2 * dwarfwriter.c: Creation of DWARF debug information
5 * Zoltan Varga (vargaz@gmail.com)
7 * (C) 2008-2009 Novell, Inc.
12 #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
13 #include "dwarfwriter.h"
15 #include <sys/types.h>
22 #include <mono/metadata/mono-endian.h>
23 #include <mono/metadata/debug-mono-symfile.h>
24 #include <mono/utils/mono-compiler.h>
26 #ifndef PLATFORM_WIN32
27 #include <mono/utils/freebsd-elf32.h>
28 #include <mono/utils/freebsd-elf64.h>
31 #include <mono/utils/freebsd-dwarf.h>
33 struct _MonoDwarfWriter
36 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
37 GHashTable *class_to_reference_die;
38 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
39 GHashTable *file_to_index, *dir_to_index;
41 int il_file_line_index, loclist_index;
44 const char *temp_prefix;
45 gboolean emit_line, appending;
49 * mono_dwarf_writer_create:
51 * Create a DWARF writer object. WRITER is the underlying image writer this
52 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
53 * methods which have no line number info. It can be NULL.
54 * If APPENDING is TRUE, the output file will be in assembleable state after each
55 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
56 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
60 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, gboolean appending)
62 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
65 * The appending flag is needed because we use subsections to order things in
66 * the debug info, and:
67 * - apple's assembler doesn't support them
68 * - the binary writer has problems with subsections+alignment
69 * So instead of subsections, we use the _close () function in AOT mode,
70 * which writes out things in order.
75 w->appending = appending;
78 g_assert (img_writer_subsections_supported (w->w));
80 w->fp = img_writer_get_fp (w->w);
81 w->temp_prefix = img_writer_get_temp_label_prefix (w->w);
87 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
92 /* Wrappers around the image writer functions */
95 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
97 img_writer_emit_section_change (w->w, section_name, subsection_index);
101 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
103 img_writer_emit_push_section (w->w, section_name, subsection);
107 emit_pop_section (MonoDwarfWriter *w)
109 img_writer_emit_pop_section (w->w);
113 emit_local_symbol (MonoDwarfWriter *w, const char *name, const char *end_label, gboolean func)
115 img_writer_emit_local_symbol (w->w, name, end_label, func);
119 emit_label (MonoDwarfWriter *w, const char *name)
121 img_writer_emit_label (w->w, name);
125 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
127 img_writer_emit_bytes (w->w, buf, size);
131 emit_string (MonoDwarfWriter *w, const char *value)
133 img_writer_emit_string (w->w, value);
137 emit_line (MonoDwarfWriter *w)
139 img_writer_emit_line (w->w);
143 emit_alignment (MonoDwarfWriter *w, int size)
145 img_writer_emit_alignment (w->w, size);
149 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
151 img_writer_emit_pointer_unaligned (w->w, target);
155 emit_pointer (MonoDwarfWriter *w, const char *target)
157 img_writer_emit_pointer (w->w, target);
161 emit_int16 (MonoDwarfWriter *w, int value)
163 img_writer_emit_int16 (w->w, value);
167 emit_int32 (MonoDwarfWriter *w, int value)
169 img_writer_emit_int32 (w->w, value);
173 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
175 img_writer_emit_symbol_diff (w->w, end, start, offset);
179 emit_zero_bytes (MonoDwarfWriter *w, int num)
181 img_writer_emit_zero_bytes (w->w, num);
185 emit_byte (MonoDwarfWriter *w, guint8 val)
187 img_writer_emit_byte (w->w, val);
190 static G_GNUC_UNUSED void
191 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
194 guint8 b = value & 0x7f;
196 if (value != 0) /* more bytes to come */
202 static G_GNUC_UNUSED void
203 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
206 gboolean negative = (value < 0);
213 /* the following is unnecessary if the
214 * implementation of >>= uses an arithmetic rather
215 * than logical shift for a signed left operand
219 value |= - ((gint64)1 <<(size - 7));
220 /* sign bit of byte is second high order bit (0x40) */
221 if ((value == 0 && !(byte & 0x40)) ||
222 (value == -1 && (byte & 0x40)))
230 static G_GNUC_UNUSED void
231 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
236 guint8 b = value & 0x7f;
238 if (value != 0) /* more bytes to come */
246 static G_GNUC_UNUSED void
247 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
250 gboolean negative = (value < 0);
258 /* the following is unnecessary if the
259 * implementation of >>= uses an arithmetic rather
