Commit | Line | Data |
---|---|---|
4eef3bef C |
1 | /* Output dbx-format symbol table information from GNU compiler. |
2 | Copyright (C) 1987, 1988, 1992 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | /* Output dbx-format symbol table data. | |
22 | This consists of many symbol table entries, each of them | |
23 | a .stabs assembler pseudo-op with four operands: | |
24 | a "name" which is really a description of one symbol and its type, | |
25 | a "code", which is a symbol defined in stab.h whose name starts with N_, | |
26 | an unused operand always 0, | |
27 | and a "value" which is an address or an offset. | |
28 | The name is enclosed in doublequote characters. | |
29 | ||
30 | Each function, variable, typedef, and structure tag | |
31 | has a symbol table entry to define it. | |
32 | The beginning and end of each level of name scoping within | |
33 | a function are also marked by special symbol table entries. | |
34 | ||
35 | The "name" consists of the symbol name, a colon, a kind-of-symbol letter, | |
36 | and a data type number. The data type number may be followed by | |
37 | "=" and a type definition; normally this will happen the first time | |
38 | the type number is mentioned. The type definition may refer to | |
39 | other types by number, and those type numbers may be followed | |
40 | by "=" and nested definitions. | |
41 | ||
42 | This can make the "name" quite long. | |
43 | When a name is more than 80 characters, we split the .stabs pseudo-op | |
44 | into two .stabs pseudo-ops, both sharing the same "code" and "value". | |
45 | The first one is marked as continued with a double-backslash at the | |
46 | end of its "name". | |
47 | ||
48 | The kind-of-symbol letter distinguished function names from global | |
49 | variables from file-scope variables from parameters from auto | |
50 | variables in memory from typedef names from register variables. | |
51 | See `dbxout_symbol'. | |
52 | ||
53 | The "code" is mostly redundant with the kind-of-symbol letter | |
54 | that goes in the "name", but not entirely: for symbols located | |
55 | in static storage, the "code" says which segment the address is in, | |
56 | which controls how it is relocated. | |
57 | ||
58 | The "value" for a symbol in static storage | |
59 | is the core address of the symbol (actually, the assembler | |
60 | label for the symbol). For a symbol located in a stack slot | |
61 | it is the stack offset; for one in a register, the register number. | |
62 | For a typedef symbol, it is zero. | |
63 | ||
64 | If DEBUG_SYMS_TEXT is defined, all debugging symbols must be | |
65 | output while in the text section. | |
66 | ||
67 | For more on data type definitions, see `dbxout_type'. */ | |
68 | ||
69 | /* Include these first, because they may define MIN and MAX. */ | |
70 | #include <stdio.h> | |
71 | #include <errno.h> | |
72 | ||
73 | #include "config.h" | |
74 | #include "tree.h" | |
75 | #include "rtl.h" | |
76 | #include "flags.h" | |
77 | #include "regs.h" | |
78 | #include "insn-config.h" | |
79 | #include "reload.h" | |
80 | #include "defaults.h" | |
81 | #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */ | |
82 | ||
83 | #ifndef errno | |
84 | extern int errno; | |
85 | #endif | |
86 | ||
87 | #ifdef XCOFF_DEBUGGING_INFO | |
88 | #include "xcoffout.h" | |
89 | #endif | |
90 | ||
91 | #ifndef ASM_STABS_OP | |
92 | #define ASM_STABS_OP ".stabs" | |
93 | #endif | |
94 | ||
95 | #ifndef ASM_STABN_OP | |
96 | #define ASM_STABN_OP ".stabn" | |
97 | #endif | |
98 | ||
99 | #ifndef DBX_TYPE_DECL_STABS_CODE | |
100 | #define DBX_TYPE_DECL_STABS_CODE N_LSYM | |
101 | #endif | |
102 | ||
103 | #ifndef DBX_STATIC_CONST_VAR_CODE | |
104 | #define DBX_STATIC_CONST_VAR_CODE N_FUN | |
105 | #endif | |
106 | ||
107 | #ifndef DBX_REGPARM_STABS_CODE | |
108 | #define DBX_REGPARM_STABS_CODE N_RSYM | |
109 | #endif | |
110 | ||
111 | #ifndef DBX_REGPARM_STABS_LETTER | |
112 | #define DBX_REGPARM_STABS_LETTER 'P' | |
113 | #endif | |
114 | ||
115 | #ifndef DBX_MEMPARM_STABS_LETTER | |
116 | #define DBX_MEMPARM_STABS_LETTER 'p' | |
117 | #endif | |
118 | ||
119 | /* Nonzero means if the type has methods, only output debugging | |
120 | information if methods are actually written to the asm file. */ | |
121 | ||
122 | static int flag_minimal_debug = 1; | |
123 | ||
124 | /* Nonzero if we have actually used any of the GDB extensions | |
125 | to the debugging format. The idea is that we use them for the | |
126 | first time only if there's a strong reason, but once we have done that, | |
127 | we use them whenever convenient. */ | |
128 | ||
129 | static int have_used_extensions = 0; | |
130 | ||
131 | char *getpwd (); | |
132 | ||
133 | /* Typical USG systems don't have stab.h, and they also have | |
134 | no use for DBX-format debugging info. */ | |
135 | ||
136 | #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) | |
137 | ||
138 | #ifdef DEBUG_SYMS_TEXT | |
139 | #define FORCE_TEXT text_section (); | |
140 | #else | |
141 | #define FORCE_TEXT | |
142 | #endif | |
143 | ||
144 | #if defined (USG) || defined (NO_STAB_H) | |
145 | #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */ | |
146 | #else | |
147 | #include <stab.h> /* On BSD, use the system's stab.h. */ | |
148 | ||
149 | /* This is a GNU extension we need to reference in this file. */ | |
150 | #ifndef N_CATCH | |
151 | #define N_CATCH 0x54 | |
152 | #endif | |
153 | #endif /* not USG */ | |
154 | ||
155 | #ifdef __GNU_STAB__ | |
156 | #define STAB_CODE_TYPE enum __stab_debug_code | |
157 | #else | |
158 | #define STAB_CODE_TYPE int | |
159 | #endif | |
160 | ||
161 | /* 1 if PARM is passed to this function in memory. */ | |
162 | ||
163 | #define PARM_PASSED_IN_MEMORY(PARM) \ | |
164 | (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM) | |
165 | ||
166 | /* A C expression for the integer offset value of an automatic variable | |
167 | (N_LSYM) having address X (an RTX). */ | |
168 | #ifndef DEBUGGER_AUTO_OFFSET | |
169 | #define DEBUGGER_AUTO_OFFSET(X) \ | |
170 | (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) | |
171 | #endif | |
172 | ||
173 | /* A C expression for the integer offset value of an argument (N_PSYM) | |
174 | having address X (an RTX). The nominal offset is OFFSET. */ | |
175 | #ifndef DEBUGGER_ARG_OFFSET | |
176 | #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET) | |
177 | #endif | |
178 | ||
179 | /* Stream for writing to assembler file. */ | |
180 | ||
181 | static FILE *asmfile; | |
182 | ||
183 | /* Last source file name mentioned in a NOTE insn. */ | |
184 | ||
185 | static char *lastfile; | |
186 | ||
187 | /* Current working directory. */ | |
188 | ||
189 | static char *cwd; | |
190 | ||
191 | enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED}; | |
192 | ||
193 | /* Vector recording the status of describing C data types. | |
194 | When we first notice a data type (a tree node), | |
195 | we assign it a number using next_type_number. | |
196 | That is its index in this vector. | |
197 | The vector element says whether we have yet output | |
198 | the definition of the type. TYPE_XREF says we have | |
199 | output it as a cross-reference only. */ | |
200 | ||
201 | enum typestatus *typevec; | |
202 | ||
203 | /* Number of elements of space allocated in `typevec'. */ | |
204 | ||
205 | static int typevec_len; | |
206 | ||
207 | /* In dbx output, each type gets a unique number. | |
208 | This is the number for the next type output. | |
209 | The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */ | |
210 | ||
211 | static int next_type_number; | |
212 | ||
213 | /* In dbx output, we must assign symbol-blocks id numbers | |
214 | in the order in which their beginnings are encountered. | |
215 | We output debugging info that refers to the beginning and | |
216 | end of the ranges of code in each block | |
217 | with assembler labels LBBn and LBEn, where n is the block number. | |
218 | The labels are generated in final, which assigns numbers to the | |
219 | blocks in the same way. */ | |
220 | ||
221 | static int next_block_number; | |
222 | ||
223 | /* These variables are for dbxout_symbol to communicate to | |
224 | dbxout_finish_symbol. | |
225 | current_sym_code is the symbol-type-code, a symbol N_... define in stab.h. | |
226 | current_sym_value and current_sym_addr are two ways to address the | |
227 | value to store in the symtab entry. | |
228 | current_sym_addr if nonzero represents the value as an rtx. | |
229 | If that is zero, current_sym_value is used. This is used | |
230 | when the value is an offset (such as for auto variables, | |
231 | register variables and parms). */ | |
232 | ||
233 | static STAB_CODE_TYPE current_sym_code; | |
234 | static int current_sym_value; | |
235 | static rtx current_sym_addr; | |
236 | ||
237 | /* Number of chars of symbol-description generated so far for the | |
238 | current symbol. Used by CHARS and CONTIN. */ | |
239 | ||
240 | static int current_sym_nchars; | |
241 | ||
242 | /* Report having output N chars of the current symbol-description. */ | |
243 | ||
244 | #define CHARS(N) (current_sym_nchars += (N)) | |
245 | ||
246 | /* Break the current symbol-description, generating a continuation, | |
247 | if it has become long. */ | |
248 | ||
249 | #ifndef DBX_CONTIN_LENGTH | |
250 | #define DBX_CONTIN_LENGTH 80 | |
251 | #endif | |
252 | ||
253 | #if DBX_CONTIN_LENGTH > 0 | |
254 | #define CONTIN \ | |
255 | do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0) | |
256 | #else | |
257 | #define CONTIN | |
258 | #endif | |
259 | ||
260 | void dbxout_types (); | |
261 | void dbxout_args (); | |
262 | void dbxout_symbol (); | |
263 | static void dbxout_type_name (); | |
264 | static void dbxout_type (); | |
265 | static void dbxout_typedefs (); | |
266 | static void dbxout_prepare_symbol (); | |
267 | static void dbxout_finish_symbol (); | |
268 | static void dbxout_continue (); | |
269 | static void print_int_cst_octal (); | |
270 | static void print_octal (); | |
271 | \f | |
272 | #if 0 /* Not clear we will actually need this. */ | |
273 | ||
274 | /* Return the absolutized filename for the given relative | |
275 | filename. Note that if that filename is already absolute, it may | |
276 | still be returned in a modified form because this routine also | |
277 | eliminates redundant slashes and single dots and eliminates double | |
278 | dots to get a shortest possible filename from the given input | |
279 | filename. The absolutization of relative filenames is made by | |
280 | assuming that the given filename is to be taken as relative to | |
281 | the first argument (cwd) or to the current directory if cwd is | |
282 | NULL. */ | |
283 | ||
284 | static char * | |
285 | abspath (rel_filename) | |
286 | char *rel_filename; | |
287 | { | |
288 | /* Setup the current working directory as needed. */ | |
289 | char *abs_buffer | |
290 | = (char *) alloca (strlen (cwd) + strlen (rel_filename) + 1); | |
291 | char *endp = abs_buffer; | |
292 | char *outp, *inp; | |
293 | char *value; | |
294 | ||
295 | /* Copy the filename (possibly preceded by the current working | |
296 | directory name) into the absolutization buffer. */ | |
297 | ||
298 | { | |
299 | char *src_p; | |
300 | ||
301 | if (rel_filename[0] != '/') | |
302 | { | |
303 | src_p = cwd; | |
304 | while (*endp++ = *src_p++) | |
305 | continue; | |
306 | *(endp-1) = '/'; /* overwrite null */ | |
307 | } | |
308 | src_p = rel_filename; | |
309 | while (*endp++ = *src_p++) | |
310 | continue; | |
311 | if (endp[-1] == '/') | |
312 | *endp = '\0'; | |
313 | ||
314 | /* Now make a copy of abs_buffer into abs_buffer, shortening the | |
315 | filename (by taking out slashes and dots) as we go. */ | |
316 | ||
317 | outp = inp = abs_buffer; | |
318 | *outp++ = *inp++; /* copy first slash */ | |
319 | for (;;) | |
320 | { | |
321 | if (!inp[0]) | |
322 | break; | |
323 | else if (inp[0] == '/' && outp[-1] == '/') | |
324 | { | |
325 | inp++; | |
326 | continue; | |
327 | } | |
328 | else if (inp[0] == '.' && outp[-1] == '/') | |
329 | { | |
330 | if (!inp[1]) | |
331 | break; | |
332 | else if (inp[1] == '/') | |
333 | { | |
334 | inp += 2; | |
335 | continue; | |
336 | } | |
337 | else if ((inp[1] == '.') && (inp[2] == 0 || inp[2] == '/')) | |
338 | { | |
339 | inp += (inp[2] == '/') ? 3 : 2; | |
340 | outp -= 2; | |
341 | while (outp >= abs_buffer && *outp != '/') | |
342 | outp--; | |
343 | if (outp < abs_buffer) | |
344 | { | |
345 | /* Catch cases like /.. where we try to backup to a | |
346 | point above the absolute root of the logical file | |
347 | system. */ | |
348 | ||
349 | fprintf (stderr, "%s: invalid file name: %s\n", | |
350 | pname, rel_filename); | |
351 | exit (1); | |
352 | } | |
353 | *++outp = '\0'; | |
354 | continue; | |
355 | } | |
356 | } | |
357 | *outp++ = *inp++; | |
358 | } | |
359 | ||
360 | /* On exit, make sure that there is a trailing null, and make sure that | |
361 | the last character of the returned string is *not* a slash. */ | |
362 | ||
363 | *outp = '\0'; | |
364 | if (outp[-1] == '/') | |
365 | *--outp = '\0'; | |
366 | ||
367 | /* Make a copy (in the heap) of the stuff left in the absolutization | |
368 | buffer and return a pointer to the copy. */ | |
369 | ||
370 | value = (char *) oballoc (strlen (abs_buffer) + 1); | |
371 | strcpy (value, abs_buffer); | |
372 | return value; | |
373 | } | |
374 | #endif /* 0 */ | |
375 | \f | |
376 | /* At the beginning of compilation, start writing the symbol table. | |
377 | Initialize `typevec' and output the standard data types of C. */ | |
378 | ||
379 | void | |
380 | dbxout_init (asm_file, input_file_name, syms) | |
381 | FILE *asm_file; | |
382 | char *input_file_name; | |
383 | tree syms; | |
384 | { | |
385 | char ltext_label_name[100]; | |
386 | ||
387 | asmfile = asm_file; | |
388 | ||
389 | typevec_len = 100; | |
390 | typevec = (enum typestatus *) xmalloc (typevec_len * sizeof typevec[0]); | |
391 | bzero (typevec, typevec_len * sizeof typevec[0]); | |
392 | ||
393 | /* Convert Ltext into the appropriate format for local labels in case | |
394 | the system doesn't insert underscores in front of user generated | |
395 | labels. */ | |
396 | ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0); | |
397 | ||
398 | /* Put the current working directory in an N_SO symbol. */ | |
399 | #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this, | |
400 | but GDB always does. */ | |
401 | if (use_gnu_debug_info_extensions) | |
402 | #endif | |
403 | { | |
404 | if (cwd || (cwd = getpwd ())) | |
405 | { | |
406 | #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY | |
407 | DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd); | |
408 | #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */ | |
409 | fprintf (asmfile, "%s \"%s/\",%d,0,0,%s\n", ASM_STABS_OP, | |
410 | cwd, N_SO, <ext_label_name[1]); | |
411 | #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */ | |
412 | } | |
413 | } | |
414 | ||
415 | #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME | |
416 | /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That | |
417 | would give us an N_SOL, and we want an N_SO. */ | |
418 | DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name); | |
419 | #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */ | |
420 | /* We include outputting `Ltext:' here, | |
421 | because that gives you a way to override it. */ | |
422 | /* Used to put `Ltext:' before the reference, but that loses on sun 4. */ | |
423 | fprintf (asmfile, "%s \"%s\",%d,0,0,%s\n", ASM_STABS_OP, input_file_name, | |
424 | N_SO, <ext_label_name[1]); | |
425 | text_section (); | |
426 | ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", 0); | |
427 | #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */ | |
428 | ||
429 | /* Possibly output something to inform GDB that this compilation was by | |
430 | GCC. It's easier for GDB to parse it when after the N_SO's. This | |
431 | is used in Solaris 2. */ | |
432 | #ifdef ASM_IDENTIFY_GCC_AFTER_SOURCE | |
433 | ASM_IDENTIFY_GCC_AFTER_SOURCE (asmfile); | |
434 | #endif | |
435 | ||
436 | lastfile = input_file_name; | |
437 | ||
438 | next_type_number = 1; | |
439 | next_block_number = 2; | |
440 | ||
441 | /* Make sure that types `int' and `char' have numbers 1 and 2. | |
442 | Definitions of other integer types will refer to those numbers. | |
443 | (Actually it should no longer matter what their numbers are. | |
444 | Also, if any types with tags have been defined, dbxout_symbol | |
445 | will output them first, so the numbers won't be 1 and 2. That | |
446 | happens in C++. So it's a good thing it should no longer matter). */ | |
447 | ||
448 | #ifdef DBX_OUTPUT_STANDARD_TYPES | |
449 | DBX_OUTPUT_STANDARD_TYPES (syms); | |
450 | #else | |
451 | dbxout_symbol (TYPE_NAME (integer_type_node), 0); | |
452 | dbxout_symbol (TYPE_NAME (char_type_node), 0); | |
453 | #endif | |
454 | ||
455 | /* Get all permanent types that have typedef names, | |
456 | and output them all, except for those already output. */ | |
457 | ||
458 | dbxout_typedefs (syms); | |
459 | } | |
460 | ||
461 | /* Output any typedef names for types described by TYPE_DECLs in SYMS, | |
462 | in the reverse order from that which is found in SYMS. */ | |
463 | ||
464 | static void | |
465 | dbxout_typedefs (syms) | |
466 | tree syms; | |
467 | { | |
468 | if (syms) | |
469 | { | |
470 | dbxout_typedefs (TREE_CHAIN (syms)); | |
471 | if (TREE_CODE (syms) == TYPE_DECL) | |
472 | { | |
473 | tree type = TREE_TYPE (syms); | |
474 | if (TYPE_NAME (type) | |
475 | && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
476 | && ! TREE_ASM_WRITTEN (TYPE_NAME (type))) | |
477 | dbxout_symbol (TYPE_NAME (type), 0); | |
478 | } | |
479 | } | |
480 | } | |
481 | ||
482 | /* Output debugging info to FILE to switch to sourcefile FILENAME. */ | |
483 | ||
484 | void | |
485 | dbxout_source_file (file, filename) | |
486 | FILE *file; | |
487 | char *filename; | |
488 | { | |
489 | char ltext_label_name[100]; | |
490 | ||
491 | if (filename && (lastfile == 0 || strcmp (filename, lastfile))) | |
492 | { | |
493 | #ifdef DBX_OUTPUT_SOURCE_FILENAME | |
494 | DBX_OUTPUT_SOURCE_FILENAME (file, filename); | |
495 | #else | |
496 | ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0); | |
497 | fprintf (file, "%s \"%s\",%d,0,0,%s\n", ASM_STABS_OP, | |
498 | filename, N_SOL, <ext_label_name[1]); | |
499 | #endif | |
500 | lastfile = filename; | |
501 | } | |
502 | } | |
503 | ||
504 | /* Output a line number symbol entry into output stream FILE, | |
505 | for source file FILENAME and line number LINENO. */ | |
506 | ||
507 | void | |
508 | dbxout_source_line (file, filename, lineno) | |
509 | FILE *file; | |
510 | char *filename; | |
511 | int lineno; | |
512 | { | |
513 | dbxout_source_file (file, filename); | |
514 | ||
515 | #ifdef ASM_OUTPUT_SOURCE_LINE | |
516 | ASM_OUTPUT_SOURCE_LINE (file, lineno); | |
517 | #else | |
518 | fprintf (file, "\t%s %d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno); | |
519 | #endif | |
520 | } | |
521 | ||
522 | /* At the end of compilation, finish writing the symbol table. | |
523 | Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is | |
524 | to do nothing. */ | |
525 | ||
526 | void | |
527 | dbxout_finish (file, filename) | |
528 | FILE *file; | |
529 | char *filename; | |
530 | { | |
531 | #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END | |
532 | DBX_OUTPUT_MAIN_SOURCE_FILE_END (file, filename); | |
533 | #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */ | |
534 | } | |
535 | ||
536 | /* Continue a symbol-description that gets too big. | |
537 | End one symbol table entry with a double-backslash | |
538 | and start a new one, eventually producing something like | |
539 | .stabs "start......\\",code,0,value | |
540 | .stabs "...rest",code,0,value */ | |
541 | ||
542 | static void | |
543 | dbxout_continue () | |
544 | { | |
545 | #ifdef DBX_CONTIN_CHAR | |
546 | fprintf (asmfile, "%c", DBX_CONTIN_CHAR); | |
547 | #else | |
548 | fprintf (asmfile, "\\\\"); | |
549 | #endif | |
550 | dbxout_finish_symbol (NULL_TREE); | |
551 | fprintf (asmfile, "%s \"", ASM_STABS_OP); | |
552 | current_sym_nchars = 0; | |
553 | } | |
554 | \f | |
555 | /* Subroutine of `dbxout_type'. Output the type fields of TYPE. | |
556 | This must be a separate function because anonymous unions require | |
557 | recursive calls. */ | |
558 | ||
559 | static void | |
560 | dbxout_type_fields (type) | |
561 | tree type; | |
562 | { | |
563 | tree tem; | |
564 | /* Output the name, type, position (in bits), size (in bits) of each | |
565 | field. */ | |
566 | for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem)) | |
567 | { | |
568 | /* For nameless subunions and subrecords, treat their fields as ours. */ | |
569 | if (DECL_NAME (tem) == NULL_TREE | |
570 | && (TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE | |
571 | || TREE_CODE (TREE_TYPE (tem)) == RECORD_TYPE)) | |
572 | dbxout_type_fields (TREE_TYPE (tem)); | |
573 | /* Omit here local type decls until we know how to support them. */ | |
574 | else if (TREE_CODE (tem) == TYPE_DECL) | |
575 | continue; | |
576 | /* Omit here the nameless fields that are used to skip bits. */ | |
577 | else if (DECL_NAME (tem) != 0 && TREE_CODE (tem) != CONST_DECL) | |
578 | { | |
579 | /* Continue the line if necessary, | |
580 | but not before the first field. */ | |
581 | if (tem != TYPE_FIELDS (type)) | |
582 | CONTIN; | |
583 | ||
584 | if (use_gnu_debug_info_extensions | |
585 | && flag_minimal_debug | |
586 | && TREE_CODE (tem) == FIELD_DECL | |
587 | && DECL_VIRTUAL_P (tem) | |
588 | && DECL_ASSEMBLER_NAME (tem)) | |
589 | { | |
590 | have_used_extensions = 1; | |
591 | CHARS (3 + IDENTIFIER_LENGTH (DECL_NAME (TYPE_NAME (DECL_FCONTEXT (tem))))); | |
592 | fputs (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)), asmfile); | |
593 | dbxout_type (DECL_FCONTEXT (tem), 0, 0); | |
594 | fprintf (asmfile, ":"); | |
595 | dbxout_type (TREE_TYPE (tem), 0, 0); | |
596 | fprintf (asmfile, ",%d;", | |
597 | TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))); | |
598 | continue; | |
599 | } | |
600 | ||
601 | fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem))); | |
602 | CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem))); | |
603 | ||
604 | if (use_gnu_debug_info_extensions | |
605 | && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem) | |
606 | || TREE_CODE (tem) != FIELD_DECL)) | |
607 | { | |
608 | have_used_extensions = 1; | |
609 | putc ('/', asmfile); | |
610 | putc ((TREE_PRIVATE (tem) ? '0' | |
611 | : TREE_PROTECTED (tem) ? '1' : '2'), | |
612 | asmfile); | |
613 | CHARS (2); | |
614 | } | |
615 | ||
616 | dbxout_type ((TREE_CODE (tem) == FIELD_DECL | |
617 | && DECL_BIT_FIELD_TYPE (tem)) | |
618 | ? DECL_BIT_FIELD_TYPE (tem) | |
619 | : TREE_TYPE (tem), 0, 0); | |
620 | ||
621 | if (TREE_CODE (tem) == VAR_DECL) | |
622 | { | |
623 | if (TREE_STATIC (tem) && use_gnu_debug_info_extensions) | |
624 | { | |
625 | char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)); | |
626 | have_used_extensions = 1; | |
627 | fprintf (asmfile, ":%s;", name); | |
628 | CHARS (strlen (name)); | |
629 | } | |
630 | else | |
631 | { | |
632 | /* If TEM is non-static, GDB won't understand it. */ | |
633 | fprintf (asmfile, ",0,0;"); | |
634 | } | |
635 | } | |
636 | else if (TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST) | |
637 | { | |
638 | fprintf (asmfile, ",%d,%d;", | |
639 | TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)), | |
640 | TREE_INT_CST_LOW (DECL_SIZE (tem))); | |
641 | } | |
642 | else | |
643 | /* This has yet to be implemented. */ | |
644 | abort (); | |
645 | CHARS (23); | |
646 | } | |
647 | } | |
648 | } | |
649 | \f | |
650 | /* Subroutine of `dbxout_type_methods'. Output debug info about the | |
651 | method described DECL. DEBUG_NAME is an encoding of the method's | |
652 | type signature. ??? We may be able to do without DEBUG_NAME altogether | |
653 | now. */ | |
654 | ||
655 | static void | |
656 | dbxout_type_method_1 (decl, debug_name) | |
657 | tree decl; | |
658 | char *debug_name; | |
659 | { | |
660 | tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))); | |
661 | char c1 = 'A', c2; | |
662 | ||
663 | if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE) | |
664 | c2 = '?'; | |
665 | else /* it's a METHOD_TYPE. */ | |
666 | { | |
667 | /* A for normal functions. | |
668 | B for `const' member functions. | |
669 | C for `volatile' member functions. | |
670 | D for `const volatile' member functions. */ | |
671 | if (TYPE_READONLY (TREE_TYPE (firstarg))) | |
672 | c1 += 1; | |
673 | if (TYPE_VOLATILE (TREE_TYPE (firstarg))) | |
674 | c1 += 2; | |
675 | ||
676 | if (DECL_VINDEX (decl)) | |
677 | c2 = '*'; | |
678 | else | |
679 | c2 = '.'; | |
680 | } | |
681 | ||
682 | fprintf (asmfile, ":%s;%c%c%c", debug_name, | |
683 | TREE_PRIVATE (decl) ? '0' : TREE_PROTECTED (decl) ? '1' : '2', c1, c2); | |
684 | CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6 | |
685 | - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
686 | if (DECL_VINDEX (decl)) | |
687 | { | |
688 | fprintf (asmfile, "%d;", | |
689 | TREE_INT_CST_LOW (DECL_VINDEX (decl))); | |
690 | dbxout_type (DECL_CONTEXT (decl), 0, 0); | |
691 | fprintf (asmfile, ";"); | |
692 | CHARS (8); | |
693 | } | |
694 | } | |
695 | \f | |
696 | /* Subroutine of `dbxout_type'. Output debug info about the methods defined | |
697 | in TYPE. */ | |
698 | ||
699 | static void | |
700 | dbxout_type_methods (type) | |
701 | register tree type; | |
702 | { | |
703 | /* C++: put out the method names and their parameter lists */ | |
704 | tree methods = TYPE_METHODS (type); | |
705 | tree type_encoding; | |
706 | register tree fndecl; | |
707 | register tree last; | |
708 | char formatted_type_identifier_length[16]; | |
709 | register int type_identifier_length; | |
710 | ||
711 | if (methods == NULL_TREE) | |
712 | return; | |
713 | ||
714 | type_encoding = DECL_NAME (TYPE_NAME (type)); | |
715 | ||
716 | /* C++: Template classes break some assumptions made by this code about | |
717 | the class names, constructor names, and encodings for assembler | |
718 | label names. For now, disable output of dbx info for them. */ | |
719 | { | |
720 | char *ptr = IDENTIFIER_POINTER (type_encoding); | |
721 | /* This should use index. (mrs) */ | |
722 | while (*ptr && *ptr != '<') ptr++; | |
723 | if (*ptr != 0) | |
724 | { | |
725 | static int warned; | |
726 | if (!warned) | |
727 | { | |
728 | warned = 1; | |
729 | warning ("dbx info for template class methods not yet supported"); | |
730 | } | |
731 | return; | |
732 | } | |
733 | } | |
734 | ||
735 | type_identifier_length = IDENTIFIER_LENGTH (type_encoding); | |
736 | ||
737 | sprintf(formatted_type_identifier_length, "%d", type_identifier_length); | |
738 | ||
739 | if (TREE_CODE (methods) == FUNCTION_DECL) | |
740 | fndecl = methods; | |
741 | else if (TREE_VEC_ELT (methods, 0) != NULL_TREE) | |
742 | fndecl = TREE_VEC_ELT (methods, 0); | |
743 | else | |
744 | fndecl = TREE_VEC_ELT (methods, 1); | |
745 | ||
746 | while (fndecl) | |
747 | { | |
748 | tree name = DECL_NAME (fndecl); | |
749 | int need_prefix = 1; | |
750 | ||
751 | /* Group together all the methods for the same operation. | |
752 | These differ in the types of the arguments. */ | |
753 | for (last = NULL_TREE; | |
754 | fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last)); | |
755 | fndecl = TREE_CHAIN (fndecl)) | |
756 | /* Output the name of the field (after overloading), as | |
757 | well as the name of the field before overloading, along | |
758 | with its parameter list */ | |
759 | { | |
760 | /* This is the "mangled" name of the method. | |
761 | It encodes the argument types. */ | |
762 | char *debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)); | |
763 | int destructor = 0; | |
764 | ||
765 | CONTIN; | |
766 | ||
767 | last = fndecl; | |
768 | ||
769 | if (DECL_IGNORED_P (fndecl)) | |
770 | continue; | |
771 | ||
772 | if (flag_minimal_debug) | |
773 | { | |
774 | /* Detect ordinary methods because their mangled names | |
775 | start with the operation name. */ | |
776 | if (!strncmp (IDENTIFIER_POINTER (name), debug_name, | |
777 | IDENTIFIER_LENGTH (name))) | |
778 | { | |
779 | debug_name += IDENTIFIER_LENGTH (name); | |
780 | if (debug_name[0] == '_' && debug_name[1] == '_') | |
781 | { | |
782 | char *method_name = debug_name + 2; | |
783 | char *length_ptr = formatted_type_identifier_length; | |
784 | /* Get past const and volatile qualifiers. */ | |
785 | while (*method_name == 'C' || *method_name == 'V') | |
786 | method_name++; | |
787 | /* Skip digits for length of type_encoding. */ | |
788 | while (*method_name == *length_ptr && *length_ptr) | |
789 | length_ptr++, method_name++; | |
790 | if (! strncmp (method_name, | |
791 | IDENTIFIER_POINTER (type_encoding), | |
792 | type_identifier_length)) | |
793 | method_name += type_identifier_length; | |
794 | debug_name = method_name; | |
795 | } | |
796 | } | |
797 | /* Detect constructors by their style of name mangling. */ | |
798 | else if (debug_name[0] == '_' && debug_name[1] == '_') | |
799 | { | |
800 | char *ctor_name = debug_name + 2; | |
801 | char *length_ptr = formatted_type_identifier_length; | |
802 | while (*ctor_name == 'C' || *ctor_name == 'V') | |
803 | ctor_name++; | |
804 | /* Skip digits for length of type_encoding. */ | |
805 | while (*ctor_name == *length_ptr && *length_ptr) | |
806 | length_ptr++, ctor_name++; | |
807 | if (!strncmp (IDENTIFIER_POINTER (type_encoding), ctor_name, | |
808 | type_identifier_length)) | |
809 | debug_name = ctor_name + type_identifier_length; | |
810 | } | |
811 | /* The other alternative is a destructor. */ | |
812 | else | |
813 | destructor = 1; | |
814 | ||
815 | /* Output the operation name just once, for the first method | |
816 | that we output. */ | |
817 | if (need_prefix) | |
818 | { | |
819 | fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name)); | |
820 | CHARS (IDENTIFIER_LENGTH (name) + 2); | |
821 | need_prefix = 0; | |
822 | } | |
823 | } | |
824 | ||
825 | dbxout_type (TREE_TYPE (fndecl), 0, destructor); | |
826 | ||
827 | dbxout_type_method_1 (fndecl, debug_name); | |
828 | } | |
829 | if (!need_prefix) | |
830 | { | |
831 | putc (';', asmfile); | |
832 | CHARS (1); | |
833 | } | |
834 | } | |
835 | } | |
836 | \f | |
837 | /* Output a reference to a type. If the type has not yet been | |
838 | described in the dbx output, output its definition now. | |
839 | For a type already defined, just refer to its definition | |
840 | using the type number. | |
841 | ||
842 | If FULL is nonzero, and the type has been described only with | |
843 | a forward-reference, output the definition now. | |
844 | If FULL is zero in this case, just refer to the forward-reference | |
845 | using the number previously allocated. | |
846 | ||
847 | If SHOW_ARG_TYPES is nonzero, we output a description of the argument | |
848 | types for a METHOD_TYPE. */ | |
849 | ||
850 | static void | |
851 | dbxout_type (type, full, show_arg_types) | |
852 | tree type; | |
853 | int full; | |
854 | int show_arg_types; | |
855 | { | |
856 | register tree tem; | |
857 | static int anonymous_type_number = 0; | |
858 | ||
859 | /* If there was an input error and we don't really have a type, | |
860 | avoid crashing and write something that is at least valid | |
861 | by assuming `int'. */ | |
862 | if (type == error_mark_node) | |
863 | type = integer_type_node; | |
864 | else | |
865 | { | |
866 | type = TYPE_MAIN_VARIANT (type); | |
867 | if (TYPE_NAME (type) | |
868 | && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
869 | && DECL_IGNORED_P (TYPE_NAME (type))) | |
870 | full = 0; | |
871 | } | |
872 | ||
873 | if (TYPE_SYMTAB_ADDRESS (type) == 0) | |
874 | { | |
875 | /* Type has no dbx number assigned. Assign next available number. */ | |
876 | TYPE_SYMTAB_ADDRESS (type) = next_type_number++; | |
877 | ||
878 | /* Make sure type vector is long enough to record about this type. */ | |
879 | ||
880 | if (next_type_number == typevec_len) | |
881 | { | |
882 | typevec = (enum typestatus *) xrealloc (typevec, typevec_len * 2 * sizeof typevec[0]); | |
883 | bzero (typevec + typevec_len, typevec_len * sizeof typevec[0]); | |
884 | typevec_len *= 2; | |
885 | } | |
886 | } | |
887 | ||
888 | /* Output the number of this type, to refer to it. */ | |
889 | fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type)); | |
890 | CHARS (3); | |
891 | ||
892 | #ifdef DBX_TYPE_DEFINED | |
893 | if (DBX_TYPE_DEFINED (type)) | |
894 | return; | |
895 | #endif | |
896 | ||
897 | /* If this type's definition has been output or is now being output, | |
898 | that is all. */ | |
899 | ||
900 | switch (typevec[TYPE_SYMTAB_ADDRESS (type)]) | |
901 | { | |
902 | case TYPE_UNSEEN: | |
903 | break; | |
904 | case TYPE_XREF: | |
905 | /* If we have already had a cross reference, | |
906 | and either that's all we want or that's the best we could do, | |
907 | don't repeat the cross reference. | |
908 | Sun dbx crashes if we do. */ | |
909 | if (! full || TYPE_SIZE (type) == 0 | |
910 | /* No way in DBX fmt to describe a variable size. */ | |
911 | || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST) | |
912 | return; | |
913 | break; | |
914 | case TYPE_DEFINED: | |
915 | return; | |
916 | } | |
917 | ||
918 | #ifdef DBX_NO_XREFS | |
919 | /* For systems where dbx output does not allow the `=xsNAME:' syntax, | |
920 | leave the type-number completely undefined rather than output | |
921 | a cross-reference. */ | |
922 | if (TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE | |
923 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
924 | ||
925 | if ((TYPE_NAME (type) != 0 && !full) | |
926 | || TYPE_SIZE (type) == 0) | |
927 | { | |
928 | typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF; | |
929 | return; | |
930 | } | |
931 | #endif | |
932 | ||
933 | /* Output a definition now. */ | |
934 | ||
935 | fprintf (asmfile, "="); | |
936 | CHARS (1); | |
937 | ||
938 | /* Mark it as defined, so that if it is self-referent | |
939 | we will not get into an infinite recursion of definitions. */ | |
940 | ||
941 | typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED; | |
942 | ||
943 | switch (TREE_CODE (type)) | |
944 | { | |
945 | case VOID_TYPE: | |
946 | case LANG_TYPE: | |
947 | /* For a void type, just define it as itself; ie, "5=5". | |
948 | This makes us consider it defined | |
949 | without saying what it is. The debugger will make it | |
950 | a void type when the reference is seen, and nothing will | |
951 | ever override that default. */ | |
952 | fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type)); | |
953 | CHARS (3); | |
954 | break; | |
955 | ||
956 | case INTEGER_TYPE: | |
957 | if (type == char_type_node && ! TREE_UNSIGNED (type)) | |
958 | /* Output the type `char' as a subrange of itself! | |
959 | I don't understand this definition, just copied it | |
960 | from the output of pcc. | |
961 | This used to use `r2' explicitly and we used to | |
962 | take care to make sure that `char' was type number 2. */ | |
963 | fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type)); | |
964 | #ifdef WINNING_GDB | |
965 | else if (TYPE_PRECISION (type) > BITS_PER_WORD) | |
966 | { | |
967 | /* This used to say `r1' and we used to take care | |
968 | to make sure that `int' was type number 1. */ | |
969 | fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node)); | |
970 | print_int_cst_octal (TYPE_MIN_VALUE (type)); | |
971 | fprintf (asmfile, ";"); | |
972 | print_int_cst_octal (TYPE_MAX_VALUE (type)); | |
973 | fprintf (asmfile, ";"); | |
974 | } | |
975 | #endif | |
976 | else | |
977 | /* Output other integer types as subranges of `int'. */ | |
978 | /* This used to say `r1' and we used to take care | |
979 | to make sure that `int' was type number 1. */ | |
980 | fprintf (asmfile, "r%d;%d;%d;", | |
981 | TYPE_SYMTAB_ADDRESS (integer_type_node), | |
982 | TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)), | |
983 | TREE_INT_CST_LOW (TYPE_MAX_VALUE (type))); | |
984 | CHARS (25); | |
985 | break; | |
986 | ||
987 | case REAL_TYPE: | |
988 | /* This used to say `r1' and we used to take care | |
989 | to make sure that `int' was type number 1. */ | |
990 | fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node), | |
991 | TREE_INT_CST_LOW (size_in_bytes (type))); | |
992 | CHARS (16); | |
993 | break; | |
994 | ||
995 | case CHAR_TYPE: | |
996 | /* Output the type `char' as a subrange of itself. | |
997 | That is what pcc seems to do. */ | |
998 | fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node), | |
999 | TREE_UNSIGNED (type) ? 255 : 127); | |
1000 | CHARS (9); | |
1001 | break; | |
1002 | ||
1003 | case BOOLEAN_TYPE: /* Define as enumeral type (False, True) */ | |
1004 | fprintf (asmfile, "eFalse:0,True:1,;"); | |
1005 | CHARS (17); | |
1006 | break; | |
1007 | ||
1008 | case FILE_TYPE: | |
1009 | putc ('d', asmfile); | |
1010 | CHARS (1); | |
1011 | dbxout_type (TREE_TYPE (type), 0); | |
1012 | break; | |
1013 | ||
1014 | case COMPLEX_TYPE: | |
1015 | /* Differs from the REAL_TYPE by its new data type number */ | |
1016 | ||
1017 | if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) | |
1018 | { | |
1019 | fprintf (asmfile, "r%d;%d;0;", | |
1020 | TYPE_SYMTAB_ADDRESS (type), | |
1021 | TREE_INT_CST_LOW (size_in_bytes (TREE_TYPE (type)))); | |
1022 | CHARS (15); /* The number is propably incorrect here */ | |
1023 | } else | |
1024 | abort (); /* What to do with CSImode complex? */ | |
1025 | break; | |
1026 | ||
1027 | case SET_TYPE: | |
1028 | putc ('S', asmfile); | |
1029 | CHARS (1); | |
1030 | dbxout_type (TREE_TYPE (type), 0); | |
1031 | break; | |
1032 | ||
1033 | case ARRAY_TYPE: | |
1034 | /* Output "a" followed by a range type definition | |
1035 | for the index type of the array | |
1036 | followed by a reference to the target-type. | |
1037 | ar1;0;N;M for an array of type M and size N. */ | |
1038 | /* This used to say `r1' and we used to take care | |
1039 | to make sure that `int' was type number 1. */ | |
1040 | fprintf (asmfile, "ar%d;0;%d;", TYPE_SYMTAB_ADDRESS (integer_type_node), | |
1041 | ||
1042 | (TYPE_DOMAIN (type) | |
1043 | ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) | |
1044 | : -1)); | |
1045 | CHARS (17); | |
1046 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1047 | break; | |
1048 | ||
1049 | case RECORD_TYPE: | |
1050 | case UNION_TYPE: | |
1051 | { | |
1052 | int i, n_baseclasses = 0; | |
1053 | ||
1054 | if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0) | |
1055 | n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type)); | |
1056 | ||
1057 | /* Output a structure type. */ | |
1058 | if ((TYPE_NAME (type) != 0 | |
1059 | #if 0 /* Tiemann says this creates output tha "confuses GDB". | |
1060 | Too bad the info is so vague. Hope this doesn't lose. */ | |
1061 | && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1062 | && DECL_IGNORED_P (TYPE_NAME (type))) | |
1063 | #endif | |
1064 | && !full) | |
1065 | || TYPE_SIZE (type) == 0 | |
1066 | /* No way in DBX fmt to describe a variable size. */ | |
1067 | || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST) | |
1068 | { | |
1069 | /* If the type is just a cross reference, output one | |
1070 | and mark the type as partially described. | |
1071 | If it later becomes defined, we will output | |
1072 | its real definition. | |
1073 | If the type has a name, don't nest its definition within | |
1074 | another type's definition; instead, output an xref | |
1075 | and let the definition come when the name is defined. */ | |
1076 | fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu"); | |
1077 | CHARS (3); | |
1078 | #if 0 /* This assertion is legitimately false in C++. */ | |
1079 | /* We shouldn't be outputting a reference to a type before its | |
1080 | definition unless the type has a tag name. | |
1081 | A typedef name without a tag name should be impossible. */ | |
1082 | if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE) | |
1083 | abort (); | |
1084 | #endif | |
1085 | if (TYPE_NAME (type) != 0) | |
1086 | dbxout_type_name (type); | |
1087 | else | |
1088 | fprintf (asmfile, "$$%d", anonymous_type_number++); | |
1089 | fprintf (asmfile, ":"); | |
1090 | typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF; | |
1091 | break; | |
1092 | } | |
1093 | tem = size_in_bytes (type); | |
1094 | ||
1095 | /* Identify record or union, and print its size. */ | |
1096 | fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d", | |
1097 | TREE_INT_CST_LOW (tem)); | |
1098 | ||
1099 | if (use_gnu_debug_info_extensions) | |
1100 | { | |
1101 | if (n_baseclasses) | |
1102 | { | |
1103 | have_used_extensions = 1; | |
1104 | fprintf (asmfile, "!%d,", n_baseclasses); | |
1105 | CHARS (8); | |
1106 | } | |
1107 | } | |
1108 | for (i = 0; i < n_baseclasses; i++) | |
1109 | { | |
1110 | tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i); | |
1111 | if (use_gnu_debug_info_extensions) | |
1112 | { | |
1113 | have_used_extensions = 1; | |
1114 | putc (TREE_VIA_VIRTUAL (child) ? '1' | |
1115 | : '0', | |
1116 | asmfile); | |
1117 | putc (TREE_VIA_PUBLIC (child) ? '2' | |
1118 | : '0', | |
1119 | asmfile); | |
1120 | fprintf (asmfile, "%d,", | |
1121 | TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT); | |
1122 | CHARS (15); | |
1123 | dbxout_type (BINFO_TYPE (child), 0, 0); | |
1124 | putc (';', asmfile); | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | /* Print out the base class information with fields | |
1129 | which have the same names at the types they hold. */ | |
1130 | dbxout_type_name (BINFO_TYPE (child)); | |
1131 | putc (':', asmfile); | |
1132 | dbxout_type (BINFO_TYPE (child), full, 0); | |
1133 | fprintf (asmfile, ",%d,%d;", | |
1134 | TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT, | |
1135 | TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT); | |
1136 | CHARS (20); | |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | CHARS (11); | |
1142 | ||
1143 | /* Write out the field declarations. */ | |
1144 | dbxout_type_fields (type); | |
1145 | if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE) | |
1146 | { | |
1147 | have_used_extensions = 1; | |
1148 | dbxout_type_methods (type); | |
1149 | } | |
1150 | putc (';', asmfile); | |
1151 | ||
1152 | if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE | |
1153 | /* Avoid the ~ if we don't really need it--it confuses dbx. */ | |
1154 | && TYPE_VFIELD (type)) | |
1155 | { | |
1156 | have_used_extensions = 1; | |
1157 | ||
1158 | /* Tell GDB+ that it may keep reading. */ | |
1159 | putc ('~', asmfile); | |
1160 | ||
1161 | /* We need to write out info about what field this class | |
1162 | uses as its "main" vtable pointer field, because if this | |
1163 | field is inherited from a base class, GDB cannot necessarily | |
1164 | figure out which field it's using in time. */ | |
1165 | if (TYPE_VFIELD (type)) | |
1166 | { | |
1167 | putc ('%', asmfile); | |
1168 | dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0); | |
1169 | } | |
1170 | putc (';', asmfile); | |
1171 | CHARS (3); | |
1172 | } | |
1173 | break; | |
1174 | ||
1175 | case ENUMERAL_TYPE: | |
1176 | if ((TYPE_NAME (type) != 0 && !full | |
1177 | && (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
1178 | && ! DECL_IGNORED_P (TYPE_NAME (type)))) | |
1179 | || TYPE_SIZE (type) == 0) | |
1180 | { | |
1181 | fprintf (asmfile, "xe"); | |
1182 | CHARS (3); | |
1183 | dbxout_type_name (type); | |
1184 | typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF; | |
1185 | fprintf (asmfile, ":"); | |
1186 | return; | |
1187 | } | |
1188 | #ifdef DBX_OUTPUT_ENUM | |
1189 | DBX_OUTPUT_ENUM (asmfile, type); | |
1190 | #else | |
1191 | putc ('e', asmfile); | |
1192 | CHARS (1); | |
1193 | for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem)) | |
1194 | { | |
1195 | fprintf (asmfile, "%s:%d,", IDENTIFIER_POINTER (TREE_PURPOSE (tem)), | |
1196 | TREE_INT_CST_LOW (TREE_VALUE (tem))); | |
1197 | CHARS (11 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem))); | |
1198 | if (TREE_CHAIN (tem) != 0) | |
1199 | CONTIN; | |
1200 | } | |
1201 | putc (';', asmfile); | |
1202 | CHARS (1); | |
1203 | #endif | |
1204 | break; | |
1205 | ||
1206 | case POINTER_TYPE: | |
1207 | putc ('*', asmfile); | |
1208 | CHARS (1); | |
1209 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1210 | break; | |
1211 | ||
1212 | case METHOD_TYPE: | |
1213 | if (use_gnu_debug_info_extensions) | |
1214 | { | |
1215 | have_used_extensions = 1; | |
1216 | putc ('#', asmfile); | |
1217 | CHARS (1); | |
1218 | if (flag_minimal_debug && !show_arg_types) | |
1219 | { | |
1220 | /* Normally, just output the return type. | |
1221 | The argument types are encoded in the method name. */ | |
1222 | putc ('#', asmfile); | |
1223 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1224 | putc (';', asmfile); | |
1225 | CHARS (1); | |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | /* When outputting destructors, we need to write | |
1230 | the argument types out longhand. */ | |
1231 | dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0); | |
1232 | putc (',', asmfile); | |
1233 | CHARS (1); | |
1234 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1235 | dbxout_args (TYPE_ARG_TYPES (type)); | |
1236 | putc (';', asmfile); | |
1237 | CHARS (1); | |
1238 | } | |
1239 | } | |
1240 | else | |
1241 | { | |
1242 | /* Treat it as a function type. */ | |
1243 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1244 | } | |
1245 | break; | |
1246 | ||
1247 | case OFFSET_TYPE: | |
1248 | if (use_gnu_debug_info_extensions) | |
1249 | { | |
1250 | have_used_extensions = 1; | |
1251 | putc ('@', asmfile); | |
1252 | CHARS (1); | |
1253 | dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0); | |
1254 | putc (',', asmfile); | |
1255 | CHARS (1); | |
1256 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | /* Should print as an int, because it is really | |
1261 | just an offset. */ | |
1262 | dbxout_type (integer_type_node, 0, 0); | |
1263 | } | |
1264 | break; | |
1265 | ||
1266 | case REFERENCE_TYPE: | |
1267 | if (use_gnu_debug_info_extensions) | |
1268 | have_used_extensions = 1; | |
1269 | putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile); | |
1270 | CHARS (1); | |
1271 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1272 | break; | |
1273 | ||
1274 | case FUNCTION_TYPE: | |
1275 | putc ('f', asmfile); | |
1276 | CHARS (1); | |
1277 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1278 | break; | |
1279 | ||
1280 | default: | |
1281 | abort (); | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | /* Print the value of integer constant C, in octal, | |
1286 | handling double precision. */ | |
1287 | ||
1288 | static void | |
1289 | print_int_cst_octal (c) | |
1290 | tree c; | |
1291 | { | |
1292 | unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c); | |
1293 | unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c); | |
1294 | int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3)); | |
1295 | ||
1296 | fprintf (asmfile, "0"); | |
1297 | ||
1298 | if (excess == 3) | |
1299 | { | |
1300 | print_octal (high, HOST_BITS_PER_WIDE_INT / 3); | |
1301 | print_octal (low, HOST_BITS_PER_WIDE_INT / 3); | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | unsigned HOST_WIDE_INT beg = high >> excess; | |
1306 | unsigned HOST_WIDE_INT middle | |
1307 | = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess) | |
1308 | | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3))); | |
1309 | unsigned HOST_WIDE_INT end | |
1310 | = low & (((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 3 * 3)) - 1); | |
1311 | fprintf (asmfile, "%o%01o", beg, middle); | |
1312 | print_octal (end, HOST_BITS_PER_WIDE_INT / 3); | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | static void | |
1317 | print_octal (value, digits) | |
1318 | unsigned HOST_WIDE_INT value; | |
1319 | int digits; | |
1320 | { | |
1321 | int i; | |
1322 | ||
1323 | for (i = digits - 1; i >= 0; i--) | |
1324 | fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7)); | |
1325 | } | |
1326 | ||
1327 | /* Output the name of type TYPE, with no punctuation. | |
1328 | Such names can be set up either by typedef declarations | |
1329 | or by struct, enum and union tags. */ | |
1330 | ||
1331 | static void | |
1332 | dbxout_type_name (type) | |
1333 | register tree type; | |
1334 | { | |
1335 | tree t; | |
1336 | if (TYPE_NAME (type) == 0) | |
1337 | abort (); | |
1338 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
1339 | { | |
1340 | t = TYPE_NAME (type); | |
1341 | } | |
1342 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL) | |
1343 | { | |
1344 | t = DECL_NAME (TYPE_NAME (type)); | |
1345 | } | |
1346 | else | |
1347 | abort (); | |
1348 | ||
1349 | fprintf (asmfile, "%s", IDENTIFIER_POINTER (t)); | |
1350 | CHARS (IDENTIFIER_LENGTH (t)); | |
1351 | } | |
1352 | \f | |
1353 | /* Output a .stabs for the symbol defined by DECL, | |
1354 | which must be a ..._DECL node in the normal namespace. | |
1355 | It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL. | |
1356 | LOCAL is nonzero if the scope is less than the entire file. */ | |
1357 | ||
1358 | void | |
1359 | dbxout_symbol (decl, local) | |
1360 | tree decl; | |
1361 | int local; | |
1362 | { | |
1363 | int letter = 0; | |
1364 | tree type = TREE_TYPE (decl); | |
1365 | tree context = NULL_TREE; | |
1366 | int regno = -1; | |
1367 | ||
1368 | /* Cast avoids warning in old compilers. */ | |
1369 | current_sym_code = (STAB_CODE_TYPE) 0; | |
1370 | current_sym_value = 0; | |
1371 | current_sym_addr = 0; | |
1372 | ||
1373 | /* Ignore nameless syms, but don't ignore type tags. */ | |
1374 | ||
1375 | if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL) | |
1376 | || DECL_IGNORED_P (decl)) | |
1377 | return; | |
1378 | ||
1379 | dbxout_prepare_symbol (decl); | |
1380 | ||
1381 | /* The output will always start with the symbol name, | |
1382 | so always count that in the length-output-so-far. */ | |
1383 | ||
1384 | if (DECL_NAME (decl) != 0) | |
1385 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl)); | |
1386 | ||
1387 | switch (TREE_CODE (decl)) | |
1388 | { | |
1389 | case CONST_DECL: | |
1390 | /* Enum values are defined by defining the enum type. */ | |
1391 | break; | |
1392 | ||
1393 | case FUNCTION_DECL: | |
1394 | if (DECL_RTL (decl) == 0) | |
1395 | return; | |
1396 | if (DECL_EXTERNAL (decl)) | |
1397 | break; | |
1398 | /* Don't mention a nested function under its parent. */ | |
1399 | context = decl_function_context (decl); | |
1400 | if (context == current_function_decl) | |
1401 | break; | |
1402 | if (GET_CODE (DECL_RTL (decl)) != MEM | |
1403 | || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
1404 | break; | |
1405 | FORCE_TEXT; | |
1406 | ||
1407 | fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP, | |
1408 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), | |
1409 | TREE_PUBLIC (decl) ? 'F' : 'f'); | |
1410 | ||
1411 | current_sym_code = N_FUN; | |
1412 | current_sym_addr = XEXP (DECL_RTL (decl), 0); | |
1413 | ||
1414 | if (TREE_TYPE (type)) | |
1415 | dbxout_type (TREE_TYPE (type), 0, 0); | |
1416 | else | |
1417 | dbxout_type (void_type_node, 0, 0); | |
1418 | ||
1419 | /* For a nested function, when that function is compiled, | |
1420 | mention the containing function name | |
1421 | as well as (since dbx wants it) our own assembler-name. */ | |
1422 | if (context != 0) | |
1423 | fprintf (asmfile, ",%s,%s", | |
1424 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), | |
1425 | IDENTIFIER_POINTER (DECL_NAME (context))); | |
1426 | ||
1427 | dbxout_finish_symbol (decl); | |
1428 | break; | |
1429 | ||
1430 | case TYPE_DECL: | |
1431 | #if 0 | |
1432 | /* This seems all wrong. Outputting most kinds of types gives no name | |
1433 | at all. A true definition gives no name; a cross-ref for a | |
1434 | structure can give the tag name, but not a type name. | |
1435 | It seems that no typedef name is defined by outputting a type. */ | |
1436 | ||
1437 | /* If this typedef name was defined by outputting the type, | |
1438 | don't duplicate it. */ | |
1439 | if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED | |
1440 | && TYPE_NAME (TREE_TYPE (decl)) == decl) | |
1441 | return; | |
1442 | #endif | |
1443 | /* Don't output the same typedef twice. | |
1444 | And don't output what language-specific stuff doesn't want output. */ | |
1445 | if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl)) | |
1446 | return; | |
1447 | ||
1448 | FORCE_TEXT; | |
1449 | ||
1450 | { | |
1451 | int tag_needed = 1; | |
1452 | int did_output = 0; | |
1453 | ||
1454 | if (DECL_NAME (decl)) | |
1455 | { | |
1456 | /* Nonzero means we must output a tag as well as a typedef. */ | |
1457 | tag_needed = 0; | |
1458 | ||
1459 | /* Handle the case of a C++ structure or union | |
1460 | where the TYPE_NAME is a TYPE_DECL | |
1461 | which gives both a typedef name and a tag. */ | |
1462 | /* dbx requires the tag first and the typedef second. */ | |
1463 | if ((TREE_CODE (type) == RECORD_TYPE | |
1464 | || TREE_CODE (type) == UNION_TYPE) | |
1465 | && TYPE_NAME (type) == decl | |
1466 | && !(use_gnu_debug_info_extensions && have_used_extensions) | |
1467 | && !TREE_ASM_WRITTEN (TYPE_NAME (type)) | |
1468 | /* Distinguish the implicit typedefs of C++ | |
1469 | from explicit ones that might be found in C. */ | |
1470 | && DECL_SOURCE_LINE (decl) == 0) | |
1471 | { | |
1472 | tree name = TYPE_NAME (type); | |
1473 | if (TREE_CODE (name) == TYPE_DECL) | |
1474 | name = DECL_NAME (name); | |
1475 | ||
1476 | current_sym_code = DBX_TYPE_DECL_STABS_CODE; | |
1477 | current_sym_value = 0; | |
1478 | current_sym_addr = 0; | |
1479 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (name); | |
1480 | ||
1481 | fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP, | |
1482 | IDENTIFIER_POINTER (name)); | |
1483 | dbxout_type (type, 1, 0); | |
1484 | dbxout_finish_symbol (NULL_TREE); | |
1485 | } | |
1486 | ||
1487 | /* Output typedef name. */ | |
1488 | fprintf (asmfile, "%s \"%s:", ASM_STABS_OP, | |
1489 | IDENTIFIER_POINTER (DECL_NAME (decl))); | |
1490 | ||
1491 | /* Short cut way to output a tag also. */ | |
1492 | if ((TREE_CODE (type) == RECORD_TYPE | |
1493 | || TREE_CODE (type) == UNION_TYPE) | |
1494 | && TYPE_NAME (type) == decl) | |
1495 | { | |
1496 | if (use_gnu_debug_info_extensions && have_used_extensions) | |
1497 | { | |
1498 | putc ('T', asmfile); | |
1499 | TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1; | |
1500 | } | |
1501 | #if 0 /* Now we generate the tag for this case up above. */ | |
1502 | else | |
1503 | tag_needed = 1; | |
1504 | #endif | |
1505 | } | |
1506 | ||
1507 | putc ('t', asmfile); | |
1508 | current_sym_code = DBX_TYPE_DECL_STABS_CODE; | |
1509 | ||
1510 | dbxout_type (type, 1, 0); | |
1511 | dbxout_finish_symbol (decl); | |
1512 | did_output = 1; | |
1513 | } | |
1514 | ||
1515 | if (tag_needed && TYPE_NAME (type) != 0 | |
1516 | && !TREE_ASM_WRITTEN (TYPE_NAME (type))) | |
1517 | { | |
1518 | /* For a TYPE_DECL with no name, but the type has a name, | |
1519 | output a tag. | |
1520 | This is what represents `struct foo' with no typedef. */ | |
1521 | /* In C++, the name of a type is the corresponding typedef. | |
1522 | In C, it is an IDENTIFIER_NODE. */ | |
1523 | tree name = TYPE_NAME (type); | |
1524 | if (TREE_CODE (name) == TYPE_DECL) | |
1525 | name = DECL_NAME (name); | |
1526 | ||
1527 | current_sym_code = DBX_TYPE_DECL_STABS_CODE; | |
1528 | current_sym_value = 0; | |
1529 | current_sym_addr = 0; | |
1530 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (name); | |
1531 | ||
1532 | fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP, | |
1533 | IDENTIFIER_POINTER (name)); | |
1534 | dbxout_type (type, 1, 0); | |
1535 | dbxout_finish_symbol (NULL_TREE); | |
1536 | did_output = 1; | |
1537 | } | |
1538 | ||
1539 | /* If an enum type has no name, it cannot be referred to, | |
1540 | but we must output it anyway, since the enumeration constants | |
1541 | can be referred to. */ | |
1542 | if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE) | |
1543 | { | |
1544 | current_sym_code = DBX_TYPE_DECL_STABS_CODE; | |
1545 | current_sym_value = 0; | |
1546 | current_sym_addr = 0; | |
1547 | current_sym_nchars = 2; | |
1548 | ||
1549 | /* Some debuggers fail when given NULL names, so give this a | |
1550 | harmless name of ` '. */ | |
1551 | fprintf (asmfile, "%s \" :T", ASM_STABS_OP); | |
1552 | dbxout_type (type, 1, 0); | |
1553 | dbxout_finish_symbol (NULL_TREE); | |
1554 | } | |
1555 | ||
1556 | /* Prevent duplicate output of a typedef. */ | |
1557 | TREE_ASM_WRITTEN (decl) = 1; | |
1558 | break; | |
1559 | } | |
1560 | ||
1561 | case PARM_DECL: | |
1562 | /* Parm decls go in their own separate chains | |
1563 | and are output by dbxout_reg_parms and dbxout_parms. */ | |
1564 | abort (); | |
1565 | ||
1566 | case RESULT_DECL: | |
1567 | /* Named return value, treat like a VAR_DECL. */ | |
1568 | case VAR_DECL: | |
1569 | if (DECL_RTL (decl) == 0) | |
1570 | return; | |
1571 | /* Don't mention a variable that is external. | |
1572 | Let the file that defines it describe it. */ | |
1573 | if (DECL_EXTERNAL (decl)) | |
1574 | break; | |
1575 | ||
1576 | /* If the variable is really a constant | |
1577 | and not written in memory, inform the debugger. */ | |
1578 | if (TREE_STATIC (decl) && TREE_READONLY (decl) | |
1579 | && DECL_INITIAL (decl) != 0 | |
1580 | && ! TREE_ASM_WRITTEN (decl) | |
1581 | && (DECL_FIELD_CONTEXT (decl) == NULL_TREE | |
1582 | || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK)) | |
1583 | { | |
1584 | if (TREE_PUBLIC (decl) == 0) | |
1585 | { | |
1586 | /* The sun4 assembler does not grok this. */ | |
1587 | char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
1588 | if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE | |
1589 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
1590 | { | |
1591 | HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl)); | |
1592 | #ifdef DBX_OUTPUT_CONSTANT_SYMBOL | |
1593 | DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival); | |
1594 | #else | |
1595 | fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n", | |
1596 | ASM_STABS_OP, name, ival, N_LSYM); | |
1597 | #endif | |
1598 | return; | |
1599 | } | |
1600 | else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE) | |
1601 | { | |
1602 | /* don't know how to do this yet. */ | |
1603 | } | |
1604 | break; | |
1605 | } | |
1606 | /* else it is something we handle like a normal variable. */ | |
1607 | } | |
1608 | ||
1609 | DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, 0); | |
1610 | #ifdef LEAF_REG_REMAP | |
1611 | if (leaf_function) | |
1612 | leaf_renumber_regs_insn (DECL_RTL (decl)); | |
1613 | #endif | |
1614 | ||
1615 | /* Don't mention a variable at all | |
1616 | if it was completely optimized into nothingness. | |
1617 | ||
1618 | If DECL was from an inline function, then it's rtl | |
1619 | is not identically the rtl that was used in this | |
1620 | particular compilation. */ | |
1621 | if (GET_CODE (DECL_RTL (decl)) == REG) | |
1622 | { | |
1623 | regno = REGNO (DECL_RTL (decl)); | |
1624 | if (regno >= FIRST_PSEUDO_REGISTER) | |
1625 | return; | |
1626 | } | |
1627 | else if (GET_CODE (DECL_RTL (decl)) == SUBREG) | |
1628 | { | |
1629 | rtx value = DECL_RTL (decl); | |
1630 | int offset = 0; | |
1631 | while (GET_CODE (value) == SUBREG) | |
1632 | { | |
1633 | offset += SUBREG_WORD (value); | |
1634 | value = SUBREG_REG (value); | |
1635 | } | |
1636 | if (GET_CODE (value) == REG) | |
1637 | { | |
1638 | regno = REGNO (value); | |
1639 | if (regno >= FIRST_PSEUDO_REGISTER) | |
1640 | return; | |
1641 | regno += offset; | |
1642 | } | |
1643 | alter_subreg (DECL_RTL (decl)); | |
1644 | } | |
1645 | ||
1646 | /* The kind-of-variable letter depends on where | |
1647 | the variable is and on the scope of its name: | |
1648 | G and N_GSYM for static storage and global scope, | |
1649 | S for static storage and file scope, | |
1650 | V for static storage and local scope, | |
1651 | for those two, use N_LCSYM if data is in bss segment, | |
1652 | N_STSYM if in data segment, N_FUN otherwise. | |
1653 | (We used N_FUN originally, then changed to N_STSYM | |
1654 | to please GDB. However, it seems that confused ld. | |
1655 | Now GDB has been fixed to like N_FUN, says Kingdon.) | |
1656 | no letter at all, and N_LSYM, for auto variable, | |
1657 | r and N_RSYM for register variable. */ | |
1658 | ||
1659 | if (GET_CODE (DECL_RTL (decl)) == MEM | |
1660 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == SYMBOL_REF) | |
1661 | { | |
1662 | if (TREE_PUBLIC (decl)) | |
1663 | { | |
1664 | letter = 'G'; | |
1665 | current_sym_code = N_GSYM; | |
1666 | } | |
1667 | else | |
1668 | { | |
1669 | current_sym_addr = XEXP (DECL_RTL (decl), 0); | |
1670 | ||
1671 | letter = decl_function_context (decl) ? 'V' : 'S'; | |
1672 | ||
1673 | if (!DECL_INITIAL (decl)) | |
1674 | current_sym_code = N_LCSYM; | |
1675 | else if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl)) | |
1676 | /* This is not quite right, but it's the closest | |
1677 | of all the codes that Unix defines. */ | |
1678 | current_sym_code = DBX_STATIC_CONST_VAR_CODE; | |
1679 | else | |
1680 | { | |
1681 | /* Ultrix `as' seems to need this. */ | |
1682 | #ifdef DBX_STATIC_STAB_DATA_SECTION | |
1683 | data_section (); | |
1684 | #endif | |
1685 | current_sym_code = N_STSYM; | |
1686 | } | |
1687 | } | |
1688 | } | |
1689 | else if (regno >= 0) | |
1690 | { | |
1691 | letter = 'r'; | |
1692 | current_sym_code = N_RSYM; | |
1693 | current_sym_value = DBX_REGISTER_NUMBER (regno); | |
1694 | } | |
1695 | else if (GET_CODE (DECL_RTL (decl)) == MEM | |
1696 | && (GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM | |
1697 | || (GET_CODE (XEXP (DECL_RTL (decl), 0)) == REG | |
1698 | && REGNO (XEXP (DECL_RTL (decl), 0)) != FRAME_POINTER_REGNUM))) | |
1699 | /* If the value is indirect by memory or by a register | |
1700 | that isn't the frame pointer | |
1701 | then it means the object is variable-sized and address through | |
1702 | that register or stack slot. DBX has no way to represent this | |
1703 | so all we can do is output the variable as a pointer. | |
1704 | If it's not a parameter, ignore it. | |
1705 | (VAR_DECLs like this can be made by integrate.c.) */ | |
1706 | { | |
1707 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) == REG) | |
1708 | { | |
1709 | letter = 'r'; | |
1710 | current_sym_code = N_RSYM; | |
1711 | current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (DECL_RTL (decl), 0))); | |
1712 | } | |
1713 | else | |
1714 | { | |
1715 | current_sym_code = N_LSYM; | |
1716 | /* DECL_RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))). | |
1717 | We want the value of that CONST_INT. */ | |
1718 | current_sym_value | |
1719 | = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (DECL_RTL (decl), 0), 0)); | |
1720 | } | |
1721 | ||
1722 | /* Effectively do build_pointer_type, but don't cache this type, | |
1723 | since it might be temporary whereas the type it points to | |
1724 | might have been saved for inlining. */ | |
1725 | /* Don't use REFERENCE_TYPE because dbx can't handle that. */ | |
1726 | type = make_node (POINTER_TYPE); | |
1727 | TREE_TYPE (type) = TREE_TYPE (decl); | |
1728 | } | |
1729 | else if (GET_CODE (DECL_RTL (decl)) == MEM | |
1730 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == REG) | |
1731 | { | |
1732 | current_sym_code = N_LSYM; | |
1733 | current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (DECL_RTL (decl), 0)); | |
1734 | } | |
1735 | else if (GET_CODE (DECL_RTL (decl)) == MEM | |
1736 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == PLUS | |
1737 | && GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 1)) == CONST_INT) | |
1738 | { | |
1739 | current_sym_code = N_LSYM; | |
1740 | /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))) | |
1741 | We want the value of that CONST_INT. */ | |
1742 | current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (DECL_RTL (decl), 0)); | |
1743 | } | |
1744 | else if (GET_CODE (DECL_RTL (decl)) == MEM | |
1745 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == CONST) | |
1746 | { | |
1747 | /* Handle an obscure case which can arise when optimizing and | |
1748 | when there are few available registers. (This is *always* | |
1749 | the case for i386/i486 targets). The DECL_RTL looks like | |
1750 | (MEM (CONST ...)) even though this variable is a local `auto' | |
1751 | or a local `register' variable. In effect, what has happened | |
1752 | is that the reload pass has seen that all assignments and | |
1753 | references for one such a local variable can be replaced by | |
1754 | equivalent assignments and references to some static storage | |
1755 | variable, thereby avoiding the need for a register. In such | |
1756 | cases we're forced to lie to debuggers and tell them that | |
1757 | this variable was itself `static'. */ | |
1758 | current_sym_code = N_LCSYM; | |
1759 | letter = 'V'; | |
1760 | current_sym_addr = XEXP (XEXP (DECL_RTL (decl), 0), 0); | |
1761 | } | |
1762 | else | |
1763 | /* Address might be a MEM, when DECL is a variable-sized object. | |
1764 | Or it might be const0_rtx, meaning previous passes | |
1765 | want us to ignore this variable. */ | |
1766 | break; | |
1767 | ||
1768 | /* Ok, start a symtab entry and output the variable name. */ | |
1769 | FORCE_TEXT; | |
1770 | ||
1771 | #ifdef DBX_STATIC_BLOCK_START | |
1772 | DBX_STATIC_BLOCK_START (asmfile, current_sym_code); | |
1773 | #endif | |
1774 | ||
1775 | /* One slight hitch: if this is a VAR_DECL which is a static | |
1776 | class member, we must put out the mangled name instead of the | |
1777 | DECL_NAME. */ | |
1778 | { | |
1779 | char *name; | |
1780 | /* Note also that static member (variable) names DO NOT begin | |
1781 | with underscores in .stabs directives. */ | |
1782 | if (DECL_LANG_SPECIFIC (decl)) | |
1783 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
1784 | else | |
1785 | name = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
1786 | fprintf (asmfile, "%s \"%s:", ASM_STABS_OP, name); | |
1787 | } | |
1788 | if (letter) putc (letter, asmfile); | |
1789 | dbxout_type (type, 0, 0); | |
1790 | dbxout_finish_symbol (decl); | |
1791 | ||
1792 | #ifdef DBX_STATIC_BLOCK_END | |
1793 | DBX_STATIC_BLOCK_END (asmfile, current_sym_code); | |
1794 | #endif | |
1795 | break; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | static void | |
1800 | dbxout_prepare_symbol (decl) | |
1801 | tree decl; | |
1802 | { | |
1803 | #ifdef WINNING_GDB | |
1804 | char *filename = DECL_SOURCE_FILE (decl); | |
1805 | ||
1806 | dbxout_source_file (asmfile, filename); | |
1807 | #endif | |
1808 | } | |
1809 | ||
1810 | static void | |
1811 | dbxout_finish_symbol (sym) | |
1812 | tree sym; | |
1813 | { | |
1814 | #ifdef DBX_FINISH_SYMBOL | |
1815 | DBX_FINISH_SYMBOL (sym); | |
1816 | #else | |
1817 | int line = 0; | |
1818 | #ifdef WINNING_GDB | |
1819 | if (sym != 0) | |
1820 | line = DECL_SOURCE_LINE (sym); | |
1821 | #endif | |
1822 | ||
1823 | fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line); | |
1824 | if (current_sym_addr) | |
1825 | output_addr_const (asmfile, current_sym_addr); | |
1826 | else | |
1827 | fprintf (asmfile, "%d", current_sym_value); | |
1828 | putc ('\n', asmfile); | |
1829 | #endif | |
1830 | } | |
1831 | ||
1832 | /* Output definitions of all the decls in a chain. */ | |
1833 | ||
1834 | void | |
1835 | dbxout_syms (syms) | |
1836 | tree syms; | |
1837 | { | |
1838 | while (syms) | |
1839 | { | |
1840 | dbxout_symbol (syms, 1); | |
1841 | syms = TREE_CHAIN (syms); | |
1842 | } | |
1843 | } | |
1844 | \f | |
1845 | /* The following two functions output definitions of function parameters. | |
1846 | Each parameter gets a definition locating it in the parameter list. | |
1847 | Each parameter that is a register variable gets a second definition | |
1848 | locating it in the register. | |
1849 | ||
1850 | Printing or argument lists in gdb uses the definitions that | |
1851 | locate in the parameter list. But reference to the variable in | |
1852 | expressions uses preferentially the definition as a register. */ | |
1853 | ||
1854 | /* Output definitions, referring to storage in the parmlist, | |
1855 | of all the parms in PARMS, which is a chain of PARM_DECL nodes. */ | |
1856 | ||
1857 | void | |
1858 | dbxout_parms (parms) | |
1859 | tree parms; | |
1860 | { | |
1861 | for (; parms; parms = TREE_CHAIN (parms)) | |
1862 | if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node) | |
1863 | { | |
1864 | dbxout_prepare_symbol (parms); | |
1865 | ||
1866 | /* Perform any necessary register eliminations on the parameter's rtl, | |
1867 | so that the debugging output will be accurate. */ | |
1868 | DECL_INCOMING_RTL (parms) | |
1869 | = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX); | |
1870 | DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX); | |
1871 | #ifdef LEAF_REG_REMAP | |
1872 | if (leaf_function) | |
1873 | { | |
1874 | leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms)); | |
1875 | leaf_renumber_regs_insn (DECL_RTL (parms)); | |
1876 | } | |
1877 | #endif | |
1878 | ||
1879 | if (PARM_PASSED_IN_MEMORY (parms)) | |
1880 | { | |
1881 | rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0); | |
1882 | ||
1883 | /* ??? Here we assume that the parm address is indexed | |
1884 | off the frame pointer or arg pointer. | |
1885 | If that is not true, we produce meaningless results, | |
1886 | but do not crash. */ | |
1887 | if (GET_CODE (addr) == PLUS | |
1888 | && GET_CODE (XEXP (addr, 1)) == CONST_INT) | |
1889 | current_sym_value = INTVAL (XEXP (addr, 1)); | |
1890 | else | |
1891 | current_sym_value = 0; | |
1892 | ||
1893 | current_sym_code = N_PSYM; | |
1894 | current_sym_addr = 0; | |
1895 | ||
1896 | FORCE_TEXT; | |
1897 | if (DECL_NAME (parms)) | |
1898 | { | |
1899 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms)); | |
1900 | ||
1901 | fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP, | |
1902 | IDENTIFIER_POINTER (DECL_NAME (parms)), | |
1903 | DBX_MEMPARM_STABS_LETTER); | |
1904 | } | |
1905 | else | |
1906 | { | |
1907 | current_sym_nchars = 8; | |
1908 | fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP, | |
1909 | DBX_MEMPARM_STABS_LETTER); | |
1910 | } | |
1911 | ||
1912 | if (GET_CODE (DECL_RTL (parms)) == REG | |
1913 | && REGNO (DECL_RTL (parms)) >= 0 | |
1914 | && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER) | |
1915 | dbxout_type (DECL_ARG_TYPE (parms), 0, 0); | |
1916 | else | |
1917 | { | |
1918 | int original_value = current_sym_value; | |
1919 | ||
1920 | /* This is the case where the parm is passed as an int or double | |
1921 | and it is converted to a char, short or float and stored back | |
1922 | in the parmlist. In this case, describe the parm | |
1923 | with the variable's declared type, and adjust the address | |
1924 | if the least significant bytes (which we are using) are not | |
1925 | the first ones. */ | |
1926 | #if BYTES_BIG_ENDIAN | |
1927 | if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms)) | |
1928 | current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms))) | |
1929 | - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms)))); | |
1930 | #endif | |
1931 | ||
1932 | if (GET_CODE (DECL_RTL (parms)) == MEM | |
1933 | && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS | |
1934 | && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT | |
1935 | && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value) | |
1936 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
1937 | else | |
1938 | { | |
1939 | current_sym_value = original_value; | |
1940 | dbxout_type (DECL_ARG_TYPE (parms), 0, 0); | |
1941 | } | |
1942 | } | |
1943 | current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr); | |
1944 | dbxout_finish_symbol (parms); | |
1945 | } | |
1946 | else if (GET_CODE (DECL_RTL (parms)) == REG) | |
1947 | { | |
1948 | rtx best_rtl; | |
1949 | char regparm_letter; | |
1950 | /* Parm passed in registers and lives in registers or nowhere. */ | |
1951 | ||
1952 | current_sym_code = DBX_REGPARM_STABS_CODE; | |
1953 | regparm_letter = DBX_REGPARM_STABS_LETTER; | |
1954 | current_sym_addr = 0; | |
1955 | ||
1956 | /* If parm lives in a register, use that register; | |
1957 | pretend the parm was passed there. It would be more consistent | |
1958 | to describe the register where the parm was passed, | |
1959 | but in practice that register usually holds something else. */ | |
1960 | if (REGNO (DECL_RTL (parms)) >= 0 | |
1961 | && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER) | |
1962 | best_rtl = DECL_RTL (parms); | |
1963 | /* If the parm lives nowhere, | |
1964 | use the register where it was passed. */ | |
1965 | else | |
1966 | best_rtl = DECL_INCOMING_RTL (parms); | |
1967 | current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl)); | |
1968 | ||
1969 | FORCE_TEXT; | |
1970 | if (DECL_NAME (parms)) | |
1971 | { | |
1972 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms)); | |
1973 | fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP, | |
1974 | IDENTIFIER_POINTER (DECL_NAME (parms)), | |
1975 | regparm_letter); | |
1976 | } | |
1977 | else | |
1978 | { | |
1979 | current_sym_nchars = 8; | |
1980 | fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP, | |
1981 | regparm_letter); | |
1982 | } | |
1983 | ||
1984 | dbxout_type (DECL_ARG_TYPE (parms), 0, 0); | |
1985 | dbxout_finish_symbol (parms); | |
1986 | } | |
1987 | else if (GET_CODE (DECL_RTL (parms)) == MEM | |
1988 | && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG) | |
1989 | /* && rtx_equal_p (XEXP (DECL_RTL (parms), 0), | |
1990 | DECL_INCOMING_RTL (parms))) */ | |
1991 | { | |
1992 | /* Parm was passed via invisible reference. | |
1993 | That is, its address was passed in a register. | |
1994 | Output it as if it lived in that register. | |
1995 | The debugger will know from the type | |
1996 | that it was actually passed by invisible reference. */ | |
1997 | ||
1998 | char regparm_letter; | |
1999 | /* Parm passed in registers and lives in registers or nowhere. */ | |
2000 | ||
2001 | current_sym_code = DBX_REGPARM_STABS_CODE; | |
2002 | regparm_letter = DBX_REGPARM_STABS_LETTER; | |
2003 | ||
2004 | /* DECL_RTL looks like (MEM (REG...). Get the register number. */ | |
2005 | current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0)); | |
2006 | current_sym_addr = 0; | |
2007 | ||
2008 | FORCE_TEXT; | |
2009 | if (DECL_NAME (parms)) | |
2010 | { | |
2011 | current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2012 | ||
2013 | fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP, | |
2014 | IDENTIFIER_POINTER (DECL_NAME (parms)), | |
2015 | DBX_REGPARM_STABS_LETTER); | |
2016 | } | |
2017 | else | |
2018 | { | |
2019 | current_sym_nchars = 8; | |
2020 | fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP, | |
2021 | DBX_REGPARM_STABS_LETTER); | |
2022 | } | |
2023 | ||
2024 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
2025 | dbxout_finish_symbol (parms); | |
2026 | } | |
2027 | else if (GET_CODE (DECL_RTL (parms)) == MEM | |
2028 | && XEXP (DECL_RTL (parms), 0) != const0_rtx) | |
2029 | { | |
2030 | /* Parm was passed in registers but lives on the stack. */ | |
2031 | ||
2032 | current_sym_code = N_PSYM; | |
2033 | /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))), | |
2034 | in which case we want the value of that CONST_INT, | |
2035 | or (MEM (REG ...)) or (MEM (MEM ...)), | |
2036 | in which case we use a value of zero. */ | |
2037 | if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG | |
2038 | || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM) | |
2039 | current_sym_value = 0; | |
2040 | else | |
2041 | current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)); | |
2042 | current_sym_addr = 0; | |
2043 | ||
2044 | FORCE_TEXT; | |
2045 | if (DECL_NAME (parms)) | |
2046 | { | |
2047 | current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2048 | ||
2049 | fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP, | |
2050 | IDENTIFIER_POINTER (DECL_NAME (parms)), | |
2051 | DBX_MEMPARM_STABS_LETTER); | |
2052 | } | |
2053 | else | |
2054 | { | |
2055 | current_sym_nchars = 8; | |
2056 | fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP, | |
2057 | DBX_MEMPARM_STABS_LETTER); | |
2058 | } | |
2059 | ||
2060 | current_sym_value | |
2061 | = DEBUGGER_ARG_OFFSET (current_sym_value, | |
2062 | XEXP (DECL_RTL (parms), 0)); | |
2063 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
2064 | dbxout_finish_symbol (parms); | |
2065 | } | |
2066 | } | |
2067 | } | |
2068 | ||
2069 | /* Output definitions for the places where parms live during the function, | |
2070 | when different from where they were passed, when the parms were passed | |
2071 | in memory. | |
2072 | ||
2073 | It is not useful to do this for parms passed in registers | |
2074 | that live during the function in different registers, because it is | |
2075 | impossible to look in the passed register for the passed value, | |
2076 | so we use the within-the-function register to begin with. | |
2077 | ||
2078 | PARMS is a chain of PARM_DECL nodes. */ | |
2079 | ||
2080 | void | |
2081 | dbxout_reg_parms (parms) | |
2082 | tree parms; | |
2083 | { | |
2084 | for (; parms; parms = TREE_CHAIN (parms)) | |
2085 | if (DECL_NAME (parms)) | |
2086 | { | |
2087 | dbxout_prepare_symbol (parms); | |
2088 | ||
2089 | /* Report parms that live in registers during the function | |
2090 | but were passed in memory. */ | |
2091 | if (GET_CODE (DECL_RTL (parms)) == REG | |
2092 | && REGNO (DECL_RTL (parms)) >= 0 | |
2093 | && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER | |
2094 | && PARM_PASSED_IN_MEMORY (parms)) | |
2095 | { | |
2096 | current_sym_code = N_RSYM; | |
2097 | current_sym_value = DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))); | |
2098 | current_sym_addr = 0; | |
2099 | ||
2100 | FORCE_TEXT; | |
2101 | if (DECL_NAME (parms)) | |
2102 | { | |
2103 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms)); | |
2104 | fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP, | |
2105 | IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2106 | } | |
2107 | else | |
2108 | { | |
2109 | current_sym_nchars = 8; | |
2110 | fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP); | |
2111 | } | |
2112 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
2113 | dbxout_finish_symbol (parms); | |
2114 | } | |
2115 | /* Report parms that live in memory but not where they were passed. */ | |
2116 | else if (GET_CODE (DECL_RTL (parms)) == MEM | |
2117 | && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS | |
2118 | && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT | |
2119 | && PARM_PASSED_IN_MEMORY (parms) | |
2120 | && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms))) | |
2121 | { | |
2122 | #if 0 /* ??? It is not clear yet what should replace this. */ | |
2123 | int offset = DECL_OFFSET (parms) / BITS_PER_UNIT; | |
2124 | /* A parm declared char is really passed as an int, | |
2125 | so it occupies the least significant bytes. | |
2126 | On a big-endian machine those are not the low-numbered ones. */ | |
2127 | #if BYTES_BIG_ENDIAN | |
2128 | if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms)) | |
2129 | offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms))) | |
2130 | - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms)))); | |
2131 | #endif | |
2132 | if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...} | |
2133 | #endif | |
2134 | current_sym_code = N_LSYM; | |
2135 | current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (DECL_RTL (parms), 0)); | |
2136 | current_sym_addr = 0; | |
2137 | FORCE_TEXT; | |
2138 | if (DECL_NAME (parms)) | |
2139 | { | |
2140 | current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms)); | |
2141 | fprintf (asmfile, "%s \"%s:", ASM_STABS_OP, | |
2142 | IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2143 | } | |
2144 | else | |
2145 | { | |
2146 | current_sym_nchars = 8; | |
2147 | fprintf (asmfile, "%s \"(anon):", ASM_STABS_OP); | |
2148 | } | |
2149 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
2150 | dbxout_finish_symbol (parms); | |
2151 | } | |
2152 | #if 0 | |
2153 | else if (GET_CODE (DECL_RTL (parms)) == MEM | |
2154 | && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG) | |
2155 | { | |
2156 | /* Parm was passed via invisible reference. | |
2157 | That is, its address was passed in a register. | |
2158 | Output it as if it lived in that register. | |
2159 | The debugger will know from the type | |
2160 | that it was actually passed by invisible reference. */ | |
2161 | ||
2162 | current_sym_code = N_RSYM; | |
2163 | ||
2164 | /* DECL_RTL looks like (MEM (REG...). Get the register number. */ | |
2165 | current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0)); | |
2166 | current_sym_addr = 0; | |
2167 | ||
2168 | FORCE_TEXT; | |
2169 | if (DECL_NAME (parms)) | |
2170 | { | |
2171 | current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2172 | ||
2173 | fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP, | |
2174 | IDENTIFIER_POINTER (DECL_NAME (parms))); | |
2175 | } | |
2176 | else | |
2177 | { | |
2178 | current_sym_nchars = 8; | |
2179 | fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP); | |
2180 | } | |
2181 | ||
2182 | dbxout_type (TREE_TYPE (parms), 0, 0); | |
2183 | dbxout_finish_symbol (parms); | |
2184 | } | |
2185 | #endif | |
2186 | } | |
2187 | } | |
2188 | \f | |
2189 | /* Given a chain of ..._TYPE nodes (as come in a parameter list), | |
2190 | output definitions of those names, in raw form */ | |
2191 | ||
2192 | void | |
2193 | dbxout_args (args) | |
2194 | tree args; | |
2195 | { | |
2196 | while (args) | |
2197 | { | |
2198 | putc (',', asmfile); | |
2199 | dbxout_type (TREE_VALUE (args), 0, 0); | |
2200 | CHARS (1); | |
2201 | args = TREE_CHAIN (args); | |
2202 | } | |
2203 | } | |
2204 | \f | |
2205 | /* Given a chain of ..._TYPE nodes, | |
2206 | find those which have typedef names and output those names. | |
2207 | This is to ensure those types get output. */ | |
2208 | ||
2209 | void | |
2210 | dbxout_types (types) | |
2211 | register tree types; | |
2212 | { | |
2213 | while (types) | |
2214 | { | |
2215 | if (TYPE_NAME (types) | |
2216 | && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL | |
2217 | && ! TREE_ASM_WRITTEN (TYPE_NAME (types))) | |
2218 | dbxout_symbol (TYPE_NAME (types), 1); | |
2219 | types = TREE_CHAIN (types); | |
2220 | } | |
2221 | } | |
2222 | \f | |
2223 | /* Output everything about a symbol block (a BLOCK node | |
2224 | that represents a scope level), | |
2225 | including recursive output of contained blocks. | |
2226 | ||
2227 | BLOCK is the BLOCK node. | |
2228 | DEPTH is its depth within containing symbol blocks. | |
2229 | ARGS is usually zero; but for the outermost block of the | |
2230 | body of a function, it is a chain of PARM_DECLs for the function parameters. | |
2231 | We output definitions of all the register parms | |
2232 | as if they were local variables of that block. | |
2233 | ||
2234 | If -g1 was used, we count blocks just the same, but output nothing | |
2235 | except for the outermost block. | |
2236 | ||
2237 | Actually, BLOCK may be several blocks chained together. | |
2238 | We handle them all in sequence. */ | |
2239 | ||
2240 | static void | |
2241 | dbxout_block (block, depth, args) | |
2242 | register tree block; | |
2243 | int depth; | |
2244 | tree args; | |
2245 | { | |
2246 | int blocknum; | |
2247 | ||
2248 | while (block) | |
2249 | { | |
2250 | /* Ignore blocks never expanded or otherwise marked as real. */ | |
2251 | if (TREE_USED (block)) | |
2252 | { | |
2253 | #ifndef DBX_LBRAC_FIRST | |
2254 | /* In dbx format, the syms of a block come before the N_LBRAC. */ | |
2255 | if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0) | |
2256 | dbxout_syms (BLOCK_VARS (block)); | |
2257 | if (args) | |
2258 | dbxout_reg_parms (args); | |
2259 | #endif | |
2260 | ||
2261 | /* Now output an N_LBRAC symbol to represent the beginning of | |
2262 | the block. Use the block's tree-walk order to generate | |
2263 | the assembler symbols LBBn and LBEn | |
2264 | that final will define around the code in this block. */ | |
2265 | if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE) | |
2266 | { | |
2267 | char buf[20]; | |
2268 | blocknum = next_block_number++; | |
2269 | ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum); | |
2270 | ||
2271 | if (BLOCK_HANDLER_BLOCK (block)) | |
2272 | { | |
2273 | /* A catch block. Must precede N_LBRAC. */ | |
2274 | tree decl = BLOCK_VARS (block); | |
2275 | while (decl) | |
2276 | { | |
2277 | #ifdef DBX_OUTPUT_CATCH | |
2278 | DBX_OUTPUT_CATCH (asmfile, decl, buf); | |
2279 | #else | |
2280 | fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP, | |
2281 | IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH); | |
2282 | assemble_name (asmfile, buf); | |
2283 | fprintf (asmfile, "\n"); | |
2284 | #endif | |
2285 | decl = TREE_CHAIN (decl); | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | #ifdef DBX_OUTPUT_LBRAC | |
2290 | DBX_OUTPUT_LBRAC (asmfile, buf); | |
2291 | #else | |
2292 | fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); | |
2293 | assemble_name (asmfile, buf); | |
2294 | #if DBX_BLOCKS_FUNCTION_RELATIVE | |
2295 | fputc ('-', asmfile); | |
2296 | assemble_name (asmfile, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); | |
2297 | #endif | |
2298 | fprintf (asmfile, "\n"); | |
2299 | #endif | |
2300 | } | |
2301 | else if (depth > 0) | |
2302 | /* Count blocks the same way regardless of debug_info_level. */ | |
2303 | next_block_number++; | |
2304 | ||
2305 | #ifdef DBX_LBRAC_FIRST | |
2306 | /* On some weird machines, the syms of a block | |
2307 | come after the N_LBRAC. */ | |
2308 | if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0) | |
2309 | dbxout_syms (BLOCK_VARS (block)); | |
2310 | if (args) | |
2311 | dbxout_reg_parms (args); | |
2312 | #endif | |
2313 | ||
2314 | /* Output the subblocks. */ | |
2315 | dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE); | |
2316 | ||
2317 | /* Refer to the marker for the end of the block. */ | |
2318 | if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE) | |
2319 | { | |
2320 | char buf[20]; | |
2321 | ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum); | |
2322 | #ifdef DBX_OUTPUT_RBRAC | |
2323 | DBX_OUTPUT_RBRAC (asmfile, buf); | |
2324 | #else | |
2325 | fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); | |
2326 | assemble_name (asmfile, buf); | |
2327 | #if DBX_BLOCKS_FUNCTION_RELATIVE | |
2328 | fputc ('-', asmfile); | |
2329 | assemble_name (asmfile, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); | |
2330 | #endif | |
2331 | fprintf (asmfile, "\n"); | |
2332 | #endif | |
2333 | } | |
2334 | } | |
2335 | block = BLOCK_CHAIN (block); | |
2336 | } | |
2337 | } | |
2338 | ||
2339 | /* Output the information about a function and its arguments and result. | |
2340 | Usually this follows the function's code, | |
2341 | but on some systems, it comes before. */ | |
2342 | ||
2343 | static void | |
2344 | dbxout_really_begin_function (decl) | |
2345 | tree decl; | |
2346 | { | |
2347 | dbxout_symbol (decl, 0); | |
2348 | dbxout_parms (DECL_ARGUMENTS (decl)); | |
2349 | if (DECL_NAME (DECL_RESULT (decl)) != 0) | |
2350 | dbxout_symbol (DECL_RESULT (decl), 1); | |
2351 | } | |
2352 | ||
2353 | /* Called at beginning of output of function definition. */ | |
2354 | ||
2355 | void | |
2356 | dbxout_begin_function (decl) | |
2357 | tree decl; | |
2358 | { | |
2359 | #ifdef DBX_FUNCTION_FIRST | |
2360 | dbxout_really_begin_function (decl); | |
2361 | #endif | |
2362 | } | |
2363 | ||
2364 | /* Output dbx data for a function definition. | |
2365 | This includes a definition of the function name itself (a symbol), | |
2366 | definitions of the parameters (locating them in the parameter list) | |
2367 | and then output the block that makes up the function's body | |
2368 | (including all the auto variables of the function). */ | |
2369 | ||
2370 | void | |
2371 | dbxout_function (decl) | |
2372 | tree decl; | |
2373 | { | |
2374 | #ifndef DBX_FUNCTION_FIRST | |
2375 | dbxout_really_begin_function (decl); | |
2376 | #endif | |
2377 | dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl)); | |
2378 | #ifdef DBX_OUTPUT_FUNCTION_END | |
2379 | DBX_OUTPUT_FUNCTION_END (asmfile, decl); | |
2380 | #endif | |
2381 | } | |
2382 | #endif /* DBX_DEBUGGING_INFO */ |