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, 2005 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"
90 #include "langhooks.h"
93 #ifdef XCOFF_DEBUGGING_INFO
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 #define DBXOUT_DECR_NESTING_AND_RETURN(x) \
102 do {--debug_nesting; return (x);} while (0)
105 # ifdef XCOFF_DEBUGGING_INFO
106 # define ASM_STABS_OP "\t.stabx\t"
108 # define ASM_STABS_OP "\t.stabs\t"
113 #define ASM_STABN_OP "\t.stabn\t"
117 #define ASM_STABD_OP "\t.stabd\t"
120 #ifndef DBX_TYPE_DECL_STABS_CODE
121 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
124 #ifndef DBX_STATIC_CONST_VAR_CODE
125 #define DBX_STATIC_CONST_VAR_CODE N_FUN
128 #ifndef DBX_REGPARM_STABS_CODE
129 #define DBX_REGPARM_STABS_CODE N_RSYM
132 #ifndef DBX_REGPARM_STABS_LETTER
133 #define DBX_REGPARM_STABS_LETTER 'P'
136 #ifndef NO_DBX_FUNCTION_END
137 #define NO_DBX_FUNCTION_END 0
140 #ifndef NO_DBX_BNSYM_ENSYM
141 #define NO_DBX_BNSYM_ENSYM 0
144 #ifndef NO_DBX_MAIN_SOURCE_DIRECTORY
145 #define NO_DBX_MAIN_SOURCE_DIRECTORY 0
148 #ifndef DBX_BLOCKS_FUNCTION_RELATIVE
149 #define DBX_BLOCKS_FUNCTION_RELATIVE 0
152 #ifndef DBX_LINES_FUNCTION_RELATIVE
153 #define DBX_LINES_FUNCTION_RELATIVE 0
156 #ifndef DBX_CONTIN_LENGTH
157 #define DBX_CONTIN_LENGTH 80
160 #ifndef DBX_CONTIN_CHAR
161 #define DBX_CONTIN_CHAR '\\'
164 enum typestatus
{TYPE_UNSEEN
, TYPE_XREF
, TYPE_DEFINED
};
166 /* Structure recording information about a C data type.
167 The status element says whether we have yet output
168 the definition of the type. TYPE_XREF says we have
169 output it as a cross-reference only.
170 The file_number and type_number elements are used if DBX_USE_BINCL
173 struct typeinfo
GTY(())
175 enum typestatus status
;
180 /* Vector recording information about C data types.
181 When we first notice a data type (a tree node),
182 we assign it a number using next_type_number.
183 That is its index in this vector. */
185 static GTY ((length ("typevec_len"))) struct typeinfo
*typevec
;
187 /* Number of elements of space allocated in `typevec'. */
189 static GTY(()) int typevec_len
;
191 /* In dbx output, each type gets a unique number.
192 This is the number for the next type output.
193 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
195 static GTY(()) int next_type_number
;
197 /* The C front end may call dbxout_symbol before dbxout_init runs.
198 We save all such decls in this list and output them when we get
201 static GTY(()) tree preinit_symbols
;
203 enum binclstatus
{BINCL_NOT_REQUIRED
, BINCL_PENDING
, BINCL_PROCESSED
};
205 /* When using N_BINCL in dbx output, each type number is actually a
206 pair of the file number and the type number within the file.
207 This is a stack of input files. */
211 struct dbx_file
*next
;
213 int next_type_number
;
214 enum binclstatus bincl_status
; /* Keep track of lazy bincl. */
215 const char *pending_bincl_name
; /* Name of bincl. */
216 struct dbx_file
*prev
; /* Chain to traverse all pending bincls. */
219 /* This is the top of the stack.
221 This is not saved for PCH, because restoring a PCH should not change it.
222 next_file_number does have to be saved, because the PCH may use some
223 file numbers; however, just before restoring a PCH, next_file_number
224 should always be 0 because we should not have needed any file numbers
227 #if (defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)) \
228 && defined (DBX_USE_BINCL)
229 static struct dbx_file
*current_file
;
232 /* This is the next file number to use. */
234 static GTY(()) int next_file_number
;
236 /* A counter for dbxout_function_end. */
238 static GTY(()) int scope_labelno
;
240 /* A counter for dbxout_source_line. */
242 static GTY(()) int dbxout_source_line_counter
;
244 /* Nonzero if we have actually used any of the GDB extensions
245 to the debugging format. The idea is that we use them for the
246 first time only if there's a strong reason, but once we have done that,
247 we use them whenever convenient. */
249 static GTY(()) int have_used_extensions
= 0;
251 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
252 for the N_SO filename stabs label. */
254 static GTY(()) int source_label_number
= 1;
256 /* Last source file name mentioned in a NOTE insn. */
258 static GTY(()) const char *lastfile
;
260 /* Used by PCH machinery to detect if 'lastfile' should be reset to
262 static GTY(()) int lastfile_is_base
;
264 /* Typical USG systems don't have stab.h, and they also have
265 no use for DBX-format debugging info. */
267 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
270 /* If zero then there is no pending BINCL. */
271 static int pending_bincls
= 0;
274 /* The original input file name. */
275 static const char *base_input_file
;
277 #ifdef DEBUG_SYMS_TEXT
278 #define FORCE_TEXT function_section (current_function_decl);
285 #define STAB_CODE_TYPE enum __stab_debug_code
287 /* 1 if PARM is passed to this function in memory. */
289 #define PARM_PASSED_IN_MEMORY(PARM) \
290 (MEM_P (DECL_INCOMING_RTL (PARM)))
292 /* A C expression for the integer offset value of an automatic variable
293 (N_LSYM) having address X (an RTX). */
294 #ifndef DEBUGGER_AUTO_OFFSET
295 #define DEBUGGER_AUTO_OFFSET(X) \
296 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
299 /* A C expression for the integer offset value of an argument (N_PSYM)
300 having address X (an RTX). The nominal offset is OFFSET. */
301 #ifndef DEBUGGER_ARG_OFFSET
302 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
305 /* This obstack holds the stab string currently being constructed. We
306 build it up here, then write it out, so we can split long lines up
307 properly (see dbxout_finish_complex_stabs). */
308 static struct obstack stabstr_ob
;
309 static size_t stabstr_last_contin_point
;
312 static void emit_bincl_stab (const char *c
);
313 static void emit_pending_bincls (void);
315 static inline void emit_pending_bincls_if_required (void);
317 static void dbxout_init (const char *);
319 static void dbxout_finish (const char *);
320 static void dbxout_start_source_file (unsigned, const char *);
321 static void dbxout_end_source_file (unsigned);
322 static void dbxout_typedefs (tree
);
323 static void dbxout_type_index (tree
);
324 static void dbxout_args (tree
);
325 static void dbxout_type_fields (tree
);
326 static void dbxout_type_method_1 (tree
);
327 static void dbxout_type_methods (tree
);
328 static void dbxout_range_type (tree
);
329 static void dbxout_type (tree
, int);
330 static bool print_int_cst_bounds_in_octal_p (tree
);
331 static void dbxout_type_name (tree
);
332 static void dbxout_class_name_qualifiers (tree
);
333 static int dbxout_symbol_location (tree
, tree
, const char *, rtx
);
334 static void dbxout_symbol_name (tree
, const char *, int);
335 static void dbxout_block (tree
, int, tree
);
336 static void dbxout_global_decl (tree
);
337 static void dbxout_type_decl (tree
, int);
338 static void dbxout_handle_pch (unsigned);
340 /* The debug hooks structure. */
341 #if defined (DBX_DEBUGGING_INFO)
343 static void dbxout_source_line (unsigned int, const char *);
344 static void dbxout_begin_prologue (unsigned int, const char *);
345 static void dbxout_source_file (const char *);
346 static void dbxout_function_end (tree
);
347 static void dbxout_begin_function (tree
);
348 static void dbxout_begin_block (unsigned, unsigned);
349 static void dbxout_end_block (unsigned, unsigned);
350 static void dbxout_function_decl (tree
);
352 const struct gcc_debug_hooks dbx_debug_hooks
=
356 debug_nothing_int_charstar
,
357 debug_nothing_int_charstar
,
358 dbxout_start_source_file
,
359 dbxout_end_source_file
,
362 debug_true_tree
, /* ignore_block */
363 dbxout_source_line
, /* source_line */
364 dbxout_begin_prologue
, /* begin_prologue */
365 debug_nothing_int_charstar
, /* end_prologue */
366 debug_nothing_int_charstar
, /* end_epilogue */
367 #ifdef DBX_FUNCTION_FIRST
368 dbxout_begin_function
,
370 debug_nothing_tree
, /* begin_function */
372 debug_nothing_int
, /* end_function */
373 dbxout_function_decl
,
374 dbxout_global_decl
, /* global_decl */
375 dbxout_type_decl
, /* type_decl */
376 debug_nothing_tree_tree
, /* imported_module_or_decl */
377 debug_nothing_tree
, /* deferred_inline_function */
378 debug_nothing_tree
, /* outlining_inline_function */
379 debug_nothing_rtx
, /* label */
380 dbxout_handle_pch
, /* handle_pch */
381 debug_nothing_rtx
/* var_location */
383 #endif /* DBX_DEBUGGING_INFO */
385 #if defined (XCOFF_DEBUGGING_INFO)
386 const struct gcc_debug_hooks xcoff_debug_hooks
=
390 debug_nothing_int_charstar
,
391 debug_nothing_int_charstar
,
392 dbxout_start_source_file
,
393 dbxout_end_source_file
,
394 xcoffout_begin_block
,
396 debug_true_tree
, /* ignore_block */
397 xcoffout_source_line
,
398 xcoffout_begin_prologue
, /* begin_prologue */
399 debug_nothing_int_charstar
, /* end_prologue */
400 xcoffout_end_epilogue
,
401 debug_nothing_tree
, /* begin_function */
402 xcoffout_end_function
,
403 debug_nothing_tree
, /* function_decl */
404 dbxout_global_decl
, /* global_decl */
405 dbxout_type_decl
, /* type_decl */
406 debug_nothing_tree_tree
, /* imported_module_or_decl */
407 debug_nothing_tree
, /* deferred_inline_function */
408 debug_nothing_tree
, /* outlining_inline_function */
409 debug_nothing_rtx
, /* label */
410 dbxout_handle_pch
, /* handle_pch */
411 debug_nothing_rtx
/* var_location */
413 #endif /* XCOFF_DEBUGGING_INFO */
415 /* Numeric formatting helper macro. Note that this does not handle
417 #define NUMBER_FMT_LOOP(P, NUM, BASE) \
420 int digit = NUM % BASE; \
422 *--P = digit + '0'; \
426 /* Utility: write a decimal integer NUM to asm_out_file. */
431 char *p
= buf
+ sizeof buf
;
436 putc ('0', asm_out_file
);
441 putc ('-', asm_out_file
);
447 NUMBER_FMT_LOOP (p
, unum
, 10);
449 while (p
< buf
+ sizeof buf
)
451 putc (*p
, asm_out_file
);
457 /* Primitives for emitting simple stabs directives. All other stabs
458 routines should use these functions instead of directly emitting
459 stabs. They are exported because machine-dependent code may need
460 to invoke them, e.g. in a DBX_OUTPUT_* macro whose definition
461 forwards to code in CPU.c. */
463 /* The following functions should all be called immediately after one
464 of the dbxout_begin_stab* functions (below). They write out
465 various things as the value of a stab. */
467 /* Write out a literal zero as the value of a stab. */
469 dbxout_stab_value_zero (void)
471 fputs ("0\n", asm_out_file
);
474 /* Write out the label LABEL as the value of a stab. */
476 dbxout_stab_value_label (const char *label
)
478 assemble_name (asm_out_file
, label
);
479 putc ('\n', asm_out_file
);
482 /* Write out the difference of two labels, LABEL - BASE, as the value
485 dbxout_stab_value_label_diff (const char *label
, const char *base
)
487 assemble_name (asm_out_file
, label
);
488 putc ('-', asm_out_file
);
489 assemble_name (asm_out_file
, base
);
490 putc ('\n', asm_out_file
);
493 /* Write out an internal label as the value of a stab, and immediately
494 emit that internal label. This should be used only when
495 dbxout_stabd will not work. STEM is the name stem of the label,
496 COUNTERP is a pointer to a counter variable which will be used to
497 guarantee label uniqueness. */
499 dbxout_stab_value_internal_label (const char *stem
, int *counterp
)
502 int counter
= counterp
? (*counterp
)++ : 0;
504 ASM_GENERATE_INTERNAL_LABEL (label
, stem
, counter
);
505 dbxout_stab_value_label (label
);
506 targetm
.asm_out
.internal_label (asm_out_file
, stem
, counter
);
509 /* Write out the difference between BASE and an internal label as the
510 value of a stab, and immediately emit that internal label. STEM and
511 COUNTERP are as for dbxout_stab_value_internal_label. */
513 dbxout_stab_value_internal_label_diff (const char *stem
, int *counterp
,
517 int counter
= counterp
? (*counterp
)++ : 0;
519 ASM_GENERATE_INTERNAL_LABEL (label
, stem
, counter
);
520 dbxout_stab_value_label_diff (label
, base
);
521 targetm
.asm_out
.internal_label (asm_out_file
, stem
, counter
);
524 /* The following functions produce specific kinds of stab directives. */
526 /* Write a .stabd directive with type STYPE and desc SDESC to asm_out_file. */
528 dbxout_stabd (int stype
, int sdesc
)
530 fputs (ASM_STABD_OP
, asm_out_file
);
532 fputs (",0,", asm_out_file
);
534 putc ('\n', asm_out_file
);
537 /* Write a .stabn directive with type STYPE. This function stops
538 short of emitting the value field, which is the responsibility of
539 the caller (normally it will be either a symbol or the difference
543 dbxout_begin_stabn (int stype
)
545 fputs (ASM_STABN_OP
, asm_out_file
);
547 fputs (",0,0,", asm_out_file
);
550 /* Write a .stabn directive with type N_SLINE and desc LINE. As above,
551 the value field is the responsibility of the caller. */
553 dbxout_begin_stabn_sline (int lineno
)
555 fputs (ASM_STABN_OP
, asm_out_file
);
556 dbxout_int (N_SLINE
);
557 fputs (",0,", asm_out_file
);
559 putc (',', asm_out_file
);
562 /* Begin a .stabs directive with string "", type STYPE, and desc and
563 other fields 0. The value field is the responsibility of the
564 caller. This function cannot be used for .stabx directives. */
566 dbxout_begin_empty_stabs (int stype
)
568 fputs (ASM_STABS_OP
, asm_out_file
);
569 fputs ("\"\",", asm_out_file
);
571 fputs (",0,0,", asm_out_file
);
574 /* Begin a .stabs directive with string STR, type STYPE, and desc 0.
575 The value field is the responsibility of the caller. */
577 dbxout_begin_simple_stabs (const char *str
, int stype
)
579 fputs (ASM_STABS_OP
, asm_out_file
);
580 output_quoted_string (asm_out_file
, str
);
581 putc (',', asm_out_file
);
583 fputs (",0,0,", asm_out_file
);
586 /* As above but use SDESC for the desc field. */
588 dbxout_begin_simple_stabs_desc (const char *str
, int stype
, int sdesc
)
590 fputs (ASM_STABS_OP
, asm_out_file
);
591 output_quoted_string (asm_out_file
, str
);
592 putc (',', asm_out_file
);
594 fputs (",0,", asm_out_file
);
596 putc (',', asm_out_file
);
599 /* The next set of functions are entirely concerned with production of
600 "complex" .stabs directives: that is, .stabs directives whose
601 strings have to be constructed piecemeal. dbxout_type,
602 dbxout_symbol, etc. use these routines heavily. The string is queued
603 up in an obstack, then written out by dbxout_finish_complex_stabs, which
604 is also responsible for splitting it up if it exceeds DBX_CONTIN_LENGTH.
605 (You might think it would be more efficient to go straight to stdio
606 when DBX_CONTIN_LENGTH is 0 (i.e. no length limit) but that turns
607 out not to be the case, and anyway this needs fewer #ifdefs.) */
609 /* Begin a complex .stabs directive. If we can, write the initial
610 ASM_STABS_OP to the asm_out_file. */
613 dbxout_begin_complex_stabs (void)
615 emit_pending_bincls_if_required ();
617 fputs (ASM_STABS_OP
, asm_out_file
);
618 putc ('"', asm_out_file
);
619 gcc_assert (stabstr_last_contin_point
== 0);
622 /* As above, but do not force text or emit pending bincls. This is
623 used by dbxout_symbol_location, which needs to do something else. */
625 dbxout_begin_complex_stabs_noforcetext (void)
627 fputs (ASM_STABS_OP
, asm_out_file
);
628 putc ('"', asm_out_file
);
629 gcc_assert (stabstr_last_contin_point
== 0);
632 /* Add CHR, a single character, to the string being built. */
633 #define stabstr_C(chr) obstack_1grow (&stabstr_ob, chr)
635 /* Add STR, a normal C string, to the string being built. */
636 #define stabstr_S(str) obstack_grow (&stabstr_ob, str, strlen(str))
638 /* Add the text of ID, an IDENTIFIER_NODE, to the string being built. */
639 #define stabstr_I(id) obstack_grow (&stabstr_ob, \
640 IDENTIFIER_POINTER (id), \
641 IDENTIFIER_LENGTH (id))
643 /* Add NUM, a signed decimal number, to the string being built. */
645 stabstr_D (HOST_WIDE_INT num
)
648 char *p
= buf
+ sizeof buf
;
664 NUMBER_FMT_LOOP (p
, unum
, 10);
666 obstack_grow (&stabstr_ob
, p
, (buf
+ sizeof buf
) - p
);
669 /* Add NUM, an unsigned decimal number, to the string being built. */
671 stabstr_U (unsigned HOST_WIDE_INT num
)
674 char *p
= buf
+ sizeof buf
;
680 NUMBER_FMT_LOOP (p
, num
, 10);
681 obstack_grow (&stabstr_ob
, p
, (buf
+ sizeof buf
) - p
);
684 /* Add CST, an INTEGER_CST tree, to the string being built as an
685 unsigned octal number. This routine handles values which are
686 larger than a single HOST_WIDE_INT. */
690 unsigned HOST_WIDE_INT high
= TREE_INT_CST_HIGH (cst
);
691 unsigned HOST_WIDE_INT low
= TREE_INT_CST_LOW (cst
);
694 char *p
= buf
+ sizeof buf
;
696 /* GDB wants constants with no extra leading "1" bits, so
697 we need to remove any sign-extension that might be
700 const unsigned int width
= TYPE_PRECISION (TREE_TYPE (cst
));
701 if (width
== HOST_BITS_PER_WIDE_INT
* 2)
703 else if (width
> HOST_BITS_PER_WIDE_INT
)
704 high
&= (((HOST_WIDE_INT
) 1 << (width
- HOST_BITS_PER_WIDE_INT
)) - 1);
705 else if (width
== HOST_BITS_PER_WIDE_INT
)
708 high
= 0, low
&= (((HOST_WIDE_INT
) 1 << width
) - 1);
711 /* Leading zero for base indicator. */
714 /* If the value is zero, the base indicator will serve as the value
716 if (high
== 0 && low
== 0)
719 /* If the high half is zero, we need only print the low half normally. */
721 NUMBER_FMT_LOOP (p
, low
, 8);
724 /* When high != 0, we need to print enough zeroes from low to
725 give the digits from high their proper place-values. Hence
726 NUMBER_FMT_LOOP cannot be used. */
727 const int n_digits
= HOST_BITS_PER_WIDE_INT
/ 3;
730 for (i
= 1; i
<= n_digits
; i
++)
732 unsigned int digit
= low
% 8;
737 /* Octal digits carry exactly three bits of information. The
738 width of a HOST_WIDE_INT is not normally a multiple of three.
739 Therefore, the next digit printed probably needs to carry
740 information from both low and high. */
741 if (HOST_BITS_PER_WIDE_INT
% 3 != 0)
743 const int n_leftover_bits
= HOST_BITS_PER_WIDE_INT
% 3;
744 const int n_bits_from_high
= 3 - n_leftover_bits
;
746 const unsigned HOST_WIDE_INT
747 low_mask
= (((unsigned HOST_WIDE_INT
)1) << n_leftover_bits
) - 1;
748 const unsigned HOST_WIDE_INT
749 high_mask
= (((unsigned HOST_WIDE_INT
)1) << n_bits_from_high
) - 1;
753 /* At this point, only the bottom n_leftover_bits bits of low
755 gcc_assert (!(low
& ~low_mask
));
757 digit
= (low
| ((high
& high_mask
) << n_leftover_bits
));
758 high
>>= n_bits_from_high
;
763 /* Now we can format high in the normal manner. However, if
764 the only bits of high that were set were handled by the
765 digit split between low and high, high will now be zero, and
766 we don't want to print extra digits in that case. */
768 NUMBER_FMT_LOOP (p
, high
, 8);
771 obstack_grow (&stabstr_ob
, p
, (buf
+ sizeof buf
) - p
);
774 /* Called whenever it is safe to break a stabs string into multiple
775 .stabs directives. If the current string has exceeded the limit
776 set by DBX_CONTIN_LENGTH, mark the current position in the buffer
777 as a continuation point by inserting DBX_CONTIN_CHAR (doubled if
778 it is a backslash) and a null character. */
780 stabstr_continue (void)
782 if (DBX_CONTIN_LENGTH
> 0
783 && obstack_object_size (&stabstr_ob
) - stabstr_last_contin_point
786 if (DBX_CONTIN_CHAR
== '\\')
787 obstack_1grow (&stabstr_ob
, '\\');
788 obstack_1grow (&stabstr_ob
, DBX_CONTIN_CHAR
);
789 obstack_1grow (&stabstr_ob
, '\0');
790 stabstr_last_contin_point
= obstack_object_size (&stabstr_ob
);
793 #define CONTIN stabstr_continue ()
795 /* Macro subroutine of dbxout_finish_complex_stabs, which emits
796 all of the arguments to the .stabs directive after the string.
797 Overridden by xcoffout.h. CODE is the stabs code for this symbol;
798 LINE is the source line to write into the desc field (in extended
799 mode); SYM is the symbol itself.
801 ADDR, LABEL, and NUMBER are three different ways to represent the
802 stabs value field. At most one of these should be nonzero.
804 ADDR is used most of the time; it represents the value as an
805 RTL address constant.
807 LABEL is used (currently) only for N_CATCH stabs; it represents
808 the value as a string suitable for assemble_name.
810 NUMBER is used when the value is an offset from an implicit base
811 pointer (e.g. for a stack variable), or an index (e.g. for a
812 register variable). It represents the value as a decimal integer. */
814 #ifndef DBX_FINISH_STABS
815 #define DBX_FINISH_STABS(SYM, CODE, LINE, ADDR, LABEL, NUMBER) \
817 int line_ = use_gnu_debug_info_extensions ? LINE : 0; \
820 fputs (",0,", asm_out_file); \
821 dbxout_int (line_); \
822 putc (',', asm_out_file); \
824 output_addr_const (asm_out_file, ADDR); \
826 assemble_name (asm_out_file, LABEL); \
828 dbxout_int (NUMBER); \
829 putc ('\n', asm_out_file); \
833 /* Finish the emission of a complex .stabs directive. When DBX_CONTIN_LENGTH
834 is zero, this has only to emit the close quote and the remainder of
835 the arguments. When it is nonzero, the string has been marshalled in
836 stabstr_ob, and this routine is responsible for breaking it up into
837 DBX_CONTIN_LENGTH-sized chunks.
839 SYM is the DECL of the symbol under consideration; it is used only
840 for its DECL_SOURCE_LINE. The other arguments are all passed directly
841 to DBX_FINISH_STABS; see above for details. */
844 dbxout_finish_complex_stabs (tree sym
, STAB_CODE_TYPE code
,
845 rtx addr
, const char *label
, int number
)
847 int line ATTRIBUTE_UNUSED
;
851 line
= sym
? DECL_SOURCE_LINE (sym
) : 0;
852 if (DBX_CONTIN_LENGTH
> 0)
857 /* Nul-terminate the growing string, then get its size and
859 obstack_1grow (&stabstr_ob
, '\0');
861 len
= obstack_object_size (&stabstr_ob
);
862 chunk
= str
= obstack_finish (&stabstr_ob
);
864 /* Within the buffer are a sequence of NUL-separated strings,
865 each of which is to be written out as a separate stab
869 chunklen
= strlen (chunk
);
870 fwrite (chunk
, 1, chunklen
, asm_out_file
);
871 fputs ("\",", asm_out_file
);
873 /* Must add an extra byte to account for the NUL separator. */
874 chunk
+= chunklen
+ 1;
877 /* Only put a line number on the last stab in the sequence. */
878 DBX_FINISH_STABS (sym
, code
, len
== 0 ? line
: 0,
879 addr
, label
, number
);
883 fputs (ASM_STABS_OP
, asm_out_file
);
884 putc ('"', asm_out_file
);
886 stabstr_last_contin_point
= 0;
890 /* No continuations - we can put the whole string out at once.
891 It is faster to augment the string with the close quote and
892 comma than to do a two-character fputs. */
893 obstack_grow (&stabstr_ob
, "\",", 2);
894 len
= obstack_object_size (&stabstr_ob
);
895 str
= obstack_finish (&stabstr_ob
);
897 fwrite (str
, 1, len
, asm_out_file
);
898 DBX_FINISH_STABS (sym
, code
, line
, addr
, label
, number
);
900 obstack_free (&stabstr_ob
, str
);
903 #if defined (DBX_DEBUGGING_INFO)
906 dbxout_function_end (tree decl
)
908 char lscope_label_name
[100];
910 /* The Lscope label must be emitted even if we aren't doing anything
911 else; dbxout_block needs it. */
912 function_section (current_function_decl
);
914 /* Convert Lscope into the appropriate format for local labels in case
915 the system doesn't insert underscores in front of user generated
917 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name
, "Lscope", scope_labelno
);
918 targetm
.asm_out
.internal_label (asm_out_file
, "Lscope", scope_labelno
);
921 /* The N_FUN tag at the end of the function is a GNU extension,
922 which may be undesirable, and is unnecessary if we do not have
924 if (!use_gnu_debug_info_extensions
925 || NO_DBX_FUNCTION_END
926 || !targetm
.have_named_sections
927 || DECL_IGNORED_P (decl
))
930 /* By convention, GCC will mark the end of a function with an N_FUN
931 symbol and an empty string. */
932 #ifdef DBX_OUTPUT_NFUN
933 DBX_OUTPUT_NFUN (asm_out_file
, lscope_label_name
, current_function_decl
);
935 dbxout_begin_empty_stabs (N_FUN
);
936 dbxout_stab_value_label_diff (lscope_label_name
,
937 XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0));
941 if (!NO_DBX_BNSYM_ENSYM
&& !flag_debug_only_used_symbols
)
942 dbxout_stabd (N_ENSYM
, 0);
944 #endif /* DBX_DEBUGGING_INFO */
946 /* Get lang description for N_SO stab. */
947 static unsigned int ATTRIBUTE_UNUSED
948 get_lang_number (void)
950 const char *language_string
= lang_hooks
.name
;
952 if (strcmp (language_string
, "GNU C") == 0)
954 else if (strcmp (language_string
, "GNU C++") == 0)
956 else if (strcmp (language_string
, "GNU F77") == 0)
958 else if (strcmp (language_string
, "GNU F95") == 0)
959 return N_SO_FORTRAN90
; /* CHECKME */
960 else if (strcmp (language_string
, "GNU Pascal") == 0)
962 else if (strcmp (language_string
, "GNU Objective-C") == 0)
969 /* At the beginning of compilation, start writing the symbol table.
970 Initialize `typevec' and output the standard data types of C. */
973 dbxout_init (const char *input_file_name
)
975 char ltext_label_name
[100];
976 bool used_ltext_label_name
= false;
977 tree syms
= lang_hooks
.decls
.getdecls ();
980 typevec
= ggc_calloc (typevec_len
, sizeof typevec
[0]);
982 /* stabstr_ob contains one string, which will be just fine with
984 obstack_specify_allocation (&stabstr_ob
, 0, 1, xmalloc
, free
);
986 /* Convert Ltext into the appropriate format for local labels in case
987 the system doesn't insert underscores in front of user generated
989 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name
, "Ltext", 0);
991 /* Put the current working directory in an N_SO symbol. */
992 if (use_gnu_debug_info_extensions
&& !NO_DBX_MAIN_SOURCE_DIRECTORY
)
994 static const char *cwd
;
998 cwd
= get_src_pwd ();
1001 else if (!IS_DIR_SEPARATOR (cwd
[strlen (cwd
) - 1]))
1002 cwd
= concat (cwd
, "/", NULL
);
1004 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
1005 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asm_out_file
, cwd
);
1006 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
1007 dbxout_begin_simple_stabs_desc (cwd
, N_SO
, get_lang_number ());
1008 dbxout_stab_value_label (ltext_label_name
);
1009 used_ltext_label_name
= true;
1010 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
1013 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
1014 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asm_out_file
, input_file_name
);
1016 dbxout_begin_simple_stabs_desc (input_file_name
, N_SO
, get_lang_number ());
1017 dbxout_stab_value_label (ltext_label_name
);
1018 used_ltext_label_name
= true;
1021 if (used_ltext_label_name
)
1024 targetm
.asm_out
.internal_label (asm_out_file
, "Ltext", 0);
1027 /* Emit an N_OPT stab to indicate that this file was compiled by GCC.
1028 The string used is historical. */
1029 #ifndef NO_DBX_GCC_MARKER
1030 dbxout_begin_simple_stabs ("gcc2_compiled.", N_OPT
);
1031 dbxout_stab_value_zero ();
1034 base_input_file
= lastfile
= input_file_name
;
1036 next_type_number
= 1;
1038 #ifdef DBX_USE_BINCL
1039 current_file
= xmalloc (sizeof *current_file
);
1040 current_file
->next
= NULL
;
1041 current_file
->file_number
= 0;
1042 current_file
->next_type_number
= 1;
1043 next_file_number
= 1;
1044 current_file
->prev
= NULL
;
1045 current_file
->bincl_status
= BINCL_NOT_REQUIRED
;
1046 current_file
->pending_bincl_name
= NULL
;
1049 /* Get all permanent types that have typedef names, and output them
1050 all, except for those already output. Some language front ends
1051 put these declarations in the top-level scope; some do not;
1052 the latter are responsible for calling debug_hooks->type_decl from
1053 their record_builtin_type function. */
1054 dbxout_typedefs (syms
);
1056 if (preinit_symbols
)
1059 for (t
= nreverse (preinit_symbols
); t
; t
= TREE_CHAIN (t
))
1060 dbxout_symbol (TREE_VALUE (t
), 0);
1061 preinit_symbols
= 0;
1065 /* Output any typedef names for types described by TYPE_DECLs in SYMS. */
1068 dbxout_typedefs (tree syms
)
1070 for (; syms
!= NULL_TREE
; syms
= TREE_CHAIN (syms
))
1072 if (TREE_CODE (syms
) == TYPE_DECL
)
1074 tree type
= TREE_TYPE (syms
);
1075 if (TYPE_NAME (type
)
1076 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1077 && COMPLETE_OR_VOID_TYPE_P (type
)
1078 && ! TREE_ASM_WRITTEN (TYPE_NAME (type
)))
1079 dbxout_symbol (TYPE_NAME (type
), 0);
1084 #ifdef DBX_USE_BINCL
1085 /* Emit BINCL stab using given name. */
1087 emit_bincl_stab (const char *name
)
1089 dbxout_begin_simple_stabs (name
, N_BINCL
);
1090 dbxout_stab_value_zero ();
1093 /* If there are pending bincls then it is time to emit all of them. */
1096 emit_pending_bincls_if_required (void)
1099 emit_pending_bincls ();
1102 /* Emit all pending bincls. */
1105 emit_pending_bincls (void)
1107 struct dbx_file
*f
= current_file
;
1109 /* Find first pending bincl. */
1110 while (f
->bincl_status
== BINCL_PENDING
)
1113 /* Now emit all bincls. */
1118 if (f
->bincl_status
== BINCL_PENDING
)
1120 emit_bincl_stab (f
->pending_bincl_name
);
1122 /* Update file number and status. */
1123 f
->file_number
= next_file_number
++;
1124 f
->bincl_status
= BINCL_PROCESSED
;
1126 if (f
== current_file
)
1131 /* All pending bincls have been emitted. */
1138 emit_pending_bincls_if_required (void) {}
1141 /* Change to reading from a new source file. Generate a N_BINCL stab. */
1144 dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED
,
1145 const char *filename ATTRIBUTE_UNUSED
)
1147 #ifdef DBX_USE_BINCL
1148 struct dbx_file
*n
= xmalloc (sizeof *n
);
1150 n
->next
= current_file
;
1151 n
->next_type_number
= 1;
1152 /* Do not assign file number now.
1153 Delay it until we actually emit BINCL. */
1156 current_file
->prev
= n
;
1157 n
->bincl_status
= BINCL_PENDING
;
1158 n
->pending_bincl_name
= filename
;
1164 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
1167 dbxout_end_source_file (unsigned int line ATTRIBUTE_UNUSED
)
1169 #ifdef DBX_USE_BINCL
1170 /* Emit EINCL stab only if BINCL is not pending. */
1171 if (current_file
->bincl_status
== BINCL_PROCESSED
)
1173 dbxout_begin_stabn (N_EINCL
);
1174 dbxout_stab_value_zero ();
1176 current_file
->bincl_status
= BINCL_NOT_REQUIRED
;
1177 current_file
= current_file
->next
;
1181 /* Handle a few odd cases that occur when trying to make PCH files work. */
1184 dbxout_handle_pch (unsigned at_end
)
1188 /* When using the PCH, this file will be included, so we need to output
1190 dbxout_start_source_file (0, lastfile
);
1192 /* The base file when using the PCH won't be the same as
1193 the base file when it's being generated. */
1198 /* ... and an EINCL. */
1199 dbxout_end_source_file (0);
1201 /* Deal with cases where 'lastfile' was never actually changed. */
1202 lastfile_is_base
= lastfile
== NULL
;
1206 #if defined (DBX_DEBUGGING_INFO)
1207 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
1210 dbxout_source_file (const char *filename
)
1212 if (lastfile
== 0 && lastfile_is_base
)
1214 lastfile
= base_input_file
;
1215 lastfile_is_base
= 0;
1218 if (filename
&& (lastfile
== 0 || strcmp (filename
, lastfile
)))
1220 /* Don't change section amid function. */
1221 if (current_function_decl
== NULL_TREE
)
1224 dbxout_begin_simple_stabs (filename
, N_SOL
);
1225 dbxout_stab_value_internal_label ("Ltext", &source_label_number
);
1226 lastfile
= filename
;
1230 /* Output N_BNSYM and line number symbol entry. */
1233 dbxout_begin_prologue (unsigned int lineno
, const char *filename
)
1235 if (use_gnu_debug_info_extensions
1236 && !NO_DBX_FUNCTION_END
1237 && !NO_DBX_BNSYM_ENSYM
1238 && !flag_debug_only_used_symbols
)
1239 dbxout_stabd (N_BNSYM
, 0);
1241 dbxout_source_line (lineno
, filename
);
1244 /* Output a line number symbol entry for source file FILENAME and line
1248 dbxout_source_line (unsigned int lineno
, const char *filename
)
1250 dbxout_source_file (filename
);
1252 #ifdef DBX_OUTPUT_SOURCE_LINE
1253 DBX_OUTPUT_SOURCE_LINE (asm_out_file
, lineno
, dbxout_source_line_counter
);
1255 if (DBX_LINES_FUNCTION_RELATIVE
)
1257 rtx begin_label
= XEXP (DECL_RTL (current_function_decl
), 0);
1258 dbxout_begin_stabn_sline (lineno
);
1259 dbxout_stab_value_internal_label_diff ("LM", &dbxout_source_line_counter
,
1260 XSTR (begin_label
, 0));
1264 dbxout_stabd (N_SLINE
, lineno
);
1268 /* Describe the beginning of an internal block within a function. */
1271 dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED
, unsigned int n
)
1273 emit_pending_bincls_if_required ();
1274 targetm
.asm_out
.internal_label (asm_out_file
, "LBB", n
);
1277 /* Describe the end line-number of an internal block within a function. */
1280 dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED
, unsigned int n
)
1282 emit_pending_bincls_if_required ();
1283 targetm
.asm_out
.internal_label (asm_out_file
, "LBE", n
);
1286 /* Output dbx data for a function definition.
1287 This includes a definition of the function name itself (a symbol),
1288 definitions of the parameters (locating them in the parameter list)
1289 and then output the block that makes up the function's body
1290 (including all the auto variables of the function). */
1293 dbxout_function_decl (tree decl
)
1295 emit_pending_bincls_if_required ();
1296 #ifndef DBX_FUNCTION_FIRST
1297 dbxout_begin_function (decl
);
1299 dbxout_block (DECL_INITIAL (decl
), 0, DECL_ARGUMENTS (decl
));
1300 dbxout_function_end (decl
);
1303 #endif /* DBX_DEBUGGING_INFO */
1305 /* Debug information for a global DECL. Called from toplev.c after
1306 compilation proper has finished. */
1308 dbxout_global_decl (tree decl
)
1310 if (TREE_CODE (decl
) == VAR_DECL
1311 && ! DECL_EXTERNAL (decl
)
1312 && DECL_RTL_SET_P (decl
)) /* Not necessary? */
1314 int saved_tree_used
= TREE_USED (decl
);
1315 TREE_USED (decl
) = 1;
1316 dbxout_symbol (decl
, 0);
1317 TREE_USED (decl
) = saved_tree_used
;
1321 /* This is just a function-type adapter; dbxout_symbol does exactly
1322 what we want but returns an int. */
1324 dbxout_type_decl (tree decl
, int local
)
1326 dbxout_symbol (decl
, local
);
1329 /* At the end of compilation, finish writing the symbol table.
1330 The default is to call debug_free_queue but do nothing else. */
1333 dbxout_finish (const char *filename ATTRIBUTE_UNUSED
)
1335 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
1336 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asm_out_file
, filename
);
1337 #elif defined DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
1340 dbxout_begin_empty_stabs (N_SO
);
1341 dbxout_stab_value_internal_label ("Letext", 0);
1344 debug_free_queue ();
1347 /* Output the index of a type. */
1350 dbxout_type_index (tree type
)
1352 #ifndef DBX_USE_BINCL
1353 stabstr_D (TYPE_SYMTAB_ADDRESS (type
));
1355 struct typeinfo
*t
= &typevec
[TYPE_SYMTAB_ADDRESS (type
)];
1357 stabstr_D (t
->file_number
);
1359 stabstr_D (t
->type_number
);
1366 /* Used in several places: evaluates to '0' for a private decl,
1367 '1' for a protected decl, '2' for a public decl. */
1368 #define DECL_ACCESSIBILITY_CHAR(DECL) \
1369 (TREE_PRIVATE (DECL) ? '0' : TREE_PROTECTED (DECL) ? '1' : '2')
1371 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
1372 This must be a separate function because anonymous unions require
1376 dbxout_type_fields (tree type
)
1380 /* Output the name, type, position (in bits), size (in bits) of each
1381 field that we can support. */
1382 for (tem
= TYPE_FIELDS (type
); tem
; tem
= TREE_CHAIN (tem
))
1384 /* If one of the nodes is an error_mark or its type is then
1386 if (tem
== error_mark_node
|| TREE_TYPE (tem
) == error_mark_node
)
1389 /* Omit here local type decls until we know how to support them. */
1390 if (TREE_CODE (tem
) == TYPE_DECL
1391 /* Omit fields whose position or size are variable or too large to
1393 || (TREE_CODE (tem
) == FIELD_DECL
1394 && (! host_integerp (bit_position (tem
), 0)
1395 || ! DECL_SIZE (tem
)
1396 || ! host_integerp (DECL_SIZE (tem
), 1)))
1397 /* Omit here the nameless fields that are used to skip bits. */
1398 || DECL_IGNORED_P (tem
))
1401 else if (TREE_CODE (tem
) != CONST_DECL
)
1403 /* Continue the line if necessary,
1404 but not before the first field. */
1405 if (tem
!= TYPE_FIELDS (type
))
1408 if (DECL_NAME (tem
))
1409 stabstr_I (DECL_NAME (tem
));
1412 if (use_gnu_debug_info_extensions
1413 && (TREE_PRIVATE (tem
) || TREE_PROTECTED (tem
)
1414 || TREE_CODE (tem
) != FIELD_DECL
))
1416 have_used_extensions
= 1;
1418 stabstr_C (DECL_ACCESSIBILITY_CHAR (tem
));
1421 dbxout_type ((TREE_CODE (tem
) == FIELD_DECL
1422 && DECL_BIT_FIELD_TYPE (tem
))
1423 ? DECL_BIT_FIELD_TYPE (tem
) : TREE_TYPE (tem
), 0);
1425 if (TREE_CODE (tem
) == VAR_DECL
)
1427 if (TREE_STATIC (tem
) && use_gnu_debug_info_extensions
)
1429 tree name
= DECL_ASSEMBLER_NAME (tem
);
1431 have_used_extensions
= 1;
1437 /* If TEM is non-static, GDB won't understand it. */
1438 stabstr_S (",0,0;");
1443 stabstr_D (int_bit_position (tem
));
1445 stabstr_D (tree_low_cst (DECL_SIZE (tem
), 1));
1452 /* Subroutine of `dbxout_type_methods'. Output debug info about the
1453 method described DECL. */
1456 dbxout_type_method_1 (tree decl
)
1460 if (TREE_CODE (TREE_TYPE (decl
)) == FUNCTION_TYPE
)
1462 else /* it's a METHOD_TYPE. */
1464 tree firstarg
= TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)));
1465 /* A for normal functions.
1466 B for `const' member functions.
1467 C for `volatile' member functions.
1468 D for `const volatile' member functions. */
1469 if (TYPE_READONLY (TREE_TYPE (firstarg
)))
1471 if (TYPE_VOLATILE (TREE_TYPE (firstarg
)))
1474 if (DECL_VINDEX (decl
))
1480 /* ??? Output the mangled name, which contains an encoding of the
1481 method's type signature. May not be necessary anymore. */
1483 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
1485 stabstr_C (DECL_ACCESSIBILITY_CHAR (decl
));
1489 if (DECL_VINDEX (decl
) && host_integerp (DECL_VINDEX (decl
), 0))
1491 stabstr_D (tree_low_cst (DECL_VINDEX (decl
), 0));
1493 dbxout_type (DECL_CONTEXT (decl
), 0);
1498 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
1502 dbxout_type_methods (tree type
)
1504 /* C++: put out the method names and their parameter lists */
1505 tree methods
= TYPE_METHODS (type
);
1509 if (methods
== NULL_TREE
)
1512 if (TREE_CODE (methods
) != TREE_VEC
)
1514 else if (TREE_VEC_ELT (methods
, 0) != NULL_TREE
)
1515 fndecl
= TREE_VEC_ELT (methods
, 0);
1517 fndecl
= TREE_VEC_ELT (methods
, 1);
1521 int need_prefix
= 1;
1523 /* Group together all the methods for the same operation.
1524 These differ in the types of the arguments. */
1525 for (last
= NULL_TREE
;
1526 fndecl
&& (last
== NULL_TREE
|| DECL_NAME (fndecl
) == DECL_NAME (last
));
1527 fndecl
= TREE_CHAIN (fndecl
))
1528 /* Output the name of the field (after overloading), as
1529 well as the name of the field before overloading, along
1530 with its parameter list */
1532 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these
1533 include TEMPLATE_DECLs.) The debugger doesn't know what
1534 to do with such entities anyhow. */
1535 if (TREE_CODE (fndecl
) != FUNCTION_DECL
)
1542 /* Also ignore abstract methods; those are only interesting to
1543 the DWARF backends. */
1544 if (DECL_IGNORED_P (fndecl
) || DECL_ABSTRACT (fndecl
))
1547 /* Redundantly output the plain name, since that's what gdb
1551 stabstr_I (DECL_NAME (fndecl
));
1556 dbxout_type (TREE_TYPE (fndecl
), 0);
1557 dbxout_type_method_1 (fndecl
);
1564 /* Emit a "range" type specification, which has the form:
1565 "r<index type>;<lower bound>;<upper bound>;".
1566 TYPE is an INTEGER_TYPE. */
1569 dbxout_range_type (tree type
)
1572 if (TREE_TYPE (type
))
1573 dbxout_type (TREE_TYPE (type
), 0);
1574 else if (TREE_CODE (type
) != INTEGER_TYPE
)
1575 dbxout_type (type
, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
1578 /* Traditionally, we made sure 'int' was type 1, and builtin types
1579 were defined to be sub-ranges of int. Unfortunately, this
1580 does not allow us to distinguish true sub-ranges from integer
1581 types. So, instead we define integer (non-sub-range) types as
1582 sub-ranges of themselves. This matters for Chill. If this isn't
1583 a subrange type, then we want to define it in terms of itself.
1584 However, in C, this may be an anonymous integer type, and we don't
1585 want to emit debug info referring to it. Just calling
1586 dbxout_type_index won't work anyways, because the type hasn't been
1587 defined yet. We make this work for both cases by checked to see
1588 whether this is a defined type, referring to it if it is, and using
1590 if (TYPE_SYMTAB_ADDRESS (type
) != 0)
1591 dbxout_type_index (type
);
1593 dbxout_type_index (integer_type_node
);
1597 if (TYPE_MIN_VALUE (type
) != 0
1598 && host_integerp (TYPE_MIN_VALUE (type
), 0))
1600 if (print_int_cst_bounds_in_octal_p (type
))
1601 stabstr_O (TYPE_MIN_VALUE (type
));
1603 stabstr_D (tree_low_cst (TYPE_MIN_VALUE (type
), 0));
1609 if (TYPE_MAX_VALUE (type
) != 0
1610 && host_integerp (TYPE_MAX_VALUE (type
), 0))
1612 if (print_int_cst_bounds_in_octal_p (type
))
1613 stabstr_O (TYPE_MAX_VALUE (type
));
1615 stabstr_D (tree_low_cst (TYPE_MAX_VALUE (type
), 0));
1623 /* Output a reference to a type. If the type has not yet been
1624 described in the dbx output, output its definition now.
1625 For a type already defined, just refer to its definition
1626 using the type number.
1628 If FULL is nonzero, and the type has been described only with
1629 a forward-reference, output the definition now.
1630 If FULL is zero in this case, just refer to the forward-reference
1631 using the number previously allocated. */
1634 dbxout_type (tree type
, int full
)
1638 static int anonymous_type_number
= 0;
1640 if (TREE_CODE (type
) == VECTOR_TYPE
)
1641 /* The frontend feeds us a representation for the vector as a struct
1642 containing an array. Pull out the array type. */
1643 type
= TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type
)));
1645 /* If there was an input error and we don't really have a type,
1646 avoid crashing and write something that is at least valid
1647 by assuming `int'. */
1648 if (type
== error_mark_node
)
1649 type
= integer_type_node
;
1652 if (TYPE_NAME (type
)
1653 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1654 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type
)))
1658 /* Try to find the "main variant" with the same name. */
1659 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1660 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
1661 main_variant
= TREE_TYPE (TYPE_NAME (type
));
1663 main_variant
= TYPE_MAIN_VARIANT (type
);
1665 /* If we are not using extensions, stabs does not distinguish const and
1666 volatile, so there is no need to make them separate types. */
1667 if (!use_gnu_debug_info_extensions
)
1668 type
= main_variant
;
1670 if (TYPE_SYMTAB_ADDRESS (type
) == 0)
1672 /* Type has no dbx number assigned. Assign next available number. */
1673 TYPE_SYMTAB_ADDRESS (type
) = next_type_number
++;
1675 /* Make sure type vector is long enough to record about this type. */
1677 if (next_type_number
== typevec_len
)
1680 = ggc_realloc (typevec
, (typevec_len
* 2 * sizeof typevec
[0]));
1681 memset (typevec
+ typevec_len
, 0, typevec_len
* sizeof typevec
[0]);
1685 #ifdef DBX_USE_BINCL
1686 emit_pending_bincls_if_required ();
1687 typevec
[TYPE_SYMTAB_ADDRESS (type
)].file_number
1688 = current_file
->file_number
;
1689 typevec
[TYPE_SYMTAB_ADDRESS (type
)].type_number
1690 = current_file
->next_type_number
++;
1694 if (flag_debug_only_used_symbols
)
1696 if ((TREE_CODE (type
) == RECORD_TYPE
1697 || TREE_CODE (type
) == UNION_TYPE
1698 || TREE_CODE (type
) == QUAL_UNION_TYPE
1699 || TREE_CODE (type
) == ENUMERAL_TYPE
)
1700 && TYPE_STUB_DECL (type
)
1701 && DECL_P (TYPE_STUB_DECL (type
))
1702 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type
)))
1703 debug_queue_symbol (TYPE_STUB_DECL (type
));
1704 else if (TYPE_NAME (type
)
1705 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
)
1706 debug_queue_symbol (TYPE_NAME (type
));
1709 /* Output the number of this type, to refer to it. */
1710 dbxout_type_index (type
);
1712 #ifdef DBX_TYPE_DEFINED
1713 if (DBX_TYPE_DEFINED (type
))
1717 /* If this type's definition has been output or is now being output,
1720 switch (typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
)
1725 /* If we have already had a cross reference,
1726 and either that's all we want or that's the best we could do,
1727 don't repeat the cross reference.
1728 Sun dbx crashes if we do. */
1729 if (! full
|| !COMPLETE_TYPE_P (type
)
1730 /* No way in DBX fmt to describe a variable size. */
1731 || ! host_integerp (TYPE_SIZE (type
), 1))
1739 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1740 leave the type-number completely undefined rather than output
1741 a cross-reference. If we have already used GNU debug info extensions,
1742 then it is OK to output a cross reference. This is necessary to get
1743 proper C++ debug output. */
1744 if ((TREE_CODE (type
) == RECORD_TYPE
|| TREE_CODE (type
) == UNION_TYPE
1745 || TREE_CODE (type
) == QUAL_UNION_TYPE
1746 || TREE_CODE (type
) == ENUMERAL_TYPE
)
1747 && ! use_gnu_debug_info_extensions
)
1748 /* We must use the same test here as we use twice below when deciding
1749 whether to emit a cross-reference. */
1750 if ((TYPE_NAME (type
) != 0
1751 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1752 && DECL_IGNORED_P (TYPE_NAME (type
)))
1754 || !COMPLETE_TYPE_P (type
)
1755 /* No way in DBX fmt to describe a variable size. */
1756 || ! host_integerp (TYPE_SIZE (type
), 1))
1758 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
1763 /* Output a definition now. */
1766 /* Mark it as defined, so that if it is self-referent
1767 we will not get into an infinite recursion of definitions. */
1769 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_DEFINED
;
1771 /* If this type is a variant of some other, hand off. Types with
1772 different names are usefully distinguished. We only distinguish
1773 cv-qualified types if we're using extensions. */
1774 if (TYPE_READONLY (type
) > TYPE_READONLY (main_variant
))
1777 dbxout_type (build_type_variant (type
, 0, TYPE_VOLATILE (type
)), 0);
1780 else if (TYPE_VOLATILE (type
) > TYPE_VOLATILE (main_variant
))
1783 dbxout_type (build_type_variant (type
, TYPE_READONLY (type
), 0), 0);
1786 else if (main_variant
!= TYPE_MAIN_VARIANT (type
))
1788 if (flag_debug_only_used_symbols
)
1790 tree orig_type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
1792 if ((TREE_CODE (orig_type
) == RECORD_TYPE
1793 || TREE_CODE (orig_type
) == UNION_TYPE
1794 || TREE_CODE (orig_type
) == QUAL_UNION_TYPE
1795 || TREE_CODE (orig_type
) == ENUMERAL_TYPE
)
1796 && TYPE_STUB_DECL (orig_type
)
1797 && ! DECL_IGNORED_P (TYPE_STUB_DECL (orig_type
)))
1798 debug_queue_symbol (TYPE_STUB_DECL (orig_type
));
1800 /* 'type' is a typedef; output the type it refers to. */
1801 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)), 0);
1804 /* else continue. */
1806 switch (TREE_CODE (type
))
1810 /* For a void type, just define it as itself; i.e., "5=5".
1811 This makes us consider it defined
1812 without saying what it is. The debugger will make it
1813 a void type when the reference is seen, and nothing will
1814 ever override that default. */
1815 dbxout_type_index (type
);
1819 if (type
== char_type_node
&& ! TYPE_UNSIGNED (type
))
1821 /* Output the type `char' as a subrange of itself!
1822 I don't understand this definition, just copied it
1823 from the output of pcc.
1824 This used to use `r2' explicitly and we used to
1825 take care to make sure that `char' was type number 2. */
1827 dbxout_type_index (type
);
1828 stabstr_S (";0;127;");
1831 /* If this is a subtype of another integer type, always prefer to
1832 write it as a subtype. */
1833 else if (TREE_TYPE (type
) != 0
1834 && TREE_CODE (TREE_TYPE (type
)) == INTEGER_TYPE
)
1836 /* If the size is non-standard, say what it is if we can use
1839 if (use_gnu_debug_info_extensions
1840 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1842 have_used_extensions
= 1;
1844 stabstr_D (TYPE_PRECISION (type
));
1848 dbxout_range_type (type
);
1853 /* If the size is non-standard, say what it is if we can use
1856 if (use_gnu_debug_info_extensions
1857 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1859 have_used_extensions
= 1;
1861 stabstr_D (TYPE_PRECISION (type
));
1865 if (print_int_cst_bounds_in_octal_p (type
))
1869 /* If this type derives from another type, output type index of
1870 parent type. This is particularly important when parent type
1871 is an enumerated type, because not generating the parent type
1872 index would transform the definition of this enumerated type
1873 into a plain unsigned type. */
1874 if (TREE_TYPE (type
) != 0)
1875 dbxout_type_index (TREE_TYPE (type
));
1877 dbxout_type_index (type
);
1880 stabstr_O (TYPE_MIN_VALUE (type
));
1882 stabstr_O (TYPE_MAX_VALUE (type
));
1887 /* Output other integer types as subranges of `int'. */
1888 dbxout_range_type (type
);
1894 /* This used to say `r1' and we used to take care
1895 to make sure that `int' was type number 1. */
1897 dbxout_type_index (integer_type_node
);
1899 stabstr_D (int_size_in_bytes (type
));
1904 if (use_gnu_debug_info_extensions
)
1906 have_used_extensions
= 1;
1908 stabstr_D (BITS_PER_UNIT
* int_size_in_bytes (type
));
1909 stabstr_S (";-20;");
1913 /* Output the type `char' as a subrange of itself.
1914 That is what pcc seems to do. */
1916 dbxout_type_index (char_type_node
);
1917 stabstr_S (TYPE_UNSIGNED (type
) ? ";0;255;" : ";0;127;");
1922 if (use_gnu_debug_info_extensions
)
1924 have_used_extensions
= 1;
1926 stabstr_D (BITS_PER_UNIT
* int_size_in_bytes (type
));
1927 stabstr_S (";-16;");
1929 else /* Define as enumeral type (False, True) */
1930 stabstr_S ("eFalse:0,True:1,;");
1935 dbxout_type (TREE_TYPE (type
), 0);
1939 /* Differs from the REAL_TYPE by its new data type number.
1940 R3 is NF_COMPLEX. We don't try to use any of the other NF_*
1941 codes since gdb doesn't care anyway. */
1943 if (TREE_CODE (TREE_TYPE (type
)) == REAL_TYPE
)
1946 stabstr_D (2 * int_size_in_bytes (TREE_TYPE (type
)));
1951 /* Output a complex integer type as a structure,
1952 pending some other way to do it. */
1954 stabstr_D (int_size_in_bytes (type
));
1956 stabstr_S ("real:");
1957 dbxout_type (TREE_TYPE (type
), 0);
1959 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
1961 stabstr_S (";imag:");
1962 dbxout_type (TREE_TYPE (type
), 0);
1964 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
1966 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
1972 /* Make arrays of packed bits look like bitstrings for chill. */
1973 if (TYPE_PACKED (type
) && use_gnu_debug_info_extensions
)
1975 have_used_extensions
= 1;
1977 stabstr_D (BITS_PER_UNIT
* int_size_in_bytes (type
));
1978 stabstr_S (";@S;S");
1979 dbxout_type (TYPE_DOMAIN (type
), 0);
1983 /* Output "a" followed by a range type definition
1984 for the index type of the array
1985 followed by a reference to the target-type.
1986 ar1;0;N;M for a C array of type M and size N+1. */
1987 /* Check if a character string type, which in Chill is
1988 different from an array of characters. */
1989 if (TYPE_STRING_FLAG (type
) && use_gnu_debug_info_extensions
)
1991 have_used_extensions
= 1;
1994 tem
= TYPE_DOMAIN (type
);
1998 dbxout_type_index (integer_type_node
);
1999 stabstr_S (";0;-1;");
2004 dbxout_range_type (tem
);
2007 dbxout_type (TREE_TYPE (type
), 0);
2012 case QUAL_UNION_TYPE
:
2014 tree binfo
= TYPE_BINFO (type
);
2016 /* Output a structure type. We must use the same test here as we
2017 use in the DBX_NO_XREFS case above. */
2018 if ((TYPE_NAME (type
) != 0
2019 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
2020 && DECL_IGNORED_P (TYPE_NAME (type
)))
2022 || !COMPLETE_TYPE_P (type
)
2023 /* No way in DBX fmt to describe a variable size. */
2024 || ! host_integerp (TYPE_SIZE (type
), 1))
2026 /* If the type is just a cross reference, output one
2027 and mark the type as partially described.
2028 If it later becomes defined, we will output
2029 its real definition.
2030 If the type has a name, don't nest its definition within
2031 another type's definition; instead, output an xref
2032 and let the definition come when the name is defined. */
2033 stabstr_S ((TREE_CODE (type
) == RECORD_TYPE
) ? "xs" : "xu");
2034 if (TYPE_NAME (type
) != 0)
2035 dbxout_type_name (type
);
2039 stabstr_D (anonymous_type_number
++);
2043 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
2047 /* Identify record or union, and print its size. */
2048 stabstr_C ((TREE_CODE (type
) == RECORD_TYPE
) ? 's' : 'u');
2049 stabstr_D (int_size_in_bytes (type
));
2055 VEC (tree
) *accesses
= BINFO_BASE_ACCESSES (binfo
);
2057 if (use_gnu_debug_info_extensions
)
2059 if (BINFO_N_BASE_BINFOS (binfo
))
2061 have_used_extensions
= 1;
2063 stabstr_U (BINFO_N_BASE_BINFOS (binfo
));
2067 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, child
); i
++)
2069 tree access
= (accesses
? VEC_index (tree
, accesses
, i
)
2070 : access_public_node
);
2072 if (use_gnu_debug_info_extensions
)
2074 have_used_extensions
= 1;
2075 stabstr_C (BINFO_VIRTUAL_P (child
) ? '1' : '0');
2076 stabstr_C (access
== access_public_node
? '2' :
2077 access
== access_protected_node
2079 if (BINFO_VIRTUAL_P (child
)
2080 && strcmp (lang_hooks
.name
, "GNU C++") == 0)
2081 /* For a virtual base, print the (negative)
2082 offset within the vtable where we must look
2083 to find the necessary adjustment. */
2085 (tree_low_cst (BINFO_VPTR_FIELD (child
), 0)
2088 stabstr_D (tree_low_cst (BINFO_OFFSET (child
), 0)
2091 dbxout_type (BINFO_TYPE (child
), 0);
2096 /* Print out the base class information with
2097 fields which have the same names at the types
2099 dbxout_type_name (BINFO_TYPE (child
));
2101 dbxout_type (BINFO_TYPE (child
), full
);
2103 stabstr_D (tree_low_cst (BINFO_OFFSET (child
), 0)
2107 (tree_low_cst (TYPE_SIZE (BINFO_TYPE (child
)), 0)
2115 /* Write out the field declarations. */
2116 dbxout_type_fields (type
);
2117 if (use_gnu_debug_info_extensions
&& TYPE_METHODS (type
) != NULL_TREE
)
2119 have_used_extensions
= 1;
2120 dbxout_type_methods (type
);
2125 if (use_gnu_debug_info_extensions
&& TREE_CODE (type
) == RECORD_TYPE
2126 /* Avoid the ~ if we don't really need it--it confuses dbx. */
2127 && TYPE_VFIELD (type
))
2129 have_used_extensions
= 1;
2131 /* We need to write out info about what field this class
2132 uses as its "main" vtable pointer field, because if this
2133 field is inherited from a base class, GDB cannot necessarily
2134 figure out which field it's using in time. */
2136 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type
)), 0);
2142 /* We must use the same test here as we use in the DBX_NO_XREFS case
2143 above. We simplify it a bit since an enum will never have a variable
2145 if ((TYPE_NAME (type
) != 0
2146 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
2147 && DECL_IGNORED_P (TYPE_NAME (type
)))
2149 || !COMPLETE_TYPE_P (type
))
2152 dbxout_type_name (type
);
2153 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
2157 if (use_gnu_debug_info_extensions
2158 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
2160 have_used_extensions
= 1;
2162 stabstr_D (TYPE_PRECISION (type
));
2167 for (tem
= TYPE_VALUES (type
); tem
; tem
= TREE_CHAIN (tem
))
2169 stabstr_I (TREE_PURPOSE (tem
));
2172 if (TREE_INT_CST_HIGH (TREE_VALUE (tem
)) == 0)
2173 stabstr_D (TREE_INT_CST_LOW (TREE_VALUE (tem
)));
2174 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem
)) == -1
2175 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (TREE_VALUE (tem
)) < 0)
2176 stabstr_D (TREE_INT_CST_LOW (TREE_VALUE (tem
)));
2178 stabstr_O (TREE_VALUE (tem
));
2181 if (TREE_CHAIN (tem
) != 0)
2190 dbxout_type (TREE_TYPE (type
), 0);
2194 if (use_gnu_debug_info_extensions
)
2196 have_used_extensions
= 1;
2199 /* Write the argument types out longhand. */
2200 dbxout_type (TYPE_METHOD_BASETYPE (type
), 0);
2202 dbxout_type (TREE_TYPE (type
), 0);
2203 dbxout_args (TYPE_ARG_TYPES (type
));
2207 /* Treat it as a function type. */
2208 dbxout_type (TREE_TYPE (type
), 0);
2212 if (use_gnu_debug_info_extensions
)
2214 have_used_extensions
= 1;
2216 dbxout_type (TYPE_OFFSET_BASETYPE (type
), 0);
2218 dbxout_type (TREE_TYPE (type
), 0);
2221 /* Should print as an int, because it is really just an offset. */
2222 dbxout_type (integer_type_node
, 0);
2225 case REFERENCE_TYPE
:
2226 if (use_gnu_debug_info_extensions
)
2228 have_used_extensions
= 1;
2233 dbxout_type (TREE_TYPE (type
), 0);
2238 dbxout_type (TREE_TYPE (type
), 0);
2246 /* Return nonzero if the given type represents an integer whose bounds
2247 should be printed in octal format. */
2250 print_int_cst_bounds_in_octal_p (tree type
)
2252 /* If we can use GDB extensions and the size is wider than a long
2253 (the size used by GDB to read them) or we may have trouble writing
2254 the bounds the usual way, write them in octal. Note the test is for
2255 the *target's* size of "long", not that of the host. The host test
2256 is just to make sure we can write it out in case the host wide int
2257 is narrower than the target "long".
2259 For unsigned types, we use octal if they are the same size or larger.
2260 This is because we print the bounds as signed decimal, and hence they
2261 can't span same size unsigned types. */
2263 if (use_gnu_debug_info_extensions
2264 && TYPE_MIN_VALUE (type
) != 0
2265 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
2266 && TYPE_MAX_VALUE (type
) != 0
2267 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
2268 && (TYPE_PRECISION (type
) > TYPE_PRECISION (integer_type_node
)
2269 || ((TYPE_PRECISION (type
) == TYPE_PRECISION (integer_type_node
))
2270 && TYPE_UNSIGNED (type
))
2271 || TYPE_PRECISION (type
) > HOST_BITS_PER_WIDE_INT
2272 || (TYPE_PRECISION (type
) == HOST_BITS_PER_WIDE_INT
2273 && TYPE_UNSIGNED (type
))))
2279 /* Output the name of type TYPE, with no punctuation.
2280 Such names can be set up either by typedef declarations
2281 or by struct, enum and union tags. */
2284 dbxout_type_name (tree type
)
2286 tree t
= TYPE_NAME (type
);
2289 switch (TREE_CODE (t
))
2291 case IDENTIFIER_NODE
:
2303 /* Output leading leading struct or class names needed for qualifying
2304 type whose scope is limited to a struct or class. */
2307 dbxout_class_name_qualifiers (tree decl
)
2309 tree context
= decl_type_context (decl
);
2311 if (context
!= NULL_TREE
2312 && TREE_CODE(context
) == RECORD_TYPE
2313 && TYPE_NAME (context
) != 0
2314 && (TREE_CODE (TYPE_NAME (context
)) == IDENTIFIER_NODE
2315 || (DECL_NAME (TYPE_NAME (context
)) != 0)))
2317 tree name
= TYPE_NAME (context
);
2319 if (TREE_CODE (name
) == TYPE_DECL
)
2321 dbxout_class_name_qualifiers (name
);
2322 name
= DECL_NAME (name
);
2329 /* Output a .stabs for the symbol defined by DECL,
2330 which must be a ..._DECL node in the normal namespace.
2331 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
2332 LOCAL is nonzero if the scope is less than the entire file.
2333 Return 1 if a stabs might have been emitted. */
2336 dbxout_symbol (tree decl
, int local ATTRIBUTE_UNUSED
)
2338 tree type
= TREE_TYPE (decl
);
2339 tree context
= NULL_TREE
;
2342 /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */
2345 /* Ignore nameless syms, but don't ignore type tags. */
2347 if ((DECL_NAME (decl
) == 0 && TREE_CODE (decl
) != TYPE_DECL
)
2348 || DECL_IGNORED_P (decl
))
2349 DBXOUT_DECR_NESTING_AND_RETURN (0);
2351 /* If we are to generate only the symbols actually used then such
2352 symbol nodees are flagged with TREE_USED. Ignore any that
2353 aren't flaged as TREE_USED. */
2355 if (flag_debug_only_used_symbols
2356 && (!TREE_USED (decl
)
2357 && (TREE_CODE (decl
) != VAR_DECL
|| !DECL_INITIAL (decl
))))
2358 DBXOUT_DECR_NESTING_AND_RETURN (0);
2360 /* If dbxout_init has not yet run, queue this symbol for later. */
2363 preinit_symbols
= tree_cons (0, decl
, preinit_symbols
);
2364 DBXOUT_DECR_NESTING_AND_RETURN (0);
2367 if (flag_debug_only_used_symbols
)
2371 /* We now have a used symbol. We need to generate the info for
2372 the symbol's type in addition to the symbol itself. These
2373 type symbols are queued to be generated after were done with
2374 the symbol itself (otherwise they would fight over the
2377 Note, because the TREE_TYPE(type) might be something like a
2378 pointer to a named type we need to look for the first name
2379 we see following the TREE_TYPE chain. */
2382 while (POINTER_TYPE_P (t
))
2385 /* RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, and ENUMERAL_TYPE
2386 need special treatment. The TYPE_STUB_DECL field in these
2387 types generally represents the tag name type we want to
2388 output. In addition there could be a typedef type with
2389 a different name. In that case we also want to output
2392 if (TREE_CODE (t
) == RECORD_TYPE
2393 || TREE_CODE (t
) == UNION_TYPE
2394 || TREE_CODE (t
) == QUAL_UNION_TYPE
2395 || TREE_CODE (t
) == ENUMERAL_TYPE
)
2397 if (TYPE_STUB_DECL (t
)
2398 && TYPE_STUB_DECL (t
) != decl
2399 && DECL_P (TYPE_STUB_DECL (t
))
2400 && ! DECL_IGNORED_P (TYPE_STUB_DECL (t
)))
2402 debug_queue_symbol (TYPE_STUB_DECL (t
));
2404 && TYPE_NAME (t
) != TYPE_STUB_DECL (t
)
2405 && TYPE_NAME (t
) != decl
2406 && DECL_P (TYPE_NAME (t
)))
2407 debug_queue_symbol (TYPE_NAME (t
));
2410 else if (TYPE_NAME (t
)
2411 && TYPE_NAME (t
) != decl
2412 && DECL_P (TYPE_NAME (t
)))
2413 debug_queue_symbol (TYPE_NAME (t
));
2416 emit_pending_bincls_if_required ();
2418 switch (TREE_CODE (decl
))
2421 /* Enum values are defined by defining the enum type. */
2425 if (DECL_RTL (decl
) == 0)
2426 DBXOUT_DECR_NESTING_AND_RETURN (0);
2427 if (DECL_EXTERNAL (decl
))
2429 /* Don't mention a nested function under its parent. */
2430 context
= decl_function_context (decl
);
2431 if (context
== current_function_decl
)
2433 /* Don't mention an inline instance of a nested function. */
2434 if (context
&& DECL_FROM_INLINE (decl
))
2436 if (!MEM_P (DECL_RTL (decl
))
2437 || GET_CODE (XEXP (DECL_RTL (decl
), 0)) != SYMBOL_REF
)
2440 dbxout_begin_complex_stabs ();
2441 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
2442 stabstr_S (TREE_PUBLIC (decl
) ? ":F" : ":f");
2445 if (TREE_TYPE (type
))
2446 dbxout_type (TREE_TYPE (type
), 0);
2448 dbxout_type (void_type_node
, 0);
2450 /* For a nested function, when that function is compiled,
2451 mention the containing function name
2452 as well as (since dbx wants it) our own assembler-name. */
2456 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
2458 stabstr_I (DECL_NAME (context
));
2461 dbxout_finish_complex_stabs (decl
, N_FUN
, XEXP (DECL_RTL (decl
), 0),
2466 /* Don't output the same typedef twice.
2467 And don't output what language-specific stuff doesn't want output. */
2468 if (TREE_ASM_WRITTEN (decl
) || TYPE_DECL_SUPPRESS_DEBUG (decl
))
2469 DBXOUT_DECR_NESTING_AND_RETURN (0);
2471 /* Don't output typedefs for types with magic type numbers (XCOFF). */
2472 #ifdef DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER
2474 int fundamental_type_number
=
2475 DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER (decl
);
2477 if (fundamental_type_number
!= 0)
2479 TREE_ASM_WRITTEN (decl
) = 1;
2480 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl
)) = fundamental_type_number
;
2481 DBXOUT_DECR_NESTING_AND_RETURN (0);
2491 if (DECL_NAME (decl
))
2493 /* Nonzero means we must output a tag as well as a typedef. */
2496 /* Handle the case of a C++ structure or union
2497 where the TYPE_NAME is a TYPE_DECL
2498 which gives both a typedef name and a tag. */
2499 /* dbx requires the tag first and the typedef second. */
2500 if ((TREE_CODE (type
) == RECORD_TYPE
2501 || TREE_CODE (type
) == UNION_TYPE
2502 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
2503 && TYPE_NAME (type
) == decl
2504 && !(use_gnu_debug_info_extensions
&& have_used_extensions
)
2505 && !TREE_ASM_WRITTEN (TYPE_NAME (type
))
2506 /* Distinguish the implicit typedefs of C++
2507 from explicit ones that might be found in C. */
2508 && DECL_ARTIFICIAL (decl
)
2509 /* Do not generate a tag for incomplete records. */
2510 && COMPLETE_TYPE_P (type
)
2511 /* Do not generate a tag for records of variable size,
2512 since this type can not be properly described in the
2513 DBX format, and it confuses some tools such as objdump. */
2514 && host_integerp (TYPE_SIZE (type
), 1))
2516 tree name
= TYPE_NAME (type
);
2517 if (TREE_CODE (name
) == TYPE_DECL
)
2518 name
= DECL_NAME (name
);
2520 dbxout_begin_complex_stabs ();
2523 dbxout_type (type
, 1);
2524 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
,
2528 dbxout_begin_complex_stabs ();
2530 /* Output leading class/struct qualifiers.
2531 ??? why not set have_used_extensions here ... because
2532 then the test of it below would always be true, I
2533 guess. But it's not clear to me why we shouldn't do
2534 that always in extended mode. */
2535 if (use_gnu_debug_info_extensions
)
2536 dbxout_class_name_qualifiers (decl
);
2538 /* Output typedef name. */
2539 stabstr_I (DECL_NAME (decl
));
2542 /* Short cut way to output a tag also. */
2543 if ((TREE_CODE (type
) == RECORD_TYPE
2544 || TREE_CODE (type
) == UNION_TYPE
2545 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
2546 && TYPE_NAME (type
) == decl
2547 /* Distinguish the implicit typedefs of C++
2548 from explicit ones that might be found in C. */
2549 && DECL_ARTIFICIAL (decl
))
2551 if (use_gnu_debug_info_extensions
&& have_used_extensions
)
2554 TREE_ASM_WRITTEN (TYPE_NAME (type
)) = 1;
2559 dbxout_type (type
, 1);
2560 dbxout_finish_complex_stabs (decl
, DBX_TYPE_DECL_STABS_CODE
,
2565 /* Don't output a tag if this is an incomplete type. This prevents
2566 the sun4 Sun OS 4.x dbx from crashing. */
2568 if (tag_needed
&& TYPE_NAME (type
) != 0
2569 && (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
2570 || (DECL_NAME (TYPE_NAME (type
)) != 0))
2571 && COMPLETE_TYPE_P (type
)
2572 && !TREE_ASM_WRITTEN (TYPE_NAME (type
)))
2574 /* For a TYPE_DECL with no name, but the type has a name,
2576 This is what represents `struct foo' with no typedef. */
2577 /* In C++, the name of a type is the corresponding typedef.
2578 In C, it is an IDENTIFIER_NODE. */
2579 tree name
= TYPE_NAME (type
);
2580 if (TREE_CODE (name
) == TYPE_DECL
)
2581 name
= DECL_NAME (name
);
2583 dbxout_begin_complex_stabs ();
2586 dbxout_type (type
, 1);
2587 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
, 0, 0, 0);
2591 /* If an enum type has no name, it cannot be referred to, but
2592 we must output it anyway, to record the enumeration
2595 if (!did_output
&& TREE_CODE (type
) == ENUMERAL_TYPE
)
2597 dbxout_begin_complex_stabs ();
2598 /* Some debuggers fail when given NULL names, so give this a
2599 harmless name of " " (Why not "(anon)"?). */
2601 dbxout_type (type
, 1);
2602 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
, 0, 0, 0);
2605 /* Prevent duplicate output of a typedef. */
2606 TREE_ASM_WRITTEN (decl
) = 1;
2611 /* Parm decls go in their own separate chains
2612 and are output by dbxout_reg_parms and dbxout_parms. */
2616 /* Named return value, treat like a VAR_DECL. */
2618 if (! DECL_RTL_SET_P (decl
))
2619 DBXOUT_DECR_NESTING_AND_RETURN (0);
2620 /* Don't mention a variable that is external.
2621 Let the file that defines it describe it. */
2622 if (DECL_EXTERNAL (decl
))
2625 /* If the variable is really a constant
2626 and not written in memory, inform the debugger.
2628 ??? Why do we skip emitting the type and location in this case? */
2629 if (TREE_STATIC (decl
) && TREE_READONLY (decl
)
2630 && DECL_INITIAL (decl
) != 0
2631 && host_integerp (DECL_INITIAL (decl
), 0)
2632 && ! TREE_ASM_WRITTEN (decl
)
2633 && (DECL_CONTEXT (decl
) == NULL_TREE
2634 || TREE_CODE (DECL_CONTEXT (decl
)) == BLOCK
)
2635 && TREE_PUBLIC (decl
) == 0)
2637 /* The sun4 assembler does not grok this. */
2639 if (TREE_CODE (TREE_TYPE (decl
)) == INTEGER_TYPE
2640 || TREE_CODE (TREE_TYPE (decl
)) == ENUMERAL_TYPE
)
2642 HOST_WIDE_INT ival
= TREE_INT_CST_LOW (DECL_INITIAL (decl
));
2644 dbxout_begin_complex_stabs ();
2645 stabstr_I (DECL_NAME (decl
));
2648 dbxout_finish_complex_stabs (0, N_LSYM
, 0, 0, 0);
2649 DBXOUT_DECR_NESTING
;
2655 /* else it is something we handle like a normal variable. */
2657 SET_DECL_RTL (decl
, eliminate_regs (DECL_RTL (decl
), 0, NULL_RTX
));
2658 #ifdef LEAF_REG_REMAP
2659 if (current_function_uses_only_leaf_regs
)
2660 leaf_renumber_regs_insn (DECL_RTL (decl
));
2663 result
= dbxout_symbol_location (decl
, type
, 0, DECL_RTL (decl
));
2669 DBXOUT_DECR_NESTING
;
2673 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
2674 Add SUFFIX to its name, if SUFFIX is not 0.
2675 Describe the variable as residing in HOME
2676 (usually HOME is DECL_RTL (DECL), but not always).
2677 Returns 1 if the stab was really emitted. */
2680 dbxout_symbol_location (tree decl
, tree type
, const char *suffix
, rtx home
)
2683 STAB_CODE_TYPE code
;
2688 /* Don't mention a variable at all
2689 if it was completely optimized into nothingness.
2691 If the decl was from an inline function, then its rtl
2692 is not identically the rtl that was used in this
2693 particular compilation. */
2694 if (GET_CODE (home
) == SUBREG
)
2698 while (GET_CODE (value
) == SUBREG
)
2699 value
= SUBREG_REG (value
);
2702 if (REGNO (value
) >= FIRST_PSEUDO_REGISTER
)
2705 home
= alter_subreg (&home
);
2709 regno
= REGNO (home
);
2710 if (regno
>= FIRST_PSEUDO_REGISTER
)
2714 /* The kind-of-variable letter depends on where
2715 the variable is and on the scope of its name:
2716 G and N_GSYM for static storage and global scope,
2717 S for static storage and file scope,
2718 V for static storage and local scope,
2719 for those two, use N_LCSYM if data is in bss segment,
2720 N_STSYM if in data segment, N_FUN otherwise.
2721 (We used N_FUN originally, then changed to N_STSYM
2722 to please GDB. However, it seems that confused ld.
2723 Now GDB has been fixed to like N_FUN, says Kingdon.)
2724 no letter at all, and N_LSYM, for auto variable,
2725 r and N_RSYM for register variable. */
2727 if (MEM_P (home
) && GET_CODE (XEXP (home
, 0)) == SYMBOL_REF
)
2729 if (TREE_PUBLIC (decl
))
2736 addr
= XEXP (home
, 0);
2738 letter
= decl_function_context (decl
) ? 'V' : 'S';
2740 /* Some ports can transform a symbol ref into a label ref,
2741 because the symbol ref is too far away and has to be
2742 dumped into a constant pool. Alternatively, the symbol
2743 in the constant pool might be referenced by a different
2745 if (GET_CODE (addr
) == SYMBOL_REF
2746 && CONSTANT_POOL_ADDRESS_P (addr
))
2749 rtx tmp
= get_pool_constant_mark (addr
, &marked
);
2751 if (GET_CODE (tmp
) == SYMBOL_REF
)
2754 if (CONSTANT_POOL_ADDRESS_P (addr
))
2755 get_pool_constant_mark (addr
, &marked
);
2759 else if (GET_CODE (tmp
) == LABEL_REF
)
2765 /* If all references to the constant pool were optimized
2766 out, we just ignore the symbol. */
2771 /* This should be the same condition as in assemble_variable, but
2772 we don't have access to dont_output_data here. So, instead,
2773 we rely on the fact that error_mark_node initializers always
2774 end up in bss for C++ and never end up in bss for C. */
2775 if (DECL_INITIAL (decl
) == 0
2776 || (!strcmp (lang_hooks
.name
, "GNU C++")
2777 && DECL_INITIAL (decl
) == error_mark_node
))
2779 else if (DECL_IN_TEXT_SECTION (decl
))
2780 /* This is not quite right, but it's the closest
2781 of all the codes that Unix defines. */
2782 code
= DBX_STATIC_CONST_VAR_CODE
;
2785 /* Ultrix `as' seems to need this. */
2786 #ifdef DBX_STATIC_STAB_DATA_SECTION
2793 else if (regno
>= 0)
2797 number
= DBX_REGISTER_NUMBER (regno
);
2799 else if (MEM_P (home
)
2800 && (MEM_P (XEXP (home
, 0))
2801 || (REG_P (XEXP (home
, 0))
2802 && REGNO (XEXP (home
, 0)) != HARD_FRAME_POINTER_REGNUM
2803 && REGNO (XEXP (home
, 0)) != STACK_POINTER_REGNUM
2804 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2805 && REGNO (XEXP (home
, 0)) != ARG_POINTER_REGNUM
2808 /* If the value is indirect by memory or by a register
2809 that isn't the frame pointer
2810 then it means the object is variable-sized and address through
2811 that register or stack slot. DBX has no way to represent this
2812 so all we can do is output the variable as a pointer.
2813 If it's not a parameter, ignore it. */
2815 if (REG_P (XEXP (home
, 0)))
2819 if (REGNO (XEXP (home
, 0)) >= FIRST_PSEUDO_REGISTER
)
2821 number
= DBX_REGISTER_NUMBER (REGNO (XEXP (home
, 0)));
2826 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2827 We want the value of that CONST_INT. */
2828 number
= DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home
, 0), 0));
2831 /* Effectively do build_pointer_type, but don't cache this type,
2832 since it might be temporary whereas the type it points to
2833 might have been saved for inlining. */
2834 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2835 type
= make_node (POINTER_TYPE
);
2836 TREE_TYPE (type
) = TREE_TYPE (decl
);
2838 else if (MEM_P (home
)
2839 && REG_P (XEXP (home
, 0)))
2842 number
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
2844 else if (MEM_P (home
)
2845 && GET_CODE (XEXP (home
, 0)) == PLUS
2846 && GET_CODE (XEXP (XEXP (home
, 0), 1)) == CONST_INT
)
2849 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2850 We want the value of that CONST_INT. */
2851 number
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
2853 else if (MEM_P (home
)
2854 && GET_CODE (XEXP (home
, 0)) == CONST
)
2856 /* Handle an obscure case which can arise when optimizing and
2857 when there are few available registers. (This is *always*
2858 the case for i386/i486 targets). The RTL looks like
2859 (MEM (CONST ...)) even though this variable is a local `auto'
2860 or a local `register' variable. In effect, what has happened
2861 is that the reload pass has seen that all assignments and
2862 references for one such a local variable can be replaced by
2863 equivalent assignments and references to some static storage
2864 variable, thereby avoiding the need for a register. In such
2865 cases we're forced to lie to debuggers and tell them that
2866 this variable was itself `static'. */
2869 addr
= XEXP (XEXP (home
, 0), 0);
2871 else if (GET_CODE (home
) == CONCAT
)
2875 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE,
2876 for example), then there is no easy way to figure out
2877 what SUBTYPE should be. So, we give up. */
2878 if (TREE_CODE (type
) != COMPLEX_TYPE
)
2881 subtype
= TREE_TYPE (type
);
2883 /* If the variable's storage is in two parts,
2884 output each as a separate stab with a modified name. */
2885 if (WORDS_BIG_ENDIAN
)
2886 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 0));
2888 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 0));
2890 if (WORDS_BIG_ENDIAN
)
2891 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 1));
2893 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 1));
2897 /* Address might be a MEM, when DECL is a variable-sized object.
2898 Or it might be const0_rtx, meaning previous passes
2899 want us to ignore this variable. */
2902 /* Ok, start a symtab entry and output the variable name. */
2903 emit_pending_bincls_if_required ();
2906 #ifdef DBX_STATIC_BLOCK_START
2907 DBX_STATIC_BLOCK_START (asm_out_file
, code
);
2910 dbxout_begin_complex_stabs_noforcetext ();
2911 dbxout_symbol_name (decl
, suffix
, letter
);
2912 dbxout_type (type
, 0);
2913 dbxout_finish_complex_stabs (decl
, code
, addr
, 0, number
);
2915 #ifdef DBX_STATIC_BLOCK_END
2916 DBX_STATIC_BLOCK_END (asm_out_file
, code
);
2921 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2922 Then output LETTER to indicate the kind of location the symbol has. */
2925 dbxout_symbol_name (tree decl
, const char *suffix
, int letter
)
2929 if (DECL_CONTEXT (decl
)
2930 && (TYPE_P (DECL_CONTEXT (decl
))
2931 || TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
))
2932 /* One slight hitch: if this is a VAR_DECL which is a class member
2933 or a namespace member, we must put out the mangled name instead of the
2934 DECL_NAME. Note also that static member (variable) names DO NOT begin
2935 with underscores in .stabs directives. */
2936 name
= DECL_ASSEMBLER_NAME (decl
);
2938 /* ...but if we're function-local, we don't want to include the junk
2939 added by ASM_FORMAT_PRIVATE_NAME. */
2940 name
= DECL_NAME (decl
);
2945 stabstr_S ("(anon)");
2954 /* Output definitions of all the decls in a chain. Return nonzero if
2955 anything was output */
2958 dbxout_syms (tree syms
)
2963 result
+= dbxout_symbol (syms
, 1);
2964 syms
= TREE_CHAIN (syms
);
2969 /* The following two functions output definitions of function parameters.
2970 Each parameter gets a definition locating it in the parameter list.
2971 Each parameter that is a register variable gets a second definition
2972 locating it in the register.
2974 Printing or argument lists in gdb uses the definitions that
2975 locate in the parameter list. But reference to the variable in
2976 expressions uses preferentially the definition as a register. */
2978 /* Output definitions, referring to storage in the parmlist,
2979 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2982 dbxout_parms (tree parms
)
2985 emit_pending_bincls_if_required ();
2987 for (; parms
; parms
= TREE_CHAIN (parms
))
2988 if (DECL_NAME (parms
)
2989 && TREE_TYPE (parms
) != error_mark_node
2990 && DECL_RTL_SET_P (parms
)
2991 && DECL_INCOMING_RTL (parms
))
2995 STAB_CODE_TYPE code
;
2998 /* Perform any necessary register eliminations on the parameter's rtl,
2999 so that the debugging output will be accurate. */
3000 DECL_INCOMING_RTL (parms
)
3001 = eliminate_regs (DECL_INCOMING_RTL (parms
), 0, NULL_RTX
);
3002 SET_DECL_RTL (parms
, eliminate_regs (DECL_RTL (parms
), 0, NULL_RTX
));
3003 #ifdef LEAF_REG_REMAP
3004 if (current_function_uses_only_leaf_regs
)
3006 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms
));
3007 leaf_renumber_regs_insn (DECL_RTL (parms
));
3011 if (PARM_PASSED_IN_MEMORY (parms
))
3013 rtx inrtl
= XEXP (DECL_INCOMING_RTL (parms
), 0);
3015 /* ??? Here we assume that the parm address is indexed
3016 off the frame pointer or arg pointer.
3017 If that is not true, we produce meaningless results,
3018 but do not crash. */
3019 if (GET_CODE (inrtl
) == PLUS
3020 && GET_CODE (XEXP (inrtl
, 1)) == CONST_INT
)
3021 number
= INTVAL (XEXP (inrtl
, 1));
3026 number
= DEBUGGER_ARG_OFFSET (number
, inrtl
);
3029 /* It is quite tempting to use TREE_TYPE (parms) instead
3030 of DECL_ARG_TYPE (parms) for the eff_type, so that gcc
3031 reports the actual type of the parameter, rather than
3032 the promoted type. This certainly makes GDB's life
3033 easier, at least for some ports. The change is a bad
3034 idea however, since GDB expects to be able access the
3035 type without performing any conversions. So for
3036 example, if we were passing a float to an unprototyped
3037 function, gcc will store a double on the stack, but if
3038 we emit a stab saying the type is a float, then gdb
3039 will only read in a single value, and this will produce
3040 an erroneous value. */
3041 eff_type
= DECL_ARG_TYPE (parms
);
3043 else if (REG_P (DECL_RTL (parms
)))
3047 /* Parm passed in registers and lives in registers or nowhere. */
3048 code
= DBX_REGPARM_STABS_CODE
;
3049 letter
= DBX_REGPARM_STABS_LETTER
;
3051 /* For parms passed in registers, it is better to use the
3052 declared type of the variable, not the type it arrived in. */
3053 eff_type
= TREE_TYPE (parms
);
3055 /* If parm lives in a register, use that register; pretend
3056 the parm was passed there. It would be more consistent
3057 to describe the register where the parm was passed, but
3058 in practice that register usually holds something else.
3059 If the parm lives nowhere, use the register where it
3061 if (REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
3062 best_rtl
= DECL_RTL (parms
);
3064 best_rtl
= DECL_INCOMING_RTL (parms
);
3066 number
= DBX_REGISTER_NUMBER (REGNO (best_rtl
));
3068 else if (MEM_P (DECL_RTL (parms
))
3069 && REG_P (XEXP (DECL_RTL (parms
), 0))
3070 && REGNO (XEXP (DECL_RTL (parms
), 0)) != HARD_FRAME_POINTER_REGNUM
3071 && REGNO (XEXP (DECL_RTL (parms
), 0)) != STACK_POINTER_REGNUM
3072 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
3073 && REGNO (XEXP (DECL_RTL (parms
), 0)) != ARG_POINTER_REGNUM
3077 /* Parm was passed via invisible reference.
3078 That is, its address was passed in a register.
3079 Output it as if it lived in that register.
3080 The debugger will know from the type
3081 that it was actually passed by invisible reference. */
3083 code
= DBX_REGPARM_STABS_CODE
;
3085 /* GDB likes this marked with a special letter. */
3086 letter
= (use_gnu_debug_info_extensions
3087 ? 'a' : DBX_REGPARM_STABS_LETTER
);
3088 eff_type
= TREE_TYPE (parms
);
3090 /* DECL_RTL looks like (MEM (REG...). Get the register number.
3091 If it is an unallocated pseudo-reg, then use the register where
3092 it was passed instead.
3093 ??? Why is DBX_REGISTER_NUMBER not used here? */
3095 if (REGNO (XEXP (DECL_RTL (parms
), 0)) < FIRST_PSEUDO_REGISTER
)
3096 number
= REGNO (XEXP (DECL_RTL (parms
), 0));
3098 number
= REGNO (DECL_INCOMING_RTL (parms
));
3100 else if (MEM_P (DECL_RTL (parms
))
3101 && MEM_P (XEXP (DECL_RTL (parms
), 0)))
3103 /* Parm was passed via invisible reference, with the reference
3104 living on the stack. DECL_RTL looks like
3105 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it
3106 could look like (MEM (MEM (REG))). */
3110 eff_type
= TREE_TYPE (parms
);
3112 if (!REG_P (XEXP (XEXP (DECL_RTL (parms
), 0), 0)))
3113 number
= INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms
), 0), 0), 1));
3117 number
= DEBUGGER_ARG_OFFSET (number
,
3118 XEXP (XEXP (DECL_RTL (parms
), 0), 0));
3120 else if (MEM_P (DECL_RTL (parms
))
3121 && XEXP (DECL_RTL (parms
), 0) != const0_rtx
3122 /* ??? A constant address for a parm can happen
3123 when the reg it lives in is equiv to a constant in memory.
3124 Should make this not happen, after 2.4. */
3125 && ! CONSTANT_P (XEXP (DECL_RTL (parms
), 0)))
3127 /* Parm was passed in registers but lives on the stack. */
3131 eff_type
= TREE_TYPE (parms
);
3133 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
3134 in which case we want the value of that CONST_INT,
3136 in which case we use a value of zero. */
3137 if (!REG_P (XEXP (DECL_RTL (parms
), 0)))
3138 number
= INTVAL (XEXP (XEXP (DECL_RTL (parms
), 0), 1));
3142 /* Make a big endian correction if the mode of the type of the
3143 parameter is not the same as the mode of the rtl. */
3144 if (BYTES_BIG_ENDIAN
3145 && TYPE_MODE (TREE_TYPE (parms
)) != GET_MODE (DECL_RTL (parms
))
3146 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
))) < UNITS_PER_WORD
)
3147 number
+= (GET_MODE_SIZE (GET_MODE (DECL_RTL (parms
)))
3148 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
))));
3151 /* ??? We don't know how to represent this argument. */
3154 dbxout_begin_complex_stabs ();
3156 if (DECL_NAME (parms
))
3158 stabstr_I (DECL_NAME (parms
));
3162 stabstr_S ("(anon):");
3164 dbxout_type (eff_type
, 0);
3165 dbxout_finish_complex_stabs (parms
, code
, 0, 0, number
);
3167 DBXOUT_DECR_NESTING
;
3170 /* Output definitions for the places where parms live during the function,
3171 when different from where they were passed, when the parms were passed
3174 It is not useful to do this for parms passed in registers
3175 that live during the function in different registers, because it is
3176 impossible to look in the passed register for the passed value,
3177 so we use the within-the-function register to begin with.
3179 PARMS is a chain of PARM_DECL nodes. */
3182 dbxout_reg_parms (tree parms
)
3186 for (; parms
; parms
= TREE_CHAIN (parms
))
3187 if (DECL_NAME (parms
) && PARM_PASSED_IN_MEMORY (parms
))
3189 /* Report parms that live in registers during the function
3190 but were passed in memory. */
3191 if (REG_P (DECL_RTL (parms
))
3192 && REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
3193 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3194 0, DECL_RTL (parms
));
3195 else if (GET_CODE (DECL_RTL (parms
)) == CONCAT
)
3196 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3197 0, DECL_RTL (parms
));
3198 /* Report parms that live in memory but not where they were passed. */
3199 else if (MEM_P (DECL_RTL (parms
))
3200 && ! rtx_equal_p (DECL_RTL (parms
), DECL_INCOMING_RTL (parms
)))
3201 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3202 0, DECL_RTL (parms
));
3204 DBXOUT_DECR_NESTING
;
3207 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
3208 output definitions of those names, in raw form */
3211 dbxout_args (tree args
)
3216 dbxout_type (TREE_VALUE (args
), 0);
3217 args
= TREE_CHAIN (args
);
3221 /* Subroutine of dbxout_block. Emit an N_LBRAC stab referencing LABEL.
3222 BEGIN_LABEL is the name of the beginning of the function, which may
3225 dbx_output_lbrac (const char *label
,
3226 const char *begin_label ATTRIBUTE_UNUSED
)
3228 #ifdef DBX_OUTPUT_LBRAC
3229 DBX_OUTPUT_LBRAC (asm_out_file
, label
);
3231 dbxout_begin_stabn (N_LBRAC
);
3232 if (DBX_BLOCKS_FUNCTION_RELATIVE
)
3233 dbxout_stab_value_label_diff (label
, begin_label
);
3235 dbxout_stab_value_label (label
);
3239 /* Subroutine of dbxout_block. Emit an N_RBRAC stab referencing LABEL.
3240 BEGIN_LABEL is the name of the beginning of the function, which may
3243 dbx_output_rbrac (const char *label
,
3244 const char *begin_label ATTRIBUTE_UNUSED
)
3246 #ifdef DBX_OUTPUT_RBRAC
3247 DBX_OUTPUT_RBRAC (asm_out_file
, label
);
3249 dbxout_begin_stabn (N_RBRAC
);
3250 if (DBX_BLOCKS_FUNCTION_RELATIVE
)
3251 dbxout_stab_value_label_diff (label
, begin_label
);
3253 dbxout_stab_value_label (label
);
3257 /* Output everything about a symbol block (a BLOCK node
3258 that represents a scope level),
3259 including recursive output of contained blocks.
3261 BLOCK is the BLOCK node.
3262 DEPTH is its depth within containing symbol blocks.
3263 ARGS is usually zero; but for the outermost block of the
3264 body of a function, it is a chain of PARM_DECLs for the function parameters.
3265 We output definitions of all the register parms
3266 as if they were local variables of that block.
3268 If -g1 was used, we count blocks just the same, but output nothing
3269 except for the outermost block.
3271 Actually, BLOCK may be several blocks chained together.
3272 We handle them all in sequence. */
3275 dbxout_block (tree block
, int depth
, tree args
)
3277 const char *begin_label
3278 = XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0);
3282 /* Ignore blocks never expanded or otherwise marked as real. */
3283 if (TREE_USED (block
) && TREE_ASM_WRITTEN (block
))
3286 int blocknum
= BLOCK_NUMBER (block
);
3288 /* In dbx format, the syms of a block come before the N_LBRAC.
3289 If nothing is output, we don't need the N_LBRAC, either. */
3291 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
3292 did_output
= dbxout_syms (BLOCK_VARS (block
));
3294 dbxout_reg_parms (args
);
3296 /* Now output an N_LBRAC symbol to represent the beginning of
3297 the block. Use the block's tree-walk order to generate
3298 the assembler symbols LBBn and LBEn
3299 that final will define around the code in this block. */
3303 const char *scope_start
;
3306 /* The outermost block doesn't get LBB labels; use
3307 the function symbol. */
3308 scope_start
= begin_label
;
3311 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBB", blocknum
);
3315 if (BLOCK_HANDLER_BLOCK (block
))
3317 /* A catch block. Must precede N_LBRAC. */
3318 tree decl
= BLOCK_VARS (block
);
3321 dbxout_begin_complex_stabs ();
3322 stabstr_I (DECL_NAME (decl
));
3324 dbxout_finish_complex_stabs (0, N_CATCH
, 0,
3326 decl
= TREE_CHAIN (decl
);
3329 dbx_output_lbrac (scope_start
, begin_label
);
3332 /* Output the subblocks. */
3333 dbxout_block (BLOCK_SUBBLOCKS (block
), depth
+ 1, NULL_TREE
);
3335 /* Refer to the marker for the end of the block. */
3340 /* The outermost block doesn't get LBE labels;
3341 use the "scope" label which will be emitted
3342 by dbxout_function_end. */
3343 ASM_GENERATE_INTERNAL_LABEL (buf
, "Lscope", scope_labelno
);
3345 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBE", blocknum
);
3347 dbx_output_rbrac (buf
, begin_label
);
3350 block
= BLOCK_CHAIN (block
);
3354 /* Output the information about a function and its arguments and result.
3355 Usually this follows the function's code,
3356 but on some systems, it comes before. */
3358 #if defined (DBX_DEBUGGING_INFO)
3360 dbxout_begin_function (tree decl
)
3362 int saved_tree_used1
;
3364 if (DECL_IGNORED_P (decl
))
3367 saved_tree_used1
= TREE_USED (decl
);
3368 TREE_USED (decl
) = 1;
3369 if (DECL_NAME (DECL_RESULT (decl
)) != 0)
3371 int saved_tree_used2
= TREE_USED (DECL_RESULT (decl
));
3372 TREE_USED (DECL_RESULT (decl
)) = 1;
3373 dbxout_symbol (decl
, 0);
3374 TREE_USED (DECL_RESULT (decl
)) = saved_tree_used2
;
3377 dbxout_symbol (decl
, 0);
3378 TREE_USED (decl
) = saved_tree_used1
;
3380 dbxout_parms (DECL_ARGUMENTS (decl
));
3381 if (DECL_NAME (DECL_RESULT (decl
)) != 0)
3382 dbxout_symbol (DECL_RESULT (decl
), 1);
3384 #endif /* DBX_DEBUGGING_INFO */
3386 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
3388 #include "gt-dbxout.h"