1 /* Fortran language support routines for GDB, the GNU debugger.
3 Copyright (C) 1993-2019 Free Software Foundation, Inc.
5 Contributed by Motorola. Adapted from the C parser by Farooq Butt
6 (fmbutt@engage.sps.mot.com).
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "expression.h"
27 #include "parser-defs.h"
34 #include "cp-support.h"
37 #include "target-float.h"
43 static void f_printchar (int c, struct type *type, struct ui_file * stream);
44 static void f_emit_char (int c, struct type *type,
45 struct ui_file * stream, int quoter);
47 /* Return the encoding that should be used for the character type
51 f_get_encoding (struct type *type)
55 switch (TYPE_LENGTH (type))
58 encoding = target_charset (get_type_arch (type));
61 if (gdbarch_byte_order (get_type_arch (type)) == BFD_ENDIAN_BIG)
62 encoding = "UTF-32BE";
64 encoding = "UTF-32LE";
68 error (_("unrecognized character type"));
74 /* Print the character C on STREAM as part of the contents of a literal
75 string whose delimiter is QUOTER. Note that that format for printing
76 characters and strings is language specific.
77 FIXME: This is a copy of the same function from c-exp.y. It should
78 be replaced with a true F77 version. */
81 f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
83 const char *encoding = f_get_encoding (type);
85 generic_emit_char (c, type, stream, quoter, encoding);
88 /* Implementation of la_printchar. */
91 f_printchar (int c, struct type *type, struct ui_file *stream)
93 fputs_filtered ("'", stream);
94 LA_EMIT_CHAR (c, type, stream, '\'');
95 fputs_filtered ("'", stream);
98 /* Print the character string STRING, printing at most LENGTH characters.
99 Printing stops early if the number hits print_max; repeat counts
100 are printed as appropriate. Print ellipses at the end if we
101 had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
102 FIXME: This is a copy of the same function from c-exp.y. It should
103 be replaced with a true F77 version. */
106 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
107 unsigned int length, const char *encoding, int force_ellipses,
108 const struct value_print_options *options)
110 const char *type_encoding = f_get_encoding (type);
112 if (TYPE_LENGTH (type) == 4)
113 fputs_filtered ("4_", stream);
115 if (!encoding || !*encoding)
116 encoding = type_encoding;
118 generic_printstr (stream, type, string, length, encoding,
119 force_ellipses, '\'', 0, options);
123 /* Table of operators and their precedences for printing expressions. */
125 static const struct op_print f_op_print_tab[] =
127 {"+", BINOP_ADD, PREC_ADD, 0},
128 {"+", UNOP_PLUS, PREC_PREFIX, 0},
129 {"-", BINOP_SUB, PREC_ADD, 0},
130 {"-", UNOP_NEG, PREC_PREFIX, 0},
131 {"*", BINOP_MUL, PREC_MUL, 0},
132 {"/", BINOP_DIV, PREC_MUL, 0},
133 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
134 {"MOD", BINOP_REM, PREC_MUL, 0},
135 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
136 {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
137 {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
138 {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
139 {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
140 {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
141 {".LE.", BINOP_LEQ, PREC_ORDER, 0},
142 {".GE.", BINOP_GEQ, PREC_ORDER, 0},
143 {".GT.", BINOP_GTR, PREC_ORDER, 0},
144 {".LT.", BINOP_LESS, PREC_ORDER, 0},
145 {"**", UNOP_IND, PREC_PREFIX, 0},
146 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
147 {NULL, OP_NULL, PREC_REPEAT, 0}
150 enum f_primitive_types {
151 f_primitive_type_character,
152 f_primitive_type_logical,
153 f_primitive_type_logical_s1,
154 f_primitive_type_logical_s2,
155 f_primitive_type_logical_s8,
156 f_primitive_type_integer,
157 f_primitive_type_integer_s2,
158 f_primitive_type_real,
159 f_primitive_type_real_s8,
160 f_primitive_type_real_s16,
161 f_primitive_type_complex_s8,
162 f_primitive_type_complex_s16,
163 f_primitive_type_void,
168 f_language_arch_info (struct gdbarch *gdbarch,
169 struct language_arch_info *lai)
171 const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
173 lai->string_char_type = builtin->builtin_character;
174 lai->primitive_type_vector
175 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
178 lai->primitive_type_vector [f_primitive_type_character]
179 = builtin->builtin_character;
180 lai->primitive_type_vector [f_primitive_type_logical]
181 = builtin->builtin_logical;
182 lai->primitive_type_vector [f_primitive_type_logical_s1]
183 = builtin->builtin_logical_s1;
184 lai->primitive_type_vector [f_primitive_type_logical_s2]
185 = builtin->builtin_logical_s2;
186 lai->primitive_type_vector [f_primitive_type_logical_s8]
187 = builtin->builtin_logical_s8;
188 lai->primitive_type_vector [f_primitive_type_real]
189 = builtin->builtin_real;
190 lai->primitive_type_vector [f_primitive_type_real_s8]
191 = builtin->builtin_real_s8;
192 lai->primitive_type_vector [f_primitive_type_real_s16]
193 = builtin->builtin_real_s16;
194 lai->primitive_type_vector [f_primitive_type_complex_s8]
195 = builtin->builtin_complex_s8;
196 lai->primitive_type_vector [f_primitive_type_complex_s16]
197 = builtin->builtin_complex_s16;
198 lai->primitive_type_vector [f_primitive_type_void]
199 = builtin->builtin_void;
201 lai->bool_type_symbol = "logical";
202 lai->bool_type_default = builtin->builtin_logical_s2;
205 /* Remove the modules separator :: from the default break list. */
208 f_word_break_characters (void)
216 retval = xstrdup (default_word_break_characters ());
217 s = strchr (retval, ':');
220 char *last_char = &s[strlen (s) - 1];
229 /* Consider the modules separator :: as a valid symbol name character
233 f_collect_symbol_completion_matches (completion_tracker &tracker,
234 complete_symbol_mode mode,
235 symbol_name_match_type compare_name,
236 const char *text, const char *word,
239 default_collect_symbol_completion_matches_break_on (tracker, mode,
241 text, word, ":", code);
244 /* Special expression evaluation cases for Fortran. */
246 evaluate_subexp_f (struct type *expect_type, struct expression *exp,
247 int *pos, enum noside noside)
249 struct value *arg1 = NULL, *arg2 = NULL;
256 op = exp->elts[pc].opcode;
262 return evaluate_subexp_standard (expect_type, exp, pos, noside);
265 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
266 if (noside == EVAL_SKIP)
267 return eval_skip_value (exp);
268 type = value_type (arg1);
269 switch (TYPE_CODE (type))
274 = fabs (target_float_to_host_double (value_contents (arg1),
276 return value_from_host_double (type, d);
280 LONGEST l = value_as_long (arg1);
282 return value_from_longest (type, l);
285 error (_("ABS of type %s not supported"), TYPE_SAFE_NAME (type));
288 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
289 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
290 if (noside == EVAL_SKIP)
291 return eval_skip_value (exp);
292 type = value_type (arg1);
293 if (TYPE_CODE (type) != TYPE_CODE (value_type (arg2)))
294 error (_("non-matching types for parameters to MOD ()"));
295 switch (TYPE_CODE (type))
300 = target_float_to_host_double (value_contents (arg1),
303 = target_float_to_host_double (value_contents (arg2),
305 double d3 = fmod (d1, d2);
306 return value_from_host_double (type, d3);
310 LONGEST v1 = value_as_long (arg1);
311 LONGEST v2 = value_as_long (arg2);
313 error (_("calling MOD (N, 0) is undefined"));
314 LONGEST v3 = v1 - (v1 / v2) * v2;
315 return value_from_longest (value_type (arg1), v3);
318 error (_("MOD of type %s not supported"), TYPE_SAFE_NAME (type));
320 case UNOP_FORTRAN_CEILING:
322 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
323 if (noside == EVAL_SKIP)
324 return eval_skip_value (exp);
325 type = value_type (arg1);
326 if (TYPE_CODE (type) != TYPE_CODE_FLT)
327 error (_("argument to CEILING must be of type float"));
329 = target_float_to_host_double (value_contents (arg1),
332 return value_from_host_double (type, val);
335 case UNOP_FORTRAN_FLOOR:
337 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
338 if (noside == EVAL_SKIP)
339 return eval_skip_value (exp);
340 type = value_type (arg1);
341 if (TYPE_CODE (type) != TYPE_CODE_FLT)
342 error (_("argument to FLOOR must be of type float"));
344 = target_float_to_host_double (value_contents (arg1),
347 return value_from_host_double (type, val);
350 case BINOP_FORTRAN_MODULO:
352 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
353 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
354 if (noside == EVAL_SKIP)
355 return eval_skip_value (exp);
356 type = value_type (arg1);
357 if (TYPE_CODE (type) != TYPE_CODE (value_type (arg2)))
358 error (_("non-matching types for parameters to MODULO ()"));
359 /* MODULO(A, P) = A - FLOOR (A / P) * P */
360 switch (TYPE_CODE (type))
364 LONGEST a = value_as_long (arg1);
365 LONGEST p = value_as_long (arg2);
366 LONGEST result = a - (a / p) * p;
367 if (result != 0 && (a < 0) != (p < 0))
369 return value_from_longest (value_type (arg1), result);
374 = target_float_to_host_double (value_contents (arg1),
377 = target_float_to_host_double (value_contents (arg2),
379 double result = fmod (a, p);
380 if (result != 0 && (a < 0.0) != (p < 0.0))
382 return value_from_host_double (type, result);
385 error (_("MODULO of type %s not supported"), TYPE_SAFE_NAME (type));
388 case BINOP_FORTRAN_CMPLX:
389 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
390 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
391 if (noside == EVAL_SKIP)
392 return eval_skip_value (exp);
393 type = builtin_f_type(exp->gdbarch)->builtin_complex_s16;
394 return value_literal_complex (arg1, arg2, type);
396 case UNOP_FORTRAN_KIND:
397 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
398 type = value_type (arg1);
400 switch (TYPE_CODE (type))
402 case TYPE_CODE_STRUCT:
403 case TYPE_CODE_UNION:
404 case TYPE_CODE_MODULE:
406 error (_("argument to kind must be an intrinsic type"));
409 if (!TYPE_TARGET_TYPE (type))
410 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
412 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
413 TYPE_LENGTH (TYPE_TARGET_TYPE(type)));
416 /* Should be unreachable. */
420 /* Return true if TYPE is a string. */
423 f_is_string_type_p (struct type *type)
425 type = check_typedef (type);
426 return (TYPE_CODE (type) == TYPE_CODE_STRING
427 || (TYPE_CODE (type) == TYPE_CODE_ARRAY
428 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CHAR));
431 /* Special expression lengths for Fortran. */
434 operator_length_f (const struct expression *exp, int pc, int *oplenp,
440 switch (exp->elts[pc - 1].opcode)
443 operator_length_standard (exp, pc, oplenp, argsp);
446 case UNOP_FORTRAN_KIND:
447 case UNOP_FORTRAN_FLOOR:
448 case UNOP_FORTRAN_CEILING:
453 case BINOP_FORTRAN_CMPLX:
454 case BINOP_FORTRAN_MODULO:
464 /* Helper for PRINT_SUBEXP_F. Arguments are as for PRINT_SUBEXP_F, except
465 the extra argument NAME which is the text that should be printed as the
466 name of this operation. */
469 print_unop_subexp_f (struct expression *exp, int *pos,
470 struct ui_file *stream, enum precedence prec,
474 fprintf_filtered (stream, "%s(", name);
475 print_subexp (exp, pos, stream, PREC_SUFFIX);
476 fputs_filtered (")", stream);
479 /* Helper for PRINT_SUBEXP_F. Arguments are as for PRINT_SUBEXP_F, except
480 the extra argument NAME which is the text that should be printed as the
481 name of this operation. */
484 print_binop_subexp_f (struct expression *exp, int *pos,
485 struct ui_file *stream, enum precedence prec,
489 fprintf_filtered (stream, "%s(", name);
490 print_subexp (exp, pos, stream, PREC_SUFFIX);
491 fputs_filtered (",", stream);
492 print_subexp (exp, pos, stream, PREC_SUFFIX);
493 fputs_filtered (")", stream);
496 /* Special expression printing for Fortran. */
499 print_subexp_f (struct expression *exp, int *pos,
500 struct ui_file *stream, enum precedence prec)
503 enum exp_opcode op = exp->elts[pc].opcode;
508 print_subexp_standard (exp, pos, stream, prec);
511 case UNOP_FORTRAN_KIND:
512 print_unop_subexp_f (exp, pos, stream, prec, "KIND");
515 case UNOP_FORTRAN_FLOOR:
516 print_unop_subexp_f (exp, pos, stream, prec, "FLOOR");
519 case UNOP_FORTRAN_CEILING:
520 print_unop_subexp_f (exp, pos, stream, prec, "CEILING");
523 case BINOP_FORTRAN_CMPLX:
524 print_binop_subexp_f (exp, pos, stream, prec, "CMPLX");
527 case BINOP_FORTRAN_MODULO:
528 print_binop_subexp_f (exp, pos, stream, prec, "MODULO");
533 /* Special expression names for Fortran. */
536 op_name_f (enum exp_opcode opcode)
541 return op_name_standard (opcode);
546 #include "fortran-operator.def"
551 /* Special expression dumping for Fortran. */
554 dump_subexp_body_f (struct expression *exp,
555 struct ui_file *stream, int elt)
557 int opcode = exp->elts[elt].opcode;
563 return dump_subexp_body_standard (exp, stream, elt);
565 case UNOP_FORTRAN_KIND:
566 case UNOP_FORTRAN_FLOOR:
567 case UNOP_FORTRAN_CEILING:
568 case BINOP_FORTRAN_CMPLX:
569 case BINOP_FORTRAN_MODULO:
570 operator_length_f (exp, (elt + 1), &oplen, &nargs);
575 for (i = 0; i < nargs; i += 1)
576 elt = dump_subexp (exp, stream, elt);
581 /* Special expression checking for Fortran. */
584 operator_check_f (struct expression *exp, int pos,
585 int (*objfile_func) (struct objfile *objfile,
589 const union exp_element *const elts = exp->elts;
591 switch (elts[pos].opcode)
593 case UNOP_FORTRAN_KIND:
594 case UNOP_FORTRAN_FLOOR:
595 case UNOP_FORTRAN_CEILING:
596 case BINOP_FORTRAN_CMPLX:
597 case BINOP_FORTRAN_MODULO:
598 /* Any references to objfiles are held in the arguments to this
599 expression, not within the expression itself, so no additional
600 checking is required here, the outer expression iteration code
601 will take care of checking each argument. */
605 return operator_check_standard (exp, pos, objfile_func, data);
611 static const char *f_extensions[] =
613 ".f", ".F", ".for", ".FOR", ".ftn", ".FTN", ".fpp", ".FPP",
614 ".f90", ".F90", ".f95", ".F95", ".f03", ".F03", ".f08", ".F08",
618 /* Expression processing for Fortran. */
619 static const struct exp_descriptor exp_descriptor_f =
629 extern const struct language_defn f_language_defn =
640 f_parse, /* parser */
642 f_printchar, /* Print character constant */
643 f_printstr, /* function to print string constant */
644 f_emit_char, /* Function to print a single character */
645 f_print_type, /* Print a type using appropriate syntax */
646 default_print_typedef, /* Print a typedef using appropriate syntax */
647 f_val_print, /* Print a value using appropriate syntax */
648 c_value_print, /* FIXME */
649 default_read_var_value, /* la_read_var_value */
650 NULL, /* Language specific skip_trampoline */
651 NULL, /* name_of_this */
652 false, /* la_store_sym_names_in_linkage_form_p */
653 cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
654 basic_lookup_transparent_type,/* lookup_transparent_type */
656 /* We could support demangling here to provide module namespaces
657 also for inferiors with only minimal symbol table (ELF symbols).
658 Just the mangling standard is not standardized across compilers
659 and there is no DW_AT_producer available for inferiors with only
660 the ELF symbols to check the mangling kind. */
661 NULL, /* Language specific symbol demangler */
663 NULL, /* Language specific
664 class_name_from_physname */
665 f_op_print_tab, /* expression operators for printing */
666 0, /* arrays are first-class (not c-style) */
667 1, /* String lower bound */
668 f_word_break_characters,
669 f_collect_symbol_completion_matches,
670 f_language_arch_info,
671 default_print_array_index,
672 default_pass_by_reference,
674 c_watch_location_expression,
675 NULL, /* la_get_symbol_name_matcher */
676 iterate_over_symbols,
677 default_search_name_hash,
682 "(...)" /* la_struct_too_deep_ellipsis */
686 build_fortran_types (struct gdbarch *gdbarch)
688 struct builtin_f_type *builtin_f_type
689 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
691 builtin_f_type->builtin_void
692 = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, "void");
694 builtin_f_type->builtin_character
695 = arch_type (gdbarch, TYPE_CODE_CHAR, TARGET_CHAR_BIT, "character");
697 builtin_f_type->builtin_logical_s1
698 = arch_boolean_type (gdbarch, TARGET_CHAR_BIT, 1, "logical*1");
700 builtin_f_type->builtin_integer_s2
701 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), 0,
704 builtin_f_type->builtin_integer_s8
705 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch), 0,
708 builtin_f_type->builtin_logical_s2
709 = arch_boolean_type (gdbarch, gdbarch_short_bit (gdbarch), 1,
712 builtin_f_type->builtin_logical_s8
713 = arch_boolean_type (gdbarch, gdbarch_long_long_bit (gdbarch), 1,
716 builtin_f_type->builtin_integer
717 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0,
720 builtin_f_type->builtin_logical
721 = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1,
724 builtin_f_type->builtin_real
725 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
726 "real", gdbarch_float_format (gdbarch));
727 builtin_f_type->builtin_real_s8
728 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
729 "real*8", gdbarch_double_format (gdbarch));
730 auto fmt = gdbarch_floatformat_for_type (gdbarch, "real(kind=16)", 128);
732 builtin_f_type->builtin_real_s16
733 = arch_float_type (gdbarch, 128, "real*16", fmt);
734 else if (gdbarch_long_double_bit (gdbarch) == 128)
735 builtin_f_type->builtin_real_s16
736 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
737 "real*16", gdbarch_long_double_format (gdbarch));
739 builtin_f_type->builtin_real_s16
740 = arch_type (gdbarch, TYPE_CODE_ERROR, 128, "real*16");
742 builtin_f_type->builtin_complex_s8
743 = arch_complex_type (gdbarch, "complex*8",
744 builtin_f_type->builtin_real);
745 builtin_f_type->builtin_complex_s16
746 = arch_complex_type (gdbarch, "complex*16",
747 builtin_f_type->builtin_real_s8);
748 builtin_f_type->builtin_complex_s32
749 = arch_complex_type (gdbarch, "complex*32",
750 builtin_f_type->builtin_real_s16);
752 return builtin_f_type;
755 static struct gdbarch_data *f_type_data;
757 const struct builtin_f_type *
758 builtin_f_type (struct gdbarch *gdbarch)
760 return (const struct builtin_f_type *) gdbarch_data (gdbarch, f_type_data);
764 _initialize_f_language (void)
766 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
772 fortran_argument_convert (struct value *value, bool is_artificial)
776 /* If the value is not in the inferior e.g. registers values,
777 convenience variables and user input. */
778 if (VALUE_LVAL (value) != lval_memory)
780 struct type *type = value_type (value);
781 const int length = TYPE_LENGTH (type);
783 = value_as_long (value_allocate_space_in_inferior (length));
784 write_memory (addr, value_contents (value), length);
786 = value_from_contents_and_address (type, value_contents (value),
788 return value_addr (val);
791 return value_addr (value); /* Program variables, e.g. arrays. */
799 fortran_preserve_arg_pointer (struct value *arg, struct type *type)
801 if (TYPE_CODE (value_type (arg)) == TYPE_CODE_PTR)
802 return value_type (arg);