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>
33 struct _MonoDwarfWriter
36 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
37 GHashTable *class_to_reference_die;
38 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
39 GHashTable *file_to_index, *dir_to_index;
41 int il_file_line_index, loclist_index;
44 const char *temp_prefix;
45 gboolean emit_line, appending;
49 * mono_dwarf_writer_create:
51 * Create a DWARF writer object. WRITER is the underlying image writer this
52 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
53 * methods which have no line number info. It can be NULL.
54 * If APPENDING is TRUE, the output file will be in assembleable state after each
55 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
56 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
60 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean appending)
62 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
65 * The appending flag is needed because we use subsections to order things in
66 * the debug info, and:
67 * - apple's assembler doesn't support them
68 * - the binary writer has problems with subsections+alignment
69 * So instead of subsections, we use the _close () function in AOT mode,
70 * which writes out things in order.
75 w->il_file_line_index = il_file_start_line;
76 w->appending = appending;
79 g_assert (img_writer_subsections_supported (w->w));
81 w->fp = img_writer_get_fp (w->w);
82 w->temp_prefix = img_writer_get_temp_label_prefix (w->w);
88 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
94 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
96 return w->il_file_line_index;
99 /* Wrappers around the image writer functions */
102 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
104 img_writer_emit_section_change (w->w, section_name, subsection_index);
108 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
110 img_writer_emit_push_section (w->w, section_name, subsection);
114 emit_pop_section (MonoDwarfWriter *w)
116 img_writer_emit_pop_section (w->w);
120 emit_local_symbol (MonoDwarfWriter *w, const char *name, const char *end_label, gboolean func)
122 img_writer_emit_local_symbol (w->w, name, end_label, func);
126 emit_label (MonoDwarfWriter *w, const char *name)
128 img_writer_emit_label (w->w, name);
132 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
134 img_writer_emit_bytes (w->w, buf, size);
138 emit_string (MonoDwarfWriter *w, const char *value)
140 img_writer_emit_string (w->w, value);
144 emit_line (MonoDwarfWriter *w)
146 img_writer_emit_line (w->w);
150 emit_alignment (MonoDwarfWriter *w, int size)
152 img_writer_emit_alignment (w->w, size);
156 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
158 img_writer_emit_pointer_unaligned (w->w, target);
162 emit_pointer (MonoDwarfWriter *w, const char *target)
164 img_writer_emit_pointer (w->w, target);
168 emit_int16 (MonoDwarfWriter *w, int value)
170 img_writer_emit_int16 (w->w, value);
174 emit_int32 (MonoDwarfWriter *w, int value)
176 img_writer_emit_int32 (w->w, value);
180 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
182 img_writer_emit_symbol_diff (w->w, end, start, offset);
186 emit_zero_bytes (MonoDwarfWriter *w, int num)
188 img_writer_emit_zero_bytes (w->w, num);
192 emit_byte (MonoDwarfWriter *w, guint8 val)
194 img_writer_emit_byte (w->w, val);
197 static G_GNUC_UNUSED void
198 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
201 guint8 b = value & 0x7f;
203 if (value != 0) /* more bytes to come */
209 static G_GNUC_UNUSED void
210 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
213 gboolean negative = (value < 0);
220 /* the following is unnecessary if the
221 * implementation of >>= uses an arithmetic rather
222 * than logical shift for a signed left operand
226 value |= - ((gint64)1 <<(size - 7));
227 /* sign bit of byte is second high order bit (0x40) */
228 if ((value == 0 && !(byte & 0x40)) ||
229 (value == -1 && (byte & 0x40)))
237 static G_GNUC_UNUSED void
238 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
243 guint8 b = value & 0x7f;
245 if (value != 0) /* more bytes to come */
253 static G_GNUC_UNUSED void
254 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
257 gboolean negative = (value < 0);
265 /* the following is unnecessary if the
266 * implementation of >>= uses an arithmetic rather
267 * than logical shift for a signed left operand
271 value |= - (1 <<(size - 7));
272 /* sign bit of byte is second high order bit (0x40) */
273 if ((value == 0 && !(byte & 0x40)) ||
274 (value == -1 && (byte & 0x40)))
285 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
286 int *attrs, int attrs_len)
290 emit_uleb128 (w, code);
291 emit_uleb128 (w, tag);
292 emit_byte (w, has_child);
294 for (i = 0; i < attrs_len; i++)
295 emit_uleb128 (w, attrs [i]);
301 emit_cie (MonoDwarfWriter *w)
303 emit_section_change (w, ".debug_frame", 0);
305 emit_alignment (w, 8);
308 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
309 emit_label (w, ".Lcie0_start");
310 emit_int32 (w, 0xffffffff); /* CIE id */
311 emit_byte (w, 3); /* version */
312 emit_string (w, ""); /* augmention */
313 emit_sleb128 (w, 1); /* code alignment factor */
314 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
315 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
317 w->cie_program = w->cie_program;
318 if (w->cie_program) {
320 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
321 emit_bytes (w, uw_info, uw_info_len);
325 emit_alignment (w, sizeof (gpointer));
326 emit_label (w, ".Lcie0_end");
330 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
332 gssize val = (gssize)ptr;
333 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
337 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
338 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
346 emit_section_change (w, ".debug_frame", 0);
348 sprintf (symbol1, ".Lfde%d_start", fde_index);
349 sprintf (symbol2, ".Lfde%d_end", fde_index);
350 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
351 emit_label (w, symbol1);
352 emit_int32 (w, 0); /* CIE_pointer */
354 emit_pointer (w, start_symbol); /* initial_location */
356 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
358 g_assert (code_size);
359 emit_int32 (w, code_size);
362 emit_pointer_value (w, code);
363 emit_int32 (w, code_size);
365 #if SIZEOF_VOID_P == 8
366 /* Upper 32 bits of code size */
371 if (w->cie_program) {
372 // FIXME: Check that the ops really begin with the CIE program */
375 for (i = 0; i < g_slist_length (w->cie_program); ++i)
380 /* Convert the list of MonoUnwindOps to the format used by DWARF */
381 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
382 emit_bytes (w, uw_info, uw_info_len);
385 emit_alignment (w, sizeof (mgreg_t));
386 emit_label (w, symbol2);
390 #define ABBREV_COMPILE_UNIT 1
391 #define ABBREV_SUBPROGRAM 2
392 #define ABBREV_PARAM 3
393 #define ABBREV_BASE_TYPE 4
394 #define ABBREV_STRUCT_TYPE 5
395 #define ABBREV_DATA_MEMBER 6
396 #define ABBREV_TYPEDEF 7
397 #define ABBREV_ENUM_TYPE 8
398 #define ABBREV_ENUMERATOR 9
399 #define ABBREV_NAMESPACE 10
400 #define ABBREV_VARIABLE 11
401 #define ABBREV_VARIABLE_LOCLIST 12
402 #define ABBREV_POINTER_TYPE 13
403 #define ABBREV_REFERENCE_TYPE 14
404 #define ABBREV_PARAM_LOCLIST 15
405 #define ABBREV_INHERITANCE 16
406 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
408 static int compile_unit_attr [] = {
409 DW_AT_producer ,DW_FORM_string,
410 DW_AT_name ,DW_FORM_string,
411 DW_AT_comp_dir ,DW_FORM_string,
412 DW_AT_language ,DW_FORM_data1,
413 DW_AT_low_pc ,DW_FORM_addr,
414 DW_AT_high_pc ,DW_FORM_addr,
415 DW_AT_stmt_list ,DW_FORM_data4
418 static int subprogram_attr [] = {
419 DW_AT_name , DW_FORM_string,
420 DW_AT_low_pc , DW_FORM_addr,
421 DW_AT_high_pc , DW_FORM_addr,
422 DW_AT_frame_base , DW_FORM_block1
425 static int param_attr [] = {
426 DW_AT_name, DW_FORM_string,
427 DW_AT_type, DW_FORM_ref4,
428 DW_AT_location, DW_FORM_block1
431 static int param_loclist_attr [] = {
432 DW_AT_name, DW_FORM_string,
433 DW_AT_type, DW_FORM_ref4,
434 DW_AT_location, DW_FORM_data4
437 static int base_type_attr [] = {
438 DW_AT_byte_size, DW_FORM_data1,
439 DW_AT_encoding, DW_FORM_data1,
440 DW_AT_name, DW_FORM_string
443 static int struct_type_attr [] = {
444 DW_AT_name, DW_FORM_string,
445 DW_AT_byte_size, DW_FORM_udata,
448 static int data_member_attr [] = {
449 DW_AT_name, DW_FORM_string,
450 DW_AT_type, DW_FORM_ref4,
451 DW_AT_data_member_location, DW_FORM_block1
454 static int typedef_attr [] = {
455 DW_AT_name, DW_FORM_string,
456 DW_AT_type, DW_FORM_ref4
459 static int pointer_type_attr [] = {
460 DW_AT_type, DW_FORM_ref4,
463 static int reference_type_attr [] = {
464 DW_AT_type, DW_FORM_ref4,
467 static int enum_type_attr [] = {
468 DW_AT_name, DW_FORM_string,
469 DW_AT_byte_size, DW_FORM_udata,
470 DW_AT_type, DW_FORM_ref4,
473 static int enumerator_attr [] = {
474 DW_AT_name, DW_FORM_string,
475 DW_AT_const_value, DW_FORM_sdata,
478 static int namespace_attr [] = {
479 DW_AT_name, DW_FORM_string,
482 static int variable_attr [] = {
483 DW_AT_name, DW_FORM_string,
484 DW_AT_type, DW_FORM_ref4,
485 DW_AT_location, DW_FORM_block1
488 static int variable_loclist_attr [] = {
489 DW_AT_name, DW_FORM_string,
490 DW_AT_type, DW_FORM_ref4,
491 DW_AT_location, DW_FORM_data4
494 static int inheritance_attr [] = {
495 DW_AT_type, DW_FORM_ref4,
496 DW_AT_data_member_location, DW_FORM_block1
499 typedef struct DwarfBasicType {
500 const char *die_name, *name;
506 static DwarfBasicType basic_types [] = {
507 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
508 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
509 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
510 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
511 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
512 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
513 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
514 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
515 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
516 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
517 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
518 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
519 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
520 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
521 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
522 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
523 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
526 /* Constants for encoding line number special opcodes */
527 #define OPCODE_BASE 13
529 #define LINE_RANGE 14
531 /* Subsections of the .debug_line section */
532 #define LINE_SUBSECTION_HEADER 1
533 #define LINE_SUBSECTION_INCLUDES 2
534 #define LINE_SUBSECTION_FILES 3
535 #define LINE_SUBSECTION_DATA 4
536 #define LINE_SUBSECTION_END 5
539 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
540 gint64 last_mod_time, gint64 file_size)
544 char *basename = NULL;
546 if (!w->file_to_index)
547 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
549 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
553 if (g_path_is_absolute (name)) {
554 char *dir = g_path_get_dirname (name);
556 if (!w->dir_to_index)
557 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
559 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
560 if (dir_index == 0) {
561 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
562 emit_string (w, dir);
564 dir_index = ++ w->line_number_dir_index;
565 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
570 basename = g_path_get_basename (name);
575 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
578 emit_string (w, basename);
580 emit_string (w, name);
581 emit_uleb128 (w, dir_index);
585 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
590 index = ++ w->line_number_file_index;
591 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
597 emit_line_number_info_begin (MonoDwarfWriter *w)
599 /* Line number info header */
601 * GAS seems to emit its own data to the end of the first subsection, so we use
602 * subsections 1, 2 etc:
603 * 1 - contains the header
604 * 2 - contains the file names
605 * 3 - contains the end of the header + the data
608 emit_section_change (w, ".debug_line", 0);
609 emit_label (w, ".Ldebug_line_section_start");
610 emit_section_change (w, ".debug_line", LINE_SUBSECTION_HEADER);
611 emit_label (w, ".Ldebug_line_start");
612 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
613 emit_int16 (w, 0x2); /* version */
614 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
615 emit_byte (w, 1); /* minimum_instruction_length */
616 emit_byte (w, 1); /* default_is_stmt */
617 emit_byte (w, LINE_BASE); /* line_base */
618 emit_byte (w, LINE_RANGE); /* line_range */
619 emit_byte (w, OPCODE_BASE); /* opcode_base */
620 emit_byte (w, 0); /* standard_opcode_lengths */
634 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
636 /* End of Includes */
637 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
641 emit_line_number_file_name (w, "xdb.il", 0, 0);
644 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
647 emit_label (w, ".Ldebug_line_header_end");
649 /* Emit this into a separate subsection so it gets placed at the end */
650 emit_section_change (w, ".debug_line", LINE_SUBSECTION_END);
654 emit_byte (w, DW_LNE_end_sequence);
656 emit_label (w, ".Ldebug_line_end");
660 * Some assemblers like apple's do not support subsections, so we can't place
661 * .Ldebug_info_end at the end of the section using subsections. Instead, we
662 * define it every time something gets added to the .debug_info section.
663 * The apple assember seems to use the last definition.
666 emit_debug_info_end (MonoDwarfWriter *w)
668 /* This doesn't seem to work/required with recent iphone sdk versions */
670 if (!img_writer_subsections_supported (w->w))
671 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
676 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, GSList *base_unwind_program)
678 char *s, *build_info;
681 if (!img_writer_subsections_supported (w->w))
682 /* Can't emit line number info without subsections */
683 w->emit_line = FALSE;
687 w->cie_program = base_unwind_program;
689 emit_section_change (w, ".debug_abbrev", 0);
690 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
691 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
692 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
693 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
694 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
695 param_attr, G_N_ELEMENTS (param_attr));
696 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
697 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
698 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
699 base_type_attr, G_N_ELEMENTS (base_type_attr));
700 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
701 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
702 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
703 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
704 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
705 data_member_attr, G_N_ELEMENTS (data_member_attr));
706 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
707 typedef_attr, G_N_ELEMENTS (typedef_attr));
708 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
709 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
710 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
711 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
712 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
713 namespace_attr, G_N_ELEMENTS (namespace_attr));
714 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
715 variable_attr, G_N_ELEMENTS (variable_attr));
716 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
717 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
718 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
719 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
720 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
721 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
722 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
723 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
726 emit_section_change (w, ".debug_info", 0);
727 emit_label (w, ".Ldebug_info_start");
728 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
729 emit_label (w, ".Ldebug_info_begin");
730 emit_int16 (w, 0x2); /* DWARF version 2 */
731 emit_int32 (w, 0); /* .debug_abbrev offset */
732 emit_byte (w, sizeof (gpointer)); /* address size */
734 if (img_writer_subsections_supported (w->w) && w->appending) {
735 /* Emit this into a separate section so it gets placed at the end */
736 emit_section_change (w, ".debug_info", 1);
737 emit_byte (w, 0); /* close COMPILE_UNIT */
738 emit_label (w, ".Ldebug_info_end");
739 emit_section_change (w, ".debug_info", 0);
742 /* Compilation unit */
743 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
744 build_info = mono_get_runtime_build_info ();
745 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
749 emit_string (w, "JITted code");
751 emit_byte (w, DW_LANG_C);
752 emit_pointer_value (w, 0);
753 emit_pointer_value (w, 0);
754 /* offset into .debug_line section */
755 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
758 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
759 emit_label (w, basic_types [i].die_name);
760 emit_uleb128 (w, ABBREV_BASE_TYPE);
761 emit_byte (w, basic_types [i].size);
762 emit_byte (w, basic_types [i].encoding);
763 emit_string (w, basic_types [i].name);
766 emit_debug_info_end (w);
768 /* debug_loc section */
769 emit_section_change (w, ".debug_loc", 0);
770 emit_label (w, ".Ldebug_loc_start");
772 /* debug_line section */
774 * We emit some info even if emit_line is FALSE, as the
775 * apple linker seems to require a .debug_line section.
777 emit_line_number_info_begin (w);
783 * mono_dwarf_writer_close:
785 * Finalize the emitted debugging info.
788 mono_dwarf_writer_close (MonoDwarfWriter *w)
791 emit_section_change (w, ".debug_info", 0);
792 emit_byte (w, 0); /* close COMPILE_UNIT */
793 emit_label (w, ".Ldebug_info_end");
797 static const char* emit_type (MonoDwarfWriter *w, MonoType *t);
799 /* Returns the local symbol pointing to the emitted debug info */
801 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
803 char *die, *pointer_die, *reference_die;
806 MonoClassField *field;
809 gboolean emit_namespace = FALSE, has_children;
813 if (!w->class_to_die)
814 w->class_to_die = g_hash_table_new (NULL, NULL);
815 if (!w->class_to_vtype_die)
816 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
817 if (!w->class_to_pointer_die)
818 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
819 if (!w->class_to_reference_die)
820 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
823 cache = w->class_to_vtype_die;
825 cache = w->class_to_die;
827 die = g_hash_table_lookup (cache, klass);
831 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) ||
832 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
836 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
839 if (klass->name_space && klass->name_space [0] != '\0')
840 emit_namespace = TRUE;
842 if (emit_namespace) {
843 emit_uleb128 (w, ABBREV_NAMESPACE);
844 emit_string (w, klass->name_space);
847 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
849 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
850 * to separate components.
852 for (p = full_name; *p; p ++)
856 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
857 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
858 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
861 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
862 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
863 g_hash_table_insert (cache, klass, die);
865 if (klass->enumtype) {
866 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
870 emit_uleb128 (w, ABBREV_ENUM_TYPE);
871 emit_string (w, full_name);
872 emit_uleb128 (w, size);
873 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
874 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
876 g_assert (k < G_N_ELEMENTS (basic_types));
877 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
879 /* Emit enum values */
881 while ((field = mono_class_get_fields (klass, &iter))) {
884 MonoTypeEnum def_type;
886 if (strcmp ("value__", mono_field_get_name (field)) == 0)
888 if (mono_field_is_deleted (field))
891 emit_uleb128 (w, ABBREV_ENUMERATOR);
892 emit_string (w, mono_field_get_name (field));
894 p = mono_class_get_field_default_value (field, &def_type);
895 len = mono_metadata_decode_blob_size (p, &p);
896 switch (mono_class_enum_basetype (klass)->type) {
899 case MONO_TYPE_BOOLEAN:
900 emit_sleb128 (w, *p);
905 emit_sleb128 (w, read16 (p));
909 emit_sleb128 (w, read32 (p));
913 emit_sleb128 (w, read64 (p));
917 #if SIZEOF_VOID_P == 8
918 emit_sleb128 (w, read64 (p));
920 emit_sleb128 (w, read32 (p));
924 g_assert_not_reached ();
935 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
939 /* Emit field types */
941 while ((field = mono_class_get_fields (klass, &iter))) {
942 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
945 emit_type (w, field->type);
949 has_children = parent_die || mono_class_get_fields (klass, &iter);
953 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
954 emit_string (w, full_name);
955 emit_uleb128 (w, klass->instance_size);
958 emit_uleb128 (w, ABBREV_INHERITANCE);
959 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
962 *p ++= DW_OP_plus_uconst;
963 encode_uleb128 (0, p, &p);
964 emit_byte (w, p - buf);
965 emit_bytes (w, buf, p - buf);
970 while ((field = mono_class_get_fields (klass, &iter))) {
971 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
974 fdie = emit_type (w, field->type);
976 emit_uleb128 (w, ABBREV_DATA_MEMBER);
977 emit_string (w, field->name);
978 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
981 *p ++= DW_OP_plus_uconst;
982 if (klass->valuetype && vtype)
983 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
985 encode_uleb128 (field->offset, p, &p);
987 emit_byte (w, p - buf);
988 emit_bytes (w, buf, p - buf);
995 emit_uleb128 (w, 0x0);
997 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
998 emit_uleb128 (w, ABBREV_TYPEDEF);
999 emit_string (w, full_name);
1000 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1002 /* Add a pointer type */
1003 emit_label (w, pointer_die);
1005 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1006 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1008 /* Add a reference type */
1009 emit_label (w, reference_die);
1011 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1012 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1016 if (emit_namespace) {
1018 emit_uleb128 (w, 0x0);
1024 static gboolean base_types_emitted [64];
1027 emit_type (MonoDwarfWriter *w, MonoType *t)
1029 MonoClass *klass = mono_class_from_mono_type (t);
1034 if (t->type == MONO_TYPE_VALUETYPE) {
1035 tdie = emit_class_dwarf_info (w, klass, TRUE);
1037 return g_hash_table_lookup (w->class_to_pointer_die, klass);
1040 tdie = emit_class_dwarf_info (w, klass, FALSE);
1041 /* Should return a pointer type to a reference */
1044 t = &mono_defaults.int_class->byval_arg;
1046 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1047 if (basic_types [j].type == t->type)
1049 if (j < G_N_ELEMENTS (basic_types)) {
1050 /* Emit a boxed version of base types */
1051 if (j < 64 && !base_types_emitted [j]) {
1052 emit_class_dwarf_info (w, klass, FALSE);
1053 base_types_emitted [j] = TRUE;
1055 tdie = basic_types [j].die_name;
1058 case MONO_TYPE_CLASS:
1059 emit_class_dwarf_info (w, klass, FALSE);
1060 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1061 //tdie = ".LDIE_OBJECT";
1063 case MONO_TYPE_ARRAY:
1064 tdie = ".LDIE_OBJECT";
1066 case MONO_TYPE_VALUETYPE:
1067 if (klass->enumtype)
1068 tdie = emit_class_dwarf_info (w, klass, FALSE);
1072 case MONO_TYPE_GENERICINST:
1073 if (!MONO_TYPE_ISSTRUCT (t)) {
1074 emit_class_dwarf_info (w, klass, FALSE);
1075 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1093 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1097 tdie = emit_type (w, t);
1099 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1103 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1106 /* FIXME: This needs a location list, since the args can go from reg->stack */
1107 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1108 /* gdb treats this as optimized out */
1109 } else if (ins->opcode == OP_REGVAR) {
1110 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1112 } else if (ins->opcode == OP_REGOFFSET) {
1113 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1114 encode_sleb128 (ins->inst_offset, p, &p);
1124 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1125 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1126 guint8 *expr, guint32 expr_len)
1130 emit_push_section (w, ".debug_loc", 0);
1131 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1132 emit_label (w, label);
1134 emit_pointer_value (w, loclist_begin_addr);
1135 emit_pointer_value (w, loclist_end_addr);
1136 emit_byte (w, expr_len % 256);
1137 emit_byte (w, expr_len / 256);
1138 emit_bytes (w, expr, expr_len);
1140 emit_pointer_value (w, NULL);
1141 emit_pointer_value (w, NULL);
1143 emit_pop_section (w);
1144 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1148 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1149 * it is a public header.
1151 static const guint8 *token_handler_ip;
1154 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1157 MonoMethod *cmethod;
1159 MonoClassField *field;
1160 gpointer data = NULL;
1162 if (method->wrapper_type)
1163 data = mono_method_get_wrapper_data (method, token);
1165 switch (*token_handler_ip) {
1169 if (method->wrapper_type)
1172 klass = mono_class_get_full (method->klass->image, token, NULL);
1173 res = g_strdup_printf ("<%s>", klass->name);
1178 if (method->wrapper_type)
1181 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1182 desc = mono_method_full_name (cmethod, TRUE);
1183 res = g_strdup_printf ("<%s>", desc);
1187 if (method->wrapper_type) {
1188 desc = mono_signature_get_desc (data, FALSE);
1189 res = g_strdup_printf ("<%s>", desc);
1192 res = g_strdup_printf ("<0x%08x>", token);
1199 if (method->wrapper_type)
1202 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1203 desc = mono_field_full_name (field);
1204 res = g_strdup_printf ("<%s>", desc);
1208 res = g_strdup_printf ("<0x%08x>", token);
1218 * Produce a disassembled form of the IL instruction at IP. This is an extension
1219 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1220 * CEE_MONO_ opcodes.
1223 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1227 MonoMethodHeader *header = mono_method_get_header (method);
1229 memset (&dh, 0, sizeof (dh));
1231 dh.label_format = "IL_%04x: ";
1232 dh.label_target = "IL_%04x";
1233 dh.tokener = token_handler;
1235 token_handler_ip = ip;
1236 if (*ip == MONO_CUSTOM_PREFIX) {
1241 case CEE_MONO_ICALL: {
1242 MonoJitICallInfo *info;
1244 token = read32 (ip + 2);
1245 data = mono_method_get_wrapper_data (method, token);
1246 info = mono_find_jit_icall_by_addr (data);
1249 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1253 case CEE_MONO_CLASSCONST: {
1254 token = read32 (ip + 2);
1255 data = mono_method_get_wrapper_data (method, token);
1257 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1262 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1265 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1267 token_handler_ip = NULL;
1270 mono_metadata_free_mh (header);
1275 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1276 guint32 native_offset)
1280 if (!jit->line_numbers)
1283 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1284 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1286 if (lne.native_offset <= native_offset)
1287 return lne.il_offset;
1293 static int max_special_addr_diff = 0;
1296 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1300 /* Use a special opcode if possible */
1301 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1302 if (max_special_addr_diff == 0)
1303 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1305 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1306 emit_byte (w, DW_LNS_const_add_pc);
1307 addr_diff -= max_special_addr_diff;
1310 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1316 emit_byte (w, opcode);
1318 emit_byte (w, DW_LNS_advance_line);
1319 emit_sleb128 (w, line_diff);
1320 emit_byte (w, DW_LNS_advance_pc);
1321 emit_sleb128 (w, addr_diff);
1322 emit_byte (w, DW_LNS_copy);
1327 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1329 if (a->native_offset == b->native_offset)
1330 return a->il_offset - b->il_offset;
1332 return a->native_offset - b->native_offset;
1336 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1337 char *start_symbol, char *end_symbol,
1338 guint8 *code, guint32 code_size,
1339 MonoDebugMethodJitInfo *debug_info)
1341 guint32 prev_line = 0;
1342 guint32 prev_native_offset = 0;
1343 int i, file_index, il_offset, prev_il_offset;
1344 gboolean first = TRUE;
1345 MonoDebugSourceLocation *loc;
1346 char *prev_file_name = NULL;
1347 MonoMethodHeader *header = mono_method_get_header (method);
1348 MonoDebugMethodInfo *minfo;
1349 MonoDebugLineNumberEntry *ln_array;
1350 int *native_to_il_offset = NULL;
1352 if (!w->emit_line) {
1353 mono_metadata_free_mh (header);
1357 minfo = mono_debug_lookup_method (method);
1359 /* Compute the native->IL offset mapping */
1361 g_assert (code_size);
1363 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1364 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1366 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
1368 native_to_il_offset = g_new0 (int, code_size + 1);
1370 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1372 MonoDebugLineNumberEntry *lne = &ln_array [i];
1375 for (j = 0; j < lne->native_offset; ++j)
1376 native_to_il_offset [j] = -1;
1379 if (i < debug_info->num_line_numbers - 1) {
1380 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1382 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1383 native_to_il_offset [j] = lne->il_offset;
1385 for (j = lne->native_offset; j < code_size; ++j)
1386 native_to_il_offset [j] = lne->il_offset;
1392 prev_il_offset = -1;
1394 for (i = 0; i < code_size; ++i) {
1398 if (!debug_info->line_numbers)
1401 if (native_to_il_offset)
1402 il_offset = native_to_il_offset [i];
1404 il_offset = il_offset_from_address (method, debug_info, i);
1406 il_offset = il_offset_from_address (method, debug_info, i);
1408 g_assert (il_offset == native_to_il_offset [i]);
1411 il_offset = native_to_il_offset [i];
1415 if (il_offset == prev_il_offset)
1418 prev_il_offset = il_offset;
1420 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1422 // Added the loc->source_file check as otherwise we can
1423 // crash, see the sample in bug 553191 that makes this code
1424 // crash when we call strcmp on loc->source_file below
1425 if (loc && loc->source_file) {
1426 int line_diff = (gint32)loc->row - (gint32)prev_line;
1427 int addr_diff = i - prev_native_offset;
1430 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1433 emit_byte (w, sizeof (gpointer) + 1);
1434 emit_byte (w, DW_LNE_set_address);
1436 emit_pointer_unaligned (w, start_symbol);
1438 emit_pointer_value (w, code);
1441 * The prolog+initlocals region does not have a line number, this
1442 * makes them belong to the first line of the method.
1444 emit_byte (w, DW_LNS_advance_line);
1445 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1446 prev_line = loc->row;
1449 if (loc->row != prev_line) {
1450 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1451 /* Add an entry to the file table */
1452 /* FIXME: Avoid duplicates */
1453 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1454 g_free (prev_file_name);
1455 prev_file_name = g_strdup (loc->source_file);
1457 emit_byte (w, DW_LNS_set_file);
1458 emit_uleb128 (w, file_index);
1459 emit_byte (w, DW_LNS_copy);
1462 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1464 emit_advance_op (w, line_diff, addr_diff);
1466 prev_line = loc->row;
1467 prev_native_offset = i;
1472 mono_debug_symfile_free_location (loc);
1476 g_free (native_to_il_offset);
1477 g_free (prev_file_name);
1480 emit_byte (w, DW_LNS_advance_pc);
1481 emit_sleb128 (w, code_size - prev_native_offset);
1482 emit_byte (w, DW_LNS_copy);
1486 emit_byte (w, DW_LNE_end_sequence);
1487 } else if (!start_symbol) {
1488 /* No debug info, XDEBUG mode */
1490 const guint8 *ip = header->code;
1491 int prev_line, prev_native_offset;
1495 * Emit the IL code into a temporary file and emit line number info
1496 * referencing that file.
1499 name = mono_method_full_name (method, TRUE);
1500 fprintf (w->il_file, "// %s\n", name);
1501 w->il_file_line_index ++;
1504 il_to_line = g_new0 (int, header->code_size);
1506 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1508 emit_byte (w, sizeof (gpointer) + 1);
1509 emit_byte (w, DW_LNE_set_address);
1510 emit_pointer_value (w, code);
1512 // FIXME: Optimize this
1513 while (ip < header->code + header->code_size) {
1514 int il_offset = ip - header->code;
1517 w->il_file_line_index ++;
1519 dis = disasm_ins (method, ip, &ip);
1520 fprintf (w->il_file, "%s\n", dis);
1523 il_to_line [il_offset] = w->il_file_line_index;
1526 /* Emit line number info */
1528 prev_native_offset = 0;
1529 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1530 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1533 if (lne->il_offset >= header->code_size)
1535 line = il_to_line [lne->il_offset];
1538 * This seems to happen randomly, it looks like il_offset points
1539 * into the middle of an instruction.
1543 printf ("%s\n", mono_method_full_name (method, TRUE));
1544 printf ("%d %d\n", lne->il_offset, header->code_size);
1549 if (line - prev_line != 0) {
1550 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1553 prev_native_offset = lne->native_offset;
1557 emit_byte (w, DW_LNS_advance_pc);
1558 emit_sleb128 (w, code_size - prev_native_offset);
1559 emit_byte (w, DW_LNS_copy);
1563 emit_byte (w, DW_LNE_end_sequence);
1565 fflush (w->il_file);
1566 g_free (il_to_line);
1568 mono_metadata_free_mh (header);
1571 static MonoMethodVar*
1572 find_vmv (MonoCompile *cfg, MonoInst *ins)
1577 for (j = 0; j < cfg->num_varinfo; ++j) {
1578 if (cfg->varinfo [j] == ins)
1582 if (j < cfg->num_varinfo) {
1583 return MONO_VARINFO (cfg, j);
1591 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)
1594 MonoMethodSignature *sig;
1595 MonoMethodHeader *header;
1597 MonoDebugLocalsInfo *locals_info;
1602 emit_section_change (w, ".debug_info", 0);
1604 sig = mono_method_signature (method);
1605 header = mono_method_get_header (method);
1607 /* Parameter types */
1608 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1611 if (i == 0 && sig->hasthis) {
1612 if (method->klass->valuetype)
1613 t = &method->klass->this_arg;
1615 t = &method->klass->byval_arg;
1617 t = sig->params [i - sig->hasthis];
1624 for (i = 0; i < header->num_locals; ++i) {
1625 emit_type (w, header->locals [i]);
1629 names = g_new0 (char *, sig->param_count);
1630 mono_method_get_param_names (method, (const char **) names);
1632 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1633 name = mono_method_full_name (method, FALSE);
1634 emit_string (w, name);
1637 emit_pointer_unaligned (w, start_symbol);
1638 emit_pointer_unaligned (w, end_symbol);
1640 emit_pointer_value (w, code);
1641 emit_pointer_value (w, code + code_size);
1645 emit_byte (w, DW_OP_breg6);
1649 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1650 MonoInst *arg = args ? args [i] : NULL;
1653 char pname_buf [128];
1654 MonoMethodVar *vmv = NULL;
1655 gboolean need_loclist = FALSE;
1657 vmv = find_vmv (cfg, arg);
1658 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1659 need_loclist = TRUE;
1661 if (i == 0 && sig->hasthis) {
1662 if (method->klass->valuetype)
1663 t = &method->klass->this_arg;
1665 t = &method->klass->byval_arg;
1668 t = sig->params [i - sig->hasthis];
1669 pname = names [i - sig->hasthis];
1672 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1674 if (pname[0] == '\0') {
1675 sprintf (pname_buf, "param%d", i - sig->hasthis);
1678 emit_string (w, pname);
1680 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1681 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1683 emit_var_type (w, t);
1686 encode_var_location (w, arg, p, &p);
1688 vmv->live_range_start = 0;
1689 if (vmv->live_range_end == 0)
1690 /* FIXME: Uses made in calls are not recorded */
1691 vmv->live_range_end = code_size;
1692 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1694 emit_byte (w, p - buf);
1695 emit_bytes (w, buf, p - buf);
1701 locals_info = mono_debug_lookup_locals (method);
1703 for (i = 0; i < header->num_locals; ++i) {
1704 MonoInst *ins = locals [i];
1705 char name_buf [128];
1707 MonoMethodVar *vmv = NULL;
1708 gboolean need_loclist = FALSE;
1711 /* ins->dreg no longer contains the original vreg */
1712 vmv = find_vmv (cfg, ins);
1714 if (vmv->live_range_start) {
1715 /* This variable has a precise live range */
1716 need_loclist = TRUE;
1720 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1724 for (j = 0; j < locals_info->num_locals; ++j)
1725 if (locals_info->locals [j].index == i)
1727 if (j < locals_info->num_locals)
1728 lname = locals_info->locals [j].name;
1731 emit_string (w, lname);
1733 sprintf (name_buf, "V_%d", i);
1734 emit_string (w, name_buf);
1737 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1738 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1740 emit_var_type (w, header->locals [i]);
1743 encode_var_location (w, ins, p, &p);
1746 if (vmv->live_range_end == 0)
1747 /* FIXME: Uses made in calls are not recorded */
1748 vmv->live_range_end = code_size;
1749 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1751 emit_byte (w, p - buf);
1752 emit_bytes (w, buf, p - buf);
1757 mono_debug_symfile_free_locals (locals_info);
1759 /* Subprogram end */
1760 emit_uleb128 (w, 0x0);
1764 emit_debug_info_end (w);
1766 /* Emit unwind info */
1768 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1772 /* Emit line number info */
1773 /* != could happen when using --regression */
1774 if (debug_info && (debug_info->code_start == code))
1775 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
1778 mono_metadata_free_mh (header);
1782 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)
1784 emit_section_change (w, ".debug_info", 0);
1787 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1788 emit_string (w, tramp_name);
1789 emit_pointer_value (w, code);
1790 emit_pointer_value (w, code + code_size);
1793 emit_byte (w, DW_OP_breg6);
1796 /* Subprogram end */
1797 emit_uleb128 (w, 0x0);
1799 emit_debug_info_end (w);
1801 /* Emit unwind info */
1802 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
1805 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */