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);
84 w->class_to_die = g_hash_table_new (NULL, NULL);
85 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
86 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
87 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
93 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
99 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
101 return w->il_file_line_index;
104 /* Wrappers around the image writer functions */
107 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
109 img_writer_emit_section_change (w->w, section_name, subsection_index);
113 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
115 img_writer_emit_push_section (w->w, section_name, subsection);
119 emit_pop_section (MonoDwarfWriter *w)
121 img_writer_emit_pop_section (w->w);
125 emit_local_symbol (MonoDwarfWriter *w, const char *name, const char *end_label, gboolean func)
127 img_writer_emit_local_symbol (w->w, name, end_label, func);
131 emit_label (MonoDwarfWriter *w, const char *name)
133 img_writer_emit_label (w->w, name);
137 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
139 img_writer_emit_bytes (w->w, buf, size);
143 emit_string (MonoDwarfWriter *w, const char *value)
145 img_writer_emit_string (w->w, value);
149 emit_line (MonoDwarfWriter *w)
151 img_writer_emit_line (w->w);
155 emit_alignment (MonoDwarfWriter *w, int size)
157 img_writer_emit_alignment (w->w, size);
161 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
163 img_writer_emit_pointer_unaligned (w->w, target);
167 emit_pointer (MonoDwarfWriter *w, const char *target)
169 img_writer_emit_pointer (w->w, target);
173 emit_int16 (MonoDwarfWriter *w, int value)
175 img_writer_emit_int16 (w->w, value);
179 emit_int32 (MonoDwarfWriter *w, int value)
181 img_writer_emit_int32 (w->w, value);
185 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
187 img_writer_emit_symbol_diff (w->w, end, start, offset);
191 emit_zero_bytes (MonoDwarfWriter *w, int num)
193 img_writer_emit_zero_bytes (w->w, num);
197 emit_byte (MonoDwarfWriter *w, guint8 val)
199 img_writer_emit_byte (w->w, val);
202 static G_GNUC_UNUSED void
203 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
206 guint8 b = value & 0x7f;
208 if (value != 0) /* more bytes to come */
214 static G_GNUC_UNUSED void
215 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
218 gboolean negative = (value < 0);
225 /* the following is unnecessary if the
226 * implementation of >>= uses an arithmetic rather
227 * than logical shift for a signed left operand
231 value |= - ((gint64)1 <<(size - 7));
232 /* sign bit of byte is second high order bit (0x40) */
233 if ((value == 0 && !(byte & 0x40)) ||
234 (value == -1 && (byte & 0x40)))
242 static G_GNUC_UNUSED void
243 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
248 guint8 b = value & 0x7f;
250 if (value != 0) /* more bytes to come */
258 static G_GNUC_UNUSED void
259 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
262 gboolean negative = (value < 0);
270 /* the following is unnecessary if the
271 * implementation of >>= uses an arithmetic rather
272 * than logical shift for a signed left operand
276 value |= - (1 <<(size - 7));
277 /* sign bit of byte is second high order bit (0x40) */
278 if ((value == 0 && !(byte & 0x40)) ||
279 (value == -1 && (byte & 0x40)))
290 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
291 int *attrs, int attrs_len)
295 emit_uleb128 (w, code);
296 emit_uleb128 (w, tag);
297 emit_byte (w, has_child);
299 for (i = 0; i < attrs_len; i++)
300 emit_uleb128 (w, attrs [i]);
306 emit_cie (MonoDwarfWriter *w)
308 emit_section_change (w, ".debug_frame", 0);
310 emit_alignment (w, 8);
313 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
314 emit_label (w, ".Lcie0_start");
315 emit_int32 (w, 0xffffffff); /* CIE id */
316 emit_byte (w, 3); /* version */
317 emit_string (w, ""); /* augmention */
318 emit_sleb128 (w, 1); /* code alignment factor */
319 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
320 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
322 w->cie_program = w->cie_program;
323 if (w->cie_program) {
325 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
326 emit_bytes (w, uw_info, uw_info_len);
330 emit_alignment (w, sizeof (gpointer));
331 emit_label (w, ".Lcie0_end");
335 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
337 gssize val = (gssize)ptr;
338 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
342 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
343 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
351 emit_section_change (w, ".debug_frame", 0);
353 sprintf (symbol1, ".Lfde%d_start", fde_index);
354 sprintf (symbol2, ".Lfde%d_end", fde_index);
355 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
356 emit_label (w, symbol1);
357 emit_int32 (w, 0); /* CIE_pointer */
359 emit_pointer (w, start_symbol); /* initial_location */
361 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
363 g_assert (code_size);
364 emit_int32 (w, code_size);
367 emit_pointer_value (w, code);
368 emit_int32 (w, code_size);
370 #if SIZEOF_VOID_P == 8
371 /* Upper 32 bits of code size */
376 if (w->cie_program) {
377 // FIXME: Check that the ops really begin with the CIE program */
380 for (i = 0; i < g_slist_length (w->cie_program); ++i)
385 /* Convert the list of MonoUnwindOps to the format used by DWARF */
386 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
387 emit_bytes (w, uw_info, uw_info_len);
390 emit_alignment (w, sizeof (mgreg_t));
391 emit_label (w, symbol2);
395 #define ABBREV_COMPILE_UNIT 1
396 #define ABBREV_SUBPROGRAM 2
397 #define ABBREV_PARAM 3
398 #define ABBREV_BASE_TYPE 4
399 #define ABBREV_STRUCT_TYPE 5
400 #define ABBREV_DATA_MEMBER 6
401 #define ABBREV_TYPEDEF 7
402 #define ABBREV_ENUM_TYPE 8
403 #define ABBREV_ENUMERATOR 9
404 #define ABBREV_NAMESPACE 10
405 #define ABBREV_VARIABLE 11
406 #define ABBREV_VARIABLE_LOCLIST 12
407 #define ABBREV_POINTER_TYPE 13
408 #define ABBREV_REFERENCE_TYPE 14
409 #define ABBREV_PARAM_LOCLIST 15
410 #define ABBREV_INHERITANCE 16
411 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
413 static int compile_unit_attr [] = {
414 DW_AT_producer ,DW_FORM_string,
415 DW_AT_name ,DW_FORM_string,
416 DW_AT_comp_dir ,DW_FORM_string,
417 DW_AT_language ,DW_FORM_data1,
418 DW_AT_low_pc ,DW_FORM_addr,
419 DW_AT_high_pc ,DW_FORM_addr,
420 DW_AT_stmt_list ,DW_FORM_data4
423 static int subprogram_attr [] = {
424 DW_AT_name , DW_FORM_string,
425 DW_AT_low_pc , DW_FORM_addr,
426 DW_AT_high_pc , DW_FORM_addr,
427 DW_AT_frame_base , DW_FORM_block1
430 static int param_attr [] = {
431 DW_AT_name, DW_FORM_string,
432 DW_AT_type, DW_FORM_ref4,
433 DW_AT_location, DW_FORM_block1
436 static int param_loclist_attr [] = {
437 DW_AT_name, DW_FORM_string,
438 DW_AT_type, DW_FORM_ref4,
439 DW_AT_location, DW_FORM_data4
442 static int base_type_attr [] = {
443 DW_AT_byte_size, DW_FORM_data1,
444 DW_AT_encoding, DW_FORM_data1,
445 DW_AT_name, DW_FORM_string
448 static int struct_type_attr [] = {
449 DW_AT_name, DW_FORM_string,
450 DW_AT_byte_size, DW_FORM_udata,
453 static int data_member_attr [] = {
454 DW_AT_name, DW_FORM_string,
455 DW_AT_type, DW_FORM_ref4,
456 DW_AT_data_member_location, DW_FORM_block1
459 static int typedef_attr [] = {
460 DW_AT_name, DW_FORM_string,
461 DW_AT_type, DW_FORM_ref4
464 static int pointer_type_attr [] = {
465 DW_AT_type, DW_FORM_ref4,
468 static int reference_type_attr [] = {
469 DW_AT_type, DW_FORM_ref4,
472 static int enum_type_attr [] = {
473 DW_AT_name, DW_FORM_string,
474 DW_AT_byte_size, DW_FORM_udata,
475 DW_AT_type, DW_FORM_ref4,
478 static int enumerator_attr [] = {
479 DW_AT_name, DW_FORM_string,
480 DW_AT_const_value, DW_FORM_sdata,
483 static int namespace_attr [] = {
484 DW_AT_name, DW_FORM_string,
487 static int variable_attr [] = {
488 DW_AT_name, DW_FORM_string,
489 DW_AT_type, DW_FORM_ref4,
490 DW_AT_location, DW_FORM_block1
493 static int variable_loclist_attr [] = {
494 DW_AT_name, DW_FORM_string,
495 DW_AT_type, DW_FORM_ref4,
496 DW_AT_location, DW_FORM_data4
499 static int inheritance_attr [] = {
500 DW_AT_type, DW_FORM_ref4,
501 DW_AT_data_member_location, DW_FORM_block1
504 typedef struct DwarfBasicType {
505 const char *die_name, *name;
511 static DwarfBasicType basic_types [] = {
512 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
513 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
514 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
515 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
516 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
517 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
518 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
519 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
520 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
521 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
522 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
523 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
524 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
525 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
526 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
527 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
528 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
531 /* Constants for encoding line number special opcodes */
532 #define OPCODE_BASE 13
534 #define LINE_RANGE 14
536 /* Subsections of the .debug_line section */
537 #define LINE_SUBSECTION_HEADER 1
538 #define LINE_SUBSECTION_INCLUDES 2
539 #define LINE_SUBSECTION_FILES 3
540 #define LINE_SUBSECTION_DATA 4
541 #define LINE_SUBSECTION_END 5
544 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
545 gint64 last_mod_time, gint64 file_size)
549 char *basename = NULL;
551 if (!w->file_to_index)
552 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
554 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
558 if (g_path_is_absolute (name)) {
559 char *dir = g_path_get_dirname (name);
561 if (!w->dir_to_index)
562 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
564 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
565 if (dir_index == 0) {
566 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
567 emit_string (w, dir);
569 dir_index = ++ w->line_number_dir_index;
570 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
575 basename = g_path_get_basename (name);
580 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
583 emit_string (w, basename);
585 emit_string (w, name);
586 emit_uleb128 (w, dir_index);
590 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
595 index = ++ w->line_number_file_index;
596 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
602 emit_line_number_info_begin (MonoDwarfWriter *w)
604 /* Line number info header */
606 * GAS seems to emit its own data to the end of the first subsection, so we use
607 * subsections 1, 2 etc:
608 * 1 - contains the header
609 * 2 - contains the file names
610 * 3 - contains the end of the header + the data
613 emit_section_change (w, ".debug_line", 0);
614 emit_label (w, ".Ldebug_line_section_start");
615 emit_section_change (w, ".debug_line", LINE_SUBSECTION_HEADER);
616 emit_label (w, ".Ldebug_line_start");
617 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
618 emit_int16 (w, 0x2); /* version */
619 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
620 emit_byte (w, 1); /* minimum_instruction_length */
621 emit_byte (w, 1); /* default_is_stmt */
622 emit_byte (w, LINE_BASE); /* line_base */
623 emit_byte (w, LINE_RANGE); /* line_range */
624 emit_byte (w, OPCODE_BASE); /* opcode_base */
625 emit_byte (w, 0); /* standard_opcode_lengths */
639 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
641 /* End of Includes */
642 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
646 emit_line_number_file_name (w, "xdb.il", 0, 0);
649 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
652 emit_label (w, ".Ldebug_line_header_end");
654 /* Emit this into a separate subsection so it gets placed at the end */
655 emit_section_change (w, ".debug_line", LINE_SUBSECTION_END);
659 emit_byte (w, DW_LNE_end_sequence);
661 emit_label (w, ".Ldebug_line_end");
665 * Some assemblers like apple's do not support subsections, so we can't place
666 * .Ldebug_info_end at the end of the section using subsections. Instead, we
667 * define it every time something gets added to the .debug_info section.
668 * The apple assember seems to use the last definition.
671 emit_debug_info_end (MonoDwarfWriter *w)
673 /* This doesn't seem to work/required with recent iphone sdk versions */
675 if (!img_writer_subsections_supported (w->w))
676 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
681 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, GSList *base_unwind_program)
683 char *s, *build_info;
686 if (!img_writer_subsections_supported (w->w))
687 /* Can't emit line number info without subsections */
688 w->emit_line = FALSE;
692 w->cie_program = base_unwind_program;
694 emit_section_change (w, ".debug_abbrev", 0);
695 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
696 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
697 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
698 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
699 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
700 param_attr, G_N_ELEMENTS (param_attr));
701 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
702 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
703 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
704 base_type_attr, G_N_ELEMENTS (base_type_attr));
705 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
706 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
707 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
708 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
709 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
710 data_member_attr, G_N_ELEMENTS (data_member_attr));
711 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
712 typedef_attr, G_N_ELEMENTS (typedef_attr));
713 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
714 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
715 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
716 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
717 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
718 namespace_attr, G_N_ELEMENTS (namespace_attr));
719 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
720 variable_attr, G_N_ELEMENTS (variable_attr));
721 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
722 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
723 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
724 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
725 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
726 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
727 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
728 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
731 emit_section_change (w, ".debug_info", 0);
732 emit_label (w, ".Ldebug_info_start");
733 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
734 emit_label (w, ".Ldebug_info_begin");
735 emit_int16 (w, 0x2); /* DWARF version 2 */
736 emit_int32 (w, 0); /* .debug_abbrev offset */
737 emit_byte (w, sizeof (gpointer)); /* address size */
739 if (img_writer_subsections_supported (w->w) && w->appending) {
740 /* Emit this into a separate section so it gets placed at the end */
741 emit_section_change (w, ".debug_info", 1);
742 emit_byte (w, 0); /* close COMPILE_UNIT */
743 emit_label (w, ".Ldebug_info_end");
744 emit_section_change (w, ".debug_info", 0);
747 /* Compilation unit */
748 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
749 build_info = mono_get_runtime_build_info ();
750 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
754 emit_string (w, "JITted code");
756 emit_byte (w, DW_LANG_C);
757 emit_pointer_value (w, 0);
758 emit_pointer_value (w, 0);
759 /* offset into .debug_line section */
760 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
763 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
764 emit_label (w, basic_types [i].die_name);
765 emit_uleb128 (w, ABBREV_BASE_TYPE);
766 emit_byte (w, basic_types [i].size);
767 emit_byte (w, basic_types [i].encoding);
768 emit_string (w, basic_types [i].name);
771 emit_debug_info_end (w);
773 /* debug_loc section */
774 emit_section_change (w, ".debug_loc", 0);
775 emit_label (w, ".Ldebug_loc_start");
777 /* debug_line section */
779 * We emit some info even if emit_line is FALSE, as the
780 * apple linker seems to require a .debug_line section.
782 emit_line_number_info_begin (w);
788 * mono_dwarf_writer_close:
790 * Finalize the emitted debugging info.
793 mono_dwarf_writer_close (MonoDwarfWriter *w)
796 emit_section_change (w, ".debug_info", 0);
797 emit_byte (w, 0); /* close COMPILE_UNIT */
798 emit_label (w, ".Ldebug_info_end");
802 static void emit_type (MonoDwarfWriter *w, MonoType *t);
803 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
806 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
811 cache = w->class_to_vtype_die;
813 cache = w->class_to_die;
815 return g_hash_table_lookup (cache, klass);
818 /* Returns the local symbol pointing to the emitted debug info */
820 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
822 char *die, *pointer_die, *reference_die;
825 MonoClassField *field;
828 gboolean emit_namespace = FALSE, has_children;
832 cache = w->class_to_vtype_die;
834 cache = w->class_to_die;
836 die = g_hash_table_lookup (cache, klass);
840 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) ||
841 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
845 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
848 if (klass->name_space && klass->name_space [0] != '\0')
849 emit_namespace = TRUE;
851 if (emit_namespace) {
852 emit_uleb128 (w, ABBREV_NAMESPACE);
853 emit_string (w, klass->name_space);
856 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
858 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
859 * to separate components.
861 for (p = full_name; *p; p ++)
865 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
866 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
867 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
870 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
871 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
872 g_hash_table_insert (cache, klass, die);
874 if (klass->enumtype) {
875 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
879 emit_uleb128 (w, ABBREV_ENUM_TYPE);
880 emit_string (w, full_name);
881 emit_uleb128 (w, size);
882 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
883 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
885 g_assert (k < G_N_ELEMENTS (basic_types));
886 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
888 /* Emit enum values */
890 while ((field = mono_class_get_fields (klass, &iter))) {
893 MonoTypeEnum def_type;
895 if (strcmp ("value__", mono_field_get_name (field)) == 0)
897 if (mono_field_is_deleted (field))
900 emit_uleb128 (w, ABBREV_ENUMERATOR);
901 emit_string (w, mono_field_get_name (field));
903 p = mono_class_get_field_default_value (field, &def_type);
904 len = mono_metadata_decode_blob_size (p, &p);
905 switch (mono_class_enum_basetype (klass)->type) {
908 case MONO_TYPE_BOOLEAN:
909 emit_sleb128 (w, *p);
914 emit_sleb128 (w, read16 (p));
918 emit_sleb128 (w, read32 (p));
922 emit_sleb128 (w, read64 (p));
926 #if SIZEOF_VOID_P == 8
927 emit_sleb128 (w, read64 (p));
929 emit_sleb128 (w, read32 (p));
933 g_assert_not_reached ();
944 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
948 /* Emit field types */
950 while ((field = mono_class_get_fields (klass, &iter))) {
