Mercurial > hg > CbC > CbC_gcc
comparison gcc/dbxout.c @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 58ad6c70ea60 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a06113de4d67 |
---|---|
1 /* Output dbx-format symbol table information from GNU compiler. | |
2 Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 | |
4 Free Software Foundation, Inc. | |
5 | |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify it under | |
9 the terms of the GNU General Public License as published by the Free | |
10 Software Foundation; either version 3, or (at your option) any later | |
11 version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 | |
23 /* Output dbx-format symbol table data. | |
24 This consists of many symbol table entries, each of them | |
25 a .stabs assembler pseudo-op with four operands: | |
26 a "name" which is really a description of one symbol and its type, | |
27 a "code", which is a symbol defined in stab.h whose name starts with N_, | |
28 an unused operand always 0, | |
29 and a "value" which is an address or an offset. | |
30 The name is enclosed in doublequote characters. | |
31 | |
32 Each function, variable, typedef, and structure tag | |
33 has a symbol table entry to define it. | |
34 The beginning and end of each level of name scoping within | |
35 a function are also marked by special symbol table entries. | |
36 | |
37 The "name" consists of the symbol name, a colon, a kind-of-symbol letter, | |
38 and a data type number. The data type number may be followed by | |
39 "=" and a type definition; normally this will happen the first time | |
40 the type number is mentioned. The type definition may refer to | |
41 other types by number, and those type numbers may be followed | |
42 by "=" and nested definitions. | |
43 | |
44 This can make the "name" quite long. | |
45 When a name is more than 80 characters, we split the .stabs pseudo-op | |
46 into two .stabs pseudo-ops, both sharing the same "code" and "value". | |
47 The first one is marked as continued with a double-backslash at the | |
48 end of its "name". | |
49 | |
50 The kind-of-symbol letter distinguished function names from global | |
51 variables from file-scope variables from parameters from auto | |
52 variables in memory from typedef names from register variables. | |
53 See `dbxout_symbol'. | |
54 | |
55 The "code" is mostly redundant with the kind-of-symbol letter | |
56 that goes in the "name", but not entirely: for symbols located | |
57 in static storage, the "code" says which segment the address is in, | |
58 which controls how it is relocated. | |
59 | |
60 The "value" for a symbol in static storage | |
61 is the core address of the symbol (actually, the assembler | |
62 label for the symbol). For a symbol located in a stack slot | |
63 it is the stack offset; for one in a register, the register number. | |
64 For a typedef symbol, it is zero. | |
65 | |
66 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be | |
67 output while in the text section. | |
68 | |
69 For more on data type definitions, see `dbxout_type'. */ | |
70 | |
71 #include "config.h" | |
72 #include "system.h" | |
73 #include "coretypes.h" | |
74 #include "tm.h" | |
75 | |
76 #include "tree.h" | |
77 #include "rtl.h" | |
78 #include "flags.h" | |
79 #include "regs.h" | |
80 #include "insn-config.h" | |
81 #include "reload.h" | |
82 #include "output.h" | |
83 #include "dbxout.h" | |
84 #include "toplev.h" | |
85 #include "tm_p.h" | |
86 #include "ggc.h" | |
87 #include "debug.h" | |
88 #include "function.h" | |
89 #include "target.h" | |
90 #include "langhooks.h" | |
91 #include "obstack.h" | |
92 #include "expr.h" | |
93 | |
94 #ifdef XCOFF_DEBUGGING_INFO | |
95 #include "xcoffout.h" | |
96 #endif | |
97 | |
98 #define DBXOUT_DECR_NESTING \ | |
99 if (--debug_nesting == 0 && symbol_queue_index > 0) \ | |
100 { emit_pending_bincls_if_required (); debug_flush_symbol_queue (); } | |
101 | |
102 #define DBXOUT_DECR_NESTING_AND_RETURN(x) \ | |
103 do {--debug_nesting; return (x);} while (0) | |
104 | |
105 #ifndef ASM_STABS_OP | |
106 # ifdef XCOFF_DEBUGGING_INFO | |
107 # define ASM_STABS_OP "\t.stabx\t" | |
108 # else | |
109 # define ASM_STABS_OP "\t.stabs\t" | |
110 # endif | |
111 #endif | |
112 | |
113 #ifndef ASM_STABN_OP | |
114 #define ASM_STABN_OP "\t.stabn\t" | |
115 #endif | |
116 | |
117 #ifndef ASM_STABD_OP | |
118 #define ASM_STABD_OP "\t.stabd\t" | |
119 #endif | |
120 | |
121 #ifndef DBX_TYPE_DECL_STABS_CODE | |
122 #define DBX_TYPE_DECL_STABS_CODE N_LSYM | |
123 #endif | |
124 | |
125 #ifndef DBX_STATIC_CONST_VAR_CODE | |
126 #define DBX_STATIC_CONST_VAR_CODE N_FUN | |
127 #endif | |
128 | |
129 #ifndef DBX_REGPARM_STABS_CODE | |
130 #define DBX_REGPARM_STABS_CODE N_RSYM | |
131 #endif | |
132 | |
133 #ifndef DBX_REGPARM_STABS_LETTER | |
134 #define DBX_REGPARM_STABS_LETTER 'P' | |
135 #endif | |
136 | |
137 #ifndef NO_DBX_FUNCTION_END | |
138 #define NO_DBX_FUNCTION_END 0 | |
139 #endif | |
140 | |
141 #ifndef NO_DBX_BNSYM_ENSYM | |
142 #define NO_DBX_BNSYM_ENSYM 0 | |
143 #endif | |
144 | |
145 #ifndef NO_DBX_MAIN_SOURCE_DIRECTORY | |
146 #define NO_DBX_MAIN_SOURCE_DIRECTORY 0 | |
147 #endif | |
148 | |
149 #ifndef DBX_BLOCKS_FUNCTION_RELATIVE | |
150 #define DBX_BLOCKS_FUNCTION_RELATIVE 0 | |
151 #endif | |
152 | |
153 #ifndef DBX_LINES_FUNCTION_RELATIVE | |
154 #define DBX_LINES_FUNCTION_RELATIVE 0 | |
155 #endif | |
156 | |
157 #ifndef DBX_CONTIN_LENGTH | |
158 #define DBX_CONTIN_LENGTH 80 | |
159 #endif | |
160 | |
161 #ifndef DBX_CONTIN_CHAR | |
162 #define DBX_CONTIN_CHAR '\\' | |
163 #endif | |
164 | |
165 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED}; | |
166 | |
167 /* Structure recording information about a C data type. | |
168 The status element says whether we have yet output | |
169 the definition of the type. TYPE_XREF says we have | |
170 output it as a cross-reference only. | |
171 The file_number and type_number elements are used if DBX_USE_BINCL | |
172 is defined. */ | |
173 | |
174 struct typeinfo GTY(()) | |
175 { | |
176 enum typestatus status; | |
177 int file_number; | |
178 int type_number; | |
179 }; | |
180 | |
181 /* Vector recording information about C data types. | |
182 When we first notice a data type (a tree node), | |
183 we assign it a number using next_type_number. | |
184 That is its index in this vector. */ | |
185 | |
186 static GTY ((length ("typevec_len"))) struct typeinfo *typevec; | |
187 | |
188 /* Number of elements of space allocated in `typevec'. */ | |
189 | |
190 static GTY(()) int typevec_len; | |
191 | |
192 /* In dbx output, each type gets a unique number. | |
193 This is the number for the next type output. | |
194 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */ | |
195 | |
196 static GTY(()) int next_type_number; | |
197 | |
198 /* The C front end may call dbxout_symbol before dbxout_init runs. | |
199 We save all such decls in this list and output them when we get | |
200 to dbxout_init. */ | |
201 | |
202 static GTY(()) tree preinit_symbols; | |
203 | |
204 enum binclstatus {BINCL_NOT_REQUIRED, BINCL_PENDING, BINCL_PROCESSED}; | |
205 | |
206 /* When using N_BINCL in dbx output, each type number is actually a | |
207 pair of the file number and the type number within the file. | |
208 This is a stack of input files. */ | |
209 | |
210 struct dbx_file | |
211 { | |
212 struct dbx_file *next; | |
213 int file_number; | |
214 int next_type_number; | |
215 enum binclstatus bincl_status; /* Keep track of lazy bincl. */ | |
216 const char *pending_bincl_name; /* Name of bincl. */ | |
217 struct dbx_file *prev; /* Chain to traverse all pending bincls. */ | |
218 }; | |
219 | |
220 /* This is the top of the stack. | |
221 | |
222 This is not saved for PCH, because restoring a PCH should not change it. | |
223 next_file_number does have to be saved, because the PCH may use some | |
224 file numbers; however, just before restoring a PCH, next_file_number | |
225 should always be 0 because we should not have needed any file numbers | |
226 yet. */ | |
227 | |
228 #if (defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)) \ | |
229 && defined (DBX_USE_BINCL) | |
230 static struct dbx_file *current_file; | |
231 #endif | |
232 | |
233 /* This is the next file number to use. */ | |
234 | |
235 static GTY(()) int next_file_number; | |
236 | |
237 /* A counter for dbxout_function_end. */ | |
238 | |
239 static GTY(()) int scope_labelno; | |
240 | |
241 /* A counter for dbxout_source_line. */ | |
242 | |
243 static GTY(()) int dbxout_source_line_counter; | |
244 | |
245 /* Number for the next N_SOL filename stabs label. The number 0 is reserved | |
246 for the N_SO filename stabs label. */ | |
247 | |
248 static GTY(()) int source_label_number = 1; | |
249 | |
250 /* Last source file name mentioned in a NOTE insn. */ | |
251 | |
252 static GTY(()) const char *lastfile; | |
253 | |
254 /* Used by PCH machinery to detect if 'lastfile' should be reset to | |
255 base_input_file. */ | |
256 static GTY(()) int lastfile_is_base; | |
257 | |
258 /* Typical USG systems don't have stab.h, and they also have | |
259 no use for DBX-format debugging info. */ | |
260 | |
261 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) | |
262 | |
263 #ifdef DBX_USE_BINCL | |
264 /* If zero then there is no pending BINCL. */ | |
265 static int pending_bincls = 0; | |
266 #endif | |
267 | |
268 /* The original input file name. */ | |
269 static const char *base_input_file; | |
270 | |
271 #ifdef DEBUG_SYMS_TEXT | |
272 #define FORCE_TEXT switch_to_section (current_function_section ()) | |
273 #else | |
274 #define FORCE_TEXT | |
275 #endif | |
276 | |
277 #include "gstab.h" | |
278 | |
279 #define STAB_CODE_TYPE enum __stab_debug_code | |
280 | |
281 /* 1 if PARM is passed to this function in memory. */ | |
282 | |
283 #define PARM_PASSED_IN_MEMORY(PARM) \ | |
284 (MEM_P (DECL_INCOMING_RTL (PARM))) | |
285 | |
286 /* A C expression for the integer offset value of an automatic variable | |
287 (N_LSYM) having address X (an RTX). */ | |
288 #ifndef DEBUGGER_AUTO_OFFSET | |
289 #define DEBUGGER_AUTO_OFFSET(X) \ | |
290 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) | |
291 #endif | |
292 | |
293 /* A C expression for the integer offset value of an argument (N_PSYM) | |
294 having address X (an RTX). The nominal offset is OFFSET. */ | |
295 #ifndef DEBUGGER_ARG_OFFSET | |
296 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET) | |
297 #endif | |
298 | |
299 /* This obstack holds the stab string currently being constructed. We | |
300 build it up here, then write it out, so we can split long lines up | |
301 properly (see dbxout_finish_complex_stabs). */ | |
302 static struct obstack stabstr_ob; | |
303 static size_t stabstr_last_contin_point; | |
304 | |
305 #ifdef DBX_USE_BINCL | |
306 static void emit_bincl_stab (const char *c); | |
307 static void emit_pending_bincls (void); | |
308 #endif | |
309 static inline void emit_pending_bincls_if_required (void); | |
310 | |
311 static void dbxout_init (const char *); | |
312 | |
313 static void dbxout_finish (const char *); | |
314 static void dbxout_start_source_file (unsigned, const char *); | |
315 static void dbxout_end_source_file (unsigned); | |
316 static void dbxout_typedefs (tree); | |
317 static void dbxout_type_index (tree); | |
318 static void dbxout_args (tree); | |
319 static void dbxout_type_fields (tree); | |
320 static void dbxout_type_method_1 (tree); | |
321 static void dbxout_type_methods (tree); | |
322 static void dbxout_range_type (tree); | |
323 static void dbxout_type (tree, int); | |
324 static bool print_int_cst_bounds_in_octal_p (tree); | |
325 static bool is_fortran (void); | |
326 static void dbxout_type_name (tree); | |
327 static void dbxout_class_name_qualifiers (tree); | |
328 static int dbxout_symbol_location (tree, tree, const char *, rtx); | |
329 static void dbxout_symbol_name (tree, const char *, int); | |
330 static void dbxout_common_name (tree, const char *, STAB_CODE_TYPE); | |
331 static const char *dbxout_common_check (tree, int *); | |
332 static void dbxout_global_decl (tree); | |
333 static void dbxout_type_decl (tree, int); | |
334 static void dbxout_handle_pch (unsigned); | |
335 | |
336 /* The debug hooks structure. */ | |
337 #if defined (DBX_DEBUGGING_INFO) | |
338 | |
339 static void dbxout_source_line (unsigned int, const char *); | |
340 static void dbxout_begin_prologue (unsigned int, const char *); | |
341 static void dbxout_source_file (const char *); | |
342 static void dbxout_function_end (tree); | |
343 static void dbxout_begin_function (tree); | |
344 static void dbxout_begin_block (unsigned, unsigned); | |
345 static void dbxout_end_block (unsigned, unsigned); | |
346 static void dbxout_function_decl (tree); | |
347 | |
348 const struct gcc_debug_hooks dbx_debug_hooks = | |
349 { | |
350 dbxout_init, | |
351 dbxout_finish, | |
352 debug_nothing_int_charstar, | |
353 debug_nothing_int_charstar, | |
354 dbxout_start_source_file, | |
355 dbxout_end_source_file, | |
356 dbxout_begin_block, | |
357 dbxout_end_block, | |
358 debug_true_const_tree, /* ignore_block */ | |
359 dbxout_source_line, /* source_line */ | |
360 dbxout_begin_prologue, /* begin_prologue */ | |
361 debug_nothing_int_charstar, /* end_prologue */ | |
362 debug_nothing_int_charstar, /* end_epilogue */ | |
363 #ifdef DBX_FUNCTION_FIRST | |
364 dbxout_begin_function, | |
365 #else | |
366 debug_nothing_tree, /* begin_function */ | |
367 #endif | |
368 debug_nothing_int, /* end_function */ | |
369 dbxout_function_decl, | |
370 dbxout_global_decl, /* global_decl */ | |
371 dbxout_type_decl, /* type_decl */ | |
372 debug_nothing_tree_tree_tree_bool, /* imported_module_or_decl */ | |
373 debug_nothing_tree, /* deferred_inline_function */ | |
374 debug_nothing_tree, /* outlining_inline_function */ | |
375 debug_nothing_rtx, /* label */ | |
376 dbxout_handle_pch, /* handle_pch */ | |
377 debug_nothing_rtx, /* var_location */ | |
378 debug_nothing_void, /* switch_text_section */ | |
379 0 /* start_end_main_source_file */ | |
380 }; | |
381 #endif /* DBX_DEBUGGING_INFO */ | |
382 | |
383 #if defined (XCOFF_DEBUGGING_INFO) | |
384 const struct gcc_debug_hooks xcoff_debug_hooks = | |
385 { | |
386 dbxout_init, | |
387 dbxout_finish, | |
388 debug_nothing_int_charstar, | |
389 debug_nothing_int_charstar, | |
390 dbxout_start_source_file, | |
391 dbxout_end_source_file, | |
392 xcoffout_begin_block, | |
393 xcoffout_end_block, | |
394 debug_true_const_tree, /* ignore_block */ | |
395 xcoffout_source_line, | |
396 xcoffout_begin_prologue, /* begin_prologue */ | |
397 debug_nothing_int_charstar, /* end_prologue */ | |
398 xcoffout_end_epilogue, | |
399 debug_nothing_tree, /* begin_function */ | |
400 xcoffout_end_function, | |
401 debug_nothing_tree, /* function_decl */ | |
402 dbxout_global_decl, /* global_decl */ | |
403 dbxout_type_decl, /* type_decl */ | |
404 debug_nothing_tree_tree_tree_bool, /* imported_module_or_decl */ | |
405 debug_nothing_tree, /* deferred_inline_function */ | |
406 debug_nothing_tree, /* outlining_inline_function */ | |
407 debug_nothing_rtx, /* label */ | |
408 dbxout_handle_pch, /* handle_pch */ | |
409 debug_nothing_rtx, /* var_location */ | |
410 debug_nothing_void, /* switch_text_section */ | |
411 0 /* start_end_main_source_file */ | |
412 }; | |
413 #endif /* XCOFF_DEBUGGING_INFO */ | |
414 | |
415 /* Numeric formatting helper macro. Note that this does not handle | |
416 hexadecimal. */ | |
417 #define NUMBER_FMT_LOOP(P, NUM, BASE) \ | |
418 do \ | |
419 { \ | |
420 int digit = NUM % BASE; \ | |
421 NUM /= BASE; \ | |
422 *--P = digit + '0'; \ | |
423 } \ | |
424 while (NUM > 0) | |
425 | |
426 /* Utility: write a decimal integer NUM to asm_out_file. */ | |
427 void | |
428 dbxout_int (int num) | |
429 { | |
430 char buf[64]; | |
431 char *p = buf + sizeof buf; | |
432 unsigned int unum; | |
433 | |
434 if (num == 0) | |
435 { | |
436 putc ('0', asm_out_file); | |
437 return; | |
438 } | |
439 if (num < 0) | |
440 { | |
441 putc ('-', asm_out_file); | |
442 unum = -num; | |
443 } | |
444 else | |
445 unum = num; | |
446 | |
447 NUMBER_FMT_LOOP (p, unum, 10); | |
448 | |
449 while (p < buf + sizeof buf) | |
450 { | |
451 putc (*p, asm_out_file); | |
452 p++; | |
453 } | |
454 } | |
455 | |
456 | |
457 /* Primitives for emitting simple stabs directives. All other stabs | |
458 routines should use these functions instead of directly emitting | |
459 stabs. They are exported because machine-dependent code may need | |
460 to invoke them, e.g. in a DBX_OUTPUT_* macro whose definition | |
461 forwards to code in CPU.c. */ | |
462 | |
463 /* The following functions should all be called immediately after one | |
464 of the dbxout_begin_stab* functions (below). They write out | |
465 various things as the value of a stab. */ | |
466 | |
467 /* Write out a literal zero as the value of a stab. */ | |
468 void | |
469 dbxout_stab_value_zero (void) | |
470 { | |
471 fputs ("0\n", asm_out_file); | |
472 } | |
473 | |
474 /* Write out the label LABEL as the value of a stab. */ | |
475 void | |
476 dbxout_stab_value_label (const char *label) | |
477 { | |
478 assemble_name (asm_out_file, label); | |
479 putc ('\n', asm_out_file); | |
480 } | |
481 | |
482 /* Write out the difference of two labels, LABEL - BASE, as the value | |
483 of a stab. */ | |
484 void | |
485 dbxout_stab_value_label_diff (const char *label, const char *base) | |
486 { | |
487 assemble_name (asm_out_file, label); | |
488 putc ('-', asm_out_file); | |
489 assemble_name (asm_out_file, base); | |
490 putc ('\n', asm_out_file); | |
491 } | |
492 | |
493 /* Write out an internal label as the value of a stab, and immediately | |
494 emit that internal label. This should be used only when | |
495 dbxout_stabd will not work. STEM is the name stem of the label, | |
496 COUNTERP is a pointer to a counter variable which will be used to | |
497 guarantee label uniqueness. */ | |
498 void | |
499 dbxout_stab_value_internal_label (const char *stem, int *counterp) | |
500 { | |
501 char label[100]; | |
502 int counter = counterp ? (*counterp)++ : 0; | |
503 | |
504 ASM_GENERATE_INTERNAL_LABEL (label, stem, counter); | |
505 dbxout_stab_value_label (label); | |
506 targetm.asm_out.internal_label (asm_out_file, stem, counter); | |
507 } | |
508 | |
509 /* Write out the difference between BASE and an internal label as the | |
510 value of a stab, and immediately emit that internal label. STEM and | |
511 COUNTERP are as for dbxout_stab_value_internal_label. */ | |
512 void | |
513 dbxout_stab_value_internal_label_diff (const char *stem, int *counterp, | |
514 const char *base) | |
515 { | |
516 char label[100]; | |
517 int counter = counterp ? (*counterp)++ : 0; | |
518 | |
519 ASM_GENERATE_INTERNAL_LABEL (label, stem, counter); | |
520 dbxout_stab_value_label_diff (label, base); | |
521 targetm.asm_out.internal_label (asm_out_file, stem, counter); | |
522 } | |
523 | |
524 /* The following functions produce specific kinds of stab directives. */ | |
525 | |
526 /* Write a .stabd directive with type STYPE and desc SDESC to asm_out_file. */ | |
527 void | |
528 dbxout_stabd (int stype, int sdesc) | |
529 { | |
530 fputs (ASM_STABD_OP, asm_out_file); | |
531 dbxout_int (stype); | |
532 fputs (",0,", asm_out_file); | |
533 dbxout_int (sdesc); | |
534 putc ('\n', asm_out_file); | |
535 } | |
536 | |
537 /* Write a .stabn directive with type STYPE. This function stops | |
538 short of emitting the value field, which is the responsibility of | |
539 the caller (normally it will be either a symbol or the difference | |
540 of two symbols). */ | |
541 | |
542 void | |
543 dbxout_begin_stabn (int stype) | |
544 { | |
545 fputs (ASM_STABN_OP, asm_out_file); | |
546 dbxout_int (stype); | |
547 fputs (",0,0,", asm_out_file); | |
548 } | |
549 | |
550 /* Write a .stabn directive with type N_SLINE and desc LINE. As above, | |
551 the value field is the responsibility of the caller. */ | |
552 void | |
553 dbxout_begin_stabn_sline (int lineno) | |
554 { | |
555 fputs (ASM_STABN_OP, asm_out_file); | |
556 dbxout_int (N_SLINE); | |
557 fputs (",0,", asm_out_file); | |
558 dbxout_int (lineno); | |
559 putc (',', asm_out_file); | |
560 } | |
561 | |
562 /* Begin a .stabs directive with string "", type STYPE, and desc and | |
563 other fields 0. The value field is the responsibility of the | |
564 caller. This function cannot be used for .stabx directives. */ | |
565 void | |
566 dbxout_begin_empty_stabs (int stype) | |
567 { | |
568 fputs (ASM_STABS_OP, asm_out_file); | |
569 fputs ("\"\",", asm_out_file); | |
570 dbxout_int (stype); | |
571 fputs (",0,0,", asm_out_file); | |
572 } | |
573 | |
574 /* Begin a .stabs directive with string STR, type STYPE, and desc 0. | |
575 The value field is the responsibility of the caller. */ | |
576 void | |
577 dbxout_begin_simple_stabs (const char *str, int stype) | |
578 { | |
579 fputs (ASM_STABS_OP, asm_out_file); | |
580 output_quoted_string (asm_out_file, str); | |
581 putc (',', asm_out_file); | |
582 dbxout_int (stype); | |
583 fputs (",0,0,", asm_out_file); | |
584 } | |
585 | |
586 /* As above but use SDESC for the desc field. */ | |
587 void | |
588 dbxout_begin_simple_stabs_desc (const char *str, int stype, int sdesc) | |
589 { | |
590 fputs (ASM_STABS_OP, asm_out_file); | |
591 output_quoted_string (asm_out_file, str); | |
592 putc (',', asm_out_file); | |
593 dbxout_int (stype); | |
594 fputs (",0,", asm_out_file); | |
595 dbxout_int (sdesc); | |
596 putc (',', asm_out_file); | |
597 } | |
598 | |
599 /* The next set of functions are entirely concerned with production of | |
600 "complex" .stabs directives: that is, .stabs directives whose | |
601 strings have to be constructed piecemeal. dbxout_type, | |
602 dbxout_symbol, etc. use these routines heavily. The string is queued | |
603 up in an obstack, then written out by dbxout_finish_complex_stabs, which | |
604 is also responsible for splitting it up if it exceeds DBX_CONTIN_LENGTH. | |
605 (You might think it would be more efficient to go straight to stdio | |
606 when DBX_CONTIN_LENGTH is 0 (i.e. no length limit) but that turns | |
607 out not to be the case, and anyway this needs fewer #ifdefs.) */ | |
608 | |
609 /* Begin a complex .stabs directive. If we can, write the initial | |
610 ASM_STABS_OP to the asm_out_file. */ | |
611 | |
612 static void | |
613 dbxout_begin_complex_stabs (void) | |
614 { | |
615 emit_pending_bincls_if_required (); | |
616 FORCE_TEXT; | |
617 fputs (ASM_STABS_OP, asm_out_file); | |
618 putc ('"', asm_out_file); | |
619 gcc_assert (stabstr_last_contin_point == 0); | |
620 } | |
621 | |
622 /* As above, but do not force text or emit pending bincls. This is | |
623 used by dbxout_symbol_location, which needs to do something else. */ | |
624 static void | |
625 dbxout_begin_complex_stabs_noforcetext (void) | |
626 { | |
627 fputs (ASM_STABS_OP, asm_out_file); | |
628 putc ('"', asm_out_file); | |
629 gcc_assert (stabstr_last_contin_point == 0); | |
630 } | |
631 | |
632 /* Add CHR, a single character, to the string being built. */ | |
633 #define stabstr_C(chr) obstack_1grow (&stabstr_ob, chr) | |
634 | |
635 /* Add STR, a normal C string, to the string being built. */ | |
636 #define stabstr_S(str) obstack_grow (&stabstr_ob, str, strlen(str)) | |
637 | |
638 /* Add the text of ID, an IDENTIFIER_NODE, to the string being built. */ | |
639 #define stabstr_I(id) obstack_grow (&stabstr_ob, \ | |
640 IDENTIFIER_POINTER (id), \ | |
641 IDENTIFIER_LENGTH (id)) | |
642 | |
643 /* Add NUM, a signed decimal number, to the string being built. */ | |
644 static void | |
645 stabstr_D (HOST_WIDE_INT num) | |
646 { | |
647 char buf[64]; | |
648 char *p = buf + sizeof buf; | |
649 unsigned int unum; | |
650 | |
651 if (num == 0) | |
652 { | |
653 stabstr_C ('0'); | |
654 return; | |
655 } | |
656 if (num < 0) | |
657 { | |
658 stabstr_C ('-'); | |
659 unum = -num; | |
660 } | |
661 else | |
662 unum = num; | |
663 | |
664 NUMBER_FMT_LOOP (p, unum, 10); | |
665 | |
666 obstack_grow (&stabstr_ob, p, (buf + sizeof buf) - p); | |
667 } | |
668 | |
669 /* Add NUM, an unsigned decimal number, to the string being built. */ | |
670 static void | |
671 stabstr_U (unsigned HOST_WIDE_INT num) | |
672 { | |
673 char buf[64]; | |
674 char *p = buf + sizeof buf; | |
675 if (num == 0) | |
676 { | |
677 stabstr_C ('0'); | |
678 return; | |
679 } | |
680 NUMBER_FMT_LOOP (p, num, 10); | |
681 obstack_grow (&stabstr_ob, p, (buf + sizeof buf) - p); | |
682 } | |
683 | |
684 /* Add CST, an INTEGER_CST tree, to the string being built as an | |
685 unsigned octal number. This routine handles values which are | |
686 larger than a single HOST_WIDE_INT. */ | |
687 static void | |
688 stabstr_O (tree cst) | |
689 { | |
690 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (cst); | |
691 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (cst); | |
692 | |
693 char buf[128]; | |
694 char *p = buf + sizeof buf; | |
695 | |
696 /* GDB wants constants with no extra leading "1" bits, so | |
697 we need to remove any sign-extension that might be | |
698 present. */ | |
699 { | |
700 const unsigned int width = TYPE_PRECISION (TREE_TYPE (cst)); | |
701 if (width == HOST_BITS_PER_WIDE_INT * 2) | |
702 ; | |
703 else if (width > HOST_BITS_PER_WIDE_INT) | |
704 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1); | |
705 else if (width == HOST_BITS_PER_WIDE_INT) | |
706 high = 0; | |
707 else | |
708 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1); | |
709 } | |
710 | |
711 /* Leading zero for base indicator. */ | |
712 stabstr_C ('0'); | |
713 | |
714 /* If the value is zero, the base indicator will serve as the value | |
715 all by itself. */ | |
716 if (high == 0 && low == 0) | |
717 return; | |
718 | |
719 /* If the high half is zero, we need only print the low half normally. */ | |
720 if (high == 0) | |
721 NUMBER_FMT_LOOP (p, low, 8); | |
722 else | |
723 { | |
724 /* When high != 0, we need to print enough zeroes from low to | |
725 give the digits from high their proper place-values. Hence | |
726 NUMBER_FMT_LOOP cannot be used. */ | |
727 const int n_digits = HOST_BITS_PER_WIDE_INT / 3; | |
728 int i; | |
729 | |
730 for (i = 1; i <= n_digits; i++) | |
731 { | |
732 unsigned int digit = low % 8; | |
733 low /= 8; | |
734 *--p = '0' + digit; | |
735 } | |
736 | |
737 /* Octal digits carry exactly three bits of information. The | |
738 width of a HOST_WIDE_INT is not normally a multiple of three. | |
739 Therefore, the next digit printed probably needs to carry | |
740 information from both low and high. */ | |
741 if (HOST_BITS_PER_WIDE_INT % 3 != 0) | |
742 { | |
743 const int n_leftover_bits = HOST_BITS_PER_WIDE_INT % 3; | |
744 const int n_bits_from_high = 3 - n_leftover_bits; | |
745 | |
746 const unsigned HOST_WIDE_INT | |
747 low_mask = (((unsigned HOST_WIDE_INT)1) << n_leftover_bits) - 1; | |
748 const unsigned HOST_WIDE_INT | |
749 high_mask = (((unsigned HOST_WIDE_INT)1) << n_bits_from_high) - 1; | |
750 | |
751 unsigned int digit; | |
752 | |
753 /* At this point, only the bottom n_leftover_bits bits of low | |
754 should be set. */ | |
755 gcc_assert (!(low & ~low_mask)); | |
756 | |
757 digit = (low | ((high & high_mask) << n_leftover_bits)); | |
758 high >>= n_bits_from_high; | |
759 | |
760 *--p = '0' + digit; | |
761 } | |
762 | |
763 /* Now we can format high in the normal manner. However, if | |
764 the only bits of high that were set were handled by the | |
765 digit split between low and high, high will now be zero, and | |
766 we don't want to print extra digits in that case. */ | |
767 if (high) | |
768 NUMBER_FMT_LOOP (p, high, 8); | |
769 } | |
770 | |
771 obstack_grow (&stabstr_ob, p, (buf + sizeof buf) - p); | |
772 } | |
773 | |
774 /* Called whenever it is safe to break a stabs string into multiple | |
775 .stabs directives. If the current string has exceeded the limit | |
776 set by DBX_CONTIN_LENGTH, mark the current position in the buffer | |
777 as a continuation point by inserting DBX_CONTIN_CHAR (doubled if | |
778 it is a backslash) and a null character. */ | |
779 static inline void | |
780 stabstr_continue (void) | |
781 { | |
782 if (DBX_CONTIN_LENGTH > 0 | |
783 && obstack_object_size (&stabstr_ob) - stabstr_last_contin_point | |
784 > DBX_CONTIN_LENGTH) | |
785 { | |
786 if (DBX_CONTIN_CHAR == '\\') | |
787 obstack_1grow (&stabstr_ob, '\\'); | |
788 obstack_1grow (&stabstr_ob, DBX_CONTIN_CHAR); | |
789 obstack_1grow (&stabstr_ob, '\0'); | |
790 stabstr_last_contin_point = obstack_object_size (&stabstr_ob); | |
791 } | |
792 } | |
793 #define CONTIN stabstr_continue () | |
794 | |
795 /* Macro subroutine of dbxout_finish_complex_stabs, which emits | |
796 all of the arguments to the .stabs directive after the string. | |
797 Overridden by xcoffout.h. CODE is the stabs code for this symbol; | |
798 LINE is the source line to write into the desc field (in extended | |
799 mode); SYM is the symbol itself. | |
800 | |
801 ADDR, LABEL, and NUMBER are three different ways to represent the | |
802 stabs value field. At most one of these should be nonzero. | |
803 | |
804 ADDR is used most of the time; it represents the value as an | |
805 RTL address constant. | |
806 | |
807 LABEL is used (currently) only for N_CATCH stabs; it represents | |
808 the value as a string suitable for assemble_name. | |
809 | |
810 NUMBER is used when the value is an offset from an implicit base | |
811 pointer (e.g. for a stack variable), or an index (e.g. for a | |
812 register variable). It represents the value as a decimal integer. */ | |
813 | |
814 #ifndef DBX_FINISH_STABS | |
815 #define DBX_FINISH_STABS(SYM, CODE, LINE, ADDR, LABEL, NUMBER) \ | |
816 do { \ | |
817 int line_ = use_gnu_debug_info_extensions ? LINE : 0; \ | |
818 \ | |
819 dbxout_int (CODE); \ | |
820 fputs (",0,", asm_out_file); \ | |
821 dbxout_int (line_); \ | |
822 putc (',', asm_out_file); \ | |
823 if (ADDR) \ | |
824 output_addr_const (asm_out_file, ADDR); \ | |
825 else if (LABEL) \ | |
826 assemble_name (asm_out_file, LABEL); \ | |
827 else \ | |
828 dbxout_int (NUMBER); \ | |
829 putc ('\n', asm_out_file); \ | |
830 } while (0) | |
831 #endif | |
832 | |
833 /* Finish the emission of a complex .stabs directive. When DBX_CONTIN_LENGTH | |
834 is zero, this has only to emit the close quote and the remainder of | |
835 the arguments. When it is nonzero, the string has been marshalled in | |
836 stabstr_ob, and this routine is responsible for breaking it up into | |
837 DBX_CONTIN_LENGTH-sized chunks. | |
838 | |
839 SYM is the DECL of the symbol under consideration; it is used only | |
840 for its DECL_SOURCE_LINE. The other arguments are all passed directly | |
841 to DBX_FINISH_STABS; see above for details. */ | |
842 | |
843 static void | |
844 dbxout_finish_complex_stabs (tree sym, STAB_CODE_TYPE code, | |
845 rtx addr, const char *label, int number) | |
846 { | |
847 int line ATTRIBUTE_UNUSED; | |
848 char *str; | |
849 size_t len; | |
850 | |
851 line = sym ? DECL_SOURCE_LINE (sym) : 0; | |
852 if (DBX_CONTIN_LENGTH > 0) | |
853 { | |
854 char *chunk; | |
855 size_t chunklen; | |
856 | |
857 /* Nul-terminate the growing string, then get its size and | |
858 address. */ | |
859 obstack_1grow (&stabstr_ob, '\0'); | |
860 | |
861 len = obstack_object_size (&stabstr_ob); | |
862 chunk = str = XOBFINISH (&stabstr_ob, char *); | |
863 | |
864 /* Within the buffer are a sequence of NUL-separated strings, | |
865 each of which is to be written out as a separate stab | |
866 directive. */ | |
867 for (;;) | |
868 { | |
869 chunklen = strlen (chunk); | |
870 fwrite (chunk, 1, chunklen, asm_out_file); | |
871 fputs ("\",", asm_out_file); | |
872 | |
873 /* Must add an extra byte to account for the NUL separator. */ | |
874 chunk += chunklen + 1; | |
875 len -= chunklen + 1; | |
876 | |
877 /* Only put a line number on the last stab in the sequence. */ | |
878 DBX_FINISH_STABS (sym, code, len == 0 ? line : 0, | |
879 addr, label, number); | |
880 if (len == 0) | |
881 break; | |
882 | |
883 fputs (ASM_STABS_OP, asm_out_file); | |
884 putc ('"', asm_out_file); | |
885 } | |
886 stabstr_last_contin_point = 0; | |
887 } | |
888 else | |
889 { | |
890 /* No continuations - we can put the whole string out at once. | |
891 It is faster to augment the string with the close quote and | |
892 comma than to do a two-character fputs. */ | |
893 obstack_grow (&stabstr_ob, "\",", 2); | |
894 len = obstack_object_size (&stabstr_ob); | |
895 str = XOBFINISH (&stabstr_ob, char *); | |
896 | |
897 fwrite (str, 1, len, asm_out_file); | |
898 DBX_FINISH_STABS (sym, code, line, addr, label, number); | |
899 } | |
900 obstack_free (&stabstr_ob, str); | |
901 } | |
902 | |
903 #if defined (DBX_DEBUGGING_INFO) | |
904 | |
905 static void | |
906 dbxout_function_end (tree decl) | |
907 { | |
908 char lscope_label_name[100]; | |
909 | |
910 /* The Lscope label must be emitted even if we aren't doing anything | |
911 else; dbxout_block needs it. */ | |
912 switch_to_section (function_section (current_function_decl)); | |
913 | |
914 /* Convert Lscope into the appropriate format for local labels in case | |
915 the system doesn't insert underscores in front of user generated | |
916 labels. */ | |
917 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name, "Lscope", scope_labelno); | |
918 targetm.asm_out.internal_label (asm_out_file, "Lscope", scope_labelno); | |
919 | |
920 /* The N_FUN tag at the end of the function is a GNU extension, | |
921 which may be undesirable, and is unnecessary if we do not have | |
922 named sections. */ | |
923 if (!use_gnu_debug_info_extensions | |
924 || NO_DBX_FUNCTION_END | |
925 || !targetm.have_named_sections | |
926 || DECL_IGNORED_P (decl)) | |
927 return; | |
928 | |
929 /* By convention, GCC will mark the end of a function with an N_FUN | |
930 symbol and an empty string. */ | |
931 if (flag_reorder_blocks_and_partition) | |
932 { | |
933 dbxout_begin_empty_stabs (N_FUN); | |
934 dbxout_stab_value_label_diff (crtl->subsections.hot_section_end_label, | |
935 crtl->subsections.hot_section_label); | |
936 dbxout_begin_empty_stabs (N_FUN); | |
937 dbxout_stab_value_label_diff (crtl->subsections.cold_section_end_label, | |
938 crtl->subsections.cold_section_label); | |
939 } | |
940 else | |
941 { | |
942 char begin_label[20]; | |
943 /* Reference current function start using LFBB. */ | |
944 ASM_GENERATE_INTERNAL_LABEL (begin_label, "LFBB", scope_labelno); | |
945 dbxout_begin_empty_stabs (N_FUN); | |
946 dbxout_stab_value_label_diff (lscope_label_name, begin_label); | |
947 } | |
948 | |
949 if (!NO_DBX_BNSYM_ENSYM && !flag_debug_only_used_symbols) | |
950 dbxout_stabd (N_ENSYM, 0); | |
951 } | |
952 #endif /* DBX_DEBUGGING_INFO */ | |
953 | |
954 /* Get lang description for N_SO stab. */ | |
955 static unsigned int ATTRIBUTE_UNUSED | |
956 get_lang_number (void) | |
957 { | |
958 const char *language_string = lang_hooks.name; | |
959 | |
960 if (strcmp (language_string, "GNU C") == 0) | |
961 return N_SO_C; | |
962 else if (strcmp (language_string, "GNU C++") == 0) | |
963 return N_SO_CC; | |
964 else if (strcmp (language_string, "GNU F77") == 0) | |
965 return N_SO_FORTRAN; | |
966 else if (strcmp (language_string, "GNU Fortran") == 0) | |
967 return N_SO_FORTRAN90; /* CHECKME */ | |
968 else if (strcmp (language_string, "GNU Pascal") == 0) | |
969 return N_SO_PASCAL; | |
970 else if (strcmp (language_string, "GNU Objective-C") == 0) | |
971 return N_SO_OBJC; | |
972 else if (strcmp (language_string, "GNU Objective-C++") == 0) | |
973 return N_SO_OBJCPLUS; | |
974 else | |
975 return 0; | |
976 | |
977 } | |
978 | |
979 static bool | |
980 is_fortran (void) | |
981 { | |
982 unsigned int lang = get_lang_number (); | |
983 | |
984 return (lang == N_SO_FORTRAN) || (lang == N_SO_FORTRAN90); | |
985 } | |
986 | |
987 /* At the beginning of compilation, start writing the symbol table. | |
988 Initialize `typevec' and output the standard data types of C. */ | |
989 | |
990 static void | |
991 dbxout_init (const char *input_file_name) | |
992 { | |
993 char ltext_label_name[100]; | |
994 bool used_ltext_label_name = false; | |
995 tree syms = lang_hooks.decls.getdecls (); | |
996 const char *mapped_name; | |
997 | |
998 typevec_len = 100; | |
999 typevec = GGC_CNEWVEC (struct typeinfo, typevec_len); | |
1000 | |
1001 /* stabstr_ob contains one string, which will be just fine with | |
1002 1-byte alignment. */ | |
1003 obstack_specify_allocation (&stabstr_ob, 0, 1, xmalloc, free); | |
1004 | |
1005 /* Convert Ltext into the appropriate format for local labels in case | |
1006 the system doesn't insert underscores in front of user generated | |
1007 labels. */ | |
1008 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0); | |
1009 | |
1010 /* Put the current working directory in an N_SO symbol. */ | |
1011 if (use_gnu_debug_info_extensions && !NO_DBX_MAIN_SOURCE_DIRECTORY) | |
1012 { | |
1013 static const char *cwd; | |
1014 | |
1015 if (!cwd) | |
1016 { | |
1017 cwd = get_src_pwd (); | |
1018 if (cwd[0] == '\0') | |
1019 cwd = "/"; | |
1020 else if (!IS_DIR_SEPARATOR (cwd[strlen (cwd) - 1])) | |
1021 cwd = concat (cwd, "/", NULL); | |
1022 cwd = remap_debug_filename (cwd); | |
1023 } | |
1024 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY | |
1025 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asm_out_file, cwd); | |
1026 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */ | |
1027 dbxout_begin_simple_stabs_desc (cwd, N_SO, get_lang_number ()); | |
1028 dbxout_stab_value_label (ltext_label_name); | |
1029 used_ltext_label_name = true; | |
1030 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */ | |
1031 } | |
1032 | |
1033 mapped_name = remap_debug_filename (input_file_name); | |
1034 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME | |
1035 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asm_out_file, mapped_name); | |
1036 #else | |
1037 dbxout_begin_simple_stabs_desc (mapped_name, N_SO, get_lang_number ()); | |
1038 dbxout_stab_value_label (ltext_label_name); | |
1039 used_ltext_label_name = true; | |
1040 #endif | |
1041 | |
1042 if (used_ltext_label_name) | |
1043 { | |
1044 switch_to_section (text_section); | |
1045 targetm.asm_out.internal_label (asm_out_file, "Ltext", 0); | |
1046 } | |
1047 | |
1048 /* Emit an N_OPT stab to indicate that this file was compiled by GCC. | |
1049 The string used is historical. */ | |
1050 #ifndef NO_DBX_GCC_MARKER | |
1051 dbxout_begin_simple_stabs ("gcc2_compiled.", N_OPT); | |
1052 dbxout_stab_value_zero (); | |
1053 #endif | |
1054 | |
1055 base_input_file = lastfile = input_file_name; | |
1056 | |
1057 next_type_number = 1; | |
1058 | |
1059 #ifdef DBX_USE_BINCL | |
1060 current_file = XNEW (struct dbx_file); | |
1061 current_file->next = NULL; | |
1062 current_file->file_number = 0; | |
1063 current_file->next_type_number = 1; | |
1064 next_file_number = 1; | |
1065 current_file->prev = NULL; | |
1066 current_file->bincl_status = BINCL_NOT_REQUIRED; | |
1067 current_file->pending_bincl_name = NULL; | |
1068 #endif | |
1069 | |
1070 /* Get all permanent types that have typedef names, and output them | |
1071 all, except for those already output. Some language front ends | |
1072 put these declarations in the top-level scope; some do not; | |
1073 the latter are responsible for calling debug_hooks->type_decl from | |
1074 their record_builtin_type function. */ | |
1075 dbxout_typedefs (syms); | |
1076 | |
1077 if (preinit_symbols) | |
1078 { | |
1079 tree t; | |
1080 for (t = nreverse (preinit_symbols); t; t = TREE_CHAIN (t)) | |
1081 dbxout_symbol (TREE_VALUE (t), 0); | |
1082 preinit_symbols = 0; | |
1083 } | |
1084 } | |
1085 | |
1086 /* Output any typedef names for types described by TYPE_DECLs in SYMS. */ | |
1087 | |
1088 static void | |
1089 dbxout_typedefs (tree syms) | |
1090 { | |
1091 for (; syms != NULL_TREE; syms = TREE_CHAIN (syms)) | |
1092 { | |
1093 if (TREE_CODE (syms) == TYPE_DECL) | |
1094 { | |
1095 tree type = TREE_TYPE (syms); | |
1096 if (TYPE_NAME (type) | |
1097 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1098 && COMPLETE_OR_VOID_TYPE_P (type) | |
1099 && ! TREE_ASM_WRITTEN (TYPE_NAME (type))) | |
1100 dbxout_symbol (TYPE_NAME (type), 0); | |
1101 } | |
1102 } | |
1103 } | |
1104 | |
1105 #ifdef DBX_USE_BINCL | |
1106 /* Emit BINCL stab using given name. */ | |
1107 static void | |
1108 emit_bincl_stab (const char *name) | |
1109 { | |
1110 dbxout_begin_simple_stabs (name, N_BINCL); | |
1111 dbxout_stab_value_zero (); | |
1112 } | |
1113 | |
1114 /* If there are pending bincls then it is time to emit all of them. */ | |
1115 | |
1116 static inline void | |
1117 emit_pending_bincls_if_required (void) | |
1118 { | |
1119 if (pending_bincls) | |
1120 emit_pending_bincls (); | |
1121 } | |
1122 | |
1123 /* Emit all pending bincls. */ | |
1124 | |
1125 static void | |
1126 emit_pending_bincls (void) | |
1127 { | |
1128 struct dbx_file *f = current_file; | |
1129 | |
1130 /* Find first pending bincl. */ | |
1131 while (f->bincl_status == BINCL_PENDING) | |
1132 f = f->next; | |
1133 | |
1134 /* Now emit all bincls. */ | |
1135 f = f->prev; | |
1136 | |
1137 while (f) | |
1138 { | |
1139 if (f->bincl_status == BINCL_PENDING) | |
1140 { | |
1141 emit_bincl_stab (f->pending_bincl_name); | |
1142 | |
1143 /* Update file number and status. */ | |
1144 f->file_number = next_file_number++; | |
1145 f->bincl_status = BINCL_PROCESSED; | |
1146 } | |
1147 if (f == current_file) | |
1148 break; | |
1149 f = f->prev; | |
1150 } | |
1151 | |
1152 /* All pending bincls have been emitted. */ | |
1153 pending_bincls = 0; | |
1154 } | |
1155 | |
1156 #else | |
1157 | |
1158 static inline void | |
1159 emit_pending_bincls_if_required (void) {} | |
1160 #endif | |
1161 | |
1162 /* Change to reading from a new source file. Generate a N_BINCL stab. */ | |
1163 | |
1164 static void | |
1165 dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED, | |
1166 const char *filename ATTRIBUTE_UNUSED) | |
1167 { | |
1168 #ifdef DBX_USE_BINCL | |
1169 struct dbx_file *n = XNEW (struct dbx_file); | |
1170 | |
1171 n->next = current_file; | |
1172 n->next_type_number = 1; | |
1173 /* Do not assign file number now. | |
1174 Delay it until we actually emit BINCL. */ | |
1175 n->file_number = 0; | |
1176 n->prev = NULL; | |
1177 current_file->prev = n; | |
1178 n->bincl_status = BINCL_PENDING; | |
1179 n->pending_bincl_name = remap_debug_filename (filename); | |
1180 pending_bincls = 1; | |
1181 current_file = n; | |
1182 #endif | |
1183 } | |
1184 | |
1185 /* Revert to reading a previous source file. Generate a N_EINCL stab. */ | |
1186 | |
1187 static void | |
1188 dbxout_end_source_file (unsigned int line ATTRIBUTE_UNUSED) | |
1189 { | |
1190 #ifdef DBX_USE_BINCL | |
1191 /* Emit EINCL stab only if BINCL is not pending. */ | |
1192 if (current_file->bincl_status == BINCL_PROCESSED) | |
1193 { | |
1194 dbxout_begin_stabn (N_EINCL); | |
1195 dbxout_stab_value_zero (); | |
1196 } | |
1197 current_file->bincl_status = BINCL_NOT_REQUIRED; | |
1198 current_file = current_file->next; | |
1199 #endif | |
1200 } | |
1201 | |
1202 /* Handle a few odd cases that occur when trying to make PCH files work. */ | |
1203 | |
1204 static void | |
1205 dbxout_handle_pch (unsigned at_end) | |
1206 { | |
1207 if (! at_end) | |
1208 { | |
1209 /* When using the PCH, this file will be included, so we need to output | |
1210 a BINCL. */ | |
1211 dbxout_start_source_file (0, lastfile); | |
1212 | |
1213 /* The base file when using the PCH won't be the same as | |
1214 the base file when it's being generated. */ | |
1215 lastfile = NULL; | |
1216 } | |
1217 else | |
1218 { | |
1219 /* ... and an EINCL. */ | |
1220 dbxout_end_source_file (0); | |
1221 | |
1222 /* Deal with cases where 'lastfile' was never actually changed. */ | |
1223 lastfile_is_base = lastfile == NULL; | |
1224 } | |
1225 } | |
1226 | |
1227 #if defined (DBX_DEBUGGING_INFO) | |
1228 | |
1229 static void dbxout_block (tree, int, tree); | |
1230 | |
1231 /* Output debugging info to FILE to switch to sourcefile FILENAME. */ | |
1232 | |
1233 static void | |
1234 dbxout_source_file (const char *filename) | |
1235 { | |
1236 if (lastfile == 0 && lastfile_is_base) | |
1237 { | |
1238 lastfile = base_input_file; | |
1239 lastfile_is_base = 0; | |
1240 } | |
1241 | |
1242 if (filename && (lastfile == 0 || strcmp (filename, lastfile))) | |
1243 { | |
1244 /* Don't change section amid function. */ | |
1245 if (current_function_decl == NULL_TREE) | |
1246 switch_to_section (text_section); | |
1247 | |
1248 dbxout_begin_simple_stabs (remap_debug_filename (filename), N_SOL); | |
1249 dbxout_stab_value_internal_label ("Ltext", &source_label_number); | |
1250 lastfile = filename; | |
1251 } | |
1252 } | |
1253 | |
1254 /* Output N_BNSYM, line number symbol entry, and local symbol at | |
1255 function scope */ | |
1256 | |
1257 static void | |
1258 dbxout_begin_prologue (unsigned int lineno, const char *filename) | |
1259 { | |
1260 if (use_gnu_debug_info_extensions | |
1261 && !NO_DBX_FUNCTION_END | |
1262 && !NO_DBX_BNSYM_ENSYM | |
1263 && !flag_debug_only_used_symbols) | |
1264 dbxout_stabd (N_BNSYM, 0); | |
1265 | |
1266 /* pre-increment the scope counter */ | |
1267 scope_labelno++; | |
1268 | |
1269 dbxout_source_line (lineno, filename); | |
1270 /* Output function begin block at function scope, referenced | |
1271 by dbxout_block, dbxout_source_line and dbxout_function_end. */ | |
1272 emit_pending_bincls_if_required (); | |
1273 targetm.asm_out.internal_label (asm_out_file, "LFBB", scope_labelno); | |
1274 } | |
1275 | |
1276 /* Output a line number symbol entry for source file FILENAME and line | |
1277 number LINENO. */ | |
1278 | |
1279 static void | |
1280 dbxout_source_line (unsigned int lineno, const char *filename) | |
1281 { | |
1282 dbxout_source_file (filename); | |
1283 | |
1284 #ifdef DBX_OUTPUT_SOURCE_LINE | |
1285 DBX_OUTPUT_SOURCE_LINE (asm_out_file, lineno, dbxout_source_line_counter); | |
1286 #else | |
1287 if (DBX_LINES_FUNCTION_RELATIVE) | |
1288 { | |
1289 char begin_label[20]; | |
1290 dbxout_begin_stabn_sline (lineno); | |
1291 /* Reference current function start using LFBB. */ | |
1292 ASM_GENERATE_INTERNAL_LABEL (begin_label, "LFBB", scope_labelno); | |
1293 dbxout_stab_value_internal_label_diff ("LM", &dbxout_source_line_counter, | |
1294 begin_label); | |
1295 } | |
1296 else | |
1297 dbxout_stabd (N_SLINE, lineno); | |
1298 #endif | |
1299 } | |
1300 | |
1301 /* Describe the beginning of an internal block within a function. */ | |
1302 | |
1303 static void | |
1304 dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n) | |
1305 { | |
1306 emit_pending_bincls_if_required (); | |
1307 targetm.asm_out.internal_label (asm_out_file, "LBB", n); | |
1308 } | |
1309 | |
1310 /* Describe the end line-number of an internal block within a function. */ | |
1311 | |
1312 static void | |
1313 dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n) | |
1314 { | |
1315 emit_pending_bincls_if_required (); | |
1316 targetm.asm_out.internal_label (asm_out_file, "LBE", n); | |
1317 } | |
1318 | |
1319 /* Output dbx data for a function definition. | |
1320 This includes a definition of the function name itself (a symbol), | |
1321 definitions of the parameters (locating them in the parameter list) | |
1322 and then output the block that makes up the function's body | |
1323 (including all the auto variables of the function). */ | |
1324 | |
1325 static void | |
1326 dbxout_function_decl (tree decl) | |
1327 { | |
1328 emit_pending_bincls_if_required (); | |
1329 #ifndef DBX_FUNCTION_FIRST | |
1330 dbxout_begin_function (decl); | |
1331 #endif | |
1332 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl)); | |
1333 dbxout_function_end (decl); | |
1334 } | |
1335 | |
1336 #endif /* DBX_DEBUGGING_INFO */ | |
1337 | |
1338 /* Debug information for a global DECL. Called from toplev.c after | |
1339 compilation proper has finished. */ | |
1340 static void | |
1341 dbxout_global_decl (tree decl) | |
1342 { | |
1343 if (TREE_CODE (decl) == VAR_DECL && !DECL_EXTERNAL (decl)) | |
1344 { | |
1345 int saved_tree_used = TREE_USED (decl); | |
1346 TREE_USED (decl) = 1; | |
1347 dbxout_symbol (decl, 0); | |
1348 TREE_USED (decl) = saved_tree_used; | |
1349 } | |
1350 } | |
1351 | |
1352 /* This is just a function-type adapter; dbxout_symbol does exactly | |
1353 what we want but returns an int. */ | |
1354 static void | |
1355 dbxout_type_decl (tree decl, int local) | |
1356 { | |
1357 dbxout_symbol (decl, local); | |
1358 } | |
1359 | |
1360 /* At the end of compilation, finish writing the symbol table. | |
1361 The default is to call debug_free_queue but do nothing else. */ | |
1362 | |
1363 static void | |
1364 dbxout_finish (const char *filename ATTRIBUTE_UNUSED) | |
1365 { | |
1366 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END | |
1367 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asm_out_file, filename); | |
1368 #elif defined DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END | |
1369 { | |
1370 switch_to_section (text_section); | |
1371 dbxout_begin_empty_stabs (N_SO); | |
1372 dbxout_stab_value_internal_label ("Letext", 0); | |
1373 } | |
1374 #endif | |
1375 debug_free_queue (); | |
1376 } | |
1377 | |
1378 /* Output the index of a type. */ | |
1379 | |
1380 static void | |
1381 dbxout_type_index (tree type) | |
1382 { | |
1383 #ifndef DBX_USE_BINCL | |
1384 stabstr_D (TYPE_SYMTAB_ADDRESS (type)); | |
1385 #else | |
1386 struct typeinfo *t = &typevec[TYPE_SYMTAB_ADDRESS (type)]; | |
1387 stabstr_C ('('); | |
1388 stabstr_D (t->file_number); | |
1389 stabstr_C (','); | |
1390 stabstr_D (t->type_number); | |
1391 stabstr_C (')'); | |
1392 #endif | |
1393 } | |
1394 | |
1395 | |
1396 | |
1397 /* Used in several places: evaluates to '0' for a private decl, | |
1398 '1' for a protected decl, '2' for a public decl. */ | |
1399 #define DECL_ACCESSIBILITY_CHAR(DECL) \ | |
1400 (TREE_PRIVATE (DECL) ? '0' : TREE_PROTECTED (DECL) ? '1' : '2') | |
1401 | |
1402 /* Subroutine of `dbxout_type'. Output the type fields of TYPE. | |
1403 This must be a separate function because anonymous unions require | |
1404 recursive calls. */ | |
1405 | |
1406 static void | |
1407 dbxout_type_fields (tree type) | |
1408 { | |
1409 tree tem; | |
1410 | |
1411 /* Output the name, type, position (in bits), size (in bits) of each | |
1412 field that we can support. */ | |
1413 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem)) | |
1414 { | |
1415 /* If one of the nodes is an error_mark or its type is then | |
1416 return early. */ | |
1417 if (tem == error_mark_node || TREE_TYPE (tem) == error_mark_node) | |
1418 return; | |
1419 | |
1420 /* Omit here local type decls until we know how to support them. */ | |
1421 if (TREE_CODE (tem) == TYPE_DECL | |
1422 /* Omit here the nameless fields that are used to skip bits. */ | |
1423 || DECL_IGNORED_P (tem) | |
1424 /* Omit fields whose position or size are variable or too large to | |
1425 represent. */ | |
1426 || (TREE_CODE (tem) == FIELD_DECL | |
1427 && (! host_integerp (bit_position (tem), 0) | |
1428 || ! DECL_SIZE (tem) | |
1429 || ! host_integerp (DECL_SIZE (tem), 1)))) | |
1430 continue; | |
1431 | |
1432 else if (TREE_CODE (tem) != CONST_DECL) | |
1433 { | |
1434 /* Continue the line if necessary, | |
1435 but not before the first field. */ | |
1436 if (tem != TYPE_FIELDS (type)) | |
1437 CONTIN; | |
1438 | |
1439 if (DECL_NAME (tem)) | |
1440 stabstr_I (DECL_NAME (tem)); | |
1441 stabstr_C (':'); | |
1442 | |
1443 if (use_gnu_debug_info_extensions | |
1444 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem) | |
1445 || TREE_CODE (tem) != FIELD_DECL)) | |
1446 { | |
1447 stabstr_C ('/'); | |
1448 stabstr_C (DECL_ACCESSIBILITY_CHAR (tem)); | |
1449 } | |
1450 | |
1451 dbxout_type ((TREE_CODE (tem) == FIELD_DECL | |
1452 && DECL_BIT_FIELD_TYPE (tem)) | |
1453 ? DECL_BIT_FIELD_TYPE (tem) : TREE_TYPE (tem), 0); | |
1454 | |
1455 if (TREE_CODE (tem) == VAR_DECL) | |
1456 { | |
1457 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions) | |
1458 { | |
1459 tree name = DECL_ASSEMBLER_NAME (tem); | |
1460 | |
1461 stabstr_C (':'); | |
1462 stabstr_I (name); | |
1463 stabstr_C (';'); | |
1464 } | |
1465 else | |
1466 /* If TEM is non-static, GDB won't understand it. */ | |
1467 stabstr_S (",0,0;"); | |
1468 } | |
1469 else | |
1470 { | |
1471 stabstr_C (','); | |
1472 stabstr_D (int_bit_position (tem)); | |
1473 stabstr_C (','); | |
1474 stabstr_D (tree_low_cst (DECL_SIZE (tem), 1)); | |
1475 stabstr_C (';'); | |
1476 } | |
1477 } | |
1478 } | |
1479 } | |
1480 | |
1481 /* Subroutine of `dbxout_type_methods'. Output debug info about the | |
1482 method described DECL. */ | |
1483 | |
1484 static void | |
1485 dbxout_type_method_1 (tree decl) | |
1486 { | |
1487 char c1 = 'A', c2; | |
1488 | |
1489 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE) | |
1490 c2 = '?'; | |
1491 else /* it's a METHOD_TYPE. */ | |
1492 { | |
1493 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))); | |
1494 /* A for normal functions. | |
1495 B for `const' member functions. | |
1496 C for `volatile' member functions. | |
1497 D for `const volatile' member functions. */ | |
1498 if (TYPE_READONLY (TREE_TYPE (firstarg))) | |
1499 c1 += 1; | |
1500 if (TYPE_VOLATILE (TREE_TYPE (firstarg))) | |
1501 c1 += 2; | |
1502 | |
1503 if (DECL_VINDEX (decl)) | |
1504 c2 = '*'; | |
1505 else | |
1506 c2 = '.'; | |
1507 } | |
1508 | |
1509 /* ??? Output the mangled name, which contains an encoding of the | |
1510 method's type signature. May not be necessary anymore. */ | |
1511 stabstr_C (':'); | |
1512 stabstr_I (DECL_ASSEMBLER_NAME (decl)); | |
1513 stabstr_C (';'); | |
1514 stabstr_C (DECL_ACCESSIBILITY_CHAR (decl)); | |
1515 stabstr_C (c1); | |
1516 stabstr_C (c2); | |
1517 | |
1518 if (DECL_VINDEX (decl) && host_integerp (DECL_VINDEX (decl), 0)) | |
1519 { | |
1520 stabstr_D (tree_low_cst (DECL_VINDEX (decl), 0)); | |
1521 stabstr_C (';'); | |
1522 dbxout_type (DECL_CONTEXT (decl), 0); | |
1523 stabstr_C (';'); | |
1524 } | |
1525 } | |
1526 | |
1527 /* Subroutine of `dbxout_type'. Output debug info about the methods defined | |
1528 in TYPE. */ | |
1529 | |
1530 static void | |
1531 dbxout_type_methods (tree type) | |
1532 { | |
1533 /* C++: put out the method names and their parameter lists */ | |
1534 tree methods = TYPE_METHODS (type); | |
1535 tree fndecl; | |
1536 tree last; | |
1537 | |
1538 if (methods == NULL_TREE) | |
1539 return; | |
1540 | |
1541 if (TREE_CODE (methods) != TREE_VEC) | |
1542 fndecl = methods; | |
1543 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE) | |
1544 fndecl = TREE_VEC_ELT (methods, 0); | |
1545 else | |
1546 fndecl = TREE_VEC_ELT (methods, 1); | |
1547 | |
1548 while (fndecl) | |
1549 { | |
1550 int need_prefix = 1; | |
1551 | |
1552 /* Group together all the methods for the same operation. | |
1553 These differ in the types of the arguments. */ | |
1554 for (last = NULL_TREE; | |
1555 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last)); | |
1556 fndecl = TREE_CHAIN (fndecl)) | |
1557 /* Output the name of the field (after overloading), as | |
1558 well as the name of the field before overloading, along | |
1559 with its parameter list */ | |
1560 { | |
1561 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these | |
1562 include TEMPLATE_DECLs.) The debugger doesn't know what | |
1563 to do with such entities anyhow. */ | |
1564 if (TREE_CODE (fndecl) != FUNCTION_DECL) | |
1565 continue; | |
1566 | |
1567 CONTIN; | |
1568 | |
1569 last = fndecl; | |
1570 | |
1571 /* Also ignore abstract methods; those are only interesting to | |
1572 the DWARF backends. */ | |
1573 if (DECL_IGNORED_P (fndecl) || DECL_ABSTRACT (fndecl)) | |
1574 continue; | |
1575 | |
1576 /* Redundantly output the plain name, since that's what gdb | |
1577 expects. */ | |
1578 if (need_prefix) | |
1579 { | |
1580 stabstr_I (DECL_NAME (fndecl)); | |
1581 stabstr_S ("::"); | |
1582 need_prefix = 0; | |
1583 } | |
1584 | |
1585 dbxout_type (TREE_TYPE (fndecl), 0); | |
1586 dbxout_type_method_1 (fndecl); | |
1587 } | |
1588 if (!need_prefix) | |
1589 stabstr_C (';'); | |
1590 } | |
1591 } | |
1592 | |
1593 /* Emit a "range" type specification, which has the form: | |
1594 "r<index type>;<lower bound>;<upper bound>;". | |
1595 TYPE is an INTEGER_TYPE. */ | |
1596 | |
1597 static void | |
1598 dbxout_range_type (tree type) | |
1599 { | |
1600 stabstr_C ('r'); | |
1601 if (TREE_TYPE (type)) | |
1602 dbxout_type (TREE_TYPE (type), 0); | |
1603 else if (TREE_CODE (type) != INTEGER_TYPE) | |
1604 dbxout_type (type, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */ | |
1605 else | |
1606 { | |
1607 /* Traditionally, we made sure 'int' was type 1, and builtin types | |
1608 were defined to be sub-ranges of int. Unfortunately, this | |
1609 does not allow us to distinguish true sub-ranges from integer | |
1610 types. So, instead we define integer (non-sub-range) types as | |
1611 sub-ranges of themselves. This matters for Chill. If this isn't | |
1612 a subrange type, then we want to define it in terms of itself. | |
1613 However, in C, this may be an anonymous integer type, and we don't | |
1614 want to emit debug info referring to it. Just calling | |
1615 dbxout_type_index won't work anyways, because the type hasn't been | |
1616 defined yet. We make this work for both cases by checked to see | |
1617 whether this is a defined type, referring to it if it is, and using | |
1618 'int' otherwise. */ | |
1619 if (TYPE_SYMTAB_ADDRESS (type) != 0) | |
1620 dbxout_type_index (type); | |
1621 else | |
1622 dbxout_type_index (integer_type_node); | |
1623 } | |
1624 | |
1625 stabstr_C (';'); | |
1626 if (TYPE_MIN_VALUE (type) != 0 | |
1627 && host_integerp (TYPE_MIN_VALUE (type), 0)) | |
1628 { | |
1629 if (print_int_cst_bounds_in_octal_p (type)) | |
1630 stabstr_O (TYPE_MIN_VALUE (type)); | |
1631 else | |
1632 stabstr_D (tree_low_cst (TYPE_MIN_VALUE (type), 0)); | |
1633 } | |
1634 else | |
1635 stabstr_C ('0'); | |
1636 | |
1637 stabstr_C (';'); | |
1638 if (TYPE_MAX_VALUE (type) != 0 | |
1639 && host_integerp (TYPE_MAX_VALUE (type), 0)) | |
1640 { | |
1641 if (print_int_cst_bounds_in_octal_p (type)) | |
1642 stabstr_O (TYPE_MAX_VALUE (type)); | |
1643 else | |
1644 stabstr_D (tree_low_cst (TYPE_MAX_VALUE (type), 0)); | |
1645 stabstr_C (';'); | |
1646 } | |
1647 else | |
1648 stabstr_S ("-1;"); | |
1649 } | |
1650 | |
1651 | |
1652 /* Output a reference to a type. If the type has not yet been | |
1653 described in the dbx output, output its definition now. | |
1654 For a type already defined, just refer to its definition | |
1655 using the type number. | |
1656 | |
1657 If FULL is nonzero, and the type has been described only with | |
1658 a forward-reference, output the definition now. | |
1659 If FULL is zero in this case, just refer to the forward-reference | |
1660 using the number previously allocated. */ | |
1661 | |
1662 static void | |
1663 dbxout_type (tree type, int full) | |
1664 { | |
1665 tree tem; | |
1666 tree main_variant; | |
1667 static int anonymous_type_number = 0; | |
1668 bool vector_type = false; | |
1669 | |
1670 if (TREE_CODE (type) == VECTOR_TYPE) | |
1671 { | |
1672 /* The frontend feeds us a representation for the vector as a struct | |
1673 containing an array. Pull out the array type. */ | |
1674 type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type))); | |
1675 vector_type = true; | |
1676 } | |
1677 | |
1678 /* If there was an input error and we don't really have a type, | |
1679 avoid crashing and write something that is at least valid | |
1680 by assuming `int'. */ | |
1681 if (type == error_mark_node) | |
1682 type = integer_type_node; | |
1683 else | |
1684 { | |
1685 if (TYPE_NAME (type) | |
1686 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1687 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type))) | |
1688 full = 0; | |
1689 } | |
1690 | |
1691 /* Try to find the "main variant" with the same name. */ | |
1692 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1693 && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
1694 main_variant = TREE_TYPE (TYPE_NAME (type)); | |
1695 else | |
1696 main_variant = TYPE_MAIN_VARIANT (type); | |
1697 | |
1698 /* If we are not using extensions, stabs does not distinguish const and | |
1699 volatile, so there is no need to make them separate types. */ | |
1700 if (!use_gnu_debug_info_extensions) | |
1701 type = main_variant; | |
1702 | |
1703 if (TYPE_SYMTAB_ADDRESS (type) == 0) | |
1704 { | |
1705 /* Type has no dbx number assigned. Assign next available number. */ | |
1706 TYPE_SYMTAB_ADDRESS (type) = next_type_number++; | |
1707 | |
1708 /* Make sure type vector is long enough to record about this type. */ | |
1709 | |
1710 if (next_type_number == typevec_len) | |
1711 { | |
1712 typevec = GGC_RESIZEVEC (struct typeinfo, typevec, typevec_len * 2); | |
1713 memset (typevec + typevec_len, 0, typevec_len * sizeof typevec[0]); | |
1714 typevec_len *= 2; | |
1715 } | |
1716 | |
1717 #ifdef DBX_USE_BINCL | |
1718 emit_pending_bincls_if_required (); | |
1719 typevec[TYPE_SYMTAB_ADDRESS (type)].file_number | |
1720 = current_file->file_number; | |
1721 typevec[TYPE_SYMTAB_ADDRESS (type)].type_number | |
1722 = current_file->next_type_number++; | |
1723 #endif | |
1724 } | |
1725 | |
1726 if (flag_debug_only_used_symbols) | |
1727 { | |
1728 if ((TREE_CODE (type) == RECORD_TYPE | |
1729 || TREE_CODE (type) == UNION_TYPE | |
1730 || TREE_CODE (type) == QUAL_UNION_TYPE | |
1731 || TREE_CODE (type) == ENUMERAL_TYPE) | |
1732 && TYPE_STUB_DECL (type) | |
1733 && DECL_P (TYPE_STUB_DECL (type)) | |
1734 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type))) | |
1735 debug_queue_symbol (TYPE_STUB_DECL (type)); | |
1736 else if (TYPE_NAME (type) | |
1737 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL) | |
1738 debug_queue_symbol (TYPE_NAME (type)); | |
1739 } | |
1740 | |
1741 /* Output the number of this type, to refer to it. */ | |
1742 dbxout_type_index (type); | |
1743 | |
1744 #ifdef DBX_TYPE_DEFINED | |
1745 if (DBX_TYPE_DEFINED (type)) | |
1746 return; | |
1747 #endif | |
1748 | |
1749 /* If this type's definition has been output or is now being output, | |
1750 that is all. */ | |
1751 | |
1752 switch (typevec[TYPE_SYMTAB_ADDRESS (type)].status) | |
1753 { | |
1754 case TYPE_UNSEEN: | |
1755 break; | |
1756 case TYPE_XREF: | |
1757 /* If we have already had a cross reference, | |
1758 and either that's all we want or that's the best we could do, | |
1759 don't repeat the cross reference. | |
1760 Sun dbx crashes if we do. */ | |
1761 if (! full || !COMPLETE_TYPE_P (type) | |
1762 /* No way in DBX fmt to describe a variable size. */ | |
1763 || ! host_integerp (TYPE_SIZE (type), 1)) | |
1764 return; | |
1765 break; | |
1766 case TYPE_DEFINED: | |
1767 return; | |
1768 } | |
1769 | |
1770 #ifdef DBX_NO_XREFS | |
1771 /* For systems where dbx output does not allow the `=xsNAME:' syntax, | |
1772 leave the type-number completely undefined rather than output | |
1773 a cross-reference. If we have already used GNU debug info extensions, | |
1774 then it is OK to output a cross reference. This is necessary to get | |
1775 proper C++ debug output. */ | |
1776 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE | |
1777 || TREE_CODE (type) == QUAL_UNION_TYPE | |
1778 || TREE_CODE (type) == ENUMERAL_TYPE) | |
1779 && ! use_gnu_debug_info_extensions) | |
1780 /* We must use the same test here as we use twice below when deciding | |
1781 whether to emit a cross-reference. */ | |
1782 if ((TYPE_NAME (type) != 0 | |
1783 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1784 && DECL_IGNORED_P (TYPE_NAME (type))) | |
1785 && !full) | |
1786 || !COMPLETE_TYPE_P (type) | |
1787 /* No way in DBX fmt to describe a variable size. */ | |
1788 || ! host_integerp (TYPE_SIZE (type), 1)) | |
1789 { | |
1790 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF; | |
1791 return; | |
1792 } | |
1793 #endif | |
1794 | |
1795 /* Output a definition now. */ | |
1796 stabstr_C ('='); | |
1797 | |
1798 /* Mark it as defined, so that if it is self-referent | |
1799 we will not get into an infinite recursion of definitions. */ | |
1800 | |
1801 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_DEFINED; | |
1802 | |
1803 /* If this type is a variant of some other, hand off. Types with | |
1804 different names are usefully distinguished. We only distinguish | |
1805 cv-qualified types if we're using extensions. */ | |
1806 if (TYPE_READONLY (type) > TYPE_READONLY (main_variant)) | |
1807 { | |
1808 stabstr_C ('k'); | |
1809 dbxout_type (build_type_variant (type, 0, TYPE_VOLATILE (type)), 0); | |
1810 return; | |
1811 } | |
1812 else if (TYPE_VOLATILE (type) > TYPE_VOLATILE (main_variant)) | |
1813 { | |
1814 stabstr_C ('B'); | |
1815 dbxout_type (build_type_variant (type, TYPE_READONLY (type), 0), 0); | |
1816 return; | |
1817 } | |
1818 else if (main_variant != TYPE_MAIN_VARIANT (type)) | |
1819 { | |
1820 if (flag_debug_only_used_symbols) | |
1821 { | |
1822 tree orig_type = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); | |
1823 | |
1824 if ((TREE_CODE (orig_type) == RECORD_TYPE | |
1825 || TREE_CODE (orig_type) == UNION_TYPE | |
1826 || TREE_CODE (orig_type) == QUAL_UNION_TYPE | |
1827 || TREE_CODE (orig_type) == ENUMERAL_TYPE) | |
1828 && TYPE_STUB_DECL (orig_type) | |
1829 && ! DECL_IGNORED_P (TYPE_STUB_DECL (orig_type))) | |
1830 debug_queue_symbol (TYPE_STUB_DECL (orig_type)); | |
1831 } | |
1832 /* 'type' is a typedef; output the type it refers to. */ | |
1833 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type)), 0); | |
1834 return; | |
1835 } | |
1836 /* else continue. */ | |
1837 | |
1838 switch (TREE_CODE (type)) | |
1839 { | |
1840 case VOID_TYPE: | |
1841 case LANG_TYPE: | |
1842 /* For a void type, just define it as itself; i.e., "5=5". | |
1843 This makes us consider it defined | |
1844 without saying what it is. The debugger will make it | |
1845 a void type when the reference is seen, and nothing will | |
1846 ever override that default. */ | |
1847 dbxout_type_index (type); | |
1848 break; | |
1849 | |
1850 case INTEGER_TYPE: | |
1851 if (type == char_type_node && ! TYPE_UNSIGNED (type)) | |
1852 { | |
1853 /* Output the type `char' as a subrange of itself! | |
1854 I don't understand this definition, just copied it | |
1855 from the output of pcc. | |
1856 This used to use `r2' explicitly and we used to | |
1857 take care to make sure that `char' was type number 2. */ | |
1858 stabstr_C ('r'); | |
1859 dbxout_type_index (type); | |
1860 stabstr_S (";0;127;"); | |
1861 } | |
1862 | |
1863 /* If this is a subtype of another integer type, always prefer to | |
1864 write it as a subtype. */ | |
1865 else if (TREE_TYPE (type) != 0 | |
1866 && TREE_CODE (TREE_TYPE (type)) == INTEGER_TYPE) | |
1867 { | |
1868 /* If the size is non-standard, say what it is if we can use | |
1869 GDB extensions. */ | |
1870 | |
1871 if (use_gnu_debug_info_extensions | |
1872 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node)) | |
1873 { | |
1874 stabstr_S ("@s"); | |
1875 stabstr_D (TYPE_PRECISION (type)); | |
1876 stabstr_C (';'); | |
1877 } | |
1878 | |
1879 dbxout_range_type (type); | |
1880 } | |
1881 | |
1882 else | |
1883 { | |
1884 /* If the size is non-standard, say what it is if we can use | |
1885 GDB extensions. */ | |
1886 | |
1887 if (use_gnu_debug_info_extensions | |
1888 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node)) | |
1889 { | |
1890 stabstr_S ("@s"); | |
1891 stabstr_D (TYPE_PRECISION (type)); | |
1892 stabstr_C (';'); | |
1893 } | |
1894 | |
1895 if (print_int_cst_bounds_in_octal_p (type)) | |
1896 { | |
1897 stabstr_C ('r'); | |
1898 | |
1899 /* If this type derives from another type, output type index of | |
1900 parent type. This is particularly important when parent type | |
1901 is an enumerated type, because not generating the parent type | |
1902 index would transform the definition of this enumerated type | |
1903 into a plain unsigned type. */ | |
1904 if (TREE_TYPE (type) != 0) | |
1905 dbxout_type_index (TREE_TYPE (type)); | |
1906 else | |
1907 dbxout_type_index (type); | |
1908 | |
1909 stabstr_C (';'); | |
1910 stabstr_O (TYPE_MIN_VALUE (type)); | |
1911 stabstr_C (';'); | |
1912 stabstr_O (TYPE_MAX_VALUE (type)); | |
1913 stabstr_C (';'); | |
1914 } | |
1915 | |
1916 else | |
1917 /* Output other integer types as subranges of `int'. */ | |
1918 dbxout_range_type (type); | |
1919 } | |
1920 | |
1921 break; | |
1922 | |
1923 case REAL_TYPE: | |
1924 case FIXED_POINT_TYPE: | |
1925 /* This used to say `r1' and we used to take care | |
1926 to make sure that `int' was type number 1. */ | |
1927 stabstr_C ('r'); | |
1928 dbxout_type_index (integer_type_node); | |
1929 stabstr_C (';'); | |
1930 stabstr_D (int_size_in_bytes (type)); | |
1931 stabstr_S (";0;"); | |
1932 break; | |
1933 | |
1934 case BOOLEAN_TYPE: | |
1935 if (use_gnu_debug_info_extensions) | |
1936 { | |
1937 stabstr_S ("@s"); | |
1938 stabstr_D (BITS_PER_UNIT * int_size_in_bytes (type)); | |
1939 stabstr_S (";-16;"); | |
1940 } | |
1941 else /* Define as enumeral type (False, True) */ | |
1942 stabstr_S ("eFalse:0,True:1,;"); | |
1943 break; | |
1944 | |
1945 case COMPLEX_TYPE: | |
1946 /* Differs from the REAL_TYPE by its new data type number. | |
1947 R3 is NF_COMPLEX. We don't try to use any of the other NF_* | |
1948 codes since gdb doesn't care anyway. */ | |
1949 | |
1950 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) | |
1951 { | |
1952 stabstr_S ("R3;"); | |
1953 stabstr_D (2 * int_size_in_bytes (TREE_TYPE (type))); | |
1954 stabstr_S (";0;"); | |
1955 } | |
1956 else | |
1957 { | |
1958 /* Output a complex integer type as a structure, | |
1959 pending some other way to do it. */ | |
1960 stabstr_C ('s'); | |
1961 stabstr_D (int_size_in_bytes (type)); | |
1962 | |
1963 stabstr_S ("real:"); | |
1964 dbxout_type (TREE_TYPE (type), 0); | |
1965 stabstr_S (",0,"); | |
1966 stabstr_D (TYPE_PRECISION (TREE_TYPE (type))); | |
1967 | |
1968 stabstr_S (";imag:"); | |
1969 dbxout_type (TREE_TYPE (type), 0); | |
1970 stabstr_C (','); | |
1971 stabstr_D (TYPE_PRECISION (TREE_TYPE (type))); | |
1972 stabstr_C (','); | |
1973 stabstr_D (TYPE_PRECISION (TREE_TYPE (type))); | |
1974 stabstr_S (";;"); | |
1975 } | |
1976 break; | |
1977 | |
1978 case ARRAY_TYPE: | |
1979 /* Make arrays of packed bits look like bitstrings for chill. */ | |
1980 if (TYPE_PACKED (type) && use_gnu_debug_info_extensions) | |
1981 { | |
1982 stabstr_S ("@s"); | |
1983 stabstr_D (BITS_PER_UNIT * int_size_in_bytes (type)); | |
1984 stabstr_S (";@S;S"); | |
1985 dbxout_type (TYPE_DOMAIN (type), 0); | |
1986 break; | |
1987 } | |
1988 | |
1989 if (use_gnu_debug_info_extensions && vector_type) | |
1990 stabstr_S ("@V;"); | |
1991 | |
1992 /* Output "a" followed by a range type definition | |
1993 for the index type of the array | |
1994 followed by a reference to the target-type. | |
1995 ar1;0;N;M for a C array of type M and size N+1. */ | |
1996 /* Check if a character string type, which in Chill is | |
1997 different from an array of characters. */ | |
1998 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions) | |
1999 { | |
2000 stabstr_S ("@S;"); | |
2001 } | |
2002 tem = TYPE_DOMAIN (type); | |
2003 if (tem == NULL) | |
2004 { | |
2005 stabstr_S ("ar"); | |
2006 dbxout_type_index (integer_type_node); | |
2007 stabstr_S (";0;-1;"); | |
2008 } | |
2009 else | |
2010 { | |
2011 stabstr_C ('a'); | |
2012 dbxout_range_type (tem); | |
2013 } | |
2014 | |
2015 dbxout_type (TREE_TYPE (type), 0); | |
2016 break; | |
2017 | |
2018 case RECORD_TYPE: | |
2019 case UNION_TYPE: | |
2020 case QUAL_UNION_TYPE: | |
2021 { | |
2022 tree binfo = TYPE_BINFO (type); | |
2023 | |
2024 /* Output a structure type. We must use the same test here as we | |
2025 use in the DBX_NO_XREFS case above. */ | |
2026 if ((TYPE_NAME (type) != 0 | |
2027 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
2028 && DECL_IGNORED_P (TYPE_NAME (type))) | |
2029 && !full) | |
2030 || !COMPLETE_TYPE_P (type) | |
2031 /* No way in DBX fmt to describe a variable size. */ | |
2032 || ! host_integerp (TYPE_SIZE (type), 1)) | |
2033 { | |
2034 /* If the type is just a cross reference, output one | |
2035 and mark the type as partially described. | |
2036 If it later becomes defined, we will output | |
2037 its real definition. | |
2038 If the type has a name, don't nest its definition within | |
2039 another type's definition; instead, output an xref | |
2040 and let the definition come when the name is defined. */ | |
2041 stabstr_S ((TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu"); | |
2042 if (TYPE_NAME (type) != 0 | |
2043 /* The C frontend creates for anonymous variable length | |
2044 records/unions TYPE_NAME with DECL_NAME NULL. */ | |
2045 && (TREE_CODE (TYPE_NAME (type)) != TYPE_DECL | |
2046 || DECL_NAME (TYPE_NAME (type)))) | |
2047 dbxout_type_name (type); | |
2048 else | |
2049 { | |
2050 stabstr_S ("$$"); | |
2051 stabstr_D (anonymous_type_number++); | |
2052 } | |
2053 | |
2054 stabstr_C (':'); | |
2055 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF; | |
2056 break; | |
2057 } | |
2058 | |
2059 /* Identify record or union, and print its size. */ | |
2060 stabstr_C ((TREE_CODE (type) == RECORD_TYPE) ? 's' : 'u'); | |
2061 stabstr_D (int_size_in_bytes (type)); | |
2062 | |
2063 if (binfo) | |
2064 { | |
2065 int i; | |
2066 tree child; | |
2067 VEC(tree,gc) *accesses = BINFO_BASE_ACCESSES (binfo); | |
2068 | |
2069 if (use_gnu_debug_info_extensions) | |
2070 { | |
2071 if (BINFO_N_BASE_BINFOS (binfo)) | |
2072 { | |
2073 stabstr_C ('!'); | |
2074 stabstr_U (BINFO_N_BASE_BINFOS (binfo)); | |
2075 stabstr_C (','); | |
2076 } | |
2077 } | |
2078 for (i = 0; BINFO_BASE_ITERATE (binfo, i, child); i++) | |
2079 { | |
2080 tree access = (accesses ? VEC_index (tree, accesses, i) | |
2081 : access_public_node); | |
2082 | |
2083 if (use_gnu_debug_info_extensions) | |
2084 { | |
2085 stabstr_C (BINFO_VIRTUAL_P (child) ? '1' : '0'); | |
2086 stabstr_C (access == access_public_node ? '2' : | |
2087 access == access_protected_node | |
2088 ? '1' :'0'); | |
2089 if (BINFO_VIRTUAL_P (child) | |
2090 && (strcmp (lang_hooks.name, "GNU C++") == 0 | |
2091 || strcmp (lang_hooks.name, "GNU Objective-C++") == 0)) | |
2092 /* For a virtual base, print the (negative) | |
2093 offset within the vtable where we must look | |
2094 to find the necessary adjustment. */ | |
2095 stabstr_D | |
2096 (tree_low_cst (BINFO_VPTR_FIELD (child), 0) | |
2097 * BITS_PER_UNIT); | |
2098 else | |
2099 stabstr_D (tree_low_cst (BINFO_OFFSET (child), 0) | |
2100 * BITS_PER_UNIT); | |
2101 stabstr_C (','); | |
2102 dbxout_type (BINFO_TYPE (child), 0); | |
2103 stabstr_C (';'); | |
2104 } | |
2105 else | |
2106 { | |
2107 /* Print out the base class information with | |
2108 fields which have the same names at the types | |
2109 they hold. */ | |
2110 dbxout_type_name (BINFO_TYPE (child)); | |
2111 stabstr_C (':'); | |
2112 dbxout_type (BINFO_TYPE (child), full); | |
2113 stabstr_C (','); | |
2114 stabstr_D (tree_low_cst (BINFO_OFFSET (child), 0) | |
2115 * BITS_PER_UNIT); | |
2116 stabstr_C (','); | |
2117 stabstr_D | |
2118 (tree_low_cst (TYPE_SIZE (BINFO_TYPE (child)), 0) | |
2119 * BITS_PER_UNIT); | |
2120 stabstr_C (';'); | |
2121 } | |
2122 } | |
2123 } | |
2124 } | |
2125 | |
2126 /* Write out the field declarations. */ | |
2127 dbxout_type_fields (type); | |
2128 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE) | |
2129 { | |
2130 dbxout_type_methods (type); | |
2131 } | |
2132 | |
2133 stabstr_C (';'); | |
2134 | |
2135 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE | |
2136 /* Avoid the ~ if we don't really need it--it confuses dbx. */ | |
2137 && TYPE_VFIELD (type)) | |
2138 { | |
2139 | |
2140 /* We need to write out info about what field this class | |
2141 uses as its "main" vtable pointer field, because if this | |
2142 field is inherited from a base class, GDB cannot necessarily | |
2143 figure out which field it's using in time. */ | |
2144 stabstr_S ("~%"); | |
2145 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0); | |
2146 stabstr_C (';'); | |
2147 } | |
2148 break; | |
2149 | |
2150 case ENUMERAL_TYPE: | |
2151 /* We must use the same test here as we use in the DBX_NO_XREFS case | |
2152 above. We simplify it a bit since an enum will never have a variable | |
2153 size. */ | |
2154 if ((TYPE_NAME (type) != 0 | |
2155 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
2156 && DECL_IGNORED_P (TYPE_NAME (type))) | |
2157 && !full) | |
2158 || !COMPLETE_TYPE_P (type)) | |
2159 { | |
2160 stabstr_S ("xe"); | |
2161 dbxout_type_name (type); | |
2162 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF; | |
2163 stabstr_C (':'); | |
2164 return; | |
2165 } | |
2166 if (use_gnu_debug_info_extensions | |
2167 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node)) | |
2168 { | |
2169 stabstr_S ("@s"); | |
2170 stabstr_D (TYPE_PRECISION (type)); | |
2171 stabstr_C (';'); | |
2172 } | |
2173 | |
2174 stabstr_C ('e'); | |
2175 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem)) | |
2176 { | |
2177 tree value = TREE_VALUE (tem); | |
2178 | |
2179 stabstr_I (TREE_PURPOSE (tem)); | |
2180 stabstr_C (':'); | |
2181 | |
2182 if (TREE_CODE (value) == CONST_DECL) | |
2183 value = DECL_INITIAL (value); | |
2184 | |
2185 if (TREE_INT_CST_HIGH (value) == 0) | |
2186 stabstr_D (TREE_INT_CST_LOW (value)); | |
2187 else if (TREE_INT_CST_HIGH (value) == -1 | |
2188 && (HOST_WIDE_INT) TREE_INT_CST_LOW (value) < 0) | |
2189 stabstr_D (TREE_INT_CST_LOW (value)); | |
2190 else | |
2191 stabstr_O (value); | |
2192 | |
2193 stabstr_C (','); | |
2194 if (TREE_CHAIN (tem) != 0) | |
2195 CONTIN; | |
2196 } | |
2197 | |
2198 stabstr_C (';'); | |
2199 break; | |
2200 | |
2201 case POINTER_TYPE: | |
2202 stabstr_C ('*'); | |
2203 dbxout_type (TREE_TYPE (type), 0); | |
2204 break; | |
2205 | |
2206 case METHOD_TYPE: | |
2207 if (use_gnu_debug_info_extensions) | |
2208 { | |
2209 stabstr_C ('#'); | |
2210 | |
2211 /* Write the argument types out longhand. */ | |
2212 dbxout_type (TYPE_METHOD_BASETYPE (type), 0); | |
2213 stabstr_C (','); | |
2214 dbxout_type (TREE_TYPE (type), 0); | |
2215 dbxout_args (TYPE_ARG_TYPES (type)); | |
2216 stabstr_C (';'); | |
2217 } | |
2218 else | |
2219 /* Treat it as a function type. */ | |
2220 dbxout_type (TREE_TYPE (type), 0); | |
2221 break; | |
2222 | |
2223 case OFFSET_TYPE: | |
2224 if (use_gnu_debug_info_extensions) | |
2225 { | |
2226 stabstr_C ('@'); | |
2227 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0); | |
2228 stabstr_C (','); | |
2229 dbxout_type (TREE_TYPE (type), 0); | |
2230 } | |
2231 else | |
2232 /* Should print as an int, because it is really just an offset. */ | |
2233 dbxout_type (integer_type_node, 0); | |
2234 break; | |
2235 | |
2236 case REFERENCE_TYPE: | |
2237 if (use_gnu_debug_info_extensions) | |
2238 { | |
2239 stabstr_C ('&'); | |
2240 } | |
2241 else | |
2242 stabstr_C ('*'); | |
2243 dbxout_type (TREE_TYPE (type), 0); | |
2244 break; | |
2245 | |
2246 case FUNCTION_TYPE: | |
2247 stabstr_C ('f'); | |
2248 dbxout_type (TREE_TYPE (type), 0); | |
2249 break; | |
2250 | |
2251 default: | |
2252 gcc_unreachable (); | |
2253 } | |
2254 } | |
2255 | |
2256 /* Return nonzero if the given type represents an integer whose bounds | |
2257 should be printed in octal format. */ | |
2258 | |
2259 static bool | |
2260 print_int_cst_bounds_in_octal_p (tree type) | |
2261 { | |
2262 /* If we can use GDB extensions and the size is wider than a long | |
2263 (the size used by GDB to read them) or we may have trouble writing | |
2264 the bounds the usual way, write them in octal. Note the test is for | |
2265 the *target's* size of "long", not that of the host. The host test | |
2266 is just to make sure we can write it out in case the host wide int | |
2267 is narrower than the target "long". | |
2268 | |
2269 For unsigned types, we use octal if they are the same size or larger. | |
2270 This is because we print the bounds as signed decimal, and hence they | |
2271 can't span same size unsigned types. */ | |
2272 | |
2273 if (use_gnu_debug_info_extensions | |
2274 && TYPE_MIN_VALUE (type) != 0 | |
2275 && TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST | |
2276 && TYPE_MAX_VALUE (type) != 0 | |
2277 && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST | |
2278 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node) | |
2279 || ((TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)) | |
2280 && TYPE_UNSIGNED (type)) | |
2281 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT | |
2282 || (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT | |
2283 && TYPE_UNSIGNED (type)))) | |
2284 return TRUE; | |
2285 else | |
2286 return FALSE; | |
2287 } | |
2288 | |
2289 /* Output the name of type TYPE, with no punctuation. | |
2290 Such names can be set up either by typedef declarations | |
2291 or by struct, enum and union tags. */ | |
2292 | |
2293 static void | |
2294 dbxout_type_name (tree type) | |
2295 { | |
2296 tree t = TYPE_NAME (type); | |
2297 | |
2298 gcc_assert (t); | |
2299 switch (TREE_CODE (t)) | |
2300 { | |
2301 case IDENTIFIER_NODE: | |
2302 break; | |
2303 case TYPE_DECL: | |
2304 t = DECL_NAME (t); | |
2305 break; | |
2306 default: | |
2307 gcc_unreachable (); | |
2308 } | |
2309 | |
2310 stabstr_I (t); | |
2311 } | |
2312 | |
2313 /* Output leading leading struct or class names needed for qualifying | |
2314 type whose scope is limited to a struct or class. */ | |
2315 | |
2316 static void | |
2317 dbxout_class_name_qualifiers (tree decl) | |
2318 { | |
2319 tree context = decl_type_context (decl); | |
2320 | |
2321 if (context != NULL_TREE | |
2322 && TREE_CODE(context) == RECORD_TYPE | |
2323 && TYPE_NAME (context) != 0 | |
2324 && (TREE_CODE (TYPE_NAME (context)) == IDENTIFIER_NODE | |
2325 || (DECL_NAME (TYPE_NAME (context)) != 0))) | |
2326 { | |
2327 tree name = TYPE_NAME (context); | |
2328 | |
2329 if (TREE_CODE (name) == TYPE_DECL) | |
2330 { | |
2331 dbxout_class_name_qualifiers (name); | |
2332 name = DECL_NAME (name); | |
2333 } | |
2334 stabstr_I (name); | |
2335 stabstr_S ("::"); | |
2336 } | |
2337 } | |
2338 | |
2339 /* This is a specialized subset of expand_expr for use by dbxout_symbol in | |
2340 evaluating DECL_VALUE_EXPR. In particular, we stop if we find decls that | |
2341 haven't been expanded, or if the expression is getting so complex we won't | |
2342 be able to represent it in stabs anyway. Returns NULL on failure. */ | |
2343 | |
2344 static rtx | |
2345 dbxout_expand_expr (tree expr) | |
2346 { | |
2347 switch (TREE_CODE (expr)) | |
2348 { | |
2349 case VAR_DECL: | |
2350 /* We can't handle emulated tls variables, because the address is an | |
2351 offset to the return value of __emutls_get_address, and there is no | |
2352 way to express that in stabs. Also, there are name mangling issues | |
2353 here. We end up with references to undefined symbols if we don't | |
2354 disable debug info for these variables. */ | |
2355 if (!targetm.have_tls && DECL_THREAD_LOCAL_P (expr)) | |
2356 return NULL; | |
2357 /* FALLTHRU */ | |
2358 | |
2359 case PARM_DECL: | |
2360 if (DECL_HAS_VALUE_EXPR_P (expr)) | |
2361 return dbxout_expand_expr (DECL_VALUE_EXPR (expr)); | |
2362 /* FALLTHRU */ | |
2363 | |
2364 case CONST_DECL: | |
2365 case RESULT_DECL: | |
2366 return DECL_RTL_IF_SET (expr); | |
2367 | |
2368 case INTEGER_CST: | |
2369 return expand_expr (expr, NULL_RTX, VOIDmode, EXPAND_INITIALIZER); | |
2370 | |
2371 case COMPONENT_REF: | |
2372 case ARRAY_REF: | |
2373 case ARRAY_RANGE_REF: | |
2374 case BIT_FIELD_REF: | |
2375 { | |
2376 enum machine_mode mode; | |
2377 HOST_WIDE_INT bitsize, bitpos; | |
2378 tree offset, tem; | |
2379 int volatilep = 0, unsignedp = 0; | |
2380 rtx x; | |
2381 | |
2382 tem = get_inner_reference (expr, &bitsize, &bitpos, &offset, | |
2383 &mode, &unsignedp, &volatilep, true); | |
2384 | |
2385 x = dbxout_expand_expr (tem); | |
2386 if (x == NULL || !MEM_P (x)) | |
2387 return NULL; | |
2388 if (offset != NULL) | |
2389 { | |
2390 if (!host_integerp (offset, 0)) | |
2391 return NULL; | |
2392 x = adjust_address_nv (x, mode, tree_low_cst (offset, 0)); | |
2393 } | |
2394 if (bitpos != 0) | |
2395 x = adjust_address_nv (x, mode, bitpos / BITS_PER_UNIT); | |
2396 | |
2397 return x; | |
2398 } | |
2399 | |
2400 default: | |
2401 return NULL; | |
2402 } | |
2403 } | |
2404 | |
2405 /* Helper function for output_used_types. Queue one entry from the | |
2406 used types hash to be output. */ | |
2407 | |
2408 static int | |
2409 output_used_types_helper (void **slot, void *data) | |
2410 { | |
2411 tree type = (tree) *slot; | |
2412 VEC(tree, heap) **types_p = (VEC(tree, heap) **) data; | |
2413 | |
2414 if ((TREE_CODE (type) == RECORD_TYPE | |
2415 || TREE_CODE (type) == UNION_TYPE | |
2416 || TREE_CODE (type) == QUAL_UNION_TYPE | |
2417 || TREE_CODE (type) == ENUMERAL_TYPE) | |
2418 && TYPE_STUB_DECL (type) | |
2419 && DECL_P (TYPE_STUB_DECL (type)) | |
2420 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type))) | |
2421 VEC_quick_push (tree, *types_p, TYPE_STUB_DECL (type)); | |
2422 else if (TYPE_NAME (type) | |
2423 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL) | |
2424 VEC_quick_push (tree, *types_p, TYPE_NAME (type)); | |
2425 | |
2426 return 1; | |
2427 } | |
2428 | |
2429 /* This is a qsort callback which sorts types and declarations into a | |
2430 predictable order (types, then declarations, sorted by UID | |
2431 within). */ | |
2432 | |
2433 static int | |
2434 output_types_sort (const void *pa, const void *pb) | |
2435 { | |
2436 const tree lhs = *((const tree *)pa); | |
2437 const tree rhs = *((const tree *)pb); | |
2438 | |
2439 if (TYPE_P (lhs)) | |
2440 { | |
2441 if (TYPE_P (rhs)) | |
2442 return TYPE_UID (lhs) - TYPE_UID (rhs); | |
2443 else | |
2444 return 1; | |
2445 } | |
2446 else | |
2447 { | |
2448 if (TYPE_P (rhs)) | |
2449 return -1; | |
2450 else | |
2451 return DECL_UID (lhs) - DECL_UID (rhs); | |
2452 } | |
2453 } | |
2454 | |
2455 | |
2456 /* Force all types used by this function to be output in debug | |
2457 information. */ | |
2458 | |
2459 static void | |
2460 output_used_types (void) | |
2461 { | |
2462 if (cfun && cfun->used_types_hash) | |
2463 { | |
2464 VEC(tree, heap) *types; | |
2465 int i; | |
2466 tree type; | |
2467 | |
2468 types = VEC_alloc (tree, heap, htab_elements (cfun->used_types_hash)); | |
2469 htab_traverse (cfun->used_types_hash, output_used_types_helper, &types); | |
2470 | |
2471 /* Sort by UID to prevent dependence on hash table ordering. */ | |
2472 qsort (VEC_address (tree, types), VEC_length (tree, types), | |
2473 sizeof (tree), output_types_sort); | |
2474 | |
2475 for (i = 0; VEC_iterate (tree, types, i, type); i++) | |
2476 debug_queue_symbol (type); | |
2477 | |
2478 VEC_free (tree, heap, types); | |
2479 } | |
2480 } | |
2481 | |
2482 /* Output a .stabs for the symbol defined by DECL, | |
2483 which must be a ..._DECL node in the normal namespace. | |
2484 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL. | |
2485 LOCAL is nonzero if the scope is less than the entire file. | |
2486 Return 1 if a stabs might have been emitted. */ | |
2487 | |
2488 int | |
2489 dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) | |
2490 { | |
2491 tree type = TREE_TYPE (decl); | |
2492 tree context = NULL_TREE; | |
2493 int result = 0; | |
2494 rtx decl_rtl; | |
2495 | |
2496 /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */ | |
2497 ++debug_nesting; | |
2498 | |
2499 /* Ignore nameless syms, but don't ignore type tags. */ | |
2500 | |
2501 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL) | |
2502 || DECL_IGNORED_P (decl)) | |
2503 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2504 | |
2505 /* If we are to generate only the symbols actually used then such | |
2506 symbol nodes are flagged with TREE_USED. Ignore any that | |
2507 aren't flagged as TREE_USED. */ | |
2508 | |
2509 if (flag_debug_only_used_symbols | |
2510 && (!TREE_USED (decl) | |
2511 && (TREE_CODE (decl) != VAR_DECL || !DECL_INITIAL (decl)))) | |
2512 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2513 | |
2514 /* If dbxout_init has not yet run, queue this symbol for later. */ | |
2515 if (!typevec) | |
2516 { | |
2517 preinit_symbols = tree_cons (0, decl, preinit_symbols); | |
2518 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2519 } | |
2520 | |
2521 if (flag_debug_only_used_symbols) | |
2522 { | |
2523 tree t; | |
2524 | |
2525 /* We now have a used symbol. We need to generate the info for | |
2526 the symbol's type in addition to the symbol itself. These | |
2527 type symbols are queued to be generated after were done with | |
2528 the symbol itself (otherwise they would fight over the | |
2529 stabstr obstack). | |
2530 | |
2531 Note, because the TREE_TYPE(type) might be something like a | |
2532 pointer to a named type we need to look for the first name | |
2533 we see following the TREE_TYPE chain. */ | |
2534 | |
2535 t = type; | |
2536 while (POINTER_TYPE_P (t)) | |
2537 t = TREE_TYPE (t); | |
2538 | |
2539 /* RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, and ENUMERAL_TYPE | |
2540 need special treatment. The TYPE_STUB_DECL field in these | |
2541 types generally represents the tag name type we want to | |
2542 output. In addition there could be a typedef type with | |
2543 a different name. In that case we also want to output | |
2544 that. */ | |
2545 | |
2546 if (TREE_CODE (t) == RECORD_TYPE | |
2547 || TREE_CODE (t) == UNION_TYPE | |
2548 || TREE_CODE (t) == QUAL_UNION_TYPE | |
2549 || TREE_CODE (t) == ENUMERAL_TYPE) | |
2550 { | |
2551 if (TYPE_STUB_DECL (t) | |
2552 && TYPE_STUB_DECL (t) != decl | |
2553 && DECL_P (TYPE_STUB_DECL (t)) | |
2554 && ! DECL_IGNORED_P (TYPE_STUB_DECL (t))) | |
2555 { | |
2556 debug_queue_symbol (TYPE_STUB_DECL (t)); | |
2557 if (TYPE_NAME (t) | |
2558 && TYPE_NAME (t) != TYPE_STUB_DECL (t) | |
2559 && TYPE_NAME (t) != decl | |
2560 && DECL_P (TYPE_NAME (t))) | |
2561 debug_queue_symbol (TYPE_NAME (t)); | |
2562 } | |
2563 } | |
2564 else if (TYPE_NAME (t) | |
2565 && TYPE_NAME (t) != decl | |
2566 && DECL_P (TYPE_NAME (t))) | |
2567 debug_queue_symbol (TYPE_NAME (t)); | |
2568 } | |
2569 | |
2570 emit_pending_bincls_if_required (); | |
2571 | |
2572 switch (TREE_CODE (decl)) | |
2573 { | |
2574 case CONST_DECL: | |
2575 /* Enum values are defined by defining the enum type. */ | |
2576 break; | |
2577 | |
2578 case FUNCTION_DECL: | |
2579 decl_rtl = DECL_RTL_IF_SET (decl); | |
2580 if (!decl_rtl) | |
2581 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2582 if (DECL_EXTERNAL (decl)) | |
2583 break; | |
2584 /* Don't mention a nested function under its parent. */ | |
2585 context = decl_function_context (decl); | |
2586 if (context == current_function_decl) | |
2587 break; | |
2588 /* Don't mention an inline instance of a nested function. */ | |
2589 if (context && DECL_FROM_INLINE (decl)) | |
2590 break; | |
2591 if (!MEM_P (decl_rtl) | |
2592 || GET_CODE (XEXP (decl_rtl, 0)) != SYMBOL_REF) | |
2593 break; | |
2594 | |
2595 if (flag_debug_only_used_symbols) | |
2596 output_used_types (); | |
2597 | |
2598 dbxout_begin_complex_stabs (); | |
2599 stabstr_I (DECL_ASSEMBLER_NAME (decl)); | |
2600 stabstr_S (TREE_PUBLIC (decl) ? ":F" : ":f"); | |
2601 result = 1; | |
2602 | |
2603 if (TREE_TYPE (type)) | |
2604 dbxout_type (TREE_TYPE (type), 0); | |
2605 else | |
2606 dbxout_type (void_type_node, 0); | |
2607 | |
2608 /* For a nested function, when that function is compiled, | |
2609 mention the containing function name | |
2610 as well as (since dbx wants it) our own assembler-name. */ | |
2611 if (context != 0) | |
2612 { | |
2613 stabstr_C (','); | |
2614 stabstr_I (DECL_ASSEMBLER_NAME (decl)); | |
2615 stabstr_C (','); | |
2616 stabstr_I (DECL_NAME (context)); | |
2617 } | |
2618 | |
2619 dbxout_finish_complex_stabs (decl, N_FUN, XEXP (decl_rtl, 0), 0, 0); | |
2620 break; | |
2621 | |
2622 case TYPE_DECL: | |
2623 /* Don't output the same typedef twice. | |
2624 And don't output what language-specific stuff doesn't want output. */ | |
2625 if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl)) | |
2626 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2627 | |
2628 /* Don't output typedefs for types with magic type numbers (XCOFF). */ | |
2629 #ifdef DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER | |
2630 { | |
2631 int fundamental_type_number = | |
2632 DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER (decl); | |
2633 | |
2634 if (fundamental_type_number != 0) | |
2635 { | |
2636 TREE_ASM_WRITTEN (decl) = 1; | |
2637 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl)) = fundamental_type_number; | |
2638 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2639 } | |
2640 } | |
2641 #endif | |
2642 FORCE_TEXT; | |
2643 result = 1; | |
2644 { | |
2645 int tag_needed = 1; | |
2646 int did_output = 0; | |
2647 | |
2648 if (DECL_NAME (decl)) | |
2649 { | |
2650 /* Nonzero means we must output a tag as well as a typedef. */ | |
2651 tag_needed = 0; | |
2652 | |
2653 /* Handle the case of a C++ structure or union | |
2654 where the TYPE_NAME is a TYPE_DECL | |
2655 which gives both a typedef name and a tag. */ | |
2656 /* dbx requires the tag first and the typedef second. */ | |
2657 if ((TREE_CODE (type) == RECORD_TYPE | |
2658 || TREE_CODE (type) == UNION_TYPE | |
2659 || TREE_CODE (type) == QUAL_UNION_TYPE) | |
2660 && TYPE_NAME (type) == decl | |
2661 && !use_gnu_debug_info_extensions | |
2662 && !TREE_ASM_WRITTEN (TYPE_NAME (type)) | |
2663 /* Distinguish the implicit typedefs of C++ | |
2664 from explicit ones that might be found in C. */ | |
2665 && DECL_ARTIFICIAL (decl) | |
2666 /* Do not generate a tag for incomplete records. */ | |
2667 && COMPLETE_TYPE_P (type) | |
2668 /* Do not generate a tag for records of variable size, | |
2669 since this type can not be properly described in the | |
2670 DBX format, and it confuses some tools such as objdump. */ | |
2671 && host_integerp (TYPE_SIZE (type), 1)) | |
2672 { | |
2673 tree name = TYPE_NAME (type); | |
2674 if (TREE_CODE (name) == TYPE_DECL) | |
2675 name = DECL_NAME (name); | |
2676 | |
2677 dbxout_begin_complex_stabs (); | |
2678 stabstr_I (name); | |
2679 stabstr_S (":T"); | |
2680 dbxout_type (type, 1); | |
2681 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE, | |
2682 0, 0, 0); | |
2683 } | |
2684 | |
2685 dbxout_begin_complex_stabs (); | |
2686 | |
2687 /* Output leading class/struct qualifiers. */ | |
2688 if (use_gnu_debug_info_extensions) | |
2689 dbxout_class_name_qualifiers (decl); | |
2690 | |
2691 /* Output typedef name. */ | |
2692 stabstr_I (DECL_NAME (decl)); | |
2693 stabstr_C (':'); | |
2694 | |
2695 /* Short cut way to output a tag also. */ | |
2696 if ((TREE_CODE (type) == RECORD_TYPE | |
2697 || TREE_CODE (type) == UNION_TYPE | |
2698 || TREE_CODE (type) == QUAL_UNION_TYPE) | |
2699 && TYPE_NAME (type) == decl | |
2700 /* Distinguish the implicit typedefs of C++ | |
2701 from explicit ones that might be found in C. */ | |
2702 && DECL_ARTIFICIAL (decl)) | |
2703 { | |
2704 if (use_gnu_debug_info_extensions) | |
2705 { | |
2706 stabstr_C ('T'); | |
2707 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1; | |
2708 } | |
2709 } | |
2710 | |
2711 stabstr_C ('t'); | |
2712 dbxout_type (type, 1); | |
2713 dbxout_finish_complex_stabs (decl, DBX_TYPE_DECL_STABS_CODE, | |
2714 0, 0, 0); | |
2715 did_output = 1; | |
2716 } | |
2717 | |
2718 /* Don't output a tag if this is an incomplete type. This prevents | |
2719 the sun4 Sun OS 4.x dbx from crashing. */ | |
2720 | |
2721 if (tag_needed && TYPE_NAME (type) != 0 | |
2722 && (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE | |
2723 || (DECL_NAME (TYPE_NAME (type)) != 0)) | |
2724 && COMPLETE_TYPE_P (type) | |
2725 && !TREE_ASM_WRITTEN (TYPE_NAME (type))) | |
2726 { | |
2727 /* For a TYPE_DECL with no name, but the type has a name, | |
2728 output a tag. | |
2729 This is what represents `struct foo' with no typedef. */ | |
2730 /* In C++, the name of a type is the corresponding typedef. | |
2731 In C, it is an IDENTIFIER_NODE. */ | |
2732 tree name = TYPE_NAME (type); | |
2733 if (TREE_CODE (name) == TYPE_DECL) | |
2734 name = DECL_NAME (name); | |
2735 | |
2736 dbxout_begin_complex_stabs (); | |
2737 stabstr_I (name); | |
2738 stabstr_S (":T"); | |
2739 dbxout_type (type, 1); | |
2740 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE, 0, 0, 0); | |
2741 did_output = 1; | |
2742 } | |
2743 | |
2744 /* If an enum type has no name, it cannot be referred to, but | |
2745 we must output it anyway, to record the enumeration | |
2746 constants. */ | |
2747 | |
2748 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE) | |
2749 { | |
2750 dbxout_begin_complex_stabs (); | |
2751 /* Some debuggers fail when given NULL names, so give this a | |
2752 harmless name of " " (Why not "(anon)"?). */ | |
2753 stabstr_S (" :T"); | |
2754 dbxout_type (type, 1); | |
2755 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE, 0, 0, 0); | |
2756 } | |
2757 | |
2758 /* Prevent duplicate output of a typedef. */ | |
2759 TREE_ASM_WRITTEN (decl) = 1; | |
2760 break; | |
2761 } | |
2762 | |
2763 case PARM_DECL: | |
2764 /* Parm decls go in their own separate chains | |
2765 and are output by dbxout_reg_parms and dbxout_parms. */ | |
2766 gcc_unreachable (); | |
2767 | |
2768 case RESULT_DECL: | |
2769 case VAR_DECL: | |
2770 /* Don't mention a variable that is external. | |
2771 Let the file that defines it describe it. */ | |
2772 if (DECL_EXTERNAL (decl)) | |
2773 break; | |
2774 | |
2775 /* If the variable is really a constant | |
2776 and not written in memory, inform the debugger. | |
2777 | |
2778 ??? Why do we skip emitting the type and location in this case? */ | |
2779 if (TREE_STATIC (decl) && TREE_READONLY (decl) | |
2780 && DECL_INITIAL (decl) != 0 | |
2781 && host_integerp (DECL_INITIAL (decl), 0) | |
2782 && ! TREE_ASM_WRITTEN (decl) | |
2783 && (DECL_CONTEXT (decl) == NULL_TREE | |
2784 || TREE_CODE (DECL_CONTEXT (decl)) == BLOCK | |
2785 || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL) | |
2786 && TREE_PUBLIC (decl) == 0) | |
2787 { | |
2788 /* The sun4 assembler does not grok this. */ | |
2789 | |
2790 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE | |
2791 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
2792 { | |
2793 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl)); | |
2794 | |
2795 dbxout_begin_complex_stabs (); | |
2796 dbxout_symbol_name (decl, NULL, 'c'); | |
2797 stabstr_S ("=i"); | |
2798 stabstr_D (ival); | |
2799 dbxout_finish_complex_stabs (0, N_LSYM, 0, 0, 0); | |
2800 DBXOUT_DECR_NESTING; | |
2801 return 1; | |
2802 } | |
2803 else | |
2804 break; | |
2805 } | |
2806 /* else it is something we handle like a normal variable. */ | |
2807 | |
2808 decl_rtl = dbxout_expand_expr (decl); | |
2809 if (!decl_rtl) | |
2810 DBXOUT_DECR_NESTING_AND_RETURN (0); | |
2811 | |
2812 decl_rtl = eliminate_regs (decl_rtl, 0, NULL_RTX); | |
2813 #ifdef LEAF_REG_REMAP | |
2814 if (current_function_uses_only_leaf_regs) | |
2815 leaf_renumber_regs_insn (decl_rtl); | |
2816 #endif | |
2817 | |
2818 result = dbxout_symbol_location (decl, type, 0, decl_rtl); | |
2819 break; | |
2820 | |
2821 default: | |
2822 break; | |
2823 } | |
2824 DBXOUT_DECR_NESTING; | |
2825 return result; | |
2826 } | |
2827 | |
2828 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL. | |
2829 Add SUFFIX to its name, if SUFFIX is not 0. | |
2830 Describe the variable as residing in HOME | |
2831 (usually HOME is DECL_RTL (DECL), but not always). | |
2832 Returns 1 if the stab was really emitted. */ | |
2833 | |
2834 static int | |
2835 dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) | |
2836 { | |
2837 int letter = 0; | |
2838 STAB_CODE_TYPE code; | |
2839 rtx addr = 0; | |
2840 int number = 0; | |
2841 int regno = -1; | |
2842 | |
2843 /* Don't mention a variable at all | |
2844 if it was completely optimized into nothingness. | |
2845 | |
2846 If the decl was from an inline function, then its rtl | |
2847 is not identically the rtl that was used in this | |
2848 particular compilation. */ | |
2849 if (GET_CODE (home) == SUBREG) | |
2850 { | |
2851 rtx value = home; | |
2852 | |
2853 while (GET_CODE (value) == SUBREG) | |
2854 value = SUBREG_REG (value); | |
2855 if (REG_P (value)) | |
2856 { | |
2857 if (REGNO (value) >= FIRST_PSEUDO_REGISTER) | |
2858 return 0; | |
2859 } | |
2860 home = alter_subreg (&home); | |
2861 } | |
2862 if (REG_P (home)) | |
2863 { | |
2864 regno = REGNO (home); | |
2865 if (regno >= FIRST_PSEUDO_REGISTER) | |
2866 return 0; | |
2867 } | |
2868 | |
2869 /* The kind-of-variable letter depends on where | |
2870 the variable is and on the scope of its name: | |
2871 G and N_GSYM for static storage and global scope, | |
2872 S for static storage and file scope, | |
2873 V for static storage and local scope, | |
2874 for those two, use N_LCSYM if data is in bss segment, | |
2875 N_STSYM if in data segment, N_FUN otherwise. | |
2876 (We used N_FUN originally, then changed to N_STSYM | |
2877 to please GDB. However, it seems that confused ld. | |
2878 Now GDB has been fixed to like N_FUN, says Kingdon.) | |
2879 no letter at all, and N_LSYM, for auto variable, | |
2880 r and N_RSYM for register variable. */ | |
2881 | |
2882 if (MEM_P (home) && GET_CODE (XEXP (home, 0)) == SYMBOL_REF) | |
2883 { | |
2884 if (TREE_PUBLIC (decl)) | |
2885 { | |
2886 int offs; | |
2887 letter = 'G'; | |
2888 code = N_GSYM; | |
2889 if (NULL != dbxout_common_check (decl, &offs)) | |
2890 { | |
2891 letter = 'V'; | |
2892 addr = 0; | |
2893 number = offs; | |
2894 } | |
2895 } | |
2896 else | |
2897 { | |
2898 addr = XEXP (home, 0); | |
2899 | |
2900 letter = decl_function_context (decl) ? 'V' : 'S'; | |
2901 | |
2902 /* Some ports can transform a symbol ref into a label ref, | |
2903 because the symbol ref is too far away and has to be | |
2904 dumped into a constant pool. Alternatively, the symbol | |
2905 in the constant pool might be referenced by a different | |
2906 symbol. */ | |
2907 if (GET_CODE (addr) == SYMBOL_REF | |
2908 && CONSTANT_POOL_ADDRESS_P (addr)) | |
2909 { | |
2910 bool marked; | |
2911 rtx tmp = get_pool_constant_mark (addr, &marked); | |
2912 | |
2913 if (GET_CODE (tmp) == SYMBOL_REF) | |
2914 { | |
2915 addr = tmp; | |
2916 if (CONSTANT_POOL_ADDRESS_P (addr)) | |
2917 get_pool_constant_mark (addr, &marked); | |
2918 else | |
2919 marked = true; | |
2920 } | |
2921 else if (GET_CODE (tmp) == LABEL_REF) | |
2922 { | |
2923 addr = tmp; | |
2924 marked = true; | |
2925 } | |
2926 | |
2927 /* If all references to the constant pool were optimized | |
2928 out, we just ignore the symbol. */ | |
2929 if (!marked) | |
2930 return 0; | |
2931 } | |
2932 | |
2933 /* This should be the same condition as in assemble_variable, but | |
2934 we don't have access to dont_output_data here. So, instead, | |
2935 we rely on the fact that error_mark_node initializers always | |
2936 end up in bss for C++ and never end up in bss for C. */ | |
2937 if (DECL_INITIAL (decl) == 0 | |
2938 || (!strcmp (lang_hooks.name, "GNU C++") | |
2939 && DECL_INITIAL (decl) == error_mark_node)) | |
2940 { | |
2941 int offs; | |
2942 code = N_LCSYM; | |
2943 if (NULL != dbxout_common_check (decl, &offs)) | |
2944 { | |
2945 addr = 0; | |
2946 number = offs; | |
2947 letter = 'V'; | |
2948 code = N_GSYM; | |
2949 } | |
2950 } | |
2951 else if (DECL_IN_TEXT_SECTION (decl)) | |
2952 /* This is not quite right, but it's the closest | |
2953 of all the codes that Unix defines. */ | |
2954 code = DBX_STATIC_CONST_VAR_CODE; | |
2955 else | |
2956 { | |
2957 /* Ultrix `as' seems to need this. */ | |
2958 #ifdef DBX_STATIC_STAB_DATA_SECTION | |
2959 switch_to_section (data_section); | |
2960 #endif | |
2961 code = N_STSYM; | |
2962 } | |
2963 } | |
2964 } | |
2965 else if (regno >= 0) | |
2966 { | |
2967 letter = 'r'; | |
2968 code = N_RSYM; | |
2969 number = DBX_REGISTER_NUMBER (regno); | |
2970 } | |
2971 else if (MEM_P (home) | |
2972 && (MEM_P (XEXP (home, 0)) | |
2973 || (REG_P (XEXP (home, 0)) | |
2974 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM | |
2975 && REGNO (XEXP (home, 0)) != STACK_POINTER_REGNUM | |
2976 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
2977 && REGNO (XEXP (home, 0)) != ARG_POINTER_REGNUM | |
2978 #endif | |
2979 ))) | |
2980 /* If the value is indirect by memory or by a register | |
2981 that isn't the frame pointer | |
2982 then it means the object is variable-sized and address through | |
2983 that register or stack slot. DBX has no way to represent this | |
2984 so all we can do is output the variable as a pointer. | |
2985 If it's not a parameter, ignore it. */ | |
2986 { | |
2987 if (REG_P (XEXP (home, 0))) | |
2988 { | |
2989 letter = 'r'; | |
2990 code = N_RSYM; | |
2991 if (REGNO (XEXP (home, 0)) >= FIRST_PSEUDO_REGISTER) | |
2992 return 0; | |
2993 number = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0))); | |
2994 } | |
2995 else | |
2996 { | |
2997 code = N_LSYM; | |
2998 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))). | |
2999 We want the value of that CONST_INT. */ | |
3000 number = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0)); | |
3001 } | |
3002 | |
3003 /* Effectively do build_pointer_type, but don't cache this type, | |
3004 since it might be temporary whereas the type it points to | |
3005 might have been saved for inlining. */ | |
3006 /* Don't use REFERENCE_TYPE because dbx can't handle that. */ | |
3007 type = make_node (POINTER_TYPE); | |
3008 TREE_TYPE (type) = TREE_TYPE (decl); | |
3009 } | |
3010 else if (MEM_P (home) | |
3011 && REG_P (XEXP (home, 0))) | |
3012 { | |
3013 code = N_LSYM; | |
3014 number = DEBUGGER_AUTO_OFFSET (XEXP (home, 0)); | |
3015 } | |
3016 else if (MEM_P (home) | |
3017 && GET_CODE (XEXP (home, 0)) == PLUS | |
3018 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT) | |
3019 { | |
3020 code = N_LSYM; | |
3021 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...))) | |
3022 We want the value of that CONST_INT. */ | |
3023 number = DEBUGGER_AUTO_OFFSET (XEXP (home, 0)); | |
3024 } | |
3025 else if (MEM_P (home) | |
3026 && GET_CODE (XEXP (home, 0)) == CONST) | |
3027 { | |
3028 /* Handle an obscure case which can arise when optimizing and | |
3029 when there are few available registers. (This is *always* | |
3030 the case for i386/i486 targets). The RTL looks like | |
3031 (MEM (CONST ...)) even though this variable is a local `auto' | |
3032 or a local `register' variable. In effect, what has happened | |
3033 is that the reload pass has seen that all assignments and | |
3034 references for one such a local variable can be replaced by | |
3035 equivalent assignments and references to some static storage | |
3036 variable, thereby avoiding the need for a register. In such | |
3037 cases we're forced to lie to debuggers and tell them that | |
3038 this variable was itself `static'. */ | |
3039 int offs; | |
3040 code = N_LCSYM; | |
3041 letter = 'V'; | |
3042 if (NULL == dbxout_common_check (decl, &offs)) | |
3043 addr = XEXP (XEXP (home, 0), 0); | |
3044 else | |
3045 { | |
3046 addr = 0; | |
3047 number = offs; | |
3048 code = N_GSYM; | |
3049 } | |
3050 } | |
3051 else if (GET_CODE (home) == CONCAT) | |
3052 { | |
3053 tree subtype; | |
3054 | |
3055 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE, | |
3056 for example), then there is no easy way to figure out | |
3057 what SUBTYPE should be. So, we give up. */ | |
3058 if (TREE_CODE (type) != COMPLEX_TYPE) | |
3059 return 0; | |
3060 | |
3061 subtype = TREE_TYPE (type); | |
3062 | |
3063 /* If the variable's storage is in two parts, | |
3064 output each as a separate stab with a modified name. */ | |
3065 if (WORDS_BIG_ENDIAN) | |
3066 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0)); | |
3067 else | |
3068 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0)); | |
3069 | |
3070 if (WORDS_BIG_ENDIAN) | |
3071 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1)); | |
3072 else | |
3073 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1)); | |
3074 return 1; | |
3075 } | |
3076 else | |
3077 /* Address might be a MEM, when DECL is a variable-sized object. | |
3078 Or it might be const0_rtx, meaning previous passes | |
3079 want us to ignore this variable. */ | |
3080 return 0; | |
3081 | |
3082 /* Ok, start a symtab entry and output the variable name. */ | |
3083 emit_pending_bincls_if_required (); | |
3084 FORCE_TEXT; | |
3085 | |
3086 #ifdef DBX_STATIC_BLOCK_START | |
3087 DBX_STATIC_BLOCK_START (asm_out_file, code); | |
3088 #endif | |
3089 | |
3090 dbxout_begin_complex_stabs_noforcetext (); | |
3091 dbxout_symbol_name (decl, suffix, letter); | |
3092 dbxout_type (type, 0); | |
3093 dbxout_finish_complex_stabs (decl, code, addr, 0, number); | |
3094 | |
3095 #ifdef DBX_STATIC_BLOCK_END | |
3096 DBX_STATIC_BLOCK_END (asm_out_file, code); | |
3097 #endif | |
3098 return 1; | |
3099 } | |
3100 | |
3101 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX. | |
3102 Then output LETTER to indicate the kind of location the symbol has. */ | |
3103 | |
3104 static void | |
3105 dbxout_symbol_name (tree decl, const char *suffix, int letter) | |
3106 { | |
3107 tree name; | |
3108 | |
3109 if (DECL_CONTEXT (decl) | |
3110 && (TYPE_P (DECL_CONTEXT (decl)) | |
3111 || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)) | |
3112 /* One slight hitch: if this is a VAR_DECL which is a class member | |
3113 or a namespace member, we must put out the mangled name instead of the | |
3114 DECL_NAME. Note also that static member (variable) names DO NOT begin | |
3115 with underscores in .stabs directives. */ | |
3116 name = DECL_ASSEMBLER_NAME (decl); | |
3117 else | |
3118 /* ...but if we're function-local, we don't want to include the junk | |
3119 added by ASM_FORMAT_PRIVATE_NAME. */ | |
3120 name = DECL_NAME (decl); | |
3121 | |
3122 if (name) | |
3123 stabstr_I (name); | |
3124 else | |
3125 stabstr_S ("(anon)"); | |
3126 | |
3127 if (suffix) | |
3128 stabstr_S (suffix); | |
3129 stabstr_C (':'); | |
3130 if (letter) | |
3131 stabstr_C (letter); | |
3132 } | |
3133 | |
3134 | |
3135 /* Output the common block name for DECL in a stabs. | |
3136 | |
3137 Symbols in global common (.comm) get wrapped with an N_BCOMM/N_ECOMM pair | |
3138 around each group of symbols in the same .comm area. The N_GSYM stabs | |
3139 that are emitted only contain the offset in the common area. This routine | |
3140 emits the N_BCOMM and N_ECOMM stabs. */ | |
3141 | |
3142 static void | |
3143 dbxout_common_name (tree decl, const char *name, STAB_CODE_TYPE op) | |
3144 { | |
3145 dbxout_begin_complex_stabs (); | |
3146 stabstr_S (name); | |
3147 dbxout_finish_complex_stabs (decl, op, NULL_RTX, NULL, 0); | |
3148 } | |
3149 | |
3150 /* Check decl to determine whether it is a VAR_DECL destined for storage in a | |
3151 common area. If it is, the return value will be a non-null string giving | |
3152 the name of the common storage block it will go into. If non-null, the | |
3153 value is the offset into the common block for that symbol's storage. */ | |
3154 | |
3155 static const char * | |
3156 dbxout_common_check (tree decl, int *value) | |
3157 { | |
3158 rtx home; | |
3159 rtx sym_addr; | |
3160 const char *name = NULL; | |
3161 | |
3162 /* If the decl isn't a VAR_DECL, or if it isn't public or static, or if | |
3163 it does not have a value (the offset into the common area), or if it | |
3164 is thread local (as opposed to global) then it isn't common, and shouldn't | |
3165 be handled as such. | |
3166 | |
3167 ??? DECL_THREAD_LOCAL_P check prevents problems with improper .stabs | |
3168 for thread-local symbols. Can be handled via same mechanism as used | |
3169 in dwarf2out.c. */ | |
3170 if (TREE_CODE (decl) != VAR_DECL | |
3171 || !TREE_PUBLIC(decl) | |
3172 || !TREE_STATIC(decl) | |
3173 || !DECL_HAS_VALUE_EXPR_P(decl) | |
3174 || DECL_THREAD_LOCAL_P (decl) | |
3175 || !is_fortran ()) | |
3176 return NULL; | |
3177 | |
3178 home = DECL_RTL (decl); | |
3179 if (home == NULL_RTX || GET_CODE (home) != MEM) | |
3180 return NULL; | |
3181 | |
3182 sym_addr = dbxout_expand_expr (DECL_VALUE_EXPR (decl)); | |
3183 if (sym_addr == NULL_RTX || GET_CODE (sym_addr) != MEM) | |
3184 return NULL; | |
3185 | |
3186 sym_addr = XEXP (sym_addr, 0); | |
3187 if (GET_CODE (sym_addr) == CONST) | |
3188 sym_addr = XEXP (sym_addr, 0); | |
3189 if ((GET_CODE (sym_addr) == SYMBOL_REF || GET_CODE (sym_addr) == PLUS) | |
3190 && DECL_INITIAL (decl) == 0) | |
3191 { | |
3192 | |
3193 /* We have a sym that will go into a common area, meaning that it | |
3194 will get storage reserved with a .comm/.lcomm assembler pseudo-op. | |
3195 | |
3196 Determine name of common area this symbol will be an offset into, | |
3197 and offset into that area. Also retrieve the decl for the area | |
3198 that the symbol is offset into. */ | |
3199 tree cdecl = NULL; | |
3200 | |
3201 switch (GET_CODE (sym_addr)) | |
3202 { | |
3203 case PLUS: | |
3204 if (GET_CODE (XEXP (sym_addr, 0)) == CONST_INT) | |
3205 { | |
3206 name = | |
3207 targetm.strip_name_encoding(XSTR (XEXP (sym_addr, 1), 0)); | |
3208 *value = INTVAL (XEXP (sym_addr, 0)); | |
3209 cdecl = SYMBOL_REF_DECL (XEXP (sym_addr, 1)); | |
3210 } | |
3211 else | |
3212 { | |
3213 name = | |
3214 targetm.strip_name_encoding(XSTR (XEXP (sym_addr, 0), 0)); | |
3215 *value = INTVAL (XEXP (sym_addr, 1)); | |
3216 cdecl = SYMBOL_REF_DECL (XEXP (sym_addr, 0)); | |
3217 } | |
3218 break; | |
3219 | |
3220 case SYMBOL_REF: | |
3221 name = targetm.strip_name_encoding(XSTR (sym_addr, 0)); | |
3222 *value = 0; | |
3223 cdecl = SYMBOL_REF_DECL (sym_addr); | |
3224 break; | |
3225 | |
3226 default: | |
3227 error ("common symbol debug info is not structured as " | |
3228 "symbol+offset"); | |
3229 } | |
3230 | |
3231 /* Check area common symbol is offset into. If this is not public, then | |
3232 it is not a symbol in a common block. It must be a .lcomm symbol, not | |
3233 a .comm symbol. */ | |
3234 if (cdecl == NULL || !TREE_PUBLIC(cdecl)) | |
3235 name = NULL; | |
3236 } | |
3237 else | |
3238 name = NULL; | |
3239 | |
3240 return name; | |
3241 } | |
3242 | |
3243 /* Output definitions of all the decls in a chain. Return nonzero if | |
3244 anything was output */ | |
3245 | |
3246 int | |
3247 dbxout_syms (tree syms) | |
3248 { | |
3249 int result = 0; | |
3250 const char *comm_prev = NULL; | |
3251 tree syms_prev = NULL; | |
3252 | |
3253 while (syms) | |
3254 { | |
3255 int temp, copen, cclos; | |
3256 const char *comm_new; | |
3257 | |
3258 /* Check for common symbol, and then progression into a new/different | |
3259 block of common symbols. Emit closing/opening common bracket if | |
3260 necessary. */ | |
3261 comm_new = dbxout_common_check (syms, &temp); | |
3262 copen = comm_new != NULL | |
3263 && (comm_prev == NULL || strcmp (comm_new, comm_prev)); | |
3264 cclos = comm_prev != NULL | |
3265 && (comm_new == NULL || strcmp (comm_new, comm_prev)); | |
3266 if (cclos) | |
3267 dbxout_common_name (syms_prev, comm_prev, N_ECOMM); | |
3268 if (copen) | |
3269 { | |
3270 dbxout_common_name (syms, comm_new, N_BCOMM); | |
3271 syms_prev = syms; | |
3272 } | |
3273 comm_prev = comm_new; | |
3274 | |
3275 result += dbxout_symbol (syms, 1); | |
3276 syms = TREE_CHAIN (syms); | |
3277 } | |
3278 | |
3279 if (comm_prev != NULL) | |
3280 dbxout_common_name (syms_prev, comm_prev, N_ECOMM); | |
3281 | |
3282 return result; | |
3283 } | |
3284 | |
3285 /* The following two functions output definitions of function parameters. | |
3286 Each parameter gets a definition locating it in the parameter list. | |
3287 Each parameter that is a register variable gets a second definition | |
3288 locating it in the register. | |
3289 | |
3290 Printing or argument lists in gdb uses the definitions that | |
3291 locate in the parameter list. But reference to the variable in | |
3292 expressions uses preferentially the definition as a register. */ | |
3293 | |
3294 /* Output definitions, referring to storage in the parmlist, | |
3295 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */ | |
3296 | |
3297 void | |
3298 dbxout_parms (tree parms) | |
3299 { | |
3300 ++debug_nesting; | |
3301 emit_pending_bincls_if_required (); | |
3302 | |
3303 for (; parms; parms = TREE_CHAIN (parms)) | |
3304 if (DECL_NAME (parms) | |
3305 && TREE_TYPE (parms) != error_mark_node | |
3306 && DECL_RTL_SET_P (parms) | |
3307 && DECL_INCOMING_RTL (parms)) | |
3308 { | |
3309 tree eff_type; | |
3310 char letter; | |
3311 STAB_CODE_TYPE code; | |
3312 int number; | |
3313 | |
3314 /* Perform any necessary register eliminations on the parameter's rtl, | |
3315 so that the debugging output will be accurate. */ | |
3316 DECL_INCOMING_RTL (parms) | |
3317 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX); | |
3318 SET_DECL_RTL (parms, eliminate_regs (DECL_RTL (parms), 0, NULL_RTX)); | |
3319 #ifdef LEAF_REG_REMAP | |
3320 if (current_function_uses_only_leaf_regs) | |
3321 { | |
3322 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms)); | |
3323 leaf_renumber_regs_insn (DECL_RTL (parms)); | |
3324 } | |
3325 #endif | |
3326 | |
3327 if (PARM_PASSED_IN_MEMORY (parms)) | |
3328 { | |
3329 rtx inrtl = XEXP (DECL_INCOMING_RTL (parms), 0); | |
3330 | |
3331 /* ??? Here we assume that the parm address is indexed | |
3332 off the frame pointer or arg pointer. | |
3333 If that is not true, we produce meaningless results, | |
3334 but do not crash. */ | |
3335 if (GET_CODE (inrtl) == PLUS | |
3336 && GET_CODE (XEXP (inrtl, 1)) == CONST_INT) | |
3337 number = INTVAL (XEXP (inrtl, 1)); | |
3338 else | |
3339 number = 0; | |
3340 | |
3341 code = N_PSYM; | |
3342 number = DEBUGGER_ARG_OFFSET (number, inrtl); | |
3343 letter = 'p'; | |
3344 | |
3345 /* It is quite tempting to use TREE_TYPE (parms) instead | |
3346 of DECL_ARG_TYPE (parms) for the eff_type, so that gcc | |
3347 reports the actual type of the parameter, rather than | |
3348 the promoted type. This certainly makes GDB's life | |
3349 easier, at least for some ports. The change is a bad | |
3350 idea however, since GDB expects to be able access the | |
3351 type without performing any conversions. So for | |
3352 example, if we were passing a float to an unprototyped | |
3353 function, gcc will store a double on the stack, but if | |
3354 we emit a stab saying the type is a float, then gdb | |
3355 will only read in a single value, and this will produce | |
3356 an erroneous value. */ | |
3357 eff_type = DECL_ARG_TYPE (parms); | |
3358 } | |
3359 else if (REG_P (DECL_RTL (parms))) | |
3360 { | |
3361 rtx best_rtl; | |
3362 | |
3363 /* Parm passed in registers and lives in registers or nowhere. */ | |
3364 code = DBX_REGPARM_STABS_CODE; | |
3365 letter = DBX_REGPARM_STABS_LETTER; | |
3366 | |
3367 /* For parms passed in registers, it is better to use the | |
3368 declared type of the variable, not the type it arrived in. */ | |
3369 eff_type = TREE_TYPE (parms); | |
3370 | |
3371 /* If parm lives in a register, use that register; pretend | |
3372 the parm was passed there. It would be more consistent | |
3373 to describe the register where the parm was passed, but | |
3374 in practice that register usually holds something else. | |
3375 If the parm lives nowhere, use the register where it | |
3376 was passed. */ | |
3377 if (REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER) | |
3378 best_rtl = DECL_RTL (parms); | |
3379 else if (GET_CODE (DECL_INCOMING_RTL (parms)) == PARALLEL) | |
3380 best_rtl = XEXP (XVECEXP (DECL_INCOMING_RTL (parms), 0, 0), 0); | |
3381 else | |
3382 best_rtl = DECL_INCOMING_RTL (parms); | |
3383 | |
3384 number = DBX_REGISTER_NUMBER (REGNO (best_rtl)); | |
3385 } | |
3386 else if (MEM_P (DECL_RTL (parms)) | |
3387 && REG_P (XEXP (DECL_RTL (parms), 0)) | |
3388 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM | |
3389 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM | |
3390 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
3391 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM | |
3392 #endif | |
3393 ) | |
3394 { | |
3395 /* Parm was passed via invisible reference. | |
3396 That is, its address was passed in a register. | |
3397 Output it as if it lived in that register. | |
3398 The debugger will know from the type | |
3399 that it was actually passed by invisible reference. */ | |
3400 | |
3401 code = DBX_REGPARM_STABS_CODE; | |
3402 | |
3403 /* GDB likes this marked with a special letter. */ | |
3404 letter = (use_gnu_debug_info_extensions | |
3405 ? 'a' : DBX_REGPARM_STABS_LETTER); | |
3406 eff_type = TREE_TYPE (parms); | |
3407 | |
3408 /* DECL_RTL looks like (MEM (REG...). Get the register number. | |
3409 If it is an unallocated pseudo-reg, then use the register where | |
3410 it was passed instead. | |
3411 ??? Why is DBX_REGISTER_NUMBER not used here? */ | |
3412 | |
3413 if (REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER) | |
3414 number = REGNO (XEXP (DECL_RTL (parms), 0)); | |
3415 else | |
3416 number = REGNO (DECL_INCOMING_RTL (parms)); | |
3417 } | |
3418 else if (MEM_P (DECL_RTL (parms)) | |
3419 && MEM_P (XEXP (DECL_RTL (parms), 0))) | |
3420 { | |
3421 /* Parm was passed via invisible reference, with the reference | |
3422 living on the stack. DECL_RTL looks like | |
3423 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it | |
3424 could look like (MEM (MEM (REG))). */ | |
3425 | |
3426 code = N_PSYM; | |
3427 letter = 'v'; | |
3428 eff_type = TREE_TYPE (parms); | |
3429 | |
3430 if (!REG_P (XEXP (XEXP (DECL_RTL (parms), 0), 0))) | |
3431 number = INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms), 0), 0), 1)); | |
3432 else | |
3433 number = 0; | |
3434 | |
3435 number = DEBUGGER_ARG_OFFSET (number, | |
3436 XEXP (XEXP (DECL_RTL (parms), 0), 0)); | |
3437 } | |
3438 else if (MEM_P (DECL_RTL (parms)) | |
3439 && XEXP (DECL_RTL (parms), 0) != const0_rtx | |
3440 /* ??? A constant address for a parm can happen | |
3441 when the reg it lives in is equiv to a constant in memory. | |
3442 Should make this not happen, after 2.4. */ | |
3443 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0))) | |
3444 { | |
3445 /* Parm was passed in registers but lives on the stack. */ | |
3446 | |
3447 code = N_PSYM; | |
3448 letter = 'p'; | |
3449 eff_type = TREE_TYPE (parms); | |
3450 | |
3451 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))), | |
3452 in which case we want the value of that CONST_INT, | |
3453 or (MEM (REG ...)), | |
3454 in which case we use a value of zero. */ | |
3455 if (!REG_P (XEXP (DECL_RTL (parms), 0))) | |
3456 number = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)); | |
3457 else | |
3458 number = 0; | |
3459 | |
3460 /* Make a big endian correction if the mode of the type of the | |
3461 parameter is not the same as the mode of the rtl. */ | |
3462 if (BYTES_BIG_ENDIAN | |
3463 && TYPE_MODE (TREE_TYPE (parms)) != GET_MODE (DECL_RTL (parms)) | |
3464 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms))) < UNITS_PER_WORD) | |
3465 number += (GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))) | |
3466 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms)))); | |
3467 } | |
3468 else | |
3469 /* ??? We don't know how to represent this argument. */ | |
3470 continue; | |
3471 | |
3472 dbxout_begin_complex_stabs (); | |
3473 | |
3474 if (DECL_NAME (parms)) | |
3475 { | |
3476 stabstr_I (DECL_NAME (parms)); | |
3477 stabstr_C (':'); | |
3478 } | |
3479 else | |
3480 stabstr_S ("(anon):"); | |
3481 stabstr_C (letter); | |
3482 dbxout_type (eff_type, 0); | |
3483 dbxout_finish_complex_stabs (parms, code, 0, 0, number); | |
3484 } | |
3485 DBXOUT_DECR_NESTING; | |
3486 } | |
3487 | |
3488 /* Output definitions for the places where parms live during the function, | |
3489 when different from where they were passed, when the parms were passed | |
3490 in memory. | |
3491 | |
3492 It is not useful to do this for parms passed in registers | |
3493 that live during the function in different registers, because it is | |
3494 impossible to look in the passed register for the passed value, | |
3495 so we use the within-the-function register to begin with. | |
3496 | |
3497 PARMS is a chain of PARM_DECL nodes. */ | |
3498 | |
3499 void | |
3500 dbxout_reg_parms (tree parms) | |
3501 { | |
3502 ++debug_nesting; | |
3503 | |
3504 for (; parms; parms = TREE_CHAIN (parms)) | |
3505 if (DECL_NAME (parms) && PARM_PASSED_IN_MEMORY (parms)) | |
3506 { | |
3507 /* Report parms that live in registers during the function | |
3508 but were passed in memory. */ | |
3509 if (REG_P (DECL_RTL (parms)) | |
3510 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER) | |
3511 dbxout_symbol_location (parms, TREE_TYPE (parms), | |
3512 0, DECL_RTL (parms)); | |
3513 else if (GET_CODE (DECL_RTL (parms)) == CONCAT) | |
3514 dbxout_symbol_location (parms, TREE_TYPE (parms), | |
3515 0, DECL_RTL (parms)); | |
3516 /* Report parms that live in memory but not where they were passed. */ | |
3517 else if (MEM_P (DECL_RTL (parms)) | |
3518 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms))) | |
3519 dbxout_symbol_location (parms, TREE_TYPE (parms), | |
3520 0, DECL_RTL (parms)); | |
3521 } | |
3522 DBXOUT_DECR_NESTING; | |
3523 } | |
3524 | |
3525 /* Given a chain of ..._TYPE nodes (as come in a parameter list), | |
3526 output definitions of those names, in raw form */ | |
3527 | |
3528 static void | |
3529 dbxout_args (tree args) | |
3530 { | |
3531 while (args) | |
3532 { | |
3533 stabstr_C (','); | |
3534 dbxout_type (TREE_VALUE (args), 0); | |
3535 args = TREE_CHAIN (args); | |
3536 } | |
3537 } | |
3538 | |
3539 #if defined (DBX_DEBUGGING_INFO) | |
3540 | |
3541 /* Subroutine of dbxout_block. Emit an N_LBRAC stab referencing LABEL. | |
3542 BEGIN_LABEL is the name of the beginning of the function, which may | |
3543 be required. */ | |
3544 static void | |
3545 dbx_output_lbrac (const char *label, | |
3546 const char *begin_label ATTRIBUTE_UNUSED) | |
3547 { | |
3548 dbxout_begin_stabn (N_LBRAC); | |
3549 if (DBX_BLOCKS_FUNCTION_RELATIVE) | |
3550 dbxout_stab_value_label_diff (label, begin_label); | |
3551 else | |
3552 dbxout_stab_value_label (label); | |
3553 } | |
3554 | |
3555 /* Subroutine of dbxout_block. Emit an N_RBRAC stab referencing LABEL. | |
3556 BEGIN_LABEL is the name of the beginning of the function, which may | |
3557 be required. */ | |
3558 static void | |
3559 dbx_output_rbrac (const char *label, | |
3560 const char *begin_label ATTRIBUTE_UNUSED) | |
3561 { | |
3562 dbxout_begin_stabn (N_RBRAC); | |
3563 if (DBX_BLOCKS_FUNCTION_RELATIVE) | |
3564 dbxout_stab_value_label_diff (label, begin_label); | |
3565 else | |
3566 dbxout_stab_value_label (label); | |
3567 } | |
3568 | |
3569 /* Output everything about a symbol block (a BLOCK node | |
3570 that represents a scope level), | |
3571 including recursive output of contained blocks. | |
3572 | |
3573 BLOCK is the BLOCK node. | |
3574 DEPTH is its depth within containing symbol blocks. | |
3575 ARGS is usually zero; but for the outermost block of the | |
3576 body of a function, it is a chain of PARM_DECLs for the function parameters. | |
3577 We output definitions of all the register parms | |
3578 as if they were local variables of that block. | |
3579 | |
3580 If -g1 was used, we count blocks just the same, but output nothing | |
3581 except for the outermost block. | |
3582 | |
3583 Actually, BLOCK may be several blocks chained together. | |
3584 We handle them all in sequence. */ | |
3585 | |
3586 static void | |
3587 dbxout_block (tree block, int depth, tree args) | |
3588 { | |
3589 char begin_label[20]; | |
3590 /* Reference current function start using LFBB. */ | |
3591 ASM_GENERATE_INTERNAL_LABEL (begin_label, "LFBB", scope_labelno); | |
3592 | |
3593 while (block) | |
3594 { | |
3595 /* Ignore blocks never expanded or otherwise marked as real. */ | |
3596 if (TREE_ASM_WRITTEN (block)) | |
3597 { | |
3598 int did_output; | |
3599 int blocknum = BLOCK_NUMBER (block); | |
3600 | |
3601 /* In dbx format, the syms of a block come before the N_LBRAC. | |
3602 If nothing is output, we don't need the N_LBRAC, either. */ | |
3603 did_output = 0; | |
3604 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0) | |
3605 did_output = dbxout_syms (BLOCK_VARS (block)); | |
3606 if (args) | |
3607 dbxout_reg_parms (args); | |
3608 | |
3609 /* Now output an N_LBRAC symbol to represent the beginning of | |
3610 the block. Use the block's tree-walk order to generate | |
3611 the assembler symbols LBBn and LBEn | |
3612 that final will define around the code in this block. */ | |
3613 if (did_output) | |
3614 { | |
3615 char buf[20]; | |
3616 const char *scope_start; | |
3617 | |
3618 if (depth == 0) | |
3619 /* The outermost block doesn't get LBB labels; use | |
3620 the LFBB local symbol emitted by dbxout_begin_prologue. */ | |
3621 scope_start = begin_label; | |
3622 else | |
3623 { | |
3624 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum); | |
3625 scope_start = buf; | |
3626 } | |
3627 | |
3628 dbx_output_lbrac (scope_start, begin_label); | |
3629 } | |
3630 | |
3631 /* Output the subblocks. */ | |
3632 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE); | |
3633 | |
3634 /* Refer to the marker for the end of the block. */ | |
3635 if (did_output) | |
3636 { | |
3637 char buf[100]; | |
3638 if (depth == 0) | |
3639 /* The outermost block doesn't get LBE labels; | |
3640 use the "scope" label which will be emitted | |
3641 by dbxout_function_end. */ | |
3642 ASM_GENERATE_INTERNAL_LABEL (buf, "Lscope", scope_labelno); | |
3643 else | |
3644 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum); | |
3645 | |
3646 dbx_output_rbrac (buf, begin_label); | |
3647 } | |
3648 } | |
3649 block = BLOCK_CHAIN (block); | |
3650 } | |
3651 } | |
3652 | |
3653 /* Output the information about a function and its arguments and result. | |
3654 Usually this follows the function's code, | |
3655 but on some systems, it comes before. */ | |
3656 | |
3657 static void | |
3658 dbxout_begin_function (tree decl) | |
3659 { | |
3660 int saved_tree_used1; | |
3661 | |
3662 if (DECL_IGNORED_P (decl)) | |
3663 return; | |
3664 | |
3665 saved_tree_used1 = TREE_USED (decl); | |
3666 TREE_USED (decl) = 1; | |
3667 if (DECL_NAME (DECL_RESULT (decl)) != 0) | |
3668 { | |
3669 int saved_tree_used2 = TREE_USED (DECL_RESULT (decl)); | |
3670 TREE_USED (DECL_RESULT (decl)) = 1; | |
3671 dbxout_symbol (decl, 0); | |
3672 TREE_USED (DECL_RESULT (decl)) = saved_tree_used2; | |
3673 } | |
3674 else | |
3675 dbxout_symbol (decl, 0); | |
3676 TREE_USED (decl) = saved_tree_used1; | |
3677 | |
3678 dbxout_parms (DECL_ARGUMENTS (decl)); | |
3679 if (DECL_NAME (DECL_RESULT (decl)) != 0) | |
3680 dbxout_symbol (DECL_RESULT (decl), 1); | |
3681 } | |
3682 #endif /* DBX_DEBUGGING_INFO */ | |
3683 | |
3684 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */ | |
3685 | |
3686 #include "gt-dbxout.h" |