260 * than logical shift for a signed left operand
264 value |= - (1 <<(size - 7));
265 /* sign bit of byte is second high order bit (0x40) */
266 if ((value == 0 && !(byte & 0x40)) ||
267 (value == -1 && (byte & 0x40)))
278 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
279 int *attrs, int attrs_len)
283 emit_uleb128 (w, code);
284 emit_uleb128 (w, tag);
285 emit_byte (w, has_child);
287 for (i = 0; i < attrs_len; i++)
288 emit_uleb128 (w, attrs [i]);
294 emit_cie (MonoDwarfWriter *w)
296 emit_section_change (w, ".debug_frame", 0);
298 emit_alignment (w, 8);
301 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
302 emit_label (w, ".Lcie0_start");
303 emit_int32 (w, 0xffffffff); /* CIE id */
304 emit_byte (w, 3); /* version */
305 emit_string (w, ""); /* augmention */
306 emit_sleb128 (w, 1); /* code alignment factor */
307 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
308 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
310 w->cie_program = w->cie_program;
311 if (w->cie_program) {
313 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
314 emit_bytes (w, uw_info, uw_info_len);
318 emit_alignment (w, sizeof (gpointer));
319 emit_label (w, ".Lcie0_end");
323 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
325 gssize val = (gssize)ptr;
326 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
330 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
331 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
339 emit_section_change (w, ".debug_frame", 0);
341 sprintf (symbol1, ".Lfde%d_start", fde_index);
342 sprintf (symbol2, ".Lfde%d_end", fde_index);
343 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
344 emit_label (w, symbol1);
345 emit_int32 (w, 0); /* CIE_pointer */
347 emit_pointer (w, start_symbol); /* initial_location */
349 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
351 g_assert (code_size);
352 emit_int32 (w, code_size);
355 emit_pointer_value (w, code);
356 emit_int32 (w, code_size);
358 #if SIZEOF_VOID_P == 8
359 /* Upper 32 bits of code size */
364 if (w->cie_program) {
365 // FIXME: Check that the ops really begin with the CIE program */
368 for (i = 0; i < g_slist_length (w->cie_program); ++i)
372 /* Convert the list of MonoUnwindOps to the format used by DWARF */
373 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
374 emit_bytes (w, uw_info, uw_info_len);
377 emit_alignment (w, sizeof (mgreg_t));
378 emit_label (w, symbol2);
382 #define ABBREV_COMPILE_UNIT 1
383 #define ABBREV_SUBPROGRAM 2
384 #define ABBREV_PARAM 3
385 #define ABBREV_BASE_TYPE 4
386 #define ABBREV_STRUCT_TYPE 5
387 #define ABBREV_DATA_MEMBER 6
388 #define ABBREV_TYPEDEF 7
389 #define ABBREV_ENUM_TYPE 8
390 #define ABBREV_ENUMERATOR 9
391 #define ABBREV_NAMESPACE 10
392 #define ABBREV_VARIABLE 11
393 #define ABBREV_VARIABLE_LOCLIST 12
394 #define ABBREV_POINTER_TYPE 13
395 #define ABBREV_REFERENCE_TYPE 14
396 #define ABBREV_PARAM_LOCLIST 15
397 #define ABBREV_INHERITANCE 16
398 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
400 static int compile_unit_attr [] = {
401 DW_AT_producer ,DW_FORM_string,
402 DW_AT_name ,DW_FORM_string,
403 DW_AT_comp_dir ,DW_FORM_string,
404 DW_AT_language ,DW_FORM_data1,
405 DW_AT_low_pc ,DW_FORM_addr,
406 DW_AT_high_pc ,DW_FORM_addr,
407 DW_AT_stmt_list ,DW_FORM_data4
410 static int subprogram_attr [] = {
411 DW_AT_name , DW_FORM_string,
412 DW_AT_low_pc , DW_FORM_addr,
413 DW_AT_high_pc , DW_FORM_addr,
414 DW_AT_frame_base , DW_FORM_block1
417 static int param_attr [] = {
418 DW_AT_name, DW_FORM_string,
419 DW_AT_type, DW_FORM_ref4,
420 DW_AT_location, DW_FORM_block1
423 static int param_loclist_attr [] = {
424 DW_AT_name, DW_FORM_string,
425 DW_AT_type, DW_FORM_ref4,
426 DW_AT_location, DW_FORM_data4
429 static int base_type_attr [] = {
430 DW_AT_byte_size, DW_FORM_data1,
431 DW_AT_encoding, DW_FORM_data1,
432 DW_AT_name, DW_FORM_string
435 static int struct_type_attr [] = {
436 DW_AT_name, DW_FORM_string,
437 DW_AT_byte_size, DW_FORM_udata,
440 static int data_member_attr [] = {
441 DW_AT_name, DW_FORM_string,
442 DW_AT_type, DW_FORM_ref4,
443 DW_AT_data_member_location, DW_FORM_block1
446 static int typedef_attr [] = {
447 DW_AT_name, DW_FORM_string,
448 DW_AT_type, DW_FORM_ref4
451 static int pointer_type_attr [] = {
452 DW_AT_type, DW_FORM_ref4,
455 static int reference_type_attr [] = {
456 DW_AT_type, DW_FORM_ref4,
459 static int enum_type_attr [] = {
460 DW_AT_name, DW_FORM_string,
461 DW_AT_byte_size, DW_FORM_udata,
462 DW_AT_type, DW_FORM_ref4,
465 static int enumerator_attr [] = {
466 DW_AT_name, DW_FORM_string,
467 DW_AT_const_value, DW_FORM_sdata,
470 static int namespace_attr [] = {
471 DW_AT_name, DW_FORM_string,
