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 ui_file * stream);
74 static void f_emit_char (int c, struct ui_file * stream, int quoter);
76 /* Print the character C on STREAM as part of the contents of a literal
77 string whose delimiter is QUOTER. Note that that format for printing
78 characters and strings is language specific.
79 FIXME: This is a copy of the same function from c-exp.y. It should
80 be replaced with a true F77 version. */
83 f_emit_char (int c, struct ui_file *stream, int quoter)
85 c &= 0xFF; /* Avoid sign bit follies */
87 if (PRINT_LITERAL_FORM (c))
89 if (c == '\\' || c == quoter)
90 fputs_filtered ("\\", stream);
91 fprintf_filtered (stream, "%c", c);
98 fputs_filtered ("\\n", stream);
101 fputs_filtered ("\\b", stream);
104 fputs_filtered ("\\t", stream);
107 fputs_filtered ("\\f", stream);
110 fputs_filtered ("\\r", stream);
113 fputs_filtered ("\\e", stream);
116 fputs_filtered ("\\a", stream);
119 fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
125 /* FIXME: This is a copy of the same function from c-exp.y. It should
126 be replaced with a true F77version. */
129 f_printchar (int c, struct ui_file *stream)
131 fputs_filtered ("'", stream);
132 LA_EMIT_CHAR (c, stream, '\'');
133 fputs_filtered ("'", stream);
136 /* Print the character string STRING, printing at most LENGTH characters.
137 Printing stops early if the number hits print_max; repeat counts
138 are printed as appropriate. Print ellipses at the end if we
139 had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
140 FIXME: This is a copy of the same function from c-exp.y. It should
141 be replaced with a true F77 version. */
144 f_printstr (struct ui_file *stream, const gdb_byte *string,
145 unsigned int length, int width, int force_ellipses,
146 const struct value_print_options *options)
149 unsigned int things_printed = 0;
155 fputs_filtered ("''", gdb_stdout);
159 for (i = 0; i < length && things_printed < options->print_max; ++i)
161 /* Position of the character we are examining
162 to see whether it is repeated. */
164 /* Number of repetitions we have detected so far. */
171 fputs_filtered (", ", stream);
177 while (rep1 < length && string[rep1] == string[i])
183 if (reps > options->repeat_count_threshold)
187 if (options->inspect_it)
188 fputs_filtered ("\\', ", stream);
190 fputs_filtered ("', ", stream);
193 f_printchar (string[i], stream);
194 fprintf_filtered (stream, " <repeats %u times>", reps);
196 things_printed += options->repeat_count_threshold;
203 if (options->inspect_it)
204 fputs_filtered ("\\'", stream);
206 fputs_filtered ("'", stream);
209 LA_EMIT_CHAR (string[i], stream, '"');
214 /* Terminate the quotes if necessary. */
217 if (options->inspect_it)
218 fputs_filtered ("\\'", stream);
220 fputs_filtered ("'", stream);
223 if (force_ellipses || i < length)
224 fputs_filtered ("...", stream);
228 /* Table of operators and their precedences for printing expressions. */
230 static const struct op_print f_op_print_tab[] =
232 {"+", BINOP_ADD, PREC_ADD, 0},
233 {"+", UNOP_PLUS, PREC_PREFIX, 0},
234 {"-", BINOP_SUB, PREC_ADD, 0},
235 {"-", UNOP_NEG, PREC_PREFIX, 0},
236 {"*", BINOP_MUL, PREC_MUL, 0},
237 {"/", BINOP_DIV, PREC_MUL, 0},
238 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
239 {"MOD", BINOP_REM, PREC_MUL, 0},
240 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
241 {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
242 {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
243 {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
244 {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
245 {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
246 {".LE.", BINOP_LEQ, PREC_ORDER, 0},
247 {".GE.", BINOP_GEQ, PREC_ORDER, 0},
248 {".GT.", BINOP_GTR, PREC_ORDER, 0},
249 {".LT.", BINOP_LESS, PREC_ORDER, 0},
250 {"**", UNOP_IND, PREC_PREFIX, 0},
251 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
255 enum f_primitive_types {
256 f_primitive_type_character,
257 f_primitive_type_logical,
258 f_primitive_type_logical_s1,
259 f_primitive_type_logical_s2,
260 f_primitive_type_integer,
261 f_primitive_type_integer_s2,
262 f_primitive_type_real,
263 f_primitive_type_real_s8,
264 f_primitive_type_real_s16,
265 f_primitive_type_complex_s8,
266 f_primitive_type_complex_s16,
267 f_primitive_type_void,
272 f_language_arch_info (struct gdbarch *gdbarch,
273 struct language_arch_info *lai)
275 const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
277 lai->string_char_type = builtin->builtin_character;
278 lai->primitive_type_vector
279 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
282 lai->primitive_type_vector [f_primitive_type_character]
283 = builtin->builtin_character;
284 lai->primitive_type_vector [f_primitive_type_logical]
285 = builtin->builtin_logical;
286 lai->primitive_type_vector [f_primitive_type_logical_s1]
287 = builtin->builtin_logical_s1;
288 lai->primitive_type_vector [f_primitive_type_logical_s2]
289 = builtin->builtin_logical_s2;
290 lai->primitive_type_vector [f_primitive_type_real]
291 = builtin->builtin_real;
292 lai->primitive_type_vector [f_primitive_type_real_s8]
293 = builtin->builtin_real_s8;
294 lai->primitive_type_vector [f_primitive_type_real_s16]
295 = builtin->builtin_real_s16;
296 lai->primitive_type_vector [f_primitive_type_complex_s8]
297 = builtin->builtin_complex_s8;
298 lai->primitive_type_vector [f_primitive_type_complex_s16]
299 = builtin->builtin_complex_s16;
300 lai->primitive_type_vector [f_primitive_type_void]
301 = builtin->builtin_void;
303 lai->bool_type_symbol = "logical";
304 lai->bool_type_default = builtin->builtin_logical_s2;
307 /* This is declared in c-lang.h but it is silly to import that file for what
308 is already just a hack. */
309 extern int c_value_print (struct value *, struct ui_file *,
310 const struct value_print_options *);
312 const struct language_defn f_language_defn =
321 &exp_descriptor_standard,
322 f_parse, /* parser */
323 f_error, /* parser error function */
325 f_printchar, /* Print character constant */
326 f_printstr, /* function to print string constant */
327 f_emit_char, /* Function to print a single character */
328 f_print_type, /* Print a type using appropriate syntax */
329 default_print_typedef, /* Print a typedef using appropriate syntax */
330 f_val_print, /* Print a value using appropriate syntax */
331 c_value_print, /* FIXME */
332 NULL, /* Language specific skip_trampoline */
333 NULL, /* name_of_this */
334 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
335 basic_lookup_transparent_type,/* lookup_transparent_type */
336 NULL, /* Language specific symbol demangler */
337 NULL, /* Language specific class_name_from_physname */
338 f_op_print_tab, /* expression operators for printing */
339 0, /* arrays are first-class (not c-style) */
340 1, /* String lower bound */
341 default_word_break_characters,
342 default_make_symbol_completion_list,
343 f_language_arch_info,
344 default_print_array_index,
345 default_pass_by_reference,
350 build_fortran_types (struct gdbarch *gdbarch)
352 struct builtin_f_type *builtin_f_type
353 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
355 builtin_f_type->builtin_void =
356 init_type (TYPE_CODE_VOID, 1,
358 "VOID", (struct objfile *) NULL);
360 builtin_f_type->builtin_character =
361 init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
363 "character", (struct objfile *) NULL);
365 builtin_f_type->builtin_logical_s1 =
366 init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
368 "logical*1", (struct objfile *) NULL);
370 builtin_f_type->builtin_integer_s2 =
371 init_type (TYPE_CODE_INT,
372 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
373 0, "integer*2", (struct objfile *) NULL);
375 builtin_f_type->builtin_logical_s2 =
376 init_type (TYPE_CODE_BOOL,
377 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
378 TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
380 builtin_f_type->builtin_integer =
381 init_type (TYPE_CODE_INT,
382 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
383 0, "integer", (struct objfile *) NULL);
385 builtin_f_type->builtin_logical =
386 init_type (TYPE_CODE_BOOL,
387 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
388 TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
390 builtin_f_type->builtin_real =
391 init_type (TYPE_CODE_FLT,
392 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
394 "real", (struct objfile *) NULL);
396 builtin_f_type->builtin_real_s8 =
397 init_type (TYPE_CODE_FLT,
398 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
400 "real*8", (struct objfile *) NULL);
402 builtin_f_type->builtin_real_s16 =
403 init_type (TYPE_CODE_FLT,
404 gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
406 "real*16", (struct objfile *) NULL);
408 builtin_f_type->builtin_complex_s8 =
409 init_type (TYPE_CODE_COMPLEX,
410 2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
412 "complex*8", (struct objfile *) NULL);
413 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
414 = builtin_f_type->builtin_real;
416 builtin_f_type->builtin_complex_s16 =
417 init_type (TYPE_CODE_COMPLEX,
418 2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
420 "complex*16", (struct objfile *) NULL);
421 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
422 = builtin_f_type->builtin_real_s8;
424 /* We have a new size == 4 double floats for the
425 complex*32 data type */
427 builtin_f_type->builtin_complex_s32 =
428 init_type (TYPE_CODE_COMPLEX,
429 2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
431 "complex*32", (struct objfile *) NULL);
432 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
433 = builtin_f_type->builtin_real_s16;
435 return builtin_f_type;
438 static struct gdbarch_data *f_type_data;
440 const struct builtin_f_type *
441 builtin_f_type (struct gdbarch *gdbarch)
443 return gdbarch_data (gdbarch, f_type_data);
447 _initialize_f_language (void)
449 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
451 add_language (&f_language_defn);
456 allocate_saved_bf_node (void)
460 new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
464 static SAVED_FUNCTION *
465 allocate_saved_function_node (void)
469 new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
473 static SAVED_F77_COMMON_PTR
474 allocate_saved_f77_common_node (void)
476 SAVED_F77_COMMON_PTR new;
478 new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
482 static COMMON_ENTRY_PTR
483 allocate_common_entry_node (void)
485 COMMON_ENTRY_PTR new;
487 new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
492 SAVED_F77_COMMON_PTR head_common_list = NULL; /* Ptr to 1st saved COMMON */
493 SAVED_F77_COMMON_PTR tail_common_list = NULL; /* Ptr to last saved COMMON */
494 SAVED_F77_COMMON_PTR current_common = NULL; /* Ptr to current COMMON */
497 static SAVED_BF_PTR saved_bf_list = NULL; /* Ptr to (.bf,function)
499 static SAVED_BF_PTR saved_bf_list_end = NULL; /* Ptr to above list's end */
500 static SAVED_BF_PTR current_head_bf_list = NULL; /* Current head of above list
503 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
506 /* The following function simply enters a given common block onto
507 the global common block chain */
510 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
512 SAVED_F77_COMMON_PTR tmp;
513 char *c, *local_copy_func_stab;
515 /* If the COMMON block we are trying to add has a blank
516 name (i.e. "#BLNK_COM") then we set it to __BLANK
517 because the darn "#" character makes GDB's input
521 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
522 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
526 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
527 strcpy (name, BLANK_COMMON_NAME_LOCAL);
530 tmp = allocate_saved_f77_common_node ();
532 local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
533 strcpy (local_copy_func_stab, func_stab);
535 tmp->name = xmalloc (strlen (name) + 1);
537 /* local_copy_func_stab is a stabstring, let us first extract the
538 function name from the stab by NULLing out the ':' character. */
542 c = strchr (local_copy_func_stab, ':');
547 error (_("Malformed function STAB found in add_common_block()"));
550 tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
552 strcpy (tmp->owning_function, local_copy_func_stab);
554 strcpy (tmp->name, name);
555 tmp->offset = offset;
558 tmp->secnum = secnum;
560 current_common = tmp;
562 if (head_common_list == NULL)
564 head_common_list = tail_common_list = tmp;
568 tail_common_list->next = tmp;
569 tail_common_list = tmp;
574 /* The following function simply enters a given common entry onto
575 the "current_common" block that has been saved away. */
579 add_common_entry (struct symbol *entry_sym_ptr)
581 COMMON_ENTRY_PTR tmp;
585 /* The order of this list is important, since
586 we expect the entries to appear in decl.
587 order when we later issue "info common" calls */
589 tmp = allocate_common_entry_node ();
592 tmp->symbol = entry_sym_ptr;
594 if (current_common == NULL)
595 error (_("Attempt to add COMMON entry with no block open!"));
598 if (current_common->entries == NULL)
600 current_common->entries = tmp;
601 current_common->end_of_entries = tmp;
605 current_common->end_of_entries->next = tmp;
606 current_common->end_of_entries = tmp;
612 /* This routine finds the first encountred COMMON block named "name" */
615 static SAVED_F77_COMMON_PTR
616 find_first_common_named (char *name)
619 SAVED_F77_COMMON_PTR tmp;
621 tmp = head_common_list;
625 if (strcmp (tmp->name, name) == 0)
634 /* This routine finds the first encountred COMMON block named "name"
635 that belongs to function funcname */
638 find_common_for_function (char *name, char *funcname)
641 SAVED_F77_COMMON_PTR tmp;
643 tmp = head_common_list;
647 if (strcmp (tmp->name, name) == 0
648 && strcmp (tmp->owning_function, funcname) == 0)
659 /* The following function is called to patch up the offsets
660 for the statics contained in the COMMON block named
664 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
666 COMMON_ENTRY_PTR entry;
668 blk->offset = offset; /* Keep this around for future use. */
670 entry = blk->entries;
672 while (entry != NULL)
674 SYMBOL_VALUE (entry->symbol) += offset;
675 SYMBOL_SECTION (entry->symbol) = secnum;
679 blk->secnum = secnum;
682 /* Patch all commons named "name" that need patching.Since COMMON
683 blocks occur with relative infrequency, we simply do a linear scan on
684 the name. Eventually, the best way to do this will be a
685 hashed-lookup. Secnum is the section number for the .bss section
686 (which is where common data lives). */
689 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
692 SAVED_F77_COMMON_PTR tmp;
694 /* For blank common blocks, change the canonical reprsentation
697 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
698 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
701 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
702 strcpy (name, BLANK_COMMON_NAME_LOCAL);
705 tmp = head_common_list;
709 if (COMMON_NEEDS_PATCHING (tmp))
710 if (strcmp (tmp->name, name) == 0)
711 patch_common_entries (tmp, offset, secnum);
718 /* This macro adds the symbol-number for the start of the function
719 (the symbol number of the .bf) referenced by symnum_fcn to a
720 list. This list, in reality should be a FIFO queue but since
721 #line pragmas sometimes cause line ranges to get messed up
722 we simply create a linear list. This list can then be searched
723 first by a queueing algorithm and upon failure fall back to
727 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
729 if (saved_bf_list == NULL) \
731 tmp_bf_ptr = allocate_saved_bf_node(); \
733 tmp_bf_ptr->symnum_bf = (bf_sym); \
734 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
735 tmp_bf_ptr->next = NULL; \
737 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
738 saved_bf_list_end = tmp_bf_ptr; \
742 tmp_bf_ptr = allocate_saved_bf_node(); \
744 tmp_bf_ptr->symnum_bf = (bf_sym); \
745 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
746 tmp_bf_ptr->next = NULL; \
748 saved_bf_list_end->next = tmp_bf_ptr; \
749 saved_bf_list_end = tmp_bf_ptr; \
753 /* This function frees the entire (.bf,function) list */
760 SAVED_BF_PTR tmp = saved_bf_list;
761 SAVED_BF_PTR next = NULL;
769 saved_bf_list = NULL;
773 int global_remote_debug;
778 get_bf_for_fcn (long the_function)
783 /* First use a simple queuing algorithm (i.e. look and see if the
784 item at the head of the queue is the one you want) */
786 if (saved_bf_list == NULL)
787 internal_error (__FILE__, __LINE__,
788 _("cannot get .bf node off empty list"));
790 if (current_head_bf_list != NULL)
791 if (current_head_bf_list->symnum_fcn == the_function)
793 if (global_remote_debug)
794 fprintf_unfiltered (gdb_stderr, "*");
796 tmp = current_head_bf_list;
797 current_head_bf_list = current_head_bf_list->next;
798 return (tmp->symnum_bf);
801 /* If the above did not work (probably because #line directives were
802 used in the sourcefile and they messed up our internal tables) we now do
803 the ugly linear scan */
805 if (global_remote_debug)
806 fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
813 if (tmp->symnum_fcn == the_function)
815 if (global_remote_debug)
816 fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
817 current_head_bf_list = tmp->next;
818 return (tmp->symnum_bf);
826 static SAVED_FUNCTION_PTR saved_function_list = NULL;
827 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
830 clear_function_list (void)
832 SAVED_FUNCTION_PTR tmp = saved_function_list;
833 SAVED_FUNCTION_PTR next = NULL;
842 saved_function_list = NULL;