1 /* Support for printing Pascal types for GDB, the GNU debugger.
2 Copyright (C) 2000-2020 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program 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 3 of the License, or
9 (at your option) any later version.
11 This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This file is derived from p-typeprint.c */
22 #include "gdb_obstack.h"
23 #include "bfd.h" /* Binary File Description */
26 #include "expression.h"
32 #include "typeprint.h"
33 #include "gdb-demangle.h"
35 #include "cli/cli-style.h"
37 static void pascal_type_print_varspec_suffix (struct type
*, struct ui_file
*,
39 const struct type_print_options
*);
41 static void pascal_type_print_derivation_info (struct ui_file
*,
46 /* LEVEL is the depth to indent lines by. */
49 pascal_print_type (struct type
*type
, const char *varstring
,
50 struct ui_file
*stream
, int show
, int level
,
51 const struct type_print_options
*flags
)
56 code
= TYPE_CODE (type
);
59 type
= check_typedef (type
);
61 if ((code
== TYPE_CODE_FUNC
62 || code
== TYPE_CODE_METHOD
))
64 pascal_type_print_varspec_prefix (type
, stream
, show
, 0, flags
);
67 fputs_filtered (varstring
, stream
);
69 if ((varstring
!= NULL
&& *varstring
!= '\0')
70 && !(code
== TYPE_CODE_FUNC
71 || code
== TYPE_CODE_METHOD
))
73 fputs_filtered (" : ", stream
);
76 if (!(code
== TYPE_CODE_FUNC
77 || code
== TYPE_CODE_METHOD
))
79 pascal_type_print_varspec_prefix (type
, stream
, show
, 0, flags
);
82 pascal_type_print_base (type
, stream
, show
, level
, flags
);
83 /* For demangled function names, we have the arglist as part of the name,
84 so don't print an additional pair of ()'s. */
86 demangled_args
= varstring
? strchr (varstring
, '(') != NULL
: 0;
87 pascal_type_print_varspec_suffix (type
, stream
, show
, 0, demangled_args
,
92 /* Print a typedef using Pascal syntax. TYPE is the underlying type.
93 NEW_SYMBOL is the symbol naming the type. STREAM is the stream on
97 pascal_print_typedef (struct type
*type
, struct symbol
*new_symbol
,
98 struct ui_file
*stream
)
100 type
= check_typedef (type
);
101 fprintf_filtered (stream
, "type ");
102 fprintf_filtered (stream
, "%s = ", new_symbol
->print_name ());
103 type_print (type
, "", stream
, 0);
104 fprintf_filtered (stream
, ";");
107 /* If TYPE is a derived type, then print out derivation information.
108 Print only the actual base classes of this type, not the base classes
109 of the base classes. I.e. for the derivation hierarchy:
112 class B : public A {int b; };
113 class C : public B {int c; };
115 Print the type of class C as:
121 Not as the following (like gdb used to), which is not legal C++ syntax for
122 derived types and may be confused with the multiple inheritance form:
124 class C : public B : public A {
128 In general, gdb should try to print the types as closely as possible to
129 the form that they appear in the source code. */
132 pascal_type_print_derivation_info (struct ui_file
*stream
, struct type
*type
)
137 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
139 fputs_filtered (i
== 0 ? ": " : ", ", stream
);
140 fprintf_filtered (stream
, "%s%s ",
141 BASETYPE_VIA_PUBLIC (type
, i
) ? "public" : "private",
142 BASETYPE_VIA_VIRTUAL (type
, i
) ? " virtual" : "");
143 name
= TYPE_NAME (TYPE_BASECLASS (type
, i
));
144 fprintf_filtered (stream
, "%s", name
? name
: "(null)");
148 fputs_filtered (" ", stream
);
152 /* Print the Pascal method arguments ARGS to the file STREAM. */
155 pascal_type_print_method_args (const char *physname
, const char *methodname
,
156 struct ui_file
*stream
)
158 int is_constructor
= (startswith (physname
, "__ct__"));
159 int is_destructor
= (startswith (physname
, "__dt__"));
161 if (is_constructor
|| is_destructor
)
166 fputs_filtered (methodname
, stream
);
168 if (physname
&& (*physname
!= 0))
170 fputs_filtered (" (", stream
);
171 /* We must demangle this. */
172 while (isdigit (physname
[0]))
178 while (isdigit (physname
[len
]))
182 i
= strtol (physname
, &argname
, 0);
185 for (j
= 0; j
< i
; ++j
)
186 fputc_filtered (physname
[j
], stream
);
189 if (physname
[0] != 0)
191 fputs_filtered (", ", stream
);
194 fputs_filtered (")", stream
);
198 /* Print any asterisks or open-parentheses needed before the
199 variable name (to describe its type).
201 On outermost call, pass 0 for PASSED_A_PTR.
202 On outermost call, SHOW > 0 means should ignore
203 any typename for TYPE and show its details.
204 SHOW is always zero on recursive calls. */
207 pascal_type_print_varspec_prefix (struct type
*type
, struct ui_file
*stream
,
208 int show
, int passed_a_ptr
,
209 const struct type_print_options
*flags
)
214 if (TYPE_NAME (type
) && show
<= 0)
219 switch (TYPE_CODE (type
))
222 fprintf_filtered (stream
, "^");
223 pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type
), stream
, 0, 1,
225 break; /* Pointer should be handled normally
228 case TYPE_CODE_METHOD
:
230 fprintf_filtered (stream
, "(");
231 if (TYPE_TARGET_TYPE (type
) != NULL
232 && TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
234 fprintf_filtered (stream
, "function ");
238 fprintf_filtered (stream
, "procedure ");
243 fprintf_filtered (stream
, " ");
244 pascal_type_print_base (TYPE_SELF_TYPE (type
),
245 stream
, 0, passed_a_ptr
, flags
);
246 fprintf_filtered (stream
, "::");
251 pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type
), stream
, 0, 1,
253 fprintf_filtered (stream
, "&");
258 fprintf_filtered (stream
, "(");
260 if (TYPE_TARGET_TYPE (type
) != NULL
261 && TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
263 fprintf_filtered (stream
, "function ");
267 fprintf_filtered (stream
, "procedure ");
272 case TYPE_CODE_ARRAY
:
274 fprintf_filtered (stream
, "(");
275 fprintf_filtered (stream
, "array ");
276 if (TYPE_LENGTH (TYPE_TARGET_TYPE (type
)) > 0
277 && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))
278 fprintf_filtered (stream
, "[%s..%s] ",
279 plongest (TYPE_ARRAY_LOWER_BOUND_VALUE (type
)),
280 plongest (TYPE_ARRAY_UPPER_BOUND_VALUE (type
)));
281 fprintf_filtered (stream
, "of ");
284 case TYPE_CODE_UNDEF
:
285 case TYPE_CODE_STRUCT
:
286 case TYPE_CODE_UNION
:
291 case TYPE_CODE_ERROR
:
295 case TYPE_CODE_RANGE
:
296 case TYPE_CODE_STRING
:
297 case TYPE_CODE_COMPLEX
:
298 case TYPE_CODE_TYPEDEF
:
299 /* These types need no prefix. They are listed here so that
300 gcc -Wall will reveal any types that haven't been handled. */
303 error (_("type not handled in pascal_type_print_varspec_prefix()"));
309 pascal_print_func_args (struct type
*type
, struct ui_file
*stream
,
310 const struct type_print_options
*flags
)
312 int i
, len
= TYPE_NFIELDS (type
);
316 fprintf_filtered (stream
, "(");
318 for (i
= 0; i
< len
; i
++)
322 fputs_filtered (", ", stream
);
325 /* Can we find if it is a var parameter ??
326 if ( TYPE_FIELD(type, i) == )
328 fprintf_filtered (stream, "var ");
330 pascal_print_type (TYPE_FIELD_TYPE (type
, i
), "" /* TYPE_FIELD_NAME
332 ,stream
, -1, 0, flags
);
336 fprintf_filtered (stream
, ")");
340 /* Helper for pascal_type_print_varspec_suffix to print the suffix of
341 a function or method. */
344 pascal_type_print_func_varspec_suffix (struct type
*type
, struct ui_file
*stream
,
345 int show
, int passed_a_ptr
,
347 const struct type_print_options
*flags
)
349 if (TYPE_TARGET_TYPE (type
) == NULL
350 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
352 fprintf_filtered (stream
, " : ");
353 pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type
),
354 stream
, 0, 0, flags
);
356 if (TYPE_TARGET_TYPE (type
) == NULL
)
357 type_print_unknown_return_type (stream
);
359 pascal_type_print_base (TYPE_TARGET_TYPE (type
), stream
, show
, 0,
362 pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type
), stream
, 0,
363 passed_a_ptr
, 0, flags
);
367 /* Print any array sizes, function arguments or close parentheses
368 needed after the variable name (to describe its type).
369 Args work like pascal_type_print_varspec_prefix. */
372 pascal_type_print_varspec_suffix (struct type
*type
, struct ui_file
*stream
,
373 int show
, int passed_a_ptr
,
375 const struct type_print_options
*flags
)
380 if (TYPE_NAME (type
) && show
<= 0)
385 switch (TYPE_CODE (type
))
387 case TYPE_CODE_ARRAY
:
389 fprintf_filtered (stream
, ")");
392 case TYPE_CODE_METHOD
:
394 fprintf_filtered (stream
, ")");
395 pascal_type_print_method_args ("",
398 pascal_type_print_func_varspec_suffix (type
, stream
, show
,
399 passed_a_ptr
, 0, flags
);
404 pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type
),
405 stream
, 0, 1, 0, flags
);
410 fprintf_filtered (stream
, ")");
412 pascal_print_func_args (type
, stream
, flags
);
413 pascal_type_print_func_varspec_suffix (type
, stream
, show
,
414 passed_a_ptr
, 0, flags
);
417 case TYPE_CODE_UNDEF
:
418 case TYPE_CODE_STRUCT
:
419 case TYPE_CODE_UNION
:
424 case TYPE_CODE_ERROR
:
428 case TYPE_CODE_RANGE
:
429 case TYPE_CODE_STRING
:
430 case TYPE_CODE_COMPLEX
:
431 case TYPE_CODE_TYPEDEF
:
432 /* These types do not need a suffix. They are listed so that
433 gcc -Wall will report types that may not have been considered. */
436 error (_("type not handled in pascal_type_print_varspec_suffix()"));
441 /* Print the name of the type (or the ultimate pointer target,
442 function value or array element), or the description of a
445 SHOW positive means print details about the type (e.g. enum values),
446 and print structure elements passing SHOW - 1 for show.
447 SHOW negative means just print the type name or struct tag if there is one.
448 If there is no name, print something sensible but concise like
450 SHOW zero means just print the type name or struct tag if there is one.
451 If there is no name, print something sensible but not as concise like
452 "struct {int x; int y;}".
454 LEVEL is the number of spaces to indent by.
455 We increase it for some recursive calls. */
458 pascal_type_print_base (struct type
*type
, struct ui_file
*stream
, int show
,
459 int level
, const struct type_print_options
*flags
)
466 s_none
, s_public
, s_private
, s_protected
474 fputs_styled ("<type unknown>", metadata_style
.style (), stream
);
479 if ((TYPE_CODE (type
) == TYPE_CODE_PTR
)
480 && (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_VOID
))
482 fputs_filtered (TYPE_NAME (type
) ? TYPE_NAME (type
) : "pointer",
486 /* When SHOW is zero or less, and there is a valid type name, then always
487 just print the type name directly from the type. */
490 && TYPE_NAME (type
) != NULL
)
492 fputs_filtered (TYPE_NAME (type
), stream
);
496 type
= check_typedef (type
);
498 switch (TYPE_CODE (type
))
500 case TYPE_CODE_TYPEDEF
:
503 /* case TYPE_CODE_FUNC:
504 case TYPE_CODE_METHOD: */
505 pascal_type_print_base (TYPE_TARGET_TYPE (type
), stream
, show
, level
,
509 case TYPE_CODE_ARRAY
:
510 /* pascal_type_print_varspec_prefix (TYPE_TARGET_TYPE (type),
512 pascal_type_print_base (TYPE_TARGET_TYPE (type),
513 stream, show, level);
514 pascal_type_print_varspec_suffix (TYPE_TARGET_TYPE (type),
516 pascal_print_type (TYPE_TARGET_TYPE (type
), NULL
, stream
, 0, 0, flags
);
520 case TYPE_CODE_METHOD
:
522 pascal_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
523 only after args !! */
525 case TYPE_CODE_STRUCT
:
526 if (TYPE_NAME (type
) != NULL
)
528 fputs_filtered (TYPE_NAME (type
), stream
);
529 fputs_filtered (" = ", stream
);
531 if (HAVE_CPLUS_STRUCT (type
))
533 fprintf_filtered (stream
, "class ");
537 fprintf_filtered (stream
, "record ");
541 case TYPE_CODE_UNION
:
542 if (TYPE_NAME (type
) != NULL
)
544 fputs_filtered (TYPE_NAME (type
), stream
);
545 fputs_filtered (" = ", stream
);
547 fprintf_filtered (stream
, "case <?> of ");
553 /* If we just printed a tag name, no need to print anything else. */
554 if (TYPE_NAME (type
) == NULL
)
555 fprintf_filtered (stream
, "{...}");
557 else if (show
> 0 || TYPE_NAME (type
) == NULL
)
559 pascal_type_print_derivation_info (stream
, type
);
561 fprintf_filtered (stream
, "\n");
562 if ((TYPE_NFIELDS (type
) == 0) && (TYPE_NFN_FIELDS (type
) == 0))
564 if (TYPE_STUB (type
))
565 fprintfi_filtered (level
+ 4, stream
, "<incomplete type>\n");
567 fprintfi_filtered (level
+ 4, stream
, "<no data fields>\n");
570 /* Start off with no specific section type, so we can print
571 one for the first field we find, and use that section type
572 thereafter until we find another type. */
574 section_type
= s_none
;
576 /* If there is a base class for this type,
577 do not print the field that it occupies. */
579 len
= TYPE_NFIELDS (type
);
580 for (i
= TYPE_N_BASECLASSES (type
); i
< len
; i
++)
583 /* Don't print out virtual function table. */
584 if ((startswith (TYPE_FIELD_NAME (type
, i
), "_vptr"))
585 && is_cplus_marker ((TYPE_FIELD_NAME (type
, i
))[5]))
588 /* If this is a pascal object or class we can print the
589 various section labels. */
591 if (HAVE_CPLUS_STRUCT (type
))
593 if (TYPE_FIELD_PROTECTED (type
, i
))
595 if (section_type
!= s_protected
)
597 section_type
= s_protected
;
598 fprintfi_filtered (level
+ 2, stream
,
602 else if (TYPE_FIELD_PRIVATE (type
, i
))
604 if (section_type
!= s_private
)
606 section_type
= s_private
;
607 fprintfi_filtered (level
+ 2, stream
, "private\n");
612 if (section_type
!= s_public
)
614 section_type
= s_public
;
615 fprintfi_filtered (level
+ 2, stream
, "public\n");
620 print_spaces_filtered (level
+ 4, stream
);
621 if (field_is_static (&TYPE_FIELD (type
, i
)))
622 fprintf_filtered (stream
, "static ");
623 pascal_print_type (TYPE_FIELD_TYPE (type
, i
),
624 TYPE_FIELD_NAME (type
, i
),
625 stream
, show
- 1, level
+ 4, flags
);
626 if (!field_is_static (&TYPE_FIELD (type
, i
))
627 && TYPE_FIELD_PACKED (type
, i
))
629 /* It is a bitfield. This code does not attempt
630 to look at the bitpos and reconstruct filler,
631 unnamed fields. This would lead to misleading
632 results if the compiler does not put out fields
633 for such things (I don't know what it does). */
634 fprintf_filtered (stream
, " : %d",
635 TYPE_FIELD_BITSIZE (type
, i
));
637 fprintf_filtered (stream
, ";\n");
640 /* If there are both fields and methods, put a space between. */
641 len
= TYPE_NFN_FIELDS (type
);
642 if (len
&& section_type
!= s_none
)
643 fprintf_filtered (stream
, "\n");
645 /* Object pascal: print out the methods. */
647 for (i
= 0; i
< len
; i
++)
649 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, i
);
650 int j
, len2
= TYPE_FN_FIELDLIST_LENGTH (type
, i
);
651 const char *method_name
= TYPE_FN_FIELDLIST_NAME (type
, i
);
653 /* this is GNU C++ specific
654 how can we know constructor/destructor?
655 It might work for GNU pascal. */
656 for (j
= 0; j
< len2
; j
++)
658 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, j
);
660 int is_constructor
= (startswith (physname
, "__ct__"));
661 int is_destructor
= (startswith (physname
, "__dt__"));
664 if (TYPE_FN_FIELD_PROTECTED (f
, j
))
666 if (section_type
!= s_protected
)
668 section_type
= s_protected
;
669 fprintfi_filtered (level
+ 2, stream
,
673 else if (TYPE_FN_FIELD_PRIVATE (f
, j
))
675 if (section_type
!= s_private
)
677 section_type
= s_private
;
678 fprintfi_filtered (level
+ 2, stream
, "private\n");
683 if (section_type
!= s_public
)
685 section_type
= s_public
;
686 fprintfi_filtered (level
+ 2, stream
, "public\n");
690 print_spaces_filtered (level
+ 4, stream
);
691 if (TYPE_FN_FIELD_STATIC_P (f
, j
))
692 fprintf_filtered (stream
, "static ");
693 if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f
, j
)) == 0)
695 /* Keep GDB from crashing here. */
696 fprintf_filtered (stream
, "<undefined type> %s;\n",
697 TYPE_FN_FIELD_PHYSNAME (f
, j
));
703 fprintf_filtered (stream
, "constructor ");
705 else if (is_destructor
)
707 fprintf_filtered (stream
, "destructor ");
709 else if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f
, j
)) != 0
710 && TYPE_CODE (TYPE_TARGET_TYPE (
711 TYPE_FN_FIELD_TYPE (f
, j
))) != TYPE_CODE_VOID
)
713 fprintf_filtered (stream
, "function ");
717 fprintf_filtered (stream
, "procedure ");
719 /* This does not work, no idea why !! */
721 pascal_type_print_method_args (physname
,
725 if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f
, j
)) != 0
726 && TYPE_CODE (TYPE_TARGET_TYPE (
727 TYPE_FN_FIELD_TYPE (f
, j
))) != TYPE_CODE_VOID
)
729 fputs_filtered (" : ", stream
);
730 type_print (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f
, j
)),
733 if (TYPE_FN_FIELD_VIRTUAL_P (f
, j
))
734 fprintf_filtered (stream
, "; virtual");
736 fprintf_filtered (stream
, ";\n");
739 fprintfi_filtered (level
, stream
, "end");
744 if (TYPE_NAME (type
) != NULL
)
746 fputs_filtered (TYPE_NAME (type
), stream
);
748 fputs_filtered (" ", stream
);
750 /* enum is just defined by
751 type enume_name = (enum_member1,enum_member2,...) */
752 fprintf_filtered (stream
, " = ");
756 /* If we just printed a tag name, no need to print anything else. */
757 if (TYPE_NAME (type
) == NULL
)
758 fprintf_filtered (stream
, "(...)");
760 else if (show
> 0 || TYPE_NAME (type
) == NULL
)
762 fprintf_filtered (stream
, "(");
763 len
= TYPE_NFIELDS (type
);
765 for (i
= 0; i
< len
; i
++)
769 fprintf_filtered (stream
, ", ");
771 fputs_filtered (TYPE_FIELD_NAME (type
, i
), stream
);
772 if (lastval
!= TYPE_FIELD_ENUMVAL (type
, i
))
774 fprintf_filtered (stream
,
776 plongest (TYPE_FIELD_ENUMVAL (type
, i
)));
777 lastval
= TYPE_FIELD_ENUMVAL (type
, i
);
781 fprintf_filtered (stream
, ")");
786 fprintf_filtered (stream
, "void");
789 case TYPE_CODE_UNDEF
:
790 fprintf_filtered (stream
, "record <unknown>");
793 case TYPE_CODE_ERROR
:
794 fprintf_filtered (stream
, "%s", TYPE_ERROR_NAME (type
));
797 /* this probably does not work for enums. */
798 case TYPE_CODE_RANGE
:
800 struct type
*target
= TYPE_TARGET_TYPE (type
);
802 print_type_scalar (target
, TYPE_LOW_BOUND (type
), stream
);
803 fputs_filtered ("..", stream
);
804 print_type_scalar (target
, TYPE_HIGH_BOUND (type
), stream
);
809 fputs_filtered ("set of ", stream
);
810 pascal_print_type (TYPE_INDEX_TYPE (type
), "", stream
,
811 show
- 1, level
, flags
);
814 case TYPE_CODE_STRING
:
815 fputs_filtered ("String", stream
);
819 /* Handle types not explicitly handled by the other cases,
820 such as fundamental types. For these, just print whatever
821 the type name is, as recorded in the type itself. If there
822 is no type name, then complain. */
823 if (TYPE_NAME (type
) != NULL
)
825 fputs_filtered (TYPE_NAME (type
), stream
);
829 /* At least for dump_symtab, it is important that this not be
831 fprintf_styled (stream
, metadata_style
.style (),
832 "<invalid unnamed pascal type code %d>",