL code into a temporary file and emit line number info
1661                  * referencing that file.
1662                  */
1663
1664                 name = mono_method_full_name (method, TRUE);
1665                 fprintf (w->il_file, "// %s\n", name);
1666                 w->il_file_line_index ++;
1667                 g_free (name);
1668
1669                 il_to_line = g_new0 (int, header->code_size);
1670
1671                 emit_section_change (w, ".debug_line", 0);
1672                 emit_byte (w, 0);
1673                 emit_byte (w, sizeof (gpointer) + 1);
1674                 emit_byte (w, DW_LNE_set_address);
1675                 emit_pointer_value (w, code);
1676
1677                 // FIXME: Optimize this
1678                 while (ip < header->code + header->code_size) {
1679                         int il_offset = ip - header->code;
1680
1681                         /* Emit IL */
1682                         w->il_file_line_index ++;
1683
1684                         dis = disasm_ins (method, ip, &ip);
1685                         fprintf (w->il_file, "%s\n", dis);
1686                         g_free (dis);
1687
1688                         il_to_line [il_offset] = w->il_file_line_index;
1689                 }
1690
1691                 /* Emit line number info */
1692                 prev_line = 1;
1693                 prev_native_offset = 0;
1694                 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1695                         MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1696                         int line;
1697
1698                         if (lne->il_offset >= header->code_size)
1699                                 continue;
1700                         line = il_to_line [lne->il_offset];
1701                         if (!line) {
1702                                 /*
1703                                  * This seems to happen randomly, it looks like il_offset points
1704                                  * into the middle of an instruction.
1705                                  */
1706                                 continue;
1707                                 /*
1708                                 printf ("%s\n", mono_method_full_name (method, TRUE));
1709                                 printf ("%d %d\n", lne->il_offset, header->code_size);
1710                                 g_assert (line);
1711                                 */
1712                         }
1713
1714                         if (line - prev_line != 0) {
1715                                 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1716
1717                                 prev_line = line;
1718                                 prev_native_offset = lne->native_offset;
1719                         }
1720                 }
1721
1722                 emit_byte (w, DW_LNS_advance_pc);
1723                 emit_sleb128 (w, code_size - prev_native_offset);
1724                 emit_byte (w, DW_LNS_copy);
1725
1726                 emit_byte (w, 0);
1727                 emit_byte (w, 1);
1728                 emit_byte (w, DW_LNE_end_sequence);
1729
1730                 fflush (w->il_file);
1731                 g_free (il_to_line);
1732         }
1733         mono_metadata_free_mh (header);
1734 }
1735
1736 static MonoMethodVar*
1737 find_vmv (MonoCompile *cfg, MonoInst *ins)
1738 {
1739         int j;
1740
1741         if (cfg->varinfo) {
1742                 for (j = 0; j < cfg->num_varinfo; ++j) {
1743                         if (cfg->varinfo [j] == ins)
1744                                 break;
1745                 }
1746
1747                 if (j < cfg->num_varinfo) {
1748                         return MONO_VARINFO (cfg, j);
1749                 }
1750         }
1751
1752         return NULL;
1753 }
1754
1755 void
1756 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1757                                                            guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1758 {
1759         MonoError error;
1760         char *name;
1761         MonoMethodSignature *sig;
1762         MonoMethodHeader *header;
1763         char **names;
1764         MonoDebugLocalsInfo *locals_info;
1765         MonoDebugMethodInfo *minfo;
1766         MonoDebugSourceLocation *loc = NULL;
1767         int i;
1768         guint8 buf [128];
1769         guint8 *p;
1770
1771         emit_section_change (w, ".debug_info", 0);
1772
1773         sig = mono_method_signature (method);
1774         header = mono_method_get_header_checked (method, &error);
1775         mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1776
1777         /* Parameter types */
1778         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1779                 MonoType *t;
1780
1781                 if (i == 0 && sig->hasthis) {
1782                         if (method->klass->valuetype)
1783                                 t = &method->klass->this_arg;
1784                         else
1785                                 t = &method->klass->byval_arg;
1786                 } else {
1787                         t = sig->params [i - sig->hasthis];
1788                 }
1789
1790                 emit_type (w, t);
1791         }
1792         //emit_type (w, &mono_defaults.int32_class->byval_arg);
1793
1794         /* Local types */
1795         for (i = 0; i < header->num_locals; ++i) {
1796                 emit_type (w, header->locals [i]);
1797         }
1798
1799         minfo = mono_debug_lookup_method (method);
1800         if (minfo)
1801                 loc = mono_debug_symfile_lookup_location (minfo, 0);
1802
1803         /* Subprogram */
1804         names = g_new0 (char *, sig->param_count);
1805         mono_method_get_param_names (method, (const char **) names);
1806
1807         emit_uleb128 (w, ABBREV_SUBPROGRAM);
1808         /* DW_AT_name */
1809         name = mono_method_full_name (method, FALSE);
1810         emit_escaped_string (w, name);
1811         /* DW_AT_MIPS_linkage_name */
1812         if (linkage_name)
1813                 emit_string (w, linkage_name);
1814         else
1815                 emit_string (w, "");
1816         /* DW_AT_decl_file/DW_AT_decl_line */
1817         if (loc) {
1818                 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1819                 emit_uleb128 (w, file_index + 1);
1820                 emit_uleb128 (w, loc->row);
1821
1822                 mono_debug_symfile_free_location (loc);
1823                 loc = NULL;
1824         } else {
1825                 emit_uleb128 (w, 0);
1826                 emit_uleb128 (w, 0);
1827         }
1828 #ifndef TARGET_IOS
1829         emit_string (w, name);
1830 #endif
1831         g_free (name);
1832         if (start_symbol) {
1833                 emit_pointer_unaligned (w, start_symbol);
1834                 emit_pointer_unaligned (w, end_symbol);
1835         } else {
1836                 emit_pointer_value (w, code);
1837                 emit_pointer_value (w, code + code_size);
1838         }
1839         /* frame_base */
1840         emit_byte (w, 2);
1841         emit_byte (w, DW_OP_breg6);
1842         emit_byte (w, 16);
1843
1844         /* Parameters */
1845         for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1846                 MonoInst *arg = args ? args [i] : NULL;
1847                 MonoType *t;
1848                 const char *pname;
1849                 char pname_buf [128];
1850                 MonoMethodVar *vmv = NULL;
1851                 gboolean need_loclist = FALSE;
1852
1853                 vmv = find_vmv (cfg, arg);
1854                 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1855                         need_loclist = TRUE;
1856
1857                 if (i == 0 && sig->hasthis) {
1858                         if (method->klass->valuetype)
1859                                 t = &method->klass->this_arg;
1860                         else
1861                                 t = &method->klass->byval_arg;
1862                         pname = "this";
1863                 } else {
1864                         t = sig->params [i - sig->hasthis];
1865                         pname = names [i - sig->hasthis];
1866                 }
1867
1868                 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1869                 /* name */
1870                 if (pname[0] == '\0') {
1871                         sprintf (pname_buf, "param%d", i - sig->hasthis);
1872                         pname = pname_buf;
1873                 }
1874                 emit_string (w, pname);
1875                 /* type */
1876                 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1877                         emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1878                 else
1879                         emit_var_type (w, t);
1880
1881                 p = buf;
1882                 encode_var_location (w, arg, p, &p);
1883                 if (need_loclist) {
1884                         vmv->live_range_start = 0;
1885                         if (vmv->live_range_end == 0)
1886                                 /* FIXME: Uses made in calls are not recorded */
1887                                 vmv->live_range_end = code_size;
1888                         emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1889                 } else {
1890                         emit_byte (w, p - buf);
1891                         emit_bytes (w, buf, p - buf);
1892                 }
1893         }
1894         g_free (names);
1895
1896         /* Locals */
1897         locals_info = mono_debug_lookup_locals (method);
1898
1899         for (i = 0; i < header->num_locals; ++i) {
1900                 MonoInst *ins = locals [i];
1901                 char name_buf [128];
1902                 int j;
1903                 MonoMethodVar *vmv = NULL;
1904                 gboolean need_loclist = FALSE;
1905                 char *lname;
1906
1907                 /* ins->dreg no longer contains the original vreg */
1908                 vmv = find_vmv (cfg, ins);
1909                 if (code && vmv) {
1910                         if (vmv->live_range_start) {
1911                                 /* This variable has a precise live range */
1912                                 need_loclist = TRUE;
1913                         }
1914                 }
1915
1916                 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1917                 /* name */
1918                 lname = NULL;
1919                 if (locals_info) {
1920                         for (j = 0; j < locals_info->num_locals; ++j)
1921                                 if (locals_info->locals [j].index == i)
1922                                         break;
1923                         if (j < locals_info->num_locals)
1924                                 lname = locals_info->locals [j].name;
1925                 }
1926                 if (lname) {
1927                         emit_string (w, lname);
1928                 } else {
1929                         sprintf (name_buf, "V_%d", i);
1930                         emit_string (w, name_buf);
1931                 }
1932                 /* type */
1933                 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1934                         emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1935                 else
1936                         emit_var_type (w, header->locals [i]);
1937
1938                 p = buf;
1939                 encode_var_location (w, ins, p, &p);
1940
1941                 if (need_loclist) {
1942                         if (vmv->live_range_end == 0)
1943                                 /* FIXME: Uses made in calls are not recorded */
1944                                 vmv->live_range_end = code_size;
1945                         emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1946                 } else {
1947                         emit_byte (w, p - buf);
1948                         emit_bytes (w, buf, p - buf);
1949                 }
1950         }
1951
1952         if (locals_info)
1953                 mono_debug_free_locals (locals_info);
1954
1955         /* Subprogram end */
1956         emit_uleb128 (w, 0x0);
1957
1958         emit_line (w);
1959
1960         emit_debug_info_end (w);
1961
1962         /* Emit unwind info */
1963         if (unwind_info) {
1964                 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1965                 w->fde_index ++;
1966         }
1967
1968         /* Save the information needed to emit the line number info later at once */
1969         /* != could happen when using --regression */
1970         if (debug_info && (debug_info->code_start == code)) {
1971                 MethodLineNumberInfo *info;
1972
1973                 info = g_new0 (MethodLineNumberInfo, 1);
1974                 info->method = method;
1975                 info->start_symbol = g_strdup (start_symbol);
1976                 info->end_symbol = g_strdup (end_symbol);
1977                 info->code = code;
1978                 info->code_size = code_size;
1979                 w->line_info = g_slist_prepend (w->line_info, info);
1980         }
1981
1982         emit_line (w);
1983         mono_metadata_free_mh (header);
1984 }
1985
1986 void
1987 mono_dwarf_writer_emit_trampoline (MonoDwarfWriter *w, const char *tramp_name, char *start_symbol, char *end_symbol, guint8 *code, guint32 code_size, GSList *unwind_info)
1988 {
1989         emit_section_change (w, ".debug_info", 0);
1990
1991         /* Subprogram */
1992         emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
1993         emit_string (w, tramp_name);
1994         emit_pointer_value (w, code);
1995         emit_pointer_value (w, code + code_size);
1996
1997         /* Subprogram end */
1998         emit_uleb128 (w, 0x0);
1999
2000         emit_debug_info_end (w);
2001
2002         /* Emit unwind info */
2003         emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2004         w->fde_index ++;
2005 }
2006
2007 #else /* !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
2008
2009 MONO_EMPTY_SOURCE_FILE (dwarfwriter);
2010
2011 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */