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/metadata/mono-debug-debugger.h>
25 #include <mono/utils/mono-compiler.h>
28 #include <mono/utils/freebsd-elf32.h>
29 #include <mono/utils/freebsd-elf64.h>
32 #include <mono/utils/freebsd-dwarf.h>
34 #define DW_AT_MIPS_linkage_name 0x2007
35 #define DW_LNE_set_prologue_end 0x0a
39 char *start_symbol, *end_symbol;
42 } MethodLineNumberInfo;
44 struct _MonoDwarfWriter
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;
52 int il_file_line_index, loclist_index;
55 const char *temp_prefix;
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);
68 * mono_dwarf_writer_create:
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.
75 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean emit_line_numbers)
77 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
81 w->il_file_line_index = il_file_start_line;
83 w->emit_line = emit_line_numbers;
85 w->fp = mono_img_writer_get_fp (w->w);
86 w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
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;
98 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
104 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
106 return w->il_file_line_index;
109 /* Wrappers around the image writer functions */
112 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
114 mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
118 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
120 mono_img_writer_emit_push_section (w->w, section_name, subsection);
124 emit_pop_section (MonoDwarfWriter *w)
126 mono_img_writer_emit_pop_section (w->w);
130 emit_label (MonoDwarfWriter *w, const char *name)
132 mono_img_writer_emit_label (w->w, name);
136 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
138 mono_img_writer_emit_bytes (w->w, buf, size);
142 emit_string (MonoDwarfWriter *w, const char *value)
144 mono_img_writer_emit_string (w->w, value);
148 emit_line (MonoDwarfWriter *w)
150 mono_img_writer_emit_line (w->w);
154 emit_alignment (MonoDwarfWriter *w, int size)
156 mono_img_writer_emit_alignment (w->w, size);
160 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
162 mono_img_writer_emit_pointer_unaligned (w->w, target);
166 emit_pointer (MonoDwarfWriter *w, const char *target)
168 mono_img_writer_emit_pointer (w->w, target);
172 emit_int16 (MonoDwarfWriter *w, int value)
174 mono_img_writer_emit_int16 (w->w, value);
178 emit_int32 (MonoDwarfWriter *w, int value)
180 mono_img_writer_emit_int32 (w->w, value);
184 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
186 mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
190 emit_byte (MonoDwarfWriter *w, guint8 val)
192 mono_img_writer_emit_byte (w->w, val);
196 emit_escaped_string (MonoDwarfWriter *w, char *value)
200 len = strlen (value);
201 for (i = 0; i < len; ++i) {
203 if (!(isalnum (c))) {
225 mono_img_writer_emit_string (w->w, value);
228 static G_GNUC_UNUSED void
229 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
232 guint8 b = value & 0x7f;
234 if (value != 0) /* more bytes to come */
240 static G_GNUC_UNUSED void
241 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
244 gboolean negative = (value < 0);
251 /* the following is unnecessary if the
252 * implementation of >>= uses an arithmetic rather
253 * than logical shift for a signed left operand
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)))
268 static G_GNUC_UNUSED void
269 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
274 guint8 b = value & 0x7f;
276 if (value != 0) /* more bytes to come */
284 static G_GNUC_UNUSED void
285 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
288 gboolean negative = (value < 0);
296 /* the following is unnecessary if the
297 * implementation of >>= uses an arithmetic rather
298 * than logical shift for a signed left operand
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)))
316 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
317 int *attrs, int attrs_len)
321 emit_uleb128 (w, code);
322 emit_uleb128 (w, tag);
323 emit_byte (w, has_child);
325 for (i = 0; i < attrs_len; i++)
326 emit_uleb128 (w, attrs [i]);
332 emit_cie (MonoDwarfWriter *w)
334 emit_section_change (w, ".debug_frame", 0);
336 emit_alignment (w, 8);
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 ());
348 w->cie_program = w->cie_program;
349 if (w->cie_program) {
351 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
352 emit_bytes (w, uw_info, uw_info_len);
356 emit_alignment (w, sizeof (gpointer));
357 emit_label (w, ".Lcie0_end");
361 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
363 gssize val = (gssize)ptr;
364 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
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)
377 emit_section_change (w, ".debug_frame", 0);
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 */
385 emit_pointer (w, start_symbol); /* initial_location */
387 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
389 g_assert (code_size);
390 emit_int32 (w, code_size);
393 emit_pointer_value (w, code);
394 emit_int32 (w, code_size);
396 #if SIZEOF_VOID_P == 8
397 /* Upper 32 bits of code size */
402 if (w->cie_program) {
403 // FIXME: Check that the ops really begin with the CIE program */
406 for (i = 0; i < g_slist_length (w->cie_program); ++i)
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);
416 emit_alignment (w, sizeof (mgreg_t));
417 emit_label (w, symbol2);
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
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
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,
456 DW_AT_description , DW_FORM_string,
458 DW_AT_low_pc , DW_FORM_addr,
459 DW_AT_high_pc , DW_FORM_addr,
460 DW_AT_frame_base , DW_FORM_block1
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,
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
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
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
487 static int struct_type_attr [] = {
488 DW_AT_name, DW_FORM_string,
489 DW_AT_byte_size, DW_FORM_udata,
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
498 static int typedef_attr [] = {
499 DW_AT_name, DW_FORM_string,
500 DW_AT_type, DW_FORM_ref4
503 static int pointer_type_attr [] = {
504 DW_AT_type, DW_FORM_ref4,
507 static int reference_type_attr [] = {
508 DW_AT_type, DW_FORM_ref4,
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,
517 static int enumerator_attr [] = {
518 DW_AT_name, DW_FORM_string,
519 DW_AT_const_value, DW_FORM_sdata,
522 static int namespace_attr [] = {
523 DW_AT_name, DW_FORM_string,
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
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
538 static int inheritance_attr [] = {
539 DW_AT_type, DW_FORM_ref4,
540 DW_AT_data_member_location, DW_FORM_block1
543 typedef struct DwarfBasicType {
544 const char *die_name, *name;
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 },
570 /* Constants for encoding line number special opcodes */
571 #define OPCODE_BASE 13
573 #define LINE_RANGE 14
575 /* Subsections of the .debug_line section */
576 #define LINE_SUBSECTION_HEADER 1
577 #define LINE_SUBSECTION_INCLUDES 2
578 #define LINE_SUBSECTION_FILES 3
579 #define LINE_SUBSECTION_DATA 4
580 #define LINE_SUBSECTION_END 5
583 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
584 gint64 last_mod_time, gint64 file_size)
588 char *basename = NULL;
590 if (!w->file_to_index)
591 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
593 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
597 if (g_path_is_absolute (name)) {
598 char *dir = g_path_get_dirname (name);
600 if (!w->dir_to_index)
601 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
603 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
604 if (dir_index == 0) {
605 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
606 emit_string (w, dir);
608 dir_index = ++ w->line_number_dir_index;
609 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
614 basename = g_path_get_basename (name);
619 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
622 emit_string (w, basename);
624 emit_string (w, name);
625 emit_uleb128 (w, dir_index);
629 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
634 index = ++ w->line_number_file_index;
635 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
641 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
645 g_assert (w->file_to_index);
646 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
647 g_assert (index > 0);
652 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
653 gint64 last_mod_time, gint64 file_size)
658 if (!w->file_to_index) {
659 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
660 w->index_to_file = g_hash_table_new (NULL, NULL);
663 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
666 index = w->line_number_file_index;
667 w->line_number_file_index ++;
668 copy = g_strdup (name);
669 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
670 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
676 mono_dwarf_escape_path (const char *name)
678 if (strchr (name, '\\')) {
683 s = (char *)g_malloc0 ((len + 1) * 2);
685 for (i = 0; i < len; ++i) {
686 if (name [i] == '\\') {
695 return g_strdup (name);
699 emit_all_line_number_info (MonoDwarfWriter *w)
702 GHashTable *dir_to_index, *index_to_dir;
706 add_line_number_file_name (w, "<unknown>", 0, 0);
709 info_list = g_slist_reverse (w->line_info);
710 for (l = info_list; l; l = l->next) {
711 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
712 MonoDebugMethodInfo *minfo;
713 GPtrArray *source_file_list;
716 minfo = mono_debug_lookup_method (info->method);
720 mono_debug_get_seq_points (minfo, NULL, &source_file_list, NULL, NULL, NULL);
721 for (i = 0; i < source_file_list->len; ++i) {
722 MonoDebugSourceInfo *sinfo = (MonoDebugSourceInfo *)g_ptr_array_index (source_file_list, i);
723 add_line_number_file_name (w, sinfo->source_file, 0, 0);
727 /* Preprocess files */
728 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
729 index_to_dir = g_hash_table_new (NULL, NULL);
730 for (i = 0; i < w->line_number_file_index; ++i) {
731 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
735 if (g_path_is_absolute (name)) {
736 char *dir = g_path_get_dirname (name);
738 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
739 if (dir_index == 0) {
740 dir_index = w->line_number_dir_index;
741 w->line_number_dir_index ++;
742 copy = g_strdup (dir);
743 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
744 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
753 /* Line number info header */
754 emit_section_change (w, ".debug_line", 0);
755 emit_label (w, ".Ldebug_line_section_start");
756 emit_label (w, ".Ldebug_line_start");
757 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
758 emit_int16 (w, 0x2); /* version */
759 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
760 emit_byte (w, 1); /* minimum_instruction_length */
761 emit_byte (w, 1); /* default_is_stmt */
762 emit_byte (w, LINE_BASE); /* line_base */
763 emit_byte (w, LINE_RANGE); /* line_range */
764 emit_byte (w, OPCODE_BASE); /* opcode_base */
765 emit_byte (w, 0); /* standard_opcode_lengths */
779 emit_section_change (w, ".debug_line", 0);
780 for (i = 0; i < w->line_number_dir_index; ++i) {
781 char *dir = (char *)g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
783 emit_string (w, mono_dwarf_escape_path (dir));
785 /* End of Includes */
789 for (i = 0; i < w->line_number_file_index; ++i) {
790 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
791 char *basename = NULL, *dir;
794 if (g_path_is_absolute (name)) {
795 dir = g_path_get_dirname (name);
797 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
798 basename = g_path_get_basename (name);
802 emit_string (w, basename);
804 emit_string (w, mono_dwarf_escape_path (name));
805 emit_uleb128 (w, dir_index);
813 emit_label (w, ".Ldebug_line_header_end");
815 /* Emit line number table */
816 for (l = info_list; l; l = l->next) {
817 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
818 MonoDebugMethodJitInfo *dmji;
820 dmji = mono_debug_find_method (info->method, mono_domain_get ());
823 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
824 mono_debug_free_method_jit_info (dmji);
826 g_slist_free (info_list);
830 emit_byte (w, DW_LNE_end_sequence);
832 emit_label (w, ".Ldebug_line_end");
836 * Some assemblers like apple's do not support subsections, so we can't place
837 * .Ldebug_info_end at the end of the section using subsections. Instead, we
838 * define it every time something gets added to the .debug_info section.
839 * The apple assember seems to use the last definition.
842 emit_debug_info_end (MonoDwarfWriter *w)
844 /* This doesn't seem to work/required with recent iphone sdk versions */
846 if (!mono_img_writer_subsections_supported (w->w))
847 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
852 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
854 char *s, *build_info;
858 emit_section_change (w, ".debug_line", 0);
859 emit_label (w, ".Ldebug_line_section_start");
860 emit_label (w, ".Ldebug_line_start");
863 w->cie_program = base_unwind_program;
865 emit_section_change (w, ".debug_abbrev", 0);
866 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
867 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
868 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
869 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
870 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
871 param_attr, G_N_ELEMENTS (param_attr));
872 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
873 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
874 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
875 base_type_attr, G_N_ELEMENTS (base_type_attr));
876 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
877 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
878 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
879 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
880 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
881 data_member_attr, G_N_ELEMENTS (data_member_attr));
882 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
883 typedef_attr, G_N_ELEMENTS (typedef_attr));
884 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
885 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
886 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
887 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
888 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
889 namespace_attr, G_N_ELEMENTS (namespace_attr));
890 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
891 variable_attr, G_N_ELEMENTS (variable_attr));
892 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
893 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
894 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
895 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
896 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
897 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
898 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
899 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
900 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
901 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
904 emit_section_change (w, ".debug_info", 0);
905 emit_label (w, ".Ldebug_info_start");
906 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
907 emit_label (w, ".Ldebug_info_begin");
908 emit_int16 (w, 0x2); /* DWARF version 2 */
909 emit_int32 (w, 0); /* .debug_abbrev offset */
910 emit_byte (w, sizeof (gpointer)); /* address size */
912 /* Compilation unit */
913 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
914 build_info = mono_get_runtime_build_info ();
915 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
919 emit_string (w, cu_name);
921 emit_byte (w, DW_LANG_C);
922 emit_pointer_value (w, 0);
923 emit_pointer_value (w, 0);
924 /* offset into .debug_line section */
925 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
928 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
929 emit_label (w, basic_types [i].die_name);
930 emit_uleb128 (w, ABBREV_BASE_TYPE);
931 emit_byte (w, basic_types [i].size);
932 emit_byte (w, basic_types [i].encoding);
933 emit_string (w, basic_types [i].name);
936 emit_debug_info_end (w);
938 /* debug_loc section */
939 emit_section_change (w, ".debug_loc", 0);
940 emit_label (w, ".Ldebug_loc_start");
946 * mono_dwarf_writer_close:
948 * Finalize the emitted debugging info.