474 static int variable_attr [] = {
475 DW_AT_name, DW_FORM_string,
476 DW_AT_type, DW_FORM_ref4,
477 DW_AT_location, DW_FORM_block1
480 static int variable_loclist_attr [] = {
481 DW_AT_name, DW_FORM_string,
482 DW_AT_type, DW_FORM_ref4,
483 DW_AT_location, DW_FORM_data4
486 static int inheritance_attr [] = {
487 DW_AT_type, DW_FORM_ref4,
488 DW_AT_data_member_location, DW_FORM_block1
491 typedef struct DwarfBasicType {
492 const char *die_name, *name;
498 static DwarfBasicType basic_types [] = {
499 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
500 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
501 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
502 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
503 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
504 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
505 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
506 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
507 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
508 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
509 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
510 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
511 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
512 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
513 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
514 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
515 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
518 /* Constants for encoding line number special opcodes */
519 #define OPCODE_BASE 13
521 #define LINE_RANGE 14
523 /* Subsections of the .debug_line section */
524 #define LINE_SUBSECTION_HEADER 1
525 #define LINE_SUBSECTION_INCLUDES 2
526 #define LINE_SUBSECTION_FILES 3
527 #define LINE_SUBSECTION_DATA 4
528 #define LINE_SUBSECTION_END 5
531 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
532 gint64 last_mod_time, gint64 file_size)
536 char *basename = NULL;
538 if (!w->file_to_index)
539 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
541 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
545 if (g_path_is_absolute (name)) {
546 char *dir = g_path_get_dirname (name);
548 if (!w->dir_to_index)
549 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
551 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
552 if (dir_index == 0) {
553 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
554 emit_string (w, dir);
556 dir_index = ++ w->line_number_dir_index;
557 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
562 basename = g_path_get_basename (name);
567 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
570 emit_string (w, basename);
572 emit_string (w, name);
573 emit_uleb128 (w, dir_index);
577 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
582 index = ++ w->line_number_file_index;
583 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
589 emit_line_number_info_begin (MonoDwarfWriter *w)
591 /* Line number info header */
593 * GAS seems to emit its own data to the end of the first subsection, so we use
594 * subsections 1, 2 etc:
595 * 1 - contains the header
596 * 2 - contains the file names
597 * 3 - contains the end of the header + the data
600 emit_section_change (w, ".debug_line", 0);
601 emit_label (w, ".Ldebug_line_section_start");
602 emit_section_change (w, ".debug_line", LINE_SUBSECTION_HEADER);
603 emit_label (w, ".Ldebug_line_start");
604 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
605 emit_int16 (w, 0x2); /* version */
606 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
607 emit_byte (w, 1); /* minimum_instruction_length */
608 emit_byte (w, 1); /* default_is_stmt */
609 emit_byte (w, LINE_BASE); /* line_base */
610 emit_byte (w, LINE_RANGE); /* line_range */
611 emit_byte (w, OPCODE_BASE); /* opcode_base */
612 emit_byte (w, 0); /* standard_opcode_lengths */
626 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
628 /* End of Includes */
629 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
633 emit_line_number_file_name (w, "xdb.il", 0, 0);
636 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
639 emit_label (w, ".Ldebug_line_header_end");
641 /* Emit this into a separate subsection so it gets placed at the end */
642 emit_section_change (w, ".debug_line", LINE_SUBSECTION_END);
646 emit_byte (w, DW_LNE_end_sequence);
648 emit_label (w, ".Ldebug_line_end");
652 * Some assemblers like apple's do not support subsections, so we can't place
653 * .Ldebug_info_end at the end of the section using subsections. Instead, we
654 * define it every time something gets added to the .debug_info section.
655 * The apple assember seems to use the last definition.
