1 /* Support for printing Fortran values for GDB, the GNU debugger.
3 Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003, 2005, 2006,
4 2007, 2008, 2009 Free Software Foundation, Inc.
6 Contributed by Motorola. Adapted from the C definitions by Farooq Butt
7 (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs.
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"
39 static int there_is_a_visible_common_named (char *);
42 extern void _initialize_f_valprint (void);
43 static void info_common_command (char *, int);
44 static void list_all_visible_commons (char *);
45 static void f77_create_arrayprint_offset_tbl (struct type *,
47 static void f77_get_dynamic_length_of_aggregate (struct type *);
49 int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
51 /* Array which holds offsets to be applied to get a row's elements
52 for a given array. Array also holds the size of each subarray. */
54 /* The following macro gives us the size of the nth dimension, Where
57 #define F77_DIM_SIZE(n) (f77_array_offset_tbl[n][1])
59 /* The following gives us the offset for row n where n is 1-based. */
61 #define F77_DIM_OFFSET(n) (f77_array_offset_tbl[n][0])
64 f77_get_lowerbound (struct type *type)
66 if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
67 error (_("Lower bound may not be '*' in F77"));
69 return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
73 f77_get_upperbound (struct type *type)
75 if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
77 /* We have an assumed size array on our hands. Assume that
78 upper_bound == lower_bound so that we show at least 1 element.
79 If the user wants to see more elements, let him manually ask for 'em
80 and we'll subscript the array and show him. */
82 return f77_get_lowerbound (type);
85 return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
88 /* Obtain F77 adjustable array dimensions */
91 f77_get_dynamic_length_of_aggregate (struct type *type)
97 /* Recursively go all the way down into a possibly multi-dimensional
98 F77 array and get the bounds. For simple arrays, this is pretty
99 easy but when the bounds are dynamic, we must be very careful
100 to add up all the lengths correctly. Not doing this right
101 will lead to horrendous-looking arrays in parameter lists.
103 This function also works for strings which behave very
104 similarly to arrays. */
106 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
107 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
108 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
110 /* Recursion ends here, start setting up lengths. */
111 lower_bound = f77_get_lowerbound (type);
112 upper_bound = f77_get_upperbound (type);
114 /* Patch in a valid length value. */
117 (upper_bound - lower_bound + 1) * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
120 /* Function that sets up the array offset,size table for the array
124 f77_create_arrayprint_offset_tbl (struct type *type, struct ui_file *stream)
126 struct type *tmp_type;
129 int upper, lower, retcode;
133 while ((TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY))
135 upper = f77_get_upperbound (tmp_type);
136 lower = f77_get_lowerbound (tmp_type);
138 F77_DIM_SIZE (ndimen) = upper - lower + 1;
140 tmp_type = TYPE_TARGET_TYPE (tmp_type);
144 /* Now we multiply eltlen by all the offsets, so that later we
145 can print out array elements correctly. Up till now we
146 know an offset to apply to get the item but we also
147 have to know how much to add to get to the next item */
150 eltlen = TYPE_LENGTH (tmp_type);
151 F77_DIM_OFFSET (ndimen) = eltlen;
154 eltlen *= F77_DIM_SIZE (ndimen + 1);
155 F77_DIM_OFFSET (ndimen) = eltlen;
161 /* Actual function which prints out F77 arrays, Valaddr == address in
162 the superior. Address == the address in the inferior. */
165 f77_print_array_1 (int nss, int ndimensions, struct type *type,
166 const gdb_byte *valaddr, CORE_ADDR address,
167 struct ui_file *stream, int recurse,
168 const struct value_print_options *options,
173 if (nss != ndimensions)
175 for (i = 0; (i < F77_DIM_SIZE (nss) && (*elts) < options->print_max); i++)
177 fprintf_filtered (stream, "( ");
178 f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type),
179 valaddr + i * F77_DIM_OFFSET (nss),
180 address + i * F77_DIM_OFFSET (nss),
181 stream, recurse, options, elts);
182 fprintf_filtered (stream, ") ");
184 if (*elts >= options->print_max && i < F77_DIM_SIZE (nss))
185 fprintf_filtered (stream, "...");
189 for (i = 0; i < F77_DIM_SIZE (nss) && (*elts) < options->print_max;
192 val_print (TYPE_TARGET_TYPE (type),
193 valaddr + i * F77_DIM_OFFSET (ndimensions),
195 address + i * F77_DIM_OFFSET (ndimensions),
196 stream, recurse, options, current_language);
198 if (i != (F77_DIM_SIZE (nss) - 1))
199 fprintf_filtered (stream, ", ");
201 if ((*elts == options->print_max - 1)
202 && (i != (F77_DIM_SIZE (nss) - 1)))
203 fprintf_filtered (stream, "...");
208 /* This function gets called to print an F77 array, we set up some
209 stuff and then immediately call f77_print_array_1() */
212 f77_print_array (struct type *type, const gdb_byte *valaddr,
213 CORE_ADDR address, struct ui_file *stream,
214 int recurse, const struct value_print_options *options)
219 ndimensions = calc_f77_array_dims (type);
221 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
222 error (_("Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
223 ndimensions, MAX_FORTRAN_DIMS);
225 /* Since F77 arrays are stored column-major, we set up an
226 offset table to get at the various row's elements. The
227 offset table contains entries for both offset and subarray size. */
229 f77_create_arrayprint_offset_tbl (type, stream);
231 f77_print_array_1 (1, ndimensions, type, valaddr, address, stream,
232 recurse, options, &elts);
236 /* Print data of type TYPE located at VALADDR (within GDB), which came from
237 the inferior at address ADDRESS, onto stdio stream STREAM according to
238 OPTIONS. The data at VALADDR is in target byte order.
240 If the data are a string pointer, returns the number of string characters
244 f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
245 CORE_ADDR address, struct ui_file *stream, int recurse,
246 const struct value_print_options *options)
248 struct gdbarch *gdbarch = get_type_arch (type);
249 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
250 unsigned int i = 0; /* Number of characters printed */
251 struct type *elttype;
256 CHECK_TYPEDEF (type);
257 switch (TYPE_CODE (type))
259 case TYPE_CODE_STRING:
260 f77_get_dynamic_length_of_aggregate (type);
261 LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
262 valaddr, TYPE_LENGTH (type), 0, options);
265 case TYPE_CODE_ARRAY:
266 fprintf_filtered (stream, "(");
267 f77_print_array (type, valaddr, address, stream, recurse, options);
268 fprintf_filtered (stream, ")");
272 if (options->format && options->format != 's')
274 print_scalar_formatted (valaddr, type, options, 0, stream);
279 addr = unpack_pointer (type, valaddr);
280 elttype = check_typedef (TYPE_TARGET_TYPE (type));
282 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
284 /* Try to print what function it points to. */
285 print_address_demangle (gdbarch, addr, stream, demangle);
286 /* Return value is irrelevant except for string pointers. */
290 if (options->addressprint && options->format != 's')
291 fputs_filtered (paddress (gdbarch, addr), stream);
293 /* For a pointer to char or unsigned char, also print the string
294 pointed to, unless pointer is null. */
295 if (TYPE_LENGTH (elttype) == 1
296 && TYPE_CODE (elttype) == TYPE_CODE_INT
297 && (options->format == 0 || options->format == 's')
299 i = val_print_string (TYPE_TARGET_TYPE (type), addr, -1, stream,
302 /* Return number of characters printed, including the terminating
303 '\0' if we reached the end. val_print_string takes care including
304 the terminating '\0' if necessary. */
310 elttype = check_typedef (TYPE_TARGET_TYPE (type));
311 if (options->addressprint)
314 = extract_typed_address (valaddr + embedded_offset, type);
315 fprintf_filtered (stream, "@");
316 fputs_filtered (paddress (gdbarch, addr), stream);
317 if (options->deref_ref)
318 fputs_filtered (": ", stream);
320 /* De-reference the reference. */
321 if (options->deref_ref)
323 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
325 struct value *deref_val =
327 (TYPE_TARGET_TYPE (type),
328 unpack_pointer (type, valaddr + embedded_offset));
329 common_val_print (deref_val, stream, recurse,
330 options, current_language);
333 fputs_filtered ("???", stream);
340 print_scalar_formatted (valaddr, type, options, 0, stream);
343 /* FIXME, we should consider, at least for ANSI C language, eliminating
344 the distinction made between FUNCs and POINTERs to FUNCs. */
345 fprintf_filtered (stream, "{");
346 type_print (type, "", stream, -1);
347 fprintf_filtered (stream, "} ");
348 /* Try to print what function it points to, and its address. */
349 print_address_demangle (gdbarch, address, stream, demangle);
353 if (options->format || options->output_format)
355 struct value_print_options opts = *options;
356 opts.format = (options->format ? options->format
357 : options->output_format);
358 print_scalar_formatted (valaddr, type, &opts, 0, stream);
362 val_print_type_code_int (type, valaddr, stream);
363 /* C and C++ has no single byte int type, char is used instead.
364 Since we don't know whether the value is really intended to
365 be used as an integer or a character, print the character
366 equivalent as well. */
367 if (TYPE_LENGTH (type) == 1)
369 fputs_filtered (" ", stream);
370 LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
376 case TYPE_CODE_FLAGS:
378 print_scalar_formatted (valaddr, type, options, 0, stream);
380 val_print_type_code_flags (type, valaddr, stream);
385 print_scalar_formatted (valaddr, type, options, 0, stream);
387 print_floating (valaddr, type, stream);
391 fprintf_filtered (stream, "VOID");
394 case TYPE_CODE_ERROR:
395 fprintf_filtered (stream, "<error type>");
398 case TYPE_CODE_RANGE:
399 /* FIXME, we should not ever have to print one of these yet. */
400 fprintf_filtered (stream, "<range type>");
404 if (options->format || options->output_format)
406 struct value_print_options opts = *options;
407 opts.format = (options->format ? options->format
408 : options->output_format);
409 print_scalar_formatted (valaddr, type, &opts, 0, stream);
413 val = extract_unsigned_integer (valaddr,
414 TYPE_LENGTH (type), byte_order);
416 fprintf_filtered (stream, ".FALSE.");
418 fprintf_filtered (stream, ".TRUE.");
420 /* Not a legitimate logical type, print as an integer. */
422 /* Bash the type code temporarily. */
423 TYPE_CODE (type) = TYPE_CODE_INT;
424 f_val_print (type, valaddr, 0, address, stream, recurse, options);
425 /* Restore the type code so later uses work as intended. */
426 TYPE_CODE (type) = TYPE_CODE_BOOL;
431 case TYPE_CODE_COMPLEX:
432 type = TYPE_TARGET_TYPE (type);
433 fputs_filtered ("(", stream);
434 print_floating (valaddr, type, stream);
435 fputs_filtered (",", stream);
436 print_floating (valaddr + TYPE_LENGTH (type), type, stream);
437 fputs_filtered (")", stream);
440 case TYPE_CODE_UNDEF:
441 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
442 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
443 and no complete type for struct foo in that file. */
444 fprintf_filtered (stream, "<incomplete type>");
447 case TYPE_CODE_STRUCT:
448 case TYPE_CODE_UNION:
449 /* Starting from the Fortran 90 standard, Fortran supports derived
451 fprintf_filtered (stream, "( ");
452 for (index = 0; index < TYPE_NFIELDS (type); index++)
454 int offset = TYPE_FIELD_BITPOS (type, index) / 8;
455 f_val_print (TYPE_FIELD_TYPE (type, index), valaddr + offset,
456 embedded_offset, address, stream, recurse, options);
457 if (index != TYPE_NFIELDS (type) - 1)
458 fputs_filtered (", ", stream);
460 fprintf_filtered (stream, " )");
464 error (_("Invalid F77 type code %d in symbol table."), TYPE_CODE (type));
471 list_all_visible_commons (char *funname)
473 SAVED_F77_COMMON_PTR tmp;
475 tmp = head_common_list;
477 printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
481 if (strcmp (tmp->owning_function, funname) == 0)
482 printf_filtered ("%s\n", tmp->name);
488 /* This function is used to print out the values in a given COMMON
489 block. It will always use the most local common block of the
493 info_common_command (char *comname, int from_tty)
495 SAVED_F77_COMMON_PTR the_common;
496 COMMON_ENTRY_PTR entry;
497 struct frame_info *fi;
501 /* We have been told to display the contents of F77 COMMON
502 block supposedly visible in this function. Let us
503 first make sure that it is visible and if so, let
504 us display its contents */
506 fi = get_selected_frame (_("No frame selected"));
508 /* The following is generally ripped off from stack.c's routine
509 print_frame_info() */
511 func = find_pc_function (get_frame_pc (fi));
514 /* In certain pathological cases, the symtabs give the wrong
515 function (when we are in the first function in a file which
516 is compiled without debugging symbols, the previous function
517 is compiled with debugging symbols, and the "foo.o" symbol
518 that is supposed to tell us where the file with debugging symbols
519 ends has been truncated by ar because it is longer than 15
522 So look in the minimal symbol tables as well, and if it comes
523 up with a larger address for the function use that instead.
524 I don't think this can ever cause any problems; there shouldn't
525 be any minimal symbols in the middle of a function.
526 FIXME: (Not necessarily true. What about text labels) */
528 struct minimal_symbol *msymbol =
529 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
532 && (SYMBOL_VALUE_ADDRESS (msymbol)
533 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
534 funname = SYMBOL_LINKAGE_NAME (msymbol);
536 funname = SYMBOL_LINKAGE_NAME (func);
540 struct minimal_symbol *msymbol =
541 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
544 funname = SYMBOL_LINKAGE_NAME (msymbol);
545 else /* Got no 'funname', code below will fail. */
546 error (_("No function found for frame."));
549 /* If comname is NULL, we assume the user wishes to see the
550 which COMMON blocks are visible here and then return */
554 list_all_visible_commons (funname);
558 the_common = find_common_for_function (comname, funname);
562 if (strcmp (comname, BLANK_COMMON_NAME_LOCAL) == 0)
563 printf_filtered (_("Contents of blank COMMON block:\n"));
565 printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname);
567 printf_filtered ("\n");
568 entry = the_common->entries;
570 while (entry != NULL)
572 print_variable_and_value (NULL, entry->symbol, fi, gdb_stdout, 0);
577 printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
581 /* This function is used to determine whether there is a
582 F77 common block visible at the current scope called 'comname'. */
586 there_is_a_visible_common_named (char *comname)
588 SAVED_F77_COMMON_PTR the_common;
589 struct frame_info *fi;
594 error (_("Cannot deal with NULL common name!"));
596 fi = get_selected_frame (_("No frame selected"));
598 /* The following is generally ripped off from stack.c's routine
599 print_frame_info() */
601 func = find_pc_function (fi->pc);
604 /* In certain pathological cases, the symtabs give the wrong
605 function (when we are in the first function in a file which
606 is compiled without debugging symbols, the previous function
607 is compiled with debugging symbols, and the "foo.o" symbol
608 that is supposed to tell us where the file with debugging symbols
609 ends has been truncated by ar because it is longer than 15
612 So look in the minimal symbol tables as well, and if it comes
613 up with a larger address for the function use that instead.
614 I don't think this can ever cause any problems; there shouldn't
615 be any minimal symbols in the middle of a function.
616 FIXME: (Not necessarily true. What about text labels) */
618 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
621 && (SYMBOL_VALUE_ADDRESS (msymbol)
622 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
623 funname = SYMBOL_LINKAGE_NAME (msymbol);
625 funname = SYMBOL_LINKAGE_NAME (func);
629 struct minimal_symbol *msymbol =
630 lookup_minimal_symbol_by_pc (fi->pc);
633 funname = SYMBOL_LINKAGE_NAME (msymbol);
636 the_common = find_common_for_function (comname, funname);
638 return (the_common ? 1 : 0);
643 _initialize_f_valprint (void)
645 add_info ("common", info_common_command,
646 _("Print out the values contained in a Fortran COMMON block."));
648 add_com ("lc", class_info, info_common_command,
649 _("Print out the values contained in a Fortran COMMON block."));