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>
27 #include <mono/utils/freebsd-elf32.h>
28 #include <mono/utils/freebsd-elf64.h>
31 #include <mono/utils/freebsd-dwarf.h>
35 char *start_symbol, *end_symbol;
38 } MethodLineNumberInfo;
40 struct _MonoDwarfWriter
43 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
44 GHashTable *class_to_reference_die;
45 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
46 GHashTable *file_to_index, *index_to_file, *dir_to_index;
48 int il_file_line_index, loclist_index;
51 const char *temp_prefix;
52 gboolean emit_line, appending, collect_line_info;
58 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
59 char *start_symbol, char *end_symbol,
60 guint8 *code, guint32 code_size,
61 MonoDebugMethodJitInfo *debug_info);
64 * mono_dwarf_writer_create:
66 * Create a DWARF writer object. WRITER is the underlying image writer this
67 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
68 * methods which have no line number info. It can be NULL.
69 * If APPENDING is TRUE, the output file will be in assembleable state after each
70 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
71 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
75 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean appending, gboolean emit_line_numbers)
77 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
80 * The appending flag is needed because we use subsections to order things in
81 * the debug info, and:
82 * - apple's assembler doesn't support them
83 * - the binary writer has problems with subsections+alignment
84 * So instead of subsections, we use the _close () function in AOT mode,
85 * which writes out things in order.
90 w->il_file_line_index = il_file_start_line;
91 w->appending = appending;
94 g_assert (img_writer_subsections_supported (w->w));
99 if (!img_writer_subsections_supported (w->w))
100 /* Can't emit line number info without subsections */
101 w->emit_line = FALSE;
103 /* Collect line number info and emit it at once */
104 w->collect_line_info = TRUE;
107 if (!emit_line_numbers) {
108 w->emit_line = FALSE;
109 w->collect_line_info = FALSE;
112 w->fp = img_writer_get_fp (w->w);
113 w->temp_prefix = img_writer_get_temp_label_prefix (w->w);
115 w->class_to_die = g_hash_table_new (NULL, NULL);
116 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
117 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
118 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
119 w->cur_file_index = -1;
125 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
131 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
133 return w->il_file_line_index;
136 /* Wrappers around the image writer functions */
139 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
141 img_writer_emit_section_change (w->w, section_name, subsection_index);
145 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
147 img_writer_emit_push_section (w->w, section_name, subsection);
151 emit_pop_section (MonoDwarfWriter *w)
153 img_writer_emit_pop_section (w->w);
157 emit_local_symbol (MonoDwarfWriter *w, const char *name, const char *end_label, gboolean func)
159 img_writer_emit_local_symbol (w->w, name, end_label, func);
163 emit_label (MonoDwarfWriter *w, const char *name)
165 img_writer_emit_label (w->w, name);
169 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
171 img_writer_emit_bytes (w->w, buf, size);
175 emit_string (MonoDwarfWriter *w, const char *value)
177 img_writer_emit_string (w->w, value);
181 emit_line (MonoDwarfWriter *w)
183 img_writer_emit_line (w->w);
187 emit_alignment (MonoDwarfWriter *w, int size)
189 img_writer_emit_alignment (w->w, size);
193 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
195 img_writer_emit_pointer_unaligned (w->w, target);
199 emit_pointer (MonoDwarfWriter *w, const char *target)
201 img_writer_emit_pointer (w->w, target);
205 emit_int16 (MonoDwarfWriter *w, int value)
207 img_writer_emit_int16 (w->w, value);
211 emit_int32 (MonoDwarfWriter *w, int value)
213 img_writer_emit_int32 (w->w, value);
217 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
219 img_writer_emit_symbol_diff (w->w, end, start, offset);
223 emit_zero_bytes (MonoDwarfWriter *w, int num)
225 img_writer_emit_zero_bytes (w->w, num);
229 emit_byte (MonoDwarfWriter *w, guint8 val)
231 img_writer_emit_byte (w->w, val);
234 static G_GNUC_UNUSED void
235 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
238 guint8 b = value & 0x7f;
240 if (value != 0) /* more bytes to come */
246 static G_GNUC_UNUSED void
247 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
250 gboolean negative = (value < 0);
257 /* the following is unnecessary if the
258 * implementation of >>= uses an arithmetic rather
259 * than logical shift for a signed left operand
263 value |= - ((gint64)1 <<(size - 7));
264 /* sign bit of byte is second high order bit (0x40) */
265 if ((value == 0 && !(byte & 0x40)) ||
266 (value == -1 && (byte & 0x40)))
274 static G_GNUC_UNUSED void
275 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
280 guint8 b = value & 0x7f;
282 if (value != 0) /* more bytes to come */
290 static G_GNUC_UNUSED void
291 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
294 gboolean negative = (value < 0);
302 /* the following is unnecessary if the
303 * implementation of >>= uses an arithmetic rather
304 * than logical shift for a signed left operand
308 value |= - (1 <<(size - 7));
309 /* sign bit of byte is second high order bit (0x40) */
310 if ((value == 0 && !(byte & 0x40)) ||
311 (value == -1 && (byte & 0x40)))
322 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
323 int *attrs, int attrs_len)
327 emit_uleb128 (w, code);
328 emit_uleb128 (w, tag);
329 emit_byte (w, has_child);
331 for (i = 0; i < attrs_len; i++)
332 emit_uleb128 (w, attrs [i]);
338 emit_cie (MonoDwarfWriter *w)
340 emit_section_change (w, ".debug_frame", 0);
342 emit_alignment (w, 8);
345 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
346 emit_label (w, ".Lcie0_start");
347 emit_int32 (w, 0xffffffff); /* CIE id */
348 emit_byte (w, 3); /* version */
349 emit_string (w, ""); /* augmention */
350 emit_sleb128 (w, 1); /* code alignment factor */
351 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
352 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
354 w->cie_program = w->cie_program;
355 if (w->cie_program) {
357 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
358 emit_bytes (w, uw_info, uw_info_len);
362 emit_alignment (w, sizeof (gpointer));
363 emit_label (w, ".Lcie0_end");
367 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
369 gssize val = (gssize)ptr;
370 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
374 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
375 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
383 emit_section_change (w, ".debug_frame", 0);
385 sprintf (symbol1, ".Lfde%d_start", fde_index);
386 sprintf (symbol2, ".Lfde%d_end", fde_index);
387 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
388 emit_label (w, symbol1);
389 emit_int32 (w, 0); /* CIE_pointer */
391 emit_pointer (w, start_symbol); /* initial_location */
393 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
395 g_assert (code_size);
396 emit_int32 (w, code_size);
399 emit_pointer_value (w, code);
400 emit_int32 (w, code_size);
402 #if SIZEOF_VOID_P == 8
403 /* Upper 32 bits of code size */
408 if (w->cie_program) {
409 // FIXME: Check that the ops really begin with the CIE program */
412 for (i = 0; i < g_slist_length (w->cie_program); ++i)
417 /* Convert the list of MonoUnwindOps to the format used by DWARF */
418 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
419 emit_bytes (w, uw_info, uw_info_len);
422 emit_alignment (w, sizeof (mgreg_t));
423 emit_label (w, symbol2);
427 #define ABBREV_COMPILE_UNIT 1
428 #define ABBREV_SUBPROGRAM 2
429 #define ABBREV_PARAM 3
430 #define ABBREV_BASE_TYPE 4
431 #define ABBREV_STRUCT_TYPE 5
432 #define ABBREV_DATA_MEMBER 6
433 #define ABBREV_TYPEDEF 7
434 #define ABBREV_ENUM_TYPE 8
435 #define ABBREV_ENUMERATOR 9
436 #define ABBREV_NAMESPACE 10
437 #define ABBREV_VARIABLE 11
438 #define ABBREV_VARIABLE_LOCLIST 12
439 #define ABBREV_POINTER_TYPE 13
440 #define ABBREV_REFERENCE_TYPE 14
441 #define ABBREV_PARAM_LOCLIST 15
442 #define ABBREV_INHERITANCE 16
443 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
444 #define ABBREV_TRAMP_SUBPROGRAM 18
446 static int compile_unit_attr [] = {
447 DW_AT_producer ,DW_FORM_string,
448 DW_AT_name ,DW_FORM_string,
449 DW_AT_comp_dir ,DW_FORM_string,
450 DW_AT_language ,DW_FORM_data1,
451 DW_AT_low_pc ,DW_FORM_addr,
452 DW_AT_high_pc ,DW_FORM_addr,
453 DW_AT_stmt_list ,DW_FORM_data4
456 static int subprogram_attr [] = {
457 DW_AT_name , DW_FORM_string,
459 DW_AT_description , DW_FORM_string,
461 DW_AT_low_pc , DW_FORM_addr,
462 DW_AT_high_pc , DW_FORM_addr,
463 DW_AT_frame_base , DW_FORM_block1
466 static int tramp_subprogram_attr [] = {
467 DW_AT_name , DW_FORM_string,
468 DW_AT_low_pc , DW_FORM_addr,
469 DW_AT_high_pc , DW_FORM_addr,
472 static int param_attr [] = {
473 DW_AT_name, DW_FORM_string,
474 DW_AT_type, DW_FORM_ref4,
475 DW_AT_location, DW_FORM_block1
478 static int param_loclist_attr [] = {
479 DW_AT_name, DW_FORM_string,
480 DW_AT_type, DW_FORM_ref4,
481 DW_AT_location, DW_FORM_data4
484 static int base_type_attr [] = {
485 DW_AT_byte_size, DW_FORM_data1,
486 DW_AT_encoding, DW_FORM_data1,
487 DW_AT_name, DW_FORM_string
490 static int struct_type_attr [] = {
491 DW_AT_name, DW_FORM_string,
492 DW_AT_byte_size, DW_FORM_udata,
495 static int data_member_attr [] = {
496 DW_AT_name, DW_FORM_string,
497 DW_AT_type, DW_FORM_ref4,
498 DW_AT_data_member_location, DW_FORM_block1
501 static int typedef_attr [] = {
502 DW_AT_name, DW_FORM_string,
503 DW_AT_type, DW_FORM_ref4
506 static int pointer_type_attr [] = {
507 DW_AT_type, DW_FORM_ref4,
510 static int reference_type_attr [] = {
511 DW_AT_type, DW_FORM_ref4,
514 static int enum_type_attr [] = {
515 DW_AT_name, DW_FORM_string,
516 DW_AT_byte_size, DW_FORM_udata,
517 DW_AT_type, DW_FORM_ref4,
520 static int enumerator_attr [] = {
521 DW_AT_name, DW_FORM_string,
522 DW_AT_const_value, DW_FORM_sdata,
525 static int namespace_attr [] = {
526 DW_AT_name, DW_FORM_string,
529 static int variable_attr [] = {
530 DW_AT_name, DW_FORM_string,
531 DW_AT_type, DW_FORM_ref4,
532 DW_AT_location, DW_FORM_block1
535 static int variable_loclist_attr [] = {
536 DW_AT_name, DW_FORM_string,
537 DW_AT_type, DW_FORM_ref4,
538 DW_AT_location, DW_FORM_data4
541 static int inheritance_attr [] = {
542 DW_AT_type, DW_FORM_ref4,
543 DW_AT_data_member_location, DW_FORM_block1
546 typedef struct DwarfBasicType {
547 const char *die_name, *name;
553 static DwarfBasicType basic_types [] = {
554 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
555 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
556 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
557 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
558 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
559 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
560 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
561 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
562 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
563 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
564 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
565 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
566 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
567 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
568 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
569 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
570 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
573 /* Constants for encoding line number special opcodes */
574 #define OPCODE_BASE 13
576 #define LINE_RANGE 14
578 /* Subsections of the .debug_line section */
579 #define LINE_SUBSECTION_HEADER 1
580 #define LINE_SUBSECTION_INCLUDES 2
581 #define LINE_SUBSECTION_FILES 3
582 #define LINE_SUBSECTION_DATA 4
583 #define LINE_SUBSECTION_END 5
586 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
587 gint64 last_mod_time, gint64 file_size)
591 char *basename = NULL;
593 if (!w->file_to_index)
594 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
596 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
600 if (g_path_is_absolute (name)) {
601 char *dir = g_path_get_dirname (name);
603 if (!w->dir_to_index)
604 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
606 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
607 if (dir_index == 0) {
608 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
609 emit_string (w, dir);
611 dir_index = ++ w->line_number_dir_index;
612 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
617 basename = g_path_get_basename (name);
622 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
625 emit_string (w, basename);
627 emit_string (w, name);
628 emit_uleb128 (w, dir_index);
632 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
637 index = ++ w->line_number_file_index;
638 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
644 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
648 g_assert (w->file_to_index);
649 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
650 g_assert (index > 0);
655 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
656 gint64 last_mod_time, gint64 file_size)
661 if (!w->file_to_index) {
662 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
663 w->index_to_file = g_hash_table_new (NULL, NULL);
666 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
669 index = w->line_number_file_index;
670 w->line_number_file_index ++;
671 copy = g_strdup (name);
672 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
673 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
679 mono_dwarf_escape_path (const char *name)
681 if (strchr (name, '\\')) {
686 s = g_malloc0 ((len + 1) * 2);
688 for (i = 0; i < len; ++i) {
689 if (name [i] == '\\') {
698 return g_strdup (name);
702 emit_all_line_number_info (MonoDwarfWriter *w)
705 GHashTable *dir_to_index, *index_to_dir;
709 g_assert (w->collect_line_info);
711 add_line_number_file_name (w, "<unknown>", 0, 0);
714 info_list = g_slist_reverse (w->line_info);
715 for (l = info_list; l; l = l->next) {
716 MethodLineNumberInfo *info = l->data;
717 MonoDebugMethodInfo *minfo;
719 GPtrArray *source_file_list;
722 minfo = mono_debug_lookup_method (info->method);
726 mono_debug_symfile_get_line_numbers_full (minfo, &source_file, &source_file_list, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
727 for (i = 0; i < source_file_list->len; ++i) {
728 MonoDebugSourceInfo *sinfo = g_ptr_array_index (source_file_list, i);
729 add_line_number_file_name (w, sinfo->source_file, 0, 0);
733 /* Preprocess files */
734 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
735 index_to_dir = g_hash_table_new (NULL, NULL);
736 for (i = 0; i < w->line_number_file_index; ++i) {
737 char *name = g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
741 if (g_path_is_absolute (name)) {
742 char *dir = g_path_get_dirname (name);
744 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
745 if (dir_index == 0) {
746 dir_index = w->line_number_dir_index;
747 w->line_number_dir_index ++;
748 copy = g_strdup (dir);
749 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
750 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
759 /* Line number info header */
760 emit_section_change (w, ".debug_line", 0);
761 emit_label (w, ".Ldebug_line_section_start");
762 emit_label (w, ".Ldebug_line_start");
763 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
764 emit_int16 (w, 0x2); /* version */
765 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
766 emit_byte (w, 1); /* minimum_instruction_length */
767 emit_byte (w, 1); /* default_is_stmt */
768 emit_byte (w, LINE_BASE); /* line_base */
769 emit_byte (w, LINE_RANGE); /* line_range */
770 emit_byte (w, OPCODE_BASE); /* opcode_base */
771 emit_byte (w, 0); /* standard_opcode_lengths */
785 emit_section_change (w, ".debug_line", 0);
786 for (i = 0; i < w->line_number_dir_index; ++i) {
787 char *dir = g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
789 emit_string (w, mono_dwarf_escape_path (dir));
791 /* End of Includes */
795 for (i = 0; i < w->line_number_file_index; ++i) {
796 char *name = g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
797 char *basename = NULL, *dir;
800 if (g_path_is_absolute (name)) {
801 dir = g_path_get_dirname (name);
803 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
804 basename = g_path_get_basename (name);
808 emit_string (w, basename);
810 emit_string (w, mono_dwarf_escape_path (name));
811 emit_uleb128 (w, dir_index);
819 emit_label (w, ".Ldebug_line_header_end");
821 /* Emit line number table */
822 for (l = info_list; l; l = l->next) {
823 MethodLineNumberInfo *info = l->data;
824 MonoDebugMethodJitInfo *dmji;
826 dmji = mono_debug_find_method (info->method, mono_domain_get ());;
827 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
828 mono_debug_free_method_jit_info (dmji);
830 g_slist_free (info_list);
834 emit_byte (w, DW_LNE_end_sequence);
836 emit_label (w, ".Ldebug_line_end");
840 * Some assemblers like apple's do not support subsections, so we can't place
841 * .Ldebug_info_end at the end of the section using subsections. Instead, we
842 * define it every time something gets added to the .debug_info section.
843 * The apple assember seems to use the last definition.
846 emit_debug_info_end (MonoDwarfWriter *w)
848 /* This doesn't seem to work/required with recent iphone sdk versions */
850 if (!img_writer_subsections_supported (w->w))
851 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
856 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
858 char *s, *build_info;
861 w->cie_program = base_unwind_program;
863 emit_section_change (w, ".debug_abbrev", 0);
864 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
865 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
866 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
867 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
868 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
869 param_attr, G_N_ELEMENTS (param_attr));
870 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
871 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
872 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
873 base_type_attr, G_N_ELEMENTS (base_type_attr));
874 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
875 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
876 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
877 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
878 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
879 data_member_attr, G_N_ELEMENTS (data_member_attr));
880 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
881 typedef_attr, G_N_ELEMENTS (typedef_attr));
882 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
883 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
884 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
885 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
886 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
887 namespace_attr, G_N_ELEMENTS (namespace_attr));
888 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
889 variable_attr, G_N_ELEMENTS (variable_attr));
890 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
891 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
892 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
893 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
894 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
895 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
896 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
897 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
898 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
899 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
902 emit_section_change (w, ".debug_info", 0);
903 emit_label (w, ".Ldebug_info_start");
904 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
905 emit_label (w, ".Ldebug_info_begin");
906 emit_int16 (w, 0x2); /* DWARF version 2 */
907 emit_int32 (w, 0); /* .debug_abbrev offset */
908 emit_byte (w, sizeof (gpointer)); /* address size */
910 if (img_writer_subsections_supported (w->w) && w->appending) {
911 /* Emit this into a separate section so it gets placed at the end */
912 emit_section_change (w, ".debug_info", 1);
913 emit_byte (w, 0); /* close COMPILE_UNIT */
914 emit_label (w, ".Ldebug_info_end");
915 emit_section_change (w, ".debug_info", 0);
918 /* Compilation unit */
919 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
920 build_info = mono_get_runtime_build_info ();
921 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
925 emit_string (w, cu_name);
927 emit_byte (w, DW_LANG_C);
928 emit_pointer_value (w, 0);
929 emit_pointer_value (w, 0);
930 /* offset into .debug_line section */
932 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
934 emit_pointer_value (w, 0);
937 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
938 emit_label (w, basic_types [i].die_name);
939 emit_uleb128 (w, ABBREV_BASE_TYPE);
940 emit_byte (w, basic_types [i].size);
941 emit_byte (w, basic_types [i].encoding);
942 emit_string (w, basic_types [i].name);
945 emit_debug_info_end (w);
947 /* debug_loc section */
948 emit_section_change (w, ".debug_loc", 0);
949 emit_label (w, ".Ldebug_loc_start");
955 * mono_dwarf_writer_close:
957 * Finalize the emitted debugging info.
960 mono_dwarf_writer_close (MonoDwarfWriter *w)
963 emit_section_change (w, ".debug_info", 0);
964 emit_byte (w, 0); /* close COMPILE_UNIT */
965 emit_label (w, ".Ldebug_info_end");
968 if (w->collect_line_info)
969 emit_all_line_number_info (w);
972 static void emit_type (MonoDwarfWriter *w, MonoType *t);
973 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
976 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
981 cache = w->class_to_vtype_die;
983 cache = w->class_to_die;
985 return g_hash_table_lookup (cache, klass);
988 /* Returns the local symbol pointing to the emitted debug info */
990 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
992 char *die, *pointer_die, *reference_die;
995 MonoClassField *field;
998 gboolean emit_namespace = FALSE, has_children;
1002 cache = w->class_to_vtype_die;
1004 cache = w->class_to_die;
1006 die = g_hash_table_lookup (cache, klass);
1010 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) ||
1011 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
1015 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
1018 if (klass->name_space && klass->name_space [0] != '\0')
1019 emit_namespace = TRUE;
1021 if (emit_namespace) {
1022 emit_uleb128 (w, ABBREV_NAMESPACE);
1023 emit_string (w, klass->name_space);
1026 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
1028 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
1029 * to separate components.
