1 /* Output sdb-format symbol table information from GNU compiler.
2 Copyright (C) 1988, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* mike@tredysvr.Tredydev.Unisys.COM says:
21 I modified the struct.c example and have a nm of a .o resulting from the
22 AT&T C compiler. From the example below I would conclude the following:
24 1. All .defs from structures are emitted as scanned. The example below
25 clearly shows the symbol table entries for BoxRec2 are after the first
28 2. All functions and their locals (including statics) are emitted as scanned.
30 3. All nested unnamed union and structure .defs must be emitted before
31 the structure in which they are nested. The AT&T assembler is a
32 one pass beast as far as symbolics are concerned.
34 4. All structure .defs are emitted before the typedefs that refer to them.
36 5. All top level static and external variable definitions are moved to the
37 end of file with all top level statics occurring first before externs.
39 6. All undefined references are at the end of the file.
44 #ifdef SDB_DEBUGGING_INFO
51 #include "insn-config.h"
54 /* Mips systems use the SDB functions to dump out symbols, but
55 do not supply usable syms.h include files. */
56 #if defined(USG) && !defined(MIPS)
58 /* Use T_INT if we don't have T_VOID. */
62 #else /* not USG, or MIPS */
64 #endif /* not USG, or MIPS */
66 /* #include <storclass.h> used to be this instead of syms.h. */
68 /* 1 if PARM is passed to this function in memory. */
70 #define PARM_PASSED_IN_MEMORY(PARM) \
71 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
73 /* A C expression for the integer offset value of an automatic variable
74 (C_AUTO) having address X (an RTX). */
75 #ifndef DEBUGGER_AUTO_OFFSET
76 #define DEBUGGER_AUTO_OFFSET(X) \
77 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
80 /* A C expression for the integer offset value of an argument (C_ARG)
81 having address X (an RTX). The nominal offset is OFFSET. */
82 #ifndef DEBUGGER_ARG_OFFSET
83 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
86 /* Line number of beginning of current function, minus one.
87 Negative means not in a function or not using sdb. */
89 int sdb_begin_function_line = -1;
91 /* Counter to generate unique "names" for nameless struct members. */
93 static int unnamed_struct_number = 0;
95 extern FILE *asm_out_file;
97 extern tree current_function_decl;
100 void sdbout_symbol ();
103 static void sdbout_typedefs ();
104 static void sdbout_syms ();
105 static void sdbout_one_type ();
106 static void sdbout_queue_anonymous_type ();
107 static void sdbout_dequeue_anonymous_types ();
108 static int plain_type_1 ();
110 /* Define the default sizes for various types. */
112 #ifndef CHAR_TYPE_SIZE
113 #define CHAR_TYPE_SIZE BITS_PER_UNIT
116 #ifndef SHORT_TYPE_SIZE
117 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
120 #ifndef INT_TYPE_SIZE
121 #define INT_TYPE_SIZE BITS_PER_WORD
124 #ifndef LONG_TYPE_SIZE
125 #define LONG_TYPE_SIZE BITS_PER_WORD
128 #ifndef LONG_LONG_TYPE_SIZE
129 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
132 #ifndef FLOAT_TYPE_SIZE
133 #define FLOAT_TYPE_SIZE BITS_PER_WORD
136 #ifndef DOUBLE_TYPE_SIZE
137 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
140 #ifndef LONG_DOUBLE_TYPE_SIZE
141 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
144 /* Random macros describing parts of SDB data. */
146 /* Put something here if lines get too long */
149 /* Default value of delimiter is ";". */
151 #define SDB_DELIM ";"
154 /* Maximum number of dimensions the assembler will allow. */
156 #define SDB_MAX_DIM 4
160 #define PUT_SDB_SCL(a) fprintf(asm_out_file, "\t.scl\t%d%s", (a), SDB_DELIM)
163 #ifndef PUT_SDB_INT_VAL
164 #define PUT_SDB_INT_VAL(a) fprintf (asm_out_file, "\t.val\t%d%s", (a), SDB_DELIM)
168 #define PUT_SDB_VAL(a) \
169 ( fputs ("\t.val\t", asm_out_file), \
170 output_addr_const (asm_out_file, (a)), \
171 fprintf (asm_out_file, SDB_DELIM))
175 #define PUT_SDB_DEF(a) \
176 do { fprintf (asm_out_file, "\t.def\t"); \
177 ASM_OUTPUT_LABELREF (asm_out_file, a); \
178 fprintf (asm_out_file, SDB_DELIM); } while (0)
181 #ifndef PUT_SDB_PLAIN_DEF
182 #define PUT_SDB_PLAIN_DEF(a) fprintf(asm_out_file,"\t.def\t.%s%s",a, SDB_DELIM)
185 #ifndef PUT_SDB_ENDEF
186 #define PUT_SDB_ENDEF fputs("\t.endef\n", asm_out_file)
190 #define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\t.type\t0%o%s", a, SDB_DELIM)
194 #define PUT_SDB_SIZE(a) fprintf(asm_out_file, "\t.size\t%d%s", a, SDB_DELIM)
197 #ifndef PUT_SDB_START_DIM
198 #define PUT_SDB_START_DIM fprintf(asm_out_file, "\t.dim\t")
201 #ifndef PUT_SDB_NEXT_DIM
202 #define PUT_SDB_NEXT_DIM(a) fprintf(asm_out_file, "%d,", a)
205 #ifndef PUT_SDB_LAST_DIM
206 #define PUT_SDB_LAST_DIM(a) fprintf(asm_out_file, "%d%s", a, SDB_DELIM)
210 #define PUT_SDB_TAG(a) \
211 do { fprintf (asm_out_file, "\t.tag\t"); \
212 ASM_OUTPUT_LABELREF (asm_out_file, a); \
213 fprintf (asm_out_file, SDB_DELIM); } while (0)
216 #ifndef PUT_SDB_BLOCK_START
217 #define PUT_SDB_BLOCK_START(LINE) \
218 fprintf (asm_out_file, \
219 "\t.def\t.bb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
220 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
223 #ifndef PUT_SDB_BLOCK_END
224 #define PUT_SDB_BLOCK_END(LINE) \
225 fprintf (asm_out_file, \
226 "\t.def\t.eb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
227 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
230 #ifndef PUT_SDB_FUNCTION_START
231 #define PUT_SDB_FUNCTION_START(LINE) \
232 fprintf (asm_out_file, \
233 "\t.def\t.bf%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
234 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
237 #ifndef PUT_SDB_FUNCTION_END
238 #define PUT_SDB_FUNCTION_END(LINE) \
239 fprintf (asm_out_file, \
240 "\t.def\t.ef%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
241 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
244 #ifndef PUT_SDB_EPILOGUE_END
245 #define PUT_SDB_EPILOGUE_END(NAME) \
246 do { fprintf (asm_out_file, "\t.def\t"); \
247 ASM_OUTPUT_LABELREF (asm_out_file, NAME); \
248 fprintf (asm_out_file, \
249 "%s\t.val\t.%s\t.scl\t-1%s\t.endef\n", \
250 SDB_DELIM, SDB_DELIM, SDB_DELIM); } while (0)
253 #ifndef SDB_GENERATE_FAKE
254 #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
255 sprintf ((BUFFER), ".%dfake", (NUMBER));
258 /* Return the sdb tag identifier string for TYPE
259 if TYPE has already been defined; otherwise return a null pointer. */
261 #define KNOWN_TYPE_TAG(type) (char *)(TYPE_SYMTAB_ADDRESS (type))
263 /* Set the sdb tag identifier string for TYPE to NAME. */
265 #define SET_KNOWN_TYPE_TAG(TYPE, NAME) \
266 (TYPE_SYMTAB_ADDRESS (TYPE) = (int)(NAME))
268 /* Return the name (a string) of the struct, union or enum tag
269 described by the TREE_LIST node LINK. This is 0 for an anonymous one. */
271 #define TAG_NAME(link) \
272 (((link) && TREE_PURPOSE ((link)) \
273 && IDENTIFIER_POINTER (TREE_PURPOSE ((link)))) \
274 ? IDENTIFIER_POINTER (TREE_PURPOSE ((link))) : (char *) 0)
276 /* Ensure we don't output a negative line number. */
277 #define MAKE_LINE_SAFE(line) \
278 if (line <= sdb_begin_function_line) line = sdb_begin_function_line + 1
280 /* Set up for SDB output at the start of compilation. */
283 sdbout_init (asm_file, input_file_name, syms)
285 char *input_file_name;
288 #if 0 /* Nothing need be output for the predefined types. */
289 /* Get all permanent types that have typedef names,
290 and output them all, except for those already output. */
292 sdbout_typedefs (syms);
298 /* return the tag identifier for type
302 tag_of_ru_type (type,link)
305 if (TYPE_SYMTAB_ADDRESS (type))
306 return (char *)TYPE_SYMTAB_ADDRESS (type);
307 if (link && TREE_PURPOSE (link)
308 && IDENTIFIER_POINTER (TREE_PURPOSE (link)))
309 TYPE_SYMTAB_ADDRESS (type)
310 = (int)IDENTIFIER_POINTER (TREE_PURPOSE (link));
312 return (char *) TYPE_SYMTAB_ADDRESS (type);
316 /* Return a unique string to name an anonymous type. */
323 SDB_GENERATE_FAKE (label, unnamed_struct_number);
324 unnamed_struct_number++;
325 labelstr = (char *) permalloc (strlen (label) + 1);
326 strcpy (labelstr, label);
330 /* Return the number which describes TYPE for SDB.
331 For pointers, etc., this function is recursive.
332 Each record, union or enumeral type must already have had a
333 tag number output. */
335 /* The number is given by d6d5d4d3d2d1bbbb
336 where bbbb is 4 bit basic type, and di indicate one of notype,ptr,fn,array.
337 Thus, char *foo () has bbbb=T_CHAR
340 N_BTMASK= 017 1111 basic type field.
341 N_TSHIFT= 2 derived type shift
342 N_BTSHFT= 4 Basic type shift */
344 /* Produce the number that describes a pointer, function or array type.
345 PREV is the number describing the target, value or element type.
346 DT_type describes how to transform that type. */
347 #define PUSH_DERIVED_LEVEL(DT_type,PREV) \
348 ((((PREV)&~N_BTMASK)<<N_TSHIFT)|(DT_type<<N_BTSHFT)|(PREV&N_BTMASK))
350 /* Number of elements used in sdb_dims. */
351 static int sdb_n_dims = 0;
353 /* Table of array dimensions of current type. */
354 static int sdb_dims[SDB_MAX_DIM];
356 /* Size of outermost array currently being processed. */
357 static int sdb_type_size = -1;
363 int val = plain_type_1 (type);
365 /* If we have already saved up some array dimensions, print them now. */
370 for (i = sdb_n_dims - 1; i > 0; i--)
371 PUT_SDB_NEXT_DIM (sdb_dims[i]);
372 PUT_SDB_LAST_DIM (sdb_dims[0]);
375 sdb_type_size = int_size_in_bytes (type);
376 /* Don't kill sdb if type is not laid out or has variable size. */
377 if (sdb_type_size < 0)
380 /* If we have computed the size of an array containing this type,
382 if (sdb_type_size >= 0)
384 PUT_SDB_SIZE (sdb_type_size);
391 sdbout_record_type_name (type)
397 if (KNOWN_TYPE_TAG (type))
400 if (TYPE_NAME (type) != 0)
403 /* Find the IDENTIFIER_NODE for the type name. */
404 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
406 t = TYPE_NAME (type);
408 #if 1 /* As a temprary hack, use typedef names for C++ only. */
409 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
410 && TYPE_LANG_SPECIFIC (type))
412 t = DECL_NAME (TYPE_NAME (type));
416 /* Now get the name as a string, or invent one. */
418 name = IDENTIFIER_POINTER (t);
421 no_name = (name == 0 || *name == 0);
423 name = gen_fake_label ();
425 SET_KNOWN_TYPE_TAG (type, name);
426 #ifdef SDB_ALLOW_FORWARD_REFERENCES
428 sdbout_queue_anonymous_type (type);
437 type = void_type_node;
438 if (type == error_mark_node)
439 type = integer_type_node;
440 type = TYPE_MAIN_VARIANT (type);
442 switch (TREE_CODE (type))
448 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
449 if (size == CHAR_TYPE_SIZE)
450 return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
451 if (size == SHORT_TYPE_SIZE)
452 return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
453 if (size == INT_TYPE_SIZE)
454 return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
460 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
461 if (size == FLOAT_TYPE_SIZE)
463 if (size == DOUBLE_TYPE_SIZE)
471 m = plain_type_1 (TREE_TYPE (type));
472 if (sdb_n_dims < SDB_MAX_DIM)
473 sdb_dims[sdb_n_dims++]
474 = (TYPE_DOMAIN (type)
475 ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1
477 return PUSH_DERIVED_LEVEL (DT_ARY, m);
485 #ifdef SDB_ALLOW_FORWARD_REFERENCES
486 sdbout_record_type_name (type);
488 #ifndef SDB_ALLOW_UNKNOWN_REFERENCES
489 if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
490 #ifdef SDB_ALLOW_FORWARD_REFERENCES
491 || TYPE_MODE (type) != VOIDmode
496 /* Output the referenced structure tag name
497 only if the .def has already been finished.
498 At least on 386, the Unix assembler
499 cannot handle forward references to tags. */
500 /* But the 88100, it requires them, sigh... */
501 /* And the MIPS requires unknown refs as well... */
502 tag = KNOWN_TYPE_TAG (type);
504 /* These 3 lines used to follow the close brace.
505 However, a size of 0 without a tag implies a tag of 0,
506 so if we don't know a tag, we can't mention the size. */
507 sdb_type_size = int_size_in_bytes (type);
508 if (sdb_type_size < 0)
511 return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
512 : (TREE_CODE (type) == UNION_TYPE) ? T_UNION
518 int m = plain_type_1 (TREE_TYPE (type));
519 return PUSH_DERIVED_LEVEL (DT_PTR, m);
524 int m = plain_type_1 (TREE_TYPE (type));
525 return PUSH_DERIVED_LEVEL (DT_FCN, m);
532 /* Output the symbols defined in block number DO_BLOCK.
533 Set NEXT_BLOCK_NUMBER to 0 before calling.
535 This function works by walking the tree structure of blocks,
536 counting blocks until it finds the desired block. */
538 static int do_block = 0;
540 static int next_block_number;
548 /* Ignore blocks never expanded or otherwise marked as real. */
549 if (TREE_USED (block))
551 /* When we reach the specified block, output its symbols. */
552 if (next_block_number == do_block)
554 sdbout_syms (BLOCK_VARS (block));
557 /* If we are past the specified block, stop the scan. */
558 if (next_block_number > do_block)
563 /* Scan the blocks within this block. */
564 sdbout_block (BLOCK_SUBBLOCKS (block));
567 block = BLOCK_CHAIN (block);
571 /* Call sdbout_symbol on each decl in the chain SYMS. */
579 if (TREE_CODE (syms) != LABEL_DECL)
580 sdbout_symbol (syms, 1);
581 syms = TREE_CHAIN (syms);
585 /* Output SDB information for a symbol described by DECL.
586 LOCAL is nonzero if the symbol is not file-scope. */
589 sdbout_symbol (decl, local)
594 tree type = TREE_TYPE (decl);
595 tree context = NULL_TREE;
600 sdbout_one_type (type);
602 #if 0 /* This loses when functions are marked to be ignored,
603 which happens in the C++ front end. */
604 if (DECL_IGNORED_P (decl))
608 switch (TREE_CODE (decl))
611 /* Enum values are defined by defining the enum type. */
615 /* Don't mention a nested function under its parent. */
616 context = decl_function_context (decl);
617 if (context == current_function_decl)
619 if (TREE_EXTERNAL (decl))
621 if (GET_CODE (DECL_RTL (decl)) != MEM
622 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
624 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
625 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
626 PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
630 /* Done with tagged types. */
631 if (DECL_NAME (decl) == 0)
633 if (DECL_IGNORED_P (decl))
636 /* Output typedef name. */
637 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
638 PUT_SDB_SCL (C_TPDEF);
642 /* Parm decls go in their own separate chains
643 and are output by sdbout_reg_parms and sdbout_parms. */
647 /* Don't mention a variable that is external.
648 Let the file that defines it describe it. */
649 if (TREE_EXTERNAL (decl))
652 /* Ignore __FUNCTION__, etc. */
653 if (DECL_IGNORED_P (decl))
656 /* If there was an error in the declaration, don't dump core
657 if there is no RTL associated with the variable doesn't
659 if (DECL_RTL (decl) == 0)
662 value = eliminate_regs (DECL_RTL (decl), 0, 0);
664 /* Don't mention a variable at all
665 if it was completely optimized into nothingness.
667 If DECL was from an inline function, then its rtl
668 is not identically the rtl that was used in this
669 particular compilation. */
670 if (GET_CODE (value) == REG)
672 regno = REGNO (DECL_RTL (decl));
673 if (regno >= FIRST_PSEUDO_REGISTER)
674 regno = reg_renumber[REGNO (DECL_RTL (decl))];
678 else if (GET_CODE (DECL_RTL (decl)) == SUBREG)
681 while (GET_CODE (value) == SUBREG)
683 offset += SUBREG_WORD (value);
684 value = SUBREG_REG (value);
686 if (GET_CODE (value) == REG)
688 regno = REGNO (value);
689 if (regno >= FIRST_PSEUDO_REGISTER)
690 regno = reg_renumber[REGNO (value)];
696 /* Emit any structure, union, or enum type that has not been output.
697 This occurs for tag-less structs (et al) used to declare variables
699 if (TREE_CODE (type) == ENUMERAL_TYPE
700 || TREE_CODE (type) == RECORD_TYPE
701 || TREE_CODE (type) == UNION_TYPE)
703 if (TYPE_SIZE (type) != 0 /* not a forward reference */
704 && KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
705 sdbout_one_type (type);
708 /* Defer SDB information for top-level initialized variables! */
710 && GET_CODE (value) == MEM
711 && DECL_INITIAL (decl))
714 /* Record the name for, starting a symtab entry. */
715 name = IDENTIFIER_POINTER (DECL_NAME (decl));
717 if (GET_CODE (value) == MEM
718 && GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
721 if (TREE_PUBLIC (decl))
723 PUT_SDB_VAL (XEXP (value, 0));
728 PUT_SDB_VAL (XEXP (value, 0));
729 PUT_SDB_SCL (C_STAT);
735 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
738 else if (GET_CODE (value) == MEM
739 && (GET_CODE (XEXP (value, 0)) == MEM
740 || (GET_CODE (XEXP (value, 0)) == REG
741 && REGNO (XEXP (value, 0)) != FRAME_POINTER_REGNUM
742 && REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
743 /* If the value is indirect by memory or by a register
744 that isn't the frame pointer
745 then it means the object is variable-sized and address through
746 that register or stack slot. COFF has no way to represent this
747 so all we can do is output the variable as a pointer. */
750 if (GET_CODE (XEXP (value, 0)) == REG)
752 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
757 /* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
759 We want the value of that CONST_INT. */
760 /* Encore compiler hates a newline in a macro arg, it seems. */
761 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
762 (XEXP (XEXP (value, 0), 0)));
763 PUT_SDB_SCL (C_AUTO);
766 type = build_pointer_type (TREE_TYPE (decl));
768 else if (GET_CODE (value) == MEM
769 && GET_CODE (XEXP (value, 0)) == PLUS
770 && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
771 && GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
773 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))).
774 We want the value of that CONST_INT. */
776 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
777 PUT_SDB_SCL (C_AUTO);
779 else if (GET_CODE (value) == MEM && GET_CODE (XEXP (value, 0)) == CONST)
781 /* Handle an obscure case which can arise when optimizing and
782 when there are few available registers. (This is *always*
783 the case for i386/i486 targets). The DECL_RTL looks like
784 (MEM (CONST ...)) even though this variable is a local `auto'
785 or a local `register' variable. In effect, what has happened
786 is that the reload pass has seen that all assignments and
787 references for one such a local variable can be replaced by
788 equivalent assignments and references to some static storage
789 variable, thereby avoiding the need for a register. In such
790 cases we're forced to lie to debuggers and tell them that
791 this variable was itself `static'. */
793 PUT_SDB_VAL (XEXP (XEXP (value, 0), 0));
794 PUT_SDB_SCL (C_STAT);
798 /* It is something we don't know how to represent for SDB. */
803 PUT_SDB_TYPE (plain_type (type));
807 /* Output SDB information for a top-level initialized variable
808 that has been delayed. */
811 sdbout_toplevel_data (decl)
814 tree type = TREE_TYPE (decl);
816 if (DECL_IGNORED_P (decl))
819 if (! (TREE_CODE (decl) == VAR_DECL
820 && GET_CODE (DECL_RTL (decl)) == MEM
821 && DECL_INITIAL (decl)))
824 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
825 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
826 if (TREE_PUBLIC (decl))
832 PUT_SDB_SCL (C_STAT);
834 PUT_SDB_TYPE (plain_type (type));
838 #ifdef SDB_ALLOW_FORWARD_REFERENCES
840 /* Machinery to record and output anonymous types. */
842 static tree anonymous_types;
845 sdbout_queue_anonymous_type (type)
848 anonymous_types = saveable_tree_cons (NULL_TREE, type, anonymous_types);
852 sdbout_dequeue_anonymous_types ()
854 register tree types, link;
856 while (anonymous_types)
858 types = nreverse (anonymous_types);
859 anonymous_types = NULL_TREE;
861 for (link = types; link; link = TREE_CHAIN (link))
863 register tree type = TREE_VALUE (link);
865 if (type && ! TREE_ASM_WRITTEN (type))
866 sdbout_one_type (type);
873 /* Given a chain of ..._TYPE nodes, all of which have names,
874 output definitions of those names, as typedefs. */
882 for (link = types; link; link = TREE_CHAIN (link))
883 sdbout_one_type (link);
885 #ifdef SDB_ALLOW_FORWARD_REFERENCES
886 sdbout_dequeue_anonymous_types ();
895 if (type == error_mark_node)
896 type = integer_type_node;
897 PUT_SDB_TYPE (plain_type (type));
900 /* Output types of the fields of type TYPE, if they are structs.
902 Formerly did not chase through pointer types, since that could be circular.
903 They must come before TYPE, since forward refs are not allowed.
904 Now james@bigtex.cactus.org says to try them. */
907 sdbout_field_types (type)
911 for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
912 if (TREE_CODE (TREE_TYPE (tail)) == POINTER_TYPE)
913 sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
915 sdbout_one_type (TREE_TYPE (tail));
918 /* Use this to put out the top level defined record and union types
919 for later reference. If this is a struct with a name, then put that
920 name out. Other unnamed structs will have .xxfake labels generated so
921 that they may be referred to later.
922 The label will be stored in the KNOWN_TYPE_TAG slot of a type.
923 It may NOT be called recursively. */
926 sdbout_one_type (type)
931 switch (TREE_CODE (type))
936 type = TYPE_MAIN_VARIANT (type);
937 /* Don't output a type twice. */
938 if (TREE_ASM_WRITTEN (type))
939 /* James said test TREE_ASM_BEING_WRITTEN here. */
942 /* Output nothing if type is not yet defined. */
943 if (TYPE_SIZE (type) == 0)
946 TREE_ASM_WRITTEN (type) = 1;
948 /* This is reputed to cause trouble with the following case,
949 but perhaps checking TYPE_SIZE above will fix it.
951 /* Here is a test case:
957 typedef struct intermediate {
961 typedef struct badstr {
966 TREE_ASM_BEING_WRITTEN (type) = 1;
968 /* This change, which ought to make better output,
969 used to make the COFF assembler unhappy.
970 Changes involving KNOWN_TYPE_TAG may fix the problem. */
971 /* Before really doing anything, output types we want to refer to. */
972 /* Note that in version 1 the following two lines
973 are not used if forward references are in use. */
974 if (TREE_CODE (type) != ENUMERAL_TYPE)
975 sdbout_field_types (type);
977 TREE_ASM_WRITTEN (type) = 1;
981 /* Output a structure type. */
983 int size = int_size_in_bytes (type);
986 int i, n_baseclasses = 0;
988 /* Record the type tag, but not in its permanent place just yet. */
989 sdbout_record_type_name (type);
991 PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
993 switch (TREE_CODE (type))
996 PUT_SDB_SCL (C_UNTAG);
997 PUT_SDB_TYPE (T_UNION);
1002 PUT_SDB_SCL (C_STRTAG);
1003 PUT_SDB_TYPE (T_STRUCT);
1008 PUT_SDB_SCL (C_ENTAG);
1009 PUT_SDB_TYPE (T_ENUM);
1014 PUT_SDB_SIZE (size);
1017 /* Print out the base class information with fields
1018 named after the types they hold. */
1019 if (TYPE_BINFO (type)
1020 && TYPE_BINFO_BASETYPES (type))
1021 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1022 for (i = 0; i < n_baseclasses; i++)
1024 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1025 tree child_type = BINFO_TYPE (child);
1026 tree child_type_name;
1027 if (TYPE_NAME (child_type) == 0)
1029 if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
1030 child_type_name = TYPE_NAME (child_type);
1031 else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
1032 child_type_name = DECL_NAME (TYPE_NAME (child_type));
1037 PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
1038 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (BINFO_OFFSET (child)));
1039 PUT_SDB_SCL (member_scl);
1040 sdbout_type (BINFO_TYPE (child));
1044 /* output the individual fields */
1046 if (TREE_CODE (type) == ENUMERAL_TYPE)
1047 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1049 PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1050 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1051 PUT_SDB_SCL (C_MOE);
1052 PUT_SDB_TYPE (T_MOE);
1056 else /* record or union type */
1057 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1058 /* Output the name, type, position (in bits), size (in bits)
1061 /* Omit here the nameless fields that are used to skip bits.
1062 Also omit fields with variable size or position.
1063 Also omit non FIELD_DECL nodes that GNU C++ may put here. */
1064 if (TREE_CODE (tem) == FIELD_DECL
1065 && DECL_NAME (tem) != 0
1066 && TREE_CODE (DECL_SIZE (tem)) == INTEGER_CST
1067 && TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
1070 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (tem)));
1071 if (DECL_BIT_FIELD_TYPE (tem))
1073 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
1074 PUT_SDB_SCL (C_FIELD);
1075 sdbout_type (DECL_BIT_FIELD_TYPE (tem));
1076 PUT_SDB_SIZE (TREE_INT_CST_LOW (DECL_SIZE (tem)));
1080 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))
1082 PUT_SDB_SCL (member_scl);
1083 sdbout_type (TREE_TYPE (tem));
1087 /* output end of a structure,union, or enumeral definition */
1089 PUT_SDB_PLAIN_DEF ("eos");
1090 PUT_SDB_INT_VAL (size);
1091 PUT_SDB_SCL (C_EOS);
1092 PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
1093 PUT_SDB_SIZE (size);
1100 /* The following two functions output definitions of function parameters.
1101 Each parameter gets a definition locating it in the parameter list.
1102 Each parameter that is a register variable gets a second definition
1103 locating it in the register.
1105 Printing or argument lists in gdb uses the definitions that
1106 locate in the parameter list. But reference to the variable in
1107 expressions uses preferentially the definition as a register. */
1109 /* Output definitions, referring to storage in the parmlist,
1110 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
1113 sdbout_parms (parms)
1116 for (; parms; parms = TREE_CHAIN (parms))
1117 if (DECL_NAME (parms))
1119 int current_sym_value = 0;
1120 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1122 if (name == 0 || *name == 0)
1123 name = gen_fake_label ();
1125 /* Perform any necessary register eliminations on the parameter's rtl,
1126 so that the debugging output will be accurate. */
1127 DECL_INCOMING_RTL (parms) =
1128 eliminate_regs (DECL_INCOMING_RTL (parms), 0, 0);
1129 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, 0);
1131 if (PARM_PASSED_IN_MEMORY (parms))
1133 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
1136 /* ??? Here we assume that the parm address is indexed
1137 off the frame pointer or arg pointer.
1138 If that is not true, we produce meaningless results,
1139 but do not crash. */
1140 if (GET_CODE (addr) == PLUS
1141 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
1142 current_sym_value = INTVAL (XEXP (addr, 1));
1144 current_sym_value = 0;
1146 if (GET_CODE (DECL_RTL (parms)) == REG
1147 && REGNO (DECL_RTL (parms)) >= 0
1148 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1149 type = DECL_ARG_TYPE (parms);
1152 int original_sym_value = current_sym_value;
1154 /* This is the case where the parm is passed as an int or
1155 double and it is converted to a char, short or float
1156 and stored back in the parmlist. In this case, describe
1157 the parm with the variable's declared type, and adjust
1158 the address if the least significant bytes (which we are
1159 using) are not the first ones. */
1160 #if BYTES_BIG_ENDIAN
1161 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1162 current_sym_value +=
1163 (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1164 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1166 if (GET_CODE (DECL_RTL (parms)) == MEM
1167 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1168 && (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1170 && (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1171 == current_sym_value))
1172 type = TREE_TYPE (parms);
1175 current_sym_value = original_sym_value;
1176 type = DECL_ARG_TYPE (parms);
1181 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
1182 PUT_SDB_SCL (C_ARG);
1183 PUT_SDB_TYPE (plain_type (type));
1186 else if (GET_CODE (DECL_RTL (parms)) == REG)
1189 /* Parm passed in registers and lives in registers or nowhere. */
1191 /* If parm lives in a register, use that register;
1192 pretend the parm was passed there. It would be more consistent
1193 to describe the register where the parm was passed,
1194 but in practice that register usually holds something else. */
1195 if (REGNO (DECL_RTL (parms)) >= 0
1196 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1197 best_rtl = DECL_RTL (parms);
1198 /* If the parm lives nowhere,
1199 use the register where it was passed. */
1201 best_rtl = DECL_INCOMING_RTL (parms);
1204 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
1205 PUT_SDB_SCL (C_REGPARM);
1206 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1209 else if (GET_CODE (DECL_RTL (parms)) == MEM
1210 && XEXP (DECL_RTL (parms), 0) != const0_rtx)
1212 /* Parm was passed in registers but lives on the stack. */
1214 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
1215 in which case we want the value of that CONST_INT,
1216 or (MEM (REG ...)) or (MEM (MEM ...)),
1217 in which case we use a value of zero. */
1218 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
1219 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
1220 current_sym_value = 0;
1222 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
1224 /* Again, this assumes the offset is based on the arg pointer. */
1226 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
1227 XEXP (DECL_RTL (parms), 0)));
1228 PUT_SDB_SCL (C_ARG);
1229 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1235 /* Output definitions for the places where parms live during the function,
1236 when different from where they were passed, when the parms were passed
1239 It is not useful to do this for parms passed in registers
1240 that live during the function in different registers, because it is
1241 impossible to look in the passed register for the passed value,
1242 so we use the within-the-function register to begin with.
1244 PARMS is a chain of PARM_DECL nodes. */
1247 sdbout_reg_parms (parms)
1250 for (; parms; parms = TREE_CHAIN (parms))
1251 if (DECL_NAME (parms))
1253 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1255 /* Report parms that live in registers during the function
1256 but were passed in memory. */
1257 if (GET_CODE (DECL_RTL (parms)) == REG
1258 && REGNO (DECL_RTL (parms)) >= 0
1259 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
1260 && PARM_PASSED_IN_MEMORY (parms))
1262 if (name == 0 || *name == 0)
1263 name = gen_fake_label ();
1265 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
1266 PUT_SDB_SCL (C_REG);
1267 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1270 /* Report parms that live in memory but not where they were passed. */
1271 else if (GET_CODE (DECL_RTL (parms)) == MEM
1272 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1273 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
1274 && PARM_PASSED_IN_MEMORY (parms)
1275 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
1277 #if 0 /* ??? It is not clear yet what should replace this. */
1278 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
1279 /* A parm declared char is really passed as an int,
1280 so it occupies the least significant bytes.
1281 On a big-endian machine those are not the low-numbered ones. */
1282 #if BYTES_BIG_ENDIAN
1283 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1284 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1285 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1287 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
1290 if (name == 0 || *name == 0)
1291 name = gen_fake_label ();
1293 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
1294 (XEXP (DECL_RTL (parms), 0)));
1295 PUT_SDB_SCL (C_AUTO);
1296 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
1303 /* Describe the beginning of an internal block within a function.
1304 Also output descriptions of variables defined in this block.
1306 N is the number of the block, by order of beginning, counting from 1,
1307 and not counting the outermost (function top-level) block.
1308 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
1309 if the count starts at 0 for the outermost one. */
1312 sdbout_begin_block (file, line, n)
1317 tree decl = current_function_decl;
1318 MAKE_LINE_SAFE (line);
1319 PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
1322 /* Include the outermost BLOCK's variables in block 1. */
1323 next_block_number = 0;
1325 sdbout_block (DECL_INITIAL (decl));
1327 /* If -g1, suppress all the internal symbols of functions
1328 except for arguments. */
1329 if (debug_info_level != DINFO_LEVEL_TERSE)
1331 next_block_number = 0;
1333 sdbout_block (DECL_INITIAL (decl));
1336 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1337 sdbout_dequeue_anonymous_types ();
1341 /* Describe the end line-number of an internal block within a function. */
1344 sdbout_end_block (file, line)
1348 MAKE_LINE_SAFE (line);
1349 PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
1352 /* Output sdb info for the current function name.
1353 Called from assemble_start_function. */
1356 sdbout_mark_begin_function ()
1358 sdbout_symbol (current_function_decl, 0);
1361 /* Called at beginning of function body (after prologue).
1362 Record the function's starting line number, so we can output
1363 relative line numbers for the other lines.
1364 Describe beginning of outermost block.
1365 Also describe the parameter list. */
1368 sdbout_begin_function (line)
1371 sdb_begin_function_line = line - 1;
1372 PUT_SDB_FUNCTION_START (line);
1373 sdbout_parms (DECL_ARGUMENTS (current_function_decl));
1374 sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
1377 /* Called at end of function (before epilogue).
1378 Describe end of outermost block. */
1381 sdbout_end_function (line)
1384 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1385 sdbout_dequeue_anonymous_types ();
1388 MAKE_LINE_SAFE (line);
1389 PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
1391 /* Indicate we are between functions, for line-number output. */
1392 sdb_begin_function_line = -1;
1395 /* Output sdb info for the absolute end of a function.
1396 Called after the epilogue is output. */
1399 sdbout_end_epilogue ()
1401 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
1402 PUT_SDB_EPILOGUE_END (name);
1405 /* Output sdb info for the given label. Called only if LABEL_NAME (insn)
1412 PUT_SDB_DEF (LABEL_NAME (insn));
1414 PUT_SDB_SCL (C_LABEL);
1415 PUT_SDB_TYPE (T_NULL);
1419 #endif /* SDB_DEBUGGING_INFO */