951 mono_dwarf_writer_close (MonoDwarfWriter *w)
953 emit_section_change (w, ".debug_info", 0);
954 emit_byte (w, 0); /* close COMPILE_UNIT */
955 emit_label (w, ".Ldebug_info_end");
958 emit_all_line_number_info (w);
961 static void emit_type (MonoDwarfWriter *w, MonoType *t);
962 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
965 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
970 cache = w->class_to_vtype_die;
972 cache = w->class_to_die;
974 return (const char *)g_hash_table_lookup (cache, klass);
977 /* Returns the local symbol pointing to the emitted debug info */
979 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
981 char *die, *pointer_die, *reference_die;
984 MonoClassField *field;
987 gboolean emit_namespace = FALSE, has_children;
991 cache = w->class_to_vtype_die;
993 cache = w->class_to_die;
995 die = (char *)g_hash_table_lookup (cache, klass);
999 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) ||
1000 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
1004 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
1007 if (klass->name_space && klass->name_space [0] != '\0')
1008 emit_namespace = TRUE;
1010 if (emit_namespace) {
1011 emit_uleb128 (w, ABBREV_NAMESPACE);
1012 emit_string (w, klass->name_space);
1015 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
1017 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
1018 * to separate components.
1020 for (p = full_name; *p; p ++)
1024 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
1025 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
1026 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
1029 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
1030 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
1031 g_hash_table_insert (cache, klass, die);
1033 if (klass->enumtype) {
1034 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
1036 emit_label (w, die);
1038 emit_uleb128 (w, ABBREV_ENUM_TYPE);
1039 emit_string (w, full_name);
1040 emit_uleb128 (w, size);
1041 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
1042 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
1044 g_assert (k < G_N_ELEMENTS (basic_types));
1045 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
1047 /* Emit enum values */
1049 while ((field = mono_class_get_fields (klass, &iter))) {
1051 MonoTypeEnum def_type;
1053 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC))
1055 if (mono_field_is_deleted (field))
1058 emit_uleb128 (w, ABBREV_ENUMERATOR);
1059 emit_string (w, mono_field_get_name (field));
1061 p = mono_class_get_field_default_value (field, &def_type);
1062 /* len = */ mono_metadata_decode_blob_size (p, &p);
1063 switch (mono_class_enum_basetype (klass)->type) {
1066 case MONO_TYPE_BOOLEAN:
1067 emit_sleb128 (w, *p);
1071 case MONO_TYPE_CHAR:
1072 emit_sleb128 (w, read16 (p));
1076 emit_sleb128 (w, read32 (p));
1080 emit_sleb128 (w, read64 (p));
1084 #if SIZEOF_VOID_P == 8
1085 emit_sleb128 (w, read64 (p));
1087 emit_sleb128 (w, read32 (p));
1091 g_assert_not_reached ();
1095 has_children = TRUE;
1102 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1106 /* Emit field types */
1108 while ((field = mono_class_get_fields (klass, &iter))) {
1109 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1112 emit_type (w, field->type);
1116 has_children = parent_die || mono_class_get_fields (klass, &iter);
1118 emit_label (w, die);
1120 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1121 emit_string (w, full_name);
1122 emit_uleb128 (w, klass->instance_size);
1125 emit_uleb128 (w, ABBREV_INHERITANCE);
1126 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1129 *p ++= DW_OP_plus_uconst;
1130 encode_uleb128 (0, p, &p);
1131 emit_byte (w, p - buf);
1132 emit_bytes (w, buf, p - buf);
1137 while ((field = mono_class_get_fields (klass, &iter))) {
1138 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1141 fdie = get_type_die (w, field->type);
1143 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1144 emit_string (w, field->name);
1145 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1148 *p ++= DW_OP_plus_uconst;
1149 if (klass->valuetype && vtype)
1150 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1152 encode_uleb128 (field->offset, p, &p);
1154 emit_byte (w, p - buf);
1155 emit_bytes (w, buf, p - buf);
1162 emit_uleb128 (w, 0x0);
1164 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1165 emit_uleb128 (w, ABBREV_TYPEDEF);
1166 emit_string (w, full_name);
1167 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1169 /* Add a pointer type */
1170 emit_label (w, pointer_die);
1172 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1173 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1175 /* Add a reference type */
1176 emit_label (w, reference_die);
1178 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1179 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1183 if (emit_namespace) {
1185 emit_uleb128 (w, 0x0);
1191 static gboolean base_types_emitted [64];
1194 get_type_die (MonoDwarfWriter *w, MonoType *t)
1196 MonoClass *klass = mono_class_from_mono_type (t);
1201 if (t->type == MONO_TYPE_VALUETYPE) {
1202 tdie = (const char *)g_hash_table_lookup (w->class_to_pointer_die, klass);
1205 tdie = get_class_die (w, klass, FALSE);
1206 /* Should return a pointer type to a reference */
1209 t = &mono_defaults.int_class->byval_arg;
1211 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1212 if (basic_types [j].type == t->type)
1214 if (j < G_N_ELEMENTS (basic_types)) {
1215 tdie = basic_types [j].die_name;
1218 case MONO_TYPE_CLASS:
1219 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1220 //tdie = ".LDIE_OBJECT";
1222 case MONO_TYPE_ARRAY:
1223 tdie = ".LDIE_OBJECT";
1225 case MONO_TYPE_VALUETYPE:
1226 if (klass->enumtype)
1227 tdie = get_class_die (w, klass, FALSE);
1231 case MONO_TYPE_GENERICINST:
1232 if (!MONO_TYPE_ISSTRUCT (t)) {
1233 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1253 emit_type (MonoDwarfWriter *w, MonoType *t)
1255 MonoClass *klass = mono_class_from_mono_type (t);
1260 if (t->type == MONO_TYPE_VALUETYPE) {
1261 tdie = emit_class_dwarf_info (w, klass, TRUE);
1266 emit_class_dwarf_info (w, klass, FALSE);
1269 t = &mono_defaults.int_class->byval_arg;
1271 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1272 if (basic_types [j].type == t->type)
1274 if (j < G_N_ELEMENTS (basic_types)) {
1275 /* Emit a boxed version of base types */
1276 if (j < 64 && !base_types_emitted [j]) {
1277 emit_class_dwarf_info (w, klass, FALSE);
1278 base_types_emitted [j] = TRUE;
1282 case MONO_TYPE_CLASS:
1283 emit_class_dwarf_info (w, klass, FALSE);
1285 case MONO_TYPE_ARRAY:
1287 case MONO_TYPE_VALUETYPE:
1288 if (klass->enumtype)
1289 emit_class_dwarf_info (w, klass, FALSE);
1291 case MONO_TYPE_GENERICINST:
1292 if (!MONO_TYPE_ISSTRUCT (t))
1293 emit_class_dwarf_info (w, klass, FALSE);
1304 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1308 tdie = get_type_die (w, t);
1310 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1314 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1317 /* FIXME: This needs a location list, since the args can go from reg->stack */
1318 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1319 /* gdb treats this as optimized out */
1320 } else if (ins->opcode == OP_REGVAR) {
1321 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1323 } else if (ins->opcode == OP_REGOFFSET) {
1324 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1325 encode_sleb128 (ins->inst_offset, p, &p);
1335 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1336 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1337 guint8 *expr, guint32 expr_len)
1341 emit_push_section (w, ".debug_loc", 0);
1342 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1343 emit_label (w, label);
1345 emit_pointer_value (w, loclist_begin_addr);
1346 emit_pointer_value (w, loclist_end_addr);
1347 emit_byte (w, expr_len % 256);
1348 emit_byte (w, expr_len / 256);
1349 emit_bytes (w, expr, expr_len);
1351 emit_pointer_value (w, NULL);
1352 emit_pointer_value (w, NULL);
1354 emit_pop_section (w);
1355 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1359 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1360 * it is a public header.
1362 static const guint8 *token_handler_ip;
1365 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1369 MonoMethod *cmethod;
1371 MonoClassField *field;
1372 gpointer data = NULL;
1374 if (method->wrapper_type)
1375 data = mono_method_get_wrapper_data (method, token);
1377 switch (*token_handler_ip) {
1381 if (method->wrapper_type) {
1382 klass = (MonoClass *)data;
1384 klass = mono_class_get_checked (method->klass->image, token, &error);
1385 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1387 res = g_strdup_printf ("<%s>", klass->name);
1392 if (method->wrapper_type) {
1393 cmethod = (MonoMethod *)data;
1396 cmethod = mono_get_method_checked (method->klass->image, token, NULL, NULL, &error);
1398 g_error ("Could not load method due to %s", mono_error_get_message (&error)); /* FIXME don't swallow the error */
1400 desc = mono_method_full_name (cmethod, TRUE);
1401 res = g_strdup_printf ("<%s>", desc);
1405 if (method->wrapper_type) {
1406 desc = mono_signature_get_desc ((MonoMethodSignature *)data, FALSE);
1407 res = g_strdup_printf ("<%s>", desc);
1410 res = g_strdup_printf ("<0x%08x>", token);
1417 if (method->wrapper_type) {
1418 field = (MonoClassField *)data;
1420 field = mono_field_from_token_checked (method->klass->image, token, &klass, NULL, &error);
1421 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1423 desc = mono_field_full_name (field);
1424 res = g_strdup_printf ("<%s>", desc);
1428 res = g_strdup_printf ("<0x%08x>", token);
1438 * Produce a disassembled form of the IL instruction at IP. This is an extension
1439 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1440 * CEE_MONO_ opcodes.
