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[mono-api-info] Use XmlWriter instead of XmlDocument to make this faster.
[mono-project.git] / mono / mini / dwarfwriter.c
blobf925ccf3f9cf70a93197d7850d65cc1c18785d50
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/metadata/mono-debug-debugger.h>
25 #include <mono/utils/mono-compiler.h>
26
27 #ifndef HOST_WIN32
28 #include <mono/utils/freebsd-elf32.h>
29 #include <mono/utils/freebsd-elf64.h>
30 #endif
31
32 #include <mono/utils/freebsd-dwarf.h>
33
34 #define DW_AT_MIPS_linkage_name 0x2007
35 #define DW_LNE_set_prologue_end 0x0a
36
37 typedef struct {
38 MonoMethod *method;
39 char *start_symbol, *end_symbol;
40 guint8 *code;
41 guint32 code_size;
42 } MethodLineNumberInfo;
43
44 struct _MonoDwarfWriter
45 {
46 MonoImageWriter *w;
47 GHashTable *class_to_die, *class_to_vtype_die, *class_to_pointer_die;
48 GHashTable *class_to_reference_die;
49 int fde_index, tdie_index, line_number_file_index, line_number_dir_index;
50 GHashTable *file_to_index, *index_to_file, *dir_to_index;
51 FILE *il_file;
52 int il_file_line_index, loclist_index;
53 GSList *cie_program;
54 FILE *fp;
55 const char *temp_prefix;
56 gboolean emit_line, appending, collect_line_info;
57 GSList *line_info;
58 int cur_file_index;
59 };
60
61 static void
62 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
63 char *start_symbol, char *end_symbol,
64 guint8 *code, guint32 code_size,
65 MonoDebugMethodJitInfo *debug_info);
66
67 /*
68 * mono_dwarf_writer_create:
69 *
70 * Create a DWARF writer object. WRITER is the underlying image writer this
71 * writer will emit to. IL_FILE is the file where IL code will be dumped to for
72 * methods which have no line number info. It can be NULL.
73 * If APPENDING is TRUE, the output file will be in assembleable state after each
74 * call to the _emit_ functions. This is used for XDEBUG. If APPENDING is FALSE,
75 * a separate mono_dwarf_writer_close () call is needed to finish the emission of
76 * debug information.
77 */
78 MonoDwarfWriter*
79 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean appending, gboolean emit_line_numbers)
80 {
81 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
82
83 /*
84 * The appending flag is needed because we use subsections to order things in
85 * the debug info, and:
86 * - apple's assembler doesn't support them
87 * - the binary writer has problems with subsections+alignment
88 * So instead of subsections, we use the _close () function in AOT mode,
89 * which writes out things in order.
90 */
91
92 w->w = writer;
93 w->il_file = il_file;
94 w->il_file_line_index = il_file_start_line;
95 w->appending = appending;
96
97 if (appending)
98 g_assert (mono_img_writer_subsections_supported (w->w));
99
100 w->emit_line = TRUE;
101
102 if (appending) {
103 if (!mono_img_writer_subsections_supported (w->w))
104 /* Can't emit line number info without subsections */
105 w->emit_line = FALSE;
106 } else {
107 /* Collect line number info and emit it at once */
108 w->collect_line_info = TRUE;
109 }
110
111 if (!emit_line_numbers) {
112 w->emit_line = FALSE;
113 w->collect_line_info = FALSE;
114 }
115
116 w->fp = mono_img_writer_get_fp (w->w);
117 w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
118
119 w->class_to_die = g_hash_table_new (NULL, NULL);
120 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
121 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
122 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
123 w->cur_file_index = -1;
124
125 return w;
126 }
127
128 void
129 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
130 {
131 g_free (w);
132 }
133
134 int
135 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
136 {
137 return w->il_file_line_index;
138 }
139
140 /* Wrappers around the image writer functions */
141
142 static inline void
143 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
144 {
145 mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
146 }
147
148 static inline void
149 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
150 {
151 mono_img_writer_emit_push_section (w->w, section_name, subsection);
152 }
153
154 static inline void
155 emit_pop_section (MonoDwarfWriter *w)
156 {
157 mono_img_writer_emit_pop_section (w->w);
158 }
159
160 static inline void
161 emit_label (MonoDwarfWriter *w, const char *name)
162 {
163 mono_img_writer_emit_label (w->w, name);
164 }
165
166 static inline void
167 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
168 {
169 mono_img_writer_emit_bytes (w->w, buf, size);
170 }
171
172 static inline void
173 emit_string (MonoDwarfWriter *w, const char *value)
174 {
175 mono_img_writer_emit_string (w->w, value);
176 }
177
178 static inline void
179 emit_line (MonoDwarfWriter *w)
180 {
181 mono_img_writer_emit_line (w->w);
182 }
183
184 static inline void
185 emit_alignment (MonoDwarfWriter *w, int size)
186 {
187 mono_img_writer_emit_alignment (w->w, size);
188 }
189
190 static inline void
191 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
192 {
193 mono_img_writer_emit_pointer_unaligned (w->w, target);
194 }
195
196 static inline void
197 emit_pointer (MonoDwarfWriter *w, const char *target)
198 {
199 mono_img_writer_emit_pointer (w->w, target);
200 }
201
202 static inline void
203 emit_int16 (MonoDwarfWriter *w, int value)
204 {
205 mono_img_writer_emit_int16 (w->w, value);
206 }
207
208 static inline void
209 emit_int32 (MonoDwarfWriter *w, int value)
210 {
211 mono_img_writer_emit_int32 (w->w, value);
212 }
213
214 static inline void
215 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
216 {
217 mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
218 }
219
220 static inline void
221 emit_byte (MonoDwarfWriter *w, guint8 val)
222 {
223 mono_img_writer_emit_byte (w->w, val);
224 }
225
226 static void
227 emit_escaped_string (MonoDwarfWriter *w, char *value)
228 {
229 int i, len;
230
231 len = strlen (value);
232 for (i = 0; i < len; ++i) {
233 char c = value [i];
234 if (!(isalnum (c))) {
235 switch (c) {
236 case '_':
237 case '-':
238 case ':':
239 case '.':
240 case ',':
241 case '/':
242 case '<':
243 case '>':
244 case '`':
245 case '(':
246 case ')':
247 case '[':
248 case ']':
249 break;
250 default:
251 value [i] = '_';
252 break;
253 }
254 }
255 }
256 mono_img_writer_emit_string (w->w, value);
257 }
258
259 static G_GNUC_UNUSED void
260 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
261 {
262 do {
263 guint8 b = value & 0x7f;
264 value >>= 7;
265 if (value != 0) /* more bytes to come */
266 b |= 0x80;
267 emit_byte (w, b);
268 } while (value);
269 }
270
271 static G_GNUC_UNUSED void
272 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
273 {
274 gboolean more = 1;
275 gboolean negative = (value < 0);
276 guint32 size = 64;
277 guint8 byte;
278
279 while (more) {
280 byte = value & 0x7f;
281 value >>= 7;
282 /* the following is unnecessary if the
283 * implementation of >>= uses an arithmetic rather
284 * than logical shift for a signed left operand
285 */
286 if (negative)
287 /* sign extend */
288 value |= - ((gint64)1 <<(size - 7));
289 /* sign bit of byte is second high order bit (0x40) */
290 if ((value == 0 && !(byte & 0x40)) ||
291 (value == -1 && (byte & 0x40)))
292 more = 0;
293 else
294 byte |= 0x80;
295 emit_byte (w, byte);
296 }
297 }
298
299 static G_GNUC_UNUSED void
300 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
301 {
302 guint8 *p = buf;
303
304 do {
305 guint8 b = value & 0x7f;
306 value >>= 7;
307 if (value != 0) /* more bytes to come */
308 b |= 0x80;
309 *p ++ = b;
310 } while (value);
311
312 *endbuf = p;
313 }
314
315 static G_GNUC_UNUSED void
316 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
317 {
318 gboolean more = 1;
319 gboolean negative = (value < 0);
320 guint32 size = 32;
321 guint8 byte;
322 guint8 *p = buf;
323
324 while (more) {
325 byte = value & 0x7f;
326 value >>= 7;
327 /* the following is unnecessary if the
328 * implementation of >>= uses an arithmetic rather
329 * than logical shift for a signed left operand
330 */
331 if (negative)
332 /* sign extend */
333 value |= - (1 <<(size - 7));
334 /* sign bit of byte is second high order bit (0x40) */
335 if ((value == 0 && !(byte & 0x40)) ||
336 (value == -1 && (byte & 0x40)))
337 more = 0;
338 else
339 byte |= 0x80;
340 *p ++= byte;
341 }
342
343 *endbuf = p;
344 }
345
346 static void
347 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
348 int *attrs, int attrs_len)
349 {
350 int i;
351
352 emit_uleb128 (w, code);
353 emit_uleb128 (w, tag);
354 emit_byte (w, has_child);
355
356 for (i = 0; i < attrs_len; i++)
357 emit_uleb128 (w, attrs [i]);
358 emit_uleb128 (w, 0);
359 emit_uleb128 (w, 0);
360 }
361
362 static void
363 emit_cie (MonoDwarfWriter *w)
364 {
365 emit_section_change (w, ".debug_frame", 0);
366
367 emit_alignment (w, 8);
368
369 /* Emit a CIE */
370 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
371 emit_label (w, ".Lcie0_start");
372 emit_int32 (w, 0xffffffff); /* CIE id */
373 emit_byte (w, 3); /* version */
374 emit_string (w, ""); /* augmention */
375 emit_sleb128 (w, 1); /* code alignment factor */
376 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
377 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
378
379 w->cie_program = w->cie_program;
380 if (w->cie_program) {
381 guint32 uw_info_len;
382 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
383 emit_bytes (w, uw_info, uw_info_len);
384 g_free (uw_info);
385 }
386
387 emit_alignment (w, sizeof (gpointer));
388 emit_label (w, ".Lcie0_end");
389 }
390
391 static void
392 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
393 {
394 gssize val = (gssize)ptr;
395 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
396 }
397
398 static void
399 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
400 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
401 {
402 char symbol1 [128];
403 char symbol2 [128];
404 GSList *l;
405 guint8 *uw_info;
406 guint32 uw_info_len;
407
408 emit_section_change (w, ".debug_frame", 0);
409
410 sprintf (symbol1, ".Lfde%d_start", fde_index);
411 sprintf (symbol2, ".Lfde%d_end", fde_index);
412 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
413 emit_label (w, symbol1);
414 emit_int32 (w, 0); /* CIE_pointer */
415 if (start_symbol) {
416 emit_pointer (w, start_symbol); /* initial_location */
417 if (end_symbol)
418 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
419 else {
420 g_assert (code_size);
421 emit_int32 (w, code_size);
422 }
423 } else {
424 emit_pointer_value (w, code);
425 emit_int32 (w, code_size);
426 }
427 #if SIZEOF_VOID_P == 8
428 /* Upper 32 bits of code size */
429 emit_int32 (w, 0);
430 #endif
431
432 l = unwind_ops;
433 if (w->cie_program) {
434 // FIXME: Check that the ops really begin with the CIE program */
435 int i;
436
437 for (i = 0; i < g_slist_length (w->cie_program); ++i)
438 if (l)
439 l = l->next;
440 }
441
442 /* Convert the list of MonoUnwindOps to the format used by DWARF */
443 uw_info = mono_unwind_ops_encode_full (l, &uw_info_len, FALSE);
444 emit_bytes (w, uw_info, uw_info_len);
445 g_free (uw_info);
446
447 emit_alignment (w, sizeof (mgreg_t));
448 emit_label (w, symbol2);
449 }
450
451 /* Abbrevations */
452 #define ABBREV_COMPILE_UNIT 1
453 #define ABBREV_SUBPROGRAM 2
454 #define ABBREV_PARAM 3
455 #define ABBREV_BASE_TYPE 4
456 #define ABBREV_STRUCT_TYPE 5
457 #define ABBREV_DATA_MEMBER 6
458 #define ABBREV_TYPEDEF 7
459 #define ABBREV_ENUM_TYPE 8
460 #define ABBREV_ENUMERATOR 9
461 #define ABBREV_NAMESPACE 10
462 #define ABBREV_VARIABLE 11
463 #define ABBREV_VARIABLE_LOCLIST 12
464 #define ABBREV_POINTER_TYPE 13
465 #define ABBREV_REFERENCE_TYPE 14
466 #define ABBREV_PARAM_LOCLIST 15
467 #define ABBREV_INHERITANCE 16
468 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
469 #define ABBREV_TRAMP_SUBPROGRAM 18
470
471 static int compile_unit_attr [] = {
472 DW_AT_producer ,DW_FORM_string,
473 DW_AT_name ,DW_FORM_string,
474 DW_AT_comp_dir ,DW_FORM_string,
475 DW_AT_language ,DW_FORM_data1,
476 DW_AT_low_pc ,DW_FORM_addr,
477 DW_AT_high_pc ,DW_FORM_addr,
478 DW_AT_stmt_list ,DW_FORM_data4
479 };
480
481 static int subprogram_attr [] = {
482 DW_AT_name , DW_FORM_string,
483 DW_AT_MIPS_linkage_name, DW_FORM_string,
484 DW_AT_decl_file , DW_FORM_udata,
485 DW_AT_decl_line , DW_FORM_udata,
486 #ifndef TARGET_IOS
487 DW_AT_description , DW_FORM_string,
488 #endif
489 DW_AT_low_pc , DW_FORM_addr,
490 DW_AT_high_pc , DW_FORM_addr,
491 DW_AT_frame_base , DW_FORM_block1
492 };
493
494 static int tramp_subprogram_attr [] = {
495 DW_AT_name , DW_FORM_string,
496 DW_AT_low_pc , DW_FORM_addr,
497 DW_AT_high_pc , DW_FORM_addr,
498 };
499
500 static int param_attr [] = {
501 DW_AT_name, DW_FORM_string,
502 DW_AT_type, DW_FORM_ref4,
503 DW_AT_location, DW_FORM_block1
504 };
505
506 static int param_loclist_attr [] = {
507 DW_AT_name, DW_FORM_string,
508 DW_AT_type, DW_FORM_ref4,
509 DW_AT_location, DW_FORM_data4
510 };
511
512 static int base_type_attr [] = {
513 DW_AT_byte_size, DW_FORM_data1,
514 DW_AT_encoding, DW_FORM_data1,
515 DW_AT_name, DW_FORM_string
516 };
517
518 static int struct_type_attr [] = {
519 DW_AT_name, DW_FORM_string,
520 DW_AT_byte_size, DW_FORM_udata,
521 };
522
523 static int data_member_attr [] = {
524 DW_AT_name, DW_FORM_string,
525 DW_AT_type, DW_FORM_ref4,
526 DW_AT_data_member_location, DW_FORM_block1
527 };
528
529 static int typedef_attr [] = {
530 DW_AT_name, DW_FORM_string,
531 DW_AT_type, DW_FORM_ref4
532 };
533
534 static int pointer_type_attr [] = {
535 DW_AT_type, DW_FORM_ref4,
536 };
537
538 static int reference_type_attr [] = {
539 DW_AT_type, DW_FORM_ref4,
540 };
541
542 static int enum_type_attr [] = {
543 DW_AT_name, DW_FORM_string,
544 DW_AT_byte_size, DW_FORM_udata,
545 DW_AT_type, DW_FORM_ref4,
546 };
547
548 static int enumerator_attr [] = {
549 DW_AT_name, DW_FORM_string,
550 DW_AT_const_value, DW_FORM_sdata,
551 };
552
553 static int namespace_attr [] = {
554 DW_AT_name, DW_FORM_string,
555 };
556
557 static int variable_attr [] = {
558 DW_AT_name, DW_FORM_string,
559 DW_AT_type, DW_FORM_ref4,
560 DW_AT_location, DW_FORM_block1
561 };
562
563 static int variable_loclist_attr [] = {
564 DW_AT_name, DW_FORM_string,
565 DW_AT_type, DW_FORM_ref4,
566 DW_AT_location, DW_FORM_data4
567 };
568
569 static int inheritance_attr [] = {
570 DW_AT_type, DW_FORM_ref4,
571 DW_AT_data_member_location, DW_FORM_block1
572 };
573
574 typedef struct DwarfBasicType {
575 const char *die_name, *name;
576 int type;
577 int size;
578 int encoding;
579 } DwarfBasicType;
580
581 static DwarfBasicType basic_types [] = {
582 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
583 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
584 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
585 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
586 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
587 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
588 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
589 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
590 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
591 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
592 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
593 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
594 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
595 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
596 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
597 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
598 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
599 };
600
601 /* Constants for encoding line number special opcodes */
602 #define OPCODE_BASE 13
603 #define LINE_BASE -5
604 #define LINE_RANGE 14
605
606 /* Subsections of the .debug_line section */
607 #define LINE_SUBSECTION_HEADER 1
608 #define LINE_SUBSECTION_INCLUDES 2
609 #define LINE_SUBSECTION_FILES 3
610 #define LINE_SUBSECTION_DATA 4
611 #define LINE_SUBSECTION_END 5
612
613 static int
614 emit_line_number_file_name (MonoDwarfWriter *w, const char *name,
615 gint64 last_mod_time, gint64 file_size)
616 {
617 int index;
618 int dir_index;
619 char *basename = NULL;
620
621 if (!w->file_to_index)
622 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
623
624 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
625 if (index > 0)
626 return index;
627
628 if (g_path_is_absolute (name)) {
629 char *dir = g_path_get_dirname (name);
630
631 if (!w->dir_to_index)
632 w->dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
633
634 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (w->dir_to_index, dir));
635 if (dir_index == 0) {
636 emit_section_change (w, ".debug_line", LINE_SUBSECTION_INCLUDES);
637 emit_string (w, dir);
638
639 dir_index = ++ w->line_number_dir_index;
640 g_hash_table_insert (w->dir_to_index, g_strdup (dir), GUINT_TO_POINTER (dir_index));
641 }
642
643 g_free (dir);
644
645 basename = g_path_get_basename (name);
646 } else {
647 dir_index = 0;
648 }
649
650 emit_section_change (w, ".debug_line", LINE_SUBSECTION_FILES);
651
652 if (basename)
653 emit_string (w, basename);
654 else
655 emit_string (w, name);
656 emit_uleb128 (w, dir_index);
657 emit_byte (w, 0);
658 emit_byte (w, 0);
659
660 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
661
662 if (basename)
663 g_free (basename);
664
665 index = ++ w->line_number_file_index;
666 g_hash_table_insert (w->file_to_index, g_strdup (name), GUINT_TO_POINTER (index));
667
668 return index;
669 }
670
671 static int
672 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
673 {
674 int index;
675
676 g_assert (w->file_to_index);
677 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
678 g_assert (index > 0);
679 return index - 1;
680 }
681
682 static int
683 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
684 gint64 last_mod_time, gint64 file_size)
685 {
686 int index;
687 char *copy;
688
689 if (!w->file_to_index) {
690 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
691 w->index_to_file = g_hash_table_new (NULL, NULL);
692 }
693
694 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
695 if (index > 0)
696 return index - 1;
697 index = w->line_number_file_index;
698 w->line_number_file_index ++;
699 copy = g_strdup (name);
700 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
701 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
702
703 return index;
704 }
705
706 char *
707 mono_dwarf_escape_path (const char *name)
708 {
709 if (strchr (name, '\\')) {
710 char *s;
711 int len, i, j;
712
713 len = strlen (name);
714 s = (char *)g_malloc0 ((len + 1) * 2);
715 j = 0;
716 for (i = 0; i < len; ++i) {
717 if (name [i] == '\\') {
718 s [j ++] = '\\';
719 s [j ++] = '\\';
720 } else {
721 s [j ++] = name [i];
722 }
723 }
724 return s;
725 }
726 return g_strdup (name);
727 }
728
729 static void
730 emit_all_line_number_info (MonoDwarfWriter *w)
731 {
732 int i;
733 GHashTable *dir_to_index, *index_to_dir;
734 GSList *l;
735 GSList *info_list;
736
737 g_assert (w->collect_line_info);
738
739 add_line_number_file_name (w, "<unknown>", 0, 0);
740
741 /* Collect files */
742 info_list = g_slist_reverse (w->line_info);
743 for (l = info_list; l; l = l->next) {
744 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
745 MonoDebugMethodInfo *minfo;
746 GPtrArray *source_file_list;
747
748 // FIXME: Free stuff
749 minfo = mono_debug_lookup_method (info->method);
750 if (!minfo)
751 continue;
752
753 mono_debug_get_seq_points (minfo, NULL, &source_file_list, NULL, NULL, NULL);
754 for (i = 0; i < source_file_list->len; ++i) {
755 MonoDebugSourceInfo *sinfo = (MonoDebugSourceInfo *)g_ptr_array_index (source_file_list, i);
756 add_line_number_file_name (w, sinfo->source_file, 0, 0);
757 }
758 }
759
760 /* Preprocess files */
761 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
762 index_to_dir = g_hash_table_new (NULL, NULL);
763 for (i = 0; i < w->line_number_file_index; ++i) {
764 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
765 char *copy;
766 int dir_index = 0;
767
768 if (g_path_is_absolute (name)) {
769 char *dir = g_path_get_dirname (name);
770
771 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
772 if (dir_index == 0) {
773 dir_index = w->line_number_dir_index;
774 w->line_number_dir_index ++;
775 copy = g_strdup (dir);
776 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
777 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
778 } else {
779 dir_index --;
780 }
781
782 g_free (dir);
783 }
784 }
785
786 /* Line number info header */
787 emit_section_change (w, ".debug_line", 0);
788 emit_label (w, ".Ldebug_line_section_start");
789 emit_label (w, ".Ldebug_line_start");
790 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
791 emit_int16 (w, 0x2); /* version */
792 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
793 emit_byte (w, 1); /* minimum_instruction_length */
794 emit_byte (w, 1); /* default_is_stmt */
795 emit_byte (w, LINE_BASE); /* line_base */
796 emit_byte (w, LINE_RANGE); /* line_range */
797 emit_byte (w, OPCODE_BASE); /* opcode_base */
798 emit_byte (w, 0); /* standard_opcode_lengths */
799 emit_byte (w, 1);
800 emit_byte (w, 1);
801 emit_byte (w, 1);
802 emit_byte (w, 1);
803 emit_byte (w, 0);
804 emit_byte (w, 0);
805 emit_byte (w, 0);
806 emit_byte (w, 1);
807 emit_byte (w, 0);
808 emit_byte (w, 0);
809 emit_byte (w, 1);
810
811 /* Includes */
812 emit_section_change (w, ".debug_line", 0);
813 for (i = 0; i < w->line_number_dir_index; ++i) {
814 char *dir = (char *)g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
815
816 emit_string (w, mono_dwarf_escape_path (dir));
817 }
818 /* End of Includes */
819 emit_byte (w, 0);
820
821 /* Files */
822 for (i = 0; i < w->line_number_file_index; ++i) {
823 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
824 char *basename = NULL, *dir;
825 int dir_index = 0;
826
827 if (g_path_is_absolute (name)) {
828 dir = g_path_get_dirname (name);
829
830 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
831 basename = g_path_get_basename (name);
832 }
833
834 if (basename)
835 emit_string (w, basename);
836 else
837 emit_string (w, mono_dwarf_escape_path (name));
838 emit_uleb128 (w, dir_index);
839 emit_byte (w, 0);
840 emit_byte (w, 0);
841 }
842
843 /* End of Files */
844 emit_byte (w, 0);
845
846 emit_label (w, ".Ldebug_line_header_end");
847
848 /* Emit line number table */
849 for (l = info_list; l; l = l->next) {
850 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
851 MonoDebugMethodJitInfo *dmji;
852
853 dmji = mono_debug_find_method (info->method, mono_domain_get ());
854 if (!dmji)
855 continue;
856 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
857 mono_debug_free_method_jit_info (dmji);
858 }
859 g_slist_free (info_list);
860
861 emit_byte (w, 0);
862 emit_byte (w, 1);
863 emit_byte (w, DW_LNE_end_sequence);
864
865 emit_label (w, ".Ldebug_line_end");
866 }
867
868 /*
869 * Some assemblers like apple's do not support subsections, so we can't place
870 * .Ldebug_info_end at the end of the section using subsections. Instead, we
871 * define it every time something gets added to the .debug_info section.
