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small scopes cleanup etc.
[tinycc.git] / tccdbg.c
blobf63ab4b7fe3b8609f19802a2ea86ee2d0d31f81b
1 /*
2 * TCC - Tiny C Compiler
3 *
4 * Copyright (c) 2001-2004 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include "tcc.h"
22
23 /* stab debug support */
24
25 static const struct {
26 int type;
27 int size;
28 int encoding;
29 const char *name;
30 } default_debug[] = {
31 { VT_INT, 4, DW_ATE_signed, "int:t1=r1;-2147483648;2147483647;" },
32 { VT_BYTE, 1, DW_ATE_signed_char, "char:t2=r2;0;127;" },
33 #if LONG_SIZE == 4
34 { VT_LONG | VT_INT, 4, DW_ATE_signed, "long int:t3=r3;-2147483648;2147483647;" },
35 #else
36 { VT_LLONG | VT_LONG, 8, DW_ATE_signed, "long int:t3=r3;-9223372036854775808;9223372036854775807;" },
37 #endif
38 { VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "unsigned int:t4=r4;0;037777777777;" },
39 #if LONG_SIZE == 4
40 { VT_LONG | VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "long unsigned int:t5=r5;0;037777777777;" },
41 #else
42 /* use octal instead of -1 so size_t works (-gstabs+ in gcc) */
43 { VT_LLONG | VT_LONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t5=r5;0;01777777777777777777777;" },
44 #endif
45 { VT_QLONG, 16, DW_ATE_signed, "__int128:t6=r6;0;-1;" },
46 { VT_QLONG | VT_UNSIGNED, 16, DW_ATE_unsigned, "__int128 unsigned:t7=r7;0;-1;" },
47 { VT_LLONG, 8, DW_ATE_signed, "long long int:t8=r8;-9223372036854775808;9223372036854775807;" },
48 { VT_LLONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long long unsigned int:t9=r9;0;01777777777777777777777;" },
49 { VT_SHORT, 2, DW_ATE_signed, "short int:t10=r10;-32768;32767;" },
50 { VT_SHORT | VT_UNSIGNED, 2, DW_ATE_unsigned, "short unsigned int:t11=r11;0;65535;" },
51 { VT_BYTE | VT_DEFSIGN, 1, DW_ATE_signed_char, "signed char:t12=r12;-128;127;" },
52 { VT_BYTE | VT_DEFSIGN | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t13=r13;0;255;" },
53 { VT_FLOAT, 4, DW_ATE_float, "float:t14=r1;4;0;" },
54 { VT_DOUBLE, 8, DW_ATE_float, "double:t15=r1;8;0;" },
55 #ifdef TCC_USING_DOUBLE_FOR_LDOUBLE
56 { VT_DOUBLE | VT_LONG, 8, DW_ATE_float, "long double:t16=r1;8;0;" },
57 #else
58 { VT_LDOUBLE, 16, DW_ATE_float, "long double:t16=r1;16;0;" },
59 #endif
60 { -1, -1, -1, "_Float32:t17=r1;4;0;" },
61 { -1, -1, -1, "_Float64:t18=r1;8;0;" },
62 { -1, -1, -1, "_Float128:t19=r1;16;0;" },
63 { -1, -1, -1, "_Float32x:t20=r1;8;0;" },
64 { -1, -1, -1, "_Float64x:t21=r1;16;0;" },
65 { -1, -1, -1, "_Decimal32:t22=r1;4;0;" },
66 { -1, -1, -1, "_Decimal64:t23=r1;8;0;" },
67 { -1, -1, -1, "_Decimal128:t24=r1;16;0;" },
68 /* if default char is unsigned */
69 { VT_BYTE | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t25=r25;0;255;" },
70 /* boolean type */
71 { VT_BOOL, 1, DW_ATE_boolean, "bool:t26=r26;0;255;" },
72 #if LONG_SIZE == 4
73 { VT_VOID, 1, DW_ATE_unsigned_char, "void:t27=27" },
74 #else
75 /* bitfields use these */
76 { VT_LONG | VT_INT, 8, DW_ATE_signed, "long int:t27=r27;-9223372036854775808;9223372036854775807;" },
77 { VT_LONG | VT_INT | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t28=r28;0;01777777777777777777777;" },
78 { VT_VOID, 1, DW_ATE_unsigned_char, "void:t29=29" },
79 #endif
80 };
81
82 #define N_DEFAULT_DEBUG (sizeof (default_debug) / sizeof (default_debug[0]))
83
84 /* dwarf debug */
85
86 #define DWARF_LINE_BASE -5
87 #define DWARF_LINE_RANGE 14
88 #define DWARF_OPCODE_BASE 13
89
90 #if defined TCC_TARGET_ARM64
91 #define DWARF_MIN_INSTR_LEN 4
92 #elif defined TCC_TARGET_ARM
93 #define DWARF_MIN_INSTR_LEN 2
94 #else
95 #define DWARF_MIN_INSTR_LEN 1
96 #endif
97
98 #define DWARF_ABBREV_COMPILE_UNIT 1
99 #define DWARF_ABBREV_BASE_TYPE 2
100 #define DWARF_ABBREV_VARIABLE_EXTERNAL 3
101 #define DWARF_ABBREV_VARIABLE_STATIC 4
102 #define DWARF_ABBREV_VARIABLE_LOCAL 5
103 #define DWARF_ABBREV_FORMAL_PARAMETER 6
104 #define DWARF_ABBREV_POINTER 7
105 #define DWARF_ABBREV_ARRAY_TYPE 8
106 #define DWARF_ABBREV_SUBRANGE_TYPE 9
107 #define DWARF_ABBREV_TYPEDEF 10
108 #define DWARF_ABBREV_ENUMERATOR_SIGNED 11
109 #define DWARF_ABBREV_ENUMERATOR_UNSIGNED 12
110 #define DWARF_ABBREV_ENUMERATION_TYPE 13
111 #define DWARF_ABBREV_MEMBER 14
112 #define DWARF_ABBREV_MEMBER_BF 15
113 #define DWARF_ABBREV_STRUCTURE_TYPE 16
114 #define DWARF_ABBREV_STRUCTURE_EMPTY_TYPE 17
115 #define DWARF_ABBREV_UNION_TYPE 18
116 #define DWARF_ABBREV_UNION_EMPTY_TYPE 19
117 #define DWARF_ABBREV_SUBPROGRAM_EXTERNAL 20
118 #define DWARF_ABBREV_SUBPROGRAM_STATIC 21
119 #define DWARF_ABBREV_LEXICAL_BLOCK 22
120 #define DWARF_ABBREV_LEXICAL_EMPTY_BLOCK 23
121 #define DWARF_ABBREV_SUBROUTINE_TYPE 24
122 #define DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE 25
123 #define DWARF_ABBREV_FORMAL_PARAMETER2 26
124
125 /* all entries should have been generated with dwarf_uleb128 except
126 has_children. All values are currently below 128 so this currently
127 works. */
128 static const unsigned char dwarf_abbrev_init[] = {
129 DWARF_ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, 1,
130 DW_AT_producer, DW_FORM_strp,
131 DW_AT_language, DW_FORM_data1,
132 DW_AT_name, DW_FORM_line_strp,
133 DW_AT_comp_dir, DW_FORM_line_strp,
134 DW_AT_low_pc, DW_FORM_addr,
135 #if PTR_SIZE == 4
136 DW_AT_high_pc, DW_FORM_data4,
137 #else
138 DW_AT_high_pc, DW_FORM_data8,
139 #endif
140 DW_AT_stmt_list, DW_FORM_sec_offset,
141 0, 0,
142 DWARF_ABBREV_BASE_TYPE, DW_TAG_base_type, 0,
143 DW_AT_byte_size, DW_FORM_udata,
144 DW_AT_encoding, DW_FORM_data1,
145 DW_AT_name, DW_FORM_strp,
146 0, 0,
147 DWARF_ABBREV_VARIABLE_EXTERNAL, DW_TAG_variable, 0,
148 DW_AT_name, DW_FORM_strp,
149 DW_AT_decl_file, DW_FORM_udata,
150 DW_AT_decl_line, DW_FORM_udata,
151 DW_AT_type, DW_FORM_ref4,
152 DW_AT_external, DW_FORM_flag,
153 DW_AT_location, DW_FORM_exprloc,
154 0, 0,
155 DWARF_ABBREV_VARIABLE_STATIC, DW_TAG_variable, 0,
156 DW_AT_name, DW_FORM_strp,
157 DW_AT_decl_file, DW_FORM_udata,
158 DW_AT_decl_line, DW_FORM_udata,
159 DW_AT_type, DW_FORM_ref4,
160 DW_AT_location, DW_FORM_exprloc,
161 0, 0,
162 DWARF_ABBREV_VARIABLE_LOCAL, DW_TAG_variable, 0,
163 DW_AT_name, DW_FORM_strp,
164 DW_AT_type, DW_FORM_ref4,
165 DW_AT_location, DW_FORM_exprloc,
166 0, 0,
167 DWARF_ABBREV_FORMAL_PARAMETER, DW_TAG_formal_parameter, 0,
168 DW_AT_name, DW_FORM_strp,
169 DW_AT_type, DW_FORM_ref4,
170 DW_AT_location, DW_FORM_exprloc,
171 0, 0,
172 DWARF_ABBREV_POINTER, DW_TAG_pointer_type, 0,
173 DW_AT_byte_size, DW_FORM_data1,
174 DW_AT_type, DW_FORM_ref4,
175 0, 0,
176 DWARF_ABBREV_ARRAY_TYPE, DW_TAG_array_type, 1,
177 DW_AT_type, DW_FORM_ref4,
178 DW_AT_sibling, DW_FORM_ref4,
179 0, 0,
180 DWARF_ABBREV_SUBRANGE_TYPE, DW_TAG_subrange_type, 0,
181 DW_AT_type, DW_FORM_ref4,
182 DW_AT_upper_bound, DW_FORM_udata,
183 0, 0,
184 DWARF_ABBREV_TYPEDEF, DW_TAG_typedef, 0,
185 DW_AT_name, DW_FORM_strp,
186 DW_AT_decl_file, DW_FORM_udata,
187 DW_AT_decl_line, DW_FORM_udata,
188 DW_AT_type, DW_FORM_ref4,
189 0, 0,
190 DWARF_ABBREV_ENUMERATOR_SIGNED, DW_TAG_enumerator, 0,
191 DW_AT_name, DW_FORM_strp,
192 DW_AT_const_value, DW_FORM_sdata,
193 0, 0,
194 DWARF_ABBREV_ENUMERATOR_UNSIGNED, DW_TAG_enumerator, 0,
195 DW_AT_name, DW_FORM_strp,
196 DW_AT_const_value, DW_FORM_udata,
197 0, 0,
198 DWARF_ABBREV_ENUMERATION_TYPE, DW_TAG_enumeration_type, 1,
199 DW_AT_name, DW_FORM_strp,
200 DW_AT_encoding, DW_FORM_data1,
201 DW_AT_byte_size, DW_FORM_data1,
202 DW_AT_type, DW_FORM_ref4,
203 DW_AT_decl_file, DW_FORM_udata,
204 DW_AT_decl_line, DW_FORM_udata,
205 DW_AT_sibling, DW_FORM_ref4,
206 0, 0,
207 DWARF_ABBREV_MEMBER, DW_TAG_member, 0,
208 DW_AT_name, DW_FORM_strp,
209 DW_AT_decl_file, DW_FORM_udata,
210 DW_AT_decl_line, DW_FORM_udata,
211 DW_AT_type, DW_FORM_ref4,
212 DW_AT_data_member_location, DW_FORM_udata,
213 0, 0,
214 DWARF_ABBREV_MEMBER_BF, DW_TAG_member, 0,
215 DW_AT_name, DW_FORM_strp,
216 DW_AT_decl_file, DW_FORM_udata,
217 DW_AT_decl_line, DW_FORM_udata,
218 DW_AT_type, DW_FORM_ref4,
219 DW_AT_bit_size, DW_FORM_udata,
220 DW_AT_data_bit_offset, DW_FORM_udata,
221 0, 0,
222 DWARF_ABBREV_STRUCTURE_TYPE, DW_TAG_structure_type, 1,
223 DW_AT_name, DW_FORM_strp,
224 DW_AT_byte_size, DW_FORM_udata,
225 DW_AT_decl_file, DW_FORM_udata,
226 DW_AT_decl_line, DW_FORM_udata,
227 DW_AT_sibling, DW_FORM_ref4,
228 0, 0,
229 DWARF_ABBREV_STRUCTURE_EMPTY_TYPE, DW_TAG_structure_type, 0,
230 DW_AT_name, DW_FORM_strp,
231 DW_AT_byte_size, DW_FORM_udata,
232 DW_AT_decl_file, DW_FORM_udata,
233 DW_AT_decl_line, DW_FORM_udata,
234 0, 0,
235 DWARF_ABBREV_UNION_TYPE, DW_TAG_union_type, 1,
236 DW_AT_name, DW_FORM_strp,
237 DW_AT_byte_size, DW_FORM_udata,
238 DW_AT_decl_file, DW_FORM_udata,
239 DW_AT_decl_line, DW_FORM_udata,
240 DW_AT_sibling, DW_FORM_ref4,
241 0, 0,
242 DWARF_ABBREV_UNION_EMPTY_TYPE, DW_TAG_union_type, 0,
243 DW_AT_name, DW_FORM_strp,
244 DW_AT_byte_size, DW_FORM_udata,
245 DW_AT_decl_file, DW_FORM_udata,
246 DW_AT_decl_line, DW_FORM_udata,
247 0, 0,
248 DWARF_ABBREV_SUBPROGRAM_EXTERNAL, DW_TAG_subprogram, 1,
249 DW_AT_external, DW_FORM_flag,
250 DW_AT_name, DW_FORM_strp,
251 DW_AT_decl_file, DW_FORM_udata,
252 DW_AT_decl_line, DW_FORM_udata,
253 DW_AT_type, DW_FORM_ref4,
254 DW_AT_low_pc, DW_FORM_addr,
255 #if PTR_SIZE == 4
256 DW_AT_high_pc, DW_FORM_data4,
257 #else
258 DW_AT_high_pc, DW_FORM_data8,
259 #endif
260 DW_AT_sibling, DW_FORM_ref4,
261 DW_AT_frame_base, DW_FORM_exprloc,
262 0, 0,
263 DWARF_ABBREV_SUBPROGRAM_STATIC, DW_TAG_subprogram, 1,
264 DW_AT_name, DW_FORM_strp,
265 DW_AT_decl_file, DW_FORM_udata,
266 DW_AT_decl_line, DW_FORM_udata,
267 DW_AT_type, DW_FORM_ref4,
268 DW_AT_low_pc, DW_FORM_addr,
269 #if PTR_SIZE == 4
270 DW_AT_high_pc, DW_FORM_data4,
271 #else
272 DW_AT_high_pc, DW_FORM_data8,
273 #endif
274 DW_AT_sibling, DW_FORM_ref4,
275 DW_AT_frame_base, DW_FORM_exprloc,
276 0, 0,
277 DWARF_ABBREV_LEXICAL_BLOCK, DW_TAG_lexical_block, 1,
278 DW_AT_low_pc, DW_FORM_addr,
279 #if PTR_SIZE == 4
280 DW_AT_high_pc, DW_FORM_data4,
281 #else
282 DW_AT_high_pc, DW_FORM_data8,
283 #endif
284 0, 0,
285 DWARF_ABBREV_LEXICAL_EMPTY_BLOCK, DW_TAG_lexical_block, 0,
286 DW_AT_low_pc, DW_FORM_addr,
287 #if PTR_SIZE == 4
288 DW_AT_high_pc, DW_FORM_data4,
289 #else
290 DW_AT_high_pc, DW_FORM_data8,
291 #endif
292 0, 0,
293 DWARF_ABBREV_SUBROUTINE_TYPE, DW_TAG_subroutine_type, 1,
294 DW_AT_type, DW_FORM_ref4,
295 DW_AT_sibling, DW_FORM_ref4,
296 0, 0,
297 DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE, DW_TAG_subroutine_type, 0,
298 DW_AT_type, DW_FORM_ref4,
299 0, 0,
300 DWARF_ABBREV_FORMAL_PARAMETER2, DW_TAG_formal_parameter, 0,
301 DW_AT_type, DW_FORM_ref4,
302 0, 0,
303 0
304 };
305
306 static const unsigned char dwarf_line_opcodes[] = {
307 0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1
308 };
309
310 /* ------------------------------------------------------------------------- */
311 /* debug state */
312
313 struct _tccdbg {
314
315 int last_line_num, new_file;
316 int section_sym;
317
318 int debug_next_type;
319
320 struct _debug_hash {
321 int debug_type;
322 Sym *type;
323 } *debug_hash;
324
325 struct _debug_anon_hash {
326 Sym *type;
327 int n_debug_type;
328 int *debug_type;
329 } *debug_anon_hash;
330
331 int n_debug_hash;
332 int n_debug_anon_hash;
333
334 struct _debug_info {
335 int start;
336 int end;
337 int n_sym;
338 struct debug_sym {
339 int type;
340 unsigned long value;
341 char *str;
342 Section *sec;
343 int sym_index;
344 int info;
345 int file;
346 int line;
347 } *sym;
348 struct _debug_info *child, *next, *last, *parent;
349 } *debug_info, *debug_info_root;
350
351 struct {
352 int info;
353 int abbrev;
354 int line;
355 int str;
356 int line_str;
357 } dwarf_sym;
358
359 struct {
360 int start;
361 int dir_size;
362 char **dir_table;
363 int filename_size;
364 struct dwarf_filename_struct {
365 int dir_entry;
366 char *name;
367 } *filename_table;
368 int line_size;
369 int line_max_size;
370 unsigned char *line_data;
371 int cur_file;
372 int last_file;
373 int last_pc;
374 int last_line;
375 } dwarf_line;
376
377 struct {
378 int start;
379 Sym *func;
380 int line;
381 int base_type_used[N_DEFAULT_DEBUG];
382 } dwarf_info;
383
384 /* test coverage */
385 struct {
386 unsigned long offset;
387 unsigned long last_file_name;
388 unsigned long last_func_name;
389 int ind;
390 int line;
391 } tcov_data;
392
393 };
394
395 #define last_line_num s1->dState->last_line_num
396 #define new_file s1->dState->new_file
397 #define section_sym s1->dState->section_sym
398 #define debug_next_type s1->dState->debug_next_type
399 #define debug_hash s1->dState->debug_hash
400 #define debug_anon_hash s1->dState->debug_anon_hash
401 #define n_debug_hash s1->dState->n_debug_hash
402 #define n_debug_anon_hash s1->dState->n_debug_anon_hash
403 #define debug_info s1->dState->debug_info
404 #define debug_info_root s1->dState->debug_info_root
405 #define dwarf_sym s1->dState->dwarf_sym
406 #define dwarf_line s1->dState->dwarf_line
407 #define dwarf_info s1->dState->dwarf_info
408 #define tcov_data s1->dState->tcov_data
409
410 /* ------------------------------------------------------------------------- */
411 static void put_stabs(TCCState *s1, const char *str, int type, int other,
412 int desc, unsigned long value);
413
414 ST_FUNC void tcc_debug_new(TCCState *s1)
415 {
416 int shf = 0;
417 if (!s1->dState)
418 s1->dState = tcc_mallocz(sizeof *s1->dState);
419 #ifdef CONFIG_TCC_BACKTRACE
420 /* include stab info with standalone backtrace support */
421 if (s1->do_backtrace
422 && (s1->output_type & (TCC_OUTPUT_EXE | TCC_OUTPUT_DLL)))
423 shf = SHF_ALLOC | SHF_WRITE; // SHF_WRITE needed for musl/SELINUX
424 #endif
425 if (s1->dwarf) {
426 s1->dwlo = s1->nb_sections;
427 dwarf_info_section =
428 new_section(s1, ".debug_info", SHT_PROGBITS, shf);
429 dwarf_abbrev_section =
430 new_section(s1, ".debug_abbrev", SHT_PROGBITS, shf);
431 dwarf_line_section =
432 new_section(s1, ".debug_line", SHT_PROGBITS, shf);
433 dwarf_aranges_section =
434 new_section(s1, ".debug_aranges", SHT_PROGBITS, shf);
435 shf |= SHF_MERGE | SHF_STRINGS;
436 dwarf_str_section =
437 new_section(s1, ".debug_str", SHT_PROGBITS, shf);
438 dwarf_str_section->sh_entsize = 1;
439 dwarf_info_section->sh_addralign =
440 dwarf_abbrev_section->sh_addralign =
441 dwarf_line_section->sh_addralign =
442 dwarf_aranges_section->sh_addralign =
443 dwarf_str_section->sh_addralign = 1;
444 if (s1->dwarf >= 5) {
445 dwarf_line_str_section =
446 new_section(s1, ".debug_line_str", SHT_PROGBITS, shf);
447 dwarf_line_str_section->sh_entsize = 1;
448 dwarf_line_str_section->sh_addralign = 1;
449 }
450 s1->dwhi = s1->nb_sections;
451 }
452 else
453 {
454 stab_section = new_section(s1, ".stab", SHT_PROGBITS, shf);
455 stab_section->sh_entsize = sizeof(Stab_Sym);
456 stab_section->sh_addralign = sizeof ((Stab_Sym*)0)->n_value;
457 stab_section->link = new_section(s1, ".stabstr", SHT_STRTAB, shf);
458 /* put first entry */
459 put_stabs(s1, "", 0, 0, 0, 0);
460 }
461 }
462
463 /* put stab debug information */
464 static void put_stabs(TCCState *s1, const char *str, int type, int other, int desc,
465 unsigned long value)
466 {
467 Stab_Sym *sym;
468
469 unsigned offset;
470 if (type == N_SLINE
471 && (offset = stab_section->data_offset)
472 && (sym = (Stab_Sym*)(stab_section->data + offset) - 1)
473 && sym->n_type == type
474 && sym->n_value == value) {
475 /* just update line_number in previous entry */
476 sym->n_desc = desc;
477 return;
478 }
479
480 sym = section_ptr_add(stab_section, sizeof(Stab_Sym));
481 if (str) {
482 sym->n_strx = put_elf_str(stab_section->link, str);
483 } else {
484 sym->n_strx = 0;
485 }
486 sym->n_type = type;
487 sym->n_other = other;
488 sym->n_desc = desc;
489 sym->n_value = value;
490 }
491
492 static void put_stabs_r(TCCState *s1, const char *str, int type, int other, int desc,
493 unsigned long value, Section *sec, int sym_index)
494 {
495 put_elf_reloc(symtab_section, stab_section,
496 stab_section->data_offset + 8,
497 sizeof ((Stab_Sym*)0)->n_value == PTR_SIZE ? R_DATA_PTR : R_DATA_32,
498 sym_index);
499 put_stabs(s1, str, type, other, desc, value);
500 }
501
502 static void put_stabn(TCCState *s1, int type, int other, int desc, int value)
503 {
504 put_stabs(s1, NULL, type, other, desc, value);
505 }
506
507 /* ------------------------------------------------------------------------- */
508 #define dwarf_data1(s,data) \
509 { unsigned char *p = section_ptr_add((s), 1); *p = (data); }
510 #define dwarf_data2(s,data) \
511 write16le(section_ptr_add((s), 2), (data))
512 #define dwarf_data4(s,data) \
513 write32le(section_ptr_add((s), 4), (data))
514 #define dwarf_data8(s,data) \
515 write64le(section_ptr_add((s), 8), (data))
516
517 static int dwarf_get_section_sym(Section *s)
518 {
519 TCCState *s1 = s->s1;
520 return put_elf_sym(symtab_section, 0, 0,
521 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
522 s->sh_num, NULL);
523 }
524
525 static void dwarf_reloc(Section *s, int sym, int rel)
526 {
527 TCCState *s1 = s->s1;
528 put_elf_reloca(symtab_section, s, s->data_offset, rel, sym, 0);
529 }
530
531 static void dwarf_string(Section *s, Section *dw, int sym, const char *str)
532 {
533 TCCState *s1 = s->s1;
534 int offset, len;
535 char *ptr;
536
537 len = strlen(str) + 1;
538 offset = dw->data_offset;
539 ptr = section_ptr_add(dw, len);
540 memmove(ptr, str, len);
541 put_elf_reloca(symtab_section, s, s->data_offset, R_DATA_32DW, sym,
542 PTR_SIZE == 4 ? 0 : offset);
543 dwarf_data4(s, PTR_SIZE == 4 ? offset : 0);
544 }
545
546 static void dwarf_strp(Section *s, const char *str)
547 {
548 TCCState *s1 = s->s1;
549 dwarf_string(s, dwarf_str_section, dwarf_sym.str, str);
550 }
551
552 static void dwarf_line_strp(Section *s, const char *str)
553 {
554 TCCState *s1 = s->s1;
555 dwarf_string(s, dwarf_line_str_section, dwarf_sym.line_str, str);
556 }
557
558 static void dwarf_line_op(TCCState *s1, unsigned char op)
559 {
560 if (dwarf_line.line_size >= dwarf_line.line_max_size) {
561 dwarf_line.line_max_size += 1024;
562 dwarf_line.line_data =
563 (unsigned char *)tcc_realloc(dwarf_line.line_data,
564 dwarf_line.line_max_size);
565 }
566 dwarf_line.line_data[dwarf_line.line_size++] = op;
567 }
568
569 static void dwarf_file(TCCState *s1)
570 {
571 int i, j;
572 char *filename;
573 int index_offset = s1->dwarf < 5;
574
575 if (!strcmp(file->filename, "<command line>")) {
576 dwarf_line.cur_file = 1;
577 return;
578 }
579 filename = strrchr(file->filename, '/');
580 if (filename == NULL) {
581 for (i = 1; i < dwarf_line.filename_size; i++)
582 if (dwarf_line.filename_table[i].dir_entry == 0 &&
583 strcmp(dwarf_line.filename_table[i].name,
584 file->filename) == 0) {
585 dwarf_line.cur_file = i + index_offset;
586 return;
587 }
588 i = -index_offset;
589 filename = file->filename;
590 }
591 else {
592 char *undo = filename;
593 char *dir = file->filename;
594
595 *filename++ = '\0';
596 for (i = 0; i < dwarf_line.dir_size; i++)
597 if (strcmp(dwarf_line.dir_table[i], dir) == 0) {
598 for (j = 1; j < dwarf_line.filename_size; j++)
599 if (dwarf_line.filename_table[j].dir_entry - index_offset
600 == i &&
601 strcmp(dwarf_line.filename_table[j].name,
602 filename) == 0) {
603 *undo = '/';
604 dwarf_line.cur_file = j + index_offset;
605 return;
606 }
607 break;
608 }
609 if (i == dwarf_line.dir_size) {
610 dwarf_line.dir_size++;
611 dwarf_line.dir_table =
612 (char **) tcc_realloc(dwarf_line.dir_table,
613 dwarf_line.dir_size *
614 sizeof (char *));
615 dwarf_line.dir_table[i] = tcc_strdup(dir);
616 }
617 *undo = '/';
618 }
619 dwarf_line.filename_table =
620 (struct dwarf_filename_struct *)
621 tcc_realloc(dwarf_line.filename_table,
622 (dwarf_line.filename_size + 1) *
623 sizeof (struct dwarf_filename_struct));
624 dwarf_line.filename_table[dwarf_line.filename_size].dir_entry =
625 i + index_offset;
626 dwarf_line.filename_table[dwarf_line.filename_size].name =
627 tcc_strdup(filename);
628 dwarf_line.cur_file = dwarf_line.filename_size++ + index_offset;
629 return;
630 }
631
632 #if 0
633 static int dwarf_uleb128_size (unsigned long long value)
634 {
635 int size = 0;
636
637 do {
638 value >>= 7;
639 size++;
640 } while (value != 0);
641 return size;
642 }
643 #endif
644
645 static int dwarf_sleb128_size (long long value)
646 {
647 int size = 0;
648 long long end = value >> 63;
649 unsigned char last = end & 0x40;
650 unsigned char byte;
651
652 do {
653 byte = value & 0x7f;
654 value >>= 7;
655 size++;
656 } while (value != end || (byte & 0x40) != last);
657 return size;
658 }
659
660 static void dwarf_uleb128 (Section *s, unsigned long long value)
661 {
662 do {
663 unsigned char byte = value & 0x7f;
664
665 value >>= 7;
666 dwarf_data1(s, byte | (value ? 0x80 : 0));
667 } while (value != 0);
668 }
669
670 static void dwarf_sleb128 (Section *s, long long value)
671 {
672 int more;
673 long long end = value >> 63;
674 unsigned char last = end & 0x40;
675
676 do {
677 unsigned char byte = value & 0x7f;
678
679 value >>= 7;
680 more = value != end || (byte & 0x40) != last;
681 dwarf_data1(s, byte | (0x80 * more));
682 } while (more);
683 }
684
685 static void dwarf_uleb128_op (TCCState *s1, unsigned long long value)
686 {
687 do {
688 unsigned char byte = value & 0x7f;
689
690 value >>= 7;
691 dwarf_line_op(s1, byte | (value ? 0x80 : 0));
692 } while (value != 0);
693 }
694
695 static void dwarf_sleb128_op (TCCState *s1, long long value)
696 {
697 int more;
698 long long end = value >> 63;
699 unsigned char last = end & 0x40;
700
701 do {
702 unsigned char byte = value & 0x7f;
703
704 value >>= 7;
705 more = value != end || (byte & 0x40) != last;
706 dwarf_line_op(s1, byte | (0x80 * more));
707 } while (more);
708 }
709
710 /* start of translation unit info */
711 ST_FUNC void tcc_debug_start(TCCState *s1)
712 {
713 int i;
714 char buf[512];
715 char *filename;
716
717 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
718 symbols can be safely used */
719 filename = file->prev ? file->prev->filename : file->filename;
720 put_elf_sym(symtab_section, 0, 0,
721 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
722 SHN_ABS, filename);
723
724 if (s1->do_debug) {
725
726 new_file = last_line_num = 0;
727 debug_next_type = N_DEFAULT_DEBUG;
728 debug_hash = NULL;
729 debug_anon_hash = NULL;
730 n_debug_hash = 0;
731 n_debug_anon_hash = 0;
732
733 getcwd(buf, sizeof(buf));
734 #ifdef _WIN32
735 normalize_slashes(buf);
736 #endif
737
738 if (s1->dwarf) {
739 int start_abbrev;
740 unsigned char *ptr;
741 char *undo;
742
743 /* dwarf_abbrev */
744 start_abbrev = dwarf_abbrev_section->data_offset;
745 ptr = section_ptr_add(dwarf_abbrev_section, sizeof(dwarf_abbrev_init));
746 memcpy(ptr, dwarf_abbrev_init, sizeof(dwarf_abbrev_init));
747
748 if (s1->dwarf < 5) {
749 while (*ptr) {
750 ptr += 3;
751 while (*ptr) {
752 if (ptr[1] == DW_FORM_line_strp)
753 ptr[1] = DW_FORM_strp;
754 if (s1->dwarf < 4) {
755 /* These are compatable for DW_TAG_compile_unit
756 DW_AT_stmt_list. */
757 if (ptr[1] == DW_FORM_sec_offset)
758 ptr[1] = DW_FORM_data4;
759 /* This code uses only size < 0x80 so these are
760 compatible. */
761 if (ptr[1] == DW_FORM_exprloc)
762 ptr[1] = DW_FORM_block1;
763 }
764 ptr += 2;
765 }
766 ptr += 2;
767 }
768 }
769
770 dwarf_sym.info = dwarf_get_section_sym(dwarf_info_section);
771 dwarf_sym.abbrev = dwarf_get_section_sym(dwarf_abbrev_section);
772 dwarf_sym.line = dwarf_get_section_sym(dwarf_line_section);
773 dwarf_sym.str = dwarf_get_section_sym(dwarf_str_section);
774 if (tcc_state->dwarf >= 5)
775 dwarf_sym.line_str = dwarf_get_section_sym(dwarf_line_str_section);
776 else {
777 dwarf_line_str_section = dwarf_str_section;
778 dwarf_sym.line_str = dwarf_sym.str;
779 }
780 section_sym = dwarf_get_section_sym(text_section);
781
782 /* dwarf_info */
783 dwarf_info.start = dwarf_info_section->data_offset;
784 dwarf_data4(dwarf_info_section, 0); // size
785 dwarf_data2(dwarf_info_section, s1->dwarf); // version
786 if (s1->dwarf >= 5) {
787 dwarf_data1(dwarf_info_section, DW_UT_compile); // unit type
788 dwarf_data1(dwarf_info_section, PTR_SIZE);
789 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
790 dwarf_data4(dwarf_info_section, start_abbrev);
791 }
792 else {
793 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
794 dwarf_data4(dwarf_info_section, start_abbrev);
795 dwarf_data1(dwarf_info_section, PTR_SIZE);
796 }
797
798 dwarf_data1(dwarf_info_section, DWARF_ABBREV_COMPILE_UNIT);
799 dwarf_strp(dwarf_info_section, "tcc " TCC_VERSION);
800 dwarf_data1(dwarf_info_section, DW_LANG_C11);
801 dwarf_line_strp(dwarf_info_section, filename);
802 dwarf_line_strp(dwarf_info_section, buf);
803 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
804 #if PTR_SIZE == 4
805 dwarf_data4(dwarf_info_section, ind); // low pc
806 dwarf_data4(dwarf_info_section, 0); // high pc
807 #else
808 dwarf_data8(dwarf_info_section, ind); // low pc
809 dwarf_data8(dwarf_info_section, 0); // high pc
810 #endif
811 dwarf_reloc(dwarf_info_section, dwarf_sym.line, R_DATA_32DW);
812 dwarf_data4(dwarf_info_section, dwarf_line_section->data_offset); // stmt_list
813
814 /* dwarf_line */
815 dwarf_line.start = dwarf_line_section->data_offset;
816 dwarf_data4(dwarf_line_section, 0); // length
817 dwarf_data2(dwarf_line_section, s1->dwarf); // version
818 if (s1->dwarf >= 5) {
819 dwarf_data1(dwarf_line_section, PTR_SIZE); // address size
820 dwarf_data1(dwarf_line_section, 0); // segment selector
821 }
822 dwarf_data4(dwarf_line_section, 0); // prologue Length
823 dwarf_data1(dwarf_line_section, DWARF_MIN_INSTR_LEN);
824 if (s1->dwarf >= 4)
825 dwarf_data1(dwarf_line_section, 1); // maximum ops per instruction
826 dwarf_data1(dwarf_line_section, 1); // Initial value of 'is_stmt'
827 dwarf_data1(dwarf_line_section, DWARF_LINE_BASE);
828 dwarf_data1(dwarf_line_section, DWARF_LINE_RANGE);
829 dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
830 ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
831 memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
832 undo = strrchr(filename, '/');
833 if (undo)
834 *undo = 0;
835 dwarf_line.dir_size = 1 + (undo != NULL);
836 dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
837 dwarf_line.dir_size);
838 dwarf_line.dir_table[0] = tcc_strdup(buf);
839 if (undo)
840 dwarf_line.dir_table[1] = tcc_strdup(filename);
841 dwarf_line.filename_size = 2;
842 dwarf_line.filename_table =
843 (struct dwarf_filename_struct *)
844 tcc_malloc(2*sizeof (struct dwarf_filename_struct));
845 dwarf_line.filename_table[0].dir_entry = 0;
846 if (undo) {
847 dwarf_line.filename_table[0].name = tcc_strdup(undo + 1);
848 dwarf_line.filename_table[1].dir_entry = 1;
849 dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
850 *undo = '/';
851 }
852 else {
853 dwarf_line.filename_table[0].name = tcc_strdup(filename);
854 dwarf_line.filename_table[1].dir_entry = 0;
855 dwarf_line.filename_table[1].name = tcc_strdup(filename);
856 }
857 dwarf_line.line_size = dwarf_line.line_max_size = 0;
858 dwarf_line.line_data = NULL;
859 dwarf_line.cur_file = 1;
860 dwarf_line.last_file = 0;
861 dwarf_line.last_pc = 0;
862 dwarf_line.last_line = 1;
863 dwarf_line_op(s1, 0); // extended
864 dwarf_uleb128_op(s1, 1 + PTR_SIZE); // extended size
865 dwarf_line_op(s1, DW_LNE_set_address);
866 for (i = 0; i < PTR_SIZE; i++)
867 dwarf_line_op(s1, 0);
868 memset(&dwarf_info.base_type_used, 0, sizeof(dwarf_info.base_type_used));
869 }
870 else
871 {
872 /* file info: full path + filename */
873 pstrcat(buf, sizeof(buf), "/");
874 section_sym = put_elf_sym(symtab_section, 0, 0,
875 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
876 text_section->sh_num, NULL);
877 put_stabs_r(s1, buf, N_SO, 0, 0,
878 text_section->data_offset, text_section, section_sym);
879 put_stabs_r(s1, filename, N_SO, 0, 0,
880 text_section->data_offset, text_section, section_sym);
881 for (i = 0; i < N_DEFAULT_DEBUG; i++)
882 put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
883 }
884 /* we're currently 'including' the <command line> */
885 tcc_debug_bincl(s1);
886 }
887 }
888
889 /* put end of translation unit info */
890 ST_FUNC void tcc_debug_end(TCCState *s1)
891 {
892 if (!s1->do_debug)
893 return;
894 if (s1->dwarf) {
895 int i, j;
896 int start_aranges;
897 unsigned char *ptr;
898 int text_size = text_section->data_offset;
899
900 /* dwarf_info */
901 for (i = 0; i < n_debug_anon_hash; i++) {
902 Sym *t = debug_anon_hash[i].type;
903 int pos = dwarf_info_section->data_offset;
904
905 dwarf_data1(dwarf_info_section,
906 IS_UNION (t->type.t) ? DWARF_ABBREV_UNION_EMPTY_TYPE
907 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
908 dwarf_strp(dwarf_info_section,
909 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
910 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
911 dwarf_uleb128(dwarf_info_section, 0);
912 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
913 dwarf_uleb128(dwarf_info_section, file->line_num);
914 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
915 write32le(dwarf_info_section->data +
916 debug_anon_hash[i].debug_type[j],
917 pos - dwarf_info.start);
918 tcc_free (debug_anon_hash[i].debug_type);
919 }
920 tcc_free (debug_anon_hash);
921 dwarf_data1(dwarf_info_section, 0);
922 ptr = dwarf_info_section->data + dwarf_info.start;
923 write32le(ptr, dwarf_info_section->data_offset - dwarf_info.start - 4);
924 write32le(ptr + 25 + (s1->dwarf >= 5) + PTR_SIZE, text_size);
925
926 /* dwarf_aranges */
927 start_aranges = dwarf_aranges_section->data_offset;
928 dwarf_data4(dwarf_aranges_section, 0); // size
929 dwarf_data2(dwarf_aranges_section, 2); // version
930 dwarf_reloc(dwarf_aranges_section, dwarf_sym.info, R_DATA_32DW);
931 dwarf_data4(dwarf_aranges_section, 0); // dwarf_info
932 #if PTR_SIZE == 4
933 dwarf_data1(dwarf_aranges_section, 4); // address size
934 #else
935 dwarf_data1(dwarf_aranges_section, 8); // address size
936 #endif
937 dwarf_data1(dwarf_aranges_section, 0); // segment selector size
938 dwarf_data4(dwarf_aranges_section, 0); // padding
939 dwarf_reloc(dwarf_aranges_section, section_sym, R_DATA_PTR);
940 #if PTR_SIZE == 4
941 dwarf_data4(dwarf_aranges_section, 0); // Begin
942 dwarf_data4(dwarf_aranges_section, text_size); // End
943 dwarf_data4(dwarf_aranges_section, 0); // End list
944 dwarf_data4(dwarf_aranges_section, 0); // End list
945 #else
946 dwarf_data8(dwarf_aranges_section, 0); // Begin
947 dwarf_data8(dwarf_aranges_section, text_size); // End
948 dwarf_data8(dwarf_aranges_section, 0); // End list
949 dwarf_data8(dwarf_aranges_section, 0); // End list
950 #endif
951 ptr = dwarf_aranges_section->data + start_aranges;
952 write32le(ptr, dwarf_aranges_section->data_offset - start_aranges - 4);
953
954 /* dwarf_line */
955 if (s1->dwarf >= 5) {
956 dwarf_data1(dwarf_line_section, 1); /* col */
957 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
958 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
959 dwarf_uleb128(dwarf_line_section, dwarf_line.dir_size);
960 for (i = 0; i < dwarf_line.dir_size; i++)
961 dwarf_line_strp(dwarf_line_section, dwarf_line.dir_table[i]);
962 dwarf_data1(dwarf_line_section, 2); /* col */
963 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
964 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
965 dwarf_uleb128(dwarf_line_section, DW_LNCT_directory_index);
966 dwarf_uleb128(dwarf_line_section, DW_FORM_udata);
967 dwarf_uleb128(dwarf_line_section, dwarf_line.filename_size);
968 for (i = 0; i < dwarf_line.filename_size; i++) {
969 dwarf_line_strp(dwarf_line_section,
970 dwarf_line.filename_table[i].name);
971 dwarf_uleb128(dwarf_line_section,
972 dwarf_line.filename_table[i].dir_entry);
973 }
974 }
975 else {
976 int len;
977
978 for (i = 0; i < dwarf_line.dir_size; i++) {
979 len = strlen(dwarf_line.dir_table[i]) + 1;
980 ptr = section_ptr_add(dwarf_line_section, len);
981 memmove(ptr, dwarf_line.dir_table[i], len);
982 }
983 dwarf_data1(dwarf_line_section, 0); /* end dir */
984 for (i = 0; i < dwarf_line.filename_size; i++) {
985 len = strlen(dwarf_line.filename_table[i].name) + 1;
986 ptr = section_ptr_add(dwarf_line_section, len);
987 memmove(ptr, dwarf_line.filename_table[i].name, len);
988 dwarf_uleb128(dwarf_line_section,
989 dwarf_line.filename_table[i].dir_entry);
990 dwarf_uleb128(dwarf_line_section, 0); /* time */
991 dwarf_uleb128(dwarf_line_section, 0); /* size */
992 }
993 dwarf_data1(dwarf_line_section, 0); /* end file */
994 }
995 for (i = 0; i < dwarf_line.dir_size; i++)
996 tcc_free(dwarf_line.dir_table[i]);
997 tcc_free(dwarf_line.dir_table);
998 for (i = 0; i < dwarf_line.filename_size; i++)
999 tcc_free(dwarf_line.filename_table[i].name);
1000 tcc_free(dwarf_line.filename_table);
1001
1002 dwarf_line_op(s1, 0); // extended
1003 dwarf_uleb128_op(s1, 1); // extended size
1004 dwarf_line_op(s1, DW_LNE_end_sequence);
1005 i = (s1->dwarf >= 5) * 2;
1006 write32le(&dwarf_line_section->data[dwarf_line.start + 6 + i],
1007 dwarf_line_section->data_offset - dwarf_line.start - (10 + i));
1008 section_ptr_add(dwarf_line_section, 3);
1009 dwarf_reloc(dwarf_line_section, section_sym, R_DATA_PTR);
1010 ptr = section_ptr_add(dwarf_line_section, dwarf_line.line_size - 3);
1011 memmove(ptr - 3, dwarf_line.line_data, dwarf_line.line_size);
1012 tcc_free(dwarf_line.line_data);
1013 write32le(dwarf_line_section->data + dwarf_line.start,
1014 dwarf_line_section->data_offset - dwarf_line.start - 4);
1015 }
1016 else
1017 {
1018 put_stabs_r(s1, NULL, N_SO, 0, 0,
1019 text_section->data_offset, text_section, section_sym);
1020 }
1021 tcc_free(debug_hash);
1022 }
1023
1024 static BufferedFile* put_new_file(TCCState *s1)
1025 {
1026 BufferedFile *f = file;
1027 /* use upper file if from inline ":asm:" */
1028 if (f->filename[0] == ':')
1029 f = f->prev;
1030 if (f && new_file) {
1031 new_file = last_line_num = 0;
1032 if (s1->dwarf)
1033 dwarf_file(s1);
1034 else
1035 put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
1036 }
1037 return f;
1038 }
1039
1040 /* put alternative filename */
1041 ST_FUNC void tcc_debug_putfile(TCCState *s1, const char *filename)
1042 {
1043 if (0 == strcmp(file->filename, filename))
1044 return;
1045 pstrcpy(file->filename, sizeof(file->filename), filename);
1046 if (!s1->do_debug)
1047 return;
1048 if (s1->dwarf)
1049 dwarf_file(s1);
1050 new_file = 1;
1051 }
1052
1053 /* begin of #include */
1054 ST_FUNC void tcc_debug_bincl(TCCState *s1)
1055 {
1056 if (!s1->do_debug)
1057 return;
1058 if (s1->dwarf)
1059 dwarf_file(s1);
1060 else
1061 put_stabs(s1, file->filename, N_BINCL, 0, 0, 0);
1062 new_file = 1;
1063 }
1064
1065 /* end of #include */
1066 ST_FUNC void tcc_debug_eincl(TCCState *s1)
1067 {
1068 if (!s1->do_debug)
1069 return;
1070 if (s1->dwarf)
1071 dwarf_file(s1);
1072 else
1073 put_stabn(s1, N_EINCL, 0, 0, 0);
1074 new_file = 1;
1075 }
1076
1077 /* generate line number info */
1078 ST_FUNC void tcc_debug_line(TCCState *s1)
1079 {
1080 BufferedFile *f;
1081
1082 if (!s1->do_debug)
1083 return;
1084 if (cur_text_section != text_section)
1085 return;
1086 f = put_new_file(s1);
1087 if (!f)
1088 return;
1089 if (last_line_num == f->line_num)
1090 return;
1091 last_line_num = f->line_num;
1092
1093 if (s1->dwarf) {
1094 int len_pc = (ind - dwarf_line.last_pc) / DWARF_MIN_INSTR_LEN;
1095 int len_line = f->line_num - dwarf_line.last_line;
1096 int n = len_pc * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1097
1098 if (dwarf_line.cur_file != dwarf_line.last_file) {
1099 dwarf_line.last_file = dwarf_line.cur_file;
1100 dwarf_line_op(s1, DW_LNS_set_file);
1101 dwarf_uleb128_op(s1, dwarf_line.cur_file);
1102 }
1103 if (len_pc &&
1104 len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1105 n >= DWARF_OPCODE_BASE && n <= 255)
1106 dwarf_line_op(s1, n);
1107 else {
1108 if (len_pc) {
1109 n = len_pc * DWARF_LINE_RANGE + 0 + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1110 if (n >= DWARF_OPCODE_BASE && n <= 255)
1111 dwarf_line_op(s1, n);
1112 else {
1113 dwarf_line_op(s1, DW_LNS_advance_pc);
1114 dwarf_uleb128_op(s1, len_pc);
1115 }
1116 }
1117 if (len_line) {
1118 n = 0 * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1119 if (len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1120 n >= DWARF_OPCODE_BASE && n <= 255)
1121 dwarf_line_op(s1, n);
1122 else {
1123 dwarf_line_op(s1, DW_LNS_advance_line);
1124 dwarf_sleb128_op(s1, len_line);
1125 }
1126 }
1127 }
1128 dwarf_line.last_pc = ind;
1129 dwarf_line.last_line = f->line_num;
1130 }
1131 else
1132 {
1133 if (func_ind != -1) {
1134 put_stabn(s1, N_SLINE, 0, f->line_num, ind - func_ind);
1135 } else {
1136 /* from tcc_assemble */
1137 put_stabs_r(s1, NULL, N_SLINE, 0, f->line_num, ind, text_section, section_sym);
1138 }
1139 }
1140 }
1141
1142 static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
1143 Section *sec, int sym_index, int info)
1144 {
1145 struct debug_sym *s;
1146
1147 if (debug_info) {
1148 debug_info->sym =
1149 (struct debug_sym *)tcc_realloc (debug_info->sym,
1150 sizeof(struct debug_sym) *
1151 (debug_info->n_sym + 1));
1152 s = debug_info->sym + debug_info->n_sym++;
1153 s->type = type;
1154 s->value = value;
1155 s->str = tcc_strdup(str);
1156 s->sec = sec;
1157 s->sym_index = sym_index;
1158 s->info = info;
1159 s->file = dwarf_line.cur_file;
1160 s->line = file->line_num;
1161 }
1162 else if (sec)
1163 put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
1164 else
1165 put_stabs (s1, str, type, 0, 0, value);
1166 }
1167
1168 ST_FUNC void tcc_debug_stabn(TCCState *s1, int type, int value)
1169 {
1170 if (!s1->do_debug)
1171 return;
1172 if (type == N_LBRAC) {
1173 struct _debug_info *info =
1174 (struct _debug_info *) tcc_mallocz(sizeof (*info));
1175
1176 info->start = value;
1177 info->parent = debug_info;
1178 if (debug_info) {
1179 if (debug_info->child) {
1180 if (debug_info->child->last)
1181 debug_info->child->last->next = info;
1182 else
1183 debug_info->child->next = info;
1184 debug_info->child->last = info;
1185 }
1186 else
1187 debug_info->child = info;
1188 }
1189 else
1190 debug_info_root = info;
1191 debug_info = info;
1192 }
1193 else {
1194 debug_info->end = value;
1195 debug_info = debug_info->parent;
1196 }
1197 }
1198
1199 static int tcc_debug_find(TCCState *s1, Sym *t, int dwarf)
1200 {
1201 int i;
1202
1203 if (!debug_info && dwarf &&
1204 (t->type.t & VT_BTYPE) == VT_STRUCT && t->c == -1) {
1205 for (i = 0; i < n_debug_anon_hash; i++)
1206 if (t == debug_anon_hash[i].type)
1207 return 0;
1208 debug_anon_hash = (struct _debug_anon_hash *)
1209 tcc_realloc (debug_anon_hash,
1210 (n_debug_anon_hash + 1) * sizeof(*debug_anon_hash));
1211 debug_anon_hash[n_debug_anon_hash].n_debug_type = 0;
1212 debug_anon_hash[n_debug_anon_hash].debug_type = NULL;
1213 debug_anon_hash[n_debug_anon_hash++].type = t;
1214 return 0;
1215 }
1216 for (i = 0; i < n_debug_hash; i++)
1217 if (t == debug_hash[i].type)
1218 return debug_hash[i].debug_type;
1219 return -1;
1220 }
1221
1222 static int tcc_get_dwarf_info(TCCState *s1, Sym *s);
1223
1224 static void tcc_debug_check_anon(TCCState *s1, Sym *t, int debug_type)
1225 {
1226 int i;
1227
1228 if (!debug_info && (t->type.t & VT_BTYPE) == VT_STRUCT && t->type.ref->c == -1)
1229 for (i = 0; i < n_debug_anon_hash; i++)
1230 if (t->type.ref == debug_anon_hash[i].type) {
1231 debug_anon_hash[i].debug_type =
1232 tcc_realloc(debug_anon_hash[i].debug_type,
1233 (debug_anon_hash[i].n_debug_type + 1) * sizeof(int));
1234 debug_anon_hash[i].debug_type[debug_anon_hash[i].n_debug_type++] =
1235 debug_type;
1236 }
1237 }
1238
1239 ST_FUNC void tcc_debug_fix_anon(TCCState *s1, CType *t)
1240 {
1241 int i, j, debug_type;
1242
1243 if (!s1->do_debug || !s1->dwarf || debug_info)
1244 return;
1245 if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
1246 for (i = 0; i < n_debug_anon_hash; i++)
1247 if (t->ref == debug_anon_hash[i].type) {
1248 Sym sym = {0}; sym .type = *t ;
1249
1250 /* Trick to not hash this struct */
1251 debug_info = (struct _debug_info *) t;
1252 debug_type = tcc_get_dwarf_info(s1, &sym);
1253 debug_info = NULL;
1254 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
1255 write32le(dwarf_info_section->data +
1256 debug_anon_hash[i].debug_type[j],
1257 debug_type - dwarf_info.start);
1258 tcc_free(debug_anon_hash[i].debug_type);
1259 n_debug_anon_hash--;
1260 for (; i < n_debug_anon_hash; i++)
1261 debug_anon_hash[i] = debug_anon_hash[i + 1];
1262 }
1263 }
1264
1265 static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
1266 {
1267 int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
1268 debug_hash = (struct _debug_hash *)
1269 tcc_realloc (debug_hash,
1270 (n_debug_hash + 1) * sizeof(*debug_hash));
1271 debug_hash[n_debug_hash].debug_type = offset;
1272 debug_hash[n_debug_hash++].type = t;
1273 return offset;
1274 }
1275
1276 static void tcc_debug_remove(TCCState *s1, Sym *t)
1277 {
1278 int i;
1279
1280 for (i = 0; i < n_debug_hash; i++)
1281 if (t == debug_hash[i].type) {
1282 n_debug_hash--;
1283 for (; i < n_debug_hash; i++)
1284 debug_hash[i] = debug_hash[i+1];
1285 }
1286 }
1287
1288 #define STRUCT_NODEBUG(s) \
1289 (s->a.nodebug || \
1290 ((s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM && \
1291 ((s->type.t & VT_BTYPE) == VT_BYTE || \
1292 (s->type.t & VT_BTYPE) == VT_BOOL || \
1293 (s->type.t & VT_BTYPE) == VT_SHORT || \
1294 (s->type.t & VT_BTYPE) == VT_INT || \
1295 (s->type.t & VT_BTYPE) == VT_LLONG)))
1296
1297 static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
1298 {
1299 int type;
1300 int n = 0;
1301 int debug_type = -1;
1302 Sym *t = s;
1303 CString str;
1304
1305 for (;;) {
1306 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1307 if ((type & VT_BTYPE) != VT_BYTE)
1308 type &= ~VT_DEFSIGN;
1309 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1310 n++, t = t->type.ref;
1311 else
1312 break;
1313 }
1314 if ((type & VT_BTYPE) == VT_STRUCT) {
1315 Sym *e = t;
1316
1317 t = t->type.ref;
1318 debug_type = tcc_debug_find(s1, t, 0);
1319 if (debug_type == -1) {
1320 debug_type = tcc_debug_add(s1, t, 0);
1321 cstr_new (&str);
1322 cstr_printf (&str, "%s:T%d=%c%d",
1323 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1324 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1325 debug_type,
1326 IS_UNION (t->type.t) ? 'u' : 's',
1327 t->c);
1328 while (t->next) {
1329 int pos, size, align;
1330
1331 t = t->next;
1332 if (STRUCT_NODEBUG(t))
1333 continue;
1334 cstr_printf (&str, "%s:",
1335 get_tok_str(t->v & ~SYM_FIELD, NULL));
1336 tcc_get_debug_info (s1, t, &str);
1337 if (t->type.t & VT_BITFIELD) {
1338 pos = t->c * 8 + BIT_POS(t->type.t);
1339 size = BIT_SIZE(t->type.t);
1340 }
1341 else {
1342 pos = t->c * 8;
1343 size = type_size(&t->type, &align) * 8;
1344 }
1345 cstr_printf (&str, ",%d,%d;", pos, size);
1346 }
1347 cstr_printf (&str, ";");
1348 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1349 cstr_free (&str);
1350 if (debug_info)
1351 tcc_debug_remove(s1, e);
1352 }
1353 }
1354 else if (IS_ENUM(type)) {
1355 Sym *e = t = t->type.ref;
1356
1357 debug_type = tcc_debug_find(s1, t, 0);
1358 if (debug_type == -1) {
1359 debug_type = tcc_debug_add(s1, t, 0);
1360 cstr_new (&str);
1361 cstr_printf (&str, "%s:T%d=e",
1362 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1363 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1364 debug_type);
1365 while (t->next) {
1366 t = t->next;
1367 cstr_printf (&str, "%s:",
1368 (t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1369 ? "" : get_tok_str(t->v & ~SYM_FIELD, NULL));
1370 cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
1371 (int)t->enum_val);
1372 }
1373 cstr_printf (&str, ";");
1374 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1375 cstr_free (&str);
1376 if (debug_info)
1377 tcc_debug_remove(s1, e);
1378 }
1379 }
1380 else if ((type & VT_BTYPE) != VT_FUNC) {
1381 type &= ~VT_STRUCT_MASK;
1382 for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
1383 if (default_debug[debug_type - 1].type == type)
1384 break;
1385 if (debug_type > N_DEFAULT_DEBUG)
1386 return;
1387 }
1388 if (n > 0)
1389 cstr_printf (result, "%d=", ++debug_next_type);
1390 t = s;
1391 for (;;) {
1392 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1393 if ((type & VT_BTYPE) != VT_BYTE)
1394 type &= ~VT_DEFSIGN;
1395 if (type == VT_PTR)
1396 cstr_printf (result, "%d=*", ++debug_next_type);
1397 else if (type == (VT_PTR | VT_ARRAY))
1398 cstr_printf (result, "%d=ar1;0;%d;",
1399 ++debug_next_type, t->type.ref->c - 1);
1400 else if (type == VT_FUNC) {
1401 cstr_printf (result, "%d=f", ++debug_next_type);
1402 tcc_get_debug_info (s1, t->type.ref, result);
1403 return;
1404 }
1405 else
1406 break;
1407 t = t->type.ref;
1408 }
1409 cstr_printf (result, "%d", debug_type);
1410 }
1411
1412 static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
1413 {
1414 int type;
1415 int debug_type = -1;
1416 Sym *e, *t = s;
1417 int i;
1418 int last_pos = -1;
1419 int retval;
1420
1421 if (new_file)
1422 put_new_file(s1);
1423 for (;;) {
1424 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1425 if ((type & VT_BTYPE) != VT_BYTE)
1426 type &= ~VT_DEFSIGN;
1427 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1428 t = t->type.ref;
1429 else
1430 break;
1431 }
1432 if ((type & VT_BTYPE) == VT_STRUCT) {
1433 t = t->type.ref;
1434 debug_type = tcc_debug_find(s1, t, 1);
1435 if (debug_type == -1) {
1436 int pos_sib = 0, i, *pos_type;
1437
1438 debug_type = tcc_debug_add(s1, t, 1);
1439 e = t;
1440 i = 0;
1441 while (e->next) {
1442 e = e->next;
1443 if (STRUCT_NODEBUG(e))
1444 continue;
1445 i++;
1446 }
1447 pos_type = (int *) tcc_malloc(i * sizeof(int));
1448 dwarf_data1(dwarf_info_section,
1449 IS_UNION (t->type.t)
1450 ? t->next ? DWARF_ABBREV_UNION_TYPE
1451 : DWARF_ABBREV_UNION_EMPTY_TYPE
1452 : t->next ? DWARF_ABBREV_STRUCTURE_TYPE
1453 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
1454 dwarf_strp(dwarf_info_section,
1455 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1456 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1457 dwarf_uleb128(dwarf_info_section, t->c);
1458 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1459 dwarf_uleb128(dwarf_info_section, file->line_num);
1460 if (t->next) {
1461 pos_sib = dwarf_info_section->data_offset;
1462 dwarf_data4(dwarf_info_section, 0);
1463 }
1464 e = t;
1465 i = 0;
1466 while (e->next) {
1467 e = e->next;
1468 if (STRUCT_NODEBUG(e))
1469 continue;
1470 dwarf_data1(dwarf_info_section,
1471 e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
1472 : DWARF_ABBREV_MEMBER);
1473 dwarf_strp(dwarf_info_section,
1474 get_tok_str(e->v & ~SYM_FIELD, NULL));
1475 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1476 dwarf_uleb128(dwarf_info_section, file->line_num);
1477 pos_type[i++] = dwarf_info_section->data_offset;
1478 dwarf_data4(dwarf_info_section, 0);
1479 if (e->type.t & VT_BITFIELD) {
1480 int pos = e->c * 8 + BIT_POS(e->type.t);
1481 int size = BIT_SIZE(e->type.t);
1482
1483 dwarf_uleb128(dwarf_info_section, size);
1484 dwarf_uleb128(dwarf_info_section, pos);
1485 }
1486 else
1487 dwarf_uleb128(dwarf_info_section, e->c);
1488 }
1489 if (t->next) {
1490 dwarf_data1(dwarf_info_section, 0);
1491 write32le(dwarf_info_section->data + pos_sib,
1492 dwarf_info_section->data_offset - dwarf_info.start);
1493 }
1494 e = t;
1495 i = 0;
1496 while (e->next) {
1497 e = e->next;
1498 if (STRUCT_NODEBUG(e))
1499 continue;
1500 type = tcc_get_dwarf_info(s1, e);
1501 tcc_debug_check_anon(s1, e, pos_type[i]);
1502 write32le(dwarf_info_section->data + pos_type[i++],
1503 type - dwarf_info.start);
1504 }
1505 tcc_free(pos_type);
1506 if (debug_info)
1507 tcc_debug_remove(s1, t);
1508 }
1509 }
1510 else if (IS_ENUM(type)) {
1511 t = t->type.ref;
1512 debug_type = tcc_debug_find(s1, t, 1);
1513 if (debug_type == -1) {
1514 int pos_sib, pos_type;
1515 Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
1516
1517 pos_type = tcc_get_dwarf_info(s1, &sym);
1518 debug_type = tcc_debug_add(s1, t, 1);
1519 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
1520 dwarf_strp(dwarf_info_section,
1521 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1522 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1523 dwarf_data1(dwarf_info_section,
1524 type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
1525 dwarf_data1(dwarf_info_section, 4);
1526 dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
1527 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1528 dwarf_uleb128(dwarf_info_section, file->line_num);
1529 pos_sib = dwarf_info_section->data_offset;
1530 dwarf_data4(dwarf_info_section, 0);
1531 e = t;
1532 while (e->next) {
1533 e = e->next;
1534 dwarf_data1(dwarf_info_section,
1535 type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
1536 : DWARF_ABBREV_ENUMERATOR_SIGNED);
1537 dwarf_strp(dwarf_info_section,
1538 (e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1539 ? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
1540 if (type & VT_UNSIGNED)
1541 dwarf_uleb128(dwarf_info_section, e->enum_val);
1542 else
1543 dwarf_sleb128(dwarf_info_section, e->enum_val);
1544 }
1545 dwarf_data1(dwarf_info_section, 0);
1546 write32le(dwarf_info_section->data + pos_sib,
1547 dwarf_info_section->data_offset - dwarf_info.start);
1548 if (debug_info)
1549 tcc_debug_remove(s1, t);
1550 }
1551 }
1552 else if ((type & VT_BTYPE) != VT_FUNC) {
1553 type &= ~VT_STRUCT_MASK;
1554 for (i = 1; i <= N_DEFAULT_DEBUG; i++)
1555 if (default_debug[i - 1].type == type)
1556 break;
1557 if (i > N_DEFAULT_DEBUG)
1558 return 0;
1559 debug_type = dwarf_info.base_type_used[i - 1];
1560 if (debug_type == 0) {
1561 char name[100];
1562
1563 debug_type = dwarf_info_section->data_offset;
1564 dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
1565 dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
1566 dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
1567 strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
1568 *strchr(name, ':') = 0;
1569 dwarf_strp(dwarf_info_section, name);
1570 dwarf_info.base_type_used[i - 1] = debug_type;
1571 }
1572 }
1573 retval = debug_type;
1574 e = NULL;
1575 t = s;
1576 for (;;) {
1577 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1578 if ((type & VT_BTYPE) != VT_BYTE)
1579 type &= ~VT_DEFSIGN;
1580 if (type == VT_PTR) {
1581 i = dwarf_info_section->data_offset;
1582 if (retval == debug_type)
1583 retval = i;
1584 dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
1585 dwarf_data1(dwarf_info_section, PTR_SIZE);
1586 if (last_pos != -1) {
1587 tcc_debug_check_anon(s1, e, last_pos);
1588 write32le(dwarf_info_section->data + last_pos,
1589 i - dwarf_info.start);
1590 }
1591 last_pos = dwarf_info_section->data_offset;
1592 e = t->type.ref;
1593 dwarf_data4(dwarf_info_section, 0);
1594 }
1595 else if (type == (VT_PTR | VT_ARRAY)) {
1596 int sib_pos, sub_type;
1597 #if LONG_SIZE == 4
1598 Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
1599 #else
1600 Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
1601 #endif
1602
1603 sub_type = tcc_get_dwarf_info(s1, &sym);
1604 i = dwarf_info_section->data_offset;
1605 if (retval == debug_type)
1606 retval = i;
1607 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
1608 if (last_pos != -1) {
1609 tcc_debug_check_anon(s1, e, last_pos);
1610 write32le(dwarf_info_section->data + last_pos,
1611 i - dwarf_info.start);
1612 }
1613 last_pos = dwarf_info_section->data_offset;
1614 e = t->type.ref;
1615 dwarf_data4(dwarf_info_section, 0);
1616 sib_pos = dwarf_info_section->data_offset;
1617 dwarf_data4(dwarf_info_section, 0);
1618 for (;;) {
1619 dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
1620 dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
1621 dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
1622 s = t->type.ref;
1623 type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
1624 if (type != (VT_PTR | VT_ARRAY))
1625 break;
1626 t = s;
1627 }
1628 dwarf_data1(dwarf_info_section, 0);
1629 write32le(dwarf_info_section->data + sib_pos,
1630 dwarf_info_section->data_offset - dwarf_info.start);
1631 }
1632 else if (type == VT_FUNC) {
1633 int sib_pos = 0, *pos_type;
1634 Sym *f;
1635
1636 i = dwarf_info_section->data_offset;
1637 debug_type = tcc_get_dwarf_info(s1, t->type.ref);
1638 if (retval == debug_type)
1639 retval = i;
1640 dwarf_data1(dwarf_info_section,
1641 t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
1642 : DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
1643 if (last_pos != -1) {
1644 tcc_debug_check_anon(s1, e, last_pos);
1645 write32le(dwarf_info_section->data + last_pos,
1646 i - dwarf_info.start);
1647 }
1648 last_pos = dwarf_info_section->data_offset;
1649 e = t->type.ref;
1650 dwarf_data4(dwarf_info_section, 0);
1651 if (t->type.ref->next) {
1652 sib_pos = dwarf_info_section->data_offset;
1653 dwarf_data4(dwarf_info_section, 0);
1654 }
1655 f = t->type.ref;
1656 i = 0;
1657 while (f->next) {
1658 f = f->next;
1659 i++;
1660 }
1661 pos_type = (int *) tcc_malloc(i * sizeof(int));
1662 f = t->type.ref;
1663 i = 0;
1664 while (f->next) {
1665 f = f->next;
1666 dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
1667 pos_type[i++] = dwarf_info_section->data_offset;
1668 dwarf_data4(dwarf_info_section, 0);
1669 }
1670 if (t->type.ref->next) {
1671 dwarf_data1(dwarf_info_section, 0);
1672 write32le(dwarf_info_section->data + sib_pos,
1673 dwarf_info_section->data_offset - dwarf_info.start);
1674 }
1675 f = t->type.ref;
1676 i = 0;
1677 while (f->next) {
1678 f = f->next;
1679 type = tcc_get_dwarf_info(s1, f);
1680 tcc_debug_check_anon(s1, f, pos_type[i]);
1681 write32le(dwarf_info_section->data + pos_type[i++],
1682 type - dwarf_info.start);
1683 }
1684 tcc_free(pos_type);
1685 }
1686 else {
1687 if (last_pos != -1) {
1688 tcc_debug_check_anon(s1, e, last_pos);
1689 write32le(dwarf_info_section->data + last_pos,
1690 debug_type - dwarf_info.start);
1691 }
1692 break;
1693 }
1694 t = t->type.ref;
1695 }
1696 return retval;
1697 }
1698
1699 static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
1700 {
1701 while (cur) {
1702 struct _debug_info *next = cur->next;
1703 int i;
1704
1705 if (s1->dwarf) {
1706
1707 for (i = cur->n_sym - 1; i >= 0; i--) {
1708 struct debug_sym *s = &cur->sym[i];
1709
1710 dwarf_data1(dwarf_info_section,
1711 s->type == N_PSYM
1712 ? DWARF_ABBREV_FORMAL_PARAMETER
1713 : s->type == N_GSYM
1714 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1715 : s->type == N_STSYM
1716 ? DWARF_ABBREV_VARIABLE_STATIC
1717 : DWARF_ABBREV_VARIABLE_LOCAL);
1718 dwarf_strp(dwarf_info_section, s->str);
1719 if (s->type == N_GSYM || s->type == N_STSYM) {
1720 dwarf_uleb128(dwarf_info_section, s->file);
1721 dwarf_uleb128(dwarf_info_section, s->line);
1722 }
1723 dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
1724 if (s->type == N_GSYM || s->type == N_STSYM) {
1725 /* global/static */
1726 if (s->type == N_GSYM)
1727 dwarf_data1(dwarf_info_section, 1);
1728 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1729 dwarf_data1(dwarf_info_section, DW_OP_addr);
1730 if (s->type == N_STSYM)
1731 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1732 #if PTR_SIZE == 4
1733 dwarf_data4(dwarf_info_section, s->value);
1734 #else
1735 dwarf_data8(dwarf_info_section, s->value);
1736 #endif
1737 }
1738 else {
1739 /* param/local */
1740 dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
1741 dwarf_data1(dwarf_info_section, DW_OP_fbreg);
1742 dwarf_sleb128(dwarf_info_section, s->value);
1743 }
1744 tcc_free (s->str);
1745 }
1746 tcc_free (cur->sym);
1747 dwarf_data1(dwarf_info_section,
1748 cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
1749 : DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
1750 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1751 #if PTR_SIZE == 4
1752 dwarf_data4(dwarf_info_section, func_ind + cur->start);
1753 dwarf_data4(dwarf_info_section, cur->end - cur->start);
1754 #else
1755 dwarf_data8(dwarf_info_section, func_ind + cur->start);
1756 dwarf_data8(dwarf_info_section, cur->end - cur->start);
1757 #endif
1758 tcc_debug_finish (s1, cur->child);
1759 if (cur->child)
1760 dwarf_data1(dwarf_info_section, 0);
1761 }
1762 else
1763 {
1764 for (i = 0; i < cur->n_sym; i++) {
1765 struct debug_sym *s = &cur->sym[i];
1766
1767 if (s->sec)
1768 put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
1769 s->sec, s->sym_index);
1770 else
1771 put_stabs(s1, s->str, s->type, 0, 0, s->value);
1772 tcc_free (s->str);
1773 }
1774 tcc_free (cur->sym);
1775 put_stabn(s1, N_LBRAC, 0, 0, cur->start);
1776 tcc_debug_finish (s1, cur->child);
1777 put_stabn(s1, N_RBRAC, 0, 0, cur->end);
1778 }
1779 tcc_free (cur);
1780 cur = next;
1781 }
1782 }
1783
1784 ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
1785 {
1786 CString debug_str;
1787 if (!s1->do_debug)
1788 return;
1789 cstr_new (&debug_str);
1790 for (; s != e; s = s->prev) {
1791 if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
1792 continue;
1793 if (s1->dwarf) {
1794 tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
1795 param ? N_PSYM : N_LSYM, s->c, NULL, 0,
1796 tcc_get_dwarf_info(s1, s));
1797 }
1798 else
1799 {
1800 cstr_reset (&debug_str);
1801 cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
1802 param ? "p" : "");
1803 tcc_get_debug_info(s1, s, &debug_str);
1804 tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
1805 s->c, NULL, 0, 0);
1806 }
1807 }
1808 cstr_free (&debug_str);
1809 }
1810
1811 /* put function symbol */
1812 ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
1813 {
1814 CString debug_str;
1815 BufferedFile *f;
1816
1817 if (!s1->do_debug)
1818 return;
1819 debug_info_root = NULL;
1820 debug_info = NULL;
1821 tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
1822 f = put_new_file(s1);
1823 if (!f)
1824 return;
1825
1826 if (s1->dwarf) {
1827 tcc_debug_line(s1);
1828 dwarf_info.func = sym;
1829 dwarf_info.line = file->line_num;
1830 if (s1->do_backtrace) {
1831 int i, len;
1832
1833 dwarf_line_op(s1, 0); // extended
1834 dwarf_uleb128_op(s1, strlen(funcname) + 2);
1835 dwarf_line_op(s1, DW_LNE_hi_user - 1);
1836 len = strlen(funcname) + 1;
1837 for (i = 0; i < len; i++)
1838 dwarf_line_op(s1, funcname[i]);
1839 }
1840 }
1841 else
1842 {
1843 cstr_new (&debug_str);
1844 cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
1845 tcc_get_debug_info(s1, sym->type.ref, &debug_str);
1846 put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
1847 cstr_free (&debug_str);
1848 tcc_debug_line(s1);
1849 }
1850 }
1851
1852 ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
1853 {
1854 if (!s1->do_debug)
1855 return;
1856 if (s1->dwarf) {
1857 dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
1858 : DW_LNS_set_epilogue_begin);
1859 }
1860 }
1861
1862 /* put function size */
1863 ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
1864 {
1865 /* lldb does not like function end and next function start at same pc */
1866 int min_instr_len;
1867
1868 if (!s1->do_debug)
1869 return;
1870 min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
1871 ind -= min_instr_len;
1872 tcc_debug_line(s1);
1873 ind += min_instr_len;
1874 tcc_debug_stabn(s1, N_RBRAC, size);
1875 if (s1->dwarf) {
1876 int func_sib = 0;
1877 Sym *sym = dwarf_info.func;
1878 int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
1879
1880 dwarf_data1(dwarf_info_section,
1881 sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
1882 : DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
1883 if ((sym->type.t & VT_STATIC) == 0)
1884 dwarf_data1(dwarf_info_section, 1);
1885 dwarf_strp(dwarf_info_section, funcname);
1886 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1887 dwarf_uleb128(dwarf_info_section, dwarf_info.line);
1888 tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
1889 dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
1890 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1891 #if PTR_SIZE == 4
1892 dwarf_data4(dwarf_info_section, func_ind); // low_pc
1893 dwarf_data4(dwarf_info_section, size); // high_pc
1894 #else
1895 dwarf_data8(dwarf_info_section, func_ind); // low_pc
1896 dwarf_data8(dwarf_info_section, size); // high_pc
1897 #endif
1898 func_sib = dwarf_info_section->data_offset;
1899 dwarf_data4(dwarf_info_section, 0); // sibling
1900 dwarf_data1(dwarf_info_section, 1);
1901 #if defined(TCC_TARGET_I386)
1902 dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
1903 #elif defined(TCC_TARGET_X86_64)
1904 dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
1905 #elif defined TCC_TARGET_ARM
1906 dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
1907 #elif defined TCC_TARGET_ARM64
1908 dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
1909 #elif defined TCC_TARGET_RISCV64
1910 dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
1911 #else
1912 dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
1913 #endif
1914 tcc_debug_finish (s1, debug_info_root);
1915 dwarf_data1(dwarf_info_section, 0);
1916 write32le(dwarf_info_section->data + func_sib,
1917 dwarf_info_section->data_offset - dwarf_info.start);
1918 }
1919 else
1920 {
1921 tcc_debug_finish (s1, debug_info_root);
1922 }
1923 }
1924
1925
1926 ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
1927 {
1928 if (!s1->do_debug)
1929 return;
1930 if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
1931 return;
1932 if (s1->dwarf) {
1933 int debug_type;
1934
1935 debug_type = tcc_get_dwarf_info(s1, sym);
1936 dwarf_data1(dwarf_info_section,
1937 sym_bind == STB_GLOBAL
1938 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1939 : DWARF_ABBREV_VARIABLE_STATIC);
1940 dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
1941 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1942 dwarf_uleb128(dwarf_info_section, file->line_num);
1943 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1944 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1945 if (sym_bind == STB_GLOBAL)
1946 dwarf_data1(dwarf_info_section, 1);
1947 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1948 dwarf_data1(dwarf_info_section, DW_OP_addr);
1949 greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
1950 R_DATA_PTR, 0);
1951 #if PTR_SIZE == 4
1952 dwarf_data4(dwarf_info_section, 0);
1953 #else
1954 dwarf_data8(dwarf_info_section, 0);
1955 #endif
1956 }
1957 else
1958 {
1959 Section *s = sh_num == SHN_COMMON ? common_section
1960 : s1->sections[sh_num];
1961 CString str;
1962
1963 cstr_new (&str);
1964 cstr_printf (&str, "%s:%c",
1965 get_tok_str(sym->v, NULL),
1966 sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
1967 );
1968 tcc_get_debug_info(s1, sym, &str);
1969 if (sym_bind == STB_GLOBAL)
1970 tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
1971 else
1972 tcc_debug_stabs(s1, str.data,
1973 (sym->type.t & VT_STATIC) && data_section == s
1974 ? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
1975 cstr_free (&str);
1976 }
1977 }
1978
1979 ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
1980 {
1981 if (!s1->do_debug)
1982 return;
1983 if (s1->dwarf) {
1984 int debug_type;
1985
1986 debug_type = tcc_get_dwarf_info(s1, sym);
1987 if (debug_type != -1) {
1988 dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
1989 dwarf_strp(dwarf_info_section, get_tok_str(sym->v & ~SYM_FIELD, NULL));
1990 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1991 dwarf_uleb128(dwarf_info_section, file->line_num);
1992 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1993 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1994 }
1995 }
1996 else
1997 {
1998 CString str;
1999 cstr_new (&str);
2000 cstr_printf (&str, "%s:t",
2001 (sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
2002 ? "" : get_tok_str(sym->v & ~SYM_FIELD, NULL));
2003 tcc_get_debug_info(s1, sym, &str);
2004 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
2005 cstr_free (&str);
2006 }
2007 }
2008
2009 /* ------------------------------------------------------------------------- */
2010 /* for section layout see lib/tcov.c */
2011
2012 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
2013
2014 ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
2015 {
2016 SValue sv;
2017 void *ptr;
2018 unsigned long last_offset = tcov_data.offset;
2019
2020 tcc_tcov_block_end (tcc_state, 0);
2021 if (s1->test_coverage == 0 || nocode_wanted)
2022 return;
2023
2024 if (tcov_data.last_file_name == 0 ||
2025 strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
2026 file->true_filename) != 0) {
2027 char wd[1024];
2028 CString cstr;
2029
2030 if (tcov_data.last_func_name)
2031 section_ptr_add(tcov_section, 1);
2032 if (tcov_data.last_file_name)
2033 section_ptr_add(tcov_section, 1);
2034 tcov_data.last_func_name = 0;
2035 cstr_new (&cstr);
2036 if (file->true_filename[0] == '/') {
2037 tcov_data.last_file_name = tcov_section->data_offset;
2038 cstr_printf (&cstr, "%s", file->true_filename);
2039 }
2040 else {
2041 getcwd (wd, sizeof(wd));
2042 tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
2043 cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
2044 }
2045 ptr = section_ptr_add(tcov_section, cstr.size + 1);
2046 strcpy((char *)ptr, cstr.data);
2047 #ifdef _WIN32
2048 normalize_slashes((char *)ptr);
2049 #endif
2050 cstr_free (&cstr);
2051 }
2052 if (tcov_data.last_func_name == 0 ||
2053 strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
2054 funcname) != 0) {
2055 size_t len;
2056
2057 if (tcov_data.last_func_name)
2058 section_ptr_add(tcov_section, 1);
2059 tcov_data.last_func_name = tcov_section->data_offset;
2060 len = strlen (funcname);
2061 ptr = section_ptr_add(tcov_section, len + 1);
2062 strcpy((char *)ptr, funcname);
2063 section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
2064 ptr = section_ptr_add(tcov_section, 8);
2065 write64le (ptr, file->line_num);
2066 }
2067 if (ind == tcov_data.ind && tcov_data.line == file->line_num)
2068 tcov_data.offset = last_offset;
2069 else {
2070 Sym label = {0};
2071 label.type.t = VT_LLONG | VT_STATIC;
2072
2073 ptr = section_ptr_add(tcov_section, 16);
2074 tcov_data.line = file->line_num;
2075 write64le (ptr, (tcov_data.line << 8) | 0xff);
2076 put_extern_sym(&label, tcov_section,
2077 ((unsigned char *)ptr - tcov_section->data) + 8, 0);
2078 sv.type = label.type;
2079 sv.r = VT_SYM | VT_LVAL | VT_CONST;
2080 sv.r2 = VT_CONST;
2081 sv.c.i = 0;
2082 sv.sym = &label;
2083 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
2084 defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
2085 defined TCC_TARGET_RISCV64
2086 gen_increment_tcov (&sv);
2087 #else
2088 vpushv(&sv);
2089 inc(0, TOK_INC);
2090 vpop();
2091 #endif
2092 tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
2093 tcov_data.ind = ind;
2094 }
2095 }
2096
2097 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
2098 {
2099 if (s1->test_coverage == 0)
2100 return;
2101 if (line == -1)
2102 line = tcov_data.line;
2103 if (tcov_data.offset) {
2104 void *ptr = tcov_section->data + tcov_data.offset;
2105 unsigned long long nline = line ? line : file->line_num;
2106
2107 write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
2108 tcov_data.offset = 0;
2109 }
2110 }
2111
2112 ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
2113 {
2114 if (s1->test_coverage == 0)
2115 return;
2116 if (tcov_data.line != file->line_num) {
2117 if ((tcov_data.line + 1) != file->line_num) {
2118 tcc_tcov_block_end (s1, -1);
2119 if (start)
2120 tcc_tcov_block_begin (s1);
2121 }
2122 else
2123 tcov_data.line = file->line_num;
2124 }
2125 }
2126
2127 ST_FUNC void tcc_tcov_start(TCCState *s1)
2128 {
2129 if (s1->test_coverage == 0)
2130 return;
2131 if (!s1->dState)
2132 s1->dState = tcc_mallocz(sizeof *s1->dState);
2133 memset (&tcov_data, 0, sizeof (tcov_data));
2134 if (tcov_section == NULL) {
2135 tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
2136 SHF_ALLOC | SHF_WRITE);
2137 section_ptr_add(tcov_section, 4); // pointer to executable name
2138 }
2139 }
2140
2141 ST_FUNC void tcc_tcov_end(TCCState *s1)
2142 {
2143 if (s1->test_coverage == 0)
2144 return;
2145 if (tcov_data.last_func_name)
2146 section_ptr_add(tcov_section, 1);
2147 if (tcov_data.last_file_name)
2148 section_ptr_add(tcov_section, 1);
2149 }
2150
2151 ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
2152 {
2153 tcov_data.ind = 0;
2154 }
2155
2156 /* ------------------------------------------------------------------------- */
2157 #undef last_line_num
2158 #undef new_file
2159 #undef section_sym
2160 #undef debug_next_type
2161 #undef debug_hash
2162 #undef n_debug_hash
2163 #undef debug_anon_hash
2164 #undef n_debug_anon_hash
2165 #undef debug_info
2166 #undef debug_info_root
2167 #undef dwarf_sym
2168 #undef dwarf_line
2169 #undef dwarf_info
2170 #undef tcov_data
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