1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 88, 92-97, 1998 Free Software Foundation, Inc.
4 This file is part of GNU CC.
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)
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.
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, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 /* Output dbx-format symbol table data.
23 This consists of many symbol table entries, each of them
24 a .stabs assembler pseudo-op with four operands:
25 a "name" which is really a description of one symbol and its type,
26 a "code", which is a symbol defined in stab.h whose name starts with N_,
27 an unused operand always 0,
28 and a "value" which is an address or an offset.
29 The name is enclosed in doublequote characters.
31 Each function, variable, typedef, and structure tag
32 has a symbol table entry to define it.
33 The beginning and end of each level of name scoping within
34 a function are also marked by special symbol table entries.
36 The "name" consists of the symbol name, a colon, a kind-of-symbol letter,
37 and a data type number. The data type number may be followed by
38 "=" and a type definition; normally this will happen the first time
39 the type number is mentioned. The type definition may refer to
40 other types by number, and those type numbers may be followed
41 by "=" and nested definitions.
43 This can make the "name" quite long.
44 When a name is more than 80 characters, we split the .stabs pseudo-op
45 into two .stabs pseudo-ops, both sharing the same "code" and "value".
46 The first one is marked as continued with a double-backslash at the
49 The kind-of-symbol letter distinguished function names from global
50 variables from file-scope variables from parameters from auto
51 variables in memory from typedef names from register variables.
54 The "code" is mostly redundant with the kind-of-symbol letter
55 that goes in the "name", but not entirely: for symbols located
56 in static storage, the "code" says which segment the address is in,
57 which controls how it is relocated.
59 The "value" for a symbol in static storage
60 is the core address of the symbol (actually, the assembler
61 label for the symbol). For a symbol located in a stack slot
62 it is the stack offset; for one in a register, the register number.
63 For a typedef symbol, it is zero.
65 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
66 output while in the text section.
68 For more on data type definitions, see `dbxout_type'. */
77 #include "insn-config.h"
80 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
84 #ifdef XCOFF_DEBUGGING_INFO
89 #define ASM_STABS_OP ".stabs"
93 #define ASM_STABN_OP ".stabn"
96 #ifndef DBX_TYPE_DECL_STABS_CODE
97 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
100 #ifndef DBX_STATIC_CONST_VAR_CODE
101 #define DBX_STATIC_CONST_VAR_CODE N_FUN
104 #ifndef DBX_REGPARM_STABS_CODE
105 #define DBX_REGPARM_STABS_CODE N_RSYM
108 #ifndef DBX_REGPARM_STABS_LETTER
109 #define DBX_REGPARM_STABS_LETTER 'P'
112 /* This is used for parameters passed by invisible reference in a register. */
113 #ifndef GDB_INV_REF_REGPARM_STABS_LETTER
114 #define GDB_INV_REF_REGPARM_STABS_LETTER 'a'
117 #ifndef DBX_MEMPARM_STABS_LETTER
118 #define DBX_MEMPARM_STABS_LETTER 'p'
121 #ifndef FILE_NAME_JOINER
122 #define FILE_NAME_JOINER "/"
125 /* Nonzero means if the type has methods, only output debugging
126 information if methods are actually written to the asm file. This
127 optimization only works if the debugger can detect the special C++
130 #define MINIMAL_DEBUG 1
132 #ifdef NO_DOLLAR_IN_LABEL
133 #ifdef NO_DOT_IN_LABEL
135 #define MINIMAL_DEBUG 0
141 /* Typical USG systems don't have stab.h, and they also have
142 no use for DBX-format debugging info. */
144 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
146 static int flag_minimal_debug = MINIMAL_DEBUG;
148 /* Nonzero if we have actually used any of the GDB extensions
149 to the debugging format. The idea is that we use them for the
150 first time only if there's a strong reason, but once we have done that,
151 we use them whenever convenient. */
153 static int have_used_extensions = 0;
155 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
156 for the N_SO filename stabs label. */
158 static int source_label_number = 1;
160 #ifdef DEBUG_SYMS_TEXT
161 #define FORCE_TEXT text_section ();
166 /* If there is a system stabs.h, use it. Otherwise, use our own. */
173 /* This is a GNU extension we need to reference in this file. */
180 #define STAB_CODE_TYPE enum __stab_debug_code
182 #define STAB_CODE_TYPE int
185 /* 1 if PARM is passed to this function in memory. */
187 #define PARM_PASSED_IN_MEMORY(PARM) \
188 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
190 /* A C expression for the integer offset value of an automatic variable
191 (N_LSYM) having address X (an RTX). */
192 #ifndef DEBUGGER_AUTO_OFFSET
193 #define DEBUGGER_AUTO_OFFSET(X) \
194 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
197 /* A C expression for the integer offset value of an argument (N_PSYM)
198 having address X (an RTX). The nominal offset is OFFSET. */
199 #ifndef DEBUGGER_ARG_OFFSET
200 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
203 /* Stream for writing to assembler file. */
205 static FILE *asmfile;
207 /* Last source file name mentioned in a NOTE insn. */
209 static char *lastfile;
211 /* Current working directory. */
215 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED};
217 /* Structure recording information about a C data type.
218 The status element says whether we have yet output
219 the definition of the type. TYPE_XREF says we have
220 output it as a cross-reference only.
221 The file_number and type_number elements are used if DBX_USE_BINCL
226 enum typestatus status;
233 /* Vector recording information about C data types.
234 When we first notice a data type (a tree node),
235 we assign it a number using next_type_number.
236 That is its index in this vector. */
238 struct typeinfo *typevec;
240 /* Number of elements of space allocated in `typevec'. */
242 static int typevec_len;
244 /* In dbx output, each type gets a unique number.
245 This is the number for the next type output.
246 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
248 static int next_type_number;
252 /* When using N_BINCL in dbx output, each type number is actually a
253 pair of the file number and the type number within the file.
254 This is a stack of input files. */
258 struct dbx_file *next;
260 int next_type_number;
263 /* This is the top of the stack. */
265 static struct dbx_file *current_file;
267 /* This is the next file number to use. */
269 static int next_file_number;
271 #endif /* DBX_USE_BINCL */
273 /* In dbx output, we must assign symbol-blocks id numbers
274 in the order in which their beginnings are encountered.
275 We output debugging info that refers to the beginning and
276 end of the ranges of code in each block
277 with assembler labels LBBn and LBEn, where n is the block number.
278 The labels are generated in final, which assigns numbers to the
279 blocks in the same way. */
281 static int next_block_number;
283 /* These variables are for dbxout_symbol to communicate to
284 dbxout_finish_symbol.
285 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
286 current_sym_value and current_sym_addr are two ways to address the
287 value to store in the symtab entry.
288 current_sym_addr if nonzero represents the value as an rtx.
289 If that is zero, current_sym_value is used. This is used
290 when the value is an offset (such as for auto variables,
291 register variables and parms). */
293 static STAB_CODE_TYPE current_sym_code;
294 static int current_sym_value;
295 static rtx current_sym_addr;
297 /* Number of chars of symbol-description generated so far for the
298 current symbol. Used by CHARS and CONTIN. */
300 static int current_sym_nchars;
302 /* Report having output N chars of the current symbol-description. */
304 #define CHARS(N) (current_sym_nchars += (N))
306 /* Break the current symbol-description, generating a continuation,
307 if it has become long. */
309 #ifndef DBX_CONTIN_LENGTH
310 #define DBX_CONTIN_LENGTH 80
313 #if DBX_CONTIN_LENGTH > 0
315 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
320 void dbxout_types ();
322 void dbxout_symbol ();
324 #if defined(ASM_OUTPUT_SECTION_NAME)
325 static void dbxout_function_end PROTO((void));
327 static void dbxout_typedefs PROTO((tree));
328 static void dbxout_type_index PROTO((tree));
329 #if DBX_CONTIN_LENGTH > 0
330 static void dbxout_continue PROTO((void));
332 static void dbxout_type_fields PROTO((tree));
333 static void dbxout_type_method_1 PROTO((tree, char *));
334 static void dbxout_type_methods PROTO((tree));
335 static void dbxout_range_type PROTO((tree));
336 static void dbxout_type PROTO((tree, int, int));
337 static void print_int_cst_octal PROTO((tree));
338 static void print_octal PROTO((unsigned HOST_WIDE_INT, int));
339 static void dbxout_type_name PROTO((tree));
340 static void dbxout_symbol_location PROTO((tree, tree, char *, rtx));
341 static void dbxout_symbol_name PROTO((tree, char *, int));
342 static void dbxout_prepare_symbol PROTO((tree));
343 static void dbxout_finish_symbol PROTO((tree));
344 static void dbxout_block PROTO((tree, int, tree));
345 static void dbxout_really_begin_function PROTO((tree));
347 #if defined(ASM_OUTPUT_SECTION_NAME)
349 dbxout_function_end ()
351 static int scope_labelno = 0;
352 char lscope_label_name[100];
353 /* Convert Ltext into the appropriate format for local labels in case
354 the system doesn't insert underscores in front of user generated
356 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name, "Lscope", scope_labelno);
357 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Lscope", scope_labelno);
360 /* By convention, GCC will mark the end of a function with an N_FUN
361 symbol and an empty string. */
362 fprintf (asmfile, "%s \"\",%d,0,0,", ASM_STABS_OP, N_FUN);
363 assemble_name (asmfile, lscope_label_name);
364 fputc ('-', asmfile);
365 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
366 fprintf (asmfile, "\n");
368 #endif /* ! NO_DBX_FUNCTION_END */
370 /* At the beginning of compilation, start writing the symbol table.
371 Initialize `typevec' and output the standard data types of C. */
374 dbxout_init (asm_file, input_file_name, syms)
376 char *input_file_name;
379 char ltext_label_name[100];
384 typevec = (struct typeinfo *) xmalloc (typevec_len * sizeof typevec[0]);
385 bzero ((char *) typevec, typevec_len * sizeof typevec[0]);
387 /* Convert Ltext into the appropriate format for local labels in case
388 the system doesn't insert underscores in front of user generated
390 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
392 /* Put the current working directory in an N_SO symbol. */
393 #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this,
394 but GDB always does. */
395 if (use_gnu_debug_info_extensions)
398 if (!cwd && (cwd = getpwd ()) && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
400 char *wdslash = xmalloc (strlen (cwd) + sizeof (FILE_NAME_JOINER));
401 sprintf (wdslash, "%s%s", cwd, FILE_NAME_JOINER);
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 ", ASM_STABS_OP);
410 output_quoted_string (asmfile, cwd);
411 fprintf (asmfile, ",%d,0,0,%s\n", N_SO, <ext_label_name[1]);
412 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
416 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
417 /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That
418 would give us an N_SOL, and we want an N_SO. */
419 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
420 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
421 /* We include outputting `Ltext:' here,
422 because that gives you a way to override it. */
423 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
424 fprintf (asmfile, "%s ", ASM_STABS_OP);
425 output_quoted_string (asmfile, input_file_name);
426 fprintf (asmfile, ",%d,0,0,%s\n",
427 N_SO, <ext_label_name[1]);
429 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", 0);
430 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
432 /* Possibly output something to inform GDB that this compilation was by
433 GCC. It's easier for GDB to parse it when after the N_SO's. This
434 is used in Solaris 2. */
435 #ifdef ASM_IDENTIFY_GCC_AFTER_SOURCE
436 ASM_IDENTIFY_GCC_AFTER_SOURCE (asmfile);
439 lastfile = input_file_name;
441 next_type_number = 1;
442 next_block_number = 2;
445 current_file = (struct dbx_file *) xmalloc (sizeof *current_file);
446 current_file->next = NULL;
447 current_file->file_number = 0;
448 current_file->next_type_number = 1;
449 next_file_number = 1;
452 /* Make sure that types `int' and `char' have numbers 1 and 2.
453 Definitions of other integer types will refer to those numbers.
454 (Actually it should no longer matter what their numbers are.
455 Also, if any types with tags have been defined, dbxout_symbol
456 will output them first, so the numbers won't be 1 and 2. That
457 happens in C++. So it's a good thing it should no longer matter). */
459 #ifdef DBX_OUTPUT_STANDARD_TYPES
460 DBX_OUTPUT_STANDARD_TYPES (syms);
462 dbxout_symbol (TYPE_NAME (integer_type_node), 0);
463 dbxout_symbol (TYPE_NAME (char_type_node), 0);
466 /* Get all permanent types that have typedef names,
467 and output them all, except for those already output. */
469 dbxout_typedefs (syms);
472 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
473 in the reverse order from that which is found in SYMS. */
476 dbxout_typedefs (syms)
481 dbxout_typedefs (TREE_CHAIN (syms));
482 if (TREE_CODE (syms) == TYPE_DECL)
484 tree type = TREE_TYPE (syms);
486 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
487 && TYPE_SIZE (type) != NULL_TREE
488 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
489 dbxout_symbol (TYPE_NAME (type), 0);
494 /* Change to reading from a new source file. Generate a N_BINCL stab. */
497 dbxout_start_new_source_file (filename)
501 struct dbx_file *n = (struct dbx_file *) xmalloc (sizeof *n);
503 n->next = current_file;
504 n->file_number = next_file_number++;
505 n->next_type_number = 1;
507 fprintf (asmfile, "%s ", ASM_STABS_OP);
508 output_quoted_string (asmfile, filename);
509 fprintf (asmfile, ",%d,0,0,0\n", N_BINCL);
513 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
516 dbxout_resume_previous_source_file ()
519 struct dbx_file *next;
521 fprintf (asmfile, "%s %d,0,0,0\n", ASM_STABN_OP, N_EINCL);
522 next = current_file->next;
528 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
531 dbxout_source_file (file, filename)
535 char ltext_label_name[100];
537 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
539 #ifdef DBX_OUTPUT_SOURCE_FILENAME
540 DBX_OUTPUT_SOURCE_FILENAME (file, filename);
542 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext",
543 source_label_number);
544 fprintf (file, "%s ", ASM_STABS_OP);
545 output_quoted_string (file, filename);
546 fprintf (file, ",%d,0,0,%s\n", N_SOL, <ext_label_name[1]);
547 if (current_function_decl != NULL_TREE
548 && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
549 ; /* Don't change section amid function. */
552 ASM_OUTPUT_INTERNAL_LABEL (file, "Ltext", source_label_number);
553 source_label_number++;
559 /* Output a line number symbol entry into output stream FILE,
560 for source file FILENAME and line number LINENO. */
563 dbxout_source_line (file, filename, lineno)
568 dbxout_source_file (file, filename);
570 #ifdef ASM_OUTPUT_SOURCE_LINE
571 ASM_OUTPUT_SOURCE_LINE (file, lineno);
573 fprintf (file, "\t%s %d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
577 /* At the end of compilation, finish writing the symbol table.
578 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
582 dbxout_finish (file, filename)
586 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
587 DBX_OUTPUT_MAIN_SOURCE_FILE_END (file, filename);
588 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
591 /* Output the index of a type. */
594 dbxout_type_index (type)
597 #ifndef DBX_USE_BINCL
598 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
601 struct typeinfo *t = &typevec[TYPE_SYMTAB_ADDRESS (type)];
602 fprintf (asmfile, "(%d,%d)", t->file_number, t->type_number);
607 #if DBX_CONTIN_LENGTH > 0
608 /* Continue a symbol-description that gets too big.
609 End one symbol table entry with a double-backslash
610 and start a new one, eventually producing something like
611 .stabs "start......\\",code,0,value
612 .stabs "...rest",code,0,value */
617 #ifdef DBX_CONTIN_CHAR
618 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
620 fprintf (asmfile, "\\\\");
622 dbxout_finish_symbol (NULL_TREE);
623 fprintf (asmfile, "%s \"", ASM_STABS_OP);
624 current_sym_nchars = 0;
626 #endif /* DBX_CONTIN_LENGTH > 0 */
628 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
629 This must be a separate function because anonymous unions require
633 dbxout_type_fields (type)
637 /* Output the name, type, position (in bits), size (in bits) of each
639 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
641 /* Omit here local type decls until we know how to support them. */
642 if (TREE_CODE (tem) == TYPE_DECL)
644 /* Omit fields whose position or size are variable. */
645 else if (TREE_CODE (tem) == FIELD_DECL
646 && (TREE_CODE (DECL_FIELD_BITPOS (tem)) != INTEGER_CST
647 || TREE_CODE (DECL_SIZE (tem)) != INTEGER_CST))
649 /* Omit here the nameless fields that are used to skip bits. */
650 else if (DECL_IGNORED_P (tem))
652 else if (TREE_CODE (tem) != CONST_DECL)
654 /* Continue the line if necessary,
655 but not before the first field. */
656 if (tem != TYPE_FIELDS (type))
661 if (use_gnu_debug_info_extensions
662 && flag_minimal_debug
663 && TREE_CODE (tem) == FIELD_DECL
664 && DECL_VIRTUAL_P (tem)
665 && DECL_ASSEMBLER_NAME (tem))
667 have_used_extensions = 1;
668 CHARS (3 + IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (tem)));
669 fputs (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)), asmfile);
670 dbxout_type (DECL_FCONTEXT (tem), 0, 0);
671 fprintf (asmfile, ":");
672 dbxout_type (TREE_TYPE (tem), 0, 0);
673 fputc (',', asmfile);
674 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
675 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
676 fputc (';', asmfile);
682 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
683 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
687 fprintf (asmfile, ":");
691 if (use_gnu_debug_info_extensions
692 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
693 || TREE_CODE (tem) != FIELD_DECL))
695 have_used_extensions = 1;
697 putc ((TREE_PRIVATE (tem) ? '0'
698 : TREE_PROTECTED (tem) ? '1' : '2'),
703 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
704 && DECL_BIT_FIELD_TYPE (tem))
705 ? DECL_BIT_FIELD_TYPE (tem)
706 : TREE_TYPE (tem), 0, 0);
708 if (TREE_CODE (tem) == VAR_DECL)
710 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
712 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
713 have_used_extensions = 1;
714 fprintf (asmfile, ":%s;", name);
715 CHARS (strlen (name));
719 /* If TEM is non-static, GDB won't understand it. */
720 fprintf (asmfile, ",0,0;");
723 else if (TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
725 fputc (',', asmfile);
726 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
727 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
728 fputc (',', asmfile);
729 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
730 TREE_INT_CST_LOW (DECL_SIZE (tem)));
731 fputc (';', asmfile);
738 /* Subroutine of `dbxout_type_methods'. Output debug info about the
739 method described DECL. DEBUG_NAME is an encoding of the method's
740 type signature. ??? We may be able to do without DEBUG_NAME altogether
744 dbxout_type_method_1 (decl, debug_name)
750 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
752 else /* it's a METHOD_TYPE. */
754 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
755 /* A for normal functions.
756 B for `const' member functions.
757 C for `volatile' member functions.
758 D for `const volatile' member functions. */
759 if (TYPE_READONLY (TREE_TYPE (firstarg)))
761 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
764 if (DECL_VINDEX (decl))
770 fprintf (asmfile, ":%s;%c%c%c", debug_name,
771 TREE_PRIVATE (decl) ? '0' : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
772 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
773 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
774 if (DECL_VINDEX (decl))
776 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
777 TREE_INT_CST_LOW (DECL_VINDEX (decl)));
778 fputc (';', asmfile);
779 dbxout_type (DECL_CONTEXT (decl), 0, 0);
780 fprintf (asmfile, ";");
785 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
789 dbxout_type_methods (type)
792 /* C++: put out the method names and their parameter lists */
793 tree methods = TYPE_METHODS (type);
795 register tree fndecl;
797 char formatted_type_identifier_length[16];
798 register int type_identifier_length;
800 if (methods == NULL_TREE)
803 type_encoding = DECL_NAME (TYPE_NAME (type));
806 /* C++: Template classes break some assumptions made by this code about
807 the class names, constructor names, and encodings for assembler
808 label names. For now, disable output of dbx info for them. */
810 char *ptr = IDENTIFIER_POINTER (type_encoding);
811 /* This should use index. (mrs) */
812 while (*ptr && *ptr != '<') ptr++;
819 #ifdef HAVE_TEMPLATES
820 if (warn_template_debugging)
821 warning ("dbx info for template class methods not yet supported");
829 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
831 sprintf(formatted_type_identifier_length, "%d", type_identifier_length);
833 if (TREE_CODE (methods) != TREE_VEC)
835 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
836 fndecl = TREE_VEC_ELT (methods, 0);
838 fndecl = TREE_VEC_ELT (methods, 1);
842 tree name = DECL_NAME (fndecl);
845 /* Group together all the methods for the same operation.
846 These differ in the types of the arguments. */
847 for (last = NULL_TREE;
848 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
849 fndecl = TREE_CHAIN (fndecl))
850 /* Output the name of the field (after overloading), as
851 well as the name of the field before overloading, along
852 with its parameter list */
854 /* This is the "mangled" name of the method.
855 It encodes the argument types. */
856 char *debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
857 int show_arg_types = 0;
863 if (DECL_IGNORED_P (fndecl))
866 if (flag_minimal_debug)
870 /* We can't optimize a method which uses an anonymous
871 class, because the debugger will not be able to
872 associate the arbitrary class name with the actual
874 #ifndef NO_DOLLAR_IN_LABEL
879 if (strchr (debug_name, marker))
881 /* Detect ordinary methods because their mangled names
882 start with the operation name. */
883 else if (!strncmp (IDENTIFIER_POINTER (name), debug_name,
884 IDENTIFIER_LENGTH (name)))
886 debug_name += IDENTIFIER_LENGTH (name);
887 if (debug_name[0] == '_' && debug_name[1] == '_')
889 char *method_name = debug_name + 2;
890 char *length_ptr = formatted_type_identifier_length;
891 /* Get past const and volatile qualifiers. */
892 while (*method_name == 'C' || *method_name == 'V')
894 /* Skip digits for length of type_encoding. */
895 while (*method_name == *length_ptr && *length_ptr)
896 length_ptr++, method_name++;
897 if (! strncmp (method_name,
898 IDENTIFIER_POINTER (type_encoding),
899 type_identifier_length))
900 method_name += type_identifier_length;
901 debug_name = method_name;
904 /* Detect constructors by their style of name mangling. */
905 else if (debug_name[0] == '_' && debug_name[1] == '_')
907 char *ctor_name = debug_name + 2;
908 char *length_ptr = formatted_type_identifier_length;
909 while (*ctor_name == 'C' || *ctor_name == 'V')
911 /* Skip digits for length of type_encoding. */
912 while (*ctor_name == *length_ptr && *length_ptr)
913 length_ptr++, ctor_name++;
914 if (!strncmp (IDENTIFIER_POINTER (type_encoding), ctor_name,
915 type_identifier_length))
916 debug_name = ctor_name + type_identifier_length;
918 /* The other alternative is a destructor. */
922 /* Output the operation name just once, for the first method
926 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
927 CHARS (IDENTIFIER_LENGTH (name) + 2);
932 dbxout_type (TREE_TYPE (fndecl), 0, show_arg_types);
934 dbxout_type_method_1 (fndecl, debug_name);
944 /* Emit a "range" type specification, which has the form:
945 "r<index type>;<lower bound>;<upper bound>;".
946 TYPE is an INTEGER_TYPE. */
949 dbxout_range_type (type)
952 fprintf (asmfile, "r");
953 if (TREE_TYPE (type))
954 dbxout_type (TREE_TYPE (type), 0, 0);
955 else if (TREE_CODE (type) != INTEGER_TYPE)
956 dbxout_type (type, 0, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
959 /* Traditionally, we made sure 'int' was type 1, and builtin types
960 were defined to be sub-ranges of int. Unfortunately, this
961 does not allow us to distinguish true sub-ranges from integer
962 types. So, instead we define integer (non-sub-range) types as
963 sub-ranges of themselves. */
964 dbxout_type_index (type);
966 if (TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
968 fputc (';', asmfile);
969 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
970 TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)));
973 fprintf (asmfile, ";0");
974 if (TYPE_MAX_VALUE (type)
975 && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST)
977 fputc (';', asmfile);
978 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
979 TREE_INT_CST_LOW (TYPE_MAX_VALUE (type)));
980 fputc (';', asmfile);
983 fprintf (asmfile, ";-1;");
986 /* Output a reference to a type. If the type has not yet been
987 described in the dbx output, output its definition now.
988 For a type already defined, just refer to its definition
989 using the type number.
991 If FULL is nonzero, and the type has been described only with
992 a forward-reference, output the definition now.
993 If FULL is zero in this case, just refer to the forward-reference
994 using the number previously allocated.
996 If SHOW_ARG_TYPES is nonzero, we output a description of the argument
997 types for a METHOD_TYPE. */
1000 dbxout_type (type, full, show_arg_types)
1006 static int anonymous_type_number = 0;
1008 /* If there was an input error and we don't really have a type,
1009 avoid crashing and write something that is at least valid
1010 by assuming `int'. */
1011 if (type == error_mark_node)
1012 type = integer_type_node;
1015 /* Try to find the "main variant" with the same name but not const
1016 or volatile. (Since stabs does not distinguish const and volatile,
1017 there is no need to make them separate types. But types with
1018 different names are usefully distinguished.) */
1020 for (tem = TYPE_MAIN_VARIANT (type); tem; tem = TYPE_NEXT_VARIANT (tem))
1021 if (!TYPE_READONLY (tem) && !TYPE_VOLATILE (tem)
1022 && TYPE_NAME (tem) == TYPE_NAME (type))
1027 if (TYPE_NAME (type)
1028 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1029 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type)))
1033 if (TYPE_SYMTAB_ADDRESS (type) == 0)
1035 /* Type has no dbx number assigned. Assign next available number. */
1036 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
1038 /* Make sure type vector is long enough to record about this type. */
1040 if (next_type_number == typevec_len)
1043 = (struct typeinfo *) xrealloc (typevec,
1044 typevec_len * 2 * sizeof typevec[0]);
1045 bzero ((char *) (typevec + typevec_len),
1046 typevec_len * sizeof typevec[0]);
1050 #ifdef DBX_USE_BINCL
1051 typevec[TYPE_SYMTAB_ADDRESS (type)].file_number
1052 = current_file->file_number;
1053 typevec[TYPE_SYMTAB_ADDRESS (type)].type_number
1054 = current_file->next_type_number++;
1058 /* Output the number of this type, to refer to it. */
1059 dbxout_type_index (type);
1061 #ifdef DBX_TYPE_DEFINED
1062 if (DBX_TYPE_DEFINED (type))
1066 /* If this type's definition has been output or is now being output,
1069 switch (typevec[TYPE_SYMTAB_ADDRESS (type)].status)
1074 /* If we have already had a cross reference,
1075 and either that's all we want or that's the best we could do,
1076 don't repeat the cross reference.
1077 Sun dbx crashes if we do. */
1078 if (! full || TYPE_SIZE (type) == 0
1079 /* No way in DBX fmt to describe a variable size. */
1080 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1088 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1089 leave the type-number completely undefined rather than output
1090 a cross-reference. If we have already used GNU debug info extensions,
1091 then it is OK to output a cross reference. This is necessary to get
1092 proper C++ debug output. */
1093 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
1094 || TREE_CODE (type) == QUAL_UNION_TYPE
1095 || TREE_CODE (type) == ENUMERAL_TYPE)
1096 && ! use_gnu_debug_info_extensions)
1097 /* We must use the same test here as we use twice below when deciding
1098 whether to emit a cross-reference. */
1099 if ((TYPE_NAME (type) != 0
1100 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1101 && DECL_IGNORED_P (TYPE_NAME (type)))
1103 || TYPE_SIZE (type) == 0
1104 /* No way in DBX fmt to describe a variable size. */
1105 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1107 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1112 /* Output a definition now. */
1114 fprintf (asmfile, "=");
1117 /* Mark it as defined, so that if it is self-referent
1118 we will not get into an infinite recursion of definitions. */
1120 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_DEFINED;
1122 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1123 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
1125 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type)), 0, 0);
1129 switch (TREE_CODE (type))
1133 /* For a void type, just define it as itself; ie, "5=5".
1134 This makes us consider it defined
1135 without saying what it is. The debugger will make it
1136 a void type when the reference is seen, and nothing will
1137 ever override that default. */
1138 dbxout_type_index (type);
1142 if (type == char_type_node && ! TREE_UNSIGNED (type))
1144 /* Output the type `char' as a subrange of itself!
1145 I don't understand this definition, just copied it
1146 from the output of pcc.
1147 This used to use `r2' explicitly and we used to
1148 take care to make sure that `char' was type number 2. */
1149 fprintf (asmfile, "r");
1150 dbxout_type_index (type);
1151 fprintf (asmfile, ";0;127;");
1153 /* This used to check if the type's precision was more than
1154 HOST_BITS_PER_WIDE_INT. That is wrong since gdb uses a
1155 long (it has no concept of HOST_BITS_PER_WIDE_INT). */
1156 else if (use_gnu_debug_info_extensions
1157 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1158 || TYPE_PRECISION (type) >= HOST_BITS_PER_LONG))
1160 /* This used to say `r1' and we used to take care
1161 to make sure that `int' was type number 1. */
1162 fprintf (asmfile, "r");
1163 dbxout_type_index (integer_type_node);
1164 fprintf (asmfile, ";");
1165 print_int_cst_octal (TYPE_MIN_VALUE (type));
1166 fprintf (asmfile, ";");
1167 print_int_cst_octal (TYPE_MAX_VALUE (type));
1168 fprintf (asmfile, ";");
1170 else /* Output other integer types as subranges of `int'. */
1171 dbxout_range_type (type);
1176 /* This used to say `r1' and we used to take care
1177 to make sure that `int' was type number 1. */
1178 fprintf (asmfile, "r");
1179 dbxout_type_index (integer_type_node);
1180 fputc (';', asmfile);
1181 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC, int_size_in_bytes (type));
1182 fputs (";0;", asmfile);
1187 if (use_gnu_debug_info_extensions)
1189 fputs ("@s", asmfile);
1190 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1191 BITS_PER_UNIT * int_size_in_bytes (type));
1192 fputs (";-20;", asmfile);
1196 /* Output the type `char' as a subrange of itself.
1197 That is what pcc seems to do. */
1198 fprintf (asmfile, "r");
1199 dbxout_type_index (char_type_node);
1200 fprintf (asmfile, ";0;%d;", TREE_UNSIGNED (type) ? 255 : 127);
1206 if (use_gnu_debug_info_extensions)
1208 fputs ("@s", asmfile);
1209 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1210 BITS_PER_UNIT * int_size_in_bytes (type));
1211 fputs (";-16;", asmfile);
1213 else /* Define as enumeral type (False, True) */
1214 fprintf (asmfile, "eFalse:0,True:1,;");
1219 putc ('d', asmfile);
1221 dbxout_type (TREE_TYPE (type), 0, 0);
1225 /* Differs from the REAL_TYPE by its new data type number */
1227 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1229 fprintf (asmfile, "r");
1230 dbxout_type_index (type);
1231 fputc (';', asmfile);
1232 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1233 int_size_in_bytes (TREE_TYPE (type)));
1234 fputs (";0;", asmfile);
1235 CHARS (12); /* The number is probably incorrect here. */
1239 /* Output a complex integer type as a structure,
1240 pending some other way to do it. */
1241 fputc ('s', asmfile);
1242 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC, int_size_in_bytes (type));
1244 fprintf (asmfile, "real:");
1246 dbxout_type (TREE_TYPE (type), 0, 0);
1247 fprintf (asmfile, ",%d,%d;",
1248 0, TYPE_PRECISION (TREE_TYPE (type)));
1250 fprintf (asmfile, "imag:");
1252 dbxout_type (TREE_TYPE (type), 0, 0);
1253 fprintf (asmfile, ",%d,%d;;",
1254 TYPE_PRECISION (TREE_TYPE (type)),
1255 TYPE_PRECISION (TREE_TYPE (type)));
1261 if (use_gnu_debug_info_extensions)
1263 have_used_extensions = 1;
1264 fputs ("@s", asmfile);
1265 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1266 BITS_PER_UNIT * int_size_in_bytes (type));
1267 fputc (';', asmfile);
1268 /* Check if a bitstring type, which in Chill is
1269 different from a [power]set. */
1270 if (TYPE_STRING_FLAG (type))
1271 fprintf (asmfile, "@S;");
1273 putc ('S', asmfile);
1275 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1279 /* Output "a" followed by a range type definition
1280 for the index type of the array
1281 followed by a reference to the target-type.
1282 ar1;0;N;M for a C array of type M and size N+1. */
1283 /* Check if a character string type, which in Chill is
1284 different from an array of characters. */
1285 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1287 have_used_extensions = 1;
1288 fprintf (asmfile, "@S;");
1290 tem = TYPE_DOMAIN (type);
1293 fprintf (asmfile, "ar");
1294 dbxout_type_index (integer_type_node);
1295 fprintf (asmfile, ";0;-1;");
1299 fprintf (asmfile, "a");
1300 dbxout_range_type (tem);
1303 dbxout_type (TREE_TYPE (type), 0, 0);
1308 case QUAL_UNION_TYPE:
1310 int i, n_baseclasses = 0;
1312 if (TYPE_BINFO (type) != 0
1313 && TREE_CODE (TYPE_BINFO (type)) == TREE_VEC
1314 && TYPE_BINFO_BASETYPES (type) != 0)
1315 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1317 /* Output a structure type. We must use the same test here as we
1318 use in the DBX_NO_XREFS case above. */
1319 if ((TYPE_NAME (type) != 0
1320 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1321 && DECL_IGNORED_P (TYPE_NAME (type)))
1323 || TYPE_SIZE (type) == 0
1324 /* No way in DBX fmt to describe a variable size. */
1325 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1327 /* If the type is just a cross reference, output one
1328 and mark the type as partially described.
1329 If it later becomes defined, we will output
1330 its real definition.
1331 If the type has a name, don't nest its definition within
1332 another type's definition; instead, output an xref
1333 and let the definition come when the name is defined. */
1334 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1336 #if 0 /* This assertion is legitimately false in C++. */
1337 /* We shouldn't be outputting a reference to a type before its
1338 definition unless the type has a tag name.
1339 A typedef name without a tag name should be impossible. */
1340 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1343 if (TYPE_NAME (type) != 0)
1344 dbxout_type_name (type);
1346 fprintf (asmfile, "$$%d", anonymous_type_number++);
1347 fprintf (asmfile, ":");
1348 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1352 /* Identify record or union, and print its size. */
1353 fputc (((TREE_CODE (type) == RECORD_TYPE) ? 's' : 'u'), asmfile);
1354 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1355 int_size_in_bytes (type));
1357 if (use_gnu_debug_info_extensions)
1361 have_used_extensions = 1;
1362 fprintf (asmfile, "!%d,", n_baseclasses);
1366 for (i = 0; i < n_baseclasses; i++)
1368 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1369 if (use_gnu_debug_info_extensions)
1371 have_used_extensions = 1;
1372 putc (TREE_VIA_VIRTUAL (child) ? '1'
1375 putc (TREE_VIA_PUBLIC (child) ? '2'
1378 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1379 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1380 fputc (',', asmfile);
1382 dbxout_type (BINFO_TYPE (child), 0, 0);
1383 putc (';', asmfile);
1387 /* Print out the base class information with fields
1388 which have the same names at the types they hold. */
1389 dbxout_type_name (BINFO_TYPE (child));
1390 putc (':', asmfile);
1391 dbxout_type (BINFO_TYPE (child), full, 0);
1392 fputc (',', asmfile);
1393 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1394 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1395 fputc (',', asmfile);
1396 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1397 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1398 fputc (';', asmfile);
1406 /* Write out the field declarations. */
1407 dbxout_type_fields (type);
1408 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1410 have_used_extensions = 1;
1411 dbxout_type_methods (type);
1413 putc (';', asmfile);
1415 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1416 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1417 && TYPE_VFIELD (type))
1419 have_used_extensions = 1;
1421 /* Tell GDB+ that it may keep reading. */
1422 putc ('~', asmfile);
1424 /* We need to write out info about what field this class
1425 uses as its "main" vtable pointer field, because if this
1426 field is inherited from a base class, GDB cannot necessarily
1427 figure out which field it's using in time. */
1428 if (TYPE_VFIELD (type))
1430 putc ('%', asmfile);
1431 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1433 putc (';', asmfile);
1439 /* We must use the same test here as we use in the DBX_NO_XREFS case
1440 above. We simplify it a bit since an enum will never have a variable
1442 if ((TYPE_NAME (type) != 0
1443 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1444 && DECL_IGNORED_P (TYPE_NAME (type)))
1446 || TYPE_SIZE (type) == 0)
1448 fprintf (asmfile, "xe");
1450 dbxout_type_name (type);
1451 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1452 fprintf (asmfile, ":");
1455 #ifdef DBX_OUTPUT_ENUM
1456 DBX_OUTPUT_ENUM (asmfile, type);
1458 if (use_gnu_debug_info_extensions
1459 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1460 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1461 putc ('e', asmfile);
1463 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1465 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1466 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1467 fprintf (asmfile, HOST_WIDE_INT_PRINT_UNSIGNED,
1468 TREE_INT_CST_LOW (TREE_VALUE (tem)));
1469 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1470 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1471 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC,
1472 TREE_INT_CST_LOW (TREE_VALUE (tem)));
1474 print_int_cst_octal (TREE_VALUE (tem));
1475 fprintf (asmfile, ",");
1476 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1477 if (TREE_CHAIN (tem) != 0)
1482 putc (';', asmfile);
1488 putc ('*', asmfile);
1490 dbxout_type (TREE_TYPE (type), 0, 0);
1494 if (use_gnu_debug_info_extensions)
1496 have_used_extensions = 1;
1497 putc ('#', asmfile);
1499 if (flag_minimal_debug && !show_arg_types)
1501 /* Normally, just output the return type.
1502 The argument types are encoded in the method name. */
1503 putc ('#', asmfile);
1505 dbxout_type (TREE_TYPE (type), 0, 0);
1506 putc (';', asmfile);
1511 /* When outputting destructors, we need to write
1512 the argument types out longhand. */
1513 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1514 putc (',', asmfile);
1516 dbxout_type (TREE_TYPE (type), 0, 0);
1517 dbxout_args (TYPE_ARG_TYPES (type));
1518 putc (';', asmfile);
1524 /* Treat it as a function type. */
1525 dbxout_type (TREE_TYPE (type), 0, 0);
1530 if (use_gnu_debug_info_extensions)
1532 have_used_extensions = 1;
1533 putc ('@', asmfile);
1535 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1536 putc (',', asmfile);
1538 dbxout_type (TREE_TYPE (type), 0, 0);
1542 /* Should print as an int, because it is really
1544 dbxout_type (integer_type_node, 0, 0);
1548 case REFERENCE_TYPE:
1549 if (use_gnu_debug_info_extensions)
1550 have_used_extensions = 1;
1551 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1553 dbxout_type (TREE_TYPE (type), 0, 0);
1557 putc ('f', asmfile);
1559 dbxout_type (TREE_TYPE (type), 0, 0);
1567 /* Print the value of integer constant C, in octal,
1568 handling double precision. */
1571 print_int_cst_octal (c)
1574 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1575 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1576 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1577 int width = TYPE_PRECISION (TREE_TYPE (c));
1579 /* GDB wants constants with no extra leading "1" bits, so
1580 we need to remove any sign-extension that might be
1582 if (width == HOST_BITS_PER_WIDE_INT * 2)
1584 else if (width > HOST_BITS_PER_WIDE_INT)
1585 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1586 else if (width == HOST_BITS_PER_WIDE_INT)
1589 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1591 fprintf (asmfile, "0");
1595 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1596 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1600 unsigned HOST_WIDE_INT beg = high >> excess;
1601 unsigned HOST_WIDE_INT middle
1602 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1603 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1604 unsigned HOST_WIDE_INT end
1605 = low & (((unsigned HOST_WIDE_INT) 1
1606 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1609 fprintf (asmfile, "%o%01o", (int)beg, (int)middle);
1610 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1615 print_octal (value, digits)
1616 unsigned HOST_WIDE_INT value;
1621 for (i = digits - 1; i >= 0; i--)
1622 fprintf (asmfile, "%01o", (int)((value >> (3 * i)) & 7));
1625 /* Output the name of type TYPE, with no punctuation.
1626 Such names can be set up either by typedef declarations
1627 or by struct, enum and union tags. */
1630 dbxout_type_name (type)
1634 if (TYPE_NAME (type) == 0)
1636 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1638 t = TYPE_NAME (type);
1640 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1642 t = DECL_NAME (TYPE_NAME (type));
1647 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1648 CHARS (IDENTIFIER_LENGTH (t));
1651 /* Output a .stabs for the symbol defined by DECL,
1652 which must be a ..._DECL node in the normal namespace.
1653 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1654 LOCAL is nonzero if the scope is less than the entire file. */
1657 dbxout_symbol (decl, local)
1661 tree type = TREE_TYPE (decl);
1662 tree context = NULL_TREE;
1664 /* Cast avoids warning in old compilers. */
1665 current_sym_code = (STAB_CODE_TYPE) 0;
1666 current_sym_value = 0;
1667 current_sym_addr = 0;
1669 /* Ignore nameless syms, but don't ignore type tags. */
1671 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1672 || DECL_IGNORED_P (decl))
1675 dbxout_prepare_symbol (decl);
1677 /* The output will always start with the symbol name,
1678 so always count that in the length-output-so-far. */
1680 if (DECL_NAME (decl) != 0)
1681 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1683 switch (TREE_CODE (decl))
1686 /* Enum values are defined by defining the enum type. */
1690 if (DECL_RTL (decl) == 0)
1692 if (DECL_EXTERNAL (decl))
1694 /* Don't mention a nested function under its parent. */
1695 context = decl_function_context (decl);
1696 if (context == current_function_decl)
1698 if (GET_CODE (DECL_RTL (decl)) != MEM
1699 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1703 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1704 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1705 TREE_PUBLIC (decl) ? 'F' : 'f');
1707 current_sym_code = N_FUN;
1708 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1710 if (TREE_TYPE (type))
1711 dbxout_type (TREE_TYPE (type), 0, 0);
1713 dbxout_type (void_type_node, 0, 0);
1715 /* For a nested function, when that function is compiled,
1716 mention the containing function name
1717 as well as (since dbx wants it) our own assembler-name. */
1719 fprintf (asmfile, ",%s,%s",
1720 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1721 IDENTIFIER_POINTER (DECL_NAME (context)));
1723 dbxout_finish_symbol (decl);
1728 /* This seems all wrong. Outputting most kinds of types gives no name
1729 at all. A true definition gives no name; a cross-ref for a
1730 structure can give the tag name, but not a type name.
1731 It seems that no typedef name is defined by outputting a type. */
1733 /* If this typedef name was defined by outputting the type,
1734 don't duplicate it. */
1735 if (typevec[TYPE_SYMTAB_ADDRESS (type)].status == TYPE_DEFINED
1736 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1739 /* Don't output the same typedef twice.
1740 And don't output what language-specific stuff doesn't want output. */
1741 if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl))
1750 if (DECL_NAME (decl))
1752 /* Nonzero means we must output a tag as well as a typedef. */
1755 /* Handle the case of a C++ structure or union
1756 where the TYPE_NAME is a TYPE_DECL
1757 which gives both a typedef name and a tag. */
1758 /* dbx requires the tag first and the typedef second. */
1759 if ((TREE_CODE (type) == RECORD_TYPE
1760 || TREE_CODE (type) == UNION_TYPE
1761 || TREE_CODE (type) == QUAL_UNION_TYPE)
1762 && TYPE_NAME (type) == decl
1763 && !(use_gnu_debug_info_extensions && have_used_extensions)
1764 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1765 /* Distinguish the implicit typedefs of C++
1766 from explicit ones that might be found in C. */
1767 && DECL_ARTIFICIAL (decl))
1769 tree name = TYPE_NAME (type);
1770 if (TREE_CODE (name) == TYPE_DECL)
1771 name = DECL_NAME (name);
1773 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1774 current_sym_value = 0;
1775 current_sym_addr = 0;
1776 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1778 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1779 IDENTIFIER_POINTER (name));
1780 dbxout_type (type, 1, 0);
1781 dbxout_finish_symbol (NULL_TREE);
1784 /* Output typedef name. */
1785 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1786 IDENTIFIER_POINTER (DECL_NAME (decl)));
1788 /* Short cut way to output a tag also. */
1789 if ((TREE_CODE (type) == RECORD_TYPE
1790 || TREE_CODE (type) == UNION_TYPE
1791 || TREE_CODE (type) == QUAL_UNION_TYPE)
1792 && TYPE_NAME (type) == decl
1793 /* Distinguish the implicit typedefs of C++
1794 from explicit ones that might be found in C. */
1795 && DECL_ARTIFICIAL (decl))
1797 if (use_gnu_debug_info_extensions && have_used_extensions)
1799 putc ('T', asmfile);
1800 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1802 #if 0 /* Now we generate the tag for this case up above. */
1808 putc ('t', asmfile);
1809 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1811 dbxout_type (type, 1, 0);
1812 dbxout_finish_symbol (decl);
1816 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1817 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1819 if (tag_needed && TYPE_NAME (type) != 0
1820 && (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE
1821 || (DECL_NAME (TYPE_NAME (type)) != 0))
1822 && TYPE_SIZE (type) != 0
1823 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1825 /* For a TYPE_DECL with no name, but the type has a name,
1827 This is what represents `struct foo' with no typedef. */
1828 /* In C++, the name of a type is the corresponding typedef.
1829 In C, it is an IDENTIFIER_NODE. */
1830 tree name = TYPE_NAME (type);
1831 if (TREE_CODE (name) == TYPE_DECL)
1832 name = DECL_NAME (name);
1834 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1835 current_sym_value = 0;
1836 current_sym_addr = 0;
1837 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1839 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1840 IDENTIFIER_POINTER (name));
1841 dbxout_type (type, 1, 0);
1842 dbxout_finish_symbol (NULL_TREE);
1846 /* If an enum type has no name, it cannot be referred to,
1847 but we must output it anyway, since the enumeration constants
1848 can be referred to. */
1849 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1851 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1852 current_sym_value = 0;
1853 current_sym_addr = 0;
1854 current_sym_nchars = 2;
1856 /* Some debuggers fail when given NULL names, so give this a
1857 harmless name of ` '. */
1858 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1859 dbxout_type (type, 1, 0);
1860 dbxout_finish_symbol (NULL_TREE);
1863 /* Prevent duplicate output of a typedef. */
1864 TREE_ASM_WRITTEN (decl) = 1;
1869 /* Parm decls go in their own separate chains
1870 and are output by dbxout_reg_parms and dbxout_parms. */
1874 /* Named return value, treat like a VAR_DECL. */
1876 if (DECL_RTL (decl) == 0)
1878 /* Don't mention a variable that is external.
1879 Let the file that defines it describe it. */
1880 if (DECL_EXTERNAL (decl))
1883 /* If the variable is really a constant
1884 and not written in memory, inform the debugger. */
1885 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1886 && DECL_INITIAL (decl) != 0
1887 && ! TREE_ASM_WRITTEN (decl)
1888 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1889 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1891 if (TREE_PUBLIC (decl) == 0)
1893 /* The sun4 assembler does not grok this. */
1894 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1895 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1896 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1898 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1899 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1900 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1902 fprintf (asmfile, "%s \"%s:c=i", ASM_STABS_OP, name);
1904 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC, ival);
1905 fprintf (asmfile, "\",0x%x,0,0,0\n", N_LSYM);
1909 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1911 /* don't know how to do this yet. */
1915 /* else it is something we handle like a normal variable. */
1918 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1919 #ifdef LEAF_REG_REMAP
1921 leaf_renumber_regs_insn (DECL_RTL (decl));
1924 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1932 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1933 Add SUFFIX to its name, if SUFFIX is not 0.
1934 Describe the variable as residing in HOME
1935 (usually HOME is DECL_RTL (DECL), but not always). */
1938 dbxout_symbol_location (decl, type, suffix, home)
1946 /* Don't mention a variable at all
1947 if it was completely optimized into nothingness.
1949 If the decl was from an inline function, then it's rtl
1950 is not identically the rtl that was used in this
1951 particular compilation. */
1952 if (GET_CODE (home) == REG)
1954 regno = REGNO (home);
1955 if (regno >= FIRST_PSEUDO_REGISTER)
1958 else if (GET_CODE (home) == SUBREG)
1962 while (GET_CODE (value) == SUBREG)
1964 offset += SUBREG_WORD (value);
1965 value = SUBREG_REG (value);
1967 if (GET_CODE (value) == REG)
1969 regno = REGNO (value);
1970 if (regno >= FIRST_PSEUDO_REGISTER)
1974 alter_subreg (home);
1977 /* The kind-of-variable letter depends on where
1978 the variable is and on the scope of its name:
1979 G and N_GSYM for static storage and global scope,
1980 S for static storage and file scope,
1981 V for static storage and local scope,
1982 for those two, use N_LCSYM if data is in bss segment,
1983 N_STSYM if in data segment, N_FUN otherwise.
1984 (We used N_FUN originally, then changed to N_STSYM
1985 to please GDB. However, it seems that confused ld.
1986 Now GDB has been fixed to like N_FUN, says Kingdon.)
1987 no letter at all, and N_LSYM, for auto variable,
1988 r and N_RSYM for register variable. */
1990 if (GET_CODE (home) == MEM
1991 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1993 if (TREE_PUBLIC (decl))
1996 current_sym_code = N_GSYM;
2000 current_sym_addr = XEXP (home, 0);
2002 letter = decl_function_context (decl) ? 'V' : 'S';
2004 /* This should be the same condition as in assemble_variable, but
2005 we don't have access to dont_output_data here. So, instead,
2006 we rely on the fact that error_mark_node initializers always
2007 end up in bss for C++ and never end up in bss for C. */
2008 if (DECL_INITIAL (decl) == 0
2009 || (!strcmp (lang_identify (), "cplusplus")
2010 && DECL_INITIAL (decl) == error_mark_node))
2011 current_sym_code = N_LCSYM;
2012 else if (DECL_IN_TEXT_SECTION (decl))
2013 /* This is not quite right, but it's the closest
2014 of all the codes that Unix defines. */
2015 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
2018 /* Ultrix `as' seems to need this. */
2019 #ifdef DBX_STATIC_STAB_DATA_SECTION
2022 current_sym_code = N_STSYM;
2026 else if (regno >= 0)
2029 current_sym_code = N_RSYM;
2030 current_sym_value = DBX_REGISTER_NUMBER (regno);
2032 else if (GET_CODE (home) == MEM
2033 && (GET_CODE (XEXP (home, 0)) == MEM
2034 || (GET_CODE (XEXP (home, 0)) == REG
2035 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM
2036 && REGNO (XEXP (home, 0)) != STACK_POINTER_REGNUM
2037 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2038 && REGNO (XEXP (home, 0)) != ARG_POINTER_REGNUM
2041 /* If the value is indirect by memory or by a register
2042 that isn't the frame pointer
2043 then it means the object is variable-sized and address through
2044 that register or stack slot. DBX has no way to represent this
2045 so all we can do is output the variable as a pointer.
2046 If it's not a parameter, ignore it.
2047 (VAR_DECLs like this can be made by integrate.c.) */
2049 if (GET_CODE (XEXP (home, 0)) == REG)
2052 current_sym_code = N_RSYM;
2053 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
2057 current_sym_code = N_LSYM;
2058 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2059 We want the value of that CONST_INT. */
2061 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
2064 /* Effectively do build_pointer_type, but don't cache this type,
2065 since it might be temporary whereas the type it points to
2066 might have been saved for inlining. */
2067 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2068 type = make_node (POINTER_TYPE);
2069 TREE_TYPE (type) = TREE_TYPE (decl);
2071 else if (GET_CODE (home) == MEM
2072 && GET_CODE (XEXP (home, 0)) == REG)
2074 current_sym_code = N_LSYM;
2075 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2077 else if (GET_CODE (home) == MEM
2078 && GET_CODE (XEXP (home, 0)) == PLUS
2079 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
2081 current_sym_code = N_LSYM;
2082 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2083 We want the value of that CONST_INT. */
2084 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2086 else if (GET_CODE (home) == MEM
2087 && GET_CODE (XEXP (home, 0)) == CONST)
2089 /* Handle an obscure case which can arise when optimizing and
2090 when there are few available registers. (This is *always*
2091 the case for i386/i486 targets). The RTL looks like
2092 (MEM (CONST ...)) even though this variable is a local `auto'
2093 or a local `register' variable. In effect, what has happened
2094 is that the reload pass has seen that all assignments and
2095 references for one such a local variable can be replaced by
2096 equivalent assignments and references to some static storage
2097 variable, thereby avoiding the need for a register. In such
2098 cases we're forced to lie to debuggers and tell them that
2099 this variable was itself `static'. */
2100 current_sym_code = N_LCSYM;
2102 current_sym_addr = XEXP (XEXP (home, 0), 0);
2104 else if (GET_CODE (home) == CONCAT)
2106 tree subtype = TREE_TYPE (type);
2108 /* If the variable's storage is in two parts,
2109 output each as a separate stab with a modified name. */
2110 if (WORDS_BIG_ENDIAN)
2111 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
2113 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
2115 /* Cast avoids warning in old compilers. */
2116 current_sym_code = (STAB_CODE_TYPE) 0;
2117 current_sym_value = 0;
2118 current_sym_addr = 0;
2119 dbxout_prepare_symbol (decl);
2121 if (WORDS_BIG_ENDIAN)
2122 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
2124 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
2128 /* Address might be a MEM, when DECL is a variable-sized object.
2129 Or it might be const0_rtx, meaning previous passes
2130 want us to ignore this variable. */
2133 /* Ok, start a symtab entry and output the variable name. */
2136 #ifdef DBX_STATIC_BLOCK_START
2137 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
2140 dbxout_symbol_name (decl, suffix, letter);
2141 dbxout_type (type, 0, 0);
2142 dbxout_finish_symbol (decl);
2144 #ifdef DBX_STATIC_BLOCK_END
2145 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
2149 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2150 Then output LETTER to indicate the kind of location the symbol has. */
2153 dbxout_symbol_name (decl, suffix, letter)
2158 /* One slight hitch: if this is a VAR_DECL which is a static
2159 class member, we must put out the mangled name instead of the
2160 DECL_NAME. Note also that static member (variable) names DO NOT begin
2161 with underscores in .stabs directives. */
2162 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
2165 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
2166 (suffix ? suffix : ""));
2168 if (letter) putc (letter, asmfile);
2172 dbxout_prepare_symbol (decl)
2176 char *filename = DECL_SOURCE_FILE (decl);
2178 dbxout_source_file (asmfile, filename);
2183 dbxout_finish_symbol (sym)
2186 #ifdef DBX_FINISH_SYMBOL
2187 DBX_FINISH_SYMBOL (sym);
2190 if (use_gnu_debug_info_extensions && sym != 0)
2191 line = DECL_SOURCE_LINE (sym);
2193 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2194 if (current_sym_addr)
2195 output_addr_const (asmfile, current_sym_addr);
2197 fprintf (asmfile, "%d", current_sym_value);
2198 putc ('\n', asmfile);
2202 /* Output definitions of all the decls in a chain. */
2210 dbxout_symbol (syms, 1);
2211 syms = TREE_CHAIN (syms);
2215 /* The following two functions output definitions of function parameters.
2216 Each parameter gets a definition locating it in the parameter list.
2217 Each parameter that is a register variable gets a second definition
2218 locating it in the register.
2220 Printing or argument lists in gdb uses the definitions that
2221 locate in the parameter list. But reference to the variable in
2222 expressions uses preferentially the definition as a register. */
2224 /* Output definitions, referring to storage in the parmlist,
2225 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2228 dbxout_parms (parms)
2231 for (; parms; parms = TREE_CHAIN (parms))
2232 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2234 dbxout_prepare_symbol (parms);
2236 /* Perform any necessary register eliminations on the parameter's rtl,
2237 so that the debugging output will be accurate. */
2238 DECL_INCOMING_RTL (parms)
2239 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2240 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2241 #ifdef LEAF_REG_REMAP
2244 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2245 leaf_renumber_regs_insn (DECL_RTL (parms));
2249 if (PARM_PASSED_IN_MEMORY (parms))
2251 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2253 /* ??? Here we assume that the parm address is indexed
2254 off the frame pointer or arg pointer.
2255 If that is not true, we produce meaningless results,
2256 but do not crash. */
2257 if (GET_CODE (addr) == PLUS
2258 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2259 current_sym_value = INTVAL (XEXP (addr, 1));
2261 current_sym_value = 0;
2263 current_sym_code = N_PSYM;
2264 current_sym_addr = 0;
2267 if (DECL_NAME (parms))
2269 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2271 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2272 IDENTIFIER_POINTER (DECL_NAME (parms)),
2273 DBX_MEMPARM_STABS_LETTER);
2277 current_sym_nchars = 8;
2278 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2279 DBX_MEMPARM_STABS_LETTER);
2282 /* It is quite tempting to use:
2284 dbxout_type (TREE_TYPE (parms), 0, 0);
2286 as the next statement, rather than using DECL_ARG_TYPE(), so
2287 that gcc reports the actual type of the parameter, rather
2288 than the promoted type. This certainly makes GDB's life
2289 easier, at least for some ports. The change is a bad idea
2290 however, since GDB expects to be able access the type without
2291 performing any conversions. So for example, if we were
2292 passing a float to an unprototyped function, gcc will store a
2293 double on the stack, but if we emit a stab saying the type is a
2294 float, then gdb will only read in a single value, and this will
2295 produce an erropneous value. */
2296 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2297 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2298 dbxout_finish_symbol (parms);
2300 else if (GET_CODE (DECL_RTL (parms)) == REG)
2303 char regparm_letter;
2305 /* Parm passed in registers and lives in registers or nowhere. */
2307 current_sym_code = DBX_REGPARM_STABS_CODE;
2308 regparm_letter = DBX_REGPARM_STABS_LETTER;
2309 current_sym_addr = 0;
2311 /* If parm lives in a register, use that register;
2312 pretend the parm was passed there. It would be more consistent
2313 to describe the register where the parm was passed,
2314 but in practice that register usually holds something else.
2316 If we use DECL_RTL, then we must use the declared type of
2317 the variable, not the type that it arrived in. */
2318 if (REGNO (DECL_RTL (parms)) >= 0
2319 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2321 best_rtl = DECL_RTL (parms);
2322 parm_type = TREE_TYPE (parms);
2324 /* If the parm lives nowhere, use the register where it was
2325 passed. It is also better to use the declared type here. */
2328 best_rtl = DECL_INCOMING_RTL (parms);
2329 parm_type = TREE_TYPE (parms);
2331 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2334 if (DECL_NAME (parms))
2336 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2337 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2338 IDENTIFIER_POINTER (DECL_NAME (parms)),
2343 current_sym_nchars = 8;
2344 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2348 dbxout_type (parm_type, 0, 0);
2349 dbxout_finish_symbol (parms);
2351 else if (GET_CODE (DECL_RTL (parms)) == MEM
2352 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2353 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2354 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2355 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2356 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2360 /* Parm was passed via invisible reference.
2361 That is, its address was passed in a register.
2362 Output it as if it lived in that register.
2363 The debugger will know from the type
2364 that it was actually passed by invisible reference. */
2366 char regparm_letter;
2367 /* Parm passed in registers and lives in registers or nowhere. */
2369 current_sym_code = DBX_REGPARM_STABS_CODE;
2370 if (use_gnu_debug_info_extensions)
2371 regparm_letter = GDB_INV_REF_REGPARM_STABS_LETTER;
2373 regparm_letter = DBX_REGPARM_STABS_LETTER;
2375 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2376 If it is an unallocated pseudo-reg, then use the register where
2377 it was passed instead. */
2378 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2379 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2380 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2382 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2384 current_sym_addr = 0;
2387 if (DECL_NAME (parms))
2389 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2391 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2392 IDENTIFIER_POINTER (DECL_NAME (parms)),
2397 current_sym_nchars = 8;
2398 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2402 dbxout_type (TREE_TYPE (parms), 0, 0);
2403 dbxout_finish_symbol (parms);
2405 else if (GET_CODE (DECL_RTL (parms)) == MEM
2406 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2407 /* ??? A constant address for a parm can happen
2408 when the reg it lives in is equiv to a constant in memory.
2409 Should make this not happen, after 2.4. */
2410 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2412 /* Parm was passed in registers but lives on the stack. */
2414 current_sym_code = N_PSYM;
2415 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2416 in which case we want the value of that CONST_INT,
2417 or (MEM (REG ...)) or (MEM (MEM ...)),
2418 in which case we use a value of zero. */
2419 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2420 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2421 current_sym_value = 0;
2423 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2424 current_sym_addr = 0;
2426 /* Make a big endian correction if the mode of the type of the
2427 parameter is not the same as the mode of the rtl. */
2428 if (BYTES_BIG_ENDIAN
2429 && TYPE_MODE (TREE_TYPE (parms)) != GET_MODE (DECL_RTL (parms))
2430 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms))) < UNITS_PER_WORD)
2432 current_sym_value += UNITS_PER_WORD - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms)));
2436 if (DECL_NAME (parms))
2438 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2440 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2441 IDENTIFIER_POINTER (DECL_NAME (parms)),
2442 DBX_MEMPARM_STABS_LETTER);
2446 current_sym_nchars = 8;
2447 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2448 DBX_MEMPARM_STABS_LETTER);
2452 = DEBUGGER_ARG_OFFSET (current_sym_value,
2453 XEXP (DECL_RTL (parms), 0));
2454 dbxout_type (TREE_TYPE (parms), 0, 0);
2455 dbxout_finish_symbol (parms);
2460 /* Output definitions for the places where parms live during the function,
2461 when different from where they were passed, when the parms were passed
2464 It is not useful to do this for parms passed in registers
2465 that live during the function in different registers, because it is
2466 impossible to look in the passed register for the passed value,
2467 so we use the within-the-function register to begin with.
2469 PARMS is a chain of PARM_DECL nodes. */
2472 dbxout_reg_parms (parms)
2475 for (; parms; parms = TREE_CHAIN (parms))
2476 if (DECL_NAME (parms) && PARM_PASSED_IN_MEMORY (parms))
2478 dbxout_prepare_symbol (parms);
2480 /* Report parms that live in registers during the function
2481 but were passed in memory. */
2482 if (GET_CODE (DECL_RTL (parms)) == REG
2483 && REGNO (DECL_RTL (parms)) >= 0
2484 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2485 dbxout_symbol_location (parms, TREE_TYPE (parms),
2486 0, DECL_RTL (parms));
2487 else if (GET_CODE (DECL_RTL (parms)) == CONCAT)
2488 dbxout_symbol_location (parms, TREE_TYPE (parms),
2489 0, DECL_RTL (parms));
2490 /* Report parms that live in memory but not where they were passed. */
2491 else if (GET_CODE (DECL_RTL (parms)) == MEM
2492 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2493 dbxout_symbol_location (parms, TREE_TYPE (parms),
2494 0, DECL_RTL (parms));
2498 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2499 output definitions of those names, in raw form */
2507 putc (',', asmfile);
2508 dbxout_type (TREE_VALUE (args), 0, 0);
2510 args = TREE_CHAIN (args);
2514 /* Given a chain of ..._TYPE nodes,
2515 find those which have typedef names and output those names.
2516 This is to ensure those types get output. */
2519 dbxout_types (types)
2520 register tree types;
2524 if (TYPE_NAME (types)
2525 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2526 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2527 dbxout_symbol (TYPE_NAME (types), 1);
2528 types = TREE_CHAIN (types);
2532 /* Output everything about a symbol block (a BLOCK node
2533 that represents a scope level),
2534 including recursive output of contained blocks.
2536 BLOCK is the BLOCK node.
2537 DEPTH is its depth within containing symbol blocks.
2538 ARGS is usually zero; but for the outermost block of the
2539 body of a function, it is a chain of PARM_DECLs for the function parameters.
2540 We output definitions of all the register parms
2541 as if they were local variables of that block.
2543 If -g1 was used, we count blocks just the same, but output nothing
2544 except for the outermost block.
2546 Actually, BLOCK may be several blocks chained together.
2547 We handle them all in sequence. */
2550 dbxout_block (block, depth, args)
2551 register tree block;
2559 /* Ignore blocks never expanded or otherwise marked as real. */
2560 if (TREE_USED (block))
2562 #ifndef DBX_LBRAC_FIRST
2563 /* In dbx format, the syms of a block come before the N_LBRAC. */
2564 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2565 dbxout_syms (BLOCK_VARS (block));
2567 dbxout_reg_parms (args);
2570 /* Now output an N_LBRAC symbol to represent the beginning of
2571 the block. Use the block's tree-walk order to generate
2572 the assembler symbols LBBn and LBEn
2573 that final will define around the code in this block. */
2574 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2577 blocknum = next_block_number++;
2578 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2580 if (BLOCK_HANDLER_BLOCK (block))
2582 /* A catch block. Must precede N_LBRAC. */
2583 tree decl = BLOCK_VARS (block);
2586 #ifdef DBX_OUTPUT_CATCH
2587 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2589 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2590 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2591 assemble_name (asmfile, buf);
2592 fprintf (asmfile, "\n");
2594 decl = TREE_CHAIN (decl);
2598 #ifdef DBX_OUTPUT_LBRAC
2599 DBX_OUTPUT_LBRAC (asmfile, buf);
2601 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2602 assemble_name (asmfile, buf);
2603 #if DBX_BLOCKS_FUNCTION_RELATIVE
2604 fputc ('-', asmfile);
2605 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2607 fprintf (asmfile, "\n");
2611 /* Count blocks the same way regardless of debug_info_level. */
2612 next_block_number++;
2614 #ifdef DBX_LBRAC_FIRST
2615 /* On some weird machines, the syms of a block
2616 come after the N_LBRAC. */
2617 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2618 dbxout_syms (BLOCK_VARS (block));
2620 dbxout_reg_parms (args);
2623 /* Output the subblocks. */
2624 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2626 /* Refer to the marker for the end of the block. */
2627 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2630 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2631 #ifdef DBX_OUTPUT_RBRAC
2632 DBX_OUTPUT_RBRAC (asmfile, buf);
2634 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2635 assemble_name (asmfile, buf);
2636 #if DBX_BLOCKS_FUNCTION_RELATIVE
2637 fputc ('-', asmfile);
2638 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2640 fprintf (asmfile, "\n");
2644 block = BLOCK_CHAIN (block);
2648 /* Output the information about a function and its arguments and result.
2649 Usually this follows the function's code,
2650 but on some systems, it comes before. */
2653 dbxout_really_begin_function (decl)
2656 dbxout_symbol (decl, 0);
2657 dbxout_parms (DECL_ARGUMENTS (decl));
2658 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2659 dbxout_symbol (DECL_RESULT (decl), 1);
2662 /* Called at beginning of output of function definition. */
2665 dbxout_begin_function (decl)
2668 #ifdef DBX_FUNCTION_FIRST
2669 dbxout_really_begin_function (decl);
2673 /* Output dbx data for a function definition.
2674 This includes a definition of the function name itself (a symbol),
2675 definitions of the parameters (locating them in the parameter list)
2676 and then output the block that makes up the function's body
2677 (including all the auto variables of the function). */
2680 dbxout_function (decl)
2683 #ifndef DBX_FUNCTION_FIRST
2684 dbxout_really_begin_function (decl);
2686 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2687 #ifdef DBX_OUTPUT_FUNCTION_END
2688 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2690 #if defined(ASM_OUTPUT_SECTION_NAME)
2691 if (use_gnu_debug_info_extensions
2692 #if defined(NO_DBX_FUNCTION_END)
2693 && ! NO_DBX_FUNCTION_END
2696 dbxout_function_end ();
2699 #endif /* DBX_DEBUGGING_INFO */