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update readme (#21797)
[mono-project.git] / mono / mini / dwarfwriter.c
blobcf7bbef54ab5b4894fd206169e43ab165d372729
1 /**
2 * \file
3 * Creation of DWARF debug information
4 *
5 * Author:
6 * Zoltan Varga (vargaz@gmail.com)
7 *
8 * (C) 2008-2009 Novell, Inc.
9 */
10
11 #include "config.h"
12 #include <mono/utils/mono-compiler.h>
13
14 #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
15 #include "dwarfwriter.h"
16
17 #include <sys/types.h>
18 #include <ctype.h>
19 #include <string.h>
20 #ifdef HAVE_STDINT_H
21 #include <stdint.h>
22 #endif
23
24 #include <mono/metadata/mono-endian.h>
25 #include <mono/metadata/debug-internals.h>
26 #include <mono/metadata/abi-details.h>
27
28 #ifndef HOST_WIN32
29 #include <mono/utils/freebsd-elf32.h>
30 #include <mono/utils/freebsd-elf64.h>
31 #endif
32
33 #include <mono/utils/freebsd-dwarf.h>
34
35 #define DW_AT_MIPS_linkage_name 0x2007
36 #define DW_LNE_set_prologue_end 0x0a
37
38 typedef struct {
39 MonoMethod *method;
40 char *start_symbol, *end_symbol;
41 guint8 *code;
42 guint32 code_size;
43 } MethodLineNumberInfo;
44
45 struct _MonoDwarfWriter
46 {
47 MonoImageWriter *w;
48 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
49 GHashTable *class_to_reference_die;
50 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
51 GHashTable *file_to_index, *index_to_file, *dir_to_index;
52 FILE *il_file;
53 int il_file_line_index, loclist_index;
54 GSList *cie_program;
55 FILE *fp;
56 const char *temp_prefix;
57 gboolean emit_line;
58 GSList *line_info;
59 int cur_file_index;
60 };
61
62 static void
63 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
64 char *start_symbol, char *end_symbol,
65 guint8 *code, guint32 code_size,
66 MonoDebugMethodJitInfo *debug_info);
67
68 /*
69 * mono_dwarf_writer_create:
70 *
71 * Create a DWARF writer object. WRITER is the underlying image writer this
72 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
73 * methods which have no line number info. It can be NULL.
74 */
75 MonoDwarfWriter*
76 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean emit_line_numbers)
77 {
78 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
79
80 w->w = writer;
81 w->il_file = il_file;
82 w->il_file_line_index = il_file_start_line;
83
84 w->emit_line = emit_line_numbers;
85
86 w->fp = mono_img_writer_get_fp (w->w);
87 w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
88
89 w->class_to_die = g_hash_table_new (NULL, NULL);
90 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
91 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
92 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
93 w->cur_file_index = -1;
94
95 return w;
96 }
97
98 void
99 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
100 {
101 g_free (w);
102 }
103
104 int
105 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
106 {
107 return w->il_file_line_index;
108 }
109
110 /* Wrappers around the image writer functions */
111
112 static void
113 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
114 {
115 mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
116 }
117
118 static void
119 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
120 {
121 mono_img_writer_emit_push_section (w->w, section_name, subsection);
122 }
123
124 static void
125 emit_pop_section (MonoDwarfWriter *w)
126 {
127 mono_img_writer_emit_pop_section (w->w);
128 }
129
130 static void
131 emit_label (MonoDwarfWriter *w, const char *name)
132 {
133 mono_img_writer_emit_label (w->w, name);
134 }
135
136 static void
137 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
138 {
139 mono_img_writer_emit_bytes (w->w, buf, size);
140 }
141
142 static void
143 emit_string (MonoDwarfWriter *w, const char *value)
144 {
145 mono_img_writer_emit_string (w->w, value);
146 }
147
148 static void
149 emit_line (MonoDwarfWriter *w)
150 {
151 mono_img_writer_emit_line (w->w);
152 }
153
154 static void
155 emit_alignment (MonoDwarfWriter *w, int size)
156 {
157 mono_img_writer_emit_alignment (w->w, size);
158 }
159
160 static void
161 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
162 {
163 mono_img_writer_emit_pointer_unaligned (w->w, target);
164 }
165
166 static void
167 emit_pointer (MonoDwarfWriter *w, const char *target)
168 {
169 mono_img_writer_emit_pointer (w->w, target);
170 }
171
172 static void
173 emit_int16 (MonoDwarfWriter *w, int value)
174 {
175 mono_img_writer_emit_int16 (w->w, value);
176 }
177
178 static void
179 emit_int32 (MonoDwarfWriter *w, int value)
180 {
181 mono_img_writer_emit_int32 (w->w, value);
182 }
183
184 static void
185 emit_symbol (MonoDwarfWriter *w, const char *symbol)
186 {
187 mono_img_writer_emit_symbol (w->w, symbol);
188 }
189
190 static void
191 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
192 {
193 mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
194 }
195
196 static void
197 emit_byte (MonoDwarfWriter *w, guint8 val)
198 {
199 mono_img_writer_emit_byte (w->w, val);
200 }
201
202 static void
203 emit_escaped_string (MonoDwarfWriter *w, char *value)
204 {
205 int i, len;
206
207 len = strlen (value);
208 for (i = 0; i < len; ++i) {
209 char c = value [i];
210 if (!(isalnum (c))) {
211 switch (c) {
212 case '_':
213 case '-':
214 case ':':
215 case '.':
216 case ',':
217 case '/':
218 case '<':
219 case '>':
220 case '`':
221 case '(':
222 case ')':
223 case '[':
224 case ']':
225 break;
226 default:
227 value [i] = '_';
228 break;
229 }
230 }
231 }
232 mono_img_writer_emit_string (w->w, value);
233 }
234
235 static G_GNUC_UNUSED void
236 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
237 {
238 do {
239 guint8 b = value & 0x7f;
240 value >>= 7;
241 if (value != 0) /* more bytes to come */
242 b |= 0x80;
243 emit_byte (w, b);
244 } while (value);
245 }
246
247 static G_GNUC_UNUSED void
248 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
249 {
250 gboolean more = 1;
251 gboolean negative = (value < 0);
252 guint32 size = 64;
253 guint8 byte;
254
255 while (more) {
256 byte = value & 0x7f;
257 value >>= 7;
258 /* the following is unnecessary if the
259 * implementation of >>= uses an arithmetic rather
260 * than logical shift for a signed left operand
261 */
262 if (negative)
263 /* sign extend */
264 value |= - ((gint64)1 <<(size - 7));
265 /* sign bit of byte is second high order bit (0x40) */
266 if ((value == 0 && !(byte & 0x40)) ||
267 (value == -1 && (byte & 0x40)))
268 more = 0;
269 else
270 byte |= 0x80;
271 emit_byte (w, byte);
272 }
273 }
274
275 static G_GNUC_UNUSED void
276 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
277 {
278 guint8 *p = buf;
279
280 do {
281 guint8 b = value & 0x7f;
282 value >>= 7;
283 if (value != 0) /* more bytes to come */
284 b |= 0x80;
285 *p ++ = b;
286 } while (value);
287
288 *endbuf = p;
289 }
290
291 static G_GNUC_UNUSED void
292 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
293 {
294 gboolean more = 1;
