1 /* Output sdb-format symbol table information from GNU compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995 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) && !defined (hpux) && !defined(_WIN32) && !defined(__linux__)
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) TYPE_SYMTAB_POINTER (type)
263 /* Set the sdb tag identifier string for TYPE to NAME. */
265 #define SET_KNOWN_TYPE_TAG(TYPE, NAME) \
266 TYPE_SYMTAB_POINTER (TYPE) = (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 #ifdef RMS_QUICK_HACK_1
290 for (t = syms; t; t = TREE_CHAIN (t))
291 if (DECL_NAME (t) && IDENTIFIER_POINTER (DECL_NAME (t)) != 0
292 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (t)), "__vtbl_ptr_type"))
293 sdbout_symbol (t, 0);
296 #if 0 /* Nothing need be output for the predefined types. */
297 /* Get all permanent types that have typedef names,
298 and output them all, except for those already output. */
300 sdbout_typedefs (syms);
306 /* return the tag identifier for type
310 tag_of_ru_type (type,link)
313 if (TYPE_SYMTAB_ADDRESS (type))
314 return TYPE_SYMTAB_ADDRESS (type);
315 if (link && TREE_PURPOSE (link)
316 && IDENTIFIER_POINTER (TREE_PURPOSE (link)))
317 TYPE_SYMTAB_ADDRESS (type) = IDENTIFIER_POINTER (TREE_PURPOSE (link));
319 return (char *) TYPE_SYMTAB_ADDRESS (type);
323 /* Return a unique string to name an anonymous type. */
330 SDB_GENERATE_FAKE (label, unnamed_struct_number);
331 unnamed_struct_number++;
332 labelstr = (char *) permalloc (strlen (label) + 1);
333 strcpy (labelstr, label);
337 /* Return the number which describes TYPE for SDB.
338 For pointers, etc., this function is recursive.
339 Each record, union or enumeral type must already have had a
340 tag number output. */
342 /* The number is given by d6d5d4d3d2d1bbbb
343 where bbbb is 4 bit basic type, and di indicate one of notype,ptr,fn,array.
344 Thus, char *foo () has bbbb=T_CHAR
347 N_BTMASK= 017 1111 basic type field.
348 N_TSHIFT= 2 derived type shift
349 N_BTSHFT= 4 Basic type shift */
351 /* Produce the number that describes a pointer, function or array type.
352 PREV is the number describing the target, value or element type.
353 DT_type describes how to transform that type. */
354 #define PUSH_DERIVED_LEVEL(DT_type,PREV) \
355 ((((PREV) & ~(int)N_BTMASK) << (int)N_TSHIFT) \
356 | ((int)DT_type << (int)N_BTSHFT) \
357 | ((PREV) & (int)N_BTMASK))
359 /* Number of elements used in sdb_dims. */
360 static int sdb_n_dims = 0;
362 /* Table of array dimensions of current type. */
363 static int sdb_dims[SDB_MAX_DIM];
365 /* Size of outermost array currently being processed. */
366 static int sdb_type_size = -1;
372 int val = plain_type_1 (type, 0);
374 /* If we have already saved up some array dimensions, print them now. */
379 for (i = sdb_n_dims - 1; i > 0; i--)
380 PUT_SDB_NEXT_DIM (sdb_dims[i]);
381 PUT_SDB_LAST_DIM (sdb_dims[0]);
384 sdb_type_size = int_size_in_bytes (type);
385 /* Don't kill sdb if type is not laid out or has variable size. */
386 if (sdb_type_size < 0)
389 /* If we have computed the size of an array containing this type,
391 if (sdb_type_size >= 0)
393 PUT_SDB_SIZE (sdb_type_size);
400 template_name_p (name)
403 register char *ptr = IDENTIFIER_POINTER (name);
404 while (*ptr && *ptr != '<')
411 sdbout_record_type_name (type)
417 if (KNOWN_TYPE_TAG (type))
420 if (TYPE_NAME (type) != 0)
423 /* Find the IDENTIFIER_NODE for the type name. */
424 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
425 t = TYPE_NAME (type);
426 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
428 t = DECL_NAME (TYPE_NAME (type));
429 /* The DECL_NAME for templates includes "<>", which breaks
430 most assemblers. Use its assembler name instead, which
431 has been mangled into being safe. */
432 if (t && template_name_p (t))
433 t = DECL_ASSEMBLER_NAME (TYPE_NAME (type));
436 /* Now get the name as a string, or invent one. */
438 name = IDENTIFIER_POINTER (t);
441 no_name = (name == 0 || *name == 0);
443 name = gen_fake_label ();
445 SET_KNOWN_TYPE_TAG (type, name);
446 #ifdef SDB_ALLOW_FORWARD_REFERENCES
448 sdbout_queue_anonymous_type (type);
452 /* Return the .type value for type TYPE.