1443 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1448 MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1449 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1451 memset (&dh, 0, sizeof (dh));
1453 dh.label_format = "IL_%04x: ";
1454 dh.label_target = "IL_%04x";
1455 dh.tokener = token_handler;
1457 token_handler_ip = ip;
1458 if (*ip == MONO_CUSTOM_PREFIX) {
1463 case CEE_MONO_ICALL: {
1464 MonoJitICallInfo *info;
1466 token = read32 (ip + 2);
1467 data = mono_method_get_wrapper_data (method, token);
1468 info = mono_find_jit_icall_by_addr (data);
1471 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1475 case CEE_MONO_CLASSCONST: {
1476 token = read32 (ip + 2);
1477 data = mono_method_get_wrapper_data (method, token);
1479 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1484 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1487 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1489 token_handler_ip = NULL;
1492 mono_metadata_free_mh (header);
1497 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1498 guint32 native_offset)
1502 if (!jit->line_numbers)
1505 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1506 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1508 if (lne.native_offset <= native_offset)
1509 return lne.il_offset;
1515 static int max_special_addr_diff = 0;
1518 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1522 /* Use a special opcode if possible */
1523 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1524 if (max_special_addr_diff == 0)
1525 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1527 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1528 emit_byte (w, DW_LNS_const_add_pc);
1529 addr_diff -= max_special_addr_diff;
1532 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1538 emit_byte (w, opcode);
1540 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1541 emit_byte (w, DW_LNS_advance_line);
1542 emit_sleb128 (w, line_diff);
1543 emit_byte (w, DW_LNS_advance_pc);
1544 emit_sleb128 (w, addr_diff);
1545 emit_byte (w, DW_LNS_copy);
1550 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1552 if (a->native_offset == b->native_offset)
1553 return a->il_offset - b->il_offset;
1555 return a->native_offset - b->native_offset;
1559 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1560 char *start_symbol, char *end_symbol,
1561 guint8 *code, guint32 code_size,
1562 MonoDebugMethodJitInfo *debug_info)
1565 guint32 prev_line = 0;
1566 guint32 prev_native_offset = 0;
1567 int i, file_index, il_offset, prev_il_offset;
1568 gboolean first = TRUE;
1569 MonoDebugSourceLocation *loc;
1570 char *prev_file_name = NULL;
1571 MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1572 MonoDebugMethodInfo *minfo;
1573 MonoDebugLineNumberEntry *ln_array;
1574 int *native_to_il_offset = NULL;
1576 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1578 if (!w->emit_line) {
1579 mono_metadata_free_mh (header);
1583 minfo = mono_debug_lookup_method (method);
1585 /* Compute the native->IL offset mapping */
1587 g_assert (code_size);
1589 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1590 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1592 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (int (*)(const void *, const void *))compare_lne);
1594 native_to_il_offset = g_new0 (int, code_size + 1);
1596 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1598 MonoDebugLineNumberEntry *lne = &ln_array [i];
1601 for (j = 0; j < lne->native_offset; ++j)
1602 native_to_il_offset [j] = -1;
1605 if (i < debug_info->num_line_numbers - 1) {
1606 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1608 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1609 native_to_il_offset [j] = lne->il_offset;
1611 for (j = lne->native_offset; j < code_size; ++j)
1612 native_to_il_offset [j] = lne->il_offset;
1618 prev_il_offset = -1;
1620 w->cur_file_index = -1;
1621 for (i = 0; i < code_size; ++i) {
1622 int line_diff, addr_diff;
1627 if (!debug_info->line_numbers)
1630 if (native_to_il_offset)
1631 il_offset = native_to_il_offset [i];
1633 il_offset = il_offset_from_address (method, debug_info, i);
1635 il_offset = il_offset_from_address (method, debug_info, i);
1637 g_assert (il_offset == native_to_il_offset [i]);
1640 il_offset = native_to_il_offset [i];
1644 if (il_offset == prev_il_offset)
1647 prev_il_offset = il_offset;
1649 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1652 if (!loc->source_file) {
1653 mono_debug_symfile_free_location (loc);
1657 line_diff = (gint32)loc->row - (gint32)prev_line;
1658 addr_diff = i - prev_native_offset;
1661 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1664 emit_byte (w, sizeof (gpointer) + 1);
1665 emit_byte (w, DW_LNE_set_address);
1667 emit_pointer_unaligned (w, start_symbol);
1669 emit_pointer_value (w, code);
1673 if (loc->row != prev_line) {
1674 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1675 /* Add an entry to the file table */
1676 /* FIXME: Avoid duplicates */
1677 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1678 g_free (prev_file_name);
1679 prev_file_name = g_strdup (loc->source_file);
1681 if (w->cur_file_index != file_index) {
1682 emit_byte (w, DW_LNS_set_file);
1683 emit_uleb128 (w, file_index);
1684 emit_byte (w, DW_LNS_copy);
1685 w->cur_file_index = file_index;
1690 if (loc->row != prev_line) {
1691 if (prev_native_offset == 0)
1692 emit_byte (w, DW_LNE_set_prologue_end);
1694 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1695 emit_advance_op (w, line_diff, addr_diff);
1697 prev_line = loc->row;
1698 prev_native_offset = i;
1701 mono_debug_symfile_free_location (loc);
1705 g_free (native_to_il_offset);
1706 g_free (prev_file_name);
1709 emit_byte (w, DW_LNS_advance_pc);
1710 emit_sleb128 (w, code_size - prev_native_offset);
1711 emit_byte (w, DW_LNS_copy);
1715 emit_byte (w, DW_LNE_end_sequence);
1716 } else if (!start_symbol) {
1717 /* No debug info, XDEBUG mode */
1719 const guint8 *ip = header->code;
1720 int prev_line, prev_native_offset;
1724 * Emit the IL code into a temporary file and emit line number info
1725 * referencing that file.
1728 name = mono_method_full_name (method, TRUE);
1729 fprintf (w->il_file, "// %s\n", name);
1730 w->il_file_line_index ++;
1733 il_to_line = g_new0 (int, header->code_size);
1735 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1737 emit_byte (w, sizeof (gpointer) + 1);
1738 emit_byte (w, DW_LNE_set_address);
1739 emit_pointer_value (w, code);
1741 // FIXME: Optimize this
1742 while (ip < header->code + header->code_size) {
1743 int il_offset = ip - header->code;
1746 w->il_file_line_index ++;
1748 dis = disasm_ins (method, ip, &ip);
1749 fprintf (w->il_file, "%s\n", dis);
1752 il_to_line [il_offset] = w->il_file_line_index;
1755 /* Emit line number info */
1757 prev_native_offset = 0;
1758 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1759 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1762 if (lne->il_offset >= header->code_size)
1764 line = il_to_line [lne->il_offset];
1767 * This seems to happen randomly, it looks like il_offset points
1768 * into the middle of an instruction.
1772 printf ("%s\n", mono_method_full_name (method, TRUE));
1773 printf ("%d %d\n", lne->il_offset, header->code_size);
1778 if (line - prev_line != 0) {
1779 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1782 prev_native_offset = lne->native_offset;
1786 emit_byte (w, DW_LNS_advance_pc);
1787 emit_sleb128 (w, code_size - prev_native_offset);
1788 emit_byte (w, DW_LNS_copy);
1792 emit_byte (w, DW_LNE_end_sequence);
1794 fflush (w->il_file);
1795 g_free (il_to_line);
1797 mono_metadata_free_mh (header);
1800 static MonoMethodVar*
1801 find_vmv (MonoCompile *cfg, MonoInst *ins)
1806 for (j = 0; j < cfg->num_varinfo; ++j) {
1807 if (cfg->varinfo [j] == ins)
1811 if (j < cfg->num_varinfo) {
1812 return MONO_VARINFO (cfg, j);
1820 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1821 guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1825 MonoMethodSignature *sig;
1826 MonoMethodHeader *header;
1828 MonoDebugLocalsInfo *locals_info;
1829 MonoDebugMethodInfo *minfo;
1830 MonoDebugSourceLocation *loc = NULL;
1835 emit_section_change (w, ".debug_info", 0);
1837 sig = mono_method_signature (method);
1838 header = mono_method_get_header_checked (method, &error);
1839 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1841 /* Parameter types */
1842 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1845 if (i == 0 && sig->hasthis) {
1846 if (method->klass->valuetype)
1847 t = &method->klass->this_arg;
1849 t = &method->klass->byval_arg;
1851 t = sig->params [i - sig->hasthis];
1856 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1859 for (i = 0; i < header->num_locals; ++i) {
1860 emit_type (w, header->locals [i]);
1863 minfo = mono_debug_lookup_method (method);
1865 loc = mono_debug_symfile_lookup_location (minfo, 0);
1868 names = g_new0 (char *, sig->param_count);
