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;
56 gboolean emit_line, appending, collect_line_info;
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.
73 * If APPENDING is TRUE, the output file will be in assembleable state after each
74 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
75 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
79 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean appending, gboolean emit_line_numbers)
81 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
84 * The appending flag is needed because we use subsections to order things in
85 * the debug info, and:
86 * - apple's assembler doesn't support them
87 * - the binary writer has problems with subsections+alignment
88 * So instead of subsections, we use the _close () function in AOT mode,
89 * which writes out things in order.
94 w->il_file_line_index = il_file_start_line;
95 w->appending = appending;
98 g_assert (mono_img_writer_subsections_supported (w->w));
103 if (!mono_img_writer_subsections_supported (w->w))
104 /* Can't emit line number info without subsections */
105 w->emit_line = FALSE;
107 /* Collect line number info and emit it at once */
108 w->collect_line_info = TRUE;
111 if (!emit_line_numbers) {
112 w->emit_line = FALSE;
113 w->collect_line_info = FALSE;
116 w->fp = mono_img_writer_get_fp (w->w);
117 w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
119 w->class_to_die = g_hash_table_new (NULL, NULL);
120 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
121 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
122 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
123 w->cur_file_index = -1;
129 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
135 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
137 return w->il_file_line_index;
140 /* Wrappers around the image writer functions */
143 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
145 mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
149 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
151 mono_img_writer_emit_push_section (w->w, section_name, subsection);
155 emit_pop_section (MonoDwarfWriter *w)
157 mono_img_writer_emit_pop_section (w->w);
161 emit_label (MonoDwarfWriter *w, const char *name)
163 mono_img_writer_emit_label (w->w, name);
167 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
169 mono_img_writer_emit_bytes (w->w, buf, size);
173 emit_string (MonoDwarfWriter *w, const char *value)
175 mono_img_writer_emit_string (w->w, value);
179 emit_line (MonoDwarfWriter *w)
181 mono_img_writer_emit_line (w->w);
185 emit_alignment (MonoDwarfWriter *w, int size)
187 mono_img_writer_emit_alignment (w->w, size);
191 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
193 mono_img_writer_emit_pointer_unaligned (w->w, target);
197 emit_pointer (MonoDwarfWriter *w, const char *target)
199 mono_img_writer_emit_pointer (w->w, target);
203 emit_int16 (MonoDwarfWriter *w, int value)
205 mono_img_writer_emit_int16 (w->w, value);
209 emit_int32 (MonoDwarfWriter *w, int value)
211 mono_img_writer_emit_int32 (w->w, value);
215 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
217 mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
221 emit_byte (MonoDwarfWriter *w, guint8 val)
223 mono_img_writer_emit_byte (w->w, val);
226 static G_GNUC_UNUSED void
227 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
230 guint8 b = value & 0x7f;
232 if (value != 0) /* more bytes to come */
238 static G_GNUC_UNUSED void
239 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
242 gboolean negative = (value < 0);
249 /* the following is unnecessary if the
250 * implementation of >>= uses an arithmetic rather
251 * than logical shift for a signed left operand
255 value |= - ((gint64)1 <<(size - 7));
256 /* sign bit of byte is second high order bit (0x40) */
257 if ((value == 0 && !(byte & 0x40)) ||
258 (value == -1 && (byte & 0x40)))
266 static G_GNUC_UNUSED void
267 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
272 guint8 b = value & 0x7f;
274 if (value != 0) /* more bytes to come */
282 static G_GNUC_UNUSED void
283 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
286 gboolean negative = (value < 0);
294 /* the following is unnecessary if the
295 * implementation of >>= uses an arithmetic rather
296 * than logical shift for a signed left operand
300 value |= - (1 <<(size - 7));
301 /* sign bit of byte is second high order bit (0x40) */
302 if ((value == 0 && !(byte & 0x40)) ||
303 (value == -1 && (byte & 0x40)))
314 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
315 int *attrs, int attrs_len)
319 emit_uleb128 (w, code);
320 emit_uleb128 (w, tag);
321 emit_byte (w, has_child);
323 for (i = 0; i < attrs_len; i++)
324 emit_uleb128 (w, attrs [i]);
330 emit_cie (MonoDwarfWriter *w)
332 emit_section_change (w, ".debug_frame", 0);
334 emit_alignment (w, 8);
337 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
338 emit_label (w, ".Lcie0_start");
339 emit_int32 (w, 0xffffffff); /* CIE id */
340 emit_byte (w, 3); /* version */
341 emit_string (w, ""); /* augmention */
342 emit_sleb128 (w, 1); /* code alignment factor */
343 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
344 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
346 w->cie_program = w->cie_program;
347 if (w->cie_program) {
349 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
350 emit_bytes (w, uw_info, uw_info_len);
354 emit_alignment (w, sizeof (gpointer));
355 emit_label (w, ".Lcie0_end");
359 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
361 gssize val = (gssize)ptr;
362 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
366 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
367 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
375 emit_section_change (w, ".debug_frame", 0);
377 sprintf (symbol1, ".Lfde%d_start", fde_index);
378 sprintf (symbol2, ".Lfde%d_end", fde_index);
379 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
380 emit_label (w, symbol1);
381 emit_int32 (w, 0); /* CIE_pointer */
383 emit_pointer (w, start_symbol); /* initial_location */
385 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
387 g_assert (code_size);
388 emit_int32 (w, code_size);
391 emit_pointer_value (w, code);
392 emit_int32 (w, code_size);
394 #if SIZEOF_VOID_P == 8
395 /* Upper 32 bits of code size */
400 if (w->cie_program) {
401 // FIXME: Check that the ops really begin with the CIE program */
404 for (i = 0; i < g_slist_length (w->cie_program); ++i)
409 /* Convert the list of MonoUnwindOps to the format used by DWARF */
410 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
411 emit_bytes (w, uw_info, uw_info_len);
414 emit_alignment (w, sizeof (mgreg_t));
415 emit_label (w, symbol2);
419 #define ABBREV_COMPILE_UNIT 1
420 #define ABBREV_SUBPROGRAM 2
421 #define ABBREV_PARAM 3
422 #define ABBREV_BASE_TYPE 4
423 #define ABBREV_STRUCT_TYPE 5
424 #define ABBREV_DATA_MEMBER 6
425 #define ABBREV_TYPEDEF 7
426 #define ABBREV_ENUM_TYPE 8
427 #define ABBREV_ENUMERATOR 9
428 #define ABBREV_NAMESPACE 10
429 #define ABBREV_VARIABLE 11
430 #define ABBREV_VARIABLE_LOCLIST 12
431 #define ABBREV_POINTER_TYPE 13
432 #define ABBREV_REFERENCE_TYPE 14
433 #define ABBREV_PARAM_LOCLIST 15
434 #define ABBREV_INHERITANCE 16
435 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
436 #define ABBREV_TRAMP_SUBPROGRAM 18
438 static int compile_unit_attr [] = {
439 DW_AT_producer ,DW_FORM_string,
440 DW_AT_name ,DW_FORM_string,
441 DW_AT_comp_dir ,DW_FORM_string,
442 DW_AT_language ,DW_FORM_data1,
443 DW_AT_low_pc ,DW_FORM_addr,
444 DW_AT_high_pc ,DW_FORM_addr,
445 DW_AT_stmt_list ,DW_FORM_data4
448 static int subprogram_attr [] = {
449 DW_AT_name , DW_FORM_string,
450 DW_AT_MIPS_linkage_name, DW_FORM_string,
451 DW_AT_decl_file , DW_FORM_udata,
452 DW_AT_decl_line , DW_FORM_udata,
454 DW_AT_description , DW_FORM_string,
456 DW_AT_low_pc , DW_FORM_addr,
457 DW_AT_high_pc , DW_FORM_addr,
458 DW_AT_frame_base , DW_FORM_block1
461 static int tramp_subprogram_attr [] = {
462 DW_AT_name , DW_FORM_string,
463 DW_AT_low_pc , DW_FORM_addr,
464 DW_AT_high_pc , DW_FORM_addr,
467 static int param_attr [] = {
468 DW_AT_name, DW_FORM_string,
469 DW_AT_type, DW_FORM_ref4,
470 DW_AT_location, DW_FORM_block1
473 static int param_loclist_attr [] = {
474 DW_AT_name, DW_FORM_string,
475 DW_AT_type, DW_FORM_ref4,
476 DW_AT_location, DW_FORM_data4
479 static int base_type_attr [] = {
480 DW_AT_byte_size, DW_FORM_data1,
481 DW_AT_encoding, DW_FORM_data1,
482 DW_AT_name, DW_FORM_string
485 static int struct_type_attr [] = {
486 DW_AT_name, DW_FORM_string,
487 DW_AT_byte_size, DW_FORM_udata,
490 static int data_member_attr [] = {
491 DW_AT_name, DW_FORM_string,
492 DW_AT_type, DW_FORM_ref4,
493 DW_AT_data_member_location, DW_FORM_block1
496 static int typedef_attr [] = {
497 DW_AT_name, DW_FORM_string,
498 DW_AT_type, DW_FORM_ref4
501 static int pointer_type_attr [] = {
502 DW_AT_type, DW_FORM_ref4,
505 static int reference_type_attr [] = {
506 DW_AT_type, DW_FORM_ref4,
509 static int enum_type_attr [] = {
510 DW_AT_name, DW_FORM_string,
511 DW_AT_byte_size, DW_FORM_udata,
512 DW_AT_type, DW_FORM_ref4,
515 static int enumerator_attr [] = {
516 DW_AT_name, DW_FORM_string,
517 DW_AT_const_value, DW_FORM_sdata,
520 static int namespace_attr [] = {
521 DW_AT_name, DW_FORM_string,
524 static int variable_attr [] = {
525 DW_AT_name, DW_FORM_string,
526 DW_AT_type, DW_FORM_ref4,
527 DW_AT_location, DW_FORM_block1
530 static int variable_loclist_attr [] = {
531 DW_AT_name, DW_FORM_string,
532 DW_AT_type, DW_FORM_ref4,
533 DW_AT_location, DW_FORM_data4
536 static int inheritance_attr [] = {
537 DW_AT_type, DW_FORM_ref4,
538 DW_AT_data_member_location, DW_FORM_block1
541 typedef struct DwarfBasicType {
542 const char *die_name, *name;
548 static DwarfBasicType basic_types [] = {
549 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
550 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
551 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
552 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
553 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
554 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
555 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
556 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
557 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
558 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
559 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
560 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
561 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
562 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
563 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
564 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
565 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
568 /* Constants for encoding line number special opcodes */
569 #define OPCODE_BASE 13
571 #define LINE_RANGE 14
573 /* Subsections of the .debug_line section */
574 #define LINE_SUBSECTION_HEADER 1
575 #define LINE_SUBSECTION_INCLUDES 2
576 #define LINE_SUBSECTION_FILES 3
577 #define LINE_SUBSECTION_DATA 4
578 #define LINE_SUBSECTION_END 5
581 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
582 gint64 last_mod_time, gint64 file_size)
586 char *basename = NULL;
588 if (!w->file_to_index)
589 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
591 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
595 if (g_path_is_absolute (name)) {
596 char *dir = g_path_get_dirname (name);
598 if (!w->dir_to_index)
599 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
601 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
602 if (dir_index == 0) {
603 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
604 emit_string (w, dir);
606 dir_index = ++ w->line_number_dir_index;
607 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
612 basename = g_path_get_basename (name);
617 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
620 emit_string (w, basename);
622 emit_string (w, name);
623 emit_uleb128 (w, dir_index);
627 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
632 index = ++ w->line_number_file_index;
633 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
639 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
643 g_assert (w->file_to_index);
644 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
645 g_assert (index > 0);
650 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
651 gint64 last_mod_time, gint64 file_size)
656 if (!w->file_to_index) {
657 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
658 w->index_to_file = g_hash_table_new (NULL, NULL);
661 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
664 index = w->line_number_file_index;
665 w->line_number_file_index ++;
666 copy = g_strdup (name);
667 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
668 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
674 mono_dwarf_escape_path (const char *name)
676 if (strchr (name, '\\')) {
681 s = g_malloc0 ((len + 1) * 2);
683 for (i = 0; i < len; ++i) {
684 if (name [i] == '\\') {
693 return g_strdup (name);
697 emit_all_line_number_info (MonoDwarfWriter *w)
700 GHashTable *dir_to_index, *index_to_dir;
704 g_assert (w->collect_line_info);
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 = 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 = 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 = 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 = 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 = 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 = 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;
857 w->cie_program = base_unwind_program;
859 emit_section_change (w, ".debug_abbrev", 0);
860 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
861 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
862 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
863 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
864 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
865 param_attr, G_N_ELEMENTS (param_attr));
866 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
867 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
868 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
869 base_type_attr, G_N_ELEMENTS (base_type_attr));
870 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
871 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
872 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
873 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
874 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
875 data_member_attr, G_N_ELEMENTS (data_member_attr));
876 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
877 typedef_attr, G_N_ELEMENTS (typedef_attr));
878 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
879 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
880 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
881 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
882 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
883 namespace_attr, G_N_ELEMENTS (namespace_attr));
884 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
885 variable_attr, G_N_ELEMENTS (variable_attr));
886 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
887 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
888 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
889 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
890 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
891 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
892 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
893 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
894 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
895 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
898 emit_section_change (w, ".debug_info", 0);
899 emit_label (w, ".Ldebug_info_start");
900 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
901 emit_label (w, ".Ldebug_info_begin");
902 emit_int16 (w, 0x2); /* DWARF version 2 */
903 emit_int32 (w, 0); /* .debug_abbrev offset */
904 emit_byte (w, sizeof (gpointer)); /* address size */
906 if (mono_img_writer_subsections_supported (w->w) && w->appending) {
907 /* Emit this into a separate section so it gets placed at the end */
908 emit_section_change (w, ".debug_info", 1);
909 emit_byte (w, 0); /* close COMPILE_UNIT */
910 emit_label (w, ".Ldebug_info_end");
911 emit_section_change (w, ".debug_info", 0);
914 /* Compilation unit */
915 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
916 build_info = mono_get_runtime_build_info ();
917 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
921 emit_string (w, cu_name);
923 emit_byte (w, DW_LANG_C);
924 emit_pointer_value (w, 0);
925 emit_pointer_value (w, 0);
926 /* offset into .debug_line section */
928 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
930 emit_pointer_value (w, 0);
933 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
934 emit_label (w, basic_types [i].die_name);
935 emit_uleb128 (w, ABBREV_BASE_TYPE);
936 emit_byte (w, basic_types [i].size);
937 emit_byte (w, basic_types [i].encoding);
938 emit_string (w, basic_types [i].name);
941 emit_debug_info_end (w);
943 /* debug_loc section */
944 emit_section_change (w, ".debug_loc", 0);
945 emit_label (w, ".Ldebug_loc_start");
951 * mono_dwarf_writer_close:
953 * Finalize the emitted debugging info.
956 mono_dwarf_writer_close (MonoDwarfWriter *w)
959 emit_section_change (w, ".debug_info", 0);
960 emit_byte (w, 0); /* close COMPILE_UNIT */
961 emit_label (w, ".Ldebug_info_end");
964 if (w->collect_line_info)
965 emit_all_line_number_info (w);
968 static void emit_type (MonoDwarfWriter *w, MonoType *t);
969 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
972 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
977 cache = w->class_to_vtype_die;
979 cache = w->class_to_die;
981 return g_hash_table_lookup (cache, klass);
984 /* Returns the local symbol pointing to the emitted debug info */
986 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
988 char *die, *pointer_die, *reference_die;
991 MonoClassField *field;
994 gboolean emit_namespace = FALSE, has_children;
998 cache = w->class_to_vtype_die;
1000 cache = w->class_to_die;
1002 die = g_hash_table_lookup (cache, klass);
1006 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) ||
1007 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
1011 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
1014 if (klass->name_space && klass->name_space [0] != '\0')
1015 emit_namespace = TRUE;
1017 if (emit_namespace) {
1018 emit_uleb128 (w, ABBREV_NAMESPACE);
1019 emit_string (w, klass->name_space);
1022 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
1024 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
1025 * to separate components.
1027 for (p = full_name; *p; p ++)
1031 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
1032 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
1033 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
1036 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
1037 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
1038 g_hash_table_insert (cache, klass, die);
1040 if (klass->enumtype) {
1041 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
1043 emit_label (w, die);
1045 emit_uleb128 (w, ABBREV_ENUM_TYPE);
1046 emit_string (w, full_name);
1047 emit_uleb128 (w, size);
1048 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
1049 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
1051 g_assert (k < G_N_ELEMENTS (basic_types));
1052 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
1054 /* Emit enum values */
1056 while ((field = mono_class_get_fields (klass, &iter))) {
1058 MonoTypeEnum def_type;
1060 if (strcmp ("value__", mono_field_get_name (field)) == 0)
1062 if (mono_field_is_deleted (field))
1065 emit_uleb128 (w, ABBREV_ENUMERATOR);
1066 emit_string (w, mono_field_get_name (field));
1068 p = mono_class_get_field_default_value (field, &def_type);
1069 /* len = */ mono_metadata_decode_blob_size (p, &p);
1070 switch (mono_class_enum_basetype (klass)->type) {
1073 case MONO_TYPE_BOOLEAN:
1074 emit_sleb128 (w, *p);
1078 case MONO_TYPE_CHAR:
1079 emit_sleb128 (w, read16 (p));
1083 emit_sleb128 (w, read32 (p));
1087 emit_sleb128 (w, read64 (p));
1091 #if SIZEOF_VOID_P == 8
1092 emit_sleb128 (w, read64 (p));
1094 emit_sleb128 (w, read32 (p));
1098 g_assert_not_reached ();
1102 has_children = TRUE;
1109 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1113 /* Emit field types */
1115 while ((field = mono_class_get_fields (klass, &iter))) {
1116 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1119 emit_type (w, field->type);
1123 has_children = parent_die || mono_class_get_fields (klass, &iter);
1125 emit_label (w, die);
1127 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1128 emit_string (w, full_name);
1129 emit_uleb128 (w, klass->instance_size);
1132 emit_uleb128 (w, ABBREV_INHERITANCE);
1133 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1136 *p ++= DW_OP_plus_uconst;
1137 encode_uleb128 (0, p, &p);
1138 emit_byte (w, p - buf);
1139 emit_bytes (w, buf, p - buf);
1144 while ((field = mono_class_get_fields (klass, &iter))) {
1145 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1148 fdie = get_type_die (w, field->type);
1150 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1151 emit_string (w, field->name);
1152 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1155 *p ++= DW_OP_plus_uconst;
1156 if (klass->valuetype && vtype)
1157 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1159 encode_uleb128 (field->offset, p, &p);
1161 emit_byte (w, p - buf);
1162 emit_bytes (w, buf, p - buf);
1169 emit_uleb128 (w, 0x0);
1171 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1172 emit_uleb128 (w, ABBREV_TYPEDEF);
1173 emit_string (w, full_name);
1174 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1176 /* Add a pointer type */
1177 emit_label (w, pointer_die);
1179 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1180 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1182 /* Add a reference type */
1183 emit_label (w, reference_die);
1185 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1186 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1190 if (emit_namespace) {
1192 emit_uleb128 (w, 0x0);
1198 static gboolean base_types_emitted [64];
1201 get_type_die (MonoDwarfWriter *w, MonoType *t)
1203 MonoClass *klass = mono_class_from_mono_type (t);
1208 if (t->type == MONO_TYPE_VALUETYPE) {
1209 tdie = g_hash_table_lookup (w->class_to_pointer_die, klass);
1212 tdie = get_class_die (w, klass, FALSE);
1213 /* Should return a pointer type to a reference */
1216 t = &mono_defaults.int_class->byval_arg;
1218 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1219 if (basic_types [j].type == t->type)
1221 if (j < G_N_ELEMENTS (basic_types)) {
1222 tdie = basic_types [j].die_name;
1225 case MONO_TYPE_CLASS:
1226 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1227 //tdie = ".LDIE_OBJECT";
1229 case MONO_TYPE_ARRAY:
1230 tdie = ".LDIE_OBJECT";
1232 case MONO_TYPE_VALUETYPE:
1233 if (klass->enumtype)
1234 tdie = get_class_die (w, klass, FALSE);
1238 case MONO_TYPE_GENERICINST:
1239 if (!MONO_TYPE_ISSTRUCT (t)) {
1240 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1260 emit_type (MonoDwarfWriter *w, MonoType *t)
1262 MonoClass *klass = mono_class_from_mono_type (t);
1267 if (t->type == MONO_TYPE_VALUETYPE) {
1268 tdie = emit_class_dwarf_info (w, klass, TRUE);
1273 emit_class_dwarf_info (w, klass, FALSE);
1276 t = &mono_defaults.int_class->byval_arg;
1278 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1279 if (basic_types [j].type == t->type)
1281 if (j < G_N_ELEMENTS (basic_types)) {
1282 /* Emit a boxed version of base types */
1283 if (j < 64 && !base_types_emitted [j]) {
1284 emit_class_dwarf_info (w, klass, FALSE);
1285 base_types_emitted [j] = TRUE;
1289 case MONO_TYPE_CLASS:
1290 emit_class_dwarf_info (w, klass, FALSE);
1292 case MONO_TYPE_ARRAY:
1294 case MONO_TYPE_VALUETYPE:
1295 if (klass->enumtype)
1296 emit_class_dwarf_info (w, klass, FALSE);
1298 case MONO_TYPE_GENERICINST:
1299 if (!MONO_TYPE_ISSTRUCT (t))
1300 emit_class_dwarf_info (w, klass, FALSE);
1311 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1315 tdie = get_type_die (w, t);
1317 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1321 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1324 /* FIXME: This needs a location list, since the args can go from reg->stack */
1325 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1326 /* gdb treats this as optimized out */
1327 } else if (ins->opcode == OP_REGVAR) {
1328 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1330 } else if (ins->opcode == OP_REGOFFSET) {
1331 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1332 encode_sleb128 (ins->inst_offset, p, &p);
1342 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1343 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1344 guint8 *expr, guint32 expr_len)
1348 emit_push_section (w, ".debug_loc", 0);
1349 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1350 emit_label (w, label);
1352 emit_pointer_value (w, loclist_begin_addr);
1353 emit_pointer_value (w, loclist_end_addr);
1354 emit_byte (w, expr_len % 256);
1355 emit_byte (w, expr_len / 256);
1356 emit_bytes (w, expr, expr_len);
1358 emit_pointer_value (w, NULL);
1359 emit_pointer_value (w, NULL);
1361 emit_pop_section (w);
1362 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1366 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1367 * it is a public header.
1369 static const guint8 *token_handler_ip;
1372 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1376 MonoMethod *cmethod;
1378 MonoClassField *field;
1379 gpointer data = NULL;
1381 if (method->wrapper_type)
1382 data = mono_method_get_wrapper_data (method, token);
1384 switch (*token_handler_ip) {
1388 if (method->wrapper_type) {
1391 klass = mono_class_get_checked (method->klass->image, token, &error);
1392 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1394 res = g_strdup_printf ("<%s>", klass->name);
1399 if (method->wrapper_type)
1402 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1403 desc = mono_method_full_name (cmethod, TRUE);
1404 res = g_strdup_printf ("<%s>", desc);
1408 if (method->wrapper_type) {
1409 desc = mono_signature_get_desc (data, FALSE);
1410 res = g_strdup_printf ("<%s>", desc);
1413 res = g_strdup_printf ("<0x%08x>", token);
1420 if (method->wrapper_type) {
1423 field = mono_field_from_token_checked (method->klass->image, token, &klass, NULL, &error);
1424 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1426 desc = mono_field_full_name (field);
1427 res = g_strdup_printf ("<%s>", desc);
1431 res = g_strdup_printf ("<0x%08x>", token);
1441 * Produce a disassembled form of the IL instruction at IP. This is an extension
1442 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1443 * CEE_MONO_ opcodes.
1446 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1450 MonoMethodHeader *header = mono_method_get_header (method);
1452 memset (&dh, 0, sizeof (dh));
1454 dh.label_format = "IL_%04x: ";
1455 dh.label_target = "IL_%04x";
1456 dh.tokener = token_handler;
1458 token_handler_ip = ip;
1459 if (*ip == MONO_CUSTOM_PREFIX) {
1464 case CEE_MONO_ICALL: {
1465 MonoJitICallInfo *info;
1467 token = read32 (ip + 2);
1468 data = mono_method_get_wrapper_data (method, token);
1469 info = mono_find_jit_icall_by_addr (data);
1472 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1476 case CEE_MONO_CLASSCONST: {
1477 token = read32 (ip + 2);
1478 data = mono_method_get_wrapper_data (method, token);
1480 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1485 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1488 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1490 token_handler_ip = NULL;
1493 mono_metadata_free_mh (header);
1498 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1499 guint32 native_offset)
1503 if (!jit->line_numbers)
1506 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1507 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1509 if (lne.native_offset <= native_offset)
1510 return lne.il_offset;
1516 static int max_special_addr_diff = 0;
1519 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1523 /* Use a special opcode if possible */
1524 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1525 if (max_special_addr_diff == 0)
1526 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1528 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1529 emit_byte (w, DW_LNS_const_add_pc);
1530 addr_diff -= max_special_addr_diff;
1533 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1539 emit_byte (w, opcode);
1541 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1542 emit_byte (w, DW_LNS_advance_line);
1543 emit_sleb128 (w, line_diff);
1544 emit_byte (w, DW_LNS_advance_pc);
1545 emit_sleb128 (w, addr_diff);
1546 emit_byte (w, DW_LNS_copy);
1551 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1553 if (a->native_offset == b->native_offset)
1554 return a->il_offset - b->il_offset;
1556 return a->native_offset - b->native_offset;
1560 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1561 char *start_symbol, char *end_symbol,
1562 guint8 *code, guint32 code_size,
1563 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 (method);
1572 MonoDebugMethodInfo *minfo;
1573 MonoDebugLineNumberEntry *ln_array;
1574 int *native_to_il_offset = NULL;
1576 if (!w->emit_line) {
1577 mono_metadata_free_mh (header);
1581 minfo = mono_debug_lookup_method (method);
1583 /* Compute the native->IL offset mapping */
1585 g_assert (code_size);
1587 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1588 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1590 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
1592 native_to_il_offset = g_new0 (int, code_size + 1);
1594 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1596 MonoDebugLineNumberEntry *lne = &ln_array [i];
1599 for (j = 0; j < lne->native_offset; ++j)
1600 native_to_il_offset [j] = -1;
1603 if (i < debug_info->num_line_numbers - 1) {
1604 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1606 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1607 native_to_il_offset [j] = lne->il_offset;
1609 for (j = lne->native_offset; j < code_size; ++j)
1610 native_to_il_offset [j] = lne->il_offset;
1616 prev_il_offset = -1;
1618 w->cur_file_index = -1;
1619 for (i = 0; i < code_size; ++i) {
1620 int line_diff, addr_diff;
1625 if (!debug_info->line_numbers)
1628 if (native_to_il_offset)
1629 il_offset = native_to_il_offset [i];
1631 il_offset = il_offset_from_address (method, debug_info, i);
1633 il_offset = il_offset_from_address (method, debug_info, i);
1635 g_assert (il_offset == native_to_il_offset [i]);
1638 il_offset = native_to_il_offset [i];
1642 if (il_offset == prev_il_offset)
1645 prev_il_offset = il_offset;
1647 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1650 if (!loc->source_file) {
1651 mono_debug_symfile_free_location (loc);
1655 line_diff = (gint32)loc->row - (gint32)prev_line;
1656 addr_diff = i - prev_native_offset;
1659 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1662 emit_byte (w, sizeof (gpointer) + 1);
1663 emit_byte (w, DW_LNE_set_address);
1665 emit_pointer_unaligned (w, start_symbol);
1667 emit_pointer_value (w, code);
1671 if (loc->row != prev_line) {
1672 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1673 /* Add an entry to the file table */
1674 /* FIXME: Avoid duplicates */
1675 if (w->collect_line_info)
1676 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1678 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1679 g_free (prev_file_name);
1680 prev_file_name = g_strdup (loc->source_file);
1682 if (w->cur_file_index != file_index) {
1683 emit_byte (w, DW_LNS_set_file);
1684 emit_uleb128 (w, file_index);
1685 emit_byte (w, DW_LNS_copy);
1686 w->cur_file_index = file_index;
1691 if (loc->row != prev_line) {
1692 if (prev_native_offset == 0)
1693 emit_byte (w, DW_LNE_set_prologue_end);
1695 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1696 emit_advance_op (w, line_diff, addr_diff);
1698 prev_line = loc->row;
1699 prev_native_offset = i;
1702 mono_debug_symfile_free_location (loc);
1706 g_free (native_to_il_offset);
1707 g_free (prev_file_name);
1710 emit_byte (w, DW_LNS_advance_pc);
1711 emit_sleb128 (w, code_size - prev_native_offset);
1712 emit_byte (w, DW_LNS_copy);
1716 emit_byte (w, DW_LNE_end_sequence);
1717 } else if (!start_symbol) {
1718 /* No debug info, XDEBUG mode */
1720 const guint8 *ip = header->code;
1721 int prev_line, prev_native_offset;
1725 * Emit the IL code into a temporary file and emit line number info
1726 * referencing that file.
1729 name = mono_method_full_name (method, TRUE);
1730 fprintf (w->il_file, "// %s\n", name);
1731 w->il_file_line_index ++;
1734 il_to_line = g_new0 (int, header->code_size);
1736 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1738 emit_byte (w, sizeof (gpointer) + 1);
1739 emit_byte (w, DW_LNE_set_address);
1740 emit_pointer_value (w, code);
1742 // FIXME: Optimize this
1743 while (ip < header->code + header->code_size) {
1744 int il_offset = ip - header->code;
1747 w->il_file_line_index ++;
1749 dis = disasm_ins (method, ip, &ip);
1750 fprintf (w->il_file, "%s\n", dis);
1753 il_to_line [il_offset] = w->il_file_line_index;
1756 /* Emit line number info */
1758 prev_native_offset = 0;
1759 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1760 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1763 if (lne->il_offset >= header->code_size)
1765 line = il_to_line [lne->il_offset];
1768 * This seems to happen randomly, it looks like il_offset points
1769 * into the middle of an instruction.
1773 printf ("%s\n", mono_method_full_name (method, TRUE));
1774 printf ("%d %d\n", lne->il_offset, header->code_size);
1779 if (line - prev_line != 0) {
1780 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1783 prev_native_offset = lne->native_offset;
1787 emit_byte (w, DW_LNS_advance_pc);
1788 emit_sleb128 (w, code_size - prev_native_offset);
1789 emit_byte (w, DW_LNS_copy);
1793 emit_byte (w, DW_LNE_end_sequence);
1795 fflush (w->il_file);
1796 g_free (il_to_line);
1798 mono_metadata_free_mh (header);
1801 static MonoMethodVar*
1802 find_vmv (MonoCompile *cfg, MonoInst *ins)
1807 for (j = 0; j < cfg->num_varinfo; ++j) {
1808 if (cfg->varinfo [j] == ins)
1812 if (j < cfg->num_varinfo) {
1813 return MONO_VARINFO (cfg, j);
1821 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1822 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 (method);
1840 /* Parameter types */
1841 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1844 if (i == 0 && sig->hasthis) {
1845 if (method->klass->valuetype)
1846 t = &method->klass->this_arg;
1848 t = &method->klass->byval_arg;
1850 t = sig->params [i - sig->hasthis];
1855 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1858 for (i = 0; i < header->num_locals; ++i) {
1859 emit_type (w, header->locals [i]);
1862 minfo = mono_debug_lookup_method (method);
1864 loc = mono_debug_symfile_lookup_location (minfo, 0);
1867 names = g_new0 (char *, sig->param_count);
1868 mono_method_get_param_names (method, (const char **) names);
1870 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1872 name = mono_method_full_name (method, FALSE);
1873 emit_string (w, name);
1874 /* DW_AT_MIPS_linkage_name */
1876 emit_string (w, linkage_name);
1878 emit_string (w, "");
1879 /* DW_AT_decl_file/DW_AT_decl_line */
1881 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1882 emit_uleb128 (w, file_index + 1);
1883 emit_uleb128 (w, loc->row);
1885 mono_debug_symfile_free_location (loc);
1888 emit_uleb128 (w, 0);
1889 emit_uleb128 (w, 0);
1892 emit_string (w, name);
1896 emit_pointer_unaligned (w, start_symbol);
1897 emit_pointer_unaligned (w, end_symbol);
1899 emit_pointer_value (w, code);
1900 emit_pointer_value (w, code + code_size);
1904 emit_byte (w, DW_OP_breg6);
1908 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1909 MonoInst *arg = args ? args [i] : NULL;
1912 char pname_buf [128];
1913 MonoMethodVar *vmv = NULL;
1914 gboolean need_loclist = FALSE;
1916 vmv = find_vmv (cfg, arg);
1917 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1918 need_loclist = TRUE;
1920 if (i == 0 && sig->hasthis) {
1921 if (method->klass->valuetype)
1922 t = &method->klass->this_arg;
1924 t = &method->klass->byval_arg;
1927 t = sig->params [i - sig->hasthis];
1928 pname = names [i - sig->hasthis];
1931 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1933 if (pname[0] == '\0') {
1934 sprintf (pname_buf, "param%d", i - sig->hasthis);
1937 emit_string (w, pname);
1939 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1940 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1942 emit_var_type (w, t);
1945 encode_var_location (w, arg, p, &p);
1947 vmv->live_range_start = 0;
1948 if (vmv->live_range_end == 0)
1949 /* FIXME: Uses made in calls are not recorded */
1950 vmv->live_range_end = code_size;
1951 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1953 emit_byte (w, p - buf);
1954 emit_bytes (w, buf, p - buf);
1960 locals_info = mono_debug_lookup_locals (method);
1962 for (i = 0; i < header->num_locals; ++i) {
1963 MonoInst *ins = locals [i];
1964 char name_buf [128];
1966 MonoMethodVar *vmv = NULL;
1967 gboolean need_loclist = FALSE;
1970 /* ins->dreg no longer contains the original vreg */
1971 vmv = find_vmv (cfg, ins);
1973 if (vmv->live_range_start) {
1974 /* This variable has a precise live range */
1975 need_loclist = TRUE;
1979 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1983 for (j = 0; j < locals_info->num_locals; ++j)
1984 if (locals_info->locals [j].index == i)
1986 if (j < locals_info->num_locals)
1987 lname = locals_info->locals [j].name;
1990 emit_string (w, lname);
1992 sprintf (name_buf, "V_%d", i);
1993 emit_string (w, name_buf);
1996 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1997 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1999 emit_var_type (w, header->locals [i]);
2002 encode_var_location (w, ins, p, &p);
2005 if (vmv->live_range_end == 0)
2006 /* FIXME: Uses made in calls are not recorded */
2007 vmv->live_range_end = code_size;
2008 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
2010 emit_byte (w, p - buf);
2011 emit_bytes (w, buf, p - buf);
2016 mono_debug_free_locals (locals_info);
2018 /* Subprogram end */
2019 emit_uleb128 (w, 0x0);
2023 emit_debug_info_end (w);
2025 /* Emit unwind info */
2027 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
2031 /* Emit line number info */
2032 /* != could happen when using --regression */
2033 if (debug_info && (debug_info->code_start == code)) {
2034 if (w->collect_line_info) {
2035 MethodLineNumberInfo *info;
2037 /* Save the information needed to emit the line number info later at once */
2038 info = g_new0 (MethodLineNumberInfo, 1);
2039 info->method = method;
2040 info->start_symbol = g_strdup (start_symbol);
2041 info->end_symbol = g_strdup (end_symbol);
2043 info->code_size = code_size;
2044 w->line_info = g_slist_prepend (w->line_info, info);
2046 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
2051 mono_metadata_free_mh (header);
2055 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)
2057 emit_section_change (w, ".debug_info", 0);
2060 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
2061 emit_string (w, tramp_name);
2062 emit_pointer_value (w, code);
2063 emit_pointer_value (w, code + code_size);
2065 /* Subprogram end */
2066 emit_uleb128 (w, 0x0);
2068 emit_debug_info_end (w);
2070 /* Emit unwind info */
2071 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2074 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */