1 /* Output Dwarf format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com) of Network Computing Devices.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #ifdef DWARF_DEBUGGING_INFO
31 #include "hard-reg-set.h"
32 #include "insn-config.h"
40 /* We cannot use <assert.h> in GCC source, since that would include
41 GCC's assert.h, which may not be compatible with the host compiler. */
46 # define assert(e) do { if (! (e)) abort (); } while (0)
49 /* IMPORTANT NOTE: Please see the file README.DWARF for important details
50 regarding the GNU implementation of Dwarf. */
52 /* NOTE: In the comments in this file, many references are made to
53 so called "Debugging Information Entries". For the sake of brevity,
54 this term is abbreviated to `DIE' throughout the remainder of this
57 /* Note that the implementation of C++ support herein is (as yet) unfinished.
58 If you want to try to complete it, more power to you. */
60 /* How to start an assembler comment. */
61 #ifndef ASM_COMMENT_START
62 #define ASM_COMMENT_START ";#"
65 /* How to print out a register name. */
67 #define PRINT_REG(RTX, CODE, FILE) \
68 fprintf ((FILE), "%s", reg_names[REGNO (RTX)])
71 /* Define a macro which returns non-zero for any tagged type which is
72 used (directly or indirectly) in the specification of either some
73 function's return type or some formal parameter of some function.
74 We use this macro when we are operating in "terse" mode to help us
75 know what tagged types have to be represented in Dwarf (even in
76 terse mode) and which ones don't.
78 A flag bit with this meaning really should be a part of the normal
79 GCC ..._TYPE nodes, but at the moment, there is no such bit defined
80 for these nodes. For now, we have to just fake it. It it safe for
81 us to simply return zero for all complete tagged types (which will
82 get forced out anyway if they were used in the specification of some
83 formal or return type) and non-zero for all incomplete tagged types.
86 #define TYPE_USED_FOR_FUNCTION(tagged_type) (TYPE_SIZE (tagged_type) == 0)
88 /* Define a macro which returns non-zero for a TYPE_DECL which was
89 implicitly generated for a tagged type.
91 Note that unlike the gcc front end (which generates a NULL named
92 TYPE_DECL node for each complete tagged type, each array type, and
93 each function type node created) the g++ front end generates a
94 _named_ TYPE_DECL node for each tagged type node created.
95 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
96 generate a DW_TAG_typedef DIE for them. */
97 #define TYPE_DECL_IS_STUB(decl) \
98 (DECL_NAME (decl) == NULL \
99 || (DECL_ARTIFICIAL (decl) \
100 && is_tagged_type (TREE_TYPE (decl)) \
101 && decl == TYPE_STUB_DECL (TREE_TYPE (decl))))
103 extern int flag_traditional;
105 /* Maximum size (in bytes) of an artificially generated label. */
107 #define MAX_ARTIFICIAL_LABEL_BYTES 30
109 /* Make sure we know the sizes of the various types dwarf can describe.
110 These are only defaults. If the sizes are different for your target,
111 you should override these values by defining the appropriate symbols
112 in your tm.h file. */
114 #ifndef CHAR_TYPE_SIZE
115 #define CHAR_TYPE_SIZE BITS_PER_UNIT
118 #ifndef SHORT_TYPE_SIZE
119 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
122 #ifndef INT_TYPE_SIZE
123 #define INT_TYPE_SIZE BITS_PER_WORD
126 #ifndef LONG_TYPE_SIZE
127 #define LONG_TYPE_SIZE BITS_PER_WORD
130 #ifndef LONG_LONG_TYPE_SIZE
131 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
134 #ifndef WCHAR_TYPE_SIZE
135 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
138 #ifndef WCHAR_UNSIGNED
139 #define WCHAR_UNSIGNED 0
142 #ifndef FLOAT_TYPE_SIZE
143 #define FLOAT_TYPE_SIZE BITS_PER_WORD
146 #ifndef DOUBLE_TYPE_SIZE
147 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
150 #ifndef LONG_DOUBLE_TYPE_SIZE
151 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
154 /* Structure to keep track of source filenames. */
156 struct filename_entry {
161 typedef struct filename_entry filename_entry;
163 /* Pointer to an array of elements, each one having the structure above. */
165 static filename_entry *filename_table;
167 /* Total number of entries in the table (i.e. array) pointed to by
168 `filename_table'. This is the *total* and includes both used and
171 static unsigned ft_entries_allocated;
173 /* Number of entries in the filename_table which are actually in use. */
175 static unsigned ft_entries;
177 /* Size (in elements) of increments by which we may expand the filename
178 table. Actually, a single hunk of space of this size should be enough
179 for most typical programs. */
181 #define FT_ENTRIES_INCREMENT 64
183 /* Local pointer to the name of the main input file. Initialized in
186 static const char *primary_filename;
188 /* Pointer to the most recent filename for which we produced some line info. */
190 static const char *last_filename;
192 /* Counter to generate unique names for DIEs. */
194 static unsigned next_unused_dienum = 1;
196 /* Number of the DIE which is currently being generated. */
198 static unsigned current_dienum;
200 /* Number to use for the special "pubname" label on the next DIE which
201 represents a function or data object defined in this compilation
202 unit which has "extern" linkage. */
204 static int next_pubname_number = 0;
206 #define NEXT_DIE_NUM pending_sibling_stack[pending_siblings-1]
208 /* Pointer to a dynamically allocated list of pre-reserved and still
209 pending sibling DIE numbers. Note that this list will grow as needed. */
211 static unsigned *pending_sibling_stack;
213 /* Counter to keep track of the number of pre-reserved and still pending
214 sibling DIE numbers. */
216 static unsigned pending_siblings;
218 /* The currently allocated size of the above list (expressed in number of
221 static unsigned pending_siblings_allocated;
223 /* Size (in elements) of increments by which we may expand the pending
224 sibling stack. Actually, a single hunk of space of this size should
225 be enough for most typical programs. */
227 #define PENDING_SIBLINGS_INCREMENT 64
229 /* Non-zero if we are performing our file-scope finalization pass and if
230 we should force out Dwarf descriptions of any and all file-scope
231 tagged types which are still incomplete types. */
233 static int finalizing = 0;
235 /* A pointer to the base of a list of pending types which we haven't
236 generated DIEs for yet, but which we will have to come back to
239 static tree *pending_types_list;
241 /* Number of elements currently allocated for the pending_types_list. */
243 static unsigned pending_types_allocated;
245 /* Number of elements of pending_types_list currently in use. */
247 static unsigned pending_types;
249 /* Size (in elements) of increments by which we may expand the pending
250 types list. Actually, a single hunk of space of this size should
251 be enough for most typical programs. */
253 #define PENDING_TYPES_INCREMENT 64
255 /* A pointer to the base of a list of incomplete types which might be
256 completed at some later time. */
258 static tree *incomplete_types_list;
260 /* Number of elements currently allocated for the incomplete_types_list. */
261 static unsigned incomplete_types_allocated;
263 /* Number of elements of incomplete_types_list currently in use. */
264 static unsigned incomplete_types;
266 /* Size (in elements) of increments by which we may expand the incomplete
267 types list. Actually, a single hunk of space of this size should
268 be enough for most typical programs. */
269 #define INCOMPLETE_TYPES_INCREMENT 64
271 /* Pointer to an artificial RECORD_TYPE which we create in dwarfout_init.
272 This is used in a hack to help us get the DIEs describing types of
273 formal parameters to come *after* all of the DIEs describing the formal
274 parameters themselves. That's necessary in order to be compatible
275 with what the brain-damaged svr4 SDB debugger requires. */
277 static tree fake_containing_scope;
279 /* The number of the current function definition that we are generating
280 debugging information for. These numbers range from 1 up to the maximum
281 number of function definitions contained within the current compilation
282 unit. These numbers are used to create unique labels for various things
283 contained within various function definitions. */
285 static unsigned current_funcdef_number = 1;
287 /* A pointer to the ..._DECL node which we have most recently been working
288 on. We keep this around just in case something about it looks screwy
289 and we want to tell the user what the source coordinates for the actual
292 static tree dwarf_last_decl;
294 /* A flag indicating that we are emitting the member declarations of a
295 class, so member functions and variables should not be entirely emitted.
296 This is a kludge to avoid passing a second argument to output_*_die. */
300 /* Forward declarations for functions defined in this file. */
302 static const char *dwarf_tag_name PARAMS ((unsigned));
303 static const char *dwarf_attr_name PARAMS ((unsigned));
304 static const char *dwarf_stack_op_name PARAMS ((unsigned));
305 static const char *dwarf_typemod_name PARAMS ((unsigned));
306 static const char *dwarf_fmt_byte_name PARAMS ((unsigned));
307 static const char *dwarf_fund_type_name PARAMS ((unsigned));
308 static tree decl_ultimate_origin PARAMS ((tree));
309 static tree block_ultimate_origin PARAMS ((tree));
310 static tree decl_class_context PARAMS ((tree));
312 static void output_unsigned_leb128 PARAMS ((unsigned long));
313 static void output_signed_leb128 PARAMS ((long));
315 static int fundamental_type_code PARAMS ((tree));
316 static tree root_type_1 PARAMS ((tree, int));
317 static tree root_type PARAMS ((tree));
318 static void write_modifier_bytes_1 PARAMS ((tree, int, int, int));
319 static void write_modifier_bytes PARAMS ((tree, int, int));
320 static inline int type_is_fundamental PARAMS ((tree));
321 static void equate_decl_number_to_die_number PARAMS ((tree));
322 static inline void equate_type_number_to_die_number PARAMS ((tree));
323 static void output_reg_number PARAMS ((rtx));
324 static void output_mem_loc_descriptor PARAMS ((rtx));
325 static void output_loc_descriptor PARAMS ((rtx));
326 static void output_bound_representation PARAMS ((tree, unsigned, int));
327 static void output_enumeral_list PARAMS ((tree));
328 static inline HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int));
329 static inline tree field_type PARAMS ((tree));
330 static inline unsigned int simple_type_align_in_bits PARAMS ((tree));
331 static inline unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree));
332 static HOST_WIDE_INT field_byte_offset PARAMS ((tree));
333 static inline void sibling_attribute PARAMS ((void));
334 static void location_attribute PARAMS ((rtx));
335 static void data_member_location_attribute PARAMS ((tree));
336 static void const_value_attribute PARAMS ((rtx));
337 static void location_or_const_value_attribute PARAMS ((tree));
338 static inline void name_attribute PARAMS ((const char *));
339 static inline void fund_type_attribute PARAMS ((unsigned));
340 static void mod_fund_type_attribute PARAMS ((tree, int, int));
341 static inline void user_def_type_attribute PARAMS ((tree));
342 static void mod_u_d_type_attribute PARAMS ((tree, int, int));
343 #ifdef USE_ORDERING_ATTRIBUTE
344 static inline void ordering_attribute PARAMS ((unsigned));
345 #endif /* defined(USE_ORDERING_ATTRIBUTE) */
346 static void subscript_data_attribute PARAMS ((tree));
347 static void byte_size_attribute PARAMS ((tree));
348 static inline void bit_offset_attribute PARAMS ((tree));
349 static inline void bit_size_attribute PARAMS ((tree));
350 static inline void element_list_attribute PARAMS ((tree));
351 static inline void stmt_list_attribute PARAMS ((const char *));
352 static inline void low_pc_attribute PARAMS ((const char *));
353 static inline void high_pc_attribute PARAMS ((const char *));
354 static inline void body_begin_attribute PARAMS ((const char *));
355 static inline void body_end_attribute PARAMS ((const char *));
356 static inline void language_attribute PARAMS ((unsigned));
357 static inline void member_attribute PARAMS ((tree));
359 static inline void string_length_attribute PARAMS ((tree));
361 static inline void comp_dir_attribute PARAMS ((const char *));
362 static inline void sf_names_attribute PARAMS ((const char *));
363 static inline void src_info_attribute PARAMS ((const char *));
364 static inline void mac_info_attribute PARAMS ((const char *));
365 static inline void prototyped_attribute PARAMS ((tree));
366 static inline void producer_attribute PARAMS ((const char *));
367 static inline void inline_attribute PARAMS ((tree));
368 static inline void containing_type_attribute PARAMS ((tree));
369 static inline void abstract_origin_attribute PARAMS ((tree));
370 #ifdef DWARF_DECL_COORDINATES
371 static inline void src_coords_attribute PARAMS ((unsigned, unsigned));
372 #endif /* defined(DWARF_DECL_COORDINATES) */
373 static inline void pure_or_virtual_attribute PARAMS ((tree));
374 static void name_and_src_coords_attributes PARAMS ((tree));
375 static void type_attribute PARAMS ((tree, int, int));
376 static const char *type_tag PARAMS ((tree));
377 static inline void dienum_push PARAMS ((void));
378 static inline void dienum_pop PARAMS ((void));
379 static inline tree member_declared_type PARAMS ((tree));
380 static const char *function_start_label PARAMS ((tree));
381 static void output_array_type_die PARAMS ((void *));
382 static void output_set_type_die PARAMS ((void *));
384 static void output_entry_point_die PARAMS ((void *));
386 static void output_inlined_enumeration_type_die PARAMS ((void *));
387 static void output_inlined_structure_type_die PARAMS ((void *));
388 static void output_inlined_union_type_die PARAMS ((void *));
389 static void output_enumeration_type_die PARAMS ((void *));
390 static void output_formal_parameter_die PARAMS ((void *));
391 static void output_global_subroutine_die PARAMS ((void *));
392 static void output_global_variable_die PARAMS ((void *));
393 static void output_label_die PARAMS ((void *));
394 static void output_lexical_block_die PARAMS ((void *));
395 static void output_inlined_subroutine_die PARAMS ((void *));
396 static void output_local_variable_die PARAMS ((void *));
397 static void output_member_die PARAMS ((void *));
399 static void output_pointer_type_die PARAMS ((void *));
400 static void output_reference_type_die PARAMS ((void *));
402 static void output_ptr_to_mbr_type_die PARAMS ((void *));
403 static void output_compile_unit_die PARAMS ((void *));
404 static void output_string_type_die PARAMS ((void *));
405 static void output_inheritance_die PARAMS ((void *));
406 static void output_structure_type_die PARAMS ((void *));
407 static void output_local_subroutine_die PARAMS ((void *));
408 static void output_subroutine_type_die PARAMS ((void *));
409 static void output_typedef_die PARAMS ((void *));
410 static void output_union_type_die PARAMS ((void *));
411 static void output_unspecified_parameters_die PARAMS ((void *));
412 static void output_padded_null_die PARAMS ((void *));
413 static void output_die PARAMS ((void (*)(void *), void *));
414 static void end_sibling_chain PARAMS ((void));
415 static void output_formal_types PARAMS ((tree));
416 static void pend_type PARAMS ((tree));
417 static int type_ok_for_scope PARAMS ((tree, tree));
418 static void output_pending_types_for_scope PARAMS ((tree));
419 static void output_type PARAMS ((tree, tree));
420 static void output_tagged_type_instantiation PARAMS ((tree));
421 static void output_block PARAMS ((tree, int));
422 static void output_decls_for_scope PARAMS ((tree, int));
423 static void output_decl PARAMS ((tree, tree));
424 static void shuffle_filename_entry PARAMS ((filename_entry *));
425 static void generate_new_sfname_entry PARAMS ((void));
426 static unsigned lookup_filename PARAMS ((const char *));
427 static void generate_srcinfo_entry PARAMS ((unsigned, unsigned));
428 static void generate_macinfo_entry PARAMS ((const char *, const char *));
429 static int is_pseudo_reg PARAMS ((rtx));
430 static tree type_main_variant PARAMS ((tree));
431 static int is_tagged_type PARAMS ((tree));
432 static int is_redundant_typedef PARAMS ((tree));
433 static void add_incomplete_type PARAMS ((tree));
434 static void retry_incomplete_types PARAMS ((void));
436 /* Definitions of defaults for assembler-dependent names of various
437 pseudo-ops and section names.
439 Theses may be overridden in your tm.h file (if necessary) for your
440 particular assembler. The default values provided here correspond to
441 what is expected by "standard" AT&T System V.4 assemblers. */
444 #define FILE_ASM_OP ".file"
446 #ifndef VERSION_ASM_OP
447 #define VERSION_ASM_OP ".version"
449 #ifndef UNALIGNED_SHORT_ASM_OP
450 #define UNALIGNED_SHORT_ASM_OP ".2byte"
452 #ifndef UNALIGNED_INT_ASM_OP
453 #define UNALIGNED_INT_ASM_OP ".4byte"
456 #define ASM_BYTE_OP ".byte"
459 #define SET_ASM_OP ".set"
462 /* Pseudo-ops for pushing the current section onto the section stack (and
463 simultaneously changing to a new section) and for poping back to the
464 section we were in immediately before this one. Note that most svr4
465 assemblers only maintain a one level stack... you can push all the
466 sections you want, but you can only pop out one level. (The sparc
467 svr4 assembler is an exception to this general rule.) That's
468 OK because we only use at most one level of the section stack herein. */
470 #ifndef PUSHSECTION_ASM_OP
471 #define PUSHSECTION_ASM_OP ".section"
473 #ifndef POPSECTION_ASM_OP
474 #define POPSECTION_ASM_OP ".previous"
477 /* The default format used by the ASM_OUTPUT_PUSH_SECTION macro (see below)
478 to print the PUSHSECTION_ASM_OP and the section name. The default here
479 works for almost all svr4 assemblers, except for the sparc, where the
480 section name must be enclosed in double quotes. (See sparcv4.h.) */
482 #ifndef PUSHSECTION_FORMAT
483 #define PUSHSECTION_FORMAT "\t%s\t%s\n"
486 #ifndef DEBUG_SECTION
487 #define DEBUG_SECTION ".debug"
490 #define LINE_SECTION ".line"
492 #ifndef SFNAMES_SECTION
493 #define SFNAMES_SECTION ".debug_sfnames"
495 #ifndef SRCINFO_SECTION
496 #define SRCINFO_SECTION ".debug_srcinfo"
498 #ifndef MACINFO_SECTION
499 #define MACINFO_SECTION ".debug_macinfo"
501 #ifndef PUBNAMES_SECTION
502 #define PUBNAMES_SECTION ".debug_pubnames"
504 #ifndef ARANGES_SECTION
505 #define ARANGES_SECTION ".debug_aranges"
508 #define TEXT_SECTION ".text"
511 #define DATA_SECTION ".data"
513 #ifndef DATA1_SECTION
514 #define DATA1_SECTION ".data1"
516 #ifndef RODATA_SECTION
517 #define RODATA_SECTION ".rodata"
519 #ifndef RODATA1_SECTION
520 #define RODATA1_SECTION ".rodata1"
523 #define BSS_SECTION ".bss"
526 /* Definitions of defaults for formats and names of various special
527 (artificial) labels which may be generated within this file (when
528 the -g options is used and DWARF_DEBUGGING_INFO is in effect.
530 If necessary, these may be overridden from within your tm.h file,
531 but typically, you should never need to override these.
533 These labels have been hacked (temporarily) so that they all begin with
534 a `.L' sequence so as to appease the stock sparc/svr4 assembler and the
535 stock m88k/svr4 assembler, both of which need to see .L at the start of
536 a label in order to prevent that label from going into the linker symbol
537 table). When I get time, I'll have to fix this the right way so that we
538 will use ASM_GENERATE_INTERNAL_LABEL and ASM_OUTPUT_INTERNAL_LABEL herein,
539 but that will require a rather massive set of changes. For the moment,
540 the following definitions out to produce the right results for all svr4
541 and svr3 assemblers. -- rfg
544 #ifndef TEXT_BEGIN_LABEL
545 #define TEXT_BEGIN_LABEL "*.L_text_b"
547 #ifndef TEXT_END_LABEL
548 #define TEXT_END_LABEL "*.L_text_e"
551 #ifndef DATA_BEGIN_LABEL
552 #define DATA_BEGIN_LABEL "*.L_data_b"
554 #ifndef DATA_END_LABEL
555 #define DATA_END_LABEL "*.L_data_e"
558 #ifndef DATA1_BEGIN_LABEL
559 #define DATA1_BEGIN_LABEL "*.L_data1_b"
561 #ifndef DATA1_END_LABEL
562 #define DATA1_END_LABEL "*.L_data1_e"
565 #ifndef RODATA_BEGIN_LABEL
566 #define RODATA_BEGIN_LABEL "*.L_rodata_b"
568 #ifndef RODATA_END_LABEL
569 #define RODATA_END_LABEL "*.L_rodata_e"
572 #ifndef RODATA1_BEGIN_LABEL
573 #define RODATA1_BEGIN_LABEL "*.L_rodata1_b"
575 #ifndef RODATA1_END_LABEL
576 #define RODATA1_END_LABEL "*.L_rodata1_e"
579 #ifndef BSS_BEGIN_LABEL
580 #define BSS_BEGIN_LABEL "*.L_bss_b"
582 #ifndef BSS_END_LABEL
583 #define BSS_END_LABEL "*.L_bss_e"
586 #ifndef LINE_BEGIN_LABEL
587 #define LINE_BEGIN_LABEL "*.L_line_b"
589 #ifndef LINE_LAST_ENTRY_LABEL
590 #define LINE_LAST_ENTRY_LABEL "*.L_line_last"
592 #ifndef LINE_END_LABEL
593 #define LINE_END_LABEL "*.L_line_e"
596 #ifndef DEBUG_BEGIN_LABEL
597 #define DEBUG_BEGIN_LABEL "*.L_debug_b"
599 #ifndef SFNAMES_BEGIN_LABEL
600 #define SFNAMES_BEGIN_LABEL "*.L_sfnames_b"
602 #ifndef SRCINFO_BEGIN_LABEL
603 #define SRCINFO_BEGIN_LABEL "*.L_srcinfo_b"
605 #ifndef MACINFO_BEGIN_LABEL
606 #define MACINFO_BEGIN_LABEL "*.L_macinfo_b"
609 #ifndef DIE_BEGIN_LABEL_FMT
610 #define DIE_BEGIN_LABEL_FMT "*.L_D%u"
612 #ifndef DIE_END_LABEL_FMT
613 #define DIE_END_LABEL_FMT "*.L_D%u_e"
615 #ifndef PUB_DIE_LABEL_FMT
616 #define PUB_DIE_LABEL_FMT "*.L_P%u"
618 #ifndef INSN_LABEL_FMT
619 #define INSN_LABEL_FMT "*.L_I%u_%u"
621 #ifndef BLOCK_BEGIN_LABEL_FMT
622 #define BLOCK_BEGIN_LABEL_FMT "*.L_B%u"
624 #ifndef BLOCK_END_LABEL_FMT
625 #define BLOCK_END_LABEL_FMT "*.L_B%u_e"
627 #ifndef SS_BEGIN_LABEL_FMT
628 #define SS_BEGIN_LABEL_FMT "*.L_s%u"
630 #ifndef SS_END_LABEL_FMT
631 #define SS_END_LABEL_FMT "*.L_s%u_e"
633 #ifndef EE_BEGIN_LABEL_FMT
634 #define EE_BEGIN_LABEL_FMT "*.L_e%u"
636 #ifndef EE_END_LABEL_FMT
637 #define EE_END_LABEL_FMT "*.L_e%u_e"
639 #ifndef MT_BEGIN_LABEL_FMT
640 #define MT_BEGIN_LABEL_FMT "*.L_t%u"
642 #ifndef MT_END_LABEL_FMT
643 #define MT_END_LABEL_FMT "*.L_t%u_e"
645 #ifndef LOC_BEGIN_LABEL_FMT
646 #define LOC_BEGIN_LABEL_FMT "*.L_l%u"
648 #ifndef LOC_END_LABEL_FMT
649 #define LOC_END_LABEL_FMT "*.L_l%u_e"
651 #ifndef BOUND_BEGIN_LABEL_FMT
652 #define BOUND_BEGIN_LABEL_FMT "*.L_b%u_%u_%c"
654 #ifndef BOUND_END_LABEL_FMT
655 #define BOUND_END_LABEL_FMT "*.L_b%u_%u_%c_e"
657 #ifndef DERIV_BEGIN_LABEL_FMT
658 #define DERIV_BEGIN_LABEL_FMT "*.L_d%u"
660 #ifndef DERIV_END_LABEL_FMT
661 #define DERIV_END_LABEL_FMT "*.L_d%u_e"
663 #ifndef SL_BEGIN_LABEL_FMT
664 #define SL_BEGIN_LABEL_FMT "*.L_sl%u"
666 #ifndef SL_END_LABEL_FMT
667 #define SL_END_LABEL_FMT "*.L_sl%u_e"
669 #ifndef BODY_BEGIN_LABEL_FMT
670 #define BODY_BEGIN_LABEL_FMT "*.L_b%u"
672 #ifndef BODY_END_LABEL_FMT
673 #define BODY_END_LABEL_FMT "*.L_b%u_e"
675 #ifndef FUNC_END_LABEL_FMT
676 #define FUNC_END_LABEL_FMT "*.L_f%u_e"
678 #ifndef TYPE_NAME_FMT
679 #define TYPE_NAME_FMT "*.L_T%u"
681 #ifndef DECL_NAME_FMT
682 #define DECL_NAME_FMT "*.L_E%u"
684 #ifndef LINE_CODE_LABEL_FMT
685 #define LINE_CODE_LABEL_FMT "*.L_LC%u"
687 #ifndef SFNAMES_ENTRY_LABEL_FMT
688 #define SFNAMES_ENTRY_LABEL_FMT "*.L_F%u"
690 #ifndef LINE_ENTRY_LABEL_FMT
691 #define LINE_ENTRY_LABEL_FMT "*.L_LE%u"
694 /* Definitions of defaults for various types of primitive assembly language
697 If necessary, these may be overridden from within your tm.h file,
698 but typically, you shouldn't need to override these. */
700 #ifndef ASM_OUTPUT_PUSH_SECTION
701 #define ASM_OUTPUT_PUSH_SECTION(FILE, SECTION) \
702 fprintf ((FILE), PUSHSECTION_FORMAT, PUSHSECTION_ASM_OP, SECTION)
705 #ifndef ASM_OUTPUT_POP_SECTION
706 #define ASM_OUTPUT_POP_SECTION(FILE) \
707 fprintf ((FILE), "\t%s\n", POPSECTION_ASM_OP)
710 #ifndef ASM_OUTPUT_DWARF_DELTA2
711 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
712 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
713 assemble_name (FILE, LABEL1); \
714 fprintf (FILE, "-"); \
715 assemble_name (FILE, LABEL2); \
716 fprintf (FILE, "\n"); \
720 #ifndef ASM_OUTPUT_DWARF_DELTA4
721 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
722 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
723 assemble_name (FILE, LABEL1); \
724 fprintf (FILE, "-"); \
725 assemble_name (FILE, LABEL2); \
726 fprintf (FILE, "\n"); \
730 #ifndef ASM_OUTPUT_DWARF_TAG
731 #define ASM_OUTPUT_DWARF_TAG(FILE,TAG) \
733 fprintf ((FILE), "\t%s\t0x%x", \
734 UNALIGNED_SHORT_ASM_OP, (unsigned) TAG); \
735 if (flag_debug_asm) \
736 fprintf ((FILE), "\t%s %s", \
737 ASM_COMMENT_START, dwarf_tag_name (TAG)); \
738 fputc ('\n', (FILE)); \
742 #ifndef ASM_OUTPUT_DWARF_ATTRIBUTE
743 #define ASM_OUTPUT_DWARF_ATTRIBUTE(FILE,ATTR) \
745 fprintf ((FILE), "\t%s\t0x%x", \
746 UNALIGNED_SHORT_ASM_OP, (unsigned) ATTR); \
747 if (flag_debug_asm) \
748 fprintf ((FILE), "\t%s %s", \
749 ASM_COMMENT_START, dwarf_attr_name (ATTR)); \
750 fputc ('\n', (FILE)); \
754 #ifndef ASM_OUTPUT_DWARF_STACK_OP
755 #define ASM_OUTPUT_DWARF_STACK_OP(FILE,OP) \
757 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) OP); \
758 if (flag_debug_asm) \
759 fprintf ((FILE), "\t%s %s", \
760 ASM_COMMENT_START, dwarf_stack_op_name (OP)); \
761 fputc ('\n', (FILE)); \
765 #ifndef ASM_OUTPUT_DWARF_FUND_TYPE
766 #define ASM_OUTPUT_DWARF_FUND_TYPE(FILE,FT) \
768 fprintf ((FILE), "\t%s\t0x%x", \
769 UNALIGNED_SHORT_ASM_OP, (unsigned) FT); \
770 if (flag_debug_asm) \
771 fprintf ((FILE), "\t%s %s", \
772 ASM_COMMENT_START, dwarf_fund_type_name (FT)); \
773 fputc ('\n', (FILE)); \
777 #ifndef ASM_OUTPUT_DWARF_FMT_BYTE
778 #define ASM_OUTPUT_DWARF_FMT_BYTE(FILE,FMT) \
780 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) FMT); \
781 if (flag_debug_asm) \
782 fprintf ((FILE), "\t%s %s", \
783 ASM_COMMENT_START, dwarf_fmt_byte_name (FMT)); \
784 fputc ('\n', (FILE)); \
788 #ifndef ASM_OUTPUT_DWARF_TYPE_MODIFIER
789 #define ASM_OUTPUT_DWARF_TYPE_MODIFIER(FILE,MOD) \
791 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) MOD); \
792 if (flag_debug_asm) \
793 fprintf ((FILE), "\t%s %s", \
794 ASM_COMMENT_START, dwarf_typemod_name (MOD)); \
795 fputc ('\n', (FILE)); \
799 #ifndef ASM_OUTPUT_DWARF_ADDR
800 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
801 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
802 assemble_name (FILE, LABEL); \
803 fprintf (FILE, "\n"); \
807 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
808 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX) \
810 fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
811 output_addr_const ((FILE), (RTX)); \
812 fputc ('\n', (FILE)); \
816 #ifndef ASM_OUTPUT_DWARF_REF
817 #define ASM_OUTPUT_DWARF_REF(FILE,LABEL) \
818 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
819 assemble_name (FILE, LABEL); \
820 fprintf (FILE, "\n"); \
824 #ifndef ASM_OUTPUT_DWARF_DATA1
825 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
826 fprintf ((FILE), "\t%s\t0x%x\n", ASM_BYTE_OP, VALUE)
829 #ifndef ASM_OUTPUT_DWARF_DATA2
830 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
831 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
834 #ifndef ASM_OUTPUT_DWARF_DATA4
835 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
836 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
839 #ifndef ASM_OUTPUT_DWARF_DATA8
840 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
842 if (WORDS_BIG_ENDIAN) \
844 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
845 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
849 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
850 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
855 /* ASM_OUTPUT_DWARF_STRING is defined to output an ascii string, but to
856 NOT issue a trailing newline. We define ASM_OUTPUT_DWARF_STRING_NEWLINE
857 based on whether ASM_OUTPUT_DWARF_STRING is defined or not. If it is
858 defined, we call it, then issue the line feed. If not, we supply a
859 default defintion of calling ASM_OUTPUT_ASCII */
861 #ifndef ASM_OUTPUT_DWARF_STRING
862 #define ASM_OUTPUT_DWARF_STRING_NEWLINE(FILE,P) \
863 ASM_OUTPUT_ASCII ((FILE), P, strlen (P)+1)
865 #define ASM_OUTPUT_DWARF_STRING_NEWLINE(FILE,P) \
866 ASM_OUTPUT_DWARF_STRING (FILE,P), ASM_OUTPUT_DWARF_STRING (FILE,"\n")
870 /************************ general utility functions **************************/
876 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
877 || ((GET_CODE (rtl) == SUBREG)
878 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
882 type_main_variant (type)
885 type = TYPE_MAIN_VARIANT (type);
887 /* There really should be only one main variant among any group of variants
888 of a given type (and all of the MAIN_VARIANT values for all members of
889 the group should point to that one type) but sometimes the C front-end
890 messes this up for array types, so we work around that bug here. */
892 if (TREE_CODE (type) == ARRAY_TYPE)
894 while (type != TYPE_MAIN_VARIANT (type))
895 type = TYPE_MAIN_VARIANT (type);
901 /* Return non-zero if the given type node represents a tagged type. */
904 is_tagged_type (type)
907 register enum tree_code code = TREE_CODE (type);
909 return (code == RECORD_TYPE || code == UNION_TYPE
910 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
915 register unsigned tag;
919 case TAG_padding: return "TAG_padding";
920 case TAG_array_type: return "TAG_array_type";
921 case TAG_class_type: return "TAG_class_type";
922 case TAG_entry_point: return "TAG_entry_point";
923 case TAG_enumeration_type: return "TAG_enumeration_type";
924 case TAG_formal_parameter: return "TAG_formal_parameter";
925 case TAG_global_subroutine: return "TAG_global_subroutine";
926 case TAG_global_variable: return "TAG_global_variable";
927 case TAG_label: return "TAG_label";
928 case TAG_lexical_block: return "TAG_lexical_block";
929 case TAG_local_variable: return "TAG_local_variable";
930 case TAG_member: return "TAG_member";
931 case TAG_pointer_type: return "TAG_pointer_type";
932 case TAG_reference_type: return "TAG_reference_type";
933 case TAG_compile_unit: return "TAG_compile_unit";
934 case TAG_string_type: return "TAG_string_type";
935 case TAG_structure_type: return "TAG_structure_type";
936 case TAG_subroutine: return "TAG_subroutine";
937 case TAG_subroutine_type: return "TAG_subroutine_type";
938 case TAG_typedef: return "TAG_typedef";
939 case TAG_union_type: return "TAG_union_type";
940 case TAG_unspecified_parameters: return "TAG_unspecified_parameters";
941 case TAG_variant: return "TAG_variant";
942 case TAG_common_block: return "TAG_common_block";
943 case TAG_common_inclusion: return "TAG_common_inclusion";
944 case TAG_inheritance: return "TAG_inheritance";
945 case TAG_inlined_subroutine: return "TAG_inlined_subroutine";
946 case TAG_module: return "TAG_module";
947 case TAG_ptr_to_member_type: return "TAG_ptr_to_member_type";
948 case TAG_set_type: return "TAG_set_type";
949 case TAG_subrange_type: return "TAG_subrange_type";
950 case TAG_with_stmt: return "TAG_with_stmt";
952 /* GNU extensions. */
954 case TAG_format_label: return "TAG_format_label";
955 case TAG_namelist: return "TAG_namelist";
956 case TAG_function_template: return "TAG_function_template";
957 case TAG_class_template: return "TAG_class_template";
959 default: return "TAG_<unknown>";
964 dwarf_attr_name (attr)
965 register unsigned attr;
969 case AT_sibling: return "AT_sibling";
970 case AT_location: return "AT_location";
971 case AT_name: return "AT_name";
972 case AT_fund_type: return "AT_fund_type";
973 case AT_mod_fund_type: return "AT_mod_fund_type";
974 case AT_user_def_type: return "AT_user_def_type";
975 case AT_mod_u_d_type: return "AT_mod_u_d_type";
976 case AT_ordering: return "AT_ordering";
977 case AT_subscr_data: return "AT_subscr_data";
978 case AT_byte_size: return "AT_byte_size";
979 case AT_bit_offset: return "AT_bit_offset";
980 case AT_bit_size: return "AT_bit_size";
981 case AT_element_list: return "AT_element_list";
982 case AT_stmt_list: return "AT_stmt_list";
983 case AT_low_pc: return "AT_low_pc";
984 case AT_high_pc: return "AT_high_pc";
985 case AT_language: return "AT_language";
986 case AT_member: return "AT_member";
987 case AT_discr: return "AT_discr";
988 case AT_discr_value: return "AT_discr_value";
989 case AT_string_length: return "AT_string_length";
990 case AT_common_reference: return "AT_common_reference";
991 case AT_comp_dir: return "AT_comp_dir";
992 case AT_const_value_string: return "AT_const_value_string";
993 case AT_const_value_data2: return "AT_const_value_data2";
994 case AT_const_value_data4: return "AT_const_value_data4";
995 case AT_const_value_data8: return "AT_const_value_data8";
996 case AT_const_value_block2: return "AT_const_value_block2";
997 case AT_const_value_block4: return "AT_const_value_block4";
998 case AT_containing_type: return "AT_containing_type";
999 case AT_default_value_addr: return "AT_default_value_addr";
1000 case AT_default_value_data2: return "AT_default_value_data2";
1001 case AT_default_value_data4: return "AT_default_value_data4";
1002 case AT_default_value_data8: return "AT_default_value_data8";
1003 case AT_default_value_string: return "AT_default_value_string";
1004 case AT_friends: return "AT_friends";
1005 case AT_inline: return "AT_inline";
1006 case AT_is_optional: return "AT_is_optional";
1007 case AT_lower_bound_ref: return "AT_lower_bound_ref";
1008 case AT_lower_bound_data2: return "AT_lower_bound_data2";
1009 case AT_lower_bound_data4: return "AT_lower_bound_data4";
1010 case AT_lower_bound_data8: return "AT_lower_bound_data8";
1011 case AT_private: return "AT_private";
1012 case AT_producer: return "AT_producer";
1013 case AT_program: return "AT_program";
1014 case AT_protected: return "AT_protected";
1015 case AT_prototyped: return "AT_prototyped";
1016 case AT_public: return "AT_public";
1017 case AT_pure_virtual: return "AT_pure_virtual";
1018 case AT_return_addr: return "AT_return_addr";
1019 case AT_abstract_origin: return "AT_abstract_origin";
1020 case AT_start_scope: return "AT_start_scope";
1021 case AT_stride_size: return "AT_stride_size";
1022 case AT_upper_bound_ref: return "AT_upper_bound_ref";
1023 case AT_upper_bound_data2: return "AT_upper_bound_data2";
1024 case AT_upper_bound_data4: return "AT_upper_bound_data4";
1025 case AT_upper_bound_data8: return "AT_upper_bound_data8";
1026 case AT_virtual: return "AT_virtual";
1028 /* GNU extensions */
1030 case AT_sf_names: return "AT_sf_names";
1031 case AT_src_info: return "AT_src_info";
1032 case AT_mac_info: return "AT_mac_info";
1033 case AT_src_coords: return "AT_src_coords";
1034 case AT_body_begin: return "AT_body_begin";
1035 case AT_body_end: return "AT_body_end";
1037 default: return "AT_<unknown>";
1042 dwarf_stack_op_name (op)
1043 register unsigned op;
1047 case OP_REG: return "OP_REG";
1048 case OP_BASEREG: return "OP_BASEREG";
1049 case OP_ADDR: return "OP_ADDR";
1050 case OP_CONST: return "OP_CONST";
1051 case OP_DEREF2: return "OP_DEREF2";
1052 case OP_DEREF4: return "OP_DEREF4";
1053 case OP_ADD: return "OP_ADD";
1054 default: return "OP_<unknown>";
1059 dwarf_typemod_name (mod)
1060 register unsigned mod;
1064 case MOD_pointer_to: return "MOD_pointer_to";
1065 case MOD_reference_to: return "MOD_reference_to";
1066 case MOD_const: return "MOD_const";
1067 case MOD_volatile: return "MOD_volatile";
1068 default: return "MOD_<unknown>";
1073 dwarf_fmt_byte_name (fmt)
1074 register unsigned fmt;
1078 case FMT_FT_C_C: return "FMT_FT_C_C";
1079 case FMT_FT_C_X: return "FMT_FT_C_X";
1080 case FMT_FT_X_C: return "FMT_FT_X_C";
1081 case FMT_FT_X_X: return "FMT_FT_X_X";
1082 case FMT_UT_C_C: return "FMT_UT_C_C";
1083 case FMT_UT_C_X: return "FMT_UT_C_X";
1084 case FMT_UT_X_C: return "FMT_UT_X_C";
1085 case FMT_UT_X_X: return "FMT_UT_X_X";
1086 case FMT_ET: return "FMT_ET";
1087 default: return "FMT_<unknown>";
1092 dwarf_fund_type_name (ft)
1093 register unsigned ft;
1097 case FT_char: return "FT_char";
1098 case FT_signed_char: return "FT_signed_char";
1099 case FT_unsigned_char: return "FT_unsigned_char";
1100 case FT_short: return "FT_short";
1101 case FT_signed_short: return "FT_signed_short";
1102 case FT_unsigned_short: return "FT_unsigned_short";
1103 case FT_integer: return "FT_integer";
1104 case FT_signed_integer: return "FT_signed_integer";
1105 case FT_unsigned_integer: return "FT_unsigned_integer";
1106 case FT_long: return "FT_long";
1107 case FT_signed_long: return "FT_signed_long";
1108 case FT_unsigned_long: return "FT_unsigned_long";
1109 case FT_pointer: return "FT_pointer";
1110 case FT_float: return "FT_float";
1111 case FT_dbl_prec_float: return "FT_dbl_prec_float";
1112 case FT_ext_prec_float: return "FT_ext_prec_float";
1113 case FT_complex: return "FT_complex";
1114 case FT_dbl_prec_complex: return "FT_dbl_prec_complex";
1115 case FT_void: return "FT_void";
1116 case FT_boolean: return "FT_boolean";
1117 case FT_ext_prec_complex: return "FT_ext_prec_complex";
1118 case FT_label: return "FT_label";
1120 /* GNU extensions. */
1122 case FT_long_long: return "FT_long_long";
1123 case FT_signed_long_long: return "FT_signed_long_long";
1124 case FT_unsigned_long_long: return "FT_unsigned_long_long";
1126 case FT_int8: return "FT_int8";
1127 case FT_signed_int8: return "FT_signed_int8";
1128 case FT_unsigned_int8: return "FT_unsigned_int8";
1129 case FT_int16: return "FT_int16";
1130 case FT_signed_int16: return "FT_signed_int16";
1131 case FT_unsigned_int16: return "FT_unsigned_int16";
1132 case FT_int32: return "FT_int32";
1133 case FT_signed_int32: return "FT_signed_int32";
1134 case FT_unsigned_int32: return "FT_unsigned_int32";
1135 case FT_int64: return "FT_int64";
1136 case FT_signed_int64: return "FT_signed_int64";
1137 case FT_unsigned_int64: return "FT_unsigned_int64";
1139 case FT_real32: return "FT_real32";
1140 case FT_real64: return "FT_real64";
1141 case FT_real96: return "FT_real96";
1142 case FT_real128: return "FT_real128";
1144 default: return "FT_<unknown>";
1148 /* Determine the "ultimate origin" of a decl. The decl may be an
1149 inlined instance of an inlined instance of a decl which is local
1150 to an inline function, so we have to trace all of the way back
1151 through the origin chain to find out what sort of node actually
1152 served as the original seed for the given block. */
1155 decl_ultimate_origin (decl)
1158 #ifdef ENABLE_CHECKING
1159 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
1160 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
1161 most distant ancestor, this should never happen. */
1165 return DECL_ABSTRACT_ORIGIN (decl);
1168 /* Determine the "ultimate origin" of a block. The block may be an
1169 inlined instance of an inlined instance of a block which is local
1170 to an inline function, so we have to trace all of the way back
1171 through the origin chain to find out what sort of node actually
1172 served as the original seed for the given block. */
1175 block_ultimate_origin (block)
1176 register tree block;
1178 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
1180 if (immediate_origin == NULL)
1184 register tree ret_val;
1185 register tree lookahead = immediate_origin;
1189 ret_val = lookahead;
1190 lookahead = (TREE_CODE (ret_val) == BLOCK)
1191 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
1194 while (lookahead != NULL && lookahead != ret_val);
1199 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
1200 of a virtual function may refer to a base class, so we check the 'this'
1204 decl_class_context (decl)
1207 tree context = NULL_TREE;
1208 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
1209 context = DECL_CONTEXT (decl);
1211 context = TYPE_MAIN_VARIANT
1212 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
1214 if (context && !TYPE_P (context))
1215 context = NULL_TREE;
1222 output_unsigned_leb128 (value)
1223 register unsigned long value;
1225 register unsigned long orig_value = value;
1229 register unsigned byte = (value & 0x7f);
1232 if (value != 0) /* more bytes to follow */
1234 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) byte);
1235 if (flag_debug_asm && value == 0)
1236 fprintf (asm_out_file, "\t%s ULEB128 number - value = %lu",
1237 ASM_COMMENT_START, orig_value);
1238 fputc ('\n', asm_out_file);
1244 output_signed_leb128 (value)
1245 register long value;
1247 register long orig_value = value;
1248 register int negative = (value < 0);
1253 register unsigned byte = (value & 0x7f);
1257 value |= 0xfe000000; /* manually sign extend */
1258 if (((value == 0) && ((byte & 0x40) == 0))
1259 || ((value == -1) && ((byte & 0x40) == 1)))
1266 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) byte);
1267 if (flag_debug_asm && more == 0)
1268 fprintf (asm_out_file, "\t%s SLEB128 number - value = %ld",
1269 ASM_COMMENT_START, orig_value);
1270 fputc ('\n', asm_out_file);
1276 /**************** utility functions for attribute functions ******************/
1278 /* Given a pointer to a tree node for some type, return a Dwarf fundamental
1279 type code for the given type.
1281 This routine must only be called for GCC type nodes that correspond to
1282 Dwarf fundamental types.
1284 The current Dwarf draft specification calls for Dwarf fundamental types
1285 to accurately reflect the fact that a given type was either a "plain"
1286 integral type or an explicitly "signed" integral type. Unfortunately,
1287 we can't always do this, because GCC may already have thrown away the
1288 information about the precise way in which the type was originally
1291 typedef signed int my_type;
1293 struct s { my_type f; };
1295 Since we may be stuck here without enought information to do exactly
1296 what is called for in the Dwarf draft specification, we do the best
1297 that we can under the circumstances and always use the "plain" integral
1298 fundamental type codes for int, short, and long types. That's probably
1299 good enough. The additional accuracy called for in the current DWARF
1300 draft specification is probably never even useful in practice. */
1303 fundamental_type_code (type)
1306 if (TREE_CODE (type) == ERROR_MARK)
1309 switch (TREE_CODE (type))
1318 /* Carefully distinguish all the standard types of C,
1319 without messing up if the language is not C.
1320 Note that we check only for the names that contain spaces;
1321 other names might occur by coincidence in other languages. */
1322 if (TYPE_NAME (type) != 0
1323 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1324 && DECL_NAME (TYPE_NAME (type)) != 0
1325 && TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
1328 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
1330 if (!strcmp (name, "unsigned char"))
1331 return FT_unsigned_char;
1332 if (!strcmp (name, "signed char"))
1333 return FT_signed_char;
1334 if (!strcmp (name, "unsigned int"))
1335 return FT_unsigned_integer;
1336 if (!strcmp (name, "short int"))
1338 if (!strcmp (name, "short unsigned int"))
1339 return FT_unsigned_short;
1340 if (!strcmp (name, "long int"))
1342 if (!strcmp (name, "long unsigned int"))
1343 return FT_unsigned_long;
1344 if (!strcmp (name, "long long int"))
1345 return FT_long_long; /* Not grok'ed by svr4 SDB */
1346 if (!strcmp (name, "long long unsigned int"))
1347 return FT_unsigned_long_long; /* Not grok'ed by svr4 SDB */
1350 /* Most integer types will be sorted out above, however, for the
1351 sake of special `array index' integer types, the following code
1352 is also provided. */
1354 if (TYPE_PRECISION (type) == INT_TYPE_SIZE)
1355 return (TREE_UNSIGNED (type) ? FT_unsigned_integer : FT_integer);
1357 if (TYPE_PRECISION (type) == LONG_TYPE_SIZE)
1358 return (TREE_UNSIGNED (type) ? FT_unsigned_long : FT_long);
1360 if (TYPE_PRECISION (type) == LONG_LONG_TYPE_SIZE)
1361 return (TREE_UNSIGNED (type) ? FT_unsigned_long_long : FT_long_long);
1363 if (TYPE_PRECISION (type) == SHORT_TYPE_SIZE)
1364 return (TREE_UNSIGNED (type) ? FT_unsigned_short : FT_short);
1366 if (TYPE_PRECISION (type) == CHAR_TYPE_SIZE)
1367 return (TREE_UNSIGNED (type) ? FT_unsigned_char : FT_char);
1369 /* In C++, __java_boolean is an INTEGER_TYPE with precision == 1 */
1370 if (TYPE_PRECISION (type) == 1)
1376 /* Carefully distinguish all the standard types of C,
1377 without messing up if the language is not C. */
1378 if (TYPE_NAME (type) != 0
1379 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1380 && DECL_NAME (TYPE_NAME (type)) != 0
1381 && TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
1384 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
1386 /* Note that here we can run afowl of a serious bug in "classic"
1387 svr4 SDB debuggers. They don't seem to understand the
1388 FT_ext_prec_float type (even though they should). */
1390 if (!strcmp (name, "long double"))
1391 return FT_ext_prec_float;
1394 if (TYPE_PRECISION (type) == DOUBLE_TYPE_SIZE)
1396 /* On the SH, when compiling with -m3e or -m4-single-only, both
1397 float and double are 32 bits. But since the debugger doesn't
1398 know about the subtarget, it always thinks double is 64 bits.
1399 So we have to tell the debugger that the type is float to
1400 make the output of the 'print' command etc. readable. */
1401 if (DOUBLE_TYPE_SIZE == FLOAT_TYPE_SIZE && FLOAT_TYPE_SIZE == 32)
1403 return FT_dbl_prec_float;
1405 if (TYPE_PRECISION (type) == FLOAT_TYPE_SIZE)
1408 /* Note that here we can run afowl of a serious bug in "classic"
1409 svr4 SDB debuggers. They don't seem to understand the
1410 FT_ext_prec_float type (even though they should). */
1412 if (TYPE_PRECISION (type) == LONG_DOUBLE_TYPE_SIZE)
1413 return FT_ext_prec_float;
1417 return FT_complex; /* GNU FORTRAN COMPLEX type. */
1420 return FT_char; /* GNU Pascal CHAR type. Not used in C. */
1423 return FT_boolean; /* GNU FORTRAN BOOLEAN type. */
1426 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
1431 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
1432 the Dwarf "root" type for the given input type. The Dwarf "root" type
1433 of a given type is generally the same as the given type, except that if
1434 the given type is a pointer or reference type, then the root type of
1435 the given type is the root type of the "basis" type for the pointer or
1436 reference type. (This definition of the "root" type is recursive.)
1437 Also, the root type of a `const' qualified type or a `volatile'
1438 qualified type is the root type of the given type without the
1442 root_type_1 (type, count)
1446 /* Give up after searching 1000 levels, in case this is a recursive
1447 pointer type. Such types are possible in Ada, but it is not possible
1448 to represent them in DWARF1 debug info. */
1450 return error_mark_node;
1452 switch (TREE_CODE (type))
1455 return error_mark_node;
1458 case REFERENCE_TYPE:
1459 return root_type_1 (TREE_TYPE (type), count+1);
1470 type = root_type_1 (type, 0);
1471 if (type != error_mark_node)
1472 type = type_main_variant (type);
1476 /* Given a pointer to an arbitrary ..._TYPE tree node, write out a sequence
1477 of zero or more Dwarf "type-modifier" bytes applicable to the type. */
1480 write_modifier_bytes_1 (type, decl_const, decl_volatile, count)
1482 register int decl_const;
1483 register int decl_volatile;
1486 if (TREE_CODE (type) == ERROR_MARK)
1489 /* Give up after searching 1000 levels, in case this is a recursive
1490 pointer type. Such types are possible in Ada, but it is not possible
1491 to represent them in DWARF1 debug info. */
1495 if (TYPE_READONLY (type) || decl_const)
1496 ASM_OUTPUT_DWARF_TYPE_MODIFIER (asm_out_file, MOD_const);
1497 if (TYPE_VOLATILE (type) || decl_volatile)
1498 ASM_OUTPUT_DWARF_TYPE_MODIFIER (asm_out_file, MOD_volatile);
1499 switch (TREE_CODE (type))
1502 ASM_OUTPUT_DWARF_TYPE_MODIFIER (asm_out_file, MOD_pointer_to);
1503 write_modifier_bytes_1 (TREE_TYPE (type), 0, 0, count+1);
1506 case REFERENCE_TYPE:
1507 ASM_OUTPUT_DWARF_TYPE_MODIFIER (asm_out_file, MOD_reference_to);
1508 write_modifier_bytes_1 (TREE_TYPE (type), 0, 0, count+1);
1518 write_modifier_bytes (type, decl_const, decl_volatile)
1520 register int decl_const;
1521 register int decl_volatile;
1523 write_modifier_bytes_1 (type, decl_const, decl_volatile, 0);
1526 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
1527 given input type is a Dwarf "fundamental" type. Otherwise return zero. */
1530 type_is_fundamental (type)
1533 switch (TREE_CODE (type))
1548 case QUAL_UNION_TYPE:
1553 case REFERENCE_TYPE:
1565 /* Given a pointer to some ..._DECL tree node, generate an assembly language
1566 equate directive which will associate a symbolic name with the current DIE.
1568 The name used is an artificial label generated from the DECL_UID number
1569 associated with the given decl node. The name it gets equated to is the
1570 symbolic label that we (previously) output at the start of the DIE that
1571 we are currently generating.
1573 Calling this function while generating some "decl related" form of DIE
1574 makes it possible to later refer to the DIE which represents the given
1575 decl simply by re-generating the symbolic name from the ..._DECL node's
1579 equate_decl_number_to_die_number (decl)
1582 /* In the case where we are generating a DIE for some ..._DECL node
1583 which represents either some inline function declaration or some
1584 entity declared within an inline function declaration/definition,
1585 setup a symbolic name for the current DIE so that we have a name
1586 for this DIE that we can easily refer to later on within
1587 AT_abstract_origin attributes. */
1589 char decl_label[MAX_ARTIFICIAL_LABEL_BYTES];
1590 char die_label[MAX_ARTIFICIAL_LABEL_BYTES];
1592 sprintf (decl_label, DECL_NAME_FMT, DECL_UID (decl));
1593 sprintf (die_label, DIE_BEGIN_LABEL_FMT, current_dienum);
1594 ASM_OUTPUT_DEF (asm_out_file, decl_label, die_label);
1597 /* Given a pointer to some ..._TYPE tree node, generate an assembly language
1598 equate directive which will associate a symbolic name with the current DIE.
1600 The name used is an artificial label generated from the TYPE_UID number
1601 associated with the given type node. The name it gets equated to is the
1602 symbolic label that we (previously) output at the start of the DIE that
1603 we are currently generating.
1605 Calling this function while generating some "type related" form of DIE
1606 makes it easy to later refer to the DIE which represents the given type
1607 simply by re-generating the alternative name from the ..._TYPE node's
1611 equate_type_number_to_die_number (type)
1614 char type_label[MAX_ARTIFICIAL_LABEL_BYTES];
1615 char die_label[MAX_ARTIFICIAL_LABEL_BYTES];
1617 /* We are generating a DIE to represent the main variant of this type
1618 (i.e the type without any const or volatile qualifiers) so in order
1619 to get the equate to come out right, we need to get the main variant
1622 type = type_main_variant (type);
1624 sprintf (type_label, TYPE_NAME_FMT, TYPE_UID (type));
1625 sprintf (die_label, DIE_BEGIN_LABEL_FMT, current_dienum);
1626 ASM_OUTPUT_DEF (asm_out_file, type_label, die_label);
1630 output_reg_number (rtl)
1633 register unsigned regno = REGNO (rtl);
1635 if (regno >= DWARF_FRAME_REGISTERS)
1637 warning_with_decl (dwarf_last_decl, "internal regno botch: regno = %d\n",
1641 fprintf (asm_out_file, "\t%s\t0x%x",
1642 UNALIGNED_INT_ASM_OP, DBX_REGISTER_NUMBER (regno));
1645 fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
1646 PRINT_REG (rtl, 0, asm_out_file);
1648 fputc ('\n', asm_out_file);
1651 /* The following routine is a nice and simple transducer. It converts the
1652 RTL for a variable or parameter (resident in memory) into an equivalent
1653 Dwarf representation of a mechanism for getting the address of that same
1654 variable onto the top of a hypothetical "address evaluation" stack.
1656 When creating memory location descriptors, we are effectively trans-
1657 forming the RTL for a memory-resident object into its Dwarf postfix
1658 expression equivalent. This routine just recursively descends an
1659 RTL tree, turning it into Dwarf postfix code as it goes. */
1662 output_mem_loc_descriptor (rtl)
1665 /* Note that for a dynamically sized array, the location we will
1666 generate a description of here will be the lowest numbered location
1667 which is actually within the array. That's *not* necessarily the
1668 same as the zeroth element of the array. */
1670 #ifdef ASM_SIMPLIFY_DWARF_ADDR
1671 rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl);
1674 switch (GET_CODE (rtl))
1678 /* The case of a subreg may arise when we have a local (register)
1679 variable or a formal (register) parameter which doesn't quite
1680 fill up an entire register. For now, just assume that it is
1681 legitimate to make the Dwarf info refer to the whole register
1682 which contains the given subreg. */
1684 rtl = XEXP (rtl, 0);
1689 /* Whenever a register number forms a part of the description of
1690 the method for calculating the (dynamic) address of a memory
1691 resident object, DWARF rules require the register number to
1692 be referred to as a "base register". This distinction is not
1693 based in any way upon what category of register the hardware
1694 believes the given register belongs to. This is strictly
1695 DWARF terminology we're dealing with here.
1697 Note that in cases where the location of a memory-resident data
1698 object could be expressed as:
1700 OP_ADD (OP_BASEREG (basereg), OP_CONST (0))
1702 the actual DWARF location descriptor that we generate may just
1703 be OP_BASEREG (basereg). This may look deceptively like the
1704 object in question was allocated to a register (rather than
1705 in memory) so DWARF consumers need to be aware of the subtle
1706 distinction between OP_REG and OP_BASEREG. */
1708 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_BASEREG);
1709 output_reg_number (rtl);
1713 output_mem_loc_descriptor (XEXP (rtl, 0));
1714 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_DEREF4);
1719 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_ADDR);
1720 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, rtl);
1724 output_mem_loc_descriptor (XEXP (rtl, 0));
1725 output_mem_loc_descriptor (XEXP (rtl, 1));
1726 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_ADD);
1730 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_CONST);
1731 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, INTVAL (rtl));
1735 /* If a pseudo-reg is optimized away, it is possible for it to
1736 be replaced with a MEM containing a multiply. Use a GNU extension
1738 output_mem_loc_descriptor (XEXP (rtl, 0));
1739 output_mem_loc_descriptor (XEXP (rtl, 1));
1740 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_MULT);
1748 /* Output a proper Dwarf location descriptor for a variable or parameter
1749 which is either allocated in a register or in a memory location. For
1750 a register, we just generate an OP_REG and the register number. For a
1751 memory location we provide a Dwarf postfix expression describing how to
1752 generate the (dynamic) address of the object onto the address stack. */
1755 output_loc_descriptor (rtl)
1758 switch (GET_CODE (rtl))
1762 /* The case of a subreg may arise when we have a local (register)
1763 variable or a formal (register) parameter which doesn't quite
1764 fill up an entire register. For now, just assume that it is
1765 legitimate to make the Dwarf info refer to the whole register
1766 which contains the given subreg. */
1768 rtl = XEXP (rtl, 0);
1772 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_REG);
1773 output_reg_number (rtl);
1777 output_mem_loc_descriptor (XEXP (rtl, 0));
1781 abort (); /* Should never happen */
1785 /* Given a tree node describing an array bound (either lower or upper)
1786 output a representation for that bound. */
1789 output_bound_representation (bound, dim_num, u_or_l)
1790 register tree bound;
1791 register unsigned dim_num; /* For multi-dimensional arrays. */
1792 register char u_or_l; /* Designates upper or lower bound. */
1794 switch (TREE_CODE (bound))
1800 /* All fixed-bounds are represented by INTEGER_CST nodes. */
1803 if (host_integerp (bound, 0))
1804 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, tree_low_cst (bound, 0));
1809 /* Dynamic bounds may be represented by NOP_EXPR nodes containing
1810 SAVE_EXPR nodes, in which case we can do something, or as
1811 an expression, which we cannot represent. */
1813 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
1814 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
1816 sprintf (begin_label, BOUND_BEGIN_LABEL_FMT,
1817 current_dienum, dim_num, u_or_l);
1819 sprintf (end_label, BOUND_END_LABEL_FMT,
1820 current_dienum, dim_num, u_or_l);
1822 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
1823 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
1825 /* If optimization is turned on, the SAVE_EXPRs that describe
1826 how to access the upper bound values are essentially bogus.
1827 They only describe (at best) how to get at these values at
1828 the points in the generated code right after they have just
1829 been computed. Worse yet, in the typical case, the upper
1830 bound values will not even *be* computed in the optimized
1831 code, so these SAVE_EXPRs are entirely bogus.
1833 In order to compensate for this fact, we check here to see
1834 if optimization is enabled, and if so, we effectively create
1835 an empty location description for the (unknown and unknowable)
1838 This should not cause too much trouble for existing (stupid?)
1839 debuggers because they have to deal with empty upper bounds
1840 location descriptions anyway in order to be able to deal with
1841 incomplete array types.
1843 Of course an intelligent debugger (GDB?) should be able to
1844 comprehend that a missing upper bound specification in a
1845 array type used for a storage class `auto' local array variable
1846 indicates that the upper bound is both unknown (at compile-
1847 time) and unknowable (at run-time) due to optimization. */
1851 while (TREE_CODE (bound) == NOP_EXPR
1852 || TREE_CODE (bound) == CONVERT_EXPR)
1853 bound = TREE_OPERAND (bound, 0);
1855 if (TREE_CODE (bound) == SAVE_EXPR)
1856 output_loc_descriptor
1857 (eliminate_regs (SAVE_EXPR_RTL (bound), 0, NULL_RTX));
1860 ASM_OUTPUT_LABEL (asm_out_file, end_label);
1867 /* Recursive function to output a sequence of value/name pairs for
1868 enumeration constants in reversed order. This is called from
1869 enumeration_type_die. */
1872 output_enumeral_list (link)
1877 output_enumeral_list (TREE_CHAIN (link));
1879 if (host_integerp (TREE_VALUE (link), 0))
1880 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
1881 tree_low_cst (TREE_VALUE (link), 0));
1883 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file,
1884 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
1888 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
1889 which is not less than the value itself. */
1891 static inline HOST_WIDE_INT
1892 ceiling (value, boundary)
1893 register HOST_WIDE_INT value;
1894 register unsigned int boundary;
1896 return (((value + boundary - 1) / boundary) * boundary);
1899 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
1900 pointer to the declared type for the relevant field variable, or return
1901 `integer_type_node' if the given node turns out to be an ERROR_MARK node. */
1909 if (TREE_CODE (decl) == ERROR_MARK)
1910 return integer_type_node;
1912 type = DECL_BIT_FIELD_TYPE (decl);
1914 type = TREE_TYPE (decl);
1918 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
1919 node, return the alignment in bits for the type, or else return
1920 BITS_PER_WORD if the node actually turns out to be an ERROR_MARK node. */
1922 static inline unsigned int
1923 simple_type_align_in_bits (type)
1926 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
1929 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
1930 node, return the size in bits for the type if it is a constant, or
1931 else return the alignment for the type if the type's size is not
1932 constant, or else return BITS_PER_WORD if the type actually turns out
1933 to be an ERROR_MARK node. */
1935 static inline unsigned HOST_WIDE_INT
1936 simple_type_size_in_bits (type)
1939 if (TREE_CODE (type) == ERROR_MARK)
1940 return BITS_PER_WORD;
1943 register tree type_size_tree = TYPE_SIZE (type);
1945 if (! host_integerp (type_size_tree, 1))
1946 return TYPE_ALIGN (type);
1948 return tree_low_cst (type_size_tree, 1);
1952 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
1953 return the byte offset of the lowest addressed byte of the "containing
1954 object" for the given FIELD_DECL, or return 0 if we are unable to deter-
1955 mine what that offset is, either because the argument turns out to be a
1956 pointer to an ERROR_MARK node, or because the offset is actually variable.
1957 (We can't handle the latter case just yet.) */
1959 static HOST_WIDE_INT
1960 field_byte_offset (decl)
1963 unsigned int type_align_in_bytes;
1964 unsigned int type_align_in_bits;
1965 unsigned HOST_WIDE_INT type_size_in_bits;
1966 HOST_WIDE_INT object_offset_in_align_units;
1967 HOST_WIDE_INT object_offset_in_bits;
1968 HOST_WIDE_INT object_offset_in_bytes;
1970 tree field_size_tree;
1971 HOST_WIDE_INT bitpos_int;
1972 HOST_WIDE_INT deepest_bitpos;
1973 unsigned HOST_WIDE_INT field_size_in_bits;
1975 if (TREE_CODE (decl) == ERROR_MARK)
1978 if (TREE_CODE (decl) != FIELD_DECL)
1981 type = field_type (decl);
1982 field_size_tree = DECL_SIZE (decl);
1984 /* If there was an error, the size could be zero. */
1985 if (! field_size_tree)
1993 /* We cannot yet cope with fields whose positions or sizes are variable,
1994 so for now, when we see such things, we simply return 0. Someday,
1995 we may be able to handle such cases, but it will be damn difficult. */
1997 if (! host_integerp (bit_position (decl), 0)
1998 || ! host_integerp (field_size_tree, 1))
2001 bitpos_int = int_bit_position (decl);
2002 field_size_in_bits = tree_low_cst (field_size_tree, 1);
2004 type_size_in_bits = simple_type_size_in_bits (type);
2005 type_align_in_bits = simple_type_align_in_bits (type);
2006 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
2008 /* Note that the GCC front-end doesn't make any attempt to keep track
2009 of the starting bit offset (relative to the start of the containing
2010 structure type) of the hypothetical "containing object" for a bit-
2011 field. Thus, when computing the byte offset value for the start of
2012 the "containing object" of a bit-field, we must deduce this infor-
2015 This can be rather tricky to do in some cases. For example, handling
2016 the following structure type definition when compiling for an i386/i486
2017 target (which only aligns long long's to 32-bit boundaries) can be very
2022 long long field2:31;
2025 Fortunately, there is a simple rule-of-thumb which can be used in such
2026 cases. When compiling for an i386/i486, GCC will allocate 8 bytes for
2027 the structure shown above. It decides to do this based upon one simple
2028 rule for bit-field allocation. Quite simply, GCC allocates each "con-
2029 taining object" for each bit-field at the first (i.e. lowest addressed)
2030 legitimate alignment boundary (based upon the required minimum alignment
2031 for the declared type of the field) which it can possibly use, subject
2032 to the condition that there is still enough available space remaining
2033 in the containing object (when allocated at the selected point) to
2034 fully accommodate all of the bits of the bit-field itself.
2036 This simple rule makes it obvious why GCC allocates 8 bytes for each
2037 object of the structure type shown above. When looking for a place to
2038 allocate the "containing object" for `field2', the compiler simply tries
2039 to allocate a 64-bit "containing object" at each successive 32-bit
2040 boundary (starting at zero) until it finds a place to allocate that 64-
2041 bit field such that at least 31 contiguous (and previously unallocated)
2042 bits remain within that selected 64 bit field. (As it turns out, for
2043 the example above, the compiler finds that it is OK to allocate the
2044 "containing object" 64-bit field at bit-offset zero within the
2047 Here we attempt to work backwards from the limited set of facts we're
2048 given, and we try to deduce from those facts, where GCC must have
2049 believed that the containing object started (within the structure type).
2051 The value we deduce is then used (by the callers of this routine) to
2052 generate AT_location and AT_bit_offset attributes for fields (both
2053 bit-fields and, in the case of AT_location, regular fields as well). */
2055 /* Figure out the bit-distance from the start of the structure to the
2056 "deepest" bit of the bit-field. */
2057 deepest_bitpos = bitpos_int + field_size_in_bits;
2059 /* This is the tricky part. Use some fancy footwork to deduce where the
2060 lowest addressed bit of the containing object must be. */
2061 object_offset_in_bits
2062 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
2064 /* Compute the offset of the containing object in "alignment units". */
2065 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
2067 /* Compute the offset of the containing object in bytes. */
2068 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
2070 /* The above code assumes that the field does not cross an alignment
2071 boundary. This can happen if PCC_BITFIELD_TYPE_MATTERS is not defined,
2072 or if the structure is packed. If this happens, then we get an object
2073 which starts after the bitfield, which means that the bit offset is
2074 negative. Gdb fails when given negative bit offsets. We avoid this
2075 by recomputing using the first bit of the bitfield. This will give
2076 us an object which does not completely contain the bitfield, but it
2077 will be aligned, and it will contain the first bit of the bitfield.
2079 However, only do this for a BYTES_BIG_ENDIAN target. For a
2080 ! BYTES_BIG_ENDIAN target, bitpos_int + field_size_in_bits is the first
2081 first bit of the bitfield. If we recompute using bitpos_int + 1 below,
2082 then we end up computing the object byte offset for the wrong word of the
2083 desired bitfield, which in turn causes the field offset to be negative
2084 in bit_offset_attribute. */
2085 if (BYTES_BIG_ENDIAN
2086 && object_offset_in_bits > bitpos_int)
2088 deepest_bitpos = bitpos_int + 1;
2089 object_offset_in_bits
2090 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
2091 object_offset_in_align_units = (object_offset_in_bits
2092 / type_align_in_bits);
2093 object_offset_in_bytes = (object_offset_in_align_units
2094 * type_align_in_bytes);
2097 return object_offset_in_bytes;
2100 /****************************** attributes *********************************/
2102 /* The following routines are responsible for writing out the various types
2103 of Dwarf attributes (and any following data bytes associated with them).
2104 These routines are listed in order based on the numerical codes of their
2105 associated attributes. */
2107 /* Generate an AT_sibling attribute. */
2110 sibling_attribute ()
2112 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2114 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_sibling);
2115 sprintf (label, DIE_BEGIN_LABEL_FMT, NEXT_DIE_NUM);
2116 ASM_OUTPUT_DWARF_REF (asm_out_file, label);
2119 /* Output the form of location attributes suitable for whole variables and
2120 whole parameters. Note that the location attributes for struct fields
2121 are generated by the routine `data_member_location_attribute' below. */
2124 location_attribute (rtl)
2127 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2128 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2130 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_location);
2131 sprintf (begin_label, LOC_BEGIN_LABEL_FMT, current_dienum);
2132 sprintf (end_label, LOC_END_LABEL_FMT, current_dienum);
2133 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2134 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2136 /* Handle a special case. If we are about to output a location descriptor
2137 for a variable or parameter which has been optimized out of existence,
2138 don't do that. Instead we output a zero-length location descriptor
2139 value as part of the location attribute.
2141 A variable which has been optimized out of existence will have a
2142 DECL_RTL value which denotes a pseudo-reg.
2144 Currently, in some rare cases, variables can have DECL_RTL values
2145 which look like (MEM (REG pseudo-reg#)). These cases are due to
2146 bugs elsewhere in the compiler. We treat such cases
2147 as if the variable(s) in question had been optimized out of existence.
2149 Note that in all cases where we wish to express the fact that a
2150 variable has been optimized out of existence, we do not simply
2151 suppress the generation of the entire location attribute because
2152 the absence of a location attribute in certain kinds of DIEs is
2153 used to indicate something else entirely... i.e. that the DIE
2154 represents an object declaration, but not a definition. So saith
2158 if (! is_pseudo_reg (rtl)
2159 && (GET_CODE (rtl) != MEM || ! is_pseudo_reg (XEXP (rtl, 0))))
2160 output_loc_descriptor (rtl);
2162 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2165 /* Output the specialized form of location attribute used for data members
2166 of struct and union types.
2168 In the special case of a FIELD_DECL node which represents a bit-field,
2169 the "offset" part of this special location descriptor must indicate the
2170 distance in bytes from the lowest-addressed byte of the containing
2171 struct or union type to the lowest-addressed byte of the "containing
2172 object" for the bit-field. (See the `field_byte_offset' function above.)
2174 For any given bit-field, the "containing object" is a hypothetical
2175 object (of some integral or enum type) within which the given bit-field
2176 lives. The type of this hypothetical "containing object" is always the
2177 same as the declared type of the individual bit-field itself (for GCC
2178 anyway... the DWARF spec doesn't actually mandate this).
2180 Note that it is the size (in bytes) of the hypothetical "containing
2181 object" which will be given in the AT_byte_size attribute for this
2182 bit-field. (See the `byte_size_attribute' function below.) It is
2183 also used when calculating the value of the AT_bit_offset attribute.
2184 (See the `bit_offset_attribute' function below.) */
2187 data_member_location_attribute (t)
2190 register unsigned object_offset_in_bytes;
2191 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2192 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2194 if (TREE_CODE (t) == TREE_VEC)
2195 object_offset_in_bytes = tree_low_cst (BINFO_OFFSET (t), 0);
2197 object_offset_in_bytes = field_byte_offset (t);
2199 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_location);
2200 sprintf (begin_label, LOC_BEGIN_LABEL_FMT, current_dienum);
2201 sprintf (end_label, LOC_END_LABEL_FMT, current_dienum);
2202 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2203 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2204 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_CONST);
2205 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, object_offset_in_bytes);
2206 ASM_OUTPUT_DWARF_STACK_OP (asm_out_file, OP_ADD);
2207 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2210 /* Output an AT_const_value attribute for a variable or a parameter which
2211 does not have a "location" either in memory or in a register. These
2212 things can arise in GNU C when a constant is passed as an actual
2213 parameter to an inlined function. They can also arise in C++ where
2214 declared constants do not necessarily get memory "homes". */
2217 const_value_attribute (rtl)
2220 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2221 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2223 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_const_value_block4);
2224 sprintf (begin_label, LOC_BEGIN_LABEL_FMT, current_dienum);
2225 sprintf (end_label, LOC_END_LABEL_FMT, current_dienum);
2226 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, end_label, begin_label);
2227 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2229 switch (GET_CODE (rtl))
2232 /* Note that a CONST_INT rtx could represent either an integer or
2233 a floating-point constant. A CONST_INT is used whenever the
2234 constant will fit into a single word. In all such cases, the
2235 original mode of the constant value is wiped out, and the
2236 CONST_INT rtx is assigned VOIDmode. Since we no longer have
2237 precise mode information for these constants, we always just
2238 output them using 4 bytes. */
2240 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, (unsigned) INTVAL (rtl));
2244 /* Note that a CONST_DOUBLE rtx could represent either an integer
2245 or a floating-point constant. A CONST_DOUBLE is used whenever
2246 the constant requires more than one word in order to be adequately
2247 represented. In all such cases, the original mode of the constant
2248 value is preserved as the mode of the CONST_DOUBLE rtx, but for
2249 simplicity we always just output CONST_DOUBLEs using 8 bytes. */
2251 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
2252 (unsigned int) CONST_DOUBLE_HIGH (rtl),
2253 (unsigned int) CONST_DOUBLE_LOW (rtl));
2257 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, XSTR (rtl, 0));
2263 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, rtl);
2267 /* In cases where an inlined instance of an inline function is passed
2268 the address of an `auto' variable (which is local to the caller)
2269 we can get a situation where the DECL_RTL of the artificial
2270 local variable (for the inlining) which acts as a stand-in for
2271 the corresponding formal parameter (of the inline function)
2272 will look like (plus:SI (reg:SI FRAME_PTR) (const_int ...)).
2273 This is not exactly a compile-time constant expression, but it
2274 isn't the address of the (artificial) local variable either.
2275 Rather, it represents the *value* which the artificial local
2276 variable always has during its lifetime. We currently have no
2277 way to represent such quasi-constant values in Dwarf, so for now
2278 we just punt and generate an AT_const_value attribute with form
2279 FORM_BLOCK4 and a length of zero. */
2283 abort (); /* No other kinds of rtx should be possible here. */
2286 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2289 /* Generate *either* an AT_location attribute or else an AT_const_value
2290 data attribute for a variable or a parameter. We generate the
2291 AT_const_value attribute only in those cases where the given
2292 variable or parameter does not have a true "location" either in
2293 memory or in a register. This can happen (for example) when a
2294 constant is passed as an actual argument in a call to an inline
2295 function. (It's possible that these things can crop up in other
2296 ways also.) Note that one type of constant value which can be
2297 passed into an inlined function is a constant pointer. This can
2298 happen for example if an actual argument in an inlined function
2299 call evaluates to a compile-time constant address. */
2302 location_or_const_value_attribute (decl)
2307 if (TREE_CODE (decl) == ERROR_MARK)
2310 if ((TREE_CODE (decl) != VAR_DECL) && (TREE_CODE (decl) != PARM_DECL))
2312 /* Should never happen. */
2317 /* Here we have to decide where we are going to say the parameter "lives"
2318 (as far as the debugger is concerned). We only have a couple of choices.
2319 GCC provides us with DECL_RTL and with DECL_INCOMING_RTL. DECL_RTL
2320 normally indicates where the parameter lives during most of the activa-
2321 tion of the function. If optimization is enabled however, this could
2322 be either NULL or else a pseudo-reg. Both of those cases indicate that
2323 the parameter doesn't really live anywhere (as far as the code generation
2324 parts of GCC are concerned) during most of the function's activation.
2325 That will happen (for example) if the parameter is never referenced
2326 within the function.
2328 We could just generate a location descriptor here for all non-NULL
2329 non-pseudo values of DECL_RTL and ignore all of the rest, but we can
2330 be a little nicer than that if we also consider DECL_INCOMING_RTL in
2331 cases where DECL_RTL is NULL or is a pseudo-reg.
2333 Note however that we can only get away with using DECL_INCOMING_RTL as
2334 a backup substitute for DECL_RTL in certain limited cases. In cases
2335 where DECL_ARG_TYPE(decl) indicates the same type as TREE_TYPE(decl)
2336 we can be sure that the parameter was passed using the same type as it
2337 is declared to have within the function, and that its DECL_INCOMING_RTL
2338 points us to a place where a value of that type is passed. In cases
2339 where DECL_ARG_TYPE(decl) and TREE_TYPE(decl) are different types
2340 however, we cannot (in general) use DECL_INCOMING_RTL as a backup
2341 substitute for DECL_RTL because in these cases, DECL_INCOMING_RTL
2342 points us to a value of some type which is *different* from the type
2343 of the parameter itself. Thus, if we tried to use DECL_INCOMING_RTL
2344 to generate a location attribute in such cases, the debugger would
2345 end up (for example) trying to fetch a `float' from a place which
2346 actually contains the first part of a `double'. That would lead to
2347 really incorrect and confusing output at debug-time, and we don't
2348 want that now do we?
2350 So in general, we DO NOT use DECL_INCOMING_RTL as a backup for DECL_RTL
2351 in cases where DECL_ARG_TYPE(decl) != TREE_TYPE(decl). There are a
2352 couple of cute exceptions however. On little-endian machines we can
2353 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE(decl) is
2354 not the same as TREE_TYPE(decl) but only when DECL_ARG_TYPE(decl) is
2355 an integral type which is smaller than TREE_TYPE(decl). These cases
2356 arise when (on a little-endian machine) a non-prototyped function has
2357 a parameter declared to be of type `short' or `char'. In such cases,
2358 TREE_TYPE(decl) will be `short' or `char', DECL_ARG_TYPE(decl) will be
2359 `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
2360 passed `int' value. If the debugger then uses that address to fetch a
2361 `short' or a `char' (on a little-endian machine) the result will be the
2362 correct data, so we allow for such exceptional cases below.
2364 Note that our goal here is to describe the place where the given formal
2365 parameter lives during most of the function's activation (i.e. between
2366 the end of the prologue and the start of the epilogue). We'll do that
2367 as best as we can. Note however that if the given formal parameter is
2368 modified sometime during the execution of the function, then a stack
2369 backtrace (at debug-time) will show the function as having been called
2370 with the *new* value rather than the value which was originally passed
2371 in. This happens rarely enough that it is not a major problem, but it
2372 *is* a problem, and I'd like to fix it. A future version of dwarfout.c
2373 may generate two additional attributes for any given TAG_formal_parameter
2374 DIE which will describe the "passed type" and the "passed location" for
2375 the given formal parameter in addition to the attributes we now generate
2376 to indicate the "declared type" and the "active location" for each
2377 parameter. This additional set of attributes could be used by debuggers
2378 for stack backtraces.
2380 Separately, note that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL
2381 can be NULL also. This happens (for example) for inlined-instances of
2382 inline function formal parameters which are never referenced. This really
2383 shouldn't be happening. All PARM_DECL nodes should get valid non-NULL
2384 DECL_INCOMING_RTL values, but integrate.c doesn't currently generate
2385 these values for inlined instances of inline function parameters, so
2386 when we see such cases, we are just out-of-luck for the time
2387 being (until integrate.c gets fixed).
2390 /* Use DECL_RTL as the "location" unless we find something better. */
2391 rtl = DECL_RTL (decl);
2393 if (TREE_CODE (decl) == PARM_DECL)
2394 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
2396 /* This decl represents a formal parameter which was optimized out. */
2397 register tree declared_type = type_main_variant (TREE_TYPE (decl));
2398 register tree passed_type = type_main_variant (DECL_ARG_TYPE (decl));
2400 /* Note that DECL_INCOMING_RTL may be NULL in here, but we handle
2401 *all* cases where (rtl == NULL_RTX) just below. */
2403 if (declared_type == passed_type)
2404 rtl = DECL_INCOMING_RTL (decl);
2405 else if (! BYTES_BIG_ENDIAN)
2406 if (TREE_CODE (declared_type) == INTEGER_TYPE)
2408 if (TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
2409 rtl = DECL_INCOMING_RTL (decl);
2412 if (rtl == NULL_RTX)
2415 rtl = eliminate_regs (rtl, 0, NULL_RTX);
2416 #ifdef LEAF_REG_REMAP
2417 if (current_function_uses_only_leaf_regs)
2418 leaf_renumber_regs_insn (rtl);
2421 switch (GET_CODE (rtl))
2424 /* The address of a variable that was optimized away; don't emit
2434 case PLUS: /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
2435 const_value_attribute (rtl);
2441 location_attribute (rtl);
2445 /* ??? CONCAT is used for complex variables, which may have the real
2446 part stored in one place and the imag part stored somewhere else.
2447 DWARF1 has no way to describe a variable that lives in two different
2448 places, so we just describe where the first part lives, and hope that
2449 the second part is stored after it. */
2450 location_attribute (XEXP (rtl, 0));
2454 abort (); /* Should never happen. */
2458 /* Generate an AT_name attribute given some string value to be included as
2459 the value of the attribute. */
2462 name_attribute (name_string)
2463 register const char *name_string;
2465 if (name_string && *name_string)
2467 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_name);
2468 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, name_string);
2473 fund_type_attribute (ft_code)
2474 register unsigned ft_code;
2476 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_fund_type);
2477 ASM_OUTPUT_DWARF_FUND_TYPE (asm_out_file, ft_code);
2481 mod_fund_type_attribute (type, decl_const, decl_volatile)
2483 register int decl_const;
2484 register int decl_volatile;
2486 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2487 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2489 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_mod_fund_type);
2490 sprintf (begin_label, MT_BEGIN_LABEL_FMT, current_dienum);
2491 sprintf (end_label, MT_END_LABEL_FMT, current_dienum);
2492 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2493 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2494 write_modifier_bytes (type, decl_const, decl_volatile);
2495 ASM_OUTPUT_DWARF_FUND_TYPE (asm_out_file,
2496 fundamental_type_code (root_type (type)));
2497 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2501 user_def_type_attribute (type)
2504 char ud_type_name[MAX_ARTIFICIAL_LABEL_BYTES];
2506 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_user_def_type);
2507 sprintf (ud_type_name, TYPE_NAME_FMT, TYPE_UID (type));
2508 ASM_OUTPUT_DWARF_REF (asm_out_file, ud_type_name);
2512 mod_u_d_type_attribute (type, decl_const, decl_volatile)
2514 register int decl_const;
2515 register int decl_volatile;
2517 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2518 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2519 char ud_type_name[MAX_ARTIFICIAL_LABEL_BYTES];
2521 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_mod_u_d_type);
2522 sprintf (begin_label, MT_BEGIN_LABEL_FMT, current_dienum);
2523 sprintf (end_label, MT_END_LABEL_FMT, current_dienum);
2524 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2525 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2526 write_modifier_bytes (type, decl_const, decl_volatile);
2527 sprintf (ud_type_name, TYPE_NAME_FMT, TYPE_UID (root_type (type)));
2528 ASM_OUTPUT_DWARF_REF (asm_out_file, ud_type_name);
2529 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2532 #ifdef USE_ORDERING_ATTRIBUTE
2534 ordering_attribute (ordering)
2535 register unsigned ordering;
2537 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_ordering);
2538 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, ordering);
2540 #endif /* defined(USE_ORDERING_ATTRIBUTE) */
2542 /* Note that the block of subscript information for an array type also
2543 includes information about the element type of type given array type. */
2546 subscript_data_attribute (type)
2549 register unsigned dimension_number;
2550 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2551 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2553 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_subscr_data);
2554 sprintf (begin_label, SS_BEGIN_LABEL_FMT, current_dienum);
2555 sprintf (end_label, SS_END_LABEL_FMT, current_dienum);
2556 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2557 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2559 /* The GNU compilers represent multidimensional array types as sequences
2560 of one dimensional array types whose element types are themselves array
2561 types. Here we squish that down, so that each multidimensional array
2562 type gets only one array_type DIE in the Dwarf debugging info. The
2563 draft Dwarf specification say that we are allowed to do this kind
2564 of compression in C (because there is no difference between an
2565 array or arrays and a multidimensional array in C) but for other
2566 source languages (e.g. Ada) we probably shouldn't do this. */
2568 for (dimension_number = 0;
2569 TREE_CODE (type) == ARRAY_TYPE;
2570 type = TREE_TYPE (type), dimension_number++)
2572 register tree domain = TYPE_DOMAIN (type);
2574 /* Arrays come in three flavors. Unspecified bounds, fixed
2575 bounds, and (in GNU C only) variable bounds. Handle all
2576 three forms here. */
2580 /* We have an array type with specified bounds. */
2582 register tree lower = TYPE_MIN_VALUE (domain);
2583 register tree upper = TYPE_MAX_VALUE (domain);
2585 /* Handle only fundamental types as index types for now. */
2587 if (! type_is_fundamental (domain))
2590 /* Output the representation format byte for this dimension. */
2592 ASM_OUTPUT_DWARF_FMT_BYTE (asm_out_file,
2593 FMT_CODE (1, TREE_CODE (lower) == INTEGER_CST,
2594 (upper && TREE_CODE (upper) == INTEGER_CST)));
2596 /* Output the index type for this dimension. */
2598 ASM_OUTPUT_DWARF_FUND_TYPE (asm_out_file,
2599 fundamental_type_code (domain));
2601 /* Output the representation for the lower bound. */
2603 output_bound_representation (lower, dimension_number, 'l');
2605 /* Output the representation for the upper bound. */
2607 output_bound_representation (upper, dimension_number, 'u');
2611 /* We have an array type with an unspecified length. For C and
2612 C++ we can assume that this really means that (a) the index
2613 type is an integral type, and (b) the lower bound is zero.
2614 Note that Dwarf defines the representation of an unspecified
2615 (upper) bound as being a zero-length location description. */
2617 /* Output the array-bounds format byte. */
2619 ASM_OUTPUT_DWARF_FMT_BYTE (asm_out_file, FMT_FT_C_X);
2621 /* Output the (assumed) index type. */
2623 ASM_OUTPUT_DWARF_FUND_TYPE (asm_out_file, FT_integer);
2625 /* Output the (assumed) lower bound (constant) value. */
2627 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
2629 /* Output the (empty) location description for the upper bound. */
2631 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0);
2635 /* Output the prefix byte that says that the element type is coming up. */
2637 ASM_OUTPUT_DWARF_FMT_BYTE (asm_out_file, FMT_ET);
2639 /* Output a representation of the type of the elements of this array type. */
2641 type_attribute (type, 0, 0);
2643 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2647 byte_size_attribute (tree_node)
2648 register tree tree_node;
2650 register unsigned size;
2652 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_byte_size);
2653 switch (TREE_CODE (tree_node))
2662 case QUAL_UNION_TYPE:
2664 size = int_size_in_bytes (tree_node);
2668 /* For a data member of a struct or union, the AT_byte_size is
2669 generally given as the number of bytes normally allocated for
2670 an object of the *declared* type of the member itself. This
2671 is true even for bit-fields. */
2672 size = simple_type_size_in_bits (field_type (tree_node))
2680 /* Note that `size' might be -1 when we get to this point. If it
2681 is, that indicates that the byte size of the entity in question
2682 is variable. We have no good way of expressing this fact in Dwarf
2683 at the present time, so just let the -1 pass on through. */
2685 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, size);
2688 /* For a FIELD_DECL node which represents a bit-field, output an attribute
2689 which specifies the distance in bits from the highest order bit of the
2690 "containing object" for the bit-field to the highest order bit of the
2693 For any given bit-field, the "containing object" is a hypothetical
2694 object (of some integral or enum type) within which the given bit-field
2695 lives. The type of this hypothetical "containing object" is always the
2696 same as the declared type of the individual bit-field itself.
2698 The determination of the exact location of the "containing object" for
2699 a bit-field is rather complicated. It's handled by the `field_byte_offset'
2702 Note that it is the size (in bytes) of the hypothetical "containing
2703 object" which will be given in the AT_byte_size attribute for this
2704 bit-field. (See `byte_size_attribute' above.) */
2707 bit_offset_attribute (decl)
2710 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
2711 tree type = DECL_BIT_FIELD_TYPE (decl);
2712 HOST_WIDE_INT bitpos_int;
2713 HOST_WIDE_INT highest_order_object_bit_offset;
2714 HOST_WIDE_INT highest_order_field_bit_offset;
2715 HOST_WIDE_INT bit_offset;
2717 /* Must be a bit field. */
2719 || TREE_CODE (decl) != FIELD_DECL)
2722 /* We can't yet handle bit-fields whose offsets or sizes are variable, so
2723 if we encounter such things, just return without generating any
2724 attribute whatsoever. */
2726 if (! host_integerp (bit_position (decl), 0)
2727 || ! host_integerp (DECL_SIZE (decl), 1))
2730 bitpos_int = int_bit_position (decl);
2732 /* Note that the bit offset is always the distance (in bits) from the
2733 highest-order bit of the "containing object" to the highest-order
2734 bit of the bit-field itself. Since the "high-order end" of any
2735 object or field is different on big-endian and little-endian machines,
2736 the computation below must take account of these differences. */
2738 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
2739 highest_order_field_bit_offset = bitpos_int;
2741 if (! BYTES_BIG_ENDIAN)
2743 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 1);
2744 highest_order_object_bit_offset += simple_type_size_in_bits (type);
2749 ? highest_order_object_bit_offset - highest_order_field_bit_offset
2750 : highest_order_field_bit_offset - highest_order_object_bit_offset);
2752 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_bit_offset);
2753 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, bit_offset);
2756 /* For a FIELD_DECL node which represents a bit field, output an attribute
2757 which specifies the length in bits of the given field. */
2760 bit_size_attribute (decl)
2763 /* Must be a field and a bit field. */
2764 if (TREE_CODE (decl) != FIELD_DECL
2765 || ! DECL_BIT_FIELD_TYPE (decl))
2768 if (host_integerp (DECL_SIZE (decl), 1))
2770 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_bit_size);
2771 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
2772 tree_low_cst (DECL_SIZE (decl), 1));
2776 /* The following routine outputs the `element_list' attribute for enumeration
2777 type DIEs. The element_lits attribute includes the names and values of
2778 all of the enumeration constants associated with the given enumeration
2782 element_list_attribute (element)
2783 register tree element;
2785 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2786 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2788 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_element_list);
2789 sprintf (begin_label, EE_BEGIN_LABEL_FMT, current_dienum);
2790 sprintf (end_label, EE_END_LABEL_FMT, current_dienum);
2791 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, end_label, begin_label);
2792 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2794 /* Here we output a list of value/name pairs for each enumeration constant
2795 defined for this enumeration type (as required), but we do it in REVERSE
2796 order. The order is the one required by the draft #5 Dwarf specification
2797 published by the UI/PLSIG. */
2799 output_enumeral_list (element); /* Recursively output the whole list. */
2801 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2804 /* Generate an AT_stmt_list attribute. These are normally present only in
2805 DIEs with a TAG_compile_unit tag. */
2808 stmt_list_attribute (label)
2809 register const char *label;
2811 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_stmt_list);
2812 /* Don't use ASM_OUTPUT_DWARF_DATA4 here. */
2813 ASM_OUTPUT_DWARF_ADDR (asm_out_file, label);
2816 /* Generate an AT_low_pc attribute for a label DIE, a lexical_block DIE or
2817 for a subroutine DIE. */
2820 low_pc_attribute (asm_low_label)
2821 register const char *asm_low_label;
2823 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_low_pc);
2824 ASM_OUTPUT_DWARF_ADDR (asm_out_file, asm_low_label);
2827 /* Generate an AT_high_pc attribute for a lexical_block DIE or for a
2831 high_pc_attribute (asm_high_label)
2832 register const char *asm_high_label;
2834 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_high_pc);
2835 ASM_OUTPUT_DWARF_ADDR (asm_out_file, asm_high_label);
2838 /* Generate an AT_body_begin attribute for a subroutine DIE. */
2841 body_begin_attribute (asm_begin_label)
2842 register const char *asm_begin_label;
2844 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_body_begin);
2845 ASM_OUTPUT_DWARF_ADDR (asm_out_file, asm_begin_label);
2848 /* Generate an AT_body_end attribute for a subroutine DIE. */
2851 body_end_attribute (asm_end_label)
2852 register const char *asm_end_label;
2854 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_body_end);
2855 ASM_OUTPUT_DWARF_ADDR (asm_out_file, asm_end_label);
2858 /* Generate an AT_language attribute given a LANG value. These attributes
2859 are used only within TAG_compile_unit DIEs. */
2862 language_attribute (language_code)
2863 register unsigned language_code;
2865 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_language);
2866 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, language_code);
2870 member_attribute (context)
2871 register tree context;
2873 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2875 /* Generate this attribute only for members in C++. */
2877 if (context != NULL && is_tagged_type (context))
2879 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_member);
2880 sprintf (label, TYPE_NAME_FMT, TYPE_UID (context));
2881 ASM_OUTPUT_DWARF_REF (asm_out_file, label);
2887 string_length_attribute (upper_bound)
2888 register tree upper_bound;
2890 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
2891 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2893 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_string_length);
2894 sprintf (begin_label, SL_BEGIN_LABEL_FMT, current_dienum);
2895 sprintf (end_label, SL_END_LABEL_FMT, current_dienum);
2896 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, end_label, begin_label);
2897 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
2898 output_bound_representation (upper_bound, 0, 'u');
2899 ASM_OUTPUT_LABEL (asm_out_file, end_label);
2904 comp_dir_attribute (dirname)
2905 register const char *dirname;
2907 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_comp_dir);
2908 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, dirname);
2912 sf_names_attribute (sf_names_start_label)
2913 register const char *sf_names_start_label;
2915 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_sf_names);
2916 /* Don't use ASM_OUTPUT_DWARF_DATA4 here. */
2917 ASM_OUTPUT_DWARF_ADDR (asm_out_file, sf_names_start_label);
2921 src_info_attribute (src_info_start_label)
2922 register const char *src_info_start_label;
2924 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_src_info);
2925 /* Don't use ASM_OUTPUT_DWARF_DATA4 here. */
2926 ASM_OUTPUT_DWARF_ADDR (asm_out_file, src_info_start_label);
2930 mac_info_attribute (mac_info_start_label)
2931 register const char *mac_info_start_label;
2933 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_mac_info);
2934 /* Don't use ASM_OUTPUT_DWARF_DATA4 here. */
2935 ASM_OUTPUT_DWARF_ADDR (asm_out_file, mac_info_start_label);
2939 prototyped_attribute (func_type)
2940 register tree func_type;
2942 if ((strcmp (language_string, "GNU C") == 0)
2943 && (TYPE_ARG_TYPES (func_type) != NULL))
2945 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_prototyped);
2946 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
2951 producer_attribute (producer)
2952 register const char *producer;
2954 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_producer);
2955 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, producer);
2959 inline_attribute (decl)
2962 if (DECL_INLINE (decl))
2964 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_inline);
2965 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
2970 containing_type_attribute (containing_type)
2971 register tree containing_type;
2973 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2975 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_containing_type);
2976 sprintf (label, TYPE_NAME_FMT, TYPE_UID (containing_type));
2977 ASM_OUTPUT_DWARF_REF (asm_out_file, label);
2981 abstract_origin_attribute (origin)
2982 register tree origin;
2984 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2986 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_abstract_origin);
2987 switch (TREE_CODE_CLASS (TREE_CODE (origin)))
2990 sprintf (label, DECL_NAME_FMT, DECL_UID (origin));
2994 sprintf (label, TYPE_NAME_FMT, TYPE_UID (origin));
2998 abort (); /* Should never happen. */
3001 ASM_OUTPUT_DWARF_REF (asm_out_file, label);
3004 #ifdef DWARF_DECL_COORDINATES
3006 src_coords_attribute (src_fileno, src_lineno)
3007 register unsigned src_fileno;
3008 register unsigned src_lineno;
3010 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_src_coords);
3011 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, src_fileno);
3012 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, src_lineno);
3014 #endif /* defined(DWARF_DECL_COORDINATES) */
3017 pure_or_virtual_attribute (func_decl)
3018 register tree func_decl;
3020 if (DECL_VIRTUAL_P (func_decl))
3022 #if 0 /* DECL_ABSTRACT_VIRTUAL_P is C++-specific. */
3023 if (DECL_ABSTRACT_VIRTUAL_P (func_decl))
3024 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_pure_virtual);
3027 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_virtual);
3028 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
3032 /************************* end of attributes *****************************/
3034 /********************* utility routines for DIEs *************************/
3036 /* Output an AT_name attribute and an AT_src_coords attribute for the
3037 given decl, but only if it actually has a name. */
3040 name_and_src_coords_attributes (decl)
3043 register tree decl_name = DECL_NAME (decl);
3045 if (decl_name && IDENTIFIER_POINTER (decl_name))
3047 name_attribute (IDENTIFIER_POINTER (decl_name));
3048 #ifdef DWARF_DECL_COORDINATES
3050 register unsigned file_index;
3052 /* This is annoying, but we have to pop out of the .debug section
3053 for a moment while we call `lookup_filename' because calling it
3054 may cause a temporary switch into the .debug_sfnames section and
3055 most svr4 assemblers are not smart enough to be able to nest
3056 section switches to any depth greater than one. Note that we
3057 also can't skirt this issue by delaying all output to the
3058 .debug_sfnames section unit the end of compilation because that
3059 would cause us to have inter-section forward references and
3060 Fred Fish sez that m68k/svr4 assemblers botch those. */
3062 ASM_OUTPUT_POP_SECTION (asm_out_file);
3063 file_index = lookup_filename (DECL_SOURCE_FILE (decl));
3064 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DEBUG_SECTION);
3066 src_coords_attribute (file_index, DECL_SOURCE_LINE (decl));
3068 #endif /* defined(DWARF_DECL_COORDINATES) */
3072 /* Many forms of DIEs contain a "type description" part. The following
3073 routine writes out these "type descriptor" parts. */
3076 type_attribute (type, decl_const, decl_volatile)
3078 register int decl_const;
3079 register int decl_volatile;
3081 register enum tree_code code = TREE_CODE (type);
3082 register int root_type_modified;
3084 if (code == ERROR_MARK)
3087 /* Handle a special case. For functions whose return type is void,
3088 we generate *no* type attribute. (Note that no object may have
3089 type `void', so this only applies to function return types. */
3091 if (code == VOID_TYPE)
3094 /* If this is a subtype, find the underlying type. Eventually,
3095 this should write out the appropriate subtype info. */
3096 while ((code == INTEGER_TYPE || code == REAL_TYPE)
3097 && TREE_TYPE (type) != 0)
3098 type = TREE_TYPE (type), code = TREE_CODE (type);
3100 root_type_modified = (code == POINTER_TYPE || code == REFERENCE_TYPE
3101 || decl_const || decl_volatile
3102 || TYPE_READONLY (type) || TYPE_VOLATILE (type));
3104 if (type_is_fundamental (root_type (type)))
3106 if (root_type_modified)
3107 mod_fund_type_attribute (type, decl_const, decl_volatile);
3109 fund_type_attribute (fundamental_type_code (type));
3113 if (root_type_modified)
3114 mod_u_d_type_attribute (type, decl_const, decl_volatile);
3116 /* We have to get the type_main_variant here (and pass that to the
3117 `user_def_type_attribute' routine) because the ..._TYPE node we
3118 have might simply be a *copy* of some original type node (where
3119 the copy was created to help us keep track of typedef names)
3120 and that copy might have a different TYPE_UID from the original
3121 ..._TYPE node. (Note that when `equate_type_number_to_die_number'
3122 is labeling a given type DIE for future reference, it always and
3123 only creates labels for DIEs representing *main variants*, and it
3124 never even knows about non-main-variants.) */
3125 user_def_type_attribute (type_main_variant (type));
3129 /* Given a tree pointer to a struct, class, union, or enum type node, return
3130 a pointer to the (string) tag name for the given type, or zero if the
3131 type was declared without a tag. */
3137 register const char *name = 0;
3139 if (TYPE_NAME (type) != 0)
3141 register tree t = 0;
3143 /* Find the IDENTIFIER_NODE for the type name. */
3144 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
3145 t = TYPE_NAME (type);
3147 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
3148 a TYPE_DECL node, regardless of whether or not a `typedef' was
3150 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
3151 && ! DECL_IGNORED_P (TYPE_NAME (type)))
3152 t = DECL_NAME (TYPE_NAME (type));
3154 /* Now get the name as a string, or invent one. */
3156 name = IDENTIFIER_POINTER (t);
3159 return (name == 0 || *name == '\0') ? 0 : name;
3165 /* Start by checking if the pending_sibling_stack needs to be expanded.
3166 If necessary, expand it. */
3168 if (pending_siblings == pending_siblings_allocated)
3170 pending_siblings_allocated += PENDING_SIBLINGS_INCREMENT;
3171 pending_sibling_stack
3172 = (unsigned *) xrealloc (pending_sibling_stack,
3173 pending_siblings_allocated * sizeof(unsigned));
3177 NEXT_DIE_NUM = next_unused_dienum++;
3180 /* Pop the sibling stack so that the most recently pushed DIEnum becomes the
3190 member_declared_type (member)
3191 register tree member;
3193 return (DECL_BIT_FIELD_TYPE (member))
3194 ? DECL_BIT_FIELD_TYPE (member)
3195 : TREE_TYPE (member);
3198 /* Get the function's label, as described by its RTL.
3199 This may be different from the DECL_NAME name used
3200 in the source file. */
3203 function_start_label (decl)
3209 x = DECL_RTL (decl);
3210 if (GET_CODE (x) != MEM)
3213 if (GET_CODE (x) != SYMBOL_REF)
3215 fnname = XSTR (x, 0);
3220 /******************************* DIEs ************************************/
3222 /* Output routines for individual types of DIEs. */
3224 /* Note that every type of DIE (except a null DIE) gets a sibling. */
3227 output_array_type_die (arg)
3230 register tree type = arg;
3232 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_array_type);
3233 sibling_attribute ();
3234 equate_type_number_to_die_number (type);
3235 member_attribute (TYPE_CONTEXT (type));
3237 /* I believe that we can default the array ordering. SDB will probably
3238 do the right things even if AT_ordering is not present. It's not
3239 even an issue until we start to get into multidimensional arrays
3240 anyway. If SDB is ever caught doing the Wrong Thing for multi-
3241 dimensional arrays, then we'll have to put the AT_ordering attribute
3242 back in. (But if and when we find out that we need to put these in,
3243 we will only do so for multidimensional arrays. After all, we don't
3244 want to waste space in the .debug section now do we?) */
3246 #ifdef USE_ORDERING_ATTRIBUTE
3247 ordering_attribute (ORD_row_major);
3248 #endif /* defined(USE_ORDERING_ATTRIBUTE) */
3250 subscript_data_attribute (type);
3254 output_set_type_die (arg)
3257 register tree type = arg;
3259 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_set_type);
3260 sibling_attribute ();
3261 equate_type_number_to_die_number (type);
3262 member_attribute (TYPE_CONTEXT (type));
3263 type_attribute (TREE_TYPE (type), 0, 0);
3267 /* Implement this when there is a GNU FORTRAN or GNU Ada front end. */
3270 output_entry_point_die (arg)
3273 register tree decl = arg;
3274 register tree origin = decl_ultimate_origin (decl);
3276 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_entry_point);
3277 sibling_attribute ();
3280 abstract_origin_attribute (origin);
3283 name_and_src_coords_attributes (decl);
3284 member_attribute (DECL_CONTEXT (decl));
3285 type_attribute (TREE_TYPE (TREE_TYPE (decl)), 0, 0);
3287 if (DECL_ABSTRACT (decl))
3288 equate_decl_number_to_die_number (decl);
3290 low_pc_attribute (function_start_label (decl));
3294 /* Output a DIE to represent an inlined instance of an enumeration type. */
3297 output_inlined_enumeration_type_die (arg)
3300 register tree type = arg;
3302 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_enumeration_type);
3303 sibling_attribute ();
3304 if (!TREE_ASM_WRITTEN (type))
3306 abstract_origin_attribute (type);
3309 /* Output a DIE to represent an inlined instance of a structure type. */
3312 output_inlined_structure_type_die (arg)
3315 register tree type = arg;
3317 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_structure_type);
3318 sibling_attribute ();
3319 if (!TREE_ASM_WRITTEN (type))
3321 abstract_origin_attribute (type);
3324 /* Output a DIE to represent an inlined instance of a union type. */
3327 output_inlined_union_type_die (arg)
3330 register tree type = arg;
3332 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_union_type);
3333 sibling_attribute ();
3334 if (!TREE_ASM_WRITTEN (type))
3336 abstract_origin_attribute (type);
3339 /* Output a DIE to represent an enumeration type. Note that these DIEs
3340 include all of the information about the enumeration values also.
3341 This information is encoded into the element_list attribute. */
3344 output_enumeration_type_die (arg)
3347 register tree type = arg;
3349 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_enumeration_type);
3350 sibling_attribute ();
3351 equate_type_number_to_die_number (type);
3352 name_attribute (type_tag (type));
3353 member_attribute (TYPE_CONTEXT (type));
3355 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
3356 given enum type is incomplete, do not generate the AT_byte_size
3357 attribute or the AT_element_list attribute. */
3359 if (COMPLETE_TYPE_P (type))
3361 byte_size_attribute (type);
3362 element_list_attribute (TYPE_FIELDS (type));
3366 /* Output a DIE to represent either a real live formal parameter decl or
3367 to represent just the type of some formal parameter position in some
3370 Note that this routine is a bit unusual because its argument may be
3371 a ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
3372 represents an inlining of some PARM_DECL) or else some sort of a
3373 ..._TYPE node. If it's the former then this function is being called
3374 to output a DIE to represent a formal parameter object (or some inlining
3375 thereof). If it's the latter, then this function is only being called
3376 to output a TAG_formal_parameter DIE to stand as a placeholder for some
3377 formal argument type of some subprogram type. */
3380 output_formal_parameter_die (arg)
3383 register tree node = arg;
3385 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_formal_parameter);
3386 sibling_attribute ();
3388 switch (TREE_CODE_CLASS (TREE_CODE (node)))
3390 case 'd': /* We were called with some kind of a ..._DECL node. */
3392 register tree origin = decl_ultimate_origin (node);
3395 abstract_origin_attribute (origin);
3398 name_and_src_coords_attributes (node);
3399 type_attribute (TREE_TYPE (node),
3400 TREE_READONLY (node), TREE_THIS_VOLATILE (node));
3402 if (DECL_ABSTRACT (node))
3403 equate_decl_number_to_die_number (node);
3405 location_or_const_value_attribute (node);
3409 case 't': /* We were called with some kind of a ..._TYPE node. */
3410 type_attribute (node, 0, 0);
3414 abort (); /* Should never happen. */
3418 /* Output a DIE to represent a declared function (either file-scope
3419 or block-local) which has "external linkage" (according to ANSI-C). */
3422 output_global_subroutine_die (arg)
3425 register tree decl = arg;
3426 register tree origin = decl_ultimate_origin (decl);
3428 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_global_subroutine);
3429 sibling_attribute ();
3432 abstract_origin_attribute (origin);
3435 register tree type = TREE_TYPE (decl);
3437 name_and_src_coords_attributes (decl);
3438 inline_attribute (decl);
3439 prototyped_attribute (type);
3440 member_attribute (DECL_CONTEXT (decl));
3441 type_attribute (TREE_TYPE (type), 0, 0);
3442 pure_or_virtual_attribute (decl);
3444 if (DECL_ABSTRACT (decl))
3445 equate_decl_number_to_die_number (decl);
3448 if (! DECL_EXTERNAL (decl) && ! in_class
3449 && decl == current_function_decl)
3451 char label[MAX_ARTIFICIAL_LABEL_BYTES];
3453 low_pc_attribute (function_start_label (decl));
3454 sprintf (label, FUNC_END_LABEL_FMT, current_funcdef_number);
3455 high_pc_attribute (label);
3456 if (use_gnu_debug_info_extensions)
3458 sprintf (label, BODY_BEGIN_LABEL_FMT, current_funcdef_number);
3459 body_begin_attribute (label);
3460 sprintf (label, BODY_END_LABEL_FMT, current_funcdef_number);
3461 body_end_attribute (label);
3467 /* Output a DIE to represent a declared data object (either file-scope
3468 or block-local) which has "external linkage" (according to ANSI-C). */
3471 output_global_variable_die (arg)
3474 register tree decl = arg;
3475 register tree origin = decl_ultimate_origin (decl);
3477 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_global_variable);
3478 sibling_attribute ();
3480 abstract_origin_attribute (origin);
3483 name_and_src_coords_attributes (decl);
3484 member_attribute (DECL_CONTEXT (decl));
3485 type_attribute (TREE_TYPE (decl),
3486 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl));
3488 if (DECL_ABSTRACT (decl))
3489 equate_decl_number_to_die_number (decl);
3492 if (! DECL_EXTERNAL (decl) && ! in_class
3493 && current_function_decl == decl_function_context (decl))
3494 location_or_const_value_attribute (decl);
3499 output_label_die (arg)
3502 register tree decl = arg;
3503 register tree origin = decl_ultimate_origin (decl);
3505 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_label);
3506 sibling_attribute ();
3508 abstract_origin_attribute (origin);
3510 name_and_src_coords_attributes (decl);
3511 if (DECL_ABSTRACT (decl))
3512 equate_decl_number_to_die_number (decl);
3515 register rtx insn = DECL_RTL (decl);
3517 /* Deleted labels are programmer specified labels which have been
3518 eliminated because of various optimisations. We still emit them
3519 here so that it is possible to put breakpoints on them. */
3520 if (GET_CODE (insn) == CODE_LABEL
3521 || ((GET_CODE (insn) == NOTE
3522 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
3524 char label[MAX_ARTIFICIAL_LABEL_BYTES];
3526 /* When optimization is enabled (via -O) some parts of the compiler
3527 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
3528 represent source-level labels which were explicitly declared by
3529 the user. This really shouldn't be happening though, so catch
3530 it if it ever does happen. */
3532 if (INSN_DELETED_P (insn))
3533 abort (); /* Should never happen. */
3535 sprintf (label, INSN_LABEL_FMT, current_funcdef_number,
3536 (unsigned) INSN_UID (insn));
3537 low_pc_attribute (label);
3543 output_lexical_block_die (arg)
3546 register tree stmt = arg;
3548 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_lexical_block);
3549 sibling_attribute ();
3551 if (! BLOCK_ABSTRACT (stmt))
3553 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
3554 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3556 sprintf (begin_label, BLOCK_BEGIN_LABEL_FMT, BLOCK_NUMBER (stmt));
3557 low_pc_attribute (begin_label);
3558 sprintf (end_label, BLOCK_END_LABEL_FMT, BLOCK_NUMBER (stmt));
3559 high_pc_attribute (end_label);
3564 output_inlined_subroutine_die (arg)
3567 register tree stmt = arg;
3569 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_inlined_subroutine);
3570 sibling_attribute ();
3572 abstract_origin_attribute (block_ultimate_origin (stmt));
3573 if (! BLOCK_ABSTRACT (stmt))
3575 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
3576 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3578 sprintf (begin_label, BLOCK_BEGIN_LABEL_FMT, BLOCK_NUMBER (stmt));
3579 low_pc_attribute (begin_label);
3580 sprintf (end_label, BLOCK_END_LABEL_FMT, BLOCK_NUMBER (stmt));
3581 high_pc_attribute (end_label);
3585 /* Output a DIE to represent a declared data object (either file-scope
3586 or block-local) which has "internal linkage" (according to ANSI-C). */
3589 output_local_variable_die (arg)
3592 register tree decl = arg;
3593 register tree origin = decl_ultimate_origin (decl);
3595 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_local_variable);
3596 sibling_attribute ();
3598 abstract_origin_attribute (origin);
3601 name_and_src_coords_attributes (decl);
3602 member_attribute (DECL_CONTEXT (decl));
3603 type_attribute (TREE_TYPE (decl),
3604 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl));
3606 if (DECL_ABSTRACT (decl))
3607 equate_decl_number_to_die_number (decl);
3609 location_or_const_value_attribute (decl);
3613 output_member_die (arg)
3616 register tree decl = arg;
3618 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_member);
3619 sibling_attribute ();
3620 name_and_src_coords_attributes (decl);
3621 member_attribute (DECL_CONTEXT (decl));
3622 type_attribute (member_declared_type (decl),
3623 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl));
3624 if (DECL_BIT_FIELD_TYPE (decl)) /* If this is a bit field... */
3626 byte_size_attribute (decl);
3627 bit_size_attribute (decl);
3628 bit_offset_attribute (decl);
3630 data_member_location_attribute (decl);
3634 /* Don't generate either pointer_type DIEs or reference_type DIEs. Use
3635 modified types instead.
3637 We keep this code here just in case these types of DIEs may be
3638 needed to represent certain things in other languages (e.g. Pascal)
3642 output_pointer_type_die (arg)
3645 register tree type = arg;
3647 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_pointer_type);
3648 sibling_attribute ();
3649 equate_type_number_to_die_number (type);
3650 member_attribute (TYPE_CONTEXT (type));
3651 type_attribute (TREE_TYPE (type), 0, 0);
3655 output_reference_type_die (arg)
3658 register tree type = arg;
3660 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_reference_type);
3661 sibling_attribute ();
3662 equate_type_number_to_die_number (type);
3663 member_attribute (TYPE_CONTEXT (type));
3664 type_attribute (TREE_TYPE (type), 0, 0);
3669 output_ptr_to_mbr_type_die (arg)
3672 register tree type = arg;
3674 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_ptr_to_member_type);
3675 sibling_attribute ();
3676 equate_type_number_to_die_number (type);
3677 member_attribute (TYPE_CONTEXT (type));
3678 containing_type_attribute (TYPE_OFFSET_BASETYPE (type));
3679 type_attribute (TREE_TYPE (type), 0, 0);
3683 output_compile_unit_die (arg)
3686 register const char *main_input_filename = arg;
3688 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_compile_unit);
3689 sibling_attribute ();
3691 name_attribute (main_input_filename);
3696 sprintf (producer, "%s %s", language_string, version_string);
3697 producer_attribute (producer);
3700 if (strcmp (language_string, "GNU C++") == 0)
3701 language_attribute (LANG_C_PLUS_PLUS);
3702 else if (strcmp (language_string, "GNU Ada") == 0)
3703 language_attribute (LANG_ADA83);
3704 else if (strcmp (language_string, "GNU F77") == 0)
3705 language_attribute (LANG_FORTRAN77);
3706 else if (strcmp (language_string, "GNU Pascal") == 0)
3707 language_attribute (LANG_PASCAL83);
3708 else if (flag_traditional)
3709 language_attribute (LANG_C);
3711 language_attribute (LANG_C89);
3712 low_pc_attribute (TEXT_BEGIN_LABEL);
3713 high_pc_attribute (TEXT_END_LABEL);
3714 if (debug_info_level >= DINFO_LEVEL_NORMAL)
3715 stmt_list_attribute (LINE_BEGIN_LABEL);
3716 last_filename = xstrdup (main_input_filename);
3719 const char *wd = getpwd ();
3721 comp_dir_attribute (wd);
3724 if (debug_info_level >= DINFO_LEVEL_NORMAL && use_gnu_debug_info_extensions)
3726 sf_names_attribute (SFNAMES_BEGIN_LABEL);
3727 src_info_attribute (SRCINFO_BEGIN_LABEL);
3728 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
3729 mac_info_attribute (MACINFO_BEGIN_LABEL);
3734 output_string_type_die (arg)
3737 register tree type = arg;
3739 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_string_type);
3740 sibling_attribute ();
3741 equate_type_number_to_die_number (type);
3742 member_attribute (TYPE_CONTEXT (type));
3743 /* this is a fixed length string */
3744 byte_size_attribute (type);
3748 output_inheritance_die (arg)
3751 register tree binfo = arg;
3753 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_inheritance);
3754 sibling_attribute ();
3755 type_attribute (BINFO_TYPE (binfo), 0, 0);
3756 data_member_location_attribute (binfo);
3757 if (TREE_VIA_VIRTUAL (binfo))
3759 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_virtual);
3760 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
3762 if (TREE_VIA_PUBLIC (binfo))
3764 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_public);
3765 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
3767 else if (TREE_VIA_PROTECTED (binfo))
3769 ASM_OUTPUT_DWARF_ATTRIBUTE (asm_out_file, AT_protected);
3770 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
3775 output_structure_type_die (arg)
3778 register tree type = arg;
3780 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_structure_type);
3781 sibling_attribute ();
3782 equate_type_number_to_die_number (type);
3783 name_attribute (type_tag (type));
3784 member_attribute (TYPE_CONTEXT (type));
3786 /* If this type has been completed, then give it a byte_size attribute
3787 and prepare to give a list of members. Otherwise, don't do either of
3788 these things. In the latter case, we will not be generating a list
3789 of members (since we don't have any idea what they might be for an
3790 incomplete type). */
3792 if (COMPLETE_TYPE_P (type))
3795 byte_size_attribute (type);
3799 /* Output a DIE to represent a declared function (either file-scope
3800 or block-local) which has "internal linkage" (according to ANSI-C). */
3803 output_local_subroutine_die (arg)
3806 register tree decl = arg;
3807 register tree origin = decl_ultimate_origin (decl);
3809 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_subroutine);
3810 sibling_attribute ();
3813 abstract_origin_attribute (origin);
3816 register tree type = TREE_TYPE (decl);
3818 name_and_src_coords_attributes (decl);
3819 inline_attribute (decl);
3820 prototyped_attribute (type);
3821 member_attribute (DECL_CONTEXT (decl));
3822 type_attribute (TREE_TYPE (type), 0, 0);
3823 pure_or_virtual_attribute (decl);
3825 if (DECL_ABSTRACT (decl))
3826 equate_decl_number_to_die_number (decl);
3829 /* Avoid getting screwed up in cases where a function was declared
3830 static but where no definition was ever given for it. */
3832 if (TREE_ASM_WRITTEN (decl))
3834 char label[MAX_ARTIFICIAL_LABEL_BYTES];
3835 low_pc_attribute (function_start_label (decl));
3836 sprintf (label, FUNC_END_LABEL_FMT, current_funcdef_number);
3837 high_pc_attribute (label);
3838 if (use_gnu_debug_info_extensions)
3840 sprintf (label, BODY_BEGIN_LABEL_FMT, current_funcdef_number);
3841 body_begin_attribute (label);
3842 sprintf (label, BODY_END_LABEL_FMT, current_funcdef_number);
3843 body_end_attribute (label);
3850 output_subroutine_type_die (arg)
3853 register tree type = arg;
3854 register tree return_type = TREE_TYPE (type);
3856 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_subroutine_type);
3857 sibling_attribute ();
3859 equate_type_number_to_die_number (type);
3860 prototyped_attribute (type);
3861 member_attribute (TYPE_CONTEXT (type));
3862 type_attribute (return_type, 0, 0);
3866 output_typedef_die (arg)
3869 register tree decl = arg;
3870 register tree origin = decl_ultimate_origin (decl);
3872 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_typedef);
3873 sibling_attribute ();
3875 abstract_origin_attribute (origin);
3878 name_and_src_coords_attributes (decl);
3879 member_attribute (DECL_CONTEXT (decl));
3880 type_attribute (TREE_TYPE (decl),
3881 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl));
3883 if (DECL_ABSTRACT (decl))
3884 equate_decl_number_to_die_number (decl);
3888 output_union_type_die (arg)
3891 register tree type = arg;
3893 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_union_type);
3894 sibling_attribute ();
3895 equate_type_number_to_die_number (type);
3896 name_attribute (type_tag (type));
3897 member_attribute (TYPE_CONTEXT (type));
3899 /* If this type has been completed, then give it a byte_size attribute
3900 and prepare to give a list of members. Otherwise, don't do either of
3901 these things. In the latter case, we will not be generating a list
3902 of members (since we don't have any idea what they might be for an
3903 incomplete type). */
3905 if (COMPLETE_TYPE_P (type))
3908 byte_size_attribute (type);
3912 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
3913 at the end of an (ANSI prototyped) formal parameters list. */
3916 output_unspecified_parameters_die (arg)
3919 register tree decl_or_type = arg;
3921 ASM_OUTPUT_DWARF_TAG (asm_out_file, TAG_unspecified_parameters);
3922 sibling_attribute ();
3924 /* This kludge is here only for the sake of being compatible with what
3925 the USL CI5 C compiler does. The specification of Dwarf Version 1
3926 doesn't say that TAG_unspecified_parameters DIEs should contain any
3927 attributes other than the AT_sibling attribute, but they are certainly
3928 allowed to contain additional attributes, and the CI5 compiler
3929 generates AT_name, AT_fund_type, and AT_location attributes within
3930 TAG_unspecified_parameters DIEs which appear in the child lists for
3931 DIEs representing function definitions, so we do likewise here. */
3933 if (TREE_CODE (decl_or_type) == FUNCTION_DECL && DECL_INITIAL (decl_or_type))
3935 name_attribute ("...");
3936 fund_type_attribute (FT_pointer);
3937 /* location_attribute (?); */
3942 output_padded_null_die (arg)
3943 register void *arg ATTRIBUTE_UNUSED;
3945 ASM_OUTPUT_ALIGN (asm_out_file, 2); /* 2**2 == 4 */
3948 /*************************** end of DIEs *********************************/
3950 /* Generate some type of DIE. This routine generates the generic outer
3951 wrapper stuff which goes around all types of DIE's (regardless of their
3952 TAGs. All forms of DIEs start with a DIE-specific label, followed by a
3953 DIE-length word, followed by the guts of the DIE itself. After the guts
3954 of the DIE, there must always be a terminator label for the DIE. */
3957 output_die (die_specific_output_function, param)
3958 register void (*die_specific_output_function) PARAMS ((void *));
3959 register void *param;
3961 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
3962 char end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3964 current_dienum = NEXT_DIE_NUM;
3965 NEXT_DIE_NUM = next_unused_dienum;
3967 sprintf (begin_label, DIE_BEGIN_LABEL_FMT, current_dienum);
3968 sprintf (end_label, DIE_END_LABEL_FMT, current_dienum);
3970 /* Write a label which will act as the name for the start of this DIE. */
3972 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
3974 /* Write the DIE-length word. */
3976 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, end_label, begin_label);
3978 /* Fill in the guts of the DIE. */
3980 next_unused_dienum++;
3981 die_specific_output_function (param);
3983 /* Write a label which will act as the name for the end of this DIE. */
3985 ASM_OUTPUT_LABEL (asm_out_file, end_label);
3989 end_sibling_chain ()
3991 char begin_label[MAX_ARTIFICIAL_LABEL_BYTES];
3993 current_dienum = NEXT_DIE_NUM;
3994 NEXT_DIE_NUM = next_unused_dienum;
3996 sprintf (begin_label, DIE_BEGIN_LABEL_FMT, current_dienum);
3998 /* Write a label which will act as the name for the start of this DIE. */
4000 ASM_OUTPUT_LABEL (asm_out_file, begin_label);
4002 /* Write the DIE-length word. */
4004 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
4009 /* Generate a list of nameless TAG_formal_parameter DIEs (and perhaps a
4010 TAG_unspecified_parameters DIE) to represent the types of the formal
4011 parameters as specified in some function type specification (except
4012 for those which appear as part of a function *definition*).
4014 Note that we must be careful here to output all of the parameter
4015 DIEs *before* we output any DIEs needed to represent the types of
4016 the formal parameters. This keeps svr4 SDB happy because it
4017 (incorrectly) thinks that the first non-parameter DIE it sees ends
4018 the formal parameter list. */
4021 output_formal_types (function_or_method_type)
4022 register tree function_or_method_type;
4025 register tree formal_type = NULL;
4026 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
4028 /* Set TREE_ASM_WRITTEN while processing the parameters, lest we
4029 get bogus recursion when outputting tagged types local to a
4030 function declaration. */
4031 int save_asm_written = TREE_ASM_WRITTEN (function_or_method_type);
4032 TREE_ASM_WRITTEN (function_or_method_type) = 1;
4034 /* In the case where we are generating a formal types list for a C++
4035 non-static member function type, skip over the first thing on the
4036 TYPE_ARG_TYPES list because it only represents the type of the
4037 hidden `this pointer'. The debugger should be able to figure
4038 out (without being explicitly told) that this non-static member
4039 function type takes a `this pointer' and should be able to figure
4040 what the type of that hidden parameter is from the AT_member
4041 attribute of the parent TAG_subroutine_type DIE. */
4043 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
4044 first_parm_type = TREE_CHAIN (first_parm_type);
4046 /* Make our first pass over the list of formal parameter types and output
4047 a TAG_formal_parameter DIE for each one. */
4049 for (link = first_parm_type; link; link = TREE_CHAIN (link))
4051 formal_type = TREE_VALUE (link);
4052 if (formal_type == void_type_node)
4055 /* Output a (nameless) DIE to represent the formal parameter itself. */
4057 output_die (output_formal_parameter_die, formal_type);
4060 /* If this function type has an ellipsis, add a TAG_unspecified_parameters
4061 DIE to the end of the parameter list. */
4063 if (formal_type != void_type_node)
4064 output_die (output_unspecified_parameters_die, function_or_method_type);
4066 /* Make our second (and final) pass over the list of formal parameter types
4067 and output DIEs to represent those types (as necessary). */
4069 for (link = TYPE_ARG_TYPES (function_or_method_type);
4071 link = TREE_CHAIN (link))
4073 formal_type = TREE_VALUE (link);
4074 if (formal_type == void_type_node)
4077 output_type (formal_type, function_or_method_type);
4080 TREE_ASM_WRITTEN (function_or_method_type) = save_asm_written;
4083 /* Remember a type in the pending_types_list. */
4089 if (pending_types == pending_types_allocated)
4091 pending_types_allocated += PENDING_TYPES_INCREMENT;
4093 = (tree *) xrealloc (pending_types_list,
4094 sizeof (tree) * pending_types_allocated);
4096 pending_types_list[pending_types++] = type;
4098 /* Mark the pending type as having been output already (even though
4099 it hasn't been). This prevents the type from being added to the
4100 pending_types_list more than once. */
4102 TREE_ASM_WRITTEN (type) = 1;
4105 /* Return non-zero if it is legitimate to output DIEs to represent a
4106 given type while we are generating the list of child DIEs for some
4107 DIE (e.g. a function or lexical block DIE) associated with a given scope.
4109 See the comments within the function for a description of when it is
4110 considered legitimate to output DIEs for various kinds of types.
4112 Note that TYPE_CONTEXT(type) may be NULL (to indicate global scope)
4113 or it may point to a BLOCK node (for types local to a block), or to a
4114 FUNCTION_DECL node (for types local to the heading of some function
4115 definition), or to a FUNCTION_TYPE node (for types local to the
4116 prototyped parameter list of a function type specification), or to a
4117 RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE node
4118 (in the case of C++ nested types).
4120 The `scope' parameter should likewise be NULL or should point to a
4121 BLOCK node, a FUNCTION_DECL node, a FUNCTION_TYPE node, a RECORD_TYPE
4122 node, a UNION_TYPE node, or a QUAL_UNION_TYPE node.
4124 This function is used only for deciding when to "pend" and when to
4125 "un-pend" types to/from the pending_types_list.
4127 Note that we sometimes make use of this "type pending" feature in a
4128 rather twisted way to temporarily delay the production of DIEs for the
4129 types of formal parameters. (We do this just to make svr4 SDB happy.)
4130 It order to delay the production of DIEs representing types of formal
4131 parameters, callers of this function supply `fake_containing_scope' as
4132 the `scope' parameter to this function. Given that fake_containing_scope
4133 is a tagged type which is *not* the containing scope for *any* other type,
4134 the desired effect is achieved, i.e. output of DIEs representing types
4135 is temporarily suspended, and any type DIEs which would have otherwise
4136 been output are instead placed onto the pending_types_list. Later on,
4137 we force these (temporarily pended) types to be output simply by calling
4138 `output_pending_types_for_scope' with an actual argument equal to the
4139 true scope of the types we temporarily pended. */
4142 type_ok_for_scope (type, scope)
4144 register tree scope;
4146 /* Tagged types (i.e. struct, union, and enum types) must always be
4147 output only in the scopes where they actually belong (or else the
4148 scoping of their own tag names and the scoping of their member
4149 names will be incorrect). Non-tagged-types on the other hand can
4150 generally be output anywhere, except that svr4 SDB really doesn't
4151 want to see them nested within struct or union types, so here we
4152 say it is always OK to immediately output any such a (non-tagged)
4153 type, so long as we are not within such a context. Note that the
4154 only kinds of non-tagged types which we will be dealing with here
4155 (for C and C++ anyway) will be array types and function types. */
4157 return is_tagged_type (type)
4158 ? (TYPE_CONTEXT (type) == scope
4159 /* Ignore namespaces for the moment. */
4160 || (scope == NULL_TREE
4161 && TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL)
4162 || (scope == NULL_TREE && is_tagged_type (TYPE_CONTEXT (type))
4163 && TREE_ASM_WRITTEN (TYPE_CONTEXT (type))))
4164 : (scope == NULL_TREE || ! is_tagged_type (scope));
4167 /* Output any pending types (from the pending_types list) which we can output
4168 now (taking into account the scope that we are working on now).
4170 For each type output, remove the given type from the pending_types_list
4171 *before* we try to output it.
4173 Note that we have to process the list in beginning-to-end order,
4174 because the call made here to output_type may cause yet more types
4175 to be added to the end of the list, and we may have to output some
4179 output_pending_types_for_scope (containing_scope)
4180 register tree containing_scope;
4182 register unsigned i;
4184 for (i = 0; i < pending_types; )
4186 register tree type = pending_types_list[i];
4188 if (type_ok_for_scope (type, containing_scope))
4190 register tree *mover;
4191 register tree *limit;
4194 limit = &pending_types_list[pending_types];
4195 for (mover = &pending_types_list[i]; mover < limit; mover++)
4196 *mover = *(mover+1);
4198 /* Un-mark the type as having been output already (because it
4199 hasn't been, really). Then call output_type to generate a
4200 Dwarf representation of it. */
4202 TREE_ASM_WRITTEN (type) = 0;
4203 output_type (type, containing_scope);
4205 /* Don't increment the loop counter in this case because we
4206 have shifted all of the subsequent pending types down one
4207 element in the pending_types_list array. */
4214 /* Remember a type in the incomplete_types_list. */
4217 add_incomplete_type (type)
4220 if (incomplete_types == incomplete_types_allocated)
4222 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
4223 incomplete_types_list
4224 = (tree *) xrealloc (incomplete_types_list,
4225 sizeof (tree) * incomplete_types_allocated);
4228 incomplete_types_list[incomplete_types++] = type;
4231 /* Walk through the list of incomplete types again, trying once more to
4232 emit full debugging info for them. */
4235 retry_incomplete_types ()
4240 while (incomplete_types)
4243 type = incomplete_types_list[incomplete_types];
4244 output_type (type, NULL_TREE);
4249 output_type (type, containing_scope)
4251 register tree containing_scope;
4253 if (type == 0 || type == error_mark_node)
4256 /* We are going to output a DIE to represent the unqualified version of
4257 this type (i.e. without any const or volatile qualifiers) so get
4258 the main variant (i.e. the unqualified version) of this type now. */
4260 type = type_main_variant (type);
4262 if (TREE_ASM_WRITTEN (type))
4264 if (finalizing && AGGREGATE_TYPE_P (type))
4266 register tree member;
4268 /* Some of our nested types might not have been defined when we
4269 were written out before; force them out now. */
4271 for (member = TYPE_FIELDS (type); member;
4272 member = TREE_CHAIN (member))
4273 if (TREE_CODE (member) == TYPE_DECL
4274 && ! TREE_ASM_WRITTEN (TREE_TYPE (member)))
4275 output_type (TREE_TYPE (member), containing_scope);
4280 /* If this is a nested type whose containing class hasn't been
4281 written out yet, writing it out will cover this one, too. */
4283 if (TYPE_CONTEXT (type)
4284 && TYPE_P (TYPE_CONTEXT (type))
4285 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
4287 output_type (TYPE_CONTEXT (type), containing_scope);
4291 /* Don't generate any DIEs for this type now unless it is OK to do so
4292 (based upon what `type_ok_for_scope' tells us). */
4294 if (! type_ok_for_scope (type, containing_scope))
4300 switch (TREE_CODE (type))
4306 case REFERENCE_TYPE:
4307 /* Prevent infinite recursion in cases where this is a recursive
4308 type. Recursive types are possible in Ada. */
4309 TREE_ASM_WRITTEN (type) = 1;
4310 /* For these types, all that is required is that we output a DIE
4311 (or a set of DIEs) to represent the "basis" type. */
4312 output_type (TREE_TYPE (type), containing_scope);
4316 /* This code is used for C++ pointer-to-data-member types. */
4317 /* Output a description of the relevant class type. */
4318 output_type (TYPE_OFFSET_BASETYPE (type), containing_scope);
4319 /* Output a description of the type of the object pointed to. */
4320 output_type (TREE_TYPE (type), containing_scope);
4321 /* Now output a DIE to represent this pointer-to-data-member type
4323 output_die (output_ptr_to_mbr_type_die, type);
4327 output_type (TYPE_DOMAIN (type), containing_scope);
4328 output_die (output_set_type_die, type);
4332 output_type (TREE_TYPE (type), containing_scope);
4333 abort (); /* No way to represent these in Dwarf yet! */
4337 /* Force out return type (in case it wasn't forced out already). */
4338 output_type (TREE_TYPE (type), containing_scope);
4339 output_die (output_subroutine_type_die, type);
4340 output_formal_types (type);
4341 end_sibling_chain ();
4345 /* Force out return type (in case it wasn't forced out already). */
4346 output_type (TREE_TYPE (type), containing_scope);
4347 output_die (output_subroutine_type_die, type);
4348 output_formal_types (type);
4349 end_sibling_chain ();
4353 if (TYPE_STRING_FLAG (type) && TREE_CODE(TREE_TYPE(type)) == CHAR_TYPE)
4355 output_type (TREE_TYPE (type), containing_scope);
4356 output_die (output_string_type_die, type);
4360 register tree element_type;
4362 element_type = TREE_TYPE (type);
4363 while (TREE_CODE (element_type) == ARRAY_TYPE)
4364 element_type = TREE_TYPE (element_type);
4366 output_type (element_type, containing_scope);
4367 output_die (output_array_type_die, type);
4374 case QUAL_UNION_TYPE:
4376 /* For a non-file-scope tagged type, we can always go ahead and
4377 output a Dwarf description of this type right now, even if
4378 the type in question is still incomplete, because if this
4379 local type *was* ever completed anywhere within its scope,
4380 that complete definition would already have been attached to
4381 this RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE or ENUMERAL_TYPE
4382 node by the time we reach this point. That's true because of the
4383 way the front-end does its processing of file-scope declarations (of
4384 functions and class types) within which other types might be
4385 nested. The C and C++ front-ends always gobble up such "local
4386 scope" things en-mass before they try to output *any* debugging
4387 information for any of the stuff contained inside them and thus,
4388 we get the benefit here of what is (in effect) a pre-resolution
4389 of forward references to tagged types in local scopes.
4391 Note however that for file-scope tagged types we cannot assume
4392 that such pre-resolution of forward references has taken place.
4393 A given file-scope tagged type may appear to be incomplete when
4394 we reach this point, but it may yet be given a full definition
4395 (at file-scope) later on during compilation. In order to avoid
4396 generating a premature (and possibly incorrect) set of Dwarf
4397 DIEs for such (as yet incomplete) file-scope tagged types, we
4398 generate nothing at all for as-yet incomplete file-scope tagged
4399 types here unless we are making our special "finalization" pass
4400 for file-scope things at the very end of compilation. At that
4401 time, we will certainly know as much about each file-scope tagged
4402 type as we are ever going to know, so at that point in time, we
4403 can safely generate correct Dwarf descriptions for these file-
4404 scope tagged types. */
4406 if (!COMPLETE_TYPE_P (type)
4407 && (TYPE_CONTEXT (type) == NULL
4408 || AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
4409 || TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL)
4412 /* We don't need to do this for function-local types. */
4413 if (! decl_function_context (TYPE_STUB_DECL (type)))
4414 add_incomplete_type (type);
4415 return; /* EARLY EXIT! Avoid setting TREE_ASM_WRITTEN. */
4418 /* Prevent infinite recursion in cases where the type of some
4419 member of this type is expressed in terms of this type itself. */
4421 TREE_ASM_WRITTEN (type) = 1;
4423 /* Output a DIE to represent the tagged type itself. */
4425 switch (TREE_CODE (type))
4428 output_die (output_enumeration_type_die, type);
4429 return; /* a special case -- nothing left to do so just return */
4432 output_die (output_structure_type_die, type);
4436 case QUAL_UNION_TYPE:
4437 output_die (output_union_type_die, type);
4441 abort (); /* Should never happen. */
4444 /* If this is not an incomplete type, output descriptions of
4445 each of its members.
4447 Note that as we output the DIEs necessary to represent the
4448 members of this record or union type, we will also be trying
4449 to output DIEs to represent the *types* of those members.
4450 However the `output_type' function (above) will specifically
4451 avoid generating type DIEs for member types *within* the list
4452 of member DIEs for this (containing) type execpt for those
4453 types (of members) which are explicitly marked as also being
4454 members of this (containing) type themselves. The g++ front-
4455 end can force any given type to be treated as a member of some
4456 other (containing) type by setting the TYPE_CONTEXT of the
4457 given (member) type to point to the TREE node representing the
4458 appropriate (containing) type.
4461 if (COMPLETE_TYPE_P (type))
4463 /* First output info about the base classes. */
4464 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
4466 register tree bases = TYPE_BINFO_BASETYPES (type);
4467 register int n_bases = TREE_VEC_LENGTH (bases);
4470 for (i = 0; i < n_bases; i++)
4472 tree binfo = TREE_VEC_ELT (bases, i);
4473 output_type (BINFO_TYPE (binfo), containing_scope);
4474 output_die (output_inheritance_die, binfo);
4481 register tree normal_member;
4483 /* Now output info about the data members and type members. */
4485 for (normal_member = TYPE_FIELDS (type);
4487 normal_member = TREE_CHAIN (normal_member))
4488 output_decl (normal_member, type);
4492 register tree func_member;
4494 /* Now output info about the function members (if any). */
4496 for (func_member = TYPE_METHODS (type);
4498 func_member = TREE_CHAIN (func_member))
4499 output_decl (func_member, type);
4504 /* RECORD_TYPEs, UNION_TYPEs, and QUAL_UNION_TYPEs are themselves
4505 scopes (at least in C++) so we must now output any nested
4506 pending types which are local just to this type. */
4508 output_pending_types_for_scope (type);
4510 end_sibling_chain (); /* Terminate member chain. */
4521 break; /* No DIEs needed for fundamental types. */
4523 case LANG_TYPE: /* No Dwarf representation currently defined. */
4530 TREE_ASM_WRITTEN (type) = 1;
4534 output_tagged_type_instantiation (type)
4537 if (type == 0 || type == error_mark_node)
4540 /* We are going to output a DIE to represent the unqualified version of
4541 this type (i.e. without any const or volatile qualifiers) so make
4542 sure that we have the main variant (i.e. the unqualified version) of
4545 if (type != type_main_variant (type))
4548 if (!TREE_ASM_WRITTEN (type))
4551 switch (TREE_CODE (type))
4557 output_die (output_inlined_enumeration_type_die, type);
4561 output_die (output_inlined_structure_type_die, type);
4565 case QUAL_UNION_TYPE:
4566 output_die (output_inlined_union_type_die, type);
4570 abort (); /* Should never happen. */
4574 /* Output a TAG_lexical_block DIE followed by DIEs to represent all of
4575 the things which are local to the given block. */
4578 output_block (stmt, depth)
4582 register int must_output_die = 0;
4583 register tree origin;
4584 register enum tree_code origin_code;
4586 /* Ignore blocks never really used to make RTL. */
4588 if (! stmt || ! TREE_USED (stmt)
4589 || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt)))
4592 /* Determine the "ultimate origin" of this block. This block may be an
4593 inlined instance of an inlined instance of inline function, so we
4594 have to trace all of the way back through the origin chain to find
4595 out what sort of node actually served as the original seed for the
4596 creation of the current block. */
4598 origin = block_ultimate_origin (stmt);
4599 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
4601 /* Determine if we need to output any Dwarf DIEs at all to represent this
4604 if (origin_code == FUNCTION_DECL)
4605 /* The outer scopes for inlinings *must* always be represented. We
4606 generate TAG_inlined_subroutine DIEs for them. (See below.) */
4607 must_output_die = 1;
4610 /* In the case where the current block represents an inlining of the
4611 "body block" of an inline function, we must *NOT* output any DIE
4612 for this block because we have already output a DIE to represent
4613 the whole inlined function scope and the "body block" of any
4614 function doesn't really represent a different scope according to
4615 ANSI C rules. So we check here to make sure that this block does
4616 not represent a "body block inlining" before trying to set the
4617 `must_output_die' flag. */
4619 if (! is_body_block (origin ? origin : stmt))
4621 /* Determine if this block directly contains any "significant"
4622 local declarations which we will need to output DIEs for. */
4624 if (debug_info_level > DINFO_LEVEL_TERSE)
4625 /* We are not in terse mode so *any* local declaration counts
4626 as being a "significant" one. */
4627 must_output_die = (BLOCK_VARS (stmt) != NULL);
4632 /* We are in terse mode, so only local (nested) function
4633 definitions count as "significant" local declarations. */
4635 for (decl = BLOCK_VARS (stmt); decl; decl = TREE_CHAIN (decl))
4636 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl))
4638 must_output_die = 1;
4645 /* It would be a waste of space to generate a Dwarf TAG_lexical_block
4646 DIE for any block which contains no significant local declarations
4647 at all. Rather, in such cases we just call `output_decls_for_scope'
4648 so that any needed Dwarf info for any sub-blocks will get properly
4649 generated. Note that in terse mode, our definition of what constitutes
4650 a "significant" local declaration gets restricted to include only
4651 inlined function instances and local (nested) function definitions. */
4653 if (origin_code == FUNCTION_DECL && BLOCK_ABSTRACT (stmt))
4654 /* We don't care about an abstract inlined subroutine. */;
4655 else if (must_output_die)
4657 output_die ((origin_code == FUNCTION_DECL)
4658 ? output_inlined_subroutine_die
4659 : output_lexical_block_die,
4661 output_decls_for_scope (stmt, depth);
4662 end_sibling_chain ();
4665 output_decls_for_scope (stmt, depth);
4668 /* Output all of the decls declared within a given scope (also called
4669 a `binding contour') and (recursively) all of it's sub-blocks. */
4672 output_decls_for_scope (stmt, depth)
4676 /* Ignore blocks never really used to make RTL. */
4678 if (! stmt || ! TREE_USED (stmt))
4681 /* Output the DIEs to represent all of the data objects, functions,
4682 typedefs, and tagged types declared directly within this block
4683 but not within any nested sub-blocks. */
4688 for (decl = BLOCK_VARS (stmt); decl; decl = TREE_CHAIN (decl))
4689 output_decl (decl, stmt);
4692 output_pending_types_for_scope (stmt);
4694 /* Output the DIEs to represent all sub-blocks (and the items declared
4695 therein) of this block. */
4698 register tree subblocks;
4700 for (subblocks = BLOCK_SUBBLOCKS (stmt);
4702 subblocks = BLOCK_CHAIN (subblocks))
4703 output_block (subblocks, depth + 1);
4707 /* Is this a typedef we can avoid emitting? */
4710 is_redundant_typedef (decl)
4713 if (TYPE_DECL_IS_STUB (decl))
4715 if (DECL_ARTIFICIAL (decl)
4716 && DECL_CONTEXT (decl)
4717 && is_tagged_type (DECL_CONTEXT (decl))
4718 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
4719 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
4720 /* Also ignore the artificial member typedef for the class name. */
4725 /* Output Dwarf .debug information for a decl described by DECL. */
4728 output_decl (decl, containing_scope)
4730 register tree containing_scope;
4732 /* Make a note of the decl node we are going to be working on. We may
4733 need to give the user the source coordinates of where it appeared in
4734 case we notice (later on) that something about it looks screwy. */
4736 dwarf_last_decl = decl;
4738 if (TREE_CODE (decl) == ERROR_MARK)
4741 /* If a structure is declared within an initialization, e.g. as the
4742 operand of a sizeof, then it will not have a name. We don't want
4743 to output a DIE for it, as the tree nodes are in the temporary obstack */
4745 if ((TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE
4746 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
4747 && ((DECL_NAME (decl) == 0 && TYPE_NAME (TREE_TYPE (decl)) == 0)
4748 || (TYPE_FIELDS (TREE_TYPE (decl))
4749 && (TREE_CODE (TYPE_FIELDS (TREE_TYPE (decl))) == ERROR_MARK))))
4752 /* If this ..._DECL node is marked to be ignored, then ignore it. */
4754 if (DECL_IGNORED_P (decl))
4757 switch (TREE_CODE (decl))
4760 /* The individual enumerators of an enum type get output when we
4761 output the Dwarf representation of the relevant enum type itself. */
4765 /* If we are in terse mode, don't output any DIEs to represent
4766 mere function declarations. Also, if we are conforming
4767 to the DWARF version 1 specification, don't output DIEs for
4768 mere function declarations. */
4770 if (DECL_INITIAL (decl) == NULL_TREE)
4771 #if (DWARF_VERSION > 1)
4772 if (debug_info_level <= DINFO_LEVEL_TERSE)
4776 /* Before we describe the FUNCTION_DECL itself, make sure that we
4777 have described its return type. */
4779 output_type (TREE_TYPE (TREE_TYPE (decl)), containing_scope);
4782 /* And its containing type. */
4783 register tree origin = decl_class_context (decl);
4785 output_type (origin, containing_scope);
4788 /* If we're emitting an out-of-line copy of an inline function,
4789 set up to refer to the abstract instance emitted from
4790 note_deferral_of_defined_inline_function. */
4791 if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
4792 && ! (containing_scope && TYPE_P (containing_scope)))
4793 set_decl_origin_self (decl);
4795 /* If the following DIE will represent a function definition for a
4796 function with "extern" linkage, output a special "pubnames" DIE
4797 label just ahead of the actual DIE. A reference to this label
4798 was already generated in the .debug_pubnames section sub-entry
4799 for this function definition. */
4801 if (TREE_PUBLIC (decl))
4803 char label[MAX_ARTIFICIAL_LABEL_BYTES];
4805 sprintf (label, PUB_DIE_LABEL_FMT, next_pubname_number++);
4806 ASM_OUTPUT_LABEL (asm_out_file, label);
4809 /* Now output a DIE to represent the function itself. */
4811 output_die (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl)
4812 ? output_global_subroutine_die
4813 : output_local_subroutine_die,
4816 /* Now output descriptions of the arguments for this function.
4817 This gets (unnecessarily?) complex because of the fact that
4818 the DECL_ARGUMENT list for a FUNCTION_DECL doesn't indicate
4819 cases where there was a trailing `...' at the end of the formal
4820 parameter list. In order to find out if there was a trailing
4821 ellipsis or not, we must instead look at the type associated
4822 with the FUNCTION_DECL. This will be a node of type FUNCTION_TYPE.
4823 If the chain of type nodes hanging off of this FUNCTION_TYPE node
4824 ends with a void_type_node then there should *not* be an ellipsis
4827 /* In the case where we are describing a mere function declaration, all
4828 we need to do here (and all we *can* do here) is to describe
4829 the *types* of its formal parameters. */
4831 if (decl != current_function_decl || in_class)
4832 output_formal_types (TREE_TYPE (decl));
4835 /* Generate DIEs to represent all known formal parameters */
4837 register tree arg_decls = DECL_ARGUMENTS (decl);
4840 /* WARNING! Kludge zone ahead! Here we have a special
4841 hack for svr4 SDB compatibility. Instead of passing the
4842 current FUNCTION_DECL node as the second parameter (i.e.
4843 the `containing_scope' parameter) to `output_decl' (as
4844 we ought to) we instead pass a pointer to our own private
4845 fake_containing_scope node. That node is a RECORD_TYPE
4846 node which NO OTHER TYPE may ever actually be a member of.
4848 This pointer will ultimately get passed into `output_type'
4849 as its `containing_scope' parameter. `Output_type' will
4850 then perform its part in the hack... i.e. it will pend
4851 the type of the formal parameter onto the pending_types
4852 list. Later on, when we are done generating the whole
4853 sequence of formal parameter DIEs for this function
4854 definition, we will un-pend all previously pended types
4855 of formal parameters for this function definition.
4857 This whole kludge prevents any type DIEs from being
4858 mixed in with the formal parameter DIEs. That's good
4859 because svr4 SDB believes that the list of formal
4860 parameter DIEs for a function ends wherever the first
4861 non-formal-parameter DIE appears. Thus, we have to
4862 keep the formal parameter DIEs segregated. They must
4863 all appear (consecutively) at the start of the list of
4864 children for the DIE representing the function definition.
4865 Then (and only then) may we output any additional DIEs
4866 needed to represent the types of these formal parameters.
4870 When generating DIEs, generate the unspecified_parameters
4871 DIE instead if we come across the arg "__builtin_va_alist"
4874 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
4875 if (TREE_CODE (parm) == PARM_DECL)
4877 if (DECL_NAME(parm) &&
4878 !strcmp(IDENTIFIER_POINTER(DECL_NAME(parm)),
4879 "__builtin_va_alist") )
4880 output_die (output_unspecified_parameters_die, decl);
4882 output_decl (parm, fake_containing_scope);
4886 Now that we have finished generating all of the DIEs to
4887 represent the formal parameters themselves, force out
4888 any DIEs needed to represent their types. We do this
4889 simply by un-pending all previously pended types which
4890 can legitimately go into the chain of children DIEs for
4891 the current FUNCTION_DECL.
4894 output_pending_types_for_scope (decl);
4897 Decide whether we need a unspecified_parameters DIE at the end.
4898 There are 2 more cases to do this for:
4899 1) the ansi ... declaration - this is detectable when the end
4900 of the arg list is not a void_type_node
4901 2) an unprototyped function declaration (not a definition). This
4902 just means that we have no info about the parameters at all.
4906 register tree fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
4910 /* this is the prototyped case, check for ... */
4911 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
4912 output_die (output_unspecified_parameters_die, decl);
4916 /* this is unprototyped, check for undefined (just declaration) */
4917 if (!DECL_INITIAL (decl))
4918 output_die (output_unspecified_parameters_die, decl);
4922 /* Output Dwarf info for all of the stuff within the body of the
4923 function (if it has one - it may be just a declaration). */
4926 register tree outer_scope = DECL_INITIAL (decl);
4928 if (outer_scope && TREE_CODE (outer_scope) != ERROR_MARK)
4930 /* Note that here, `outer_scope' is a pointer to the outermost
4931 BLOCK node created to represent a function.
4932 This outermost BLOCK actually represents the outermost
4933 binding contour for the function, i.e. the contour in which
4934 the function's formal parameters and labels get declared.
4936 Curiously, it appears that the front end doesn't actually
4937 put the PARM_DECL nodes for the current function onto the
4938 BLOCK_VARS list for this outer scope. (They are strung
4939 off of the DECL_ARGUMENTS list for the function instead.)
4940 The BLOCK_VARS list for the `outer_scope' does provide us
4941 with a list of the LABEL_DECL nodes for the function however,
4942 and we output DWARF info for those here.
4944 Just within the `outer_scope' there will be a BLOCK node
4945 representing the function's outermost pair of curly braces,
4946 and any blocks used for the base and member initializers of
4947 a C++ constructor function. */
4949 output_decls_for_scope (outer_scope, 0);
4951 /* Finally, force out any pending types which are local to the
4952 outermost block of this function definition. These will
4953 all have a TYPE_CONTEXT which points to the FUNCTION_DECL
4956 output_pending_types_for_scope (decl);
4961 /* Generate a terminator for the list of stuff `owned' by this
4964 end_sibling_chain ();
4969 /* If we are in terse mode, don't generate any DIEs to represent
4970 any actual typedefs. Note that even when we are in terse mode,
4971 we must still output DIEs to represent those tagged types which
4972 are used (directly or indirectly) in the specification of either
4973 a return type or a formal parameter type of some function. */
4975 if (debug_info_level <= DINFO_LEVEL_TERSE)
4976 if (! TYPE_DECL_IS_STUB (decl)
4977 || (! TYPE_USED_FOR_FUNCTION (TREE_TYPE (decl)) && ! in_class))
4980 /* In the special case of a TYPE_DECL node representing
4981 the declaration of some type tag, if the given TYPE_DECL is
4982 marked as having been instantiated from some other (original)
4983 TYPE_DECL node (e.g. one which was generated within the original
4984 definition of an inline function) we have to generate a special
4985 (abbreviated) TAG_structure_type, TAG_union_type, or
4986 TAG_enumeration-type DIE here. */
4988 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl))
4990 output_tagged_type_instantiation (TREE_TYPE (decl));
4994 output_type (TREE_TYPE (decl), containing_scope);
4996 if (! is_redundant_typedef (decl))
4997 /* Output a DIE to represent the typedef itself. */
4998 output_die (output_typedef_die, decl);
5002 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5003 output_die (output_label_die, decl);
5007 /* If we are conforming to the DWARF version 1 specification, don't
5008 generated any DIEs to represent mere external object declarations. */
5010 #if (DWARF_VERSION <= 1)
5011 if (DECL_EXTERNAL (decl) && ! TREE_PUBLIC (decl))
5015 /* If we are in terse mode, don't generate any DIEs to represent
5016 any variable declarations or definitions. */
5018 if (debug_info_level <= DINFO_LEVEL_TERSE)
5021 /* Output any DIEs that are needed to specify the type of this data
5024 output_type (TREE_TYPE (decl), containing_scope);
5027 /* And its containing type. */
5028 register tree origin = decl_class_context (decl);
5030 output_type (origin, containing_scope);
5033 /* If the following DIE will represent a data object definition for a
5034 data object with "extern" linkage, output a special "pubnames" DIE
5035 label just ahead of the actual DIE. A reference to this label
5036 was already generated in the .debug_pubnames section sub-entry
5037 for this data object definition. */
5039 if (TREE_PUBLIC (decl) && ! DECL_ABSTRACT (decl))
5041 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5043 sprintf (label, PUB_DIE_LABEL_FMT, next_pubname_number++);
5044 ASM_OUTPUT_LABEL (asm_out_file, label);
5047 /* Now output the DIE to represent the data object itself. This gets
5048 complicated because of the possibility that the VAR_DECL really
5049 represents an inlined instance of a formal parameter for an inline
5053 register void (*func) PARAMS ((void *));
5054 register tree origin = decl_ultimate_origin (decl);
5056 if (origin != NULL && TREE_CODE (origin) == PARM_DECL)
5057 func = output_formal_parameter_die;
5060 if (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
5061 func = output_global_variable_die;
5063 func = output_local_variable_die;
5065 output_die (func, decl);
5070 /* Ignore the nameless fields that are used to skip bits. */
5071 if (DECL_NAME (decl) != 0)
5073 output_type (member_declared_type (decl), containing_scope);
5074 output_die (output_member_die, decl);
5079 /* Force out the type of this formal, if it was not forced out yet.
5080 Note that here we can run afowl of a bug in "classic" svr4 SDB.
5081 It should be able to grok the presence of type DIEs within a list
5082 of TAG_formal_parameter DIEs, but it doesn't. */
5084 output_type (TREE_TYPE (decl), containing_scope);
5085 output_die (output_formal_parameter_die, decl);
5088 case NAMESPACE_DECL:
5089 /* Ignore for now. */
5098 dwarfout_file_scope_decl (decl, set_finalizing)
5100 register int set_finalizing;
5102 if (TREE_CODE (decl) == ERROR_MARK)
5105 /* If this ..._DECL node is marked to be ignored, then ignore it. */
5107 if (DECL_IGNORED_P (decl))
5110 switch (TREE_CODE (decl))
5114 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of
5115 a builtin function. Explicit programmer-supplied declarations of
5116 these same functions should NOT be ignored however. */
5118 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
5121 /* What we would really like to do here is to filter out all mere
5122 file-scope declarations of file-scope functions which are never
5123 referenced later within this translation unit (and keep all of
5124 ones that *are* referenced later on) but we aren't clairvoyant,
5125 so we have no idea which functions will be referenced in the
5126 future (i.e. later on within the current translation unit).
5127 So here we just ignore all file-scope function declarations
5128 which are not also definitions. If and when the debugger needs
5129 to know something about these functions, it wil have to hunt
5130 around and find the DWARF information associated with the
5131 *definition* of the function.
5133 Note that we can't just check `DECL_EXTERNAL' to find out which
5134 FUNCTION_DECL nodes represent definitions and which ones represent
5135 mere declarations. We have to check `DECL_INITIAL' instead. That's
5136 because the C front-end supports some weird semantics for "extern
5137 inline" function definitions. These can get inlined within the
5138 current translation unit (an thus, we need to generate DWARF info
5139 for their abstract instances so that the DWARF info for the
5140 concrete inlined instances can have something to refer to) but
5141 the compiler never generates any out-of-lines instances of such
5142 things (despite the fact that they *are* definitions). The
5143 important point is that the C front-end marks these "extern inline"
5144 functions as DECL_EXTERNAL, but we need to generate DWARF for them
5147 Note that the C++ front-end also plays some similar games for inline
5148 function definitions appearing within include files which also
5149 contain `#pragma interface' pragmas. */
5151 if (DECL_INITIAL (decl) == NULL_TREE)
5154 if (TREE_PUBLIC (decl)
5155 && ! DECL_EXTERNAL (decl)
5156 && ! DECL_ABSTRACT (decl))
5158 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5160 /* Output a .debug_pubnames entry for a public function
5161 defined in this compilation unit. */
5163 fputc ('\n', asm_out_file);
5164 ASM_OUTPUT_PUSH_SECTION (asm_out_file, PUBNAMES_SECTION);
5165 sprintf (label, PUB_DIE_LABEL_FMT, next_pubname_number);
5166 ASM_OUTPUT_DWARF_ADDR (asm_out_file, label);
5167 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file,
5168 IDENTIFIER_POINTER (DECL_NAME (decl)));
5169 ASM_OUTPUT_POP_SECTION (asm_out_file);
5176 /* Ignore this VAR_DECL if it refers to a file-scope extern data
5177 object declaration and if the declaration was never even
5178 referenced from within this entire compilation unit. We
5179 suppress these DIEs in order to save space in the .debug section
5180 (by eliminating entries which are probably useless). Note that
5181 we must not suppress block-local extern declarations (whether
5182 used or not) because that would screw-up the debugger's name
5183 lookup mechanism and cause it to miss things which really ought
5184 to be in scope at a given point. */
5186 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
5189 if (TREE_PUBLIC (decl)
5190 && ! DECL_EXTERNAL (decl)
5191 && GET_CODE (DECL_RTL (decl)) == MEM
5192 && ! DECL_ABSTRACT (decl))
5194 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5196 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5198 /* Output a .debug_pubnames entry for a public variable
5199 defined in this compilation unit. */
5201 fputc ('\n', asm_out_file);
5202 ASM_OUTPUT_PUSH_SECTION (asm_out_file, PUBNAMES_SECTION);
5203 sprintf (label, PUB_DIE_LABEL_FMT, next_pubname_number);
5204 ASM_OUTPUT_DWARF_ADDR (asm_out_file, label);
5205 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file,
5206 IDENTIFIER_POINTER (DECL_NAME (decl)));
5207 ASM_OUTPUT_POP_SECTION (asm_out_file);
5210 if (DECL_INITIAL (decl) == NULL)
5212 /* Output a .debug_aranges entry for a public variable
5213 which is tentatively defined in this compilation unit. */
5215 fputc ('\n', asm_out_file);
5216 ASM_OUTPUT_PUSH_SECTION (asm_out_file, ARANGES_SECTION);
5217 ASM_OUTPUT_DWARF_ADDR (asm_out_file,
5218 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
5219 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5220 (unsigned) int_size_in_bytes (TREE_TYPE (decl)));
5221 ASM_OUTPUT_POP_SECTION (asm_out_file);
5225 /* If we are in terse mode, don't generate any DIEs to represent
5226 any variable declarations or definitions. */
5228 if (debug_info_level <= DINFO_LEVEL_TERSE)
5234 /* Don't bother trying to generate any DIEs to represent any of the
5235 normal built-in types for the language we are compiling, except
5236 in cases where the types in question are *not* DWARF fundamental
5237 types. We make an exception in the case of non-fundamental types
5238 for the sake of objective C (and perhaps C++) because the GNU
5239 front-ends for these languages may in fact create certain "built-in"
5240 types which are (for example) RECORD_TYPEs. In such cases, we
5241 really need to output these (non-fundamental) types because other
5242 DIEs may contain references to them. */
5244 /* Also ignore language dependent types here, because they are probably
5245 also built-in types. If we didn't ignore them, then we would get
5246 references to undefined labels because output_type doesn't support
5247 them. So, for now, we need to ignore them to avoid assembler
5250 /* ??? This code is different than the equivalent code in dwarf2out.c.
5251 The dwarf2out.c code is probably more correct. */
5253 if (DECL_SOURCE_LINE (decl) == 0
5254 && (type_is_fundamental (TREE_TYPE (decl))
5255 || TREE_CODE (TREE_TYPE (decl)) == LANG_TYPE))
5258 /* If we are in terse mode, don't generate any DIEs to represent
5259 any actual typedefs. Note that even when we are in terse mode,
5260 we must still output DIEs to represent those tagged types which
5261 are used (directly or indirectly) in the specification of either
5262 a return type or a formal parameter type of some function. */
5264 if (debug_info_level <= DINFO_LEVEL_TERSE)
5265 if (! TYPE_DECL_IS_STUB (decl)
5266 || ! TYPE_USED_FOR_FUNCTION (TREE_TYPE (decl)))
5275 fputc ('\n', asm_out_file);
5276 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DEBUG_SECTION);
5277 finalizing = set_finalizing;
5278 output_decl (decl, NULL_TREE);
5280 /* NOTE: The call above to `output_decl' may have caused one or more
5281 file-scope named types (i.e. tagged types) to be placed onto the
5282 pending_types_list. We have to get those types off of that list
5283 at some point, and this is the perfect time to do it. If we didn't
5284 take them off now, they might still be on the list when cc1 finally
5285 exits. That might be OK if it weren't for the fact that when we put
5286 types onto the pending_types_list, we set the TREE_ASM_WRITTEN flag
5287 for these types, and that causes them never to be output unless
5288 `output_pending_types_for_scope' takes them off of the list and un-sets
5289 their TREE_ASM_WRITTEN flags. */
5291 output_pending_types_for_scope (NULL_TREE);
5293 /* The above call should have totally emptied the pending_types_list
5294 if this is not a nested function or class. If this is a nested type,
5295 then the remaining pending_types will be emitted when the containing type
5298 if (! DECL_CONTEXT (decl))
5300 if (pending_types != 0)
5304 ASM_OUTPUT_POP_SECTION (asm_out_file);
5306 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl) != NULL)
5307 current_funcdef_number++;
5310 /* Output a marker (i.e. a label) for the beginning of the generated code
5311 for a lexical block. */
5314 dwarfout_begin_block (blocknum)
5315 register unsigned blocknum;
5317 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5319 function_section (current_function_decl);
5320 sprintf (label, BLOCK_BEGIN_LABEL_FMT, blocknum);
5321 ASM_OUTPUT_LABEL (asm_out_file, label);
5324 /* Output a marker (i.e. a label) for the end of the generated code
5325 for a lexical block. */
5328 dwarfout_end_block (blocknum)
5329 register unsigned blocknum;
5331 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5333 function_section (current_function_decl);
5334 sprintf (label, BLOCK_END_LABEL_FMT, blocknum);
5335 ASM_OUTPUT_LABEL (asm_out_file, label);
5338 /* Output a marker (i.e. a label) at a point in the assembly code which
5339 corresponds to a given source level label. */
5342 dwarfout_label (insn)
5345 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5347 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5349 function_section (current_function_decl);
5350 sprintf (label, INSN_LABEL_FMT, current_funcdef_number,
5351 (unsigned) INSN_UID (insn));
5352 ASM_OUTPUT_LABEL (asm_out_file, label);
5356 /* Output a marker (i.e. a label) for the point in the generated code where
5357 the real body of the function begins (after parameters have been moved
5358 to their home locations). */
5361 dwarfout_begin_function ()
5363 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5365 if (! use_gnu_debug_info_extensions)
5367 function_section (current_function_decl);
5368 sprintf (label, BODY_BEGIN_LABEL_FMT, current_funcdef_number);
5369 ASM_OUTPUT_LABEL (asm_out_file, label);
5372 /* Output a marker (i.e. a label) for the point in the generated code where
5373 the real body of the function ends (just before the epilogue code). */
5376 dwarfout_end_function ()
5378 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5380 if (! use_gnu_debug_info_extensions)
5382 function_section (current_function_decl);
5383 sprintf (label, BODY_END_LABEL_FMT, current_funcdef_number);
5384 ASM_OUTPUT_LABEL (asm_out_file, label);
5387 /* Output a marker (i.e. a label) for the absolute end of the generated code
5388 for a function definition. This gets called *after* the epilogue code
5389 has been generated. */
5392 dwarfout_end_epilogue ()
5394 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5396 /* Output a label to mark the endpoint of the code generated for this
5399 sprintf (label, FUNC_END_LABEL_FMT, current_funcdef_number);
5400 ASM_OUTPUT_LABEL (asm_out_file, label);
5404 shuffle_filename_entry (new_zeroth)
5405 register filename_entry *new_zeroth;
5407 filename_entry temp_entry;
5408 register filename_entry *limit_p;
5409 register filename_entry *move_p;
5411 if (new_zeroth == &filename_table[0])
5414 temp_entry = *new_zeroth;
5416 /* Shift entries up in the table to make room at [0]. */
5418 limit_p = &filename_table[0];
5419 for (move_p = new_zeroth; move_p > limit_p; move_p--)
5420 *move_p = *(move_p-1);
5422 /* Install the found entry at [0]. */
5424 filename_table[0] = temp_entry;
5427 /* Create a new (string) entry for the .debug_sfnames section. */
5430 generate_new_sfname_entry ()
5432 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5434 fputc ('\n', asm_out_file);
5435 ASM_OUTPUT_PUSH_SECTION (asm_out_file, SFNAMES_SECTION);
5436 sprintf (label, SFNAMES_ENTRY_LABEL_FMT, filename_table[0].number);
5437 ASM_OUTPUT_LABEL (asm_out_file, label);
5438 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file,
5439 filename_table[0].name
5440 ? filename_table[0].name
5442 ASM_OUTPUT_POP_SECTION (asm_out_file);
5445 /* Lookup a filename (in the list of filenames that we know about here in
5446 dwarfout.c) and return its "index". The index of each (known) filename
5447 is just a unique number which is associated with only that one filename.
5448 We need such numbers for the sake of generating labels (in the
5449 .debug_sfnames section) and references to those unique labels (in the
5450 .debug_srcinfo and .debug_macinfo sections).
5452 If the filename given as an argument is not found in our current list,
5453 add it to the list and assign it the next available unique index number.
5455 Whatever we do (i.e. whether we find a pre-existing filename or add a new
5456 one), we shuffle the filename found (or added) up to the zeroth entry of
5457 our list of filenames (which is always searched linearly). We do this so
5458 as to optimize the most common case for these filename lookups within
5459 dwarfout.c. The most common case by far is the case where we call
5460 lookup_filename to lookup the very same filename that we did a lookup
5461 on the last time we called lookup_filename. We make sure that this
5462 common case is fast because such cases will constitute 99.9% of the
5463 lookups we ever do (in practice).
5465 If we add a new filename entry to our table, we go ahead and generate
5466 the corresponding entry in the .debug_sfnames section right away.
5467 Doing so allows us to avoid tickling an assembler bug (present in some
5468 m68k assemblers) which yields assembly-time errors in cases where the
5469 difference of two label addresses is taken and where the two labels
5470 are in a section *other* than the one where the difference is being
5471 calculated, and where at least one of the two symbol references is a
5472 forward reference. (This bug could be tickled by our .debug_srcinfo
5473 entries if we don't output their corresponding .debug_sfnames entries
5477 lookup_filename (file_name)
5478 const char *file_name;
5480 register filename_entry *search_p;
5481 register filename_entry *limit_p = &filename_table[ft_entries];
5483 for (search_p = filename_table; search_p < limit_p; search_p++)
5484 if (!strcmp (file_name, search_p->name))
5486 /* When we get here, we have found the filename that we were
5487 looking for in the filename_table. Now we want to make sure
5488 that it gets moved to the zero'th entry in the table (if it
5489 is not already there) so that subsequent attempts to find the
5490 same filename will find it as quickly as possible. */
5492 shuffle_filename_entry (search_p);
5493 return filename_table[0].number;
5496 /* We come here whenever we have a new filename which is not registered
5497 in the current table. Here we add it to the table. */
5499 /* Prepare to add a new table entry by making sure there is enough space
5500 in the table to do so. If not, expand the current table. */
5502 if (ft_entries == ft_entries_allocated)
5504 ft_entries_allocated += FT_ENTRIES_INCREMENT;
5506 = (filename_entry *)
5507 xrealloc (filename_table,
5508 ft_entries_allocated * sizeof (filename_entry));
5511 /* Initially, add the new entry at the end of the filename table. */
5513 filename_table[ft_entries].number = ft_entries;
5514 filename_table[ft_entries].name = xstrdup (file_name);
5516 /* Shuffle the new entry into filename_table[0]. */
5518 shuffle_filename_entry (&filename_table[ft_entries]);
5520 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5521 generate_new_sfname_entry ();
5524 return filename_table[0].number;
5528 generate_srcinfo_entry (line_entry_num, files_entry_num)
5529 unsigned line_entry_num;
5530 unsigned files_entry_num;
5532 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5534 fputc ('\n', asm_out_file);
5535 ASM_OUTPUT_PUSH_SECTION (asm_out_file, SRCINFO_SECTION);
5536 sprintf (label, LINE_ENTRY_LABEL_FMT, line_entry_num);
5537 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, label, LINE_BEGIN_LABEL);
5538 sprintf (label, SFNAMES_ENTRY_LABEL_FMT, files_entry_num);
5539 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, label, SFNAMES_BEGIN_LABEL);
5540 ASM_OUTPUT_POP_SECTION (asm_out_file);
5544 dwarfout_line (filename, line)
5545 register const char *filename;
5546 register unsigned line;
5548 if (debug_info_level >= DINFO_LEVEL_NORMAL
5549 /* We can't emit line number info for functions in separate sections,
5550 because the assembler can't subtract labels in different sections. */
5551 && DECL_SECTION_NAME (current_function_decl) == NULL_TREE)
5553 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5554 static unsigned last_line_entry_num = 0;
5555 static unsigned prev_file_entry_num = (unsigned) -1;
5556 register unsigned this_file_entry_num;
5558 function_section (current_function_decl);
5559 sprintf (label, LINE_CODE_LABEL_FMT, ++last_line_entry_num);
5560 ASM_OUTPUT_LABEL (asm_out_file, label);
5562 fputc ('\n', asm_out_file);
5564 if (use_gnu_debug_info_extensions)
5565 this_file_entry_num = lookup_filename (filename);
5567 this_file_entry_num = (unsigned) -1;
5569 ASM_OUTPUT_PUSH_SECTION (asm_out_file, LINE_SECTION);
5570 if (this_file_entry_num != prev_file_entry_num)
5572 char line_entry_label[MAX_ARTIFICIAL_LABEL_BYTES];
5574 sprintf (line_entry_label, LINE_ENTRY_LABEL_FMT, last_line_entry_num);
5575 ASM_OUTPUT_LABEL (asm_out_file, line_entry_label);
5579 register const char *tail = rindex (filename, '/');
5585 fprintf (asm_out_file, "\t%s\t%u\t%s %s:%u\n",
5586 UNALIGNED_INT_ASM_OP, line, ASM_COMMENT_START,
5588 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0xffff);
5589 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, label, TEXT_BEGIN_LABEL);
5590 ASM_OUTPUT_POP_SECTION (asm_out_file);
5592 if (this_file_entry_num != prev_file_entry_num)
5593 generate_srcinfo_entry (last_line_entry_num, this_file_entry_num);
5594 prev_file_entry_num = this_file_entry_num;
5598 /* Generate an entry in the .debug_macinfo section. */
5601 generate_macinfo_entry (type_and_offset, string)
5602 register const char *type_and_offset;
5603 register const char *string;
5605 if (! use_gnu_debug_info_extensions)
5608 fputc ('\n', asm_out_file);
5609 ASM_OUTPUT_PUSH_SECTION (asm_out_file, MACINFO_SECTION);
5610 fprintf (asm_out_file, "\t%s\t%s\n", UNALIGNED_INT_ASM_OP, type_and_offset);
5611 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, string);
5612 ASM_OUTPUT_POP_SECTION (asm_out_file);
5616 dwarfout_start_new_source_file (filename)
5617 register const char *filename;
5619 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5620 char type_and_offset[MAX_ARTIFICIAL_LABEL_BYTES*3];
5622 sprintf (label, SFNAMES_ENTRY_LABEL_FMT, lookup_filename (filename));
5623 sprintf (type_and_offset, "0x%08x+%s-%s",
5624 ((unsigned) MACINFO_start << 24),
5625 /* Hack: skip leading '*' . */
5626 (*label == '*') + label,
5627 (*SFNAMES_BEGIN_LABEL == '*') + SFNAMES_BEGIN_LABEL);
5628 generate_macinfo_entry (type_and_offset, "");
5632 dwarfout_resume_previous_source_file (lineno)
5633 register unsigned lineno;
5635 char type_and_offset[MAX_ARTIFICIAL_LABEL_BYTES*2];
5637 sprintf (type_and_offset, "0x%08x+%u",
5638 ((unsigned) MACINFO_resume << 24), lineno);
5639 generate_macinfo_entry (type_and_offset, "");
5642 /* Called from check_newline in c-parse.y. The `buffer' parameter
5643 contains the tail part of the directive line, i.e. the part which
5644 is past the initial whitespace, #, whitespace, directive-name,
5648 dwarfout_define (lineno, buffer)
5649 register unsigned lineno;
5650 register const char *buffer;
5652 static int initialized = 0;
5653 char type_and_offset[MAX_ARTIFICIAL_LABEL_BYTES*2];
5657 dwarfout_start_new_source_file (primary_filename);
5660 sprintf (type_and_offset, "0x%08x+%u",
5661 ((unsigned) MACINFO_define << 24), lineno);
5662 generate_macinfo_entry (type_and_offset, buffer);
5665 /* Called from check_newline in c-parse.y. The `buffer' parameter
5666 contains the tail part of the directive line, i.e. the part which
5667 is past the initial whitespace, #, whitespace, directive-name,
5671 dwarfout_undef (lineno, buffer)
5672 register unsigned lineno;
5673 register const char *buffer;
5675 char type_and_offset[MAX_ARTIFICIAL_LABEL_BYTES*2];
5677 sprintf (type_and_offset, "0x%08x+%u",
5678 ((unsigned) MACINFO_undef << 24), lineno);
5679 generate_macinfo_entry (type_and_offset, buffer);
5682 /* Set up for Dwarf output at the start of compilation. */
5685 dwarfout_init (asm_out_file, main_input_filename)
5686 register FILE *asm_out_file;
5687 register const char *main_input_filename;
5689 /* Remember the name of the primary input file. */
5691 primary_filename = main_input_filename;
5693 /* Allocate the initial hunk of the pending_sibling_stack. */
5695 pending_sibling_stack
5697 xmalloc (PENDING_SIBLINGS_INCREMENT * sizeof (unsigned));
5698 pending_siblings_allocated = PENDING_SIBLINGS_INCREMENT;
5699 pending_siblings = 1;
5701 /* Allocate the initial hunk of the filename_table. */
5704 = (filename_entry *)
5705 xmalloc (FT_ENTRIES_INCREMENT * sizeof (filename_entry));
5706 ft_entries_allocated = FT_ENTRIES_INCREMENT;
5709 /* Allocate the initial hunk of the pending_types_list. */
5712 = (tree *) xmalloc (PENDING_TYPES_INCREMENT * sizeof (tree));
5713 pending_types_allocated = PENDING_TYPES_INCREMENT;
5716 /* Create an artificial RECORD_TYPE node which we can use in our hack
5717 to get the DIEs representing types of formal parameters to come out
5718 only *after* the DIEs for the formal parameters themselves. */
5720 fake_containing_scope = make_node (RECORD_TYPE);
5722 /* Output a starting label for the .text section. */
5724 fputc ('\n', asm_out_file);
5725 ASM_OUTPUT_PUSH_SECTION (asm_out_file, TEXT_SECTION);
5726 ASM_OUTPUT_LABEL (asm_out_file, TEXT_BEGIN_LABEL);
5727 ASM_OUTPUT_POP_SECTION (asm_out_file);
5729 /* Output a starting label for the .data section. */
5731 fputc ('\n', asm_out_file);
5732 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DATA_SECTION);
5733 ASM_OUTPUT_LABEL (asm_out_file, DATA_BEGIN_LABEL);
5734 ASM_OUTPUT_POP_SECTION (asm_out_file);
5736 #if 0 /* GNU C doesn't currently use .data1. */
5737 /* Output a starting label for the .data1 section. */
5739 fputc ('\n', asm_out_file);
5740 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DATA1_SECTION);
5741 ASM_OUTPUT_LABEL (asm_out_file, DATA1_BEGIN_LABEL);
5742 ASM_OUTPUT_POP_SECTION (asm_out_file);
5745 /* Output a starting label for the .rodata section. */
5747 fputc ('\n', asm_out_file);
5748 ASM_OUTPUT_PUSH_SECTION (asm_out_file, RODATA_SECTION);
5749 ASM_OUTPUT_LABEL (asm_out_file, RODATA_BEGIN_LABEL);
5750 ASM_OUTPUT_POP_SECTION (asm_out_file);
5752 #if 0 /* GNU C doesn't currently use .rodata1. */
5753 /* Output a starting label for the .rodata1 section. */
5755 fputc ('\n', asm_out_file);
5756 ASM_OUTPUT_PUSH_SECTION (asm_out_file, RODATA1_SECTION);
5757 ASM_OUTPUT_LABEL (asm_out_file, RODATA1_BEGIN_LABEL);
5758 ASM_OUTPUT_POP_SECTION (asm_out_file);
5761 /* Output a starting label for the .bss section. */
5763 fputc ('\n', asm_out_file);
5764 ASM_OUTPUT_PUSH_SECTION (asm_out_file, BSS_SECTION);
5765 ASM_OUTPUT_LABEL (asm_out_file, BSS_BEGIN_LABEL);
5766 ASM_OUTPUT_POP_SECTION (asm_out_file);
5768 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5770 if (use_gnu_debug_info_extensions)
5772 /* Output a starting label and an initial (compilation directory)
5773 entry for the .debug_sfnames section. The starting label will be
5774 referenced by the initial entry in the .debug_srcinfo section. */
5776 fputc ('\n', asm_out_file);
5777 ASM_OUTPUT_PUSH_SECTION (asm_out_file, SFNAMES_SECTION);
5778 ASM_OUTPUT_LABEL (asm_out_file, SFNAMES_BEGIN_LABEL);
5780 register const char *pwd = getpwd ();
5781 register char *dirname;
5784 pfatal_with_name ("getpwd");
5785 dirname = concat (pwd, "/", NULL);
5786 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, dirname);
5789 ASM_OUTPUT_POP_SECTION (asm_out_file);
5792 if (debug_info_level >= DINFO_LEVEL_VERBOSE
5793 && use_gnu_debug_info_extensions)
5795 /* Output a starting label for the .debug_macinfo section. This
5796 label will be referenced by the AT_mac_info attribute in the
5797 TAG_compile_unit DIE. */
5799 fputc ('\n', asm_out_file);
5800 ASM_OUTPUT_PUSH_SECTION (asm_out_file, MACINFO_SECTION);
5801 ASM_OUTPUT_LABEL (asm_out_file, MACINFO_BEGIN_LABEL);
5802 ASM_OUTPUT_POP_SECTION (asm_out_file);
5805 /* Generate the initial entry for the .line section. */
5807 fputc ('\n', asm_out_file);
5808 ASM_OUTPUT_PUSH_SECTION (asm_out_file, LINE_SECTION);
5809 ASM_OUTPUT_LABEL (asm_out_file, LINE_BEGIN_LABEL);
5810 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, LINE_END_LABEL, LINE_BEGIN_LABEL);
5811 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_BEGIN_LABEL);
5812 ASM_OUTPUT_POP_SECTION (asm_out_file);
5814 if (use_gnu_debug_info_extensions)
5816 /* Generate the initial entry for the .debug_srcinfo section. */
5818 fputc ('\n', asm_out_file);
5819 ASM_OUTPUT_PUSH_SECTION (asm_out_file, SRCINFO_SECTION);
5820 ASM_OUTPUT_LABEL (asm_out_file, SRCINFO_BEGIN_LABEL);
5821 ASM_OUTPUT_DWARF_ADDR (asm_out_file, LINE_BEGIN_LABEL);
5822 ASM_OUTPUT_DWARF_ADDR (asm_out_file, SFNAMES_BEGIN_LABEL);
5823 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_BEGIN_LABEL);
5824 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_END_LABEL);
5825 #ifdef DWARF_TIMESTAMPS
5826 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, time (NULL));
5828 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, -1);
5830 ASM_OUTPUT_POP_SECTION (asm_out_file);
5833 /* Generate the initial entry for the .debug_pubnames section. */
5835 fputc ('\n', asm_out_file);
5836 ASM_OUTPUT_PUSH_SECTION (asm_out_file, PUBNAMES_SECTION);
5837 ASM_OUTPUT_DWARF_ADDR (asm_out_file, DEBUG_BEGIN_LABEL);
5838 ASM_OUTPUT_POP_SECTION (asm_out_file);
5840 /* Generate the initial entry for the .debug_aranges section. */
5842 fputc ('\n', asm_out_file);
5843 ASM_OUTPUT_PUSH_SECTION (asm_out_file, ARANGES_SECTION);
5844 ASM_OUTPUT_DWARF_ADDR (asm_out_file, DEBUG_BEGIN_LABEL);
5845 ASM_OUTPUT_POP_SECTION (asm_out_file);
5848 /* Setup first DIE number == 1. */
5849 NEXT_DIE_NUM = next_unused_dienum++;
5851 /* Generate the initial DIE for the .debug section. Note that the
5852 (string) value given in the AT_name attribute of the TAG_compile_unit
5853 DIE will (typically) be a relative pathname and that this pathname
5854 should be taken as being relative to the directory from which the
5855 compiler was invoked when the given (base) source file was compiled. */
5857 fputc ('\n', asm_out_file);
5858 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DEBUG_SECTION);
5859 ASM_OUTPUT_LABEL (asm_out_file, DEBUG_BEGIN_LABEL);
5860 output_die (output_compile_unit_die, main_input_filename);
5861 ASM_OUTPUT_POP_SECTION (asm_out_file);
5863 fputc ('\n', asm_out_file);
5866 /* Output stuff that dwarf requires at the end of every file. */
5871 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5873 fputc ('\n', asm_out_file);
5874 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DEBUG_SECTION);
5875 retry_incomplete_types ();
5876 fputc ('\n', asm_out_file);
5878 /* Mark the end of the chain of siblings which represent all file-scope
5879 declarations in this compilation unit. */
5881 /* The (null) DIE which represents the terminator for the (sibling linked)
5882 list of file-scope items is *special*. Normally, we would just call
5883 end_sibling_chain at this point in order to output a word with the
5884 value `4' and that word would act as the terminator for the list of
5885 DIEs describing file-scope items. Unfortunately, if we were to simply
5886 do that, the label that would follow this DIE in the .debug section
5887 (i.e. `..D2') would *not* be properly aligned (as it must be on some
5888 machines) to a 4 byte boundary.
5890 In order to force the label `..D2' to get aligned to a 4 byte boundary,
5891 the trick used is to insert extra (otherwise useless) padding bytes
5892 into the (null) DIE that we know must precede the ..D2 label in the
5893 .debug section. The amount of padding required can be anywhere between
5894 0 and 3 bytes. The length word at the start of this DIE (i.e. the one
5895 with the padding) would normally contain the value 4, but now it will
5896 also have to include the padding bytes, so it will instead have some
5897 value in the range 4..7.
5899 Fortunately, the rules of Dwarf say that any DIE whose length word
5900 contains *any* value less than 8 should be treated as a null DIE, so
5901 this trick works out nicely. Clever, eh? Don't give me any credit
5902 (or blame). I didn't think of this scheme. I just conformed to it.
5905 output_die (output_padded_null_die, (void *) 0);
5908 sprintf (label, DIE_BEGIN_LABEL_FMT, NEXT_DIE_NUM);
5909 ASM_OUTPUT_LABEL (asm_out_file, label); /* should be ..D2 */
5910 ASM_OUTPUT_POP_SECTION (asm_out_file);
5912 /* Output a terminator label for the .text section. */
5914 fputc ('\n', asm_out_file);
5915 ASM_OUTPUT_PUSH_SECTION (asm_out_file, TEXT_SECTION);
5916 ASM_OUTPUT_LABEL (asm_out_file, TEXT_END_LABEL);
5917 ASM_OUTPUT_POP_SECTION (asm_out_file);
5919 /* Output a terminator label for the .data section. */
5921 fputc ('\n', asm_out_file);
5922 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DATA_SECTION);
5923 ASM_OUTPUT_LABEL (asm_out_file, DATA_END_LABEL);
5924 ASM_OUTPUT_POP_SECTION (asm_out_file);
5926 #if 0 /* GNU C doesn't currently use .data1. */
5927 /* Output a terminator label for the .data1 section. */
5929 fputc ('\n', asm_out_file);
5930 ASM_OUTPUT_PUSH_SECTION (asm_out_file, DATA1_SECTION);
5931 ASM_OUTPUT_LABEL (asm_out_file, DATA1_END_LABEL);
5932 ASM_OUTPUT_POP_SECTION (asm_out_file);
5935 /* Output a terminator label for the .rodata section. */
5937 fputc ('\n', asm_out_file);
5938 ASM_OUTPUT_PUSH_SECTION (asm_out_file, RODATA_SECTION);
5939 ASM_OUTPUT_LABEL (asm_out_file, RODATA_END_LABEL);
5940 ASM_OUTPUT_POP_SECTION (asm_out_file);
5942 #if 0 /* GNU C doesn't currently use .rodata1. */
5943 /* Output a terminator label for the .rodata1 section. */
5945 fputc ('\n', asm_out_file);
5946 ASM_OUTPUT_PUSH_SECTION (asm_out_file, RODATA1_SECTION);
5947 ASM_OUTPUT_LABEL (asm_out_file, RODATA1_END_LABEL);
5948 ASM_OUTPUT_POP_SECTION (asm_out_file);
5951 /* Output a terminator label for the .bss section. */
5953 fputc ('\n', asm_out_file);
5954 ASM_OUTPUT_PUSH_SECTION (asm_out_file, BSS_SECTION);
5955 ASM_OUTPUT_LABEL (asm_out_file, BSS_END_LABEL);
5956 ASM_OUTPUT_POP_SECTION (asm_out_file);
5958 if (debug_info_level >= DINFO_LEVEL_NORMAL)
5960 /* Output a terminating entry for the .line section. */
5962 fputc ('\n', asm_out_file);
5963 ASM_OUTPUT_PUSH_SECTION (asm_out_file, LINE_SECTION);
5964 ASM_OUTPUT_LABEL (asm_out_file, LINE_LAST_ENTRY_LABEL);
5965 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
5966 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0xffff);
5967 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, TEXT_END_LABEL, TEXT_BEGIN_LABEL);
5968 ASM_OUTPUT_LABEL (asm_out_file, LINE_END_LABEL);
5969 ASM_OUTPUT_POP_SECTION (asm_out_file);
5971 if (use_gnu_debug_info_extensions)
5973 /* Output a terminating entry for the .debug_srcinfo section. */
5975 fputc ('\n', asm_out_file);
5976 ASM_OUTPUT_PUSH_SECTION (asm_out_file, SRCINFO_SECTION);
5977 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
5978 LINE_LAST_ENTRY_LABEL, LINE_BEGIN_LABEL);
5979 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, -1);
5980 ASM_OUTPUT_POP_SECTION (asm_out_file);
5983 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
5985 /* Output terminating entries for the .debug_macinfo section. */
5987 dwarfout_resume_previous_source_file (0);
5989 fputc ('\n', asm_out_file);
5990 ASM_OUTPUT_PUSH_SECTION (asm_out_file, MACINFO_SECTION);
5991 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
5992 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
5993 ASM_OUTPUT_POP_SECTION (asm_out_file);
5996 /* Generate the terminating entry for the .debug_pubnames section. */
5998 fputc ('\n', asm_out_file);
5999 ASM_OUTPUT_PUSH_SECTION (asm_out_file, PUBNAMES_SECTION);
6000 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
6001 ASM_OUTPUT_DWARF_STRING_NEWLINE (asm_out_file, "");
6002 ASM_OUTPUT_POP_SECTION (asm_out_file);
6004 /* Generate the terminating entries for the .debug_aranges section.
6006 Note that we want to do this only *after* we have output the end
6007 labels (for the various program sections) which we are going to
6008 refer to here. This allows us to work around a bug in the m68k
6009 svr4 assembler. That assembler gives bogus assembly-time errors
6010 if (within any given section) you try to take the difference of
6011 two relocatable symbols, both of which are located within some
6012 other section, and if one (or both?) of the symbols involved is
6013 being forward-referenced. By generating the .debug_aranges
6014 entries at this late point in the assembly output, we skirt the
6015 issue simply by avoiding forward-references.
6018 fputc ('\n', asm_out_file);
6019 ASM_OUTPUT_PUSH_SECTION (asm_out_file, ARANGES_SECTION);
6021 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_BEGIN_LABEL);
6022 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, TEXT_END_LABEL, TEXT_BEGIN_LABEL);
6024 ASM_OUTPUT_DWARF_ADDR (asm_out_file, DATA_BEGIN_LABEL);
6025 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, DATA_END_LABEL, DATA_BEGIN_LABEL);
6027 #if 0 /* GNU C doesn't currently use .data1. */
6028 ASM_OUTPUT_DWARF_ADDR (asm_out_file, DATA1_BEGIN_LABEL);
6029 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, DATA1_END_LABEL,
6033 ASM_OUTPUT_DWARF_ADDR (asm_out_file, RODATA_BEGIN_LABEL);
6034 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, RODATA_END_LABEL,
6035 RODATA_BEGIN_LABEL);
6037 #if 0 /* GNU C doesn't currently use .rodata1. */
6038 ASM_OUTPUT_DWARF_ADDR (asm_out_file, RODATA1_BEGIN_LABEL);
6039 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, RODATA1_END_LABEL,
6040 RODATA1_BEGIN_LABEL);
6043 ASM_OUTPUT_DWARF_ADDR (asm_out_file, BSS_BEGIN_LABEL);
6044 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, BSS_END_LABEL, BSS_BEGIN_LABEL);
6046 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
6047 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
6049 ASM_OUTPUT_POP_SECTION (asm_out_file);
6052 /* There should not be any pending types left at the end. We need
6053 this now because it may not have been checked on the last call to
6054 dwarfout_file_scope_decl. */
6055 if (pending_types != 0)
6059 #endif /* DWARF_DEBUGGING_INFO */
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