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 ((char *) 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);
880 else if (TREE_CODE (type) != INTEGER_TYPE)
881 dbxout_type (type, 0, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
884 /* This used to say `r1' and we used to take care
885 to make sure that `int' was type number 1. */
886 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (integer_type_node));
888 if (TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
889 fprintf (asmfile, ";%d",
890 TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)));
892 fprintf (asmfile, ";0");
893 if (TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST)
894 fprintf (asmfile, ";%d;",
895 TREE_INT_CST_LOW (TYPE_MAX_VALUE (type)));
897 fprintf (asmfile, ";-1;");
900 /* Output a reference to a type. If the type has not yet been
901 described in the dbx output, output its definition now.
902 For a type already defined, just refer to its definition
903 using the type number.
905 If FULL is nonzero, and the type has been described only with
906 a forward-reference, output the definition now.
907 If FULL is zero in this case, just refer to the forward-reference
908 using the number previously allocated.
910 If SHOW_ARG_TYPES is nonzero, we output a description of the argument
911 types for a METHOD_TYPE. */
914 dbxout_type (type, full, show_arg_types)
920 static int anonymous_type_number = 0;
922 /* If there was an input error and we don't really have a type,
923 avoid crashing and write something that is at least valid
924 by assuming `int'. */
925 if (type == error_mark_node)
926 type = integer_type_node;
929 type = TYPE_MAIN_VARIANT (type);
931 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
932 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type)))
936 if (TYPE_SYMTAB_ADDRESS (type) == 0)
938 /* Type has no dbx number assigned. Assign next available number. */
939 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
941 /* Make sure type vector is long enough to record about this type. */
943 if (next_type_number == typevec_len)
945 int len = typevec_len * 2 * sizeof typevec[0];
947 typevec = (enum typestatus *) xrealloc (typevec, len);
948 bzero ((char *) (typevec + typevec_len), len);
953 /* Output the number of this type, to refer to it. */
954 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
957 #ifdef DBX_TYPE_DEFINED
958 if (DBX_TYPE_DEFINED (type))
962 /* If this type's definition has been output or is now being output,
965 switch (typevec[TYPE_SYMTAB_ADDRESS (type)])
970 /* If we have already had a cross reference,
971 and either that's all we want or that's the best we could do,
972 don't repeat the cross reference.
973 Sun dbx crashes if we do. */
974 if (! full || TYPE_SIZE (type) == 0
975 /* No way in DBX fmt to describe a variable size. */
976 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
984 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
985 leave the type-number completely undefined rather than output
986 a cross-reference. If we have already used GNU debug info extensions,
987 then it is OK to output a cross reference. This is necessary to get
988 proper C++ debug output. */
989 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
990 || TREE_CODE (type) == QUAL_UNION_TYPE
991 || TREE_CODE (type) == ENUMERAL_TYPE)
992 && ! use_gnu_debug_info_extensions)
993 /* We must use the same test here as we use twice below when deciding
994 whether to emit a cross-reference. */
995 if ((TYPE_NAME (type) != 0
996 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
997 && DECL_IGNORED_P (TYPE_NAME (type)))
999 || TYPE_SIZE (type) == 0
1000 /* No way in DBX fmt to describe a variable size. */
1001 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1003 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1008 /* Output a definition now. */
1010 fprintf (asmfile, "=");
1013 /* Mark it as defined, so that if it is self-referent
1014 we will not get into an infinite recursion of definitions. */
1016 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED;
1018 switch (TREE_CODE (type))
1022 /* For a void type, just define it as itself; ie, "5=5".
1023 This makes us consider it defined
1024 without saying what it is. The debugger will make it
1025 a void type when the reference is seen, and nothing will
1026 ever override that default. */
1027 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
1032 if (type == char_type_node && ! TREE_UNSIGNED (type))
1033 /* Output the type `char' as a subrange of itself!
1034 I don't understand this definition, just copied it
1035 from the output of pcc.
1036 This used to use `r2' explicitly and we used to
1037 take care to make sure that `char' was type number 2. */
1038 fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type));
1039 else if (use_gnu_debug_info_extensions
1040 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1041 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1043 /* This used to say `r1' and we used to take care
1044 to make sure that `int' was type number 1. */
1045 fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node));
1046 print_int_cst_octal (TYPE_MIN_VALUE (type));
1047 fprintf (asmfile, ";");
1048 print_int_cst_octal (TYPE_MAX_VALUE (type));
1049 fprintf (asmfile, ";");
1051 else /* Output other integer types as subranges of `int'. */
1052 dbxout_range_type (type);
1057 /* This used to say `r1' and we used to take care
1058 to make sure that `int' was type number 1. */
1059 fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node),
1060 int_size_in_bytes (type));
1065 if (use_gnu_debug_info_extensions)
1066 fprintf (asmfile, "@s%d;-20;",
1067 BITS_PER_UNIT * int_size_in_bytes (type));
1069 /* Output the type `char' as a subrange of itself.
1070 That is what pcc seems to do. */
1071 fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node),
1072 TREE_UNSIGNED (type) ? 255 : 127);
1077 if (use_gnu_debug_info_extensions)
1078 fprintf (asmfile, "@s%d;-16;",
1079 BITS_PER_UNIT * int_size_in_bytes (type));
1080 else /* Define as enumeral type (False, True) */
1081 fprintf (asmfile, "eFalse:0,True:1,;");
1086 putc ('d', asmfile);
1088 dbxout_type (TREE_TYPE (type), 0, 0);
1092 /* Differs from the REAL_TYPE by its new data type number */
1094 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1096 fprintf (asmfile, "r%d;%d;0;",
1097 TYPE_SYMTAB_ADDRESS (type),
1098 int_size_in_bytes (TREE_TYPE (type)));
1099 CHARS (15); /* The number is probably incorrect here. */
1103 /* Output a complex integer type as a structure,
1104 pending some other way to do it. */
1105 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1107 fprintf (asmfile, "real:");
1109 dbxout_type (TREE_TYPE (type), 0, 0);
1110 fprintf (asmfile, ",%d,%d;",
1111 0, TYPE_PRECISION (TREE_TYPE (type)));
1113 fprintf (asmfile, "imag:");
1115 dbxout_type (TREE_TYPE (type), 0, 0);
1116 fprintf (asmfile, ",%d,%d;;",
1117 TYPE_PRECISION (TREE_TYPE (type)),
1118 TYPE_PRECISION (TREE_TYPE (type)));
1124 if (use_gnu_debug_info_extensions)
1126 have_used_extensions = 1;
1127 fprintf (asmfile, "@s%d;",
1128 BITS_PER_UNIT * int_size_in_bytes (type));
1129 /* Check if a bitstring type, which in Chill is
1130 different from a [power]set. */
1131 if (TYPE_STRING_FLAG (type))
1132 fprintf (asmfile, "@S;");
1134 putc ('S', asmfile);
1136 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1140 /* Output "a" followed by a range type definition
1141 for the index type of the array
1142 followed by a reference to the target-type.
1143 ar1;0;N;M for a C array of type M and size N+1. */
1144 /* Check if a character string type, which in Chill is
1145 different from an array of characters. */
1146 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1148 have_used_extensions = 1;
1149 fprintf (asmfile, "@S;");
1151 tem = TYPE_DOMAIN (type);
1153 fprintf (asmfile, "ar%d;0;-1;",
1154 TYPE_SYMTAB_ADDRESS (integer_type_node));
1157 fprintf (asmfile, "a");
1158 dbxout_range_type (tem);
1161 dbxout_type (TREE_TYPE (type), 0, 0);
1166 case QUAL_UNION_TYPE:
1168 int i, n_baseclasses = 0;
1170 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1171 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1173 /* Output a structure type. We must use the same test here as we
1174 use in the DBX_NO_XREFS case above. */
1175 if ((TYPE_NAME (type) != 0
1176 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1177 && DECL_IGNORED_P (TYPE_NAME (type)))
1179 || TYPE_SIZE (type) == 0
1180 /* No way in DBX fmt to describe a variable size. */
1181 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1183 /* If the type is just a cross reference, output one
1184 and mark the type as partially described.
1185 If it later becomes defined, we will output
1186 its real definition.
1187 If the type has a name, don't nest its definition within
1188 another type's definition; instead, output an xref
1189 and let the definition come when the name is defined. */
1190 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1192 #if 0 /* This assertion is legitimately false in C++. */
1193 /* We shouldn't be outputting a reference to a type before its
1194 definition unless the type has a tag name.
1195 A typedef name without a tag name should be impossible. */
1196 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1199 if (TYPE_NAME (type) != 0)
1200 dbxout_type_name (type);
1202 fprintf (asmfile, "$$%d", anonymous_type_number++);
1203 fprintf (asmfile, ":");
1204 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1208 /* Identify record or union, and print its size. */
1209 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1210 int_size_in_bytes (type));
1212 if (use_gnu_debug_info_extensions)
1216 have_used_extensions = 1;
1217 fprintf (asmfile, "!%d,", n_baseclasses);
1221 for (i = 0; i < n_baseclasses; i++)
1223 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1224 if (use_gnu_debug_info_extensions)
1226 have_used_extensions = 1;
1227 putc (TREE_VIA_VIRTUAL (child) ? '1'
1230 putc (TREE_VIA_PUBLIC (child) ? '2'
1233 fprintf (asmfile, "%d,",
1234 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1236 dbxout_type (BINFO_TYPE (child), 0, 0);
1237 putc (';', asmfile);
1241 /* Print out the base class information with fields
1242 which have the same names at the types they hold. */
1243 dbxout_type_name (BINFO_TYPE (child));
1244 putc (':', asmfile);
1245 dbxout_type (BINFO_TYPE (child), full, 0);
1246 fprintf (asmfile, ",%d,%d;",
1247 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1248 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1256 /* Write out the field declarations. */
1257 dbxout_type_fields (type);
1258 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1260 have_used_extensions = 1;
1261 dbxout_type_methods (type);
1263 putc (';', asmfile);
1265 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1266 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1267 && TYPE_VFIELD (type))
1269 have_used_extensions = 1;
1271 /* Tell GDB+ that it may keep reading. */
1272 putc ('~', asmfile);
1274 /* We need to write out info about what field this class
1275 uses as its "main" vtable pointer field, because if this
1276 field is inherited from a base class, GDB cannot necessarily
1277 figure out which field it's using in time. */
1278 if (TYPE_VFIELD (type))
1280 putc ('%', asmfile);
1281 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1283 putc (';', asmfile);
1289 /* We must use the same test here as we use in the DBX_NO_XREFS case
1290 above. We simplify it a bit since an enum will never have a variable
1292 if ((TYPE_NAME (type) != 0
1293 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1294 && DECL_IGNORED_P (TYPE_NAME (type)))
1296 || TYPE_SIZE (type) == 0)
1298 fprintf (asmfile, "xe");
1300 dbxout_type_name (type);
1301 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1302 fprintf (asmfile, ":");
1305 #ifdef DBX_OUTPUT_ENUM
1306 DBX_OUTPUT_ENUM (asmfile, type);
1308 if (use_gnu_debug_info_extensions
1309 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1310 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1311 putc ('e', asmfile);
1313 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1315 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1316 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1317 fprintf (asmfile, "%lu",
1318 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1319 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1320 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1321 fprintf (asmfile, "%ld",
1322 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1324 print_int_cst_octal (TREE_VALUE (tem));
1325 fprintf (asmfile, ",");
1326 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1327 if (TREE_CHAIN (tem) != 0)
1330 putc (';', asmfile);
1336 putc ('*', asmfile);
1338 dbxout_type (TREE_TYPE (type), 0, 0);
1342 if (use_gnu_debug_info_extensions)
1344 have_used_extensions = 1;
1345 putc ('#', asmfile);
1347 if (flag_minimal_debug && !show_arg_types)
1349 /* Normally, just output the return type.
1350 The argument types are encoded in the method name. */
1351 putc ('#', asmfile);
1352 dbxout_type (TREE_TYPE (type), 0, 0);
1353 putc (';', asmfile);
1358 /* When outputting destructors, we need to write
1359 the argument types out longhand. */
1360 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1361 putc (',', asmfile);
1363 dbxout_type (TREE_TYPE (type), 0, 0);
1364 dbxout_args (TYPE_ARG_TYPES (type));
1365 putc (';', asmfile);
1371 /* Treat it as a function type. */
1372 dbxout_type (TREE_TYPE (type), 0, 0);
1377 if (use_gnu_debug_info_extensions)
1379 have_used_extensions = 1;
1380 putc ('@', asmfile);
1382 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1383 putc (',', asmfile);
1385 dbxout_type (TREE_TYPE (type), 0, 0);
1389 /* Should print as an int, because it is really
1391 dbxout_type (integer_type_node, 0, 0);
1395 case REFERENCE_TYPE:
1396 if (use_gnu_debug_info_extensions)
1397 have_used_extensions = 1;
1398 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1400 dbxout_type (TREE_TYPE (type), 0, 0);
1404 putc ('f', asmfile);
1406 dbxout_type (TREE_TYPE (type), 0, 0);
1414 /* Print the value of integer constant C, in octal,
1415 handling double precision. */
1418 print_int_cst_octal (c)
1421 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1422 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1423 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1424 int width = TYPE_PRECISION (TREE_TYPE (c));
1426 /* GDB wants constants with no extra leading "1" bits, so
1427 we need to remove any sign-extension that might be
1429 if (width == HOST_BITS_PER_WIDE_INT * 2)
1431 else if (width > HOST_BITS_PER_WIDE_INT)
1432 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1433 else if (width == HOST_BITS_PER_WIDE_INT)
1436 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1438 fprintf (asmfile, "0");
1442 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1443 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1447 unsigned HOST_WIDE_INT beg = high >> excess;
1448 unsigned HOST_WIDE_INT middle
1449 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1450 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1451 unsigned HOST_WIDE_INT end
1452 = low & (((unsigned HOST_WIDE_INT) 1
1453 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1456 fprintf (asmfile, "%o%01o", beg, middle);
1457 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1462 print_octal (value, digits)
1463 unsigned HOST_WIDE_INT value;
1468 for (i = digits - 1; i >= 0; i--)
1469 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1472 /* Output the name of type TYPE, with no punctuation.
1473 Such names can be set up either by typedef declarations
1474 or by struct, enum and union tags. */
1477 dbxout_type_name (type)
1481 if (TYPE_NAME (type) == 0)
1483 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1485 t = TYPE_NAME (type);
1487 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1489 t = DECL_NAME (TYPE_NAME (type));
1494 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1495 CHARS (IDENTIFIER_LENGTH (t));
1498 /* Output a .stabs for the symbol defined by DECL,
1499 which must be a ..._DECL node in the normal namespace.
1500 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1501 LOCAL is nonzero if the scope is less than the entire file. */
1504 dbxout_symbol (decl, local)
1508 tree type = TREE_TYPE (decl);
1509 tree context = NULL_TREE;
1511 /* Cast avoids warning in old compilers. */
1512 current_sym_code = (STAB_CODE_TYPE) 0;
1513 current_sym_value = 0;
1514 current_sym_addr = 0;
1516 /* Ignore nameless syms, but don't ignore type tags. */
1518 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1519 || DECL_IGNORED_P (decl))
1522 dbxout_prepare_symbol (decl);
1524 /* The output will always start with the symbol name,
1525 so always count that in the length-output-so-far. */
1527 if (DECL_NAME (decl) != 0)
1528 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1530 switch (TREE_CODE (decl))
1533 /* Enum values are defined by defining the enum type. */
1537 if (DECL_RTL (decl) == 0)
1539 if (DECL_EXTERNAL (decl))
1541 /* Don't mention a nested function under its parent. */
1542 context = decl_function_context (decl);
1543 if (context == current_function_decl)
1545 if (GET_CODE (DECL_RTL (decl)) != MEM
1546 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1550 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1551 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1552 TREE_PUBLIC (decl) ? 'F' : 'f');
1554 current_sym_code = N_FUN;
1555 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1557 if (TREE_TYPE (type))
1558 dbxout_type (TREE_TYPE (type), 0, 0);
1560 dbxout_type (void_type_node, 0, 0);
1562 /* For a nested function, when that function is compiled,
1563 mention the containing function name
1564 as well as (since dbx wants it) our own assembler-name. */
1566 fprintf (asmfile, ",%s,%s",
1567 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1568 IDENTIFIER_POINTER (DECL_NAME (context)));
1570 dbxout_finish_symbol (decl);
1575 /* This seems all wrong. Outputting most kinds of types gives no name
1576 at all. A true definition gives no name; a cross-ref for a
1577 structure can give the tag name, but not a type name.
1578 It seems that no typedef name is defined by outputting a type. */
1580 /* If this typedef name was defined by outputting the type,
1581 don't duplicate it. */
1582 if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED
1583 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1586 /* Don't output the same typedef twice.
1587 And don't output what language-specific stuff doesn't want output. */
1588 if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl))
1597 if (DECL_NAME (decl))
1599 /* Nonzero means we must output a tag as well as a typedef. */
1602 /* Handle the case of a C++ structure or union
1603 where the TYPE_NAME is a TYPE_DECL
1604 which gives both a typedef name and a tag. */
1605 /* dbx requires the tag first and the typedef second. */
1606 if ((TREE_CODE (type) == RECORD_TYPE
1607 || TREE_CODE (type) == UNION_TYPE
1608 || TREE_CODE (type) == QUAL_UNION_TYPE)
1609 && TYPE_NAME (type) == decl
1610 && !(use_gnu_debug_info_extensions && have_used_extensions)
1611 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1612 /* Distinguish the implicit typedefs of C++
1613 from explicit ones that might be found in C. */
1614 && (!strcmp (lang_identify (), "cplusplus")
1615 /* The following line maybe unnecessary;
1616 in 2.6, try removing it. */
1617 || DECL_SOURCE_LINE (decl) == 0))
1619 tree name = TYPE_NAME (type);
1620 if (TREE_CODE (name) == TYPE_DECL)
1621 name = DECL_NAME (name);
1623 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1624 current_sym_value = 0;
1625 current_sym_addr = 0;
1626 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1628 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1629 IDENTIFIER_POINTER (name));
1630 dbxout_type (type, 1, 0);
1631 dbxout_finish_symbol (NULL_TREE);
1634 /* Output typedef name. */
1635 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1636 IDENTIFIER_POINTER (DECL_NAME (decl)));
1638 /* Short cut way to output a tag also. */
1639 if ((TREE_CODE (type) == RECORD_TYPE
1640 || TREE_CODE (type) == UNION_TYPE
1641 || TREE_CODE (type) == QUAL_UNION_TYPE)
1642 && TYPE_NAME (type) == decl)
1644 if (use_gnu_debug_info_extensions && have_used_extensions)
1646 putc ('T', asmfile);
1647 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1649 #if 0 /* Now we generate the tag for this case up above. */
1655 putc ('t', asmfile);
1656 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1658 dbxout_type (type, 1, 0);
1659 dbxout_finish_symbol (decl);
1663 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1664 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1666 if (tag_needed && TYPE_NAME (type) != 0 && TYPE_SIZE (type) != 0
1667 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1669 /* For a TYPE_DECL with no name, but the type has a name,
1671 This is what represents `struct foo' with no typedef. */
1672 /* In C++, the name of a type is the corresponding typedef.
1673 In C, it is an IDENTIFIER_NODE. */
1674 tree name = TYPE_NAME (type);
1675 if (TREE_CODE (name) == TYPE_DECL)
1676 name = DECL_NAME (name);
1678 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1679 current_sym_value = 0;
1680 current_sym_addr = 0;
1681 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1683 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1684 IDENTIFIER_POINTER (name));
1685 dbxout_type (type, 1, 0);
1686 dbxout_finish_symbol (NULL_TREE);
1690 /* If an enum type has no name, it cannot be referred to,
1691 but we must output it anyway, since the enumeration constants
1692 can be referred to. */
1693 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1695 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1696 current_sym_value = 0;
1697 current_sym_addr = 0;
1698 current_sym_nchars = 2;
1700 /* Some debuggers fail when given NULL names, so give this a
1701 harmless name of ` '. */
1702 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1703 dbxout_type (type, 1, 0);
1704 dbxout_finish_symbol (NULL_TREE);
1707 /* Prevent duplicate output of a typedef. */
1708 TREE_ASM_WRITTEN (decl) = 1;
1713 /* Parm decls go in their own separate chains
1714 and are output by dbxout_reg_parms and dbxout_parms. */
1718 /* Named return value, treat like a VAR_DECL. */
1720 if (DECL_RTL (decl) == 0)
1722 /* Don't mention a variable that is external.
1723 Let the file that defines it describe it. */
1724 if (DECL_EXTERNAL (decl))
1727 /* If the variable is really a constant
1728 and not written in memory, inform the debugger. */
1729 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1730 && DECL_INITIAL (decl) != 0
1731 && ! TREE_ASM_WRITTEN (decl)
1732 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1733 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1735 if (TREE_PUBLIC (decl) == 0)
1737 /* The sun4 assembler does not grok this. */
1738 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1739 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1740 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1742 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1743 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1744 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1746 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1747 ASM_STABS_OP, name, ival, N_LSYM);
1751 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1753 /* don't know how to do this yet. */
1757 /* else it is something we handle like a normal variable. */
1760 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1761 #ifdef LEAF_REG_REMAP
1763 leaf_renumber_regs_insn (DECL_RTL (decl));
1766 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1770 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1771 Add SUFFIX to its name, if SUFFIX is not 0.
1772 Describe the variable as residing in HOME
1773 (usually HOME is DECL_RTL (DECL), but not always). */
1776 dbxout_symbol_location (decl, type, suffix, home)
1784 /* Don't mention a variable at all
1785 if it was completely optimized into nothingness.
1787 If the decl was from an inline function, then it's rtl
1788 is not identically the rtl that was used in this
1789 particular compilation. */
1790 if (GET_CODE (home) == REG)
1792 regno = REGNO (home);
1793 if (regno >= FIRST_PSEUDO_REGISTER)
1796 else if (GET_CODE (home) == SUBREG)
1800 while (GET_CODE (value) == SUBREG)
1802 offset += SUBREG_WORD (value);
1803 value = SUBREG_REG (value);
1805 if (GET_CODE (value) == REG)
1807 regno = REGNO (value);
1808 if (regno >= FIRST_PSEUDO_REGISTER)
1812 alter_subreg (home);
1815 /* The kind-of-variable letter depends on where
1816 the variable is and on the scope of its name:
1817 G and N_GSYM for static storage and global scope,
1818 S for static storage and file scope,
1819 V for static storage and local scope,
1820 for those two, use N_LCSYM if data is in bss segment,
1821 N_STSYM if in data segment, N_FUN otherwise.
1822 (We used N_FUN originally, then changed to N_STSYM
1823 to please GDB. However, it seems that confused ld.
1824 Now GDB has been fixed to like N_FUN, says Kingdon.)
1825 no letter at all, and N_LSYM, for auto variable,
1826 r and N_RSYM for register variable. */
1828 if (GET_CODE (home) == MEM
1829 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1831 if (TREE_PUBLIC (decl))
1834 current_sym_code = N_GSYM;
1838 current_sym_addr = XEXP (home, 0);
1840 letter = decl_function_context (decl) ? 'V' : 'S';
1842 if (!DECL_INITIAL (decl))
1843 current_sym_code = N_LCSYM;
1844 else if (DECL_IN_TEXT_SECTION (decl))
1845 /* This is not quite right, but it's the closest
1846 of all the codes that Unix defines. */
1847 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
1850 /* Ultrix `as' seems to need this. */
1851 #ifdef DBX_STATIC_STAB_DATA_SECTION
1854 current_sym_code = N_STSYM;
1858 else if (regno >= 0)
1861 current_sym_code = N_RSYM;
1862 current_sym_value = DBX_REGISTER_NUMBER (regno);
1864 else if (GET_CODE (home) == MEM
1865 && (GET_CODE (XEXP (home, 0)) == MEM
1866 || (GET_CODE (XEXP (home, 0)) == REG
1867 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
1868 /* If the value is indirect by memory or by a register
1869 that isn't the frame pointer
1870 then it means the object is variable-sized and address through
1871 that register or stack slot. DBX has no way to represent this
1872 so all we can do is output the variable as a pointer.
1873 If it's not a parameter, ignore it.
1874 (VAR_DECLs like this can be made by integrate.c.) */
1876 if (GET_CODE (XEXP (home, 0)) == REG)
1879 current_sym_code = N_RSYM;
1880 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
1884 current_sym_code = N_LSYM;
1885 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
1886 We want the value of that CONST_INT. */
1888 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
1891 /* Effectively do build_pointer_type, but don't cache this type,
1892 since it might be temporary whereas the type it points to
1893 might have been saved for inlining. */
1894 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
1895 type = make_node (POINTER_TYPE);
1896 TREE_TYPE (type) = TREE_TYPE (decl);
1898 else if (GET_CODE (home) == MEM
1899 && GET_CODE (XEXP (home, 0)) == REG)
1901 current_sym_code = N_LSYM;
1902 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1904 else if (GET_CODE (home) == MEM
1905 && GET_CODE (XEXP (home, 0)) == PLUS
1906 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
1908 current_sym_code = N_LSYM;
1909 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
1910 We want the value of that CONST_INT. */
1911 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1913 else if (GET_CODE (home) == MEM
1914 && GET_CODE (XEXP (home, 0)) == CONST)
1916 /* Handle an obscure case which can arise when optimizing and
1917 when there are few available registers. (This is *always*
1918 the case for i386/i486 targets). The RTL looks like
1919 (MEM (CONST ...)) even though this variable is a local `auto'
1920 or a local `register' variable. In effect, what has happened
1921 is that the reload pass has seen that all assignments and
1922 references for one such a local variable can be replaced by
1923 equivalent assignments and references to some static storage
1924 variable, thereby avoiding the need for a register. In such
1925 cases we're forced to lie to debuggers and tell them that
1926 this variable was itself `static'. */
1927 current_sym_code = N_LCSYM;
1929 current_sym_addr = XEXP (XEXP (home, 0), 0);
1931 else if (GET_CODE (home) == CONCAT)
1933 tree subtype = TREE_TYPE (type);
1935 /* If the variable's storage is in two parts,
1936 output each as a separate stab with a modified name. */
1937 if (WORDS_BIG_ENDIAN)
1938 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
1940 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
1942 /* Cast avoids warning in old compilers. */
1943 current_sym_code = (STAB_CODE_TYPE) 0;
1944 current_sym_value = 0;
1945 current_sym_addr = 0;
1946 dbxout_prepare_symbol (decl);
1948 if (WORDS_BIG_ENDIAN)
1949 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
1951 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
1955 /* Address might be a MEM, when DECL is a variable-sized object.
1956 Or it might be const0_rtx, meaning previous passes
1957 want us to ignore this variable. */
1960 /* Ok, start a symtab entry and output the variable name. */
1963 #ifdef DBX_STATIC_BLOCK_START
1964 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
1967 dbxout_symbol_name (decl, suffix, letter);
1968 dbxout_type (type, 0, 0);
1969 dbxout_finish_symbol (decl);
1971 #ifdef DBX_STATIC_BLOCK_END
1972 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
1976 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
1977 Then output LETTER to indicate the kind of location the symbol has. */
1980 dbxout_symbol_name (decl, suffix, letter)
1985 /* One slight hitch: if this is a VAR_DECL which is a static
1986 class member, we must put out the mangled name instead of the
1990 /* Note also that static member (variable) names DO NOT begin
1991 with underscores in .stabs directives. */
1992 if (DECL_LANG_SPECIFIC (decl))
1993 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
1995 name = IDENTIFIER_POINTER (DECL_NAME (decl));
1998 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
1999 (suffix ? suffix : ""));
2001 if (letter) putc (letter, asmfile);
2005 dbxout_prepare_symbol (decl)
2009 char *filename = DECL_SOURCE_FILE (decl);
2011 dbxout_source_file (asmfile, filename);
2016 dbxout_finish_symbol (sym)
2019 #ifdef DBX_FINISH_SYMBOL
2020 DBX_FINISH_SYMBOL (sym);
2023 if (use_gnu_debug_info_extensions && sym != 0)
2024 line = DECL_SOURCE_LINE (sym);
2026 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2027 if (current_sym_addr)
2028 output_addr_const (asmfile, current_sym_addr);
2030 fprintf (asmfile, "%d", current_sym_value);
2031 putc ('\n', asmfile);
2035 /* Output definitions of all the decls in a chain. */
2043 dbxout_symbol (syms, 1);
2044 syms = TREE_CHAIN (syms);
2048 /* The following two functions output definitions of function parameters.
2049 Each parameter gets a definition locating it in the parameter list.
2050 Each parameter that is a register variable gets a second definition
2051 locating it in the register.
2053 Printing or argument lists in gdb uses the definitions that
2054 locate in the parameter list. But reference to the variable in
2055 expressions uses preferentially the definition as a register. */
2057 /* Output definitions, referring to storage in the parmlist,
2058 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2061 dbxout_parms (parms)
2064 for (; parms; parms = TREE_CHAIN (parms))
2065 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2067 dbxout_prepare_symbol (parms);
2069 /* Perform any necessary register eliminations on the parameter's rtl,
2070 so that the debugging output will be accurate. */
2071 DECL_INCOMING_RTL (parms)
2072 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2073 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2074 #ifdef LEAF_REG_REMAP
2077 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2078 leaf_renumber_regs_insn (DECL_RTL (parms));
2082 if (PARM_PASSED_IN_MEMORY (parms))
2084 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2086 /* ??? Here we assume that the parm address is indexed
2087 off the frame pointer or arg pointer.
2088 If that is not true, we produce meaningless results,
2089 but do not crash. */
2090 if (GET_CODE (addr) == PLUS
2091 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2092 current_sym_value = INTVAL (XEXP (addr, 1));
2094 current_sym_value = 0;
2096 current_sym_code = N_PSYM;
2097 current_sym_addr = 0;
2100 if (DECL_NAME (parms))
2102 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2104 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2105 IDENTIFIER_POINTER (DECL_NAME (parms)),
2106 DBX_MEMPARM_STABS_LETTER);
2110 current_sym_nchars = 8;
2111 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2112 DBX_MEMPARM_STABS_LETTER);
2115 if (GET_CODE (DECL_RTL (parms)) == REG
2116 && REGNO (DECL_RTL (parms)) >= 0
2117 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2118 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2121 int original_value = current_sym_value;
2123 /* This is the case where the parm is passed as an int or double
2124 and it is converted to a char, short or float and stored back
2125 in the parmlist. In this case, describe the parm
2126 with the variable's declared type, and adjust the address
2127 if the least significant bytes (which we are using) are not
2129 #if BYTES_BIG_ENDIAN
2130 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2131 current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2132 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2135 if (GET_CODE (DECL_RTL (parms)) == MEM
2136 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2137 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2138 && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value)
2139 dbxout_type (TREE_TYPE (parms), 0, 0);
2142 current_sym_value = original_value;
2143 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2146 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2147 dbxout_finish_symbol (parms);
2149 else if (GET_CODE (DECL_RTL (parms)) == REG)
2152 char regparm_letter;
2154 /* Parm passed in registers and lives in registers or nowhere. */
2156 current_sym_code = DBX_REGPARM_STABS_CODE;
2157 regparm_letter = DBX_REGPARM_STABS_LETTER;
2158 current_sym_addr = 0;
2160 /* If parm lives in a register, use that register;
2161 pretend the parm was passed there. It would be more consistent
2162 to describe the register where the parm was passed,
2163 but in practice that register usually holds something else.
2165 If we use DECL_RTL, then we must use the declared type of
2166 the variable, not the type that it arrived in. */
2167 if (REGNO (DECL_RTL (parms)) >= 0
2168 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2170 best_rtl = DECL_RTL (parms);
2171 parm_type = TREE_TYPE (parms);
2173 /* If the parm lives nowhere, use the register where it was
2174 passed. It is also better to use the declared type here. */
2177 best_rtl = DECL_INCOMING_RTL (parms);
2178 parm_type = TREE_TYPE (parms);
2180 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2183 if (DECL_NAME (parms))
2185 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2186 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2187 IDENTIFIER_POINTER (DECL_NAME (parms)),
2192 current_sym_nchars = 8;
2193 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2197 dbxout_type (parm_type, 0, 0);
2198 dbxout_finish_symbol (parms);
2200 else if (GET_CODE (DECL_RTL (parms)) == MEM
2201 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2202 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2203 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2204 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2205 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2209 /* Parm was passed via invisible reference.
2210 That is, its address was passed in a register.
2211 Output it as if it lived in that register.
2212 The debugger will know from the type
2213 that it was actually passed by invisible reference. */
2215 char regparm_letter;
2216 /* Parm passed in registers and lives in registers or nowhere. */
2218 current_sym_code = DBX_REGPARM_STABS_CODE;
2219 regparm_letter = DBX_REGPARM_STABS_LETTER;
2221 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2222 If it is an unallocated pseudo-reg, then use the register where
2223 it was passed instead. */
2224 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2225 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2226 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2228 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2230 current_sym_addr = 0;
2233 if (DECL_NAME (parms))
2235 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2237 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2238 IDENTIFIER_POINTER (DECL_NAME (parms)),
2239 DBX_REGPARM_STABS_LETTER);
2243 current_sym_nchars = 8;
2244 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2245 DBX_REGPARM_STABS_LETTER);
2248 dbxout_type (TREE_TYPE (parms), 0, 0);
2249 dbxout_finish_symbol (parms);
2251 else if (GET_CODE (DECL_RTL (parms)) == MEM
2252 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2253 /* ??? A constant address for a parm can happen
2254 when the reg it lives in is equiv to a constant in memory.
2255 Should make this not happen, after 2.4. */
2256 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2258 /* Parm was passed in registers but lives on the stack. */
2260 current_sym_code = N_PSYM;
2261 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2262 in which case we want the value of that CONST_INT,
2263 or (MEM (REG ...)) or (MEM (MEM ...)),
2264 in which case we use a value of zero. */
2265 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2266 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2267 current_sym_value = 0;
2269 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2270 current_sym_addr = 0;
2273 if (DECL_NAME (parms))
2275 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2277 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2278 IDENTIFIER_POINTER (DECL_NAME (parms)),
2279 DBX_MEMPARM_STABS_LETTER);
2283 current_sym_nchars = 8;
2284 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2285 DBX_MEMPARM_STABS_LETTER);
2289 = DEBUGGER_ARG_OFFSET (current_sym_value,
2290 XEXP (DECL_RTL (parms), 0));
2291 dbxout_type (TREE_TYPE (parms), 0, 0);
2292 dbxout_finish_symbol (parms);
2297 /* Output definitions for the places where parms live during the function,
2298 when different from where they were passed, when the parms were passed
2301 It is not useful to do this for parms passed in registers
2302 that live during the function in different registers, because it is
2303 impossible to look in the passed register for the passed value,
2304 so we use the within-the-function register to begin with.
2306 PARMS is a chain of PARM_DECL nodes. */
2309 dbxout_reg_parms (parms)
2312 for (; parms; parms = TREE_CHAIN (parms))
2313 if (DECL_NAME (parms))
2315 dbxout_prepare_symbol (parms);
2317 /* Report parms that live in registers during the function
2318 but were passed in memory. */
2319 if (GET_CODE (DECL_RTL (parms)) == REG
2320 && REGNO (DECL_RTL (parms)) >= 0
2321 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
2322 && PARM_PASSED_IN_MEMORY (parms))
2323 dbxout_symbol_location (parms, TREE_TYPE (parms),
2324 0, DECL_RTL (parms));
2325 else if (GET_CODE (DECL_RTL (parms)) == CONCAT
2326 && PARM_PASSED_IN_MEMORY (parms))
2327 dbxout_symbol_location (parms, TREE_TYPE (parms),
2328 0, DECL_RTL (parms));
2329 /* Report parms that live in memory but not where they were passed. */
2330 else if (GET_CODE (DECL_RTL (parms)) == MEM
2331 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2332 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2333 && PARM_PASSED_IN_MEMORY (parms)
2334 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2336 #if 0 /* ??? It is not clear yet what should replace this. */
2337 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
2338 /* A parm declared char is really passed as an int,
2339 so it occupies the least significant bytes.
2340 On a big-endian machine those are not the low-numbered ones. */
2341 #if BYTES_BIG_ENDIAN
2342 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2343 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2344 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2346 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
2348 dbxout_symbol_location (parms, TREE_TYPE (parms),
2349 0, DECL_RTL (parms));
2352 else if (GET_CODE (DECL_RTL (parms)) == MEM
2353 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2355 /* Parm was passed via invisible reference.
2356 That is, its address was passed in a register.
2357 Output it as if it lived in that register.
2358 The debugger will know from the type
2359 that it was actually passed by invisible reference. */
2361 current_sym_code = N_RSYM;
2363 /* DECL_RTL looks like (MEM (REG...). Get the register number. */
2364 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2365 current_sym_addr = 0;
2368 if (DECL_NAME (parms))
2370 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2372 fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP,
2373 IDENTIFIER_POINTER (DECL_NAME (parms)));
2377 current_sym_nchars = 8;
2378 fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP);
2381 dbxout_type (TREE_TYPE (parms), 0, 0);
2382 dbxout_finish_symbol (parms);
2388 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2389 output definitions of those names, in raw form */
2397 putc (',', asmfile);
2398 dbxout_type (TREE_VALUE (args), 0, 0);
2400 args = TREE_CHAIN (args);
2404 /* Given a chain of ..._TYPE nodes,
2405 find those which have typedef names and output those names.
2406 This is to ensure those types get output. */
2409 dbxout_types (types)
2410 register tree types;
2414 if (TYPE_NAME (types)
2415 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2416 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2417 dbxout_symbol (TYPE_NAME (types), 1);
2418 types = TREE_CHAIN (types);
2422 /* Output everything about a symbol block (a BLOCK node
2423 that represents a scope level),
2424 including recursive output of contained blocks.
2426 BLOCK is the BLOCK node.
2427 DEPTH is its depth within containing symbol blocks.
2428 ARGS is usually zero; but for the outermost block of the
2429 body of a function, it is a chain of PARM_DECLs for the function parameters.
2430 We output definitions of all the register parms
2431 as if they were local variables of that block.
2433 If -g1 was used, we count blocks just the same, but output nothing
2434 except for the outermost block.
2436 Actually, BLOCK may be several blocks chained together.
2437 We handle them all in sequence. */
2440 dbxout_block (block, depth, args)
2441 register tree block;
2449 /* Ignore blocks never expanded or otherwise marked as real. */
2450 if (TREE_USED (block))
2452 #ifndef DBX_LBRAC_FIRST
2453 /* In dbx format, the syms of a block come before the N_LBRAC. */
2454 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2455 dbxout_syms (BLOCK_VARS (block));
2457 dbxout_reg_parms (args);
2460 /* Now output an N_LBRAC symbol to represent the beginning of
2461 the block. Use the block's tree-walk order to generate
2462 the assembler symbols LBBn and LBEn
2463 that final will define around the code in this block. */
2464 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2467 blocknum = next_block_number++;
2468 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2470 if (BLOCK_HANDLER_BLOCK (block))
2472 /* A catch block. Must precede N_LBRAC. */
2473 tree decl = BLOCK_VARS (block);
2476 #ifdef DBX_OUTPUT_CATCH
2477 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2479 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2480 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2481 assemble_name (asmfile, buf);
2482 fprintf (asmfile, "\n");
2484 decl = TREE_CHAIN (decl);
2488 #ifdef DBX_OUTPUT_LBRAC
2489 DBX_OUTPUT_LBRAC (asmfile, buf);
2491 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2492 assemble_name (asmfile, buf);
2493 #if DBX_BLOCKS_FUNCTION_RELATIVE
2494 fputc ('-', asmfile);
2495 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2497 fprintf (asmfile, "\n");
2501 /* Count blocks the same way regardless of debug_info_level. */
2502 next_block_number++;
2504 #ifdef DBX_LBRAC_FIRST
2505 /* On some weird machines, the syms of a block
2506 come after the N_LBRAC. */
2507 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2508 dbxout_syms (BLOCK_VARS (block));
2510 dbxout_reg_parms (args);
2513 /* Output the subblocks. */
2514 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2516 /* Refer to the marker for the end of the block. */
2517 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2520 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2521 #ifdef DBX_OUTPUT_RBRAC
2522 DBX_OUTPUT_RBRAC (asmfile, buf);
2524 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2525 assemble_name (asmfile, buf);
2526 #if DBX_BLOCKS_FUNCTION_RELATIVE
2527 fputc ('-', asmfile);
2528 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2530 fprintf (asmfile, "\n");
2534 block = BLOCK_CHAIN (block);
2538 /* Output the information about a function and its arguments and result.
2539 Usually this follows the function's code,
2540 but on some systems, it comes before. */
2543 dbxout_really_begin_function (decl)
2546 dbxout_symbol (decl, 0);
2547 dbxout_parms (DECL_ARGUMENTS (decl));
2548 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2549 dbxout_symbol (DECL_RESULT (decl), 1);
2552 /* Called at beginning of output of function definition. */
2555 dbxout_begin_function (decl)
2558 #ifdef DBX_FUNCTION_FIRST
2559 dbxout_really_begin_function (decl);
2563 /* Output dbx data for a function definition.
2564 This includes a definition of the function name itself (a symbol),
2565 definitions of the parameters (locating them in the parameter list)
2566 and then output the block that makes up the function's body
2567 (including all the auto variables of the function). */
2570 dbxout_function (decl)
2573 #ifndef DBX_FUNCTION_FIRST
2574 dbxout_really_begin_function (decl);
2576 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2577 #ifdef DBX_OUTPUT_FUNCTION_END
2578 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2581 #endif /* DBX_DEBUGGING_INFO */