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);
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 && TYPE_DECL_SUPPRESS_DEBUG (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 int len = typevec_len * 2 * sizeof typevec[0];
945 typevec = (enum typestatus *) xrealloc (typevec, len);
946 bzero ((char *) (typevec + typevec_len), len);
951 /* Output the number of this type, to refer to it. */
952 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
955 #ifdef DBX_TYPE_DEFINED
956 if (DBX_TYPE_DEFINED (type))
960 /* If this type's definition has been output or is now being output,
963 switch (typevec[TYPE_SYMTAB_ADDRESS (type)])
968 /* If we have already had a cross reference,
969 and either that's all we want or that's the best we could do,
970 don't repeat the cross reference.
971 Sun dbx crashes if we do. */
972 if (! full || TYPE_SIZE (type) == 0
973 /* No way in DBX fmt to describe a variable size. */
974 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
982 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
983 leave the type-number completely undefined rather than output
984 a cross-reference. If we have already used GNU debug info extensions,
985 then it is OK to output a cross reference. This is necessary to get
986 proper C++ debug output. */
987 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
988 || TREE_CODE (type) == QUAL_UNION_TYPE
989 || TREE_CODE (type) == ENUMERAL_TYPE)
990 && ! use_gnu_debug_info_extensions)
991 /* We must use the same test here as we use twice below when deciding
992 whether to emit a cross-reference. */
993 if ((TYPE_NAME (type) != 0
994 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
995 && DECL_IGNORED_P (TYPE_NAME (type)))
997 || TYPE_SIZE (type) == 0
998 /* No way in DBX fmt to describe a variable size. */
999 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1001 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1006 /* Output a definition now. */
1008 fprintf (asmfile, "=");
1011 /* Mark it as defined, so that if it is self-referent
1012 we will not get into an infinite recursion of definitions. */
1014 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED;
1016 switch (TREE_CODE (type))
1020 /* For a void type, just define it as itself; ie, "5=5".
1021 This makes us consider it defined
1022 without saying what it is. The debugger will make it
1023 a void type when the reference is seen, and nothing will
1024 ever override that default. */
1025 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
1030 if (type == char_type_node && ! TREE_UNSIGNED (type))
1031 /* Output the type `char' as a subrange of itself!
1032 I don't understand this definition, just copied it
1033 from the output of pcc.
1034 This used to use `r2' explicitly and we used to
1035 take care to make sure that `char' was type number 2. */
1036 fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type));
1037 else if (use_gnu_debug_info_extensions
1038 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1039 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1041 /* This used to say `r1' and we used to take care
1042 to make sure that `int' was type number 1. */
1043 fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node));
1044 print_int_cst_octal (TYPE_MIN_VALUE (type));
1045 fprintf (asmfile, ";");
1046 print_int_cst_octal (TYPE_MAX_VALUE (type));
1047 fprintf (asmfile, ";");
1049 else /* Output other integer types as subranges of `int'. */
1050 dbxout_range_type (type);
1055 /* This used to say `r1' and we used to take care
1056 to make sure that `int' was type number 1. */
1057 fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node),
1058 int_size_in_bytes (type));
1063 if (use_gnu_debug_info_extensions)
1064 fprintf (asmfile, "@s%d;-20;",
1065 BITS_PER_UNIT * int_size_in_bytes (type));
1067 /* Output the type `char' as a subrange of itself.
1068 That is what pcc seems to do. */
1069 fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node),
1070 TREE_UNSIGNED (type) ? 255 : 127);
1075 if (use_gnu_debug_info_extensions)
1076 fprintf (asmfile, "@s%d;-16;",
1077 BITS_PER_UNIT * int_size_in_bytes (type));
1078 else /* Define as enumeral type (False, True) */
1079 fprintf (asmfile, "eFalse:0,True:1,;");
1084 putc ('d', asmfile);
1086 dbxout_type (TREE_TYPE (type), 0, 0);
1090 /* Differs from the REAL_TYPE by its new data type number */
1092 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1094 fprintf (asmfile, "r%d;%d;0;",
1095 TYPE_SYMTAB_ADDRESS (type),
1096 int_size_in_bytes (TREE_TYPE (type)));
1097 CHARS (15); /* The number is probably incorrect here. */
1101 /* Output a complex integer type as a structure,
1102 pending some other way to do it. */
1103 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1105 fprintf (asmfile, "real:");
1107 dbxout_type (TREE_TYPE (type), 0, 0);
1108 fprintf (asmfile, ",%d,%d;",
1109 0, TYPE_PRECISION (TREE_TYPE (type)));
1111 fprintf (asmfile, "imag:");
1113 dbxout_type (TREE_TYPE (type), 0, 0);
1114 fprintf (asmfile, ",%d,%d;;",
1115 TYPE_PRECISION (TREE_TYPE (type)),
1116 TYPE_PRECISION (TREE_TYPE (type)));
1122 if (use_gnu_debug_info_extensions)
1124 have_used_extensions = 1;
1125 fprintf (asmfile, "@s%d;",
1126 BITS_PER_UNIT * int_size_in_bytes (type));
1127 /* Check if a bitstring type, which in Chill is
1128 different from a [power]set. */
1129 if (TYPE_STRING_FLAG (type))
1130 fprintf (asmfile, "@S;");
1132 putc ('S', asmfile);
1134 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1138 /* Output "a" followed by a range type definition
1139 for the index type of the array
1140 followed by a reference to the target-type.
1141 ar1;0;N;M for a C array of type M and size N+1. */
1142 /* Check if a character string type, which in Chill is
1143 different from an array of characters. */
1144 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1146 have_used_extensions = 1;
1147 fprintf (asmfile, "@S;");
1149 tem = TYPE_DOMAIN (type);
1151 fprintf (asmfile, "ar%d;0;-1;",
1152 TYPE_SYMTAB_ADDRESS (integer_type_node));
1155 fprintf (asmfile, "a");
1156 dbxout_range_type (tem);
1159 dbxout_type (TREE_TYPE (type), 0, 0);
1164 case QUAL_UNION_TYPE:
1166 int i, n_baseclasses = 0;
1168 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1169 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1171 /* Output a structure type. We must use the same test here as we
1172 use in the DBX_NO_XREFS case above. */
1173 if ((TYPE_NAME (type) != 0
1174 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1175 && DECL_IGNORED_P (TYPE_NAME (type)))
1177 || TYPE_SIZE (type) == 0
1178 /* No way in DBX fmt to describe a variable size. */
1179 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1181 /* If the type is just a cross reference, output one
1182 and mark the type as partially described.
1183 If it later becomes defined, we will output
1184 its real definition.
1185 If the type has a name, don't nest its definition within
1186 another type's definition; instead, output an xref
1187 and let the definition come when the name is defined. */
1188 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1190 #if 0 /* This assertion is legitimately false in C++. */
1191 /* We shouldn't be outputting a reference to a type before its
1192 definition unless the type has a tag name.
1193 A typedef name without a tag name should be impossible. */
1194 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1197 if (TYPE_NAME (type) != 0)
1198 dbxout_type_name (type);
1200 fprintf (asmfile, "$$%d", anonymous_type_number++);
1201 fprintf (asmfile, ":");
1202 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1206 /* Identify record or union, and print its size. */
1207 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1208 int_size_in_bytes (type));
1210 if (use_gnu_debug_info_extensions)
1214 have_used_extensions = 1;
1215 fprintf (asmfile, "!%d,", n_baseclasses);
1219 for (i = 0; i < n_baseclasses; i++)
1221 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1222 if (use_gnu_debug_info_extensions)
1224 have_used_extensions = 1;
1225 putc (TREE_VIA_VIRTUAL (child) ? '1'
1228 putc (TREE_VIA_PUBLIC (child) ? '2'
1231 fprintf (asmfile, "%d,",
1232 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1234 dbxout_type (BINFO_TYPE (child), 0, 0);
1235 putc (';', asmfile);
1239 /* Print out the base class information with fields
1240 which have the same names at the types they hold. */
1241 dbxout_type_name (BINFO_TYPE (child));
1242 putc (':', asmfile);
1243 dbxout_type (BINFO_TYPE (child), full, 0);
1244 fprintf (asmfile, ",%d,%d;",
1245 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1246 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1254 /* Write out the field declarations. */
1255 dbxout_type_fields (type);
1256 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1258 have_used_extensions = 1;
1259 dbxout_type_methods (type);
1261 putc (';', asmfile);
1263 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1264 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1265 && TYPE_VFIELD (type))
1267 have_used_extensions = 1;
1269 /* Tell GDB+ that it may keep reading. */
1270 putc ('~', asmfile);
1272 /* We need to write out info about what field this class
1273 uses as its "main" vtable pointer field, because if this
1274 field is inherited from a base class, GDB cannot necessarily
1275 figure out which field it's using in time. */
1276 if (TYPE_VFIELD (type))
1278 putc ('%', asmfile);
1279 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1281 putc (';', asmfile);
1287 /* We must use the same test here as we use in the DBX_NO_XREFS case
1288 above. We simplify it a bit since an enum will never have a variable
1290 if ((TYPE_NAME (type) != 0
1291 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1292 && DECL_IGNORED_P (TYPE_NAME (type)))
1294 || TYPE_SIZE (type) == 0)
1296 fprintf (asmfile, "xe");
1298 dbxout_type_name (type);
1299 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1300 fprintf (asmfile, ":");
1303 #ifdef DBX_OUTPUT_ENUM
1304 DBX_OUTPUT_ENUM (asmfile, type);
1306 if (use_gnu_debug_info_extensions
1307 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1308 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1309 putc ('e', asmfile);
1311 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1313 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1314 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1315 fprintf (asmfile, "%lu",
1316 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1317 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1318 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1319 fprintf (asmfile, "%ld",
1320 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1322 print_int_cst_octal (TREE_VALUE (tem));
1323 fprintf (asmfile, ",");
1324 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1325 if (TREE_CHAIN (tem) != 0)
1328 putc (';', asmfile);
1334 putc ('*', asmfile);
1336 dbxout_type (TREE_TYPE (type), 0, 0);
1340 if (use_gnu_debug_info_extensions)
1342 have_used_extensions = 1;
1343 putc ('#', asmfile);
1345 if (flag_minimal_debug && !show_arg_types)
1347 /* Normally, just output the return type.
1348 The argument types are encoded in the method name. */
1349 putc ('#', asmfile);
1350 dbxout_type (TREE_TYPE (type), 0, 0);
1351 putc (';', asmfile);
1356 /* When outputting destructors, we need to write
1357 the argument types out longhand. */
1358 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1359 putc (',', asmfile);
1361 dbxout_type (TREE_TYPE (type), 0, 0);
1362 dbxout_args (TYPE_ARG_TYPES (type));
1363 putc (';', asmfile);
1369 /* Treat it as a function type. */
1370 dbxout_type (TREE_TYPE (type), 0, 0);
1375 if (use_gnu_debug_info_extensions)
1377 have_used_extensions = 1;
1378 putc ('@', asmfile);
1380 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1381 putc (',', asmfile);
1383 dbxout_type (TREE_TYPE (type), 0, 0);
1387 /* Should print as an int, because it is really
1389 dbxout_type (integer_type_node, 0, 0);
1393 case REFERENCE_TYPE:
1394 if (use_gnu_debug_info_extensions)
1395 have_used_extensions = 1;
1396 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1398 dbxout_type (TREE_TYPE (type), 0, 0);
1402 putc ('f', asmfile);
1404 dbxout_type (TREE_TYPE (type), 0, 0);
1412 /* Print the value of integer constant C, in octal,
1413 handling double precision. */
1416 print_int_cst_octal (c)
1419 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1420 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1421 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1422 int width = TYPE_PRECISION (TREE_TYPE (c));
1424 /* GDB wants constants with no extra leading "1" bits, so
1425 we need to remove any sign-extension that might be
1427 if (width == HOST_BITS_PER_WIDE_INT * 2)
1429 else if (width > HOST_BITS_PER_WIDE_INT)
1430 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1431 else if (width == HOST_BITS_PER_WIDE_INT)
1434 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1436 fprintf (asmfile, "0");
1440 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1441 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1445 unsigned HOST_WIDE_INT beg = high >> excess;
1446 unsigned HOST_WIDE_INT middle
1447 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1448 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1449 unsigned HOST_WIDE_INT end
1450 = low & (((unsigned HOST_WIDE_INT) 1
1451 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1454 fprintf (asmfile, "%o%01o", beg, middle);
1455 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1460 print_octal (value, digits)
1461 unsigned HOST_WIDE_INT value;
1466 for (i = digits - 1; i >= 0; i--)
1467 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1470 /* Output the name of type TYPE, with no punctuation.
1471 Such names can be set up either by typedef declarations
1472 or by struct, enum and union tags. */
1475 dbxout_type_name (type)
1479 if (TYPE_NAME (type) == 0)
1481 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1483 t = TYPE_NAME (type);
1485 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1487 t = DECL_NAME (TYPE_NAME (type));
1492 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1493 CHARS (IDENTIFIER_LENGTH (t));
1496 /* Output a .stabs for the symbol defined by DECL,
1497 which must be a ..._DECL node in the normal namespace.
1498 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1499 LOCAL is nonzero if the scope is less than the entire file. */
1502 dbxout_symbol (decl, local)
1506 tree type = TREE_TYPE (decl);
1507 tree context = NULL_TREE;
1509 /* Cast avoids warning in old compilers. */
1510 current_sym_code = (STAB_CODE_TYPE) 0;
1511 current_sym_value = 0;
1512 current_sym_addr = 0;
1514 /* Ignore nameless syms, but don't ignore type tags. */
1516 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1517 || DECL_IGNORED_P (decl))
1520 dbxout_prepare_symbol (decl);
1522 /* The output will always start with the symbol name,
1523 so always count that in the length-output-so-far. */
1525 if (DECL_NAME (decl) != 0)
1526 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1528 switch (TREE_CODE (decl))
1531 /* Enum values are defined by defining the enum type. */
1535 if (DECL_RTL (decl) == 0)
1537 if (DECL_EXTERNAL (decl))
1539 /* Don't mention a nested function under its parent. */
1540 context = decl_function_context (decl);
1541 if (context == current_function_decl)
1543 if (GET_CODE (DECL_RTL (decl)) != MEM
1544 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1548 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1549 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1550 TREE_PUBLIC (decl) ? 'F' : 'f');
1552 current_sym_code = N_FUN;
1553 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1555 if (TREE_TYPE (type))
1556 dbxout_type (TREE_TYPE (type), 0, 0);
1558 dbxout_type (void_type_node, 0, 0);
1560 /* For a nested function, when that function is compiled,
1561 mention the containing function name
1562 as well as (since dbx wants it) our own assembler-name. */
1564 fprintf (asmfile, ",%s,%s",
1565 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1566 IDENTIFIER_POINTER (DECL_NAME (context)));
1568 dbxout_finish_symbol (decl);
1573 /* This seems all wrong. Outputting most kinds of types gives no name
1574 at all. A true definition gives no name; a cross-ref for a
1575 structure can give the tag name, but not a type name.
1576 It seems that no typedef name is defined by outputting a type. */
1578 /* If this typedef name was defined by outputting the type,
1579 don't duplicate it. */
1580 if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED
1581 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1584 /* Don't output the same typedef twice.
1585 And don't output what language-specific stuff doesn't want output. */
1586 if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl))
1595 if (DECL_NAME (decl))
1597 /* Nonzero means we must output a tag as well as a typedef. */
1600 /* Handle the case of a C++ structure or union
1601 where the TYPE_NAME is a TYPE_DECL
1602 which gives both a typedef name and a tag. */
1603 /* dbx requires the tag first and the typedef second. */
1604 if ((TREE_CODE (type) == RECORD_TYPE
1605 || TREE_CODE (type) == UNION_TYPE
1606 || TREE_CODE (type) == QUAL_UNION_TYPE)
1607 && TYPE_NAME (type) == decl
1608 && !(use_gnu_debug_info_extensions && have_used_extensions)
1609 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1610 /* Distinguish the implicit typedefs of C++
1611 from explicit ones that might be found in C. */
1612 && (!strcmp (lang_identify (), "cplusplus")
1613 /* The following line maybe unnecessary;
1614 in 2.6, try removing it. */
1615 || DECL_SOURCE_LINE (decl) == 0))
1617 tree name = TYPE_NAME (type);
1618 if (TREE_CODE (name) == TYPE_DECL)
1619 name = DECL_NAME (name);
1621 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1622 current_sym_value = 0;
1623 current_sym_addr = 0;
1624 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1626 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1627 IDENTIFIER_POINTER (name));
1628 dbxout_type (type, 1, 0);
1629 dbxout_finish_symbol (NULL_TREE);
1632 /* Output typedef name. */
1633 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1634 IDENTIFIER_POINTER (DECL_NAME (decl)));
1636 /* Short cut way to output a tag also. */
1637 if ((TREE_CODE (type) == RECORD_TYPE
1638 || TREE_CODE (type) == UNION_TYPE
1639 || TREE_CODE (type) == QUAL_UNION_TYPE)
1640 && TYPE_NAME (type) == decl)
1642 if (use_gnu_debug_info_extensions && have_used_extensions)
1644 putc ('T', asmfile);
1645 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1647 #if 0 /* Now we generate the tag for this case up above. */
1653 putc ('t', asmfile);
1654 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1656 dbxout_type (type, 1, 0);
1657 dbxout_finish_symbol (decl);
1661 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1662 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1664 if (tag_needed && TYPE_NAME (type) != 0 && TYPE_SIZE (type) != 0
1665 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1667 /* For a TYPE_DECL with no name, but the type has a name,
1669 This is what represents `struct foo' with no typedef. */
1670 /* In C++, the name of a type is the corresponding typedef.
1671 In C, it is an IDENTIFIER_NODE. */
1672 tree name = TYPE_NAME (type);
1673 if (TREE_CODE (name) == TYPE_DECL)
1674 name = DECL_NAME (name);
1676 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1677 current_sym_value = 0;
1678 current_sym_addr = 0;
1679 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1681 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1682 IDENTIFIER_POINTER (name));
1683 dbxout_type (type, 1, 0);
1684 dbxout_finish_symbol (NULL_TREE);
1688 /* If an enum type has no name, it cannot be referred to,
1689 but we must output it anyway, since the enumeration constants
1690 can be referred to. */
1691 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1693 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1694 current_sym_value = 0;
1695 current_sym_addr = 0;
1696 current_sym_nchars = 2;
1698 /* Some debuggers fail when given NULL names, so give this a
1699 harmless name of ` '. */
1700 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1701 dbxout_type (type, 1, 0);
1702 dbxout_finish_symbol (NULL_TREE);
1705 /* Prevent duplicate output of a typedef. */
1706 TREE_ASM_WRITTEN (decl) = 1;
1711 /* Parm decls go in their own separate chains
1712 and are output by dbxout_reg_parms and dbxout_parms. */
1716 /* Named return value, treat like a VAR_DECL. */
1718 if (DECL_RTL (decl) == 0)
1720 /* Don't mention a variable that is external.
1721 Let the file that defines it describe it. */
1722 if (DECL_EXTERNAL (decl))
1725 /* If the variable is really a constant
1726 and not written in memory, inform the debugger. */
1727 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1728 && DECL_INITIAL (decl) != 0
1729 && ! TREE_ASM_WRITTEN (decl)
1730 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1731 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1733 if (TREE_PUBLIC (decl) == 0)
1735 /* The sun4 assembler does not grok this. */
1736 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1737 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1738 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1740 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1741 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1742 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1744 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1745 ASM_STABS_OP, name, ival, N_LSYM);
1749 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1751 /* don't know how to do this yet. */
1755 /* else it is something we handle like a normal variable. */
1758 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1759 #ifdef LEAF_REG_REMAP
1761 leaf_renumber_regs_insn (DECL_RTL (decl));
1764 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1768 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1769 Add SUFFIX to its name, if SUFFIX is not 0.
1770 Describe the variable as residing in HOME
1771 (usually HOME is DECL_RTL (DECL), but not always). */
1774 dbxout_symbol_location (decl, type, suffix, home)
1782 /* Don't mention a variable at all
1783 if it was completely optimized into nothingness.
1785 If the decl was from an inline function, then it's rtl
1786 is not identically the rtl that was used in this
1787 particular compilation. */
1788 if (GET_CODE (home) == REG)
1790 regno = REGNO (home);
1791 if (regno >= FIRST_PSEUDO_REGISTER)
1794 else if (GET_CODE (home) == SUBREG)
1798 while (GET_CODE (value) == SUBREG)
1800 offset += SUBREG_WORD (value);
1801 value = SUBREG_REG (value);
1803 if (GET_CODE (value) == REG)
1805 regno = REGNO (value);
1806 if (regno >= FIRST_PSEUDO_REGISTER)
1810 alter_subreg (home);
1813 /* The kind-of-variable letter depends on where
1814 the variable is and on the scope of its name:
1815 G and N_GSYM for static storage and global scope,
1816 S for static storage and file scope,
1817 V for static storage and local scope,
1818 for those two, use N_LCSYM if data is in bss segment,
1819 N_STSYM if in data segment, N_FUN otherwise.
1820 (We used N_FUN originally, then changed to N_STSYM
1821 to please GDB. However, it seems that confused ld.
1822 Now GDB has been fixed to like N_FUN, says Kingdon.)
1823 no letter at all, and N_LSYM, for auto variable,
1824 r and N_RSYM for register variable. */
1826 if (GET_CODE (home) == MEM
1827 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1829 if (TREE_PUBLIC (decl))
1832 current_sym_code = N_GSYM;
1836 current_sym_addr = XEXP (home, 0);
1838 letter = decl_function_context (decl) ? 'V' : 'S';
1840 if (!DECL_INITIAL (decl))
1841 current_sym_code = N_LCSYM;
1842 else if (DECL_IN_TEXT_SECTION (decl))
1843 /* This is not quite right, but it's the closest
1844 of all the codes that Unix defines. */
1845 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
1848 /* Ultrix `as' seems to need this. */
1849 #ifdef DBX_STATIC_STAB_DATA_SECTION
1852 current_sym_code = N_STSYM;
1856 else if (regno >= 0)
1859 current_sym_code = N_RSYM;
1860 current_sym_value = DBX_REGISTER_NUMBER (regno);
1862 else if (GET_CODE (home) == MEM
1863 && (GET_CODE (XEXP (home, 0)) == MEM
1864 || (GET_CODE (XEXP (home, 0)) == REG
1865 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
1866 /* If the value is indirect by memory or by a register
1867 that isn't the frame pointer
1868 then it means the object is variable-sized and address through
1869 that register or stack slot. DBX has no way to represent this
1870 so all we can do is output the variable as a pointer.
1871 If it's not a parameter, ignore it.
1872 (VAR_DECLs like this can be made by integrate.c.) */
1874 if (GET_CODE (XEXP (home, 0)) == REG)
1877 current_sym_code = N_RSYM;
1878 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
1882 current_sym_code = N_LSYM;
1883 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
1884 We want the value of that CONST_INT. */
1886 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
1889 /* Effectively do build_pointer_type, but don't cache this type,
1890 since it might be temporary whereas the type it points to
1891 might have been saved for inlining. */
1892 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
1893 type = make_node (POINTER_TYPE);
1894 TREE_TYPE (type) = TREE_TYPE (decl);
1896 else if (GET_CODE (home) == MEM
1897 && GET_CODE (XEXP (home, 0)) == REG)
1899 current_sym_code = N_LSYM;
1900 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1902 else if (GET_CODE (home) == MEM
1903 && GET_CODE (XEXP (home, 0)) == PLUS
1904 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
1906 current_sym_code = N_LSYM;
1907 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
1908 We want the value of that CONST_INT. */
1909 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1911 else if (GET_CODE (home) == MEM
1912 && GET_CODE (XEXP (home, 0)) == CONST)
1914 /* Handle an obscure case which can arise when optimizing and
1915 when there are few available registers. (This is *always*
1916 the case for i386/i486 targets). The RTL looks like
1917 (MEM (CONST ...)) even though this variable is a local `auto'
1918 or a local `register' variable. In effect, what has happened
1919 is that the reload pass has seen that all assignments and
1920 references for one such a local variable can be replaced by
1921 equivalent assignments and references to some static storage
1922 variable, thereby avoiding the need for a register. In such
1923 cases we're forced to lie to debuggers and tell them that
1924 this variable was itself `static'. */
1925 current_sym_code = N_LCSYM;
1927 current_sym_addr = XEXP (XEXP (home, 0), 0);
1929 else if (GET_CODE (home) == CONCAT)
1931 tree subtype = TREE_TYPE (type);
1933 /* If the variable's storage is in two parts,
1934 output each as a separate stab with a modified name. */
1935 if (WORDS_BIG_ENDIAN)
1936 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
1938 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
1940 /* Cast avoids warning in old compilers. */
1941 current_sym_code = (STAB_CODE_TYPE) 0;
1942 current_sym_value = 0;
1943 current_sym_addr = 0;
1944 dbxout_prepare_symbol (decl);
1946 if (WORDS_BIG_ENDIAN)
1947 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
1949 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
1953 /* Address might be a MEM, when DECL is a variable-sized object.
1954 Or it might be const0_rtx, meaning previous passes
1955 want us to ignore this variable. */
1958 /* Ok, start a symtab entry and output the variable name. */
1961 #ifdef DBX_STATIC_BLOCK_START
1962 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
1965 dbxout_symbol_name (decl, suffix, letter);
1966 dbxout_type (type, 0, 0);
1967 dbxout_finish_symbol (decl);
1969 #ifdef DBX_STATIC_BLOCK_END
1970 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
1974 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
1975 Then output LETTER to indicate the kind of location the symbol has. */
1978 dbxout_symbol_name (decl, suffix, letter)
1983 /* One slight hitch: if this is a VAR_DECL which is a static
1984 class member, we must put out the mangled name instead of the
1988 /* Note also that static member (variable) names DO NOT begin
1989 with underscores in .stabs directives. */
1990 if (DECL_LANG_SPECIFIC (decl))
1991 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
1993 name = IDENTIFIER_POINTER (DECL_NAME (decl));
1996 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
1997 (suffix ? suffix : ""));
1999 if (letter) putc (letter, asmfile);
2003 dbxout_prepare_symbol (decl)
2007 char *filename = DECL_SOURCE_FILE (decl);
2009 dbxout_source_file (asmfile, filename);
2014 dbxout_finish_symbol (sym)
2017 #ifdef DBX_FINISH_SYMBOL
2018 DBX_FINISH_SYMBOL (sym);
2021 if (use_gnu_debug_info_extensions && sym != 0)
2022 line = DECL_SOURCE_LINE (sym);
2024 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2025 if (current_sym_addr)
2026 output_addr_const (asmfile, current_sym_addr);
2028 fprintf (asmfile, "%d", current_sym_value);
2029 putc ('\n', asmfile);
2033 /* Output definitions of all the decls in a chain. */
2041 dbxout_symbol (syms, 1);
2042 syms = TREE_CHAIN (syms);
2046 /* The following two functions output definitions of function parameters.
2047 Each parameter gets a definition locating it in the parameter list.
2048 Each parameter that is a register variable gets a second definition
2049 locating it in the register.
2051 Printing or argument lists in gdb uses the definitions that
2052 locate in the parameter list. But reference to the variable in
2053 expressions uses preferentially the definition as a register. */
2055 /* Output definitions, referring to storage in the parmlist,
2056 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2059 dbxout_parms (parms)
2062 for (; parms; parms = TREE_CHAIN (parms))
2063 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2065 dbxout_prepare_symbol (parms);
2067 /* Perform any necessary register eliminations on the parameter's rtl,
2068 so that the debugging output will be accurate. */
2069 DECL_INCOMING_RTL (parms)
2070 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2071 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2072 #ifdef LEAF_REG_REMAP
2075 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2076 leaf_renumber_regs_insn (DECL_RTL (parms));
2080 if (PARM_PASSED_IN_MEMORY (parms))
2082 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2084 /* ??? Here we assume that the parm address is indexed
2085 off the frame pointer or arg pointer.
2086 If that is not true, we produce meaningless results,
2087 but do not crash. */
2088 if (GET_CODE (addr) == PLUS
2089 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2090 current_sym_value = INTVAL (XEXP (addr, 1));
2092 current_sym_value = 0;
2094 current_sym_code = N_PSYM;
2095 current_sym_addr = 0;
2098 if (DECL_NAME (parms))
2100 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2102 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2103 IDENTIFIER_POINTER (DECL_NAME (parms)),
2104 DBX_MEMPARM_STABS_LETTER);
2108 current_sym_nchars = 8;
2109 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2110 DBX_MEMPARM_STABS_LETTER);
2113 if (GET_CODE (DECL_RTL (parms)) == REG
2114 && REGNO (DECL_RTL (parms)) >= 0
2115 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2116 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2119 int original_value = current_sym_value;
2121 /* This is the case where the parm is passed as an int or double
2122 and it is converted to a char, short or float and stored back
2123 in the parmlist. In this case, describe the parm
2124 with the variable's declared type, and adjust the address
2125 if the least significant bytes (which we are using) are not
2127 #if BYTES_BIG_ENDIAN
2128 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2129 current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2130 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2133 if (GET_CODE (DECL_RTL (parms)) == MEM
2134 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2135 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2136 && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value)
2137 dbxout_type (TREE_TYPE (parms), 0, 0);
2140 current_sym_value = original_value;
2141 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2144 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2145 dbxout_finish_symbol (parms);
2147 else if (GET_CODE (DECL_RTL (parms)) == REG)
2150 char regparm_letter;
2152 /* Parm passed in registers and lives in registers or nowhere. */
2154 current_sym_code = DBX_REGPARM_STABS_CODE;
2155 regparm_letter = DBX_REGPARM_STABS_LETTER;
2156 current_sym_addr = 0;
2158 /* If parm lives in a register, use that register;
2159 pretend the parm was passed there. It would be more consistent
2160 to describe the register where the parm was passed,
2161 but in practice that register usually holds something else.
2163 If we use DECL_RTL, then we must use the declared type of
2164 the variable, not the type that it arrived in. */
2165 if (REGNO (DECL_RTL (parms)) >= 0
2166 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2168 best_rtl = DECL_RTL (parms);
2169 parm_type = TREE_TYPE (parms);
2171 /* If the parm lives nowhere, use the register where it was
2172 passed. It is also better to use the declared type here. */
2175 best_rtl = DECL_INCOMING_RTL (parms);
2176 parm_type = TREE_TYPE (parms);
2178 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2181 if (DECL_NAME (parms))
2183 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2184 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2185 IDENTIFIER_POINTER (DECL_NAME (parms)),
2190 current_sym_nchars = 8;
2191 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2195 dbxout_type (parm_type, 0, 0);
2196 dbxout_finish_symbol (parms);
2198 else if (GET_CODE (DECL_RTL (parms)) == MEM
2199 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2200 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2201 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2202 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2203 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2207 /* Parm was passed via invisible reference.
2208 That is, its address was passed in a register.
2209 Output it as if it lived in that register.
2210 The debugger will know from the type
2211 that it was actually passed by invisible reference. */
2213 char regparm_letter;
2214 /* Parm passed in registers and lives in registers or nowhere. */
2216 current_sym_code = DBX_REGPARM_STABS_CODE;
2217 regparm_letter = DBX_REGPARM_STABS_LETTER;
2219 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2220 If it is an unallocated pseudo-reg, then use the register where
2221 it was passed instead. */
2222 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2223 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2224 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2226 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2228 current_sym_addr = 0;
2231 if (DECL_NAME (parms))
2233 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2235 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2236 IDENTIFIER_POINTER (DECL_NAME (parms)),
2237 DBX_REGPARM_STABS_LETTER);
2241 current_sym_nchars = 8;
2242 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2243 DBX_REGPARM_STABS_LETTER);
2246 dbxout_type (TREE_TYPE (parms), 0, 0);
2247 dbxout_finish_symbol (parms);
2249 else if (GET_CODE (DECL_RTL (parms)) == MEM
2250 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2251 /* ??? A constant address for a parm can happen
2252 when the reg it lives in is equiv to a constant in memory.
2253 Should make this not happen, after 2.4. */
2254 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2256 /* Parm was passed in registers but lives on the stack. */
2258 current_sym_code = N_PSYM;
2259 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2260 in which case we want the value of that CONST_INT,
2261 or (MEM (REG ...)) or (MEM (MEM ...)),
2262 in which case we use a value of zero. */
2263 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2264 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2265 current_sym_value = 0;
2267 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2268 current_sym_addr = 0;
2271 if (DECL_NAME (parms))
2273 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2275 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2276 IDENTIFIER_POINTER (DECL_NAME (parms)),
2277 DBX_MEMPARM_STABS_LETTER);
2281 current_sym_nchars = 8;
2282 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2283 DBX_MEMPARM_STABS_LETTER);
2287 = DEBUGGER_ARG_OFFSET (current_sym_value,
2288 XEXP (DECL_RTL (parms), 0));
2289 dbxout_type (TREE_TYPE (parms), 0, 0);
2290 dbxout_finish_symbol (parms);
2295 /* Output definitions for the places where parms live during the function,
2296 when different from where they were passed, when the parms were passed
2299 It is not useful to do this for parms passed in registers
2300 that live during the function in different registers, because it is
2301 impossible to look in the passed register for the passed value,
2302 so we use the within-the-function register to begin with.
2304 PARMS is a chain of PARM_DECL nodes. */
2307 dbxout_reg_parms (parms)
2310 for (; parms; parms = TREE_CHAIN (parms))
2311 if (DECL_NAME (parms))
2313 dbxout_prepare_symbol (parms);
2315 /* Report parms that live in registers during the function
2316 but were passed in memory. */
2317 if (GET_CODE (DECL_RTL (parms)) == REG
2318 && REGNO (DECL_RTL (parms)) >= 0
2319 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
2320 && PARM_PASSED_IN_MEMORY (parms))
2321 dbxout_symbol_location (parms, TREE_TYPE (parms),
2322 0, DECL_RTL (parms));
2323 else if (GET_CODE (DECL_RTL (parms)) == CONCAT
2324 && PARM_PASSED_IN_MEMORY (parms))
2325 dbxout_symbol_location (parms, TREE_TYPE (parms),
2326 0, DECL_RTL (parms));
2327 /* Report parms that live in memory but not where they were passed. */
2328 else if (GET_CODE (DECL_RTL (parms)) == MEM
2329 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2330 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2331 && PARM_PASSED_IN_MEMORY (parms)
2332 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2334 #if 0 /* ??? It is not clear yet what should replace this. */
2335 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
2336 /* A parm declared char is really passed as an int,
2337 so it occupies the least significant bytes.
2338 On a big-endian machine those are not the low-numbered ones. */
2339 #if BYTES_BIG_ENDIAN
2340 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2341 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2342 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2344 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
2346 dbxout_symbol_location (parms, TREE_TYPE (parms),
2347 0, DECL_RTL (parms));
2350 else if (GET_CODE (DECL_RTL (parms)) == MEM
2351 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2353 /* Parm was passed via invisible reference.
2354 That is, its address was passed in a register.
2355 Output it as if it lived in that register.
2356 The debugger will know from the type
2357 that it was actually passed by invisible reference. */
2359 current_sym_code = N_RSYM;
2361 /* DECL_RTL looks like (MEM (REG...). Get the register number. */
2362 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2363 current_sym_addr = 0;
2366 if (DECL_NAME (parms))
2368 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2370 fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP,
2371 IDENTIFIER_POINTER (DECL_NAME (parms)));
2375 current_sym_nchars = 8;
2376 fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP);
2379 dbxout_type (TREE_TYPE (parms), 0, 0);
2380 dbxout_finish_symbol (parms);
2386 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2387 output definitions of those names, in raw form */
2395 putc (',', asmfile);
2396 dbxout_type (TREE_VALUE (args), 0, 0);
2398 args = TREE_CHAIN (args);
2402 /* Given a chain of ..._TYPE nodes,
2403 find those which have typedef names and output those names.
2404 This is to ensure those types get output. */
2407 dbxout_types (types)
2408 register tree types;
2412 if (TYPE_NAME (types)
2413 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2414 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2415 dbxout_symbol (TYPE_NAME (types), 1);
2416 types = TREE_CHAIN (types);
2420 /* Output everything about a symbol block (a BLOCK node
2421 that represents a scope level),
2422 including recursive output of contained blocks.
2424 BLOCK is the BLOCK node.
2425 DEPTH is its depth within containing symbol blocks.
2426 ARGS is usually zero; but for the outermost block of the
2427 body of a function, it is a chain of PARM_DECLs for the function parameters.
2428 We output definitions of all the register parms
2429 as if they were local variables of that block.
2431 If -g1 was used, we count blocks just the same, but output nothing
2432 except for the outermost block.
2434 Actually, BLOCK may be several blocks chained together.
2435 We handle them all in sequence. */
2438 dbxout_block (block, depth, args)
2439 register tree block;
2447 /* Ignore blocks never expanded or otherwise marked as real. */
2448 if (TREE_USED (block))
2450 #ifndef DBX_LBRAC_FIRST
2451 /* In dbx format, the syms of a block come before the N_LBRAC. */
2452 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2453 dbxout_syms (BLOCK_VARS (block));
2455 dbxout_reg_parms (args);
2458 /* Now output an N_LBRAC symbol to represent the beginning of
2459 the block. Use the block's tree-walk order to generate
2460 the assembler symbols LBBn and LBEn
2461 that final will define around the code in this block. */
2462 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2465 blocknum = next_block_number++;
2466 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2468 if (BLOCK_HANDLER_BLOCK (block))
2470 /* A catch block. Must precede N_LBRAC. */
2471 tree decl = BLOCK_VARS (block);
2474 #ifdef DBX_OUTPUT_CATCH
2475 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2477 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2478 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2479 assemble_name (asmfile, buf);
2480 fprintf (asmfile, "\n");
2482 decl = TREE_CHAIN (decl);
2486 #ifdef DBX_OUTPUT_LBRAC
2487 DBX_OUTPUT_LBRAC (asmfile, buf);
2489 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2490 assemble_name (asmfile, buf);
2491 #if DBX_BLOCKS_FUNCTION_RELATIVE
2492 fputc ('-', asmfile);
2493 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2495 fprintf (asmfile, "\n");
2499 /* Count blocks the same way regardless of debug_info_level. */
2500 next_block_number++;
2502 #ifdef DBX_LBRAC_FIRST
2503 /* On some weird machines, the syms of a block
2504 come after the N_LBRAC. */
2505 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2506 dbxout_syms (BLOCK_VARS (block));
2508 dbxout_reg_parms (args);
2511 /* Output the subblocks. */
2512 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2514 /* Refer to the marker for the end of the block. */
2515 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2518 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2519 #ifdef DBX_OUTPUT_RBRAC
2520 DBX_OUTPUT_RBRAC (asmfile, buf);
2522 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2523 assemble_name (asmfile, buf);
2524 #if DBX_BLOCKS_FUNCTION_RELATIVE
2525 fputc ('-', asmfile);
2526 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2528 fprintf (asmfile, "\n");
2532 block = BLOCK_CHAIN (block);
2536 /* Output the information about a function and its arguments and result.
2537 Usually this follows the function's code,
2538 but on some systems, it comes before. */
2541 dbxout_really_begin_function (decl)
2544 dbxout_symbol (decl, 0);
2545 dbxout_parms (DECL_ARGUMENTS (decl));
2546 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2547 dbxout_symbol (DECL_RESULT (decl), 1);
2550 /* Called at beginning of output of function definition. */
2553 dbxout_begin_function (decl)
2556 #ifdef DBX_FUNCTION_FIRST
2557 dbxout_really_begin_function (decl);
2561 /* Output dbx data for a function definition.
2562 This includes a definition of the function name itself (a symbol),
2563 definitions of the parameters (locating them in the parameter list)
2564 and then output the block that makes up the function's body
2565 (including all the auto variables of the function). */
2568 dbxout_function (decl)
2571 #ifndef DBX_FUNCTION_FIRST
2572 dbxout_really_begin_function (decl);
2574 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2575 #ifdef DBX_OUTPUT_FUNCTION_END
2576 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2579 #endif /* DBX_DEBUGGING_INFO */