1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
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.
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.
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.
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
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.
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.
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.
64 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
65 output while in the text section.
67 For more on data type definitions, see `dbxout_type'. */
69 /* Include these first, because they may define MIN and MAX. */
78 #include "insn-config.h"
81 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
87 #ifdef XCOFF_DEBUGGING_INFO
92 #define ASM_STABS_OP ".stabs"
96 #define ASM_STABN_OP ".stabn"
99 #ifndef DBX_TYPE_DECL_STABS_CODE
100 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
103 #ifndef DBX_STATIC_CONST_VAR_CODE
104 #define DBX_STATIC_CONST_VAR_CODE N_FUN
107 #ifndef DBX_REGPARM_STABS_CODE
108 #define DBX_REGPARM_STABS_CODE N_RSYM
111 #ifndef DBX_REGPARM_STABS_LETTER
112 #define DBX_REGPARM_STABS_LETTER 'P'
115 #ifndef DBX_MEMPARM_STABS_LETTER
116 #define DBX_MEMPARM_STABS_LETTER 'p'
119 #ifndef FILE_NAME_JOINER
120 #define FILE_NAME_JOINER "/"
123 /* Nonzero means if the type has methods, only output debugging
124 information if methods are actually written to the asm file. */
126 static int flag_minimal_debug = 1;
128 /* Nonzero if we have actually used any of the GDB extensions
129 to the debugging format. The idea is that we use them for the
130 first time only if there's a strong reason, but once we have done that,
131 we use them whenever convenient. */
133 static int have_used_extensions = 0;
135 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
136 for the N_SO filename stabs label. */
138 static int source_label_number = 1;
142 /* Typical USG systems don't have stab.h, and they also have
143 no use for DBX-format debugging info. */
145 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
147 #ifdef DEBUG_SYMS_TEXT
148 #define FORCE_TEXT text_section ();
153 #if defined (USG) || defined (NO_STAB_H)
154 #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */
156 #include <stab.h> /* On BSD, use the system's stab.h. */
158 /* This is a GNU extension we need to reference in this file. */
165 #define STAB_CODE_TYPE enum __stab_debug_code
167 #define STAB_CODE_TYPE int
170 /* 1 if PARM is passed to this function in memory. */
172 #define PARM_PASSED_IN_MEMORY(PARM) \
173 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
175 /* A C expression for the integer offset value of an automatic variable
176 (N_LSYM) having address X (an RTX). */
177 #ifndef DEBUGGER_AUTO_OFFSET
178 #define DEBUGGER_AUTO_OFFSET(X) \
179 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
182 /* A C expression for the integer offset value of an argument (N_PSYM)
183 having address X (an RTX). The nominal offset is OFFSET. */
184 #ifndef DEBUGGER_ARG_OFFSET
185 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
188 /* Stream for writing to assembler file. */
190 static FILE *asmfile;
192 /* Last source file name mentioned in a NOTE insn. */
194 static char *lastfile;
196 /* Current working directory. */
200 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED};
202 /* Vector recording the status of describing C data types.
203 When we first notice a data type (a tree node),
204 we assign it a number using next_type_number.
205 That is its index in this vector.
206 The vector element says whether we have yet output
207 the definition of the type. TYPE_XREF says we have
208 output it as a cross-reference only. */
210 enum typestatus *typevec;
212 /* Number of elements of space allocated in `typevec'. */
214 static int typevec_len;
216 /* In dbx output, each type gets a unique number.
217 This is the number for the next type output.
218 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
220 static int next_type_number;
222 /* In dbx output, we must assign symbol-blocks id numbers
223 in the order in which their beginnings are encountered.
224 We output debugging info that refers to the beginning and
225 end of the ranges of code in each block
226 with assembler labels LBBn and LBEn, where n is the block number.
227 The labels are generated in final, which assigns numbers to the
228 blocks in the same way. */
230 static int next_block_number;
232 /* These variables are for dbxout_symbol to communicate to
233 dbxout_finish_symbol.
234 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
235 current_sym_value and current_sym_addr are two ways to address the
236 value to store in the symtab entry.
237 current_sym_addr if nonzero represents the value as an rtx.
238 If that is zero, current_sym_value is used. This is used
239 when the value is an offset (such as for auto variables,
240 register variables and parms). */
242 static STAB_CODE_TYPE current_sym_code;
243 static int current_sym_value;
244 static rtx current_sym_addr;
246 /* Number of chars of symbol-description generated so far for the
247 current symbol. Used by CHARS and CONTIN. */
249 static int current_sym_nchars;
251 /* Report having output N chars of the current symbol-description. */
253 #define CHARS(N) (current_sym_nchars += (N))
255 /* Break the current symbol-description, generating a continuation,
256 if it has become long. */
258 #ifndef DBX_CONTIN_LENGTH
259 #define DBX_CONTIN_LENGTH 80
262 #if DBX_CONTIN_LENGTH > 0
264 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
269 void dbxout_types ();
271 void dbxout_symbol ();
272 static void dbxout_type_name ();
273 static void dbxout_type ();
274 static void dbxout_typedefs ();
275 static void dbxout_symbol_name ();
276 static void dbxout_symbol_location ();
277 static void dbxout_prepare_symbol ();
278 static void dbxout_finish_symbol ();
279 static void dbxout_continue ();
280 static void print_int_cst_octal ();
281 static void print_octal ();
283 #if 0 /* Not clear we will actually need this. */
285 /* Return the absolutized filename for the given relative
286 filename. Note that if that filename is already absolute, it may
287 still be returned in a modified form because this routine also
288 eliminates redundant slashes and single dots and eliminates double
289 dots to get a shortest possible filename from the given input
290 filename. The absolutization of relative filenames is made by
291 assuming that the given filename is to be taken as relative to
292 the first argument (cwd) or to the current directory if cwd is
296 abspath (rel_filename)
299 /* Setup the current working directory as needed. */
301 = (char *) alloca (strlen (cwd) + strlen (rel_filename) + 1);
302 char *endp = abs_buffer;
306 /* Copy the filename (possibly preceded by the current working
307 directory name) into the absolutization buffer. */
312 if (rel_filename[0] != '/')
315 while (*endp++ = *src_p++)
317 *(endp-1) = '/'; /* overwrite null */
319 src_p = rel_filename;
320 while (*endp++ = *src_p++)
325 /* Now make a copy of abs_buffer into abs_buffer, shortening the
326 filename (by taking out slashes and dots) as we go. */
328 outp = inp = abs_buffer;
329 *outp++ = *inp++; /* copy first slash */
334 else if (inp[0] == '/' && outp[-1] == '/')
339 else if (inp[0] == '.' && outp[-1] == '/')
343 else if (inp[1] == '/')
348 else if ((inp[1] == '.') && (inp[2] == 0 || inp[2] == '/'))
350 inp += (inp[2] == '/') ? 3 : 2;
352 while (outp >= abs_buffer && *outp != '/')
354 if (outp < abs_buffer)
356 /* Catch cases like /.. where we try to backup to a
357 point above the absolute root of the logical file
360 fprintf (stderr, "%s: invalid file name: %s\n",
361 pname, rel_filename);
371 /* On exit, make sure that there is a trailing null, and make sure that
372 the last character of the returned string is *not* a slash. */
378 /* Make a copy (in the heap) of the stuff left in the absolutization
379 buffer and return a pointer to the copy. */
381 value = (char *) oballoc (strlen (abs_buffer) + 1);
382 strcpy (value, abs_buffer);
387 /* At the beginning of compilation, start writing the symbol table.
388 Initialize `typevec' and output the standard data types of C. */
391 dbxout_init (asm_file, input_file_name, syms)
393 char *input_file_name;
396 char ltext_label_name[100];
401 typevec = (enum typestatus *) xmalloc (typevec_len * sizeof typevec[0]);
402 bzero (typevec, typevec_len * sizeof typevec[0]);
404 /* Convert Ltext into the appropriate format for local labels in case
405 the system doesn't insert underscores in front of user generated
407 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
409 /* Put the current working directory in an N_SO symbol. */
410 #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this,
411 but GDB always does. */
412 if (use_gnu_debug_info_extensions)
415 if (!cwd && (cwd = getpwd ()) && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
417 char *wdslash = xmalloc (strlen (cwd) + sizeof (FILE_NAME_JOINER));
418 sprintf (wdslash, "%s%s", cwd, FILE_NAME_JOINER);
423 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
424 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd);
425 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
426 fprintf (asmfile, "%s ", ASM_STABS_OP);
427 output_quoted_string (asmfile, cwd);
428 fprintf (asmfile, ",%d,0,0,%s\n", N_SO, <ext_label_name[1]);
429 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
433 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
434 /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That
435 would give us an N_SOL, and we want an N_SO. */
436 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
437 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
438 /* We include outputting `Ltext:' here,
439 because that gives you a way to override it. */
440 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
441 fprintf (asmfile, "%s ", ASM_STABS_OP);
442 output_quoted_string (asmfile, input_file_name);
443 fprintf (asmfile, ",%d,0,0,%s\n",
444 N_SO, <ext_label_name[1]);
446 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", 0);
447 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
449 /* Possibly output something to inform GDB that this compilation was by
450 GCC. It's easier for GDB to parse it when after the N_SO's. This
451 is used in Solaris 2. */
452 #ifdef ASM_IDENTIFY_GCC_AFTER_SOURCE
453 ASM_IDENTIFY_GCC_AFTER_SOURCE (asmfile);
456 lastfile = input_file_name;
458 next_type_number = 1;
459 next_block_number = 2;
461 /* Make sure that types `int' and `char' have numbers 1 and 2.
462 Definitions of other integer types will refer to those numbers.
463 (Actually it should no longer matter what their numbers are.
464 Also, if any types with tags have been defined, dbxout_symbol
465 will output them first, so the numbers won't be 1 and 2. That
466 happens in C++. So it's a good thing it should no longer matter). */
468 #ifdef DBX_OUTPUT_STANDARD_TYPES
469 DBX_OUTPUT_STANDARD_TYPES (syms);
471 dbxout_symbol (TYPE_NAME (integer_type_node), 0);
472 dbxout_symbol (TYPE_NAME (char_type_node), 0);
475 /* Get all permanent types that have typedef names,
476 and output them all, except for those already output. */
478 dbxout_typedefs (syms);
481 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
482 in the reverse order from that which is found in SYMS. */
485 dbxout_typedefs (syms)
490 dbxout_typedefs (TREE_CHAIN (syms));
491 if (TREE_CODE (syms) == TYPE_DECL)
493 tree type = TREE_TYPE (syms);
495 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
496 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
497 dbxout_symbol (TYPE_NAME (type), 0);
502 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
505 dbxout_source_file (file, filename)
509 char ltext_label_name[100];
511 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
513 #ifdef DBX_OUTPUT_SOURCE_FILENAME
514 DBX_OUTPUT_SOURCE_FILENAME (file, filename);
516 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext",
517 source_label_number);
518 fprintf (file, "%s ", ASM_STABS_OP);
519 output_quoted_string (file, filename);
520 fprintf (file, ",%d,0,0,%s\n", N_SOL, <ext_label_name[1]);
522 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", source_label_number++);
528 /* Output a line number symbol entry into output stream FILE,
529 for source file FILENAME and line number LINENO. */
532 dbxout_source_line (file, filename, lineno)
537 dbxout_source_file (file, filename);
539 #ifdef ASM_OUTPUT_SOURCE_LINE
540 ASM_OUTPUT_SOURCE_LINE (file, lineno);
542 fprintf (file, "\t%s %d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
546 /* At the end of compilation, finish writing the symbol table.
547 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
551 dbxout_finish (file, filename)
555 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
556 DBX_OUTPUT_MAIN_SOURCE_FILE_END (file, filename);
557 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
560 /* Continue a symbol-description that gets too big.
561 End one symbol table entry with a double-backslash
562 and start a new one, eventually producing something like
563 .stabs "start......\\",code,0,value
564 .stabs "...rest",code,0,value */
569 #ifdef DBX_CONTIN_CHAR
570 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
572 fprintf (asmfile, "\\\\");
574 dbxout_finish_symbol (NULL_TREE);
575 fprintf (asmfile, "%s \"", ASM_STABS_OP);
576 current_sym_nchars = 0;
579 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
580 This must be a separate function because anonymous unions require
584 dbxout_type_fields (type)
588 /* Output the name, type, position (in bits), size (in bits) of each
590 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
592 /* Omit here local type decls until we know how to support them. */
593 if (TREE_CODE (tem) == TYPE_DECL)
595 /* Omit fields whose position or size are variable. */
596 else if (TREE_CODE (tem) == FIELD_DECL
597 && (TREE_CODE (DECL_FIELD_BITPOS (tem)) != INTEGER_CST
598 || TREE_CODE (DECL_SIZE (tem)) != INTEGER_CST))
600 /* Omit here the nameless fields that are used to skip bits. */
601 else if (TREE_CODE (tem) != CONST_DECL)
603 /* Continue the line if necessary,
604 but not before the first field. */
605 if (tem != TYPE_FIELDS (type))
608 if (use_gnu_debug_info_extensions
609 && flag_minimal_debug
610 && TREE_CODE (tem) == FIELD_DECL
611 && DECL_VIRTUAL_P (tem)
612 && DECL_ASSEMBLER_NAME (tem))
614 have_used_extensions = 1;
615 CHARS (3 + IDENTIFIER_LENGTH (DECL_NAME (TYPE_NAME (DECL_FCONTEXT (tem)))));
616 fputs (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)), asmfile);
617 dbxout_type (DECL_FCONTEXT (tem), 0, 0);
618 fprintf (asmfile, ":");
619 dbxout_type (TREE_TYPE (tem), 0, 0);
620 fprintf (asmfile, ",%d;",
621 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
627 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
628 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
632 fprintf (asmfile, ":");
636 if (use_gnu_debug_info_extensions
637 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
638 || TREE_CODE (tem) != FIELD_DECL))
640 have_used_extensions = 1;
642 putc ((TREE_PRIVATE (tem) ? '0'
643 : TREE_PROTECTED (tem) ? '1' : '2'),
648 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
649 && DECL_BIT_FIELD_TYPE (tem))
650 ? DECL_BIT_FIELD_TYPE (tem)
651 : TREE_TYPE (tem), 0, 0);
653 if (TREE_CODE (tem) == VAR_DECL)
655 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
657 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
658 have_used_extensions = 1;
659 fprintf (asmfile, ":%s;", name);
660 CHARS (strlen (name));
664 /* If TEM is non-static, GDB won't understand it. */
665 fprintf (asmfile, ",0,0;");
668 else if (TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
670 fprintf (asmfile, ",%d,%d;",
671 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)),
672 TREE_INT_CST_LOW (DECL_SIZE (tem)));
679 /* Subroutine of `dbxout_type_methods'. Output debug info about the
680 method described DECL. DEBUG_NAME is an encoding of the method's
681 type signature. ??? We may be able to do without DEBUG_NAME altogether
685 dbxout_type_method_1 (decl, debug_name)
689 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
692 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
694 else /* it's a METHOD_TYPE. */
696 /* A for normal functions.
697 B for `const' member functions.
698 C for `volatile' member functions.
699 D for `const volatile' member functions. */
700 if (TYPE_READONLY (TREE_TYPE (firstarg)))
702 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
705 if (DECL_VINDEX (decl))
711 fprintf (asmfile, ":%s;%c%c%c", debug_name,
712 TREE_PRIVATE (decl) ? '0' : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
713 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
714 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
715 if (DECL_VINDEX (decl))
717 fprintf (asmfile, "%d;",
718 TREE_INT_CST_LOW (DECL_VINDEX (decl)));
719 dbxout_type (DECL_CONTEXT (decl), 0, 0);
720 fprintf (asmfile, ";");
725 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
729 dbxout_type_methods (type)
732 /* C++: put out the method names and their parameter lists */
733 tree methods = TYPE_METHODS (type);
735 register tree fndecl;
737 char formatted_type_identifier_length[16];
738 register int type_identifier_length;
740 if (methods == NULL_TREE)
743 type_encoding = DECL_NAME (TYPE_NAME (type));
745 /* C++: Template classes break some assumptions made by this code about
746 the class names, constructor names, and encodings for assembler
747 label names. For now, disable output of dbx info for them. */
749 char *ptr = IDENTIFIER_POINTER (type_encoding);
750 /* This should use index. (mrs) */
751 while (*ptr && *ptr != '<') ptr++;
758 #ifdef HAVE_TEMPLATES
759 if (warn_template_debugging)
760 warning ("dbx info for template class methods not yet supported");
767 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
769 sprintf(formatted_type_identifier_length, "%d", type_identifier_length);
771 if (TREE_CODE (methods) == FUNCTION_DECL)
773 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
774 fndecl = TREE_VEC_ELT (methods, 0);
776 fndecl = TREE_VEC_ELT (methods, 1);
780 tree name = DECL_NAME (fndecl);
783 /* Group together all the methods for the same operation.
784 These differ in the types of the arguments. */
785 for (last = NULL_TREE;
786 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
787 fndecl = TREE_CHAIN (fndecl))
788 /* Output the name of the field (after overloading), as
789 well as the name of the field before overloading, along
790 with its parameter list */
792 /* This is the "mangled" name of the method.
793 It encodes the argument types. */
794 char *debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
801 if (DECL_IGNORED_P (fndecl))
804 if (flag_minimal_debug)
806 /* Detect ordinary methods because their mangled names
807 start with the operation name. */
808 if (!strncmp (IDENTIFIER_POINTER (name), debug_name,
809 IDENTIFIER_LENGTH (name)))
811 debug_name += IDENTIFIER_LENGTH (name);
812 if (debug_name[0] == '_' && debug_name[1] == '_')
814 char *method_name = debug_name + 2;
815 char *length_ptr = formatted_type_identifier_length;
816 /* Get past const and volatile qualifiers. */
817 while (*method_name == 'C' || *method_name == 'V')
819 /* Skip digits for length of type_encoding. */
820 while (*method_name == *length_ptr && *length_ptr)
821 length_ptr++, method_name++;
822 if (! strncmp (method_name,
823 IDENTIFIER_POINTER (type_encoding),
824 type_identifier_length))
825 method_name += type_identifier_length;
826 debug_name = method_name;
829 /* Detect constructors by their style of name mangling. */
830 else if (debug_name[0] == '_' && debug_name[1] == '_')
832 char *ctor_name = debug_name + 2;
833 char *length_ptr = formatted_type_identifier_length;
834 while (*ctor_name == 'C' || *ctor_name == 'V')
836 /* Skip digits for length of type_encoding. */
837 while (*ctor_name == *length_ptr && *length_ptr)
838 length_ptr++, ctor_name++;
839 if (!strncmp (IDENTIFIER_POINTER (type_encoding), ctor_name,
840 type_identifier_length))
841 debug_name = ctor_name + type_identifier_length;
843 /* The other alternative is a destructor. */
847 /* Output the operation name just once, for the first method
851 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
852 CHARS (IDENTIFIER_LENGTH (name) + 2);
857 dbxout_type (TREE_TYPE (fndecl), 0, destructor);
859 dbxout_type_method_1 (fndecl, debug_name);
869 /* Emit a "range" type specification, which has the form:
870 "r<index type>;<lower bound>;<upper bound>;".
871 TYPE is an INTEGER_TYPE. */
874 dbxout_range_type (type)
877 fprintf (asmfile, "r");
878 if (TREE_TYPE (type))
879 dbxout_type (TREE_TYPE (type), 0, 0);
882 /* This used to say `r1' and we used to take care
883 to make sure that `int' was type number 1. */
884 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (integer_type_node));
886 if (TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
887 fprintf (asmfile, ";%d",
888 TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)));
890 fprintf (asmfile, ";0");
891 if (TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST)
892 fprintf (asmfile, ";%d;",
893 TREE_INT_CST_LOW (TYPE_MAX_VALUE (type)));
895 fprintf (asmfile, ";-1;");
898 /* Output a reference to a type. If the type has not yet been
899 described in the dbx output, output its definition now.
900 For a type already defined, just refer to its definition
901 using the type number.
903 If FULL is nonzero, and the type has been described only with
904 a forward-reference, output the definition now.
905 If FULL is zero in this case, just refer to the forward-reference
906 using the number previously allocated.
908 If SHOW_ARG_TYPES is nonzero, we output a description of the argument
909 types for a METHOD_TYPE. */
912 dbxout_type (type, full, show_arg_types)
918 static int anonymous_type_number = 0;
920 /* If there was an input error and we don't really have a type,
921 avoid crashing and write something that is at least valid
922 by assuming `int'. */
923 if (type == error_mark_node)
924 type = integer_type_node;
927 type = TYPE_MAIN_VARIANT (type);
929 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
930 && DECL_IGNORED_P (TYPE_NAME (type)))
934 if (TYPE_SYMTAB_ADDRESS (type) == 0)
936 /* Type has no dbx number assigned. Assign next available number. */
937 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
939 /* Make sure type vector is long enough to record about this type. */
941 if (next_type_number == typevec_len)
943 typevec = (enum typestatus *) xrealloc (typevec, typevec_len * 2 * sizeof typevec[0]);
944 bzero (typevec + typevec_len, typevec_len * sizeof typevec[0]);
949 /* Output the number of this type, to refer to it. */
950 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
953 #ifdef DBX_TYPE_DEFINED
954 if (DBX_TYPE_DEFINED (type))
958 /* If this type's definition has been output or is now being output,
961 switch (typevec[TYPE_SYMTAB_ADDRESS (type)])
966 /* If we have already had a cross reference,
967 and either that's all we want or that's the best we could do,
968 don't repeat the cross reference.
969 Sun dbx crashes if we do. */
970 if (! full || TYPE_SIZE (type) == 0
971 /* No way in DBX fmt to describe a variable size. */
972 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
980 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
981 leave the type-number completely undefined rather than output
982 a cross-reference. */
983 if (TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
984 || TREE_CODE (type) == QUAL_UNION_TYPE
985 || TREE_CODE (type) == ENUMERAL_TYPE)
986 /* We must use the same test here as we use twice below when deciding
987 whether to emit a cross-reference. */
988 if ((TYPE_NAME (type) != 0
989 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
990 && DECL_IGNORED_P (TYPE_NAME (type)))
992 || TYPE_SIZE (type) == 0
993 /* No way in DBX fmt to describe a variable size. */
994 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
996 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1001 /* Output a definition now. */
1003 fprintf (asmfile, "=");
1006 /* Mark it as defined, so that if it is self-referent
1007 we will not get into an infinite recursion of definitions. */
1009 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED;
1011 switch (TREE_CODE (type))
1015 /* For a void type, just define it as itself; ie, "5=5".
1016 This makes us consider it defined
1017 without saying what it is. The debugger will make it
1018 a void type when the reference is seen, and nothing will
1019 ever override that default. */
1020 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
1025 if (type == char_type_node && ! TREE_UNSIGNED (type))
1026 /* Output the type `char' as a subrange of itself!
1027 I don't understand this definition, just copied it
1028 from the output of pcc.
1029 This used to use `r2' explicitly and we used to
1030 take care to make sure that `char' was type number 2. */
1031 fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type));
1032 else if (use_gnu_debug_info_extensions
1033 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1034 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1036 /* This used to say `r1' and we used to take care
1037 to make sure that `int' was type number 1. */
1038 fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node));
1039 print_int_cst_octal (TYPE_MIN_VALUE (type));
1040 fprintf (asmfile, ";");
1041 print_int_cst_octal (TYPE_MAX_VALUE (type));
1042 fprintf (asmfile, ";");
1044 else /* Output other integer types as subranges of `int'. */
1045 dbxout_range_type (type);
1050 /* This used to say `r1' and we used to take care
1051 to make sure that `int' was type number 1. */
1052 fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node),
1053 int_size_in_bytes (type));
1058 if (use_gnu_debug_info_extensions)
1059 fprintf (asmfile, "@s%d;-20;",
1060 BITS_PER_UNIT * int_size_in_bytes (type));
1062 /* Output the type `char' as a subrange of itself.
1063 That is what pcc seems to do. */
1064 fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node),
1065 TREE_UNSIGNED (type) ? 255 : 127);
1070 if (use_gnu_debug_info_extensions)
1071 fprintf (asmfile, "@s%d;-16;",
1072 BITS_PER_UNIT * int_size_in_bytes (type));
1073 else /* Define as enumeral type (False, True) */
1074 fprintf (asmfile, "eFalse:0,True:1,;");
1079 putc ('d', asmfile);
1081 dbxout_type (TREE_TYPE (type), 0, 0);
1085 /* Differs from the REAL_TYPE by its new data type number */
1087 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1089 fprintf (asmfile, "r%d;%d;0;",
1090 TYPE_SYMTAB_ADDRESS (type),
1091 int_size_in_bytes (TREE_TYPE (type)));
1092 CHARS (15); /* The number is probably incorrect here. */
1096 /* Output a complex integer type as a structure,
1097 pending some other way to do it. */
1098 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1100 fprintf (asmfile, "real:");
1102 dbxout_type (TREE_TYPE (type), 0, 0);
1103 fprintf (asmfile, ",%d,%d;",
1104 0, TYPE_PRECISION (TREE_TYPE (type)));
1106 fprintf (asmfile, "imag:");
1108 dbxout_type (TREE_TYPE (type), 0, 0);
1109 fprintf (asmfile, ",%d,%d;;",
1110 TYPE_PRECISION (TREE_TYPE (type)),
1111 TYPE_PRECISION (TREE_TYPE (type)));
1117 if (use_gnu_debug_info_extensions)
1119 have_used_extensions = 1;
1120 fprintf (asmfile, "@s%d;",
1121 BITS_PER_UNIT * int_size_in_bytes (type));
1122 /* Check if a bitstring type, which in Chill is
1123 different from a [power]set. */
1124 if (TYPE_STRING_FLAG (type))
1125 fprintf (asmfile, "@S;");
1127 putc ('S', asmfile);
1129 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1133 /* Output "a" followed by a range type definition
1134 for the index type of the array
1135 followed by a reference to the target-type.
1136 ar1;0;N;M for a C array of type M and size N+1. */
1137 /* Check if a character string type, which in Chill is
1138 different from an array of characters. */
1139 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1141 have_used_extensions = 1;
1142 fprintf (asmfile, "@S;");
1144 tem = TYPE_DOMAIN (type);
1146 fprintf (asmfile, "ar%d;0;-1;",
1147 TYPE_SYMTAB_ADDRESS (integer_type_node));
1150 fprintf (asmfile, "a");
1151 dbxout_range_type (tem);
1154 dbxout_type (TREE_TYPE (type), 0, 0);
1159 case QUAL_UNION_TYPE:
1161 int i, n_baseclasses = 0;
1163 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1164 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1166 /* Output a structure type. We must use the same test here as we
1167 use in the DBX_NO_XREFS case above. */
1168 if ((TYPE_NAME (type) != 0
1169 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1170 && DECL_IGNORED_P (TYPE_NAME (type)))
1172 || TYPE_SIZE (type) == 0
1173 /* No way in DBX fmt to describe a variable size. */
1174 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1176 /* If the type is just a cross reference, output one
1177 and mark the type as partially described.
1178 If it later becomes defined, we will output
1179 its real definition.
1180 If the type has a name, don't nest its definition within
1181 another type's definition; instead, output an xref
1182 and let the definition come when the name is defined. */
1183 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1185 #if 0 /* This assertion is legitimately false in C++. */
1186 /* We shouldn't be outputting a reference to a type before its
1187 definition unless the type has a tag name.
1188 A typedef name without a tag name should be impossible. */
1189 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1192 if (TYPE_NAME (type) != 0)
1193 dbxout_type_name (type);
1195 fprintf (asmfile, "$$%d", anonymous_type_number++);
1196 fprintf (asmfile, ":");
1197 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1201 /* Identify record or union, and print its size. */
1202 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1203 int_size_in_bytes (type));
1205 if (use_gnu_debug_info_extensions)
1209 have_used_extensions = 1;
1210 fprintf (asmfile, "!%d,", n_baseclasses);
1214 for (i = 0; i < n_baseclasses; i++)
1216 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1217 if (use_gnu_debug_info_extensions)
1219 have_used_extensions = 1;
1220 putc (TREE_VIA_VIRTUAL (child) ? '1'
1223 putc (TREE_VIA_PUBLIC (child) ? '2'
1226 fprintf (asmfile, "%d,",
1227 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1229 dbxout_type (BINFO_TYPE (child), 0, 0);
1230 putc (';', asmfile);
1234 /* Print out the base class information with fields
1235 which have the same names at the types they hold. */
1236 dbxout_type_name (BINFO_TYPE (child));
1237 putc (':', asmfile);
1238 dbxout_type (BINFO_TYPE (child), full, 0);
1239 fprintf (asmfile, ",%d,%d;",
1240 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1241 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1249 /* Write out the field declarations. */
1250 dbxout_type_fields (type);
1251 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1253 have_used_extensions = 1;
1254 dbxout_type_methods (type);
1256 putc (';', asmfile);
1258 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1259 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1260 && TYPE_VFIELD (type))
1262 have_used_extensions = 1;
1264 /* Tell GDB+ that it may keep reading. */
1265 putc ('~', asmfile);
1267 /* We need to write out info about what field this class
1268 uses as its "main" vtable pointer field, because if this
1269 field is inherited from a base class, GDB cannot necessarily
1270 figure out which field it's using in time. */
1271 if (TYPE_VFIELD (type))
1273 putc ('%', asmfile);
1274 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1276 putc (';', asmfile);
1282 /* We must use the same test here as we use in the DBX_NO_XREFS case
1283 above. We simplify it a bit since an enum will never have a variable
1285 if ((TYPE_NAME (type) != 0
1286 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1287 && DECL_IGNORED_P (TYPE_NAME (type)))
1289 || TYPE_SIZE (type) == 0)
1291 fprintf (asmfile, "xe");
1293 dbxout_type_name (type);
1294 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1295 fprintf (asmfile, ":");
1298 #ifdef DBX_OUTPUT_ENUM
1299 DBX_OUTPUT_ENUM (asmfile, type);
1301 putc ('e', asmfile);
1303 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1305 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1306 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1307 fprintf (asmfile, "%lu",
1308 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1309 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1310 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1311 fprintf (asmfile, "%ld",
1312 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1314 print_int_cst_octal (TREE_VALUE (tem));
1315 fprintf (asmfile, ",");
1316 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1317 if (TREE_CHAIN (tem) != 0)
1320 putc (';', asmfile);
1326 putc ('*', asmfile);
1328 dbxout_type (TREE_TYPE (type), 0, 0);
1332 if (use_gnu_debug_info_extensions)
1334 have_used_extensions = 1;
1335 putc ('#', asmfile);
1337 if (flag_minimal_debug && !show_arg_types)
1339 /* Normally, just output the return type.
1340 The argument types are encoded in the method name. */
1341 putc ('#', asmfile);
1342 dbxout_type (TREE_TYPE (type), 0, 0);
1343 putc (';', asmfile);
1348 /* When outputting destructors, we need to write
1349 the argument types out longhand. */
1350 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1351 putc (',', asmfile);
1353 dbxout_type (TREE_TYPE (type), 0, 0);
1354 dbxout_args (TYPE_ARG_TYPES (type));
1355 putc (';', asmfile);
1361 /* Treat it as a function type. */
1362 dbxout_type (TREE_TYPE (type), 0, 0);
1367 if (use_gnu_debug_info_extensions)
1369 have_used_extensions = 1;
1370 putc ('@', asmfile);
1372 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1373 putc (',', asmfile);
1375 dbxout_type (TREE_TYPE (type), 0, 0);
1379 /* Should print as an int, because it is really
1381 dbxout_type (integer_type_node, 0, 0);
1385 case REFERENCE_TYPE:
1386 if (use_gnu_debug_info_extensions)
1387 have_used_extensions = 1;
1388 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1390 dbxout_type (TREE_TYPE (type), 0, 0);
1394 putc ('f', asmfile);
1396 dbxout_type (TREE_TYPE (type), 0, 0);
1404 /* Print the value of integer constant C, in octal,
1405 handling double precision. */
1408 print_int_cst_octal (c)
1411 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1412 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1413 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1414 int width = TYPE_PRECISION (TREE_TYPE (c));
1416 /* GDB wants constants with no extra leading "1" bits, so
1417 we need to remove any sign-extension that might be
1419 if (width == HOST_BITS_PER_WIDE_INT * 2)
1421 else if (width > HOST_BITS_PER_WIDE_INT)
1422 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1423 else if (width == HOST_BITS_PER_WIDE_INT)
1426 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1428 fprintf (asmfile, "0");
1432 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1433 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1437 unsigned HOST_WIDE_INT beg = high >> excess;
1438 unsigned HOST_WIDE_INT middle
1439 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1440 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1441 unsigned HOST_WIDE_INT end
1442 = low & (((unsigned HOST_WIDE_INT) 1
1443 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1446 fprintf (asmfile, "%o%01o", beg, middle);
1447 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1452 print_octal (value, digits)
1453 unsigned HOST_WIDE_INT value;
1458 for (i = digits - 1; i >= 0; i--)
1459 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1462 /* Output the name of type TYPE, with no punctuation.
1463 Such names can be set up either by typedef declarations
1464 or by struct, enum and union tags. */
1467 dbxout_type_name (type)
1471 if (TYPE_NAME (type) == 0)
1473 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1475 t = TYPE_NAME (type);
1477 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1479 t = DECL_NAME (TYPE_NAME (type));
1484 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1485 CHARS (IDENTIFIER_LENGTH (t));
1488 /* Output a .stabs for the symbol defined by DECL,
1489 which must be a ..._DECL node in the normal namespace.
1490 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1491 LOCAL is nonzero if the scope is less than the entire file. */
1494 dbxout_symbol (decl, local)
1498 tree type = TREE_TYPE (decl);
1499 tree context = NULL_TREE;
1501 /* Cast avoids warning in old compilers. */
1502 current_sym_code = (STAB_CODE_TYPE) 0;
1503 current_sym_value = 0;
1504 current_sym_addr = 0;
1506 /* Ignore nameless syms, but don't ignore type tags. */
1508 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1509 || DECL_IGNORED_P (decl))
1512 dbxout_prepare_symbol (decl);
1514 /* The output will always start with the symbol name,
1515 so always count that in the length-output-so-far. */
1517 if (DECL_NAME (decl) != 0)
1518 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1520 switch (TREE_CODE (decl))
1523 /* Enum values are defined by defining the enum type. */
1527 if (DECL_RTL (decl) == 0)
1529 if (DECL_EXTERNAL (decl))
1531 /* Don't mention a nested function under its parent. */
1532 context = decl_function_context (decl);
1533 if (context == current_function_decl)
1535 if (GET_CODE (DECL_RTL (decl)) != MEM
1536 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1540 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1541 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1542 TREE_PUBLIC (decl) ? 'F' : 'f');
1544 current_sym_code = N_FUN;
1545 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1547 if (TREE_TYPE (type))
1548 dbxout_type (TREE_TYPE (type), 0, 0);
1550 dbxout_type (void_type_node, 0, 0);
1552 /* For a nested function, when that function is compiled,
1553 mention the containing function name
1554 as well as (since dbx wants it) our own assembler-name. */
1556 fprintf (asmfile, ",%s,%s",
1557 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1558 IDENTIFIER_POINTER (DECL_NAME (context)));
1560 dbxout_finish_symbol (decl);
1565 /* This seems all wrong. Outputting most kinds of types gives no name
1566 at all. A true definition gives no name; a cross-ref for a
1567 structure can give the tag name, but not a type name.
1568 It seems that no typedef name is defined by outputting a type. */
1570 /* If this typedef name was defined by outputting the type,
1571 don't duplicate it. */
1572 if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED
1573 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1576 /* Don't output the same typedef twice.
1577 And don't output what language-specific stuff doesn't want output. */
1578 if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl))
1587 if (DECL_NAME (decl))
1589 /* Nonzero means we must output a tag as well as a typedef. */
1592 /* Handle the case of a C++ structure or union
1593 where the TYPE_NAME is a TYPE_DECL
1594 which gives both a typedef name and a tag. */
1595 /* dbx requires the tag first and the typedef second. */
1596 if ((TREE_CODE (type) == RECORD_TYPE
1597 || TREE_CODE (type) == UNION_TYPE
1598 || TREE_CODE (type) == QUAL_UNION_TYPE)
1599 && TYPE_NAME (type) == decl
1600 && !(use_gnu_debug_info_extensions && have_used_extensions)
1601 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1602 /* Distinguish the implicit typedefs of C++
1603 from explicit ones that might be found in C. */
1604 && (!strcmp (lang_identify (), "cplusplus")
1605 /* The following line maybe unnecessary;
1606 in 2.6, try removing it. */
1607 || DECL_SOURCE_LINE (decl) == 0))
1609 tree name = TYPE_NAME (type);
1610 if (TREE_CODE (name) == TYPE_DECL)
1611 name = DECL_NAME (name);
1613 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1614 current_sym_value = 0;
1615 current_sym_addr = 0;
1616 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1618 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1619 IDENTIFIER_POINTER (name));
1620 dbxout_type (type, 1, 0);
1621 dbxout_finish_symbol (NULL_TREE);
1624 /* Output typedef name. */
1625 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1626 IDENTIFIER_POINTER (DECL_NAME (decl)));
1628 /* Short cut way to output a tag also. */
1629 if ((TREE_CODE (type) == RECORD_TYPE
1630 || TREE_CODE (type) == UNION_TYPE
1631 || TREE_CODE (type) == QUAL_UNION_TYPE)
1632 && TYPE_NAME (type) == decl)
1634 if (use_gnu_debug_info_extensions && have_used_extensions)
1636 putc ('T', asmfile);
1637 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1639 #if 0 /* Now we generate the tag for this case up above. */
1645 putc ('t', asmfile);
1646 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1648 dbxout_type (type, 1, 0);
1649 dbxout_finish_symbol (decl);
1653 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1654 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1656 if (tag_needed && TYPE_NAME (type) != 0 && TYPE_SIZE (type) != 0
1657 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1659 /* For a TYPE_DECL with no name, but the type has a name,
1661 This is what represents `struct foo' with no typedef. */
1662 /* In C++, the name of a type is the corresponding typedef.
1663 In C, it is an IDENTIFIER_NODE. */
1664 tree name = TYPE_NAME (type);
1665 if (TREE_CODE (name) == TYPE_DECL)
1666 name = DECL_NAME (name);
1668 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1669 current_sym_value = 0;
1670 current_sym_addr = 0;
1671 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1673 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1674 IDENTIFIER_POINTER (name));
1675 dbxout_type (type, 1, 0);
1676 dbxout_finish_symbol (NULL_TREE);
1680 /* If an enum type has no name, it cannot be referred to,
1681 but we must output it anyway, since the enumeration constants
1682 can be referred to. */
1683 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1685 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1686 current_sym_value = 0;
1687 current_sym_addr = 0;
1688 current_sym_nchars = 2;
1690 /* Some debuggers fail when given NULL names, so give this a
1691 harmless name of ` '. */
1692 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1693 dbxout_type (type, 1, 0);
1694 dbxout_finish_symbol (NULL_TREE);
1697 /* Prevent duplicate output of a typedef. */
1698 TREE_ASM_WRITTEN (decl) = 1;
1703 /* Parm decls go in their own separate chains
1704 and are output by dbxout_reg_parms and dbxout_parms. */
1708 /* Named return value, treat like a VAR_DECL. */
1710 if (DECL_RTL (decl) == 0)
1712 /* Don't mention a variable that is external.
1713 Let the file that defines it describe it. */
1714 if (DECL_EXTERNAL (decl))
1717 /* If the variable is really a constant
1718 and not written in memory, inform the debugger. */
1719 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1720 && DECL_INITIAL (decl) != 0
1721 && ! TREE_ASM_WRITTEN (decl)
1722 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1723 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1725 if (TREE_PUBLIC (decl) == 0)
1727 /* The sun4 assembler does not grok this. */
1728 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1729 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1730 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1732 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1733 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1734 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1736 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1737 ASM_STABS_OP, name, ival, N_LSYM);
1741 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1743 /* don't know how to do this yet. */
1747 /* else it is something we handle like a normal variable. */
1750 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1751 #ifdef LEAF_REG_REMAP
1753 leaf_renumber_regs_insn (DECL_RTL (decl));
1756 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1760 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1761 Add SUFFIX to its name, if SUFFIX is not 0.
1762 Describe the variable as residing in HOME
1763 (usually HOME is DECL_RTL (DECL), but not always). */
1766 dbxout_symbol_location (decl, type, suffix, home)
1774 /* Don't mention a variable at all
1775 if it was completely optimized into nothingness.
1777 If the decl was from an inline function, then it's rtl
1778 is not identically the rtl that was used in this
1779 particular compilation. */
1780 if (GET_CODE (home) == REG)
1782 regno = REGNO (home);
1783 if (regno >= FIRST_PSEUDO_REGISTER)
1786 else if (GET_CODE (home) == SUBREG)
1790 while (GET_CODE (value) == SUBREG)
1792 offset += SUBREG_WORD (value);
1793 value = SUBREG_REG (value);
1795 if (GET_CODE (value) == REG)
1797 regno = REGNO (value);
1798 if (regno >= FIRST_PSEUDO_REGISTER)
1802 alter_subreg (home);
1805 /* The kind-of-variable letter depends on where
1806 the variable is and on the scope of its name:
1807 G and N_GSYM for static storage and global scope,
1808 S for static storage and file scope,
1809 V for static storage and local scope,
1810 for those two, use N_LCSYM if data is in bss segment,
1811 N_STSYM if in data segment, N_FUN otherwise.
1812 (We used N_FUN originally, then changed to N_STSYM
1813 to please GDB. However, it seems that confused ld.
1814 Now GDB has been fixed to like N_FUN, says Kingdon.)
1815 no letter at all, and N_LSYM, for auto variable,
1816 r and N_RSYM for register variable. */
1818 if (GET_CODE (home) == MEM
1819 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1821 if (TREE_PUBLIC (decl))
1824 current_sym_code = N_GSYM;
1828 current_sym_addr = XEXP (home, 0);
1830 letter = decl_function_context (decl) ? 'V' : 'S';
1832 if (!DECL_INITIAL (decl))
1833 current_sym_code = N_LCSYM;
1834 else if (DECL_IN_TEXT_SECTION (decl))
1835 /* This is not quite right, but it's the closest
1836 of all the codes that Unix defines. */
1837 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
1840 /* Ultrix `as' seems to need this. */
1841 #ifdef DBX_STATIC_STAB_DATA_SECTION
1844 current_sym_code = N_STSYM;
1848 else if (regno >= 0)
1851 current_sym_code = N_RSYM;
1852 current_sym_value = DBX_REGISTER_NUMBER (regno);
1854 else if (GET_CODE (home) == MEM
1855 && (GET_CODE (XEXP (home, 0)) == MEM
1856 || (GET_CODE (XEXP (home, 0)) == REG
1857 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
1858 /* If the value is indirect by memory or by a register
1859 that isn't the frame pointer
1860 then it means the object is variable-sized and address through
1861 that register or stack slot. DBX has no way to represent this
1862 so all we can do is output the variable as a pointer.
1863 If it's not a parameter, ignore it.
1864 (VAR_DECLs like this can be made by integrate.c.) */
1866 if (GET_CODE (XEXP (home, 0)) == REG)
1869 current_sym_code = N_RSYM;
1870 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
1874 current_sym_code = N_LSYM;
1875 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
1876 We want the value of that CONST_INT. */
1878 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
1881 /* Effectively do build_pointer_type, but don't cache this type,
1882 since it might be temporary whereas the type it points to
1883 might have been saved for inlining. */
1884 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
1885 type = make_node (POINTER_TYPE);
1886 TREE_TYPE (type) = TREE_TYPE (decl);
1888 else if (GET_CODE (home) == MEM
1889 && GET_CODE (XEXP (home, 0)) == REG)
1891 current_sym_code = N_LSYM;
1892 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1894 else if (GET_CODE (home) == MEM
1895 && GET_CODE (XEXP (home, 0)) == PLUS
1896 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
1898 current_sym_code = N_LSYM;
1899 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
1900 We want the value of that CONST_INT. */
1901 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1903 else if (GET_CODE (home) == MEM
1904 && GET_CODE (XEXP (home, 0)) == CONST)
1906 /* Handle an obscure case which can arise when optimizing and
1907 when there are few available registers. (This is *always*
1908 the case for i386/i486 targets). The RTL looks like
1909 (MEM (CONST ...)) even though this variable is a local `auto'
1910 or a local `register' variable. In effect, what has happened
1911 is that the reload pass has seen that all assignments and
1912 references for one such a local variable can be replaced by
1913 equivalent assignments and references to some static storage
1914 variable, thereby avoiding the need for a register. In such
1915 cases we're forced to lie to debuggers and tell them that
1916 this variable was itself `static'. */
1917 current_sym_code = N_LCSYM;
1919 current_sym_addr = XEXP (XEXP (home, 0), 0);
1921 else if (GET_CODE (home) == CONCAT)
1923 tree subtype = TREE_TYPE (type);
1925 /* If the variable's storage is in two parts,
1926 output each as a separate stab with a modified name. */
1927 if (WORDS_BIG_ENDIAN)
1928 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
1930 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
1932 /* Cast avoids warning in old compilers. */
1933 current_sym_code = (STAB_CODE_TYPE) 0;
1934 current_sym_value = 0;
1935 current_sym_addr = 0;
1936 dbxout_prepare_symbol (decl);
1938 if (WORDS_BIG_ENDIAN)
1939 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
1941 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
1945 /* Address might be a MEM, when DECL is a variable-sized object.
1946 Or it might be const0_rtx, meaning previous passes
1947 want us to ignore this variable. */
1950 /* Ok, start a symtab entry and output the variable name. */
1953 #ifdef DBX_STATIC_BLOCK_START
1954 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
1957 dbxout_symbol_name (decl, suffix, letter);
1958 dbxout_type (type, 0, 0);
1959 dbxout_finish_symbol (decl);
1961 #ifdef DBX_STATIC_BLOCK_END
1962 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
1966 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
1967 Then output LETTER to indicate the kind of location the symbol has. */
1970 dbxout_symbol_name (decl, suffix, letter)
1975 /* One slight hitch: if this is a VAR_DECL which is a static
1976 class member, we must put out the mangled name instead of the
1980 /* Note also that static member (variable) names DO NOT begin
1981 with underscores in .stabs directives. */
1982 if (DECL_LANG_SPECIFIC (decl))
1983 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
1985 name = IDENTIFIER_POINTER (DECL_NAME (decl));
1988 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
1989 (suffix ? suffix : ""));
1991 if (letter) putc (letter, asmfile);
1995 dbxout_prepare_symbol (decl)
1999 char *filename = DECL_SOURCE_FILE (decl);
2001 dbxout_source_file (asmfile, filename);
2006 dbxout_finish_symbol (sym)
2009 #ifdef DBX_FINISH_SYMBOL
2010 DBX_FINISH_SYMBOL (sym);
2013 if (use_gnu_debug_info_extensions && sym != 0)
2014 line = DECL_SOURCE_LINE (sym);
2016 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2017 if (current_sym_addr)
2018 output_addr_const (asmfile, current_sym_addr);
2020 fprintf (asmfile, "%d", current_sym_value);
2021 putc ('\n', asmfile);
2025 /* Output definitions of all the decls in a chain. */
2033 dbxout_symbol (syms, 1);
2034 syms = TREE_CHAIN (syms);
2038 /* The following two functions output definitions of function parameters.
2039 Each parameter gets a definition locating it in the parameter list.
2040 Each parameter that is a register variable gets a second definition
2041 locating it in the register.
2043 Printing or argument lists in gdb uses the definitions that
2044 locate in the parameter list. But reference to the variable in
2045 expressions uses preferentially the definition as a register. */
2047 /* Output definitions, referring to storage in the parmlist,
2048 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2051 dbxout_parms (parms)
2054 for (; parms; parms = TREE_CHAIN (parms))
2055 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2057 dbxout_prepare_symbol (parms);
2059 /* Perform any necessary register eliminations on the parameter's rtl,
2060 so that the debugging output will be accurate. */
2061 DECL_INCOMING_RTL (parms)
2062 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2063 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2064 #ifdef LEAF_REG_REMAP
2067 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2068 leaf_renumber_regs_insn (DECL_RTL (parms));
2072 if (PARM_PASSED_IN_MEMORY (parms))
2074 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2076 /* ??? Here we assume that the parm address is indexed
2077 off the frame pointer or arg pointer.
2078 If that is not true, we produce meaningless results,
2079 but do not crash. */
2080 if (GET_CODE (addr) == PLUS
2081 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2082 current_sym_value = INTVAL (XEXP (addr, 1));
2084 current_sym_value = 0;
2086 current_sym_code = N_PSYM;
2087 current_sym_addr = 0;
2090 if (DECL_NAME (parms))
2092 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2094 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2095 IDENTIFIER_POINTER (DECL_NAME (parms)),
2096 DBX_MEMPARM_STABS_LETTER);
2100 current_sym_nchars = 8;
2101 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2102 DBX_MEMPARM_STABS_LETTER);
2105 if (GET_CODE (DECL_RTL (parms)) == REG
2106 && REGNO (DECL_RTL (parms)) >= 0
2107 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2108 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2111 int original_value = current_sym_value;
2113 /* This is the case where the parm is passed as an int or double
2114 and it is converted to a char, short or float and stored back
2115 in the parmlist. In this case, describe the parm
2116 with the variable's declared type, and adjust the address
2117 if the least significant bytes (which we are using) are not
2119 #if BYTES_BIG_ENDIAN
2120 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2121 current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2122 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2125 if (GET_CODE (DECL_RTL (parms)) == MEM
2126 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2127 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2128 && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value)
2129 dbxout_type (TREE_TYPE (parms), 0, 0);
2132 current_sym_value = original_value;
2133 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2136 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2137 dbxout_finish_symbol (parms);
2139 else if (GET_CODE (DECL_RTL (parms)) == REG)
2142 char regparm_letter;
2144 /* Parm passed in registers and lives in registers or nowhere. */
2146 current_sym_code = DBX_REGPARM_STABS_CODE;
2147 regparm_letter = DBX_REGPARM_STABS_LETTER;
2148 current_sym_addr = 0;
2150 /* If parm lives in a register, use that register;
2151 pretend the parm was passed there. It would be more consistent
2152 to describe the register where the parm was passed,
2153 but in practice that register usually holds something else.
2155 If we use DECL_RTL, then we must use the declared type of
2156 the variable, not the type that it arrived in. */
2157 if (REGNO (DECL_RTL (parms)) >= 0
2158 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2160 best_rtl = DECL_RTL (parms);
2161 parm_type = TREE_TYPE (parms);
2163 /* If the parm lives nowhere, use the register where it was
2164 passed. It is also better to use the declared type here. */
2167 best_rtl = DECL_INCOMING_RTL (parms);
2168 parm_type = TREE_TYPE (parms);
2170 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2173 if (DECL_NAME (parms))
2175 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2176 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2177 IDENTIFIER_POINTER (DECL_NAME (parms)),
2182 current_sym_nchars = 8;
2183 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2187 dbxout_type (parm_type, 0, 0);
2188 dbxout_finish_symbol (parms);
2190 else if (GET_CODE (DECL_RTL (parms)) == MEM
2191 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2192 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2193 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2194 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2195 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2199 /* Parm was passed via invisible reference.
2200 That is, its address was passed in a register.
2201 Output it as if it lived in that register.
2202 The debugger will know from the type
2203 that it was actually passed by invisible reference. */
2205 char regparm_letter;
2206 /* Parm passed in registers and lives in registers or nowhere. */
2208 current_sym_code = DBX_REGPARM_STABS_CODE;
2209 regparm_letter = DBX_REGPARM_STABS_LETTER;
2211 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2212 If it is an unallocated pseudo-reg, then use the register where
2213 it was passed instead. */
2214 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2215 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2216 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2218 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2220 current_sym_addr = 0;
2223 if (DECL_NAME (parms))
2225 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2227 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2228 IDENTIFIER_POINTER (DECL_NAME (parms)),
2229 DBX_REGPARM_STABS_LETTER);
2233 current_sym_nchars = 8;
2234 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2235 DBX_REGPARM_STABS_LETTER);
2238 dbxout_type (TREE_TYPE (parms), 0, 0);
2239 dbxout_finish_symbol (parms);
2241 else if (GET_CODE (DECL_RTL (parms)) == MEM
2242 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2243 /* ??? A constant address for a parm can happen
2244 when the reg it lives in is equiv to a constant in memory.
2245 Should make this not happen, after 2.4. */
2246 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2248 /* Parm was passed in registers but lives on the stack. */
2250 current_sym_code = N_PSYM;
2251 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2252 in which case we want the value of that CONST_INT,
2253 or (MEM (REG ...)) or (MEM (MEM ...)),
2254 in which case we use a value of zero. */
2255 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2256 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2257 current_sym_value = 0;
2259 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2260 current_sym_addr = 0;
2263 if (DECL_NAME (parms))
2265 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2267 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2268 IDENTIFIER_POINTER (DECL_NAME (parms)),
2269 DBX_MEMPARM_STABS_LETTER);
2273 current_sym_nchars = 8;
2274 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2275 DBX_MEMPARM_STABS_LETTER);
2279 = DEBUGGER_ARG_OFFSET (current_sym_value,
2280 XEXP (DECL_RTL (parms), 0));
2281 dbxout_type (TREE_TYPE (parms), 0, 0);
2282 dbxout_finish_symbol (parms);
2287 /* Output definitions for the places where parms live during the function,
2288 when different from where they were passed, when the parms were passed
2291 It is not useful to do this for parms passed in registers
2292 that live during the function in different registers, because it is
2293 impossible to look in the passed register for the passed value,
2294 so we use the within-the-function register to begin with.
2296 PARMS is a chain of PARM_DECL nodes. */
2299 dbxout_reg_parms (parms)
2302 for (; parms; parms = TREE_CHAIN (parms))
2303 if (DECL_NAME (parms))
2305 dbxout_prepare_symbol (parms);
2307 /* Report parms that live in registers during the function
2308 but were passed in memory. */
2309 if (GET_CODE (DECL_RTL (parms)) == REG
2310 && REGNO (DECL_RTL (parms)) >= 0
2311 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
2312 && PARM_PASSED_IN_MEMORY (parms))
2313 dbxout_symbol_location (parms, TREE_TYPE (parms),
2314 0, DECL_RTL (parms));
2315 else if (GET_CODE (DECL_RTL (parms)) == CONCAT
2316 && PARM_PASSED_IN_MEMORY (parms))
2317 dbxout_symbol_location (parms, TREE_TYPE (parms),
2318 0, DECL_RTL (parms));
2319 /* Report parms that live in memory but not where they were passed. */
2320 else if (GET_CODE (DECL_RTL (parms)) == MEM
2321 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2322 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2323 && PARM_PASSED_IN_MEMORY (parms)
2324 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2326 #if 0 /* ??? It is not clear yet what should replace this. */
2327 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
2328 /* A parm declared char is really passed as an int,
2329 so it occupies the least significant bytes.
2330 On a big-endian machine those are not the low-numbered ones. */
2331 #if BYTES_BIG_ENDIAN
2332 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2333 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2334 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2336 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
2338 dbxout_symbol_location (parms, TREE_TYPE (parms),
2339 0, DECL_RTL (parms));
2342 else if (GET_CODE (DECL_RTL (parms)) == MEM
2343 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2345 /* Parm was passed via invisible reference.
2346 That is, its address was passed in a register.
2347 Output it as if it lived in that register.
2348 The debugger will know from the type
2349 that it was actually passed by invisible reference. */
2351 current_sym_code = N_RSYM;
2353 /* DECL_RTL looks like (MEM (REG...). Get the register number. */
2354 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2355 current_sym_addr = 0;
2358 if (DECL_NAME (parms))
2360 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2362 fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP,
2363 IDENTIFIER_POINTER (DECL_NAME (parms)));
2367 current_sym_nchars = 8;
2368 fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP);
2371 dbxout_type (TREE_TYPE (parms), 0, 0);
2372 dbxout_finish_symbol (parms);
2378 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2379 output definitions of those names, in raw form */
2387 putc (',', asmfile);
2388 dbxout_type (TREE_VALUE (args), 0, 0);
2390 args = TREE_CHAIN (args);
2394 /* Given a chain of ..._TYPE nodes,
2395 find those which have typedef names and output those names.
2396 This is to ensure those types get output. */
2399 dbxout_types (types)
2400 register tree types;
2404 if (TYPE_NAME (types)
2405 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2406 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2407 dbxout_symbol (TYPE_NAME (types), 1);
2408 types = TREE_CHAIN (types);
2412 /* Output everything about a symbol block (a BLOCK node
2413 that represents a scope level),
2414 including recursive output of contained blocks.
2416 BLOCK is the BLOCK node.
2417 DEPTH is its depth within containing symbol blocks.
2418 ARGS is usually zero; but for the outermost block of the
2419 body of a function, it is a chain of PARM_DECLs for the function parameters.
2420 We output definitions of all the register parms
2421 as if they were local variables of that block.
2423 If -g1 was used, we count blocks just the same, but output nothing
2424 except for the outermost block.
2426 Actually, BLOCK may be several blocks chained together.
2427 We handle them all in sequence. */
2430 dbxout_block (block, depth, args)
2431 register tree block;
2439 /* Ignore blocks never expanded or otherwise marked as real. */
2440 if (TREE_USED (block))
2442 #ifndef DBX_LBRAC_FIRST
2443 /* In dbx format, the syms of a block come before the N_LBRAC. */
2444 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2445 dbxout_syms (BLOCK_VARS (block));
2447 dbxout_reg_parms (args);
2450 /* Now output an N_LBRAC symbol to represent the beginning of
2451 the block. Use the block's tree-walk order to generate
2452 the assembler symbols LBBn and LBEn
2453 that final will define around the code in this block. */
2454 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2457 blocknum = next_block_number++;
2458 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2460 if (BLOCK_HANDLER_BLOCK (block))
2462 /* A catch block. Must precede N_LBRAC. */
2463 tree decl = BLOCK_VARS (block);
2466 #ifdef DBX_OUTPUT_CATCH
2467 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2469 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2470 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2471 assemble_name (asmfile, buf);
2472 fprintf (asmfile, "\n");
2474 decl = TREE_CHAIN (decl);
2478 #ifdef DBX_OUTPUT_LBRAC
2479 DBX_OUTPUT_LBRAC (asmfile, buf);
2481 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2482 assemble_name (asmfile, buf);
2483 #if DBX_BLOCKS_FUNCTION_RELATIVE
2484 fputc ('-', asmfile);
2485 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2487 fprintf (asmfile, "\n");
2491 /* Count blocks the same way regardless of debug_info_level. */
2492 next_block_number++;
2494 #ifdef DBX_LBRAC_FIRST
2495 /* On some weird machines, the syms of a block
2496 come after the N_LBRAC. */
2497 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2498 dbxout_syms (BLOCK_VARS (block));
2500 dbxout_reg_parms (args);
2503 /* Output the subblocks. */
2504 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2506 /* Refer to the marker for the end of the block. */
2507 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2510 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2511 #ifdef DBX_OUTPUT_RBRAC
2512 DBX_OUTPUT_RBRAC (asmfile, buf);
2514 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2515 assemble_name (asmfile, buf);
2516 #if DBX_BLOCKS_FUNCTION_RELATIVE
2517 fputc ('-', asmfile);
2518 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2520 fprintf (asmfile, "\n");
2524 block = BLOCK_CHAIN (block);
2528 /* Output the information about a function and its arguments and result.
2529 Usually this follows the function's code,
2530 but on some systems, it comes before. */
2533 dbxout_really_begin_function (decl)
2536 dbxout_symbol (decl, 0);
2537 dbxout_parms (DECL_ARGUMENTS (decl));
2538 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2539 dbxout_symbol (DECL_RESULT (decl), 1);
2542 /* Called at beginning of output of function definition. */
2545 dbxout_begin_function (decl)
2548 #ifdef DBX_FUNCTION_FIRST
2549 dbxout_really_begin_function (decl);
2553 /* Output dbx data for a function definition.
2554 This includes a definition of the function name itself (a symbol),
2555 definitions of the parameters (locating them in the parameter list)
2556 and then output the block that makes up the function's body
2557 (including all the auto variables of the function). */
2560 dbxout_function (decl)
2563 #ifndef DBX_FUNCTION_FIRST
2564 dbxout_really_begin_function (decl);
2566 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2567 #ifdef DBX_OUTPUT_FUNCTION_END
2568 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2571 #endif /* DBX_DEBUGGING_INFO */