1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993 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)
987 if ((TYPE_NAME (type) != 0 && !full)
988 || TYPE_SIZE (type) == 0)
990 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
995 /* Output a definition now. */
997 fprintf (asmfile, "=");
1000 /* Mark it as defined, so that if it is self-referent
1001 we will not get into an infinite recursion of definitions. */
1003 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED;
1005 switch (TREE_CODE (type))
1009 /* For a void type, just define it as itself; ie, "5=5".
1010 This makes us consider it defined
1011 without saying what it is. The debugger will make it
1012 a void type when the reference is seen, and nothing will
1013 ever override that default. */
1014 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
1019 if (type == char_type_node && ! TREE_UNSIGNED (type))
1020 /* Output the type `char' as a subrange of itself!
1021 I don't understand this definition, just copied it
1022 from the output of pcc.
1023 This used to use `r2' explicitly and we used to
1024 take care to make sure that `char' was type number 2. */
1025 fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type));
1026 else if (use_gnu_debug_info_extensions
1027 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1028 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1030 /* This used to say `r1' and we used to take care
1031 to make sure that `int' was type number 1. */
1032 fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node));
1033 print_int_cst_octal (TYPE_MIN_VALUE (type));
1034 fprintf (asmfile, ";");
1035 print_int_cst_octal (TYPE_MAX_VALUE (type));
1036 fprintf (asmfile, ";");
1038 else /* Output other integer types as subranges of `int'. */
1039 dbxout_range_type (type);
1044 /* This used to say `r1' and we used to take care
1045 to make sure that `int' was type number 1. */
1046 fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node),
1047 int_size_in_bytes (type));
1052 if (use_gnu_debug_info_extensions)
1053 fprintf (asmfile, "@s%d;-20;",
1054 BITS_PER_UNIT * int_size_in_bytes (type));
1056 /* Output the type `char' as a subrange of itself.
1057 That is what pcc seems to do. */
1058 fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node),
1059 TREE_UNSIGNED (type) ? 255 : 127);
1064 if (use_gnu_debug_info_extensions)
1065 fprintf (asmfile, "@s%d;-16;",
1066 BITS_PER_UNIT * int_size_in_bytes (type));
1067 else /* Define as enumeral type (False, True) */
1068 fprintf (asmfile, "eFalse:0,True:1,;");
1073 putc ('d', asmfile);
1075 dbxout_type (TREE_TYPE (type), 0, 0);
1079 /* Differs from the REAL_TYPE by its new data type number */
1081 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1083 fprintf (asmfile, "r%d;%d;0;",
1084 TYPE_SYMTAB_ADDRESS (type),
1085 int_size_in_bytes (TREE_TYPE (type)));
1086 CHARS (15); /* The number is probably incorrect here. */
1090 /* Output a complex integer type as a structure,
1091 pending some other way to do it. */
1092 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1094 fprintf (asmfile, "real:");
1096 dbxout_type (TREE_TYPE (type), 0, 0);
1097 fprintf (asmfile, ",%d,%d;",
1098 0, TYPE_PRECISION (TREE_TYPE (type)));
1100 fprintf (asmfile, "imag:");
1102 dbxout_type (TREE_TYPE (type), 0, 0);
1103 fprintf (asmfile, ",%d,%d;;",
1104 TYPE_PRECISION (TREE_TYPE (type)),
1105 TYPE_PRECISION (TREE_TYPE (type)));
1111 if (use_gnu_debug_info_extensions)
1113 have_used_extensions = 1;
1114 fprintf (asmfile, "@s%d;",
1115 BITS_PER_UNIT * int_size_in_bytes (type));
1116 /* Check if a bitstring type, which in Chill is
1117 different from a [power]set. */
1118 if (TYPE_STRING_FLAG (type))
1119 fprintf (asmfile, "@S;");
1121 putc ('S', asmfile);
1123 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1127 /* Output "a" followed by a range type definition
1128 for the index type of the array
1129 followed by a reference to the target-type.
1130 ar1;0;N;M for a C array of type M and size N+1. */
1131 /* Check if a character string type, which in Chill is
1132 different from an array of characters. */
1133 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1135 have_used_extensions = 1;
1136 fprintf (asmfile, "@S;");
1138 tem = TYPE_DOMAIN (type);
1140 fprintf (asmfile, "ar%d;0;-1;",
1141 TYPE_SYMTAB_ADDRESS (integer_type_node));
1144 fprintf (asmfile, "a");
1145 dbxout_range_type (tem);
1148 dbxout_type (TREE_TYPE (type), 0, 0);
1153 case QUAL_UNION_TYPE:
1155 int i, n_baseclasses = 0;
1157 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1158 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1160 /* Output a structure type. */
1161 if ((TYPE_NAME (type) != 0
1162 /* Long ago, Tiemann said this creates output that "confuses GDB".
1163 In April 93, mrs@cygnus.com said there is no such problem.
1164 The type decls made automatically by struct specifiers
1165 are marked with DECL_IGNORED_P in C++. */
1166 #if 0 /* This creates output for anonymous classes which confuses GDB. */
1167 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1168 && DECL_IGNORED_P (TYPE_NAME (type)))
1171 || TYPE_SIZE (type) == 0
1172 /* No way in DBX fmt to describe a variable size. */
1173 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1175 /* If the type is just a cross reference, output one
1176 and mark the type as partially described.
1177 If it later becomes defined, we will output
1178 its real definition.
1179 If the type has a name, don't nest its definition within
1180 another type's definition; instead, output an xref
1181 and let the definition come when the name is defined. */
1182 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1184 #if 0 /* This assertion is legitimately false in C++. */
1185 /* We shouldn't be outputting a reference to a type before its
1186 definition unless the type has a tag name.
1187 A typedef name without a tag name should be impossible. */
1188 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1191 if (TYPE_NAME (type) != 0)
1192 dbxout_type_name (type);
1194 fprintf (asmfile, "$$%d", anonymous_type_number++);
1195 fprintf (asmfile, ":");
1196 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1200 /* Identify record or union, and print its size. */
1201 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1202 int_size_in_bytes (type));
1204 if (use_gnu_debug_info_extensions)
1208 have_used_extensions = 1;
1209 fprintf (asmfile, "!%d,", n_baseclasses);
1213 for (i = 0; i < n_baseclasses; i++)
1215 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1216 if (use_gnu_debug_info_extensions)
1218 have_used_extensions = 1;
1219 putc (TREE_VIA_VIRTUAL (child) ? '1'
1222 putc (TREE_VIA_PUBLIC (child) ? '2'
1225 fprintf (asmfile, "%d,",
1226 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1228 dbxout_type (BINFO_TYPE (child), 0, 0);
1229 putc (';', asmfile);
1233 /* Print out the base class information with fields
1234 which have the same names at the types they hold. */
1235 dbxout_type_name (BINFO_TYPE (child));
1236 putc (':', asmfile);
1237 dbxout_type (BINFO_TYPE (child), full, 0);
1238 fprintf (asmfile, ",%d,%d;",
1239 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1240 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1248 /* Write out the field declarations. */
1249 dbxout_type_fields (type);
1250 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1252 have_used_extensions = 1;
1253 dbxout_type_methods (type);
1255 putc (';', asmfile);
1257 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1258 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1259 && TYPE_VFIELD (type))
1261 have_used_extensions = 1;
1263 /* Tell GDB+ that it may keep reading. */
1264 putc ('~', asmfile);
1266 /* We need to write out info about what field this class
1267 uses as its "main" vtable pointer field, because if this
1268 field is inherited from a base class, GDB cannot necessarily
1269 figure out which field it's using in time. */
1270 if (TYPE_VFIELD (type))
1272 putc ('%', asmfile);
1273 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1275 putc (';', asmfile);
1281 if ((TYPE_NAME (type) != 0 && !full
1282 && (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1283 && ! DECL_IGNORED_P (TYPE_NAME (type))))
1284 || TYPE_SIZE (type) == 0)
1286 fprintf (asmfile, "xe");
1288 dbxout_type_name (type);
1289 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1290 fprintf (asmfile, ":");
1293 #ifdef DBX_OUTPUT_ENUM
1294 DBX_OUTPUT_ENUM (asmfile, type);
1296 putc ('e', asmfile);
1298 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1300 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1301 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1302 fprintf (asmfile, "%lu",
1303 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1304 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1305 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1306 fprintf (asmfile, "%ld",
1307 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1309 print_int_cst_octal (TREE_VALUE (tem));
1310 fprintf (asmfile, ",");
1311 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1312 if (TREE_CHAIN (tem) != 0)
1315 putc (';', asmfile);
1321 putc ('*', asmfile);
1323 dbxout_type (TREE_TYPE (type), 0, 0);
1327 if (use_gnu_debug_info_extensions)
1329 have_used_extensions = 1;
1330 putc ('#', asmfile);
1332 if (flag_minimal_debug && !show_arg_types)
1334 /* Normally, just output the return type.
1335 The argument types are encoded in the method name. */
1336 putc ('#', asmfile);
1337 dbxout_type (TREE_TYPE (type), 0, 0);
1338 putc (';', asmfile);
1343 /* When outputting destructors, we need to write
1344 the argument types out longhand. */
1345 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1346 putc (',', asmfile);
1348 dbxout_type (TREE_TYPE (type), 0, 0);
1349 dbxout_args (TYPE_ARG_TYPES (type));
1350 putc (';', asmfile);
1356 /* Treat it as a function type. */
1357 dbxout_type (TREE_TYPE (type), 0, 0);
1362 if (use_gnu_debug_info_extensions)
1364 have_used_extensions = 1;
1365 putc ('@', asmfile);
1367 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1368 putc (',', asmfile);
1370 dbxout_type (TREE_TYPE (type), 0, 0);
1374 /* Should print as an int, because it is really
1376 dbxout_type (integer_type_node, 0, 0);
1380 case REFERENCE_TYPE:
1381 if (use_gnu_debug_info_extensions)
1382 have_used_extensions = 1;
1383 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1385 dbxout_type (TREE_TYPE (type), 0, 0);
1389 putc ('f', asmfile);
1391 dbxout_type (TREE_TYPE (type), 0, 0);
1399 /* Print the value of integer constant C, in octal,
1400 handling double precision. */
1403 print_int_cst_octal (c)
1406 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1407 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1408 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1409 int width = TYPE_PRECISION (TREE_TYPE (c));
1411 /* GDB wants constants with no extra leading "1" bits, so
1412 we need to remove any sign-extension that might be
1414 if (width == HOST_BITS_PER_WIDE_INT * 2)
1416 else if (width > HOST_BITS_PER_WIDE_INT)
1417 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1418 else if (width == HOST_BITS_PER_WIDE_INT)
1421 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1423 fprintf (asmfile, "0");
1427 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1428 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1432 unsigned HOST_WIDE_INT beg = high >> excess;
1433 unsigned HOST_WIDE_INT middle
1434 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1435 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1436 unsigned HOST_WIDE_INT end
1437 = low & (((unsigned HOST_WIDE_INT) 1
1438 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1441 fprintf (asmfile, "%o%01o", beg, middle);
1442 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1447 print_octal (value, digits)
1448 unsigned HOST_WIDE_INT value;
1453 for (i = digits - 1; i >= 0; i--)
1454 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1457 /* Output the name of type TYPE, with no punctuation.
1458 Such names can be set up either by typedef declarations
1459 or by struct, enum and union tags. */
1462 dbxout_type_name (type)
1466 if (TYPE_NAME (type) == 0)
1468 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1470 t = TYPE_NAME (type);
1472 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1474 t = DECL_NAME (TYPE_NAME (type));
1479 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1480 CHARS (IDENTIFIER_LENGTH (t));
1483 /* Output a .stabs for the symbol defined by DECL,
1484 which must be a ..._DECL node in the normal namespace.
1485 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1486 LOCAL is nonzero if the scope is less than the entire file. */
1489 dbxout_symbol (decl, local)
1494 tree type = TREE_TYPE (decl);
1495 tree context = NULL_TREE;
1498 /* Cast avoids warning in old compilers. */
1499 current_sym_code = (STAB_CODE_TYPE) 0;
1500 current_sym_value = 0;
1501 current_sym_addr = 0;
1503 /* Ignore nameless syms, but don't ignore type tags. */
1505 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1506 || DECL_IGNORED_P (decl))
1509 dbxout_prepare_symbol (decl);
1511 /* The output will always start with the symbol name,
1512 so always count that in the length-output-so-far. */
1514 if (DECL_NAME (decl) != 0)
1515 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1517 switch (TREE_CODE (decl))
1520 /* Enum values are defined by defining the enum type. */
1524 if (DECL_RTL (decl) == 0)
1526 if (DECL_EXTERNAL (decl))
1528 /* Don't mention a nested function under its parent. */
1529 context = decl_function_context (decl);
1530 if (context == current_function_decl)
1532 if (GET_CODE (DECL_RTL (decl)) != MEM
1533 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1537 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1538 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1539 TREE_PUBLIC (decl) ? 'F' : 'f');
1541 current_sym_code = N_FUN;
1542 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1544 if (TREE_TYPE (type))
1545 dbxout_type (TREE_TYPE (type), 0, 0);
1547 dbxout_type (void_type_node, 0, 0);
1549 /* For a nested function, when that function is compiled,
1550 mention the containing function name
1551 as well as (since dbx wants it) our own assembler-name. */
1553 fprintf (asmfile, ",%s,%s",
1554 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1555 IDENTIFIER_POINTER (DECL_NAME (context)));
1557 dbxout_finish_symbol (decl);
1562 /* This seems all wrong. Outputting most kinds of types gives no name
1563 at all. A true definition gives no name; a cross-ref for a
1564 structure can give the tag name, but not a type name.
1565 It seems that no typedef name is defined by outputting a type. */
1567 /* If this typedef name was defined by outputting the type,
1568 don't duplicate it. */
1569 if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED
1570 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1573 /* Don't output the same typedef twice.
1574 And don't output what language-specific stuff doesn't want output. */
1575 if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl))
1584 if (DECL_NAME (decl))
1586 /* Nonzero means we must output a tag as well as a typedef. */
1589 /* Handle the case of a C++ structure or union
1590 where the TYPE_NAME is a TYPE_DECL
1591 which gives both a typedef name and a tag. */
1592 /* dbx requires the tag first and the typedef second. */
1593 if ((TREE_CODE (type) == RECORD_TYPE
1594 || TREE_CODE (type) == UNION_TYPE
1595 || TREE_CODE (type) == QUAL_UNION_TYPE)
1596 && TYPE_NAME (type) == decl
1597 && !(use_gnu_debug_info_extensions && have_used_extensions)
1598 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1599 /* Distinguish the implicit typedefs of C++
1600 from explicit ones that might be found in C. */
1601 && (!strcmp (lang_identify (), "cplusplus")
1602 /* The following line maybe unnecessary;
1603 in 2.6, try removing it. */
1604 || DECL_SOURCE_LINE (decl) == 0))
1606 tree name = TYPE_NAME (type);
1607 if (TREE_CODE (name) == TYPE_DECL)
1608 name = DECL_NAME (name);
1610 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1611 current_sym_value = 0;
1612 current_sym_addr = 0;
1613 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1615 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1616 IDENTIFIER_POINTER (name));
1617 dbxout_type (type, 1, 0);
1618 dbxout_finish_symbol (NULL_TREE);
1621 /* Output typedef name. */
1622 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1623 IDENTIFIER_POINTER (DECL_NAME (decl)));
1625 /* Short cut way to output a tag also. */
1626 if ((TREE_CODE (type) == RECORD_TYPE
1627 || TREE_CODE (type) == UNION_TYPE
1628 || TREE_CODE (type) == QUAL_UNION_TYPE)
1629 && TYPE_NAME (type) == decl)
1631 if (use_gnu_debug_info_extensions && have_used_extensions)
1633 putc ('T', asmfile);
1634 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1636 #if 0 /* Now we generate the tag for this case up above. */
1642 putc ('t', asmfile);
1643 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1645 dbxout_type (type, 1, 0);
1646 dbxout_finish_symbol (decl);
1650 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1651 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1653 if (tag_needed && TYPE_NAME (type) != 0 && TYPE_SIZE (type) != 0
1654 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1656 /* For a TYPE_DECL with no name, but the type has a name,
1658 This is what represents `struct foo' with no typedef. */
1659 /* In C++, the name of a type is the corresponding typedef.
1660 In C, it is an IDENTIFIER_NODE. */
1661 tree name = TYPE_NAME (type);
1662 if (TREE_CODE (name) == TYPE_DECL)
1663 name = DECL_NAME (name);
1665 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1666 current_sym_value = 0;
1667 current_sym_addr = 0;
1668 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1670 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1671 IDENTIFIER_POINTER (name));
1672 dbxout_type (type, 1, 0);
1673 dbxout_finish_symbol (NULL_TREE);
1677 /* If an enum type has no name, it cannot be referred to,
1678 but we must output it anyway, since the enumeration constants
1679 can be referred to. */
1680 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1682 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1683 current_sym_value = 0;
1684 current_sym_addr = 0;
1685 current_sym_nchars = 2;
1687 /* Some debuggers fail when given NULL names, so give this a
1688 harmless name of ` '. */
1689 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1690 dbxout_type (type, 1, 0);
1691 dbxout_finish_symbol (NULL_TREE);
1694 /* Prevent duplicate output of a typedef. */
1695 TREE_ASM_WRITTEN (decl) = 1;
1700 /* Parm decls go in their own separate chains
1701 and are output by dbxout_reg_parms and dbxout_parms. */
1705 /* Named return value, treat like a VAR_DECL. */
1707 if (DECL_RTL (decl) == 0)
1709 /* Don't mention a variable that is external.
1710 Let the file that defines it describe it. */
1711 if (DECL_EXTERNAL (decl))
1714 /* If the variable is really a constant
1715 and not written in memory, inform the debugger. */
1716 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1717 && DECL_INITIAL (decl) != 0
1718 && ! TREE_ASM_WRITTEN (decl)
1719 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1720 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1722 if (TREE_PUBLIC (decl) == 0)
1724 /* The sun4 assembler does not grok this. */
1725 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1726 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1727 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1729 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1730 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1731 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1733 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1734 ASM_STABS_OP, name, ival, N_LSYM);
1738 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1740 /* don't know how to do this yet. */
1744 /* else it is something we handle like a normal variable. */
1747 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1748 #ifdef LEAF_REG_REMAP
1750 leaf_renumber_regs_insn (DECL_RTL (decl));
1753 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1757 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1758 Add SUFFIX to its name, if SUFFIX is not 0.
1759 Describe the variable as residing in HOME
1760 (usually HOME is DECL_RTL (DECL), but not always). */
1763 dbxout_symbol_location (decl, type, suffix, home)
1771 /* Don't mention a variable at all
1772 if it was completely optimized into nothingness.
1774 If the decl was from an inline function, then it's rtl
1775 is not identically the rtl that was used in this
1776 particular compilation. */
1777 if (GET_CODE (home) == REG)
1779 regno = REGNO (home);
1780 if (regno >= FIRST_PSEUDO_REGISTER)
1783 else if (GET_CODE (home) == SUBREG)
1787 while (GET_CODE (value) == SUBREG)
1789 offset += SUBREG_WORD (value);
1790 value = SUBREG_REG (value);
1792 if (GET_CODE (value) == REG)
1794 regno = REGNO (value);
1795 if (regno >= FIRST_PSEUDO_REGISTER)
1799 alter_subreg (home);
1802 /* The kind-of-variable letter depends on where
1803 the variable is and on the scope of its name:
1804 G and N_GSYM for static storage and global scope,
1805 S for static storage and file scope,
1806 V for static storage and local scope,
1807 for those two, use N_LCSYM if data is in bss segment,
1808 N_STSYM if in data segment, N_FUN otherwise.
1809 (We used N_FUN originally, then changed to N_STSYM
1810 to please GDB. However, it seems that confused ld.
1811 Now GDB has been fixed to like N_FUN, says Kingdon.)
1812 no letter at all, and N_LSYM, for auto variable,
1813 r and N_RSYM for register variable. */
1815 if (GET_CODE (home) == MEM
1816 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1818 if (TREE_PUBLIC (decl))
1821 current_sym_code = N_GSYM;
1825 current_sym_addr = XEXP (home, 0);
1827 letter = decl_function_context (decl) ? 'V' : 'S';
1829 if (!DECL_INITIAL (decl))
1830 current_sym_code = N_LCSYM;
1831 else if (DECL_IN_TEXT_SECTION (decl))
1832 /* This is not quite right, but it's the closest
1833 of all the codes that Unix defines. */
1834 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
1837 /* Ultrix `as' seems to need this. */
1838 #ifdef DBX_STATIC_STAB_DATA_SECTION
1841 current_sym_code = N_STSYM;
1845 else if (regno >= 0)
1848 current_sym_code = N_RSYM;
1849 current_sym_value = DBX_REGISTER_NUMBER (regno);
1851 else if (GET_CODE (home) == MEM
1852 && (GET_CODE (XEXP (home, 0)) == MEM
1853 || (GET_CODE (XEXP (home, 0)) == REG
1854 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
1855 /* If the value is indirect by memory or by a register
1856 that isn't the frame pointer
1857 then it means the object is variable-sized and address through
1858 that register or stack slot. DBX has no way to represent this
1859 so all we can do is output the variable as a pointer.
1860 If it's not a parameter, ignore it.
1861 (VAR_DECLs like this can be made by integrate.c.) */
1863 if (GET_CODE (XEXP (home, 0)) == REG)
1866 current_sym_code = N_RSYM;
1867 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
1871 current_sym_code = N_LSYM;
1872 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
1873 We want the value of that CONST_INT. */
1875 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
1878 /* Effectively do build_pointer_type, but don't cache this type,
1879 since it might be temporary whereas the type it points to
1880 might have been saved for inlining. */
1881 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
1882 type = make_node (POINTER_TYPE);
1883 TREE_TYPE (type) = TREE_TYPE (decl);
1885 else if (GET_CODE (home) == MEM
1886 && GET_CODE (XEXP (home, 0)) == REG)
1888 current_sym_code = N_LSYM;
1889 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1891 else if (GET_CODE (home) == MEM
1892 && GET_CODE (XEXP (home, 0)) == PLUS
1893 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
1895 current_sym_code = N_LSYM;
1896 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
1897 We want the value of that CONST_INT. */
1898 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1900 else if (GET_CODE (home) == MEM
1901 && GET_CODE (XEXP (home, 0)) == CONST)
1903 /* Handle an obscure case which can arise when optimizing and
1904 when there are few available registers. (This is *always*
1905 the case for i386/i486 targets). The RTL looks like
1906 (MEM (CONST ...)) even though this variable is a local `auto'
1907 or a local `register' variable. In effect, what has happened
1908 is that the reload pass has seen that all assignments and
1909 references for one such a local variable can be replaced by
1910 equivalent assignments and references to some static storage
1911 variable, thereby avoiding the need for a register. In such
1912 cases we're forced to lie to debuggers and tell them that
1913 this variable was itself `static'. */
1914 current_sym_code = N_LCSYM;
1916 current_sym_addr = XEXP (XEXP (home, 0), 0);
1918 else if (GET_CODE (home) == CONCAT)
1920 tree subtype = TREE_TYPE (type);
1922 /* If the variable's storage is in two parts,
1923 output each as a separate stab with a modified name. */
1924 if (WORDS_BIG_ENDIAN)
1925 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
1927 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
1929 /* Cast avoids warning in old compilers. */
1930 current_sym_code = (STAB_CODE_TYPE) 0;
1931 current_sym_value = 0;
1932 current_sym_addr = 0;
1933 dbxout_prepare_symbol (decl);
1935 if (WORDS_BIG_ENDIAN)
1936 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
1938 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
1942 /* Address might be a MEM, when DECL is a variable-sized object.
1943 Or it might be const0_rtx, meaning previous passes
1944 want us to ignore this variable. */
1947 /* Ok, start a symtab entry and output the variable name. */
1950 #ifdef DBX_STATIC_BLOCK_START
1951 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
1954 dbxout_symbol_name (decl, suffix, letter);
1955 dbxout_type (type, 0, 0);
1956 dbxout_finish_symbol (decl);
1958 #ifdef DBX_STATIC_BLOCK_END
1959 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
1963 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
1964 Then output LETTER to indicate the kind of location the symbol has. */
1967 dbxout_symbol_name (decl, suffix, letter)
1972 /* One slight hitch: if this is a VAR_DECL which is a static
1973 class member, we must put out the mangled name instead of the
1977 /* Note also that static member (variable) names DO NOT begin
1978 with underscores in .stabs directives. */
1979 if (DECL_LANG_SPECIFIC (decl))
1980 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
1982 name = IDENTIFIER_POINTER (DECL_NAME (decl));
1985 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
1986 (suffix ? suffix : ""));
1988 if (letter) putc (letter, asmfile);
1992 dbxout_prepare_symbol (decl)
1996 char *filename = DECL_SOURCE_FILE (decl);
1998 dbxout_source_file (asmfile, filename);
2003 dbxout_finish_symbol (sym)
2006 #ifdef DBX_FINISH_SYMBOL
2007 DBX_FINISH_SYMBOL (sym);
2010 if (use_gnu_debug_info_extensions && sym != 0)
2011 line = DECL_SOURCE_LINE (sym);
2013 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2014 if (current_sym_addr)
2015 output_addr_const (asmfile, current_sym_addr);
2017 fprintf (asmfile, "%d", current_sym_value);
2018 putc ('\n', asmfile);
2022 /* Output definitions of all the decls in a chain. */
2030 dbxout_symbol (syms, 1);
2031 syms = TREE_CHAIN (syms);
2035 /* The following two functions output definitions of function parameters.
2036 Each parameter gets a definition locating it in the parameter list.
2037 Each parameter that is a register variable gets a second definition
2038 locating it in the register.
2040 Printing or argument lists in gdb uses the definitions that
2041 locate in the parameter list. But reference to the variable in
2042 expressions uses preferentially the definition as a register. */
2044 /* Output definitions, referring to storage in the parmlist,
2045 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2048 dbxout_parms (parms)
2051 for (; parms; parms = TREE_CHAIN (parms))
2052 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2054 dbxout_prepare_symbol (parms);
2056 /* Perform any necessary register eliminations on the parameter's rtl,
2057 so that the debugging output will be accurate. */
2058 DECL_INCOMING_RTL (parms)
2059 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2060 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2061 #ifdef LEAF_REG_REMAP
2064 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2065 leaf_renumber_regs_insn (DECL_RTL (parms));
2069 if (PARM_PASSED_IN_MEMORY (parms))
2071 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2073 /* ??? Here we assume that the parm address is indexed
2074 off the frame pointer or arg pointer.
2075 If that is not true, we produce meaningless results,
2076 but do not crash. */
2077 if (GET_CODE (addr) == PLUS
2078 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2079 current_sym_value = INTVAL (XEXP (addr, 1));
2081 current_sym_value = 0;
2083 current_sym_code = N_PSYM;
2084 current_sym_addr = 0;
2087 if (DECL_NAME (parms))
2089 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2091 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2092 IDENTIFIER_POINTER (DECL_NAME (parms)),
2093 DBX_MEMPARM_STABS_LETTER);
2097 current_sym_nchars = 8;
2098 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2099 DBX_MEMPARM_STABS_LETTER);
2102 if (GET_CODE (DECL_RTL (parms)) == REG
2103 && REGNO (DECL_RTL (parms)) >= 0
2104 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2105 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2108 int original_value = current_sym_value;
2110 /* This is the case where the parm is passed as an int or double
2111 and it is converted to a char, short or float and stored back
2112 in the parmlist. In this case, describe the parm
2113 with the variable's declared type, and adjust the address
2114 if the least significant bytes (which we are using) are not
2116 #if BYTES_BIG_ENDIAN
2117 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2118 current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2119 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2122 if (GET_CODE (DECL_RTL (parms)) == MEM
2123 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2124 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2125 && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value)
2126 dbxout_type (TREE_TYPE (parms), 0, 0);
2129 current_sym_value = original_value;
2130 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2133 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2134 dbxout_finish_symbol (parms);
2136 else if (GET_CODE (DECL_RTL (parms)) == REG)
2139 char regparm_letter;
2141 /* Parm passed in registers and lives in registers or nowhere. */
2143 current_sym_code = DBX_REGPARM_STABS_CODE;
2144 regparm_letter = DBX_REGPARM_STABS_LETTER;
2145 current_sym_addr = 0;
2147 /* If parm lives in a register, use that register;
2148 pretend the parm was passed there. It would be more consistent
2149 to describe the register where the parm was passed,
2150 but in practice that register usually holds something else.
2152 If we use DECL_RTL, then we must use the declared type of
2153 the variable, not the type that it arrived in. */
2154 if (REGNO (DECL_RTL (parms)) >= 0
2155 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2157 best_rtl = DECL_RTL (parms);
2158 parm_type = TREE_TYPE (parms);
2160 /* If the parm lives nowhere, use the register where it was
2161 passed. It is also better to use the declared type here. */
2164 best_rtl = DECL_INCOMING_RTL (parms);
2165 parm_type = TREE_TYPE (parms);
2167 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2170 if (DECL_NAME (parms))
2172 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2173 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2174 IDENTIFIER_POINTER (DECL_NAME (parms)),
2179 current_sym_nchars = 8;
2180 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2184 dbxout_type (parm_type, 0, 0);
2185 dbxout_finish_symbol (parms);
2187 else if (GET_CODE (DECL_RTL (parms)) == MEM
2188 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2189 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2190 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2191 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2192 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2196 /* Parm was passed via invisible reference.
2197 That is, its address was passed in a register.
2198 Output it as if it lived in that register.
2199 The debugger will know from the type
2200 that it was actually passed by invisible reference. */
2202 char regparm_letter;
2203 /* Parm passed in registers and lives in registers or nowhere. */
2205 current_sym_code = DBX_REGPARM_STABS_CODE;
2206 regparm_letter = DBX_REGPARM_STABS_LETTER;
2208 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2209 If it is an unallocated pseudo-reg, then use the register where
2210 it was passed instead. */
2211 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2212 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2213 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2215 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2217 current_sym_addr = 0;
2220 if (DECL_NAME (parms))
2222 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2224 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2225 IDENTIFIER_POINTER (DECL_NAME (parms)),
2226 DBX_REGPARM_STABS_LETTER);
2230 current_sym_nchars = 8;
2231 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2232 DBX_REGPARM_STABS_LETTER);
2235 dbxout_type (TREE_TYPE (parms), 0, 0);
2236 dbxout_finish_symbol (parms);
2238 else if (GET_CODE (DECL_RTL (parms)) == MEM
2239 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2240 /* ??? A constant address for a parm can happen
2241 when the reg it lives in is equiv to a constant in memory.
2242 Should make this not happen, after 2.4. */
2243 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2245 /* Parm was passed in registers but lives on the stack. */
2247 current_sym_code = N_PSYM;
2248 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2249 in which case we want the value of that CONST_INT,
2250 or (MEM (REG ...)) or (MEM (MEM ...)),
2251 in which case we use a value of zero. */
2252 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2253 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2254 current_sym_value = 0;
2256 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2257 current_sym_addr = 0;
2260 if (DECL_NAME (parms))
2262 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2264 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2265 IDENTIFIER_POINTER (DECL_NAME (parms)),
2266 DBX_MEMPARM_STABS_LETTER);
2270 current_sym_nchars = 8;
2271 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2272 DBX_MEMPARM_STABS_LETTER);
2276 = DEBUGGER_ARG_OFFSET (current_sym_value,
2277 XEXP (DECL_RTL (parms), 0));
2278 dbxout_type (TREE_TYPE (parms), 0, 0);
2279 dbxout_finish_symbol (parms);
2284 /* Output definitions for the places where parms live during the function,
2285 when different from where they were passed, when the parms were passed
2288 It is not useful to do this for parms passed in registers
2289 that live during the function in different registers, because it is
2290 impossible to look in the passed register for the passed value,
2291 so we use the within-the-function register to begin with.
2293 PARMS is a chain of PARM_DECL nodes. */
2296 dbxout_reg_parms (parms)
2299 for (; parms; parms = TREE_CHAIN (parms))
2300 if (DECL_NAME (parms))
2302 dbxout_prepare_symbol (parms);
2304 /* Report parms that live in registers during the function
2305 but were passed in memory. */
2306 if (GET_CODE (DECL_RTL (parms)) == REG
2307 && REGNO (DECL_RTL (parms)) >= 0
2308 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
2309 && PARM_PASSED_IN_MEMORY (parms))
2310 dbxout_symbol_location (parms, TREE_TYPE (parms),
2311 0, DECL_RTL (parms));
2312 else if (GET_CODE (DECL_RTL (parms)) == CONCAT
2313 && PARM_PASSED_IN_MEMORY (parms))
2314 dbxout_symbol_location (parms, TREE_TYPE (parms),
2315 0, DECL_RTL (parms));
2316 /* Report parms that live in memory but not where they were passed. */
2317 else if (GET_CODE (DECL_RTL (parms)) == MEM
2318 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2319 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2320 && PARM_PASSED_IN_MEMORY (parms)
2321 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2323 #if 0 /* ??? It is not clear yet what should replace this. */
2324 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
2325 /* A parm declared char is really passed as an int,
2326 so it occupies the least significant bytes.
2327 On a big-endian machine those are not the low-numbered ones. */
2328 #if BYTES_BIG_ENDIAN
2329 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2330 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2331 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2333 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
2335 dbxout_symbol_location (parms, TREE_TYPE (parms),
2336 0, DECL_RTL (parms));
2339 else if (GET_CODE (DECL_RTL (parms)) == MEM
2340 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2342 /* Parm was passed via invisible reference.
2343 That is, its address was passed in a register.
2344 Output it as if it lived in that register.
2345 The debugger will know from the type
2346 that it was actually passed by invisible reference. */
2348 current_sym_code = N_RSYM;
2350 /* DECL_RTL looks like (MEM (REG...). Get the register number. */
2351 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2352 current_sym_addr = 0;
2355 if (DECL_NAME (parms))
2357 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2359 fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP,
2360 IDENTIFIER_POINTER (DECL_NAME (parms)));
2364 current_sym_nchars = 8;
2365 fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP);
2368 dbxout_type (TREE_TYPE (parms), 0, 0);
2369 dbxout_finish_symbol (parms);
2375 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2376 output definitions of those names, in raw form */
2384 putc (',', asmfile);
2385 dbxout_type (TREE_VALUE (args), 0, 0);
2387 args = TREE_CHAIN (args);
2391 /* Given a chain of ..._TYPE nodes,
2392 find those which have typedef names and output those names.
2393 This is to ensure those types get output. */
2396 dbxout_types (types)
2397 register tree types;
2401 if (TYPE_NAME (types)
2402 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2403 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2404 dbxout_symbol (TYPE_NAME (types), 1);
2405 types = TREE_CHAIN (types);
2409 /* Output everything about a symbol block (a BLOCK node
2410 that represents a scope level),
2411 including recursive output of contained blocks.
2413 BLOCK is the BLOCK node.
2414 DEPTH is its depth within containing symbol blocks.
2415 ARGS is usually zero; but for the outermost block of the
2416 body of a function, it is a chain of PARM_DECLs for the function parameters.
2417 We output definitions of all the register parms
2418 as if they were local variables of that block.
2420 If -g1 was used, we count blocks just the same, but output nothing
2421 except for the outermost block.
2423 Actually, BLOCK may be several blocks chained together.
2424 We handle them all in sequence. */
2427 dbxout_block (block, depth, args)
2428 register tree block;
2436 /* Ignore blocks never expanded or otherwise marked as real. */
2437 if (TREE_USED (block))
2439 #ifndef DBX_LBRAC_FIRST
2440 /* In dbx format, the syms of a block come before the N_LBRAC. */
2441 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2442 dbxout_syms (BLOCK_VARS (block));
2444 dbxout_reg_parms (args);
2447 /* Now output an N_LBRAC symbol to represent the beginning of
2448 the block. Use the block's tree-walk order to generate
2449 the assembler symbols LBBn and LBEn
2450 that final will define around the code in this block. */
2451 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2454 blocknum = next_block_number++;
2455 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2457 if (BLOCK_HANDLER_BLOCK (block))
2459 /* A catch block. Must precede N_LBRAC. */
2460 tree decl = BLOCK_VARS (block);
2463 #ifdef DBX_OUTPUT_CATCH
2464 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2466 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2467 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2468 assemble_name (asmfile, buf);
2469 fprintf (asmfile, "\n");
2471 decl = TREE_CHAIN (decl);
2475 #ifdef DBX_OUTPUT_LBRAC
2476 DBX_OUTPUT_LBRAC (asmfile, buf);
2478 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2479 assemble_name (asmfile, buf);
2480 #if DBX_BLOCKS_FUNCTION_RELATIVE
2481 fputc ('-', asmfile);
2482 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2484 fprintf (asmfile, "\n");
2488 /* Count blocks the same way regardless of debug_info_level. */
2489 next_block_number++;
2491 #ifdef DBX_LBRAC_FIRST
2492 /* On some weird machines, the syms of a block
2493 come after the N_LBRAC. */
2494 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2495 dbxout_syms (BLOCK_VARS (block));
2497 dbxout_reg_parms (args);
2500 /* Output the subblocks. */
2501 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2503 /* Refer to the marker for the end of the block. */
2504 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2507 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2508 #ifdef DBX_OUTPUT_RBRAC
2509 DBX_OUTPUT_RBRAC (asmfile, buf);
2511 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2512 assemble_name (asmfile, buf);
2513 #if DBX_BLOCKS_FUNCTION_RELATIVE
2514 fputc ('-', asmfile);
2515 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2517 fprintf (asmfile, "\n");
2521 block = BLOCK_CHAIN (block);
2525 /* Output the information about a function and its arguments and result.
2526 Usually this follows the function's code,
2527 but on some systems, it comes before. */
2530 dbxout_really_begin_function (decl)
2533 dbxout_symbol (decl, 0);
2534 dbxout_parms (DECL_ARGUMENTS (decl));
2535 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2536 dbxout_symbol (DECL_RESULT (decl), 1);
2539 /* Called at beginning of output of function definition. */
2542 dbxout_begin_function (decl)
2545 #ifdef DBX_FUNCTION_FIRST
2546 dbxout_really_begin_function (decl);
2550 /* Output dbx data for a function definition.
2551 This includes a definition of the function name itself (a symbol),
2552 definitions of the parameters (locating them in the parameter list)
2553 and then output the block that makes up the function's body
2554 (including all the auto variables of the function). */
2557 dbxout_function (decl)
2560 #ifndef DBX_FUNCTION_FIRST
2561 dbxout_really_begin_function (decl);
2563 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2564 #ifdef DBX_OUTPUT_FUNCTION_END
2565 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2568 #endif /* DBX_DEBUGGING_INFO */