1869 mono_method_get_param_names (method, (const char **) names);
1871 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1873 name = mono_method_full_name (method, FALSE);
1874 emit_escaped_string (w, name);
1875 /* DW_AT_MIPS_linkage_name */
1877 emit_string (w, linkage_name);
1879 emit_string (w, "");
1880 /* DW_AT_decl_file/DW_AT_decl_line */
1882 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1883 emit_uleb128 (w, file_index + 1);
1884 emit_uleb128 (w, loc->row);
1886 mono_debug_symfile_free_location (loc);
1889 emit_uleb128 (w, 0);
1890 emit_uleb128 (w, 0);
1893 emit_string (w, name);
1897 emit_pointer_unaligned (w, start_symbol);
1898 emit_pointer_unaligned (w, end_symbol);
1900 emit_pointer_value (w, code);
1901 emit_pointer_value (w, code + code_size);
1905 emit_byte (w, DW_OP_breg6);
1909 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1910 MonoInst *arg = args ? args [i] : NULL;
1913 char pname_buf [128];
1914 MonoMethodVar *vmv = NULL;
1915 gboolean need_loclist = FALSE;
1917 vmv = find_vmv (cfg, arg);
1918 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1919 need_loclist = TRUE;
1921 if (i == 0 && sig->hasthis) {
1922 if (method->klass->valuetype)
1923 t = &method->klass->this_arg;
1925 t = &method->klass->byval_arg;
1928 t = sig->params [i - sig->hasthis];
1929 pname = names [i - sig->hasthis];
1932 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1934 if (pname[0] == '\0') {
1935 sprintf (pname_buf, "param%d", i - sig->hasthis);
1938 emit_string (w, pname);
1940 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1941 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1943 emit_var_type (w, t);
1946 encode_var_location (w, arg, p, &p);
1948 vmv->live_range_start = 0;
1949 if (vmv->live_range_end == 0)
1950 /* FIXME: Uses made in calls are not recorded */
1951 vmv->live_range_end = code_size;
1952 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1954 emit_byte (w, p - buf);
1955 emit_bytes (w, buf, p - buf);
1961 locals_info = mono_debug_lookup_locals (method);
1963 for (i = 0; i < header->num_locals; ++i) {
1964 MonoInst *ins = locals [i];
1965 char name_buf [128];
1967 MonoMethodVar *vmv = NULL;
1968 gboolean need_loclist = FALSE;
1971 /* ins->dreg no longer contains the original vreg */
1972 vmv = find_vmv (cfg, ins);
1974 if (vmv->live_range_start) {
1975 /* This variable has a precise live range */
1976 need_loclist = TRUE;
1980 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1984 for (j = 0; j < locals_info->num_locals; ++j)
1985 if (locals_info->locals [j].index == i)
1987 if (j < locals_info->num_locals)
1988 lname = locals_info->locals [j].name;
1991 emit_string (w, lname);
1993 sprintf (name_buf, "V_%d", i);
1994 emit_string (w, name_buf);
1997 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1998 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
2000 emit_var_type (w, header->locals [i]);
2003 encode_var_location (w, ins, p, &p);
2006 if (vmv->live_range_end == 0)
2007 /* FIXME: Uses made in calls are not recorded */
2008 vmv->live_range_end = code_size;
2009 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
2011 emit_byte (w, p - buf);
2012 emit_bytes (w, buf, p - buf);
2017 mono_debug_free_locals (locals_info);
2019 /* Subprogram end */
2020 emit_uleb128 (w, 0x0);
2024 emit_debug_info_end (w);
2026 /* Emit unwind info */
2028 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
2032 /* Save the information needed to emit the line number info later at once */
2033 /* != could happen when using --regression */
2034 if (debug_info && (debug_info->code_start == code)) {
2035 MethodLineNumberInfo *info;
2037 info = g_new0 (MethodLineNumberInfo, 1);
2038 info->method = method;
2039 info->start_symbol = g_strdup (start_symbol);
2040 info->end_symbol = g_strdup (end_symbol);
2042 info->code_size = code_size;
2043 w->line_info = g_slist_prepend (w->line_info, info);
2047 mono_metadata_free_mh (header);
2051 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)
2053 emit_section_change (w, ".debug_info", 0);
2056 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
2057 emit_string (w, tramp_name);
2058 emit_pointer_value (w, code);
2059 emit_pointer_value (w, code + code_size);
2061 /* Subprogram end */
2062 emit_uleb128 (w, 0x0);
2064 emit_debug_info_end (w);
2066 /* Emit unwind info */
2067 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2070 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */