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)
379 /* Convert the list of MonoUnwindOps to the format used by DWARF */
380 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
381 emit_bytes (w, uw_info, uw_info_len);
384 emit_alignment (w, sizeof (mgreg_t));
385 emit_label (w, symbol2);
389 #define ABBREV_COMPILE_UNIT 1
390 #define ABBREV_SUBPROGRAM 2
391 #define ABBREV_PARAM 3
392 #define ABBREV_BASE_TYPE 4
393 #define ABBREV_STRUCT_TYPE 5
394 #define ABBREV_DATA_MEMBER 6
395 #define ABBREV_TYPEDEF 7
396 #define ABBREV_ENUM_TYPE 8
397 #define ABBREV_ENUMERATOR 9
398 #define ABBREV_NAMESPACE 10
399 #define ABBREV_VARIABLE 11
400 #define ABBREV_VARIABLE_LOCLIST 12
401 #define ABBREV_POINTER_TYPE 13
402 #define ABBREV_REFERENCE_TYPE 14
403 #define ABBREV_PARAM_LOCLIST 15
404 #define ABBREV_INHERITANCE 16
405 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
407 static int compile_unit_attr [] = {
408 DW_AT_producer ,DW_FORM_string,
409 DW_AT_name ,DW_FORM_string,
410 DW_AT_comp_dir ,DW_FORM_string,
411 DW_AT_language ,DW_FORM_data1,
412 DW_AT_low_pc ,DW_FORM_addr,
413 DW_AT_high_pc ,DW_FORM_addr,
414 DW_AT_stmt_list ,DW_FORM_data4
417 static int subprogram_attr [] = {
418 DW_AT_name , DW_FORM_string,
419 DW_AT_low_pc , DW_FORM_addr,
420 DW_AT_high_pc , DW_FORM_addr,
421 DW_AT_frame_base , DW_FORM_block1
424 static int param_attr [] = {
425 DW_AT_name, DW_FORM_string,
426 DW_AT_type, DW_FORM_ref4,
427 DW_AT_location, DW_FORM_block1
430 static int param_loclist_attr [] = {
431 DW_AT_name, DW_FORM_string,
432 DW_AT_type, DW_FORM_ref4,
433 DW_AT_location, DW_FORM_data4
436 static int base_type_attr [] = {
437 DW_AT_byte_size, DW_FORM_data1,
438 DW_AT_encoding, DW_FORM_data1,
439 DW_AT_name, DW_FORM_string
442 static int struct_type_attr [] = {
443 DW_AT_name, DW_FORM_string,
444 DW_AT_byte_size, DW_FORM_udata,
447 static int data_member_attr [] = {
448 DW_AT_name, DW_FORM_string,
449 DW_AT_type, DW_FORM_ref4,
450 DW_AT_data_member_location, DW_FORM_block1
453 static int typedef_attr [] = {
454 DW_AT_name, DW_FORM_string,
455 DW_AT_type, DW_FORM_ref4
458 static int pointer_type_attr [] = {
459 DW_AT_type, DW_FORM_ref4,
462 static int reference_type_attr [] = {
463 DW_AT_type, DW_FORM_ref4,
466 static int enum_type_attr [] = {
467 DW_AT_name, DW_FORM_string,
468 DW_AT_byte_size, DW_FORM_udata,
469 DW_AT_type, DW_FORM_ref4,
472 static int enumerator_attr [] = {
473 DW_AT_name, DW_FORM_string,
474 DW_AT_const_value, DW_FORM_sdata,
477 static int namespace_attr [] = {
478 DW_AT_name, DW_FORM_string,
481 static int variable_attr [] = {
482 DW_AT_name, DW_FORM_string,
483 DW_AT_type, DW_FORM_ref4,
484 DW_AT_location, DW_FORM_block1
487 static int variable_loclist_attr [] = {
488 DW_AT_name, DW_FORM_string,
489 DW_AT_type, DW_FORM_ref4,
490 DW_AT_location, DW_FORM_data4
493 static int inheritance_attr [] = {
494 DW_AT_type, DW_FORM_ref4,
495 DW_AT_data_member_location, DW_FORM_block1
498 typedef struct DwarfBasicType {
499 const char *die_name, *name;
505 static DwarfBasicType basic_types [] = {
506 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
507 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
508 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
509 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
510 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
511 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
512 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
513 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
514 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
515 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
516 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
517 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
518 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
519 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
520 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
521 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
522 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
525 /* Constants for encoding line number special opcodes */
526 #define OPCODE_BASE 13
528 #define LINE_RANGE 14
530 /* Subsections of the .debug_line section */
531 #define LINE_SUBSECTION_HEADER 1
532 #define LINE_SUBSECTION_INCLUDES 2
533 #define LINE_SUBSECTION_FILES 3
534 #define LINE_SUBSECTION_DATA 4
535 #define LINE_SUBSECTION_END 5
538 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
539 gint64 last_mod_time, gint64 file_size)
543 char *basename = NULL;
545 if (!w->file_to_index)
546 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
548 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
552 if (g_path_is_absolute (name)) {
553 char *dir = g_path_get_dirname (name);
555 if (!w->dir_to_index)
556 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
558 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
559 if (dir_index == 0) {
560 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
561 emit_string (w, dir);
563 dir_index = ++ w->line_number_dir_index;
564 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
569 basename = g_path_get_basename (name);
574 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
577 emit_string (w, basename);
579 emit_string (w, name);
580 emit_uleb128 (w, dir_index);
584 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
589 index = ++ w->line_number_file_index;
590 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
596 emit_line_number_info_begin (MonoDwarfWriter *w)
598 /* Line number info header */
600 * GAS seems to emit its own data to the end of the first subsection, so we use
601 * subsections 1, 2 etc:
602 * 1 - contains the header
603 * 2 - contains the file names
604 * 3 - contains the end of the header + the data
607 emit_section_change (w, ".debug_line", 0);
608 emit_label (w, ".Ldebug_line_section_start");
609 emit_section_change (w, ".debug_line", LINE_SUBSECTION_HEADER);
610 emit_label (w, ".Ldebug_line_start");
611 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
612 emit_int16 (w, 0x2); /* version */
613 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
614 emit_byte (w, 1); /* minimum_instruction_length */
615 emit_byte (w, 1); /* default_is_stmt */
616 emit_byte (w, LINE_BASE); /* line_base */
617 emit_byte (w, LINE_RANGE); /* line_range */
618 emit_byte (w, OPCODE_BASE); /* opcode_base */
619 emit_byte (w, 0); /* standard_opcode_lengths */
633 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
635 /* End of Includes */
636 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
640 emit_line_number_file_name (w, "xdb.il", 0, 0);
643 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
646 emit_label (w, ".Ldebug_line_header_end");
648 /* Emit this into a separate subsection so it gets placed at the end */
649 emit_section_change (w, ".debug_line", LINE_SUBSECTION_END);
653 emit_byte (w, DW_LNE_end_sequence);
655 emit_label (w, ".Ldebug_line_end");
659 * Some assemblers like apple's do not support subsections, so we can't place
660 * .Ldebug_info_end at the end of the section using subsections. Instead, we
661 * define it every time something gets added to the .debug_info section.
662 * The apple assember seems to use the last definition.
665 emit_debug_info_end (MonoDwarfWriter *w)
667 /* This doesn't seem to work/required with recent iphone sdk versions */
669 if (!img_writer_subsections_supported (w->w))
670 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
675 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, GSList *base_unwind_program)
677 char *s, *build_info;
680 if (!img_writer_subsections_supported (w->w))
681 /* Can't emit line number info without subsections */
682 w->emit_line = FALSE;
686 w->cie_program = base_unwind_program;
688 emit_section_change (w, ".debug_abbrev", 0);
689 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
690 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
691 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
692 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
693 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
694 param_attr, G_N_ELEMENTS (param_attr));
695 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
696 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
697 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
698 base_type_attr, G_N_ELEMENTS (base_type_attr));
699 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
700 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
701 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
702 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
703 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
704 data_member_attr, G_N_ELEMENTS (data_member_attr));
705 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
706 typedef_attr, G_N_ELEMENTS (typedef_attr));
707 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
708 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
709 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
710 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
711 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
712 namespace_attr, G_N_ELEMENTS (namespace_attr));
713 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
714 variable_attr, G_N_ELEMENTS (variable_attr));
715 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
716 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
717 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
718 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
719 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
720 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
721 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
722 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
725 emit_section_change (w, ".debug_info", 0);
726 emit_label (w, ".Ldebug_info_start");
727 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
728 emit_label (w, ".Ldebug_info_begin");
729 emit_int16 (w, 0x2); /* DWARF version 2 */
730 emit_int32 (w, 0); /* .debug_abbrev offset */
731 emit_byte (w, sizeof (gpointer)); /* address size */
733 if (img_writer_subsections_supported (w->w) && w->appending) {
734 /* Emit this into a separate section so it gets placed at the end */
735 emit_section_change (w, ".debug_info", 1);
736 emit_byte (w, 0); /* close COMPILE_UNIT */
737 emit_label (w, ".Ldebug_info_end");
738 emit_section_change (w, ".debug_info", 0);
741 /* Compilation unit */
742 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
743 build_info = mono_get_runtime_build_info ();
744 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
748 emit_string (w, "JITted code");
750 emit_byte (w, DW_LANG_C);
751 emit_pointer_value (w, 0);
752 emit_pointer_value (w, 0);
753 /* offset into .debug_line section */
754 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
757 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
758 emit_label (w, basic_types [i].die_name);
759 emit_uleb128 (w, ABBREV_BASE_TYPE);
760 emit_byte (w, basic_types [i].size);
761 emit_byte (w, basic_types [i].encoding);
762 emit_string (w, basic_types [i].name);
765 emit_debug_info_end (w);
767 /* debug_loc section */
768 emit_section_change (w, ".debug_loc", 0);
769 emit_label (w, ".Ldebug_loc_start");
771 /* debug_line section */
773 * We emit some info even if emit_line is FALSE, as the
774 * apple linker seems to require a .debug_line section.
776 emit_line_number_info_begin (w);
782 * mono_dwarf_writer_close:
784 * Finalize the emitted debugging info.
787 mono_dwarf_writer_close (MonoDwarfWriter *w)
790 emit_section_change (w, ".debug_info", 0);
791 emit_byte (w, 0); /* close COMPILE_UNIT */
792 emit_label (w, ".Ldebug_info_end");
796 static const char* emit_type (MonoDwarfWriter *w, MonoType *t);
798 /* Returns the local symbol pointing to the emitted debug info */
800 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
802 char *die, *pointer_die, *reference_die;
805 MonoClassField *field;
808 gboolean emit_namespace = FALSE, has_children;
812 if (!w->class_to_die)
813 w->class_to_die = g_hash_table_new (NULL, NULL);
814 if (!w->class_to_vtype_die)
815 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
816 if (!w->class_to_pointer_die)
817 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
818 if (!w->class_to_reference_die)
819 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
822 cache = w->class_to_vtype_die;
824 cache = w->class_to_die;
826 die = g_hash_table_lookup (cache, klass);
830 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)))
834 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
837 if (klass->name_space && klass->name_space [0] != '\0')
838 emit_namespace = TRUE;
840 if (emit_namespace) {
841 emit_uleb128 (w, ABBREV_NAMESPACE);
842 emit_string (w, klass->name_space);
845 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
847 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
848 * to separate components.
850 for (p = full_name; *p; p ++)
854 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
855 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
856 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
859 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
860 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
861 g_hash_table_insert (cache, klass, die);
863 if (klass->enumtype) {
864 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
868 emit_uleb128 (w, ABBREV_ENUM_TYPE);
869 emit_string (w, full_name);
870 emit_uleb128 (w, size);
871 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
872 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
874 g_assert (k < G_N_ELEMENTS (basic_types));
875 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
877 /* Emit enum values */
879 while ((field = mono_class_get_fields (klass, &iter))) {
882 MonoTypeEnum def_type;
884 if (strcmp ("value__", mono_field_get_name (field)) == 0)
886 if (mono_field_is_deleted (field))
889 emit_uleb128 (w, ABBREV_ENUMERATOR);
890 emit_string (w, mono_field_get_name (field));
892 p = mono_class_get_field_default_value (field, &def_type);
893 len = mono_metadata_decode_blob_size (p, &p);
894 switch (mono_class_enum_basetype (klass)->type) {
897 case MONO_TYPE_BOOLEAN:
898 emit_sleb128 (w, *p);
903 emit_sleb128 (w, read16 (p));
907 emit_sleb128 (w, read32 (p));
911 emit_sleb128 (w, read64 (p));
915 #if SIZEOF_VOID_P == 8
916 emit_sleb128 (w, read64 (p));
918 emit_sleb128 (w, read32 (p));
922 g_assert_not_reached ();
933 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
937 /* Emit field types */
939 while ((field = mono_class_get_fields (klass, &iter))) {
940 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
943 emit_type (w, field->type);
947 has_children = parent_die || mono_class_get_fields (klass, &iter);
951 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
952 emit_string (w, full_name);
953 emit_uleb128 (w, klass->instance_size);
956 emit_uleb128 (w, ABBREV_INHERITANCE);
957 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
960 *p ++= DW_OP_plus_uconst;
961 encode_uleb128 (0, p, &p);
962 emit_byte (w, p - buf);
963 emit_bytes (w, buf, p - buf);
968 while ((field = mono_class_get_fields (klass, &iter))) {
969 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
972 fdie = emit_type (w, field->type);
974 emit_uleb128 (w, ABBREV_DATA_MEMBER);
975 emit_string (w, field->name);
976 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
979 *p ++= DW_OP_plus_uconst;
980 if (klass->valuetype && vtype)
981 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
983 encode_uleb128 (field->offset, p, &p);
985 emit_byte (w, p - buf);
986 emit_bytes (w, buf, p - buf);
993 emit_uleb128 (w, 0x0);
995 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
996 emit_uleb128 (w, ABBREV_TYPEDEF);
997 emit_string (w, full_name);
998 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1000 /* Add a pointer type */
1001 emit_label (w, pointer_die);
1003 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1004 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1006 /* Add a reference type */
1007 emit_label (w, reference_die);
1009 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1010 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1014 if (emit_namespace) {
1016 emit_uleb128 (w, 0x0);
1023 emit_type (MonoDwarfWriter *w, MonoType *t)
1025 MonoClass *klass = mono_class_from_mono_type (t);
1030 if (t->type == MONO_TYPE_VALUETYPE) {
1031 tdie = emit_class_dwarf_info (w, klass, TRUE);
1033 return g_hash_table_lookup (w->class_to_pointer_die, klass);
1036 tdie = emit_class_dwarf_info (w, klass, FALSE);
1037 /* Should return a pointer type to a reference */
1040 t = &mono_defaults.int_class->byval_arg;
1042 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1043 if (basic_types [j].type == t->type)
1045 if (j < G_N_ELEMENTS (basic_types))
1046 tdie = basic_types [j].die_name;
1049 case MONO_TYPE_CLASS:
1050 emit_class_dwarf_info (w, klass, FALSE);
1051 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1052 //tdie = ".LDIE_OBJECT";
1054 case MONO_TYPE_ARRAY:
1055 tdie = ".LDIE_OBJECT";
1057 case MONO_TYPE_VALUETYPE:
1058 if (klass->enumtype)
1059 tdie = emit_class_dwarf_info (w, klass, FALSE);
1063 case MONO_TYPE_GENERICINST:
1064 if (!MONO_TYPE_ISSTRUCT (t)) {
1065 emit_class_dwarf_info (w, klass, FALSE);
1066 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1081 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1085 tdie = emit_type (w, t);
1087 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1091 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1094 /* FIXME: This needs a location list, since the args can go from reg->stack */
1095 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1096 /* gdb treats this as optimized out */
1097 } else if (ins->opcode == OP_REGVAR) {
1098 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1100 } else if (ins->opcode == OP_REGOFFSET) {
1101 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1102 encode_sleb128 (ins->inst_offset, p, &p);
1112 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1113 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1114 guint8 *expr, guint32 expr_len)
1118 emit_push_section (w, ".debug_loc", 0);
1119 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1120 emit_label (w, label);
1122 emit_pointer_value (w, loclist_begin_addr);
1123 emit_pointer_value (w, loclist_end_addr);
1124 emit_byte (w, expr_len % 256);
1125 emit_byte (w, expr_len / 256);
1126 emit_bytes (w, expr, expr_len);
1128 emit_pointer_value (w, NULL);
1129 emit_pointer_value (w, NULL);
1131 emit_pop_section (w);
1132 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1136 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1137 * it is a public header.
1139 static const guint8 *token_handler_ip;
1142 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1145 MonoMethod *cmethod;
1147 MonoClassField *field;
1148 gpointer data = NULL;
1150 if (method->wrapper_type)
1151 data = mono_method_get_wrapper_data (method, token);
1153 switch (*token_handler_ip) {
1157 if (method->wrapper_type)
1160 klass = mono_class_get_full (method->klass->image, token, NULL);
1161 res = g_strdup_printf ("<%s>", klass->name);
1166 if (method->wrapper_type)
1169 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1170 desc = mono_method_full_name (cmethod, TRUE);
1171 res = g_strdup_printf ("<%s>", desc);
1175 if (method->wrapper_type) {
1176 desc = mono_signature_get_desc (data, FALSE);
1177 res = g_strdup_printf ("<%s>", desc);
1180 res = g_strdup_printf ("<0x%08x>", token);
1187 if (method->wrapper_type)
1190 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1191 desc = mono_field_full_name (field);
1192 res = g_strdup_printf ("<%s>", desc);
1196 res = g_strdup_printf ("<0x%08x>", token);
1206 * Produce a disassembled form of the IL instruction at IP. This is an extension
1207 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1208 * CEE_MONO_ opcodes.
1211 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1215 MonoMethodHeader *header = mono_method_get_header (method);
1217 memset (&dh, 0, sizeof (dh));
1219 dh.label_format = "IL_%04x: ";
1220 dh.label_target = "IL_%04x";
1221 dh.tokener = token_handler;
1223 token_handler_ip = ip;
1224 if (*ip == MONO_CUSTOM_PREFIX) {
1229 case CEE_MONO_ICALL: {
1230 MonoJitICallInfo *info;
1232 token = read32 (ip + 2);
1233 data = mono_method_get_wrapper_data (method, token);
1234 info = mono_find_jit_icall_by_addr (data);
1237 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1241 case CEE_MONO_CLASSCONST: {
1242 token = read32 (ip + 2);
1243 data = mono_method_get_wrapper_data (method, token);
1245 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1250 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1253 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1255 token_handler_ip = NULL;
1262 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1263 guint32 native_offset)
1267 if (!jit->line_numbers)
1270 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1271 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1273 if (lne.native_offset <= native_offset)
1274 return lne.il_offset;
1280 static int max_special_addr_diff = 0;
1283 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1287 /* Use a special opcode if possible */
1288 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1289 if (max_special_addr_diff == 0)
1290 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1292 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1293 emit_byte (w, DW_LNS_const_add_pc);
1294 addr_diff -= max_special_addr_diff;
1297 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1303 emit_byte (w, opcode);
1305 emit_byte (w, DW_LNS_advance_line);
1306 emit_sleb128 (w, line_diff);
1307 emit_byte (w, DW_LNS_advance_pc);
1308 emit_sleb128 (w, addr_diff);
1309 emit_byte (w, DW_LNS_copy);
1314 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1316 if (a->native_offset == b->native_offset)
1317 return a->il_offset - b->il_offset;
1319 return a->native_offset - b->native_offset;
1323 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1324 char *start_symbol, char *end_symbol,
1325 guint8 *code, guint32 code_size,
1326 MonoDebugMethodJitInfo *debug_info)
1328 guint32 prev_line = 0;
1329 guint32 prev_native_offset = 0;
1330 int i, file_index, il_offset, prev_il_offset;
1331 gboolean first = TRUE;
1332 MonoDebugSourceLocation *loc;
1333 char *prev_file_name = NULL;
1334 MonoMethodHeader *header = mono_method_get_header (method);
1335 MonoDebugMethodInfo *minfo;
1337 int *native_to_il_offset = NULL;
1342 minfo = mono_debug_lookup_method (method);
1344 /* Compute the native->IL offset mapping */
1346 g_assert (code_size);
1349 /* g_array is not implemented in eglib */
1352 ln_array = g_array_sized_new (FALSE, FALSE, sizeof (MonoDebugLineNumberEntry),
1353 debug_info->num_line_numbers);
1354 g_array_append_vals (ln_array, debug_info->line_numbers, debug_info->num_line_numbers);
1355 g_array_sort (ln_array, (GCompareFunc)compare_lne);
1356 native_to_il_offset = g_new0 (int, code_size + 1);
1358 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1360 MonoDebugLineNumberEntry lne = g_array_index (ln_array, MonoDebugLineNumberEntry, i);
1363 for (j = 0; j < lne.native_offset; ++j)
1364 native_to_il_offset [j] = -1;
1367 if (i < debug_info->num_line_numbers - 1) {
1368 MonoDebugLineNumberEntry lne_next = g_array_index (ln_array, MonoDebugLineNumberEntry, i + 1);
1370 for (j = lne.native_offset; j < lne_next.native_offset; ++j)
1371 native_to_il_offset [j] = lne.il_offset;
1373 for (j = lne.native_offset; j < code_size; ++j)
1374 native_to_il_offset [j] = lne.il_offset;
1377 g_array_free (ln_array, TRUE);
1381 prev_il_offset = -1;
1383 for (i = 0; i < code_size; ++i) {
1387 if (!debug_info->line_numbers)
1390 if (native_to_il_offset)
1391 il_offset = native_to_il_offset [i];
1393 il_offset = il_offset_from_address (method, debug_info, i);
1395 il_offset = il_offset_from_address (method, debug_info, i);
1397 g_assert (il_offset == native_to_il_offset [i]);
1400 il_offset = native_to_il_offset [i];
1404 if (il_offset == prev_il_offset)
1407 prev_il_offset = il_offset;
1409 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1411 // Added the loc->source_file check as otherwise we can
1412 // crash, see the sample in bug 553191 that makes this code
1413 // crash when we call strcmp on loc->source_file below
1414 if (loc && loc->source_file) {
1415 int line_diff = (gint32)loc->row - (gint32)prev_line;
1416 int addr_diff = i - prev_native_offset;
1419 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1422 emit_byte (w, sizeof (gpointer) + 1);
1423 emit_byte (w, DW_LNE_set_address);
1425 emit_pointer_unaligned (w, start_symbol);
1427 emit_pointer_value (w, code);
1430 * The prolog+initlocals region does not have a line number, this
1431 * makes them belong to the first line of the method.
1433 emit_byte (w, DW_LNS_advance_line);
1434 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1435 prev_line = loc->row;
1438 if (loc->row != prev_line) {
1439 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1440 /* Add an entry to the file table */
1441 /* FIXME: Avoid duplicates */
1442 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1443 g_free (prev_file_name);
1444 prev_file_name = g_strdup (loc->source_file);
1446 emit_byte (w, DW_LNS_set_file);
1447 emit_uleb128 (w, file_index);
1448 emit_byte (w, DW_LNS_copy);
1451 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1453 emit_advance_op (w, line_diff, addr_diff);
1455 prev_line = loc->row;
1456 prev_native_offset = i;
1464 g_free (prev_file_name);
1467 emit_byte (w, DW_LNS_advance_pc);
1468 emit_sleb128 (w, code_size - prev_native_offset);
1469 emit_byte (w, DW_LNS_copy);
1473 emit_byte (w, DW_LNE_end_sequence);
1474 } else if (!start_symbol) {
1475 /* No debug info, XDEBUG mode */
1477 const guint8 *ip = header->code;
1478 int prev_line, prev_native_offset;
1482 * Emit the IL code into a temporary file and emit line number info
1483 * referencing that file.
1486 name = mono_method_full_name (method, TRUE);
1487 fprintf (w->il_file, "// %s\n", name);
1488 w->il_file_line_index ++;
1491 il_to_line = g_new0 (int, header->code_size);
1493 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1495 emit_byte (w, sizeof (gpointer) + 1);
1496 emit_byte (w, DW_LNE_set_address);
1497 emit_pointer_value (w, code);
1499 // FIXME: Optimize this
1500 while (ip < header->code + header->code_size) {
1501 int il_offset = ip - header->code;
1504 w->il_file_line_index ++;
1506 dis = disasm_ins (method, ip, &ip);
1507 fprintf (w->il_file, "%s\n", dis);
1510 il_to_line [il_offset] = w->il_file_line_index;
1513 /* Emit line number info */
1515 prev_native_offset = 0;
1516 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1517 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1520 if (lne->il_offset >= header->code_size)
1522 line = il_to_line [lne->il_offset];
1525 * This seems to happen randomly, it looks like il_offset points
1526 * into the middle of an instruction.
1530 printf ("%s\n", mono_method_full_name (method, TRUE));
1531 printf ("%d %d\n", lne->il_offset, header->code_size);
1536 if (line - prev_line != 0) {
1537 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1540 prev_native_offset = lne->native_offset;
1544 emit_byte (w, DW_LNS_advance_pc);
1545 emit_sleb128 (w, code_size - prev_native_offset);
1546 emit_byte (w, DW_LNS_copy);
1550 emit_byte (w, DW_LNE_end_sequence);
1552 fflush (w->il_file);
1553 g_free (il_to_line);
1557 static MonoMethodVar*
1558 find_vmv (MonoCompile *cfg, MonoInst *ins)
1563 for (j = 0; j < cfg->num_varinfo; ++j) {
1564 if (cfg->varinfo [j] == ins)
1568 if (j < cfg->num_varinfo) {
1569 return MONO_VARINFO (cfg, j);
1577 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)
1580 MonoMethodSignature *sig;
1581 MonoMethodHeader *header;
1582 char **names, **tdies, **local_tdies;
1589 emit_section_change (w, ".debug_info", 0);
1591 sig = mono_method_signature (method);
1592 header = mono_method_get_header (method);
1594 /* Parameter types */
1595 tdies = g_new0 (char *, sig->param_count + sig->hasthis);
1596 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1599 if (i == 0 && sig->hasthis) {
1600 if (method->klass->valuetype)
1601 t = &method->klass->this_arg;
1603 t = &method->klass->byval_arg;
1605 t = sig->params [i - sig->hasthis];
1612 local_tdies = g_new0 (char *, header->num_locals);
1613 for (i = 0; i < header->num_locals; ++i) {
1614 emit_type (w, header->locals [i]);
1618 names = g_new0 (char *, sig->param_count);
1619 mono_method_get_param_names (method, (const char **) names);
1621 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1622 name = mono_method_full_name (method, FALSE);
1623 emit_string (w, name);
1626 emit_pointer_unaligned (w, start_symbol);
1627 emit_pointer_unaligned (w, end_symbol);
1629 emit_pointer_value (w, code);
1630 emit_pointer_value (w, code + code_size);
1634 emit_byte (w, DW_OP_breg6);
1638 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1639 MonoInst *arg = args ? args [i] : NULL;
1642 char pname_buf [128];
1643 MonoMethodVar *vmv = NULL;
1644 gboolean need_loclist = FALSE;
1646 vmv = find_vmv (cfg, arg);
1647 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1648 need_loclist = TRUE;
1650 if (i == 0 && sig->hasthis) {
1651 if (method->klass->valuetype)
1652 t = &method->klass->this_arg;
1654 t = &method->klass->byval_arg;
1657 t = sig->params [i - sig->hasthis];
1658 pname = names [i - sig->hasthis];
1661 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1663 if (pname[0] == '\0') {
1664 sprintf (pname_buf, "param%d", i - sig->hasthis);
1667 emit_string (w, pname);
1669 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1670 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1672 emit_var_type (w, t);
1675 encode_var_location (w, arg, p, &p);
1677 vmv->live_range_start = 0;
1678 if (vmv->live_range_end == 0)
1679 /* FIXME: Uses made in calls are not recorded */
1680 vmv->live_range_end = code_size;
1681 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1683 emit_byte (w, p - buf);
1684 emit_bytes (w, buf, p - buf);
1690 num_locals = mono_debug_lookup_locals (method, &local_names, &local_indexes);
1692 for (i = 0; i < header->num_locals; ++i) {
1693 MonoInst *ins = locals [i];
1694 char name_buf [128];
1696 MonoMethodVar *vmv = NULL;
1697 gboolean need_loclist = FALSE;
1699 /* ins->dreg no longer contains the original vreg */
1700 vmv = find_vmv (cfg, ins);
1702 if (vmv->live_range_start) {
1703 /* This variable has a precise live range */
1704 need_loclist = TRUE;
1708 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1710 for (j = 0; j < num_locals; ++j)
1711 if (local_indexes [j] == i)
1713 if (j < num_locals) {
1714 emit_string (w, local_names [j]);
1716 sprintf (name_buf, "V_%d", i);
1717 emit_string (w, name_buf);
1720 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1721 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1723 emit_var_type (w, header->locals [i]);
1726 encode_var_location (w, ins, p, &p);
1729 if (vmv->live_range_end == 0)
1730 /* FIXME: Uses made in calls are not recorded */
1731 vmv->live_range_end = code_size;
1732 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1734 emit_byte (w, p - buf);
1735 emit_bytes (w, buf, p - buf);
1739 g_free (local_names);
1740 g_free (local_indexes);
1742 /* Subprogram end */
1743 emit_uleb128 (w, 0x0);
1747 emit_debug_info_end (w);
1749 /* Emit unwind info */
1751 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1755 /* Emit line number info */
1756 /* != could happen when using --regression */
1757 if (debug_info && (debug_info->code_start == code))
1758 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
1764 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)
1766 emit_section_change (w, ".debug_info", 0);
1769 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1770 emit_string (w, tramp_name);
1771 emit_pointer_value (w, code);
1772 emit_pointer_value (w, code + code_size);
1775 emit_byte (w, DW_OP_breg6);
1778 /* Subprogram end */
1779 emit_uleb128 (w, 0x0);
1781 emit_debug_info_end (w);
1783 /* Emit unwind info */
1784 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
1787 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */