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/>. */
25 /* Standard C includes. */
28 /* Local non-gdb includes. */
31 #include "cp-support.h"
32 #include "expression.h"
37 #include "parser-defs.h"
39 #include "target-float.h"
46 static void f_printchar (int c, struct type *type, struct ui_file * stream);
47 static void f_emit_char (int c, struct type *type,
48 struct ui_file * stream, int quoter);
50 /* Return the encoding that should be used for the character type
54 f_get_encoding (struct type *type)
58 switch (TYPE_LENGTH (type))
61 encoding = target_charset (get_type_arch (type));
64 if (gdbarch_byte_order (get_type_arch (type)) == BFD_ENDIAN_BIG)
65 encoding = "UTF-32BE";
67 encoding = "UTF-32LE";
71 error (_("unrecognized character type"));
77 /* Print the character C on STREAM as part of the contents of a literal
78 string whose delimiter is QUOTER. Note that that format for printing
79 characters and strings is language specific.
80 FIXME: This is a copy of the same function from c-exp.y. It should
81 be replaced with a true F77 version. */
84 f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
86 const char *encoding = f_get_encoding (type);
88 generic_emit_char (c, type, stream, quoter, encoding);
91 /* Implementation of la_printchar. */
94 f_printchar (int c, struct type *type, struct ui_file *stream)
96 fputs_filtered ("'", stream);
97 LA_EMIT_CHAR (c, type, stream, '\'');
98 fputs_filtered ("'", stream);
101 /* Print the character string STRING, printing at most LENGTH characters.
102 Printing stops early if the number hits print_max; repeat counts
103 are printed as appropriate. Print ellipses at the end if we
104 had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
105 FIXME: This is a copy of the same function from c-exp.y. It should
106 be replaced with a true F77 version. */
109 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
110 unsigned int length, const char *encoding, int force_ellipses,
111 const struct value_print_options *options)
113 const char *type_encoding = f_get_encoding (type);
115 if (TYPE_LENGTH (type) == 4)
116 fputs_filtered ("4_", stream);
118 if (!encoding || !*encoding)
119 encoding = type_encoding;
121 generic_printstr (stream, type, string, length, encoding,
122 force_ellipses, '\'', 0, options);
126 /* Table of operators and their precedences for printing expressions. */
128 static const struct op_print f_op_print_tab[] =
130 {"+", BINOP_ADD, PREC_ADD, 0},
131 {"+", UNOP_PLUS, PREC_PREFIX, 0},
132 {"-", BINOP_SUB, PREC_ADD, 0},
133 {"-", UNOP_NEG, PREC_PREFIX, 0},
134 {"*", BINOP_MUL, PREC_MUL, 0},
135 {"/", BINOP_DIV, PREC_MUL, 0},
136 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
137 {"MOD", BINOP_REM, PREC_MUL, 0},
138 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
139 {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
140 {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
141 {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
142 {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
143 {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
144 {".LE.", BINOP_LEQ, PREC_ORDER, 0},
145 {".GE.", BINOP_GEQ, PREC_ORDER, 0},
146 {".GT.", BINOP_GTR, PREC_ORDER, 0},
147 {".LT.", BINOP_LESS, PREC_ORDER, 0},
148 {"**", UNOP_IND, PREC_PREFIX, 0},
149 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
150 {NULL, OP_NULL, PREC_REPEAT, 0}
153 enum f_primitive_types {
154 f_primitive_type_character,
155 f_primitive_type_logical,
156 f_primitive_type_logical_s1,
157 f_primitive_type_logical_s2,
158 f_primitive_type_logical_s8,
159 f_primitive_type_integer,
160 f_primitive_type_integer_s2,
161 f_primitive_type_real,
162 f_primitive_type_real_s8,
163 f_primitive_type_real_s16,
164 f_primitive_type_complex_s8,
165 f_primitive_type_complex_s16,
166 f_primitive_type_void,
171 f_language_arch_info (struct gdbarch *gdbarch,
172 struct language_arch_info *lai)
174 const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
176 lai->string_char_type = builtin->builtin_character;
177 lai->primitive_type_vector
178 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
181 lai->primitive_type_vector [f_primitive_type_character]
182 = builtin->builtin_character;
183 lai->primitive_type_vector [f_primitive_type_logical]
184 = builtin->builtin_logical;
185 lai->primitive_type_vector [f_primitive_type_logical_s1]
186 = builtin->builtin_logical_s1;
187 lai->primitive_type_vector [f_primitive_type_logical_s2]
188 = builtin->builtin_logical_s2;
189 lai->primitive_type_vector [f_primitive_type_logical_s8]
190 = builtin->builtin_logical_s8;
191 lai->primitive_type_vector [f_primitive_type_real]
192 = builtin->builtin_real;
193 lai->primitive_type_vector [f_primitive_type_real_s8]
194 = builtin->builtin_real_s8;
195 lai->primitive_type_vector [f_primitive_type_real_s16]
196 = builtin->builtin_real_s16;
197 lai->primitive_type_vector [f_primitive_type_complex_s8]
198 = builtin->builtin_complex_s8;
199 lai->primitive_type_vector [f_primitive_type_complex_s16]
200 = builtin->builtin_complex_s16;
201 lai->primitive_type_vector [f_primitive_type_void]
202 = builtin->builtin_void;
204 lai->bool_type_symbol = "logical";
205 lai->bool_type_default = builtin->builtin_logical_s2;
208 /* Remove the modules separator :: from the default break list. */
211 f_word_break_characters (void)
219 retval = xstrdup (default_word_break_characters ());
220 s = strchr (retval, ':');
223 char *last_char = &s[strlen (s) - 1];
232 /* Consider the modules separator :: as a valid symbol name character
236 f_collect_symbol_completion_matches (completion_tracker &tracker,
237 complete_symbol_mode mode,
238 symbol_name_match_type compare_name,
239 const char *text, const char *word,
242 default_collect_symbol_completion_matches_break_on (tracker, mode,
244 text, word, ":", code);
247 /* Special expression evaluation cases for Fortran. */
249 evaluate_subexp_f (struct type *expect_type, struct expression *exp,
250 int *pos, enum noside noside)
252 struct value *arg1 = NULL;
259 op = exp->elts[pc].opcode;
265 return evaluate_subexp_standard (expect_type, exp, pos, noside);
268 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
269 if (noside == EVAL_SKIP)
270 return eval_skip_value (exp);
271 type = value_type (arg1);
272 switch (TYPE_CODE (type))
277 = fabs (target_float_to_host_double (value_contents (arg1),
279 return value_from_host_double (type, d);
283 LONGEST l = value_as_long (arg1);
285 return value_from_longest (type, l);
288 error (_("ABS of type %s not supported"), TYPE_SAFE_NAME (type));
291 arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
292 type = value_type (arg1);
294 switch (TYPE_CODE (type))
296 case TYPE_CODE_STRUCT:
297 case TYPE_CODE_UNION:
298 case TYPE_CODE_MODULE:
300 error (_("argument to kind must be an intrinsic type"));
303 if (!TYPE_TARGET_TYPE (type))
304 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
306 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
307 TYPE_LENGTH (TYPE_TARGET_TYPE(type)));
310 /* Should be unreachable. */
314 static const char *f_extensions[] =
316 ".f", ".F", ".for", ".FOR", ".ftn", ".FTN", ".fpp", ".FPP",
317 ".f90", ".F90", ".f95", ".F95", ".f03", ".F03", ".f08", ".F08",
321 /* Expression processing for Fortran. */
322 static const struct exp_descriptor exp_descriptor_f =
324 print_subexp_standard,
325 operator_length_standard,
326 operator_check_standard,
328 dump_subexp_body_standard,
332 extern const struct language_defn f_language_defn =
343 f_parse, /* parser */
345 f_printchar, /* Print character constant */
346 f_printstr, /* function to print string constant */
347 f_emit_char, /* Function to print a single character */
348 f_print_type, /* Print a type using appropriate syntax */
349 default_print_typedef, /* Print a typedef using appropriate syntax */
350 f_val_print, /* Print a value using appropriate syntax */
351 c_value_print, /* FIXME */
352 default_read_var_value, /* la_read_var_value */
353 NULL, /* Language specific skip_trampoline */
354 NULL, /* name_of_this */
355 false, /* la_store_sym_names_in_linkage_form_p */
356 cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
357 basic_lookup_transparent_type,/* lookup_transparent_type */
359 /* We could support demangling here to provide module namespaces
360 also for inferiors with only minimal symbol table (ELF symbols).
361 Just the mangling standard is not standardized across compilers
362 and there is no DW_AT_producer available for inferiors with only
363 the ELF symbols to check the mangling kind. */
364 NULL, /* Language specific symbol demangler */
366 NULL, /* Language specific
367 class_name_from_physname */
368 f_op_print_tab, /* expression operators for printing */
369 0, /* arrays are first-class (not c-style) */
370 1, /* String lower bound */
371 f_word_break_characters,
372 f_collect_symbol_completion_matches,
373 f_language_arch_info,
374 default_print_array_index,
375 default_pass_by_reference,
377 c_watch_location_expression,
378 NULL, /* la_get_symbol_name_matcher */
379 iterate_over_symbols,
380 default_search_name_hash,
388 build_fortran_types (struct gdbarch *gdbarch)
390 struct builtin_f_type *builtin_f_type
391 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
393 builtin_f_type->builtin_void
394 = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, "VOID");
396 builtin_f_type->builtin_character
397 = arch_type (gdbarch, TYPE_CODE_CHAR, TARGET_CHAR_BIT, "character");
399 builtin_f_type->builtin_logical_s1
400 = arch_boolean_type (gdbarch, TARGET_CHAR_BIT, 1, "logical*1");
402 builtin_f_type->builtin_integer_s2
403 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), 0,
406 builtin_f_type->builtin_integer_s8
407 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch), 0,
410 builtin_f_type->builtin_logical_s2
411 = arch_boolean_type (gdbarch, gdbarch_short_bit (gdbarch), 1,
414 builtin_f_type->builtin_logical_s8
415 = arch_boolean_type (gdbarch, gdbarch_long_long_bit (gdbarch), 1,
418 builtin_f_type->builtin_integer
419 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0,
422 builtin_f_type->builtin_logical
423 = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1,
426 builtin_f_type->builtin_real
427 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
428 "real", gdbarch_float_format (gdbarch));
429 builtin_f_type->builtin_real_s8
430 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
431 "real*8", gdbarch_double_format (gdbarch));
432 builtin_f_type->builtin_real_s16
433 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
434 "real*16", gdbarch_long_double_format (gdbarch));
436 builtin_f_type->builtin_complex_s8
437 = arch_complex_type (gdbarch, "complex*8",
438 builtin_f_type->builtin_real);
439 builtin_f_type->builtin_complex_s16
440 = arch_complex_type (gdbarch, "complex*16",
441 builtin_f_type->builtin_real_s8);
442 builtin_f_type->builtin_complex_s32
443 = arch_complex_type (gdbarch, "complex*32",
444 builtin_f_type->builtin_real_s16);
446 return builtin_f_type;
449 static struct gdbarch_data *f_type_data;
451 const struct builtin_f_type *
452 builtin_f_type (struct gdbarch *gdbarch)
454 return (const struct builtin_f_type *) gdbarch_data (gdbarch, f_type_data);
458 _initialize_f_language (void)
460 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
466 fortran_argument_convert (struct value *value, bool is_artificial)
470 /* If the value is not in the inferior e.g. registers values,
471 convenience variables and user input. */
472 if (VALUE_LVAL (value) != lval_memory)
474 struct type *type = value_type (value);
475 const int length = TYPE_LENGTH (type);
477 = value_as_long (value_allocate_space_in_inferior (length));
478 write_memory (addr, value_contents (value), length);
480 = value_from_contents_and_address (type, value_contents (value),
482 return value_addr (val);
485 return value_addr (value); /* Program variables, e.g. arrays. */
493 fortran_preserve_arg_pointer (struct value *arg, struct type *type)
495 if (TYPE_CODE (value_type (arg)) == TYPE_CODE_PTR)
496 return value_type (arg);