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 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)
148 unsigned int things_printed = 0;
154 fputs_filtered ("''", gdb_stdout);
158 for (i = 0; i < length && things_printed < print_max; ++i)
160 /* Position of the character we are examining
161 to see whether it is repeated. */
163 /* Number of repetitions we have detected so far. */
170 fputs_filtered (", ", stream);
176 while (rep1 < length && string[rep1] == string[i])
182 if (reps > repeat_count_threshold)
187 fputs_filtered ("\\', ", stream);
189 fputs_filtered ("', ", stream);
192 f_printchar (string[i], stream);
193 fprintf_filtered (stream, " <repeats %u times>", reps);
195 things_printed += repeat_count_threshold;
203 fputs_filtered ("\\'", stream);
205 fputs_filtered ("'", stream);
208 LA_EMIT_CHAR (string[i], stream, '"');
213 /* Terminate the quotes if necessary. */
217 fputs_filtered ("\\'", stream);
219 fputs_filtered ("'", stream);
222 if (force_ellipses || i < length)
223 fputs_filtered ("...", stream);
227 /* Table of operators and their precedences for printing expressions. */
229 static const struct op_print f_op_print_tab[] =
231 {"+", BINOP_ADD, PREC_ADD, 0},
232 {"+", UNOP_PLUS, PREC_PREFIX, 0},
233 {"-", BINOP_SUB, PREC_ADD, 0},
234 {"-", UNOP_NEG, PREC_PREFIX, 0},
235 {"*", BINOP_MUL, PREC_MUL, 0},
236 {"/", BINOP_DIV, PREC_MUL, 0},
237 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
238 {"MOD", BINOP_REM, PREC_MUL, 0},
239 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
240 {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
241 {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
242 {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
243 {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
244 {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
245 {".LE.", BINOP_LEQ, PREC_ORDER, 0},
246 {".GE.", BINOP_GEQ, PREC_ORDER, 0},
247 {".GT.", BINOP_GTR, PREC_ORDER, 0},
248 {".LT.", BINOP_LESS, PREC_ORDER, 0},
249 {"**", UNOP_IND, PREC_PREFIX, 0},
250 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
254 enum f_primitive_types {
255 f_primitive_type_character,
256 f_primitive_type_logical,
257 f_primitive_type_logical_s1,
258 f_primitive_type_logical_s2,
259 f_primitive_type_integer,
260 f_primitive_type_integer_s2,
261 f_primitive_type_real,
262 f_primitive_type_real_s8,
263 f_primitive_type_real_s16,
264 f_primitive_type_complex_s8,
265 f_primitive_type_complex_s16,
266 f_primitive_type_void,
271 f_language_arch_info (struct gdbarch *gdbarch,
272 struct language_arch_info *lai)
274 const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
276 lai->string_char_type = builtin->builtin_character;
277 lai->primitive_type_vector
278 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
281 lai->primitive_type_vector [f_primitive_type_character]
282 = builtin->builtin_character;
283 lai->primitive_type_vector [f_primitive_type_logical]
284 = builtin->builtin_logical;
285 lai->primitive_type_vector [f_primitive_type_logical_s1]
286 = builtin->builtin_logical_s1;
287 lai->primitive_type_vector [f_primitive_type_logical_s2]
288 = builtin->builtin_logical_s2;
289 lai->primitive_type_vector [f_primitive_type_real]
290 = builtin->builtin_real;
291 lai->primitive_type_vector [f_primitive_type_real_s8]
292 = builtin->builtin_real_s8;
293 lai->primitive_type_vector [f_primitive_type_real_s16]
294 = builtin->builtin_real_s16;
295 lai->primitive_type_vector [f_primitive_type_complex_s8]
296 = builtin->builtin_complex_s8;
297 lai->primitive_type_vector [f_primitive_type_complex_s16]
298 = builtin->builtin_complex_s16;
299 lai->primitive_type_vector [f_primitive_type_void]
300 = builtin->builtin_void;
303 /* This is declared in c-lang.h but it is silly to import that file for what
304 is already just a hack. */
305 extern int c_value_print (struct value *, struct ui_file *, int,
306 enum val_prettyprint);
308 const struct language_defn f_language_defn =
316 &exp_descriptor_standard,
317 f_parse, /* parser */
318 f_error, /* parser error function */
320 f_printchar, /* Print character constant */
321 f_printstr, /* function to print string constant */
322 f_emit_char, /* Function to print a single character */
323 f_print_type, /* Print a type using appropriate syntax */
324 f_val_print, /* Print a value using appropriate syntax */
325 c_value_print, /* FIXME */
326 NULL, /* Language specific skip_trampoline */
327 value_of_this, /* value_of_this */
328 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
329 basic_lookup_transparent_type,/* lookup_transparent_type */
330 NULL, /* Language specific symbol demangler */
331 NULL, /* Language specific class_name_from_physname */
332 f_op_print_tab, /* expression operators for printing */
333 0, /* arrays are first-class (not c-style) */
334 1, /* String lower bound */
335 default_word_break_characters,
336 f_language_arch_info,
337 default_print_array_index,
338 default_pass_by_reference,
343 build_fortran_types (struct gdbarch *gdbarch)
345 struct builtin_f_type *builtin_f_type
346 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
348 builtin_f_type->builtin_void =
349 init_type (TYPE_CODE_VOID, 1,
351 "VOID", (struct objfile *) NULL);
353 builtin_f_type->builtin_character =
354 init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
356 "character", (struct objfile *) NULL);
358 builtin_f_type->builtin_logical_s1 =
359 init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
361 "logical*1", (struct objfile *) NULL);
363 builtin_f_type->builtin_integer_s2 =
364 init_type (TYPE_CODE_INT,
365 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
366 0, "integer*2", (struct objfile *) NULL);
368 builtin_f_type->builtin_logical_s2 =
369 init_type (TYPE_CODE_BOOL,
370 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
371 TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
373 builtin_f_type->builtin_integer =
374 init_type (TYPE_CODE_INT,
375 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
376 0, "integer", (struct objfile *) NULL);
378 builtin_f_type->builtin_logical =
379 init_type (TYPE_CODE_BOOL,
380 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
381 TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
383 builtin_f_type->builtin_real =
384 init_type (TYPE_CODE_FLT,
385 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
387 "real", (struct objfile *) NULL);
389 builtin_f_type->builtin_real_s8 =
390 init_type (TYPE_CODE_FLT,
391 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
393 "real*8", (struct objfile *) NULL);
395 builtin_f_type->builtin_real_s16 =
396 init_type (TYPE_CODE_FLT,
397 gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
399 "real*16", (struct objfile *) NULL);
401 builtin_f_type->builtin_complex_s8 =
402 init_type (TYPE_CODE_COMPLEX,
403 2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
405 "complex*8", (struct objfile *) NULL);
406 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
407 = builtin_f_type->builtin_real;
409 builtin_f_type->builtin_complex_s16 =
410 init_type (TYPE_CODE_COMPLEX,
411 2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
413 "complex*16", (struct objfile *) NULL);
414 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
415 = builtin_f_type->builtin_real_s8;
417 /* We have a new size == 4 double floats for the
418 complex*32 data type */
420 builtin_f_type->builtin_complex_s32 =
421 init_type (TYPE_CODE_COMPLEX,
422 2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
424 "complex*32", (struct objfile *) NULL);
425 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
426 = builtin_f_type->builtin_real_s16;
428 return builtin_f_type;
431 static struct gdbarch_data *f_type_data;
433 const struct builtin_f_type *
434 builtin_f_type (struct gdbarch *gdbarch)
436 return gdbarch_data (gdbarch, f_type_data);
440 _initialize_f_language (void)
442 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
444 add_language (&f_language_defn);
449 allocate_saved_bf_node (void)
453 new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
457 static SAVED_FUNCTION *
458 allocate_saved_function_node (void)
462 new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
466 static SAVED_F77_COMMON_PTR
467 allocate_saved_f77_common_node (void)
469 SAVED_F77_COMMON_PTR new;
471 new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
475 static COMMON_ENTRY_PTR
476 allocate_common_entry_node (void)
478 COMMON_ENTRY_PTR new;
480 new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
485 SAVED_F77_COMMON_PTR head_common_list = NULL; /* Ptr to 1st saved COMMON */
486 SAVED_F77_COMMON_PTR tail_common_list = NULL; /* Ptr to last saved COMMON */
487 SAVED_F77_COMMON_PTR current_common = NULL; /* Ptr to current COMMON */
490 static SAVED_BF_PTR saved_bf_list = NULL; /* Ptr to (.bf,function)
492 static SAVED_BF_PTR saved_bf_list_end = NULL; /* Ptr to above list's end */
493 static SAVED_BF_PTR current_head_bf_list = NULL; /* Current head of above list
496 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
499 /* The following function simply enters a given common block onto
500 the global common block chain */
503 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
505 SAVED_F77_COMMON_PTR tmp;
506 char *c, *local_copy_func_stab;
508 /* If the COMMON block we are trying to add has a blank
509 name (i.e. "#BLNK_COM") then we set it to __BLANK
510 because the darn "#" character makes GDB's input
514 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
515 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
519 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
520 strcpy (name, BLANK_COMMON_NAME_LOCAL);
523 tmp = allocate_saved_f77_common_node ();
525 local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
526 strcpy (local_copy_func_stab, func_stab);
528 tmp->name = xmalloc (strlen (name) + 1);
530 /* local_copy_func_stab is a stabstring, let us first extract the
531 function name from the stab by NULLing out the ':' character. */
535 c = strchr (local_copy_func_stab, ':');
540 error (_("Malformed function STAB found in add_common_block()"));
543 tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
545 strcpy (tmp->owning_function, local_copy_func_stab);
547 strcpy (tmp->name, name);
548 tmp->offset = offset;
551 tmp->secnum = secnum;
553 current_common = tmp;
555 if (head_common_list == NULL)
557 head_common_list = tail_common_list = tmp;
561 tail_common_list->next = tmp;
562 tail_common_list = tmp;
567 /* The following function simply enters a given common entry onto
568 the "current_common" block that has been saved away. */
572 add_common_entry (struct symbol *entry_sym_ptr)
574 COMMON_ENTRY_PTR tmp;
578 /* The order of this list is important, since
579 we expect the entries to appear in decl.
580 order when we later issue "info common" calls */
582 tmp = allocate_common_entry_node ();
585 tmp->symbol = entry_sym_ptr;
587 if (current_common == NULL)
588 error (_("Attempt to add COMMON entry with no block open!"));
591 if (current_common->entries == NULL)
593 current_common->entries = tmp;
594 current_common->end_of_entries = tmp;
598 current_common->end_of_entries->next = tmp;
599 current_common->end_of_entries = tmp;
605 /* This routine finds the first encountred COMMON block named "name" */
608 static SAVED_F77_COMMON_PTR
609 find_first_common_named (char *name)
612 SAVED_F77_COMMON_PTR tmp;
614 tmp = head_common_list;
618 if (strcmp (tmp->name, name) == 0)
627 /* This routine finds the first encountred COMMON block named "name"
628 that belongs to function funcname */
631 find_common_for_function (char *name, char *funcname)
634 SAVED_F77_COMMON_PTR tmp;
636 tmp = head_common_list;
640 if (DEPRECATED_STREQ (tmp->name, name)
641 && DEPRECATED_STREQ (tmp->owning_function, funcname))
652 /* The following function is called to patch up the offsets
653 for the statics contained in the COMMON block named
657 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
659 COMMON_ENTRY_PTR entry;
661 blk->offset = offset; /* Keep this around for future use. */
663 entry = blk->entries;
665 while (entry != NULL)
667 SYMBOL_VALUE (entry->symbol) += offset;
668 SYMBOL_SECTION (entry->symbol) = secnum;
672 blk->secnum = secnum;
675 /* Patch all commons named "name" that need patching.Since COMMON
676 blocks occur with relative infrequency, we simply do a linear scan on
677 the name. Eventually, the best way to do this will be a
678 hashed-lookup. Secnum is the section number for the .bss section
679 (which is where common data lives). */
682 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
685 SAVED_F77_COMMON_PTR tmp;
687 /* For blank common blocks, change the canonical reprsentation
690 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
691 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
694 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
695 strcpy (name, BLANK_COMMON_NAME_LOCAL);
698 tmp = head_common_list;
702 if (COMMON_NEEDS_PATCHING (tmp))
703 if (strcmp (tmp->name, name) == 0)
704 patch_common_entries (tmp, offset, secnum);
711 /* This macro adds the symbol-number for the start of the function
712 (the symbol number of the .bf) referenced by symnum_fcn to a
713 list. This list, in reality should be a FIFO queue but since
714 #line pragmas sometimes cause line ranges to get messed up
715 we simply create a linear list. This list can then be searched
716 first by a queueing algorithm and upon failure fall back to
720 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
722 if (saved_bf_list == NULL) \
724 tmp_bf_ptr = allocate_saved_bf_node(); \
726 tmp_bf_ptr->symnum_bf = (bf_sym); \
727 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
728 tmp_bf_ptr->next = NULL; \
730 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
731 saved_bf_list_end = tmp_bf_ptr; \
735 tmp_bf_ptr = allocate_saved_bf_node(); \
737 tmp_bf_ptr->symnum_bf = (bf_sym); \
738 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
739 tmp_bf_ptr->next = NULL; \
741 saved_bf_list_end->next = tmp_bf_ptr; \
742 saved_bf_list_end = tmp_bf_ptr; \
746 /* This function frees the entire (.bf,function) list */
753 SAVED_BF_PTR tmp = saved_bf_list;
754 SAVED_BF_PTR next = NULL;
762 saved_bf_list = NULL;
766 int global_remote_debug;
771 get_bf_for_fcn (long the_function)
776 /* First use a simple queuing algorithm (i.e. look and see if the
777 item at the head of the queue is the one you want) */
779 if (saved_bf_list == NULL)
780 internal_error (__FILE__, __LINE__,
781 _("cannot get .bf node off empty list"));
783 if (current_head_bf_list != NULL)
784 if (current_head_bf_list->symnum_fcn == the_function)
786 if (global_remote_debug)
787 fprintf_unfiltered (gdb_stderr, "*");
789 tmp = current_head_bf_list;
790 current_head_bf_list = current_head_bf_list->next;
791 return (tmp->symnum_bf);
794 /* If the above did not work (probably because #line directives were
795 used in the sourcefile and they messed up our internal tables) we now do
796 the ugly linear scan */
798 if (global_remote_debug)
799 fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
806 if (tmp->symnum_fcn == the_function)
808 if (global_remote_debug)
809 fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
810 current_head_bf_list = tmp->next;
811 return (tmp->symnum_bf);
819 static SAVED_FUNCTION_PTR saved_function_list = NULL;
820 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
823 clear_function_list (void)
825 SAVED_FUNCTION_PTR tmp = saved_function_list;
826 SAVED_FUNCTION_PTR next = NULL;
835 saved_function_list = NULL;