454 LEVEL indicates how many levels deep we have recursed into the type.
455 The SDB debug format can only represent 6 derived levels of types.
456 After that, we must output inaccurate debug info. We deliberately
457 stop before the 7th level, so that ADA recursive types will not give an
461 plain_type_1 (type, level)
466 type = void_type_node;
467 else if (type == error_mark_node)
468 type = integer_type_node;
470 type = TYPE_MAIN_VARIANT (type);
472 switch (TREE_CODE (type))
478 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
480 /* Carefully distinguish all the standard types of C,
481 without messing up if the language is not C.
482 Note that we check only for the names that contain spaces;
483 other names might occur by coincidence in other languages. */
484 if (TYPE_NAME (type) != 0
485 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
486 && DECL_NAME (TYPE_NAME (type)) != 0
487 && TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
489 char *name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
491 if (!strcmp (name, "unsigned char"))
493 if (!strcmp (name, "signed char"))
495 if (!strcmp (name, "unsigned int"))
497 if (!strcmp (name, "short int"))
499 if (!strcmp (name, "short unsigned int"))
501 if (!strcmp (name, "long int"))
503 if (!strcmp (name, "long unsigned int"))
507 if (size == CHAR_TYPE_SIZE)
508 return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
509 if (size == SHORT_TYPE_SIZE)
510 return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
511 if (size == INT_TYPE_SIZE)
512 return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
513 if (size == LONG_TYPE_SIZE)
514 return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
515 if (size == LONG_LONG_TYPE_SIZE) /* better than nothing */
516 return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
522 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
523 if (size == FLOAT_TYPE_SIZE)
525 if (size == DOUBLE_TYPE_SIZE)
536 m = plain_type_1 (TREE_TYPE (type), level+1);
537 if (sdb_n_dims < SDB_MAX_DIM)
538 sdb_dims[sdb_n_dims++]
539 = (TYPE_DOMAIN (type)
540 ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1
542 return PUSH_DERIVED_LEVEL (DT_ARY, m);
547 case QUAL_UNION_TYPE:
551 #ifdef SDB_ALLOW_FORWARD_REFERENCES
552 sdbout_record_type_name (type);
554 #ifndef SDB_ALLOW_UNKNOWN_REFERENCES
555 if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
556 #ifdef SDB_ALLOW_FORWARD_REFERENCES
557 || TYPE_MODE (type) != VOIDmode
562 /* Output the referenced structure tag name
563 only if the .def has already been finished.
564 At least on 386, the Unix assembler
565 cannot handle forward references to tags. */
566 /* But the 88100, it requires them, sigh... */
567 /* And the MIPS requires unknown refs as well... */
568 tag = KNOWN_TYPE_TAG (type);
570 /* These 3 lines used to follow the close brace.
571 However, a size of 0 without a tag implies a tag of 0,
572 so if we don't know a tag, we can't mention the size. */
573 sdb_type_size = int_size_in_bytes (type);
574 if (sdb_type_size < 0)
577 return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
578 : (TREE_CODE (type) == UNION_TYPE) ? T_UNION
579 : (TREE_CODE (type) == QUAL_UNION_TYPE) ? T_UNION
589 m = plain_type_1 (TREE_TYPE (type), level+1);
590 return PUSH_DERIVED_LEVEL (DT_PTR, m);
599 m = plain_type_1 (TREE_TYPE (type), level+1);
600 return PUSH_DERIVED_LEVEL (DT_FCN, m);
607 /* Output the symbols defined in block number DO_BLOCK.
608 Set NEXT_BLOCK_NUMBER to 0 before calling.
610 This function works by walking the tree structure of blocks,
611 counting blocks until it finds the desired block. */
613 static int do_block = 0;
615 static int next_block_number;
623 /* Ignore blocks never expanded or otherwise marked as real. */
624 if (TREE_USED (block))
626 /* When we reach the specified block, output its symbols. */
627 if (next_block_number == do_block)
629 sdbout_syms (BLOCK_VARS (block));
632 /* If we are past the specified block, stop the scan. */
633 if (next_block_number > do_block)
638 /* Scan the blocks within this block. */
639 sdbout_block (BLOCK_SUBBLOCKS (block));
642 block = BLOCK_CHAIN (block);
646 /* Call sdbout_symbol on each decl in the chain SYMS. */
654 if (TREE_CODE (syms) != LABEL_DECL)
655 sdbout_symbol (syms, 1);
656 syms = TREE_CHAIN (syms);
660 /* Output SDB information for a symbol described by DECL.
661 LOCAL is nonzero if the symbol is not file-scope. */
664 sdbout_symbol (decl, local)
668 tree type = TREE_TYPE (decl);
669 tree context = NULL_TREE;
674 sdbout_one_type (type);
676 #if 0 /* This loses when functions are marked to be ignored,
677 which happens in the C++ front end. */
678 if (DECL_IGNORED_P (decl))
682 switch (TREE_CODE (decl))
685 /* Enum values are defined by defining the enum type. */
689 /* Don't mention a nested function under its parent. */
690 context = decl_function_context (decl);
691 if (context == current_function_decl)
693 if (DECL_EXTERNAL (decl))
695 if (GET_CODE (DECL_RTL (decl)) != MEM
696 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
698 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
699 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
700 PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
704 /* Done with tagged types. */
705 if (DECL_NAME (decl) == 0)
707 if (DECL_IGNORED_P (decl))
710 /* Output typedef name. */
711 if (template_name_p (DECL_NAME (decl)))
712 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
714 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
715 PUT_SDB_SCL (C_TPDEF);
719 /* Parm decls go in their own separate chains
720 and are output by sdbout_reg_parms and sdbout_parms. */
724 /* Don't mention a variable that is external.
725 Let the file that defines it describe it. */
726 if (DECL_EXTERNAL (decl))
729 /* Ignore __FUNCTION__, etc. */
730 if (DECL_IGNORED_P (decl))
733 /* If there was an error in the declaration, don't dump core
734 if there is no RTL associated with the variable doesn't
736 if (DECL_RTL (decl) == 0)
739 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
740 #ifdef LEAF_REG_REMAP
742 leaf_renumber_regs_insn (DECL_RTL (decl));
744 value = DECL_RTL (decl);
746 /* Don't mention a variable at all
747 if it was completely optimized into nothingness.
749 If DECL was from an inline function, then its rtl
750 is not identically the rtl that was used in this
751 particular compilation. */
752 if (GET_CODE (value) == REG)
754 regno = REGNO (DECL_RTL (decl));
755 if (regno >= FIRST_PSEUDO_REGISTER)
758 else if (GET_CODE (value) == SUBREG)
761 while (GET_CODE (value) == SUBREG)
763 offset += SUBREG_WORD (value);
764 value = SUBREG_REG (value);
766 if (GET_CODE (value) == REG)
768 regno = REGNO (value);
769 if (regno >= FIRST_PSEUDO_REGISTER)
773 alter_subreg (DECL_RTL (decl));
774 value = DECL_RTL (decl);
776 /* Don't output anything if an auto variable
777 gets RTL that is static.
778 GAS version 2.2 can't handle such output. */
779 else if (GET_CODE (value) == MEM && CONSTANT_P (XEXP (value, 0))
780 && ! TREE_STATIC (decl))
783 /* Emit any structure, union, or enum type that has not been output.
784 This occurs for tag-less structs (et al) used to declare variables
786 if (TREE_CODE (type) == ENUMERAL_TYPE
787 || TREE_CODE (type) == RECORD_TYPE
788 || TREE_CODE (type) == UNION_TYPE
789 || TREE_CODE (type) == QUAL_UNION_TYPE)
791 if (TYPE_SIZE (type) != 0 /* not a forward reference */
792 && KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
793 sdbout_one_type (type);
796 /* Defer SDB information for top-level initialized variables! */
798 && GET_CODE (value) == MEM
799 && DECL_INITIAL (decl))
802 /* C++ in 2.3 makes nameless symbols. That will be fixed later.
803 For now, avoid crashing. */
804 if (DECL_NAME (decl) == NULL_TREE)
807 /* Record the name for, starting a symtab entry. */
808 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
810 if (GET_CODE (value) == MEM
811 && GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
814 if (TREE_PUBLIC (decl))
816 PUT_SDB_VAL (XEXP (value, 0));
821 PUT_SDB_VAL (XEXP (value, 0));
822 PUT_SDB_SCL (C_STAT);
828 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
831 else if (GET_CODE (value) == MEM
832 && (GET_CODE (XEXP (value, 0)) == MEM
833 || (GET_CODE (XEXP (value, 0)) == REG
834 && REGNO (XEXP (value, 0)) != HARD_FRAME_POINTER_REGNUM
835 && REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
836 /* If the value is indirect by memory or by a register
837 that isn't the frame pointer
838 then it means the object is variable-sized and address through
839 that register or stack slot. COFF has no way to represent this
840 so all we can do is output the variable as a pointer. */
843 if (GET_CODE (XEXP (value, 0)) == REG)
845 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
850 /* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
852 We want the value of that CONST_INT. */
853 /* Encore compiler hates a newline in a macro arg, it seems. */
854 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
855 (XEXP (XEXP (value, 0), 0)));
856 PUT_SDB_SCL (C_AUTO);
859 type = build_pointer_type (TREE_TYPE (decl));
861 else if (GET_CODE (value) == MEM
862 && ((GET_CODE (XEXP (value, 0)) == PLUS
863 && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
864 && GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
865 /* This is for variables which are at offset zero from
866 the frame pointer. This happens on the Alpha.
867 Non-frame pointer registers are excluded above. */
868 || (GET_CODE (XEXP (value, 0)) == REG)))
870 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
871 or (MEM (REG...)). We want the value of that CONST_INT
874 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
875 PUT_SDB_SCL (C_AUTO);
877 else if (GET_CODE (value) == MEM && GET_CODE (XEXP (value, 0)) == CONST)
879 /* Handle an obscure case which can arise when optimizing and
880 when there are few available registers. (This is *always*
881 the case for i386/i486 targets). The DECL_RTL looks like
882 (MEM (CONST ...)) even though this variable is a local `auto'
883 or a local `register' variable. In effect, what has happened
884 is that the reload pass has seen that all assignments and
885 references for one such a local variable can be replaced by
886 equivalent assignments and references to some static storage
887 variable, thereby avoiding the need for a register. In such
888 cases we're forced to lie to debuggers and tell them that
889 this variable was itself `static'. */
891 PUT_SDB_VAL (XEXP (XEXP (value, 0), 0));
892 PUT_SDB_SCL (C_STAT);
896 /* It is something we don't know how to represent for SDB. */
901 PUT_SDB_TYPE (plain_type (type));
905 /* Output SDB information for a top-level initialized variable
906 that has been delayed. */
909 sdbout_toplevel_data (decl)
912 tree type = TREE_TYPE (decl);
914 if (DECL_IGNORED_P (decl))
917 if (! (TREE_CODE (decl) == VAR_DECL
918 && GET_CODE (DECL_RTL (decl)) == MEM
919 && DECL_INITIAL (decl)))
922 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
923 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
924 if (TREE_PUBLIC (decl))
930 PUT_SDB_SCL (C_STAT);
932 PUT_SDB_TYPE (plain_type (type));
936 #ifdef SDB_ALLOW_FORWARD_REFERENCES
938 /* Machinery to record and output anonymous types. */
940 static tree anonymous_types;
943 sdbout_queue_anonymous_type (type)
946 anonymous_types = saveable_tree_cons (NULL_TREE, type, anonymous_types);
950 sdbout_dequeue_anonymous_types ()
952 register tree types, link;
954 while (anonymous_types)
956 types = nreverse (anonymous_types);
957 anonymous_types = NULL_TREE;
959 for (link = types; link; link = TREE_CHAIN (link))
961 register tree type = TREE_VALUE (link);
963 if (type && ! TREE_ASM_WRITTEN (type))
964 sdbout_one_type (type);
971 /* Given a chain of ..._TYPE nodes, all of which have names,
972 output definitions of those names, as typedefs. */
980 for (link = types; link; link = TREE_CHAIN (link))
981 sdbout_one_type (link);
983 #ifdef SDB_ALLOW_FORWARD_REFERENCES
984 sdbout_dequeue_anonymous_types ();
992 if (type == error_mark_node)
993 type = integer_type_node;
994 PUT_SDB_TYPE (plain_type (type));
997 /* Output types of the fields of type TYPE, if they are structs.
999 Formerly did not chase through pointer types, since that could be circular.
1000 They must come before TYPE, since forward refs are not allowed.
1001 Now james@bigtex.cactus.org says to try them. */
1004 sdbout_field_types (type)
1008 for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
1009 if (TREE_CODE (TREE_TYPE (tail)) == POINTER_TYPE)
1010 sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
1012 sdbout_one_type (TREE_TYPE (tail));
1015 /* Use this to put out the top level defined record and union types
1016 for later reference. If this is a struct with a name, then put that
1017 name out. Other unnamed structs will have .xxfake labels generated so
1018 that they may be referred to later.
1019 The label will be stored in the KNOWN_TYPE_TAG slot of a type.
1020 It may NOT be called recursively. */
1023 sdbout_one_type (type)
1026 if (current_function_decl != NULL_TREE
1027 && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
1028 ; /* Don't change section amid function. */
1032 switch (TREE_CODE (type))
1036 case QUAL_UNION_TYPE:
1038 type = TYPE_MAIN_VARIANT (type);
1039 /* Don't output a type twice. */
1040 if (TREE_ASM_WRITTEN (type))
1041 /* James said test TREE_ASM_BEING_WRITTEN here. */
1044 /* Output nothing if type is not yet defined. */
1045 if (TYPE_SIZE (type) == 0)
1048 TREE_ASM_WRITTEN (type) = 1;
1050 /* This is reputed to cause trouble with the following case,
1051 but perhaps checking TYPE_SIZE above will fix it. */
1053 /* Here is a test case:
1059 typedef struct intermediate {
1063 typedef struct badstr {
1068 TREE_ASM_BEING_WRITTEN (type) = 1;
1070 /* This change, which ought to make better output,
1071 used to make the COFF assembler unhappy.
1072 Changes involving KNOWN_TYPE_TAG may fix the problem. */
1073 /* Before really doing anything, output types we want to refer to. */
1074 /* Note that in version 1 the following two lines
1075 are not used if forward references are in use. */
1076 if (TREE_CODE (type) != ENUMERAL_TYPE)
1077 sdbout_field_types (type);
1079 TREE_ASM_WRITTEN (type) = 1;
1083 /* Output a structure type. */
1085 int size = int_size_in_bytes (type);
1088 int i, n_baseclasses = 0;
1090 /* Record the type tag, but not in its permanent place just yet. */
1091 sdbout_record_type_name (type);
1093 PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
1095 switch (TREE_CODE (type))
1098 case QUAL_UNION_TYPE:
1099 PUT_SDB_SCL (C_UNTAG);
1100 PUT_SDB_TYPE (T_UNION);
1105 PUT_SDB_SCL (C_STRTAG);
1106 PUT_SDB_TYPE (T_STRUCT);
1111 PUT_SDB_SCL (C_ENTAG);
1112 PUT_SDB_TYPE (T_ENUM);
1117 PUT_SDB_SIZE (size);
1120 /* Print out the base class information with fields
1121 named after the types they hold. */
1122 if (TYPE_BINFO (type)
1123 && TYPE_BINFO_BASETYPES (type))
1124 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1125 for (i = 0; i < n_baseclasses; i++)
1127 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1128 tree child_type = BINFO_TYPE (child);
1129 tree child_type_name;
1130 if (TYPE_NAME (child_type) == 0)
1132 if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
1133 child_type_name = TYPE_NAME (child_type);
1134 else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
1136 child_type_name = DECL_NAME (TYPE_NAME (child_type));
1137 if (child_type_name && template_name_p (child_type_name))
1139 = DECL_ASSEMBLER_NAME (TYPE_NAME (child_type));
1145 PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
1146 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (BINFO_OFFSET (child)));
1147 PUT_SDB_SCL (member_scl);
1148 sdbout_type (BINFO_TYPE (child));
1152 /* output the individual fields */
1154 if (TREE_CODE (type) == ENUMERAL_TYPE)
1155 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1157 PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1158 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1159 PUT_SDB_SCL (C_MOE);
1160 PUT_SDB_TYPE (T_MOE);
1164 else /* record or union type */
1165 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1166 /* Output the name, type, position (in bits), size (in bits)
1169 /* Omit here the nameless fields that are used to skip bits.
1170 Also omit fields with variable size or position.
1171 Also omit non FIELD_DECL nodes that GNU C++ may put here. */
1172 if (TREE_CODE (tem) == FIELD_DECL
1173 && DECL_NAME (tem) != 0
1174 && TREE_CODE (DECL_SIZE (tem)) == INTEGER_CST
1175 && TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
1180 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
1182 if (DECL_BIT_FIELD_TYPE (tem))
1184 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
1185 PUT_SDB_SCL (C_FIELD);
1186 sdbout_type (DECL_BIT_FIELD_TYPE (tem));
1187 PUT_SDB_SIZE (TREE_INT_CST_LOW (DECL_SIZE (tem)));
1191 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))
1193 PUT_SDB_SCL (member_scl);
1194 sdbout_type (TREE_TYPE (tem));
1198 /* output end of a structure,union, or enumeral definition */
1200 PUT_SDB_PLAIN_DEF ("eos");
1201 PUT_SDB_INT_VAL (size);
1202 PUT_SDB_SCL (C_EOS);
1203 PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
1204 PUT_SDB_SIZE (size);
1211 /* The following two functions output definitions of function parameters.
1212 Each parameter gets a definition locating it in the parameter list.
1213 Each parameter that is a register variable gets a second definition
1214 locating it in the register.
1216 Printing or argument lists in gdb uses the definitions that
1217 locate in the parameter list. But reference to the variable in
1218 expressions uses preferentially the definition as a register. */
1220 /* Output definitions, referring to storage in the parmlist,
1221 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
1224 sdbout_parms (parms)
1227 for (; parms; parms = TREE_CHAIN (parms))
1228 if (DECL_NAME (parms))
1230 int current_sym_value = 0;
1231 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1233 if (name == 0 || *name == 0)
1234 name = gen_fake_label ();
1236 /* Perform any necessary register eliminations on the parameter's rtl,
1237 so that the debugging output will be accurate. */
1238 DECL_INCOMING_RTL (parms) =
1239 eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
1240 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
1242 if (PARM_PASSED_IN_MEMORY (parms))
1244 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
1247 /* ??? Here we assume that the parm address is indexed
1248 off the frame pointer or arg pointer.
1249 If that is not true, we produce meaningless results,
1250 but do not crash. */
1251 if (GET_CODE (addr) == PLUS
1252 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
1253 current_sym_value = INTVAL (XEXP (addr, 1));
1255 current_sym_value = 0;
1257 if (GET_CODE (DECL_RTL (parms)) == REG
1258 && REGNO (DECL_RTL (parms)) >= 0
1259 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1260 type = DECL_ARG_TYPE (parms);
1263 int original_sym_value = current_sym_value;
1265 /* This is the case where the parm is passed as an int or
1266 double and it is converted to a char, short or float
1267 and stored back in the parmlist. In this case, describe
1268 the parm with the variable's declared type, and adjust
1269 the address if the least significant bytes (which we are
1270 using) are not the first ones. */
1271 if (BYTES_BIG_ENDIAN
1272 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1273 current_sym_value +=
1274 (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1275 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1277 if (GET_CODE (DECL_RTL (parms)) == MEM
1278 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1279 && (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1281 && (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1282 == current_sym_value))
1283 type = TREE_TYPE (parms);
1286 current_sym_value = original_sym_value;
1287 type = DECL_ARG_TYPE (parms);
1292 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
1293 PUT_SDB_SCL (C_ARG);
1294 PUT_SDB_TYPE (plain_type (type));
1297 else if (GET_CODE (DECL_RTL (parms)) == REG)
1300 /* Parm passed in registers and lives in registers or nowhere. */
1302 /* If parm lives in a register, use that register;
1303 pretend the parm was passed there. It would be more consistent
1304 to describe the register where the parm was passed,
1305 but in practice that register usually holds something else. */
1306 if (REGNO (DECL_RTL (parms)) >= 0
1307 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1308 best_rtl = DECL_RTL (parms);
1309 /* If the parm lives nowhere,
1310 use the register where it was passed. */
1312 best_rtl = DECL_INCOMING_RTL (parms);
1315 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
1316 PUT_SDB_SCL (C_REGPARM);
1317 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1320 else if (GET_CODE (DECL_RTL (parms)) == MEM
1321 && XEXP (DECL_RTL (parms), 0) != const0_rtx)
1323 /* Parm was passed in registers but lives on the stack. */
1325 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
1326 in which case we want the value of that CONST_INT,
1327 or (MEM (REG ...)) or (MEM (MEM ...)),
1328 in which case we use a value of zero. */
1329 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
1330 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
1331 current_sym_value = 0;
1333 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
1335 /* Again, this assumes the offset is based on the arg pointer. */
1337 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
1338 XEXP (DECL_RTL (parms), 0)));
1339 PUT_SDB_SCL (C_ARG);
1340 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1346 /* Output definitions for the places where parms live during the function,
1347 when different from where they were passed, when the parms were passed
1350 It is not useful to do this for parms passed in registers
1351 that live during the function in different registers, because it is
1352 impossible to look in the passed register for the passed value,
1353 so we use the within-the-function register to begin with.
1355 PARMS is a chain of PARM_DECL nodes. */
1358 sdbout_reg_parms (parms)
1361 for (; parms; parms = TREE_CHAIN (parms))
1362 if (DECL_NAME (parms))
1364 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1366 /* Report parms that live in registers during the function
1367 but were passed in memory. */
1368 if (GET_CODE (DECL_RTL (parms)) == REG
1369 && REGNO (DECL_RTL (parms)) >= 0
1370 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
1371 && PARM_PASSED_IN_MEMORY (parms))
1373 if (name == 0 || *name == 0)
1374 name = gen_fake_label ();
1376 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
1377 PUT_SDB_SCL (C_REG);
1378 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1381 /* Report parms that live in memory but not where they were passed. */
1382 else if (GET_CODE (DECL_RTL (parms)) == MEM
1383 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1384 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
1385 && PARM_PASSED_IN_MEMORY (parms)
1386 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
1388 #if 0 /* ??? It is not clear yet what should replace this. */
1389 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
1390 /* A parm declared char is really passed as an int,
1391 so it occupies the least significant bytes.
1392 On a big-endian machine those are not the low-numbered ones. */
1393 if (BYTES_BIG_ENDIAN
1395 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1396 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1397 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1398 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
1401 if (name == 0 || *name == 0)
1402 name = gen_fake_label ();
1404 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
1405 (XEXP (DECL_RTL (parms), 0)));
1406 PUT_SDB_SCL (C_AUTO);
1407 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
1414 /* Describe the beginning of an internal block within a function.
1415 Also output descriptions of variables defined in this block.
1417 N is the number of the block, by order of beginning, counting from 1,
1418 and not counting the outermost (function top-level) block.
1419 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
1420 if the count starts at 0 for the outermost one. */
1423 sdbout_begin_block (file, line, n)
1428 tree decl = current_function_decl;
1429 MAKE_LINE_SAFE (line);
1431 /* The SCO compiler does not emit a separate block for the function level
1432 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1433 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1434 #ifndef MIPS_DEBUGGING_INFO
1437 PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
1441 /* Include the outermost BLOCK's variables in block 1. */
1442 next_block_number = 0;
1444 sdbout_block (DECL_INITIAL (decl));
1446 /* If -g1, suppress all the internal symbols of functions
1447 except for arguments. */
1448 if (debug_info_level != DINFO_LEVEL_TERSE)
1450 next_block_number = 0;
1452 sdbout_block (DECL_INITIAL (decl));
1455 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1456 sdbout_dequeue_anonymous_types ();
1460 /* Describe the end line-number of an internal block within a function. */
1463 sdbout_end_block (file, line, n)
1468 MAKE_LINE_SAFE (line);
1470 /* The SCO compiler does not emit a separate block for the function level
1471 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1472 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1473 #ifndef MIPS_DEBUGGING_INFO
1476 PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
1479 /* Output sdb info for the current function name.
1480 Called from assemble_start_function. */
1483 sdbout_mark_begin_function ()
1485 sdbout_symbol (current_function_decl, 0);
1488 /* Called at beginning of function body (after prologue).
1489 Record the function's starting line number, so we can output
1490 relative line numbers for the other lines.
1491 Describe beginning of outermost block.
1492 Also describe the parameter list. */
1495 sdbout_begin_function (line)
1498 sdb_begin_function_line = line - 1;
1499 PUT_SDB_FUNCTION_START (line);
1500 sdbout_parms (DECL_ARGUMENTS (current_function_decl));
1501 sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
1504 /* Called at end of function (before epilogue).
1505 Describe end of outermost block. */
1508 sdbout_end_function (line)
1511 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1512 sdbout_dequeue_anonymous_types ();
1515 MAKE_LINE_SAFE (line);
1516 PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
1518 /* Indicate we are between functions, for line-number output. */
1519 sdb_begin_function_line = -1;
1522 /* Output sdb info for the absolute end of a function.
1523 Called after the epilogue is output. */
1526 sdbout_end_epilogue ()
1528 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
1529 PUT_SDB_EPILOGUE_END (name);
1532 /* Output sdb info for the given label. Called only if LABEL_NAME (insn)
1539 PUT_SDB_DEF (LABEL_NAME (insn));
1541 PUT_SDB_SCL (C_LABEL);
1542 PUT_SDB_TYPE (T_NULL);
1546 #endif /* SDB_DEBUGGING_INFO */