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update rx (mobile builds).
[mono-project.git] / mono / mini / dwarfwriter.c
blob2f216dda226e0456f03c6df7c38fda188a367ed3
1 /*
2 * dwarfwriter.c: Creation of DWARF debug information
3 *
4 * Author:
5 * Zoltan Varga (vargaz@gmail.com)
6 *
7 * (C) 2008-2009 Novell, Inc.
8 */
9
10 #include "config.h"
11
12 #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
13 #include "dwarfwriter.h"
14
15 #include <sys/types.h>
16 #include <ctype.h>
17 #include <string.h>
18 #ifdef HAVE_STDINT_H
19 #include <stdint.h>
20 #endif
21
22 #include <mono/metadata/mono-endian.h>
23 #include <mono/metadata/debug-mono-symfile.h>
24 #include <mono/utils/mono-compiler.h>
25
26 #ifndef HOST_WIN32
27 #include <mono/utils/freebsd-elf32.h>
28 #include <mono/utils/freebsd-elf64.h>
29 #endif
30
31 #include <mono/utils/freebsd-dwarf.h>
32
33 typedef struct {
34 MonoMethod *method;
35 char *start_symbol, *end_symbol;
36 guint8 *code;
37 guint32 code_size;
38 MonoDebugMethodJitInfo *debug_info;
39 } MethodLineNumberInfo;
40
41 struct _MonoDwarfWriter
42 {
43 MonoImageWriter *w;
44 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
45 GHashTable *class_to_reference_die;
46 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
47 GHashTable *file_to_index, *index_to_file, *dir_to_index;
48 FILE *il_file;
49 int il_file_line_index, loclist_index;
50 GSList *cie_program;
51 FILE *fp;
52 const char *temp_prefix;
53 gboolean emit_line, appending, collect_line_info;
54 GSList *line_info;
55 int cur_file_index;
56 };
57
58 static void
59 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
60 char *start_symbol, char *end_symbol,
61 guint8 *code, guint32 code_size,
62 MonoDebugMethodJitInfo *debug_info);
63
64 /*
65 * mono_dwarf_writer_create:
66 *
67 * Create a DWARF writer object. WRITER is the underlying image writer this
68 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
69 * methods which have no line number info. It can be NULL.
70 * If APPENDING is TRUE, the output file will be in assembleable state after each
71 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
72 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
73 * debug information.
74 */
75 MonoDwarfWriter*
76 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean appending)
77 {
78 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
79
80 /*
81 * The appending flag is needed because we use subsections to order things in
82 * the debug info, and:
83 * - apple's assembler doesn't support them
84 * - the binary writer has problems with subsections+alignment
85 * So instead of subsections, we use the _close () function in AOT mode,
86 * which writes out things in order.
87 */
88
89 w->w = writer;
90 w->il_file = il_file;
91 w->il_file_line_index = il_file_start_line;
92 w->appending = appending;
93
94 if (appending)
95 g_assert (img_writer_subsections_supported (w->w));
96
97 w->emit_line = TRUE;
98
99 if (appending) {
100 if (!img_writer_subsections_supported (w->w))
101 /* Can't emit line number info without subsections */
102 w->emit_line = FALSE;
103 } else {
104 /* Collect line number info and emit it at once */
105 w->collect_line_info = TRUE;
106 }
107
108 w->fp = img_writer_get_fp (w->w);
109 w->temp_prefix = img_writer_get_temp_label_prefix (w->w);
110
111 w->class_to_die = g_hash_table_new (NULL, NULL);
112 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
113 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
114 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
115 w->cur_file_index = -1;
116
117 return w;
118 }
119
120 void
121 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
122 {
123 g_free (w);
124 }
125
126 int
127 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
128 {
129 return w->il_file_line_index;
130 }
131
132 /* Wrappers around the image writer functions */
133
134 static inline void
135 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
136 {
137 img_writer_emit_section_change (w->w, section_name, subsection_index);
138 }
139
140 static inline void
141 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
142 {
143 img_writer_emit_push_section (w->w, section_name, subsection);
144 }
145
146 static inline void
147 emit_pop_section (MonoDwarfWriter *w)
148 {
149 img_writer_emit_pop_section (w->w);
150 }
151
152 static inline void
153 emit_local_symbol (MonoDwarfWriter *w, const char *name, const char *end_label, gboolean func)
154 {
155 img_writer_emit_local_symbol (w->w, name, end_label, func);
156 }
157
158 static inline void
159 emit_label (MonoDwarfWriter *w, const char *name)
160 {
161 img_writer_emit_label (w->w, name);
162 }
163
164 static inline void
165 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
166 {
167 img_writer_emit_bytes (w->w, buf, size);
168 }
169
170 static inline void
171 emit_string (MonoDwarfWriter *w, const char *value)
172 {
173 img_writer_emit_string (w->w, value);
174 }
175
176 static inline void
177 emit_line (MonoDwarfWriter *w)
178 {
179 img_writer_emit_line (w->w);
180 }
181
182 static inline void
183 emit_alignment (MonoDwarfWriter *w, int size)
184 {
185 img_writer_emit_alignment (w->w, size);
186 }
187
188 static inline void
189 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
190 {
191 img_writer_emit_pointer_unaligned (w->w, target);
192 }
193
194 static inline void
195 emit_pointer (MonoDwarfWriter *w, const char *target)
196 {
197 img_writer_emit_pointer (w->w, target);
198 }
199
200 static inline void
201 emit_int16 (MonoDwarfWriter *w, int value)
202 {
203 img_writer_emit_int16 (w->w, value);
204 }
205
206 static inline void
207 emit_int32 (MonoDwarfWriter *w, int value)
208 {
209 img_writer_emit_int32 (w->w, value);
210 }
211
212 static inline void
213 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
214 {
215 img_writer_emit_symbol_diff (w->w, end, start, offset);
216 }
217
218 static inline void
219 emit_zero_bytes (MonoDwarfWriter *w, int num)
220 {
221 img_writer_emit_zero_bytes (w->w, num);
222 }
223
224 static inline void
225 emit_byte (MonoDwarfWriter *w, guint8 val)
226 {
227 img_writer_emit_byte (w->w, val);
228 }
229
230 static G_GNUC_UNUSED void
231 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
232 {
233 do {
234 guint8 b = value & 0x7f;
235 value >>= 7;
236 if (value != 0) /* more bytes to come */
237 b |= 0x80;
238 emit_byte (w, b);
239 } while (value);
240 }
241
242 static G_GNUC_UNUSED void
243 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
244 {
245 gboolean more = 1;
246 gboolean negative = (value < 0);
247 guint32 size = 64;
248 guint8 byte;
249
250 while (more) {
251 byte = value & 0x7f;
252 value >>= 7;
253 /* the following is unnecessary if the
254 * implementation of >>= uses an arithmetic rather
255 * than logical shift for a signed left operand
256 */
257 if (negative)
258 /* sign extend */
259 value |= - ((gint64)1 <<(size - 7));
260 /* sign bit of byte is second high order bit (0x40) */
261 if ((value == 0 && !(byte & 0x40)) ||
262 (value == -1 && (byte & 0x40)))
263 more = 0;
264 else
265 byte |= 0x80;
266 emit_byte (w, byte);
267 }
268 }
269
270 static G_GNUC_UNUSED void
271 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
272 {
273 guint8 *p = buf;
274
275 do {
276 guint8 b = value & 0x7f;
277 value >>= 7;
278 if (value != 0) /* more bytes to come */
279 b |= 0x80;
280 *p ++ = b;
281 } while (value);
282
283 *endbuf = p;
284 }
285
286 static G_GNUC_UNUSED void
287 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
288 {
289 gboolean more = 1;
290 gboolean negative = (value < 0);
291 guint32 size = 32;
292 guint8 byte;
293 guint8 *p = buf;
294
295 while (more) {
296 byte = value & 0x7f;
297 value >>= 7;
298 /* the following is unnecessary if the
299 * implementation of >>= uses an arithmetic rather
300 * than logical shift for a signed left operand
301 */
302 if (negative)
303 /* sign extend */
304 value |= - (1 <<(size - 7));
305 /* sign bit of byte is second high order bit (0x40) */
306 if ((value == 0 && !(byte & 0x40)) ||
307 (value == -1 && (byte & 0x40)))
308 more = 0;
309 else
310 byte |= 0x80;
311 *p ++= byte;
312 }
313
314 *endbuf = p;
315 }
316
317 static void
318 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
319 int *attrs, int attrs_len)
320 {
321 int i;
322
323 emit_uleb128 (w, code);
324 emit_uleb128 (w, tag);
325 emit_byte (w, has_child);
326
327 for (i = 0; i < attrs_len; i++)
328 emit_uleb128 (w, attrs [i]);
329 emit_uleb128 (w, 0);
330 emit_uleb128 (w, 0);
331 }
332
333 static void
334 emit_cie (MonoDwarfWriter *w)
335 {
336 emit_section_change (w, ".debug_frame", 0);
337
338 emit_alignment (w, 8);
339
340 /* Emit a CIE */
341 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
342 emit_label (w, ".Lcie0_start");
343 emit_int32 (w, 0xffffffff); /* CIE id */
344 emit_byte (w, 3); /* version */
345 emit_string (w, ""); /* augmention */
346 emit_sleb128 (w, 1); /* code alignment factor */
347 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
348 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
349
350 w->cie_program = w->cie_program;
351 if (w->cie_program) {
352 guint32 uw_info_len;
353 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
354 emit_bytes (w, uw_info, uw_info_len);
355 g_free (uw_info);
356 }
357
358 emit_alignment (w, sizeof (gpointer));
359 emit_label (w, ".Lcie0_end");
360 }
361
362 static void
363 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
364 {
365 gssize val = (gssize)ptr;
366 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
367 }
368
369 static void
370 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
371 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
372 {
373 char symbol1 [128];
374 char symbol2 [128];
375 GSList *l;
376 guint8 *uw_info;
377 guint32 uw_info_len;
378
379 emit_section_change (w, ".debug_frame", 0);
380
381 sprintf (symbol1, ".Lfde%d_start", fde_index);
382 sprintf (symbol2, ".Lfde%d_end", fde_index);
383 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
384 emit_label (w, symbol1);
385 emit_int32 (w, 0); /* CIE_pointer */
386 if (start_symbol) {
387 emit_pointer (w, start_symbol); /* initial_location */
388 if (end_symbol)
389 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
390 else {
391 g_assert (code_size);
392 emit_int32 (w, code_size);
393 }
394 } else {
395 emit_pointer_value (w, code);
396 emit_int32 (w, code_size);
397 }
398 #if SIZEOF_VOID_P == 8
399 /* Upper 32 bits of code size */
400 emit_int32 (w, 0);
401 #endif
402
403 l = unwind_ops;
404 if (w->cie_program) {
405 // FIXME: Check that the ops really begin with the CIE program */
406 int i;
407
408 for (i = 0; i < g_slist_length (w->cie_program); ++i)
409 if (l)
410 l = l->next;
411 }
412
413 /* Convert the list of MonoUnwindOps to the format used by DWARF */
414 uw_info = mono_unwind_ops_encode (l, &uw_info_len);
415 emit_bytes (w, uw_info, uw_info_len);
416 g_free (uw_info);
417
418 emit_alignment (w, sizeof (mgreg_t));
419 emit_label (w, symbol2);
420 }
421
422 /* Abbrevations */
423 #define ABBREV_COMPILE_UNIT 1
424 #define ABBREV_SUBPROGRAM 2
425 #define ABBREV_PARAM 3
426 #define ABBREV_BASE_TYPE 4
427 #define ABBREV_STRUCT_TYPE 5
428 #define ABBREV_DATA_MEMBER 6
429 #define ABBREV_TYPEDEF 7
430 #define ABBREV_ENUM_TYPE 8
431 #define ABBREV_ENUMERATOR 9
432 #define ABBREV_NAMESPACE 10
433 #define ABBREV_VARIABLE 11
434 #define ABBREV_VARIABLE_LOCLIST 12
435 #define ABBREV_POINTER_TYPE 13
436 #define ABBREV_REFERENCE_TYPE 14
437 #define ABBREV_PARAM_LOCLIST 15
438 #define ABBREV_INHERITANCE 16
439 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
440 #define ABBREV_TRAMP_SUBPROGRAM 18
441
442 static int compile_unit_attr [] = {
443 DW_AT_producer ,DW_FORM_string,
444 DW_AT_name ,DW_FORM_string,
445 DW_AT_comp_dir ,DW_FORM_string,
446 DW_AT_language ,DW_FORM_data1,
447 DW_AT_low_pc ,DW_FORM_addr,
448 DW_AT_high_pc ,DW_FORM_addr,
449 DW_AT_stmt_list ,DW_FORM_data4
450 };
451
452 static int subprogram_attr [] = {
453 DW_AT_name , DW_FORM_string,
454 #ifndef TARGET_IOS
455 DW_AT_description , DW_FORM_string,
456 #endif
457 DW_AT_low_pc , DW_FORM_addr,
458 DW_AT_high_pc , DW_FORM_addr,
459 DW_AT_frame_base , DW_FORM_block1
460 };
461
462 static int tramp_subprogram_attr [] = {
463 DW_AT_name , DW_FORM_string,
464 #ifndef TARGET_IOS
465 DW_AT_description , DW_FORM_string,
466 #endif
467 DW_AT_low_pc , DW_FORM_addr,
468 DW_AT_high_pc , DW_FORM_addr,
469 };
470
471 static int param_attr [] = {
472 DW_AT_name, DW_FORM_string,
473 DW_AT_type, DW_FORM_ref4,
474 DW_AT_location, DW_FORM_block1
475 };
476
477 static int param_loclist_attr [] = {
478 DW_AT_name, DW_FORM_string,
479 DW_AT_type, DW_FORM_ref4,
480 DW_AT_location, DW_FORM_data4
481 };
482
483 static int base_type_attr [] = {
484 DW_AT_byte_size, DW_FORM_data1,
485 DW_AT_encoding, DW_FORM_data1,
486 DW_AT_name, DW_FORM_string
487 };
488
489 static int struct_type_attr [] = {
490 DW_AT_name, DW_FORM_string,
491 DW_AT_byte_size, DW_FORM_udata,
492 };
493
494 static int data_member_attr [] = {
495 DW_AT_name, DW_FORM_string,
496 DW_AT_type, DW_FORM_ref4,
497 DW_AT_data_member_location, DW_FORM_block1
498 };
499
500 static int typedef_attr [] = {
501 DW_AT_name, DW_FORM_string,
502 DW_AT_type, DW_FORM_ref4
503 };
504
505 static int pointer_type_attr [] = {
506 DW_AT_type, DW_FORM_ref4,
507 };
508
509 static int reference_type_attr [] = {
510 DW_AT_type, DW_FORM_ref4,
511 };
512
513 static int enum_type_attr [] = {
514 DW_AT_name, DW_FORM_string,
515 DW_AT_byte_size, DW_FORM_udata,
516 DW_AT_type, DW_FORM_ref4,
517 };
518
519 static int enumerator_attr [] = {
520 DW_AT_name, DW_FORM_string,
521 DW_AT_const_value, DW_FORM_sdata,
522 };
523
524 static int namespace_attr [] = {
525 DW_AT_name, DW_FORM_string,
526 };
527
528 static int variable_attr [] = {
529 DW_AT_name, DW_FORM_string,
530 DW_AT_type, DW_FORM_ref4,
531 DW_AT_location, DW_FORM_block1
532 };
533
534 static int variable_loclist_attr [] = {
535 DW_AT_name, DW_FORM_string,
536 DW_AT_type, DW_FORM_ref4,
537 DW_AT_location, DW_FORM_data4
538 };
539
540 static int inheritance_attr [] = {
541 DW_AT_type, DW_FORM_ref4,
542 DW_AT_data_member_location, DW_FORM_block1
543 };
544
545 typedef struct DwarfBasicType {
546 const char *die_name, *name;
547 int type;
548 int size;
549 int encoding;
550 } DwarfBasicType;
551
552 static DwarfBasicType basic_types [] = {
553 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
554 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
555 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
556 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
557 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
558 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
559 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
560 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
561 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
562 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
563 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
564 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
565 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
566 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
567 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
568 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
569 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
570 };
571
572 /* Constants for encoding line number special opcodes */
573 #define OPCODE_BASE 13
574 #define LINE_BASE -5
575 #define LINE_RANGE 14
576
577 /* Subsections of the .debug_line section */
578 #define LINE_SUBSECTION_HEADER 1
579 #define LINE_SUBSECTION_INCLUDES 2
580 #define LINE_SUBSECTION_FILES 3
581 #define LINE_SUBSECTION_DATA 4
582 #define LINE_SUBSECTION_END 5
583
584 static int
585 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
586 gint64 last_mod_time, gint64 file_size)
587 {
588 int index;
589 int dir_index;
590 char *basename = NULL;
591
592 if (!w->file_to_index)
593 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
594
595 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
596 if (index > 0)
597 return index;
598
599 if (g_path_is_absolute (name)) {
600 char *dir = g_path_get_dirname (name);
601
602 if (!w->dir_to_index)
603 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
604
605 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
606 if (dir_index == 0) {
607 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
608 emit_string (w, dir);
609
610 dir_index = ++ w->line_number_dir_index;
611 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
612 }
613
614 g_free (dir);
615
616 basename = g_path_get_basename (name);
617 } else {
618 dir_index = 0;
619 }
620
621 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
622
623 if (basename)
624 emit_string (w, basename);
625 else
626 emit_string (w, name);
627 emit_uleb128 (w, dir_index);
628 emit_byte (w, 0);
629 emit_byte (w, 0);
630
631 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
632
633 if (basename)
634 g_free (basename);
635
636 index = ++ w->line_number_file_index;
637 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
638
639 return index;
640 }
641
642 static int
643 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
644 {
645 int index;
646
647 g_assert (w->file_to_index);
648 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
649 g_assert (index > 0);
650 return index - 1;
651 }
652
653 static int
654 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
655 gint64 last_mod_time, gint64 file_size)
656 {
657 int index;
658 char *copy;
659
660 if (!w->file_to_index) {
661 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
662 w->index_to_file = g_hash_table_new (NULL, NULL);
663 }
664
665 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
666 if (index > 0)
667 return index - 1;
668 index = w->line_number_file_index;
669 w->line_number_file_index ++;
670 copy = g_strdup (name);
671 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
672 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
673
674 return index;
675 }
676
677 static void
678 emit_line_number_info_begin (MonoDwarfWriter *w)
679 {
680 /* Line number info header */
681 /*
682 * GAS seems to emit its own data to the end of the first subsection, so we use
683 * subsections 1, 2 etc:
684 * 1 - contains the header
685 * 2 - contains the file names
686 * 3 - contains the end of the header + the data
687 * 4 - the end symbol
688 */
689 emit_section_change (w, ".debug_line", 0);
690 emit_label (w, ".Ldebug_line_section_start");
691 emit_section_change (w, ".debug_line", LINE_SUBSECTION_HEADER);
692 emit_label (w, ".Ldebug_line_start");
693 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
694 emit_int16 (w, 0x2); /* version */
695 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
696 emit_byte (w, 1); /* minimum_instruction_length */
697 emit_byte (w, 1); /* default_is_stmt */
698 emit_byte (w, LINE_BASE); /* line_base */
699 emit_byte (w, LINE_RANGE); /* line_range */
700 emit_byte (w, OPCODE_BASE); /* opcode_base */
701 emit_byte (w, 0); /* standard_opcode_lengths */
702 emit_byte (w, 1);
703 emit_byte (w, 1);
704 emit_byte (w, 1);
705 emit_byte (w, 1);
706 emit_byte (w, 0);
707 emit_byte (w, 0);
708 emit_byte (w, 0);
709 emit_byte (w, 1);
710 emit_byte (w, 0);
711 emit_byte (w, 0);
712 emit_byte (w, 1);
713
714 /* Includes */
715 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
716
717 /* End of Includes */
718 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
719 emit_byte (w, 0);
720
721 /* Files */
722 emit_line_number_file_name (w, "xdb.il", 0, 0);
723
724 /* End of Files */
725 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
726 emit_byte (w, 0);
727
728 emit_label (w, ".Ldebug_line_header_end");
729
730 /* Emit this into a separate subsection so it gets placed at the end */
731 emit_section_change (w, ".debug_line", LINE_SUBSECTION_END);
732
733 emit_byte (w, 0);
734 emit_byte (w, 1);
735 emit_byte (w, DW_LNE_end_sequence);
736
737 emit_label (w, ".Ldebug_line_end");
738 }
739
740 static char *
741 escape_path (char *name)
742 {
743 if (strchr (name, '\\')) {
744 char *s = g_malloc (strlen (name) * 2);
745 int len, i, j;
746
747 len = strlen (name);
748 j = 0;
749 for (i = 0; i < len; ++i) {
750 if (name [i] == '\\') {
751 s [j ++] = '\\';
752 s [j ++] = '\\';
753 } else {
754 s [j ++] = name [i];
755 }
756 }
757 return s;
758 }
759 return name;
760 }
761
762 static void
763 emit_all_line_number_info (MonoDwarfWriter *w)
764 {
765 int i;
766 GHashTable *dir_to_index, *index_to_dir;
767 GSList *l;
768 GSList *info_list;
769
770 g_assert (w->collect_line_info);
771
772 add_line_number_file_name (w, "<unknown>", 0, 0);
773
774 /* Collect files */
775 info_list = g_slist_reverse (w->line_info);
776 for (l = info_list; l; l = l->next) {
777 MethodLineNumberInfo *info = l->data;
778 MonoDebugMethodInfo *minfo;
779 char *source_file;
780 GPtrArray *source_file_list;
781
782 // FIXME: Free stuff
783 minfo = mono_debug_lookup_method (info->method);
784 if (!minfo)
785 continue;
786
787 mono_debug_symfile_get_line_numbers_full (minfo, &source_file, &source_file_list, NULL, NULL, NULL, NULL, NULL);
788 for (i = 0; i < source_file_list->len; ++i) {
789 MonoDebugSourceInfo *sinfo = g_ptr_array_index (source_file_list, i);
790 add_line_number_file_name (w, sinfo->source_file, 0, 0);
791 }
792 }
793
794 /* Preprocess files */
795 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
796 index_to_dir = g_hash_table_new (NULL, NULL);
797 for (i = 0; i < w->line_number_file_index; ++i) {
798 char *name = g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
799 char *copy;
800 int dir_index = 0;
801
802 if (g_path_is_absolute (name)) {
803 char *dir = g_path_get_dirname (name);
804
805 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
806 if (dir_index == 0) {
807 dir_index = w->line_number_dir_index;
808 w->line_number_dir_index ++;
809 copy = g_strdup (dir);
810 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
811 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
812 } else {
813 dir_index --;
814 }
815
816 g_free (dir);
817 }
818 }
819
820 /* Line number info header */
821 emit_section_change (w, ".debug_line", 0);
822 emit_label (w, ".Ldebug_line_section_start");
823 emit_label (w, ".Ldebug_line_start");
824 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
825 emit_int16 (w, 0x2); /* version */
826 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
827 emit_byte (w, 1); /* minimum_instruction_length */
828 emit_byte (w, 1); /* default_is_stmt */
829 emit_byte (w, LINE_BASE); /* line_base */
830 emit_byte (w, LINE_RANGE); /* line_range */
831 emit_byte (w, OPCODE_BASE); /* opcode_base */
832 emit_byte (w, 0); /* standard_opcode_lengths */
833 emit_byte (w, 1);
834 emit_byte (w, 1);
835 emit_byte (w, 1);
836 emit_byte (w, 1);
837 emit_byte (w, 0);
838 emit_byte (w, 0);
839 emit_byte (w, 0);
840 emit_byte (w, 1);
841 emit_byte (w, 0);
842 emit_byte (w, 0);
843 emit_byte (w, 1);
844
845 /* Includes */
846 emit_section_change (w, ".debug_line", 0);
847 for (i = 0; i < w->line_number_dir_index; ++i) {
848 char *dir = g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
849
850 emit_string (w, escape_path (dir));
851 }
852 /* End of Includes */
853 emit_byte (w, 0);
854
855 /* Files */
856 for (i = 0; i < w->line_number_file_index; ++i) {
857 char *name = g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
858 char *basename = NULL, *dir;
859 int dir_index = 0;
860
861 if (g_path_is_absolute (name)) {
862 dir = g_path_get_dirname (name);
863
864 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
865 basename = g_path_get_basename (name);
866 }
867
868 if (basename)
869 emit_string (w, basename);
870 else
871 emit_string (w, escape_path (name));
872 emit_uleb128 (w, dir_index);
873 emit_byte (w, 0);
874 emit_byte (w, 0);
875 }
876
877 /* End of Files */
878 emit_byte (w, 0);
879
880 emit_label (w, ".Ldebug_line_header_end");
881
882 /* Emit line number table */
883 for (l = info_list; l; l = l->next) {
884 MethodLineNumberInfo *info = l->data;
885
886 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, info->debug_info);
887 }
888 g_slist_free (info_list);
889
890 emit_byte (w, 0);
891 emit_byte (w, 1);
892 emit_byte (w, DW_LNE_end_sequence);
893
894 emit_label (w, ".Ldebug_line_end");
895 }
896
897 /*
898 * Some assemblers like apple's do not support subsections, so we can't place
899 * .Ldebug_info_end at the end of the section using subsections. Instead, we
900 * define it every time something gets added to the .debug_info section.
901 * The apple assember seems to use the last definition.
902 */
903 static void
904 emit_debug_info_end (MonoDwarfWriter *w)
905 {
906 /* This doesn't seem to work/required with recent iphone sdk versions */
907 #if 0
908 if (!img_writer_subsections_supported (w->w))
909 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
910 #endif
911 }
912
913 void
914 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, GSList *base_unwind_program)
915 {
916 char *s, *build_info;
917 int i;
918
919 w->cie_program = base_unwind_program;
920
921 emit_section_change (w, ".debug_abbrev", 0);
922 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
923 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
924 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
925 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
926 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
927 param_attr, G_N_ELEMENTS (param_attr));
928 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
929 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
930 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
931 base_type_attr, G_N_ELEMENTS (base_type_attr));
932 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
933 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
934 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
935 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
936 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
937 data_member_attr, G_N_ELEMENTS (data_member_attr));
938 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
939 typedef_attr, G_N_ELEMENTS (typedef_attr));
940 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
941 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
942 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
943 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
944 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
945 namespace_attr, G_N_ELEMENTS (namespace_attr));
946 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
947 variable_attr, G_N_ELEMENTS (variable_attr));
948 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
949 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
950 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
951 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
952 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
953 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
954 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
955 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
956 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
957 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
958 emit_byte (w, 0);
959
960 emit_section_change (w, ".debug_info", 0);
961 emit_label (w, ".Ldebug_info_start");
962 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
963 emit_label (w, ".Ldebug_info_begin");
964 emit_int16 (w, 0x2); /* DWARF version 2 */
965 emit_int32 (w, 0); /* .debug_abbrev offset */
966 emit_byte (w, sizeof (gpointer)); /* address size */
967
968 if (img_writer_subsections_supported (w->w) && w->appending) {
969 /* Emit this into a separate section so it gets placed at the end */
970 emit_section_change (w, ".debug_info", 1);
971 emit_byte (w, 0); /* close COMPILE_UNIT */
972 emit_label (w, ".Ldebug_info_end");
973 emit_section_change (w, ".debug_info", 0);
974 }
975
976 /* Compilation unit */
977 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
978 build_info = mono_get_runtime_build_info ();
979 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
980 emit_string (w, s);
981 g_free (build_info);
982 g_free (s);
983 emit_string (w, "JITted code");
984 emit_string (w, "");
985 emit_byte (w, DW_LANG_C);
986 emit_pointer_value (w, 0);
987 emit_pointer_value (w, 0);
988 /* offset into .debug_line section */
989 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
990
991 /* Base types */
992 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
993 emit_label (w, basic_types [i].die_name);
994 emit_uleb128 (w, ABBREV_BASE_TYPE);
995 emit_byte (w, basic_types [i].size);
996 emit_byte (w, basic_types [i].encoding);
997 emit_string (w, basic_types [i].name);
998 }
999
1000 emit_debug_info_end (w);
1001
1002 /* debug_loc section */
1003 emit_section_change (w, ".debug_loc", 0);
1004 emit_label (w, ".Ldebug_loc_start");
1005
1006 /* debug_line section */
1007 /*
1008 * We emit some info even if emit_line is FALSE, as the
1009 * apple linker seems to require a .debug_line section.
1010 */
1011 if (!w->collect_line_info)
1012 emit_line_number_info_begin (w);
1013
1014 emit_cie (w);
1015 }
1016
1017 /*
1018 * mono_dwarf_writer_close:
1019 *
1020 * Finalize the emitted debugging info.
1021 */
1022 void
1023 mono_dwarf_writer_close (MonoDwarfWriter *w)
1024 {
1025 if (!w->appending) {
1026 emit_section_change (w, ".debug_info", 0);
1027 emit_byte (w, 0); /* close COMPILE_UNIT */
1028 emit_label (w, ".Ldebug_info_end");
1029 }
1030
1031 if (w->collect_line_info)
1032 emit_all_line_number_info (w);
1033 }
1034
1035 static void emit_type (MonoDwarfWriter *w, MonoType *t);
1036 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
1037
1038 static const char*
1039 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
1040 {
1041 GHashTable *cache;
1042
1043 if (vtype)
1044 cache = w->class_to_vtype_die;
1045 else
1046 cache = w->class_to_die;
1047
1048 return g_hash_table_lookup (cache, klass);
1049 }
1050
1051 /* Returns the local symbol pointing to the emitted debug info */
1052 static char*
1053 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
1054 {
1055 char *die, *pointer_die, *reference_die;
1056 char *full_name, *p;
1057 gpointer iter;
1058 MonoClassField *field;
1059 const char *fdie;
1060 int k;
1061 gboolean emit_namespace = FALSE, has_children;
1062 GHashTable *cache;
1063
1064 if (vtype)
1065 cache = w->class_to_vtype_die;
1066 else
1067 cache = w->class_to_die;
1068
1069 die = g_hash_table_lookup (cache, klass);
1070 if (die)
1071 return die;
1072
1073 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) ||
1074 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
1075 return NULL;
1076
1077 /*
1078 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
1079 */
1080 /*
1081 if (klass->name_space && klass->name_space [0] != '\0')
1082 emit_namespace = TRUE;
1083 */
1084 if (emit_namespace) {
1085 emit_uleb128 (w, ABBREV_NAMESPACE);
1086 emit_string (w, klass->name_space);
1087 }
1088
1089 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
1090 /*
1091 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
1092 * to separate components.
1093 */
1094 for (p = full_name; *p; p ++)
1095 if (*p == '.')
1096 *p = '_';
1097
1098 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
1099 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
1100 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
1101 w->tdie_index ++;
1102
1103 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
1104 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
1105 g_hash_table_insert (cache, klass, die);
1106
1107 if (klass->enumtype) {
1108 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
1109
1110 emit_label (w, die);
1111
1112 emit_uleb128 (w, ABBREV_ENUM_TYPE);
1113 emit_string (w, full_name);
1114 emit_uleb128 (w, size);
1115 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
1116 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
1117 break;
1118 g_assert (k < G_N_ELEMENTS (basic_types));
1119 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
1120
1121 /* Emit enum values */
1122 iter = NULL;
1123 while ((field = mono_class_get_fields (klass, &iter))) {
1124 const char *p;
1125 int len;
1126 MonoTypeEnum def_type;
1127
1128 if (strcmp ("value__", mono_field_get_name (field)) == 0)
1129 continue;
1130 if (mono_field_is_deleted (field))
1131 continue;
1132
1133 emit_uleb128 (w, ABBREV_ENUMERATOR);
1134 emit_string (w, mono_field_get_name (field));
1135
1136 p = mono_class_get_field_default_value (field, &def_type);
1137 len = mono_metadata_decode_blob_size (p, &p);
1138 switch (mono_class_enum_basetype (klass)->type) {
1139 case MONO_TYPE_U1:
1140 case MONO_TYPE_I1:
1141 case MONO_TYPE_BOOLEAN:
1142 emit_sleb128 (w, *p);
1143 break;
1144 case MONO_TYPE_U2:
1145 case MONO_TYPE_I2:
1146 case MONO_TYPE_CHAR:
1147 emit_sleb128 (w, read16 (p));
1148 break;
1149 case MONO_TYPE_U4:
1150 case MONO_TYPE_I4:
1151 emit_sleb128 (w, read32 (p));
1152 break;
1153 case MONO_TYPE_U8:
1154 case MONO_TYPE_I8:
1155 emit_sleb128 (w, read64 (p));
1156 break;
1157 case MONO_TYPE_I:
1158 case MONO_TYPE_U:
1159 #if SIZEOF_VOID_P == 8
1160 emit_sleb128 (w, read64 (p));
1161 #else
1162 emit_sleb128 (w, read32 (p));
1163 #endif
1164 break;
1165 default:
1166 g_assert_not_reached ();
1167 }
1168 }
1169
1170 has_children = TRUE;
1171 } else {
1172 guint8 buf [128];
1173 guint8 *p;
1174 char *parent_die;
1175
1176 if (klass->parent)
1177 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1178 else
1179 parent_die = NULL;
1180
1181 /* Emit field types */
1182 iter = NULL;
1183 while ((field = mono_class_get_fields (klass, &iter))) {
1184 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1185 continue;
1186
1187 emit_type (w, field->type);
1188 }
1189
1190 iter = NULL;
1191 has_children = parent_die || mono_class_get_fields (klass, &iter);
1192
1193 emit_label (w, die);
1194
1195 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1196 emit_string (w, full_name);
1197 emit_uleb128 (w, klass->instance_size);
1198
1199 if (parent_die) {
1200 emit_uleb128 (w, ABBREV_INHERITANCE);
1201 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1202
1203 p = buf;
1204 *p ++= DW_OP_plus_uconst;
1205 encode_uleb128 (0, p, &p);
1206 emit_byte (w, p - buf);
1207 emit_bytes (w, buf, p - buf);
1208 }
1209
1210 /* Emit fields */
1211 iter = NULL;
1212 while ((field = mono_class_get_fields (klass, &iter))) {
1213 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1214 continue;
1215
1216 fdie = get_type_die (w, field->type);
1217 if (fdie) {
1218 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1219 emit_string (w, field->name);
1220 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1221 /* location */
1222 p = buf;
1223 *p ++= DW_OP_plus_uconst;
1224 if (klass->valuetype && vtype)
1225 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1226 else
1227 encode_uleb128 (field->offset, p, &p);
1228
1229 emit_byte (w, p - buf);
1230 emit_bytes (w, buf, p - buf);
1231 }
1232 }
1233 }
1234
1235 /* Type end */
1236 if (has_children)
1237 emit_uleb128 (w, 0x0);
1238
1239 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1240 emit_uleb128 (w, ABBREV_TYPEDEF);
1241 emit_string (w, full_name);
1242 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1243
1244 /* Add a pointer type */
1245 emit_label (w, pointer_die);
1246
1247 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1248 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1249
1250 /* Add a reference type */
1251 emit_label (w, reference_die);
1252
1253 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1254 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1255
1256 g_free (full_name);
1257
1258 if (emit_namespace) {
1259 /* Namespace end */
1260 emit_uleb128 (w, 0x0);
1261 }
1262
1263 return die;
1264 }
1265
1266 static gboolean base_types_emitted [64];
1267
1268 static const char*
1269 get_type_die (MonoDwarfWriter *w, MonoType *t)
1270 {
1271 MonoClass *klass = mono_class_from_mono_type (t);
1272 int j;
1273 const char *tdie;
1274
1275 if (t->byref) {
1276 if (t->type == MONO_TYPE_VALUETYPE) {
1277 tdie = g_hash_table_lookup (w->class_to_pointer_die, klass);
1278 }
1279 else {
1280 tdie = get_class_die (w, klass, FALSE);
1281 /* Should return a pointer type to a reference */
1282 }
1283 // FIXME:
1284 t = &mono_defaults.int_class->byval_arg;
1285 }
1286 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1287 if (basic_types [j].type == t->type)
1288 break;
1289 if (j < G_N_ELEMENTS (basic_types)) {
1290 tdie = basic_types [j].die_name;
1291 } else {
1292 switch (t->type) {
1293 case MONO_TYPE_CLASS:
1294 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1295 //tdie = ".LDIE_OBJECT";
1296 break;
1297 case MONO_TYPE_ARRAY:
1298 tdie = ".LDIE_OBJECT";
1299 break;
1300 case MONO_TYPE_VALUETYPE:
1301 if (klass->enumtype)
1302 tdie = get_class_die (w, klass, FALSE);
1303 else
1304 tdie = ".LDIE_I4";
1305 break;
1306 case MONO_TYPE_GENERICINST:
1307 if (!MONO_TYPE_ISSTRUCT (t)) {
1308 tdie = g_hash_table_lookup (w->class_to_reference_die, klass);
1309 } else {
1310 tdie = ".LDIE_I4";
1311 }
1312 break;
1313 case MONO_TYPE_PTR:
1314 tdie = ".LDIE_I";
1315 break;
1316 default:
1317 tdie = ".LDIE_I4";
1318 break;
1319 }
1320 }
1321
1322 g_assert (tdie);
1323
1324 return tdie;
1325 }
1326
1327 static void
1328 emit_type (MonoDwarfWriter *w, MonoType *t)
1329 {
1330 MonoClass *klass = mono_class_from_mono_type (t);
1331 int j;
1332 const char *tdie;
1333
1334 if (t->byref) {
1335 if (t->type == MONO_TYPE_VALUETYPE) {
1336 tdie = emit_class_dwarf_info (w, klass, TRUE);
1337 if (tdie)
1338 return;
1339 }
1340 else {
1341 emit_class_dwarf_info (w, klass, FALSE);
1342 }
1343 // FIXME:
1344 t = &mono_defaults.int_class->byval_arg;
1345 }
1346 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1347 if (basic_types [j].type == t->type)
1348 break;
1349 if (j < G_N_ELEMENTS (basic_types)) {
1350 /* Emit a boxed version of base types */
1351 if (j < 64 && !base_types_emitted [j]) {
1352 emit_class_dwarf_info (w, klass, FALSE);
1353 base_types_emitted [j] = TRUE;
1354 }
1355 } else {
1356 switch (t->type) {
1357 case MONO_TYPE_CLASS:
1358 emit_class_dwarf_info (w, klass, FALSE);
1359 break;
1360 case MONO_TYPE_ARRAY:
1361 break;
1362 case MONO_TYPE_VALUETYPE:
1363 if (klass->enumtype)
1364 emit_class_dwarf_info (w, klass, FALSE);
1365 break;
1366 case MONO_TYPE_GENERICINST:
1367 if (!MONO_TYPE_ISSTRUCT (t))
1368 emit_class_dwarf_info (w, klass, FALSE);
1369 break;
1370 case MONO_TYPE_PTR:
1371 break;
1372 default:
1373 break;
1374 }
1375 }
1376 }
1377
1378 static void
1379 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1380 {
1381 const char *tdie;
1382
1383 tdie = get_type_die (w, t);
1384
1385 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1386 }
1387
1388 static void
1389 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1390 {
1391 /* location */
1392 /* FIXME: This needs a location list, since the args can go from reg->stack */
1393 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1394 /* gdb treats this as optimized out */
1395 } else if (ins->opcode == OP_REGVAR) {
1396 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1397 p ++;
1398 } else if (ins->opcode == OP_REGOFFSET) {
1399 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1400 encode_sleb128 (ins->inst_offset, p, &p);
1401 } else {
1402 // FIXME:
1403 *p ++ = DW_OP_reg0;
1404 }
1405
1406 *endp = p;
1407 }
1408
1409 static void
1410 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1411 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1412 guint8 *expr, guint32 expr_len)
1413 {
1414 char label [128];
1415
1416 emit_push_section (w, ".debug_loc", 0);
1417 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1418 emit_label (w, label);
1419
1420 emit_pointer_value (w, loclist_begin_addr);
1421 emit_pointer_value (w, loclist_end_addr);
1422 emit_byte (w, expr_len % 256);
1423 emit_byte (w, expr_len / 256);
1424 emit_bytes (w, expr, expr_len);
1425
1426 emit_pointer_value (w, NULL);
1427 emit_pointer_value (w, NULL);
1428
1429 emit_pop_section (w);
1430 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1431 }
1432
1433 /*
1434 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1435 * it is a public header.
1436 */
1437 static const guint8 *token_handler_ip;
1438
1439 static char*
1440 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1441 {
1442 char *res, *desc;
1443 MonoMethod *cmethod;
1444 MonoClass *klass;
1445 MonoClassField *field;
1446 gpointer data = NULL;
1447
1448 if (method->wrapper_type)
1449 data = mono_method_get_wrapper_data (method, token);
1450
1451 switch (*token_handler_ip) {
1452 case CEE_ISINST:
1453 case CEE_CASTCLASS:
1454 case CEE_LDELEMA:
1455 if (method->wrapper_type)
1456 klass = data;
1457 else
1458 klass = mono_class_get_full (method->klass->image, token, NULL);
1459 res = g_strdup_printf ("<%s>", klass->name);
1460 break;
1461 case CEE_NEWOBJ:
1462 case CEE_CALL:
1463 case CEE_CALLVIRT:
1464 if (method->wrapper_type)
1465 cmethod = data;
1466 else
1467 cmethod = mono_get_method_full (method->klass->image, token, NULL, NULL);
1468 desc = mono_method_full_name (cmethod, TRUE);
1469 res = g_strdup_printf ("<%s>", desc);
1470 g_free (desc);
1471 break;
1472 case CEE_CALLI:
1473 if (method->wrapper_type) {
1474 desc = mono_signature_get_desc (data, FALSE);
1475 res = g_strdup_printf ("<%s>", desc);
1476 g_free (desc);
1477 } else {
1478 res = g_strdup_printf ("<0x%08x>", token);
1479 }
1480 break;
1481 case CEE_LDFLD:
1482 case CEE_LDSFLD:
1483 case CEE_STFLD:
1484 case CEE_STSFLD:
1485 if (method->wrapper_type)
1486 field = data;
1487 else
1488 field = mono_field_from_token (method->klass->image, token, &klass, NULL);
1489 desc = mono_field_full_name (field);
1490 res = g_strdup_printf ("<%s>", desc);
1491 g_free (desc);
1492 break;
1493 default:
1494 res = g_strdup_printf ("<0x%08x>", token);
1495 break;
1496 }
1497
1498 return res;
1499 }
1500
1501 /*
1502 * disasm_ins:
1503 *
1504 * Produce a disassembled form of the IL instruction at IP. This is an extension
1505 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1506 * CEE_MONO_ opcodes.
1507 */
1508 static char*
1509 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1510 {
1511 char *dis;
1512 MonoDisHelper dh;
1513 MonoMethodHeader *header = mono_method_get_header (method);
1514
1515 memset (&dh, 0, sizeof (dh));
1516 dh.newline = "";
1517 dh.label_format = "IL_%04x: ";
1518 dh.label_target = "IL_%04x";
1519 dh.tokener = token_handler;
1520
1521 token_handler_ip = ip;
1522 if (*ip == MONO_CUSTOM_PREFIX) {
1523 guint32 token;
1524 gpointer data;
1525
1526 switch (ip [1]) {
1527 case CEE_MONO_ICALL: {
1528 MonoJitICallInfo *info;
1529
1530 token = read32 (ip + 2);
1531 data = mono_method_get_wrapper_data (method, token);
1532 info = mono_find_jit_icall_by_addr (data);
1533 g_assert (info);
1534
1535 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1536 ip += 6;
1537 break;
1538 }
1539 case CEE_MONO_CLASSCONST: {
1540 token = read32 (ip + 2);
1541 data = mono_method_get_wrapper_data (method, token);
1542
1543 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1544 ip += 6;
1545 break;
1546 }
1547 default:
1548 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1549 }
1550 } else {
1551 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1552 }
1553 token_handler_ip = NULL;
1554
1555 *endip = ip;
1556 mono_metadata_free_mh (header);
1557 return dis;
1558 }
1559
1560 static gint32
1561 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1562 guint32 native_offset)
1563 {
1564 int i;
1565
1566 if (!jit->line_numbers)
1567 return -1;
1568
1569 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1570 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1571
1572 if (lne.native_offset <= native_offset)
1573 return lne.il_offset;
1574 }
1575
1576 return -1;
1577 }
1578
1579 static int max_special_addr_diff = 0;
1580
1581 static inline void
1582 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1583 {
1584 gint64 opcode = 0;
1585
1586 /* Use a special opcode if possible */
1587 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1588 if (max_special_addr_diff == 0)
1589 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1590
1591 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1592 emit_byte (w, DW_LNS_const_add_pc);
1593 addr_diff -= max_special_addr_diff;
1594 }
1595
1596 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1597 if (opcode > 255)
1598 opcode = 0;
1599 }
1600
1601 if (opcode != 0) {
1602 emit_byte (w, opcode);
1603 } else {
1604 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1605 emit_byte (w, DW_LNS_advance_line);
1606 emit_sleb128 (w, line_diff);
1607 emit_byte (w, DW_LNS_advance_pc);
1608 emit_sleb128 (w, addr_diff);
1609 emit_byte (w, DW_LNS_copy);
1610 }
1611 }
1612
1613 static gint
1614 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1615 {
1616 if (a->native_offset == b->native_offset)
1617 return a->il_offset - b->il_offset;
1618 else
1619 return a->native_offset - b->native_offset;
1620 }
1621
1622 static void
1623 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1624 char *start_symbol, char *end_symbol,
1625 guint8 *code, guint32 code_size,
1626 MonoDebugMethodJitInfo *debug_info)
1627 {
1628 guint32 prev_line = 0;
1629 guint32 prev_native_offset = 0;
1630 int i, file_index, il_offset, prev_il_offset;
1631 gboolean first = TRUE;
1632 MonoDebugSourceLocation *loc;
1633 char *prev_file_name = NULL;
1634 MonoMethodHeader *header = mono_method_get_header (method);
1635 MonoDebugMethodInfo *minfo;
1636 MonoDebugLineNumberEntry *ln_array;
1637 int *native_to_il_offset = NULL;
1638
1639 if (!w->emit_line) {
1640 mono_metadata_free_mh (header);
1641 return;
1642 }
1643
1644 minfo = mono_debug_lookup_method (method);
1645
1646 /* Compute the native->IL offset mapping */
1647
1648 g_assert (code_size);
1649
1650 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1651 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1652
1653 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
1654
1655 native_to_il_offset = g_new0 (int, code_size + 1);
1656
1657 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1658 int j;
1659 MonoDebugLineNumberEntry *lne = &ln_array [i];
1660
1661 if (i == 0) {
1662 for (j = 0; j < lne->native_offset; ++j)
1663 native_to_il_offset [j] = -1;
1664 }
1665
1666 if (i < debug_info->num_line_numbers - 1) {
1667 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1668
1669 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1670 native_to_il_offset [j] = lne->il_offset;
1671 } else {
1672 for (j = lne->native_offset; j < code_size; ++j)
1673 native_to_il_offset [j] = lne->il_offset;
1674 }
1675 }
1676 g_free (ln_array);
1677
1678 prev_line = 1;
1679 prev_il_offset = -1;
1680
1681 for (i = 0; i < code_size; ++i) {
1682 int line_diff, addr_diff;
1683
1684 if (!minfo)
1685 continue;
1686
1687 if (!debug_info->line_numbers)
1688 continue;
1689
1690 if (native_to_il_offset)
1691 il_offset = native_to_il_offset [i];
1692 else
1693 il_offset = il_offset_from_address (method, debug_info, i);
1694 /*
1695 il_offset = il_offset_from_address (method, debug_info, i);
1696
1697 g_assert (il_offset == native_to_il_offset [i]);
1698 */
1699
1700 il_offset = native_to_il_offset [i];
1701 if (il_offset < 0)
1702 continue;
1703
1704 if (il_offset == prev_il_offset)
1705 continue;
1706
1707 prev_il_offset = il_offset;
1708
1709 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1710 if (!(loc && loc->source_file))
1711 continue;
1712
1713 line_diff = (gint32)loc->row - (gint32)prev_line;
1714 addr_diff = i - prev_native_offset;
1715
1716 if (first) {
1717 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1718
1719 emit_byte (w, 0);
1720 emit_byte (w, sizeof (gpointer) + 1);
1721 emit_byte (w, DW_LNE_set_address);
1722 if (start_symbol)
1723 emit_pointer_unaligned (w, start_symbol);
1724 else
1725 emit_pointer_value (w, code);
1726
1727 /*
1728 * The prolog+initlocals region does not have a line number, this
1729 * makes them belong to the first line of the method.
1730 */
1731 emit_byte (w, DW_LNS_advance_line);
1732 //printf ("FIRST: %d %d %d\n", prev_line, loc->row, il_offset);
1733 emit_sleb128 (w, (gint32)loc->row - (gint32)prev_line);
1734 prev_line = loc->row;
1735 first = FALSE;
1736 }
1737
1738 if (loc->row != prev_line) {
1739 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1740 /* Add an entry to the file table */
1741 /* FIXME: Avoid duplicates */
1742 if (w->collect_line_info)
1743 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1744 else
1745 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1746 g_free (prev_file_name);
1747 prev_file_name = g_strdup (loc->source_file);
1748
1749 if (w->cur_file_index != file_index) {
1750 emit_byte (w, DW_LNS_set_file);
1751 emit_uleb128 (w, file_index);
1752 emit_byte (w, DW_LNS_copy);
1753 w->cur_file_index = file_index;
1754 }
1755 }
1756 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1757 emit_advance_op (w, line_diff, addr_diff);
1758
1759 prev_line = loc->row;
1760 prev_native_offset = i;
1761 }
1762
1763 mono_debug_symfile_free_location (loc);
1764 }
1765
1766 g_free (native_to_il_offset);
1767 g_free (prev_file_name);
1768
1769 if (!first) {
1770 emit_byte (w, DW_LNS_advance_pc);
1771 emit_sleb128 (w, code_size - prev_native_offset);
1772 emit_byte (w, DW_LNS_copy);
1773
1774 emit_byte (w, 0);
1775 emit_byte (w, 1);
1776 emit_byte (w, DW_LNE_end_sequence);
1777 } else if (!start_symbol) {
1778 /* No debug info, XDEBUG mode */
1779 char *name, *dis;
1780 const guint8 *ip = header->code;
1781 int prev_line, prev_native_offset;
1782 int *il_to_line;
1783
1784 /*
1785 * Emit the IL code into a temporary file and emit line number info
1786 * referencing that file.
1787 */
1788
1789 name = mono_method_full_name (method, TRUE);
1790 fprintf (w->il_file, "// %s\n", name);
1791 w->il_file_line_index ++;
1792 g_free (name);
1793
1794 il_to_line = g_new0 (int, header->code_size);
1795
1796 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1797 emit_byte (w, 0);
1798 emit_byte (w, sizeof (gpointer) + 1);
1799 emit_byte (w, DW_LNE_set_address);
1800 emit_pointer_value (w, code);
1801
1802 // FIXME: Optimize this
1803 while (ip < header->code + header->code_size) {
1804 int il_offset = ip - header->code;
1805
1806 /* Emit IL */
1807 w->il_file_line_index ++;
1808
1809 dis = disasm_ins (method, ip, &ip);
1810 fprintf (w->il_file, "%s\n", dis);
1811 g_free (dis);
1812
1813 il_to_line [il_offset] = w->il_file_line_index;
1814 }
1815
1816 /* Emit line number info */
1817 prev_line = 1;
1818 prev_native_offset = 0;
1819 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1820 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1821 int line;
1822
1823 if (lne->il_offset >= header->code_size)
1824 continue;
1825 line = il_to_line [lne->il_offset];
1826 if (!line) {
1827 /*
1828 * This seems to happen randomly, it looks like il_offset points
1829 * into the middle of an instruction.
1830 */
1831 continue;
1832 /*
1833 printf ("%s\n", mono_method_full_name (method, TRUE));
1834 printf ("%d %d\n", lne->il_offset, header->code_size);
1835 g_assert (line);
1836 */
1837 }
1838
1839 if (line - prev_line != 0) {
1840 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1841
1842 prev_line = line;
1843 prev_native_offset = lne->native_offset;
1844 }
1845 }
1846
1847 emit_byte (w, DW_LNS_advance_pc);
1848 emit_sleb128 (w, code_size - prev_native_offset);
1849 emit_byte (w, DW_LNS_copy);
1850
1851 emit_byte (w, 0);
1852 emit_byte (w, 1);
1853 emit_byte (w, DW_LNE_end_sequence);
1854
1855 fflush (w->il_file);
1856 g_free (il_to_line);
1857 }
1858 mono_metadata_free_mh (header);
1859 }
1860
1861 static MonoMethodVar*
1862 find_vmv (MonoCompile *cfg, MonoInst *ins)
1863 {
1864 int j;
1865
1866 if (cfg->varinfo) {
1867 for (j = 0; j < cfg->num_varinfo; ++j) {
1868 if (cfg->varinfo [j] == ins)
1869 break;
1870 }
1871
1872 if (j < cfg->num_varinfo) {
1873 return MONO_VARINFO (cfg, j);
1874 }
1875 }
1876
1877 return NULL;
1878 }
1879
1880 void
1881 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)
1882 {
1883 char *name;
1884 MonoMethodSignature *sig;
1885 MonoMethodHeader *header;
1886 char **names;
1887 MonoDebugLocalsInfo *locals_info;
1888 int i;
1889 guint8 buf [128];
1890 guint8 *p;
1891
1892 emit_section_change (w, ".debug_info", 0);
1893
1894 sig = mono_method_signature (method);
1895 header = mono_method_get_header (method);
1896
1897 /* Parameter types */
1898 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1899 MonoType *t;
1900
1901 if (i == 0 && sig->hasthis) {
1902 if (method->klass->valuetype)
1903 t = &method->klass->this_arg;
1904 else
1905 t = &method->klass->byval_arg;
1906 } else {
1907 t = sig->params [i - sig->hasthis];
1908 }
1909
1910 emit_type (w, t);
1911 }
1912 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1913
1914 /* Local types */
1915 for (i = 0; i < header->num_locals; ++i) {
1916 emit_type (w, header->locals [i]);
1917 }
1918
1919 /* Subprogram */
1920 names = g_new0 (char *, sig->param_count);
1921 mono_method_get_param_names (method, (const char **) names);
1922
1923 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1924 name = mono_method_full_name (method, FALSE);
1925 emit_string (w, name);
1926 #ifndef TARGET_IOS
1927 emit_string (w, name);
1928 #endif
1929 g_free (name);
1930 if (start_symbol) {
1931 emit_pointer_unaligned (w, start_symbol);
1932 emit_pointer_unaligned (w, end_symbol);
1933 } else {
1934 emit_pointer_value (w, code);
1935 emit_pointer_value (w, code + code_size);
1936 }
1937 /* frame_base */
1938 emit_byte (w, 2);
1939 emit_byte (w, DW_OP_breg6);
1940 emit_byte (w, 16);
1941
1942 /* Parameters */
1943 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1944 MonoInst *arg = args ? args [i] : NULL;
1945 MonoType *t;
1946 const char *pname;
1947 char pname_buf [128];
1948 MonoMethodVar *vmv = NULL;
1949 gboolean need_loclist = FALSE;
1950
1951 vmv = find_vmv (cfg, arg);
1952 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1953 need_loclist = TRUE;
1954
1955 if (i == 0 && sig->hasthis) {
1956 if (method->klass->valuetype)
1957 t = &method->klass->this_arg;
1958 else
1959 t = &method->klass->byval_arg;
1960 pname = "this";
1961 } else {
1962 t = sig->params [i - sig->hasthis];
1963 pname = names [i - sig->hasthis];
1964 }
1965
1966 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1967 /* name */
1968 if (pname[0] == '\0') {
1969 sprintf (pname_buf, "param%d", i - sig->hasthis);
1970 pname = pname_buf;
1971 }
1972 emit_string (w, pname);
1973 /* type */
1974 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1975 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1976 else
1977 emit_var_type (w, t);
1978
1979 p = buf;
1980 encode_var_location (w, arg, p, &p);
1981 if (need_loclist) {
1982 vmv->live_range_start = 0;
1983 if (vmv->live_range_end == 0)
1984 /* FIXME: Uses made in calls are not recorded */
1985 vmv->live_range_end = code_size;
1986 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1987 } else {
1988 emit_byte (w, p - buf);
1989 emit_bytes (w, buf, p - buf);
1990 }
1991 }
1992 g_free (names);
1993
1994 /* Locals */
1995 locals_info = mono_debug_lookup_locals (method);
1996
1997 for (i = 0; i < header->num_locals; ++i) {
1998 MonoInst *ins = locals [i];
1999 char name_buf [128];
2000 int j;
2001 MonoMethodVar *vmv = NULL;
2002 gboolean need_loclist = FALSE;
2003 char *lname;
2004
2005 /* ins->dreg no longer contains the original vreg */
2006 vmv = find_vmv (cfg, ins);
2007 if (code && vmv) {
2008 if (vmv->live_range_start) {
2009 /* This variable has a precise live range */
2010 need_loclist = TRUE;
2011 }
2012 }
2013
2014 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
2015 /* name */
2016 lname = NULL;
2017 if (locals_info) {
2018 for (j = 0; j < locals_info->num_locals; ++j)
2019 if (locals_info->locals [j].index == i)
2020 break;
2021 if (j < locals_info->num_locals)
2022 lname = locals_info->locals [j].name;
2023 }
2024 if (lname) {
2025 emit_string (w, lname);
2026 } else {
2027 sprintf (name_buf, "V_%d", i);
2028 emit_string (w, name_buf);
2029 }
2030 /* type */
2031 if (!ins || ins->flags & MONO_INST_IS_DEAD)
2032 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
2033 else
2034 emit_var_type (w, header->locals [i]);
2035
2036 p = buf;
2037 encode_var_location (w, ins, p, &p);
2038
2039 if (need_loclist) {
2040 if (vmv->live_range_end == 0)
2041 /* FIXME: Uses made in calls are not recorded */
2042 vmv->live_range_end = code_size;
2043 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
2044 } else {
2045 emit_byte (w, p - buf);
2046 emit_bytes (w, buf, p - buf);
2047 }
2048 }
2049
2050 if (locals_info)
2051 mono_debug_symfile_free_locals (locals_info);
2052
2053 /* Subprogram end */
2054 emit_uleb128 (w, 0x0);
2055
2056 emit_line (w);
2057
2058 emit_debug_info_end (w);
2059
2060 /* Emit unwind info */
2061 if (unwind_info) {
2062 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
2063 w->fde_index ++;
2064 }
2065
2066 /* Emit line number info */
2067 /* != could happen when using --regression */
2068 if (debug_info && (debug_info->code_start == code)) {
2069 if (w->collect_line_info) {
2070 MethodLineNumberInfo *info;
2071
2072 /* Save the information needed to emit the line number info later at once */
2073 info = g_new0 (MethodLineNumberInfo, 1);
2074 info->method = method;
2075 info->start_symbol = g_strdup (start_symbol);
2076 info->end_symbol = g_strdup (end_symbol);
2077 info->code = code;
2078 info->code_size = code_size;
2079 info->debug_info = debug_info;
2080 w->line_info = g_slist_prepend (w->line_info, info);
2081 } else {
2082 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
2083 }
2084 }
2085
2086 emit_line (w);
2087 mono_metadata_free_mh (header);
2088 }
2089
2090 void
2091 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)
2092 {
2093 emit_section_change (w, ".debug_info", 0);
2094
2095 /* Subprogram */
2096 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
2097 emit_string (w, tramp_name);
2098 emit_pointer_value (w, code);
2099 emit_pointer_value (w, code + code_size);
2100
2101 /* Subprogram end */
2102 emit_uleb128 (w, 0x0);
2103
2104 emit_debug_info_end (w);
2105
2106 /* Emit unwind info */
2107 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2108 w->fde_index ++;
2109 }
2110 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
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