1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
21 /* Output dbx-format symbol table data.
22 This consists of many symbol table entries, each of them
23 a .stabs assembler pseudo-op with four operands:
24 a "name" which is really a description of one symbol and its type,
25 a "code", which is a symbol defined in stab.h whose name starts with N_,
26 an unused operand always 0,
27 and a "value" which is an address or an offset.
28 The name is enclosed in doublequote characters.
30 Each function, variable, typedef, and structure tag
31 has a symbol table entry to define it.
32 The beginning and end of each level of name scoping within
33 a function are also marked by special symbol table entries.
35 The "name" consists of the symbol name, a colon, a kind-of-symbol letter,
36 and a data type number. The data type number may be followed by
37 "=" and a type definition; normally this will happen the first time
38 the type number is mentioned. The type definition may refer to
39 other types by number, and those type numbers may be followed
40 by "=" and nested definitions.
42 This can make the "name" quite long.
43 When a name is more than 80 characters, we split the .stabs pseudo-op
44 into two .stabs pseudo-ops, both sharing the same "code" and "value".
45 The first one is marked as continued with a double-backslash at the
48 The kind-of-symbol letter distinguished function names from global
49 variables from file-scope variables from parameters from auto
50 variables in memory from typedef names from register variables.
53 The "code" is mostly redundant with the kind-of-symbol letter
54 that goes in the "name", but not entirely: for symbols located
55 in static storage, the "code" says which segment the address is in,
56 which controls how it is relocated.
58 The "value" for a symbol in static storage
59 is the core address of the symbol (actually, the assembler
60 label for the symbol). For a symbol located in a stack slot
61 it is the stack offset; for one in a register, the register number.
62 For a typedef symbol, it is zero.
64 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
65 output while in the text section.
67 For more on data type definitions, see `dbxout_type'. */
71 #include "coretypes.h"
76 #include "double-int.h"
83 #include "fold-const.h"
85 #include "stor-layout.h"
89 #include "insn-config.h"
93 #include "diagnostic-core.h"
101 #include "machmode.h"
102 #include "hard-reg-set.h"
104 #include "function.h"
106 #include "common/common-target.h"
107 #include "langhooks.h"
110 #include "hash-map.h"
112 #include "plugin-api.h"
115 #include "stringpool.h"
117 #ifdef XCOFF_DEBUGGING_INFO
118 #include "xcoffout.h"
122 # ifdef XCOFF_DEBUGGING_INFO
123 # define ASM_STABS_OP "\t.stabx\t"
125 # define ASM_STABS_OP "\t.stabs\t"
130 #define ASM_STABN_OP "\t.stabn\t"
134 #define ASM_STABD_OP "\t.stabd\t"
137 #ifndef DBX_TYPE_DECL_STABS_CODE
138 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
141 #ifndef DBX_STATIC_CONST_VAR_CODE
142 #define DBX_STATIC_CONST_VAR_CODE N_FUN
145 #ifndef DBX_REGPARM_STABS_CODE
146 #define DBX_REGPARM_STABS_CODE N_RSYM
149 #ifndef DBX_REGPARM_STABS_LETTER
150 #define DBX_REGPARM_STABS_LETTER 'P'
153 #ifndef NO_DBX_FUNCTION_END
154 #define NO_DBX_FUNCTION_END 0
157 #ifndef NO_DBX_BNSYM_ENSYM
158 #define NO_DBX_BNSYM_ENSYM 0
161 #ifndef NO_DBX_MAIN_SOURCE_DIRECTORY
162 #define NO_DBX_MAIN_SOURCE_DIRECTORY 0
165 #ifndef DBX_BLOCKS_FUNCTION_RELATIVE
166 #define DBX_BLOCKS_FUNCTION_RELATIVE 0
169 #ifndef DBX_LINES_FUNCTION_RELATIVE
170 #define DBX_LINES_FUNCTION_RELATIVE 0
173 #ifndef DBX_CONTIN_LENGTH
174 #define DBX_CONTIN_LENGTH 80
177 #ifndef DBX_CONTIN_CHAR
178 #define DBX_CONTIN_CHAR '\\'
181 enum typestatus
{TYPE_UNSEEN
, TYPE_XREF
, TYPE_DEFINED
};
183 /* Structure recording information about a C data type.
184 The status element says whether we have yet output
185 the definition of the type. TYPE_XREF says we have
186 output it as a cross-reference only.
187 The file_number and type_number elements are used if DBX_USE_BINCL
190 struct GTY(()) typeinfo
{
191 enum typestatus status
;
196 /* Vector recording information about C data types.
197 When we first notice a data type (a tree node),
198 we assign it a number using next_type_number.
199 That is its index in this vector. */
201 static GTY ((length ("typevec_len"))) struct typeinfo
*typevec
;
203 /* Number of elements of space allocated in `typevec'. */
205 static GTY(()) int typevec_len
;
207 /* In dbx output, each type gets a unique number.
208 This is the number for the next type output.
209 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
211 static GTY(()) int next_type_number
;
213 /* The C front end may call dbxout_symbol before dbxout_init runs.
214 We save all such decls in this list and output them when we get
217 static GTY(()) tree preinit_symbols
;
219 enum binclstatus
{BINCL_NOT_REQUIRED
, BINCL_PENDING
, BINCL_PROCESSED
};
221 /* When using N_BINCL in dbx output, each type number is actually a
222 pair of the file number and the type number within the file.
223 This is a stack of input files. */
227 struct dbx_file
*next
;
229 int next_type_number
;
230 enum binclstatus bincl_status
; /* Keep track of lazy bincl. */
231 const char *pending_bincl_name
; /* Name of bincl. */
232 struct dbx_file
*prev
; /* Chain to traverse all pending bincls. */
235 /* This is the top of the stack.
237 This is not saved for PCH, because restoring a PCH should not change it.
238 next_file_number does have to be saved, because the PCH may use some
239 file numbers; however, just before restoring a PCH, next_file_number
240 should always be 0 because we should not have needed any file numbers
243 #if (defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)) \
244 && defined (DBX_USE_BINCL)
245 static struct dbx_file
*current_file
;
248 /* This is the next file number to use. */
250 static GTY(()) int next_file_number
;
252 /* A counter for dbxout_function_end. */
254 static GTY(()) int scope_labelno
;
256 /* A counter for dbxout_source_line. */
258 static GTY(()) int dbxout_source_line_counter
;
260 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
261 for the N_SO filename stabs label. */
263 static GTY(()) int source_label_number
= 1;
265 /* Last source file name mentioned in a NOTE insn. */
267 static GTY(()) const char *lastfile
;
269 /* Used by PCH machinery to detect if 'lastfile' should be reset to
271 static GTY(()) int lastfile_is_base
;
273 /* Typical USG systems don't have stab.h, and they also have
274 no use for DBX-format debugging info. */
276 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
279 /* If zero then there is no pending BINCL. */
280 static int pending_bincls
= 0;
283 /* The original input file name. */
284 static const char *base_input_file
;
286 #ifdef DEBUG_SYMS_TEXT
287 #define FORCE_TEXT switch_to_section (current_function_section ())
294 /* 1 if PARM is passed to this function in memory. */
296 #define PARM_PASSED_IN_MEMORY(PARM) \
297 (MEM_P (DECL_INCOMING_RTL (PARM)))
299 /* A C expression for the integer offset value of an automatic variable
300 (N_LSYM) having address X (an RTX). */
301 #ifndef DEBUGGER_AUTO_OFFSET
302 #define DEBUGGER_AUTO_OFFSET(X) \
303 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
306 /* A C expression for the integer offset value of an argument (N_PSYM)
307 having address X (an RTX). The nominal offset is OFFSET.
308 Note that we use OFFSET + 0 here to avoid the self-assign warning
309 when the macro is called in a context like
310 number = DEBUGGER_ARG_OFFSET(number, X) */
311 #ifndef DEBUGGER_ARG_OFFSET
312 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET + 0)
315 /* This obstack holds the stab string currently being constructed. We
316 build it up here, then write it out, so we can split long lines up
317 properly (see dbxout_finish_complex_stabs). */
318 static struct obstack stabstr_ob
;
319 static size_t stabstr_last_contin_point
;
322 static void emit_bincl_stab (const char *c
);
323 static void emit_pending_bincls (void);
325 static inline void emit_pending_bincls_if_required (void);
327 static void dbxout_init (const char *);
329 static void dbxout_finish (const char *);
330 static void dbxout_start_source_file (unsigned, const char *);
331 static void dbxout_end_source_file (unsigned);
332 static void dbxout_typedefs (tree
);
333 static void dbxout_type_index (tree
);
334 static void dbxout_args (tree
);
335 static void dbxout_type_fields (tree
);
336 static void dbxout_type_method_1 (tree
);
337 static void dbxout_type_methods (tree
);
338 static void dbxout_range_type (tree
, tree
, tree
);
339 static void dbxout_type (tree
, int);
340 static bool print_int_cst_bounds_in_octal_p (tree
, tree
, tree
);
341 static bool is_fortran (void);
342 static void dbxout_type_name (tree
);
343 static void dbxout_class_name_qualifiers (tree
);
344 static int dbxout_symbol_location (tree
, tree
, const char *, rtx
);
345 static void dbxout_symbol_name (tree
, const char *, int);
346 static void dbxout_common_name (tree
, const char *, stab_code_type
);
347 static const char *dbxout_common_check (tree
, int *);
348 static void dbxout_global_decl (tree
);
349 static void dbxout_type_decl (tree
, int);
350 static void dbxout_handle_pch (unsigned);
351 static void debug_free_queue (void);
353 /* The debug hooks structure. */
354 #if defined (DBX_DEBUGGING_INFO)
356 static void dbxout_source_line (unsigned int, const char *, int, bool);
357 static void dbxout_begin_prologue (unsigned int, const char *);
358 static void dbxout_source_file (const char *);
359 static void dbxout_function_end (tree
);
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
=
370 debug_nothing_int_charstar
,
371 debug_nothing_int_charstar
,
372 dbxout_start_source_file
,
373 dbxout_end_source_file
,
376 debug_true_const_tree
, /* ignore_block */
377 dbxout_source_line
, /* source_line */
378 dbxout_begin_prologue
, /* begin_prologue */
379 debug_nothing_int_charstar
, /* end_prologue */
380 debug_nothing_int_charstar
, /* begin_epilogue */
381 debug_nothing_int_charstar
, /* end_epilogue */
382 #ifdef DBX_FUNCTION_FIRST
383 dbxout_begin_function
,
385 debug_nothing_tree
, /* begin_function */
387 debug_nothing_int
, /* end_function */
388 dbxout_function_decl
,
389 dbxout_global_decl
, /* global_decl */
390 dbxout_type_decl
, /* type_decl */
391 debug_nothing_tree_tree_tree_bool
, /* imported_module_or_decl */
392 debug_nothing_tree
, /* deferred_inline_function */
393 debug_nothing_tree
, /* outlining_inline_function */
394 debug_nothing_rtx_code_label
, /* label */
395 dbxout_handle_pch
, /* handle_pch */
396 debug_nothing_rtx_insn
, /* var_location */
397 debug_nothing_void
, /* switch_text_section */
398 debug_nothing_tree_tree
, /* set_name */
399 0, /* start_end_main_source_file */
400 TYPE_SYMTAB_IS_ADDRESS
/* tree_type_symtab_field */
402 #endif /* DBX_DEBUGGING_INFO */
404 #if defined (XCOFF_DEBUGGING_INFO)
405 const struct gcc_debug_hooks xcoff_debug_hooks
=
410 debug_nothing_int_charstar
,
411 debug_nothing_int_charstar
,
412 dbxout_start_source_file
,
413 dbxout_end_source_file
,
414 xcoffout_begin_block
,
416 debug_true_const_tree
, /* ignore_block */
417 xcoffout_source_line
,
418 xcoffout_begin_prologue
, /* begin_prologue */
419 debug_nothing_int_charstar
, /* end_prologue */
420 debug_nothing_int_charstar
, /* begin_epilogue */
421 xcoffout_end_epilogue
,
422 debug_nothing_tree
, /* begin_function */
423 xcoffout_end_function
,
424 debug_nothing_tree
, /* function_decl */
425 dbxout_global_decl
, /* global_decl */
426 dbxout_type_decl
, /* type_decl */
427 debug_nothing_tree_tree_tree_bool
, /* imported_module_or_decl */
428 debug_nothing_tree
, /* deferred_inline_function */
429 debug_nothing_tree
, /* outlining_inline_function */
430 debug_nothing_rtx_code_label
, /* label */
431 dbxout_handle_pch
, /* handle_pch */
432 debug_nothing_rtx_insn
, /* var_location */
433 debug_nothing_void
, /* switch_text_section */
434 debug_nothing_tree_tree
, /* set_name */
435 0, /* start_end_main_source_file */
436 TYPE_SYMTAB_IS_ADDRESS
/* tree_type_symtab_field */
438 #endif /* XCOFF_DEBUGGING_INFO */
440 /* Numeric formatting helper macro. Note that this does not handle
442 #define NUMBER_FMT_LOOP(P, NUM, BASE) \
445 int digit = NUM % BASE; \
447 *--P = digit + '0'; \
451 /* Utility: write a decimal integer NUM to asm_out_file. */
456 char *p
= buf
+ sizeof buf
;
461 putc ('0', asm_out_file
);
466 putc ('-', asm_out_file
);
472 NUMBER_FMT_LOOP (p
, unum
, 10);
474 while (p
< buf
+ sizeof buf
)
476 putc (*p
, asm_out_file
);
482 /* Primitives for emitting simple stabs directives. All other stabs
483 routines should use these functions instead of directly emitting
484 stabs. They are exported because machine-dependent code may need
485 to invoke them, e.g. in a DBX_OUTPUT_* macro whose definition
486 forwards to code in CPU.c. */
488 /* The following functions should all be called immediately after one
489 of the dbxout_begin_stab* functions (below). They write out
490 various things as the value of a stab. */
492 /* Write out a literal zero as the value of a stab. */
494 dbxout_stab_value_zero (void)
496 fputs ("0\n", asm_out_file
);
499 /* Write out the label LABEL as the value of a stab. */
501 dbxout_stab_value_label (const char *label
)
503 assemble_name (asm_out_file
, label
);
504 putc ('\n', asm_out_file
);
507 /* Write out the difference of two labels, LABEL - BASE, as the value
510 dbxout_stab_value_label_diff (const char *label
, const char *base
)
512 assemble_name (asm_out_file
, label
);
513 putc ('-', asm_out_file
);
514 assemble_name (asm_out_file
, base
);
515 putc ('\n', asm_out_file
);
518 /* Write out an internal label as the value of a stab, and immediately
519 emit that internal label. This should be used only when
520 dbxout_stabd will not work. STEM is the name stem of the label,
521 COUNTERP is a pointer to a counter variable which will be used to
522 guarantee label uniqueness. */
524 dbxout_stab_value_internal_label (const char *stem
, int *counterp
)
527 int counter
= counterp
? (*counterp
)++ : 0;
529 ASM_GENERATE_INTERNAL_LABEL (label
, stem
, counter
);
530 dbxout_stab_value_label (label
);
531 targetm
.asm_out
.internal_label (asm_out_file
, stem
, counter
);
534 /* Write out the difference between BASE and an internal label as the
535 value of a stab, and immediately emit that internal label. STEM and
536 COUNTERP are as for dbxout_stab_value_internal_label. */
538 dbxout_stab_value_internal_label_diff (const char *stem
, int *counterp
,
542 int counter
= counterp
? (*counterp
)++ : 0;
544 ASM_GENERATE_INTERNAL_LABEL (label
, stem
, counter
);
545 dbxout_stab_value_label_diff (label
, base
);
546 targetm
.asm_out
.internal_label (asm_out_file
, stem
, counter
);
549 /* The following functions produce specific kinds of stab directives. */
551 /* Write a .stabd directive with type STYPE and desc SDESC to asm_out_file. */
553 dbxout_stabd (int stype
, int sdesc
)
555 fputs (ASM_STABD_OP
, asm_out_file
);
557 fputs (",0,", asm_out_file
);
559 putc ('\n', asm_out_file
);
562 /* Write a .stabn directive with type STYPE. This function stops
563 short of emitting the value field, which is the responsibility of
564 the caller (normally it will be either a symbol or the difference
568 dbxout_begin_stabn (int stype
)
570 fputs (ASM_STABN_OP
, asm_out_file
);
572 fputs (",0,0,", asm_out_file
);
575 /* Write a .stabn directive with type N_SLINE and desc LINE. As above,
576 the value field is the responsibility of the caller. */
578 dbxout_begin_stabn_sline (int lineno
)
580 fputs (ASM_STABN_OP
, asm_out_file
);
581 dbxout_int (N_SLINE
);
582 fputs (",0,", asm_out_file
);
584 putc (',', asm_out_file
);
587 /* Begin a .stabs directive with string "", type STYPE, and desc and
588 other fields 0. The value field is the responsibility of the
589 caller. This function cannot be used for .stabx directives. */
591 dbxout_begin_empty_stabs (int stype
)
593 fputs (ASM_STABS_OP
, asm_out_file
);
594 fputs ("\"\",", asm_out_file
);
596 fputs (",0,0,", asm_out_file
);
599 /* Begin a .stabs directive with string STR, type STYPE, and desc 0.
600 The value field is the responsibility of the caller. */
602 dbxout_begin_simple_stabs (const char *str
, int stype
)
604 fputs (ASM_STABS_OP
, asm_out_file
);
605 output_quoted_string (asm_out_file
, str
);
606 putc (',', asm_out_file
);
608 fputs (",0,0,", asm_out_file
);
611 /* As above but use SDESC for the desc field. */
613 dbxout_begin_simple_stabs_desc (const char *str
, int stype
, int sdesc
)
615 fputs (ASM_STABS_OP
, asm_out_file
);
616 output_quoted_string (asm_out_file
, str
);
617 putc (',', asm_out_file
);
619 fputs (",0,", asm_out_file
);
621 putc (',', asm_out_file
);
624 /* The next set of functions are entirely concerned with production of
625 "complex" .stabs directives: that is, .stabs directives whose
626 strings have to be constructed piecemeal. dbxout_type,
627 dbxout_symbol, etc. use these routines heavily. The string is queued
628 up in an obstack, then written out by dbxout_finish_complex_stabs, which
629 is also responsible for splitting it up if it exceeds DBX_CONTIN_LENGTH.
630 (You might think it would be more efficient to go straight to stdio
631 when DBX_CONTIN_LENGTH is 0 (i.e. no length limit) but that turns
632 out not to be the case, and anyway this needs fewer #ifdefs.) */
634 /* Begin a complex .stabs directive. If we can, write the initial
635 ASM_STABS_OP to the asm_out_file. */
638 dbxout_begin_complex_stabs (void)
640 emit_pending_bincls_if_required ();
642 fputs (ASM_STABS_OP
, asm_out_file
);
643 putc ('"', asm_out_file
);
644 gcc_assert (stabstr_last_contin_point
== 0);
647 /* As above, but do not force text or emit pending bincls. This is
648 used by dbxout_symbol_location, which needs to do something else. */
650 dbxout_begin_complex_stabs_noforcetext (void)
652 fputs (ASM_STABS_OP
, asm_out_file
);
653 putc ('"', asm_out_file
);
654 gcc_assert (stabstr_last_contin_point
== 0);
657 /* Add CHR, a single character, to the string being built. */
658 #define stabstr_C(chr) obstack_1grow (&stabstr_ob, chr)
660 /* Add STR, a normal C string, to the string being built. */
661 #define stabstr_S(str) obstack_grow (&stabstr_ob, str, strlen (str))
663 /* Add the text of ID, an IDENTIFIER_NODE, to the string being built. */
664 #define stabstr_I(id) obstack_grow (&stabstr_ob, \
665 IDENTIFIER_POINTER (id), \
666 IDENTIFIER_LENGTH (id))
668 /* Add NUM, a signed decimal number, to the string being built. */
670 stabstr_D (HOST_WIDE_INT num
)
673 char *p
= buf
+ sizeof buf
;
689 NUMBER_FMT_LOOP (p
, unum
, 10);
691 obstack_grow (&stabstr_ob
, p
, (buf
+ sizeof buf
) - p
);
694 /* Add NUM, an unsigned decimal number, to the string being built. */
696 stabstr_U (unsigned HOST_WIDE_INT num
)
699 char *p
= buf
+ sizeof buf
;
705 NUMBER_FMT_LOOP (p
, num
, 10);
706 obstack_grow (&stabstr_ob
, p
, (buf
+ sizeof buf
) - p
);
709 /* Add CST, an INTEGER_CST tree, to the string being built as an
710 unsigned octal number. This routine handles values which are
711 larger than a single HOST_WIDE_INT. */
715 int prec
= TYPE_PRECISION (TREE_TYPE (cst
));
716 int res_pres
= prec
% 3;
720 /* Leading zero for base indicator. */
723 /* If the value is zero, the base indicator will serve as the value
725 if (wi::eq_p (cst
, 0))
728 /* GDB wants constants with no extra leading "1" bits, so
729 we need to remove any sign-extension that might be
733 digit
= wi::extract_uhwi (cst
, prec
- 1, 1);
734 stabstr_C ('0' + digit
);
736 else if (res_pres
== 2)
738 digit
= wi::extract_uhwi (cst
, prec
- 2, 2);
739 stabstr_C ('0' + digit
);
743 for (i
= prec
- 3; i
>= 0; i
= i
- 3)
745 digit
= wi::extract_uhwi (cst
, i
, 3);
746 stabstr_C ('0' + digit
);
750 /* Called whenever it is safe to break a stabs string into multiple
751 .stabs directives. If the current string has exceeded the limit
752 set by DBX_CONTIN_LENGTH, mark the current position in the buffer
753 as a continuation point by inserting DBX_CONTIN_CHAR (doubled if
754 it is a backslash) and a null character. */
756 stabstr_continue (void)
758 if (DBX_CONTIN_LENGTH
> 0
759 && obstack_object_size (&stabstr_ob
) - stabstr_last_contin_point
762 if (DBX_CONTIN_CHAR
== '\\')
763 obstack_1grow (&stabstr_ob
, '\\');
764 obstack_1grow (&stabstr_ob
, DBX_CONTIN_CHAR
);
765 obstack_1grow (&stabstr_ob
, '\0');
766 stabstr_last_contin_point
= obstack_object_size (&stabstr_ob
);
769 #define CONTIN stabstr_continue ()
771 /* Macro subroutine of dbxout_finish_complex_stabs, which emits
772 all of the arguments to the .stabs directive after the string.
773 Overridden by xcoffout.h. CODE is the stabs code for this symbol;
774 LINE is the source line to write into the desc field (in extended
775 mode); SYM is the symbol itself.
777 ADDR, LABEL, and NUMBER are three different ways to represent the
778 stabs value field. At most one of these should be nonzero.
780 ADDR is used most of the time; it represents the value as an
781 RTL address constant.
783 LABEL is used (currently) only for N_CATCH stabs; it represents
784 the value as a string suitable for assemble_name.
786 NUMBER is used when the value is an offset from an implicit base
787 pointer (e.g. for a stack variable), or an index (e.g. for a
788 register variable). It represents the value as a decimal integer. */
790 #ifndef DBX_FINISH_STABS
791 #define DBX_FINISH_STABS(SYM, CODE, LINE, ADDR, LABEL, NUMBER) \
793 int line_ = use_gnu_debug_info_extensions ? LINE : 0; \
796 fputs (",0,", asm_out_file); \
797 dbxout_int (line_); \
798 putc (',', asm_out_file); \
800 output_addr_const (asm_out_file, ADDR); \
802 assemble_name (asm_out_file, LABEL); \
804 dbxout_int (NUMBER); \
805 putc ('\n', asm_out_file); \
809 /* Finish the emission of a complex .stabs directive. When DBX_CONTIN_LENGTH
810 is zero, this has only to emit the close quote and the remainder of
811 the arguments. When it is nonzero, the string has been marshalled in
812 stabstr_ob, and this routine is responsible for breaking it up into
813 DBX_CONTIN_LENGTH-sized chunks.
815 SYM is the DECL of the symbol under consideration; it is used only
816 for its DECL_SOURCE_LINE. The other arguments are all passed directly
817 to DBX_FINISH_STABS; see above for details. */
820 dbxout_finish_complex_stabs (tree sym
, stab_code_type code
,
821 rtx addr
, const char *label
, int number
)
823 int line ATTRIBUTE_UNUSED
;
827 line
= sym
? DECL_SOURCE_LINE (sym
) : 0;
828 if (DBX_CONTIN_LENGTH
> 0)
833 /* Nul-terminate the growing string, then get its size and
835 obstack_1grow (&stabstr_ob
, '\0');
837 len
= obstack_object_size (&stabstr_ob
);
838 chunk
= str
= XOBFINISH (&stabstr_ob
, char *);
840 /* Within the buffer are a sequence of NUL-separated strings,
841 each of which is to be written out as a separate stab
845 chunklen
= strlen (chunk
);
846 fwrite (chunk
, 1, chunklen
, asm_out_file
);
847 fputs ("\",", asm_out_file
);
849 /* Must add an extra byte to account for the NUL separator. */
850 chunk
+= chunklen
+ 1;
853 /* Only put a line number on the last stab in the sequence. */
854 DBX_FINISH_STABS (sym
, code
, len
== 0 ? line
: 0,
855 addr
, label
, number
);
859 fputs (ASM_STABS_OP
, asm_out_file
);
860 putc ('"', asm_out_file
);
862 stabstr_last_contin_point
= 0;
866 /* No continuations - we can put the whole string out at once.
867 It is faster to augment the string with the close quote and
868 comma than to do a two-character fputs. */
869 obstack_grow (&stabstr_ob
, "\",", 2);
870 len
= obstack_object_size (&stabstr_ob
);
871 str
= XOBFINISH (&stabstr_ob
, char *);
873 fwrite (str
, 1, len
, asm_out_file
);
874 DBX_FINISH_STABS (sym
, code
, line
, addr
, label
, number
);
876 obstack_free (&stabstr_ob
, str
);
879 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
881 /* When -gused is used, emit debug info for only used symbols. But in
882 addition to the standard intercepted debug_hooks there are some
883 direct calls into this file, i.e., dbxout_symbol, dbxout_parms, and
884 dbxout_reg_params. Those routines may also be called from a higher
885 level intercepted routine. So to prevent recording data for an inner
886 call to one of these for an intercept, we maintain an intercept
887 nesting counter (debug_nesting). We only save the intercepted
888 arguments if the nesting is 1. */
889 static int debug_nesting
= 0;
891 static tree
*symbol_queue
;
892 static int symbol_queue_index
= 0;
893 static int symbol_queue_size
= 0;
895 #define DBXOUT_DECR_NESTING \
896 if (--debug_nesting == 0 && symbol_queue_index > 0) \
897 { emit_pending_bincls_if_required (); debug_flush_symbol_queue (); }
899 #define DBXOUT_DECR_NESTING_AND_RETURN(x) \
900 do {--debug_nesting; return (x);} while (0)
902 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
904 #if defined (DBX_DEBUGGING_INFO)
907 dbxout_function_end (tree decl ATTRIBUTE_UNUSED
)
909 char lscope_label_name
[100];
911 /* The Lscope label must be emitted even if we aren't doing anything
912 else; dbxout_block needs it. */
913 switch_to_section (function_section (current_function_decl
));
915 /* Convert Lscope into the appropriate format for local labels in case
916 the system doesn't insert underscores in front of user generated
918 ASM_GENERATE_INTERNAL_LABEL (lscope_label_name
, "Lscope", scope_labelno
);
919 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_common
.have_named_sections
)
929 /* By convention, GCC will mark the end of a function with an N_FUN
930 symbol and an empty string. */
931 if (flag_reorder_blocks_and_partition
)
933 dbxout_begin_empty_stabs (N_FUN
);
934 dbxout_stab_value_label_diff (crtl
->subsections
.hot_section_end_label
,
935 crtl
->subsections
.hot_section_label
);
936 dbxout_begin_empty_stabs (N_FUN
);
937 dbxout_stab_value_label_diff (crtl
->subsections
.cold_section_end_label
,
938 crtl
->subsections
.cold_section_label
);
942 char begin_label
[20];
943 /* Reference current function start using LFBB. */
944 ASM_GENERATE_INTERNAL_LABEL (begin_label
, "LFBB", scope_labelno
);
945 dbxout_begin_empty_stabs (N_FUN
);
946 dbxout_stab_value_label_diff (lscope_label_name
, begin_label
);
949 if (!NO_DBX_BNSYM_ENSYM
&& !flag_debug_only_used_symbols
)
950 dbxout_stabd (N_ENSYM
, 0);
952 #endif /* DBX_DEBUGGING_INFO */
954 /* Get lang description for N_SO stab. */
955 static unsigned int ATTRIBUTE_UNUSED
956 get_lang_number (void)
958 const char *language_string
= lang_hooks
.name
;
961 else if (lang_GNU_CXX ())
963 else if (strcmp (language_string
, "GNU F77") == 0)
965 else if (strcmp (language_string
, "GNU Fortran") == 0)
966 return N_SO_FORTRAN90
; /* CHECKME */
967 else if (strcmp (language_string
, "GNU Pascal") == 0)
969 else if (strcmp (language_string
, "GNU Objective-C") == 0)
971 else if (strcmp (language_string
, "GNU Objective-C++") == 0)
972 return N_SO_OBJCPLUS
;
981 unsigned int lang
= get_lang_number ();
983 return (lang
== N_SO_FORTRAN
) || (lang
== N_SO_FORTRAN90
);
986 /* At the beginning of compilation, start writing the symbol table.
987 Initialize `typevec' and output the standard data types of C. */
990 dbxout_init (const char *input_file_name
)
992 char ltext_label_name
[100];
993 bool used_ltext_label_name
= false;
994 tree syms
= lang_hooks
.decls
.getdecls ();
995 const char *mapped_name
;
998 typevec
= ggc_cleared_vec_alloc
<typeinfo
> (typevec_len
);
1000 /* stabstr_ob contains one string, which will be just fine with
1001 1-byte alignment. */
1002 obstack_specify_allocation (&stabstr_ob
, 0, 1, xmalloc
, free
);
1004 /* Convert Ltext into the appropriate format for local labels in case
1005 the system doesn't insert underscores in front of user generated
1007 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name
, "Ltext", 0);
1009 /* Put the current working directory in an N_SO symbol. */
1010 if (use_gnu_debug_info_extensions
&& !NO_DBX_MAIN_SOURCE_DIRECTORY
)
1012 static const char *cwd
;
1016 cwd
= get_src_pwd ();
1019 else if (!IS_DIR_SEPARATOR (cwd
[strlen (cwd
) - 1]))
1020 cwd
= concat (cwd
, "/", NULL
);
1021 cwd
= remap_debug_filename (cwd
);
1023 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
1024 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asm_out_file
, cwd
);
1025 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
1026 dbxout_begin_simple_stabs_desc (cwd
, N_SO
, get_lang_number ());
1027 dbxout_stab_value_label (ltext_label_name
);
1028 used_ltext_label_name
= true;
1029 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
1032 mapped_name
= remap_debug_filename (input_file_name
);
1033 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
1034 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asm_out_file
, mapped_name
);
1036 dbxout_begin_simple_stabs_desc (mapped_name
, N_SO
, get_lang_number ());
1037 dbxout_stab_value_label (ltext_label_name
);
1038 used_ltext_label_name
= true;
1041 if (used_ltext_label_name
)
1043 switch_to_section (text_section
);
1044 targetm
.asm_out
.internal_label (asm_out_file
, "Ltext", 0);
1047 /* Emit an N_OPT stab to indicate that this file was compiled by GCC.
1048 The string used is historical. */
1049 #ifndef NO_DBX_GCC_MARKER
1050 dbxout_begin_simple_stabs ("gcc2_compiled.", N_OPT
);
1051 dbxout_stab_value_zero ();
1054 base_input_file
= lastfile
= input_file_name
;
1056 next_type_number
= 1;
1058 #ifdef DBX_USE_BINCL
1059 current_file
= XNEW (struct dbx_file
);
1060 current_file
->next
= NULL
;
1061 current_file
->file_number
= 0;
1062 current_file
->next_type_number
= 1;
1063 next_file_number
= 1;
1064 current_file
->prev
= NULL
;
1065 current_file
->bincl_status
= BINCL_NOT_REQUIRED
;
1066 current_file
->pending_bincl_name
= NULL
;
1069 /* Get all permanent types that have typedef names, and output them
1070 all, except for those already output. Some language front ends
1071 put these declarations in the top-level scope; some do not;
1072 the latter are responsible for calling debug_hooks->type_decl from
1073 their record_builtin_type function. */
1074 dbxout_typedefs (syms
);
1076 if (preinit_symbols
)
1079 for (t
= nreverse (preinit_symbols
); t
; t
= TREE_CHAIN (t
))
1080 dbxout_symbol (TREE_VALUE (t
), 0);
1081 preinit_symbols
= 0;
1085 /* Output any typedef names for types described by TYPE_DECLs in SYMS. */
1088 dbxout_typedefs (tree syms
)
1090 for (; syms
!= NULL_TREE
; syms
= DECL_CHAIN (syms
))
1092 if (TREE_CODE (syms
) == TYPE_DECL
)
1094 tree type
= TREE_TYPE (syms
);
1095 if (TYPE_NAME (type
)
1096 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1097 && COMPLETE_OR_VOID_TYPE_P (type
)
1098 && ! TREE_ASM_WRITTEN (TYPE_NAME (type
)))
1099 dbxout_symbol (TYPE_NAME (type
), 0);
1104 #ifdef DBX_USE_BINCL
1105 /* Emit BINCL stab using given name. */
1107 emit_bincl_stab (const char *name
)
1109 dbxout_begin_simple_stabs (name
, N_BINCL
);
1110 dbxout_stab_value_zero ();
1113 /* If there are pending bincls then it is time to emit all of them. */
1116 emit_pending_bincls_if_required (void)
1119 emit_pending_bincls ();
1122 /* Emit all pending bincls. */
1125 emit_pending_bincls (void)
1127 struct dbx_file
*f
= current_file
;
1129 /* Find first pending bincl. */
1130 while (f
->bincl_status
== BINCL_PENDING
)
1133 /* Now emit all bincls. */
1138 if (f
->bincl_status
== BINCL_PENDING
)
1140 emit_bincl_stab (f
->pending_bincl_name
);
1142 /* Update file number and status. */
1143 f
->file_number
= next_file_number
++;
1144 f
->bincl_status
= BINCL_PROCESSED
;
1146 if (f
== current_file
)
1151 /* All pending bincls have been emitted. */
1158 emit_pending_bincls_if_required (void) {}
1161 /* Change to reading from a new source file. Generate a N_BINCL stab. */
1164 dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED
,
1165 const char *filename ATTRIBUTE_UNUSED
)
1167 #ifdef DBX_USE_BINCL
1168 struct dbx_file
*n
= XNEW (struct dbx_file
);
1170 n
->next
= current_file
;
1171 n
->next_type_number
= 1;
1172 /* Do not assign file number now.
1173 Delay it until we actually emit BINCL. */
1176 current_file
->prev
= n
;
1177 n
->bincl_status
= BINCL_PENDING
;
1178 n
->pending_bincl_name
= remap_debug_filename (filename
);
1184 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
1187 dbxout_end_source_file (unsigned int line ATTRIBUTE_UNUSED
)
1189 #ifdef DBX_USE_BINCL
1190 /* Emit EINCL stab only if BINCL is not pending. */
1191 if (current_file
->bincl_status
== BINCL_PROCESSED
)
1193 dbxout_begin_stabn (N_EINCL
);
1194 dbxout_stab_value_zero ();
1196 current_file
->bincl_status
= BINCL_NOT_REQUIRED
;
1197 current_file
= current_file
->next
;
1201 /* Handle a few odd cases that occur when trying to make PCH files work. */
1204 dbxout_handle_pch (unsigned at_end
)
1208 /* When using the PCH, this file will be included, so we need to output
1210 dbxout_start_source_file (0, lastfile
);
1212 /* The base file when using the PCH won't be the same as
1213 the base file when it's being generated. */
1218 /* ... and an EINCL. */
1219 dbxout_end_source_file (0);
1221 /* Deal with cases where 'lastfile' was never actually changed. */
1222 lastfile_is_base
= lastfile
== NULL
;
1226 #if defined (DBX_DEBUGGING_INFO)
1228 static void dbxout_block (tree
, int, tree
);
1230 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
1233 dbxout_source_file (const char *filename
)
1235 if (lastfile
== 0 && lastfile_is_base
)
1237 lastfile
= base_input_file
;
1238 lastfile_is_base
= 0;
1241 if (filename
&& (lastfile
== 0 || strcmp (filename
, lastfile
)))
1243 /* Don't change section amid function. */
1244 if (current_function_decl
== NULL_TREE
)
1245 switch_to_section (text_section
);
1247 dbxout_begin_simple_stabs (remap_debug_filename (filename
), N_SOL
);
1248 dbxout_stab_value_internal_label ("Ltext", &source_label_number
);
1249 lastfile
= filename
;
1253 /* Output N_BNSYM, line number symbol entry, and local symbol at
1257 dbxout_begin_prologue (unsigned int lineno
, const char *filename
)
1259 if (use_gnu_debug_info_extensions
1260 && !NO_DBX_FUNCTION_END
1261 && !NO_DBX_BNSYM_ENSYM
1262 && !flag_debug_only_used_symbols
)
1263 dbxout_stabd (N_BNSYM
, 0);
1265 /* pre-increment the scope counter */
1268 dbxout_source_line (lineno
, filename
, 0, true);
1269 /* Output function begin block at function scope, referenced
1270 by dbxout_block, dbxout_source_line and dbxout_function_end. */
1271 emit_pending_bincls_if_required ();
1272 targetm
.asm_out
.internal_label (asm_out_file
, "LFBB", scope_labelno
);
1275 /* Output a line number symbol entry for source file FILENAME and line
1279 dbxout_source_line (unsigned int lineno
, const char *filename
,
1280 int discriminator ATTRIBUTE_UNUSED
,
1281 bool is_stmt ATTRIBUTE_UNUSED
)
1283 dbxout_source_file (filename
);
1285 #ifdef DBX_OUTPUT_SOURCE_LINE
1286 DBX_OUTPUT_SOURCE_LINE (asm_out_file
, lineno
, dbxout_source_line_counter
);
1288 if (DBX_LINES_FUNCTION_RELATIVE
)
1290 char begin_label
[20];
1291 dbxout_begin_stabn_sline (lineno
);
1292 /* Reference current function start using LFBB. */
1293 ASM_GENERATE_INTERNAL_LABEL (begin_label
, "LFBB", scope_labelno
);
1294 dbxout_stab_value_internal_label_diff ("LM", &dbxout_source_line_counter
,
1298 dbxout_stabd (N_SLINE
, lineno
);
1302 /* Describe the beginning of an internal block within a function. */
1305 dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED
, unsigned int n
)
1307 emit_pending_bincls_if_required ();
1308 targetm
.asm_out
.internal_label (asm_out_file
, "LBB", n
);
1311 /* Describe the end line-number of an internal block within a function. */
1314 dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED
, unsigned int n
)
1316 emit_pending_bincls_if_required ();
1317 targetm
.asm_out
.internal_label (asm_out_file
, "LBE", n
);
1320 /* Output dbx data for a function definition.
1321 This includes a definition of the function name itself (a symbol),
1322 definitions of the parameters (locating them in the parameter list)
1323 and then output the block that makes up the function's body
1324 (including all the auto variables of the function). */
1327 dbxout_function_decl (tree decl
)
1329 emit_pending_bincls_if_required ();
1330 #ifndef DBX_FUNCTION_FIRST
1331 dbxout_begin_function (decl
);
1333 dbxout_block (DECL_INITIAL (decl
), 0, DECL_ARGUMENTS (decl
));
1334 dbxout_function_end (decl
);
1337 #endif /* DBX_DEBUGGING_INFO */
1339 /* Debug information for a global DECL. Called from toplev.c after
1340 compilation proper has finished. */
1342 dbxout_global_decl (tree decl
)
1344 if (TREE_CODE (decl
) == VAR_DECL
&& !DECL_EXTERNAL (decl
))
1346 int saved_tree_used
= TREE_USED (decl
);
1347 TREE_USED (decl
) = 1;
1348 dbxout_symbol (decl
, 0);
1349 TREE_USED (decl
) = saved_tree_used
;
1353 /* This is just a function-type adapter; dbxout_symbol does exactly
1354 what we want but returns an int. */
1356 dbxout_type_decl (tree decl
, int local
)
1358 dbxout_symbol (decl
, local
);
1361 /* At the end of compilation, finish writing the symbol table.
1362 The default is to call debug_free_queue but do nothing else. */
1365 dbxout_finish (const char *filename ATTRIBUTE_UNUSED
)
1367 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
1368 DBX_OUTPUT_MAIN_SOURCE_FILE_END (asm_out_file
, filename
);
1369 #elif defined DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
1371 switch_to_section (text_section
);
1372 dbxout_begin_empty_stabs (N_SO
);
1373 dbxout_stab_value_internal_label ("Letext", 0);
1376 debug_free_queue ();
1379 /* Output the index of a type. */
1382 dbxout_type_index (tree type
)
1384 #ifndef DBX_USE_BINCL
1385 stabstr_D (TYPE_SYMTAB_ADDRESS (type
));
1387 struct typeinfo
*t
= &typevec
[TYPE_SYMTAB_ADDRESS (type
)];
1389 stabstr_D (t
->file_number
);
1391 stabstr_D (t
->type_number
);
1397 /* Generate the symbols for any queued up type symbols we encountered
1398 while generating the type info for some originally used symbol.
1399 This might generate additional entries in the queue. Only when
1400 the nesting depth goes to 0 is this routine called. */
1403 debug_flush_symbol_queue (void)
1407 /* Make sure that additionally queued items are not flushed
1412 for (i
= 0; i
< symbol_queue_index
; ++i
)
1414 /* If we pushed queued symbols then such symbols must be
1415 output no matter what anyone else says. Specifically,
1416 we need to make sure dbxout_symbol() thinks the symbol was
1417 used and also we need to override TYPE_DECL_SUPPRESS_DEBUG
1418 which may be set for outside reasons. */
1419 int saved_tree_used
= TREE_USED (symbol_queue
[i
]);
1420 int saved_suppress_debug
= TYPE_DECL_SUPPRESS_DEBUG (symbol_queue
[i
]);
1421 TREE_USED (symbol_queue
[i
]) = 1;
1422 TYPE_DECL_SUPPRESS_DEBUG (symbol_queue
[i
]) = 0;
1424 #ifdef DBX_DEBUGGING_INFO
1425 dbxout_symbol (symbol_queue
[i
], 0);
1428 TREE_USED (symbol_queue
[i
]) = saved_tree_used
;
1429 TYPE_DECL_SUPPRESS_DEBUG (symbol_queue
[i
]) = saved_suppress_debug
;
1432 symbol_queue_index
= 0;
1436 /* Queue a type symbol needed as part of the definition of a decl
1437 symbol. These symbols are generated when debug_flush_symbol_queue()
1441 debug_queue_symbol (tree decl
)
1443 if (symbol_queue_index
>= symbol_queue_size
)
1445 symbol_queue_size
+= 10;
1446 symbol_queue
= XRESIZEVEC (tree
, symbol_queue
, symbol_queue_size
);
1449 symbol_queue
[symbol_queue_index
++] = decl
;
1452 /* Free symbol queue. */
1454 debug_free_queue (void)
1458 free (symbol_queue
);
1459 symbol_queue
= NULL
;
1460 symbol_queue_size
= 0;
1464 /* Used in several places: evaluates to '0' for a private decl,
1465 '1' for a protected decl, '2' for a public decl. */
1466 #define DECL_ACCESSIBILITY_CHAR(DECL) \
1467 (TREE_PRIVATE (DECL) ? '0' : TREE_PROTECTED (DECL) ? '1' : '2')
1469 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
1470 This must be a separate function because anonymous unions require
1474 dbxout_type_fields (tree type
)
1478 /* Output the name, type, position (in bits), size (in bits) of each
1479 field that we can support. */
1480 for (tem
= TYPE_FIELDS (type
); tem
; tem
= DECL_CHAIN (tem
))
1482 /* If one of the nodes is an error_mark or its type is then
1484 if (error_operand_p (tem
))
1487 /* Omit here local type decls until we know how to support them. */
1488 if (TREE_CODE (tem
) == TYPE_DECL
1489 /* Omit here the nameless fields that are used to skip bits. */
1490 || DECL_IGNORED_P (tem
)
1491 /* Omit fields whose position or size are variable or too large to
1493 || (TREE_CODE (tem
) == FIELD_DECL
1494 && (! tree_fits_shwi_p (bit_position (tem
))
1495 || ! DECL_SIZE (tem
)
1496 || ! tree_fits_uhwi_p (DECL_SIZE (tem
)))))
1499 else if (TREE_CODE (tem
) != CONST_DECL
)
1501 /* Continue the line if necessary,
1502 but not before the first field. */
1503 if (tem
!= TYPE_FIELDS (type
))
1506 if (DECL_NAME (tem
))
1507 stabstr_I (DECL_NAME (tem
));
1510 if (use_gnu_debug_info_extensions
1511 && (TREE_PRIVATE (tem
) || TREE_PROTECTED (tem
)
1512 || TREE_CODE (tem
) != FIELD_DECL
))
1515 stabstr_C (DECL_ACCESSIBILITY_CHAR (tem
));
1518 dbxout_type ((TREE_CODE (tem
) == FIELD_DECL
1519 && DECL_BIT_FIELD_TYPE (tem
))
1520 ? DECL_BIT_FIELD_TYPE (tem
) : TREE_TYPE (tem
), 0);
1522 if (TREE_CODE (tem
) == VAR_DECL
)
1524 if (TREE_STATIC (tem
) && use_gnu_debug_info_extensions
)
1526 tree name
= DECL_ASSEMBLER_NAME (tem
);
1533 /* If TEM is non-static, GDB won't understand it. */
1534 stabstr_S (",0,0;");
1539 stabstr_D (int_bit_position (tem
));
1541 stabstr_D (tree_to_uhwi (DECL_SIZE (tem
)));
1548 /* Subroutine of `dbxout_type_methods'. Output debug info about the
1549 method described DECL. */
1552 dbxout_type_method_1 (tree decl
)
1556 if (TREE_CODE (TREE_TYPE (decl
)) == FUNCTION_TYPE
)
1558 else /* it's a METHOD_TYPE. */
1560 tree firstarg
= TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)));
1561 /* A for normal functions.
1562 B for `const' member functions.
1563 C for `volatile' member functions.
1564 D for `const volatile' member functions. */
1565 if (TYPE_READONLY (TREE_TYPE (firstarg
)))
1567 if (TYPE_VOLATILE (TREE_TYPE (firstarg
)))
1570 if (DECL_VINDEX (decl
))
1576 /* ??? Output the mangled name, which contains an encoding of the
1577 method's type signature. May not be necessary anymore. */
1579 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
1581 stabstr_C (DECL_ACCESSIBILITY_CHAR (decl
));
1585 if (DECL_VINDEX (decl
) && tree_fits_shwi_p (DECL_VINDEX (decl
)))
1587 stabstr_D (tree_to_shwi (DECL_VINDEX (decl
)));
1589 dbxout_type (DECL_CONTEXT (decl
), 0);
1594 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
1598 dbxout_type_methods (tree type
)
1600 /* C++: put out the method names and their parameter lists */
1601 tree methods
= TYPE_METHODS (type
);
1605 if (methods
== NULL_TREE
)
1608 if (TREE_CODE (methods
) != TREE_VEC
)
1610 else if (TREE_VEC_ELT (methods
, 0) != NULL_TREE
)
1611 fndecl
= TREE_VEC_ELT (methods
, 0);
1613 fndecl
= TREE_VEC_ELT (methods
, 1);
1617 int need_prefix
= 1;
1619 /* Group together all the methods for the same operation.
1620 These differ in the types of the arguments. */
1621 for (last
= NULL_TREE
;
1622 fndecl
&& (last
== NULL_TREE
|| DECL_NAME (fndecl
) == DECL_NAME (last
));
1623 fndecl
= DECL_CHAIN (fndecl
))
1624 /* Output the name of the field (after overloading), as
1625 well as the name of the field before overloading, along
1626 with its parameter list */
1628 /* Skip methods that aren't FUNCTION_DECLs. (In C++, these
1629 include TEMPLATE_DECLs.) The debugger doesn't know what
1630 to do with such entities anyhow. */
1631 if (TREE_CODE (fndecl
) != FUNCTION_DECL
)
1638 /* Also ignore abstract methods; those are only interesting to
1639 the DWARF backends. */
1640 if (DECL_IGNORED_P (fndecl
) || DECL_ABSTRACT_P (fndecl
))
1643 /* Redundantly output the plain name, since that's what gdb
1647 stabstr_I (DECL_NAME (fndecl
));
1652 dbxout_type (TREE_TYPE (fndecl
), 0);
1653 dbxout_type_method_1 (fndecl
);
1660 /* Emit a "range" type specification, which has the form:
1661 "r<index type>;<lower bound>;<upper bound>;".
1662 TYPE is an INTEGER_TYPE, LOW and HIGH are the bounds. */
1665 dbxout_range_type (tree type
, tree low
, tree high
)
1668 if (TREE_TYPE (type
))
1669 dbxout_type (TREE_TYPE (type
), 0);
1670 else if (TREE_CODE (type
) != INTEGER_TYPE
)
1671 dbxout_type (type
, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
1674 /* Traditionally, we made sure 'int' was type 1, and builtin types
1675 were defined to be sub-ranges of int. Unfortunately, this
1676 does not allow us to distinguish true sub-ranges from integer
1677 types. So, instead we define integer (non-sub-range) types as
1678 sub-ranges of themselves. This matters for Chill. If this isn't
1679 a subrange type, then we want to define it in terms of itself.
1680 However, in C, this may be an anonymous integer type, and we don't
1681 want to emit debug info referring to it. Just calling
1682 dbxout_type_index won't work anyways, because the type hasn't been
1683 defined yet. We make this work for both cases by checked to see
1684 whether this is a defined type, referring to it if it is, and using
1686 if (TYPE_SYMTAB_ADDRESS (type
) != 0)
1687 dbxout_type_index (type
);
1689 dbxout_type_index (integer_type_node
);
1693 if (low
&& tree_fits_shwi_p (low
))
1695 if (print_int_cst_bounds_in_octal_p (type
, low
, high
))
1698 stabstr_D (tree_to_shwi (low
));
1704 if (high
&& tree_fits_shwi_p (high
))
1706 if (print_int_cst_bounds_in_octal_p (type
, low
, high
))
1709 stabstr_D (tree_to_shwi (high
));
1717 /* Output a reference to a type. If the type has not yet been
1718 described in the dbx output, output its definition now.
1719 For a type already defined, just refer to its definition
1720 using the type number.
1722 If FULL is nonzero, and the type has been described only with
1723 a forward-reference, output the definition now.
1724 If FULL is zero in this case, just refer to the forward-reference
1725 using the number previously allocated. */
1728 dbxout_type (tree type
, int full
)
1730 static int anonymous_type_number
= 0;
1731 tree tem
, main_variant
, low
, high
;
1733 if (TREE_CODE (type
) == INTEGER_TYPE
)
1735 if (TREE_TYPE (type
) == 0)
1737 low
= TYPE_MIN_VALUE (type
);
1738 high
= TYPE_MAX_VALUE (type
);
1741 else if (subrange_type_for_debug_p (type
, &low
, &high
))
1744 /* If this is a subtype that should not be emitted as a subrange type,
1745 use the base type. */
1748 type
= TREE_TYPE (type
);
1749 low
= TYPE_MIN_VALUE (type
);
1750 high
= TYPE_MAX_VALUE (type
);
1754 /* If there was an input error and we don't really have a type,
1755 avoid crashing and write something that is at least valid
1756 by assuming `int'. */
1757 if (type
== error_mark_node
)
1758 type
= integer_type_node
;
1761 if (TYPE_NAME (type
)
1762 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1763 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type
)))
1767 /* Try to find the "main variant" with the same name. */
1768 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1769 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
1770 main_variant
= TREE_TYPE (TYPE_NAME (type
));
1772 main_variant
= TYPE_MAIN_VARIANT (type
);
1774 /* If we are not using extensions, stabs does not distinguish const and
1775 volatile, so there is no need to make them separate types. */
1776 if (!use_gnu_debug_info_extensions
)
1777 type
= main_variant
;
1779 if (TYPE_SYMTAB_ADDRESS (type
) == 0)
1781 /* Type has no dbx number assigned. Assign next available number. */
1782 TYPE_SYMTAB_ADDRESS (type
) = next_type_number
++;
1784 /* Make sure type vector is long enough to record about this type. */
1786 if (next_type_number
== typevec_len
)
1788 typevec
= GGC_RESIZEVEC (struct typeinfo
, typevec
, typevec_len
* 2);
1789 memset (typevec
+ typevec_len
, 0, typevec_len
* sizeof typevec
[0]);
1793 #ifdef DBX_USE_BINCL
1794 emit_pending_bincls_if_required ();
1795 typevec
[TYPE_SYMTAB_ADDRESS (type
)].file_number
1796 = current_file
->file_number
;
1797 typevec
[TYPE_SYMTAB_ADDRESS (type
)].type_number
1798 = current_file
->next_type_number
++;
1802 if (flag_debug_only_used_symbols
)
1804 if ((TREE_CODE (type
) == RECORD_TYPE
1805 || TREE_CODE (type
) == UNION_TYPE
1806 || TREE_CODE (type
) == QUAL_UNION_TYPE
1807 || TREE_CODE (type
) == ENUMERAL_TYPE
)
1808 && TYPE_STUB_DECL (type
)
1809 && DECL_P (TYPE_STUB_DECL (type
))
1810 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type
)))
1811 debug_queue_symbol (TYPE_STUB_DECL (type
));
1812 else if (TYPE_NAME (type
)
1813 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
)
1814 debug_queue_symbol (TYPE_NAME (type
));
1817 /* Output the number of this type, to refer to it. */
1818 dbxout_type_index (type
);
1820 #ifdef DBX_TYPE_DEFINED
1821 if (DBX_TYPE_DEFINED (type
))
1825 /* If this type's definition has been output or is now being output,
1828 switch (typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
)
1833 /* If we have already had a cross reference,
1834 and either that's all we want or that's the best we could do,
1835 don't repeat the cross reference.
1836 Sun dbx crashes if we do. */
1837 if (! full
|| !COMPLETE_TYPE_P (type
)
1838 /* No way in DBX fmt to describe a variable size. */
1839 || ! tree_fits_uhwi_p (TYPE_SIZE (type
)))
1847 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1848 leave the type-number completely undefined rather than output
1849 a cross-reference. If we have already used GNU debug info extensions,
1850 then it is OK to output a cross reference. This is necessary to get
1851 proper C++ debug output. */
1852 if ((TREE_CODE (type
) == RECORD_TYPE
|| TREE_CODE (type
) == UNION_TYPE
1853 || TREE_CODE (type
) == QUAL_UNION_TYPE
1854 || TREE_CODE (type
) == ENUMERAL_TYPE
)
1855 && ! use_gnu_debug_info_extensions
)
1856 /* We must use the same test here as we use twice below when deciding
1857 whether to emit a cross-reference. */
1858 if ((TYPE_NAME (type
) != 0
1859 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
1860 && DECL_IGNORED_P (TYPE_NAME (type
)))
1862 || !COMPLETE_TYPE_P (type
)
1863 /* No way in DBX fmt to describe a variable size. */
1864 || ! tree_fits_uhwi_p (TYPE_SIZE (type
)))
1866 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
1871 /* Output a definition now. */
1874 /* Mark it as defined, so that if it is self-referent
1875 we will not get into an infinite recursion of definitions. */
1877 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_DEFINED
;
1879 /* If this type is a variant of some other, hand off. Types with
1880 different names are usefully distinguished. We only distinguish
1881 cv-qualified types if we're using extensions. */
1882 if (TYPE_READONLY (type
) > TYPE_READONLY (main_variant
))
1885 dbxout_type (build_type_variant (type
, 0, TYPE_VOLATILE (type
)), 0);
1888 else if (TYPE_VOLATILE (type
) > TYPE_VOLATILE (main_variant
))
1891 dbxout_type (build_type_variant (type
, TYPE_READONLY (type
), 0), 0);
1894 else if (main_variant
!= TYPE_MAIN_VARIANT (type
))
1896 if (flag_debug_only_used_symbols
)
1898 tree orig_type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
1900 if ((TREE_CODE (orig_type
) == RECORD_TYPE
1901 || TREE_CODE (orig_type
) == UNION_TYPE
1902 || TREE_CODE (orig_type
) == QUAL_UNION_TYPE
1903 || TREE_CODE (orig_type
) == ENUMERAL_TYPE
)
1904 && TYPE_STUB_DECL (orig_type
)
1905 && ! DECL_IGNORED_P (TYPE_STUB_DECL (orig_type
)))
1906 debug_queue_symbol (TYPE_STUB_DECL (orig_type
));
1908 /* 'type' is a typedef; output the type it refers to. */
1909 dbxout_type (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)), 0);
1912 /* else continue. */
1914 switch (TREE_CODE (type
))
1919 /* For a void type, just define it as itself; i.e., "5=5".
1920 This makes us consider it defined
1921 without saying what it is. The debugger will make it
1922 a void type when the reference is seen, and nothing will
1923 ever override that default. */
1924 dbxout_type_index (type
);
1928 if (type
== char_type_node
&& ! TYPE_UNSIGNED (type
))
1930 /* Output the type `char' as a subrange of itself!
1931 I don't understand this definition, just copied it
1932 from the output of pcc.
1933 This used to use `r2' explicitly and we used to
1934 take care to make sure that `char' was type number 2. */
1936 dbxout_type_index (type
);
1937 stabstr_S (";0;127;");
1940 /* If this is a subtype of another integer type, always prefer to
1941 write it as a subtype. */
1942 else if (TREE_TYPE (type
) != 0
1943 && TREE_CODE (TREE_TYPE (type
)) == INTEGER_TYPE
)
1945 /* If the size is non-standard, say what it is if we can use
1948 if (use_gnu_debug_info_extensions
1949 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1952 stabstr_D (TYPE_PRECISION (type
));
1956 dbxout_range_type (type
, low
, high
);
1961 /* If the size is non-standard, say what it is if we can use
1964 if (use_gnu_debug_info_extensions
1965 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
1968 stabstr_D (TYPE_PRECISION (type
));
1972 if (print_int_cst_bounds_in_octal_p (type
, low
, high
))
1976 /* If this type derives from another type, output type index of
1977 parent type. This is particularly important when parent type
1978 is an enumerated type, because not generating the parent type
1979 index would transform the definition of this enumerated type
1980 into a plain unsigned type. */
1981 if (TREE_TYPE (type
) != 0)
1982 dbxout_type_index (TREE_TYPE (type
));
1984 dbxout_type_index (type
);
1994 /* Output other integer types as subranges of `int'. */
1995 dbxout_range_type (type
, low
, high
);
2001 case FIXED_POINT_TYPE
:
2002 /* This used to say `r1' and we used to take care
2003 to make sure that `int' was type number 1. */
2005 dbxout_type_index (integer_type_node
);
2007 stabstr_D (int_size_in_bytes (type
));
2012 if (use_gnu_debug_info_extensions
)
2015 stabstr_D (BITS_PER_UNIT
* int_size_in_bytes (type
));
2016 stabstr_S (";-16;");
2018 else /* Define as enumeral type (False, True) */
2019 stabstr_S ("eFalse:0,True:1,;");
2023 /* Differs from the REAL_TYPE by its new data type number.
2024 R3 is NF_COMPLEX. We don't try to use any of the other NF_*
2025 codes since gdb doesn't care anyway. */
2027 if (TREE_CODE (TREE_TYPE (type
)) == REAL_TYPE
)
2030 stabstr_D (2 * int_size_in_bytes (TREE_TYPE (type
)));
2035 /* Output a complex integer type as a structure,
2036 pending some other way to do it. */
2038 stabstr_D (int_size_in_bytes (type
));
2040 stabstr_S ("real:");
2041 dbxout_type (TREE_TYPE (type
), 0);
2043 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
2045 stabstr_S (";imag:");
2046 dbxout_type (TREE_TYPE (type
), 0);
2048 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
2050 stabstr_D (TYPE_PRECISION (TREE_TYPE (type
)));
2056 /* Make arrays of packed bits look like bitstrings for chill. */
2057 if (TYPE_PACKED (type
) && use_gnu_debug_info_extensions
)
2060 stabstr_D (BITS_PER_UNIT
* int_size_in_bytes (type
));
2061 stabstr_S (";@S;S");
2062 dbxout_type (TYPE_DOMAIN (type
), 0);
2066 /* Output "a" followed by a range type definition
2067 for the index type of the array
2068 followed by a reference to the target-type.
2069 ar1;0;N;M for a C array of type M and size N+1. */
2070 /* Check if a character string type, which in Chill is
2071 different from an array of characters. */
2072 if (TYPE_STRING_FLAG (type
) && use_gnu_debug_info_extensions
)
2076 tem
= TYPE_DOMAIN (type
);
2080 dbxout_type_index (integer_type_node
);
2081 stabstr_S (";0;-1;");
2086 dbxout_range_type (tem
, TYPE_MIN_VALUE (tem
), TYPE_MAX_VALUE (tem
));
2089 dbxout_type (TREE_TYPE (type
), 0);
2093 /* Make vectors look like an array. */
2094 if (use_gnu_debug_info_extensions
)
2097 /* Output "a" followed by a range type definition
2098 for the index type of the array
2099 followed by a reference to the target-type.
2100 ar1;0;N;M for a C array of type M and size N+1. */
2102 dbxout_range_type (integer_type_node
, size_zero_node
,
2103 size_int (TYPE_VECTOR_SUBPARTS (type
) - 1));
2105 dbxout_type (TREE_TYPE (type
), 0);
2110 case QUAL_UNION_TYPE
:
2112 tree binfo
= TYPE_BINFO (type
);
2114 /* Output a structure type. We must use the same test here as we
2115 use in the DBX_NO_XREFS case above. */
2116 if ((TYPE_NAME (type
) != 0
2117 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
2118 && DECL_IGNORED_P (TYPE_NAME (type
)))
2120 || !COMPLETE_TYPE_P (type
)
2121 /* No way in DBX fmt to describe a variable size. */
2122 || ! tree_fits_uhwi_p (TYPE_SIZE (type
)))
2124 /* If the type is just a cross reference, output one
2125 and mark the type as partially described.
2126 If it later becomes defined, we will output
2127 its real definition.
2128 If the type has a name, don't nest its definition within
2129 another type's definition; instead, output an xref
2130 and let the definition come when the name is defined. */
2131 stabstr_S ((TREE_CODE (type
) == RECORD_TYPE
) ? "xs" : "xu");
2132 if (TYPE_IDENTIFIER (type
))
2134 /* Note that the C frontend creates for anonymous variable
2135 length records/unions TYPE_NAME with DECL_NAME NULL. */
2136 dbxout_type_name (type
);
2141 stabstr_D (anonymous_type_number
++);
2145 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
2149 /* Identify record or union, and print its size. */
2150 stabstr_C ((TREE_CODE (type
) == RECORD_TYPE
) ? 's' : 'u');
2151 stabstr_D (int_size_in_bytes (type
));
2157 vec
<tree
, va_gc
> *accesses
= BINFO_BASE_ACCESSES (binfo
);
2159 if (use_gnu_debug_info_extensions
)
2161 if (BINFO_N_BASE_BINFOS (binfo
))
2164 stabstr_U (BINFO_N_BASE_BINFOS (binfo
));
2168 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, child
); i
++)
2170 tree access
= (accesses
? (*accesses
)[i
] : access_public_node
);
2172 if (use_gnu_debug_info_extensions
)
2174 stabstr_C (BINFO_VIRTUAL_P (child
) ? '1' : '0');
2175 stabstr_C (access
== access_public_node
? '2' :
2176 access
== access_protected_node
2178 if (BINFO_VIRTUAL_P (child
)
2180 || strcmp (lang_hooks
.name
, "GNU Objective-C++") == 0))
2181 /* For a virtual base, print the (negative)
2182 offset within the vtable where we must look
2183 to find the necessary adjustment. */
2185 (tree_to_shwi (BINFO_VPTR_FIELD (child
))
2188 stabstr_D (tree_to_shwi (BINFO_OFFSET (child
))
2191 dbxout_type (BINFO_TYPE (child
), 0);
2196 /* Print out the base class information with
2197 fields which have the same names at the types
2199 dbxout_type_name (BINFO_TYPE (child
));
2201 dbxout_type (BINFO_TYPE (child
), full
);
2203 stabstr_D (tree_to_shwi (BINFO_OFFSET (child
))
2207 (tree_to_shwi (TYPE_SIZE (BINFO_TYPE (child
)))
2215 /* Write out the field declarations. */
2216 dbxout_type_fields (type
);
2217 if (use_gnu_debug_info_extensions
&& TYPE_METHODS (type
) != NULL_TREE
)
2219 dbxout_type_methods (type
);
2224 if (use_gnu_debug_info_extensions
&& TREE_CODE (type
) == RECORD_TYPE
2225 /* Avoid the ~ if we don't really need it--it confuses dbx. */
2226 && TYPE_VFIELD (type
))
2229 /* We need to write out info about what field this class
2230 uses as its "main" vtable pointer field, because if this
2231 field is inherited from a base class, GDB cannot necessarily
2232 figure out which field it's using in time. */
2234 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type
)), 0);
2240 /* We must use the same test here as we use in the DBX_NO_XREFS case
2241 above. We simplify it a bit since an enum will never have a variable
2243 if ((TYPE_NAME (type
) != 0
2244 && ! (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
2245 && DECL_IGNORED_P (TYPE_NAME (type
)))
2247 || !COMPLETE_TYPE_P (type
))
2250 dbxout_type_name (type
);
2251 typevec
[TYPE_SYMTAB_ADDRESS (type
)].status
= TYPE_XREF
;
2255 if (use_gnu_debug_info_extensions
2256 && TYPE_PRECISION (type
) != TYPE_PRECISION (integer_type_node
))
2259 stabstr_D (TYPE_PRECISION (type
));
2264 for (tem
= TYPE_VALUES (type
); tem
; tem
= TREE_CHAIN (tem
))
2266 tree value
= TREE_VALUE (tem
);
2268 stabstr_I (TREE_PURPOSE (tem
));
2271 if (TREE_CODE (value
) == CONST_DECL
)
2272 value
= DECL_INITIAL (value
);
2274 if (cst_and_fits_in_hwi (value
))
2275 stabstr_D (TREE_INT_CST_LOW (value
));
2280 if (TREE_CHAIN (tem
) != 0)
2289 dbxout_type (TREE_TYPE (type
), 0);
2293 if (use_gnu_debug_info_extensions
)
2297 /* Write the argument types out longhand. */
2298 dbxout_type (TYPE_METHOD_BASETYPE (type
), 0);
2300 dbxout_type (TREE_TYPE (type
), 0);
2301 dbxout_args (TYPE_ARG_TYPES (type
));
2305 /* Treat it as a function type. */
2306 dbxout_type (TREE_TYPE (type
), 0);
2310 if (use_gnu_debug_info_extensions
)
2313 dbxout_type (TYPE_OFFSET_BASETYPE (type
), 0);
2315 dbxout_type (TREE_TYPE (type
), 0);
2318 /* Should print as an int, because it is really just an offset. */
2319 dbxout_type (integer_type_node
, 0);
2322 case REFERENCE_TYPE
:
2323 if (use_gnu_debug_info_extensions
)
2329 dbxout_type (TREE_TYPE (type
), 0);
2334 dbxout_type (TREE_TYPE (type
), 0);
2337 case POINTER_BOUNDS_TYPE
:
2338 /* No debug info for pointer bounds type supported yet. */
2342 /* A C++ function with deduced return type can have a TEMPLATE_TYPE_PARM
2343 named 'auto' in its type.
2344 No debug info for TEMPLATE_TYPE_PARM type supported yet. */
2345 if (lang_GNU_CXX ())
2347 tree name
= TYPE_IDENTIFIER (type
);
2348 if (name
== get_identifier ("auto")
2349 || name
== get_identifier ("decltype(auto)"))
2357 /* Return nonzero if the given type represents an integer whose bounds
2358 should be printed in octal format. */
2361 print_int_cst_bounds_in_octal_p (tree type
, tree low
, tree high
)
2363 /* If we can use GDB extensions and the size is wider than a long
2364 (the size used by GDB to read them) or we may have trouble writing
2365 the bounds the usual way, write them in octal. Note the test is for
2366 the *target's* size of "long", not that of the host. The host test
2367 is just to make sure we can write it out in case the host wide int
2368 is narrower than the target "long".
2370 For unsigned types, we use octal if they are the same size or larger.
2371 This is because we print the bounds as signed decimal, and hence they
2372 can't span same size unsigned types. */
2374 if (use_gnu_debug_info_extensions
2375 && low
&& TREE_CODE (low
) == INTEGER_CST
2376 && high
&& TREE_CODE (high
) == INTEGER_CST
2377 && (TYPE_PRECISION (type
) > TYPE_PRECISION (integer_type_node
)
2378 || ((TYPE_PRECISION (type
) == TYPE_PRECISION (integer_type_node
))
2379 && TYPE_UNSIGNED (type
))
2380 || TYPE_PRECISION (type
) > HOST_BITS_PER_WIDE_INT
2381 || (TYPE_PRECISION (type
) == HOST_BITS_PER_WIDE_INT
2382 && TYPE_UNSIGNED (type
))))
2388 /* Output the name of type TYPE, with no punctuation.
2389 Such names can be set up either by typedef declarations
2390 or by struct, enum and union tags. */
2393 dbxout_type_name (tree type
)
2395 tree t
= TYPE_NAME (type
);
2398 switch (TREE_CODE (t
))
2400 case IDENTIFIER_NODE
:
2412 /* Output leading leading struct or class names needed for qualifying
2413 type whose scope is limited to a struct or class. */
2416 dbxout_class_name_qualifiers (tree decl
)
2418 tree context
= decl_type_context (decl
);
2420 if (context
!= NULL_TREE
2421 && TREE_CODE (context
) == RECORD_TYPE
2422 && TYPE_NAME (context
) != 0
2423 && (TREE_CODE (TYPE_NAME (context
)) == IDENTIFIER_NODE
2424 || (DECL_NAME (TYPE_NAME (context
)) != 0)))
2426 tree name
= TYPE_NAME (context
);
2428 if (TREE_CODE (name
) == TYPE_DECL
)
2430 dbxout_class_name_qualifiers (name
);
2431 name
= DECL_NAME (name
);
2438 /* This is a specialized subset of expand_expr for use by dbxout_symbol in
2439 evaluating DECL_VALUE_EXPR. In particular, we stop if we find decls that
2440 haven't been expanded, or if the expression is getting so complex we won't
2441 be able to represent it in stabs anyway. Returns NULL on failure. */
2444 dbxout_expand_expr (tree expr
)
2446 switch (TREE_CODE (expr
))
2449 /* We can't handle emulated tls variables, because the address is an
2450 offset to the return value of __emutls_get_address, and there is no
2451 way to express that in stabs. Also, there are name mangling issues
2452 here. We end up with references to undefined symbols if we don't
2453 disable debug info for these variables. */
2454 if (!targetm
.have_tls
&& DECL_THREAD_LOCAL_P (expr
))
2456 if (TREE_STATIC (expr
)
2457 && !TREE_ASM_WRITTEN (expr
)
2458 && !DECL_HAS_VALUE_EXPR_P (expr
)
2459 && !TREE_PUBLIC (expr
)
2460 && DECL_RTL_SET_P (expr
)
2461 && MEM_P (DECL_RTL (expr
)))
2463 /* If this is a var that might not be actually output,
2464 return NULL, otherwise stabs might reference an undefined
2466 varpool_node
*node
= varpool_node::get (expr
);
2467 if (!node
|| !node
->definition
)
2474 if (DECL_HAS_VALUE_EXPR_P (expr
))
2475 return dbxout_expand_expr (DECL_VALUE_EXPR (expr
));
2479 return DECL_RTL_IF_SET (expr
);
2482 return expand_expr (expr
, NULL_RTX
, VOIDmode
, EXPAND_INITIALIZER
);
2486 case ARRAY_RANGE_REF
:
2490 HOST_WIDE_INT bitsize
, bitpos
;
2492 int volatilep
= 0, unsignedp
= 0;
2495 tem
= get_inner_reference (expr
, &bitsize
, &bitpos
, &offset
,
2496 &mode
, &unsignedp
, &volatilep
, true);
2498 x
= dbxout_expand_expr (tem
);
2499 if (x
== NULL
|| !MEM_P (x
))
2503 if (!tree_fits_shwi_p (offset
))
2505 x
= adjust_address_nv (x
, mode
, tree_to_shwi (offset
));
2508 x
= adjust_address_nv (x
, mode
, bitpos
/ BITS_PER_UNIT
);
2518 /* Helper function for output_used_types. Queue one entry from the
2519 used types hash to be output. */
2522 output_used_types_helper (tree
const &type
, vec
<tree
> *types_p
)
2524 if ((TREE_CODE (type
) == RECORD_TYPE
2525 || TREE_CODE (type
) == UNION_TYPE
2526 || TREE_CODE (type
) == QUAL_UNION_TYPE
2527 || TREE_CODE (type
) == ENUMERAL_TYPE
)
2528 && TYPE_STUB_DECL (type
)
2529 && DECL_P (TYPE_STUB_DECL (type
))
2530 && ! DECL_IGNORED_P (TYPE_STUB_DECL (type
)))
2531 types_p
->quick_push (TYPE_STUB_DECL (type
));
2532 else if (TYPE_NAME (type
)
2533 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
)
2534 types_p
->quick_push (TYPE_NAME (type
));
2539 /* This is a qsort callback which sorts types and declarations into a
2540 predictable order (types, then declarations, sorted by UID
2544 output_types_sort (const void *pa
, const void *pb
)
2546 const tree lhs
= *((const tree
*)pa
);
2547 const tree rhs
= *((const tree
*)pb
);
2552 return TYPE_UID (lhs
) - TYPE_UID (rhs
);
2561 return DECL_UID (lhs
) - DECL_UID (rhs
);
2566 /* Force all types used by this function to be output in debug
2570 output_used_types (void)
2572 if (cfun
&& cfun
->used_types_hash
)
2578 types
.create (cfun
->used_types_hash
->elements ());
2579 cfun
->used_types_hash
->traverse
<vec
<tree
> *, output_used_types_helper
>
2582 /* Sort by UID to prevent dependence on hash table ordering. */
2583 types
.qsort (output_types_sort
);
2585 FOR_EACH_VEC_ELT (types
, i
, type
)
2586 debug_queue_symbol (type
);
2592 /* Output a .stabs for the symbol defined by DECL,
2593 which must be a ..._DECL node in the normal namespace.
2594 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
2595 LOCAL is nonzero if the scope is less than the entire file.
2596 Return 1 if a stabs might have been emitted. */
2599 dbxout_symbol (tree decl
, int local ATTRIBUTE_UNUSED
)
2601 tree type
= TREE_TYPE (decl
);
2602 tree context
= NULL_TREE
;
2606 /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */
2609 /* Ignore nameless syms, but don't ignore type tags. */
2611 if ((DECL_NAME (decl
) == 0 && TREE_CODE (decl
) != TYPE_DECL
)
2612 || DECL_IGNORED_P (decl
))
2613 DBXOUT_DECR_NESTING_AND_RETURN (0);
2615 /* If we are to generate only the symbols actually used then such
2616 symbol nodes are flagged with TREE_USED. Ignore any that
2617 aren't flagged as TREE_USED. */
2619 if (flag_debug_only_used_symbols
2620 && (!TREE_USED (decl
)
2621 && (TREE_CODE (decl
) != VAR_DECL
|| !DECL_INITIAL (decl
))))
2622 DBXOUT_DECR_NESTING_AND_RETURN (0);
2624 /* If dbxout_init has not yet run, queue this symbol for later. */
2627 preinit_symbols
= tree_cons (0, decl
, preinit_symbols
);
2628 DBXOUT_DECR_NESTING_AND_RETURN (0);
2631 if (flag_debug_only_used_symbols
)
2635 /* We now have a used symbol. We need to generate the info for
2636 the symbol's type in addition to the symbol itself. These
2637 type symbols are queued to be generated after were done with
2638 the symbol itself (otherwise they would fight over the
2641 Note, because the TREE_TYPE(type) might be something like a
2642 pointer to a named type we need to look for the first name
2643 we see following the TREE_TYPE chain. */
2646 while (POINTER_TYPE_P (t
))
2649 /* RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, and ENUMERAL_TYPE
2650 need special treatment. The TYPE_STUB_DECL field in these
2651 types generally represents the tag name type we want to
2652 output. In addition there could be a typedef type with
2653 a different name. In that case we also want to output
2656 if (TREE_CODE (t
) == RECORD_TYPE
2657 || TREE_CODE (t
) == UNION_TYPE
2658 || TREE_CODE (t
) == QUAL_UNION_TYPE
2659 || TREE_CODE (t
) == ENUMERAL_TYPE
)
2661 if (TYPE_STUB_DECL (t
)
2662 && TYPE_STUB_DECL (t
) != decl
2663 && DECL_P (TYPE_STUB_DECL (t
))
2664 && ! DECL_IGNORED_P (TYPE_STUB_DECL (t
)))
2666 debug_queue_symbol (TYPE_STUB_DECL (t
));
2668 && TYPE_NAME (t
) != TYPE_STUB_DECL (t
)
2669 && TYPE_NAME (t
) != decl
2670 && DECL_P (TYPE_NAME (t
)))
2671 debug_queue_symbol (TYPE_NAME (t
));
2674 else if (TYPE_NAME (t
)
2675 && TYPE_NAME (t
) != decl
2676 && DECL_P (TYPE_NAME (t
)))
2677 debug_queue_symbol (TYPE_NAME (t
));
2680 emit_pending_bincls_if_required ();
2682 switch (TREE_CODE (decl
))
2685 /* Enum values are defined by defining the enum type. */
2689 decl_rtl
= DECL_RTL_IF_SET (decl
);
2691 DBXOUT_DECR_NESTING_AND_RETURN (0);
2692 if (DECL_EXTERNAL (decl
))
2694 /* Don't mention a nested function under its parent. */
2695 context
= decl_function_context (decl
);
2696 if (context
== current_function_decl
)
2698 /* Don't mention an inline instance of a nested function. */
2699 if (context
&& DECL_FROM_INLINE (decl
))
2701 if (!MEM_P (decl_rtl
)
2702 || GET_CODE (XEXP (decl_rtl
, 0)) != SYMBOL_REF
)
2705 if (flag_debug_only_used_symbols
)
2706 output_used_types ();
2708 dbxout_begin_complex_stabs ();
2709 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
2710 stabstr_S (TREE_PUBLIC (decl
) ? ":F" : ":f");
2713 if (TREE_TYPE (type
))
2714 dbxout_type (TREE_TYPE (type
), 0);
2716 dbxout_type (void_type_node
, 0);
2718 /* For a nested function, when that function is compiled,
2719 mention the containing function name
2720 as well as (since dbx wants it) our own assembler-name. */
2724 stabstr_I (DECL_ASSEMBLER_NAME (decl
));
2726 stabstr_I (DECL_NAME (context
));
2729 dbxout_finish_complex_stabs (decl
, N_FUN
, XEXP (decl_rtl
, 0), 0, 0);
2733 /* Don't output the same typedef twice.
2734 And don't output what language-specific stuff doesn't want output. */
2735 if (TREE_ASM_WRITTEN (decl
) || TYPE_DECL_SUPPRESS_DEBUG (decl
))
2736 DBXOUT_DECR_NESTING_AND_RETURN (0);
2738 /* Don't output typedefs for types with magic type numbers (XCOFF). */
2739 #ifdef DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER
2741 int fundamental_type_number
=
2742 DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER (decl
);
2744 if (fundamental_type_number
!= 0)
2746 TREE_ASM_WRITTEN (decl
) = 1;
2747 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl
)) = fundamental_type_number
;
2748 DBXOUT_DECR_NESTING_AND_RETURN (0);
2758 if (DECL_NAME (decl
))
2760 /* Nonzero means we must output a tag as well as a typedef. */
2763 /* Handle the case of a C++ structure or union
2764 where the TYPE_NAME is a TYPE_DECL
2765 which gives both a typedef name and a tag. */
2766 /* dbx requires the tag first and the typedef second. */
2767 if ((TREE_CODE (type
) == RECORD_TYPE
2768 || TREE_CODE (type
) == UNION_TYPE
2769 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
2770 && TYPE_NAME (type
) == decl
2771 && !use_gnu_debug_info_extensions
2772 && !TREE_ASM_WRITTEN (TYPE_NAME (type
))
2773 /* Distinguish the implicit typedefs of C++
2774 from explicit ones that might be found in C. */
2775 && DECL_ARTIFICIAL (decl
)
2776 /* Do not generate a tag for incomplete records. */
2777 && COMPLETE_TYPE_P (type
)
2778 /* Do not generate a tag for records of variable size,
2779 since this type can not be properly described in the
2780 DBX format, and it confuses some tools such as objdump. */
2781 && tree_fits_uhwi_p (TYPE_SIZE (type
)))
2783 tree name
= TYPE_IDENTIFIER (type
);
2785 dbxout_begin_complex_stabs ();
2788 dbxout_type (type
, 1);
2789 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
,
2793 dbxout_begin_complex_stabs ();
2795 /* Output leading class/struct qualifiers. */
2796 if (use_gnu_debug_info_extensions
)
2797 dbxout_class_name_qualifiers (decl
);
2799 /* Output typedef name. */
2800 stabstr_I (DECL_NAME (decl
));
2803 /* Short cut way to output a tag also. */
2804 if ((TREE_CODE (type
) == RECORD_TYPE
2805 || TREE_CODE (type
) == UNION_TYPE
2806 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
2807 && TYPE_NAME (type
) == decl
2808 /* Distinguish the implicit typedefs of C++
2809 from explicit ones that might be found in C. */
2810 && DECL_ARTIFICIAL (decl
))
2812 if (use_gnu_debug_info_extensions
)
2815 TREE_ASM_WRITTEN (TYPE_NAME (type
)) = 1;
2820 dbxout_type (type
, 1);
2821 dbxout_finish_complex_stabs (decl
, DBX_TYPE_DECL_STABS_CODE
,
2826 /* Don't output a tag if this is an incomplete type. This prevents
2827 the sun4 Sun OS 4.x dbx from crashing. */
2829 if (tag_needed
&& TYPE_NAME (type
) != 0
2830 && (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
2831 || (DECL_NAME (TYPE_NAME (type
)) != 0))
2832 && COMPLETE_TYPE_P (type
)
2833 && !TREE_ASM_WRITTEN (TYPE_NAME (type
)))
2835 /* For a TYPE_DECL with no name, but the type has a name,
2837 This is what represents `struct foo' with no typedef. */
2838 /* In C++, the name of a type is the corresponding typedef.
2839 In C, it is an IDENTIFIER_NODE. */
2840 tree name
= TYPE_IDENTIFIER (type
);
2842 dbxout_begin_complex_stabs ();
2845 dbxout_type (type
, 1);
2846 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
, 0, 0, 0);
2850 /* If an enum type has no name, it cannot be referred to, but
2851 we must output it anyway, to record the enumeration
2854 if (!did_output
&& TREE_CODE (type
) == ENUMERAL_TYPE
)
2856 dbxout_begin_complex_stabs ();
2857 /* Some debuggers fail when given NULL names, so give this a
2858 harmless name of " " (Why not "(anon)"?). */
2860 dbxout_type (type
, 1);
2861 dbxout_finish_complex_stabs (0, DBX_TYPE_DECL_STABS_CODE
, 0, 0, 0);
2864 /* Prevent duplicate output of a typedef. */
2865 TREE_ASM_WRITTEN (decl
) = 1;
2870 if (DECL_HAS_VALUE_EXPR_P (decl
))
2871 decl
= DECL_VALUE_EXPR (decl
);
2873 /* PARM_DECLs go in their own separate chain and are output by
2874 dbxout_reg_parms and dbxout_parms, except for those that are
2875 disguised VAR_DECLs like Out parameters in Ada. */
2876 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
2878 /* ... fall through ... */
2882 /* Don't mention a variable that is external.
2883 Let the file that defines it describe it. */
2884 if (DECL_EXTERNAL (decl
))
2887 /* If the variable is really a constant
2888 and not written in memory, inform the debugger.
2890 ??? Why do we skip emitting the type and location in this case? */
2891 if (TREE_STATIC (decl
) && TREE_READONLY (decl
)
2892 && DECL_INITIAL (decl
) != 0
2893 && tree_fits_shwi_p (DECL_INITIAL (decl
))
2894 && ! TREE_ASM_WRITTEN (decl
)
2895 && (DECL_FILE_SCOPE_P (decl
)
2896 || TREE_CODE (DECL_CONTEXT (decl
)) == BLOCK
2897 || TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
)
2898 && TREE_PUBLIC (decl
) == 0)
2900 /* The sun4 assembler does not grok this. */
2902 if (TREE_CODE (TREE_TYPE (decl
)) == INTEGER_TYPE
2903 || TREE_CODE (TREE_TYPE (decl
)) == ENUMERAL_TYPE
)
2905 HOST_WIDE_INT ival
= tree_to_shwi (DECL_INITIAL (decl
));
2907 dbxout_begin_complex_stabs ();
2908 dbxout_symbol_name (decl
, NULL
, 'c');
2911 dbxout_finish_complex_stabs (0, N_LSYM
, 0, 0, 0);
2912 DBXOUT_DECR_NESTING
;
2918 /* else it is something we handle like a normal variable. */
2920 decl_rtl
= dbxout_expand_expr (decl
);
2922 DBXOUT_DECR_NESTING_AND_RETURN (0);
2924 if (!is_global_var (decl
))
2925 decl_rtl
= eliminate_regs (decl_rtl
, VOIDmode
, NULL_RTX
);
2926 #ifdef LEAF_REG_REMAP
2927 if (crtl
->uses_only_leaf_regs
)
2928 leaf_renumber_regs_insn (decl_rtl
);
2931 result
= dbxout_symbol_location (decl
, type
, 0, decl_rtl
);
2937 DBXOUT_DECR_NESTING
;
2941 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
2942 Add SUFFIX to its name, if SUFFIX is not 0.
2943 Describe the variable as residing in HOME
2944 (usually HOME is DECL_RTL (DECL), but not always).
2945 Returns 1 if the stab was really emitted. */
2948 dbxout_symbol_location (tree decl
, tree type
, const char *suffix
, rtx home
)
2951 stab_code_type code
;
2956 /* Don't mention a variable at all
2957 if it was completely optimized into nothingness.
2959 If the decl was from an inline function, then its rtl
2960 is not identically the rtl that was used in this
2961 particular compilation. */
2962 if (GET_CODE (home
) == SUBREG
)
2966 while (GET_CODE (value
) == SUBREG
)
2967 value
= SUBREG_REG (value
);
2970 if (REGNO (value
) >= FIRST_PSEUDO_REGISTER
)
2973 home
= alter_subreg (&home
, true);
2977 regno
= REGNO (home
);
2978 if (regno
>= FIRST_PSEUDO_REGISTER
)
2982 /* The kind-of-variable letter depends on where
2983 the variable is and on the scope of its name:
2984 G and N_GSYM for static storage and global scope,
2985 S for static storage and file scope,
2986 V for static storage and local scope,
2987 for those two, use N_LCSYM if data is in bss segment,
2988 N_STSYM if in data segment, N_FUN otherwise.
2989 (We used N_FUN originally, then changed to N_STSYM
2990 to please GDB. However, it seems that confused ld.
2991 Now GDB has been fixed to like N_FUN, says Kingdon.)
2992 no letter at all, and N_LSYM, for auto variable,
2993 r and N_RSYM for register variable. */
2995 if (MEM_P (home
) && GET_CODE (XEXP (home
, 0)) == SYMBOL_REF
)
2997 if (TREE_PUBLIC (decl
))
3002 if (NULL
!= dbxout_common_check (decl
, &offs
))
3011 addr
= XEXP (home
, 0);
3013 letter
= decl_function_context (decl
) ? 'V' : 'S';
3015 /* Some ports can transform a symbol ref into a label ref,
3016 because the symbol ref is too far away and has to be
3017 dumped into a constant pool. Alternatively, the symbol
3018 in the constant pool might be referenced by a different
3020 if (GET_CODE (addr
) == SYMBOL_REF
3021 && CONSTANT_POOL_ADDRESS_P (addr
))
3024 rtx tmp
= get_pool_constant_mark (addr
, &marked
);
3026 if (GET_CODE (tmp
) == SYMBOL_REF
)
3029 if (CONSTANT_POOL_ADDRESS_P (addr
))
3030 get_pool_constant_mark (addr
, &marked
);
3034 else if (GET_CODE (tmp
) == LABEL_REF
)
3040 /* If all references to the constant pool were optimized
3041 out, we just ignore the symbol. */
3046 /* This should be the same condition as in assemble_variable, but
3047 we don't have access to dont_output_data here. So, instead,
3048 we rely on the fact that error_mark_node initializers always
3049 end up in bss for C++ and never end up in bss for C. */
3050 if (DECL_INITIAL (decl
) == 0
3052 && DECL_INITIAL (decl
) == error_mark_node
))
3056 if (NULL
!= dbxout_common_check (decl
, &offs
))
3064 else if (DECL_IN_TEXT_SECTION (decl
))
3065 /* This is not quite right, but it's the closest
3066 of all the codes that Unix defines. */
3067 code
= DBX_STATIC_CONST_VAR_CODE
;
3070 /* Ultrix `as' seems to need this. */
3071 #ifdef DBX_STATIC_STAB_DATA_SECTION
3072 switch_to_section (data_section
);
3078 else if (regno
>= 0)
3082 number
= DBX_REGISTER_NUMBER (regno
);
3084 else if (MEM_P (home
)
3085 && (MEM_P (XEXP (home
, 0))
3086 || (REG_P (XEXP (home
, 0))
3087 && REGNO (XEXP (home
, 0)) != HARD_FRAME_POINTER_REGNUM
3088 && REGNO (XEXP (home
, 0)) != STACK_POINTER_REGNUM
3089 #if !HARD_FRAME_POINTER_IS_ARG_POINTER
3090 && REGNO (XEXP (home
, 0)) != ARG_POINTER_REGNUM
3093 /* If the value is indirect by memory or by a register
3094 that isn't the frame pointer
3095 then it means the object is variable-sized and address through
3096 that register or stack slot. DBX has no way to represent this
3097 so all we can do is output the variable as a pointer.
3098 If it's not a parameter, ignore it. */
3100 if (REG_P (XEXP (home
, 0)))
3104 if (REGNO (XEXP (home
, 0)) >= FIRST_PSEUDO_REGISTER
)
3106 number
= DBX_REGISTER_NUMBER (REGNO (XEXP (home
, 0)));
3111 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
3112 We want the value of that CONST_INT. */
3113 number
= DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home
, 0), 0));
3116 /* Effectively do build_pointer_type, but don't cache this type,
3117 since it might be temporary whereas the type it points to
3118 might have been saved for inlining. */
3119 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
3120 type
= make_node (POINTER_TYPE
);
3121 TREE_TYPE (type
) = TREE_TYPE (decl
);
3123 else if (MEM_P (home
)
3124 && REG_P (XEXP (home
, 0)))
3127 number
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
3129 else if (MEM_P (home
)
3130 && GET_CODE (XEXP (home
, 0)) == PLUS
3131 && CONST_INT_P (XEXP (XEXP (home
, 0), 1)))
3134 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
3135 We want the value of that CONST_INT. */
3136 number
= DEBUGGER_AUTO_OFFSET (XEXP (home
, 0));
3138 else if (MEM_P (home
)
3139 && GET_CODE (XEXP (home
, 0)) == CONST
)
3141 /* Handle an obscure case which can arise when optimizing and
3142 when there are few available registers. (This is *always*
3143 the case for i386/i486 targets). The RTL looks like
3144 (MEM (CONST ...)) even though this variable is a local `auto'
3145 or a local `register' variable. In effect, what has happened
3146 is that the reload pass has seen that all assignments and
3147 references for one such a local variable can be replaced by
3148 equivalent assignments and references to some static storage
3149 variable, thereby avoiding the need for a register. In such
3150 cases we're forced to lie to debuggers and tell them that
3151 this variable was itself `static'. */
3155 if (NULL
== dbxout_common_check (decl
, &offs
))
3156 addr
= XEXP (XEXP (home
, 0), 0);
3164 else if (GET_CODE (home
) == CONCAT
)
3168 /* If TYPE is not a COMPLEX_TYPE (it might be a RECORD_TYPE,
3169 for example), then there is no easy way to figure out
3170 what SUBTYPE should be. So, we give up. */
3171 if (TREE_CODE (type
) != COMPLEX_TYPE
)
3174 subtype
= TREE_TYPE (type
);
3176 /* If the variable's storage is in two parts,
3177 output each as a separate stab with a modified name. */
3178 if (WORDS_BIG_ENDIAN
)
3179 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 0));
3181 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 0));
3183 if (WORDS_BIG_ENDIAN
)
3184 dbxout_symbol_location (decl
, subtype
, "$real", XEXP (home
, 1));
3186 dbxout_symbol_location (decl
, subtype
, "$imag", XEXP (home
, 1));
3190 /* Address might be a MEM, when DECL is a variable-sized object.
3191 Or it might be const0_rtx, meaning previous passes
3192 want us to ignore this variable. */
3195 /* Ok, start a symtab entry and output the variable name. */
3196 emit_pending_bincls_if_required ();
3199 #ifdef DBX_STATIC_BLOCK_START
3200 DBX_STATIC_BLOCK_START (asm_out_file
, code
);
3203 dbxout_begin_complex_stabs_noforcetext ();
3204 dbxout_symbol_name (decl
, suffix
, letter
);
3205 dbxout_type (type
, 0);
3206 dbxout_finish_complex_stabs (decl
, code
, addr
, 0, number
);
3208 #ifdef DBX_STATIC_BLOCK_END
3209 DBX_STATIC_BLOCK_END (asm_out_file
, code
);
3214 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
3215 Then output LETTER to indicate the kind of location the symbol has. */
3218 dbxout_symbol_name (tree decl
, const char *suffix
, int letter
)
3222 if (DECL_CONTEXT (decl
)
3223 && (TYPE_P (DECL_CONTEXT (decl
))
3224 || TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
))
3225 /* One slight hitch: if this is a VAR_DECL which is a class member
3226 or a namespace member, we must put out the mangled name instead of the
3227 DECL_NAME. Note also that static member (variable) names DO NOT begin
3228 with underscores in .stabs directives. */
3229 name
= DECL_ASSEMBLER_NAME (decl
);
3231 /* ...but if we're function-local, we don't want to include the junk
3232 added by ASM_FORMAT_PRIVATE_NAME. */
3233 name
= DECL_NAME (decl
);
3238 stabstr_S ("(anon)");
3248 /* Output the common block name for DECL in a stabs.
3250 Symbols in global common (.comm) get wrapped with an N_BCOMM/N_ECOMM pair
3251 around each group of symbols in the same .comm area. The N_GSYM stabs
3252 that are emitted only contain the offset in the common area. This routine
3253 emits the N_BCOMM and N_ECOMM stabs. */
3256 dbxout_common_name (tree decl
, const char *name
, stab_code_type op
)
3258 dbxout_begin_complex_stabs ();
3260 dbxout_finish_complex_stabs (decl
, op
, NULL_RTX
, NULL
, 0);
3263 /* Check decl to determine whether it is a VAR_DECL destined for storage in a
3264 common area. If it is, the return value will be a non-null string giving
3265 the name of the common storage block it will go into. If non-null, the
3266 value is the offset into the common block for that symbol's storage. */
3269 dbxout_common_check (tree decl
, int *value
)
3273 const char *name
= NULL
;
3275 /* If the decl isn't a VAR_DECL, or if it isn't static, or if
3276 it does not have a value (the offset into the common area), or if it
3277 is thread local (as opposed to global) then it isn't common, and shouldn't
3280 ??? DECL_THREAD_LOCAL_P check prevents problems with improper .stabs
3281 for thread-local symbols. Can be handled via same mechanism as used
3283 if (TREE_CODE (decl
) != VAR_DECL
3284 || !TREE_STATIC (decl
)
3285 || !DECL_HAS_VALUE_EXPR_P (decl
)
3286 || DECL_THREAD_LOCAL_P (decl
)
3290 home
= DECL_RTL (decl
);
3291 if (home
== NULL_RTX
|| GET_CODE (home
) != MEM
)
3294 sym_addr
= dbxout_expand_expr (DECL_VALUE_EXPR (decl
));
3295 if (sym_addr
== NULL_RTX
|| GET_CODE (sym_addr
) != MEM
)
3298 sym_addr
= XEXP (sym_addr
, 0);
3299 if (GET_CODE (sym_addr
) == CONST
)
3300 sym_addr
= XEXP (sym_addr
, 0);
3301 if ((GET_CODE (sym_addr
) == SYMBOL_REF
|| GET_CODE (sym_addr
) == PLUS
)
3302 && DECL_INITIAL (decl
) == 0)
3305 /* We have a sym that will go into a common area, meaning that it
3306 will get storage reserved with a .comm/.lcomm assembler pseudo-op.
3308 Determine name of common area this symbol will be an offset into,
3309 and offset into that area. Also retrieve the decl for the area
3310 that the symbol is offset into. */
3313 switch (GET_CODE (sym_addr
))
3316 if (CONST_INT_P (XEXP (sym_addr
, 0)))
3319 targetm
.strip_name_encoding (XSTR (XEXP (sym_addr
, 1), 0));
3320 *value
= INTVAL (XEXP (sym_addr
, 0));
3321 cdecl = SYMBOL_REF_DECL (XEXP (sym_addr
, 1));
3326 targetm
.strip_name_encoding (XSTR (XEXP (sym_addr
, 0), 0));
3327 *value
= INTVAL (XEXP (sym_addr
, 1));
3328 cdecl = SYMBOL_REF_DECL (XEXP (sym_addr
, 0));
3333 name
= targetm
.strip_name_encoding (XSTR (sym_addr
, 0));
3335 cdecl = SYMBOL_REF_DECL (sym_addr
);
3339 error ("common symbol debug info is not structured as "
3343 /* Check area common symbol is offset into. If this is not public, then
3344 it is not a symbol in a common block. It must be a .lcomm symbol, not
3346 if (cdecl == NULL
|| !TREE_PUBLIC (cdecl))
3355 /* Output definitions of all the decls in a chain. Return nonzero if
3356 anything was output */
3359 dbxout_syms (tree syms
)
3362 const char *comm_prev
= NULL
;
3363 tree syms_prev
= NULL
;
3367 int temp
, copen
, cclos
;
3368 const char *comm_new
;
3370 /* Check for common symbol, and then progression into a new/different
3371 block of common symbols. Emit closing/opening common bracket if
3373 comm_new
= dbxout_common_check (syms
, &temp
);
3374 copen
= comm_new
!= NULL
3375 && (comm_prev
== NULL
|| strcmp (comm_new
, comm_prev
));
3376 cclos
= comm_prev
!= NULL
3377 && (comm_new
== NULL
|| strcmp (comm_new
, comm_prev
));
3379 dbxout_common_name (syms_prev
, comm_prev
, N_ECOMM
);
3382 dbxout_common_name (syms
, comm_new
, N_BCOMM
);
3385 comm_prev
= comm_new
;
3387 result
+= dbxout_symbol (syms
, 1);
3388 syms
= DECL_CHAIN (syms
);
3391 if (comm_prev
!= NULL
)
3392 dbxout_common_name (syms_prev
, comm_prev
, N_ECOMM
);
3397 /* The following two functions output definitions of function parameters.
3398 Each parameter gets a definition locating it in the parameter list.
3399 Each parameter that is a register variable gets a second definition
3400 locating it in the register.
3402 Printing or argument lists in gdb uses the definitions that
3403 locate in the parameter list. But reference to the variable in
3404 expressions uses preferentially the definition as a register. */
3406 /* Output definitions, referring to storage in the parmlist,
3407 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
3410 dbxout_parms (tree parms
)
3413 emit_pending_bincls_if_required ();
3415 for (; parms
; parms
= DECL_CHAIN (parms
))
3416 if (DECL_NAME (parms
)
3417 && TREE_TYPE (parms
) != error_mark_node
3418 && DECL_RTL_SET_P (parms
)
3419 && DECL_INCOMING_RTL (parms
))
3423 stab_code_type code
;
3426 /* Perform any necessary register eliminations on the parameter's rtl,
3427 so that the debugging output will be accurate. */
3428 DECL_INCOMING_RTL (parms
)
3429 = eliminate_regs (DECL_INCOMING_RTL (parms
), VOIDmode
, NULL_RTX
);
3430 SET_DECL_RTL (parms
,
3431 eliminate_regs (DECL_RTL (parms
), VOIDmode
, NULL_RTX
));
3432 #ifdef LEAF_REG_REMAP
3433 if (crtl
->uses_only_leaf_regs
)
3435 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms
));
3436 leaf_renumber_regs_insn (DECL_RTL (parms
));
3440 if (PARM_PASSED_IN_MEMORY (parms
))
3442 rtx inrtl
= XEXP (DECL_INCOMING_RTL (parms
), 0);
3444 /* ??? Here we assume that the parm address is indexed
3445 off the frame pointer or arg pointer.
3446 If that is not true, we produce meaningless results,
3447 but do not crash. */
3448 if (GET_CODE (inrtl
) == PLUS
3449 && CONST_INT_P (XEXP (inrtl
, 1)))
3450 number
= INTVAL (XEXP (inrtl
, 1));
3455 number
= DEBUGGER_ARG_OFFSET (number
, inrtl
);
3458 /* It is quite tempting to use TREE_TYPE (parms) instead
3459 of DECL_ARG_TYPE (parms) for the eff_type, so that gcc
3460 reports the actual type of the parameter, rather than
3461 the promoted type. This certainly makes GDB's life
3462 easier, at least for some ports. The change is a bad
3463 idea however, since GDB expects to be able access the
3464 type without performing any conversions. So for
3465 example, if we were passing a float to an unprototyped
3466 function, gcc will store a double on the stack, but if
3467 we emit a stab saying the type is a float, then gdb
3468 will only read in a single value, and this will produce
3469 an erroneous value. */
3470 eff_type
= DECL_ARG_TYPE (parms
);
3472 else if (REG_P (DECL_RTL (parms
)))
3476 /* Parm passed in registers and lives in registers or nowhere. */
3477 code
= DBX_REGPARM_STABS_CODE
;
3478 letter
= DBX_REGPARM_STABS_LETTER
;
3480 /* For parms passed in registers, it is better to use the
3481 declared type of the variable, not the type it arrived in. */
3482 eff_type
= TREE_TYPE (parms
);
3484 /* If parm lives in a register, use that register; pretend
3485 the parm was passed there. It would be more consistent
3486 to describe the register where the parm was passed, but
3487 in practice that register usually holds something else.
3488 If the parm lives nowhere, use the register where it
3490 if (REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
3491 best_rtl
= DECL_RTL (parms
);
3492 else if (GET_CODE (DECL_INCOMING_RTL (parms
)) == PARALLEL
)
3493 best_rtl
= XEXP (XVECEXP (DECL_INCOMING_RTL (parms
), 0, 0), 0);
3495 best_rtl
= DECL_INCOMING_RTL (parms
);
3497 number
= DBX_REGISTER_NUMBER (REGNO (best_rtl
));
3499 else if (MEM_P (DECL_RTL (parms
))
3500 && REG_P (XEXP (DECL_RTL (parms
), 0))
3501 && REGNO (XEXP (DECL_RTL (parms
), 0)) != HARD_FRAME_POINTER_REGNUM
3502 && REGNO (XEXP (DECL_RTL (parms
), 0)) != STACK_POINTER_REGNUM
3503 #if !HARD_FRAME_POINTER_IS_ARG_POINTER
3504 && REGNO (XEXP (DECL_RTL (parms
), 0)) != ARG_POINTER_REGNUM
3508 /* Parm was passed via invisible reference.
3509 That is, its address was passed in a register.
3510 Output it as if it lived in that register.
3511 The debugger will know from the type
3512 that it was actually passed by invisible reference. */
3514 code
= DBX_REGPARM_STABS_CODE
;
3516 /* GDB likes this marked with a special letter. */
3517 letter
= (use_gnu_debug_info_extensions
3518 ? 'a' : DBX_REGPARM_STABS_LETTER
);
3519 eff_type
= TREE_TYPE (parms
);
3521 /* DECL_RTL looks like (MEM (REG...). Get the register number.
3522 If it is an unallocated pseudo-reg, then use the register where
3523 it was passed instead.
3524 ??? Why is DBX_REGISTER_NUMBER not used here? */
3526 if (REGNO (XEXP (DECL_RTL (parms
), 0)) < FIRST_PSEUDO_REGISTER
)
3527 number
= REGNO (XEXP (DECL_RTL (parms
), 0));
3529 number
= REGNO (DECL_INCOMING_RTL (parms
));
3531 else if (MEM_P (DECL_RTL (parms
))
3532 && MEM_P (XEXP (DECL_RTL (parms
), 0)))
3534 /* Parm was passed via invisible reference, with the reference
3535 living on the stack. DECL_RTL looks like
3536 (MEM (MEM (PLUS (REG ...) (CONST_INT ...)))) or it
3537 could look like (MEM (MEM (REG))). */
3541 eff_type
= TREE_TYPE (parms
);
3543 if (!REG_P (XEXP (XEXP (DECL_RTL (parms
), 0), 0)))
3544 number
= INTVAL (XEXP (XEXP (XEXP (DECL_RTL (parms
), 0), 0), 1));
3548 number
= DEBUGGER_ARG_OFFSET (number
,
3549 XEXP (XEXP (DECL_RTL (parms
), 0), 0));
3551 else if (MEM_P (DECL_RTL (parms
))
3552 && XEXP (DECL_RTL (parms
), 0) != const0_rtx
3553 /* ??? A constant address for a parm can happen
3554 when the reg it lives in is equiv to a constant in memory.
3555 Should make this not happen, after 2.4. */
3556 && ! CONSTANT_P (XEXP (DECL_RTL (parms
), 0)))
3558 /* Parm was passed in registers but lives on the stack. */
3562 eff_type
= TREE_TYPE (parms
);
3564 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
3565 in which case we want the value of that CONST_INT,
3567 in which case we use a value of zero. */
3568 if (!REG_P (XEXP (DECL_RTL (parms
), 0)))
3569 number
= INTVAL (XEXP (XEXP (DECL_RTL (parms
), 0), 1));
3573 /* Make a big endian correction if the mode of the type of the
3574 parameter is not the same as the mode of the rtl. */
3575 if (BYTES_BIG_ENDIAN
3576 && TYPE_MODE (TREE_TYPE (parms
)) != GET_MODE (DECL_RTL (parms
))
3577 && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
))) < UNITS_PER_WORD
)
3578 number
+= (GET_MODE_SIZE (GET_MODE (DECL_RTL (parms
)))
3579 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms
))));
3582 /* ??? We don't know how to represent this argument. */
3585 dbxout_begin_complex_stabs ();
3587 if (DECL_NAME (parms
))
3589 stabstr_I (DECL_NAME (parms
));
3593 stabstr_S ("(anon):");
3595 dbxout_type (eff_type
, 0);
3596 dbxout_finish_complex_stabs (parms
, code
, 0, 0, number
);
3598 DBXOUT_DECR_NESTING
;
3601 /* Output definitions for the places where parms live during the function,
3602 when different from where they were passed, when the parms were passed
3605 It is not useful to do this for parms passed in registers
3606 that live during the function in different registers, because it is
3607 impossible to look in the passed register for the passed value,
3608 so we use the within-the-function register to begin with.
3610 PARMS is a chain of PARM_DECL nodes. */
3613 dbxout_reg_parms (tree parms
)
3617 for (; parms
; parms
= DECL_CHAIN (parms
))
3618 if (DECL_NAME (parms
) && PARM_PASSED_IN_MEMORY (parms
))
3620 /* Report parms that live in registers during the function
3621 but were passed in memory. */
3622 if (REG_P (DECL_RTL (parms
))
3623 && REGNO (DECL_RTL (parms
)) < FIRST_PSEUDO_REGISTER
)
3624 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3625 0, DECL_RTL (parms
));
3626 else if (GET_CODE (DECL_RTL (parms
)) == CONCAT
)
3627 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3628 0, DECL_RTL (parms
));
3629 /* Report parms that live in memory but not where they were passed. */
3630 else if (MEM_P (DECL_RTL (parms
))
3631 && ! rtx_equal_p (DECL_RTL (parms
), DECL_INCOMING_RTL (parms
)))
3632 dbxout_symbol_location (parms
, TREE_TYPE (parms
),
3633 0, DECL_RTL (parms
));
3635 DBXOUT_DECR_NESTING
;
3638 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
3639 output definitions of those names, in raw form */
3642 dbxout_args (tree args
)
3647 dbxout_type (TREE_VALUE (args
), 0);
3648 args
= TREE_CHAIN (args
);
3652 #if defined (DBX_DEBUGGING_INFO)
3654 /* Subroutine of dbxout_block. Emit an N_LBRAC stab referencing LABEL.
3655 BEGIN_LABEL is the name of the beginning of the function, which may
3658 dbx_output_lbrac (const char *label
,
3659 const char *begin_label ATTRIBUTE_UNUSED
)
3661 dbxout_begin_stabn (N_LBRAC
);
3662 if (DBX_BLOCKS_FUNCTION_RELATIVE
)
3663 dbxout_stab_value_label_diff (label
, begin_label
);
3665 dbxout_stab_value_label (label
);
3668 /* Subroutine of dbxout_block. Emit an N_RBRAC stab referencing LABEL.
3669 BEGIN_LABEL is the name of the beginning of the function, which may
3672 dbx_output_rbrac (const char *label
,
3673 const char *begin_label ATTRIBUTE_UNUSED
)
3675 dbxout_begin_stabn (N_RBRAC
);
3676 if (DBX_BLOCKS_FUNCTION_RELATIVE
)
3677 dbxout_stab_value_label_diff (label
, begin_label
);
3679 dbxout_stab_value_label (label
);
3682 /* Output everything about a symbol block (a BLOCK node
3683 that represents a scope level),
3684 including recursive output of contained blocks.
3686 BLOCK is the BLOCK node.
3687 DEPTH is its depth within containing symbol blocks.
3688 ARGS is usually zero; but for the outermost block of the
3689 body of a function, it is a chain of PARM_DECLs for the function parameters.
3690 We output definitions of all the register parms
3691 as if they were local variables of that block.
3693 If -g1 was used, we count blocks just the same, but output nothing
3694 except for the outermost block.
3696 Actually, BLOCK may be several blocks chained together.
3697 We handle them all in sequence. */
3700 dbxout_block (tree block
, int depth
, tree args
)
3702 char begin_label
[20];
3703 /* Reference current function start using LFBB. */
3704 ASM_GENERATE_INTERNAL_LABEL (begin_label
, "LFBB", scope_labelno
);
3708 /* Ignore blocks never expanded or otherwise marked as real. */
3709 if (TREE_USED (block
) && TREE_ASM_WRITTEN (block
))
3712 int blocknum
= BLOCK_NUMBER (block
);
3714 /* In dbx format, the syms of a block come before the N_LBRAC.
3715 If nothing is output, we don't need the N_LBRAC, either. */
3717 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
3718 did_output
= dbxout_syms (BLOCK_VARS (block
));
3720 dbxout_reg_parms (args
);
3722 /* Now output an N_LBRAC symbol to represent the beginning of
3723 the block. Use the block's tree-walk order to generate
3724 the assembler symbols LBBn and LBEn
3725 that final will define around the code in this block. */
3729 const char *scope_start
;
3732 /* The outermost block doesn't get LBB labels; use
3733 the LFBB local symbol emitted by dbxout_begin_prologue. */
3734 scope_start
= begin_label
;
3737 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBB", blocknum
);
3741 dbx_output_lbrac (scope_start
, begin_label
);
3744 /* Output the subblocks. */
3745 dbxout_block (BLOCK_SUBBLOCKS (block
), depth
+ 1, NULL_TREE
);
3747 /* Refer to the marker for the end of the block. */
3752 /* The outermost block doesn't get LBE labels;
3753 use the "scope" label which will be emitted
3754 by dbxout_function_end. */
3755 ASM_GENERATE_INTERNAL_LABEL (buf
, "Lscope", scope_labelno
);
3757 ASM_GENERATE_INTERNAL_LABEL (buf
, "LBE", blocknum
);
3759 dbx_output_rbrac (buf
, begin_label
);
3762 block
= BLOCK_CHAIN (block
);
3766 /* Output the information about a function and its arguments and result.
3767 Usually this follows the function's code,
3768 but on some systems, it comes before. */
3771 dbxout_begin_function (tree decl
)
3773 int saved_tree_used1
;
3775 saved_tree_used1
= TREE_USED (decl
);
3776 TREE_USED (decl
) = 1;
3777 if (DECL_NAME (DECL_RESULT (decl
)) != 0)
3779 int saved_tree_used2
= TREE_USED (DECL_RESULT (decl
));
3780 TREE_USED (DECL_RESULT (decl
)) = 1;
3781 dbxout_symbol (decl
, 0);
3782 TREE_USED (DECL_RESULT (decl
)) = saved_tree_used2
;
3785 dbxout_symbol (decl
, 0);
3786 TREE_USED (decl
) = saved_tree_used1
;
3788 dbxout_parms (DECL_ARGUMENTS (decl
));
3789 if (DECL_NAME (DECL_RESULT (decl
)) != 0)
3790 dbxout_symbol (DECL_RESULT (decl
), 1);
3792 #endif /* DBX_DEBUGGING_INFO */
3794 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
3796 /* Record an element in the table of global destructors. SYMBOL is
3797 a SYMBOL_REF of the function to be called; PRIORITY is a number
3798 between 0 and MAX_INIT_PRIORITY. */
3801 default_stabs_asm_out_destructor (rtx symbol ATTRIBUTE_UNUSED
,
3802 int priority ATTRIBUTE_UNUSED
)
3804 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
3805 /* Tell GNU LD that this is part of the static destructor set.
3806 This will work for any system that uses stabs, most usefully
3808 dbxout_begin_simple_stabs ("___DTOR_LIST__", 22 /* N_SETT */);
3809 dbxout_stab_value_label (XSTR (symbol
, 0));
3811 sorry ("global destructors not supported on this target");
3815 /* Likewise for global constructors. */
3818 default_stabs_asm_out_constructor (rtx symbol ATTRIBUTE_UNUSED
,
3819 int priority ATTRIBUTE_UNUSED
)
3821 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
3822 /* Tell GNU LD that this is part of the static destructor set.
3823 This will work for any system that uses stabs, most usefully
3825 dbxout_begin_simple_stabs ("___CTOR_LIST__", 22 /* N_SETT */);
3826 dbxout_stab_value_label (XSTR (symbol
, 0));
3828 sorry ("global constructors not supported on this target");
3832 #include "gt-dbxout.h"