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, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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'. */
73 #include "coretypes.h"
80 #include "insn-config.h"
82 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
90 #include "langhooks.h"
92 #ifdef XCOFF_DEBUGGING_INFO
96 #undef DBXOUT_DECR_NESTING
97 #define DBXOUT_DECR_NESTING \
98 if (--debug_nesting == 0 && symbol_queue_index > 0) \
99 { emit_pending_bincls_if_required (); debug_flush_symbol_queue (); }
101 #undef DBXOUT_DECR_NESTING_AND_RETURN
102 #define DBXOUT_DECR_NESTING_AND_RETURN(x) \
103 do {--debug_nesting; return (x);} while (0)
106 #define ASM_STABS_OP "\t.stabs\t"
110 #define ASM_STABN_OP "\t.stabn\t"
113 #ifndef DBX_TYPE_DECL_STABS_CODE
114 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
117 #ifndef DBX_STATIC_CONST_VAR_CODE
118 #define DBX_STATIC_CONST_VAR_CODE N_FUN
121 #ifndef DBX_REGPARM_STABS_CODE
122 #define DBX_REGPARM_STABS_CODE N_RSYM
125 #ifndef DBX_REGPARM_STABS_LETTER
126 #define DBX_REGPARM_STABS_LETTER 'P'
129 /* This is used for parameters passed by invisible reference in a register. */
130 #ifndef GDB_INV_REF_REGPARM_STABS_LETTER
131 #define GDB_INV_REF_REGPARM_STABS_LETTER 'a'
134 #ifndef DBX_MEMPARM_STABS_LETTER
135 #define DBX_MEMPARM_STABS_LETTER 'p'
138 #ifndef FILE_NAME_JOINER
139 #define FILE_NAME_JOINER "/"
142 /* GDB needs to know that the stabs were generated by GCC. We emit an
143 N_OPT stab at the beginning of the source file to indicate this.
144 The string is historical, and different on a very few targets. */
145 #ifndef STABS_GCC_MARKER
146 #define STABS_GCC_MARKER "gcc2_compiled."
149 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED};
151 /* Structure recording information about a C data type.
152 The status element says whether we have yet output
153 the definition of the type. TYPE_XREF says we have
154 output it as a cross-reference only.
155 The file_number and type_number elements are used if DBX_USE_BINCL
158 struct typeinfo GTY(())
160 enum typestatus status;
165 /* Vector recording information about C data types.
166 When we first notice a data type (a tree node),
167 we assign it a number using next_type_number.
168 That is its index in this vector. */
170 static GTY ((length ("typevec_len"))) struct typeinfo *typevec;
172 /* Number of elements of space allocated in `typevec'. */
174 static GTY(()) int typevec_len;
176 /* In dbx output, each type gets a unique number.
177 This is the number for the next type output.
178 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
180 static GTY(()) int next_type_number;
182 enum binclstatus {BINCL_NOT_REQUIRED, BINCL_PENDING, BINCL_PROCESSED};
184 /* When using N_BINCL in dbx output, each type number is actually a
185 pair of the file number and the type number within the file.
186 This is a stack of input files. */
190 struct dbx_file *next;
192 int next_type_number;
193 enum binclstatus bincl_status; /* Keep track of lazy bincl. */
194 const char *pending_bincl_name; /* Name of bincl. */
195 struct dbx_file *prev; /* Chain to traverse all pending bincls. */
198 /* This is the top of the stack.
200 This is not saved for PCH, because restoring a PCH should not change it.
201 next_file_number does have to be saved, because the PCH may use some
202 file numbers; however, just before restoring a PCH, next_file_number
203 should always be 0 because we should not have needed any file numbers
206 #if (defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)) \
207 && defined (DBX_USE_BINCL)
208 static struct dbx_file *current_file;
211 /* This is the next file number to use. */
213 static GTY(()) int next_file_number;
215 /* A counter for dbxout_function_end. */
217 static GTY(()) int scope_labelno;
219 /* A counter for dbxout_source_line. */
221 static GTY(()) int dbxout_source_line_counter;
223 /* Nonzero if we have actually used any of the GDB extensions
224 to the debugging format. The idea is that we use them for the
225 first time only if there's a strong reason, but once we have done that,
226 we use them whenever convenient. */
228 static GTY(()) int have_used_extensions = 0;
230 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
231 for the N_SO filename stabs label. */
233 static GTY(()) int source_label_number = 1;
235 /* Last source file name mentioned in a NOTE insn. */
237 static GTY(()) const char *lastfile;
239 /* Used by PCH machinery to detect if 'lastfile' should be reset to
241 static GTY(()) int lastfile_is_base;
243 /* Typical USG systems don't have stab.h, and they also have
244 no use for DBX-format debugging info. */
246 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
249 /* If zero then there is no pending BINCL. */
250 static int pending_bincls = 0;
253 /* The original input file name. */
254 static const char *base_input_file;
256 /* Current working directory. */
258 static const char *cwd;
260 #ifdef DEBUG_SYMS_TEXT
261 #define FORCE_TEXT function_section (current_function_decl);
268 #define STAB_CODE_TYPE enum __stab_debug_code
270 /* 1 if PARM is passed to this function in memory. */
272 #define PARM_PASSED_IN_MEMORY(PARM) \
273 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
275 /* A C expression for the integer offset value of an automatic variable
276 (N_LSYM) having address X (an RTX). */
277 #ifndef DEBUGGER_AUTO_OFFSET
278 #define DEBUGGER_AUTO_OFFSET(X) \
279 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
282 /* A C expression for the integer offset value of an argument (N_PSYM)
283 having address X (an RTX). The nominal offset is OFFSET. */
284 #ifndef DEBUGGER_ARG_OFFSET
285 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
288 /* Stream for writing to assembler file. */
290 static FILE *asmfile;
292 /* These variables are for dbxout_symbol to communicate to
293 dbxout_finish_symbol.
294 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
295 current_sym_value and current_sym_addr are two ways to address the
296 value to store in the symtab entry.
297 current_sym_addr if nonzero represents the value as an rtx.
298 If that is zero, current_sym_value is used. This is used
299 when the value is an offset (such as for auto variables,
300 register variables and parms). */
302 static STAB_CODE_TYPE current_sym_code;
303 static int current_sym_value;
304 static rtx current_sym_addr;
306 /* Number of chars of symbol-description generated so far for the
307 current symbol. Used by CHARS and CONTIN. */
309 static int current_sym_nchars;
311 /* Report having output N chars of the current symbol-description. */
313 #define CHARS(N) (current_sym_nchars += (N))
315 /* Break the current symbol-description, generating a continuation,
316 if it has become long. */
318 #ifndef DBX_CONTIN_LENGTH
319 #define DBX_CONTIN_LENGTH 80
322 #if DBX_CONTIN_LENGTH > 0
324 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
326 #define CONTIN do { } while (0)
330 static void emit_bincl_stab (const char *c);
331 static void emit_pending_bincls (void);
333 static inline void emit_pending_bincls_if_required (void);
335 static void dbxout_init (const char *);
336 static void dbxout_finish (const char *);
337 static void dbxout_start_source_file (unsigned, const char *);
338 static void dbxout_end_source_file (unsigned);
339 static void dbxout_typedefs (tree);
340 static void dbxout_type_index (tree);
341 #if DBX_CONTIN_LENGTH > 0
342 static void dbxout_continue (void);
344 static void dbxout_args (tree);
345 static void dbxout_type_fields (tree);
346 static void dbxout_type_method_1 (tree, const char *);
347 static void dbxout_type_methods (tree);
348 static void dbxout_range_type (tree);
349 static void dbxout_type (tree, int);
350 static bool print_int_cst_bounds_in_octal_p (tree);
351 static void print_int_cst_octal (tree);
352 static void print_octal (unsigned HOST_WIDE_INT, int);
353 static void print_wide_int (HOST_WIDE_INT);
354 static void dbxout_type_name (tree);
355 static void dbxout_class_name_qualifiers (tree);
356 static int dbxout_symbol_location (tree, tree, const char *, rtx);
357 static void dbxout_symbol_name (tree, const char *, int);
358 static void dbxout_prepare_symbol (tree);
359 static void dbxout_finish_symbol (tree);
360 static void dbxout_block (tree, int, tree);
361 static void dbxout_global_decl (tree);
362 static void dbxout_handle_pch (unsigned);
364 /* The debug hooks structure. */
365 #if defined (DBX_DEBUGGING_INFO)
367 static void dbxout_source_line (unsigned int, const char *);
368 static void dbxout_source_file (FILE *, const char *);
369 static void dbxout_function_end (void);
370 static void dbxout_begin_function (tree);
371 static void dbxout_begin_block (unsigned, unsigned);
372 static void dbxout_end_block (unsigned, unsigned);
373 static void dbxout_function_decl (tree);
375 const struct gcc_debug_hooks dbx_debug_hooks =
379 debug_nothing_int_charstar,
380 debug_nothing_int_charstar,
381 dbxout_start_source_file,
382 dbxout_end_source_file,
385 debug_true_tree, /* ignore_block */
386 dbxout_source_line, /* source_line */
387 dbxout_source_line, /* begin_prologue: just output line info */
388 debug_nothing_int_charstar, /* end_prologue */
389 debug_nothing_int_charstar, /* end_epilogue */
390 #ifdef DBX_FUNCTION_FIRST
391 dbxout_begin_function,
393 debug_nothing_tree, /* begin_function */
395 debug_nothing_int, /* end_function */
396 dbxout_function_decl,
397 dbxout_global_decl, /* global_decl */
398 debug_nothing_tree, /* deferred_inline_function */
399 debug_nothing_tree, /* outlining_inline_function */
400 debug_nothing_rtx, /* label */
401 dbxout_handle_pch /* handle_pch */
403 #endif /* DBX_DEBUGGING_INFO */
405 #if defined (XCOFF_DEBUGGING_INFO)
406 const struct gcc_debug_hooks xcoff_debug_hooks =
410 debug_nothing_int_charstar,
411 debug_nothing_int_charstar,
412 dbxout_start_source_file,
413 dbxout_end_source_file,
414 xcoffout_begin_block,
416 debug_true_tree, /* ignore_block */
417 xcoffout_source_line,
418 xcoffout_begin_prologue, /* begin_prologue */
419 debug_nothing_int_charstar, /* end_prologue */
420 xcoffout_end_epilogue,
421 debug_nothing_tree, /* begin_function */
422 xcoffout_end_function,
423 debug_nothing_tree, /* function_decl */
424 dbxout_global_decl, /* global_decl */
425 debug_nothing_tree, /* deferred_inline_function */
426 debug_nothing_tree, /* outlining_inline_function */
427 debug_nothing_rtx, /* label */
428 dbxout_handle_pch /* handle_pch */
430 #endif /* XCOFF_DEBUGGING_INFO */
432 #if defined (DBX_DEBUGGING_INFO)
434 dbxout_function_end (void)
436 char lscope_label_name[100];
437 /* Convert Ltext into the appropriate format for local labels in case
438 the system doesn't insert underscores in front of user generated
440 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name, "Lscope", scope_labelno);
441 (*targetm.asm_out.internal_label) (asmfile, "Lscope", scope_labelno);
444 /* By convention, GCC will mark the end of a function with an N_FUN
445 symbol and an empty string. */
446 #ifdef DBX_OUTPUT_NFUN
447 DBX_OUTPUT_NFUN (asmfile, lscope_label_name, current_function_decl);
449 fprintf (asmfile, "%s\"\",%d,0,0,", ASM_STABS_OP, N_FUN);
450 assemble_name (asmfile, lscope_label_name);
452 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
453 fprintf (asmfile, "\n");
456 #endif /* DBX_DEBUGGING_INFO */
458 /* At the beginning of compilation, start writing the symbol table.
459 Initialize `typevec' and output the standard data types of C. */
462 dbxout_init (const char *input_file_name)
464 char ltext_label_name[100];
465 tree syms = (*lang_hooks.decls.getdecls) ();
467 asmfile = asm_out_file;
470 typevec = ggc_calloc (typevec_len, sizeof typevec[0]);
472 /* Convert Ltext into the appropriate format for local labels in case
473 the system doesn't insert underscores in front of user generated
475 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
477 /* Put the current working directory in an N_SO symbol. */
478 if (use_gnu_debug_info_extensions)
480 if (!cwd && (cwd = get_src_pwd ())
481 && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
482 cwd = concat (cwd, FILE_NAME_JOINER, NULL);
485 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
486 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd);
487 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
488 fprintf (asmfile, "%s", ASM_STABS_OP);
489 output_quoted_string (asmfile, cwd);
490 fprintf (asmfile, ",%d,0,0,", N_SO);
491 assemble_name (asmfile, ltext_label_name);
492 fputc ('\n', asmfile);
493 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
497 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
498 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
499 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
500 /* We include outputting `Ltext:' here,
501 because that gives you a way to override it. */
502 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
503 fprintf (asmfile, "%s", ASM_STABS_OP);
504 output_quoted_string (asmfile, input_file_name);
505 fprintf (asmfile, ",%d,0,0,", N_SO);
506 assemble_name (asmfile, ltext_label_name);
507 fputc ('\n', asmfile);
509 (*targetm.asm_out.internal_label) (asmfile, "Ltext", 0);
510 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
512 #ifdef DBX_OUTPUT_GCC_MARKER
513 DBX_OUTPUT_GCC_MARKER (asmfile);
515 /* Emit an N_OPT stab to indicate that this file was compiled by GCC. */
516 fprintf (asmfile, "%s\"%s\",%d,0,0,0\n",
517 ASM_STABS_OP, STABS_GCC_MARKER, N_OPT);
520 base_input_file = lastfile = input_file_name;
522 next_type_number = 1;
525 current_file = xmalloc (sizeof *current_file);
526 current_file->next = NULL;
527 current_file->file_number = 0;
528 current_file->next_type_number = 1;
529 next_file_number = 1;
530 current_file->prev = NULL;
531 current_file->bincl_status = BINCL_NOT_REQUIRED;
532 current_file->pending_bincl_name = NULL;
535 /* Make sure that types `int' and `char' have numbers 1 and 2.
536 Definitions of other integer types will refer to those numbers.
537 (Actually it should no longer matter what their numbers are.
538 Also, if any types with tags have been defined, dbxout_symbol
539 will output them first, so the numbers won't be 1 and 2. That
540 happens in C++. So it's a good thing it should no longer matter). */
542 #ifdef DBX_OUTPUT_STANDARD_TYPES
543 DBX_OUTPUT_STANDARD_TYPES (syms);
546 /* Get all permanent types that have typedef names, and output them
547 all, except for those already output. Some language front ends
548 put these declarations in the top-level scope; some do not. */
549 dbxout_typedefs ((*lang_hooks.decls.builtin_type_decls) ());
550 dbxout_typedefs (syms);
553 /* Output any typedef names for types described by TYPE_DECLs in SYMS. */
556 dbxout_typedefs (tree syms)
558 for (; syms != NULL_TREE; syms = TREE_CHAIN (syms))
560 if (TREE_CODE (syms) == TYPE_DECL)
562 tree type = TREE_TYPE (syms);
564 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
565 && COMPLETE_OR_VOID_TYPE_P (type)
566 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
567 dbxout_symbol (TYPE_NAME (type), 0);
573 /* Emit BINCL stab using given name. */
575 emit_bincl_stab (const char *name)
577 fprintf (asmfile, "%s", ASM_STABS_OP);
578 output_quoted_string (asmfile, name);
579 fprintf (asmfile, ",%d,0,0,0\n", N_BINCL);
582 /* If there are pending bincls then it is time to emit all of them. */
585 emit_pending_bincls_if_required (void)
588 emit_pending_bincls ();
591 /* Emit all pending bincls. */
594 emit_pending_bincls (void)
596 struct dbx_file *f = current_file;
598 /* Find first pending bincl. */
599 while (f->bincl_status == BINCL_PENDING)
602 /* Now emit all bincls. */
607 if (f->bincl_status == BINCL_PENDING)
609 emit_bincl_stab (f->pending_bincl_name);
611 /* Update file number and status. */
612 f->file_number = next_file_number++;
613 f->bincl_status = BINCL_PROCESSED;
615 if (f == current_file)
620 /* All pending bincls have been emitted. */
627 emit_pending_bincls_if_required (void) {}
630 /* Change to reading from a new source file. Generate a N_BINCL stab. */
633 dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED,
634 const char *filename ATTRIBUTE_UNUSED)
637 struct dbx_file *n = xmalloc (sizeof *n);
639 n->next = current_file;
640 n->next_type_number = 1;
641 /* Do not assign file number now.
642 Delay it until we actually emit BINCL. */
645 current_file->prev = n;
646 n->bincl_status = BINCL_PENDING;
647 n->pending_bincl_name = filename;
653 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
656 dbxout_end_source_file (unsigned int line ATTRIBUTE_UNUSED)
659 /* Emit EINCL stab only if BINCL is not pending. */
660 if (current_file->bincl_status == BINCL_PROCESSED)
661 fprintf (asmfile, "%s%d,0,0,0\n", ASM_STABN_OP, N_EINCL);
662 current_file->bincl_status = BINCL_NOT_REQUIRED;
663 current_file = current_file->next;
667 /* Handle a few odd cases that occur when trying to make PCH files work. */
670 dbxout_handle_pch (unsigned at_end)
674 /* When using the PCH, this file will be included, so we need to output
676 dbxout_start_source_file (0, lastfile);
678 /* The base file when using the PCH won't be the same as
679 the base file when it's being generated. */
684 /* ... and an EINCL. */
685 dbxout_end_source_file (0);
687 /* Deal with cases where 'lastfile' was never actually changed. */
688 lastfile_is_base = lastfile == NULL;
692 #if defined (DBX_DEBUGGING_INFO)
693 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
696 dbxout_source_file (FILE *file, const char *filename)
698 if (lastfile == 0 && lastfile_is_base)
700 lastfile = base_input_file;
701 lastfile_is_base = 0;
704 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
706 char ltext_label_name[100];
708 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext",
709 source_label_number);
710 fprintf (file, "%s", ASM_STABS_OP);
711 output_quoted_string (file, filename);
712 fprintf (asmfile, ",%d,0,0,", N_SOL);
713 assemble_name (asmfile, ltext_label_name);
714 fputc ('\n', asmfile);
715 if (current_function_decl != NULL_TREE
716 && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
717 ; /* Don't change section amid function. */
720 (*targetm.asm_out.internal_label) (file, "Ltext", source_label_number);
721 source_label_number++;
726 /* Output a line number symbol entry for source file FILENAME and line
730 dbxout_source_line (unsigned int lineno, const char *filename)
732 dbxout_source_file (asmfile, filename);
734 #ifdef ASM_OUTPUT_SOURCE_LINE
735 dbxout_source_line_counter += 1;
736 ASM_OUTPUT_SOURCE_LINE (asmfile, lineno, dbxout_source_line_counter);
738 fprintf (asmfile, "%s%d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
742 /* Describe the beginning of an internal block within a function. */
745 dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n)
747 emit_pending_bincls_if_required ();
748 (*targetm.asm_out.internal_label) (asmfile, "LBB", n);
751 /* Describe the end line-number of an internal block within a function. */
754 dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n)
756 emit_pending_bincls_if_required ();
757 (*targetm.asm_out.internal_label) (asmfile, "LBE", n);
760 /* Output dbx data for a function definition.
761 This includes a definition of the function name itself (a symbol),
762 definitions of the parameters (locating them in the parameter list)
763 and then output the block that makes up the function's body
764 (including all the auto variables of the function). */
767 dbxout_function_decl (tree decl)
769 emit_pending_bincls_if_required ();
770 #ifndef DBX_FUNCTION_FIRST
771 dbxout_begin_function (decl);
773 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
774 #ifdef DBX_OUTPUT_FUNCTION_END
775 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
777 if (use_gnu_debug_info_extensions
778 #if defined(NO_DBX_FUNCTION_END)
779 && ! NO_DBX_FUNCTION_END
781 && targetm.have_named_sections)
782 dbxout_function_end ();
785 #endif /* DBX_DEBUGGING_INFO */
787 /* Debug information for a global DECL. Called from toplev.c after
788 compilation proper has finished. */
790 dbxout_global_decl (tree decl)
792 if (TREE_CODE (decl) == VAR_DECL
793 && ! DECL_EXTERNAL (decl)
794 && DECL_RTL_SET_P (decl)) /* Not necessary? */
796 int saved_tree_used = TREE_USED (decl);
797 TREE_USED (decl) = 1;
798 dbxout_symbol (decl, 0);
799 TREE_USED (decl) = saved_tree_used;
803 /* At the end of compilation, finish writing the symbol table.
804 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
808 dbxout_finish (const char *filename ATTRIBUTE_UNUSED)
810 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
811 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asmfile, filename);
812 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
817 /* Output the index of a type. */
820 dbxout_type_index (tree type)
822 #ifndef DBX_USE_BINCL
823 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
826 struct typeinfo *t = &typevec[TYPE_SYMTAB_ADDRESS (type)];
827 fprintf (asmfile, "(%d,%d)", t->file_number, t->type_number);
832 #if DBX_CONTIN_LENGTH > 0
833 /* Continue a symbol-description that gets too big.
834 End one symbol table entry with a double-backslash
835 and start a new one, eventually producing something like
836 .stabs "start......\\",code,0,value
837 .stabs "...rest",code,0,value */
840 dbxout_continue (void)
842 emit_pending_bincls_if_required ();
843 #ifdef DBX_CONTIN_CHAR
844 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
846 fprintf (asmfile, "\\\\");
848 dbxout_finish_symbol (NULL_TREE);
849 fprintf (asmfile, "%s\"", ASM_STABS_OP);
850 current_sym_nchars = 0;
852 #endif /* DBX_CONTIN_LENGTH > 0 */
854 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
855 This must be a separate function because anonymous unions require
859 dbxout_type_fields (tree type)
863 /* Output the name, type, position (in bits), size (in bits) of each
864 field that we can support. */
865 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
868 /* If on of the nodes is an error_mark or its type is then return early. */
869 if (tem == error_mark_node || TREE_TYPE (tem) == error_mark_node)
872 /* Omit here local type decls until we know how to support them. */
873 if (TREE_CODE (tem) == TYPE_DECL
874 /* Omit fields whose position or size are variable or too large to
876 || (TREE_CODE (tem) == FIELD_DECL
877 && (! host_integerp (bit_position (tem), 0)
879 || ! host_integerp (DECL_SIZE (tem), 1)))
880 /* Omit here the nameless fields that are used to skip bits. */
881 || DECL_IGNORED_P (tem))
884 else if (TREE_CODE (tem) != CONST_DECL)
886 /* Continue the line if necessary,
887 but not before the first field. */
888 if (tem != TYPE_FIELDS (type))
893 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
894 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
898 fprintf (asmfile, ":");
902 if (use_gnu_debug_info_extensions
903 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
904 || TREE_CODE (tem) != FIELD_DECL))
906 have_used_extensions = 1;
908 putc ((TREE_PRIVATE (tem) ? '0'
909 : TREE_PROTECTED (tem) ? '1' : '2'),
914 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
915 && DECL_BIT_FIELD_TYPE (tem))
916 ? DECL_BIT_FIELD_TYPE (tem) : TREE_TYPE (tem), 0);
918 if (TREE_CODE (tem) == VAR_DECL)
920 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
922 tree name = DECL_ASSEMBLER_NAME (tem);
924 have_used_extensions = 1;
925 fprintf (asmfile, ":%s;", IDENTIFIER_POINTER (name));
926 CHARS (IDENTIFIER_LENGTH (name) + 2);
930 /* If TEM is non-static, GDB won't understand it. */
931 fprintf (asmfile, ",0,0;");
938 print_wide_int (int_bit_position (tem));
940 print_wide_int (tree_low_cst (DECL_SIZE (tem), 1));
948 /* Subroutine of `dbxout_type_methods'. Output debug info about the
949 method described DECL. DEBUG_NAME is an encoding of the method's
950 type signature. ??? We may be able to do without DEBUG_NAME altogether
954 dbxout_type_method_1 (tree decl, const char *debug_name)
958 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
960 else /* it's a METHOD_TYPE. */
962 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
963 /* A for normal functions.
964 B for `const' member functions.
965 C for `volatile' member functions.
966 D for `const volatile' member functions. */
967 if (TYPE_READONLY (TREE_TYPE (firstarg)))
969 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
972 if (DECL_VINDEX (decl))
978 fprintf (asmfile, ":%s;%c%c%c", debug_name,
979 TREE_PRIVATE (decl) ? '0'
980 : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
981 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
982 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
984 if (DECL_VINDEX (decl) && host_integerp (DECL_VINDEX (decl), 0))
986 print_wide_int (tree_low_cst (DECL_VINDEX (decl), 0));
989 dbxout_type (DECL_CONTEXT (decl), 0);
990 fprintf (asmfile, ";");
995 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
999 dbxout_type_methods (tree type)
1001 /* C++: put out the method names and their parameter lists */
1002 tree methods = TYPE_METHODS (type);
1006 char formatted_type_identifier_length[16];
1007 int type_identifier_length;
1009 if (methods == NULL_TREE)
1012 type_encoding = DECL_NAME (TYPE_NAME (type));
1015 /* C++: Template classes break some assumptions made by this code about
1016 the class names, constructor names, and encodings for assembler
1017 label names. For now, disable output of dbx info for them. */
1019 const char *ptr = IDENTIFIER_POINTER (type_encoding);
1020 /* This should use index. (mrs) */
1021 while (*ptr && *ptr != '<') ptr++;
1032 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
1034 sprintf (formatted_type_identifier_length, "%d", type_identifier_length);
1036 if (TREE_CODE (methods) != TREE_VEC)
1038 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
1039 fndecl = TREE_VEC_ELT (methods, 0);
1041 fndecl = TREE_VEC_ELT (methods, 1);
1045 int need_prefix = 1;
1047 /* Group together all the methods for the same operation.
1048 These differ in the types of the arguments. */
1049 for (last = NULL_TREE;
1050 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
1051 fndecl = TREE_CHAIN (fndecl))
1052 /* Output the name of the field (after overloading), as
1053 well as the name of the field before overloading, along
1054 with its parameter list */
1056 /* This is the "mangled" name of the method.
1057 It encodes the argument types. */
1058 const char *debug_name;
1060 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these
1061 include TEMPLATE_DECLs.) The debugger doesn't know what
1062 to do with such entities anyhow. */
1063 if (TREE_CODE (fndecl) != FUNCTION_DECL)
1066 debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
1072 /* Also ignore abstract methods; those are only interesting to
1073 the DWARF backends. */
1074 if (DECL_IGNORED_P (fndecl) || DECL_ABSTRACT (fndecl))
1077 /* Redundantly output the plain name, since that's what gdb
1081 tree name = DECL_NAME (fndecl);
1082 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
1083 CHARS (IDENTIFIER_LENGTH (name) + 2);
1087 dbxout_type (TREE_TYPE (fndecl), 0);
1089 dbxout_type_method_1 (fndecl, debug_name);
1093 putc (';', asmfile);
1099 /* Emit a "range" type specification, which has the form:
1100 "r<index type>;<lower bound>;<upper bound>;".
1101 TYPE is an INTEGER_TYPE. */
1104 dbxout_range_type (tree type)
1106 fprintf (asmfile, "r");
1107 if (TREE_TYPE (type))
1108 dbxout_type (TREE_TYPE (type), 0);
1109 else if (TREE_CODE (type) != INTEGER_TYPE)
1110 dbxout_type (type, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
1113 /* Traditionally, we made sure 'int' was type 1, and builtin types
1114 were defined to be sub-ranges of int. Unfortunately, this
1115 does not allow us to distinguish true sub-ranges from integer
1116 types. So, instead we define integer (non-sub-range) types as
1117 sub-ranges of themselves. This matters for Chill. If this isn't
1118 a subrange type, then we want to define it in terms of itself.
1119 However, in C, this may be an anonymous integer type, and we don't
1120 want to emit debug info referring to it. Just calling
1121 dbxout_type_index won't work anyways, because the type hasn't been
1122 defined yet. We make this work for both cases by checked to see
1123 whether this is a defined type, referring to it if it is, and using
1125 if (TYPE_SYMTAB_ADDRESS (type) != 0)
1126 dbxout_type_index (type);
1128 dbxout_type_index (integer_type_node);
1131 if (TYPE_MIN_VALUE (type) != 0
1132 && host_integerp (TYPE_MIN_VALUE (type), 0))
1134 putc (';', asmfile);
1136 if (print_int_cst_bounds_in_octal_p (type))
1137 print_int_cst_octal (TYPE_MIN_VALUE (type));
1139 print_wide_int (tree_low_cst (TYPE_MIN_VALUE (type), 0));
1143 fprintf (asmfile, ";0");
1147 if (TYPE_MAX_VALUE (type) != 0
1148 && host_integerp (TYPE_MAX_VALUE (type), 0))
1150 putc (';', asmfile);
1152 if (print_int_cst_bounds_in_octal_p (type))
1153 print_int_cst_octal (TYPE_MAX_VALUE (type));
1155 print_wide_int (tree_low_cst (TYPE_MAX_VALUE (type), 0));
1156 putc (';', asmfile);
1161 fprintf (asmfile, ";-1;");
1167 /* Output a reference to a type. If the type has not yet been
1168 described in the dbx output, output its definition now.
1169 For a type already defined, just refer to its definition
1170 using the type number.
1172 If FULL is nonzero, and the type has been described only with
1173 a forward-reference, output the definition now.
1174 If FULL is zero in this case, just refer to the forward-reference
1175 using the number previously allocated. */
1178 dbxout_type (tree type, int full)
1182 static int anonymous_type_number = 0;
1184 if (TREE_CODE (type) == VECTOR_TYPE)
1185 /* The frontend feeds us a representation for the vector as a struct
1186 containing an array. Pull out the array type. */
1187 type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type)));
1189 /* If there was an input error and we don't really have a type,
1190 avoid crashing and write something that is at least valid
1191 by assuming `int'. */
1192 if (type == error_mark_node)
1193 type = integer_type_node;
1196 if (TYPE_NAME (type)
1197 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1198 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type)))
1202 /* Try to find the "main variant" with the same name. */
1203 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1204 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
1205 main_variant = TREE_TYPE (TYPE_NAME (type));
1207 main_variant = TYPE_MAIN_VARIANT (type);
1209 /* If we are not using extensions, stabs does not distinguish const and
1210 volatile, so there is no need to make them separate types. */
1211 if (!use_gnu_debug_info_extensions)
1212 type = main_variant;
1214 if (TYPE_SYMTAB_ADDRESS (type) == 0)
1216 /* Type has no dbx number assigned. Assign next available number. */
1217 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
1219 /* Make sure type vector is long enough to record about this type. */
1221 if (next_type_number == typevec_len)
1224 = ggc_realloc (typevec, (typevec_len * 2 * sizeof typevec[0]));
1225 memset (typevec + typevec_len, 0, typevec_len * sizeof typevec[0]);
1229 #ifdef DBX_USE_BINCL
1230 emit_pending_bincls_if_required ();
1231 typevec[TYPE_SYMTAB_ADDRESS (type)].file_number
1232 = current_file->file_number;
1233 typevec[TYPE_SYMTAB_ADDRESS (type)].type_number
1234 = current_file->next_type_number++;
1238 if (flag_debug_only_used_symbols)
1240 if ((TREE_CODE (type) == RECORD_TYPE
1241 || TREE_CODE (type) == UNION_TYPE
1242 || TREE_CODE (type) == QUAL_UNION_TYPE
1243 || TREE_CODE (type) == ENUMERAL_TYPE)
1244 && TYPE_STUB_DECL (type)
1245 && TREE_CODE_CLASS (TREE_CODE (TYPE_STUB_DECL (type))) == 'd'
1246 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type)))
1247 debug_queue_symbol (TYPE_STUB_DECL (type));
1248 else if (TYPE_NAME (type)
1249 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1250 debug_queue_symbol (TYPE_NAME (type));
1253 /* Output the number of this type, to refer to it. */
1254 dbxout_type_index (type);
1256 #ifdef DBX_TYPE_DEFINED
1257 if (DBX_TYPE_DEFINED (type))
1261 /* If this type's definition has been output or is now being output,
1264 switch (typevec[TYPE_SYMTAB_ADDRESS (type)].status)
1269 /* If we have already had a cross reference,
1270 and either that's all we want or that's the best we could do,
1271 don't repeat the cross reference.
1272 Sun dbx crashes if we do. */
1273 if (! full || !COMPLETE_TYPE_P (type)
1274 /* No way in DBX fmt to describe a variable size. */
1275 || ! host_integerp (TYPE_SIZE (type), 1))
1283 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1284 leave the type-number completely undefined rather than output
1285 a cross-reference. If we have already used GNU debug info extensions,
1286 then it is OK to output a cross reference. This is necessary to get
1287 proper C++ debug output. */
1288 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
1289 || TREE_CODE (type) == QUAL_UNION_TYPE
1290 || TREE_CODE (type) == ENUMERAL_TYPE)
1291 && ! use_gnu_debug_info_extensions)
1292 /* We must use the same test here as we use twice below when deciding
1293 whether to emit a cross-reference. */
1294 if ((TYPE_NAME (type) != 0
1295 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1296 && DECL_IGNORED_P (TYPE_NAME (type)))
1298 || !COMPLETE_TYPE_P (type)
1299 /* No way in DBX fmt to describe a variable size. */
1300 || ! host_integerp (TYPE_SIZE (type), 1))
1302 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1307 /* Output a definition now. */
1309 fprintf (asmfile, "=");
1312 /* Mark it as defined, so that if it is self-referent
1313 we will not get into an infinite recursion of definitions. */
1315 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_DEFINED;
1317 /* If this type is a variant of some other, hand off. Types with
1318 different names are usefully distinguished. We only distinguish
1319 cv-qualified types if we're using extensions. */
1320 if (TYPE_READONLY (type) > TYPE_READONLY (main_variant))
1322 putc ('k', asmfile);
1324 dbxout_type (build_type_variant (type, 0, TYPE_VOLATILE (type)), 0);
1327 else if (TYPE_VOLATILE (type) > TYPE_VOLATILE (main_variant))
1329 putc ('B', asmfile);
1331 dbxout_type (build_type_variant (type, TYPE_READONLY (type), 0), 0);
1334 else if (main_variant != TYPE_MAIN_VARIANT (type))
1336 if (flag_debug_only_used_symbols)
1338 tree orig_type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
1340 if ((TREE_CODE (orig_type) == RECORD_TYPE
1341 || TREE_CODE (orig_type) == UNION_TYPE
1342 || TREE_CODE (orig_type) == QUAL_UNION_TYPE
1343 || TREE_CODE (orig_type) == ENUMERAL_TYPE)
1344 && TYPE_STUB_DECL (orig_type)
1345 && ! DECL_IGNORED_P (TYPE_STUB_DECL (orig_type)))
1346 debug_queue_symbol (TYPE_STUB_DECL (orig_type));
1348 /* 'type' is a typedef; output the type it refers to. */
1349 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type)), 0);
1352 /* else continue. */
1354 switch (TREE_CODE (type))
1358 /* For a void type, just define it as itself; ie, "5=5".
1359 This makes us consider it defined
1360 without saying what it is. The debugger will make it
1361 a void type when the reference is seen, and nothing will
1362 ever override that default. */
1363 dbxout_type_index (type);
1367 if (type == char_type_node && ! TREE_UNSIGNED (type))
1369 /* Output the type `char' as a subrange of itself!
1370 I don't understand this definition, just copied it
1371 from the output of pcc.
1372 This used to use `r2' explicitly and we used to
1373 take care to make sure that `char' was type number 2. */
1374 fprintf (asmfile, "r");
1376 dbxout_type_index (type);
1377 fprintf (asmfile, ";0;127;");
1381 /* If this is a subtype of another integer type, always prefer to
1382 write it as a subtype. */
1383 else if (TREE_TYPE (type) != 0
1384 && TREE_CODE (TREE_TYPE (type)) == INTEGER_TYPE)
1386 /* If the size is non-standard, say what it is if we can use
1389 if (use_gnu_debug_info_extensions
1390 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1392 have_used_extensions = 1;
1393 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1397 dbxout_range_type (type);
1402 /* If the size is non-standard, say what it is if we can use
1405 if (use_gnu_debug_info_extensions
1406 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1408 have_used_extensions = 1;
1409 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1413 if (print_int_cst_bounds_in_octal_p (type))
1415 fprintf (asmfile, "r");
1418 /* If this type derives from another type, output type index of
1419 parent type. This is particularly important when parent type
1420 is an enumerated type, because not generating the parent type
1421 index would transform the definition of this enumerated type
1422 into a plain unsigned type. */
1423 if (TREE_TYPE (type) != 0)
1424 dbxout_type_index (TREE_TYPE (type));
1426 dbxout_type_index (type);
1428 fprintf (asmfile, ";");
1430 print_int_cst_octal (TYPE_MIN_VALUE (type));
1431 fprintf (asmfile, ";");
1433 print_int_cst_octal (TYPE_MAX_VALUE (type));
1434 fprintf (asmfile, ";");
1439 /* Output other integer types as subranges of `int'. */
1440 dbxout_range_type (type);
1446 /* This used to say `r1' and we used to take care
1447 to make sure that `int' was type number 1. */
1448 fprintf (asmfile, "r");
1450 dbxout_type_index (integer_type_node);
1451 putc (';', asmfile);
1453 print_wide_int (int_size_in_bytes (type));
1454 fputs (";0;", asmfile);
1459 if (use_gnu_debug_info_extensions)
1461 have_used_extensions = 1;
1462 fputs ("@s", asmfile);
1464 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1465 fputs (";-20;", asmfile);
1470 /* Output the type `char' as a subrange of itself.
1471 That is what pcc seems to do. */
1472 fprintf (asmfile, "r");
1474 dbxout_type_index (char_type_node);
1475 fprintf (asmfile, ";0;%d;", TREE_UNSIGNED (type) ? 255 : 127);
1481 if (use_gnu_debug_info_extensions)
1483 have_used_extensions = 1;
1484 fputs ("@s", asmfile);
1486 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1487 fputs (";-16;", asmfile);
1490 else /* Define as enumeral type (False, True) */
1492 fprintf (asmfile, "eFalse:0,True:1,;");
1498 putc ('d', asmfile);
1500 dbxout_type (TREE_TYPE (type), 0);
1504 /* Differs from the REAL_TYPE by its new data type number.
1505 R3 is NF_COMPLEX. We don't try to use any of the other NF_*
1506 codes since gdb doesn't care anyway. */
1508 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1510 fputs ("R3;", asmfile);
1512 print_wide_int (2 * int_size_in_bytes (TREE_TYPE (type)));
1513 fputs (";0;", asmfile);
1518 /* Output a complex integer type as a structure,
1519 pending some other way to do it. */
1520 putc ('s', asmfile);
1522 print_wide_int (int_size_in_bytes (type));
1523 fprintf (asmfile, "real:");
1526 dbxout_type (TREE_TYPE (type), 0);
1527 fprintf (asmfile, ",0,%d;", TYPE_PRECISION (TREE_TYPE (type)));
1529 fprintf (asmfile, "imag:");
1531 dbxout_type (TREE_TYPE (type), 0);
1532 fprintf (asmfile, ",%d,%d;;", TYPE_PRECISION (TREE_TYPE (type)),
1533 TYPE_PRECISION (TREE_TYPE (type)));
1539 if (use_gnu_debug_info_extensions)
1541 have_used_extensions = 1;
1542 fputs ("@s", asmfile);
1544 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1545 putc (';', asmfile);
1548 /* Check if a bitstring type, which in Chill is
1549 different from a [power]set. */
1550 if (TYPE_STRING_FLAG (type))
1552 fprintf (asmfile, "@S;");
1556 putc ('S', asmfile);
1558 dbxout_type (TYPE_DOMAIN (type), 0);
1562 /* Make arrays of packed bits look like bitstrings for chill. */
1563 if (TYPE_PACKED (type) && use_gnu_debug_info_extensions)
1565 have_used_extensions = 1;
1566 fputs ("@s", asmfile);
1568 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1569 fprintf (asmfile, ";@S;S");
1571 dbxout_type (TYPE_DOMAIN (type), 0);
1575 /* Output "a" followed by a range type definition
1576 for the index type of the array
1577 followed by a reference to the target-type.
1578 ar1;0;N;M for a C array of type M and size N+1. */
1579 /* Check if a character string type, which in Chill is
1580 different from an array of characters. */
1581 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1583 have_used_extensions = 1;
1584 fprintf (asmfile, "@S;");
1587 tem = TYPE_DOMAIN (type);
1590 fprintf (asmfile, "ar");
1592 dbxout_type_index (integer_type_node);
1593 fprintf (asmfile, ";0;-1;");
1598 fprintf (asmfile, "a");
1600 dbxout_range_type (tem);
1603 dbxout_type (TREE_TYPE (type), 0);
1608 case QUAL_UNION_TYPE:
1610 int i, n_baseclasses = 0;
1612 if (TYPE_BINFO (type) != 0
1613 && TREE_CODE (TYPE_BINFO (type)) == TREE_VEC
1614 && TYPE_BINFO_BASETYPES (type) != 0)
1615 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1617 /* Output a structure type. We must use the same test here as we
1618 use in the DBX_NO_XREFS case above. */
1619 if ((TYPE_NAME (type) != 0
1620 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1621 && DECL_IGNORED_P (TYPE_NAME (type)))
1623 || !COMPLETE_TYPE_P (type)
1624 /* No way in DBX fmt to describe a variable size. */
1625 || ! host_integerp (TYPE_SIZE (type), 1))
1627 /* If the type is just a cross reference, output one
1628 and mark the type as partially described.
1629 If it later becomes defined, we will output
1630 its real definition.
1631 If the type has a name, don't nest its definition within
1632 another type's definition; instead, output an xref
1633 and let the definition come when the name is defined. */
1634 fputs ((TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu", asmfile);
1636 #if 0 /* This assertion is legitimately false in C++. */
1637 /* We shouldn't be outputting a reference to a type before its
1638 definition unless the type has a tag name.
1639 A typedef name without a tag name should be impossible. */
1640 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1643 if (TYPE_NAME (type) != 0)
1644 dbxout_type_name (type);
1647 fprintf (asmfile, "$$%d", anonymous_type_number++);
1651 fprintf (asmfile, ":");
1653 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1657 /* Identify record or union, and print its size. */
1658 putc (((TREE_CODE (type) == RECORD_TYPE) ? 's' : 'u'), asmfile);
1660 print_wide_int (int_size_in_bytes (type));
1662 if (use_gnu_debug_info_extensions)
1666 have_used_extensions = 1;
1667 fprintf (asmfile, "!%d,", n_baseclasses);
1671 for (i = 0; i < n_baseclasses; i++)
1673 tree binfo = TYPE_BINFO (type);
1674 tree child = BINFO_BASETYPE (binfo, i);
1675 tree access = (BINFO_BASEACCESSES (binfo)
1676 ? BINFO_BASEACCESS (binfo, i) : access_public_node);
1678 if (use_gnu_debug_info_extensions)
1680 have_used_extensions = 1;
1681 putc (TREE_VIA_VIRTUAL (child) ? '1' : '0', asmfile);
1682 putc (access == access_public_node ? '2' :
1683 (access == access_protected_node ? '1' :'0'),
1686 if (TREE_VIA_VIRTUAL (child)
1687 && strcmp (lang_hooks.name, "GNU C++") == 0)
1688 /* For a virtual base, print the (negative) offset within
1689 the vtable where we must look to find the necessary
1691 print_wide_int (tree_low_cst (BINFO_VPTR_FIELD (child), 0)
1694 print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0)
1696 putc (',', asmfile);
1698 dbxout_type (BINFO_TYPE (child), 0);
1699 putc (';', asmfile);
1704 /* Print out the base class information with fields
1705 which have the same names at the types they hold. */
1706 dbxout_type_name (BINFO_TYPE (child));
1707 putc (':', asmfile);
1709 dbxout_type (BINFO_TYPE (child), full);
1710 putc (',', asmfile);
1712 print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0)
1714 putc (',', asmfile);
1716 print_wide_int (tree_low_cst (TYPE_SIZE (BINFO_TYPE (child)),
1719 putc (';', asmfile);
1725 /* Write out the field declarations. */
1726 dbxout_type_fields (type);
1727 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1729 have_used_extensions = 1;
1730 dbxout_type_methods (type);
1733 putc (';', asmfile);
1736 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1737 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1738 && TYPE_VFIELD (type))
1740 have_used_extensions = 1;
1742 /* Tell GDB+ that it may keep reading. */
1743 putc ('~', asmfile);
1746 /* We need to write out info about what field this class
1747 uses as its "main" vtable pointer field, because if this
1748 field is inherited from a base class, GDB cannot necessarily
1749 figure out which field it's using in time. */
1750 if (TYPE_VFIELD (type))
1752 putc ('%', asmfile);
1754 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0);
1757 putc (';', asmfile);
1763 /* We must use the same test here as we use in the DBX_NO_XREFS case
1764 above. We simplify it a bit since an enum will never have a variable
1766 if ((TYPE_NAME (type) != 0
1767 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1768 && DECL_IGNORED_P (TYPE_NAME (type)))
1770 || !COMPLETE_TYPE_P (type))
1772 fprintf (asmfile, "xe");
1774 dbxout_type_name (type);
1775 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1776 putc (':', asmfile);
1780 if (use_gnu_debug_info_extensions
1781 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1783 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1787 putc ('e', asmfile);
1789 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1791 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1792 CHARS (IDENTIFIER_LENGTH (TREE_PURPOSE (tem)) + 1);
1793 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1794 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1795 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1796 && (HOST_WIDE_INT) TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1797 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1799 print_int_cst_octal (TREE_VALUE (tem));
1801 putc (',', asmfile);
1803 if (TREE_CHAIN (tem) != 0)
1807 putc (';', asmfile);
1812 putc ('*', asmfile);
1814 dbxout_type (TREE_TYPE (type), 0);
1818 if (use_gnu_debug_info_extensions)
1820 have_used_extensions = 1;
1821 putc ('#', asmfile);
1824 /* Write the argument types out longhand. */
1825 dbxout_type (TYPE_METHOD_BASETYPE (type), 0);
1826 putc (',', asmfile);
1828 dbxout_type (TREE_TYPE (type), 0);
1829 dbxout_args (TYPE_ARG_TYPES (type));
1830 putc (';', asmfile);
1834 /* Treat it as a function type. */
1835 dbxout_type (TREE_TYPE (type), 0);
1839 if (use_gnu_debug_info_extensions)
1841 have_used_extensions = 1;
1842 putc ('@', asmfile);
1844 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0);
1845 putc (',', asmfile);
1847 dbxout_type (TREE_TYPE (type), 0);
1850 /* Should print as an int, because it is really just an offset. */
1851 dbxout_type (integer_type_node, 0);
1854 case REFERENCE_TYPE:
1855 if (use_gnu_debug_info_extensions)
1856 have_used_extensions = 1;
1857 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1859 dbxout_type (TREE_TYPE (type), 0);
1863 putc ('f', asmfile);
1865 dbxout_type (TREE_TYPE (type), 0);
1873 /* Return nonzero if the given type represents an integer whose bounds
1874 should be printed in octal format. */
1877 print_int_cst_bounds_in_octal_p (tree type)
1879 /* If we can use GDB extensions and the size is wider than a long
1880 (the size used by GDB to read them) or we may have trouble writing
1881 the bounds the usual way, write them in octal. Note the test is for
1882 the *target's* size of "long", not that of the host. The host test
1883 is just to make sure we can write it out in case the host wide int
1884 is narrower than the target "long".
1886 For unsigned types, we use octal if they are the same size or larger.
1887 This is because we print the bounds as signed decimal, and hence they
1888 can't span same size unsigned types. */
1890 if (use_gnu_debug_info_extensions
1891 && TYPE_MIN_VALUE (type) != 0
1892 && TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST
1893 && TYPE_MAX_VALUE (type) != 0
1894 && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST
1895 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1896 || ((TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node))
1897 && TREE_UNSIGNED (type))
1898 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT
1899 || (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT
1900 && TREE_UNSIGNED (type))))
1906 /* Print the value of integer constant C, in octal,
1907 handling double precision. */
1910 print_int_cst_octal (tree c)
1912 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1913 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1914 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1915 unsigned int width = TYPE_PRECISION (TREE_TYPE (c));
1917 /* GDB wants constants with no extra leading "1" bits, so
1918 we need to remove any sign-extension that might be
1920 if (width == HOST_BITS_PER_WIDE_INT * 2)
1922 else if (width > HOST_BITS_PER_WIDE_INT)
1923 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1924 else if (width == HOST_BITS_PER_WIDE_INT)
1927 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1929 fprintf (asmfile, "0");
1934 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1935 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1939 unsigned HOST_WIDE_INT beg = high >> excess;
1940 unsigned HOST_WIDE_INT middle
1941 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1942 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1943 unsigned HOST_WIDE_INT end
1944 = low & (((unsigned HOST_WIDE_INT) 1
1945 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1948 fprintf (asmfile, "%o%01o", (int) beg, (int) middle);
1950 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1955 print_octal (unsigned HOST_WIDE_INT value, int digits)
1959 for (i = digits - 1; i >= 0; i--)
1960 fprintf (asmfile, "%01o", (int) ((value >> (3 * i)) & 7));
1965 /* Output C in decimal while adjusting the number of digits written. */
1968 print_wide_int (HOST_WIDE_INT c)
1972 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC, c);
1983 /* Output the name of type TYPE, with no punctuation.
1984 Such names can be set up either by typedef declarations
1985 or by struct, enum and union tags. */
1988 dbxout_type_name (tree type)
1991 if (TYPE_NAME (type) == 0)
1993 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1995 t = TYPE_NAME (type);
1997 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1999 t = DECL_NAME (TYPE_NAME (type));
2004 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
2005 CHARS (IDENTIFIER_LENGTH (t));
2008 /* Output leading leading struct or class names needed for qualifying
2009 type whose scope is limited to a struct or class. */
2012 dbxout_class_name_qualifiers (tree decl)
2014 tree context = decl_type_context (decl);
2016 if (context != NULL_TREE
2017 && TREE_CODE(context) == RECORD_TYPE
2018 && TYPE_NAME (context) != 0
2019 && (TREE_CODE (TYPE_NAME (context)) == IDENTIFIER_NODE
2020 || (DECL_NAME (TYPE_NAME (context)) != 0)))
2022 tree name = TYPE_NAME (context);
2024 emit_pending_bincls_if_required ();
2026 if (TREE_CODE (name) == TYPE_DECL)
2028 dbxout_class_name_qualifiers (name);
2029 name = DECL_NAME (name);
2031 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
2032 CHARS (IDENTIFIER_LENGTH (name) + 2);
2036 /* Output a .stabs for the symbol defined by DECL,
2037 which must be a ..._DECL node in the normal namespace.
2038 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
2039 LOCAL is nonzero if the scope is less than the entire file.
2040 Return 1 if a stabs might have been emitted. */
2043 dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED)
2045 tree type = TREE_TYPE (decl);
2046 tree context = NULL_TREE;
2049 /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */
2052 /* Ignore nameless syms, but don't ignore type tags. */
2054 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
2055 || DECL_IGNORED_P (decl))
2056 DBXOUT_DECR_NESTING_AND_RETURN (0);
2058 /* If we are to generate only the symbols actually used then such
2059 symbol nodees are flagged with TREE_USED. Ignore any that
2060 aren't flaged as TREE_USED. */
2062 if (flag_debug_only_used_symbols)
2066 if (!TREE_USED (decl)
2067 && (TREE_CODE (decl) != VAR_DECL || !DECL_INITIAL (decl)))
2068 DBXOUT_DECR_NESTING_AND_RETURN (0);
2070 /* We now have a used symbol. We need to generate the info for
2071 the symbol's type in addition to the symbol itself. These
2072 type symbols are queued to be generated after were done with
2073 the symbol itself (done because the symbol's info is generated
2074 with fprintf's, etc. as it determines what's needed).
2076 Note, because the TREE_TYPE(type) might be something like a
2077 pointer to a named type we need to look for the first name
2078 we see following the TREE_TYPE chain. */
2081 while (POINTER_TYPE_P (t))
2084 /* RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, and ENUMERAL_TYPE
2085 need special treatment. The TYPE_STUB_DECL field in these
2086 types generally represents the tag name type we want to
2087 output. In addition there could be a typedef type with
2088 a different name. In that case we also want to output
2091 if ((TREE_CODE (t) == RECORD_TYPE
2092 || TREE_CODE (t) == UNION_TYPE
2093 || TREE_CODE (t) == QUAL_UNION_TYPE
2094 || TREE_CODE (t) == ENUMERAL_TYPE)
2095 && TYPE_STUB_DECL (t)
2096 && TYPE_STUB_DECL (t) != decl
2097 && TREE_CODE_CLASS (TREE_CODE (TYPE_STUB_DECL (t))) == 'd'
2098 && ! DECL_IGNORED_P (TYPE_STUB_DECL (t)))
2100 debug_queue_symbol (TYPE_STUB_DECL (t));
2102 && TYPE_NAME (t) != TYPE_STUB_DECL (t)
2103 && TYPE_NAME (t) != decl
2104 && TREE_CODE_CLASS (TREE_CODE (TYPE_NAME (t))) == 'd')
2105 debug_queue_symbol (TYPE_NAME (t));
2107 else if (TYPE_NAME (t)
2108 && TYPE_NAME (t) != decl
2109 && TREE_CODE_CLASS (TREE_CODE (TYPE_NAME (t))) == 'd')
2110 debug_queue_symbol (TYPE_NAME (t));
2113 emit_pending_bincls_if_required ();
2115 dbxout_prepare_symbol (decl);
2117 /* The output will always start with the symbol name,
2118 so always count that in the length-output-so-far. */
2120 if (DECL_NAME (decl) != 0)
2121 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
2123 switch (TREE_CODE (decl))
2126 /* Enum values are defined by defining the enum type. */
2130 if (DECL_RTL (decl) == 0)
2131 DBXOUT_DECR_NESTING_AND_RETURN (0);
2132 if (DECL_EXTERNAL (decl))
2134 /* Don't mention a nested function under its parent. */
2135 context = decl_function_context (decl);
2136 if (context == current_function_decl)
2138 if (GET_CODE (DECL_RTL (decl)) != MEM
2139 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
2143 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2144 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
2145 TREE_PUBLIC (decl) ? 'F' : 'f');
2148 current_sym_code = N_FUN;
2149 current_sym_addr = XEXP (DECL_RTL (decl), 0);
2151 if (TREE_TYPE (type))
2152 dbxout_type (TREE_TYPE (type), 0);
2154 dbxout_type (void_type_node, 0);
2156 /* For a nested function, when that function is compiled,
2157 mention the containing function name
2158 as well as (since dbx wants it) our own assembler-name. */
2160 fprintf (asmfile, ",%s,%s",
2161 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
2162 IDENTIFIER_POINTER (DECL_NAME (context)));
2164 dbxout_finish_symbol (decl);
2168 /* Don't output the same typedef twice.
2169 And don't output what language-specific stuff doesn't want output. */
2170 if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl))
2171 DBXOUT_DECR_NESTING_AND_RETURN (0);
2179 if (DECL_NAME (decl))
2181 /* Nonzero means we must output a tag as well as a typedef. */
2184 /* Handle the case of a C++ structure or union
2185 where the TYPE_NAME is a TYPE_DECL
2186 which gives both a typedef name and a tag. */
2187 /* dbx requires the tag first and the typedef second. */
2188 if ((TREE_CODE (type) == RECORD_TYPE
2189 || TREE_CODE (type) == UNION_TYPE
2190 || TREE_CODE (type) == QUAL_UNION_TYPE)
2191 && TYPE_NAME (type) == decl
2192 && !(use_gnu_debug_info_extensions && have_used_extensions)
2193 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
2194 /* Distinguish the implicit typedefs of C++
2195 from explicit ones that might be found in C. */
2196 && DECL_ARTIFICIAL (decl)
2197 /* Do not generate a tag for incomplete records. */
2198 && COMPLETE_TYPE_P (type)
2199 /* Do not generate a tag for records of variable size,
2200 since this type can not be properly described in the
2201 DBX format, and it confuses some tools such as objdump. */
2202 && host_integerp (TYPE_SIZE (type), 1))
2204 tree name = TYPE_NAME (type);
2205 if (TREE_CODE (name) == TYPE_DECL)
2206 name = DECL_NAME (name);
2208 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2209 current_sym_value = 0;
2210 current_sym_addr = 0;
2211 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
2213 fprintf (asmfile, "%s\"%s:T", ASM_STABS_OP,
2214 IDENTIFIER_POINTER (name));
2215 dbxout_type (type, 1);
2216 dbxout_finish_symbol (NULL_TREE);
2219 /* Output .stabs (or whatever) and leading double quote. */
2220 fprintf (asmfile, "%s\"", ASM_STABS_OP);
2222 if (use_gnu_debug_info_extensions)
2224 /* Output leading class/struct qualifiers. */
2225 dbxout_class_name_qualifiers (decl);
2228 /* Output typedef name. */
2229 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (decl)));
2231 /* Short cut way to output a tag also. */
2232 if ((TREE_CODE (type) == RECORD_TYPE
2233 || TREE_CODE (type) == UNION_TYPE
2234 || TREE_CODE (type) == QUAL_UNION_TYPE)
2235 && TYPE_NAME (type) == decl
2236 /* Distinguish the implicit typedefs of C++
2237 from explicit ones that might be found in C. */
2238 && DECL_ARTIFICIAL (decl))
2240 if (use_gnu_debug_info_extensions && have_used_extensions)
2242 putc ('T', asmfile);
2243 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
2245 #if 0 /* Now we generate the tag for this case up above. */
2251 putc ('t', asmfile);
2252 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2254 dbxout_type (type, 1);
2255 dbxout_finish_symbol (decl);
2259 /* Don't output a tag if this is an incomplete type. This prevents
2260 the sun4 Sun OS 4.x dbx from crashing. */
2262 if (tag_needed && TYPE_NAME (type) != 0
2263 && (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE
2264 || (DECL_NAME (TYPE_NAME (type)) != 0))
2265 && COMPLETE_TYPE_P (type)
2266 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
2268 /* For a TYPE_DECL with no name, but the type has a name,
2270 This is what represents `struct foo' with no typedef. */
2271 /* In C++, the name of a type is the corresponding typedef.
2272 In C, it is an IDENTIFIER_NODE. */
2273 tree name = TYPE_NAME (type);
2274 if (TREE_CODE (name) == TYPE_DECL)
2275 name = DECL_NAME (name);
2277 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2278 current_sym_value = 0;
2279 current_sym_addr = 0;
2280 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
2282 fprintf (asmfile, "%s\"%s:T", ASM_STABS_OP,
2283 IDENTIFIER_POINTER (name));
2284 dbxout_type (type, 1);
2285 dbxout_finish_symbol (NULL_TREE);
2289 /* If an enum type has no name, it cannot be referred to,
2290 but we must output it anyway, since the enumeration constants
2291 can be referred to. */
2292 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
2294 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2295 current_sym_value = 0;
2296 current_sym_addr = 0;
2297 current_sym_nchars = 2;
2299 /* Some debuggers fail when given NULL names, so give this a
2300 harmless name of ` '. */
2301 fprintf (asmfile, "%s\" :T", ASM_STABS_OP);
2302 dbxout_type (type, 1);
2303 dbxout_finish_symbol (NULL_TREE);
2306 /* Prevent duplicate output of a typedef. */
2307 TREE_ASM_WRITTEN (decl) = 1;
2312 /* Parm decls go in their own separate chains
2313 and are output by dbxout_reg_parms and dbxout_parms. */
2317 /* Named return value, treat like a VAR_DECL. */
2319 if (! DECL_RTL_SET_P (decl))
2320 DBXOUT_DECR_NESTING_AND_RETURN (0);
2321 /* Don't mention a variable that is external.
2322 Let the file that defines it describe it. */
2323 if (DECL_EXTERNAL (decl))
2326 /* If the variable is really a constant
2327 and not written in memory, inform the debugger. */
2328 if (TREE_STATIC (decl) && TREE_READONLY (decl)
2329 && DECL_INITIAL (decl) != 0
2330 && host_integerp (DECL_INITIAL (decl), 0)
2331 && ! TREE_ASM_WRITTEN (decl)
2332 && (DECL_CONTEXT (decl) == NULL_TREE
2333 || TREE_CODE (DECL_CONTEXT (decl)) == BLOCK))
2335 if (TREE_PUBLIC (decl) == 0)
2337 /* The sun4 assembler does not grok this. */
2338 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
2340 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
2341 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
2343 HOST_WIDE_INT ival = tree_low_cst (DECL_INITIAL (decl), 0);
2344 fprintf (asmfile, "%s\"%s:c=i" HOST_WIDE_INT_PRINT_DEC
2346 ASM_STABS_OP, name, ival, N_LSYM);
2347 DBXOUT_DECR_NESTING;
2350 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
2352 /* don't know how to do this yet. */
2356 /* else it is something we handle like a normal variable. */
2359 SET_DECL_RTL (decl, eliminate_regs (DECL_RTL (decl), 0, NULL_RTX));
2360 #ifdef LEAF_REG_REMAP
2361 if (current_function_uses_only_leaf_regs)
2362 leaf_renumber_regs_insn (DECL_RTL (decl));
2365 result = dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
2371 DBXOUT_DECR_NESTING;
2375 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
2376 Add SUFFIX to its name, if SUFFIX is not 0.
2377 Describe the variable as residing in HOME
2378 (usually HOME is DECL_RTL (DECL), but not always).
2379 Returns 1 if the stab was really emitted. */
2382 dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home)
2387 emit_pending_bincls_if_required ();
2389 /* Don't mention a variable at all
2390 if it was completely optimized into nothingness.
2392 If the decl was from an inline function, then its rtl
2393 is not identically the rtl that was used in this
2394 particular compilation. */
2395 if (GET_CODE (home) == SUBREG)
2399 while (GET_CODE (value) == SUBREG)
2400 value = SUBREG_REG (value);
2401 if (GET_CODE (value) == REG)
2403 if (REGNO (value) >= FIRST_PSEUDO_REGISTER)
2406 home = alter_subreg (&home);
2408 if (GET_CODE (home) == REG)
2410 regno = REGNO (home);
2411 if (regno >= FIRST_PSEUDO_REGISTER)
2415 /* The kind-of-variable letter depends on where
2416 the variable is and on the scope of its name:
2417 G and N_GSYM for static storage and global scope,
2418 S for static storage and file scope,
2419 V for static storage and local scope,
2420 for those two, use N_LCSYM if data is in bss segment,
2421 N_STSYM if in data segment, N_FUN otherwise.
2422 (We used N_FUN originally, then changed to N_STSYM
2423 to please GDB. However, it seems that confused ld.
2424 Now GDB has been fixed to like N_FUN, says Kingdon.)
2425 no letter at all, and N_LSYM, for auto variable,
2426 r and N_RSYM for register variable. */
2428 if (GET_CODE (home) == MEM
2429 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
2431 if (TREE_PUBLIC (decl))
2434 current_sym_code = N_GSYM;
2438 current_sym_addr = XEXP (home, 0);
2440 letter = decl_function_context (decl) ? 'V' : 'S';
2442 /* This should be the same condition as in assemble_variable, but
2443 we don't have access to dont_output_data here. So, instead,
2444 we rely on the fact that error_mark_node initializers always
2445 end up in bss for C++ and never end up in bss for C. */
2446 if (DECL_INITIAL (decl) == 0
2447 || (!strcmp (lang_hooks.name, "GNU C++")
2448 && DECL_INITIAL (decl) == error_mark_node))
2449 current_sym_code = N_LCSYM;
2450 else if (DECL_IN_TEXT_SECTION (decl))
2451 /* This is not quite right, but it's the closest
2452 of all the codes that Unix defines. */
2453 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
2456 /* Some ports can transform a symbol ref into a label ref,
2457 because the symbol ref is too far away and has to be
2458 dumped into a constant pool. Alternatively, the symbol
2459 in the constant pool might be referenced by a different
2461 if (GET_CODE (current_sym_addr) == SYMBOL_REF
2462 && CONSTANT_POOL_ADDRESS_P (current_sym_addr))
2464 rtx tmp = get_pool_constant (current_sym_addr);
2466 if (GET_CODE (tmp) == SYMBOL_REF
2467 || GET_CODE (tmp) == LABEL_REF)
2468 current_sym_addr = tmp;
2471 /* Ultrix `as' seems to need this. */
2472 #ifdef DBX_STATIC_STAB_DATA_SECTION
2475 current_sym_code = N_STSYM;
2479 else if (regno >= 0)
2482 current_sym_code = N_RSYM;
2483 current_sym_value = DBX_REGISTER_NUMBER (regno);
2485 else if (GET_CODE (home) == MEM
2486 && (GET_CODE (XEXP (home, 0)) == MEM
2487 || (GET_CODE (XEXP (home, 0)) == REG
2488 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM
2489 && REGNO (XEXP (home, 0)) != STACK_POINTER_REGNUM
2490 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2491 && REGNO (XEXP (home, 0)) != ARG_POINTER_REGNUM
2494 /* If the value is indirect by memory or by a register
2495 that isn't the frame pointer
2496 then it means the object is variable-sized and address through
2497 that register or stack slot. DBX has no way to represent this
2498 so all we can do is output the variable as a pointer.
2499 If it's not a parameter, ignore it.
2500 (VAR_DECLs like this can be made by integrate.c.) */
2502 if (GET_CODE (XEXP (home, 0)) == REG)
2505 current_sym_code = N_RSYM;
2506 if (REGNO (XEXP (home, 0)) >= FIRST_PSEUDO_REGISTER)
2508 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
2512 current_sym_code = N_LSYM;
2513 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2514 We want the value of that CONST_INT. */
2516 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
2519 /* Effectively do build_pointer_type, but don't cache this type,
2520 since it might be temporary whereas the type it points to
2521 might have been saved for inlining. */
2522 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2523 type = make_node (POINTER_TYPE);
2524 TREE_TYPE (type) = TREE_TYPE (decl);
2526 else if (GET_CODE (home) == MEM
2527 && GET_CODE (XEXP (home, 0)) == REG)
2529 current_sym_code = N_LSYM;
2530 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2532 else if (GET_CODE (home) == MEM
2533 && GET_CODE (XEXP (home, 0)) == PLUS
2534 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
2536 current_sym_code = N_LSYM;
2537 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2538 We want the value of that CONST_INT. */
2539 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2541 else if (GET_CODE (home) == MEM
2542 && GET_CODE (XEXP (home, 0)) == CONST)
2544 /* Handle an obscure case which can arise when optimizing and
2545 when there are few available registers. (This is *always*
2546 the case for i386/i486 targets). The RTL looks like
2547 (MEM (CONST ...)) even though this variable is a local `auto'
2548 or a local `register' variable. In effect, what has happened
2549 is that the reload pass has seen that all assignments and
2550 references for one such a local variable can be replaced by
2551 equivalent assignments and references to some static storage
2552 variable, thereby avoiding the need for a register. In such
2553 cases we're forced to lie to debuggers and tell them that
2554 this variable was itself `static'. */
2555 current_sym_code = N_LCSYM;
2557 current_sym_addr = XEXP (XEXP (home, 0), 0);
2559 else if (GET_CODE (home) == CONCAT)
2563 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE,
2564 for example), then there is no easy way to figure out
2565 what SUBTYPE should be. So, we give up. */
2566 if (TREE_CODE (type) != COMPLEX_TYPE)
2569 subtype = TREE_TYPE (type);
2571 /* If the variable's storage is in two parts,
2572 output each as a separate stab with a modified name. */
2573 if (WORDS_BIG_ENDIAN)
2574 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
2576 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
2578 dbxout_prepare_symbol (decl);
2580 if (WORDS_BIG_ENDIAN)
2581 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
2583 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
2587 /* Address might be a MEM, when DECL is a variable-sized object.
2588 Or it might be const0_rtx, meaning previous passes
2589 want us to ignore this variable. */
2592 /* Ok, start a symtab entry and output the variable name. */
2595 #ifdef DBX_STATIC_BLOCK_START
2596 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
2599 dbxout_symbol_name (decl, suffix, letter);
2600 dbxout_type (type, 0);
2601 dbxout_finish_symbol (decl);
2603 #ifdef DBX_STATIC_BLOCK_END
2604 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
2609 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2610 Then output LETTER to indicate the kind of location the symbol has. */
2613 dbxout_symbol_name (tree decl, const char *suffix, int letter)
2617 if (DECL_CONTEXT (decl)
2618 && (TYPE_P (DECL_CONTEXT (decl))
2619 || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL))
2620 /* One slight hitch: if this is a VAR_DECL which is a class member
2621 or a namespace member, we must put out the mangled name instead of the
2622 DECL_NAME. Note also that static member (variable) names DO NOT begin
2623 with underscores in .stabs directives. */
2624 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
2626 /* ...but if we're function-local, we don't want to include the junk
2627 added by ASM_FORMAT_PRIVATE_NAME. */
2628 name = IDENTIFIER_POINTER (DECL_NAME (decl));
2632 fprintf (asmfile, "%s\"%s%s:", ASM_STABS_OP, name,
2633 (suffix ? suffix : ""));
2636 putc (letter, asmfile);
2640 dbxout_prepare_symbol (tree decl ATTRIBUTE_UNUSED)
2643 const char *filename = DECL_SOURCE_FILE (decl);
2645 dbxout_source_file (asmfile, filename);
2648 /* Initialize variables used to communicate each symbol's debug
2649 information to dbxout_finish_symbol with zeroes. */
2651 /* Cast avoids warning in old compilers. */
2652 current_sym_code = (STAB_CODE_TYPE) 0;
2653 current_sym_value = 0;
2654 current_sym_addr = 0;
2658 dbxout_finish_symbol (tree sym)
2660 #ifdef DBX_FINISH_SYMBOL
2661 DBX_FINISH_SYMBOL (sym);
2664 if (use_gnu_debug_info_extensions && sym != 0)
2665 line = DECL_SOURCE_LINE (sym);
2667 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2668 if (current_sym_addr)
2669 output_addr_const (asmfile, current_sym_addr);
2671 fprintf (asmfile, "%d", current_sym_value);
2672 putc ('\n', asmfile);
2676 /* Output definitions of all the decls in a chain. Return nonzero if
2677 anything was output */
2680 dbxout_syms (tree syms)
2685 result += dbxout_symbol (syms, 1);
2686 syms = TREE_CHAIN (syms);
2691 /* The following two functions output definitions of function parameters.
2692 Each parameter gets a definition locating it in the parameter list.
2693 Each parameter that is a register variable gets a second definition
2694 locating it in the register.
2696 Printing or argument lists in gdb uses the definitions that
2697 locate in the parameter list. But reference to the variable in
2698 expressions uses preferentially the definition as a register. */
2700 /* Output definitions, referring to storage in the parmlist,
2701 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2704 dbxout_parms (tree parms)
2708 emit_pending_bincls_if_required ();
2710 for (; parms; parms = TREE_CHAIN (parms))
2711 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2713 dbxout_prepare_symbol (parms);
2715 /* Perform any necessary register eliminations on the parameter's rtl,
2716 so that the debugging output will be accurate. */
2717 DECL_INCOMING_RTL (parms)
2718 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2719 SET_DECL_RTL (parms, eliminate_regs (DECL_RTL (parms), 0, NULL_RTX));
2720 #ifdef LEAF_REG_REMAP
2721 if (current_function_uses_only_leaf_regs)
2723 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2724 leaf_renumber_regs_insn (DECL_RTL (parms));
2728 if (PARM_PASSED_IN_MEMORY (parms))
2730 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2732 /* ??? Here we assume that the parm address is indexed
2733 off the frame pointer or arg pointer.
2734 If that is not true, we produce meaningless results,
2735 but do not crash. */
2736 if (GET_CODE (addr) == PLUS
2737 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2738 current_sym_value = INTVAL (XEXP (addr, 1));
2740 current_sym_value = 0;
2742 current_sym_code = N_PSYM;
2743 current_sym_addr = 0;
2746 if (DECL_NAME (parms))
2748 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2750 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2751 IDENTIFIER_POINTER (DECL_NAME (parms)),
2752 DBX_MEMPARM_STABS_LETTER);
2756 current_sym_nchars = 8;
2757 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2758 DBX_MEMPARM_STABS_LETTER);
2761 /* It is quite tempting to use:
2763 dbxout_type (TREE_TYPE (parms), 0);
2765 as the next statement, rather than using DECL_ARG_TYPE(), so
2766 that gcc reports the actual type of the parameter, rather
2767 than the promoted type. This certainly makes GDB's life
2768 easier, at least for some ports. The change is a bad idea
2769 however, since GDB expects to be able access the type without
2770 performing any conversions. So for example, if we were
2771 passing a float to an unprototyped function, gcc will store a
2772 double on the stack, but if we emit a stab saying the type is a
2773 float, then gdb will only read in a single value, and this will
2774 produce an erroneous value. */
2775 dbxout_type (DECL_ARG_TYPE (parms), 0);
2776 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2777 dbxout_finish_symbol (parms);
2779 else if (GET_CODE (DECL_RTL (parms)) == REG)
2782 char regparm_letter;
2784 /* Parm passed in registers and lives in registers or nowhere. */
2786 current_sym_code = DBX_REGPARM_STABS_CODE;
2787 regparm_letter = DBX_REGPARM_STABS_LETTER;
2788 current_sym_addr = 0;
2790 /* If parm lives in a register, use that register;
2791 pretend the parm was passed there. It would be more consistent
2792 to describe the register where the parm was passed,
2793 but in practice that register usually holds something else.
2795 If we use DECL_RTL, then we must use the declared type of
2796 the variable, not the type that it arrived in. */
2797 if (REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2799 best_rtl = DECL_RTL (parms);
2800 parm_type = TREE_TYPE (parms);
2802 /* If the parm lives nowhere, use the register where it was
2803 passed. It is also better to use the declared type here. */
2806 best_rtl = DECL_INCOMING_RTL (parms);
2807 parm_type = TREE_TYPE (parms);
2809 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2812 if (DECL_NAME (parms))
2814 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2815 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2816 IDENTIFIER_POINTER (DECL_NAME (parms)),
2821 current_sym_nchars = 8;
2822 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2826 dbxout_type (parm_type, 0);
2827 dbxout_finish_symbol (parms);
2829 else if (GET_CODE (DECL_RTL (parms)) == MEM
2830 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2831 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2832 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2833 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2834 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2838 /* Parm was passed via invisible reference.
2839 That is, its address was passed in a register.
2840 Output it as if it lived in that register.
2841 The debugger will know from the type
2842 that it was actually passed by invisible reference. */
2844 char regparm_letter;
2845 /* Parm passed in registers and lives in registers or nowhere. */
2847 current_sym_code = DBX_REGPARM_STABS_CODE;
2848 if (use_gnu_debug_info_extensions)
2849 regparm_letter = GDB_INV_REF_REGPARM_STABS_LETTER;
2851 regparm_letter = DBX_REGPARM_STABS_LETTER;
2853 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2854 If it is an unallocated pseudo-reg, then use the register where
2855 it was passed instead. */
2856 if (REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2857 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2859 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2861 current_sym_addr = 0;
2864 if (DECL_NAME (parms))
2867 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2869 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2870 IDENTIFIER_POINTER (DECL_NAME (parms)),
2875 current_sym_nchars = 8;
2876 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2880 dbxout_type (TREE_TYPE (parms), 0);
2881 dbxout_finish_symbol (parms);
2883 else if (GET_CODE (DECL_RTL (parms)) == MEM
2884 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2886 /* Parm was passed via invisible reference, with the reference
2887 living on the stack. DECL_RTL looks like
2888 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it
2889 could look like (MEM (MEM (REG))). */
2890 const char *const decl_name = (DECL_NAME (parms)
2891 ? IDENTIFIER_POINTER (DECL_NAME (parms))
2893 if (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 0)) == REG)
2894 current_sym_value = 0;
2897 = INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms), 0), 0), 1));
2898 current_sym_addr = 0;
2899 current_sym_code = N_PSYM;
2902 fprintf (asmfile, "%s\"%s:v", ASM_STABS_OP, decl_name);
2905 = DEBUGGER_ARG_OFFSET (current_sym_value,
2906 XEXP (XEXP (DECL_RTL (parms), 0), 0));
2907 dbxout_type (TREE_TYPE (parms), 0);
2908 dbxout_finish_symbol (parms);
2910 else if (GET_CODE (DECL_RTL (parms)) == MEM
2911 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2912 /* ??? A constant address for a parm can happen
2913 when the reg it lives in is equiv to a constant in memory.
2914 Should make this not happen, after 2.4. */
2915 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2917 /* Parm was passed in registers but lives on the stack. */
2919 current_sym_code = N_PSYM;
2920 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2921 in which case we want the value of that CONST_INT,
2923 in which case we use a value of zero. */
2924 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2925 current_sym_value = 0;
2928 = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2930 current_sym_addr = 0;
2932 /* Make a big endian correction if the mode of the type of the
2933 parameter is not the same as the mode of the rtl. */
2934 if (BYTES_BIG_ENDIAN
2935 && TYPE_MODE (TREE_TYPE (parms)) != GET_MODE (DECL_RTL (parms))
2936 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms))) < UNITS_PER_WORD)
2938 current_sym_value +=
2939 GET_MODE_SIZE (GET_MODE (DECL_RTL (parms)))
2940 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms)));
2944 if (DECL_NAME (parms))
2947 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2949 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2950 IDENTIFIER_POINTER (DECL_NAME (parms)),
2951 DBX_MEMPARM_STABS_LETTER);
2955 current_sym_nchars = 8;
2956 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2957 DBX_MEMPARM_STABS_LETTER);
2961 = DEBUGGER_ARG_OFFSET (current_sym_value,
2962 XEXP (DECL_RTL (parms), 0));
2963 dbxout_type (TREE_TYPE (parms), 0);
2964 dbxout_finish_symbol (parms);
2967 DBXOUT_DECR_NESTING;
2970 /* Output definitions for the places where parms live during the function,
2971 when different from where they were passed, when the parms were passed
2974 It is not useful to do this for parms passed in registers
2975 that live during the function in different registers, because it is
2976 impossible to look in the passed register for the passed value,
2977 so we use the within-the-function register to begin with.
2979 PARMS is a chain of PARM_DECL nodes. */
2982 dbxout_reg_parms (tree parms)
2986 for (; parms; parms = TREE_CHAIN (parms))
2987 if (DECL_NAME (parms) && PARM_PASSED_IN_MEMORY (parms))
2989 dbxout_prepare_symbol (parms);
2991 /* Report parms that live in registers during the function
2992 but were passed in memory. */
2993 if (GET_CODE (DECL_RTL (parms)) == REG
2994 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2995 dbxout_symbol_location (parms, TREE_TYPE (parms),
2996 0, DECL_RTL (parms));
2997 else if (GET_CODE (DECL_RTL (parms)) == CONCAT)
2998 dbxout_symbol_location (parms, TREE_TYPE (parms),
2999 0, DECL_RTL (parms));
3000 /* Report parms that live in memory but not where they were passed. */
3001 else if (GET_CODE (DECL_RTL (parms)) == MEM
3002 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
3003 dbxout_symbol_location (parms, TREE_TYPE (parms),
3004 0, DECL_RTL (parms));
3006 DBXOUT_DECR_NESTING;
3009 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
3010 output definitions of those names, in raw form */
3013 dbxout_args (tree args)
3017 putc (',', asmfile);
3018 dbxout_type (TREE_VALUE (args), 0);
3020 args = TREE_CHAIN (args);
3024 /* Output everything about a symbol block (a BLOCK node
3025 that represents a scope level),
3026 including recursive output of contained blocks.
3028 BLOCK is the BLOCK node.
3029 DEPTH is its depth within containing symbol blocks.
3030 ARGS is usually zero; but for the outermost block of the
3031 body of a function, it is a chain of PARM_DECLs for the function parameters.
3032 We output definitions of all the register parms
3033 as if they were local variables of that block.
3035 If -g1 was used, we count blocks just the same, but output nothing
3036 except for the outermost block.
3038 Actually, BLOCK may be several blocks chained together.
3039 We handle them all in sequence. */
3042 dbxout_block (tree block, int depth, tree args)
3046 #if DBX_BLOCKS_FUNCTION_RELATIVE
3047 const char *begin_label;
3048 if (current_function_func_begin_label != NULL_TREE)
3049 begin_label = IDENTIFIER_POINTER (current_function_func_begin_label);
3051 begin_label = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
3056 /* Ignore blocks never expanded or otherwise marked as real. */
3057 if (TREE_USED (block) && TREE_ASM_WRITTEN (block))
3061 /* In dbx format, the syms of a block come before the N_LBRAC.
3062 If nothing is output, we don't need the N_LBRAC, either. */
3064 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
3065 did_output = dbxout_syms (BLOCK_VARS (block));
3067 dbxout_reg_parms (args);
3069 /* Now output an N_LBRAC symbol to represent the beginning of
3070 the block. Use the block's tree-walk order to generate
3071 the assembler symbols LBBn and LBEn
3072 that final will define around the code in this block. */
3073 if (depth > 0 && did_output)
3076 blocknum = BLOCK_NUMBER (block);
3077 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
3079 if (BLOCK_HANDLER_BLOCK (block))
3081 /* A catch block. Must precede N_LBRAC. */
3082 tree decl = BLOCK_VARS (block);
3085 fprintf (asmfile, "%s\"%s:C1\",%d,0,0,", ASM_STABS_OP,
3086 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
3087 assemble_name (asmfile, buf);
3088 fprintf (asmfile, "\n");
3089 decl = TREE_CHAIN (decl);
3093 #ifdef DBX_OUTPUT_LBRAC
3094 DBX_OUTPUT_LBRAC (asmfile, buf);
3096 fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_LBRAC);
3097 assemble_name (asmfile, buf);
3098 #if DBX_BLOCKS_FUNCTION_RELATIVE
3099 putc ('-', asmfile);
3100 assemble_name (asmfile, begin_label);
3102 fprintf (asmfile, "\n");
3106 /* Output the subblocks. */
3107 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
3109 /* Refer to the marker for the end of the block. */
3110 if (depth > 0 && did_output)
3113 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
3114 #ifdef DBX_OUTPUT_RBRAC
3115 DBX_OUTPUT_RBRAC (asmfile, buf);
3117 fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_RBRAC);
3118 assemble_name (asmfile, buf);
3119 #if DBX_BLOCKS_FUNCTION_RELATIVE
3120 putc ('-', asmfile);
3121 assemble_name (asmfile, begin_label);
3123 fprintf (asmfile, "\n");
3127 block = BLOCK_CHAIN (block);
3131 /* Output the information about a function and its arguments and result.
3132 Usually this follows the function's code,
3133 but on some systems, it comes before. */
3135 #if defined (DBX_DEBUGGING_INFO)
3137 dbxout_begin_function (tree decl)
3139 int saved_tree_used1 = TREE_USED (decl);
3140 TREE_USED (decl) = 1;
3141 if (DECL_NAME (DECL_RESULT (decl)) != 0)
3143 int saved_tree_used2 = TREE_USED (DECL_RESULT (decl));
3144 TREE_USED (DECL_RESULT (decl)) = 1;
3145 dbxout_symbol (decl, 0);
3146 TREE_USED (DECL_RESULT (decl)) = saved_tree_used2;
3149 dbxout_symbol (decl, 0);
3150 TREE_USED (decl) = saved_tree_used1;
3152 dbxout_parms (DECL_ARGUMENTS (decl));
3153 if (DECL_NAME (DECL_RESULT (decl)) != 0)
3154 dbxout_symbol (DECL_RESULT (decl), 1);
3156 #endif /* DBX_DEBUGGING_INFO */
3158 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
3160 #include "gt-dbxout.h"