1 /**
2 * \file
3 * Creation of DWARF debug information
4 *
5 * Author:
6 * Zoltan Varga (vargaz@gmail.com)
7 *
8 * (C) 2008-2009 Novell, Inc.
9 */
10
11 #include "config.h"
12 #include <mono/utils/mono-compiler.h>
13
14 #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
15 #include "dwarfwriter.h"
16
17 #include <sys/types.h>
18 #include <ctype.h>
19 #include <string.h>
20 #ifdef HAVE_STDINT_H
21 #include <stdint.h>
22 #endif
23
24 #include <mono/metadata/mono-endian.h>
25 #include <mono/metadata/debug-internals.h>
26
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;
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 */
74 MonoDwarfWriter*
mono_dwarf_writer_create(MonoImageWriter * writer,FILE * il_file,int il_file_start_line,gboolean emit_line_numbers)75 mono_dwarf_writer_create (MonoImageWriter *writer, FILE *il_file, int il_file_start_line, gboolean emit_line_numbers)
76 {
77 MonoDwarfWriter *w = g_new0 (MonoDwarfWriter, 1);
78
79 w->w = writer;
80 w->il_file = il_file;
81 w->il_file_line_index = il_file_start_line;
82
83 w->emit_line = emit_line_numbers;
84
85 w->fp = mono_img_writer_get_fp (w->w);
86 w->temp_prefix = mono_img_writer_get_temp_label_prefix (w->w);
87
88 w->class_to_die = g_hash_table_new (NULL, NULL);
89 w->class_to_vtype_die = g_hash_table_new (NULL, NULL);
90 w->class_to_pointer_die = g_hash_table_new (NULL, NULL);
91 w->class_to_reference_die = g_hash_table_new (NULL, NULL);
92 w->cur_file_index = -1;
93
94 return w;
95 }
96
97 void
mono_dwarf_writer_destroy(MonoDwarfWriter * w)98 mono_dwarf_writer_destroy (MonoDwarfWriter *w)
99 {
100 g_free (w);
101 }
102
103 int
mono_dwarf_writer_get_il_file_line_index(MonoDwarfWriter * w)104 mono_dwarf_writer_get_il_file_line_index (MonoDwarfWriter *w)
105 {
106 return w->il_file_line_index;
107 }
108
109 /* Wrappers around the image writer functions */
110
111 static inline void
emit_section_change(MonoDwarfWriter * w,const char * section_name,int subsection_index)112 emit_section_change (MonoDwarfWriter *w, const char *section_name, int subsection_index)
113 {
114 mono_img_writer_emit_section_change (w->w, section_name, subsection_index);
115 }
116
117 static inline void
emit_push_section(MonoDwarfWriter * w,const char * section_name,int subsection)118 emit_push_section (MonoDwarfWriter *w, const char *section_name, int subsection)
119 {
120 mono_img_writer_emit_push_section (w->w, section_name, subsection);
121 }
122
123 static inline void
emit_pop_section(MonoDwarfWriter * w)124 emit_pop_section (MonoDwarfWriter *w)
125 {
126 mono_img_writer_emit_pop_section (w->w);
127 }
128
129 static inline void
emit_label(MonoDwarfWriter * w,const char * name)130 emit_label (MonoDwarfWriter *w, const char *name)
131 {
132 mono_img_writer_emit_label (w->w, name);
133 }
134
135 static inline void
emit_bytes(MonoDwarfWriter * w,const guint8 * buf,int size)136 emit_bytes (MonoDwarfWriter *w, const guint8* buf, int size)
137 {
138 mono_img_writer_emit_bytes (w->w, buf, size);
139 }
140
141 static inline void
emit_string(MonoDwarfWriter * w,const char * value)142 emit_string (MonoDwarfWriter *w, const char *value)
143 {
144 mono_img_writer_emit_string (w->w, value);
145 }
146
147 static inline void
emit_line(MonoDwarfWriter * w)148 emit_line (MonoDwarfWriter *w)
149 {
150 mono_img_writer_emit_line (w->w);
151 }
152
153 static inline void
emit_alignment(MonoDwarfWriter * w,int size)154 emit_alignment (MonoDwarfWriter *w, int size)
155 {
156 mono_img_writer_emit_alignment (w->w, size);
157 }
158
159 static inline void
emit_pointer_unaligned(MonoDwarfWriter * w,const char * target)160 emit_pointer_unaligned (MonoDwarfWriter *w, const char *target)
161 {
162 mono_img_writer_emit_pointer_unaligned (w->w, target);
163 }
164
165 static inline void
emit_pointer(MonoDwarfWriter * w,const char * target)166 emit_pointer (MonoDwarfWriter *w, const char *target)
167 {
168 mono_img_writer_emit_pointer (w->w, target);
169 }
170
171 static inline void
emit_int16(MonoDwarfWriter * w,int value)172 emit_int16 (MonoDwarfWriter *w, int value)
173 {
174 mono_img_writer_emit_int16 (w->w, value);
175 }
176
177 static inline void
emit_int32(MonoDwarfWriter * w,int value)178 emit_int32 (MonoDwarfWriter *w, int value)
179 {
180 mono_img_writer_emit_int32 (w->w, value);
181 }
182
183 static inline void
emit_symbol_diff(MonoDwarfWriter * w,const char * end,const char * start,int offset)184 emit_symbol_diff (MonoDwarfWriter *w, const char *end, const char* start, int offset)
185 {
186 mono_img_writer_emit_symbol_diff (w->w, end, start, offset);
187 }
188
189 static inline void
emit_byte(MonoDwarfWriter * w,guint8 val)190 emit_byte (MonoDwarfWriter *w, guint8 val)
191 {
192 mono_img_writer_emit_byte (w->w, val);
193 }
194
195 static void
emit_escaped_string(MonoDwarfWriter * w,char * value)196 emit_escaped_string (MonoDwarfWriter *w, char *value)
197 {
198 int i, len;
199
200 len = strlen (value);
201 for (i = 0; i < len; ++i) {
202 char c = value [i];
203 if (!(isalnum (c))) {
204 switch (c) {
205 case '_':
206 case '-':
207 case ':':
208 case '.':
209 case ',':
210 case '/':
211 case '<':
212 case '>':
213 case '`':
214 case '(':
215 case ')':
216 case '[':
217 case ']':
218 break;
219 default:
220 value [i] = '_';
221 break;
222 }
223 }
224 }
225 mono_img_writer_emit_string (w->w, value);
226 }
227
228 static G_GNUC_UNUSED void
emit_uleb128(MonoDwarfWriter * w,guint32 value)229 emit_uleb128 (MonoDwarfWriter *w, guint32 value)
230 {
231 do {
232 guint8 b = value & 0x7f;
233 value >>= 7;
234 if (value != 0) /* more bytes to come */
235 b |= 0x80;
236 emit_byte (w, b);
237 } while (value);
238 }
239
240 static G_GNUC_UNUSED void
emit_sleb128(MonoDwarfWriter * w,gint64 value)241 emit_sleb128 (MonoDwarfWriter *w, gint64 value)
242 {
243 gboolean more = 1;
244 gboolean negative = (value < 0);
245 guint32 size = 64;
246 guint8 byte;
247
248 while (more) {
249 byte = value & 0x7f;
250 value >>= 7;
251 /* the following is unnecessary if the
252 * implementation of >>= uses an arithmetic rather
253 * than logical shift for a signed left operand
254 */
255 if (negative)
256 /* sign extend */
257 value |= - ((gint64)1 <<(size - 7));
258 /* sign bit of byte is second high order bit (0x40) */
259 if ((value == 0 && !(byte & 0x40)) ||
260 (value == -1 && (byte & 0x40)))
261 more = 0;
262 else
263 byte |= 0x80;
264 emit_byte (w, byte);
265 }
266 }
267
268 static G_GNUC_UNUSED void
encode_uleb128(guint32 value,guint8 * buf,guint8 ** endbuf)269 encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
270 {
271 guint8 *p = buf;
272
273 do {
274 guint8 b = value & 0x7f;
275 value >>= 7;
276 if (value != 0) /* more bytes to come */
277 b |= 0x80;
278 *p ++ = b;
279 } while (value);
280
281 *endbuf = p;
282 }
283
284 static G_GNUC_UNUSED void
encode_sleb128(gint32 value,guint8 * buf,guint8 ** endbuf)285 encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
286 {
287 gboolean more = 1;
288 gboolean negative = (value < 0);
289 guint32 size = 32;
290 guint8 byte;
291 guint8 *p = buf;
292
293 while (more) {
294 byte = value & 0x7f;
295 value >>= 7;
296 /* the following is unnecessary if the
297 * implementation of >>= uses an arithmetic rather
298 * than logical shift for a signed left operand
299 */
300 if (negative)
301 /* sign extend */
302 value |= - (1 <<(size - 7));
303 /* sign bit of byte is second high order bit (0x40) */
304 if ((value == 0 && !(byte & 0x40)) ||
305 (value == -1 && (byte & 0x40)))
306 more = 0;
307 else
308 byte |= 0x80;
309 *p ++= byte;
310 }
311
312 *endbuf = p;
313 }
314
315 static void
emit_dwarf_abbrev(MonoDwarfWriter * w,int code,int tag,gboolean has_child,int * attrs,int attrs_len)316 emit_dwarf_abbrev (MonoDwarfWriter *w, int code, int tag, gboolean has_child,
317 int *attrs, int attrs_len)
318 {
319 int i;
320
321 emit_uleb128 (w, code);
322 emit_uleb128 (w, tag);
323 emit_byte (w, has_child);
324
325 for (i = 0; i < attrs_len; i++)
326 emit_uleb128 (w, attrs [i]);
327 emit_uleb128 (w, 0);
328 emit_uleb128 (w, 0);
329 }
330
331 static void
emit_cie(MonoDwarfWriter * w)332 emit_cie (MonoDwarfWriter *w)
333 {
334 emit_section_change (w, ".debug_frame", 0);
335
336 emit_alignment (w, 8);
337
338 /* Emit a CIE */
339 emit_symbol_diff (w, ".Lcie0_end", ".Lcie0_start", 0); /* length */
340 emit_label (w, ".Lcie0_start");
341 emit_int32 (w, 0xffffffff); /* CIE id */
342 emit_byte (w, 3); /* version */
343 emit_string (w, ""); /* augmention */
344 emit_sleb128 (w, 1); /* code alignment factor */
345 emit_sleb128 (w, mono_unwind_get_dwarf_data_align ()); /* data alignment factor */
346 emit_uleb128 (w, mono_unwind_get_dwarf_pc_reg ());
347
348 w->cie_program = w->cie_program;
349 if (w->cie_program) {
350 guint32 uw_info_len;
351 guint8 *uw_info = mono_unwind_ops_encode (w->cie_program, &uw_info_len);
352 emit_bytes (w, uw_info, uw_info_len);
353 g_free (uw_info);
354 }
355
356 emit_alignment (w, sizeof (gpointer));
357 emit_label (w, ".Lcie0_end");
358 }
359
360 static void
emit_pointer_value(MonoDwarfWriter * w,gpointer ptr)361 emit_pointer_value (MonoDwarfWriter *w, gpointer ptr)
362 {
363 gssize val = (gssize)ptr;
364 emit_bytes (w, (guint8*)&val, sizeof (gpointer));
365 }
366
367 static void
emit_fde(MonoDwarfWriter * w,int fde_index,char * start_symbol,char * end_symbol,guint8 * code,guint32 code_size,GSList * unwind_ops,gboolean use_cie)368 emit_fde (MonoDwarfWriter *w, int fde_index, char *start_symbol, char *end_symbol,
369 guint8 *code, guint32 code_size, GSList *unwind_ops, gboolean use_cie)
370 {
371 char symbol1 [128];
372 char symbol2 [128];
373 GSList *l;
374 guint8 *uw_info;
375 guint32 uw_info_len;
376
377 emit_section_change (w, ".debug_frame", 0);
378
379 sprintf (symbol1, ".Lfde%d_start", fde_index);
380 sprintf (symbol2, ".Lfde%d_end", fde_index);
381 emit_symbol_diff (w, symbol2, symbol1, 0); /* length */
382 emit_label (w, symbol1);
383 emit_int32 (w, 0); /* CIE_pointer */
384 if (start_symbol) {
385 emit_pointer (w, start_symbol); /* initial_location */
386 if (end_symbol)
387 emit_symbol_diff (w, end_symbol, start_symbol, 0); /* address_range */
388 else {
389 g_assert (code_size);
390 emit_int32 (w, code_size);
391 }
392 } else {
393 emit_pointer_value (w, code);
394 emit_int32 (w, code_size);
395 }
396 #if SIZEOF_VOID_P == 8
397 /* Upper 32 bits of code size */
398 emit_int32 (w, 0);
399 #endif
400
401 l = unwind_ops;
402 if (w->cie_program) {
403 // FIXME: Check that the ops really begin with the CIE program */
404 int i;
405
406 for (i = 0; i < g_slist_length (w->cie_program); ++i)
407 if (l)
408 l = l->next;
409 }
410
411 /* Convert the list of MonoUnwindOps to the format used by DWARF */
412 uw_info = mono_unwind_ops_encode_full (l, &uw_info_len, FALSE);
413 emit_bytes (w, uw_info, uw_info_len);
414 g_free (uw_info);
415
416 emit_alignment (w, sizeof (mgreg_t));
417 emit_label (w, symbol2);
418 }
419
420 /* Abbrevations */
421 #define ABBREV_COMPILE_UNIT 1
422 #define ABBREV_SUBPROGRAM 2
423 #define ABBREV_PARAM 3
424 #define ABBREV_BASE_TYPE 4
425 #define ABBREV_STRUCT_TYPE 5
426 #define ABBREV_DATA_MEMBER 6
427 #define ABBREV_TYPEDEF 7
428 #define ABBREV_ENUM_TYPE 8
429 #define ABBREV_ENUMERATOR 9
430 #define ABBREV_NAMESPACE 10
431 #define ABBREV_VARIABLE 11
432 #define ABBREV_VARIABLE_LOCLIST 12
433 #define ABBREV_POINTER_TYPE 13
434 #define ABBREV_REFERENCE_TYPE 14
435 #define ABBREV_PARAM_LOCLIST 15
436 #define ABBREV_INHERITANCE 16
437 #define ABBREV_STRUCT_TYPE_NOCHILDREN 17
438 #define ABBREV_TRAMP_SUBPROGRAM 18
439
440 static int compile_unit_attr [] = {
441 DW_AT_producer ,DW_FORM_string,
442 DW_AT_name ,DW_FORM_string,
443 DW_AT_comp_dir ,DW_FORM_string,
444 DW_AT_language ,DW_FORM_data1,
445 DW_AT_low_pc ,DW_FORM_addr,
446 DW_AT_high_pc ,DW_FORM_addr,
447 DW_AT_stmt_list ,DW_FORM_data4
448 };
449
450 static int subprogram_attr [] = {
451 DW_AT_name , DW_FORM_string,
452 DW_AT_MIPS_linkage_name, DW_FORM_string,
453 DW_AT_decl_file , DW_FORM_udata,
454 DW_AT_decl_line , DW_FORM_udata,
455 #ifndef TARGET_IOS
456 DW_AT_description , DW_FORM_string,
457 #endif
458 DW_AT_low_pc , DW_FORM_addr,
459 DW_AT_high_pc , DW_FORM_addr,
460 DW_AT_frame_base , DW_FORM_block1
461 };
462
463 static int tramp_subprogram_attr [] = {
464 DW_AT_name , DW_FORM_string,
465 DW_AT_low_pc , DW_FORM_addr,
466 DW_AT_high_pc , DW_FORM_addr,
467 };
468
469 static int param_attr [] = {
470 DW_AT_name, DW_FORM_string,
471 DW_AT_type, DW_FORM_ref4,
472 DW_AT_location, DW_FORM_block1
473 };
474
475 static int param_loclist_attr [] = {
476 DW_AT_name, DW_FORM_string,
477 DW_AT_type, DW_FORM_ref4,
478 DW_AT_location, DW_FORM_data4
479 };
480
481 static int base_type_attr [] = {
482 DW_AT_byte_size, DW_FORM_data1,
483 DW_AT_encoding, DW_FORM_data1,
484 DW_AT_name, DW_FORM_string
485 };
486
487 static int struct_type_attr [] = {
488 DW_AT_name, DW_FORM_string,
489 DW_AT_byte_size, DW_FORM_udata,
490 };
491
492 static int data_member_attr [] = {
493 DW_AT_name, DW_FORM_string,
494 DW_AT_type, DW_FORM_ref4,
495 DW_AT_data_member_location, DW_FORM_block1
496 };
497
498 static int typedef_attr [] = {
499 DW_AT_name, DW_FORM_string,
500 DW_AT_type, DW_FORM_ref4
501 };
502
503 static int pointer_type_attr [] = {
504 DW_AT_type, DW_FORM_ref4,
505 };
506
507 static int reference_type_attr [] = {
508 DW_AT_type, DW_FORM_ref4,
509 };
510
511 static int enum_type_attr [] = {
512 DW_AT_name, DW_FORM_string,
513 DW_AT_byte_size, DW_FORM_udata,
514 DW_AT_type, DW_FORM_ref4,
515 };
516
517 static int enumerator_attr [] = {
518 DW_AT_name, DW_FORM_string,
519 DW_AT_const_value, DW_FORM_sdata,
520 };
521
522 static int namespace_attr [] = {
523 DW_AT_name, DW_FORM_string,
524 };
525
526 static int variable_attr [] = {
527 DW_AT_name, DW_FORM_string,
528 DW_AT_type, DW_FORM_ref4,
529 DW_AT_location, DW_FORM_block1
530 };
531
532 static int variable_loclist_attr [] = {
533 DW_AT_name, DW_FORM_string,
534 DW_AT_type, DW_FORM_ref4,
535 DW_AT_location, DW_FORM_data4
536 };
537
538 static int inheritance_attr [] = {
539 DW_AT_type, DW_FORM_ref4,
540 DW_AT_data_member_location, DW_FORM_block1
541 };
542
543 typedef struct DwarfBasicType {
544 const char *die_name, *name;
545 int type;
546 int size;
547 int encoding;
548 } DwarfBasicType;
549
550 static DwarfBasicType basic_types [] = {
551 { ".LDIE_I1", "sbyte", MONO_TYPE_I1, 1, DW_ATE_signed },
552 { ".LDIE_U1", "byte", MONO_TYPE_U1, 1, DW_ATE_unsigned },
553 { ".LDIE_I2", "short", MONO_TYPE_I2, 2, DW_ATE_signed },
554 { ".LDIE_U2", "ushort", MONO_TYPE_U2, 2, DW_ATE_unsigned },
555 { ".LDIE_I4", "int", MONO_TYPE_I4, 4, DW_ATE_signed },
556 { ".LDIE_U4", "uint", MONO_TYPE_U4, 4, DW_ATE_unsigned },
557 { ".LDIE_I8", "long", MONO_TYPE_I8, 8, DW_ATE_signed },
558 { ".LDIE_U8", "ulong", MONO_TYPE_U8, 8, DW_ATE_unsigned },
559 { ".LDIE_I", "intptr", MONO_TYPE_I, SIZEOF_VOID_P, DW_ATE_signed },
560 { ".LDIE_U", "uintptr", MONO_TYPE_U, SIZEOF_VOID_P, DW_ATE_unsigned },
561 { ".LDIE_R4", "float", MONO_TYPE_R4, 4, DW_ATE_float },
562 { ".LDIE_R8", "double", MONO_TYPE_R8, 8, DW_ATE_float },
563 { ".LDIE_BOOLEAN", "boolean", MONO_TYPE_BOOLEAN, 1, DW_ATE_boolean },
564 { ".LDIE_CHAR", "char", MONO_TYPE_CHAR, 2, DW_ATE_unsigned_char },
565 { ".LDIE_STRING", "string", MONO_TYPE_STRING, sizeof (gpointer), DW_ATE_address },
566 { ".LDIE_OBJECT", "object", MONO_TYPE_OBJECT, sizeof (gpointer), DW_ATE_address },
567 { ".LDIE_SZARRAY", "object", MONO_TYPE_SZARRAY, sizeof (gpointer), DW_ATE_address },
568 };
569
570 /* Constants for encoding line number special opcodes */
571 #define OPCODE_BASE 13
572 #define LINE_BASE -5
573 #define LINE_RANGE 14
574
575 static int
get_line_number_file_name(MonoDwarfWriter * w,const char * name)576 get_line_number_file_name (MonoDwarfWriter *w, const char *name)
577 {
578 int index;
579
580 g_assert (w->file_to_index);
581 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
582 g_assert (index > 0);
583 return index - 1;
584 }
585
586 static int
add_line_number_file_name(MonoDwarfWriter * w,const char * name,gint64 last_mod_time,gint64 file_size)587 add_line_number_file_name (MonoDwarfWriter *w, const char *name,
588 gint64 last_mod_time, gint64 file_size)
589 {
590 int index;
591 char *copy;
592
593 if (!w->file_to_index) {
594 w->file_to_index = g_hash_table_new (g_str_hash, g_str_equal);
595 w->index_to_file = g_hash_table_new (NULL, NULL);
596 }
597
598 index = GPOINTER_TO_UINT (g_hash_table_lookup (w->file_to_index, name));
599 if (index > 0)
600 return index - 1;
601 index = w->line_number_file_index;
602 w->line_number_file_index ++;
603 copy = g_strdup (name);
604 g_hash_table_insert (w->file_to_index, copy, GUINT_TO_POINTER (index + 1));
605 g_hash_table_insert (w->index_to_file, GUINT_TO_POINTER (index + 1), copy);
606
607 return index;
608 }
609
610 char *
mono_dwarf_escape_path(const char * name)611 mono_dwarf_escape_path (const char *name)
612 {
613 if (strchr (name, '\\')) {
614 char *s;
615 int len, i, j;
616
617 len = strlen (name);
618 s = (char *)g_malloc0 ((len + 1) * 2);
619 j = 0;
620 for (i = 0; i < len; ++i) {
621 if (name [i] == '\\') {
622 s [j ++] = '\\';
623 s [j ++] = '\\';
624 } else {
625 s [j ++] = name [i];
626 }
627 }
628 return s;
629 }
630 return g_strdup (name);
631 }
632
633 static void
emit_all_line_number_info(MonoDwarfWriter * w)634 emit_all_line_number_info (MonoDwarfWriter *w)
635 {
636 int i;
637 GHashTable *dir_to_index, *index_to_dir;
638 GSList *l;
639 GSList *info_list;
640
641 add_line_number_file_name (w, "<unknown>", 0, 0);
642
643 /* Collect files */
644 info_list = g_slist_reverse (w->line_info);
645 for (l = info_list; l; l = l->next) {
646 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
647 MonoDebugMethodInfo *minfo;
648 GPtrArray *source_file_list;
649
650 // FIXME: Free stuff
651 minfo = mono_debug_lookup_method (info->method);
652 if (!minfo)
653 continue;
654
655 mono_debug_get_seq_points (minfo, NULL, &source_file_list, NULL, NULL, NULL);
656 for (i = 0; i < source_file_list->len; ++i) {
657 MonoDebugSourceInfo *sinfo = (MonoDebugSourceInfo *)g_ptr_array_index (source_file_list, i);
658 add_line_number_file_name (w, sinfo->source_file, 0, 0);
659 }
660 }
661
662 /* Preprocess files */
663 dir_to_index = g_hash_table_new (g_str_hash, g_str_equal);
664 index_to_dir = g_hash_table_new (NULL, NULL);
665 for (i = 0; i < w->line_number_file_index; ++i) {
666 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
667 char *copy;
668 int dir_index = 0;
669
670 if (g_path_is_absolute (name)) {
671 char *dir = g_path_get_dirname (name);
672
673 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
674 if (dir_index == 0) {
675 dir_index = w->line_number_dir_index;
676 w->line_number_dir_index ++;
677 copy = g_strdup (dir);
678 g_hash_table_insert (dir_to_index, copy, GUINT_TO_POINTER (dir_index + 1));
679 g_hash_table_insert (index_to_dir, GUINT_TO_POINTER (dir_index + 1), copy);
680 } else {
681 dir_index --;
682 }
683
684 g_free (dir);
685 }
686 }
687
688 /* Line number info header */
689 emit_section_change (w, ".debug_line", 0);
690 emit_label (w, ".Ldebug_line_section_start");
691 emit_label (w, ".Ldebug_line_start");
692 emit_symbol_diff (w, ".Ldebug_line_end", ".", -4); /* length */
693 emit_int16 (w, 0x2); /* version */
694 emit_symbol_diff (w, ".Ldebug_line_header_end", ".", -4); /* header_length */
695 emit_byte (w, 1); /* minimum_instruction_length */
696 emit_byte (w, 1); /* default_is_stmt */
697 emit_byte (w, LINE_BASE); /* line_base */
698 emit_byte (w, LINE_RANGE); /* line_range */
699 emit_byte (w, OPCODE_BASE); /* opcode_base */
700 emit_byte (w, 0); /* standard_opcode_lengths */
701 emit_byte (w, 1);
702 emit_byte (w, 1);
703 emit_byte (w, 1);
704 emit_byte (w, 1);
705 emit_byte (w, 0);
706 emit_byte (w, 0);
707 emit_byte (w, 0);
708 emit_byte (w, 1);
709 emit_byte (w, 0);
710 emit_byte (w, 0);
711 emit_byte (w, 1);
712
713 /* Includes */
714 emit_section_change (w, ".debug_line", 0);
715 for (i = 0; i < w->line_number_dir_index; ++i) {
716 char *dir = (char *)g_hash_table_lookup (index_to_dir, GUINT_TO_POINTER (i + 1));
717
718 emit_string (w, mono_dwarf_escape_path (dir));
719 }
720 /* End of Includes */
721 emit_byte (w, 0);
722
723 /* Files */
724 for (i = 0; i < w->line_number_file_index; ++i) {
725 char *name = (char *)g_hash_table_lookup (w->index_to_file, GUINT_TO_POINTER (i + 1));
726 char *basename = NULL, *dir;
727 int dir_index = 0;
728
729 if (g_path_is_absolute (name)) {
730 dir = g_path_get_dirname (name);
731
732 dir_index = GPOINTER_TO_UINT (g_hash_table_lookup (dir_to_index, dir));
733 basename = g_path_get_basename (name);
734 }
735
736 if (basename)
737 emit_string (w, basename);
738 else
739 emit_string (w, mono_dwarf_escape_path (name));
740 emit_uleb128 (w, dir_index);
741 emit_byte (w, 0);
742 emit_byte (w, 0);
743 }
744
745 /* End of Files */
746 emit_byte (w, 0);
747
748 emit_label (w, ".Ldebug_line_header_end");
749
750 /* Emit line number table */
751 for (l = info_list; l; l = l->next) {
752 MethodLineNumberInfo *info = (MethodLineNumberInfo *)l->data;
753 MonoDebugMethodJitInfo *dmji;
754
755 dmji = mono_debug_find_method (info->method, mono_domain_get ());
756 if (!dmji)
757 continue;
758 emit_line_number_info (w, info->method, info->start_symbol, info->end_symbol, info->code, info->code_size, dmji);
759 mono_debug_free_method_jit_info (dmji);
760 }
761 g_slist_free (info_list);
762
763 emit_byte (w, 0);
764 emit_byte (w, 1);
765 emit_byte (w, DW_LNE_end_sequence);
766
767 emit_label (w, ".Ldebug_line_end");
768 }
769
770 /*
771 * Some assemblers like apple's do not support subsections, so we can't place
772 * .Ldebug_info_end at the end of the section using subsections. Instead, we
773 * define it every time something gets added to the .debug_info section.
774 * The apple assember seems to use the last definition.
775 */
776 static void
emit_debug_info_end(MonoDwarfWriter * w)777 emit_debug_info_end (MonoDwarfWriter *w)
778 {
779 /* This doesn't seem to work/required with recent iphone sdk versions */
780 #if 0
781 if (!mono_img_writer_subsections_supported (w->w))
782 fprintf (w->fp, "\n.set %sdebug_info_end,.\n", w->temp_prefix);
783 #endif
784 }
785
786 void
mono_dwarf_writer_emit_base_info(MonoDwarfWriter * w,const char * cu_name,GSList * base_unwind_program)787 mono_dwarf_writer_emit_base_info (MonoDwarfWriter *w, const char *cu_name, GSList *base_unwind_program)
788 {
789 char *s, *build_info;
790 int i;
791
792 if (!w->emit_line) {
793 emit_section_change (w, ".debug_line", 0);
794 emit_label (w, ".Ldebug_line_section_start");
795 emit_label (w, ".Ldebug_line_start");
796 }
797
798 w->cie_program = base_unwind_program;
799
800 emit_section_change (w, ".debug_abbrev", 0);
801 emit_dwarf_abbrev (w, ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, TRUE,
802 compile_unit_attr, G_N_ELEMENTS (compile_unit_attr));
803 emit_dwarf_abbrev (w, ABBREV_SUBPROGRAM, DW_TAG_subprogram, TRUE,
804 subprogram_attr, G_N_ELEMENTS (subprogram_attr));
805 emit_dwarf_abbrev (w, ABBREV_PARAM, DW_TAG_formal_parameter, FALSE,
806 param_attr, G_N_ELEMENTS (param_attr));
807 emit_dwarf_abbrev (w, ABBREV_PARAM_LOCLIST, DW_TAG_formal_parameter, FALSE,
808 param_loclist_attr, G_N_ELEMENTS (param_loclist_attr));
809 emit_dwarf_abbrev (w, ABBREV_BASE_TYPE, DW_TAG_base_type, FALSE,
810 base_type_attr, G_N_ELEMENTS (base_type_attr));
811 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE, DW_TAG_class_type, TRUE,
812 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
813 emit_dwarf_abbrev (w, ABBREV_STRUCT_TYPE_NOCHILDREN, DW_TAG_class_type, FALSE,
814 struct_type_attr, G_N_ELEMENTS (struct_type_attr));
815 emit_dwarf_abbrev (w, ABBREV_DATA_MEMBER, DW_TAG_member, FALSE,
816 data_member_attr, G_N_ELEMENTS (data_member_attr));
817 emit_dwarf_abbrev (w, ABBREV_TYPEDEF, DW_TAG_typedef, FALSE,
818 typedef_attr, G_N_ELEMENTS (typedef_attr));
819 emit_dwarf_abbrev (w, ABBREV_ENUM_TYPE, DW_TAG_enumeration_type, TRUE,
820 enum_type_attr, G_N_ELEMENTS (enum_type_attr));
821 emit_dwarf_abbrev (w, ABBREV_ENUMERATOR, DW_TAG_enumerator, FALSE,
822 enumerator_attr, G_N_ELEMENTS (enumerator_attr));
823 emit_dwarf_abbrev (w, ABBREV_NAMESPACE, DW_TAG_namespace, TRUE,
824 namespace_attr, G_N_ELEMENTS (namespace_attr));
825 emit_dwarf_abbrev (w, ABBREV_VARIABLE, DW_TAG_variable, FALSE,
826 variable_attr, G_N_ELEMENTS (variable_attr));
827 emit_dwarf_abbrev (w, ABBREV_VARIABLE_LOCLIST, DW_TAG_variable, FALSE,
828 variable_loclist_attr, G_N_ELEMENTS (variable_loclist_attr));
829 emit_dwarf_abbrev (w, ABBREV_POINTER_TYPE, DW_TAG_pointer_type, FALSE,
830 pointer_type_attr, G_N_ELEMENTS (pointer_type_attr));
831 emit_dwarf_abbrev (w, ABBREV_REFERENCE_TYPE, DW_TAG_reference_type, FALSE,
832 reference_type_attr, G_N_ELEMENTS (reference_type_attr));
833 emit_dwarf_abbrev (w, ABBREV_INHERITANCE, DW_TAG_inheritance, FALSE,
834 inheritance_attr, G_N_ELEMENTS (inheritance_attr));
835 emit_dwarf_abbrev (w, ABBREV_TRAMP_SUBPROGRAM, DW_TAG_subprogram, FALSE,
836 tramp_subprogram_attr, G_N_ELEMENTS (tramp_subprogram_attr));
837 emit_byte (w, 0);
838
839 emit_section_change (w, ".debug_info", 0);
840 emit_label (w, ".Ldebug_info_start");
841 emit_symbol_diff (w, ".Ldebug_info_end", ".Ldebug_info_begin", 0); /* length */
842 emit_label (w, ".Ldebug_info_begin");
843 emit_int16 (w, 0x2); /* DWARF version 2 */
844 emit_int32 (w, 0); /* .debug_abbrev offset */
845 emit_byte (w, sizeof (gpointer)); /* address size */
846
847 /* Compilation unit */
848 emit_uleb128 (w, ABBREV_COMPILE_UNIT);
849 build_info = mono_get_runtime_build_info ();
850 s = g_strdup_printf ("Mono AOT Compiler %s", build_info);
851 emit_string (w, s);
852 g_free (build_info);
853 g_free (s);
854 emit_string (w, cu_name);
855 emit_string (w, "");
856 emit_byte (w, DW_LANG_C);
857 emit_pointer_value (w, 0);
858 emit_pointer_value (w, 0);
859 /* offset into .debug_line section */
860 emit_symbol_diff (w, ".Ldebug_line_start", ".Ldebug_line_section_start", 0);
861
862 /* Base types */
863 for (i = 0; i < G_N_ELEMENTS (basic_types); ++i) {
864 emit_label (w, basic_types [i].die_name);
865 emit_uleb128 (w, ABBREV_BASE_TYPE);
866 emit_byte (w, basic_types [i].size);
867 emit_byte (w, basic_types [i].encoding);
868 emit_string (w, basic_types [i].name);
869 }
870
871 emit_debug_info_end (w);
872
873 /* debug_loc section */
874 emit_section_change (w, ".debug_loc", 0);
875 emit_label (w, ".Ldebug_loc_start");
876
877 emit_cie (w);
878 }
879
880 /*
881 * mono_dwarf_writer_close:
882 *
883 * Finalize the emitted debugging info.
884 */
885 void
mono_dwarf_writer_close(MonoDwarfWriter * w)886 mono_dwarf_writer_close (MonoDwarfWriter *w)
887 {
888 emit_section_change (w, ".debug_info", 0);
889 emit_byte (w, 0); /* close COMPILE_UNIT */
890 emit_label (w, ".Ldebug_info_end");
891
892 if (w->emit_line)
893 emit_all_line_number_info (w);
894 }
895
896 static void emit_type (MonoDwarfWriter *w, MonoType *t);
897 static const char* get_type_die (MonoDwarfWriter *w, MonoType *t);
898
899 static const char*
get_class_die(MonoDwarfWriter * w,MonoClass * klass,gboolean vtype)900 get_class_die (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
901 {
902 GHashTable *cache;
903
904 if (vtype)
905 cache = w->class_to_vtype_die;
906 else
907 cache = w->class_to_die;
908
909 return (const char *)g_hash_table_lookup (cache, klass);
910 }
911
912 /* Returns the local symbol pointing to the emitted debug info */
913 static char*
emit_class_dwarf_info(MonoDwarfWriter * w,MonoClass * klass,gboolean vtype)914 emit_class_dwarf_info (MonoDwarfWriter *w, MonoClass *klass, gboolean vtype)
915 {
916 char *die, *pointer_die, *reference_die;
917 char *full_name, *p;
918 gpointer iter;
919 MonoClassField *field;
920 const char *fdie;
921 int k;
922 gboolean emit_namespace = FALSE, has_children;
923 GHashTable *cache;
924
925 if (vtype)
926 cache = w->class_to_vtype_die;
927 else
928 cache = w->class_to_die;
929
930 die = (char *)g_hash_table_lookup (cache, klass);
931 if (die)
932 return die;
933
934 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) ||
935 (klass->byval_arg.type >= MONO_TYPE_BOOLEAN && klass->byval_arg.type <= MONO_TYPE_R8 && !vtype)))
936 return NULL;
937
938 /*
939 * FIXME: gdb can't handle namespaces in languages it doesn't know about.
940 */
941 /*
942 if (klass->name_space && klass->name_space [0] != '\0')
943 emit_namespace = TRUE;
944 */
945 if (emit_namespace) {
946 emit_uleb128 (w, ABBREV_NAMESPACE);
947 emit_string (w, klass->name_space);
948 }
949
950 full_name = g_strdup_printf ("%s%s%s", klass->name_space, klass->name_space ? "." : "", klass->name);
951 /*
952 * gdb doesn't support namespaces for non-C++ dwarf objects, so use _
953 * to separate components.
954 */
955 for (p = full_name; *p; p ++)
956 if (*p == '.')
957 *p = '_';
958
959 die = g_strdup_printf (".LTDIE_%d", w->tdie_index);
960 pointer_die = g_strdup_printf (".LTDIE_%d_POINTER", w->tdie_index);
961 reference_die = g_strdup_printf (".LTDIE_%d_REFERENCE", w->tdie_index);
962 w->tdie_index ++;
963
964 g_hash_table_insert (w->class_to_pointer_die, klass, pointer_die);
965 g_hash_table_insert (w->class_to_reference_die, klass, reference_die);
966 g_hash_table_insert (cache, klass, die);
967
968 if (klass->enumtype) {
969 int size = mono_class_value_size (mono_class_from_mono_type (mono_class_enum_basetype (klass)), NULL);
970
971 emit_label (w, die);
972
973 emit_uleb128 (w, ABBREV_ENUM_TYPE);
974 emit_string (w, full_name);
975 emit_uleb128 (w, size);
976 for (k = 0; k < G_N_ELEMENTS (basic_types); ++k)
977 if (basic_types [k].type == mono_class_enum_basetype (klass)->type)
978 break;
979 g_assert (k < G_N_ELEMENTS (basic_types));
980 emit_symbol_diff (w, basic_types [k].die_name, ".Ldebug_info_start", 0);
981
982 /* Emit enum values */
983 iter = NULL;
984 while ((field = mono_class_get_fields (klass, &iter))) {
985 const char *p;
986 MonoTypeEnum def_type;
987
988 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC))
989 continue;
990 if (mono_field_is_deleted (field))
991 continue;
992
993 emit_uleb128 (w, ABBREV_ENUMERATOR);
994 emit_string (w, mono_field_get_name (field));
995
996 p = mono_class_get_field_default_value (field, &def_type);
997 /* len = */ mono_metadata_decode_blob_size (p, &p);
998 switch (mono_class_enum_basetype (klass)->type) {
999 case MONO_TYPE_U1:
1000 case MONO_TYPE_I1:
1001 case MONO_TYPE_BOOLEAN:
1002 emit_sleb128 (w, *p);
1003 break;
1004 case MONO_TYPE_U2:
1005 case MONO_TYPE_I2:
1006 case MONO_TYPE_CHAR:
1007 emit_sleb128 (w, read16 (p));
1008 break;
1009 case MONO_TYPE_U4:
1010 case MONO_TYPE_I4:
1011 emit_sleb128 (w, read32 (p));
1012 break;
1013 case MONO_TYPE_U8:
1014 case MONO_TYPE_I8:
1015 emit_sleb128 (w, read64 (p));
1016 break;
1017 case MONO_TYPE_I:
1018 case MONO_TYPE_U:
1019 #if SIZEOF_VOID_P == 8
1020 emit_sleb128 (w, read64 (p));
1021 #else
1022 emit_sleb128 (w, read32 (p));
1023 #endif
1024 break;
1025 default:
1026 g_assert_not_reached ();
1027 }
1028 }
1029
1030 has_children = TRUE;
1031 } else {
1032 guint8 buf [128];
1033 guint8 *p;
1034 char *parent_die;
1035
1036 if (klass->parent)
1037 parent_die = emit_class_dwarf_info (w, klass->parent, FALSE);
1038 else
1039 parent_die = NULL;
1040
1041 /* Emit field types */
1042 iter = NULL;
1043 while ((field = mono_class_get_fields (klass, &iter))) {
1044 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1045 continue;
1046
1047 emit_type (w, field->type);
1048 }
1049
1050 iter = NULL;
1051 has_children = parent_die || mono_class_get_fields (klass, &iter);
1052
1053 emit_label (w, die);
1054
1055 emit_uleb128 (w, has_children ? ABBREV_STRUCT_TYPE : ABBREV_STRUCT_TYPE_NOCHILDREN);
1056 emit_string (w, full_name);
1057 emit_uleb128 (w, klass->instance_size);
1058
1059 if (parent_die) {
1060 emit_uleb128 (w, ABBREV_INHERITANCE);
1061 emit_symbol_diff (w, parent_die, ".Ldebug_info_start", 0);
1062
1063 p = buf;
1064 *p ++= DW_OP_plus_uconst;
1065 encode_uleb128 (0, p, &p);
1066 emit_byte (w, p - buf);
1067 emit_bytes (w, buf, p - buf);
1068 }
1069
1070 /* Emit fields */
1071 iter = NULL;
1072 while ((field = mono_class_get_fields (klass, &iter))) {
1073 if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
1074 continue;
1075
1076 fdie = get_type_die (w, field->type);
1077 if (fdie) {
1078 emit_uleb128 (w, ABBREV_DATA_MEMBER);
1079 emit_string (w, field->name);
1080 emit_symbol_diff (w, fdie, ".Ldebug_info_start", 0);
1081 /* location */
1082 p = buf;
1083 *p ++= DW_OP_plus_uconst;
1084 if (klass->valuetype && vtype)
1085 encode_uleb128 (field->offset - sizeof (MonoObject), p, &p);
1086 else
1087 encode_uleb128 (field->offset, p, &p);
1088
1089 emit_byte (w, p - buf);
1090 emit_bytes (w, buf, p - buf);
1091 }
1092 }
1093 }
1094
1095 /* Type end */
1096 if (has_children)
1097 emit_uleb128 (w, 0x0);
1098
1099 /* Add a typedef, so we can reference the type without a 'struct' in gdb */
1100 emit_uleb128 (w, ABBREV_TYPEDEF);
1101 emit_string (w, full_name);
1102 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1103
1104 /* Add a pointer type */
1105 emit_label (w, pointer_die);
1106
1107 emit_uleb128 (w, ABBREV_POINTER_TYPE);
1108 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1109
1110 /* Add a reference type */
1111 emit_label (w, reference_die);
1112
1113 emit_uleb128 (w, ABBREV_REFERENCE_TYPE);
1114 emit_symbol_diff (w, die, ".Ldebug_info_start", 0);
1115
1116 g_free (full_name);
1117
1118 if (emit_namespace) {
1119 /* Namespace end */
1120 emit_uleb128 (w, 0x0);
1121 }
1122
1123 return die;
1124 }
1125
1126 static gboolean base_types_emitted [64];
1127
1128 static const char*
get_type_die(MonoDwarfWriter * w,MonoType * t)1129 get_type_die (MonoDwarfWriter *w, MonoType *t)
1130 {
1131 MonoClass *klass = mono_class_from_mono_type (t);
1132 int j;
1133 const char *tdie;
1134
1135 if (t->byref) {
1136 if (t->type == MONO_TYPE_VALUETYPE) {
1137 tdie = (const char *)g_hash_table_lookup (w->class_to_pointer_die, klass);
1138 }
1139 else {
1140 tdie = get_class_die (w, klass, FALSE);
1141 /* Should return a pointer type to a reference */
1142 }
1143 // FIXME:
1144 t = &mono_defaults.int_class->byval_arg;
1145 }
1146 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1147 if (basic_types [j].type == t->type)
1148 break;
1149 if (j < G_N_ELEMENTS (basic_types)) {
1150 tdie = basic_types [j].die_name;
1151 } else {
1152 switch (t->type) {
1153 case MONO_TYPE_CLASS:
1154 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1155 //tdie = ".LDIE_OBJECT";
1156 break;
1157 case MONO_TYPE_ARRAY:
1158 tdie = ".LDIE_OBJECT";
1159 break;
1160 case MONO_TYPE_VALUETYPE:
1161 if (klass->enumtype)
1162 tdie = get_class_die (w, klass, FALSE);
1163 else
1164 tdie = ".LDIE_I4";
1165 break;
1166 case MONO_TYPE_GENERICINST:
1167 if (!MONO_TYPE_ISSTRUCT (t)) {
1168 tdie = (const char *)g_hash_table_lookup (w->class_to_reference_die, klass);
1169 } else {
1170 tdie = ".LDIE_I4";
1171 }
1172 break;
1173 case MONO_TYPE_PTR:
1174 tdie = ".LDIE_I";
1175 break;
1176 default:
1177 tdie = ".LDIE_I4";
1178 break;
1179 }
1180 }
1181
1182 g_assert (tdie);
1183
1184 return tdie;
1185 }
1186
1187 static void
emit_type(MonoDwarfWriter * w,MonoType * t)1188 emit_type (MonoDwarfWriter *w, MonoType *t)
1189 {
1190 MonoClass *klass = mono_class_from_mono_type (t);
1191 int j;
1192 const char *tdie;
1193
1194 if (t->byref) {
1195 if (t->type == MONO_TYPE_VALUETYPE) {
1196 tdie = emit_class_dwarf_info (w, klass, TRUE);
1197 if (tdie)
1198 return;
1199 }
1200 else {
1201 emit_class_dwarf_info (w, klass, FALSE);
1202 }
1203 // FIXME:
1204 t = &mono_defaults.int_class->byval_arg;
1205 }
1206 for (j = 0; j < G_N_ELEMENTS (basic_types); ++j)
1207 if (basic_types [j].type == t->type)
1208 break;
1209 if (j < G_N_ELEMENTS (basic_types)) {
1210 /* Emit a boxed version of base types */
1211 if (j < 64 && !base_types_emitted [j]) {
1212 emit_class_dwarf_info (w, klass, FALSE);
1213 base_types_emitted [j] = TRUE;
1214 }
1215 } else {
1216 switch (t->type) {
1217 case MONO_TYPE_CLASS:
1218 emit_class_dwarf_info (w, klass, FALSE);
1219 break;
1220 case MONO_TYPE_ARRAY:
1221 break;
1222 case MONO_TYPE_VALUETYPE:
1223 if (klass->enumtype)
1224 emit_class_dwarf_info (w, klass, FALSE);
1225 break;
1226 case MONO_TYPE_GENERICINST:
1227 if (!MONO_TYPE_ISSTRUCT (t))
1228 emit_class_dwarf_info (w, klass, FALSE);
1229 break;
1230 case MONO_TYPE_PTR:
1231 break;
1232 default:
1233 break;
1234 }
1235 }
1236 }
1237
1238 static void
emit_var_type(MonoDwarfWriter * w,MonoType * t)1239 emit_var_type (MonoDwarfWriter *w, MonoType *t)
1240 {
1241 const char *tdie;
1242
1243 tdie = get_type_die (w, t);
1244
1245 emit_symbol_diff (w, tdie, ".Ldebug_info_start", 0);
1246 }
1247
1248 static void
encode_var_location(MonoDwarfWriter * w,MonoInst * ins,guint8 * p,guint8 ** endp)1249 encode_var_location (MonoDwarfWriter *w, MonoInst *ins, guint8 *p, guint8 **endp)
1250 {
1251 /* location */
1252 /* FIXME: This needs a location list, since the args can go from reg->stack */
1253 if (!ins || ins->flags & MONO_INST_IS_DEAD) {
1254 /* gdb treats this as optimized out */
1255 } else if (ins->opcode == OP_REGVAR) {
1256 *p = DW_OP_reg0 + mono_hw_reg_to_dwarf_reg (ins->dreg);
1257 p ++;
1258 } else if (ins->opcode == OP_REGOFFSET) {
1259 *p ++= DW_OP_breg0 + mono_hw_reg_to_dwarf_reg (ins->inst_basereg);
1260 encode_sleb128 (ins->inst_offset, p, &p);
1261 } else {
1262 // FIXME:
1263 *p ++ = DW_OP_reg0;
1264 }
1265
1266 *endp = p;
1267 }
1268
1269 static void
emit_loclist(MonoDwarfWriter * w,MonoInst * ins,guint8 * loclist_begin_addr,guint8 * loclist_end_addr,guint8 * expr,guint32 expr_len)1270 emit_loclist (MonoDwarfWriter *w, MonoInst *ins,
1271 guint8 *loclist_begin_addr, guint8 *loclist_end_addr,
1272 guint8 *expr, guint32 expr_len)
1273 {
1274 char label [128];
1275
1276 emit_push_section (w, ".debug_loc", 0);
1277 sprintf (label, ".Lloclist_%d", w->loclist_index ++ );
1278 emit_label (w, label);
1279
1280 emit_pointer_value (w, loclist_begin_addr);
1281 emit_pointer_value (w, loclist_end_addr);
1282 emit_byte (w, expr_len % 256);
1283 emit_byte (w, expr_len / 256);
1284 emit_bytes (w, expr, expr_len);
1285
1286 emit_pointer_value (w, NULL);
1287 emit_pointer_value (w, NULL);
1288
1289 emit_pop_section (w);
1290 emit_symbol_diff (w, label, ".Ldebug_loc_start", 0);
1291 }
1292
1293 /*
1294 * MonoDisHelper->tokener doesn't take an IP argument, and we can't add one since
1295 * it is a public header.
1296 */
1297 static const guint8 *token_handler_ip;
1298
1299 static char*
token_handler(MonoDisHelper * dh,MonoMethod * method,guint32 token)1300 token_handler (MonoDisHelper *dh, MonoMethod *method, guint32 token)
1301 {
1302 MonoError error;
1303 char *res, *desc;
1304 MonoMethod *cmethod;
1305 MonoClass *klass;
1306 MonoClassField *field;
1307 gpointer data = NULL;
1308
1309 if (method->wrapper_type)
1310 data = mono_method_get_wrapper_data (method, token);
1311
1312 switch (*token_handler_ip) {
1313 case CEE_ISINST:
1314 case CEE_CASTCLASS:
1315 case CEE_LDELEMA:
1316 if (method->wrapper_type) {
1317 klass = (MonoClass *)data;
1318 } else {
1319 klass = mono_class_get_checked (method->klass->image, token, &error);
1320 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1321 }
1322 res = g_strdup_printf ("<%s>", klass->name);
1323 break;
1324 case CEE_NEWOBJ:
1325 case CEE_CALL:
1326 case CEE_CALLVIRT:
1327 if (method->wrapper_type) {
1328 cmethod = (MonoMethod *)data;
1329 } else {
1330 MonoError error;
1331 cmethod = mono_get_method_checked (method->klass->image, token, NULL, NULL, &error);
1332 if (!cmethod)
1333 g_error ("Could not load method due to %s", mono_error_get_message (&error)); /* FIXME don't swallow the error */
1334 }
1335 desc = mono_method_full_name (cmethod, TRUE);
1336 res = g_strdup_printf ("<%s>", desc);
1337 g_free (desc);
1338 break;
1339 case CEE_CALLI:
1340 if (method->wrapper_type) {
1341 desc = mono_signature_get_desc ((MonoMethodSignature *)data, FALSE);
1342 res = g_strdup_printf ("<%s>", desc);
1343 g_free (desc);
1344 } else {
1345 res = g_strdup_printf ("<0x%08x>", token);
1346 }
1347 break;
1348 case CEE_LDFLD:
1349 case CEE_LDSFLD:
1350 case CEE_STFLD:
1351 case CEE_STSFLD:
1352 if (method->wrapper_type) {
1353 field = (MonoClassField *)data;
1354 } else {
1355 field = mono_field_from_token_checked (method->klass->image, token, &klass, NULL, &error);
1356 g_assert (mono_error_ok (&error)); /* FIXME error handling */
1357 }
1358 desc = mono_field_full_name (field);
1359 res = g_strdup_printf ("<%s>", desc);
1360 g_free (desc);
1361 break;
1362 default:
1363 res = g_strdup_printf ("<0x%08x>", token);
1364 break;
1365 }
1366
1367 return res;
1368 }
1369
1370 /*
1371 * disasm_ins:
1372 *
1373 * Produce a disassembled form of the IL instruction at IP. This is an extension
1374 * of mono_disasm_code_one () which can disasm tokens, handle wrapper methods, and
1375 * CEE_MONO_ opcodes.
1376 */
1377 static char*
disasm_ins(MonoMethod * method,const guchar * ip,const guint8 ** endip)1378 disasm_ins (MonoMethod *method, const guchar *ip, const guint8 **endip)
1379 {
1380 MonoError error;
1381 char *dis;
1382 MonoDisHelper dh;
1383 MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1384 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1385
1386 memset (&dh, 0, sizeof (dh));
1387 dh.newline = "";
1388 dh.label_format = "IL_%04x: ";
1389 dh.label_target = "IL_%04x";
1390 dh.tokener = token_handler;
1391
1392 token_handler_ip = ip;
1393 if (*ip == MONO_CUSTOM_PREFIX) {
1394 guint32 token;
1395 gpointer data;
1396
1397 switch (ip [1]) {
1398 case CEE_MONO_ICALL: {
1399 MonoJitICallInfo *info;
1400
1401 token = read32 (ip + 2);
1402 data = mono_method_get_wrapper_data (method, token);
1403 info = mono_find_jit_icall_by_addr (data);
1404 g_assert (info);
1405
1406 dis = g_strdup_printf ("IL_%04x: mono_icall <%s>", (int)(ip - header->code), info->name);
1407 ip += 6;
1408 break;
1409 }
1410 case CEE_MONO_CLASSCONST: {
1411 token = read32 (ip + 2);
1412 data = mono_method_get_wrapper_data (method, token);
1413
1414 dis = g_strdup_printf ("IL_%04x: mono_classconst <%s>", (int)(ip - header->code), ((MonoClass*)data)->name);
1415 ip += 6;
1416 break;
1417 }
1418 default:
1419 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1420 }
1421 } else {
1422 dis = mono_disasm_code_one (&dh, method, ip, &ip);
1423 }
1424 token_handler_ip = NULL;
1425
1426 *endip = ip;
1427 mono_metadata_free_mh (header);
1428 return dis;
1429 }
1430
1431 static gint32
il_offset_from_address(MonoMethod * method,MonoDebugMethodJitInfo * jit,guint32 native_offset)1432 il_offset_from_address (MonoMethod *method, MonoDebugMethodJitInfo *jit,
1433 guint32 native_offset)
1434 {
1435 int i;
1436
1437 if (!jit->line_numbers)
1438 return -1;
1439
1440 for (i = jit->num_line_numbers - 1; i >= 0; i--) {
1441 MonoDebugLineNumberEntry lne = jit->line_numbers [i];
1442
1443 if (lne.native_offset <= native_offset)
1444 return lne.il_offset;
1445 }
1446
1447 return -1;
1448 }
1449
1450 static int max_special_addr_diff = 0;
1451
1452 static inline void
emit_advance_op(MonoDwarfWriter * w,int line_diff,int addr_diff)1453 emit_advance_op (MonoDwarfWriter *w, int line_diff, int addr_diff)
1454 {
1455 gint64 opcode = 0;
1456
1457 /* Use a special opcode if possible */
1458 if (line_diff - LINE_BASE >= 0 && line_diff - LINE_BASE < LINE_RANGE) {
1459 if (max_special_addr_diff == 0)
1460 max_special_addr_diff = (255 - OPCODE_BASE) / LINE_RANGE;
1461
1462 if (addr_diff > max_special_addr_diff && (addr_diff < 2 * max_special_addr_diff)) {
1463 emit_byte (w, DW_LNS_const_add_pc);
1464 addr_diff -= max_special_addr_diff;
1465 }
1466
1467 opcode = (line_diff - LINE_BASE) + (LINE_RANGE * addr_diff) + OPCODE_BASE;
1468 if (opcode > 255)
1469 opcode = 0;
1470 }
1471
1472 if (opcode != 0) {
1473 emit_byte (w, opcode);
1474 } else {
1475 //printf ("large: %d %d %d\n", line_diff, addr_diff, max_special_addr_diff);
1476 emit_byte (w, DW_LNS_advance_line);
1477 emit_sleb128 (w, line_diff);
1478 emit_byte (w, DW_LNS_advance_pc);
1479 emit_sleb128 (w, addr_diff);
1480 emit_byte (w, DW_LNS_copy);
1481 }
1482 }
1483
1484 static gint
compare_lne(MonoDebugLineNumberEntry * a,MonoDebugLineNumberEntry * b)1485 compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
1486 {
1487 if (a->native_offset == b->native_offset)
1488 return a->il_offset - b->il_offset;
1489 else
1490 return a->native_offset - b->native_offset;
1491 }
1492
1493 static void
emit_line_number_info(MonoDwarfWriter * w,MonoMethod * method,char * start_symbol,char * end_symbol,guint8 * code,guint32 code_size,MonoDebugMethodJitInfo * debug_info)1494 emit_line_number_info (MonoDwarfWriter *w, MonoMethod *method,
1495 char *start_symbol, char *end_symbol,
1496 guint8 *code, guint32 code_size,
1497 MonoDebugMethodJitInfo *debug_info)
1498 {
1499 MonoError error;
1500 guint32 prev_line = 0;
1501 guint32 prev_native_offset = 0;
1502 int i, file_index, il_offset, prev_il_offset;
1503 gboolean first = TRUE;
1504 MonoDebugSourceLocation *loc;
1505 char *prev_file_name = NULL;
1506 MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
1507 MonoDebugMethodInfo *minfo;
1508 MonoDebugLineNumberEntry *ln_array;
1509 int *native_to_il_offset = NULL;
1510
1511 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1512
1513 if (!w->emit_line) {
1514 mono_metadata_free_mh (header);
1515 return;
1516 }
1517
1518 minfo = mono_debug_lookup_method (method);
1519
1520 /* Compute the native->IL offset mapping */
1521
1522 g_assert (code_size);
1523
1524 ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
1525 memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
1526
1527 qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (int (*)(const void *, const void *))compare_lne);
1528
1529 native_to_il_offset = g_new0 (int, code_size + 1);
1530
1531 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1532 int j;
1533 MonoDebugLineNumberEntry *lne = &ln_array [i];
1534
1535 if (i == 0) {
1536 for (j = 0; j < lne->native_offset; ++j)
1537 native_to_il_offset [j] = -1;
1538 }
1539
1540 if (i < debug_info->num_line_numbers - 1) {
1541 MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
1542
1543 for (j = lne->native_offset; j < lne_next->native_offset; ++j)
1544 native_to_il_offset [j] = lne->il_offset;
1545 } else {
1546 for (j = lne->native_offset; j < code_size; ++j)
1547 native_to_il_offset [j] = lne->il_offset;
1548 }
1549 }
1550 g_free (ln_array);
1551
1552 prev_line = 1;
1553 prev_il_offset = -1;
1554
1555 w->cur_file_index = -1;
1556 for (i = 0; i < code_size; ++i) {
1557 int line_diff, addr_diff;
1558
1559 if (!minfo)
1560 continue;
1561
1562 if (!debug_info->line_numbers)
1563 continue;
1564
1565 if (native_to_il_offset)
1566 il_offset = native_to_il_offset [i];
1567 else
1568 il_offset = il_offset_from_address (method, debug_info, i);
1569 /*
1570 il_offset = il_offset_from_address (method, debug_info, i);
1571
1572 g_assert (il_offset == native_to_il_offset [i]);
1573 */
1574
1575 il_offset = native_to_il_offset [i];
1576 if (il_offset < 0)
1577 continue;
1578
1579 if (il_offset == prev_il_offset)
1580 continue;
1581
1582 prev_il_offset = il_offset;
1583
1584 loc = mono_debug_method_lookup_location (minfo, il_offset);
1585 if (!loc)
1586 continue;
1587 if (!loc->source_file) {
1588 mono_debug_free_source_location (loc);
1589 continue;
1590 }
1591
1592 line_diff = (gint32)loc->row - (gint32)prev_line;
1593 addr_diff = i - prev_native_offset;
1594
1595 if (first) {
1596 emit_section_change (w, ".debug_line", 0);
1597
1598 emit_byte (w, 0);
1599 emit_byte (w, sizeof (gpointer) + 1);
1600 emit_byte (w, DW_LNE_set_address);
1601 if (start_symbol)
1602 emit_pointer_unaligned (w, start_symbol);
1603 else
1604 emit_pointer_value (w, code);
1605 first = FALSE;
1606 }
1607
1608 if (loc->row != prev_line) {
1609 if (!prev_file_name || strcmp (loc->source_file, prev_file_name) != 0) {
1610 /* Add an entry to the file table */
1611 /* FIXME: Avoid duplicates */
1612 file_index = get_line_number_file_name (w, loc->source_file) + 1;
1613 g_free (prev_file_name);
1614 prev_file_name = g_strdup (loc->source_file);
1615
1616 if (w->cur_file_index != file_index) {
1617 emit_byte (w, DW_LNS_set_file);
1618 emit_uleb128 (w, file_index);
1619 emit_byte (w, DW_LNS_copy);
1620 w->cur_file_index = file_index;
1621 }
1622 }
1623 }
1624
1625 if (loc->row != prev_line) {
1626 if (prev_native_offset == 0)
1627 emit_byte (w, DW_LNE_set_prologue_end);
1628
1629 //printf ("X: %p(+0x%x) %d %s:%d(+%d)\n", code + i, addr_diff, loc->il_offset, loc->source_file, loc->row, line_diff);
1630 emit_advance_op (w, line_diff, addr_diff);
1631
1632 prev_line = loc->row;
1633 prev_native_offset = i;
1634 }
1635
1636 mono_debug_free_source_location (loc);
1637 first = FALSE;
1638 }
1639
1640 g_free (native_to_il_offset);
1641 g_free (prev_file_name);
1642
1643 if (!first) {
1644 emit_byte (w, DW_LNS_advance_pc);
1645 emit_sleb128 (w, code_size - prev_native_offset);
1646 emit_byte (w, DW_LNS_copy);
1647
1648 emit_byte (w, 0);
1649 emit_byte (w, 1);
1650 emit_byte (w, DW_LNE_end_sequence);
1651 } else if (!start_symbol) {
1652 /* No debug info, XDEBUG mode */
1653 char *name, *dis;
1654 const guint8 *ip = header->code;
1655 int prev_line, prev_native_offset;
1656 int *il_to_line;
1657
1658 /*
1659 * Emit the IL code into a temporary file and emit line number info
1660 * referencing that file.
1661 */
1662
1663 name = mono_method_full_name (method, TRUE);
1664 fprintf (w->il_file, "// %s\n", name);
1665 w->il_file_line_index ++;
1666 g_free (name);
1667
1668 il_to_line = g_new0 (int, header->code_size);
1669
1670 emit_section_change (w, ".debug_line", 0);
1671 emit_byte (w, 0);
1672 emit_byte (w, sizeof (gpointer) + 1);
1673 emit_byte (w, DW_LNE_set_address);
1674 emit_pointer_value (w, code);
1675
1676 // FIXME: Optimize this
1677 while (ip < header->code + header->code_size) {
1678 int il_offset = ip - header->code;
1679
1680 /* Emit IL */
1681 w->il_file_line_index ++;
1682
1683 dis = disasm_ins (method, ip, &ip);
1684 fprintf (w->il_file, "%s\n", dis);
1685 g_free (dis);
1686
1687 il_to_line [il_offset] = w->il_file_line_index;
1688 }
1689
1690 /* Emit line number info */
1691 prev_line = 1;
1692 prev_native_offset = 0;
1693 for (i = 0; i < debug_info->num_line_numbers; ++i) {
1694 MonoDebugLineNumberEntry *lne = &debug_info->line_numbers [i];
1695 int line;
1696
1697 if (lne->il_offset >= header->code_size)
1698 continue;
1699 line = il_to_line [lne->il_offset];
1700 if (!line) {
1701 /*
1702 * This seems to happen randomly, it looks like il_offset points
1703 * into the middle of an instruction.
1704 */
1705 continue;
1706 /*
1707 printf ("%s\n", mono_method_full_name (method, TRUE));
1708 printf ("%d %d\n", lne->il_offset, header->code_size);
1709 g_assert (line);
1710 */
1711 }
1712
1713 if (line - prev_line != 0) {
1714 emit_advance_op (w, line - prev_line, (gint32)lne->native_offset - prev_native_offset);
1715
1716 prev_line = line;
1717 prev_native_offset = lne->native_offset;
1718 }
1719 }
1720
1721 emit_byte (w, DW_LNS_advance_pc);
1722 emit_sleb128 (w, code_size - prev_native_offset);
1723 emit_byte (w, DW_LNS_copy);
1724
1725 emit_byte (w, 0);
1726 emit_byte (w, 1);
1727 emit_byte (w, DW_LNE_end_sequence);
1728
1729 fflush (w->il_file);
1730 g_free (il_to_line);
1731 }
1732 mono_metadata_free_mh (header);
1733 }
1734
1735 static MonoMethodVar*
find_vmv(MonoCompile * cfg,MonoInst * ins)1736 find_vmv (MonoCompile *cfg, MonoInst *ins)
1737 {
1738 int j;
1739
1740 if (cfg->varinfo) {
1741 for (j = 0; j < cfg->num_varinfo; ++j) {
1742 if (cfg->varinfo [j] == ins)
1743 break;
1744 }
1745
1746 if (j < cfg->num_varinfo) {
1747 return MONO_VARINFO (cfg, j);
1748 }
1749 }
1750
1751 return NULL;
1752 }
1753
1754 void
mono_dwarf_writer_emit_method(MonoDwarfWriter * w,MonoCompile * cfg,MonoMethod * method,char * start_symbol,char * end_symbol,char * linkage_name,guint8 * code,guint32 code_size,MonoInst ** args,MonoInst ** locals,GSList * unwind_info,MonoDebugMethodJitInfo * debug_info)1755 mono_dwarf_writer_emit_method (MonoDwarfWriter *w, MonoCompile *cfg, MonoMethod *method, char *start_symbol, char *end_symbol, char *linkage_name,
1756 guint8 *code, guint32 code_size, MonoInst **args, MonoInst **locals, GSList *unwind_info, MonoDebugMethodJitInfo *debug_info)
1757 {
1758 MonoError error;
1759 char *name;
1760 MonoMethodSignature *sig;
1761 MonoMethodHeader *header;
1762 char **names;
1763 MonoDebugLocalsInfo *locals_info;
1764 MonoDebugMethodInfo *minfo;
1765 MonoDebugSourceLocation *loc = NULL;
1766 int i;
1767 guint8 buf [128];
1768 guint8 *p;
1769
1770 emit_section_change (w, ".debug_info", 0);
1771
1772 sig = mono_method_signature (method);
1773 header = mono_method_get_header_checked (method, &error);
1774 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1775
1776 /* Parameter types */
1777 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1778 MonoType *t;
1779
1780 if (i == 0 && sig->hasthis) {
1781 if (method->klass->valuetype)
1782 t = &method->klass->this_arg;
1783 else
1784 t = &method->klass->byval_arg;
1785 } else {
1786 t = sig->params [i - sig->hasthis];
1787 }
1788
1789 emit_type (w, t);
1790 }
1791 //emit_type (w, &mono_defaults.int32_class->byval_arg);
1792
1793 /* Local types */
1794 for (i = 0; i < header->num_locals; ++i) {
1795 emit_type (w, header->locals [i]);
1796 }
1797
1798 minfo = mono_debug_lookup_method (method);
1799 if (minfo)
1800 loc = mono_debug_method_lookup_location (minfo, 0);
1801
1802 /* Subprogram */
1803 names = g_new0 (char *, sig->param_count);
1804 mono_method_get_param_names (method, (const char **) names);
1805
1806 emit_uleb128 (w, ABBREV_SUBPROGRAM);
1807 /* DW_AT_name */
1808 name = mono_method_full_name (method, FALSE);
1809 emit_escaped_string (w, name);
1810 /* DW_AT_MIPS_linkage_name */
1811 if (linkage_name)
1812 emit_string (w, linkage_name);
1813 else
1814 emit_string (w, "");
1815 /* DW_AT_decl_file/DW_AT_decl_line */
1816 if (loc) {
1817 int file_index = add_line_number_file_name (w, loc->source_file, 0, 0);
1818 emit_uleb128 (w, file_index + 1);
1819 emit_uleb128 (w, loc->row);
1820
1821 mono_debug_free_source_location (loc);
1822 loc = NULL;
1823 } else {
1824 emit_uleb128 (w, 0);
1825 emit_uleb128 (w, 0);
1826 }
1827 #ifndef TARGET_IOS
1828 emit_string (w, name);
1829 #endif
1830 g_free (name);
1831 if (start_symbol) {
1832 emit_pointer_unaligned (w, start_symbol);
1833 emit_pointer_unaligned (w, end_symbol);
1834 } else {
1835 emit_pointer_value (w, code);
1836 emit_pointer_value (w, code + code_size);
1837 }
1838 /* frame_base */
1839 emit_byte (w, 2);
1840 emit_byte (w, DW_OP_breg6);
1841 emit_byte (w, 16);
1842
1843 /* Parameters */
1844 for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
1845 MonoInst *arg = args ? args [i] : NULL;
1846 MonoType *t;
1847 const char *pname;
1848 char pname_buf [128];
1849 MonoMethodVar *vmv = NULL;
1850 gboolean need_loclist = FALSE;
1851
1852 vmv = find_vmv (cfg, arg);
1853 if (code && vmv && (vmv->live_range_start || vmv->live_range_end))
1854 need_loclist = TRUE;
1855
1856 if (i == 0 && sig->hasthis) {
1857 if (method->klass->valuetype)
1858 t = &method->klass->this_arg;
1859 else
1860 t = &method->klass->byval_arg;
1861 pname = "this";
1862 } else {
1863 t = sig->params [i - sig->hasthis];
1864 pname = names [i - sig->hasthis];
1865 }
1866
1867 emit_uleb128 (w, need_loclist ? ABBREV_PARAM_LOCLIST : ABBREV_PARAM);
1868 /* name */
1869 if (pname[0] == '\0') {
1870 sprintf (pname_buf, "param%d", i - sig->hasthis);
1871 pname = pname_buf;
1872 }
1873 emit_string (w, pname);
1874 /* type */
1875 if (!arg || arg->flags & MONO_INST_IS_DEAD)
1876 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1877 else
1878 emit_var_type (w, t);
1879
1880 p = buf;
1881 encode_var_location (w, arg, p, &p);
1882 if (need_loclist) {
1883 vmv->live_range_start = 0;
1884 if (vmv->live_range_end == 0)
1885 /* FIXME: Uses made in calls are not recorded */
1886 vmv->live_range_end = code_size;
1887 emit_loclist (w, arg, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1888 } else {
1889 emit_byte (w, p - buf);
1890 emit_bytes (w, buf, p - buf);
1891 }
1892 }
1893 g_free (names);
1894
1895 /* Locals */
1896 locals_info = mono_debug_lookup_locals (method);
1897
1898 for (i = 0; i < header->num_locals; ++i) {
1899 MonoInst *ins = locals [i];
1900 char name_buf [128];
1901 int j;
1902 MonoMethodVar *vmv = NULL;
1903 gboolean need_loclist = FALSE;
1904 char *lname;
1905
1906 /* ins->dreg no longer contains the original vreg */
1907 vmv = find_vmv (cfg, ins);
1908 if (code && vmv) {
1909 if (vmv->live_range_start) {
1910 /* This variable has a precise live range */
1911 need_loclist = TRUE;
1912 }
1913 }
1914
1915 emit_uleb128 (w, need_loclist ? ABBREV_VARIABLE_LOCLIST : ABBREV_VARIABLE);
1916 /* name */
1917 lname = NULL;
1918 if (locals_info) {
1919 for (j = 0; j < locals_info->num_locals; ++j)
1920 if (locals_info->locals [j].index == i)
1921 break;
1922 if (j < locals_info->num_locals)
1923 lname = locals_info->locals [j].name;
1924 }
1925 if (lname) {
1926 emit_string (w, lname);
1927 } else {
1928 sprintf (name_buf, "V_%d", i);
1929 emit_string (w, name_buf);
1930 }
1931 /* type */
1932 if (!ins || ins->flags & MONO_INST_IS_DEAD)
1933 emit_var_type (w, &mono_defaults.int32_class->byval_arg);
1934 else
1935 emit_var_type (w, header->locals [i]);
1936
1937 p = buf;
1938 encode_var_location (w, ins, p, &p);
1939
1940 if (need_loclist) {
1941 if (vmv->live_range_end == 0)
1942 /* FIXME: Uses made in calls are not recorded */
1943 vmv->live_range_end = code_size;
1944 emit_loclist (w, ins, code + vmv->live_range_start, code + vmv->live_range_end, buf, p - buf);
1945 } else {
1946 emit_byte (w, p - buf);
1947 emit_bytes (w, buf, p - buf);
1948 }
1949 }
1950
1951 if (locals_info)
1952 mono_debug_free_locals (locals_info);
1953
1954 /* Subprogram end */
1955 emit_uleb128 (w, 0x0);
1956
1957 emit_line (w);
1958
1959 emit_debug_info_end (w);
1960
1961 /* Emit unwind info */
1962 if (unwind_info) {
1963 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, TRUE);
1964 w->fde_index ++;
1965 }
1966
1967 /* Save the information needed to emit the line number info later at once */
1968 /* != could happen when using --regression */
1969 if (debug_info && (debug_info->code_start == code)) {
1970 MethodLineNumberInfo *info;
1971
1972 info = g_new0 (MethodLineNumberInfo, 1);
1973 info->method = method;
1974 info->start_symbol = g_strdup (start_symbol);
1975 info->end_symbol = g_strdup (end_symbol);
1976 info->code = code;
1977 info->code_size = code_size;
1978 w->line_info = g_slist_prepend (w->line_info, info);
1979 }
1980
1981 emit_line (w);
1982 mono_metadata_free_mh (header);
1983 }
1984
1985 void
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)1986 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)
1987 {
1988 emit_section_change (w, ".debug_info", 0);
1989
1990 /* Subprogram */
1991 emit_uleb128 (w, ABBREV_TRAMP_SUBPROGRAM);
1992 emit_string (w, tramp_name);
1993 emit_pointer_value (w, code);
1994 emit_pointer_value (w, code + code_size);
1995
1996 /* Subprogram end */
1997 emit_uleb128 (w, 0x0);
1998
1999 emit_debug_info_end (w);
2000
2001 /* Emit unwind info */
2002 emit_fde (w, w->fde_index, start_symbol, end_symbol, code, code_size, unwind_info, FALSE);
2003 w->fde_index ++;
2004 }
2005
2006 #else /* !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
2007
2008 MONO_EMPTY_SOURCE_FILE (dwarfwriter);
2009
2010 #endif /* End of: !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
2011