1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 /* Output dbx-format symbol table data.
24 This consists of many symbol table entries, each of them
25 a .stabs assembler pseudo-op with four operands:
26 a "name" which is really a description of one symbol and its type,
27 a "code", which is a symbol defined in stab.h whose name starts with N_,
28 an unused operand always 0,
29 and a "value" which is an address or an offset.
30 The name is enclosed in doublequote characters.
32 Each function, variable, typedef, and structure tag
33 has a symbol table entry to define it.
34 The beginning and end of each level of name scoping within
35 a function are also marked by special symbol table entries.
37 The "name" consists of the symbol name, a colon, a kind-of-symbol letter,
38 and a data type number. The data type number may be followed by
39 "=" and a type definition; normally this will happen the first time
40 the type number is mentioned. The type definition may refer to
41 other types by number, and those type numbers may be followed
42 by "=" and nested definitions.
44 This can make the "name" quite long.
45 When a name is more than 80 characters, we split the .stabs pseudo-op
46 into two .stabs pseudo-ops, both sharing the same "code" and "value".
47 The first one is marked as continued with a double-backslash at the
50 The kind-of-symbol letter distinguished function names from global
51 variables from file-scope variables from parameters from auto
52 variables in memory from typedef names from register variables.
55 The "code" is mostly redundant with the kind-of-symbol letter
56 that goes in the "name", but not entirely: for symbols located
57 in static storage, the "code" says which segment the address is in,
58 which controls how it is relocated.
60 The "value" for a symbol in static storage
61 is the core address of the symbol (actually, the assembler
62 label for the symbol). For a symbol located in a stack slot
63 it is the stack offset; for one in a register, the register number.
64 For a typedef symbol, it is zero.
66 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
67 output while in the text section.
69 For more on data type definitions, see `dbxout_type'. */
78 #include "insn-config.h"
80 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
87 #ifdef XCOFF_DEBUGGING_INFO
92 #define ASM_STABS_OP "\t.stabs\t"
96 #define ASM_STABN_OP "\t.stabn\t"
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 /* This is used for parameters passed by invisible reference in a register. */
116 #ifndef GDB_INV_REF_REGPARM_STABS_LETTER
117 #define GDB_INV_REF_REGPARM_STABS_LETTER 'a'
120 #ifndef DBX_MEMPARM_STABS_LETTER
121 #define DBX_MEMPARM_STABS_LETTER 'p'
124 #ifndef FILE_NAME_JOINER
125 #define FILE_NAME_JOINER "/"
128 /* GDB needs to know that the stabs were generated by GCC. We emit an
129 N_OPT stab at the beginning of the source file to indicate this.
130 The string is historical, and different on a very few targets. */
131 #ifndef STABS_GCC_MARKER
132 #define STABS_GCC_MARKER "gcc2_compiled."
135 /* Typical USG systems don't have stab.h, and they also have
136 no use for DBX-format debugging info. */
138 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
140 /* Nonzero if we have actually used any of the GDB extensions
141 to the debugging format. The idea is that we use them for the
142 first time only if there's a strong reason, but once we have done that,
143 we use them whenever convenient. */
145 static int have_used_extensions
= 0;
147 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
148 for the N_SO filename stabs label. */
150 static int source_label_number
= 1;
152 #ifdef DEBUG_SYMS_TEXT
153 #define FORCE_TEXT text_section ();
160 #define STAB_CODE_TYPE enum __stab_debug_code
162 /* 1 if PARM is passed to this function in memory. */
164 #define PARM_PASSED_IN_MEMORY(PARM) \
165 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
167 /* A C expression for the integer offset value of an automatic variable
168 (N_LSYM) having address X (an RTX). */
169 #ifndef DEBUGGER_AUTO_OFFSET
170 #define DEBUGGER_AUTO_OFFSET(X) \
171 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
174 /* A C expression for the integer offset value of an argument (N_PSYM)
175 having address X (an RTX). The nominal offset is OFFSET. */
176 #ifndef DEBUGGER_ARG_OFFSET
177 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
180 /* Stream for writing to assembler file. */
182 static FILE *asmfile
;
184 /* Last source file name mentioned in a NOTE insn. */
186 static const char *lastfile
;
188 /* Current working directory. */
190 static const char *cwd
;
192 enum typestatus
{TYPE_UNSEEN
, TYPE_XREF
, TYPE_DEFINED
};
194 /* Structure recording information about a C data type.
195 The status element says whether we have yet output
196 the definition of the type. TYPE_XREF says we have
197 output it as a cross-reference only.
198 The file_number and type_number elements are used if DBX_USE_BINCL
203 enum typestatus status
;
210 /* Vector recording information about C data types.
211 When we first notice a data type (a tree node),
212 we assign it a number using next_type_number.
213 That is its index in this vector. */
215 struct typeinfo
*typevec
;
217 /* Number of elements of space allocated in `typevec'. */
219 static int typevec_len
;
221 /* In dbx output, each type gets a unique number.
222 This is the number for the next type output.
223 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
225 static int next_type_number
;
229 /* When using N_BINCL in dbx output, each type number is actually a
230 pair of the file number and the type number within the file.
231 This is a stack of input files. */
235 struct dbx_file
*next
;
237 int next_type_number
;
240 /* This is the top of the stack. */
242 static struct dbx_file
*current_file
;
244 /* This is the next file number to use. */
246 static int next_file_number
;
248 #endif /* DBX_USE_BINCL */
250 /* These variables are for dbxout_symbol to communicate to
251 dbxout_finish_symbol.
252 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
253 current_sym_value and current_sym_addr are two ways to address the
254 value to store in the symtab entry.
255 current_sym_addr if nonzero represents the value as an rtx.
256 If that is zero, current_sym_value is used. This is used
257 when the value is an offset (such as for auto variables,
258 register variables and parms). */
260 static STAB_CODE_TYPE current_sym_code
;
261 static int current_sym_value
;
262 static rtx current_sym_addr
;
264 /* Number of chars of symbol-description generated so far for the
265 current symbol. Used by CHARS and CONTIN. */
267 static int current_sym_nchars
;
269 /* Report having output N chars of the current symbol-description. */
271 #define CHARS(N) (current_sym_nchars += (N))
273 /* Break the current symbol-description, generating a continuation,
274 if it has become long. */
276 #ifndef DBX_CONTIN_LENGTH
277 #define DBX_CONTIN_LENGTH 80
280 #if DBX_CONTIN_LENGTH > 0
282 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
284 #define CONTIN do { } while (0)
287 static void dbxout_init
PARAMS ((const char *));
288 static void dbxout_finish
PARAMS ((const char *));
289 static void dbxout_start_source_file
PARAMS ((unsigned, const char *));
290 static void dbxout_end_source_file
PARAMS ((unsigned));
291 static void dbxout_source_line
PARAMS ((unsigned int, const char *));
292 static void dbxout_source_file
PARAMS ((FILE *, const char *));
293 #if defined(ASM_OUTPUT_SECTION_NAME)
294 static void dbxout_function_end
PARAMS ((void));
296 static void dbxout_typedefs
PARAMS ((tree
));
297 static void dbxout_type_index
PARAMS ((tree
));
298 #if DBX_CONTIN_LENGTH > 0
299 static void dbxout_continue
PARAMS ((void));
301 static void dbxout_args
PARAMS ((tree
));
302 static void dbxout_type_fields
PARAMS ((tree
));
303 static void dbxout_type_method_1
PARAMS ((tree
, const char *));
304 static void dbxout_type_methods
PARAMS ((tree
));
305 static void dbxout_range_type
PARAMS ((tree
));
306 static void dbxout_type
PARAMS ((tree
, int));
307 static void print_int_cst_octal
PARAMS ((tree
));
308 static void print_octal
PARAMS ((unsigned HOST_WIDE_INT
, int));
309 static void print_wide_int
PARAMS ((HOST_WIDE_INT
));
310 static void dbxout_type_name
PARAMS ((tree
));
311 static int dbxout_symbol_location
PARAMS ((tree
, tree
, const char *, rtx
));
312 static void dbxout_symbol_name
PARAMS ((tree
, const char *, int));
313 static void dbxout_prepare_symbol
PARAMS ((tree
));
314 static void dbxout_finish_symbol
PARAMS ((tree
));
315 static void dbxout_block
PARAMS ((tree
, int, tree
));
316 static void dbxout_begin_function
PARAMS ((tree
));
317 static void dbxout_global_decl
PARAMS ((tree
));
319 /* The debug hooks structure. */
320 #if defined (DBX_DEBUGGING_INFO)
322 static void dbxout_begin_block
PARAMS ((unsigned, unsigned));
323 static void dbxout_end_block
PARAMS ((unsigned, unsigned));
324 static void dbxout_function_decl
PARAMS ((tree
));
326 struct gcc_debug_hooks dbx_debug_hooks
=
330 debug_nothing_int_charstar
,
331 debug_nothing_int_charstar
,
332 dbxout_start_source_file
,
333 dbxout_end_source_file
,
336 debug_true_tree
, /* ignore_block */
337 dbxout_source_line
, /* source_line */
338 dbxout_source_line
, /* begin_prologue: just output line info */
339 debug_nothing_int
, /* end_prologue */
340 debug_nothing_void
, /* end_epilogue */
341 #ifdef DBX_FUNCTION_FIRST
342 dbxout_begin_function
,
344 debug_nothing_tree
, /* begin_function */
346 debug_nothing_int
, /* end_function */
347 dbxout_function_decl
,
348 dbxout_global_decl
, /* global_decl */
349 debug_nothing_tree
, /* deferred_inline_function */
350 debug_nothing_tree
, /* outlining_inline_function */
351 debug_nothing_rtx
/* label */
353 #endif /* DBX_DEBUGGING_INFO */
355 #if defined (XCOFF_DEBUGGING_INFO)
356 struct gcc_debug_hooks xcoff_debug_hooks
=
360 debug_nothing_int_charstar
,
361 debug_nothing_int_charstar
,
362 dbxout_start_source_file
,
363 dbxout_end_source_file
,
364 xcoffout_begin_block
,
366 debug_true_tree
, /* ignore_block */
367 xcoffout_source_line
,
368 xcoffout_begin_prologue
, /* begin_prologue */
369 debug_nothing_int
, /* end_prologue */
370 xcoffout_end_epilogue
,
371 debug_nothing_tree
, /* begin_function */
372 xcoffout_end_function
,
373 debug_nothing_tree
, /* function_decl */
374 dbxout_global_decl
, /* global_decl */
375 debug_nothing_tree
, /* deferred_inline_function */
376 debug_nothing_tree
, /* outlining_inline_function */
377 debug_nothing_rtx
/* label */
379 #endif /* XCOFF_DEBUGGING_INFO */
381 #if defined(ASM_OUTPUT_SECTION_NAME)
383 dbxout_function_end ()
385 static int scope_labelno
= 0;
386 char lscope_label_name
[100];
387 /* Convert Ltext into the appropriate format for local labels in case
388 the system doesn't insert underscores in front of user generated
390 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name
, "Lscope", scope_labelno
);
391 ASM_OUTPUT_INTERNAL_LABEL (asmfile
, "Lscope", scope_labelno
);
394 /* By convention, GCC will mark the end of a function with an N_FUN
395 symbol and an empty string. */
396 fprintf (asmfile
, "%s\"\",%d,0,0,", ASM_STABS_OP
, N_FUN
);
397 assemble_name (asmfile
, lscope_label_name
);
399 assemble_name (asmfile
, XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0));
400 fprintf (asmfile
, "\n");
402 #endif /* ! NO_DBX_FUNCTION_END */
404 /* At the beginning of compilation, start writing the symbol table.
405 Initialize `typevec' and output the standard data types of C. */
408 dbxout_init (input_file_name
)
409 const char *input_file_name
;
411 char ltext_label_name
[100];
412 tree syms
= getdecls ();
414 asmfile
= asm_out_file
;
417 typevec
= (struct typeinfo
*) xcalloc (typevec_len
, sizeof typevec
[0]);
419 /* Convert Ltext into the appropriate format for local labels in case
420 the system doesn't insert underscores in front of user generated
422 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name
, "Ltext", 0);
424 /* Put the current working directory in an N_SO symbol. */
425 #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this,
426 but GDB always does. */
427 if (use_gnu_debug_info_extensions
)
430 if (!cwd
&& (cwd
= getpwd ()) && (!*cwd
|| cwd
[strlen (cwd
) - 1] != '/'))
431 cwd
= concat (cwd
, FILE_NAME_JOINER
, NULL
);
434 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
435 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile
, cwd
);
436 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
437 fprintf (asmfile
, "%s", ASM_STABS_OP
);
438 output_quoted_string (asmfile
, cwd
);
439 fprintf (asmfile
, ",%d,0,0,%s\n", N_SO
, <ext_label_name
[1]);
440 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
444 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
445 /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That
446 would give us an N_SOL, and we want an N_SO. */
447 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile
, input_file_name
);
448 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
449 /* We include outputting `Ltext:' here,
450 because that gives you a way to override it. */
451 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
452 fprintf (asmfile
, "%s", ASM_STABS_OP
);
453 output_quoted_string (asmfile
, input_file_name
);
454 fprintf (asmfile
, ",%d,0,0,%s\n",
455 N_SO
, <ext_label_name
[1]);
457 ASM_OUTPUT_INTERNAL_LABEL (asmfile
, "Ltext", 0);
458 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
460 #ifdef DBX_OUTPUT_GCC_MARKER
461 DBX_OUTPUT_GCC_MARKER (asmfile
);
463 /* Emit an N_OPT stab to indicate that this file was compiled by GCC. */
464 fprintf (asmfile
, "%s\"%s\",%d,0,0,0\n",
465 ASM_STABS_OP
, STABS_GCC_MARKER
, N_OPT
);
468 lastfile
= input_file_name
;
470 next_type_number
= 1;
473 current_file
= (struct dbx_file
*) xmalloc (sizeof *current_file
);
474 current_file
->next
= NULL
;
475 current_file
->file_number
= 0;
476 current_file
->next_type_number
= 1;
477 next_file_number
= 1;
480 /* Make sure that types `int' and `char' have numbers 1 and 2.
481 Definitions of other integer types will refer to those numbers.
482 (Actually it should no longer matter what their numbers are.
483 Also, if any types with tags have been defined, dbxout_symbol
484 will output them first, so the numbers won't be 1 and 2. That
485 happens in C++. So it's a good thing it should no longer matter). */
487 #ifdef DBX_OUTPUT_STANDARD_TYPES
488 DBX_OUTPUT_STANDARD_TYPES (syms
);
490 dbxout_symbol (TYPE_NAME (integer_type_node
), 0);
491 dbxout_symbol (TYPE_NAME (char_type_node
), 0);
494 /* Get all permanent types that have typedef names,
495 and output them all, except for those already output. */
497 dbxout_typedefs (syms
);
500 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
501 in the reverse order from that which is found in SYMS. */
504 dbxout_typedefs (syms
)
509 dbxout_typedefs (TREE_CHAIN (syms
));
510 if (TREE_CODE (syms
) == TYPE_DECL
)
512 tree type
= TREE_TYPE (syms
);
514 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
515 && COMPLETE_TYPE_P (type
)
516 && ! TREE_ASM_WRITTEN (TYPE_NAME (type
)))
517 dbxout_symbol (TYPE_NAME (type
), 0);
522 /* Change to reading from a new source file. Generate a N_BINCL stab. */
525 dbxout_start_source_file (line
, filename
)
526 unsigned int line ATTRIBUTE_UNUSED
;
527 const char *filename ATTRIBUTE_UNUSED
;
530 struct dbx_file
*n
= (struct dbx_file
*) xmalloc (sizeof *n
);
532 n
->next
= current_file
;
533 n
->file_number
= next_file_number
++;
534 n
->next_type_number
= 1;
536 fprintf (asmfile
, "%s", ASM_STABS_OP
);
537 output_quoted_string (asmfile
, filename
);
538 fprintf (asmfile
, ",%d,0,0,0\n", N_BINCL
);
542 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
545 dbxout_end_source_file (line
)
546 unsigned int line ATTRIBUTE_UNUSED
;
549 struct dbx_file
*next
;
551 fprintf (asmfile
, "%s%d,0,0,0\n", ASM_STABN_OP
, N_EINCL
);
552 next
= current_file
->next
;
558 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
561 dbxout_source_file (file
, filename
)
563 const char *filename
;
565 char ltext_label_name
[100];
567 if (filename
&& (lastfile
== 0 || strcmp (filename
, lastfile
)))
569 #ifdef DBX_OUTPUT_SOURCE_FILENAME
570 DBX_OUTPUT_SOURCE_FILENAME (file
, filename
);
572 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name
, "Ltext",
573 source_label_number
);
574 fprintf (file
, "%s", ASM_STABS_OP
);
575 output_quoted_string (file
, filename
);
576 fprintf (file
, ",%d,0,0,%s\n", N_SOL
, <ext_label_name
[1]);
577 if (current_function_decl
!= NULL_TREE
578 && DECL_SECTION_NAME (current_function_decl
) != NULL_TREE
)
579 ; /* Don't change section amid function. */
582 ASM_OUTPUT_INTERNAL_LABEL (file
, "Ltext", source_label_number
);
583 source_label_number
++;
589 /* Output a line number symbol entry for source file FILENAME and line
593 dbxout_source_line (lineno
, filename
)
595 const char *filename
;
597 dbxout_source_file (asmfile
, filename
);
599 #ifdef ASM_OUTPUT_SOURCE_LINE
600 ASM_OUTPUT_SOURCE_LINE (asmfile
, lineno
);
602 fprintf (asmfile
, "%s%d,0,%d\n", ASM_STABD_OP
, N_SLINE
, lineno
);
606 #if defined (DBX_DEBUGGING_INFO)
608 /* Describe the beginning of an internal block within a function. */
611 dbxout_begin_block (line
, n
)
612 unsigned int line ATTRIBUTE_UNUSED
;
615 ASM_OUTPUT_INTERNAL_LABEL (asmfile
, "LBB", n
);
618 /* Describe the end line-number of an internal block within a function. */
621 dbxout_end_block (line
, n
)
622 unsigned int line ATTRIBUTE_UNUSED
;
625 ASM_OUTPUT_INTERNAL_LABEL (asmfile
, "LBE", n
);
628 /* Debug information for a global DECL. Called from toplev.c after
629 compilation proper has finished. */
631 dbxout_global_decl (decl
)
634 if (TREE_CODE (decl
) == VAR_DECL
635 && ! DECL_EXTERNAL (decl
)
636 && DECL_RTL_SET_P (decl
)) /* Not necessary? */
637 dbxout_symbol (decl
, 0);
640 /* Output dbx data for a function definition.
641 This includes a definition of the function name itself (a symbol),
642 definitions of the parameters (locating them in the parameter list)
643 and then output the block that makes up the function's body
644 (including all the auto variables of the function). */
647 dbxout_function_decl (decl
)
650 #ifndef DBX_FUNCTION_FIRST
651 dbxout_begin_function (decl
);
653 dbxout_block (DECL_INITIAL (decl
), 0, DECL_ARGUMENTS (decl
));
654 #ifdef DBX_OUTPUT_FUNCTION_END
655 DBX_OUTPUT_FUNCTION_END (asmfile
, decl
);
657 #if defined(ASM_OUTPUT_SECTION_NAME)
658 if (use_gnu_debug_info_extensions
659 #if defined(NO_DBX_FUNCTION_END)
660 && ! NO_DBX_FUNCTION_END
663 dbxout_function_end ();
667 #endif /* DBX_DEBUGGING_INFO */
669 /* At the end of compilation, finish writing the symbol table.
670 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
674 dbxout_finish (filename
)
675 const char *filename ATTRIBUTE_UNUSED
;
677 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
678 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asmfile
, filename
);
679 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
682 /* Output the index of a type. */
685 dbxout_type_index (type
)
688 #ifndef DBX_USE_BINCL
689 fprintf (asmfile
, "%d", TYPE_SYMTAB_ADDRESS (type
));
692 struct typeinfo
*t
= &typevec
[TYPE_SYMTAB_ADDRESS (type
)];
693 fprintf (asmfile
, "(%d,%d)", t
->file_number
, t
->type_number
);
698 #if DBX_CONTIN_LENGTH > 0
699 /* Continue a symbol-description that gets too big.
700 End one symbol table entry with a double-backslash
701 and start a new one, eventually producing something like
702 .stabs "start......\\",code,0,value
703 .stabs "...rest",code,0,value */
708 #ifdef DBX_CONTIN_CHAR
709 fprintf (asmfile
, "%c", DBX_CONTIN_CHAR
);
711 fprintf (asmfile
, "\\\\");
713 dbxout_finish_symbol (NULL_TREE
);
714 fprintf (asmfile
, "%s\"", ASM_STABS_OP
);
715 current_sym_nchars
= 0;
717 #endif /* DBX_CONTIN_LENGTH > 0 */
719 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
720 This must be a separate function because anonymous unions require
724 dbxout_type_fields (type
)
729 /* Output the name, type, position (in bits), size (in bits) of each
730 field that we can support. */
731 for (tem
= TYPE_FIELDS (type
); tem
; tem
= TREE_CHAIN (tem
))
733 /* Omit here local type decls until we know how to support them. */
734 if (TREE_CODE (tem
) == TYPE_DECL
735 /* Omit fields whose position or size are variable or too large to
737 || (TREE_CODE (tem
) == FIELD_DECL
738 && (! host_integerp (bit_position (tem
), 0)
740 || ! host_integerp (DECL_SIZE (tem
), 1)))
741 /* Omit here the nameless fields that are used to skip bits. */
742 || DECL_IGNORED_P (tem
))
745 else if (TREE_CODE (tem
) != CONST_DECL
)
747 /* Continue the line if necessary,
748 but not before the first field. */
749 if (tem
!= TYPE_FIELDS (type
))
754 fprintf (asmfile
, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem
)));
755 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem
)));
759 fprintf (asmfile
, ":");
763 if (use_gnu_debug_info_extensions
764 && (TREE_PRIVATE (tem
) || TREE_PROTECTED (tem
)
765 || TREE_CODE (tem
) != FIELD_DECL
))
767 have_used_extensions
= 1;
769 putc ((TREE_PRIVATE (tem
) ? '0'
770 : TREE_PROTECTED (tem
) ? '1' : '2'),
775 dbxout_type ((TREE_CODE (tem
) == FIELD_DECL
776 && DECL_BIT_FIELD_TYPE (tem
))
777 ? DECL_BIT_FIELD_TYPE (tem
) : TREE_TYPE (tem
), 0);
779 if (TREE_CODE (tem
) == VAR_DECL
)
781 if (TREE_STATIC (tem
) && use_gnu_debug_info_extensions
)
783 tree name
= DECL_ASSEMBLER_NAME (tem
);
785 have_used_extensions
= 1;
786 fprintf (asmfile
, ":%s;", IDENTIFIER_POINTER (name
));
787 CHARS (IDENTIFIER_LENGTH (name
) + 2);
791 /* If TEM is non-static, GDB won't understand it. */
792 fprintf (asmfile
, ",0,0;");
799 print_wide_int (int_bit_position (tem
));
801 print_wide_int (tree_low_cst (DECL_SIZE (tem
), 1));
809 /* Subroutine of `dbxout_type_methods'. Output debug info about the
810 method described DECL. DEBUG_NAME is an encoding of the method's
811 type signature. ??? We may be able to do without DEBUG_NAME altogether
815 dbxout_type_method_1 (decl
, debug_name
)
817 const char *debug_name
;
821 if (TREE_CODE (TREE_TYPE (decl
)) == FUNCTION_TYPE
)
823 else /* it's a METHOD_TYPE. */
825 tree firstarg
= TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)));
826 /* A for normal functions.
827 B for `const' member functions.
828 C for `volatile' member functions.
829 D for `const volatile' member functions. */
830 if (TYPE_READONLY (TREE_TYPE (firstarg
)))
832 if (TYPE_VOLATILE (TREE_TYPE (firstarg
)))
835 if (DECL_VINDEX (decl
))
841 fprintf (asmfile
, ":%s;%c%c%c", debug_name
,
842 TREE_PRIVATE (decl
) ? '0'
843 : TREE_PROTECTED (decl
) ? '1' : '2', c1
, c2
);
844 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl
)) + 6
845 - (debug_name
- IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
))));
847 if (DECL_VINDEX (decl
) && host_integerp (DECL_VINDEX (decl
), 0))
849 print_wide_int (tree_low_cst (DECL_VINDEX (decl
), 0));
852 dbxout_type (DECL_CONTEXT (decl
), 0);
853 fprintf (asmfile
, ";");
858 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
862 dbxout_type_methods (type
)
865 /* C++: put out the method names and their parameter lists */
866 tree methods
= TYPE_METHODS (type
);
868 register tree fndecl
;
870 char formatted_type_identifier_length
[16];
871 register int type_identifier_length
;
873 if (methods
== NULL_TREE
)
876 type_encoding
= DECL_NAME (TYPE_NAME (type
));
879 /* C++: Template classes break some assumptions made by this code about
880 the class names, constructor names, and encodings for assembler
881 label names. For now, disable output of dbx info for them. */
883 const char *ptr
= IDENTIFIER_POINTER (type_encoding
);
884 /* This should use index. (mrs) */
885 while (*ptr
&& *ptr
!= '<') ptr
++;
896 type_identifier_length
= IDENTIFIER_LENGTH (type_encoding
);
898 sprintf (formatted_type_identifier_length
, "%d", type_identifier_length
);
900 if (TREE_CODE (methods
) != TREE_VEC
)
902 else if (TREE_VEC_ELT (methods
, 0) != NULL_TREE
)
903 fndecl
= TREE_VEC_ELT (methods
, 0);
905 fndecl
= TREE_VEC_ELT (methods
, 1);
911 /* Group together all the methods for the same operation.
912 These differ in the types of the arguments. */
913 for (last
= NULL_TREE
;
914 fndecl
&& (last
== NULL_TREE
|| DECL_NAME (fndecl
) == DECL_NAME (last
));
915 fndecl
= TREE_CHAIN (fndecl
))
916 /* Output the name of the field (after overloading), as
917 well as the name of the field before overloading, along
918 with its parameter list */
920 /* This is the "mangled" name of the method.
921 It encodes the argument types. */
922 const char *debug_name
;
924 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these
925 include TEMPLATE_DECLs.) The debugger doesn't know what
926 to do with such entities anyhow. */
927 if (TREE_CODE (fndecl
) != FUNCTION_DECL
)
930 debug_name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl
));
936 /* Also ignore abstract methods; those are only interesting to
937 the DWARF backends. */
938 if (DECL_IGNORED_P (fndecl
) || DECL_ABSTRACT (fndecl
))
941 /* Redundantly output the plain name, since that's what gdb
945 tree name
= DECL_NAME (fndecl
);
946 fprintf (asmfile
, "%s::", IDENTIFIER_POINTER (name
));
947 CHARS (IDENTIFIER_LENGTH (name
) + 2);
951 dbxout_type (TREE_TYPE (fndecl
), 0);
953 dbxout_type_method_1 (fndecl
, debug_name
);
963 /* Emit a "range" type specification, which has the form:
964 "r<index type>;<lower bound>;<upper bound>;".
965 TYPE is an INTEGER_TYPE. */
968 dbxout_range_type (type
)
971 fprintf (asmfile
, "r");
972 if (TREE_TYPE (type
))
973 dbxout_type (TREE_TYPE (type
), 0);
974 else if (TREE_CODE (type
) != INTEGER_TYPE
)
975 dbxout_type (type
, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
978 /* Traditionally, we made sure 'int' was type 1, and builtin types
979 were defined to be sub-ranges of int. Unfortunately, this
980 does not allow us to distinguish true sub-ranges from integer
981 types. So, instead we define integer (non-sub-range) types as
982 sub-ranges of themselves. This matters for Chill. If this isn't
983 a subrange type, then we want to define it in terms of itself.
984 However, in C, this may be an anonymous integer type, and we don't
985 want to emit debug info referring to it. Just calling
986 dbxout_type_index won't work anyways, because the type hasn't been
987 defined yet. We make this work for both cases by checked to see
988 whether this is a defined type, referring to it if it is, and using
990 if (TYPE_SYMTAB_ADDRESS (type
) != 0)
991 dbxout_type_index (type
);
993 dbxout_type_index (integer_type_node
);
996 if (TYPE_MIN_VALUE (type
) != 0
997 && host_integerp (TYPE_MIN_VALUE (type
), 0))
1001 print_wide_int (tree_low_cst (TYPE_MIN_VALUE (type
), 0));
1005 fprintf (asmfile
, ";0");
1009 if (TYPE_MAX_VALUE (type
) != 0
1010 && host_integerp (TYPE_MAX_VALUE (type
), 0))
1012 putc (';', asmfile
);
1014 print_wide_int (tree_low_cst (TYPE_MAX_VALUE (type
), 0));
1015 putc (';', asmfile
);
1020 fprintf (asmfile
, ";-1;");
1025 /* Output a reference to a type. If the type has not yet been
1026 described in the dbx output, output its definition now.
1027 For a type already defined, just refer to its definition
1028 using the type number.
1030 If FULL is nonzero, and the type has been described only with
1031 a forward-reference, output the definition now.
1032 If FULL is zero in this case, just refer to the forward-reference
1033 using the number previously allocated. */
1036 dbxout_type (type
, full
)
1041 static int anonymous_type_number
= 0;
1043 if (TREE_CODE (type
) == VECTOR_TYPE
)
1044 type
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
1046 /* If there was an input error and we don't really have a type,
1047 avoid crashing and write something that is at least valid
1048 by assuming `int'. */
1049 if (type
== error_mark_node
)
1050 type
= integer_type_node
;
1053 /* Try to find the "main variant" with the same name but not const
1054 or volatile. (Since stabs does not distinguish const and volatile,
1055 there is no need to make them separate types. But types with
1056 different names are usefully distinguished.) */
1058 for (tem
= TYPE_MAIN_VARIANT (type
); tem
; tem
= TYPE_NEXT_VARIANT (tem
))
1059 if (!TYPE_READONLY (tem
) && !TYPE_VOLATILE (tem
)
1060 && TYPE_NAME (tem
) == TYPE_NAME (type
))
1065 if (TYPE_NAME (type
)
1066 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1067 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type
)))
1071 if (TYPE_SYMTAB_ADDRESS (type
) == 0)
1073 /* Type has no dbx number assigned. Assign next available number. */
1074 TYPE_SYMTAB_ADDRESS (type
) = next_type_number
++;
1076 /* Make sure type vector is long enough to record about this type. */
1078 if (next_type_number
== typevec_len
)
1081 = (struct typeinfo
*) xrealloc (typevec
,
1082 typevec_len
* 2 * sizeof typevec
[0]);
1083 memset ((char *) (typevec
+ typevec_len
), 0,
1084 typevec_len
* sizeof typevec
[0]);
1088 #ifdef DBX_USE_BINCL
1089 typevec
[TYPE_SYMTAB_ADDRESS (type
)].file_number
1090 = current_file
->file_number
;
1091 typevec
[TYPE_SYMTAB_ADDRESS (type
)].type_number
1092 = current_file
->next_type_number
++;
1096 /* Output the number of this type, to refer to it. */
1097 dbxout_type_index (type
);
1099 #ifdef DBX_TYPE_DEFINED
1100 if (DBX_TYPE_DEFINED (type
))
1104 /* If this type's definition has been output or is now being output,
1107 switch (typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
)
1112 /* If we have already had a cross reference,
1113 and either that's all we want or that's the best we could do,
1114 don't repeat the cross reference.
1115 Sun dbx crashes if we do. */
1116 if (! full
|| !COMPLETE_TYPE_P (type
)
1117 /* No way in DBX fmt to describe a variable size. */
1118 || ! host_integerp (TYPE_SIZE (type
), 1))
1126 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1127 leave the type-number completely undefined rather than output
1128 a cross-reference. If we have already used GNU debug info extensions,
1129 then it is OK to output a cross reference. This is necessary to get
1130 proper C++ debug output. */
1131 if ((TREE_CODE (type
) == RECORD_TYPE
|| TREE_CODE (type
) == UNION_TYPE
1132 || TREE_CODE (type
) == QUAL_UNION_TYPE
1133 || TREE_CODE (type
) == ENUMERAL_TYPE
)
1134 && ! use_gnu_debug_info_extensions
)
1135 /* We must use the same test here as we use twice below when deciding
1136 whether to emit a cross-reference. */
1137 if ((TYPE_NAME (type
) != 0
1138 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1139 && DECL_IGNORED_P (TYPE_NAME (type
)))
1141 || !COMPLETE_TYPE_P (type
)
1142 /* No way in DBX fmt to describe a variable size. */
1143 || ! host_integerp (TYPE_SIZE (type
), 1))
1145 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
1150 /* Output a definition now. */
1152 fprintf (asmfile
, "=");
1155 /* Mark it as defined, so that if it is self-referent
1156 we will not get into an infinite recursion of definitions. */
1158 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_DEFINED
;
1160 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1161 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
1163 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)), 0);
1167 switch (TREE_CODE (type
))
1171 /* For a void type, just define it as itself; ie, "5=5".
1172 This makes us consider it defined
1173 without saying what it is. The debugger will make it
1174 a void type when the reference is seen, and nothing will
1175 ever override that default. */
1176 dbxout_type_index (type
);
1180 if (type
== char_type_node
&& ! TREE_UNSIGNED (type
))
1182 /* Output the type `char' as a subrange of itself!
1183 I don't understand this definition, just copied it
1184 from the output of pcc.
1185 This used to use `r2' explicitly and we used to
1186 take care to make sure that `char' was type number 2. */
1187 fprintf (asmfile
, "r");
1189 dbxout_type_index (type
);
1190 fprintf (asmfile
, ";0;127;");
1194 /* If this is a subtype of another integer type, always prefer to
1195 write it as a subtype. */
1196 else if (TREE_TYPE (type
) != 0
1197 && TREE_CODE (TREE_TYPE (type
)) == INTEGER_TYPE
)
1198 dbxout_range_type (type
);
1202 /* If the size is non-standard, say what it is if we can use
1205 if (use_gnu_debug_info_extensions
1206 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1208 have_used_extensions
= 1;
1209 fprintf (asmfile
, "@s%d;", TYPE_PRECISION (type
));
1213 /* If we can use GDB extensions and the size is wider than a
1214 long (the size used by GDB to read them) or we may have
1215 trouble writing the bounds the usual way, write them in
1216 octal. Note the test is for the *target's* size of "long",
1217 not that of the host. The host test is just to make sure we
1218 can write it out in case the host wide int is narrower than the
1221 /* For unsigned types, we use octal if they are the same size or
1222 larger. This is because we print the bounds as signed decimal,
1223 and hence they can't span same size unsigned types. */
1225 if (use_gnu_debug_info_extensions
1226 && TYPE_MIN_VALUE (type
) != 0
1227 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
1228 && TYPE_MAX_VALUE (type
) != 0
1229 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
1230 && (TYPE_PRECISION (type
) > TYPE_PRECISION (integer_type_node
)
1231 || ((TYPE_PRECISION (type
)
1232 == TYPE_PRECISION (integer_type_node
))
1233 && TREE_UNSIGNED (type
))
1234 || TYPE_PRECISION (type
) > HOST_BITS_PER_WIDE_INT
1235 || (TYPE_PRECISION (type
) == HOST_BITS_PER_WIDE_INT
1236 && TREE_UNSIGNED (type
))))
1238 fprintf (asmfile
, "r");
1240 dbxout_type_index (type
);
1241 fprintf (asmfile
, ";");
1243 print_int_cst_octal (TYPE_MIN_VALUE (type
));
1244 fprintf (asmfile
, ";");
1246 print_int_cst_octal (TYPE_MAX_VALUE (type
));
1247 fprintf (asmfile
, ";");
1252 /* Output other integer types as subranges of `int'. */
1253 dbxout_range_type (type
);
1259 /* This used to say `r1' and we used to take care
1260 to make sure that `int' was type number 1. */
1261 fprintf (asmfile
, "r");
1263 dbxout_type_index (integer_type_node
);
1264 putc (';', asmfile
);
1266 print_wide_int (int_size_in_bytes (type
));
1267 fputs (";0;", asmfile
);
1272 if (use_gnu_debug_info_extensions
)
1274 have_used_extensions
= 1;
1275 fputs ("@s", asmfile
);
1277 print_wide_int (BITS_PER_UNIT
* int_size_in_bytes (type
));
1278 fputs (";-20;", asmfile
);
1283 /* Output the type `char' as a subrange of itself.
1284 That is what pcc seems to do. */
1285 fprintf (asmfile
, "r");
1287 dbxout_type_index (char_type_node
);
1288 fprintf (asmfile
, ";0;%d;", TREE_UNSIGNED (type
) ? 255 : 127);
1294 if (use_gnu_debug_info_extensions
)
1296 have_used_extensions
= 1;
1297 fputs ("@s", asmfile
);
1299 print_wide_int (BITS_PER_UNIT
* int_size_in_bytes (type
));
1300 fputs (";-16;", asmfile
);
1303 else /* Define as enumeral type (False, True) */
1305 fprintf (asmfile
, "eFalse:0,True:1,;");
1311 putc ('d', asmfile
);
1313 dbxout_type (TREE_TYPE (type
), 0);
1317 /* Differs from the REAL_TYPE by its new data type number */
1319 if (TREE_CODE (TREE_TYPE (type
)) == REAL_TYPE
)
1321 fprintf (asmfile
, "r");
1323 dbxout_type_index (type
);
1324 putc (';', asmfile
);
1326 print_wide_int (2 * int_size_in_bytes (TREE_TYPE (type
)));
1327 fputs (";0;", asmfile
);
1332 /* Output a complex integer type as a structure,
1333 pending some other way to do it. */
1334 putc ('s', asmfile
);
1336 print_wide_int (int_size_in_bytes (type
));
1337 fprintf (asmfile
, "real:");
1340 dbxout_type (TREE_TYPE (type
), 0);
1341 fprintf (asmfile
, ",0,%d;", TYPE_PRECISION (TREE_TYPE (type
)));
1343 fprintf (asmfile
, "imag:");
1345 dbxout_type (TREE_TYPE (type
), 0);
1346 fprintf (asmfile
, ",%d,%d;;", TYPE_PRECISION (TREE_TYPE (type
)),
1347 TYPE_PRECISION (TREE_TYPE (type
)));
1353 if (use_gnu_debug_info_extensions
)
1355 have_used_extensions
= 1;
1356 fputs ("@s", asmfile
);
1358 print_wide_int (BITS_PER_UNIT
* int_size_in_bytes (type
));
1359 putc (';', asmfile
);
1362 /* Check if a bitstring type, which in Chill is
1363 different from a [power]set. */
1364 if (TYPE_STRING_FLAG (type
))
1366 fprintf (asmfile
, "@S;");
1370 putc ('S', asmfile
);
1372 dbxout_type (TYPE_DOMAIN (type
), 0);
1376 /* Make arrays of packed bits look like bitstrings for chill. */
1377 if (TYPE_PACKED (type
) && use_gnu_debug_info_extensions
)
1379 have_used_extensions
= 1;
1380 fputs ("@s", asmfile
);
1382 print_wide_int (BITS_PER_UNIT
* int_size_in_bytes (type
));
1383 fprintf (asmfile
, ";@S;S");
1385 dbxout_type (TYPE_DOMAIN (type
), 0);
1389 /* Output "a" followed by a range type definition
1390 for the index type of the array
1391 followed by a reference to the target-type.
1392 ar1;0;N;M for a C array of type M and size N+1. */
1393 /* Check if a character string type, which in Chill is
1394 different from an array of characters. */
1395 if (TYPE_STRING_FLAG (type
) && use_gnu_debug_info_extensions
)
1397 have_used_extensions
= 1;
1398 fprintf (asmfile
, "@S;");
1401 tem
= TYPE_DOMAIN (type
);
1404 fprintf (asmfile
, "ar");
1406 dbxout_type_index (integer_type_node
);
1407 fprintf (asmfile
, ";0;-1;");
1412 fprintf (asmfile
, "a");
1414 dbxout_range_type (tem
);
1417 dbxout_type (TREE_TYPE (type
), 0);
1422 case QUAL_UNION_TYPE
:
1424 int i
, n_baseclasses
= 0;
1426 if (TYPE_BINFO (type
) != 0
1427 && TREE_CODE (TYPE_BINFO (type
)) == TREE_VEC
1428 && TYPE_BINFO_BASETYPES (type
) != 0)
1429 n_baseclasses
= TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type
));
1431 /* Output a structure type. We must use the same test here as we
1432 use in the DBX_NO_XREFS case above. */
1433 if ((TYPE_NAME (type
) != 0
1434 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1435 && DECL_IGNORED_P (TYPE_NAME (type
)))
1437 || !COMPLETE_TYPE_P (type
)
1438 /* No way in DBX fmt to describe a variable size. */
1439 || ! host_integerp (TYPE_SIZE (type
), 1))
1441 /* If the type is just a cross reference, output one
1442 and mark the type as partially described.
1443 If it later becomes defined, we will output
1444 its real definition.
1445 If the type has a name, don't nest its definition within
1446 another type's definition; instead, output an xref
1447 and let the definition come when the name is defined. */
1448 fputs ((TREE_CODE (type
) == RECORD_TYPE
) ? "xs" : "xu", asmfile
);
1450 #if 0 /* This assertion is legitimately false in C++. */
1451 /* We shouldn't be outputting a reference to a type before its
1452 definition unless the type has a tag name.
1453 A typedef name without a tag name should be impossible. */
1454 if (TREE_CODE (TYPE_NAME (type
)) != IDENTIFIER_NODE
)
1457 if (TYPE_NAME (type
) != 0)
1458 dbxout_type_name (type
);
1461 fprintf (asmfile
, "$$%d", anonymous_type_number
++);
1465 fprintf (asmfile
, ":");
1467 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
1471 /* Identify record or union, and print its size. */
1472 putc (((TREE_CODE (type
) == RECORD_TYPE
) ? 's' : 'u'), asmfile
);
1474 print_wide_int (int_size_in_bytes (type
));
1476 if (use_gnu_debug_info_extensions
)
1480 have_used_extensions
= 1;
1481 fprintf (asmfile
, "!%d,", n_baseclasses
);
1485 for (i
= 0; i
< n_baseclasses
; i
++)
1487 tree child
= TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type
)), i
);
1489 if (use_gnu_debug_info_extensions
)
1491 have_used_extensions
= 1;
1492 putc (TREE_VIA_VIRTUAL (child
) ? '1' : '0', asmfile
);
1493 putc (TREE_VIA_PUBLIC (child
) ? '2' : '0', asmfile
);
1495 print_wide_int (tree_low_cst (BINFO_OFFSET (child
), 0)
1497 putc (',', asmfile
);
1499 dbxout_type (BINFO_TYPE (child
), 0);
1500 putc (';', asmfile
);
1505 /* Print out the base class information with fields
1506 which have the same names at the types they hold. */
1507 dbxout_type_name (BINFO_TYPE (child
));
1508 putc (':', asmfile
);
1510 dbxout_type (BINFO_TYPE (child
), full
);
1511 putc (',', asmfile
);
1513 print_wide_int (tree_low_cst (BINFO_OFFSET (child
), 0)
1515 putc (',', asmfile
);
1517 print_wide_int (tree_low_cst (DECL_SIZE
1519 (BINFO_TYPE (child
))),
1522 putc (';', asmfile
);
1528 /* Write out the field declarations. */
1529 dbxout_type_fields (type
);
1530 if (use_gnu_debug_info_extensions
&& TYPE_METHODS (type
) != NULL_TREE
)
1532 have_used_extensions
= 1;
1533 dbxout_type_methods (type
);
1536 putc (';', asmfile
);
1539 if (use_gnu_debug_info_extensions
&& TREE_CODE (type
) == RECORD_TYPE
1540 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1541 && TYPE_VFIELD (type
))
1543 have_used_extensions
= 1;
1545 /* Tell GDB+ that it may keep reading. */
1546 putc ('~', asmfile
);
1549 /* We need to write out info about what field this class
1550 uses as its "main" vtable pointer field, because if this
1551 field is inherited from a base class, GDB cannot necessarily
1552 figure out which field it's using in time. */
1553 if (TYPE_VFIELD (type
))
1555 putc ('%', asmfile
);
1557 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type
)), 0);
1560 putc (';', asmfile
);
1566 /* We must use the same test here as we use in the DBX_NO_XREFS case
1567 above. We simplify it a bit since an enum will never have a variable
1569 if ((TYPE_NAME (type
) != 0
1570 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1571 && DECL_IGNORED_P (TYPE_NAME (type
)))
1573 || !COMPLETE_TYPE_P (type
))
1575 fprintf (asmfile
, "xe");
1577 dbxout_type_name (type
);
1578 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
1579 putc (':', asmfile
);
1583 #ifdef DBX_OUTPUT_ENUM
1584 DBX_OUTPUT_ENUM (asmfile
, type
);
1586 if (use_gnu_debug_info_extensions
1587 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1589 fprintf (asmfile
, "@s%d;", TYPE_PRECISION (type
));
1593 putc ('e', asmfile
);
1595 for (tem
= TYPE_VALUES (type
); tem
; tem
= TREE_CHAIN (tem
))
1597 fprintf (asmfile
, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem
)));
1598 CHARS (IDENTIFIER_LENGTH (TREE_PURPOSE (tem
)) + 1);
1599 if (TREE_INT_CST_HIGH (TREE_VALUE (tem
)) == 0)
1600 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem
)));
1601 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem
)) == -1
1602 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (TREE_VALUE (tem
)) < 0)
1603 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem
)));
1605 print_int_cst_octal (TREE_VALUE (tem
));
1607 putc (',', asmfile
);
1609 if (TREE_CHAIN (tem
) != 0)
1613 putc (';', asmfile
);
1619 putc ('*', asmfile
);
1621 dbxout_type (TREE_TYPE (type
), 0);
1625 if (use_gnu_debug_info_extensions
)
1627 have_used_extensions
= 1;
1628 putc ('#', asmfile
);
1631 /* Write the argument types out longhand. */
1632 dbxout_type (TYPE_METHOD_BASETYPE (type
), 0);
1633 putc (',', asmfile
);
1635 dbxout_type (TREE_TYPE (type
), 0);
1636 dbxout_args (TYPE_ARG_TYPES (type
));
1637 putc (';', asmfile
);
1641 /* Treat it as a function type. */
1642 dbxout_type (TREE_TYPE (type
), 0);
1646 if (use_gnu_debug_info_extensions
)
1648 have_used_extensions
= 1;
1649 putc ('@', asmfile
);
1651 dbxout_type (TYPE_OFFSET_BASETYPE (type
), 0);
1652 putc (',', asmfile
);
1654 dbxout_type (TREE_TYPE (type
), 0);
1657 /* Should print as an int, because it is really just an offset. */
1658 dbxout_type (integer_type_node
, 0);
1661 case REFERENCE_TYPE
:
1662 if (use_gnu_debug_info_extensions
)
1663 have_used_extensions
= 1;
1664 putc (use_gnu_debug_info_extensions
? '&' : '*', asmfile
);
1666 dbxout_type (TREE_TYPE (type
), 0);
1670 putc ('f', asmfile
);
1672 dbxout_type (TREE_TYPE (type
), 0);
1680 /* Print the value of integer constant C, in octal,
1681 handling double precision. */
1684 print_int_cst_octal (c
)
1687 unsigned HOST_WIDE_INT high
= TREE_INT_CST_HIGH (c
);
1688 unsigned HOST_WIDE_INT low
= TREE_INT_CST_LOW (c
);
1689 int excess
= (3 - (HOST_BITS_PER_WIDE_INT
% 3));
1690 unsigned int width
= TYPE_PRECISION (TREE_TYPE (c
));
1692 /* GDB wants constants with no extra leading "1" bits, so
1693 we need to remove any sign-extension that might be
1695 if (width
== HOST_BITS_PER_WIDE_INT
* 2)
1697 else if (width
> HOST_BITS_PER_WIDE_INT
)
1698 high
&= (((HOST_WIDE_INT
) 1 << (width
- HOST_BITS_PER_WIDE_INT
)) - 1);
1699 else if (width
== HOST_BITS_PER_WIDE_INT
)
1702 high
= 0, low
&= (((HOST_WIDE_INT
) 1 << width
) - 1);
1704 fprintf (asmfile
, "0");
1709 print_octal (high
, HOST_BITS_PER_WIDE_INT
/ 3);
1710 print_octal (low
, HOST_BITS_PER_WIDE_INT
/ 3);
1714 unsigned HOST_WIDE_INT beg
= high
>> excess
;
1715 unsigned HOST_WIDE_INT middle
1716 = ((high
& (((HOST_WIDE_INT
) 1 << excess
) - 1)) << (3 - excess
)
1717 | (low
>> (HOST_BITS_PER_WIDE_INT
/ 3 * 3)));
1718 unsigned HOST_WIDE_INT end
1719 = low
& (((unsigned HOST_WIDE_INT
) 1
1720 << (HOST_BITS_PER_WIDE_INT
/ 3 * 3))
1723 fprintf (asmfile
, "%o%01o", (int) beg
, (int) middle
);
1725 print_octal (end
, HOST_BITS_PER_WIDE_INT
/ 3);
1730 print_octal (value
, digits
)
1731 unsigned HOST_WIDE_INT value
;
1736 for (i
= digits
- 1; i
>= 0; i
--)
1737 fprintf (asmfile
, "%01o", (int) ((value
>> (3 * i
)) & 7));
1742 /* Output C in decimal while adjusting the number of digits written. */
1750 fprintf (asmfile
, HOST_WIDE_INT_PRINT_DEC
, c
);
1761 /* Output the name of type TYPE, with no punctuation.
1762 Such names can be set up either by typedef declarations
1763 or by struct, enum and union tags. */
1766 dbxout_type_name (type
)
1770 if (TYPE_NAME (type
) == 0)
1772 if (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
)
1774 t
= TYPE_NAME (type
);
1776 else if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
)
1778 t
= DECL_NAME (TYPE_NAME (type
));
1783 fprintf (asmfile
, "%s", IDENTIFIER_POINTER (t
));
1784 CHARS (IDENTIFIER_LENGTH (t
));
1787 /* Output a .stabs for the symbol defined by DECL,
1788 which must be a ..._DECL node in the normal namespace.
1789 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1790 LOCAL is nonzero if the scope is less than the entire file.
1791 Return 1 if a stabs might have been emitted. */
1794 dbxout_symbol (decl
, local
)
1796 int local ATTRIBUTE_UNUSED
;
1798 tree type
= TREE_TYPE (decl
);
1799 tree context
= NULL_TREE
;
1802 /* Cast avoids warning in old compilers. */
1803 current_sym_code
= (STAB_CODE_TYPE
) 0;
1804 current_sym_value
= 0;
1805 current_sym_addr
= 0;
1807 /* Ignore nameless syms, but don't ignore type tags. */
1809 if ((DECL_NAME (decl
) == 0 && TREE_CODE (decl
) != TYPE_DECL
)
1810 || DECL_IGNORED_P (decl
))
1813 dbxout_prepare_symbol (decl
);
1815 /* The output will always start with the symbol name,
1816 so always count that in the length-output-so-far. */
1818 if (DECL_NAME (decl
) != 0)
1819 current_sym_nchars
= 2 + IDENTIFIER_LENGTH (DECL_NAME (decl
));
1821 switch (TREE_CODE (decl
))
1824 /* Enum values are defined by defining the enum type. */
1828 if (DECL_RTL (decl
) == 0)
1830 if (DECL_EXTERNAL (decl
))
1832 /* Don't mention a nested function under its parent. */
1833 context
= decl_function_context (decl
);
1834 if (context
== current_function_decl
)
1836 if (GET_CODE (DECL_RTL (decl
)) != MEM
1837 || GET_CODE (XEXP (DECL_RTL (decl
), 0)) != SYMBOL_REF
)
1841 fprintf (asmfile
, "%s\"%s:%c", ASM_STABS_OP
,
1842 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
1843 TREE_PUBLIC (decl
) ? 'F' : 'f');
1846 current_sym_code
= N_FUN
;
1847 current_sym_addr
= XEXP (DECL_RTL (decl
), 0);
1849 if (TREE_TYPE (type
))
1850 dbxout_type (TREE_TYPE (type
), 0);
1852 dbxout_type (void_type_node
, 0);
1854 /* For a nested function, when that function is compiled,
1855 mention the containing function name
1856 as well as (since dbx wants it) our own assembler-name. */
1858 fprintf (asmfile
, ",%s,%s",
1859 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
1860 IDENTIFIER_POINTER (DECL_NAME (context
)));
1862 dbxout_finish_symbol (decl
);
1867 /* This seems all wrong. Outputting most kinds of types gives no name
1868 at all. A true definition gives no name; a cross-ref for a
1869 structure can give the tag name, but not a type name.
1870 It seems that no typedef name is defined by outputting a type. */
1872 /* If this typedef name was defined by outputting the type,
1873 don't duplicate it. */
1874 if (typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
== TYPE_DEFINED
1875 && TYPE_NAME (TREE_TYPE (decl
)) == decl
)
1878 /* Don't output the same typedef twice.
1879 And don't output what language-specific stuff doesn't want output. */
1880 if (TREE_ASM_WRITTEN (decl
) || TYPE_DECL_SUPPRESS_DEBUG (decl
))
1889 if (DECL_NAME (decl
))
1891 /* Nonzero means we must output a tag as well as a typedef. */
1894 /* Handle the case of a C++ structure or union
1895 where the TYPE_NAME is a TYPE_DECL
1896 which gives both a typedef name and a tag. */
1897 /* dbx requires the tag first and the typedef second. */
1898 if ((TREE_CODE (type
) == RECORD_TYPE
1899 || TREE_CODE (type
) == UNION_TYPE
1900 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
1901 && TYPE_NAME (type
) == decl
1902 && !(use_gnu_debug_info_extensions
&& have_used_extensions
)
1903 && !TREE_ASM_WRITTEN (TYPE_NAME (type
))
1904 /* Distinguish the implicit typedefs of C++
1905 from explicit ones that might be found in C. */
1906 && DECL_ARTIFICIAL (decl
)
1907 /* Do not generate a tag for records of variable size,
1908 since this type can not be properly described in the
1909 DBX format, and it confuses some tools such as objdump. */
1910 && host_integerp (TYPE_SIZE (type
), 1))
1912 tree name
= TYPE_NAME (type
);
1913 if (TREE_CODE (name
) == TYPE_DECL
)
1914 name
= DECL_NAME (name
);
1916 current_sym_code
= DBX_TYPE_DECL_STABS_CODE
;
1917 current_sym_value
= 0;
1918 current_sym_addr
= 0;
1919 current_sym_nchars
= 2 + IDENTIFIER_LENGTH (name
);
1921 fprintf (asmfile
, "%s\"%s:T", ASM_STABS_OP
,
1922 IDENTIFIER_POINTER (name
));
1923 dbxout_type (type
, 1);
1924 dbxout_finish_symbol (NULL_TREE
);
1927 /* Output typedef name. */
1928 fprintf (asmfile
, "%s\"%s:", ASM_STABS_OP
,
1929 IDENTIFIER_POINTER (DECL_NAME (decl
)));
1931 /* Short cut way to output a tag also. */
1932 if ((TREE_CODE (type
) == RECORD_TYPE
1933 || TREE_CODE (type
) == UNION_TYPE
1934 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
1935 && TYPE_NAME (type
) == decl
1936 /* Distinguish the implicit typedefs of C++
1937 from explicit ones that might be found in C. */
1938 && DECL_ARTIFICIAL (decl
))
1940 if (use_gnu_debug_info_extensions
&& have_used_extensions
)
1942 putc ('T', asmfile
);
1943 TREE_ASM_WRITTEN (TYPE_NAME (type
)) = 1;
1945 #if 0 /* Now we generate the tag for this case up above. */
1951 putc ('t', asmfile
);
1952 current_sym_code
= DBX_TYPE_DECL_STABS_CODE
;
1954 dbxout_type (type
, 1);
1955 dbxout_finish_symbol (decl
);
1959 /* Don't output a tag if this is an incomplete type. This prevents
1960 the sun4 Sun OS 4.x dbx from crashing. */
1962 if (tag_needed
&& TYPE_NAME (type
) != 0
1963 && (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
1964 || (DECL_NAME (TYPE_NAME (type
)) != 0))
1965 && COMPLETE_TYPE_P (type
)
1966 && !TREE_ASM_WRITTEN (TYPE_NAME (type
)))
1968 /* For a TYPE_DECL with no name, but the type has a name,
1970 This is what represents `struct foo' with no typedef. */
1971 /* In C++, the name of a type is the corresponding typedef.
1972 In C, it is an IDENTIFIER_NODE. */
1973 tree name
= TYPE_NAME (type
);
1974 if (TREE_CODE (name
) == TYPE_DECL
)
1975 name
= DECL_NAME (name
);
1977 current_sym_code
= DBX_TYPE_DECL_STABS_CODE
;
1978 current_sym_value
= 0;
1979 current_sym_addr
= 0;
1980 current_sym_nchars
= 2 + IDENTIFIER_LENGTH (name
);
1982 fprintf (asmfile
, "%s\"%s:T", ASM_STABS_OP
,
1983 IDENTIFIER_POINTER (name
));
1984 dbxout_type (type
, 1);
1985 dbxout_finish_symbol (NULL_TREE
);
1989 /* If an enum type has no name, it cannot be referred to,
1990 but we must output it anyway, since the enumeration constants
1991 can be referred to. */
1992 if (!did_output
&& TREE_CODE (type
) == ENUMERAL_TYPE
)
1994 current_sym_code
= DBX_TYPE_DECL_STABS_CODE
;
1995 current_sym_value
= 0;
1996 current_sym_addr
= 0;
1997 current_sym_nchars
= 2;
1999 /* Some debuggers fail when given NULL names, so give this a
2000 harmless name of ` '. */
2001 fprintf (asmfile
, "%s\" :T", ASM_STABS_OP
);
2002 dbxout_type (type
, 1);
2003 dbxout_finish_symbol (NULL_TREE
);
2006 /* Prevent duplicate output of a typedef. */
2007 TREE_ASM_WRITTEN (decl
) = 1;
2012 /* Parm decls go in their own separate chains
2013 and are output by dbxout_reg_parms and dbxout_parms. */
2017 /* Named return value, treat like a VAR_DECL. */
2019 if (! DECL_RTL_SET_P (decl
))
2021 /* Don't mention a variable that is external.
2022 Let the file that defines it describe it. */
2023 if (DECL_EXTERNAL (decl
))
2026 /* If the variable is really a constant
2027 and not written in memory, inform the debugger. */
2028 if (TREE_STATIC (decl
) && TREE_READONLY (decl
)
2029 && DECL_INITIAL (decl
) != 0
2030 && host_integerp (DECL_INITIAL (decl
), 0)
2031 && ! TREE_ASM_WRITTEN (decl
)
2032 && (DECL_CONTEXT (decl
) == NULL_TREE
2033 || TREE_CODE (DECL_CONTEXT (decl
)) == BLOCK
))
2035 if (TREE_PUBLIC (decl
) == 0)
2037 /* The sun4 assembler does not grok this. */
2038 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
2040 if (TREE_CODE (TREE_TYPE (decl
)) == INTEGER_TYPE
2041 || TREE_CODE (TREE_TYPE (decl
)) == ENUMERAL_TYPE
)
2043 HOST_WIDE_INT ival
= tree_low_cst (DECL_INITIAL (decl
), 0);
2044 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
2045 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile
, name
, ival
);
2047 fprintf (asmfile
, "%s\"%s:c=i", ASM_STABS_OP
, name
);
2049 fprintf (asmfile
, HOST_WIDE_INT_PRINT_DEC
, ival
);
2050 fprintf (asmfile
, "\",0x%x,0,0,0\n", N_LSYM
);
2054 else if (TREE_CODE (TREE_TYPE (decl
)) == REAL_TYPE
)
2056 /* don't know how to do this yet. */
2060 /* else it is something we handle like a normal variable. */
2063 SET_DECL_RTL (decl
, eliminate_regs (DECL_RTL (decl
), 0, NULL_RTX
));
2064 #ifdef LEAF_REG_REMAP
2065 if (current_function_uses_only_leaf_regs
)
2066 leaf_renumber_regs_insn (DECL_RTL (decl
));
2069 result
= dbxout_symbol_location (decl
, type
, 0, DECL_RTL (decl
));
2078 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
2079 Add SUFFIX to its name, if SUFFIX is not 0.
2080 Describe the variable as residing in HOME
2081 (usually HOME is DECL_RTL (DECL), but not always).
2082 Returns 1 if the stab was really emitted. */
2085 dbxout_symbol_location (decl
, type
, suffix
, home
)
2093 /* Don't mention a variable at all
2094 if it was completely optimized into nothingness.
2096 If the decl was from an inline function, then its rtl
2097 is not identically the rtl that was used in this
2098 particular compilation. */
2099 if (GET_CODE (home
) == REG
)
2101 regno
= REGNO (home
);
2102 if (regno
>= FIRST_PSEUDO_REGISTER
)
2105 else if (GET_CODE (home
) == SUBREG
)
2109 while (GET_CODE (value
) == SUBREG
)
2110 value
= SUBREG_REG (value
);
2111 if (GET_CODE (value
) == REG
)
2113 if (REGNO (value
) >= FIRST_PSEUDO_REGISTER
)
2116 regno
= REGNO (alter_subreg (home
));
2119 /* The kind-of-variable letter depends on where
2120 the variable is and on the scope of its name:
2121 G and N_GSYM for static storage and global scope,
2122 S for static storage and file scope,
2123 V for static storage and local scope,
2124 for those two, use N_LCSYM if data is in bss segment,
2125 N_STSYM if in data segment, N_FUN otherwise.
2126 (We used N_FUN originally, then changed to N_STSYM
2127 to please GDB. However, it seems that confused ld.
2128 Now GDB has been fixed to like N_FUN, says Kingdon.)
2129 no letter at all, and N_LSYM, for auto variable,
2130 r and N_RSYM for register variable. */
2132 if (GET_CODE (home
) == MEM
2133 && GET_CODE (XEXP (home
, 0)) == SYMBOL_REF
)
2135 if (TREE_PUBLIC (decl
))
2138 current_sym_code
= N_GSYM
;
2142 current_sym_addr
= XEXP (home
, 0);
2144 letter
= decl_function_context (decl
) ? 'V' : 'S';
2146 /* This should be the same condition as in assemble_variable, but
2147 we don't have access to dont_output_data here. So, instead,
2148 we rely on the fact that error_mark_node initializers always
2149 end up in bss for C++ and never end up in bss for C. */
2150 if (DECL_INITIAL (decl
) == 0
2151 || (!strcmp (lang_identify (), "cplusplus")
2152 && DECL_INITIAL (decl
) == error_mark_node
))
2153 current_sym_code
= N_LCSYM
;
2154 else if (DECL_IN_TEXT_SECTION (decl
))
2155 /* This is not quite right, but it's the closest
2156 of all the codes that Unix defines. */
2157 current_sym_code
= DBX_STATIC_CONST_VAR_CODE
;
2160 /* Ultrix `as' seems to need this. */
2161 #ifdef DBX_STATIC_STAB_DATA_SECTION
2164 current_sym_code
= N_STSYM
;
2168 else if (regno
>= 0)
2171 current_sym_code
= N_RSYM
;
2172 current_sym_value
= DBX_REGISTER_NUMBER (regno
);
2174 else if (GET_CODE (home
) == MEM
2175 && (GET_CODE (XEXP (home
, 0)) == MEM
2176 || (GET_CODE (XEXP (home
, 0)) == REG
2177 && REGNO (XEXP (home
, 0)) != HARD_FRAME_POINTER_REGNUM
2178 && REGNO (XEXP (home
, 0)) != STACK_POINTER_REGNUM
2179 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2180 && REGNO (XEXP (home
, 0)) != ARG_POINTER_REGNUM
2183 /* If the value is indirect by memory or by a register
2184 that isn't the frame pointer
2185 then it means the object is variable-sized and address through
2186 that register or stack slot. DBX has no way to represent this
2187 so all we can do is output the variable as a pointer.
2188 If it's not a parameter, ignore it.
2189 (VAR_DECLs like this can be made by integrate.c.) */
2191 if (GET_CODE (XEXP (home
, 0)) == REG
)
2194 current_sym_code
= N_RSYM
;
2195 current_sym_value
= DBX_REGISTER_NUMBER (REGNO (XEXP (home
, 0)));
2199 current_sym_code
= N_LSYM
;
2200 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2201 We want the value of that CONST_INT. */
2203 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home
, 0), 0));
2206 /* Effectively do build_pointer_type, but don't cache this type,
2207 since it might be temporary whereas the type it points to
2208 might have been saved for inlining. */
2209 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2210 type
= make_node (POINTER_TYPE
);
2211 TREE_TYPE (type
) = TREE_TYPE (decl
);
2213 else if (GET_CODE (home
) == MEM
2214 && GET_CODE (XEXP (home
, 0)) == REG
)
2216 current_sym_code
= N_LSYM
;
2217 current_sym_value
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
2219 else if (GET_CODE (home
) == MEM
2220 && GET_CODE (XEXP (home
, 0)) == PLUS
2221 && GET_CODE (XEXP (XEXP (home
, 0), 1)) == CONST_INT
)
2223 current_sym_code
= N_LSYM
;
2224 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2225 We want the value of that CONST_INT. */
2226 current_sym_value
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
2228 else if (GET_CODE (home
) == MEM
2229 && GET_CODE (XEXP (home
, 0)) == CONST
)
2231 /* Handle an obscure case which can arise when optimizing and
2232 when there are few available registers. (This is *always*
2233 the case for i386/i486 targets). The RTL looks like
2234 (MEM (CONST ...)) even though this variable is a local `auto'
2235 or a local `register' variable. In effect, what has happened
2236 is that the reload pass has seen that all assignments and
2237 references for one such a local variable can be replaced by
2238 equivalent assignments and references to some static storage
2239 variable, thereby avoiding the need for a register. In such
2240 cases we're forced to lie to debuggers and tell them that
2241 this variable was itself `static'. */
2242 current_sym_code
= N_LCSYM
;
2244 current_sym_addr
= XEXP (XEXP (home
, 0), 0);
2246 else if (GET_CODE (home
) == CONCAT
)
2250 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE,
2251 for example), then there is no easy way to figure out
2252 what SUBTYPE should be. So, we give up. */
2253 if (TREE_CODE (type
) != COMPLEX_TYPE
)
2256 subtype
= TREE_TYPE (type
);
2258 /* If the variable's storage is in two parts,
2259 output each as a separate stab with a modified name. */
2260 if (WORDS_BIG_ENDIAN
)
2261 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 0));
2263 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 0));
2265 /* Cast avoids warning in old compilers. */
2266 current_sym_code
= (STAB_CODE_TYPE
) 0;
2267 current_sym_value
= 0;
2268 current_sym_addr
= 0;
2269 dbxout_prepare_symbol (decl
);
2271 if (WORDS_BIG_ENDIAN
)
2272 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 1));
2274 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 1));
2278 /* Address might be a MEM, when DECL is a variable-sized object.
2279 Or it might be const0_rtx, meaning previous passes
2280 want us to ignore this variable. */
2283 /* Ok, start a symtab entry and output the variable name. */
2286 #ifdef DBX_STATIC_BLOCK_START
2287 DBX_STATIC_BLOCK_START (asmfile
, current_sym_code
);
2290 dbxout_symbol_name (decl
, suffix
, letter
);
2291 dbxout_type (type
, 0);
2292 dbxout_finish_symbol (decl
);
2294 #ifdef DBX_STATIC_BLOCK_END
2295 DBX_STATIC_BLOCK_END (asmfile
, current_sym_code
);
2300 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2301 Then output LETTER to indicate the kind of location the symbol has. */
2304 dbxout_symbol_name (decl
, suffix
, letter
)
2311 if (DECL_CONTEXT (decl
) && TYPE_P (DECL_CONTEXT (decl
)))
2312 /* One slight hitch: if this is a VAR_DECL which is a static
2313 class member, we must put out the mangled name instead of the
2314 DECL_NAME. Note also that static member (variable) names DO NOT begin
2315 with underscores in .stabs directives. */
2316 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
2318 /* ...but if we're function-local, we don't want to include the junk
2319 added by ASM_FORMAT_PRIVATE_NAME. */
2320 name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
2324 fprintf (asmfile
, "%s\"%s%s:", ASM_STABS_OP
, name
,
2325 (suffix
? suffix
: ""));
2328 putc (letter
, asmfile
);
2332 dbxout_prepare_symbol (decl
)
2333 tree decl ATTRIBUTE_UNUSED
;
2336 const char *filename
= DECL_SOURCE_FILE (decl
);
2338 dbxout_source_file (asmfile
, filename
);
2343 dbxout_finish_symbol (sym
)
2346 #ifdef DBX_FINISH_SYMBOL
2347 DBX_FINISH_SYMBOL (sym
);
2350 if (use_gnu_debug_info_extensions
&& sym
!= 0)
2351 line
= DECL_SOURCE_LINE (sym
);
2353 fprintf (asmfile
, "\",%d,0,%d,", current_sym_code
, line
);
2354 if (current_sym_addr
)
2355 output_addr_const (asmfile
, current_sym_addr
);
2357 fprintf (asmfile
, "%d", current_sym_value
);
2358 putc ('\n', asmfile
);
2362 /* Output definitions of all the decls in a chain. Return non-zero if
2363 anything was output */
2372 result
+= dbxout_symbol (syms
, 1);
2373 syms
= TREE_CHAIN (syms
);
2378 /* The following two functions output definitions of function parameters.
2379 Each parameter gets a definition locating it in the parameter list.
2380 Each parameter that is a register variable gets a second definition
2381 locating it in the register.
2383 Printing or argument lists in gdb uses the definitions that
2384 locate in the parameter list. But reference to the variable in
2385 expressions uses preferentially the definition as a register. */
2387 /* Output definitions, referring to storage in the parmlist,
2388 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2391 dbxout_parms (parms
)
2394 for (; parms
; parms
= TREE_CHAIN (parms
))
2395 if (DECL_NAME (parms
) && TREE_TYPE (parms
) != error_mark_node
)
2397 dbxout_prepare_symbol (parms
);
2399 /* Perform any necessary register eliminations on the parameter's rtl,
2400 so that the debugging output will be accurate. */
2401 DECL_INCOMING_RTL (parms
)
2402 = eliminate_regs (DECL_INCOMING_RTL (parms
), 0, NULL_RTX
);
2403 SET_DECL_RTL (parms
, eliminate_regs (DECL_RTL (parms
), 0, NULL_RTX
));
2404 #ifdef LEAF_REG_REMAP
2405 if (current_function_uses_only_leaf_regs
)
2407 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms
));
2408 leaf_renumber_regs_insn (DECL_RTL (parms
));
2412 if (PARM_PASSED_IN_MEMORY (parms
))
2414 rtx addr
= XEXP (DECL_INCOMING_RTL (parms
), 0);
2416 /* ??? Here we assume that the parm address is indexed
2417 off the frame pointer or arg pointer.
2418 If that is not true, we produce meaningless results,
2419 but do not crash. */
2420 if (GET_CODE (addr
) == PLUS
2421 && GET_CODE (XEXP (addr
, 1)) == CONST_INT
)
2422 current_sym_value
= INTVAL (XEXP (addr
, 1));
2424 current_sym_value
= 0;
2426 current_sym_code
= N_PSYM
;
2427 current_sym_addr
= 0;
2430 if (DECL_NAME (parms
))
2432 current_sym_nchars
= 2 + IDENTIFIER_LENGTH (DECL_NAME (parms
));
2434 fprintf (asmfile
, "%s\"%s:%c", ASM_STABS_OP
,
2435 IDENTIFIER_POINTER (DECL_NAME (parms
)),
2436 DBX_MEMPARM_STABS_LETTER
);
2440 current_sym_nchars
= 8;
2441 fprintf (asmfile
, "%s\"(anon):%c", ASM_STABS_OP
,
2442 DBX_MEMPARM_STABS_LETTER
);
2445 /* It is quite tempting to use:
2447 dbxout_type (TREE_TYPE (parms), 0);
2449 as the next statement, rather than using DECL_ARG_TYPE(), so
2450 that gcc reports the actual type of the parameter, rather
2451 than the promoted type. This certainly makes GDB's life
2452 easier, at least for some ports. The change is a bad idea
2453 however, since GDB expects to be able access the type without
2454 performing any conversions. So for example, if we were
2455 passing a float to an unprototyped function, gcc will store a
2456 double on the stack, but if we emit a stab saying the type is a
2457 float, then gdb will only read in a single value, and this will
2458 produce an erropneous value. */
2459 dbxout_type (DECL_ARG_TYPE (parms
), 0);
2460 current_sym_value
= DEBUGGER_ARG_OFFSET (current_sym_value
, addr
);
2461 dbxout_finish_symbol (parms
);
2463 else if (GET_CODE (DECL_RTL (parms
)) == REG
)
2466 char regparm_letter
;
2468 /* Parm passed in registers and lives in registers or nowhere. */
2470 current_sym_code
= DBX_REGPARM_STABS_CODE
;
2471 regparm_letter
= DBX_REGPARM_STABS_LETTER
;
2472 current_sym_addr
= 0;
2474 /* If parm lives in a register, use that register;
2475 pretend the parm was passed there. It would be more consistent
2476 to describe the register where the parm was passed,
2477 but in practice that register usually holds something else.
2479 If we use DECL_RTL, then we must use the declared type of
2480 the variable, not the type that it arrived in. */
2481 if (REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
2483 best_rtl
= DECL_RTL (parms
);
2484 parm_type
= TREE_TYPE (parms
);
2486 /* If the parm lives nowhere, use the register where it was
2487 passed. It is also better to use the declared type here. */
2490 best_rtl
= DECL_INCOMING_RTL (parms
);
2491 parm_type
= TREE_TYPE (parms
);
2493 current_sym_value
= DBX_REGISTER_NUMBER (REGNO (best_rtl
));
2496 if (DECL_NAME (parms
))
2498 current_sym_nchars
= 2 + IDENTIFIER_LENGTH (DECL_NAME (parms
));
2499 fprintf (asmfile
, "%s\"%s:%c", ASM_STABS_OP
,
2500 IDENTIFIER_POINTER (DECL_NAME (parms
)),
2505 current_sym_nchars
= 8;
2506 fprintf (asmfile
, "%s\"(anon):%c", ASM_STABS_OP
,
2510 dbxout_type (parm_type
, 0);
2511 dbxout_finish_symbol (parms
);
2513 else if (GET_CODE (DECL_RTL (parms
)) == MEM
2514 && GET_CODE (XEXP (DECL_RTL (parms
), 0)) == REG
2515 && REGNO (XEXP (DECL_RTL (parms
), 0)) != HARD_FRAME_POINTER_REGNUM
2516 && REGNO (XEXP (DECL_RTL (parms
), 0)) != STACK_POINTER_REGNUM
2517 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2518 && REGNO (XEXP (DECL_RTL (parms
), 0)) != ARG_POINTER_REGNUM
2522 /* Parm was passed via invisible reference.
2523 That is, its address was passed in a register.
2524 Output it as if it lived in that register.
2525 The debugger will know from the type
2526 that it was actually passed by invisible reference. */
2528 char regparm_letter
;
2529 /* Parm passed in registers and lives in registers or nowhere. */
2531 current_sym_code
= DBX_REGPARM_STABS_CODE
;
2532 if (use_gnu_debug_info_extensions
)
2533 regparm_letter
= GDB_INV_REF_REGPARM_STABS_LETTER
;
2535 regparm_letter
= DBX_REGPARM_STABS_LETTER
;
2537 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2538 If it is an unallocated pseudo-reg, then use the register where
2539 it was passed instead. */
2540 if (REGNO (XEXP (DECL_RTL (parms
), 0)) < FIRST_PSEUDO_REGISTER
)
2541 current_sym_value
= REGNO (XEXP (DECL_RTL (parms
), 0));
2543 current_sym_value
= REGNO (DECL_INCOMING_RTL (parms
));
2545 current_sym_addr
= 0;
2548 if (DECL_NAME (parms
))
2551 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms
)));
2553 fprintf (asmfile
, "%s\"%s:%c", ASM_STABS_OP
,
2554 IDENTIFIER_POINTER (DECL_NAME (parms
)),
2559 current_sym_nchars
= 8;
2560 fprintf (asmfile
, "%s\"(anon):%c", ASM_STABS_OP
,
2564 dbxout_type (TREE_TYPE (parms
), 0);
2565 dbxout_finish_symbol (parms
);
2567 else if (GET_CODE (DECL_RTL (parms
)) == MEM
2568 && GET_CODE (XEXP (DECL_RTL (parms
), 0)) == MEM
)
2570 /* Parm was passed via invisible reference, with the reference
2571 living on the stack. DECL_RTL looks like
2572 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it
2573 could look like (MEM (MEM (REG))). */
2574 const char *decl_name
= (DECL_NAME (parms
)
2575 ? IDENTIFIER_POINTER (DECL_NAME (parms
))
2577 if (GET_CODE (XEXP (XEXP (DECL_RTL (parms
), 0), 0)) == REG
)
2578 current_sym_value
= 0;
2581 = INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms
), 0), 0), 1));
2582 current_sym_addr
= 0;
2585 fprintf (asmfile
, "%s\"%s:v", ASM_STABS_OP
, decl_name
);
2586 dbxout_type (TREE_TYPE (parms
), 0);
2587 dbxout_finish_symbol (parms
);
2589 else if (GET_CODE (DECL_RTL (parms
)) == MEM
2590 && XEXP (DECL_RTL (parms
), 0) != const0_rtx
2591 /* ??? A constant address for a parm can happen
2592 when the reg it lives in is equiv to a constant in memory.
2593 Should make this not happen, after 2.4. */
2594 && ! CONSTANT_P (XEXP (DECL_RTL (parms
), 0)))
2596 /* Parm was passed in registers but lives on the stack. */
2598 current_sym_code
= N_PSYM
;
2599 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2600 in which case we want the value of that CONST_INT,
2602 in which case we use a value of zero. */
2603 if (GET_CODE (XEXP (DECL_RTL (parms
), 0)) == REG
)
2604 current_sym_value
= 0;
2607 = INTVAL (XEXP (XEXP (DECL_RTL (parms
), 0), 1));
2609 current_sym_addr
= 0;
2611 /* Make a big endian correction if the mode of the type of the
2612 parameter is not the same as the mode of the rtl. */
2613 if (BYTES_BIG_ENDIAN
2614 && TYPE_MODE (TREE_TYPE (parms
)) != GET_MODE (DECL_RTL (parms
))
2615 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
))) < UNITS_PER_WORD
)
2617 current_sym_value
+=
2618 GET_MODE_SIZE (GET_MODE (DECL_RTL (parms
)))
2619 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
)));
2623 if (DECL_NAME (parms
))
2626 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms
)));
2628 fprintf (asmfile
, "%s\"%s:%c", ASM_STABS_OP
,
2629 IDENTIFIER_POINTER (DECL_NAME (parms
)),
2630 DBX_MEMPARM_STABS_LETTER
);
2634 current_sym_nchars
= 8;
2635 fprintf (asmfile
, "%s\"(anon):%c", ASM_STABS_OP
,
2636 DBX_MEMPARM_STABS_LETTER
);
2640 = DEBUGGER_ARG_OFFSET (current_sym_value
,
2641 XEXP (DECL_RTL (parms
), 0));
2642 dbxout_type (TREE_TYPE (parms
), 0);
2643 dbxout_finish_symbol (parms
);
2648 /* Output definitions for the places where parms live during the function,
2649 when different from where they were passed, when the parms were passed
2652 It is not useful to do this for parms passed in registers
2653 that live during the function in different registers, because it is
2654 impossible to look in the passed register for the passed value,
2655 so we use the within-the-function register to begin with.
2657 PARMS is a chain of PARM_DECL nodes. */
2660 dbxout_reg_parms (parms
)
2663 for (; parms
; parms
= TREE_CHAIN (parms
))
2664 if (DECL_NAME (parms
) && PARM_PASSED_IN_MEMORY (parms
))
2666 dbxout_prepare_symbol (parms
);
2668 /* Report parms that live in registers during the function
2669 but were passed in memory. */
2670 if (GET_CODE (DECL_RTL (parms
)) == REG
2671 && REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
2672 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
2673 0, DECL_RTL (parms
));
2674 else if (GET_CODE (DECL_RTL (parms
)) == CONCAT
)
2675 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
2676 0, DECL_RTL (parms
));
2677 /* Report parms that live in memory but not where they were passed. */
2678 else if (GET_CODE (DECL_RTL (parms
)) == MEM
2679 && ! rtx_equal_p (DECL_RTL (parms
), DECL_INCOMING_RTL (parms
)))
2680 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
2681 0, DECL_RTL (parms
));
2685 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2686 output definitions of those names, in raw form */
2694 putc (',', asmfile
);
2695 dbxout_type (TREE_VALUE (args
), 0);
2697 args
= TREE_CHAIN (args
);
2701 /* Output everything about a symbol block (a BLOCK node
2702 that represents a scope level),
2703 including recursive output of contained blocks.
2705 BLOCK is the BLOCK node.
2706 DEPTH is its depth within containing symbol blocks.
2707 ARGS is usually zero; but for the outermost block of the
2708 body of a function, it is a chain of PARM_DECLs for the function parameters.
2709 We output definitions of all the register parms
2710 as if they were local variables of that block.
2712 If -g1 was used, we count blocks just the same, but output nothing
2713 except for the outermost block.
2715 Actually, BLOCK may be several blocks chained together.
2716 We handle them all in sequence. */
2719 dbxout_block (block
, depth
, args
)
2720 register tree block
;
2726 #if DBX_BLOCKS_FUNCTION_RELATIVE
2727 const char *begin_label
;
2728 if (current_function_func_begin_label
!= NULL_TREE
)
2729 begin_label
= IDENTIFIER_POINTER (current_function_func_begin_label
);
2731 begin_label
= XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0);
2736 /* Ignore blocks never expanded or otherwise marked as real. */
2737 if (TREE_USED (block
) && TREE_ASM_WRITTEN (block
))
2741 #ifdef DBX_LBRAC_FIRST
2744 /* In dbx format, the syms of a block come before the N_LBRAC.
2745 If nothing is output, we don't need the N_LBRAC, either. */
2747 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
2748 did_output
= dbxout_syms (BLOCK_VARS (block
));
2750 dbxout_reg_parms (args
);
2753 /* Now output an N_LBRAC symbol to represent the beginning of
2754 the block. Use the block's tree-walk order to generate
2755 the assembler symbols LBBn and LBEn
2756 that final will define around the code in this block. */
2757 if (depth
> 0 && did_output
)
2760 blocknum
= BLOCK_NUMBER (block
);
2761 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBB", blocknum
);
2763 if (BLOCK_HANDLER_BLOCK (block
))
2765 /* A catch block. Must precede N_LBRAC. */
2766 tree decl
= BLOCK_VARS (block
);
2769 #ifdef DBX_OUTPUT_CATCH
2770 DBX_OUTPUT_CATCH (asmfile
, decl
, buf
);
2772 fprintf (asmfile
, "%s\"%s:C1\",%d,0,0,", ASM_STABS_OP
,
2773 IDENTIFIER_POINTER (DECL_NAME (decl
)), N_CATCH
);
2774 assemble_name (asmfile
, buf
);
2775 fprintf (asmfile
, "\n");
2777 decl
= TREE_CHAIN (decl
);
2781 #ifdef DBX_OUTPUT_LBRAC
2782 DBX_OUTPUT_LBRAC (asmfile
, buf
);
2784 fprintf (asmfile
, "%s%d,0,0,", ASM_STABN_OP
, N_LBRAC
);
2785 assemble_name (asmfile
, buf
);
2786 #if DBX_BLOCKS_FUNCTION_RELATIVE
2787 putc ('-', asmfile
);
2788 assemble_name (asmfile
, begin_label
);
2790 fprintf (asmfile
, "\n");
2794 #ifdef DBX_LBRAC_FIRST
2795 /* On some weird machines, the syms of a block
2796 come after the N_LBRAC. */
2797 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
2798 dbxout_syms (BLOCK_VARS (block
));
2800 dbxout_reg_parms (args
);
2803 /* Output the subblocks. */
2804 dbxout_block (BLOCK_SUBBLOCKS (block
), depth
+ 1, NULL_TREE
);
2806 /* Refer to the marker for the end of the block. */
2807 if (depth
> 0 && did_output
)
2810 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBE", blocknum
);
2811 #ifdef DBX_OUTPUT_RBRAC
2812 DBX_OUTPUT_RBRAC (asmfile
, buf
);
2814 fprintf (asmfile
, "%s%d,0,0,", ASM_STABN_OP
, N_RBRAC
);
2815 assemble_name (asmfile
, buf
);
2816 #if DBX_BLOCKS_FUNCTION_RELATIVE
2817 putc ('-', asmfile
);
2818 assemble_name (asmfile
, begin_label
);
2820 fprintf (asmfile
, "\n");
2824 block
= BLOCK_CHAIN (block
);
2828 /* Output the information about a function and its arguments and result.
2829 Usually this follows the function's code,
2830 but on some systems, it comes before. */
2833 dbxout_begin_function (decl
)
2836 dbxout_symbol (decl
, 0);
2837 dbxout_parms (DECL_ARGUMENTS (decl
));
2838 if (DECL_NAME (DECL_RESULT (decl
)) != 0)
2839 dbxout_symbol (DECL_RESULT (decl
), 1);
2842 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */