1 /* Support for printing Fortran values for GDB, the GNU debugger.
2 Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
3 Contributed by Motorola. Adapted from the C definitions by Farooq Butt
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 #include "expression.h"
36 extern unsigned int print_max; /* No of array elements to print */
38 extern int calc_f77_array_dims PARAMS ((struct type *));
40 int f77_array_offset_tbl[MAX_FORTRAN_DIMS+1][2];
42 /* Array which holds offsets to be applied to get a row's elements
43 for a given array. Array also holds the size of each subarray. */
45 /* The following macro gives us the size of the nth dimension, Where
48 #define F77_DIM_SIZE(n) (f77_array_offset_tbl[n][1])
50 /* The following gives us the offset for row n where n is 1-based. */
52 #define F77_DIM_OFFSET(n) (f77_array_offset_tbl[n][0])
55 f77_get_dynamic_lowerbound (type, lower_bound)
59 CORE_ADDR current_frame_addr;
60 CORE_ADDR ptr_to_lower_bound;
62 switch (TYPE_ARRAY_LOWER_BOUND_TYPE (type))
64 case BOUND_BY_VALUE_ON_STACK:
65 current_frame_addr = selected_frame->frame;
66 if (current_frame_addr > 0)
69 read_memory_integer (current_frame_addr +
70 TYPE_ARRAY_LOWER_BOUND_VALUE (type),
75 *lower_bound = DEFAULT_LOWER_BOUND;
76 return BOUND_FETCH_ERROR;
81 *lower_bound = TYPE_ARRAY_LOWER_BOUND_VALUE (type);
84 case BOUND_CANNOT_BE_DETERMINED:
85 error ("Lower bound may not be '*' in F77");
88 case BOUND_BY_REF_ON_STACK:
89 current_frame_addr = selected_frame->frame;
90 if (current_frame_addr > 0)
93 read_memory_integer (current_frame_addr +
94 TYPE_ARRAY_LOWER_BOUND_VALUE (type),
96 *lower_bound = read_memory_integer (ptr_to_lower_bound, 4);
100 *lower_bound = DEFAULT_LOWER_BOUND;
101 return BOUND_FETCH_ERROR;
105 case BOUND_BY_REF_IN_REG:
106 case BOUND_BY_VALUE_IN_REG:
108 error ("??? unhandled dynamic array bound type ???");
111 return BOUND_FETCH_OK;
115 f77_get_dynamic_upperbound (type, upper_bound)
119 CORE_ADDR current_frame_addr = 0;
120 CORE_ADDR ptr_to_upper_bound;
122 switch (TYPE_ARRAY_UPPER_BOUND_TYPE (type))
124 case BOUND_BY_VALUE_ON_STACK:
125 current_frame_addr = selected_frame->frame;
126 if (current_frame_addr > 0)
129 read_memory_integer (current_frame_addr +
130 TYPE_ARRAY_UPPER_BOUND_VALUE (type),
135 *upper_bound = DEFAULT_UPPER_BOUND;
136 return BOUND_FETCH_ERROR;
141 *upper_bound = TYPE_ARRAY_UPPER_BOUND_VALUE (type);
144 case BOUND_CANNOT_BE_DETERMINED:
145 /* we have an assumed size array on our hands. Assume that
146 upper_bound == lower_bound so that we show at least
147 1 element.If the user wants to see more elements, let
148 him manually ask for 'em and we'll subscript the
149 array and show him */
150 f77_get_dynamic_lowerbound (type, upper_bound);
153 case BOUND_BY_REF_ON_STACK:
154 current_frame_addr = selected_frame->frame;
155 if (current_frame_addr > 0)
158 read_memory_integer (current_frame_addr +
159 TYPE_ARRAY_UPPER_BOUND_VALUE (type),
161 *upper_bound = read_memory_integer(ptr_to_upper_bound, 4);
165 *upper_bound = DEFAULT_UPPER_BOUND;
166 return BOUND_FETCH_ERROR;
170 case BOUND_BY_REF_IN_REG:
171 case BOUND_BY_VALUE_IN_REG:
173 error ("??? unhandled dynamic array bound type ???");
176 return BOUND_FETCH_OK;
179 /* Obtain F77 adjustable array dimensions */
182 f77_get_dynamic_length_of_aggregate (type)
185 int upper_bound = -1;
189 /* Recursively go all the way down into a possibly multi-dimensional
190 F77 array and get the bounds. For simple arrays, this is pretty
191 easy but when the bounds are dynamic, we must be very careful
192 to add up all the lengths correctly. Not doing this right
193 will lead to horrendous-looking arrays in parameter lists.
195 This function also works for strings which behave very
196 similarly to arrays. */
198 if (TYPE_CODE(TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
199 || TYPE_CODE(TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
200 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
202 /* Recursion ends here, start setting up lengths. */
203 retcode = f77_get_dynamic_lowerbound (type, &lower_bound);
204 if (retcode == BOUND_FETCH_ERROR)
205 error ("Cannot obtain valid array lower bound");
207 retcode = f77_get_dynamic_upperbound (type, &upper_bound);
208 if (retcode == BOUND_FETCH_ERROR)
209 error ("Cannot obtain valid array upper bound");
211 /* Patch in a valid length value. */
214 (upper_bound - lower_bound + 1) * TYPE_LENGTH (TYPE_TARGET_TYPE (type));
217 /* Function that sets up the array offset,size table for the array
221 f77_create_arrayprint_offset_tbl (type, stream)
225 struct type *tmp_type;
228 int upper, lower, retcode;
232 while ((TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY))
234 if (TYPE_ARRAY_UPPER_BOUND_TYPE (tmp_type) == BOUND_CANNOT_BE_DETERMINED)
235 fprintf_filtered (stream, "<assumed size array> ");
237 retcode = f77_get_dynamic_upperbound (tmp_type, &upper);
238 if (retcode == BOUND_FETCH_ERROR)
239 error ("Cannot obtain dynamic upper bound");
241 retcode = f77_get_dynamic_lowerbound(tmp_type,&lower);
242 if (retcode == BOUND_FETCH_ERROR)
243 error("Cannot obtain dynamic lower bound");
245 F77_DIM_SIZE (ndimen) = upper - lower + 1;
247 tmp_type = TYPE_TARGET_TYPE (tmp_type);
251 /* Now we multiply eltlen by all the offsets, so that later we
252 can print out array elements correctly. Up till now we
253 know an offset to apply to get the item but we also
254 have to know how much to add to get to the next item */
257 eltlen = TYPE_LENGTH (tmp_type);
258 F77_DIM_OFFSET (ndimen) = eltlen;
261 eltlen *= F77_DIM_SIZE (ndimen + 1);
262 F77_DIM_OFFSET (ndimen) = eltlen;
266 /* Actual function which prints out F77 arrays, Valaddr == address in
267 the superior. Address == the address in the inferior. */
270 f77_print_array_1 (nss, ndimensions, type, valaddr, address,
271 stream, format, deref_ref, recurse, pretty)
281 enum val_prettyprint pretty;
285 if (nss != ndimensions)
287 for (i = 0; i< F77_DIM_SIZE(nss); i++)
289 fprintf_filtered (stream, "( ");
290 f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type),
291 valaddr + i * F77_DIM_OFFSET (nss),
292 address + i * F77_DIM_OFFSET (nss),
293 stream, format, deref_ref, recurse, pretty, i);
294 fprintf_filtered (stream, ") ");
299 for (i = 0; (i < F77_DIM_SIZE (nss) && i < print_max); i++)
301 val_print (TYPE_TARGET_TYPE (type),
302 valaddr + i * F77_DIM_OFFSET (ndimensions),
303 address + i * F77_DIM_OFFSET (ndimensions),
304 stream, format, deref_ref, recurse, pretty);
306 if (i != (F77_DIM_SIZE (nss) - 1))
307 fprintf_filtered (stream, ", ");
309 if (i == print_max - 1)
310 fprintf_filtered (stream, "...");
315 /* This function gets called to print an F77 array, we set up some
316 stuff and then immediately call f77_print_array_1() */
319 f77_print_array (type, valaddr, address, stream, format, deref_ref, recurse,
328 enum val_prettyprint pretty;
332 ndimensions = calc_f77_array_dims (type);
334 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
335 error ("Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)",
336 ndimensions, MAX_FORTRAN_DIMS);
338 /* Since F77 arrays are stored column-major, we set up an
339 offset table to get at the various row's elements. The
340 offset table contains entries for both offset and subarray size. */
342 f77_create_arrayprint_offset_tbl (type, stream);
344 f77_print_array_1 (1, ndimensions, type, valaddr, address, stream, format,
345 deref_ref, recurse, pretty);
349 /* Print data of type TYPE located at VALADDR (within GDB), which came from
350 the inferior at address ADDRESS, onto stdio stream STREAM according to
351 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
354 If the data are a string pointer, returns the number of string characters
357 If DEREF_REF is nonzero, then dereference references, otherwise just print
360 The PRETTY parameter controls prettyprinting. */
363 f_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
372 enum val_prettyprint pretty;
374 register unsigned int i = 0; /* Number of characters printed */
375 struct type *elttype;
380 switch (TYPE_CODE (type))
382 case TYPE_CODE_STRING:
383 f77_get_dynamic_length_of_aggregate (type);
384 LA_PRINT_STRING (stream, valaddr, TYPE_LENGTH (type), 0);
387 case TYPE_CODE_ARRAY:
388 fprintf_filtered (stream, "(");
389 f77_print_array (type, valaddr, address, stream, format,
390 deref_ref, recurse, pretty);
391 fprintf_filtered (stream, ")");
394 /* Array of unspecified length: treat like pointer to first elt. */
395 valaddr = (char *) &address;
399 if (format && format != 's')
401 print_scalar_formatted (valaddr, type, format, 0, stream);
406 addr = unpack_pointer (type, valaddr);
407 elttype = TYPE_TARGET_TYPE (type);
409 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
411 /* Try to print what function it points to. */
412 print_address_demangle (addr, stream, demangle);
413 /* Return value is irrelevant except for string pointers. */
417 if (addressprint && format != 's')
418 fprintf_filtered (stream, "0x%x", addr);
420 /* For a pointer to char or unsigned char, also print the string
421 pointed to, unless pointer is null. */
422 if (TYPE_LENGTH (elttype) == 1
423 && TYPE_CODE (elttype) == TYPE_CODE_INT
424 && (format == 0 || format == 's')
426 i = val_print_string (addr, 0, stream);
428 /* Return number of characters printed, plus one for the
429 terminating null if we have "reached the end". */
430 return (i + (print_max && i != print_max));
437 print_scalar_formatted (valaddr, type, format, 0, stream);
440 /* FIXME, we should consider, at least for ANSI C language, eliminating
441 the distinction made between FUNCs and POINTERs to FUNCs. */
442 fprintf_filtered (stream, "{");
443 type_print (type, "", stream, -1);
444 fprintf_filtered (stream, "} ");
445 /* Try to print what function it points to, and its address. */
446 print_address_demangle (address, stream, demangle);
450 format = format ? format : output_format;
452 print_scalar_formatted (valaddr, type, format, 0, stream);
455 val_print_type_code_int (type, valaddr, stream);
456 /* C and C++ has no single byte int type, char is used instead.
457 Since we don't know whether the value is really intended to
458 be used as an integer or a character, print the character
459 equivalent as well. */
460 if (TYPE_LENGTH (type) == 1)
462 fputs_filtered (" ", stream);
463 LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
471 print_scalar_formatted (valaddr, type, format, 0, stream);
473 print_floating (valaddr, type, stream);
477 fprintf_filtered (stream, "VOID");
480 case TYPE_CODE_ERROR:
481 fprintf_filtered (stream, "<error type>");
484 case TYPE_CODE_RANGE:
485 /* FIXME, we should not ever have to print one of these yet. */
486 fprintf_filtered (stream, "<range type>");
490 format = format ? format : output_format;
492 print_scalar_formatted (valaddr, type, format, 0, stream);
496 switch (TYPE_LENGTH(type))
499 val = unpack_long (builtin_type_f_logical_s1, valaddr);
503 val = unpack_long (builtin_type_f_logical_s2, valaddr);
507 val = unpack_long (builtin_type_f_logical, valaddr);
511 error ("Logicals of length %d bytes not supported",
517 fprintf_filtered (stream, ".FALSE.");
520 fprintf_filtered (stream, ".TRUE.");
522 /* Not a legitimate logical type, print as an integer. */
524 /* Bash the type code temporarily. */
525 TYPE_CODE (type) = TYPE_CODE_INT;
526 f_val_print (type, valaddr, address, stream, format,
527 deref_ref, recurse, pretty);
528 /* Restore the type code so later uses work as intended. */
529 TYPE_CODE (type) = TYPE_CODE_BOOL;
534 case TYPE_CODE_COMPLEX:
535 switch (TYPE_LENGTH (type))
537 case 8: type = builtin_type_f_real; break;
538 case 16: type = builtin_type_f_real_s8; break;
539 case 32: type = builtin_type_f_real_s16; break;
541 error ("Cannot print out complex*%d variables", TYPE_LENGTH(type));
543 fputs_filtered ("(", stream);
544 print_floating (valaddr, type, stream);
545 fputs_filtered (",", stream);
546 print_floating (valaddr, type, stream);
547 fputs_filtered (")", stream);
550 case TYPE_CODE_UNDEF:
551 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
552 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
553 and no complete type for struct foo in that file. */
554 fprintf_filtered (stream, "<incomplete type>");
558 error ("Invalid F77 type code %d in symbol table.", TYPE_CODE (type));
565 list_all_visible_commons (funname)
568 SAVED_F77_COMMON_PTR tmp;
570 tmp = head_common_list;
572 printf_filtered ("All COMMON blocks visible at this level:\n\n");
576 if (STREQ(tmp->owning_function,funname))
577 printf_filtered ("%s\n", tmp->name);
583 /* This function is used to print out the values in a given COMMON
584 block. It will always use the most local common block of the
588 info_common_command (comname, from_tty)
592 SAVED_F77_COMMON_PTR the_common;
593 COMMON_ENTRY_PTR entry;
594 struct frame_info *fi;
595 register char *funname = 0;
598 /* We have been told to display the contents of F77 COMMON
599 block supposedly visible in this function. Let us
600 first make sure that it is visible and if so, let
601 us display its contents */
606 error ("No frame selected");
608 /* The following is generally ripped off from stack.c's routine
609 print_frame_info() */
611 func = find_pc_function (fi->pc);
614 /* In certain pathological cases, the symtabs give the wrong
615 function (when we are in the first function in a file which
616 is compiled without debugging symbols, the previous function
617 is compiled with debugging symbols, and the "foo.o" symbol
618 that is supposed to tell us where the file with debugging symbols
619 ends has been truncated by ar because it is longer than 15
622 So look in the minimal symbol tables as well, and if it comes
623 up with a larger address for the function use that instead.
624 I don't think this can ever cause any problems; there shouldn't
625 be any minimal symbols in the middle of a function.
626 FIXME: (Not necessarily true. What about text labels) */
628 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
631 && (SYMBOL_VALUE_ADDRESS (msymbol)
632 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
633 funname = SYMBOL_NAME (msymbol);
635 funname = SYMBOL_NAME (func);
639 register struct minimal_symbol *msymbol =
640 lookup_minimal_symbol_by_pc (fi->pc);
643 funname = SYMBOL_NAME (msymbol);
646 /* If comname is NULL, we assume the user wishes to see the
647 which COMMON blocks are visible here and then return */
651 list_all_visible_commons (funname);
655 the_common = find_common_for_function (comname,funname);
659 if (STREQ(comname,BLANK_COMMON_NAME_LOCAL))
660 printf_filtered ("Contents of blank COMMON block:\n");
662 printf_filtered ("Contents of F77 COMMON block '%s':\n",comname);
664 printf_filtered ("\n");
665 entry = the_common->entries;
667 while (entry != NULL)
669 printf_filtered ("%s = ",SYMBOL_NAME(entry->symbol));
670 print_variable_value (entry->symbol,fi,stdout);
671 printf_filtered ("\n");
676 printf_filtered ("Cannot locate the common block %s in function '%s'\n",
680 /* This function is used to determine whether there is a
681 F77 common block visible at the current scope called 'comname'. */
684 there_is_a_visible_common_named (comname)
687 SAVED_F77_COMMON_PTR the_common;
688 struct frame_info *fi;
689 register char *funname = 0;
693 error ("Cannot deal with NULL common name!");
698 error ("No frame selected");
700 /* The following is generally ripped off from stack.c's routine
701 print_frame_info() */
703 func = find_pc_function (fi->pc);
706 /* In certain pathological cases, the symtabs give the wrong
707 function (when we are in the first function in a file which
708 is compiled without debugging symbols, the previous function
709 is compiled with debugging symbols, and the "foo.o" symbol
710 that is supposed to tell us where the file with debugging symbols
711 ends has been truncated by ar because it is longer than 15
714 So look in the minimal symbol tables as well, and if it comes
715 up with a larger address for the function use that instead.
716 I don't think this can ever cause any problems; there shouldn't
717 be any minimal symbols in the middle of a function.
718 FIXME: (Not necessarily true. What about text labels) */
720 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
723 && (SYMBOL_VALUE_ADDRESS (msymbol)
724 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
725 funname = SYMBOL_NAME (msymbol);
727 funname = SYMBOL_NAME (func);
731 register struct minimal_symbol *msymbol =
732 lookup_minimal_symbol_by_pc (fi->pc);
735 funname = SYMBOL_NAME (msymbol);
738 the_common = find_common_for_function (comname, funname);
740 return (the_common ? 1 : 0);
744 _initialize_f_valprint ()
746 add_info ("common", info_common_command,
747 "Print out the values contained in a Fortran COMMON block.");