658 emit_debug_info_end (MonoDwarfWriter *w)
660 /* This doesn't seem to work/required with recent iphone sdk versions */
662 if (!img_writer_subsections_supported (w->w))
663 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
668 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, GSList *base_unwind_program)
670 char *s, *build_info;
673 if (!img_writer_subsections_supported (w->w))
674 /* Can't emit line number info without subsections */
675 w->emit_line = FALSE;
679 w->cie_program = base_unwind_program;
681 emit_section_change (w, ".debug_abbrev", 0);
682 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
683 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
684 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
685 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
686 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
687 param_attr, G_N_ELEMENTS (param_attr));
688 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
689 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
690 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
691 base_type_attr, G_N_ELEMENTS (base_type_attr));
692 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
693 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
694 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
695 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
696 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
697 data_member_attr, G_N_ELEMENTS (data_member_attr));
698 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
699 typedef_attr, G_N_ELEMENTS (typedef_attr));
700 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
701 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
702 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
703 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
704 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
705 namespace_attr, G_N_ELEMENTS (namespace_attr));
706 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
707 variable_attr, G_N_ELEMENTS (variable_attr));
708 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
709 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
710 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
711 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
712 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
713 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
714 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
715 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
718 emit_section_change (w, ".debug_info", 0);
719 emit_label (w, ".Ldebug_info_start");
720 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
721 emit_label (w, ".Ldebug_info_begin");
722 emit_int16 (w, 0x2); /* DWARF version 2 */
723 emit_int32 (w, 0); /* .debug_abbrev offset */
724 emit_byte (w, sizeof (gpointer)); /* address size */
726 if (img_writer_subsections_supported (w->w) && w->appending) {
727 /* Emit this into a separate section so it gets placed at the end */
728 emit_section_change (w, ".debug_info", 1);
729 emit_byte (w, 0); /* close COMPILE_UNIT */
730 emit_label (w, ".Ldebug_info_end");
731 emit_section_change (w, ".debug_info", 0);
734 /* Compilation unit */
735 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
736 build_info = mono_get_runtime_build_info ();
737 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
741 emit_string (w, "JITted code");
743 emit_byte (w, DW_LANG_C);
744 emit_pointer_value (w, 0);
745 emit_pointer_value (w, 0);
746 /* offset into .debug_line section */
747 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
750 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
751 emit_label (w, basic_types [i].die_name);
752 emit_uleb128 (w, ABBREV_BASE_TYPE);
753 emit_byte (w, basic_types [i].size);
754 emit_byte (w, basic_types [i].encoding);
755 emit_string (w, basic_types [i].name);
758 emit_debug_info_end (w);
760 /* debug_loc section */
761 emit_section_change (w, ".debug_loc", 0);
762 emit_label (w, ".Ldebug_loc_start");
764 /* debug_line section */
766 * We emit some info even if emit_line is FALSE, as the
767 * apple linker seems to require a .debug_line section.
769 emit_line_number_info_begin (w);
775 * mono_dwarf_writer_close:
777 * Finalize the emitted debugging info.
780 mono_dwarf_writer_close (MonoDwarfWriter *w)
783 emit_section_change (w, ".debug_info", 0);
784 emit_byte (w, 0); /* close COMPILE_UNIT */
785 emit_label (w, ".Ldebug_info_end");
789 static const char* emit_type (MonoDwarfWriter *w, MonoType *t);
791 /* Returns the local symbol pointing to the emitted debug info */
793 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
795 char *die, *pointer_die, *reference_die;
798 MonoClassField *field;
801 gboolean emit_namespace = FALSE, has_children;
805 if (!w->class_to_die)
806 w->class_to_die = g_hash_table_new (NULL, NULL);
807 if (!w->class_to_vtype_die)
808 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
809 if (!w->class_to_pointer_die)
810 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
811 if (!w->class_to_reference_die)
812 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
815 cache = w->class_to_vtype_die;
817 cache = w->class_to_die;
819 die = g_hash_table_lookup (cache, klass);
823 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)))
827 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
830 if (klass->name_space && klass->name_space [0] != '\0')
831 emit_namespace = TRUE;
833 if (emit_namespace) {
834 emit_uleb128 (w, ABBREV_NAMESPACE);
835 emit_string (w, klass->name_space);
838 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
840 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
841 * to separate components.
843 for (p = full_name; *p; p ++)
847 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
848 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
849 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
852 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
853 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
854 g_hash_table_insert (cache, klass, die);
856 if (klass->enumtype) {
857 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
861 emit_uleb128 (w, ABBREV_ENUM_TYPE);
862 emit_string (w, full_name);
863 emit_uleb128 (w, size);
864 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
865 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
867 g_assert (k < G_N_ELEMENTS (basic_types));
868 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
870 /* Emit enum values */
872 while ((field = mono_class_get_fields (klass, &iter))) {
875 MonoTypeEnum def_type;
877 if (strcmp ("value__", mono_field_get_name (field)) == 0)
879 if (mono_field_is_deleted (field))
882 emit_uleb128 (w, ABBREV_ENUMERATOR);
883 emit_string (w, mono_field_get_name (field));
885 p = mono_class_get_field_default_value (field, &def_type);
886 len = mono_metadata_decode_blob_size (p, &p);
887 switch (mono_class_enum_basetype (klass)->type) {
890 case MONO_TYPE_BOOLEAN:
891 emit_sleb128 (w, *p);
896 emit_sleb128 (w, read16 (p));
900 emit_sleb128 (w, read32 (p));
904 emit_sleb128 (w, read64 (p));
908 #if SIZEOF_VOID_P == 8
909 emit_sleb128 (w, read64 (p));
911 emit_sleb128 (w, read32 (p));
915 g_assert_not_reached ();
926 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
930 /* Emit field types */
932 while ((field = mono_class_get_fields (klass, &iter))) {
933 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
936 emit_type (w, field->type);
940 has_children = parent_die || mono_class_get_fields (klass, &iter);
944 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
945 emit_string (w, full_name);
946 emit_uleb128 (w, klass->instance_size);
949 emit_uleb128 (w, ABBREV_INHERITANCE);
950 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
953 *p ++= DW_OP_plus_uconst;
954 encode_uleb128 (0, p, &p);
955 emit_byte (w, p - buf);
956 emit_bytes (w, buf, p - buf);
961 while ((field = mono_class_get_fields (klass, &iter))) {
962 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
965 fdie = emit_type (w, field->type);
967 emit_uleb128 (w, ABBREV_DATA_MEMBER);
968 emit_string (w, field->name);
969 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
972 *p ++= DW_OP_plus_uconst;
973 if (klass->valuetype && vtype)
974 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
976 encode_uleb128 (field->offset, p, &p);
978 emit_byte (w, p - buf);
979 emit_bytes (w, buf, p - buf);
986 emit_uleb128 (w, 0x0);
988 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
989 emit_uleb128 (w, ABBREV_TYPEDEF);
990 emit_string (w, full_name);
991 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
993 /* Add a pointer type */
994 emit_label (w, pointer_die);
996 emit_uleb128 (w, ABBREV_POINTER_TYPE);
997 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
999 /* Add a reference type */
1000 emit_label (w, reference_die);
1002 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1003 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1007 if (emit_namespace) {
1009 emit_uleb128 (w, 0x0);
1016 emit_type (MonoDwarfWriter *w, MonoType *t)
1018 MonoClass *klass = mono_class_from_mono_type (t);
1023 if (t->type == MONO_TYPE_VALUETYPE) {
1024 tdie = emit_class_dwarf_info (w, klass, TRUE);
1026 return g_hash_table_lookup (w->class_to_pointer_die, klass);
1029 tdie = emit_class_dwarf_info (w, klass, FALSE);
1030 /* Should return a pointer type to a reference */
1033 t = &mono_defaults.int_class->byval_arg;
1035 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1036 if (basic_types [j].type == t->type)
1038 if (j < G_N_ELEMENTS (basic_types))
1039 tdie = basic_types [j].die_name;
1042 case MONO_TYPE_CLASS:
1043 emit_class_dwarf_info (w, klass, FALSE);
1044 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1045 //tdie = ".LDIE_OBJECT";
1047 case MONO_TYPE_ARRAY:
1048 tdie = ".LDIE_OBJECT";
1050 case MONO_TYPE_VALUETYPE:
1051 if (klass->enumtype)
1052 tdie = emit_class_dwarf_info (w, klass, FALSE);
1056 case MONO_TYPE_GENERICINST:
1057 if (!MONO_TYPE_ISSTRUCT (t)) {
1058 emit_class_dwarf_info (w, klass, FALSE);
1059 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1074 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1078 tdie = emit_type (w, t);
1080 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1084 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1087 /* FIXME: This needs a location list, since the args can go from reg->stack */
1088 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1089 /* gdb treats this as optimized out */
1090 } else if (ins->opcode == OP_REGVAR) {
1091 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1093 } else if (ins->opcode == OP_REGOFFSET) {
1094 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1095 encode_sleb128 (ins->inst_offset, p, &p);
1105 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1106 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1107 guint8 *expr, guint32 expr_len)
1111 emit_push_section (w, ".debug_loc", 0);
1112 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1113 emit_label (w, label);
1115 emit_pointer_value (w, loclist_begin_addr);
1116 emit_pointer_value (w, loclist_end_addr);
1117 emit_byte (w, expr_len % 256);
1118 emit_byte (w, expr_len / 256);
1119 emit_bytes (w, expr, expr_len);
1121 emit_pointer_value (w, NULL);
1122 emit_pointer_value (w, NULL);
1124 emit_pop_section (w);
1125 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1129 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1130 * it is a public header.
1132 static const guint8 *token_handler_ip;
1135 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1138 MonoMethod *cmethod;
1140 MonoClassField *field;
1141 gpointer data = NULL;
1143 if (method->wrapper_type)
1144 data = mono_method_get_wrapper_data (method, token);
1146 switch (*token_handler_ip) {
1150 if (method->wrapper_type)
1153 klass = mono_class_get_full (method->klass->image, token, NULL);
1154 res = g_strdup_printf ("<%s>", klass->name);
1159 if (method->wrapper_type)
1162 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1163 desc = mono_method_full_name (cmethod, TRUE);
1164 res = g_strdup_printf ("<%s>", desc);
1168 if (method->wrapper_type) {
1169 desc = mono_signature_get_desc (data, FALSE);
1170 res = g_strdup_printf ("<%s>", desc);
1173 res = g_strdup_printf ("<0x%08x>", token);
1180 if (method->wrapper_type)
1183 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1184 desc = mono_field_full_name (field);
1185 res = g_strdup_printf ("<%s>", desc);
1189 res = g_strdup_printf ("<0x%08x>", token);
1199 * Produce a disassembled form of the IL instruction at IP. This is an extension
1200 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1201 * CEE_MONO_ opcodes.
1204 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1208 MonoMethodHeader *header = mono_method_get_header (method);
1210 memset (&dh, 0, sizeof (dh));
1212 dh.label_format = "IL_%04x: ";
1213 dh.label_target = "IL_%04x";
1214 dh.tokener = token_handler;
1216 token_handler_ip = ip;
1217 if (*ip == MONO_CUSTOM_PREFIX) {
1222 case CEE_MONO_ICALL: {
1223 MonoJitICallInfo *info;
1225 token = read32 (ip + 2);
1226 data = mono_method_get_wrapper_data (method, token);
1227 info = mono_find_jit_icall_by_addr (data);
1230 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1234 case CEE_MONO_CLASSCONST: {
1235 token = read32 (ip + 2);
1236 data = mono_method_get_wrapper_data (method, token);
1238 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1243 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1246 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1248 token_handler_ip = NULL;
1255 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1256 guint32 native_offset)
1260 if (!jit->line_numbers)
1263 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1264 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1266 if (lne.native_offset <= native_offset)
1267 return lne.il_offset;
1273 static int max_special_addr_diff = 0;
1276 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1280 /* Use a special opcode if possible */
1281 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1282 if (max_special_addr_diff == 0)
1283 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1285 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1286 emit_byte (w, DW_LNS_const_add_pc);
1287 addr_diff -= max_special_addr_diff;
1290 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1296 emit_byte (w, opcode);
1298 emit_byte (w, DW_LNS_advance_line);
1299 emit_sleb128 (w, line_diff);
1300 emit_byte (w, DW_LNS_advance_pc);
1301 emit_sleb128 (w, addr_diff);
1302 emit_byte (w, DW_LNS_copy);
1307 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1309 if (a->native_offset == b->native_offset)
1310 return a->il_offset - b->il_offset;
1312 return a->native_offset - b->native_offset;
1316 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1317 char *start_symbol, char *end_symbol,
1318 guint8 *code, guint32 code_size,
1319 MonoDebugMethodJitInfo *debug_info)
1321 guint32 prev_line = 0;
1322 guint32 prev_native_offset = 0;
1323 int i, file_index, il_offset, prev_il_offset;
1324 gboolean first = TRUE;
1325 MonoDebugSourceLocation *loc;
1326 char *prev_file_name = NULL;
1327 MonoMethodHeader *header = mono_method_get_header (method);
1328 MonoDebugMethodInfo *minfo;
1330 int *native_to_il_offset = NULL;
1335 minfo = mono_debug_lookup_method (method);
1337 /* Compute the native->IL offset mapping */
1339 g_assert (code_size);
1341 #ifndef _EGLIB_MAJOR
1342 ln_array = g_array_sized_new (FALSE, FALSE, sizeof (MonoDebugLineNumberEntry),
1343 debug_info->num_line_numbers);
1344 g_array_append_vals (ln_array, debug_info->line_numbers, debug_info->num_line_numbers);
1345 g_array_sort (ln_array, (GCompareFunc)compare_lne);
1346 native_to_il_offset = g_new0 (int, code_size + 1);
1348 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1350 MonoDebugLineNumberEntry lne = g_array_index (ln_array, MonoDebugLineNumberEntry, i);
1353 for (j = 0; j < lne.native_offset; ++j)
1354 native_to_il_offset [j] = -1;
1357 if (i < debug_info->num_line_numbers - 1) {
1358 MonoDebugLineNumberEntry lne_next = g_array_index (ln_array, MonoDebugLineNumberEntry, i + 1);
1360 for (j = lne.native_offset; j < lne_next.native_offset; ++j)
1361 native_to_il_offset [j] = lne.il_offset;
1363 for (j = lne.native_offset; j < code_size; ++j)
1364 native_to_il_offset [j] = lne.il_offset;
1367 g_array_free (ln_array, TRUE);
1371 prev_il_offset = -1;
1373 for (i = 0; i < code_size; ++i) {
1377 if (!debug_info->line_numbers)
1380 if (native_to_il_offset)
1381 il_offset = native_to_il_offset [i];
1383 il_offset = il_offset_from_address (method, debug_info, i);
1385 il_offset = il_offset_from_address (method, debug_info, i);
1387 g_assert (il_offset == native_to_il_offset [i]);
1390 il_offset = native_to_il_offset [i];
1394 if (il_offset == prev_il_offset)
1397 prev_il_offset = il_offset;
1399 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1402 int line_diff = (gint32)loc->row - (gint32)prev_line;
1403 int addr_diff = i - prev_native_offset;
1406 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1409 emit_byte (w, sizeof (gpointer) + 1);
1410 emit_byte (w, DW_LNE_set_address);
1412 emit_pointer_unaligned (w, start_symbol);
1414 emit_pointer_value (w, code);
1417 * The prolog+initlocals region does not have a line number, this
1418 * makes them belong to the first line of the method.
1420 emit_byte (w, DW_LNS_advance_line);
1421 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1422 prev_line = loc->row;
1425 if (loc->row != prev_line) {
1426 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1427 /* Add an entry to the file table */
1428 /* FIXME: Avoid duplicates */
1429 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1430 g_free (prev_file_name);
1431 prev_file_name = g_strdup (loc->source_file);
1433 emit_byte (w, DW_LNS_set_file);
1434 emit_uleb128 (w, file_index);
1435 emit_byte (w, DW_LNS_copy);
1438 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1440 emit_advance_op (w, line_diff, addr_diff);
1442 prev_line = loc->row;
1443 prev_native_offset = i;
1451 g_free (prev_file_name);
1454 emit_byte (w, DW_LNS_advance_pc);
1455 emit_sleb128 (w, code_size - prev_native_offset);
1456 emit_byte (w, DW_LNS_copy);
1460 emit_byte (w, DW_LNE_end_sequence);
1461 } else if (!start_symbol) {
1462 /* No debug info, XDEBUG mode */
1464 const guint8 *ip = header->code;
1465 int prev_line, prev_native_offset;
1469 * Emit the IL code into a temporary file and emit line number info
1470 * referencing that file.
1473 name = mono_method_full_name (method, TRUE);
1474 fprintf (w->il_file, "// %s\n", name);
1475 w->il_file_line_index ++;
1478 il_to_line = g_new0 (int, header->code_size);
1480 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1482 emit_byte (w, sizeof (gpointer) + 1);
1483 emit_byte (w, DW_LNE_set_address);
1484 emit_pointer_value (w, code);
1486 // FIXME: Optimize this
1487 while (ip < header->code + header->code_size) {
1488 int il_offset = ip - header->code;
1491 w->il_file_line_index ++;
1493 dis = disasm_ins (method, ip, &ip);
1494 fprintf (w->il_file, "%s\n", dis);
1497 il_to_line [il_offset] = w->il_file_line_index;
1500 /* Emit line number info */
1502 prev_native_offset = 0;
1503 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1504 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1507 if (lne->il_offset >= header->code_size)
1509 line = il_to_line [lne->il_offset];
1512 * This seems to happen randomly, it looks like il_offset points
1513 * into the middle of an instruction.
1517 printf ("%s\n", mono_method_full_name (method, TRUE));
1518 printf ("%d %d\n", lne->il_offset, header->code_size);
1523 if (line - prev_line != 0) {
1524 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1527 prev_native_offset = lne->native_offset;
1531 emit_byte (w, DW_LNS_advance_pc);
1532 emit_sleb128 (w, code_size - prev_native_offset);
1533 emit_byte (w, DW_LNS_copy);
1537 emit_byte (w, DW_LNE_end_sequence);
1539 fflush (w->il_file);
1540 g_free (il_to_line);
1544 static MonoMethodVar*
1545 find_vmv (MonoCompile *cfg, MonoInst *ins)
1550 for (j = 0; j < cfg->num_varinfo; ++j) {
1551 if (cfg->varinfo [j] == ins)
1555 if (j < cfg->num_varinfo) {
1556 return MONO_VARINFO (cfg, j);
1564 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1567 MonoMethodSignature *sig;
1568 MonoMethodHeader *header;
1569 char **names, **tdies, **local_tdies;
1576 emit_section_change (w, ".debug_info", 0);
1578 sig = mono_method_signature (method);
1579 header = mono_method_get_header (method);
1581 /* Parameter types */
1582 tdies = g_new0 (char *, sig->param_count + sig->hasthis);
1583 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1586 if (i == 0 && sig->hasthis) {
1587 if (method->klass->valuetype)
1588 t = &method->klass->this_arg;
1590 t = &method->klass->byval_arg;
1592 t = sig->params [i - sig->hasthis];
1599 local_tdies = g_new0 (char *, header->num_locals);
1600 for (i = 0; i < header->num_locals; ++i) {
1601 emit_type (w, header->locals [i]);
1605 names = g_new0 (char *, sig->param_count);
1606 mono_method_get_param_names (method, (const char **) names);
1608 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1609 name = mono_method_full_name (method, FALSE);
1610 emit_string (w, name);
1613 emit_pointer_unaligned (w, start_symbol);
1614 emit_pointer_unaligned (w, end_symbol);
1616 emit_pointer_value (w, code);
1617 emit_pointer_value (w, code + code_size);
1621 emit_byte (w, DW_OP_breg6);
1625 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1626 MonoInst *arg = args ? args [i] : NULL;
1629 char pname_buf [128];
1630 MonoMethodVar *vmv = NULL;
1631 gboolean need_loclist = FALSE;
1633 vmv = find_vmv (cfg, arg);
1634 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1635 need_loclist = TRUE;
1637 if (i == 0 && sig->hasthis) {
1638 if (method->klass->valuetype)
1639 t = &method->klass->this_arg;
1641 t = &method->klass->byval_arg;
1644 t = sig->params [i - sig->hasthis];
1645 pname = names [i - sig->hasthis];
1648 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1650 if (pname[0] == '\0') {
1651 sprintf (pname_buf, "param%d", i - sig->hasthis);
1654 emit_string (w, pname);
1656 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1657 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1659 emit_var_type (w, t);
1662 encode_var_location (w, arg, p, &p);
1664 vmv->live_range_start = 0;
1665 if (vmv->live_range_end == 0)
1666 /* FIXME: Uses made in calls are not recorded */
1667 vmv->live_range_end = code_size;
1668 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1670 emit_byte (w, p - buf);
1671 emit_bytes (w, buf, p - buf);
1677 num_locals = mono_debug_lookup_locals (method, &local_names, &local_indexes);
1679 for (i = 0; i < header->num_locals; ++i) {
1680 MonoInst *ins = locals [i];
1681 char name_buf [128];
1683 MonoMethodVar *vmv = NULL;
1684 gboolean need_loclist = FALSE;
1686 /* ins->dreg no longer contains the original vreg */
1687 vmv = find_vmv (cfg, ins);
1689 if (vmv->live_range_start) {
1690 /* This variable has a precise live range */
1691 need_loclist = TRUE;
1695 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1697 for (j = 0; j < num_locals; ++j)
1698 if (local_indexes [j] == i)
1700 if (j < num_locals) {
1701 emit_string (w, local_names [j]);
1703 sprintf (name_buf, "V_%d", i);
1704 emit_string (w, name_buf);
1707 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1708 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1710 emit_var_type (w, header->locals [i]);
1713 encode_var_location (w, ins, p, &p);
1716 if (vmv->live_range_end == 0)
1717 /* FIXME: Uses made in calls are not recorded */
1718 vmv->live_range_end = code_size;
1719 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1721 emit_byte (w, p - buf);
1722 emit_bytes (w, buf, p - buf);
1726 g_free (local_names);
1727 g_free (local_indexes);
1729 /* Subprogram end */
1730 emit_uleb128 (w, 0x0);
1734 emit_debug_info_end (w);
1736 /* Emit unwind info */
1738 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1742 /* Emit line number info */
1743 /* != could happen when using --regression */
1744 if (debug_info && (debug_info->code_start == code))
1745 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
1751 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)
1753 emit_section_change (w, ".debug_info", 0);
1756 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1757 emit_string (w, tramp_name);
1758 emit_pointer_value (w, code);
1759 emit_pointer_value (w, code + code_size);
1762 emit_byte (w, DW_OP_breg6);
1765 /* Subprogram end */
1766 emit_uleb128 (w, 0x0);
1768 emit_debug_info_end (w);
1770 /* Emit unwind info */
1771 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
1774 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */