1 /* Fortran language support routines for GDB, the GNU debugger.
3 Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
6 Contributed by Motorola. Adapted from the C parser by Farooq Butt
7 (fmbutt@engage.sps.mot.com).
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "gdb_string.h"
28 #include "expression.h"
29 #include "parser-defs.h"
36 /* Following is dubious stuff that had been in the xcoff reader. */
40 long line_offset; /* Line offset for function */
41 struct saved_fcn *next;
45 struct saved_bf_symnum
47 long symnum_fcn; /* Symnum of function (i.e. .function directive) */
48 long symnum_bf; /* Symnum of .bf for this function */
49 struct saved_bf_symnum *next;
52 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
53 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
57 extern void _initialize_f_language (void);
59 static void clear_function_list (void);
60 static long get_bf_for_fcn (long);
61 static void clear_bf_list (void);
62 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
63 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
64 static void add_common_entry (struct symbol *);
65 static void add_common_block (char *, CORE_ADDR, int, char *);
66 static SAVED_FUNCTION *allocate_saved_function_node (void);
67 static SAVED_BF_PTR allocate_saved_bf_node (void);
68 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
69 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
70 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
73 static void f_printchar (int c, struct type *type, struct ui_file * stream);
74 static void f_emit_char (int c, struct type *type,
75 struct ui_file * stream, int quoter);
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 c &= 0xFF; /* Avoid sign bit follies */
88 if (PRINT_LITERAL_FORM (c))
90 if (c == '\\' || c == quoter)
91 fputs_filtered ("\\", stream);
92 fprintf_filtered (stream, "%c", c);
99 fputs_filtered ("\\n", stream);
102 fputs_filtered ("\\b", stream);
105 fputs_filtered ("\\t", stream);
108 fputs_filtered ("\\f", stream);
111 fputs_filtered ("\\r", stream);
114 fputs_filtered ("\\e", stream);
117 fputs_filtered ("\\a", stream);
120 fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
126 /* FIXME: This is a copy of the same function from c-exp.y. It should
127 be replaced with a true F77version. */
130 f_printchar (int c, struct type *type, struct ui_file *stream)
132 fputs_filtered ("'", stream);
133 LA_EMIT_CHAR (c, type, stream, '\'');
134 fputs_filtered ("'", stream);
137 /* Print the character string STRING, printing at most LENGTH characters.
138 Printing stops early if the number hits print_max; repeat counts
139 are printed as appropriate. Print ellipses at the end if we
140 had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
141 FIXME: This is a copy of the same function from c-exp.y. It should
142 be replaced with a true F77 version. */
145 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
146 unsigned int length, int force_ellipses,
147 const struct value_print_options *options)
150 unsigned int things_printed = 0;
153 int width = TYPE_LENGTH (type);
157 fputs_filtered ("''", gdb_stdout);
161 for (i = 0; i < length && things_printed < options->print_max; ++i)
163 /* Position of the character we are examining
164 to see whether it is repeated. */
166 /* Number of repetitions we have detected so far. */
173 fputs_filtered (", ", stream);
179 while (rep1 < length && string[rep1] == string[i])
185 if (reps > options->repeat_count_threshold)
189 if (options->inspect_it)
190 fputs_filtered ("\\', ", stream);
192 fputs_filtered ("', ", stream);
195 f_printchar (string[i], type, stream);
196 fprintf_filtered (stream, " <repeats %u times>", reps);
198 things_printed += options->repeat_count_threshold;
205 if (options->inspect_it)
206 fputs_filtered ("\\'", stream);
208 fputs_filtered ("'", stream);
211 LA_EMIT_CHAR (string[i], type, stream, '"');
216 /* Terminate the quotes if necessary. */
219 if (options->inspect_it)
220 fputs_filtered ("\\'", stream);
222 fputs_filtered ("'", stream);
225 if (force_ellipses || i < length)
226 fputs_filtered ("...", stream);
230 /* Table of operators and their precedences for printing expressions. */
232 static const struct op_print f_op_print_tab[] =
234 {"+", BINOP_ADD, PREC_ADD, 0},
235 {"+", UNOP_PLUS, PREC_PREFIX, 0},
236 {"-", BINOP_SUB, PREC_ADD, 0},
237 {"-", UNOP_NEG, PREC_PREFIX, 0},
238 {"*", BINOP_MUL, PREC_MUL, 0},
239 {"/", BINOP_DIV, PREC_MUL, 0},
240 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
241 {"MOD", BINOP_REM, PREC_MUL, 0},
242 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
243 {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
244 {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
245 {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
246 {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
247 {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
248 {".LE.", BINOP_LEQ, PREC_ORDER, 0},
249 {".GE.", BINOP_GEQ, PREC_ORDER, 0},
250 {".GT.", BINOP_GTR, PREC_ORDER, 0},
251 {".LT.", BINOP_LESS, PREC_ORDER, 0},
252 {"**", UNOP_IND, PREC_PREFIX, 0},
253 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
257 enum f_primitive_types {
258 f_primitive_type_character,
259 f_primitive_type_logical,
260 f_primitive_type_logical_s1,
261 f_primitive_type_logical_s2,
262 f_primitive_type_integer,
263 f_primitive_type_integer_s2,
264 f_primitive_type_real,
265 f_primitive_type_real_s8,
266 f_primitive_type_real_s16,
267 f_primitive_type_complex_s8,
268 f_primitive_type_complex_s16,
269 f_primitive_type_void,
274 f_language_arch_info (struct gdbarch *gdbarch,
275 struct language_arch_info *lai)
277 const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
279 lai->string_char_type = builtin->builtin_character;
280 lai->primitive_type_vector
281 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
284 lai->primitive_type_vector [f_primitive_type_character]
285 = builtin->builtin_character;
286 lai->primitive_type_vector [f_primitive_type_logical]
287 = builtin->builtin_logical;
288 lai->primitive_type_vector [f_primitive_type_logical_s1]
289 = builtin->builtin_logical_s1;
290 lai->primitive_type_vector [f_primitive_type_logical_s2]
291 = builtin->builtin_logical_s2;
292 lai->primitive_type_vector [f_primitive_type_real]
293 = builtin->builtin_real;
294 lai->primitive_type_vector [f_primitive_type_real_s8]
295 = builtin->builtin_real_s8;
296 lai->primitive_type_vector [f_primitive_type_real_s16]
297 = builtin->builtin_real_s16;
298 lai->primitive_type_vector [f_primitive_type_complex_s8]
299 = builtin->builtin_complex_s8;
300 lai->primitive_type_vector [f_primitive_type_complex_s16]
301 = builtin->builtin_complex_s16;
302 lai->primitive_type_vector [f_primitive_type_void]
303 = builtin->builtin_void;
305 lai->bool_type_symbol = "logical";
306 lai->bool_type_default = builtin->builtin_logical_s2;
309 /* This is declared in c-lang.h but it is silly to import that file for what
310 is already just a hack. */
311 extern int c_value_print (struct value *, struct ui_file *,
312 const struct value_print_options *);
314 const struct language_defn f_language_defn =
323 &exp_descriptor_standard,
324 f_parse, /* parser */
325 f_error, /* parser error function */
327 f_printchar, /* Print character constant */
328 f_printstr, /* function to print string constant */
329 f_emit_char, /* Function to print a single character */
330 f_print_type, /* Print a type using appropriate syntax */
331 default_print_typedef, /* Print a typedef using appropriate syntax */
332 f_val_print, /* Print a value using appropriate syntax */
333 c_value_print, /* FIXME */
334 NULL, /* Language specific skip_trampoline */
335 NULL, /* name_of_this */
336 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
337 basic_lookup_transparent_type,/* lookup_transparent_type */
338 NULL, /* Language specific symbol demangler */
339 NULL, /* Language specific class_name_from_physname */
340 f_op_print_tab, /* expression operators for printing */
341 0, /* arrays are first-class (not c-style) */
342 1, /* String lower bound */
343 default_word_break_characters,
344 default_make_symbol_completion_list,
345 f_language_arch_info,
346 default_print_array_index,
347 default_pass_by_reference,
353 build_fortran_types (struct gdbarch *gdbarch)
355 struct builtin_f_type *builtin_f_type
356 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
358 builtin_f_type->builtin_void =
359 init_type (TYPE_CODE_VOID, 1,
361 "VOID", (struct objfile *) NULL);
363 builtin_f_type->builtin_character =
364 init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
366 "character", (struct objfile *) NULL);
368 builtin_f_type->builtin_logical_s1 =
369 init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
371 "logical*1", (struct objfile *) NULL);
373 builtin_f_type->builtin_integer_s2 =
374 init_type (TYPE_CODE_INT,
375 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
376 0, "integer*2", (struct objfile *) NULL);
378 builtin_f_type->builtin_logical_s2 =
379 init_type (TYPE_CODE_BOOL,
380 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
381 TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
383 builtin_f_type->builtin_integer =
384 init_type (TYPE_CODE_INT,
385 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
386 0, "integer", (struct objfile *) NULL);
388 builtin_f_type->builtin_logical =
389 init_type (TYPE_CODE_BOOL,
390 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
391 TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
393 builtin_f_type->builtin_real =
394 init_float_type (gdbarch_float_bit (gdbarch),
396 builtin_f_type->builtin_real_s8 =
397 init_float_type (gdbarch_double_bit (gdbarch),
399 builtin_f_type->builtin_real_s16 =
400 init_float_type (gdbarch_long_double_bit (gdbarch),
403 builtin_f_type->builtin_complex_s8 =
404 init_complex_type ("complex*8",
405 builtin_f_type->builtin_real);
406 builtin_f_type->builtin_complex_s16 =
407 init_complex_type ("complex*16",
408 builtin_f_type->builtin_real_s8);
409 builtin_f_type->builtin_complex_s32 =
410 init_complex_type ("complex*32",
411 builtin_f_type->builtin_real_s16);
413 return builtin_f_type;
416 static struct gdbarch_data *f_type_data;
418 const struct builtin_f_type *
419 builtin_f_type (struct gdbarch *gdbarch)
421 return gdbarch_data (gdbarch, f_type_data);
425 _initialize_f_language (void)
427 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
429 add_language (&f_language_defn);
434 allocate_saved_bf_node (void)
438 new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
442 static SAVED_FUNCTION *
443 allocate_saved_function_node (void)
447 new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
451 static SAVED_F77_COMMON_PTR
452 allocate_saved_f77_common_node (void)
454 SAVED_F77_COMMON_PTR new;
456 new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
460 static COMMON_ENTRY_PTR
461 allocate_common_entry_node (void)
463 COMMON_ENTRY_PTR new;
465 new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
470 SAVED_F77_COMMON_PTR head_common_list = NULL; /* Ptr to 1st saved COMMON */
471 SAVED_F77_COMMON_PTR tail_common_list = NULL; /* Ptr to last saved COMMON */
472 SAVED_F77_COMMON_PTR current_common = NULL; /* Ptr to current COMMON */
475 static SAVED_BF_PTR saved_bf_list = NULL; /* Ptr to (.bf,function)
477 static SAVED_BF_PTR saved_bf_list_end = NULL; /* Ptr to above list's end */
478 static SAVED_BF_PTR current_head_bf_list = NULL; /* Current head of above list
481 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
484 /* The following function simply enters a given common block onto
485 the global common block chain */
488 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
490 SAVED_F77_COMMON_PTR tmp;
491 char *c, *local_copy_func_stab;
493 /* If the COMMON block we are trying to add has a blank
494 name (i.e. "#BLNK_COM") then we set it to __BLANK
495 because the darn "#" character makes GDB's input
499 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
500 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
504 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
505 strcpy (name, BLANK_COMMON_NAME_LOCAL);
508 tmp = allocate_saved_f77_common_node ();
510 local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
511 strcpy (local_copy_func_stab, func_stab);
513 tmp->name = xmalloc (strlen (name) + 1);
515 /* local_copy_func_stab is a stabstring, let us first extract the
516 function name from the stab by NULLing out the ':' character. */
520 c = strchr (local_copy_func_stab, ':');
525 error (_("Malformed function STAB found in add_common_block()"));
528 tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
530 strcpy (tmp->owning_function, local_copy_func_stab);
532 strcpy (tmp->name, name);
533 tmp->offset = offset;
536 tmp->secnum = secnum;
538 current_common = tmp;
540 if (head_common_list == NULL)
542 head_common_list = tail_common_list = tmp;
546 tail_common_list->next = tmp;
547 tail_common_list = tmp;
552 /* The following function simply enters a given common entry onto
553 the "current_common" block that has been saved away. */
557 add_common_entry (struct symbol *entry_sym_ptr)
559 COMMON_ENTRY_PTR tmp;
563 /* The order of this list is important, since
564 we expect the entries to appear in decl.
565 order when we later issue "info common" calls */
567 tmp = allocate_common_entry_node ();
570 tmp->symbol = entry_sym_ptr;
572 if (current_common == NULL)
573 error (_("Attempt to add COMMON entry with no block open!"));
576 if (current_common->entries == NULL)
578 current_common->entries = tmp;
579 current_common->end_of_entries = tmp;
583 current_common->end_of_entries->next = tmp;
584 current_common->end_of_entries = tmp;
590 /* This routine finds the first encountred COMMON block named "name" */
593 static SAVED_F77_COMMON_PTR
594 find_first_common_named (char *name)
597 SAVED_F77_COMMON_PTR tmp;
599 tmp = head_common_list;
603 if (strcmp (tmp->name, name) == 0)
612 /* This routine finds the first encountred COMMON block named "name"
613 that belongs to function funcname */
616 find_common_for_function (char *name, char *funcname)
619 SAVED_F77_COMMON_PTR tmp;
621 tmp = head_common_list;
625 if (strcmp (tmp->name, name) == 0
626 && strcmp (tmp->owning_function, funcname) == 0)
637 /* The following function is called to patch up the offsets
638 for the statics contained in the COMMON block named
642 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
644 COMMON_ENTRY_PTR entry;
646 blk->offset = offset; /* Keep this around for future use. */
648 entry = blk->entries;
650 while (entry != NULL)
652 SYMBOL_VALUE (entry->symbol) += offset;
653 SYMBOL_SECTION (entry->symbol) = secnum;
657 blk->secnum = secnum;
660 /* Patch all commons named "name" that need patching.Since COMMON
661 blocks occur with relative infrequency, we simply do a linear scan on
662 the name. Eventually, the best way to do this will be a
663 hashed-lookup. Secnum is the section number for the .bss section
664 (which is where common data lives). */
667 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
670 SAVED_F77_COMMON_PTR tmp;
672 /* For blank common blocks, change the canonical reprsentation
675 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
676 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
679 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
680 strcpy (name, BLANK_COMMON_NAME_LOCAL);
683 tmp = head_common_list;
687 if (COMMON_NEEDS_PATCHING (tmp))
688 if (strcmp (tmp->name, name) == 0)
689 patch_common_entries (tmp, offset, secnum);
696 /* This macro adds the symbol-number for the start of the function
697 (the symbol number of the .bf) referenced by symnum_fcn to a
698 list. This list, in reality should be a FIFO queue but since
699 #line pragmas sometimes cause line ranges to get messed up
700 we simply create a linear list. This list can then be searched
701 first by a queueing algorithm and upon failure fall back to
705 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
707 if (saved_bf_list == NULL) \
709 tmp_bf_ptr = allocate_saved_bf_node(); \
711 tmp_bf_ptr->symnum_bf = (bf_sym); \
712 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
713 tmp_bf_ptr->next = NULL; \
715 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
716 saved_bf_list_end = tmp_bf_ptr; \
720 tmp_bf_ptr = allocate_saved_bf_node(); \
722 tmp_bf_ptr->symnum_bf = (bf_sym); \
723 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
724 tmp_bf_ptr->next = NULL; \
726 saved_bf_list_end->next = tmp_bf_ptr; \
727 saved_bf_list_end = tmp_bf_ptr; \
731 /* This function frees the entire (.bf,function) list */
738 SAVED_BF_PTR tmp = saved_bf_list;
739 SAVED_BF_PTR next = NULL;
747 saved_bf_list = NULL;
751 int global_remote_debug;
756 get_bf_for_fcn (long the_function)
761 /* First use a simple queuing algorithm (i.e. look and see if the
762 item at the head of the queue is the one you want) */
764 if (saved_bf_list == NULL)
765 internal_error (__FILE__, __LINE__,
766 _("cannot get .bf node off empty list"));
768 if (current_head_bf_list != NULL)
769 if (current_head_bf_list->symnum_fcn == the_function)
771 if (global_remote_debug)
772 fprintf_unfiltered (gdb_stderr, "*");
774 tmp = current_head_bf_list;
775 current_head_bf_list = current_head_bf_list->next;
776 return (tmp->symnum_bf);
779 /* If the above did not work (probably because #line directives were
780 used in the sourcefile and they messed up our internal tables) we now do
781 the ugly linear scan */
783 if (global_remote_debug)
784 fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
791 if (tmp->symnum_fcn == the_function)
793 if (global_remote_debug)
794 fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
795 current_head_bf_list = tmp->next;
796 return (tmp->symnum_bf);
804 static SAVED_FUNCTION_PTR saved_function_list = NULL;
805 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
808 clear_function_list (void)
810 SAVED_FUNCTION_PTR tmp = saved_function_list;
811 SAVED_FUNCTION_PTR next = NULL;
820 saved_function_list = NULL;