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;
302 lai->bool_type_symbol = "logical";
303 lai->bool_type_default = builtin->builtin_logical_s2;
306 /* This is declared in c-lang.h but it is silly to import that file for what
307 is already just a hack. */
308 extern int c_value_print (struct value *, struct ui_file *, int,
309 enum val_prettyprint);
311 const struct language_defn f_language_defn =
319 &exp_descriptor_standard,
320 f_parse, /* parser */
321 f_error, /* parser error function */
323 f_printchar, /* Print character constant */
324 f_printstr, /* function to print string constant */
325 f_emit_char, /* Function to print a single character */
326 f_print_type, /* Print a type using appropriate syntax */
327 default_print_typedef, /* Print a typedef using appropriate syntax */
328 f_val_print, /* Print a value using appropriate syntax */
329 c_value_print, /* FIXME */
330 NULL, /* Language specific skip_trampoline */
331 NULL, /* name_of_this */
332 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
333 basic_lookup_transparent_type,/* lookup_transparent_type */
334 NULL, /* Language specific symbol demangler */
335 NULL, /* Language specific class_name_from_physname */
336 f_op_print_tab, /* expression operators for printing */
337 0, /* arrays are first-class (not c-style) */
338 1, /* String lower bound */
339 default_word_break_characters,
340 default_make_symbol_completion_list,
341 f_language_arch_info,
342 default_print_array_index,
343 default_pass_by_reference,
348 build_fortran_types (struct gdbarch *gdbarch)
350 struct builtin_f_type *builtin_f_type
351 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
353 builtin_f_type->builtin_void =
354 init_type (TYPE_CODE_VOID, 1,
356 "VOID", (struct objfile *) NULL);
358 builtin_f_type->builtin_character =
359 init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
361 "character", (struct objfile *) NULL);
363 builtin_f_type->builtin_logical_s1 =
364 init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
366 "logical*1", (struct objfile *) NULL);
368 builtin_f_type->builtin_integer_s2 =
369 init_type (TYPE_CODE_INT,
370 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
371 0, "integer*2", (struct objfile *) NULL);
373 builtin_f_type->builtin_logical_s2 =
374 init_type (TYPE_CODE_BOOL,
375 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
376 TYPE_FLAG_UNSIGNED, "logical*2", (struct objfile *) NULL);
378 builtin_f_type->builtin_integer =
379 init_type (TYPE_CODE_INT,
380 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
381 0, "integer", (struct objfile *) NULL);
383 builtin_f_type->builtin_logical =
384 init_type (TYPE_CODE_BOOL,
385 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
386 TYPE_FLAG_UNSIGNED, "logical*4", (struct objfile *) NULL);
388 builtin_f_type->builtin_real =
389 init_type (TYPE_CODE_FLT,
390 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
392 "real", (struct objfile *) NULL);
394 builtin_f_type->builtin_real_s8 =
395 init_type (TYPE_CODE_FLT,
396 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
398 "real*8", (struct objfile *) NULL);
400 builtin_f_type->builtin_real_s16 =
401 init_type (TYPE_CODE_FLT,
402 gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
404 "real*16", (struct objfile *) NULL);
406 builtin_f_type->builtin_complex_s8 =
407 init_type (TYPE_CODE_COMPLEX,
408 2 * gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
410 "complex*8", (struct objfile *) NULL);
411 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s8)
412 = builtin_f_type->builtin_real;
414 builtin_f_type->builtin_complex_s16 =
415 init_type (TYPE_CODE_COMPLEX,
416 2 * gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
418 "complex*16", (struct objfile *) NULL);
419 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s16)
420 = builtin_f_type->builtin_real_s8;
422 /* We have a new size == 4 double floats for the
423 complex*32 data type */
425 builtin_f_type->builtin_complex_s32 =
426 init_type (TYPE_CODE_COMPLEX,
427 2 * gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
429 "complex*32", (struct objfile *) NULL);
430 TYPE_TARGET_TYPE (builtin_f_type->builtin_complex_s32)
431 = builtin_f_type->builtin_real_s16;
433 return builtin_f_type;
436 static struct gdbarch_data *f_type_data;
438 const struct builtin_f_type *
439 builtin_f_type (struct gdbarch *gdbarch)
441 return gdbarch_data (gdbarch, f_type_data);
445 _initialize_f_language (void)
447 f_type_data = gdbarch_data_register_post_init (build_fortran_types);
449 add_language (&f_language_defn);
454 allocate_saved_bf_node (void)
458 new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
462 static SAVED_FUNCTION *
463 allocate_saved_function_node (void)
467 new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
471 static SAVED_F77_COMMON_PTR
472 allocate_saved_f77_common_node (void)
474 SAVED_F77_COMMON_PTR new;
476 new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
480 static COMMON_ENTRY_PTR
481 allocate_common_entry_node (void)
483 COMMON_ENTRY_PTR new;
485 new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
490 SAVED_F77_COMMON_PTR head_common_list = NULL; /* Ptr to 1st saved COMMON */
491 SAVED_F77_COMMON_PTR tail_common_list = NULL; /* Ptr to last saved COMMON */
492 SAVED_F77_COMMON_PTR current_common = NULL; /* Ptr to current COMMON */
495 static SAVED_BF_PTR saved_bf_list = NULL; /* Ptr to (.bf,function)
497 static SAVED_BF_PTR saved_bf_list_end = NULL; /* Ptr to above list's end */
498 static SAVED_BF_PTR current_head_bf_list = NULL; /* Current head of above list
501 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
504 /* The following function simply enters a given common block onto
505 the global common block chain */
508 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
510 SAVED_F77_COMMON_PTR tmp;
511 char *c, *local_copy_func_stab;
513 /* If the COMMON block we are trying to add has a blank
514 name (i.e. "#BLNK_COM") then we set it to __BLANK
515 because the darn "#" character makes GDB's input
519 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
520 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
524 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
525 strcpy (name, BLANK_COMMON_NAME_LOCAL);
528 tmp = allocate_saved_f77_common_node ();
530 local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
531 strcpy (local_copy_func_stab, func_stab);
533 tmp->name = xmalloc (strlen (name) + 1);
535 /* local_copy_func_stab is a stabstring, let us first extract the
536 function name from the stab by NULLing out the ':' character. */
540 c = strchr (local_copy_func_stab, ':');
545 error (_("Malformed function STAB found in add_common_block()"));
548 tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
550 strcpy (tmp->owning_function, local_copy_func_stab);
552 strcpy (tmp->name, name);
553 tmp->offset = offset;
556 tmp->secnum = secnum;
558 current_common = tmp;
560 if (head_common_list == NULL)
562 head_common_list = tail_common_list = tmp;
566 tail_common_list->next = tmp;
567 tail_common_list = tmp;
572 /* The following function simply enters a given common entry onto
573 the "current_common" block that has been saved away. */
577 add_common_entry (struct symbol *entry_sym_ptr)
579 COMMON_ENTRY_PTR tmp;
583 /* The order of this list is important, since
584 we expect the entries to appear in decl.
585 order when we later issue "info common" calls */
587 tmp = allocate_common_entry_node ();
590 tmp->symbol = entry_sym_ptr;
592 if (current_common == NULL)
593 error (_("Attempt to add COMMON entry with no block open!"));
596 if (current_common->entries == NULL)
598 current_common->entries = tmp;
599 current_common->end_of_entries = tmp;
603 current_common->end_of_entries->next = tmp;
604 current_common->end_of_entries = tmp;
610 /* This routine finds the first encountred COMMON block named "name" */
613 static SAVED_F77_COMMON_PTR
614 find_first_common_named (char *name)
617 SAVED_F77_COMMON_PTR tmp;
619 tmp = head_common_list;
623 if (strcmp (tmp->name, name) == 0)
632 /* This routine finds the first encountred COMMON block named "name"
633 that belongs to function funcname */
636 find_common_for_function (char *name, char *funcname)
639 SAVED_F77_COMMON_PTR tmp;
641 tmp = head_common_list;
645 if (strcmp (tmp->name, name) == 0
646 && strcmp (tmp->owning_function, funcname) == 0)
657 /* The following function is called to patch up the offsets
658 for the statics contained in the COMMON block named
662 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
664 COMMON_ENTRY_PTR entry;
666 blk->offset = offset; /* Keep this around for future use. */
668 entry = blk->entries;
670 while (entry != NULL)
672 SYMBOL_VALUE (entry->symbol) += offset;
673 SYMBOL_SECTION (entry->symbol) = secnum;
677 blk->secnum = secnum;
680 /* Patch all commons named "name" that need patching.Since COMMON
681 blocks occur with relative infrequency, we simply do a linear scan on
682 the name. Eventually, the best way to do this will be a
683 hashed-lookup. Secnum is the section number for the .bss section
684 (which is where common data lives). */
687 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
690 SAVED_F77_COMMON_PTR tmp;
692 /* For blank common blocks, change the canonical reprsentation
695 if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
696 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
699 name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
700 strcpy (name, BLANK_COMMON_NAME_LOCAL);
703 tmp = head_common_list;
707 if (COMMON_NEEDS_PATCHING (tmp))
708 if (strcmp (tmp->name, name) == 0)
709 patch_common_entries (tmp, offset, secnum);
716 /* This macro adds the symbol-number for the start of the function
717 (the symbol number of the .bf) referenced by symnum_fcn to a
718 list. This list, in reality should be a FIFO queue but since
719 #line pragmas sometimes cause line ranges to get messed up
720 we simply create a linear list. This list can then be searched
721 first by a queueing algorithm and upon failure fall back to
725 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
727 if (saved_bf_list == NULL) \
729 tmp_bf_ptr = allocate_saved_bf_node(); \
731 tmp_bf_ptr->symnum_bf = (bf_sym); \
732 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
733 tmp_bf_ptr->next = NULL; \
735 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
736 saved_bf_list_end = tmp_bf_ptr; \
740 tmp_bf_ptr = allocate_saved_bf_node(); \
742 tmp_bf_ptr->symnum_bf = (bf_sym); \
743 tmp_bf_ptr->symnum_fcn = (fcn_sym); \
744 tmp_bf_ptr->next = NULL; \
746 saved_bf_list_end->next = tmp_bf_ptr; \
747 saved_bf_list_end = tmp_bf_ptr; \
751 /* This function frees the entire (.bf,function) list */
758 SAVED_BF_PTR tmp = saved_bf_list;
759 SAVED_BF_PTR next = NULL;
767 saved_bf_list = NULL;
771 int global_remote_debug;
776 get_bf_for_fcn (long the_function)
781 /* First use a simple queuing algorithm (i.e. look and see if the
782 item at the head of the queue is the one you want) */
784 if (saved_bf_list == NULL)
785 internal_error (__FILE__, __LINE__,
786 _("cannot get .bf node off empty list"));
788 if (current_head_bf_list != NULL)
789 if (current_head_bf_list->symnum_fcn == the_function)
791 if (global_remote_debug)
792 fprintf_unfiltered (gdb_stderr, "*");
794 tmp = current_head_bf_list;
795 current_head_bf_list = current_head_bf_list->next;
796 return (tmp->symnum_bf);
799 /* If the above did not work (probably because #line directives were
800 used in the sourcefile and they messed up our internal tables) we now do
801 the ugly linear scan */
803 if (global_remote_debug)
804 fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
811 if (tmp->symnum_fcn == the_function)
813 if (global_remote_debug)
814 fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
815 current_head_bf_list = tmp->next;
816 return (tmp->symnum_bf);
824 static SAVED_FUNCTION_PTR saved_function_list = NULL;
825 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
828 clear_function_list (void)
830 SAVED_FUNCTION_PTR tmp = saved_function_list;
831 SAVED_FUNCTION_PTR next = NULL;
840 saved_function_list = NULL;