1031 for (p = full_name; *p; p ++)
1035 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
1036 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
1037 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
1040 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
1041 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
1042 g_hash_table_insert (cache, klass, die);
1044 if (klass->enumtype) {
1045 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
1047 emit_label (w, die);
1049 emit_uleb128 (w, ABBREV_ENUM_TYPE);
1050 emit_string (w, full_name);
1051 emit_uleb128 (w, size);
1052 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
1053 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
1055 g_assert (k < G_N_ELEMENTS (basic_types));
1056 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
1058 /* Emit enum values */
1060 while ((field = mono_class_get_fields (klass, &iter))) {
1063 MonoTypeEnum def_type;
1065 if (strcmp ("value__", mono_field_get_name (field)) == 0)
1067 if (mono_field_is_deleted (field))
1070 emit_uleb128 (w, ABBREV_ENUMERATOR);
1071 emit_string (w, mono_field_get_name (field));
1073 p = mono_class_get_field_default_value (field, &def_type);
1074 len = mono_metadata_decode_blob_size (p, &p);
1075 switch (mono_class_enum_basetype (klass)->type) {
1078 case MONO_TYPE_BOOLEAN:
1079 emit_sleb128 (w, *p);
1083 case MONO_TYPE_CHAR:
1084 emit_sleb128 (w, read16 (p));
1088 emit_sleb128 (w, read32 (p));
1092 emit_sleb128 (w, read64 (p));
1096 #if SIZEOF_VOID_P == 8
1097 emit_sleb128 (w, read64 (p));
1099 emit_sleb128 (w, read32 (p));
1103 g_assert_not_reached ();
1107 has_children = TRUE;
1114 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1118 /* Emit field types */
1120 while ((field = mono_class_get_fields (klass, &iter))) {
1121 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1124 emit_type (w, field->type);
1128 has_children = parent_die || mono_class_get_fields (klass, &iter);
1130 emit_label (w, die);
1132 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1133 emit_string (w, full_name);
1134 emit_uleb128 (w, klass->instance_size);
1137 emit_uleb128 (w, ABBREV_INHERITANCE);
1138 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1141 *p ++= DW_OP_plus_uconst;
1142 encode_uleb128 (0, p, &p);
1143 emit_byte (w, p - buf);
1144 emit_bytes (w, buf, p - buf);
1149 while ((field = mono_class_get_fields (klass, &iter))) {
1150 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1153 fdie = get_type_die (w, field->type);
1155 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1156 emit_string (w, field->name);
1157 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1160 *p ++= DW_OP_plus_uconst;
1161 if (klass->valuetype && vtype)
1162 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1164 encode_uleb128 (field->offset, p, &p);
1166 emit_byte (w, p - buf);
1167 emit_bytes (w, buf, p - buf);
1174 emit_uleb128 (w, 0x0);
1176 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1177 emit_uleb128 (w, ABBREV_TYPEDEF);
1178 emit_string (w, full_name);
1179 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1181 /* Add a pointer type */
1182 emit_label (w, pointer_die);
1184 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1185 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1187 /* Add a reference type */
1188 emit_label (w, reference_die);
1190 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1191 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1195 if (emit_namespace) {
1197 emit_uleb128 (w, 0x0);
1203 static gboolean base_types_emitted [64];
1206 get_type_die (MonoDwarfWriter *w, MonoType *t)
1208 MonoClass *klass = mono_class_from_mono_type (t);
1213 if (t->type == MONO_TYPE_VALUETYPE) {
1214 tdie = g_hash_table_lookup (w->class_to_pointer_die, klass);
1217 tdie = get_class_die (w, klass, FALSE);
1218 /* Should return a pointer type to a reference */
1221 t = &mono_defaults.int_class->byval_arg;
1223 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1224 if (basic_types [j].type == t->type)
1226 if (j < G_N_ELEMENTS (basic_types)) {
1227 tdie = basic_types [j].die_name;
1230 case MONO_TYPE_CLASS:
1231 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1232 //tdie = ".LDIE_OBJECT";
1234 case MONO_TYPE_ARRAY:
1235 tdie = ".LDIE_OBJECT";
1237 case MONO_TYPE_VALUETYPE:
1238 if (klass->enumtype)
1239 tdie = get_class_die (w, klass, FALSE);
1243 case MONO_TYPE_GENERICINST:
1244 if (!MONO_TYPE_ISSTRUCT (t)) {
1245 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1265 emit_type (MonoDwarfWriter *w, MonoType *t)
1267 MonoClass *klass = mono_class_from_mono_type (t);
1272 if (t->type == MONO_TYPE_VALUETYPE) {
1273 tdie = emit_class_dwarf_info (w, klass, TRUE);
1278 emit_class_dwarf_info (w, klass, FALSE);
1281 t = &mono_defaults.int_class->byval_arg;
1283 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1284 if (basic_types [j].type == t->type)
1286 if (j < G_N_ELEMENTS (basic_types)) {
1287 /* Emit a boxed version of base types */
1288 if (j < 64 && !base_types_emitted [j]) {
1289 emit_class_dwarf_info (w, klass, FALSE);
1290 base_types_emitted [j] = TRUE;
1294 case MONO_TYPE_CLASS:
1295 emit_class_dwarf_info (w, klass, FALSE);
1297 case MONO_TYPE_ARRAY:
1299 case MONO_TYPE_VALUETYPE:
1300 if (klass->enumtype)
1301 emit_class_dwarf_info (w, klass, FALSE);
1303 case MONO_TYPE_GENERICINST:
1304 if (!MONO_TYPE_ISSTRUCT (t))
1305 emit_class_dwarf_info (w, klass, FALSE);
1316 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1320 tdie = get_type_die (w, t);
1322 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1326 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1329 /* FIXME: This needs a location list, since the args can go from reg->stack */
1330 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1331 /* gdb treats this as optimized out */
1332 } else if (ins->opcode == OP_REGVAR) {
1333 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1335 } else if (ins->opcode == OP_REGOFFSET) {
1336 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1337 encode_sleb128 (ins->inst_offset, p, &p);
1347 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1348 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1349 guint8 *expr, guint32 expr_len)
1353 emit_push_section (w, ".debug_loc", 0);
1354 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1355 emit_label (w, label);
1357 emit_pointer_value (w, loclist_begin_addr);
1358 emit_pointer_value (w, loclist_end_addr);
1359 emit_byte (w, expr_len % 256);
1360 emit_byte (w, expr_len / 256);
1361 emit_bytes (w, expr, expr_len);
1363 emit_pointer_value (w, NULL);
1364 emit_pointer_value (w, NULL);
1366 emit_pop_section (w);
1367 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1371 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1372 * it is a public header.
1374 static const guint8 *token_handler_ip;
1377 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1381 MonoMethod *cmethod;
1383 MonoClassField *field;
1384 gpointer data = NULL;
1386 if (method->wrapper_type)
1387 data = mono_method_get_wrapper_data (method, token);
1389 switch (*token_handler_ip) {
1393 if (method->wrapper_type) {
1396 klass = mono_class_get_checked (method->klass->image, token, &error);
1397 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1399 res = g_strdup_printf ("<%s>", klass->name);
1404 if (method->wrapper_type)
1407 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1408 desc = mono_method_full_name (cmethod, TRUE);
1409 res = g_strdup_printf ("<%s>", desc);
1413 if (method->wrapper_type) {
1414 desc = mono_signature_get_desc (data, FALSE);
1415 res = g_strdup_printf ("<%s>", desc);
1418 res = g_strdup_printf ("<0x%08x>", token);
1425 if (method->wrapper_type)
1428 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1429 desc = mono_field_full_name (field);
1430 res = g_strdup_printf ("<%s>", desc);
1434 res = g_strdup_printf ("<0x%08x>", token);
1444 * Produce a disassembled form of the IL instruction at IP. This is an extension
1445 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1446 * CEE_MONO_ opcodes.
1449 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1453 MonoMethodHeader *header = mono_method_get_header (method);
1455 memset (&dh, 0, sizeof (dh));
1457 dh.label_format = "IL_%04x: ";
1458 dh.label_target = "IL_%04x";
1459 dh.tokener = token_handler;
1461 token_handler_ip = ip;
1462 if (*ip == MONO_CUSTOM_PREFIX) {
1467 case CEE_MONO_ICALL: {
1468 MonoJitICallInfo *info;
1470 token = read32 (ip + 2);
1471 data = mono_method_get_wrapper_data (method, token);
1472 info = mono_find_jit_icall_by_addr (data);
1475 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1479 case CEE_MONO_CLASSCONST: {
1480 token = read32 (ip + 2);
1481 data = mono_method_get_wrapper_data (method, token);
1483 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1488 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1491 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1493 token_handler_ip = NULL;
1496 mono_metadata_free_mh (header);
1501 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1502 guint32 native_offset)
1506 if (!jit->line_numbers)
1509 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1510 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1512 if (lne.native_offset <= native_offset)
1513 return lne.il_offset;
1519 static int max_special_addr_diff = 0;
1522 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1526 /* Use a special opcode if possible */
1527 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1528 if (max_special_addr_diff == 0)
1529 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1531 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1532 emit_byte (w, DW_LNS_const_add_pc);
1533 addr_diff -= max_special_addr_diff;
1536 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1542 emit_byte (w, opcode);
1544 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1545 emit_byte (w, DW_LNS_advance_line);
1546 emit_sleb128 (w, line_diff);
1547 emit_byte (w, DW_LNS_advance_pc);
1548 emit_sleb128 (w, addr_diff);
1549 emit_byte (w, DW_LNS_copy);
1554 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1556 if (a->native_offset == b->native_offset)
1557 return a->il_offset - b->il_offset;
1559 return a->native_offset - b->native_offset;
1563 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1564 char *start_symbol, char *end_symbol,
1565 guint8 *code, guint32 code_size,
1566 MonoDebugMethodJitInfo *debug_info)
1568 guint32 prev_line = 0;
1569 guint32 prev_native_offset = 0;
1570 int i, file_index, il_offset, prev_il_offset;
1571 gboolean first = TRUE;
1572 MonoDebugSourceLocation *loc;
1573 char *prev_file_name = NULL;
1574 MonoMethodHeader *header = mono_method_get_header (method);
1575 MonoDebugMethodInfo *minfo;
1576 MonoDebugLineNumberEntry *ln_array;
1577 int *native_to_il_offset = NULL;
1579 if (!w->emit_line) {
1580 mono_metadata_free_mh (header);
1584 minfo = mono_debug_lookup_method (method);
1586 /* Compute the native->IL offset mapping */
1588 g_assert (code_size);
1590 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1591 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1593 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
1595 native_to_il_offset = g_new0 (int, code_size + 1);
1597 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1599 MonoDebugLineNumberEntry *lne = &ln_array [i];
1602 for (j = 0; j < lne->native_offset; ++j)
1603 native_to_il_offset [j] = -1;
1606 if (i < debug_info->num_line_numbers - 1) {
1607 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1609 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1610 native_to_il_offset [j] = lne->il_offset;
1612 for (j = lne->native_offset; j < code_size; ++j)
1613 native_to_il_offset [j] = lne->il_offset;
1619 prev_il_offset = -1;
1621 w->cur_file_index = -1;
1622 for (i = 0; i < code_size; ++i) {
1623 int line_diff, addr_diff;
1628 if (!debug_info->line_numbers)
1631 if (native_to_il_offset)
1632 il_offset = native_to_il_offset [i];
1634 il_offset = il_offset_from_address (method, debug_info, i);
1636 il_offset = il_offset_from_address (method, debug_info, i);
1638 g_assert (il_offset == native_to_il_offset [i]);
1641 il_offset = native_to_il_offset [i];
1645 if (il_offset == prev_il_offset)
1648 prev_il_offset = il_offset;
1650 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1651 if (!(loc && loc->source_file))
1654 line_diff = (gint32)loc->row - (gint32)prev_line;
1655 addr_diff = i - prev_native_offset;
1658 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1661 emit_byte (w, sizeof (gpointer) + 1);
1662 emit_byte (w, DW_LNE_set_address);
1664 emit_pointer_unaligned (w, start_symbol);
1666 emit_pointer_value (w, code);
1669 * The prolog+initlocals region does not have a line number, this
1670 * makes them belong to the first line of the method.
1672 emit_byte (w, DW_LNS_advance_line);
1673 //printf ("FIRST: %d %d %d\n", prev_line, loc->row, il_offset);
1674 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1678 if (loc->row != prev_line) {
1679 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1680 /* Add an entry to the file table */
1681 /* FIXME: Avoid duplicates */
1682 if (w->collect_line_info)
1683 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1685 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1686 g_free (prev_file_name);
1687 prev_file_name = g_strdup (loc->source_file);
1689 if (w->cur_file_index != file_index) {
1690 emit_byte (w, DW_LNS_set_file);
1691 emit_uleb128 (w, file_index);
1692 emit_byte (w, DW_LNS_copy);
1693 w->cur_file_index = file_index;
1698 if (loc->row != prev_line && !first) {
1699 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1700 emit_advance_op (w, line_diff, addr_diff);
1702 prev_line = loc->row;
1703 prev_native_offset = i;
1706 mono_debug_symfile_free_location (loc);
1710 g_free (native_to_il_offset);
1711 g_free (prev_file_name);
1714 emit_byte (w, DW_LNS_advance_pc);
1715 emit_sleb128 (w, code_size - prev_native_offset);
1716 emit_byte (w, DW_LNS_copy);
1720 emit_byte (w, DW_LNE_end_sequence);
1721 } else if (!start_symbol) {
1722 /* No debug info, XDEBUG mode */
1724 const guint8 *ip = header->code;
1725 int prev_line, prev_native_offset;
1729 * Emit the IL code into a temporary file and emit line number info
1730 * referencing that file.
1733 name = mono_method_full_name (method, TRUE);
1734 fprintf (w->il_file, "// %s\n", name);
1735 w->il_file_line_index ++;
1738 il_to_line = g_new0 (int, header->code_size);
1740 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1742 emit_byte (w, sizeof (gpointer) + 1);
1743 emit_byte (w, DW_LNE_set_address);
1744 emit_pointer_value (w, code);
1746 // FIXME: Optimize this
1747 while (ip < header->code + header->code_size) {
1748 int il_offset = ip - header->code;
1751 w->il_file_line_index ++;
1753 dis = disasm_ins (method, ip, &ip);
1754 fprintf (w->il_file, "%s\n", dis);
1757 il_to_line [il_offset] = w->il_file_line_index;
1760 /* Emit line number info */
1762 prev_native_offset = 0;
1763 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1764 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1767 if (lne->il_offset >= header->code_size)
1769 line = il_to_line [lne->il_offset];
1772 * This seems to happen randomly, it looks like il_offset points
1773 * into the middle of an instruction.
1777 printf ("%s\n", mono_method_full_name (method, TRUE));
1778 printf ("%d %d\n", lne->il_offset, header->code_size);
1783 if (line - prev_line != 0) {
1784 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1787 prev_native_offset = lne->native_offset;
1791 emit_byte (w, DW_LNS_advance_pc);
1792 emit_sleb128 (w, code_size - prev_native_offset);
1793 emit_byte (w, DW_LNS_copy);
1797 emit_byte (w, DW_LNE_end_sequence);
1799 fflush (w->il_file);
1800 g_free (il_to_line);
1802 mono_metadata_free_mh (header);
1805 static MonoMethodVar*
1806 find_vmv (MonoCompile *cfg, MonoInst *ins)
1811 for (j = 0; j < cfg->num_varinfo; ++j) {
1812 if (cfg->varinfo [j] == ins)
1816 if (j < cfg->num_varinfo) {
1817 return MONO_VARINFO (cfg, j);
1825 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)
1828 MonoMethodSignature *sig;
1829 MonoMethodHeader *header;
1831 MonoDebugLocalsInfo *locals_info;
1836 emit_section_change (w, ".debug_info", 0);
1838 sig = mono_method_signature (method);
1839 header = mono_method_get_header (method);
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]);
1864 names = g_new0 (char *, sig->param_count);
1865 mono_method_get_param_names (method, (const char **) names);
1867 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1868 name = mono_method_full_name (method, FALSE);
1869 emit_string (w, name);
1871 emit_string (w, name);
1875 emit_pointer_unaligned (w, start_symbol);
1876 emit_pointer_unaligned (w, end_symbol);
1878 emit_pointer_value (w, code);
1879 emit_pointer_value (w, code + code_size);
1883 emit_byte (w, DW_OP_breg6);
1887 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1888 MonoInst *arg = args ? args [i] : NULL;
1891 char pname_buf [128];
1892 MonoMethodVar *vmv = NULL;
1893 gboolean need_loclist = FALSE;
1895 vmv = find_vmv (cfg, arg);
1896 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1897 need_loclist = TRUE;
1899 if (i == 0 && sig->hasthis) {
1900 if (method->klass->valuetype)
1901 t = &method->klass->this_arg;
1903 t = &method->klass->byval_arg;
1906 t = sig->params [i - sig->hasthis];
1907 pname = names [i - sig->hasthis];
1910 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1912 if (pname[0] == '\0') {
1913 sprintf (pname_buf, "param%d", i - sig->hasthis);
1916 emit_string (w, pname);
1918 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1919 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1921 emit_var_type (w, t);
1924 encode_var_location (w, arg, p, &p);
1926 vmv->live_range_start = 0;
1927 if (vmv->live_range_end == 0)
1928 /* FIXME: Uses made in calls are not recorded */
1929 vmv->live_range_end = code_size;
1930 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1932 emit_byte (w, p - buf);
1933 emit_bytes (w, buf, p - buf);
1939 locals_info = mono_debug_lookup_locals (method);
1941 for (i = 0; i < header->num_locals; ++i) {
1942 MonoInst *ins = locals [i];
1943 char name_buf [128];
1945 MonoMethodVar *vmv = NULL;
1946 gboolean need_loclist = FALSE;
1949 /* ins->dreg no longer contains the original vreg */
1950 vmv = find_vmv (cfg, ins);
1952 if (vmv->live_range_start) {
1953 /* This variable has a precise live range */
1954 need_loclist = TRUE;
1958 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1962 for (j = 0; j < locals_info->num_locals; ++j)
1963 if (locals_info->locals [j].index == i)
1965 if (j < locals_info->num_locals)
1966 lname = locals_info->locals [j].name;
1969 emit_string (w, lname);
1971 sprintf (name_buf, "V_%d", i);
1972 emit_string (w, name_buf);
1975 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1976 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1978 emit_var_type (w, header->locals [i]);
1981 encode_var_location (w, ins, p, &p);
1984 if (vmv->live_range_end == 0)
1985 /* FIXME: Uses made in calls are not recorded */
1986 vmv->live_range_end = code_size;
1987 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1989 emit_byte (w, p - buf);
1990 emit_bytes (w, buf, p - buf);
1995 mono_debug_symfile_free_locals (locals_info);
1997 /* Subprogram end */
1998 emit_uleb128 (w, 0x0);
2002 emit_debug_info_end (w);
2004 /* Emit unwind info */
2006 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
2010 /* Emit line number info */
2011 /* != could happen when using --regression */
2012 if (debug_info && (debug_info->code_start == code)) {
2013 if (w->collect_line_info) {
2014 MethodLineNumberInfo *info;
2016 /* Save the information needed to emit the line number info later at once */
2017 info = g_new0 (MethodLineNumberInfo, 1);
2018 info->method = method;
2019 info->start_symbol = g_strdup (start_symbol);
2020 info->end_symbol = g_strdup (end_symbol);
2022 info->code_size = code_size;
2023 w->line_info = g_slist_prepend (w->line_info, info);
2025 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
2030 mono_metadata_free_mh (header);
2034 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)
2036 emit_section_change (w, ".debug_info", 0);
2039 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
2040 emit_string (w, tramp_name);
2041 emit_pointer_value (w, code);
2042 emit_pointer_value (w, code + code_size);
2044 /* Subprogram end */
2045 emit_uleb128 (w, 0x0);
2047 emit_debug_info_end (w);
2049 /* Emit unwind info */
2050 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2053 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */