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 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. */
188 struct dbx_file GTY(())
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 #ifdef DBX_DEBUGGING_INFO
199 /* If zero then there is no pending BINCL. */
200 static int pending_bincls = 0;
203 /* This is the top of the stack. */
205 static GTY(()) struct dbx_file *current_file;
207 /* This is the next file number to use. */
209 static GTY(()) int next_file_number;
211 /* A counter for dbxout_function_end. */
213 static GTY(()) int scope_labelno;
215 /* A counter for dbxout_source_line. */
217 static GTY(()) int dbxout_source_line_counter;
219 /* Nonzero if we have actually used any of the GDB extensions
220 to the debugging format. The idea is that we use them for the
221 first time only if there's a strong reason, but once we have done that,
222 we use them whenever convenient. */
224 static GTY(()) int have_used_extensions = 0;
226 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
227 for the N_SO filename stabs label. */
229 static GTY(()) int source_label_number = 1;
231 /* Last source file name mentioned in a NOTE insn. */
233 static GTY(()) const char *lastfile;
235 /* Used by PCH machinery to detect if 'lastfile' should be reset to
237 static GTY(()) int lastfile_is_base;
239 /* Typical USG systems don't have stab.h, and they also have
240 no use for DBX-format debugging info. */
242 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
244 /* The original input file name. */
245 static const char *base_input_file;
247 /* Current working directory. */
249 static const char *cwd;
251 #ifdef DEBUG_SYMS_TEXT
252 #define FORCE_TEXT function_section (current_function_decl);
259 #define STAB_CODE_TYPE enum __stab_debug_code
261 /* 1 if PARM is passed to this function in memory. */
263 #define PARM_PASSED_IN_MEMORY(PARM) \
264 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
266 /* A C expression for the integer offset value of an automatic variable
267 (N_LSYM) having address X (an RTX). */
268 #ifndef DEBUGGER_AUTO_OFFSET
269 #define DEBUGGER_AUTO_OFFSET(X) \
270 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
273 /* A C expression for the integer offset value of an argument (N_PSYM)
274 having address X (an RTX). The nominal offset is OFFSET. */
275 #ifndef DEBUGGER_ARG_OFFSET
276 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
279 /* Stream for writing to assembler file. */
281 static FILE *asmfile;
283 /* These variables are for dbxout_symbol to communicate to
284 dbxout_finish_symbol.
285 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
286 current_sym_value and current_sym_addr are two ways to address the
287 value to store in the symtab entry.
288 current_sym_addr if nonzero represents the value as an rtx.
289 If that is zero, current_sym_value is used. This is used
290 when the value is an offset (such as for auto variables,
291 register variables and parms). */
293 static STAB_CODE_TYPE current_sym_code;
294 static int current_sym_value;
295 static rtx current_sym_addr;
297 /* Number of chars of symbol-description generated so far for the
298 current symbol. Used by CHARS and CONTIN. */
300 static int current_sym_nchars;
302 /* Report having output N chars of the current symbol-description. */
304 #define CHARS(N) (current_sym_nchars += (N))
306 /* Break the current symbol-description, generating a continuation,
307 if it has become long. */
309 #ifndef DBX_CONTIN_LENGTH
310 #define DBX_CONTIN_LENGTH 80
313 #if DBX_CONTIN_LENGTH > 0
315 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
317 #define CONTIN do { } while (0)
320 static void emit_bincl_stab (const char *c);
321 static void emit_pending_bincls (void);
322 static inline void emit_pending_bincls_if_required (void);
324 static void dbxout_init (const char *);
325 static void dbxout_finish (const char *);
326 static void dbxout_start_source_file (unsigned, const char *);
327 static void dbxout_end_source_file (unsigned);
328 static void dbxout_typedefs (tree);
329 static void dbxout_fptype_value (tree);
330 static void dbxout_type_index (tree);
331 #if DBX_CONTIN_LENGTH > 0
332 static void dbxout_continue (void);
334 static void dbxout_args (tree);
335 static void dbxout_type_fields (tree);
336 static void dbxout_type_method_1 (tree, const char *);
337 static void dbxout_type_methods (tree);
338 static void dbxout_range_type (tree);
339 static void dbxout_type (tree, int);
340 static bool print_int_cst_bounds_in_octal_p (tree);
341 static void print_int_cst_octal (tree);
342 static void print_octal (unsigned HOST_WIDE_INT, int);
343 static void print_wide_int (HOST_WIDE_INT);
344 static void dbxout_type_name (tree);
345 static void dbxout_class_name_qualifiers (tree);
346 static int dbxout_symbol_location (tree, tree, const char *, rtx);
347 static void dbxout_symbol_name (tree, const char *, int);
348 static void dbxout_prepare_symbol (tree);
349 static void dbxout_finish_symbol (tree);
350 static void dbxout_block (tree, int, tree);
351 static void dbxout_global_decl (tree);
352 static void dbxout_handle_pch (unsigned);
354 /* The debug hooks structure. */
355 #if defined (DBX_DEBUGGING_INFO)
357 static void dbxout_source_line (unsigned int, const char *);
358 static void dbxout_source_file (FILE *, const char *);
359 static void dbxout_function_end (void);
360 static void dbxout_begin_function (tree);
361 static void dbxout_begin_block (unsigned, unsigned);
362 static void dbxout_end_block (unsigned, unsigned);
363 static void dbxout_function_decl (tree);
365 const struct gcc_debug_hooks dbx_debug_hooks =
369 debug_nothing_int_charstar,
370 debug_nothing_int_charstar,
371 dbxout_start_source_file,
372 dbxout_end_source_file,
375 debug_true_tree, /* ignore_block */
376 dbxout_source_line, /* source_line */
377 dbxout_source_line, /* begin_prologue: just output line info */
378 debug_nothing_int_charstar, /* end_prologue */
379 debug_nothing_int_charstar, /* end_epilogue */
380 #ifdef DBX_FUNCTION_FIRST
381 dbxout_begin_function,
383 debug_nothing_tree, /* begin_function */
385 debug_nothing_int, /* end_function */
386 dbxout_function_decl,
387 dbxout_global_decl, /* global_decl */
388 debug_nothing_tree, /* deferred_inline_function */
389 debug_nothing_tree, /* outlining_inline_function */
390 debug_nothing_rtx, /* label */
391 dbxout_handle_pch /* handle_pch */
393 #endif /* DBX_DEBUGGING_INFO */
395 #if defined (XCOFF_DEBUGGING_INFO)
396 const struct gcc_debug_hooks xcoff_debug_hooks =
400 debug_nothing_int_charstar,
401 debug_nothing_int_charstar,
402 dbxout_start_source_file,
403 dbxout_end_source_file,
404 xcoffout_begin_block,
406 debug_true_tree, /* ignore_block */
407 xcoffout_source_line,
408 xcoffout_begin_prologue, /* begin_prologue */
409 debug_nothing_int_charstar, /* end_prologue */
410 xcoffout_end_epilogue,
411 debug_nothing_tree, /* begin_function */
412 xcoffout_end_function,
413 debug_nothing_tree, /* function_decl */
414 dbxout_global_decl, /* global_decl */
415 debug_nothing_tree, /* deferred_inline_function */
416 debug_nothing_tree, /* outlining_inline_function */
417 debug_nothing_rtx, /* label */
418 dbxout_handle_pch /* handle_pch */
420 #endif /* XCOFF_DEBUGGING_INFO */
422 #if defined (DBX_DEBUGGING_INFO)
424 dbxout_function_end (void)
426 char lscope_label_name[100];
427 /* Convert Ltext into the appropriate format for local labels in case
428 the system doesn't insert underscores in front of user generated
430 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name, "Lscope", scope_labelno);
431 (*targetm.asm_out.internal_label) (asmfile, "Lscope", scope_labelno);
434 /* By convention, GCC will mark the end of a function with an N_FUN
435 symbol and an empty string. */
436 #ifdef DBX_OUTPUT_NFUN
437 DBX_OUTPUT_NFUN (asmfile, lscope_label_name, current_function_decl);
439 fprintf (asmfile, "%s\"\",%d,0,0,", ASM_STABS_OP, N_FUN);
440 assemble_name (asmfile, lscope_label_name);
442 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
443 fprintf (asmfile, "\n");
446 #endif /* DBX_DEBUGGING_INFO */
448 /* At the beginning of compilation, start writing the symbol table.
449 Initialize `typevec' and output the standard data types of C. */
452 dbxout_init (const char *input_file_name)
454 char ltext_label_name[100];
455 tree syms = (*lang_hooks.decls.getdecls) ();
457 asmfile = asm_out_file;
460 typevec = (struct typeinfo *) ggc_calloc (typevec_len, sizeof typevec[0]);
462 /* Convert Ltext into the appropriate format for local labels in case
463 the system doesn't insert underscores in front of user generated
465 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
467 /* Put the current working directory in an N_SO symbol. */
468 if (use_gnu_debug_info_extensions)
470 if (!cwd && (cwd = getpwd ()) && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
471 cwd = concat (cwd, FILE_NAME_JOINER, NULL);
474 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
475 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd);
476 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
477 fprintf (asmfile, "%s", ASM_STABS_OP);
478 output_quoted_string (asmfile, cwd);
479 fprintf (asmfile, ",%d,0,0,", N_SO);
480 assemble_name (asmfile, ltext_label_name);
481 fputc ('\n', asmfile);
482 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
486 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
487 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
488 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
489 /* We include outputting `Ltext:' here,
490 because that gives you a way to override it. */
491 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
492 fprintf (asmfile, "%s", ASM_STABS_OP);
493 output_quoted_string (asmfile, input_file_name);
494 fprintf (asmfile, ",%d,0,0,", N_SO);
495 assemble_name (asmfile, ltext_label_name);
496 fputc ('\n', asmfile);
498 (*targetm.asm_out.internal_label) (asmfile, "Ltext", 0);
499 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
501 #ifdef DBX_OUTPUT_GCC_MARKER
502 DBX_OUTPUT_GCC_MARKER (asmfile);
504 /* Emit an N_OPT stab to indicate that this file was compiled by GCC. */
505 fprintf (asmfile, "%s\"%s\",%d,0,0,0\n",
506 ASM_STABS_OP, STABS_GCC_MARKER, N_OPT);
509 base_input_file = lastfile = input_file_name;
511 next_type_number = 1;
514 current_file = (struct dbx_file *) ggc_alloc (sizeof *current_file);
515 current_file->next = NULL;
516 current_file->file_number = 0;
517 current_file->next_type_number = 1;
518 next_file_number = 1;
519 current_file->prev = NULL;
520 current_file->bincl_status = BINCL_NOT_REQUIRED;
521 current_file->pending_bincl_name = NULL;
524 /* Make sure that types `int' and `char' have numbers 1 and 2.
525 Definitions of other integer types will refer to those numbers.
526 (Actually it should no longer matter what their numbers are.
527 Also, if any types with tags have been defined, dbxout_symbol
528 will output them first, so the numbers won't be 1 and 2. That
529 happens in C++. So it's a good thing it should no longer matter). */
531 #ifdef DBX_OUTPUT_STANDARD_TYPES
532 DBX_OUTPUT_STANDARD_TYPES (syms);
535 /* Get all permanent types that have typedef names,
536 and output them all, except for those already output. */
538 dbxout_typedefs (syms);
541 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
542 in the reverse order from that which is found in SYMS. */
545 dbxout_typedefs (tree syms)
549 dbxout_typedefs (TREE_CHAIN (syms));
550 if (TREE_CODE (syms) == TYPE_DECL)
552 tree type = TREE_TYPE (syms);
554 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
555 && COMPLETE_TYPE_P (type)
556 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
557 dbxout_symbol (TYPE_NAME (type), 0);
562 /* Emit BINCL stab using given name. */
564 emit_bincl_stab (const char *name)
566 fprintf (asmfile, "%s", ASM_STABS_OP);
567 output_quoted_string (asmfile, name);
568 fprintf (asmfile, ",%d,0,0,0\n", N_BINCL);
571 /* If there are pending bincls then it is time to emit all of them. */
574 emit_pending_bincls_if_required ()
578 emit_pending_bincls ();
582 /* Emit all pending bincls. */
585 emit_pending_bincls ()
587 struct dbx_file *f = current_file;
589 /* Find first pending bincl. */
590 while (f->bincl_status == BINCL_PENDING)
593 /* Now emit all bincls. */
598 if (f->bincl_status == BINCL_PENDING)
600 emit_bincl_stab (f->pending_bincl_name);
602 /* Update file number and status. */
603 f->file_number = next_file_number++;
604 f->bincl_status = BINCL_PROCESSED;
606 if (f == current_file)
611 /* All pending bincls have been emitted. */
615 /* Change to reading from a new source file. Generate a N_BINCL stab. */
618 dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED,
619 const char *filename ATTRIBUTE_UNUSED)
622 struct dbx_file *n = (struct dbx_file *) ggc_alloc (sizeof *n);
624 n->next = current_file;
625 n->next_type_number = 1;
626 /* Do not assign file number now.
627 Delay it until we actually emit BINCL. */
630 current_file->prev = n;
631 n->bincl_status = BINCL_PENDING;
632 n->pending_bincl_name = filename;
638 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
641 dbxout_end_source_file (unsigned int line ATTRIBUTE_UNUSED)
644 /* Emit EINCL stab only if BINCL is not pending. */
645 if (current_file->bincl_status == BINCL_PROCESSED)
646 fprintf (asmfile, "%s%d,0,0,0\n", ASM_STABN_OP, N_EINCL);
647 current_file->bincl_status = BINCL_NOT_REQUIRED;
648 current_file = current_file->next;
652 /* Handle a few odd cases that occur when trying to make PCH files work. */
655 dbxout_handle_pch (unsigned at_end)
659 /* When using the PCH, this file will be included, so we need to output
661 dbxout_start_source_file (0, lastfile);
663 /* The base file when using the PCH won't be the same as
664 the base file when it's being generated. */
669 /* ... and an EINCL. */
670 dbxout_end_source_file (0);
672 /* Deal with cases where 'lastfile' was never actually changed. */
673 lastfile_is_base = lastfile == NULL;
677 #if defined (DBX_DEBUGGING_INFO)
678 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
681 dbxout_source_file (FILE *file, const char *filename)
683 if (lastfile == 0 && lastfile_is_base)
685 lastfile = base_input_file;
686 lastfile_is_base = 0;
689 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
691 char ltext_label_name[100];
693 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext",
694 source_label_number);
695 fprintf (file, "%s", ASM_STABS_OP);
696 output_quoted_string (file, filename);
697 fprintf (asmfile, ",%d,0,0,", N_SOL);
698 assemble_name (asmfile, ltext_label_name);
699 fputc ('\n', asmfile);
700 if (current_function_decl != NULL_TREE
701 && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
702 ; /* Don't change section amid function. */
705 (*targetm.asm_out.internal_label) (file, "Ltext", source_label_number);
706 source_label_number++;
711 /* Output a line number symbol entry for source file FILENAME and line
715 dbxout_source_line (unsigned int lineno, const char *filename)
717 dbxout_source_file (asmfile, filename);
719 #ifdef ASM_OUTPUT_SOURCE_LINE
720 dbxout_source_line_counter += 1;
721 ASM_OUTPUT_SOURCE_LINE (asmfile, lineno, dbxout_source_line_counter);
723 fprintf (asmfile, "%s%d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
727 /* Describe the beginning of an internal block within a function. */
730 dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n)
732 emit_pending_bincls_if_required ();
733 (*targetm.asm_out.internal_label) (asmfile, "LBB", n);
736 /* Describe the end line-number of an internal block within a function. */
739 dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n)
741 emit_pending_bincls_if_required ();
742 (*targetm.asm_out.internal_label) (asmfile, "LBE", n);
745 /* Output dbx data for a function definition.
746 This includes a definition of the function name itself (a symbol),
747 definitions of the parameters (locating them in the parameter list)
748 and then output the block that makes up the function's body
749 (including all the auto variables of the function). */
752 dbxout_function_decl (tree decl)
754 emit_pending_bincls_if_required ();
755 #ifndef DBX_FUNCTION_FIRST
756 dbxout_begin_function (decl);
758 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
759 #ifdef DBX_OUTPUT_FUNCTION_END
760 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
762 if (use_gnu_debug_info_extensions
763 #if defined(NO_DBX_FUNCTION_END)
764 && ! NO_DBX_FUNCTION_END
766 && targetm.have_named_sections)
767 dbxout_function_end ();
770 #endif /* DBX_DEBUGGING_INFO */
772 /* Debug information for a global DECL. Called from toplev.c after
773 compilation proper has finished. */
775 dbxout_global_decl (tree decl)
777 if (TREE_CODE (decl) == VAR_DECL
778 && ! DECL_EXTERNAL (decl)
779 && DECL_RTL_SET_P (decl)) /* Not necessary? */
781 int saved_tree_used = TREE_USED (decl);
782 TREE_USED (decl) = 1;
783 dbxout_symbol (decl, 0);
784 TREE_USED (decl) = saved_tree_used;
788 /* At the end of compilation, finish writing the symbol table.
789 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
793 dbxout_finish (const char *filename ATTRIBUTE_UNUSED)
795 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
796 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asmfile, filename);
797 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
802 /* Output floating point type values used by the 'R' stab letter.
803 These numbers come from include/aout/stab_gnu.h in binutils/gdb.
805 There are only 3 real/complex types defined, and we need 7/6.
806 We use NF_SINGLE as a generic float type, and NF_COMPLEX as a generic
807 complex type. Since we have the type size anyways, we don't really need
808 to distinguish between different FP types, we only need to distinguish
809 between float and complex. This works fine with gdb.
811 We only use this for complex types, to avoid breaking backwards
812 compatibility for real types. complex types aren't in ISO C90, so it is
813 OK if old debuggers don't understand the debug info we emit for them. */
815 /* ??? These are supposed to be IEEE types, but we don't check for that.
816 We could perhaps add additional numbers for non-IEEE types if we need
820 dbxout_fptype_value (tree type)
823 enum machine_mode mode = TYPE_MODE (type);
825 if (TREE_CODE (type) == REAL_TYPE)
829 else if (mode == DFmode)
831 else if (mode == TFmode || mode == XFmode)
834 /* Use NF_SINGLE as a generic real type for other sizes. */
837 else if (TREE_CODE (type) == COMPLEX_TYPE)
841 else if (mode == DCmode)
843 else if (mode == TCmode || mode == XCmode)
846 /* Use NF_COMPLEX as a generic complex type for other sizes. */
852 putc (value, asmfile);
856 /* Output the index of a type. */
859 dbxout_type_index (tree type)
861 #ifndef DBX_USE_BINCL
862 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
865 struct typeinfo *t = &typevec[TYPE_SYMTAB_ADDRESS (type)];
866 fprintf (asmfile, "(%d,%d)", t->file_number, t->type_number);
871 #if DBX_CONTIN_LENGTH > 0
872 /* Continue a symbol-description that gets too big.
873 End one symbol table entry with a double-backslash
874 and start a new one, eventually producing something like
875 .stabs "start......\\",code,0,value
876 .stabs "...rest",code,0,value */
879 dbxout_continue (void)
881 emit_pending_bincls_if_required ();
882 #ifdef DBX_CONTIN_CHAR
883 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
885 fprintf (asmfile, "\\\\");
887 dbxout_finish_symbol (NULL_TREE);
888 fprintf (asmfile, "%s\"", ASM_STABS_OP);
889 current_sym_nchars = 0;
891 #endif /* DBX_CONTIN_LENGTH > 0 */
893 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
894 This must be a separate function because anonymous unions require
898 dbxout_type_fields (tree type)
902 /* Output the name, type, position (in bits), size (in bits) of each
903 field that we can support. */
904 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
906 /* Omit here local type decls until we know how to support them. */
907 if (TREE_CODE (tem) == TYPE_DECL
908 /* Omit fields whose position or size are variable or too large to
910 || (TREE_CODE (tem) == FIELD_DECL
911 && (! host_integerp (bit_position (tem), 0)
913 || ! host_integerp (DECL_SIZE (tem), 1)))
914 /* Omit here the nameless fields that are used to skip bits. */
915 || DECL_IGNORED_P (tem))
918 else if (TREE_CODE (tem) != CONST_DECL)
920 /* Continue the line if necessary,
921 but not before the first field. */
922 if (tem != TYPE_FIELDS (type))
927 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
928 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
932 fprintf (asmfile, ":");
936 if (use_gnu_debug_info_extensions
937 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
938 || TREE_CODE (tem) != FIELD_DECL))
940 have_used_extensions = 1;
942 putc ((TREE_PRIVATE (tem) ? '0'
943 : TREE_PROTECTED (tem) ? '1' : '2'),
948 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
949 && DECL_BIT_FIELD_TYPE (tem))
950 ? DECL_BIT_FIELD_TYPE (tem) : TREE_TYPE (tem), 0);
952 if (TREE_CODE (tem) == VAR_DECL)
954 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
956 tree name = DECL_ASSEMBLER_NAME (tem);
958 have_used_extensions = 1;
959 fprintf (asmfile, ":%s;", IDENTIFIER_POINTER (name));
960 CHARS (IDENTIFIER_LENGTH (name) + 2);
964 /* If TEM is non-static, GDB won't understand it. */
965 fprintf (asmfile, ",0,0;");
972 print_wide_int (int_bit_position (tem));
974 print_wide_int (tree_low_cst (DECL_SIZE (tem), 1));
982 /* Subroutine of `dbxout_type_methods'. Output debug info about the
983 method described DECL. DEBUG_NAME is an encoding of the method's
984 type signature. ??? We may be able to do without DEBUG_NAME altogether
988 dbxout_type_method_1 (tree decl, const char *debug_name)
992 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
994 else /* it's a METHOD_TYPE. */
996 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
997 /* A for normal functions.
998 B for `const' member functions.
999 C for `volatile' member functions.
1000 D for `const volatile' member functions. */
1001 if (TYPE_READONLY (TREE_TYPE (firstarg)))
1003 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
1006 if (DECL_VINDEX (decl))
1012 fprintf (asmfile, ":%s;%c%c%c", debug_name,
1013 TREE_PRIVATE (decl) ? '0'
1014 : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
1015 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
1016 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
1018 if (DECL_VINDEX (decl) && host_integerp (DECL_VINDEX (decl), 0))
1020 print_wide_int (tree_low_cst (DECL_VINDEX (decl), 0));
1021 putc (';', asmfile);
1023 dbxout_type (DECL_CONTEXT (decl), 0);
1024 fprintf (asmfile, ";");
1029 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
1033 dbxout_type_methods (tree type)
1035 /* C++: put out the method names and their parameter lists */
1036 tree methods = TYPE_METHODS (type);
1040 char formatted_type_identifier_length[16];
1041 int type_identifier_length;
1043 if (methods == NULL_TREE)
1046 type_encoding = DECL_NAME (TYPE_NAME (type));
1049 /* C++: Template classes break some assumptions made by this code about
1050 the class names, constructor names, and encodings for assembler
1051 label names. For now, disable output of dbx info for them. */
1053 const char *ptr = IDENTIFIER_POINTER (type_encoding);
1054 /* This should use index. (mrs) */
1055 while (*ptr && *ptr != '<') ptr++;
1066 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
1068 sprintf (formatted_type_identifier_length, "%d", type_identifier_length);
1070 if (TREE_CODE (methods) != TREE_VEC)
1072 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
1073 fndecl = TREE_VEC_ELT (methods, 0);
1075 fndecl = TREE_VEC_ELT (methods, 1);
1079 int need_prefix = 1;
1081 /* Group together all the methods for the same operation.
1082 These differ in the types of the arguments. */
1083 for (last = NULL_TREE;
1084 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
1085 fndecl = TREE_CHAIN (fndecl))
1086 /* Output the name of the field (after overloading), as
1087 well as the name of the field before overloading, along
1088 with its parameter list */
1090 /* This is the "mangled" name of the method.
1091 It encodes the argument types. */
1092 const char *debug_name;
1094 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these
1095 include TEMPLATE_DECLs.) The debugger doesn't know what
1096 to do with such entities anyhow. */
1097 if (TREE_CODE (fndecl) != FUNCTION_DECL)
1100 debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
1106 /* Also ignore abstract methods; those are only interesting to
1107 the DWARF backends. */
1108 if (DECL_IGNORED_P (fndecl) || DECL_ABSTRACT (fndecl))
1111 /* Redundantly output the plain name, since that's what gdb
1115 tree name = DECL_NAME (fndecl);
1116 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
1117 CHARS (IDENTIFIER_LENGTH (name) + 2);
1121 dbxout_type (TREE_TYPE (fndecl), 0);
1123 dbxout_type_method_1 (fndecl, debug_name);
1127 putc (';', asmfile);
1133 /* Emit a "range" type specification, which has the form:
1134 "r<index type>;<lower bound>;<upper bound>;".
1135 TYPE is an INTEGER_TYPE. */
1138 dbxout_range_type (tree type)
1140 fprintf (asmfile, "r");
1141 if (TREE_TYPE (type))
1142 dbxout_type (TREE_TYPE (type), 0);
1143 else if (TREE_CODE (type) != INTEGER_TYPE)
1144 dbxout_type (type, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
1147 /* Traditionally, we made sure 'int' was type 1, and builtin types
1148 were defined to be sub-ranges of int. Unfortunately, this
1149 does not allow us to distinguish true sub-ranges from integer
1150 types. So, instead we define integer (non-sub-range) types as
1151 sub-ranges of themselves. This matters for Chill. If this isn't
1152 a subrange type, then we want to define it in terms of itself.
1153 However, in C, this may be an anonymous integer type, and we don't
1154 want to emit debug info referring to it. Just calling
1155 dbxout_type_index won't work anyways, because the type hasn't been
1156 defined yet. We make this work for both cases by checked to see
1157 whether this is a defined type, referring to it if it is, and using
1159 if (TYPE_SYMTAB_ADDRESS (type) != 0)
1160 dbxout_type_index (type);
1162 dbxout_type_index (integer_type_node);
1165 if (TYPE_MIN_VALUE (type) != 0
1166 && host_integerp (TYPE_MIN_VALUE (type), 0))
1168 putc (';', asmfile);
1170 if (print_int_cst_bounds_in_octal_p (type))
1171 print_int_cst_octal (TYPE_MIN_VALUE (type));
1173 print_wide_int (tree_low_cst (TYPE_MIN_VALUE (type), 0));
1177 fprintf (asmfile, ";0");
1181 if (TYPE_MAX_VALUE (type) != 0
1182 && host_integerp (TYPE_MAX_VALUE (type), 0))
1184 putc (';', asmfile);
1186 if (print_int_cst_bounds_in_octal_p (type))
1187 print_int_cst_octal (TYPE_MAX_VALUE (type));
1189 print_wide_int (tree_low_cst (TYPE_MAX_VALUE (type), 0));
1190 putc (';', asmfile);
1195 fprintf (asmfile, ";-1;");
1201 /* Output a reference to a type. If the type has not yet been
1202 described in the dbx output, output its definition now.
1203 For a type already defined, just refer to its definition
1204 using the type number.
1206 If FULL is nonzero, and the type has been described only with
1207 a forward-reference, output the definition now.
1208 If FULL is zero in this case, just refer to the forward-reference
1209 using the number previously allocated. */
1212 dbxout_type (tree type, int full)
1216 static int anonymous_type_number = 0;
1218 if (TREE_CODE (type) == VECTOR_TYPE)
1219 /* The frontend feeds us a representation for the vector as a struct
1220 containing an array. Pull out the array type. */
1221 type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type)));
1223 /* If there was an input error and we don't really have a type,
1224 avoid crashing and write something that is at least valid
1225 by assuming `int'. */
1226 if (type == error_mark_node)
1227 type = integer_type_node;
1230 if (TYPE_NAME (type)
1231 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1232 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type)))
1236 /* Try to find the "main variant" with the same name. */
1237 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1238 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
1239 main_variant = TREE_TYPE (TYPE_NAME (type));
1241 main_variant = TYPE_MAIN_VARIANT (type);
1243 /* If we are not using extensions, stabs does not distinguish const and
1244 volatile, so there is no need to make them separate types. */
1245 if (!use_gnu_debug_info_extensions)
1246 type = main_variant;
1248 if (TYPE_SYMTAB_ADDRESS (type) == 0)
1250 /* Type has no dbx number assigned. Assign next available number. */
1251 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
1253 /* Make sure type vector is long enough to record about this type. */
1255 if (next_type_number == typevec_len)
1258 = (struct typeinfo *) ggc_realloc (typevec,
1260 * sizeof typevec[0]));
1261 memset ((char *) (typevec + typevec_len), 0,
1262 typevec_len * sizeof typevec[0]);
1266 #ifdef DBX_USE_BINCL
1267 emit_pending_bincls_if_required ();
1268 typevec[TYPE_SYMTAB_ADDRESS (type)].file_number
1269 = current_file->file_number;
1270 typevec[TYPE_SYMTAB_ADDRESS (type)].type_number
1271 = current_file->next_type_number++;
1275 if (flag_debug_only_used_symbols)
1277 if ((TREE_CODE (type) == RECORD_TYPE
1278 || TREE_CODE (type) == UNION_TYPE
1279 || TREE_CODE (type) == QUAL_UNION_TYPE
1280 || TREE_CODE (type) == ENUMERAL_TYPE)
1281 && TYPE_STUB_DECL (type)
1282 && TREE_CODE_CLASS (TREE_CODE (TYPE_STUB_DECL (type))) == 'd'
1283 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type)))
1284 debug_queue_symbol (TYPE_STUB_DECL (type));
1285 else if (TYPE_NAME (type)
1286 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1287 debug_queue_symbol (TYPE_NAME (type));
1290 /* Output the number of this type, to refer to it. */
1291 dbxout_type_index (type);
1293 #ifdef DBX_TYPE_DEFINED
1294 if (DBX_TYPE_DEFINED (type))
1298 /* If this type's definition has been output or is now being output,
1301 switch (typevec[TYPE_SYMTAB_ADDRESS (type)].status)
1306 /* If we have already had a cross reference,
1307 and either that's all we want or that's the best we could do,
1308 don't repeat the cross reference.
1309 Sun dbx crashes if we do. */
1310 if (! full || !COMPLETE_TYPE_P (type)
1311 /* No way in DBX fmt to describe a variable size. */
1312 || ! host_integerp (TYPE_SIZE (type), 1))
1320 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1321 leave the type-number completely undefined rather than output
1322 a cross-reference. If we have already used GNU debug info extensions,
1323 then it is OK to output a cross reference. This is necessary to get
1324 proper C++ debug output. */
1325 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
1326 || TREE_CODE (type) == QUAL_UNION_TYPE
1327 || TREE_CODE (type) == ENUMERAL_TYPE)
1328 && ! use_gnu_debug_info_extensions)
1329 /* We must use the same test here as we use twice below when deciding
1330 whether to emit a cross-reference. */
1331 if ((TYPE_NAME (type) != 0
1332 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1333 && DECL_IGNORED_P (TYPE_NAME (type)))
1335 || !COMPLETE_TYPE_P (type)
1336 /* No way in DBX fmt to describe a variable size. */
1337 || ! host_integerp (TYPE_SIZE (type), 1))
1339 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1344 /* Output a definition now. */
1346 fprintf (asmfile, "=");
1349 /* Mark it as defined, so that if it is self-referent
1350 we will not get into an infinite recursion of definitions. */
1352 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_DEFINED;
1354 /* If this type is a variant of some other, hand off. Types with
1355 different names are usefully distinguished. We only distinguish
1356 cv-qualified types if we're using extensions. */
1357 if (TYPE_READONLY (type) > TYPE_READONLY (main_variant))
1359 putc ('k', asmfile);
1361 dbxout_type (build_type_variant (type, 0, TYPE_VOLATILE (type)), 0);
1364 else if (TYPE_VOLATILE (type) > TYPE_VOLATILE (main_variant))
1366 putc ('B', asmfile);
1368 dbxout_type (build_type_variant (type, TYPE_READONLY (type), 0), 0);
1371 else if (main_variant != TYPE_MAIN_VARIANT (type))
1373 if (flag_debug_only_used_symbols)
1375 tree orig_type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
1377 if ((TREE_CODE (orig_type) == RECORD_TYPE
1378 || TREE_CODE (orig_type) == UNION_TYPE
1379 || TREE_CODE (orig_type) == QUAL_UNION_TYPE
1380 || TREE_CODE (orig_type) == ENUMERAL_TYPE)
1381 && TYPE_STUB_DECL (orig_type)
1382 && ! DECL_IGNORED_P (TYPE_STUB_DECL (orig_type)))
1383 debug_queue_symbol (TYPE_STUB_DECL (orig_type));
1385 /* 'type' is a typedef; output the type it refers to. */
1386 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type)), 0);
1389 /* else continue. */
1391 switch (TREE_CODE (type))
1395 /* For a void type, just define it as itself; ie, "5=5".
1396 This makes us consider it defined
1397 without saying what it is. The debugger will make it
1398 a void type when the reference is seen, and nothing will
1399 ever override that default. */
1400 dbxout_type_index (type);
1404 if (type == char_type_node && ! TREE_UNSIGNED (type))
1406 /* Output the type `char' as a subrange of itself!
1407 I don't understand this definition, just copied it
1408 from the output of pcc.
1409 This used to use `r2' explicitly and we used to
1410 take care to make sure that `char' was type number 2. */
1411 fprintf (asmfile, "r");
1413 dbxout_type_index (type);
1414 fprintf (asmfile, ";0;127;");
1418 /* If this is a subtype of another integer type, always prefer to
1419 write it as a subtype. */
1420 else if (TREE_TYPE (type) != 0
1421 && TREE_CODE (TREE_TYPE (type)) == INTEGER_TYPE)
1423 /* If the size is non-standard, say what it is if we can use
1426 if (use_gnu_debug_info_extensions
1427 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1429 have_used_extensions = 1;
1430 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1434 dbxout_range_type (type);
1439 /* If the size is non-standard, say what it is if we can use
1442 if (use_gnu_debug_info_extensions
1443 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1445 have_used_extensions = 1;
1446 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1450 if (print_int_cst_bounds_in_octal_p (type))
1452 fprintf (asmfile, "r");
1455 /* If this type derives from another type, output type index of
1456 parent type. This is particularly important when parent type
1457 is an enumerated type, because not generating the parent type
1458 index would transform the definition of this enumerated type
1459 into a plain unsigned type. */
1460 if (TREE_TYPE (type) != 0)
1461 dbxout_type_index (TREE_TYPE (type));
1463 dbxout_type_index (type);
1465 fprintf (asmfile, ";");
1467 print_int_cst_octal (TYPE_MIN_VALUE (type));
1468 fprintf (asmfile, ";");
1470 print_int_cst_octal (TYPE_MAX_VALUE (type));
1471 fprintf (asmfile, ";");
1476 /* Output other integer types as subranges of `int'. */
1477 dbxout_range_type (type);
1483 /* This used to say `r1' and we used to take care
1484 to make sure that `int' was type number 1. */
1485 fprintf (asmfile, "r");
1487 dbxout_type_index (integer_type_node);
1488 putc (';', asmfile);
1490 print_wide_int (int_size_in_bytes (type));
1491 fputs (";0;", asmfile);
1496 if (use_gnu_debug_info_extensions)
1498 have_used_extensions = 1;
1499 fputs ("@s", asmfile);
1501 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1502 fputs (";-20;", asmfile);
1507 /* Output the type `char' as a subrange of itself.
1508 That is what pcc seems to do. */
1509 fprintf (asmfile, "r");
1511 dbxout_type_index (char_type_node);
1512 fprintf (asmfile, ";0;%d;", TREE_UNSIGNED (type) ? 255 : 127);
1518 if (use_gnu_debug_info_extensions)
1520 have_used_extensions = 1;
1521 fputs ("@s", asmfile);
1523 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1524 fputs (";-16;", asmfile);
1527 else /* Define as enumeral type (False, True) */
1529 fprintf (asmfile, "eFalse:0,True:1,;");
1535 putc ('d', asmfile);
1537 dbxout_type (TREE_TYPE (type), 0);
1541 /* Differs from the REAL_TYPE by its new data type number */
1543 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1545 putc ('R', asmfile);
1547 dbxout_fptype_value (type);
1548 putc (';', asmfile);
1550 print_wide_int (2 * int_size_in_bytes (TREE_TYPE (type)));
1551 fputs (";0;", asmfile);
1556 /* Output a complex integer type as a structure,
1557 pending some other way to do it. */
1558 putc ('s', asmfile);
1560 print_wide_int (int_size_in_bytes (type));
1561 fprintf (asmfile, "real:");
1564 dbxout_type (TREE_TYPE (type), 0);
1565 fprintf (asmfile, ",0,%d;", TYPE_PRECISION (TREE_TYPE (type)));
1567 fprintf (asmfile, "imag:");
1569 dbxout_type (TREE_TYPE (type), 0);
1570 fprintf (asmfile, ",%d,%d;;", TYPE_PRECISION (TREE_TYPE (type)),
1571 TYPE_PRECISION (TREE_TYPE (type)));
1577 if (use_gnu_debug_info_extensions)
1579 have_used_extensions = 1;
1580 fputs ("@s", asmfile);
1582 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1583 putc (';', asmfile);
1586 /* Check if a bitstring type, which in Chill is
1587 different from a [power]set. */
1588 if (TYPE_STRING_FLAG (type))
1590 fprintf (asmfile, "@S;");
1594 putc ('S', asmfile);
1596 dbxout_type (TYPE_DOMAIN (type), 0);
1600 /* Make arrays of packed bits look like bitstrings for chill. */
1601 if (TYPE_PACKED (type) && use_gnu_debug_info_extensions)
1603 have_used_extensions = 1;
1604 fputs ("@s", asmfile);
1606 print_wide_int (BITS_PER_UNIT * int_size_in_bytes (type));
1607 fprintf (asmfile, ";@S;S");
1609 dbxout_type (TYPE_DOMAIN (type), 0);
1613 /* Output "a" followed by a range type definition
1614 for the index type of the array
1615 followed by a reference to the target-type.
1616 ar1;0;N;M for a C array of type M and size N+1. */
1617 /* Check if a character string type, which in Chill is
1618 different from an array of characters. */
1619 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1621 have_used_extensions = 1;
1622 fprintf (asmfile, "@S;");
1625 tem = TYPE_DOMAIN (type);
1628 fprintf (asmfile, "ar");
1630 dbxout_type_index (integer_type_node);
1631 fprintf (asmfile, ";0;-1;");
1636 fprintf (asmfile, "a");
1638 dbxout_range_type (tem);
1641 dbxout_type (TREE_TYPE (type), 0);
1646 case QUAL_UNION_TYPE:
1648 int i, n_baseclasses = 0;
1650 if (TYPE_BINFO (type) != 0
1651 && TREE_CODE (TYPE_BINFO (type)) == TREE_VEC
1652 && TYPE_BINFO_BASETYPES (type) != 0)
1653 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1655 /* Output a structure type. We must use the same test here as we
1656 use in the DBX_NO_XREFS case above. */
1657 if ((TYPE_NAME (type) != 0
1658 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1659 && DECL_IGNORED_P (TYPE_NAME (type)))
1661 || !COMPLETE_TYPE_P (type)
1662 /* No way in DBX fmt to describe a variable size. */
1663 || ! host_integerp (TYPE_SIZE (type), 1))
1665 /* If the type is just a cross reference, output one
1666 and mark the type as partially described.
1667 If it later becomes defined, we will output
1668 its real definition.
1669 If the type has a name, don't nest its definition within
1670 another type's definition; instead, output an xref
1671 and let the definition come when the name is defined. */
1672 fputs ((TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu", asmfile);
1674 #if 0 /* This assertion is legitimately false in C++. */
1675 /* We shouldn't be outputting a reference to a type before its
1676 definition unless the type has a tag name.
1677 A typedef name without a tag name should be impossible. */
1678 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1681 if (TYPE_NAME (type) != 0)
1682 dbxout_type_name (type);
1685 fprintf (asmfile, "$$%d", anonymous_type_number++);
1689 fprintf (asmfile, ":");
1691 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1695 /* Identify record or union, and print its size. */
1696 putc (((TREE_CODE (type) == RECORD_TYPE) ? 's' : 'u'), asmfile);
1698 print_wide_int (int_size_in_bytes (type));
1700 if (use_gnu_debug_info_extensions)
1704 have_used_extensions = 1;
1705 fprintf (asmfile, "!%d,", n_baseclasses);
1709 for (i = 0; i < n_baseclasses; i++)
1711 tree binfo = TYPE_BINFO (type);
1712 tree child = BINFO_BASETYPE (binfo, i);
1713 tree access = (BINFO_BASEACCESSES (binfo)
1714 ? BINFO_BASEACCESS (binfo, i) : access_public_node);
1716 if (use_gnu_debug_info_extensions)
1718 have_used_extensions = 1;
1719 putc (TREE_VIA_VIRTUAL (child) ? '1' : '0', asmfile);
1720 putc (access == access_public_node ? '2' : '0', asmfile);
1722 if (TREE_VIA_VIRTUAL (child)
1723 && strcmp (lang_hooks.name, "GNU C++") == 0)
1724 /* For a virtual base, print the (negative) offset within
1725 the vtable where we must look to find the necessary
1727 print_wide_int (tree_low_cst (BINFO_VPTR_FIELD (child), 0)
1730 print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0)
1732 putc (',', asmfile);
1734 dbxout_type (BINFO_TYPE (child), 0);
1735 putc (';', asmfile);
1740 /* Print out the base class information with fields
1741 which have the same names at the types they hold. */
1742 dbxout_type_name (BINFO_TYPE (child));
1743 putc (':', asmfile);
1745 dbxout_type (BINFO_TYPE (child), full);
1746 putc (',', asmfile);
1748 print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0)
1750 putc (',', asmfile);
1752 print_wide_int (tree_low_cst (DECL_SIZE
1754 (BINFO_TYPE (child))),
1757 putc (';', asmfile);
1763 /* Write out the field declarations. */
1764 dbxout_type_fields (type);
1765 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1767 have_used_extensions = 1;
1768 dbxout_type_methods (type);
1771 putc (';', asmfile);
1774 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1775 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1776 && TYPE_VFIELD (type))
1778 have_used_extensions = 1;
1780 /* Tell GDB+ that it may keep reading. */
1781 putc ('~', asmfile);
1784 /* We need to write out info about what field this class
1785 uses as its "main" vtable pointer field, because if this
1786 field is inherited from a base class, GDB cannot necessarily
1787 figure out which field it's using in time. */
1788 if (TYPE_VFIELD (type))
1790 putc ('%', asmfile);
1792 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0);
1795 putc (';', asmfile);
1801 /* We must use the same test here as we use in the DBX_NO_XREFS case
1802 above. We simplify it a bit since an enum will never have a variable
1804 if ((TYPE_NAME (type) != 0
1805 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1806 && DECL_IGNORED_P (TYPE_NAME (type)))
1808 || !COMPLETE_TYPE_P (type))
1810 fprintf (asmfile, "xe");
1812 dbxout_type_name (type);
1813 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1814 putc (':', asmfile);
1818 if (use_gnu_debug_info_extensions
1819 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1821 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1825 putc ('e', asmfile);
1827 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1829 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1830 CHARS (IDENTIFIER_LENGTH (TREE_PURPOSE (tem)) + 1);
1831 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1832 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1833 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1834 && (HOST_WIDE_INT) TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1835 print_wide_int (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1837 print_int_cst_octal (TREE_VALUE (tem));
1839 putc (',', asmfile);
1841 if (TREE_CHAIN (tem) != 0)
1845 putc (';', asmfile);
1850 putc ('*', asmfile);
1852 dbxout_type (TREE_TYPE (type), 0);
1856 if (use_gnu_debug_info_extensions)
1858 have_used_extensions = 1;
1859 putc ('#', asmfile);
1862 /* Write the argument types out longhand. */
1863 dbxout_type (TYPE_METHOD_BASETYPE (type), 0);
1864 putc (',', asmfile);
1866 dbxout_type (TREE_TYPE (type), 0);
1867 dbxout_args (TYPE_ARG_TYPES (type));
1868 putc (';', asmfile);
1872 /* Treat it as a function type. */
1873 dbxout_type (TREE_TYPE (type), 0);
1877 if (use_gnu_debug_info_extensions)
1879 have_used_extensions = 1;
1880 putc ('@', asmfile);
1882 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0);
1883 putc (',', asmfile);
1885 dbxout_type (TREE_TYPE (type), 0);
1888 /* Should print as an int, because it is really just an offset. */
1889 dbxout_type (integer_type_node, 0);
1892 case REFERENCE_TYPE:
1893 if (use_gnu_debug_info_extensions)
1894 have_used_extensions = 1;
1895 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1897 dbxout_type (TREE_TYPE (type), 0);
1901 putc ('f', asmfile);
1903 dbxout_type (TREE_TYPE (type), 0);
1911 /* Return nonzero if the given type represents an integer whose bounds
1912 should be printed in octal format. */
1915 print_int_cst_bounds_in_octal_p (tree type)
1917 /* If we can use GDB extensions and the size is wider than a long
1918 (the size used by GDB to read them) or we may have trouble writing
1919 the bounds the usual way, write them in octal. Note the test is for
1920 the *target's* size of "long", not that of the host. The host test
1921 is just to make sure we can write it out in case the host wide int
1922 is narrower than the target "long".
1924 For unsigned types, we use octal if they are the same size or larger.
1925 This is because we print the bounds as signed decimal, and hence they
1926 can't span same size unsigned types. */
1928 if (use_gnu_debug_info_extensions
1929 && TYPE_MIN_VALUE (type) != 0
1930 && TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST
1931 && TYPE_MAX_VALUE (type) != 0
1932 && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST
1933 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1934 || ((TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node))
1935 && TREE_UNSIGNED (type))
1936 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT
1937 || (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT
1938 && TREE_UNSIGNED (type))))
1944 /* Print the value of integer constant C, in octal,
1945 handling double precision. */
1948 print_int_cst_octal (tree c)
1950 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1951 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1952 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1953 unsigned int width = TYPE_PRECISION (TREE_TYPE (c));
1955 /* GDB wants constants with no extra leading "1" bits, so
1956 we need to remove any sign-extension that might be
1958 if (width == HOST_BITS_PER_WIDE_INT * 2)
1960 else if (width > HOST_BITS_PER_WIDE_INT)
1961 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1962 else if (width == HOST_BITS_PER_WIDE_INT)
1965 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1967 fprintf (asmfile, "0");
1972 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1973 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1977 unsigned HOST_WIDE_INT beg = high >> excess;
1978 unsigned HOST_WIDE_INT middle
1979 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1980 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1981 unsigned HOST_WIDE_INT end
1982 = low & (((unsigned HOST_WIDE_INT) 1
1983 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1986 fprintf (asmfile, "%o%01o", (int) beg, (int) middle);
1988 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1993 print_octal (unsigned HOST_WIDE_INT value, int digits)
1997 for (i = digits - 1; i >= 0; i--)
1998 fprintf (asmfile, "%01o", (int) ((value >> (3 * i)) & 7));
2003 /* Output C in decimal while adjusting the number of digits written. */
2006 print_wide_int (HOST_WIDE_INT c)
2010 fprintf (asmfile, HOST_WIDE_INT_PRINT_DEC, c);
2021 /* Output the name of type TYPE, with no punctuation.
2022 Such names can be set up either by typedef declarations
2023 or by struct, enum and union tags. */
2026 dbxout_type_name (tree type)
2029 if (TYPE_NAME (type) == 0)
2031 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
2033 t = TYPE_NAME (type);
2035 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
2037 t = DECL_NAME (TYPE_NAME (type));
2042 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
2043 CHARS (IDENTIFIER_LENGTH (t));
2046 /* Output leading leading struct or class names needed for qualifying
2047 type whose scope is limited to a struct or class. */
2050 dbxout_class_name_qualifiers (tree decl)
2052 tree context = decl_type_context (decl);
2054 if (context != NULL_TREE
2055 && TREE_CODE(context) == RECORD_TYPE
2056 && TYPE_NAME (context) != 0
2057 && (TREE_CODE (TYPE_NAME (context)) == IDENTIFIER_NODE
2058 || (DECL_NAME (TYPE_NAME (context)) != 0)))
2060 tree name = TYPE_NAME (context);
2062 emit_pending_bincls_if_required ();
2064 if (TREE_CODE (name) == TYPE_DECL)
2066 dbxout_class_name_qualifiers (name);
2067 name = DECL_NAME (name);
2069 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
2070 CHARS (IDENTIFIER_LENGTH (name) + 2);
2074 /* Output a .stabs for the symbol defined by DECL,
2075 which must be a ..._DECL node in the normal namespace.
2076 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
2077 LOCAL is nonzero if the scope is less than the entire file.
2078 Return 1 if a stabs might have been emitted. */
2081 dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED)
2083 tree type = TREE_TYPE (decl);
2084 tree context = NULL_TREE;
2087 /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */
2090 /* Cast avoids warning in old compilers. */
2091 current_sym_code = (STAB_CODE_TYPE) 0;
2092 current_sym_value = 0;
2093 current_sym_addr = 0;
2095 /* Ignore nameless syms, but don't ignore type tags. */
2097 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
2098 || DECL_IGNORED_P (decl))
2099 DBXOUT_DECR_NESTING_AND_RETURN (0);
2101 /* If we are to generate only the symbols actually used then such
2102 symbol nodees are flagged with TREE_USED. Ignore any that
2103 aren't flaged as TREE_USED. */
2105 if (flag_debug_only_used_symbols)
2109 if (!TREE_USED (decl)
2110 && (TREE_CODE (decl) != VAR_DECL || !DECL_INITIAL (decl)))
2111 DBXOUT_DECR_NESTING_AND_RETURN (0);
2113 /* We now have a used symbol. We need to generate the info for
2114 the symbol's type in addition to the symbol itself. These
2115 type symbols are queued to be generated after were done with
2116 the symbol itself (done because the symbol's info is generated
2117 with fprintf's, etc. as it determines what's needed).
2119 Note, because the TREE_TYPE(type) might be something like a
2120 pointer to a named type we need to look for the first name
2121 we see following the TREE_TYPE chain. */
2124 while (POINTER_TYPE_P (t))
2127 /* RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, and ENUMERAL_TYPE
2128 need special treatment. The TYPE_STUB_DECL field in these
2129 types generally represents the tag name type we want to
2130 output. In addition there could be a typedef type with
2131 a different name. In that case we also want to output
2134 if ((TREE_CODE (t) == RECORD_TYPE
2135 || TREE_CODE (t) == UNION_TYPE
2136 || TREE_CODE (t) == QUAL_UNION_TYPE
2137 || TREE_CODE (t) == ENUMERAL_TYPE)
2138 && TYPE_STUB_DECL (t)
2139 && TYPE_STUB_DECL (t) != decl
2140 && TREE_CODE_CLASS (TREE_CODE (TYPE_STUB_DECL (t))) == 'd'
2141 && ! DECL_IGNORED_P (TYPE_STUB_DECL (t)))
2143 debug_queue_symbol (TYPE_STUB_DECL (t));
2145 && TYPE_NAME (t) != TYPE_STUB_DECL (t)
2146 && TYPE_NAME (t) != decl
2147 && TREE_CODE_CLASS (TREE_CODE (TYPE_NAME (t))) == 'd')
2148 debug_queue_symbol (TYPE_NAME (t));
2150 else if (TYPE_NAME (t)
2151 && TYPE_NAME (t) != decl
2152 && TREE_CODE_CLASS (TREE_CODE (TYPE_NAME (t))) == 'd')
2153 debug_queue_symbol (TYPE_NAME (t));
2156 emit_pending_bincls_if_required ();
2158 dbxout_prepare_symbol (decl);
2160 /* The output will always start with the symbol name,
2161 so always count that in the length-output-so-far. */
2163 if (DECL_NAME (decl) != 0)
2164 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
2166 switch (TREE_CODE (decl))
2169 /* Enum values are defined by defining the enum type. */
2173 if (DECL_RTL (decl) == 0)
2174 DBXOUT_DECR_NESTING_AND_RETURN (0);
2175 if (DECL_EXTERNAL (decl))
2177 /* Don't mention a nested function under its parent. */
2178 context = decl_function_context (decl);
2179 if (context == current_function_decl)
2181 if (GET_CODE (DECL_RTL (decl)) != MEM
2182 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
2186 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2187 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
2188 TREE_PUBLIC (decl) ? 'F' : 'f');
2191 current_sym_code = N_FUN;
2192 current_sym_addr = XEXP (DECL_RTL (decl), 0);
2194 if (TREE_TYPE (type))
2195 dbxout_type (TREE_TYPE (type), 0);
2197 dbxout_type (void_type_node, 0);
2199 /* For a nested function, when that function is compiled,
2200 mention the containing function name
2201 as well as (since dbx wants it) our own assembler-name. */
2203 fprintf (asmfile, ",%s,%s",
2204 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
2205 IDENTIFIER_POINTER (DECL_NAME (context)));
2207 dbxout_finish_symbol (decl);
2211 /* Don't output the same typedef twice.
2212 And don't output what language-specific stuff doesn't want output. */
2213 if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl))
2214 DBXOUT_DECR_NESTING_AND_RETURN (0);
2222 if (DECL_NAME (decl))
2224 /* Nonzero means we must output a tag as well as a typedef. */
2227 /* Handle the case of a C++ structure or union
2228 where the TYPE_NAME is a TYPE_DECL
2229 which gives both a typedef name and a tag. */
2230 /* dbx requires the tag first and the typedef second. */
2231 if ((TREE_CODE (type) == RECORD_TYPE
2232 || TREE_CODE (type) == UNION_TYPE
2233 || TREE_CODE (type) == QUAL_UNION_TYPE)
2234 && TYPE_NAME (type) == decl
2235 && !(use_gnu_debug_info_extensions && have_used_extensions)
2236 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
2237 /* Distinguish the implicit typedefs of C++
2238 from explicit ones that might be found in C. */
2239 && DECL_ARTIFICIAL (decl)
2240 /* Do not generate a tag for incomplete records. */
2241 && COMPLETE_TYPE_P (type)
2242 /* Do not generate a tag for records of variable size,
2243 since this type can not be properly described in the
2244 DBX format, and it confuses some tools such as objdump. */
2245 && host_integerp (TYPE_SIZE (type), 1))
2247 tree name = TYPE_NAME (type);
2248 if (TREE_CODE (name) == TYPE_DECL)
2249 name = DECL_NAME (name);
2251 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2252 current_sym_value = 0;
2253 current_sym_addr = 0;
2254 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
2256 fprintf (asmfile, "%s\"%s:T", ASM_STABS_OP,
2257 IDENTIFIER_POINTER (name));
2258 dbxout_type (type, 1);
2259 dbxout_finish_symbol (NULL_TREE);
2262 /* Output .stabs (or whatever) and leading double quote. */
2263 fprintf (asmfile, "%s\"", ASM_STABS_OP);
2265 if (use_gnu_debug_info_extensions)
2267 /* Output leading class/struct qualifiers. */
2268 dbxout_class_name_qualifiers (decl);
2271 /* Output typedef name. */
2272 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (decl)));
2274 /* Short cut way to output a tag also. */
2275 if ((TREE_CODE (type) == RECORD_TYPE
2276 || TREE_CODE (type) == UNION_TYPE
2277 || TREE_CODE (type) == QUAL_UNION_TYPE)
2278 && TYPE_NAME (type) == decl
2279 /* Distinguish the implicit typedefs of C++
2280 from explicit ones that might be found in C. */
2281 && DECL_ARTIFICIAL (decl))
2283 if (use_gnu_debug_info_extensions && have_used_extensions)
2285 putc ('T', asmfile);
2286 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
2288 #if 0 /* Now we generate the tag for this case up above. */
2294 putc ('t', asmfile);
2295 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2297 dbxout_type (type, 1);
2298 dbxout_finish_symbol (decl);
2302 /* Don't output a tag if this is an incomplete type. This prevents
2303 the sun4 Sun OS 4.x dbx from crashing. */
2305 if (tag_needed && TYPE_NAME (type) != 0
2306 && (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE
2307 || (DECL_NAME (TYPE_NAME (type)) != 0))
2308 && COMPLETE_TYPE_P (type)
2309 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
2311 /* For a TYPE_DECL with no name, but the type has a name,
2313 This is what represents `struct foo' with no typedef. */
2314 /* In C++, the name of a type is the corresponding typedef.
2315 In C, it is an IDENTIFIER_NODE. */
2316 tree name = TYPE_NAME (type);
2317 if (TREE_CODE (name) == TYPE_DECL)
2318 name = DECL_NAME (name);
2320 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2321 current_sym_value = 0;
2322 current_sym_addr = 0;
2323 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
2325 fprintf (asmfile, "%s\"%s:T", ASM_STABS_OP,
2326 IDENTIFIER_POINTER (name));
2327 dbxout_type (type, 1);
2328 dbxout_finish_symbol (NULL_TREE);
2332 /* If an enum type has no name, it cannot be referred to,
2333 but we must output it anyway, since the enumeration constants
2334 can be referred to. */
2335 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
2337 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
2338 current_sym_value = 0;
2339 current_sym_addr = 0;
2340 current_sym_nchars = 2;
2342 /* Some debuggers fail when given NULL names, so give this a
2343 harmless name of ` '. */
2344 fprintf (asmfile, "%s\" :T", ASM_STABS_OP);
2345 dbxout_type (type, 1);
2346 dbxout_finish_symbol (NULL_TREE);
2349 /* Prevent duplicate output of a typedef. */
2350 TREE_ASM_WRITTEN (decl) = 1;
2355 /* Parm decls go in their own separate chains
2356 and are output by dbxout_reg_parms and dbxout_parms. */
2360 /* Named return value, treat like a VAR_DECL. */
2362 if (! DECL_RTL_SET_P (decl))
2363 DBXOUT_DECR_NESTING_AND_RETURN (0);
2364 /* Don't mention a variable that is external.
2365 Let the file that defines it describe it. */
2366 if (DECL_EXTERNAL (decl))
2369 /* If the variable is really a constant
2370 and not written in memory, inform the debugger. */
2371 if (TREE_STATIC (decl) && TREE_READONLY (decl)
2372 && DECL_INITIAL (decl) != 0
2373 && host_integerp (DECL_INITIAL (decl), 0)
2374 && ! TREE_ASM_WRITTEN (decl)
2375 && (DECL_CONTEXT (decl) == NULL_TREE
2376 || TREE_CODE (DECL_CONTEXT (decl)) == BLOCK))
2378 if (TREE_PUBLIC (decl) == 0)
2380 /* The sun4 assembler does not grok this. */
2381 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
2383 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
2384 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
2386 HOST_WIDE_INT ival = tree_low_cst (DECL_INITIAL (decl), 0);
2387 fprintf (asmfile, "%s\"%s:c=i" HOST_WIDE_INT_PRINT_DEC
2389 ASM_STABS_OP, name, ival, N_LSYM);
2390 DBXOUT_DECR_NESTING;
2393 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
2395 /* don't know how to do this yet. */
2399 /* else it is something we handle like a normal variable. */
2402 SET_DECL_RTL (decl, eliminate_regs (DECL_RTL (decl), 0, NULL_RTX));
2403 #ifdef LEAF_REG_REMAP
2404 if (current_function_uses_only_leaf_regs)
2405 leaf_renumber_regs_insn (DECL_RTL (decl));
2408 result = dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
2414 DBXOUT_DECR_NESTING;
2418 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
2419 Add SUFFIX to its name, if SUFFIX is not 0.
2420 Describe the variable as residing in HOME
2421 (usually HOME is DECL_RTL (DECL), but not always).
2422 Returns 1 if the stab was really emitted. */
2425 dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home)
2430 emit_pending_bincls_if_required ();
2432 /* Don't mention a variable at all
2433 if it was completely optimized into nothingness.
2435 If the decl was from an inline function, then its rtl
2436 is not identically the rtl that was used in this
2437 particular compilation. */
2438 if (GET_CODE (home) == SUBREG)
2442 while (GET_CODE (value) == SUBREG)
2443 value = SUBREG_REG (value);
2444 if (GET_CODE (value) == REG)
2446 if (REGNO (value) >= FIRST_PSEUDO_REGISTER)
2449 home = alter_subreg (&home);
2451 if (GET_CODE (home) == REG)
2453 regno = REGNO (home);
2454 if (regno >= FIRST_PSEUDO_REGISTER)
2458 /* The kind-of-variable letter depends on where
2459 the variable is and on the scope of its name:
2460 G and N_GSYM for static storage and global scope,
2461 S for static storage and file scope,
2462 V for static storage and local scope,
2463 for those two, use N_LCSYM if data is in bss segment,
2464 N_STSYM if in data segment, N_FUN otherwise.
2465 (We used N_FUN originally, then changed to N_STSYM
2466 to please GDB. However, it seems that confused ld.
2467 Now GDB has been fixed to like N_FUN, says Kingdon.)
2468 no letter at all, and N_LSYM, for auto variable,
2469 r and N_RSYM for register variable. */
2471 if (GET_CODE (home) == MEM
2472 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
2474 if (TREE_PUBLIC (decl))
2477 current_sym_code = N_GSYM;
2481 current_sym_addr = XEXP (home, 0);
2483 letter = decl_function_context (decl) ? 'V' : 'S';
2485 /* This should be the same condition as in assemble_variable, but
2486 we don't have access to dont_output_data here. So, instead,
2487 we rely on the fact that error_mark_node initializers always
2488 end up in bss for C++ and never end up in bss for C. */
2489 if (DECL_INITIAL (decl) == 0
2490 || (!strcmp (lang_hooks.name, "GNU C++")
2491 && DECL_INITIAL (decl) == error_mark_node))
2492 current_sym_code = N_LCSYM;
2493 else if (DECL_IN_TEXT_SECTION (decl))
2494 /* This is not quite right, but it's the closest
2495 of all the codes that Unix defines. */
2496 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
2499 /* Some ports can transform a symbol ref into a label ref,
2500 because the symbol ref is too far away and has to be
2501 dumped into a constant pool. Alternatively, the symbol
2502 in the constant pool might be referenced by a different
2504 if (GET_CODE (current_sym_addr) == SYMBOL_REF
2505 && CONSTANT_POOL_ADDRESS_P (current_sym_addr))
2507 rtx tmp = get_pool_constant (current_sym_addr);
2509 if (GET_CODE (tmp) == SYMBOL_REF
2510 || GET_CODE (tmp) == LABEL_REF)
2511 current_sym_addr = tmp;
2514 /* Ultrix `as' seems to need this. */
2515 #ifdef DBX_STATIC_STAB_DATA_SECTION
2518 current_sym_code = N_STSYM;
2522 else if (regno >= 0)
2525 current_sym_code = N_RSYM;
2526 current_sym_value = DBX_REGISTER_NUMBER (regno);
2528 else if (GET_CODE (home) == MEM
2529 && (GET_CODE (XEXP (home, 0)) == MEM
2530 || (GET_CODE (XEXP (home, 0)) == REG
2531 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM
2532 && REGNO (XEXP (home, 0)) != STACK_POINTER_REGNUM
2533 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2534 && REGNO (XEXP (home, 0)) != ARG_POINTER_REGNUM
2537 /* If the value is indirect by memory or by a register
2538 that isn't the frame pointer
2539 then it means the object is variable-sized and address through
2540 that register or stack slot. DBX has no way to represent this
2541 so all we can do is output the variable as a pointer.
2542 If it's not a parameter, ignore it.
2543 (VAR_DECLs like this can be made by integrate.c.) */
2545 if (GET_CODE (XEXP (home, 0)) == REG)
2548 current_sym_code = N_RSYM;
2549 if (REGNO (XEXP (home, 0)) >= FIRST_PSEUDO_REGISTER)
2551 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
2555 current_sym_code = N_LSYM;
2556 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2557 We want the value of that CONST_INT. */
2559 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
2562 /* Effectively do build_pointer_type, but don't cache this type,
2563 since it might be temporary whereas the type it points to
2564 might have been saved for inlining. */
2565 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2566 type = make_node (POINTER_TYPE);
2567 TREE_TYPE (type) = TREE_TYPE (decl);
2569 else if (GET_CODE (home) == MEM
2570 && GET_CODE (XEXP (home, 0)) == REG)
2572 current_sym_code = N_LSYM;
2573 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2575 else if (GET_CODE (home) == MEM
2576 && GET_CODE (XEXP (home, 0)) == PLUS
2577 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
2579 current_sym_code = N_LSYM;
2580 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2581 We want the value of that CONST_INT. */
2582 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2584 else if (GET_CODE (home) == MEM
2585 && GET_CODE (XEXP (home, 0)) == CONST)
2587 /* Handle an obscure case which can arise when optimizing and
2588 when there are few available registers. (This is *always*
2589 the case for i386/i486 targets). The RTL looks like
2590 (MEM (CONST ...)) even though this variable is a local `auto'
2591 or a local `register' variable. In effect, what has happened
2592 is that the reload pass has seen that all assignments and
2593 references for one such a local variable can be replaced by
2594 equivalent assignments and references to some static storage
2595 variable, thereby avoiding the need for a register. In such
2596 cases we're forced to lie to debuggers and tell them that
2597 this variable was itself `static'. */
2598 current_sym_code = N_LCSYM;
2600 current_sym_addr = XEXP (XEXP (home, 0), 0);
2602 else if (GET_CODE (home) == CONCAT)
2606 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE,
2607 for example), then there is no easy way to figure out
2608 what SUBTYPE should be. So, we give up. */
2609 if (TREE_CODE (type) != COMPLEX_TYPE)
2612 subtype = TREE_TYPE (type);
2614 /* If the variable's storage is in two parts,
2615 output each as a separate stab with a modified name. */
2616 if (WORDS_BIG_ENDIAN)
2617 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
2619 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
2621 /* Cast avoids warning in old compilers. */
2622 current_sym_code = (STAB_CODE_TYPE) 0;
2623 current_sym_value = 0;
2624 current_sym_addr = 0;
2625 dbxout_prepare_symbol (decl);
2627 if (WORDS_BIG_ENDIAN)
2628 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
2630 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
2634 /* Address might be a MEM, when DECL is a variable-sized object.
2635 Or it might be const0_rtx, meaning previous passes
2636 want us to ignore this variable. */
2639 /* Ok, start a symtab entry and output the variable name. */
2642 #ifdef DBX_STATIC_BLOCK_START
2643 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
2646 dbxout_symbol_name (decl, suffix, letter);
2647 dbxout_type (type, 0);
2648 dbxout_finish_symbol (decl);
2650 #ifdef DBX_STATIC_BLOCK_END
2651 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
2656 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2657 Then output LETTER to indicate the kind of location the symbol has. */
2660 dbxout_symbol_name (tree decl, const char *suffix, int letter)
2664 if (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl)))
2665 /* One slight hitch: if this is a VAR_DECL which is a static
2666 class member, we must put out the mangled name instead of the
2667 DECL_NAME. Note also that static member (variable) names DO NOT begin
2668 with underscores in .stabs directives. */
2669 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
2671 /* ...but if we're function-local, we don't want to include the junk
2672 added by ASM_FORMAT_PRIVATE_NAME. */
2673 name = IDENTIFIER_POINTER (DECL_NAME (decl));
2677 fprintf (asmfile, "%s\"%s%s:", ASM_STABS_OP, name,
2678 (suffix ? suffix : ""));
2681 putc (letter, asmfile);
2685 dbxout_prepare_symbol (tree decl ATTRIBUTE_UNUSED)
2688 const char *filename = DECL_SOURCE_FILE (decl);
2690 dbxout_source_file (asmfile, filename);
2695 dbxout_finish_symbol (tree sym)
2697 #ifdef DBX_FINISH_SYMBOL
2698 DBX_FINISH_SYMBOL (sym);
2701 if (use_gnu_debug_info_extensions && sym != 0)
2702 line = DECL_SOURCE_LINE (sym);
2704 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2705 if (current_sym_addr)
2706 output_addr_const (asmfile, current_sym_addr);
2708 fprintf (asmfile, "%d", current_sym_value);
2709 putc ('\n', asmfile);
2713 /* Output definitions of all the decls in a chain. Return nonzero if
2714 anything was output */
2717 dbxout_syms (tree syms)
2722 result += dbxout_symbol (syms, 1);
2723 syms = TREE_CHAIN (syms);
2728 /* The following two functions output definitions of function parameters.
2729 Each parameter gets a definition locating it in the parameter list.
2730 Each parameter that is a register variable gets a second definition
2731 locating it in the register.
2733 Printing or argument lists in gdb uses the definitions that
2734 locate in the parameter list. But reference to the variable in
2735 expressions uses preferentially the definition as a register. */
2737 /* Output definitions, referring to storage in the parmlist,
2738 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2741 dbxout_parms (tree parms)
2745 emit_pending_bincls_if_required ();
2747 for (; parms; parms = TREE_CHAIN (parms))
2748 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2750 dbxout_prepare_symbol (parms);
2752 /* Perform any necessary register eliminations on the parameter's rtl,
2753 so that the debugging output will be accurate. */
2754 DECL_INCOMING_RTL (parms)
2755 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2756 SET_DECL_RTL (parms, eliminate_regs (DECL_RTL (parms), 0, NULL_RTX));
2757 #ifdef LEAF_REG_REMAP
2758 if (current_function_uses_only_leaf_regs)
2760 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2761 leaf_renumber_regs_insn (DECL_RTL (parms));
2765 if (PARM_PASSED_IN_MEMORY (parms))
2767 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2769 /* ??? Here we assume that the parm address is indexed
2770 off the frame pointer or arg pointer.
2771 If that is not true, we produce meaningless results,
2772 but do not crash. */
2773 if (GET_CODE (addr) == PLUS
2774 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2775 current_sym_value = INTVAL (XEXP (addr, 1));
2777 current_sym_value = 0;
2779 current_sym_code = N_PSYM;
2780 current_sym_addr = 0;
2783 if (DECL_NAME (parms))
2785 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2787 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2788 IDENTIFIER_POINTER (DECL_NAME (parms)),
2789 DBX_MEMPARM_STABS_LETTER);
2793 current_sym_nchars = 8;
2794 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2795 DBX_MEMPARM_STABS_LETTER);
2798 /* It is quite tempting to use:
2800 dbxout_type (TREE_TYPE (parms), 0);
2802 as the next statement, rather than using DECL_ARG_TYPE(), so
2803 that gcc reports the actual type of the parameter, rather
2804 than the promoted type. This certainly makes GDB's life
2805 easier, at least for some ports. The change is a bad idea
2806 however, since GDB expects to be able access the type without
2807 performing any conversions. So for example, if we were
2808 passing a float to an unprototyped function, gcc will store a
2809 double on the stack, but if we emit a stab saying the type is a
2810 float, then gdb will only read in a single value, and this will
2811 produce an erroneous value. */
2812 dbxout_type (DECL_ARG_TYPE (parms), 0);
2813 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2814 dbxout_finish_symbol (parms);
2816 else if (GET_CODE (DECL_RTL (parms)) == REG)
2819 char regparm_letter;
2821 /* Parm passed in registers and lives in registers or nowhere. */
2823 current_sym_code = DBX_REGPARM_STABS_CODE;
2824 regparm_letter = DBX_REGPARM_STABS_LETTER;
2825 current_sym_addr = 0;
2827 /* If parm lives in a register, use that register;
2828 pretend the parm was passed there. It would be more consistent
2829 to describe the register where the parm was passed,
2830 but in practice that register usually holds something else.
2832 If we use DECL_RTL, then we must use the declared type of
2833 the variable, not the type that it arrived in. */
2834 if (REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2836 best_rtl = DECL_RTL (parms);
2837 parm_type = TREE_TYPE (parms);
2839 /* If the parm lives nowhere, use the register where it was
2840 passed. It is also better to use the declared type here. */
2843 best_rtl = DECL_INCOMING_RTL (parms);
2844 parm_type = TREE_TYPE (parms);
2846 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2849 if (DECL_NAME (parms))
2851 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2852 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2853 IDENTIFIER_POINTER (DECL_NAME (parms)),
2858 current_sym_nchars = 8;
2859 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2863 dbxout_type (parm_type, 0);
2864 dbxout_finish_symbol (parms);
2866 else if (GET_CODE (DECL_RTL (parms)) == MEM
2867 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2868 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2869 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2870 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2871 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2875 /* Parm was passed via invisible reference.
2876 That is, its address was passed in a register.
2877 Output it as if it lived in that register.
2878 The debugger will know from the type
2879 that it was actually passed by invisible reference. */
2881 char regparm_letter;
2882 /* Parm passed in registers and lives in registers or nowhere. */
2884 current_sym_code = DBX_REGPARM_STABS_CODE;
2885 if (use_gnu_debug_info_extensions)
2886 regparm_letter = GDB_INV_REF_REGPARM_STABS_LETTER;
2888 regparm_letter = DBX_REGPARM_STABS_LETTER;
2890 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2891 If it is an unallocated pseudo-reg, then use the register where
2892 it was passed instead. */
2893 if (REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2894 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2896 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2898 current_sym_addr = 0;
2901 if (DECL_NAME (parms))
2904 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2906 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2907 IDENTIFIER_POINTER (DECL_NAME (parms)),
2912 current_sym_nchars = 8;
2913 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2917 dbxout_type (TREE_TYPE (parms), 0);
2918 dbxout_finish_symbol (parms);
2920 else if (GET_CODE (DECL_RTL (parms)) == MEM
2921 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2923 /* Parm was passed via invisible reference, with the reference
2924 living on the stack. DECL_RTL looks like
2925 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it
2926 could look like (MEM (MEM (REG))). */
2927 const char *const decl_name = (DECL_NAME (parms)
2928 ? IDENTIFIER_POINTER (DECL_NAME (parms))
2930 if (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 0)) == REG)
2931 current_sym_value = 0;
2934 = INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms), 0), 0), 1));
2935 current_sym_addr = 0;
2936 current_sym_code = N_PSYM;
2939 fprintf (asmfile, "%s\"%s:v", ASM_STABS_OP, decl_name);
2942 = DEBUGGER_ARG_OFFSET (current_sym_value,
2943 XEXP (XEXP (DECL_RTL (parms), 0), 0));
2944 dbxout_type (TREE_TYPE (parms), 0);
2945 dbxout_finish_symbol (parms);
2947 else if (GET_CODE (DECL_RTL (parms)) == MEM
2948 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2949 /* ??? A constant address for a parm can happen
2950 when the reg it lives in is equiv to a constant in memory.
2951 Should make this not happen, after 2.4. */
2952 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2954 /* Parm was passed in registers but lives on the stack. */
2956 current_sym_code = N_PSYM;
2957 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2958 in which case we want the value of that CONST_INT,
2960 in which case we use a value of zero. */
2961 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2962 current_sym_value = 0;
2965 = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2967 current_sym_addr = 0;
2969 /* Make a big endian correction if the mode of the type of the
2970 parameter is not the same as the mode of the rtl. */
2971 if (BYTES_BIG_ENDIAN
2972 && TYPE_MODE (TREE_TYPE (parms)) != GET_MODE (DECL_RTL (parms))
2973 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms))) < UNITS_PER_WORD)
2975 current_sym_value +=
2976 GET_MODE_SIZE (GET_MODE (DECL_RTL (parms)))
2977 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms)));
2981 if (DECL_NAME (parms))
2984 = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2986 fprintf (asmfile, "%s\"%s:%c", ASM_STABS_OP,
2987 IDENTIFIER_POINTER (DECL_NAME (parms)),
2988 DBX_MEMPARM_STABS_LETTER);
2992 current_sym_nchars = 8;
2993 fprintf (asmfile, "%s\"(anon):%c", ASM_STABS_OP,
2994 DBX_MEMPARM_STABS_LETTER);
2998 = DEBUGGER_ARG_OFFSET (current_sym_value,
2999 XEXP (DECL_RTL (parms), 0));
3000 dbxout_type (TREE_TYPE (parms), 0);
3001 dbxout_finish_symbol (parms);
3004 DBXOUT_DECR_NESTING;
3007 /* Output definitions for the places where parms live during the function,
3008 when different from where they were passed, when the parms were passed
3011 It is not useful to do this for parms passed in registers
3012 that live during the function in different registers, because it is
3013 impossible to look in the passed register for the passed value,
3014 so we use the within-the-function register to begin with.
3016 PARMS is a chain of PARM_DECL nodes. */
3019 dbxout_reg_parms (tree parms)
3023 for (; parms; parms = TREE_CHAIN (parms))
3024 if (DECL_NAME (parms) && PARM_PASSED_IN_MEMORY (parms))
3026 dbxout_prepare_symbol (parms);
3028 /* Report parms that live in registers during the function
3029 but were passed in memory. */
3030 if (GET_CODE (DECL_RTL (parms)) == REG
3031 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
3032 dbxout_symbol_location (parms, TREE_TYPE (parms),
3033 0, DECL_RTL (parms));
3034 else if (GET_CODE (DECL_RTL (parms)) == CONCAT)
3035 dbxout_symbol_location (parms, TREE_TYPE (parms),
3036 0, DECL_RTL (parms));
3037 /* Report parms that live in memory but not where they were passed. */
3038 else if (GET_CODE (DECL_RTL (parms)) == MEM
3039 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
3040 dbxout_symbol_location (parms, TREE_TYPE (parms),
3041 0, DECL_RTL (parms));
3043 DBXOUT_DECR_NESTING;
3046 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
3047 output definitions of those names, in raw form */
3050 dbxout_args (tree args)
3054 putc (',', asmfile);
3055 dbxout_type (TREE_VALUE (args), 0);
3057 args = TREE_CHAIN (args);
3061 /* Output everything about a symbol block (a BLOCK node
3062 that represents a scope level),
3063 including recursive output of contained blocks.
3065 BLOCK is the BLOCK node.
3066 DEPTH is its depth within containing symbol blocks.
3067 ARGS is usually zero; but for the outermost block of the
3068 body of a function, it is a chain of PARM_DECLs for the function parameters.
3069 We output definitions of all the register parms
3070 as if they were local variables of that block.
3072 If -g1 was used, we count blocks just the same, but output nothing
3073 except for the outermost block.
3075 Actually, BLOCK may be several blocks chained together.
3076 We handle them all in sequence. */
3079 dbxout_block (tree block, int depth, tree args)
3083 #if DBX_BLOCKS_FUNCTION_RELATIVE
3084 const char *begin_label;
3085 if (current_function_func_begin_label != NULL_TREE)
3086 begin_label = IDENTIFIER_POINTER (current_function_func_begin_label);
3088 begin_label = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
3093 /* Ignore blocks never expanded or otherwise marked as real. */
3094 if (TREE_USED (block) && TREE_ASM_WRITTEN (block))
3098 /* In dbx format, the syms of a block come before the N_LBRAC.
3099 If nothing is output, we don't need the N_LBRAC, either. */
3101 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
3102 did_output = dbxout_syms (BLOCK_VARS (block));
3104 dbxout_reg_parms (args);
3106 /* Now output an N_LBRAC symbol to represent the beginning of
3107 the block. Use the block's tree-walk order to generate
3108 the assembler symbols LBBn and LBEn
3109 that final will define around the code in this block. */
3110 if (depth > 0 && did_output)
3113 blocknum = BLOCK_NUMBER (block);
3114 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
3116 if (BLOCK_HANDLER_BLOCK (block))
3118 /* A catch block. Must precede N_LBRAC. */
3119 tree decl = BLOCK_VARS (block);
3122 fprintf (asmfile, "%s\"%s:C1\",%d,0,0,", ASM_STABS_OP,
3123 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
3124 assemble_name (asmfile, buf);
3125 fprintf (asmfile, "\n");
3126 decl = TREE_CHAIN (decl);
3130 #ifdef DBX_OUTPUT_LBRAC
3131 DBX_OUTPUT_LBRAC (asmfile, buf);
3133 fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_LBRAC);
3134 assemble_name (asmfile, buf);
3135 #if DBX_BLOCKS_FUNCTION_RELATIVE
3136 putc ('-', asmfile);
3137 assemble_name (asmfile, begin_label);
3139 fprintf (asmfile, "\n");
3143 /* Output the subblocks. */
3144 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
3146 /* Refer to the marker for the end of the block. */
3147 if (depth > 0 && did_output)
3150 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
3151 #ifdef DBX_OUTPUT_RBRAC
3152 DBX_OUTPUT_RBRAC (asmfile, buf);
3154 fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_RBRAC);
3155 assemble_name (asmfile, buf);
3156 #if DBX_BLOCKS_FUNCTION_RELATIVE
3157 putc ('-', asmfile);
3158 assemble_name (asmfile, begin_label);
3160 fprintf (asmfile, "\n");
3164 block = BLOCK_CHAIN (block);
3168 /* Output the information about a function and its arguments and result.
3169 Usually this follows the function's code,
3170 but on some systems, it comes before. */
3172 #if defined (DBX_DEBUGGING_INFO)
3174 dbxout_begin_function (tree decl)
3176 int saved_tree_used1 = TREE_USED (decl);
3177 TREE_USED (decl) = 1;
3178 if (DECL_NAME (DECL_RESULT (decl)) != 0)
3180 int saved_tree_used2 = TREE_USED (DECL_RESULT (decl));
3181 TREE_USED (DECL_RESULT (decl)) = 1;
3182 dbxout_symbol (decl, 0);
3183 TREE_USED (DECL_RESULT (decl)) = saved_tree_used2;
3186 dbxout_symbol (decl, 0);
3187 TREE_USED (decl) = saved_tree_used1;
3189 dbxout_parms (DECL_ARGUMENTS (decl));
3190 if (DECL_NAME (DECL_RESULT (decl)) != 0)
3191 dbxout_symbol (DECL_RESULT (decl), 1);
3193 #endif /* DBX_DEBUGGING_INFO */
3195 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
3197 #include "gt-dbxout.h"