872 * The apple assember seems to use the last definition.
873 */
874 static void
875 emit_debug_info_end (MonoDwarfWriter *w)
876 {
877 /* This doesn't seem to work/required with recent iphone sdk versions */
878 #if 0
879 if (!mono_img_writer_subsections_supported (w->w))
880 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
881 #endif
882 }
883
884 void
885 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
886 {
887 char *s, *build_info;
888 int i;
889
890 w->cie_program = base_unwind_program;
891
892 emit_section_change (w, ".debug_abbrev", 0);
893 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
894 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
895 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
896 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
897 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
898 param_attr, G_N_ELEMENTS (param_attr));
899 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
900 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
901 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
902 base_type_attr, G_N_ELEMENTS (base_type_attr));
903 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
904 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
905 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
906 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
907 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
908 data_member_attr, G_N_ELEMENTS (data_member_attr));
909 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
910 typedef_attr, G_N_ELEMENTS (typedef_attr));
911 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
912 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
913 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
914 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
915 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
916 namespace_attr, G_N_ELEMENTS (namespace_attr));
917 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
918 variable_attr, G_N_ELEMENTS (variable_attr));
919 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
920 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
921 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
922 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
923 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
924 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
925 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
926 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
927 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
928 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
929 emit_byte (w, 0);
930
931 emit_section_change (w, ".debug_info", 0);
932 emit_label (w, ".Ldebug_info_start");
933 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
934 emit_label (w, ".Ldebug_info_begin");
935 emit_int16 (w, 0x2); /* DWARF version 2 */
936 emit_int32 (w, 0); /* .debug_abbrev offset */
937 emit_byte (w, sizeof (gpointer)); /* address size */
938
939 if (mono_img_writer_subsections_supported (w->w) && w->appending) {
940 /* Emit this into a separate section so it gets placed at the end */
941 emit_section_change (w, ".debug_info", 1);
942 emit_byte (w, 0); /* close COMPILE_UNIT */
943 emit_label (w, ".Ldebug_info_end");
944 emit_section_change (w, ".debug_info", 0);
945 }
946
947 /* Compilation unit */
948 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
949 build_info = mono_get_runtime_build_info ();
950 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
951 emit_string (w, s);
952 g_free (build_info);
953 g_free (s);
954 emit_string (w, cu_name);
955 emit_string (w, "");
956 emit_byte (w, DW_LANG_C);
957 emit_pointer_value (w, 0);
958 emit_pointer_value (w, 0);
959 /* offset into .debug_line section */
960 if (w->emit_line)
961 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
962 else
963 emit_pointer_value (w, 0);
964
965 /* Base types */
966 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
967 emit_label (w, basic_types [i].die_name);
968 emit_uleb128 (w, ABBREV_BASE_TYPE);
969 emit_byte (w, basic_types [i].size);
970 emit_byte (w, basic_types [i].encoding);
971 emit_string (w, basic_types [i].name);
972 }
973
974 emit_debug_info_end (w);
975
976 /* debug_loc section */
977 emit_section_change (w, ".debug_loc", 0);
978 emit_label (w, ".Ldebug_loc_start");
979
980 emit_cie (w);
981 }
982
983 /*
984 * mono_dwarf_writer_close:
985 *
986 * Finalize the emitted debugging info.
987 */
988 void
989 mono_dwarf_writer_close (MonoDwarfWriter *w)
990 {
991 if (!w->appending) {
992 emit_section_change (w, ".debug_info", 0);
993 emit_byte (w, 0); /* close COMPILE_UNIT */
994 emit_label (w, ".Ldebug_info_end");
995 }
996
997 if (w->collect_line_info)
998 emit_all_line_number_info (w);
999 }
1000
1001 static void emit_type (MonoDwarfWriter *w, MonoType *t);
1002 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
1003
1004 static const char*
1005 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
1006 {
1007 GHashTable *cache;
1008
1009 if (vtype)
1010 cache = w->class_to_vtype_die;
1011 else
1012 cache = w->class_to_die;
1013
1014 return (const char *)g_hash_table_lookup (cache, klass);
1015 }
1016
1017 /* Returns the local symbol pointing to the emitted debug info */
1018 static char*
1019 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
1020 {
1021 char *die, *pointer_die, *reference_die;
1022 char *full_name, *p;
1023 gpointer iter;
1024 MonoClassField *field;
1025 const char *fdie;
1026 int k;
1027 gboolean emit_namespace = FALSE, has_children;
1028 GHashTable *cache;
1029
1030 if (vtype)
1031 cache = w->class_to_vtype_die;
1032 else
1033 cache = w->class_to_die;
1034
1035 die = (char *)g_hash_table_lookup (cache, klass);
1036 if (die)
1037 return die;
1038
1039 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) ||
1040 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
1041 return NULL;
1042
1043 /*
1044 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
1045 */
1046 /*
1047 if (klass->name_space && klass->name_space [0] != '\0')
1048 emit_namespace = TRUE;
1049 */
1050 if (emit_namespace) {
1051 emit_uleb128 (w, ABBREV_NAMESPACE);
1052 emit_string (w, klass->name_space);
1053 }
1054
1055 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
1056 /*
1057 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
1058 * to separate components.
1059 */
1060 for (p = full_name; *p; p ++)
1061 if (*p == '.')
1062 *p = '_';
1063
1064 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
1065 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
1066 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
1067 w->tdie_index ++;
1068
1069 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
1070 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
1071 g_hash_table_insert (cache, klass, die);
1072
1073 if (klass->enumtype) {
1074 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
1075
1076 emit_label (w, die);
1077
1078 emit_uleb128 (w, ABBREV_ENUM_TYPE);
1079 emit_string (w, full_name);
1080 emit_uleb128 (w, size);
1081 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
1082 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
1083 break;
1084 g_assert (k < G_N_ELEMENTS (basic_types));
1085 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
1086
1087 /* Emit enum values */
1088 iter = NULL;
1089 while ((field = mono_class_get_fields (klass, &iter))) {
1090 const char *p;
1091 MonoTypeEnum def_type;
1092
1093 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC))
1094 continue;
1095 if (mono_field_is_deleted (field))
1096 continue;
1097
1098 emit_uleb128 (w, ABBREV_ENUMERATOR);
1099 emit_string (w, mono_field_get_name (field));
1100
1101 p = mono_class_get_field_default_value (field, &def_type);
1102 /* len = */ mono_metadata_decode_blob_size (p, &p);
1103 switch (mono_class_enum_basetype (klass)->type) {
1104 case MONO_TYPE_U1:
1105 case MONO_TYPE_I1:
1106 case MONO_TYPE_BOOLEAN:
1107 emit_sleb128 (w, *p);
1108 break;
1109 case MONO_TYPE_U2:
1110 case MONO_TYPE_I2:
1111 case MONO_TYPE_CHAR:
1112 emit_sleb128 (w, read16 (p));
1113 break;
1114 case MONO_TYPE_U4:
1115 case MONO_TYPE_I4:
1116 emit_sleb128 (w, read32 (p));
1117 break;
1118 case MONO_TYPE_U8:
1119 case MONO_TYPE_I8:
1120 emit_sleb128 (w, read64 (p));
1121 break;
1122 case MONO_TYPE_I:
1123 case MONO_TYPE_U:
1124 #if SIZEOF_VOID_P == 8
1125 emit_sleb128 (w, read64 (p));
1126 #else
1127 emit_sleb128 (w, read32 (p));
1128 #endif
1129 break;
1130 default:
1131 g_assert_not_reached ();
1132 }
1133 }
1134
1135 has_children = TRUE;
1136 } else {
1137 guint8 buf [128];
1138 guint8 *p;
1139 char *parent_die;
1140
1141 if (klass->parent)
1142 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1143 else
1144 parent_die = NULL;
1145
1146 /* Emit field types */
1147 iter = NULL;
1148 while ((field = mono_class_get_fields (klass, &iter))) {
1149 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1150 continue;
1151
1152 emit_type (w, field->type);
1153 }
1154
1155 iter = NULL;
1156 has_children = parent_die || mono_class_get_fields (klass, &iter);
1157
1158 emit_label (w, die);
1159
1160 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1161 emit_string (w, full_name);
1162 emit_uleb128 (w, klass->instance_size);
1163
1164 if (parent_die) {
1165 emit_uleb128 (w, ABBREV_INHERITANCE);
1166 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1167
1168 p = buf;
1169 *p ++= DW_OP_plus_uconst;
1170 encode_uleb128 (0, p, &p);
1171 emit_byte (w, p - buf);
1172 emit_bytes (w, buf, p - buf);
1173 }
1174
1175 /* Emit fields */
1176 iter = NULL;
1177 while ((field = mono_class_get_fields (klass, &iter))) {
1178 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1179 continue;
1180
1181 fdie = get_type_die (w, field->type);
1182 if (fdie) {
1183 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1184 emit_string (w, field->name);
1185 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1186 /* location */
1187 p = buf;
1188 *p ++= DW_OP_plus_uconst;
1189 if (klass->valuetype && vtype)
1190 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1191 else
1192 encode_uleb128 (field->offset, p, &p);
1193
1194 emit_byte (w, p - buf);
1195 emit_bytes (w, buf, p - buf);
1196 }
1197 }
1198 }
1199
1200 /* Type end */
1201 if (has_children)
1202 emit_uleb128 (w, 0x0);
1203
1204 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1205 emit_uleb128 (w, ABBREV_TYPEDEF);
1206 emit_string (w, full_name);
1207 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1208
1209 /* Add a pointer type */
1210 emit_label (w, pointer_die);
1211
1212 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1213 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1214
1215 /* Add a reference type */
1216 emit_label (w, reference_die);
1217
1218 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1219 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1220
1221 g_free (full_name);
1222
1223 if (emit_namespace) {
1224 /* Namespace end */
1225 emit_uleb128 (w, 0x0);
1226 }
1227
1228 return die;
1229 }
1230
1231 static gboolean base_types_emitted [64];
1232
1233 static const char*
1234 get_type_die (MonoDwarfWriter *w, MonoType *t)
1235 {
1236 MonoClass *klass = mono_class_from_mono_type (t);
1237 int j;
1238 const char *tdie;
1239
1240 if (t->byref) {
1241 if (t->type == MONO_TYPE_VALUETYPE) {
1242 tdie = (const char *)g_hash_table_lookup (w->class_to_pointer_die, klass);
1243 }
1244 else {
1245 tdie = get_class_die (w, klass, FALSE);
1246 /* Should return a pointer type to a reference */
1247 }
1248 // FIXME:
1249 t = &mono_defaults.int_class->byval_arg;
1250 }
1251 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1252 if (basic_types [j].type == t->type)
1253 break;
1254 if (j < G_N_ELEMENTS (basic_types)) {
1255 tdie = basic_types [j].die_name;
1256 } else {
1257 switch (t->type) {
1258 case MONO_TYPE_CLASS:
1259 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1260 //tdie = ".LDIE_OBJECT";
1261 break;
1262 case MONO_TYPE_ARRAY:
1263 tdie = ".LDIE_OBJECT";
1264 break;
1265 case MONO_TYPE_VALUETYPE:
1266 if (klass->enumtype)
1267 tdie = get_class_die (w, klass, FALSE);
1268 else
1269 tdie = ".LDIE_I4";
1270 break;
1271 case MONO_TYPE_GENERICINST:
1272 if (!MONO_TYPE_ISSTRUCT (t)) {
1273 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1274 } else {
1275 tdie = ".LDIE_I4";
1276 }
1277 break;
1278 case MONO_TYPE_PTR:
1279 tdie = ".LDIE_I";
1280 break;
1281 default:
1282 tdie = ".LDIE_I4";
1283 break;
1284 }
1285 }
1286
1287 g_assert (tdie);
1288
1289 return tdie;
1290 }
1291
1292 static void
1293 emit_type (MonoDwarfWriter *w, MonoType *t)
1294 {
1295 MonoClass *klass = mono_class_from_mono_type (t);
1296 int j;
1297 const char *tdie;
1298
1299 if (t->byref) {
1300 if (t->type == MONO_TYPE_VALUETYPE) {
1301 tdie = emit_class_dwarf_info (w, klass, TRUE);
1302 if (tdie)
1303 return;
1304 }
1305 else {
1306 emit_class_dwarf_info (w, klass, FALSE);
1307 }
1308 // FIXME:
1309 t = &mono_defaults.int_class->byval_arg;
1310 }
1311 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1312 if (basic_types [j].type == t->type)
1313 break;
1314 if (j < G_N_ELEMENTS (basic_types)) {
1315 /* Emit a boxed version of base types */
1316 if (j < 64 && !base_types_emitted [j]) {
1317 emit_class_dwarf_info (w, klass, FALSE);
1318 base_types_emitted [j] = TRUE;
1319 }
1320 } else {
1321 switch (t->type) {
1322 case MONO_TYPE_CLASS:
1323 emit_class_dwarf_info (w, klass, FALSE);
1324 break;
1325 case MONO_TYPE_ARRAY:
1326 break;
1327 case MONO_TYPE_VALUETYPE:
1328 if (klass->enumtype)
1329 emit_class_dwarf_info (w, klass, FALSE);
1330 break;
1331 case MONO_TYPE_GENERICINST:
1332 if (!MONO_TYPE_ISSTRUCT (t))
1333 emit_class_dwarf_info (w, klass, FALSE);
1334 break;
1335 case MONO_TYPE_PTR:
1336 break;
1337 default:
1338 break;
1339 }
1340 }
1341 }
1342
1343 static void
1344 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1345 {
1346 const char *tdie;
1347
1348 tdie = get_type_die (w, t);
1349
1350 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1351 }
1352
1353 static void
1354 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1355 {
1356 /* location */
1357 /* FIXME: This needs a location list, since the args can go from reg->stack */
1358 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1359 /* gdb treats this as optimized out */
1360 } else if (ins->opcode == OP_REGVAR) {
1361 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1362 p ++;
1363 } else if (ins->opcode == OP_REGOFFSET) {
1364 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1365 encode_sleb128 (ins->inst_offset, p, &p);
1366 } else {
1367 // FIXME:
1368 *p ++ = DW_OP_reg0;
1369 }
1370
1371 *endp = p;
1372 }
1373
1374 static void
1375 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1376 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1377 guint8 *expr, guint32 expr_len)
1378 {
1379 char label [128];
1380
1381 emit_push_section (w, ".debug_loc", 0);
1382 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1383 emit_label (w, label);
1384
1385 emit_pointer_value (w, loclist_begin_addr);
1386 emit_pointer_value (w, loclist_end_addr);
1387 emit_byte (w, expr_len % 256);
1388 emit_byte (w, expr_len / 256);
1389 emit_bytes (w, expr, expr_len);
1390
1391 emit_pointer_value (w, NULL);
1392 emit_pointer_value (w, NULL);
1393
1394 emit_pop_section (w);
1395 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1396 }
1397
1398 /*
1399 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1400 * it is a public header.
1401 */
1402 static const guint8 *token_handler_ip;
1403
1404 static char*
1405 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1406 {
1407 MonoError error;
1408 char *res, *desc;
1409 MonoMethod *cmethod;
1410 MonoClass *klass;
1411 MonoClassField *field;
1412 gpointer data = NULL;
1413
1414 if (method->wrapper_type)
1415 data = mono_method_get_wrapper_data (method, token);
1416
1417 switch (*token_handler_ip) {
1418 case CEE_ISINST:
1419 case CEE_CASTCLASS:
1420 case CEE_LDELEMA:
1421 if (method->wrapper_type) {
1422 klass = (MonoClass *)data;
1423 } else {
1424 klass = mono_class_get_checked (method->klass->image, token, &error);
1425 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1426 }
1427 res = g_strdup_printf ("<%s>", klass->name);
1428 break;
1429 case CEE_NEWOBJ:
1430 case CEE_CALL:
1431 case CEE_CALLVIRT:
1432 if (method->wrapper_type) {
1433 cmethod = (MonoMethod *)data;
1434 } else {
1435 MonoError error;
1436 cmethod = mono_get_method_checked (method->klass->image, token, NULL, NULL, &error);
1437 if (!cmethod)
1438 g_error ("Could not load method due to %s", mono_error_get_message (&error)); /* FIXME don't swallow the error */
1439 }
1440 desc = mono_method_full_name (cmethod, TRUE);
1441 res = g_strdup_printf ("<%s>", desc);
1442 g_free (desc);
1443 break;
1444 case CEE_CALLI:
1445 if (method->wrapper_type) {
1446 desc = mono_signature_get_desc ((MonoMethodSignature *)data, FALSE);
1447 res = g_strdup_printf ("<%s>", desc);
1448 g_free (desc);
1449 } else {
1450 res = g_strdup_printf ("<0x%08x>", token);
1451 }
1452 break;
1453 case CEE_LDFLD:
1454 case CEE_LDSFLD:
1455 case CEE_STFLD:
1456 case CEE_STSFLD:
1457 if (method->wrapper_type) {
1458 field = (MonoClassField *)data;
1459 } else {
1460 field = mono_field_from_token_checked (method->klass->image, token, &klass, NULL, &error);
1461 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1462 }
1463 desc = mono_field_full_name (field);
1464 res = g_strdup_printf ("<%s>", desc);
1465 g_free (desc);
1466 break;
1467 default:
1468 res = g_strdup_printf ("<0x%08x>", token);
1469 break;
1470 }
1471
1472 return res;
1473 }
1474
1475 /*
1476 * disasm_ins:
1477 *
1478 * Produce a disassembled form of the IL instruction at IP. This is an extension
1479 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1480 * CEE_MONO_ opcodes.
1481 */
1482 static char*
1483 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1484 {
1485 char *dis;
1486 MonoDisHelper dh;
1487 MonoMethodHeader *header = mono_method_get_header (method);
1488
1489 memset (&dh, 0, sizeof (dh));
1490 dh.newline = "";
1491 dh.label_format = "IL_%04x: ";
1492 dh.label_target = "IL_%04x";
1493 dh.tokener = token_handler;
1494
1495 token_handler_ip = ip;
1496 if (*ip == MONO_CUSTOM_PREFIX) {
1497 guint32 token;
1498 gpointer data;
1499
1500 switch (ip [1]) {
1501 case CEE_MONO_ICALL: {
1502 MonoJitICallInfo *info;
1503
1504 token = read32 (ip + 2);
1505 data = mono_method_get_wrapper_data (method, token);
1506 info = mono_find_jit_icall_by_addr (data);
1507 g_assert (info);
1508
1509 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1510 ip += 6;
1511 break;
1512 }
1513 case CEE_MONO_CLASSCONST: {
1514 token = read32 (ip + 2);
1515 data = mono_method_get_wrapper_data (method, token);
1516
1517 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1518 ip += 6;
1519 break;
1520 }
1521 default:
1522 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1523 }
1524 } else {
1525 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1526 }
1527 token_handler_ip = NULL;
1528
1529 *endip = ip;
1530 mono_metadata_free_mh (header);
1531 return dis;
1532 }
1533
1534 static gint32
1535 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1536 guint32 native_offset)
1537 {
1538 int i;
1539
1540 if (!jit->line_numbers)
1541 return -1;
1542
1543 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1544 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1545
1546 if (lne.native_offset <= native_offset)
1547 return lne.il_offset;
1548 }
1549
1550 return -1;
1551 }
1552
1553 static int max_special_addr_diff = 0;
1554
1555 static inline void
1556 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1557 {
1558 gint64 opcode = 0;
1559
1560 /* Use a special opcode if possible */
1561 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1562 if (max_special_addr_diff == 0)
1563 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1564
1565 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1566 emit_byte (w, DW_LNS_const_add_pc);
1567 addr_diff -= max_special_addr_diff;
1568 }
1569
1570 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1571 if (opcode > 255)
1572 opcode = 0;
1573 }
1574
1575 if (opcode != 0) {
1576 emit_byte (w, opcode);
1577 } else {
1578 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1579 emit_byte (w, DW_LNS_advance_line);
1580 emit_sleb128 (w, line_diff);
1581 emit_byte (w, DW_LNS_advance_pc);
1582 emit_sleb128 (w, addr_diff);
1583 emit_byte (w, DW_LNS_copy);
1584 }
1585 }
1586
1587 static gint
1588 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1589 {
1590 if (a->native_offset == b->native_offset)
1591 return a->il_offset - b->il_offset;
1592 else
1593 return a->native_offset - b->native_offset;
1594 }
1595
1596 static void
1597 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1598 char *start_symbol, char *end_symbol,
1599 guint8 *code, guint32 code_size,
1600 MonoDebugMethodJitInfo *debug_info)
1601 {
1602 guint32 prev_line = 0;
1603 guint32 prev_native_offset = 0;
1604 int i, file_index, il_offset, prev_il_offset;
1605 gboolean first = TRUE;
1606 MonoDebugSourceLocation *loc;
1607 char *prev_file_name = NULL;
1608 MonoMethodHeader *header = mono_method_get_header (method);
1609 MonoDebugMethodInfo *minfo;
1610 MonoDebugLineNumberEntry *ln_array;
1611 int *native_to_il_offset = NULL;
1612
1613 if (!w->emit_line) {
1614 mono_metadata_free_mh (header);
1615 return;
1616 }
1617
1618 minfo = mono_debug_lookup_method (method);
1619
1620 /* Compute the native->IL offset mapping */
1621
1622 g_assert (code_size);
1623
1624 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1625 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1626
1627 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (int (*)(const void *, const void *))compare_lne);
1628
1629 native_to_il_offset = g_new0 (int, code_size + 1);
1630
1631 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1632 int j;
1633 MonoDebugLineNumberEntry *lne = &ln_array [i];
1634
1635 if (i == 0) {
1636 for (j = 0; j < lne->native_offset; ++j)
1637 native_to_il_offset [j] = -1;
1638 }
1639
1640 if (i < debug_info->num_line_numbers - 1) {
1641 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1642
1643 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1644 native_to_il_offset [j] = lne->il_offset;
1645 } else {
1646 for (j = lne->native_offset; j < code_size; ++j)
1647 native_to_il_offset [j] = lne->il_offset;
1648 }
1649 }
1650 g_free (ln_array);
1651
1652 prev_line = 1;
1653 prev_il_offset = -1;
1654
1655 w->cur_file_index = -1;
1656 for (i = 0; i < code_size; ++i) {
1657 int line_diff, addr_diff;
1658
1659 if (!minfo)
1660 continue;
1661
1662 if (!debug_info->line_numbers)
1663 continue;
1664
1665 if (native_to_il_offset)
1666 il_offset = native_to_il_offset [i];
1667 else
1668 il_offset = il_offset_from_address (method, debug_info, i);
1669 /*
1670 il_offset = il_offset_from_address (method, debug_info, i);
1671
1672 g_assert (il_offset == native_to_il_offset [i]);
1673 */
1674
1675 il_offset = native_to_il_offset [i];
1676 if (il_offset < 0)
1677 continue;
1678
1679 if (il_offset == prev_il_offset)
1680 continue;
1681
1682 prev_il_offset = il_offset;
1683
1684 loc = mono_debug_symfile_lookup_location (minfo, il_offset);
1685 if (!loc)
1686 continue;
1687 if (!loc->source_file) {
1688 mono_debug_symfile_free_location (loc);
1689 continue;
1690 }
1691
1692 line_diff = (gint32)loc->row - (gint32)prev_line;
1693 addr_diff = i - prev_native_offset;
1694
1695 if (first) {
1696 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1697
1698 emit_byte (w, 0);
1699 emit_byte (w, sizeof (gpointer) + 1);
1700 emit_byte (w, DW_LNE_set_address);
1701 if (start_symbol)
1702 emit_pointer_unaligned (w, start_symbol);
1703 else
1704 emit_pointer_value (w, code);
1705 first = FALSE;
1706 }
1707
1708 if (loc->row != prev_line) {
1709 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1710 /* Add an entry to the file table */
1711 /* FIXME: Avoid duplicates */
1712 if (w->collect_line_info)
1713 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1714 else
1715 file_index = emit_line_number_file_name (w, loc->source_file, 0, 0);
1716 g_free (prev_file_name);
1717 prev_file_name = g_strdup (loc->source_file);
1718
1719 if (w->cur_file_index != file_index) {
1720 emit_byte (w, DW_LNS_set_file);
1721 emit_uleb128 (w, file_index);
1722 emit_byte (w, DW_LNS_copy);
1723 w->cur_file_index = file_index;
1724 }
1725 }
1726 }
1727
1728 if (loc->row != prev_line) {
1729 if (prev_native_offset == 0)
1730 emit_byte (w, DW_LNE_set_prologue_end);
1731
1732 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1733 emit_advance_op (w, line_diff, addr_diff);
1734
1735 prev_line = loc->row;
1736 prev_native_offset = i;
1737 }
1738
1739 mono_debug_symfile_free_location (loc);
1740 first = FALSE;
1741 }
1742
1743 g_free (native_to_il_offset);
1744 g_free (prev_file_name);
1745
1746 if (!first) {
1747 emit_byte (w, DW_LNS_advance_pc);
1748 emit_sleb128 (w, code_size - prev_native_offset);
1749 emit_byte (w, DW_LNS_copy);
1750
1751 emit_byte (w, 0);
1752 emit_byte (w, 1);
1753 emit_byte (w, DW_LNE_end_sequence);
1754 } else if (!start_symbol) {
1755 /* No debug info, XDEBUG mode */
1756 char *name, *dis;
1757 const guint8 *ip = header->code;
1758 int prev_line, prev_native_offset;
1759 int *il_to_line;
1760
1761 /*
1762 * Emit the IL code into a temporary file and emit line number info
1763 * referencing that file.
1764 */
1765
1766 name = mono_method_full_name (method, TRUE);
1767 fprintf (w->il_file, "// %s\n", name);
1768 w->il_file_line_index ++;
1769 g_free (name);
1770
1771 il_to_line = g_new0 (int, header->code_size);
1772
1773 emit_section_change (w, ".debug_line", LINE_SUBSECTION_DATA);
1774 emit_byte (w, 0);
1775 emit_byte (w, sizeof (gpointer) + 1);
1776 emit_byte (w, DW_LNE_set_address);
1777 emit_pointer_value (w, code);
1778
1779 // FIXME: Optimize this
1780 while (ip < header->code + header->code_size) {
1781 int il_offset = ip - header->code;
1782
1783 /* Emit IL */
1784 w->il_file_line_index ++;
1785
1786 dis = disasm_ins (method, ip, &ip);
1787 fprintf (w->il_file, "%s\n", dis);
1788 g_free (dis);
1789
1790 il_to_line [il_offset] = w->il_file_line_index;
1791 }
1792
1793 /* Emit line number info */
1794 prev_line = 1;
1795 prev_native_offset = 0;
1796 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1797 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1798 int line;
1799
1800 if (lne->il_offset >= header->code_size)
1801 continue;
1802 line = il_to_line [lne->il_offset];
1803 if (!line) {
1804 /*
1805 * This seems to happen randomly, it looks like il_offset points
1806 * into the middle of an instruction.
1807 */
1808 continue;
1809 /*
1810 printf ("%s\n", mono_method_full_name (method, TRUE));
1811 printf ("%d %d\n", lne->il_offset, header->code_size);
1812 g_assert (line);
1813 */
1814 }
1815
1816 if (line - prev_line != 0) {
1817 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1818
1819 prev_line = line;
1820 prev_native_offset = lne->native_offset;
1821 }
1822 }
1823
1824 emit_byte (w, DW_LNS_advance_pc);
1825 emit_sleb128 (w, code_size - prev_native_offset);
1826 emit_byte (w, DW_LNS_copy);
1827
1828 emit_byte (w, 0);
1829 emit_byte (w, 1);
1830 emit_byte (w, DW_LNE_end_sequence);
1831
1832 fflush (w->il_file);
1833 g_free (il_to_line);
1834 }
1835 mono_metadata_free_mh (header);
1836 }
1837
1838 static MonoMethodVar*
1839 find_vmv (MonoCompile *cfg, MonoInst *ins)
1840 {
1841 int j;
1842
1843 if (cfg->varinfo) {
1844 for (j = 0; j < cfg->num_varinfo; ++j) {
1845 if (cfg->varinfo [j] == ins)
1846 break;
1847 }
1848
1849 if (j < cfg->num_varinfo) {
1850 return MONO_VARINFO (cfg, j);
1851 }
1852 }
1853
1854 return NULL;
1855 }
1856
1857 void
1858 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1859 guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1860 {
1861 char *name;
1862 MonoMethodSignature *sig;
1863 MonoMethodHeader *header;
1864 char **names;
1865 MonoDebugLocalsInfo *locals_info;
1866 MonoDebugMethodInfo *minfo;
1867 MonoDebugSourceLocation *loc = NULL;
1868 int i;
1869 guint8 buf [128];
1870 guint8 *p;
1871
1872 emit_section_change (w, ".debug_info", 0);
1873
1874 sig = mono_method_signature (method);
1875 header = mono_method_get_header (method);
1876
1877 /* Parameter types */
1878 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1879 MonoType *t;
1880
1881 if (i == 0 && sig->hasthis) {
1882 if (method->klass->valuetype)
1883 t = &method->klass->this_arg;
1884 else
1885 t = &method->klass->byval_arg;
1886 } else {
1887 t = sig->params [i - sig->hasthis];
1888 }
1889
1890 emit_type (w, t);
1891 }
1892 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1893
1894 /* Local types */
1895 for (i = 0; i < header->num_locals; ++i) {
1896 emit_type (w, header->locals [i]);
1897 }
1898
1899 minfo = mono_debug_lookup_method (method);
1900 if (minfo)
1901 loc = mono_debug_symfile_lookup_location (minfo, 0);
1902
1903 /* Subprogram */
1904 names = g_new0 (char *, sig->param_count);
1905 mono_method_get_param_names (method, (const char **) names);
1906
1907 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1908 /* DW_AT_name */
1909 name = mono_method_full_name (method, FALSE);
1910 emit_escaped_string (w, name);
1911 /* DW_AT_MIPS_linkage_name */
1912 if (linkage_name)
1913 emit_string (w, linkage_name);
1914 else
1915 emit_string (w, "");
1916 /* DW_AT_decl_file/DW_AT_decl_line */
1917 if (loc) {
1918 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1919 emit_uleb128 (w, file_index + 1);
1920 emit_uleb128 (w, loc->row);
1921
1922 mono_debug_symfile_free_location (loc);
1923 loc = NULL;
1924 } else {
1925 emit_uleb128 (w, 0);
1926 emit_uleb128 (w, 0);
1927 }
1928 #ifndef TARGET_IOS
1929 emit_string (w, name);
1930 #endif
1931 g_free (name);
1932 if (start_symbol) {
1933 emit_pointer_unaligned (w, start_symbol);
1934 emit_pointer_unaligned (w, end_symbol);
1935 } else {
1936 emit_pointer_value (w, code);
1937 emit_pointer_value (w, code + code_size);
1938 }
1939 /* frame_base */
1940 emit_byte (w, 2);
1941 emit_byte (w, DW_OP_breg6);
1942 emit_byte (w, 16);
1943
1944 /* Parameters */
1945 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1946 MonoInst *arg = args ? args [i] : NULL;
1947 MonoType *t;
1948 const char *pname;
1949 char pname_buf [128];
1950 MonoMethodVar *vmv = NULL;
1951 gboolean need_loclist = FALSE;
1952
1953 vmv = find_vmv (cfg, arg);
1954 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1955 need_loclist = TRUE;
1956
1957 if (i == 0 && sig->hasthis) {
1958 if (method->klass->valuetype)
1959 t = &method->klass->this_arg;
1960 else
1961 t = &method->klass->byval_arg;
1962 pname = "this";
1963 } else {
1964 t = sig->params [i - sig->hasthis];
1965 pname = names [i - sig->hasthis];
1966 }
1967
1968 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1969 /* name */
1970 if (pname[0] == '\0') {
1971 sprintf (pname_buf, "param%d", i - sig->hasthis);
1972 pname = pname_buf;
1973 }
1974 emit_string (w, pname);
1975 /* type */
1976 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1977 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1978 else
1979 emit_var_type (w, t);
1980
1981 p = buf;
1982 encode_var_location (w, arg, p, &p);
1983 if (need_loclist) {
1984 vmv->live_range_start = 0;
1985 if (vmv->live_range_end == 0)
1986 /* FIXME: Uses made in calls are not recorded */
1987 vmv->live_range_end = code_size;
1988 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1989 } else {
1990 emit_byte (w, p - buf);
1991 emit_bytes (w, buf, p - buf);
1992 }
1993 }
1994 g_free (names);
1995
1996 /* Locals */
1997 locals_info = mono_debug_lookup_locals (method);
1998
1999 for (i = 0; i < header->num_locals; ++i) {
2000 MonoInst *ins = locals [i];
2001 char name_buf [128];
2002 int j;
2003 MonoMethodVar *vmv = NULL;
2004 gboolean need_loclist = FALSE;
2005 char *lname;
2006
2007 /* ins->dreg no longer contains the original vreg */
2008 vmv = find_vmv (cfg, ins);
2009 if (code && vmv) {
2010 if (vmv->live_range_start) {
2011 /* This variable has a precise live range */
2012 need_loclist = TRUE;
2013 }
2014 }
2015
2016 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
2017 /* name */
2018 lname = NULL;
2019 if (locals_info) {
2020 for (j = 0; j < locals_info->num_locals; ++j)
2021 if (locals_info->locals [j].index == i)
2022 break;
2023 if (j < locals_info->num_locals)
2024 lname = locals_info->locals [j].name;
2025 }
2026 if (lname) {
2027 emit_string (w, lname);
2028 } else {
2029 sprintf (name_buf, "V_%d", i);
2030 emit_string (w, name_buf);
2031 }
2032 /* type */
2033 if (!ins || ins->flags & MONO_INST_IS_DEAD)
2034 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
2035 else
2036 emit_var_type (w, header->locals [i]);
2037
2038 p = buf;
2039 encode_var_location (w, ins, p, &p);
2040
2041 if (need_loclist) {
2042 if (vmv->live_range_end == 0)
2043 /* FIXME: Uses made in calls are not recorded */
2044 vmv->live_range_end = code_size;
2045 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
2046 } else {
2047 emit_byte (w, p - buf);
2048 emit_bytes (w, buf, p - buf);
2049 }
2050 }
2051
2052 if (locals_info)
2053 mono_debug_free_locals (locals_info);
2054
2055 /* Subprogram end */
2056 emit_uleb128 (w, 0x0);
2057
2058 emit_line (w);
2059
2060 emit_debug_info_end (w);
2061
2062 /* Emit unwind info */
2063 if (unwind_info) {
2064 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
2065 w->fde_index ++;
2066 }
2067
2068 /* Emit line number info */
2069 /* != could happen when using --regression */
2070 if (debug_info && (debug_info->code_start == code)) {
2071 if (w->collect_line_info) {
2072 MethodLineNumberInfo *info;
2073
2074 /* Save the information needed to emit the line number info later at once */
2075 info = g_new0 (MethodLineNumberInfo, 1);
2076 info->method = method;
2077 info->start_symbol = g_strdup (start_symbol);
2078 info->end_symbol = g_strdup (end_symbol);
2079 info->code = code;
2080 info->code_size = code_size;
2081 w->line_info = g_slist_prepend (w->line_info, info);
2082 } else {
2083 emit_line_number_info (w, method, start_symbol, end_symbol, code, code_size, debug_info);
2084 }
2085 }
2086
2087 emit_line (w);
2088 mono_metadata_free_mh (header);
2089 }
2090
2091 void
2092 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)
2093 {
2094 emit_section_change (w, ".debug_info", 0);
2095
2096 /* Subprogram */
2097 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
2098 emit_string (w, tramp_name);
2099 emit_pointer_value (w, code);
2100 emit_pointer_value (w, code + code_size);
2101
2102 /* Subprogram end */
2103 emit_uleb128 (w, 0x0);
2104
2105 emit_debug_info_end (w);
2106
2107 /* Emit unwind info */
2108 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2109 w->fde_index ++;
2110 }
2111 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
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