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