295 gboolean negative = (value < 0);
296 guint32 size = 32;
297 guint8 byte;
298 guint8 *p = buf;
299
300 while (more) {
301 byte = value & 0x7f;
302 value >>= 7;
303 /* the following is unnecessary if the
304 * implementation of >>= uses an arithmetic rather
305 * than logical shift for a signed left operand
306 */
307 if (negative)
308 /* sign extend */
309 value |= - (1 <<(size - 7));
310 /* sign bit of byte is second high order bit (0x40) */
311 if ((value == 0 && !(byte & 0x40)) ||
312 (value == -1 && (byte & 0x40)))
313 more = 0;
314 else
315 byte |= 0x80;
316 *p ++= byte;
317 }
318
319 *endbuf = p;
320 }
321
322 static void
323 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
324 int *attrs, int attrs_len)
325 {
326 int i;
327
328 emit_uleb128 (w, code);
329 emit_uleb128 (w, tag);
330 emit_byte (w, has_child);
331
332 for (i = 0; i < attrs_len; i++)
333 emit_uleb128 (w, attrs [i]);
334 emit_uleb128 (w, 0);
335 emit_uleb128 (w, 0);
336 }
337
338 static void
339 emit_cie (MonoDwarfWriter *w)
340 {
341 emit_section_change (w, ".debug_frame", 0);
342
343 emit_alignment (w, 8);
344
345 /* Emit a CIE */
346 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
347 emit_label (w, ".Lcie0_start");
348 emit_int32 (w, 0xffffffff); /* CIE id */
349 emit_byte (w, 3); /* version */
350 emit_string (w, ""); /* augmention */
351 emit_sleb128 (w, 1); /* code alignment factor */
352 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
353 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
354
355 w->cie_program = w->cie_program;
356 if (w->cie_program) {
357 guint32 uw_info_len;
358 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
359 emit_bytes (w, uw_info, uw_info_len);
360 g_free (uw_info);
361 }
362
363 emit_alignment (w, sizeof (target_mgreg_t));
364 emit_label (w, ".Lcie0_end");
365 }
366
367 static void
368 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
369 {
370 gssize val = (gssize)ptr;
371 emit_bytes (w, (guint8*)&val, sizeof (target_mgreg_t));
372 }
373
374 static void
375 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
376 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
377 {
378 char symbol1 [128];
379 char symbol2 [128];
380 GSList *l;
381 guint8 *uw_info;
382 guint32 uw_info_len;
383
384 emit_section_change (w, ".debug_frame", 0);
385
386 sprintf (symbol1, ".Lfde%d_start", fde_index);
387 sprintf (symbol2, ".Lfde%d_end", fde_index);
388 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
389 emit_label (w, symbol1);
390 emit_int32 (w, 0); /* CIE_pointer */
391 if (start_symbol) {
392 emit_pointer (w, start_symbol); /* initial_location */
393 if (end_symbol)
394 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
395 else {
396 g_assert (code_size);
397 emit_int32 (w, code_size);
398 }
399 } else {
400 emit_pointer_value (w, code);
401 emit_int32 (w, code_size);
402 }
403 #if TARGET_SIZEOF_VOID_P == 8
404 /* Upper 32 bits of code size */
405 emit_int32 (w, 0);
406 #endif
407
408 l = unwind_ops;
409 if (w->cie_program) {
410 // FIXME: Check that the ops really begin with the CIE program */
411 int i;
412
413 for (i = 0; i < g_slist_length (w->cie_program); ++i)
414 if (l)
415 l = l->next;
416 }
417
418 /* Convert the list of MonoUnwindOps to the format used by DWARF */
419 uw_info = mono_unwind_ops_encode_full (l, &uw_info_len, FALSE);
420 emit_bytes (w, uw_info, uw_info_len);
421 g_free (uw_info);
422
423 emit_alignment (w, sizeof (target_mgreg_t));
424 emit_label (w, symbol2);
425 }
426
427 /* Abbrevations */
428 #define ABBREV_COMPILE_UNIT 1
429 #define ABBREV_SUBPROGRAM 2
430 #define ABBREV_PARAM 3
431 #define ABBREV_BASE_TYPE 4
432 #define ABBREV_STRUCT_TYPE 5
433 #define ABBREV_DATA_MEMBER 6
434 #define ABBREV_TYPEDEF 7
435 #define ABBREV_ENUM_TYPE 8
436 #define ABBREV_ENUMERATOR 9
437 #define ABBREV_NAMESPACE 10
438 #define ABBREV_VARIABLE 11
439 #define ABBREV_VARIABLE_LOCLIST 12
440 #define ABBREV_POINTER_TYPE 13
441 #define ABBREV_REFERENCE_TYPE 14
442 #define ABBREV_PARAM_LOCLIST 15
443 #define ABBREV_INHERITANCE 16
444 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
445 #define ABBREV_TRAMP_SUBPROGRAM 18
446
447 static int compile_unit_attr [] = {
448 DW_AT_producer ,DW_FORM_string,
449 DW_AT_name ,DW_FORM_string,
450 DW_AT_comp_dir ,DW_FORM_string,
451 DW_AT_language ,DW_FORM_data1,
452 DW_AT_low_pc ,DW_FORM_addr,
453 DW_AT_high_pc ,DW_FORM_addr,
454 DW_AT_stmt_list ,DW_FORM_data4
455 };
456
457 static int subprogram_attr [] = {
458 DW_AT_name , DW_FORM_string,
459 DW_AT_MIPS_linkage_name, DW_FORM_string,
460 DW_AT_decl_file , DW_FORM_udata,
461 DW_AT_decl_line , DW_FORM_udata,
462 #ifndef TARGET_IOS
463 DW_AT_description , DW_FORM_string,
464 #endif
465 DW_AT_low_pc , DW_FORM_addr,
466 DW_AT_high_pc , DW_FORM_addr,
467 DW_AT_frame_base , DW_FORM_block1
468 };
469
470 static int tramp_subprogram_attr [] = {
471 DW_AT_name , DW_FORM_string,
472 DW_AT_low_pc , DW_FORM_addr,
473 DW_AT_high_pc , DW_FORM_addr,
474 };
475
476 static int param_attr [] = {
477 DW_AT_name, DW_FORM_string,
478 DW_AT_type, DW_FORM_ref4,
479 DW_AT_location, DW_FORM_block1
480 };
481
482 static int param_loclist_attr [] = {
483 DW_AT_name, DW_FORM_string,
484 DW_AT_type, DW_FORM_ref4,
485 DW_AT_location, DW_FORM_data4
486 };
487
488 static int base_type_attr [] = {
489 DW_AT_byte_size, DW_FORM_data1,
490 DW_AT_encoding, DW_FORM_data1,
491 DW_AT_name, DW_FORM_string
492 };
493
494 static int struct_type_attr [] = {
495 DW_AT_name, DW_FORM_string,
496 DW_AT_byte_size, DW_FORM_udata,
497 };
498
499 static int data_member_attr [] = {
500 DW_AT_name, DW_FORM_string,
501 DW_AT_type, DW_FORM_ref4,
502 DW_AT_data_member_location, DW_FORM_block1
503 };
504
505 static int typedef_attr [] = {
506 DW_AT_name, DW_FORM_string,
507 DW_AT_type, DW_FORM_ref4
508 };
509
510 static int pointer_type_attr [] = {
511 DW_AT_type, DW_FORM_ref4,
512 };
513
514 static int reference_type_attr [] = {
515 DW_AT_type, DW_FORM_ref4,
516 };
517
518 static int enum_type_attr [] = {
519 DW_AT_name, DW_FORM_string,
520 DW_AT_byte_size, DW_FORM_udata,
521 DW_AT_type, DW_FORM_ref4,
522 };
523
524 static int enumerator_attr [] = {
525 DW_AT_name, DW_FORM_string,
526 DW_AT_const_value, DW_FORM_sdata,
527 };
528
529 static int namespace_attr [] = {
530 DW_AT_name, DW_FORM_string,
531 };
532
533 static int variable_attr [] = {
534 DW_AT_name, DW_FORM_string,
535 DW_AT_type, DW_FORM_ref4,
536 DW_AT_location, DW_FORM_block1
537 };
538
539 static int variable_loclist_attr [] = {
540 DW_AT_name, DW_FORM_string,
541 DW_AT_type, DW_FORM_ref4,
542 DW_AT_location, DW_FORM_data4
543 };
544
545 static int inheritance_attr [] = {
546 DW_AT_type, DW_FORM_ref4,
547 DW_AT_data_member_location, DW_FORM_block1
548 };
549
550 typedef struct DwarfBasicType {
551 const char *die_name, *name;
552 int type;
553 int size;
554 int encoding;
555 } DwarfBasicType;
556
557 static DwarfBasicType basic_types [] = {
558 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
559 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
560 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
561 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
562 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
563 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
564 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
565 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
566 { ".LDIE_I", "intptr", MONO_TYPE_I, TARGET_SIZEOF_VOID_P, DW_ATE_signed },
567 { ".LDIE_U", "uintptr", MONO_TYPE_U, TARGET_SIZEOF_VOID_P, DW_ATE_unsigned },
568 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
569 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
570 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
571 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
572 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (target_mgreg_t), DW_ATE_address },
573 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (target_mgreg_t), DW_ATE_address },
574 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (target_mgreg_t), DW_ATE_address },
575 };
576
577 /* Constants for encoding line number special opcodes */
578 #define OPCODE_BASE 13
579 #define LINE_BASE -5
580 #define LINE_RANGE 14
581
582 static int
583 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
584 {
585 int index;
586
587 g_assert (w->file_to_index);
588 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
589 g_assert (index > 0);
590 return index - 1;
591 }
592
593 static int
594 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
595 gint64 last_mod_time, gint64 file_size)
596 {
597 int index;
598 char *copy;
599
600 if (!w->file_to_index) {
601 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
602 w->index_to_file = g_hash_table_new (NULL, NULL);
603 }
604
605 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
606 if (index > 0)
607 return index - 1;
608 index = w->line_number_file_index;
609 w->line_number_file_index ++;
610 copy = g_strdup (name);
611 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
612 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
613
614 return index;
615 }
616
617 char *
618 mono_dwarf_escape_path (const char *name)
619 {
620 if (strchr (name, '\\')) {
621 char *s;
622 int len, i, j;
623
624 len = strlen (name);
625 s = (char *)g_malloc0 ((len + 1) * 2);
626 j = 0;
627 for (i = 0; i < len; ++i) {
628 if (name [i] == '\\') {
629 s [j ++] = '\\';
630 s [j ++] = '\\';
631 } else {
632 s [j ++] = name [i];
633 }
634 }
635 return s;
636 }
637 return g_strdup (name);
638 }
639
640 static void
641 emit_all_line_number_info (MonoDwarfWriter *w)
642 {
643 int i;
644 GHashTable *dir_to_index, *index_to_dir;
645 GSList *l;
646 GSList *info_list;
647
648 add_line_number_file_name (w, "<unknown>", 0, 0);
649
650 /* Collect files */
651 info_list = g_slist_reverse (w->line_info);
652 for (l = info_list; l; l = l->next) {
653 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
654 MonoDebugMethodInfo *minfo;
655 GPtrArray *source_file_list;
656
657 // FIXME: Free stuff
658 minfo = mono_debug_lookup_method (info->method);
659 if (!minfo)
660 continue;
661
662 mono_debug_get_seq_points (minfo, NULL, &source_file_list, NULL, NULL, NULL);
663 for (i = 0; i < source_file_list->len; ++i) {
664 MonoDebugSourceInfo *sinfo = (MonoDebugSourceInfo *)g_ptr_array_index (source_file_list, i);
665 add_line_number_file_name (w, sinfo->source_file, 0, 0);
666 }
667 }
668
669 /* Preprocess files */
670 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
671 index_to_dir = g_hash_table_new (NULL, NULL);
672 for (i = 0; i < w->line_number_file_index; ++i) {
673 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
674 char *copy;
675 int dir_index = 0;
676
677 if (g_path_is_absolute (name)) {
678 char *dir = g_path_get_dirname (name);
679
680 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
681 if (dir_index == 0) {
682 dir_index = w->line_number_dir_index;
683 w->line_number_dir_index ++;
684 copy = g_strdup (dir);
685 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
686 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
687 } else {
688 dir_index --;
689 }
690
691 g_free (dir);
692 }
693 }
694
695 /* Line number info header */
696 emit_section_change (w, ".debug_line", 0);
697 emit_label (w, ".Ldebug_line_section_start");
698 emit_label (w, ".Ldebug_line_start");
699 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
700 emit_int16 (w, 0x2); /* version */
701 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
702 emit_byte (w, 1); /* minimum_instruction_length */
703 emit_byte (w, 1); /* default_is_stmt */
704 emit_byte (w, LINE_BASE); /* line_base */
705 emit_byte (w, LINE_RANGE); /* line_range */
706 emit_byte (w, OPCODE_BASE); /* opcode_base */
707 emit_byte (w, 0); /* standard_opcode_lengths */
708 emit_byte (w, 1);
709 emit_byte (w, 1);
710 emit_byte (w, 1);
711 emit_byte (w, 1);
712 emit_byte (w, 0);
713 emit_byte (w, 0);
714 emit_byte (w, 0);
715 emit_byte (w, 1);
716 emit_byte (w, 0);
717 emit_byte (w, 0);
718 emit_byte (w, 1);
719
720 /* Includes */
721 emit_section_change (w, ".debug_line", 0);
722 for (i = 0; i < w->line_number_dir_index; ++i) {
723 char *dir = (char *)g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
724
725 emit_string (w, mono_dwarf_escape_path (dir));
726 }
727 /* End of Includes */
728 emit_byte (w, 0);
729
730 /* Files */
731 for (i = 0; i < w->line_number_file_index; ++i) {
732 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
733 char *basename = NULL, *dir;
734 int dir_index = 0;
735
736 if (g_path_is_absolute (name)) {
737 dir = g_path_get_dirname (name);
738
739 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
740 basename = g_path_get_basename (name);
741 }
742
743 if (basename)
744 emit_string (w, basename);
745 else
746 emit_string (w, mono_dwarf_escape_path (name));
747 emit_uleb128 (w, dir_index);
748 emit_byte (w, 0);
749 emit_byte (w, 0);
750 }
751
752 /* End of Files */
753 emit_byte (w, 0);
754
755 emit_label (w, ".Ldebug_line_header_end");
756
757 /* Emit line number table */
758 for (l = info_list; l; l = l->next) {
759 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
760 MonoDebugMethodJitInfo *dmji;
761
762 dmji = mono_debug_find_method (info->method, mono_domain_get ());
763 if (!dmji)
764 continue;
765 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
766 mono_debug_free_method_jit_info (dmji);
767 }
768 g_slist_free (info_list);
769
770 emit_byte (w, 0);
771 emit_byte (w, 1);
772 emit_byte (w, DW_LNE_end_sequence);
773
774 emit_label (w, ".Ldebug_line_end");
775 }
776
777 /*
778 * Some assemblers like apple's do not support subsections, so we can't place
779 * .Ldebug_info_end at the end of the section using subsections. Instead, we
780 * define it every time something gets added to the .debug_info section.
781 * The apple assember seems to use the last definition.
782 */
783 static void
784 emit_debug_info_end (MonoDwarfWriter *w)
785 {
786 /* This doesn't seem to work/required with recent iphone sdk versions */
787 #if 0
788 if (!mono_img_writer_subsections_supported (w->w))
789 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
790 #endif
791 }
792
793 void
794 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
795 {
796 char *s, *build_info;
797 int i;
798
799 if (!w->emit_line) {
800 emit_section_change (w, ".debug_line", 0);
801 emit_label (w, ".Ldebug_line_section_start");
802 emit_label (w, ".Ldebug_line_start");
803 }
804
805 w->cie_program = base_unwind_program;
806
807 emit_section_change (w, ".debug_abbrev", 0);
808 emit_label (w, ".Ldebug_abbrev_start");
809 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
810 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
811 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
812 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
813 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
814 param_attr, G_N_ELEMENTS (param_attr));
815 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
816 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
817 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
818 base_type_attr, G_N_ELEMENTS (base_type_attr));
819 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
820 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
821 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
822 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
823 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
824 data_member_attr, G_N_ELEMENTS (data_member_attr));
825 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
826 typedef_attr, G_N_ELEMENTS (typedef_attr));
827 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
828 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
829 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
830 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
831 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
832 namespace_attr, G_N_ELEMENTS (namespace_attr));
833 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
834 variable_attr, G_N_ELEMENTS (variable_attr));
835 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
836 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
837 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
838 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
839 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
840 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
841 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
842 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
843 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
844 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
845 emit_byte (w, 0);
846
847 emit_section_change (w, ".debug_info", 0);
848 emit_label (w, ".Ldebug_info_start");
849 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
850 emit_label (w, ".Ldebug_info_begin");
851 emit_int16 (w, 0x2); /* DWARF version 2 */
852 #if !defined(TARGET_MACH)
853 emit_symbol (w, ".Ldebug_abbrev_start"); /* .debug_abbrev offset */
854 #else
855 emit_int32 (w, 0); /* .debug_abbrev offset */
856 #endif
857 emit_byte (w, sizeof (target_mgreg_t)); /* address size */
858
859 /* Compilation unit */
860 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
861 build_info = mono_get_runtime_build_info ();
862 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
863 emit_string (w, s);
864 g_free (build_info);
865 g_free (s);
866 emit_string (w, cu_name);
867 emit_string (w, "");
868 emit_byte (w, DW_LANG_C);
869 emit_pointer_value (w, 0);
870 emit_pointer_value (w, 0);
871 /* offset into .debug_line section */
872 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
873
874 /* Base types */
875 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
876 emit_label (w, basic_types [i].die_name);
877 emit_uleb128 (w, ABBREV_BASE_TYPE);
878 emit_byte (w, basic_types [i].size);
879 emit_byte (w, basic_types [i].encoding);
880 emit_string (w, basic_types [i].name);
881 }
882
883 emit_debug_info_end (w);
884
885 /* debug_loc section */
886 emit_section_change (w, ".debug_loc", 0);
887 emit_label (w, ".Ldebug_loc_start");
888
889 emit_cie (w);
890 }
891
892 /*
893 * mono_dwarf_writer_close:
894 *
895 * Finalize the emitted debugging info.
896 */
897 void
898 mono_dwarf_writer_close (MonoDwarfWriter *w)
899 {
900 emit_section_change (w, ".debug_info", 0);
901 emit_byte (w, 0); /* close COMPILE_UNIT */
902 emit_label (w, ".Ldebug_info_end");
903
904 if (w->emit_line)
905 emit_all_line_number_info (w);
906 }
907
908 static void emit_type (MonoDwarfWriter *w, MonoType *t);
909 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
910
911 static const char*
912 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
913 {
914 GHashTable *cache;
915
916 if (vtype)
917 cache = w->class_to_vtype_die;
918 else
919 cache = w->class_to_die;
920
921 return (const char *)g_hash_table_lookup (cache, klass);
922 }
923
924 /* Returns the local symbol pointing to the emitted debug info */
925 static char*
926 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
927 {
928 char *die, *pointer_die, *reference_die;
929 char *full_name, *p;
930 gpointer iter;
931 MonoClassField *field;
932 const char *fdie;
933 int k;
934 gboolean emit_namespace = FALSE, has_children;
935 GHashTable *cache;
936
937 if (vtype)
938 cache = w->class_to_vtype_die;
939 else
940 cache = w->class_to_die;
941
942 die = (char *)g_hash_table_lookup (cache, klass);
943 if (die)
944 return die;
945
946 if (!((m_class_get_byval_arg (klass)->type == MONO_TYPE_CLASS) || (m_class_get_byval_arg (klass)->type == MONO_TYPE_OBJECT) || m_class_get_byval_arg (klass)->type == MONO_TYPE_GENERICINST || m_class_is_enumtype (klass) || (m_class_get_byval_arg (klass)->type == MONO_TYPE_VALUETYPE && vtype) ||
947 (m_class_get_byval_arg (klass)->type >= MONO_TYPE_BOOLEAN && m_class_get_byval_arg (klass)->type <= MONO_TYPE_R8 && !vtype)))
948 return NULL;
949
950 /*
951 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
952 */
953 /*
954 if (klass->name_space && klass->name_space [0] != '\0')
955 emit_namespace = TRUE;
956 */
957 if (emit_namespace) {
958 emit_uleb128 (w, ABBREV_NAMESPACE);
959 emit_string (w, m_class_get_name_space (klass));
960 }
961
962 full_name = g_strdup_printf ("%s%s%s", m_class_get_name_space (klass), m_class_get_name_space (klass) ? "." : "", m_class_get_name (klass));
963 /*
964 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
965 * to separate components.
966 */
967 for (p = full_name; *p; p ++)
968 if (*p == '.')
969 *p = '_';
970
971 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
972 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
973 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
974 w->tdie_index ++;
975
976 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
977 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
978 g_hash_table_insert (cache, klass, die);
979
980 if (m_class_is_enumtype (klass)) {
981 int size = mono_class_value_size (mono_class_from_mono_type_internal (mono_class_enum_basetype_internal (klass)), NULL);
982
983 emit_label (w, die);
984
985 emit_uleb128 (w, ABBREV_ENUM_TYPE);
986 emit_string (w, full_name);
987 emit_uleb128 (w, size);
988 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
989 if (basic_types [k].type == mono_class_enum_basetype_internal (klass)->type)
990 break;
991 g_assert (k < G_N_ELEMENTS (basic_types));
992 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
993
994 /* Emit enum values */
995 iter = NULL;
996 while ((field = mono_class_get_fields_internal (klass, &iter))) {
997 const char *p;
998 MonoTypeEnum def_type;
999
1000 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC))
1001 continue;
1002 if (mono_field_is_deleted (field))
1003 continue;
1004
1005 emit_uleb128 (w, ABBREV_ENUMERATOR);
1006 emit_string (w, mono_field_get_name (field));
1007
1008 p = mono_class_get_field_default_value (field, &def_type);
1009 /* len = */ mono_metadata_decode_blob_size (p, &p);
1010 switch (mono_class_enum_basetype_internal (klass)->type) {
1011 case MONO_TYPE_U1:
1012 case MONO_TYPE_I1:
1013 case MONO_TYPE_BOOLEAN:
1014 emit_sleb128 (w, *p);
1015 break;
1016 case MONO_TYPE_U2:
1017 case MONO_TYPE_I2:
1018 case MONO_TYPE_CHAR:
1019 emit_sleb128 (w, read16 (p));
1020 break;
1021 case MONO_TYPE_U4:
1022 case MONO_TYPE_I4:
1023 emit_sleb128 (w, read32 (p));
1024 break;
1025 case MONO_TYPE_U8:
1026 case MONO_TYPE_I8:
1027 emit_sleb128 (w, read64 (p));
1028 break;
1029 case MONO_TYPE_I:
1030 case MONO_TYPE_U:
1031 #if TARGET_SIZEOF_VOID_P == 8
1032 emit_sleb128 (w, read64 (p));
1033 #else
1034 emit_sleb128 (w, read32 (p));
1035 #endif
1036 break;
1037 default:
1038 g_assert_not_reached ();
1039 }
1040 }
1041
1042 has_children = TRUE;
1043 } else {
1044 guint8 buf [128];
1045 guint8 *p;
1046 char *parent_die;
1047
1048 if (m_class_get_parent (klass))
1049 parent_die = emit_class_dwarf_info (w, m_class_get_parent (klass), FALSE);
1050 else
1051 parent_die = NULL;
1052
1053 /* Emit field types */
1054 iter = NULL;
1055 while ((field = mono_class_get_fields_internal (klass, &iter))) {
1056 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1057 continue;
1058
1059 emit_type (w, field->type);
1060 }
1061
1062 iter = NULL;
1063 has_children = parent_die || mono_class_get_fields_internal (klass, &iter);
1064
1065 emit_label (w, die);
1066
1067 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1068 emit_string (w, full_name);
1069 emit_uleb128 (w, m_class_get_instance_size (klass));
1070
1071 if (parent_die) {
1072 emit_uleb128 (w, ABBREV_INHERITANCE);
1073 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1074
1075 p = buf;
1076 *p ++= DW_OP_plus_uconst;
1077 encode_uleb128 (0, p, &p);
1078 emit_byte (w, p - buf);
1079 emit_bytes (w, buf, p - buf);
1080 }
1081
1082 /* Emit fields */
1083 iter = NULL;
1084 while ((field = mono_class_get_fields_internal (klass, &iter))) {
1085 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1086 continue;
1087
1088 fdie = get_type_die (w, field->type);
1089 if (fdie) {
1090 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1091 emit_string (w, field->name);
1092 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1093 /* location */
1094 p = buf;
1095 *p ++= DW_OP_plus_uconst;
1096 if (m_class_is_valuetype (klass) && vtype)
1097 encode_uleb128 (field->offset - MONO_ABI_SIZEOF (MonoObject), p, &p);
1098 else
1099 encode_uleb128 (field->offset, p, &p);
1100
1101 emit_byte (w, p - buf);
1102 emit_bytes (w, buf, p - buf);
1103 }
1104 }
1105 }
1106
1107 /* Type end */
1108 if (has_children)
1109 emit_uleb128 (w, 0x0);
1110
1111 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1112 emit_uleb128 (w, ABBREV_TYPEDEF);
1113 emit_string (w, full_name);
1114 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1115
1116 /* Add a pointer type */
1117 emit_label (w, pointer_die);
1118
1119 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1120 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1121
1122 /* Add a reference type */
1123 emit_label (w, reference_die);
1124
1125 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1126 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1127
1128 g_free (full_name);
1129
1130 if (emit_namespace) {
1131 /* Namespace end */
1132 emit_uleb128 (w, 0x0);
1133 }
1134
1135 return die;
1136 }
1137
1138 static gboolean base_types_emitted [64];
1139
1140 static const char*
1141 get_type_die (MonoDwarfWriter *w, MonoType *t)
1142 {
1143 MonoClass *klass = mono_class_from_mono_type_internal (t);
1144 int j;
1145 const char *tdie;
1146
1147 if (t->byref) {
1148 if (t->type == MONO_TYPE_VALUETYPE) {
1149 tdie = (const char *)g_hash_table_lookup (w->class_to_pointer_die, klass);
1150 }
1151 else {
1152 tdie = get_class_die (w, klass, FALSE);
1153 /* Should return a pointer type to a reference */
1154 }
1155 // FIXME:
1156 t = mono_get_int_type ();
1157 }
1158 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1159 if (basic_types [j].type == t->type)
1160 break;
1161 if (j < G_N_ELEMENTS (basic_types)) {
1162 tdie = basic_types [j].die_name;
1163 } else {
1164 switch (t->type) {
1165 case MONO_TYPE_CLASS:
1166 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1167 //tdie = ".LDIE_OBJECT";
1168 break;
1169 case MONO_TYPE_ARRAY:
1170 tdie = ".LDIE_OBJECT";
1171 break;
1172 case MONO_TYPE_VALUETYPE:
1173 if (m_class_is_enumtype (klass))
1174 tdie = get_class_die (w, klass, FALSE);
1175 else
1176 tdie = ".LDIE_I4";
1177 break;
1178 case MONO_TYPE_GENERICINST:
1179 if (!MONO_TYPE_ISSTRUCT (t)) {
1180 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1181 } else {
1182 tdie = ".LDIE_I4";
1183 }
1184 break;
1185 case MONO_TYPE_PTR:
1186 tdie = ".LDIE_I";
1187 break;
1188 default:
1189 tdie = ".LDIE_I4";
1190 break;
1191 }
1192 }
1193
1194 g_assert (tdie);
1195
1196 return tdie;
1197 }
1198
1199 static void
1200 emit_type (MonoDwarfWriter *w, MonoType *t)
1201 {
1202 MonoClass *klass = mono_class_from_mono_type_internal (t);
1203 int j;
1204 const char *tdie;
1205
1206 if (t->byref) {
1207 if (t->type == MONO_TYPE_VALUETYPE) {
1208 tdie = emit_class_dwarf_info (w, klass, TRUE);
1209 if (tdie)
1210 return;
1211 }
1212 else {
1213 emit_class_dwarf_info (w, klass, FALSE);
1214 }
1215 // FIXME:
1216 t = mono_get_int_type ();
1217 }
1218 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1219 if (basic_types [j].type == t->type)
1220 break;
1221 if (j < G_N_ELEMENTS (basic_types)) {
1222 /* Emit a boxed version of base types */
1223 if (j < 64 && !base_types_emitted [j]) {
1224 emit_class_dwarf_info (w, klass, FALSE);
1225 base_types_emitted [j] = TRUE;
1226 }
1227 } else {
1228 switch (t->type) {
1229 case MONO_TYPE_CLASS:
1230 emit_class_dwarf_info (w, klass, FALSE);
1231 break;
1232 case MONO_TYPE_ARRAY:
1233 break;
1234 case MONO_TYPE_VALUETYPE:
1235 if (m_class_is_enumtype (klass))
1236 emit_class_dwarf_info (w, klass, FALSE);
1237 break;
1238 case MONO_TYPE_GENERICINST:
1239 if (!MONO_TYPE_ISSTRUCT (t))
1240 emit_class_dwarf_info (w, klass, FALSE);
1241 break;
1242 case MONO_TYPE_PTR:
1243 break;
1244 default:
1245 break;
1246 }
1247 }
1248 }
1249
1250 static void
1251 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1252 {
1253 const char *tdie;
1254
1255 tdie = get_type_die (w, t);
1256
1257 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1258 }
1259
1260 static void
1261 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1262 {
1263 /* location */
1264 /* FIXME: This needs a location list, since the args can go from reg->stack */
1265 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1266 /* gdb treats this as optimized out */
1267 } else if (ins->opcode == OP_REGVAR) {
1268 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1269 p ++;
1270 } else if (ins->opcode == OP_REGOFFSET) {
1271 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1272 encode_sleb128 (ins->inst_offset, p, &p);
1273 } else {
1274 // FIXME:
1275 *p ++ = DW_OP_reg0;
1276 }
1277
1278 *endp = p;
1279 }
1280
1281 static void
1282 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1283 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1284 guint8 *expr, guint32 expr_len)
1285 {
1286 char label [128];
1287
1288 emit_push_section (w, ".debug_loc", 0);
1289 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1290 emit_label (w, label);
1291
1292 emit_pointer_value (w, loclist_begin_addr);
1293 emit_pointer_value (w, loclist_end_addr);
1294 emit_byte (w, expr_len % 256);
1295 emit_byte (w, expr_len / 256);
1296 emit_bytes (w, expr, expr_len);
1297
1298 emit_pointer_value (w, NULL);
1299 emit_pointer_value (w, NULL);
1300
1301 emit_pop_section (w);
1302 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1303 }
1304
1305 /*
1306 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1307 * it is a public header.
1308 */
1309 static const guint8 *token_handler_ip;
1310
1311 static char*
1312 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1313 {
1314 ERROR_DECL (error);
1315 char *res, *desc;
1316 MonoMethod *cmethod;
1317 MonoClass *klass;
1318 MonoClassField *field;
1319 gpointer data = NULL;
1320
1321 if (method->wrapper_type)
1322 data = mono_method_get_wrapper_data (method, token);
1323
1324 switch (*token_handler_ip) {
1325 case CEE_ISINST:
1326 case CEE_CASTCLASS:
1327 case CEE_LDELEMA:
1328 if (method->wrapper_type) {
1329 klass = (MonoClass *)data;
1330 } else {
1331 klass = mono_class_get_checked (m_class_get_image (method->klass), token, error);
1332 g_assert (is_ok (error)); /* FIXME error handling */
1333 }
1334 res = g_strdup_printf ("<%s>", m_class_get_name (klass));
1335 break;
1336 case CEE_NEWOBJ:
1337 case CEE_CALL:
1338 case CEE_CALLVIRT:
1339 if (method->wrapper_type) {
1340 cmethod = (MonoMethod *)data;
1341 } else {
1342 ERROR_DECL (error);
1343 cmethod = mono_get_method_checked (m_class_get_image (method->klass), token, NULL, NULL, error);
1344 if (!cmethod)
1345 g_error ("Could not load method due to %s", mono_error_get_message (error)); /* FIXME don't swallow the error */
1346 }
1347 desc = mono_method_full_name (cmethod, TRUE);
1348 res = g_strdup_printf ("<%s>", desc);
1349 g_free (desc);
1350 break;
1351 case CEE_CALLI:
1352 if (method->wrapper_type) {
1353 desc = mono_signature_get_desc ((MonoMethodSignature *)data, FALSE);
1354 res = g_strdup_printf ("<%s>", desc);
1355 g_free (desc);
1356 } else {
1357 res = g_strdup_printf ("<0x%08x>", token);
1358 }
1359 break;
1360 case CEE_LDFLD:
1361 case CEE_LDSFLD:
1362 case CEE_STFLD:
1363 case CEE_STSFLD:
1364 if (method->wrapper_type) {
1365 field = (MonoClassField *)data;
1366 } else {
1367 field = mono_field_from_token_checked (m_class_get_image (method->klass), token, &klass, NULL, error);
1368 g_assert (is_ok (error)); /* FIXME error handling */
1369 }
1370 desc = mono_field_full_name (field);
1371 res = g_strdup_printf ("<%s>", desc);
1372 g_free (desc);
1373 break;
1374 default:
1375 res = g_strdup_printf ("<0x%08x>", token);
1376 break;
1377 }
1378
1379 return res;
1380 }
1381
1382 /*
1383 * disasm_ins:
1384 *
1385 * Produce a disassembled form of the IL instruction at IP. This is an extension
1386 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1387 * CEE_MONO_ opcodes.
1388 */
1389 static char*
1390 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1391 {
1392 ERROR_DECL (error);
1393 char *dis;
1394 MonoDisHelper dh;
1395 MonoMethodHeader *header = mono_method_get_header_checked (method, error);
1396 mono_error_assert_ok (error); /* FIXME don't swallow the error */
1397
1398 memset (&dh, 0, sizeof (dh));
1399 dh.newline = "";
1400 dh.label_format = "IL_%04x: ";
1401 dh.label_target = "IL_%04x";
1402 dh.tokener = token_handler;
1403
1404 token_handler_ip = ip;
1405 if (*ip == MONO_CUSTOM_PREFIX) {
1406 guint32 token;
1407 gpointer data;
1408
1409 switch (ip [1]) {
1410 case CEE_MONO_ICALL: {
1411 MonoJitICallInfo const * const info = mono_find_jit_icall_info ((MonoJitICallId)read32 (ip + 2));
1412 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1413 ip += 6;
1414 break;
1415 }
1416 case CEE_MONO_CLASSCONST: {
1417 token = read32 (ip + 2);
1418 data = mono_method_get_wrapper_data (method, token);
1419
1420 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), m_class_get_name ((MonoClass*)data));
1421 ip += 6;
1422 break;
1423 }
1424 default:
1425 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1426 }
1427 } else {
1428 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1429 }
1430 token_handler_ip = NULL;
1431
1432 *endip = ip;
1433 mono_metadata_free_mh (header);
1434 return dis;
1435 }
1436
1437 static gint32
1438 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1439 guint32 native_offset)
1440 {
1441 int i;
1442
1443 if (!jit->line_numbers)
1444 return -1;
1445
1446 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1447 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1448
1449 if (lne.native_offset <= native_offset)
1450 return lne.il_offset;
1451 }
1452
1453 return -1;
1454 }
1455
1456 static int max_special_addr_diff = 0;
1457
1458 static void
1459 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1460 {
1461 gint64 opcode = 0;
1462
1463 /* Use a special opcode if possible */
1464 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1465 if (max_special_addr_diff == 0)
1466 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1467
1468 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1469 emit_byte (w, DW_LNS_const_add_pc);
1470 addr_diff -= max_special_addr_diff;
1471 }
1472
1473 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1474 if (opcode > 255)
1475 opcode = 0;
1476 }
1477
1478 if (opcode != 0) {
1479 emit_byte (w, opcode);
1480 } else {
1481 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1482 emit_byte (w, DW_LNS_advance_line);
1483 emit_sleb128 (w, line_diff);
1484 emit_byte (w, DW_LNS_advance_pc);
1485 emit_sleb128 (w, addr_diff);
1486 emit_byte (w, DW_LNS_copy);
1487 }
1488 }
1489
1490 static gint
1491 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1492 {
1493 if (a->native_offset == b->native_offset)
1494 return a->il_offset - b->il_offset;
1495 else
1496 return a->native_offset - b->native_offset;
1497 }
1498
1499 static void
1500 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1501 char *start_symbol, char *end_symbol,
1502 guint8 *code, guint32 code_size,
1503 MonoDebugMethodJitInfo *debug_info)
1504 {
1505 ERROR_DECL (error);
1506 guint32 prev_line = 0;
1507 guint32 prev_native_offset = 0;
1508 int i, file_index, il_offset, prev_il_offset;
1509 gboolean first = TRUE;
1510 MonoDebugSourceLocation *loc;
1511 char *prev_file_name = NULL;
1512 MonoMethodHeader *header = mono_method_get_header_checked (method, error);
1513 MonoDebugMethodInfo *minfo;
1514 MonoDebugLineNumberEntry *ln_array;
1515 int *native_to_il_offset = NULL;
1516
1517 mono_error_assert_ok (error); /* FIXME don't swallow the error */
1518
1519 if (!w->emit_line) {
1520 mono_metadata_free_mh (header);
1521 return;
1522 }
1523
1524 minfo = mono_debug_lookup_method (method);
1525
1526 /* Compute the native->IL offset mapping */
1527
1528 g_assert (code_size);
1529
1530 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1531 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1532
1533 mono_qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (int (*)(const void *, const void *))compare_lne);
1534
1535 native_to_il_offset = g_new0 (int, code_size + 1);
1536
1537 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1538 int j;
1539 MonoDebugLineNumberEntry *lne = &ln_array [i];
1540
1541 if (i == 0) {
1542 for (j = 0; j < lne->native_offset; ++j)
1543 native_to_il_offset [j] = -1;
1544 }
1545
1546 if (i < debug_info->num_line_numbers - 1) {
1547 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1548
1549 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1550 native_to_il_offset [j] = lne->il_offset;
1551 } else {
1552 for (j = lne->native_offset; j < code_size; ++j)
1553 native_to_il_offset [j] = lne->il_offset;
1554 }
1555 }
1556 g_free (ln_array);
1557
1558 prev_line = 1;
1559 prev_il_offset = -1;
1560
1561 w->cur_file_index = -1;
1562 for (i = 0; i < code_size; ++i) {
1563 int line_diff, addr_diff;
1564
1565 if (!minfo)
1566 continue;
1567
1568 if (!debug_info->line_numbers)
1569 continue;
1570
1571 if (native_to_il_offset)
1572 il_offset = native_to_il_offset [i];
1573 else
1574 il_offset = il_offset_from_address (method, debug_info, i);
1575 /*
1576 il_offset = il_offset_from_address (method, debug_info, i);
1577
1578 g_assert (il_offset == native_to_il_offset [i]);
1579 */
1580
1581 il_offset = native_to_il_offset [i];
1582 if (il_offset < 0)
1583 continue;
1584
1585 if (il_offset == prev_il_offset)
1586 continue;
1587
1588 prev_il_offset = il_offset;
1589
1590 loc = mono_debug_method_lookup_location (minfo, il_offset);
1591 if (!loc)
1592 continue;
1593 if (!loc->source_file) {
1594 mono_debug_free_source_location (loc);
1595 continue;
1596 }
1597
1598 line_diff = (gint32)loc->row - (gint32)prev_line;
1599 addr_diff = i - prev_native_offset;
1600
1601 if (first) {
1602 emit_section_change (w, ".debug_line", 0);
1603
1604 emit_byte (w, 0);
1605 emit_byte (w, sizeof (target_mgreg_t) + 1);
1606 emit_byte (w, DW_LNE_set_address);
1607 if (start_symbol)
1608 emit_pointer_unaligned (w, start_symbol);
1609 else
1610 emit_pointer_value (w, code);
1611 first = FALSE;
1612 }
1613
1614 if (loc->row != prev_line) {
1615 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1616 /* Add an entry to the file table */
1617 /* FIXME: Avoid duplicates */
1618 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1619 g_free (prev_file_name);
1620 prev_file_name = g_strdup (loc->source_file);
1621
1622 if (w->cur_file_index != file_index) {
1623 emit_byte (w, DW_LNS_set_file);
1624 emit_uleb128 (w, file_index);
1625 emit_byte (w, DW_LNS_copy);
1626 w->cur_file_index = file_index;
1627 }
1628 }
1629 }
1630
1631 if (loc->row != prev_line) {
1632 if (prev_native_offset == 0)
1633 emit_byte (w, DW_LNE_set_prologue_end);
1634
1635 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1636 emit_advance_op (w, line_diff, addr_diff);
1637
1638 prev_line = loc->row;
1639 prev_native_offset = i;
1640 }
1641
1642 mono_debug_free_source_location (loc);
1643 first = FALSE;
1644 }
1645
1646 g_free (native_to_il_offset);
1647 g_free (prev_file_name);
1648
1649 if (!first) {
1650 emit_byte (w, DW_LNS_advance_pc);
1651 emit_sleb128 (w, code_size - prev_native_offset);
1652 emit_byte (w, DW_LNS_copy);
1653
1654 emit_byte (w, 0);
1655 emit_byte (w, 1);
1656 emit_byte (w, DW_LNE_end_sequence);
1657 } else if (!start_symbol) {
1658 /* No debug info, XDEBUG mode */
1659 char *name, *dis;
1660 const guint8 *ip = header->code;
1661 int prev_line, prev_native_offset;
1662 int *il_to_line;
1663
1664 /*
1665 * Emit the IL code into a temporary file and emit line number info
1666 * referencing that file.
1667 */
1668
1669 name = mono_method_full_name (method, TRUE);
1670 fprintf (w->il_file, "// %s\n", name);
1671 w->il_file_line_index ++;
1672 g_free (name);
1673
1674 il_to_line = g_new0 (int, header->code_size);
1675
1676 emit_section_change (w, ".debug_line", 0);
1677 emit_byte (w, 0);
1678 emit_byte (w, sizeof (target_mgreg_t) + 1);
1679 emit_byte (w, DW_LNE_set_address);
1680 emit_pointer_value (w, code);
1681
1682 // FIXME: Optimize this
1683 while (ip < header->code + header->code_size) {
1684 int il_offset = ip - header->code;
1685
1686 /* Emit IL */
1687 w->il_file_line_index ++;
1688
1689 dis = disasm_ins (method, ip, &ip);
1690 fprintf (w->il_file, "%s\n", dis);
1691 g_free (dis);
1692
1693 il_to_line [il_offset] = w->il_file_line_index;
1694 }
1695
1696 /* Emit line number info */
1697 prev_line = 1;
1698 prev_native_offset = 0;
1699 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1700 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1701 int line;
1702
1703 if (lne->il_offset >= header->code_size)
1704 continue;
1705 line = il_to_line [lne->il_offset];
1706 if (!line) {
1707 /*
1708 * This seems to happen randomly, it looks like il_offset points
1709 * into the middle of an instruction.
1710 */
1711 continue;
1712 /*
1713 printf ("%s\n", mono_method_full_name (method, TRUE));
1714 printf ("%d %d\n", lne->il_offset, header->code_size);
1715 g_assert (line);
1716 */
1717 }
1718
1719 if (line - prev_line != 0) {
1720 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1721
1722 prev_line = line;
1723 prev_native_offset = lne->native_offset;
1724 }
1725 }
1726
1727 emit_byte (w, DW_LNS_advance_pc);
1728 emit_sleb128 (w, code_size - prev_native_offset);
1729 emit_byte (w, DW_LNS_copy);
1730
1731 emit_byte (w, 0);
1732 emit_byte (w, 1);
1733 emit_byte (w, DW_LNE_end_sequence);
1734
1735 fflush (w->il_file);
1736 g_free (il_to_line);
1737 }
1738 mono_metadata_free_mh (header);
1739 }
1740
1741 static MonoMethodVar*
1742 find_vmv (MonoCompile *cfg, MonoInst *ins)
1743 {
1744 int j;
1745
1746 if (cfg->varinfo) {
1747 for (j = 0; j < cfg->num_varinfo; ++j) {
1748 if (cfg->varinfo [j] == ins)
1749 break;
1750 }
1751
1752 if (j < cfg->num_varinfo) {
1753 return MONO_VARINFO (cfg, j);
1754 }
1755 }
1756
1757 return NULL;
1758 }
1759
1760 void
1761 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1762 guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1763 {
1764 ERROR_DECL (error);
1765 char *name;
1766 MonoMethodSignature *sig;
1767 MonoMethodHeader *header;
1768 char **names;
1769 MonoDebugLocalsInfo *locals_info;
1770 MonoDebugMethodInfo *minfo;
1771 MonoDebugSourceLocation *loc = NULL;
1772 int i;
1773 guint8 buf [128];
1774 guint8 *p;
1775
1776 emit_section_change (w, ".debug_info", 0);
1777
1778 sig = mono_method_signature_internal (method);
1779 header = mono_method_get_header_checked (method, error);
1780 mono_error_assert_ok (error); /* FIXME don't swallow the error */
1781
1782 /* Parameter types */
1783 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1784 MonoType *t;
1785
1786 if (i == 0 && sig->hasthis) {
1787 if (m_class_is_valuetype (method->klass))
1788 t = m_class_get_this_arg (method->klass);
1789 else
1790 t = m_class_get_byval_arg (method->klass);
1791 } else {
1792 t = sig->params [i - sig->hasthis];
1793 }
1794
1795 emit_type (w, t);
1796 }
1797 //emit_type (w, mono_get_int32_type ());
1798
1799 /* Local types */
1800 for (i = 0; i < header->num_locals; ++i) {
1801 emit_type (w, header->locals [i]);
1802 }
1803
1804 minfo = mono_debug_lookup_method (method);
1805 if (minfo)
1806 loc = mono_debug_method_lookup_location (minfo, 0);
1807
1808 /* Subprogram */
1809 names = g_new0 (char *, sig->param_count);
1810 mono_method_get_param_names (method, (const char **) names);
1811
1812 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1813 /* DW_AT_name */
1814 name = mono_method_full_name (method, FALSE);
1815 emit_escaped_string (w, name);
1816 /* DW_AT_MIPS_linkage_name */
1817 if (linkage_name)
1818 emit_string (w, linkage_name);
1819 else
1820 emit_string (w, "");
1821 /* DW_AT_decl_file/DW_AT_decl_line */
1822 if (loc) {
1823 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1824 emit_uleb128 (w, file_index + 1);
1825 emit_uleb128 (w, loc->row);
1826
1827 mono_debug_free_source_location (loc);
1828 loc = NULL;
1829 } else {
1830 emit_uleb128 (w, 0);
1831 emit_uleb128 (w, 0);
1832 }
1833 #ifndef TARGET_IOS
1834 emit_string (w, name);
1835 #endif
1836 g_free (name);
1837 if (start_symbol) {
1838 emit_pointer_unaligned (w, start_symbol);
1839 emit_pointer_unaligned (w, end_symbol);
1840 } else {
1841 emit_pointer_value (w, code);
1842 emit_pointer_value (w, code + code_size);
1843 }
1844 /* frame_base */
1845 emit_byte (w, 2);
1846 emit_byte (w, DW_OP_breg6);
1847 emit_byte (w, 16);
1848
1849 /* Parameters */
1850 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1851 MonoInst *arg = args ? args [i] : NULL;
1852 MonoType *t;
1853 const char *pname;
1854 char pname_buf [128];
1855 MonoMethodVar *vmv = NULL;
1856 gboolean need_loclist = FALSE;
1857
1858 vmv = find_vmv (cfg, arg);
1859 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1860 need_loclist = TRUE;
1861
1862 if (i == 0 && sig->hasthis) {
1863 if (m_class_is_valuetype (method->klass))
1864 t = m_class_get_this_arg (method->klass);
1865 else
1866 t = m_class_get_byval_arg (method->klass);
1867 pname = "this";
1868 } else {
1869 t = sig->params [i - sig->hasthis];
1870 pname = names [i - sig->hasthis];
1871 }
1872
1873 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1874 /* name */
1875 if (pname[0] == '\0') {
1876 sprintf (pname_buf, "param%d", i - sig->hasthis);
1877 pname = pname_buf;
1878 }
1879 emit_string (w, pname);
1880 /* type */
1881 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1882 emit_var_type (w, mono_get_int32_type ());
1883 else
1884 emit_var_type (w, t);
1885
1886 p = buf;
1887 encode_var_location (w, arg, p, &p);
1888 if (need_loclist) {
1889 vmv->live_range_start = 0;
1890 if (vmv->live_range_end == 0)
1891 /* FIXME: Uses made in calls are not recorded */
1892 vmv->live_range_end = code_size;
1893 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1894 } else {
1895 emit_byte (w, p - buf);
1896 emit_bytes (w, buf, p - buf);
1897 }
1898 }
1899 g_free (names);
1900
1901 /* Locals */
1902 locals_info = mono_debug_lookup_locals (method);
1903
1904 for (i = 0; i < header->num_locals; ++i) {
1905 MonoInst *ins = locals [i];
1906 char name_buf [128];
1907 int j;
1908 MonoMethodVar *vmv = NULL;
1909 gboolean need_loclist = FALSE;
1910 char *lname;
1911
1912 /* ins->dreg no longer contains the original vreg */
1913 vmv = find_vmv (cfg, ins);
1914 if (code && vmv) {
1915 if (vmv->live_range_start) {
1916 /* This variable has a precise live range */
1917 need_loclist = TRUE;
1918 }
1919 }
1920
1921 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1922 /* name */
1923 lname = NULL;
1924 if (locals_info) {
1925 for (j = 0; j < locals_info->num_locals; ++j)
1926 if (locals_info->locals [j].index == i)
1927 break;
1928 if (j < locals_info->num_locals)
1929 lname = locals_info->locals [j].name;
1930 }
1931 if (lname) {
1932 emit_string (w, lname);
1933 } else {
1934 sprintf (name_buf, "V_%d", i);
1935 emit_string (w, name_buf);
1936 }
1937 /* type */
1938 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1939 emit_var_type (w, mono_get_int32_type ());
1940 else
1941 emit_var_type (w, header->locals [i]);
1942
1943 p = buf;
1944 encode_var_location (w, ins, p, &p);
1945
1946 if (need_loclist) {
1947 if (vmv->live_range_end == 0)
1948 /* FIXME: Uses made in calls are not recorded */
1949 vmv->live_range_end = code_size;
1950 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1951 } else {
1952 emit_byte (w, p - buf);
1953 emit_bytes (w, buf, p - buf);
1954 }
1955 }
1956
1957 if (locals_info)
1958 mono_debug_free_locals (locals_info);
1959
1960 /* Subprogram end */
1961 emit_uleb128 (w, 0x0);
1962
1963 emit_line (w);
1964
1965 emit_debug_info_end (w);
1966
1967 /* Emit unwind info */
1968 if (unwind_info) {
1969 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1970 w->fde_index ++;
1971 }
1972
1973 /* Save the information needed to emit the line number info later at once */
1974 /* != could happen when using --regression */
1975 if (debug_info && (debug_info->code_start == code)) {
1976 MethodLineNumberInfo *info;
1977
1978 info = g_new0 (MethodLineNumberInfo, 1);
1979 info->method = method;
1980 info->start_symbol = g_strdup (start_symbol);
1981 info->end_symbol = g_strdup (end_symbol);
1982 info->code = code;
1983 info->code_size = code_size;
1984 w->line_info = g_slist_prepend (w->line_info, info);
1985 }
1986
1987 emit_line (w);
1988 mono_metadata_free_mh (header);
1989 }
1990
1991 void
1992 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)
1993 {
1994 emit_section_change (w, ".debug_info", 0);
1995
1996 /* Subprogram */
1997 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
1998 emit_string (w, tramp_name);
1999 emit_pointer_value (w, code);
2000 emit_pointer_value (w, code + code_size);
2001
2002 /* Subprogram end */
2003 emit_uleb128 (w, 0x0);
2004
2005 emit_debug_info_end (w);
2006
2007 /* Emit unwind info */
2008 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2009 w->fde_index ++;
2010 }
2011
2012 #else /* !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
2013
2014 MONO_EMPTY_SOURCE_FILE (dwarfwriter);
2015
2016 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
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