951 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
954 emit_type (w, field->type);
958 has_children = parent_die || mono_class_get_fields (klass, &iter);
962 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
963 emit_string (w, full_name);
964 emit_uleb128 (w, klass->instance_size);
967 emit_uleb128 (w, ABBREV_INHERITANCE);
968 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
971 *p ++= DW_OP_plus_uconst;
972 encode_uleb128 (0, p, &p);
973 emit_byte (w, p - buf);
974 emit_bytes (w, buf, p - buf);
979 while ((field = mono_class_get_fields (klass, &iter))) {
980 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
983 fdie = get_type_die (w, field->type);
985 emit_uleb128 (w, ABBREV_DATA_MEMBER);
986 emit_string (w, field->name);
987 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
990 *p ++= DW_OP_plus_uconst;
991 if (klass->valuetype && vtype)
992 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
994 encode_uleb128 (field->offset, p, &p);
996 emit_byte (w, p - buf);
997 emit_bytes (w, buf, p - buf);
1004 emit_uleb128 (w, 0x0);
1006 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1007 emit_uleb128 (w, ABBREV_TYPEDEF);
1008 emit_string (w, full_name);
1009 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1011 /* Add a pointer type */
1012 emit_label (w, pointer_die);
1014 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1015 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1017 /* Add a reference type */
1018 emit_label (w, reference_die);
1020 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1021 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1025 if (emit_namespace) {
1027 emit_uleb128 (w, 0x0);
1033 static gboolean base_types_emitted [64];
1036 get_type_die (MonoDwarfWriter *w, MonoType *t)
1038 MonoClass *klass = mono_class_from_mono_type (t);
1043 if (t->type == MONO_TYPE_VALUETYPE) {
1044 tdie = g_hash_table_lookup (w->class_to_pointer_die, klass);
1047 tdie = get_class_die (w, klass, FALSE);
1048 /* Should return a pointer type to a reference */
1051 t = &mono_defaults.int_class->byval_arg;
1053 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1054 if (basic_types [j].type == t->type)
1056 if (j < G_N_ELEMENTS (basic_types)) {
1057 tdie = basic_types [j].die_name;
1060 case MONO_TYPE_CLASS:
1061 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1062 //tdie = ".LDIE_OBJECT";
1064 case MONO_TYPE_ARRAY:
1065 tdie = ".LDIE_OBJECT";
1067 case MONO_TYPE_VALUETYPE:
1068 if (klass->enumtype)
1069 tdie = get_class_die (w, klass, FALSE);
1073 case MONO_TYPE_GENERICINST:
1074 if (!MONO_TYPE_ISSTRUCT (t)) {
1075 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1095 emit_type (MonoDwarfWriter *w, MonoType *t)
1097 MonoClass *klass = mono_class_from_mono_type (t);
1102 if (t->type == MONO_TYPE_VALUETYPE) {
1103 tdie = emit_class_dwarf_info (w, klass, TRUE);
1108 emit_class_dwarf_info (w, klass, FALSE);
1111 t = &mono_defaults.int_class->byval_arg;
1113 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1114 if (basic_types [j].type == t->type)
1116 if (j < G_N_ELEMENTS (basic_types)) {
1117 /* Emit a boxed version of base types */
1118 if (j < 64 && !base_types_emitted [j]) {
1119 emit_class_dwarf_info (w, klass, FALSE);
1120 base_types_emitted [j] = TRUE;
1124 case MONO_TYPE_CLASS:
1125 emit_class_dwarf_info (w, klass, FALSE);
1127 case MONO_TYPE_ARRAY:
1129 case MONO_TYPE_VALUETYPE:
1130 if (klass->enumtype)
1131 emit_class_dwarf_info (w, klass, FALSE);
1133 case MONO_TYPE_GENERICINST:
1134 if (!MONO_TYPE_ISSTRUCT (t))
1135 emit_class_dwarf_info (w, klass, FALSE);
1146 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1150 tdie = get_type_die (w, t);
1152 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1156 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1159 /* FIXME: This needs a location list, since the args can go from reg->stack */
1160 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1161 /* gdb treats this as optimized out */
1162 } else if (ins->opcode == OP_REGVAR) {
1163 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1165 } else if (ins->opcode == OP_REGOFFSET) {
1166 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1167 encode_sleb128 (ins->inst_offset, p, &p);
1177 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1178 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1179 guint8 *expr, guint32 expr_len)
1183 emit_push_section (w, ".debug_loc", 0);
1184 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1185 emit_label (w, label);
1187 emit_pointer_value (w, loclist_begin_addr);
1188 emit_pointer_value (w, loclist_end_addr);
1189 emit_byte (w, expr_len % 256);
1190 emit_byte (w, expr_len / 256);
1191 emit_bytes (w, expr, expr_len);
1193 emit_pointer_value (w, NULL);
1194 emit_pointer_value (w, NULL);
1196 emit_pop_section (w);
1197 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1201 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1202 * it is a public header.
1204 static const guint8 *token_handler_ip;
1207 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1210 MonoMethod *cmethod;
1212 MonoClassField *field;
1213 gpointer data = NULL;
1215 if (method->wrapper_type)
1216 data = mono_method_get_wrapper_data (method, token);
1218 switch (*token_handler_ip) {
1222 if (method->wrapper_type)
1225 klass = mono_class_get_full (method->klass->image, token, NULL);
1226 res = g_strdup_printf ("<%s>", klass->name);
1231 if (method->wrapper_type)
1234 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1235 desc = mono_method_full_name (cmethod, TRUE);
1236 res = g_strdup_printf ("<%s>", desc);
1240 if (method->wrapper_type) {
1241 desc = mono_signature_get_desc (data, FALSE);
1242 res = g_strdup_printf ("<%s>", desc);
1245 res = g_strdup_printf ("<0x%08x>", token);
1252 if (method->wrapper_type)
1255 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1256 desc = mono_field_full_name (field);
1257 res = g_strdup_printf ("<%s>", desc);
1261 res = g_strdup_printf ("<0x%08x>", token);
1271 * Produce a disassembled form of the IL instruction at IP. This is an extension
1272 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1273 * CEE_MONO_ opcodes.
1276 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1280 MonoMethodHeader *header = mono_method_get_header (method);
1282 memset (&dh, 0, sizeof (dh));
1284 dh.label_format = "IL_%04x: ";
1285 dh.label_target = "IL_%04x";
1286 dh.tokener = token_handler;
1288 token_handler_ip = ip;
1289 if (*ip == MONO_CUSTOM_PREFIX) {
1294 case CEE_MONO_ICALL: {
1295 MonoJitICallInfo *info;
1297 token = read32 (ip + 2);
1298 data = mono_method_get_wrapper_data (method, token);
1299 info = mono_find_jit_icall_by_addr (data);
1302 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1306 case CEE_MONO_CLASSCONST: {
1307 token = read32 (ip + 2);
1308 data = mono_method_get_wrapper_data (method, token);
1310 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1315 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1318 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1320 token_handler_ip = NULL;
1323 mono_metadata_free_mh (header);
1328 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1329 guint32 native_offset)
1333 if (!jit->line_numbers)
1336 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1337 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1339 if (lne.native_offset <= native_offset)
1340 return lne.il_offset;
1346 static int max_special_addr_diff = 0;
1349 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1353 /* Use a special opcode if possible */
1354 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1355 if (max_special_addr_diff == 0)
1356 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1358 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1359 emit_byte (w, DW_LNS_const_add_pc);
1360 addr_diff -= max_special_addr_diff;
1363 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1369 emit_byte (w, opcode);
1371 emit_byte (w, DW_LNS_advance_line);
1372 emit_sleb128 (w, line_diff);
1373 emit_byte (w, DW_LNS_advance_pc);
1374 emit_sleb128 (w, addr_diff);
1375 emit_byte (w, DW_LNS_copy);
1380 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1382 if (a->native_offset == b->native_offset)
1383 return a->il_offset - b->il_offset;
1385 return a->native_offset - b->native_offset;
1389 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1390 char *start_symbol, char *end_symbol,
1391 guint8 *code, guint32 code_size,
1392 MonoDebugMethodJitInfo *debug_info)
1394 guint32 prev_line = 0;
1395 guint32 prev_native_offset = 0;
1396 int i, file_index, il_offset, prev_il_offset;
1397 gboolean first = TRUE;
1398 MonoDebugSourceLocation *loc;
1399 char *prev_file_name = NULL;
1400 MonoMethodHeader *header = mono_method_get_header (method);
1401 MonoDebugMethodInfo *minfo;
1402 MonoDebugLineNumberEntry *ln_array;
1403 int *native_to_il_offset = NULL;
1405 if (!w->emit_line) {
1406 mono_metadata_free_mh (header);
1410 minfo = mono_debug_lookup_method (method);
1412 /* Compute the native->IL offset mapping */
1414 g_assert (code_size);
1416 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1417 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1419 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
1421 native_to_il_offset = g_new0 (int, code_size + 1);
1423 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1425 MonoDebugLineNumberEntry *lne = &ln_array [i];
1428 for (j = 0; j < lne->native_offset; ++j)
1429 native_to_il_offset [j] = -1;
1432 if (i < debug_info->num_line_numbers - 1) {
1433 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1435 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1436 native_to_il_offset [j] = lne->il_offset;
1438 for (j = lne->native_offset; j < code_size; ++j)
1439 native_to_il_offset [j] = lne->il_offset;
1445 prev_il_offset = -1;
1447 for (i = 0; i < code_size; ++i) {
1451 if (!debug_info->line_numbers)
1454 if (native_to_il_offset)
1455 il_offset = native_to_il_offset [i];
1457 il_offset = il_offset_from_address (method, debug_info, i);
1459 il_offset = il_offset_from_address (method, debug_info, i);
1461 g_assert (il_offset == native_to_il_offset [i]);
1464 il_offset = native_to_il_offset [i];
1468 if (il_offset == prev_il_offset)
1471 prev_il_offset = il_offset;
1473 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1475 // Added the loc->source_file check as otherwise we can
1476 // crash, see the sample in bug 553191 that makes this code
1477 // crash when we call strcmp on loc->source_file below
1478 if (loc && loc->source_file) {
1479 int line_diff = (gint32)loc->row - (gint32)prev_line;
1480 int addr_diff = i - prev_native_offset;
1483 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1486 emit_byte (w, sizeof (gpointer) + 1);
1487 emit_byte (w, DW_LNE_set_address);
1489 emit_pointer_unaligned (w, start_symbol);
1491 emit_pointer_value (w, code);
1494 * The prolog+initlocals region does not have a line number, this
1495 * makes them belong to the first line of the method.
1497 emit_byte (w, DW_LNS_advance_line);
1498 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1499 prev_line = loc->row;
1502 if (loc->row != prev_line) {
1503 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1504 /* Add an entry to the file table */
1505 /* FIXME: Avoid duplicates */
1506 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1507 g_free (prev_file_name);
1508 prev_file_name = g_strdup (loc->source_file);
1510 emit_byte (w, DW_LNS_set_file);
1511 emit_uleb128 (w, file_index);
1512 emit_byte (w, DW_LNS_copy);
1515 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1517 emit_advance_op (w, line_diff, addr_diff);
1519 prev_line = loc->row;
1520 prev_native_offset = i;
1525 mono_debug_symfile_free_location (loc);
1529 g_free (native_to_il_offset);
1530 g_free (prev_file_name);
1533 emit_byte (w, DW_LNS_advance_pc);
1534 emit_sleb128 (w, code_size - prev_native_offset);
1535 emit_byte (w, DW_LNS_copy);
1539 emit_byte (w, DW_LNE_end_sequence);
1540 } else if (!start_symbol) {
1541 /* No debug info, XDEBUG mode */
1543 const guint8 *ip = header->code;
1544 int prev_line, prev_native_offset;
1548 * Emit the IL code into a temporary file and emit line number info
1549 * referencing that file.
1552 name = mono_method_full_name (method, TRUE);
1553 fprintf (w->il_file, "// %s\n", name);
1554 w->il_file_line_index ++;
1557 il_to_line = g_new0 (int, header->code_size);
1559 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1561 emit_byte (w, sizeof (gpointer) + 1);
1562 emit_byte (w, DW_LNE_set_address);
1563 emit_pointer_value (w, code);
1565 // FIXME: Optimize this
1566 while (ip < header->code + header->code_size) {
1567 int il_offset = ip - header->code;
1570 w->il_file_line_index ++;
1572 dis = disasm_ins (method, ip, &ip);
1573 fprintf (w->il_file, "%s\n", dis);
1576 il_to_line [il_offset] = w->il_file_line_index;
1579 /* Emit line number info */
1581 prev_native_offset = 0;
1582 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1583 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1586 if (lne->il_offset >= header->code_size)
1588 line = il_to_line [lne->il_offset];
1591 * This seems to happen randomly, it looks like il_offset points
1592 * into the middle of an instruction.
1596 printf ("%s\n", mono_method_full_name (method, TRUE));
1597 printf ("%d %d\n", lne->il_offset, header->code_size);
1602 if (line - prev_line != 0) {
1603 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1606 prev_native_offset = lne->native_offset;
1610 emit_byte (w, DW_LNS_advance_pc);
1611 emit_sleb128 (w, code_size - prev_native_offset);
1612 emit_byte (w, DW_LNS_copy);
1616 emit_byte (w, DW_LNE_end_sequence);
1618 fflush (w->il_file);
1619 g_free (il_to_line);
1621 mono_metadata_free_mh (header);
1624 static MonoMethodVar*
1625 find_vmv (MonoCompile *cfg, MonoInst *ins)
1630 for (j = 0; j < cfg->num_varinfo; ++j) {
1631 if (cfg->varinfo [j] == ins)
1635 if (j < cfg->num_varinfo) {
1636 return MONO_VARINFO (cfg, j);
1644 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)
1647 MonoMethodSignature *sig;
1648 MonoMethodHeader *header;
1650 MonoDebugLocalsInfo *locals_info;
1655 emit_section_change (w, ".debug_info", 0);
1657 sig = mono_method_signature (method);
1658 header = mono_method_get_header (method);
1660 /* Parameter types */
1661 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1664 if (i == 0 && sig->hasthis) {
1665 if (method->klass->valuetype)
1666 t = &method->klass->this_arg;
1668 t = &method->klass->byval_arg;
1670 t = sig->params [i - sig->hasthis];
1675 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1678 for (i = 0; i < header->num_locals; ++i) {
1679 emit_type (w, header->locals [i]);
1683 names = g_new0 (char *, sig->param_count);
1684 mono_method_get_param_names (method, (const char **) names);
1686 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1687 name = mono_method_full_name (method, FALSE);
1688 emit_string (w, name);
1691 emit_pointer_unaligned (w, start_symbol);
1692 emit_pointer_unaligned (w, end_symbol);
1694 emit_pointer_value (w, code);
1695 emit_pointer_value (w, code + code_size);
1699 emit_byte (w, DW_OP_breg6);
1703 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1704 MonoInst *arg = args ? args [i] : NULL;
1707 char pname_buf [128];
1708 MonoMethodVar *vmv = NULL;
1709 gboolean need_loclist = FALSE;
1711 vmv = find_vmv (cfg, arg);
1712 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1713 need_loclist = TRUE;
1715 if (i == 0 && sig->hasthis) {
1716 if (method->klass->valuetype)
1717 t = &method->klass->this_arg;
1719 t = &method->klass->byval_arg;
1722 t = sig->params [i - sig->hasthis];
1723 pname = names [i - sig->hasthis];
1726 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1728 if (pname[0] == '\0') {
1729 sprintf (pname_buf, "param%d", i - sig->hasthis);
1732 emit_string (w, pname);
1734 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1735 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1737 emit_var_type (w, t);
1740 encode_var_location (w, arg, p, &p);
1742 vmv->live_range_start = 0;
1743 if (vmv->live_range_end == 0)
1744 /* FIXME: Uses made in calls are not recorded */
1745 vmv->live_range_end = code_size;
1746 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1748 emit_byte (w, p - buf);
1749 emit_bytes (w, buf, p - buf);
1755 locals_info = mono_debug_lookup_locals (method);
1757 for (i = 0; i < header->num_locals; ++i) {
1758 MonoInst *ins = locals [i];
1759 char name_buf [128];
1761 MonoMethodVar *vmv = NULL;
1762 gboolean need_loclist = FALSE;
1765 /* ins->dreg no longer contains the original vreg */
1766 vmv = find_vmv (cfg, ins);
1768 if (vmv->live_range_start) {
1769 /* This variable has a precise live range */
1770 need_loclist = TRUE;
1774 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1778 for (j = 0; j < locals_info->num_locals; ++j)
1779 if (locals_info->locals [j].index == i)
1781 if (j < locals_info->num_locals)
1782 lname = locals_info->locals [j].name;
1785 emit_string (w, lname);
1787 sprintf (name_buf, "V_%d", i);
1788 emit_string (w, name_buf);
1791 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1792 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1794 emit_var_type (w, header->locals [i]);
1797 encode_var_location (w, ins, p, &p);
1800 if (vmv->live_range_end == 0)
1801 /* FIXME: Uses made in calls are not recorded */
1802 vmv->live_range_end = code_size;
1803 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1805 emit_byte (w, p - buf);
1806 emit_bytes (w, buf, p - buf);
1811 mono_debug_symfile_free_locals (locals_info);
1813 /* Subprogram end */
1814 emit_uleb128 (w, 0x0);
1818 emit_debug_info_end (w);
1820 /* Emit unwind info */
1822 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1826 /* Emit line number info */
1827 /* != could happen when using --regression */
1828 if (debug_info && (debug_info->code_start == code))
1829 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
1832 mono_metadata_free_mh (header);
1836 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)
1838 emit_section_change (w, ".debug_info", 0);
1841 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1842 emit_string (w, tramp_name);
1843 emit_pointer_value (w, code);
1844 emit_pointer_value (w, code + code_size);
1847 emit_byte (w, DW_OP_breg6);
1850 /* Subprogram end */
1851 emit_uleb128 (w, 0x0);
1853 emit_debug_info_end (w);
1855 /* Emit unwind info */
1856 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
1859 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */