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);
1084 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1088 tdie = emit_type (w, t);
1090 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1094 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1097 /* FIXME: This needs a location list, since the args can go from reg->stack */
1098 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1099 /* gdb treats this as optimized out */
1100 } else if (ins->opcode == OP_REGVAR) {
1101 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1103 } else if (ins->opcode == OP_REGOFFSET) {
1104 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1105 encode_sleb128 (ins->inst_offset, p, &p);
1115 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1116 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1117 guint8 *expr, guint32 expr_len)
1121 emit_push_section (w, ".debug_loc", 0);
1122 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1123 emit_label (w, label);
1125 emit_pointer_value (w, loclist_begin_addr);
1126 emit_pointer_value (w, loclist_end_addr);
1127 emit_byte (w, expr_len % 256);
1128 emit_byte (w, expr_len / 256);
1129 emit_bytes (w, expr, expr_len);
1131 emit_pointer_value (w, NULL);
1132 emit_pointer_value (w, NULL);
1134 emit_pop_section (w);
1135 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1139 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1140 * it is a public header.
1142 static const guint8 *token_handler_ip;
1145 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1148 MonoMethod *cmethod;
1150 MonoClassField *field;
1151 gpointer data = NULL;
1153 if (method->wrapper_type)
1154 data = mono_method_get_wrapper_data (method, token);
1156 switch (*token_handler_ip) {
1160 if (method->wrapper_type)
1163 klass = mono_class_get_full (method->klass->image, token, NULL);
1164 res = g_strdup_printf ("<%s>", klass->name);
1169 if (method->wrapper_type)
1172 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1173 desc = mono_method_full_name (cmethod, TRUE);
1174 res = g_strdup_printf ("<%s>", desc);
1178 if (method->wrapper_type) {
1179 desc = mono_signature_get_desc (data, FALSE);
1180 res = g_strdup_printf ("<%s>", desc);
1183 res = g_strdup_printf ("<0x%08x>", token);
1190 if (method->wrapper_type)
1193 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1194 desc = mono_field_full_name (field);
1195 res = g_strdup_printf ("<%s>", desc);
1199 res = g_strdup_printf ("<0x%08x>", token);
1209 * Produce a disassembled form of the IL instruction at IP. This is an extension
1210 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1211 * CEE_MONO_ opcodes.
1214 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1218 MonoMethodHeader *header = mono_method_get_header (method);
1220 memset (&dh, 0, sizeof (dh));
1222 dh.label_format = "IL_%04x: ";
1223 dh.label_target = "IL_%04x";
1224 dh.tokener = token_handler;
1226 token_handler_ip = ip;
1227 if (*ip == MONO_CUSTOM_PREFIX) {
1232 case CEE_MONO_ICALL: {
1233 MonoJitICallInfo *info;
1235 token = read32 (ip + 2);
1236 data = mono_method_get_wrapper_data (method, token);
1237 info = mono_find_jit_icall_by_addr (data);
1240 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1244 case CEE_MONO_CLASSCONST: {
1245 token = read32 (ip + 2);
1246 data = mono_method_get_wrapper_data (method, token);
1248 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1253 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1256 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1258 token_handler_ip = NULL;
1265 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1266 guint32 native_offset)
1270 if (!jit->line_numbers)
1273 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1274 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1276 if (lne.native_offset <= native_offset)
1277 return lne.il_offset;
1283 static int max_special_addr_diff = 0;
1286 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1290 /* Use a special opcode if possible */
1291 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1292 if (max_special_addr_diff == 0)
1293 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1295 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1296 emit_byte (w, DW_LNS_const_add_pc);
1297 addr_diff -= max_special_addr_diff;
1300 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1306 emit_byte (w, opcode);
1308 emit_byte (w, DW_LNS_advance_line);
1309 emit_sleb128 (w, line_diff);
1310 emit_byte (w, DW_LNS_advance_pc);
1311 emit_sleb128 (w, addr_diff);
1312 emit_byte (w, DW_LNS_copy);
1317 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1319 if (a->native_offset == b->native_offset)
1320 return a->il_offset - b->il_offset;
1322 return a->native_offset - b->native_offset;
1326 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1327 char *start_symbol, char *end_symbol,
1328 guint8 *code, guint32 code_size,
1329 MonoDebugMethodJitInfo *debug_info)
1331 guint32 prev_line = 0;
1332 guint32 prev_native_offset = 0;
1333 int i, file_index, il_offset, prev_il_offset;
1334 gboolean first = TRUE;
1335 MonoDebugSourceLocation *loc;
1336 char *prev_file_name = NULL;
1337 MonoMethodHeader *header = mono_method_get_header (method);
1338 MonoDebugMethodInfo *minfo;
1340 int *native_to_il_offset = NULL;
1345 minfo = mono_debug_lookup_method (method);
1347 /* Compute the native->IL offset mapping */
1349 g_assert (code_size);
1352 /* g_array is not implemented in eglib */
1355 ln_array = g_array_sized_new (FALSE, FALSE, sizeof (MonoDebugLineNumberEntry),
1356 debug_info->num_line_numbers);
1357 g_array_append_vals (ln_array, debug_info->line_numbers, debug_info->num_line_numbers);
1358 g_array_sort (ln_array, (GCompareFunc)compare_lne);
1359 native_to_il_offset = g_new0 (int, code_size + 1);
1361 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1363 MonoDebugLineNumberEntry lne = g_array_index (ln_array, MonoDebugLineNumberEntry, i);
1366 for (j = 0; j < lne.native_offset; ++j)
1367 native_to_il_offset [j] = -1;
1370 if (i < debug_info->num_line_numbers - 1) {
1371 MonoDebugLineNumberEntry lne_next = g_array_index (ln_array, MonoDebugLineNumberEntry, i + 1);
1373 for (j = lne.native_offset; j < lne_next.native_offset; ++j)
1374 native_to_il_offset [j] = lne.il_offset;
1376 for (j = lne.native_offset; j < code_size; ++j)
1377 native_to_il_offset [j] = lne.il_offset;
1380 g_array_free (ln_array, TRUE);
1384 prev_il_offset = -1;
1386 for (i = 0; i < code_size; ++i) {
1390 if (!debug_info->line_numbers)
1393 if (native_to_il_offset)
1394 il_offset = native_to_il_offset [i];
1396 il_offset = il_offset_from_address (method, debug_info, i);
1398 il_offset = il_offset_from_address (method, debug_info, i);
1400 g_assert (il_offset == native_to_il_offset [i]);
1403 il_offset = native_to_il_offset [i];
1407 if (il_offset == prev_il_offset)
1410 prev_il_offset = il_offset;
1412 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1414 // Added the loc->source_file check as otherwise we can
1415 // crash, see the sample in bug 553191 that makes this code
1416 // crash when we call strcmp on loc->source_file below
1417 if (loc && loc->source_file) {
1418 int line_diff = (gint32)loc->row - (gint32)prev_line;
1419 int addr_diff = i - prev_native_offset;
1422 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1425 emit_byte (w, sizeof (gpointer) + 1);
1426 emit_byte (w, DW_LNE_set_address);
1428 emit_pointer_unaligned (w, start_symbol);
1430 emit_pointer_value (w, code);
1433 * The prolog+initlocals region does not have a line number, this
1434 * makes them belong to the first line of the method.
1436 emit_byte (w, DW_LNS_advance_line);
1437 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1438 prev_line = loc->row;
1441 if (loc->row != prev_line) {
1442 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1443 /* Add an entry to the file table */
1444 /* FIXME: Avoid duplicates */
1445 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1446 g_free (prev_file_name);
1447 prev_file_name = g_strdup (loc->source_file);
1449 emit_byte (w, DW_LNS_set_file);
1450 emit_uleb128 (w, file_index);
1451 emit_byte (w, DW_LNS_copy);
1454 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1456 emit_advance_op (w, line_diff, addr_diff);
1458 prev_line = loc->row;
1459 prev_native_offset = i;
1467 g_free (prev_file_name);
1470 emit_byte (w, DW_LNS_advance_pc);
1471 emit_sleb128 (w, code_size - prev_native_offset);
1472 emit_byte (w, DW_LNS_copy);
1476 emit_byte (w, DW_LNE_end_sequence);
1477 } else if (!start_symbol) {
1478 /* No debug info, XDEBUG mode */
1480 const guint8 *ip = header->code;
1481 int prev_line, prev_native_offset;
1485 * Emit the IL code into a temporary file and emit line number info
1486 * referencing that file.
1489 name = mono_method_full_name (method, TRUE);
1490 fprintf (w->il_file, "// %s\n", name);
1491 w->il_file_line_index ++;
1494 il_to_line = g_new0 (int, header->code_size);
1496 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1498 emit_byte (w, sizeof (gpointer) + 1);
1499 emit_byte (w, DW_LNE_set_address);
1500 emit_pointer_value (w, code);
1502 // FIXME: Optimize this
1503 while (ip < header->code + header->code_size) {
1504 int il_offset = ip - header->code;
1507 w->il_file_line_index ++;
1509 dis = disasm_ins (method, ip, &ip);
1510 fprintf (w->il_file, "%s\n", dis);
1513 il_to_line [il_offset] = w->il_file_line_index;
1516 /* Emit line number info */
1518 prev_native_offset = 0;
1519 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1520 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1523 if (lne->il_offset >= header->code_size)
1525 line = il_to_line [lne->il_offset];
1528 * This seems to happen randomly, it looks like il_offset points
1529 * into the middle of an instruction.
1533 printf ("%s\n", mono_method_full_name (method, TRUE));
1534 printf ("%d %d\n", lne->il_offset, header->code_size);
1539 if (line - prev_line != 0) {
1540 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1543 prev_native_offset = lne->native_offset;
1547 emit_byte (w, DW_LNS_advance_pc);
1548 emit_sleb128 (w, code_size - prev_native_offset);
1549 emit_byte (w, DW_LNS_copy);
1553 emit_byte (w, DW_LNE_end_sequence);
1555 fflush (w->il_file);
1556 g_free (il_to_line);
1560 static MonoMethodVar*
1561 find_vmv (MonoCompile *cfg, MonoInst *ins)
1566 for (j = 0; j < cfg->num_varinfo; ++j) {
1567 if (cfg->varinfo [j] == ins)
1571 if (j < cfg->num_varinfo) {
1572 return MONO_VARINFO (cfg, j);
1580 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)
1583 MonoMethodSignature *sig;
1584 MonoMethodHeader *header;
1585 char **names, **tdies, **local_tdies;
1592 emit_section_change (w, ".debug_info", 0);
1594 sig = mono_method_signature (method);
1595 header = mono_method_get_header (method);
1597 /* Parameter types */
1598 tdies = g_new0 (char *, sig->param_count + sig->hasthis);
1599 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1602 if (i == 0 && sig->hasthis) {
1603 if (method->klass->valuetype)
1604 t = &method->klass->this_arg;
1606 t = &method->klass->byval_arg;
1608 t = sig->params [i - sig->hasthis];
1615 local_tdies = g_new0 (char *, header->num_locals);
1616 for (i = 0; i < header->num_locals; ++i) {
1617 emit_type (w, header->locals [i]);
1621 names = g_new0 (char *, sig->param_count);
1622 mono_method_get_param_names (method, (const char **) names);
1624 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1625 name = mono_method_full_name (method, FALSE);
1626 emit_string (w, name);
1629 emit_pointer_unaligned (w, start_symbol);
1630 emit_pointer_unaligned (w, end_symbol);
1632 emit_pointer_value (w, code);
1633 emit_pointer_value (w, code + code_size);
1637 emit_byte (w, DW_OP_breg6);
1641 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1642 MonoInst *arg = args ? args [i] : NULL;
1645 char pname_buf [128];
1646 MonoMethodVar *vmv = NULL;
1647 gboolean need_loclist = FALSE;
1649 vmv = find_vmv (cfg, arg);
1650 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1651 need_loclist = TRUE;
1653 if (i == 0 && sig->hasthis) {
1654 if (method->klass->valuetype)
1655 t = &method->klass->this_arg;
1657 t = &method->klass->byval_arg;
1660 t = sig->params [i - sig->hasthis];
1661 pname = names [i - sig->hasthis];
1664 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1666 if (pname[0] == '\0') {
1667 sprintf (pname_buf, "param%d", i - sig->hasthis);
1670 emit_string (w, pname);
1672 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1673 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1675 emit_var_type (w, t);
1678 encode_var_location (w, arg, p, &p);
1680 vmv->live_range_start = 0;
1681 if (vmv->live_range_end == 0)
1682 /* FIXME: Uses made in calls are not recorded */
1683 vmv->live_range_end = code_size;
1684 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1686 emit_byte (w, p - buf);
1687 emit_bytes (w, buf, p - buf);
1693 num_locals = mono_debug_lookup_locals (method, &local_names, &local_indexes);
1695 for (i = 0; i < header->num_locals; ++i) {
1696 MonoInst *ins = locals [i];
1697 char name_buf [128];
1699 MonoMethodVar *vmv = NULL;
1700 gboolean need_loclist = FALSE;
1702 /* ins->dreg no longer contains the original vreg */
1703 vmv = find_vmv (cfg, ins);
1705 if (vmv->live_range_start) {
1706 /* This variable has a precise live range */
1707 need_loclist = TRUE;
1711 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1713 for (j = 0; j < num_locals; ++j)
1714 if (local_indexes [j] == i)
1716 if (j < num_locals) {
1717 emit_string (w, local_names [j]);
1719 sprintf (name_buf, "V_%d", i);
1720 emit_string (w, name_buf);
1723 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1724 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1726 emit_var_type (w, header->locals [i]);
1729 encode_var_location (w, ins, p, &p);
1732 if (vmv->live_range_end == 0)
1733 /* FIXME: Uses made in calls are not recorded */
1734 vmv->live_range_end = code_size;
1735 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1737 emit_byte (w, p - buf);
1738 emit_bytes (w, buf, p - buf);
1742 g_free (local_names);
1743 g_free (local_indexes);
1745 /* Subprogram end */
1746 emit_uleb128 (w, 0x0);
1750 emit_debug_info_end (w);
1752 /* Emit unwind info */
1754 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1758 /* Emit line number info */
1759 /* != could happen when using --regression */
1760 if (debug_info && (debug_info->code_start == code))
1761 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
1767 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)
1769 emit_section_change (w, ".debug_info", 0);
1772 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1773 emit_string (w, tramp_name);
1774 emit_pointer_value (w, code);
1775 emit_pointer_value (w, code + code_size);
1778 emit_byte (w, DW_OP_breg6);
1781 /* Subprogram end */
1782 emit_uleb128 (w, 0x0);
1784 emit_debug_info_end (w);
1786 /* Emit unwind info */
1787 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
1790 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */