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, 2010, 2011 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
)
96 /* Recursively go all the way down into a possibly multi-dimensional
97 F77 array and get the bounds. For simple arrays, this is pretty
98 easy but when the bounds are dynamic, we must be very careful
99 to add up all the lengths correctly. Not doing this right
100 will lead to horrendous-looking arrays in parameter lists.
102 This function also works for strings which behave very
103 similarly to arrays. */
105 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_ARRAY
106 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_STRING
)
107 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type
));
109 /* Recursion ends here, start setting up lengths. */
110 lower_bound
= f77_get_lowerbound (type
);
111 upper_bound
= f77_get_upperbound (type
);
113 /* Patch in a valid length value. */
116 (upper_bound
- lower_bound
+ 1)
117 * 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
;
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
,
167 int embedded_offset
, CORE_ADDR address
,
168 struct ui_file
*stream
, int recurse
,
169 const struct value
*val
,
170 const struct value_print_options
*options
,
175 if (nss
!= ndimensions
)
178 (i
< F77_DIM_SIZE (nss
) && (*elts
) < options
->print_max
);
181 fprintf_filtered (stream
, "( ");
182 f77_print_array_1 (nss
+ 1, ndimensions
, TYPE_TARGET_TYPE (type
),
184 embedded_offset
+ i
* F77_DIM_OFFSET (nss
),
186 stream
, recurse
, val
, options
, elts
);
187 fprintf_filtered (stream
, ") ");
189 if (*elts
>= options
->print_max
&& i
< F77_DIM_SIZE (nss
))
190 fprintf_filtered (stream
, "...");
194 for (i
= 0; i
< F77_DIM_SIZE (nss
) && (*elts
) < options
->print_max
;
197 val_print (TYPE_TARGET_TYPE (type
),
199 embedded_offset
+ i
* F77_DIM_OFFSET (ndimensions
),
200 address
, stream
, recurse
,
201 val
, options
, current_language
);
203 if (i
!= (F77_DIM_SIZE (nss
) - 1))
204 fprintf_filtered (stream
, ", ");
206 if ((*elts
== options
->print_max
- 1)
207 && (i
!= (F77_DIM_SIZE (nss
) - 1)))
208 fprintf_filtered (stream
, "...");
213 /* This function gets called to print an F77 array, we set up some
214 stuff and then immediately call f77_print_array_1(). */
217 f77_print_array (struct type
*type
, const gdb_byte
*valaddr
,
219 CORE_ADDR address
, struct ui_file
*stream
,
221 const struct value
*val
,
222 const struct value_print_options
*options
)
227 ndimensions
= calc_f77_array_dims (type
);
229 if (ndimensions
> MAX_FORTRAN_DIMS
|| ndimensions
< 0)
231 Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
232 ndimensions
, MAX_FORTRAN_DIMS
);
234 /* Since F77 arrays are stored column-major, we set up an
235 offset table to get at the various row's elements. The
236 offset table contains entries for both offset and subarray size. */
238 f77_create_arrayprint_offset_tbl (type
, stream
);
240 f77_print_array_1 (1, ndimensions
, type
, valaddr
, embedded_offset
,
241 address
, stream
, recurse
, val
, options
, &elts
);
245 /* See val_print for a description of the various parameters of this
246 function; they are identical. The semantics of the return value is
247 also identical to val_print. */
250 f_val_print (struct type
*type
, const gdb_byte
*valaddr
, int embedded_offset
,
251 CORE_ADDR address
, struct ui_file
*stream
, int recurse
,
252 const struct value
*original_value
,
253 const struct value_print_options
*options
)
255 struct gdbarch
*gdbarch
= get_type_arch (type
);
256 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
257 unsigned int i
= 0; /* Number of characters printed. */
258 struct type
*elttype
;
263 CHECK_TYPEDEF (type
);
264 switch (TYPE_CODE (type
))
266 case TYPE_CODE_STRING
:
267 f77_get_dynamic_length_of_aggregate (type
);
268 LA_PRINT_STRING (stream
, builtin_type (gdbarch
)->builtin_char
,
269 valaddr
+ embedded_offset
,
270 TYPE_LENGTH (type
), NULL
, 0, options
);
273 case TYPE_CODE_ARRAY
:
274 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_CHAR
)
276 fprintf_filtered (stream
, "(");
277 f77_print_array (type
, valaddr
, embedded_offset
,
278 address
, stream
, recurse
, original_value
, options
);
279 fprintf_filtered (stream
, ")");
283 struct type
*ch_type
= TYPE_TARGET_TYPE (type
);
285 f77_get_dynamic_length_of_aggregate (type
);
286 LA_PRINT_STRING (stream
, ch_type
,
287 valaddr
+ embedded_offset
,
288 TYPE_LENGTH (type
) / TYPE_LENGTH (ch_type
),
294 if (options
->format
&& options
->format
!= 's')
296 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
297 original_value
, options
, 0, stream
);
302 addr
= unpack_pointer (type
, valaddr
+ embedded_offset
);
303 elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
305 if (TYPE_CODE (elttype
) == TYPE_CODE_FUNC
)
307 /* Try to print what function it points to. */
308 print_address_demangle (gdbarch
, addr
, stream
, demangle
);
309 /* Return value is irrelevant except for string pointers. */
313 if (options
->addressprint
&& options
->format
!= 's')
314 fputs_filtered (paddress (gdbarch
, addr
), stream
);
316 /* For a pointer to char or unsigned char, also print the string
317 pointed to, unless pointer is null. */
318 if (TYPE_LENGTH (elttype
) == 1
319 && TYPE_CODE (elttype
) == TYPE_CODE_INT
320 && (options
->format
== 0 || options
->format
== 's')
322 i
= val_print_string (TYPE_TARGET_TYPE (type
), NULL
, addr
, -1,
325 /* Return number of characters printed, including the terminating
326 '\0' if we reached the end. val_print_string takes care including
327 the terminating '\0' if necessary. */
333 elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
334 if (options
->addressprint
)
337 = extract_typed_address (valaddr
+ embedded_offset
, type
);
339 fprintf_filtered (stream
, "@");
340 fputs_filtered (paddress (gdbarch
, addr
), stream
);
341 if (options
->deref_ref
)
342 fputs_filtered (": ", stream
);
344 /* De-reference the reference. */
345 if (options
->deref_ref
)
347 if (TYPE_CODE (elttype
) != TYPE_CODE_UNDEF
)
349 struct value
*deref_val
=
351 (TYPE_TARGET_TYPE (type
),
352 unpack_pointer (type
, valaddr
+ embedded_offset
));
354 common_val_print (deref_val
, stream
, recurse
,
355 options
, current_language
);
358 fputs_filtered ("???", stream
);
365 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
366 original_value
, options
, 0, stream
);
369 /* FIXME, we should consider, at least for ANSI C language, eliminating
370 the distinction made between FUNCs and POINTERs to FUNCs. */
371 fprintf_filtered (stream
, "{");
372 type_print (type
, "", stream
, -1);
373 fprintf_filtered (stream
, "} ");
374 /* Try to print what function it points to, and its address. */
375 print_address_demangle (gdbarch
, address
, stream
, demangle
);
380 if (options
->format
|| options
->output_format
)
382 struct value_print_options opts
= *options
;
384 opts
.format
= (options
->format
? options
->format
385 : options
->output_format
);
386 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
387 original_value
, options
, 0, stream
);
391 val_print_type_code_int (type
, valaddr
+ embedded_offset
, stream
);
392 /* C and C++ has no single byte int type, char is used instead.
393 Since we don't know whether the value is really intended to
394 be used as an integer or a character, print the character
395 equivalent as well. */
396 if (TYPE_LENGTH (type
) == 1 || TYPE_CODE (type
) == TYPE_CODE_CHAR
)
400 fputs_filtered (" ", stream
);
401 c
= unpack_long (type
, valaddr
+ embedded_offset
);
402 LA_PRINT_CHAR ((unsigned char) c
, type
, stream
);
407 case TYPE_CODE_FLAGS
:
409 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
410 original_value
, options
, 0, stream
);
412 val_print_type_code_flags (type
, valaddr
+ embedded_offset
, stream
);
417 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
418 original_value
, options
, 0, stream
);
420 print_floating (valaddr
+ embedded_offset
, type
, stream
);
424 fprintf_filtered (stream
, "VOID");
427 case TYPE_CODE_ERROR
:
428 fprintf_filtered (stream
, "%s", TYPE_ERROR_NAME (type
));
431 case TYPE_CODE_RANGE
:
432 /* FIXME, we should not ever have to print one of these yet. */
433 fprintf_filtered (stream
, "<range type>");
437 if (options
->format
|| options
->output_format
)
439 struct value_print_options opts
= *options
;
441 opts
.format
= (options
->format
? options
->format
442 : options
->output_format
);
443 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
444 original_value
, &opts
, 0, stream
);
448 val
= extract_unsigned_integer (valaddr
+ embedded_offset
,
449 TYPE_LENGTH (type
), byte_order
);
451 fprintf_filtered (stream
, ".FALSE.");
453 fprintf_filtered (stream
, ".TRUE.");
455 /* Not a legitimate logical type, print as an integer. */
457 /* Bash the type code temporarily. */
458 TYPE_CODE (type
) = TYPE_CODE_INT
;
459 val_print (type
, valaddr
, embedded_offset
,
460 address
, stream
, recurse
,
461 original_value
, options
, current_language
);
462 /* Restore the type code so later uses work as intended. */
463 TYPE_CODE (type
) = TYPE_CODE_BOOL
;
468 case TYPE_CODE_COMPLEX
:
469 type
= TYPE_TARGET_TYPE (type
);
470 fputs_filtered ("(", stream
);
471 print_floating (valaddr
+ embedded_offset
, type
, stream
);
472 fputs_filtered (",", stream
);
473 print_floating (valaddr
+ embedded_offset
+ TYPE_LENGTH (type
),
475 fputs_filtered (")", stream
);
478 case TYPE_CODE_UNDEF
:
479 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
480 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
481 and no complete type for struct foo in that file. */
482 fprintf_filtered (stream
, "<incomplete type>");
485 case TYPE_CODE_STRUCT
:
486 case TYPE_CODE_UNION
:
487 /* Starting from the Fortran 90 standard, Fortran supports derived
489 fprintf_filtered (stream
, "( ");
490 for (index
= 0; index
< TYPE_NFIELDS (type
); index
++)
492 int offset
= TYPE_FIELD_BITPOS (type
, index
) / 8;
494 val_print (TYPE_FIELD_TYPE (type
, index
), valaddr
,
495 embedded_offset
+ offset
,
496 address
, stream
, recurse
+ 1,
497 original_value
, options
, current_language
);
498 if (index
!= TYPE_NFIELDS (type
) - 1)
499 fputs_filtered (", ", stream
);
501 fprintf_filtered (stream
, " )");
505 error (_("Invalid F77 type code %d in symbol table."), TYPE_CODE (type
));
512 list_all_visible_commons (char *funname
)
514 SAVED_F77_COMMON_PTR tmp
;
516 tmp
= head_common_list
;
518 printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
522 if (strcmp (tmp
->owning_function
, funname
) == 0)
523 printf_filtered ("%s\n", tmp
->name
);
529 /* This function is used to print out the values in a given COMMON
530 block. It will always use the most local common block of the
534 info_common_command (char *comname
, int from_tty
)
536 SAVED_F77_COMMON_PTR the_common
;
537 COMMON_ENTRY_PTR entry
;
538 struct frame_info
*fi
;
542 /* We have been told to display the contents of F77 COMMON
543 block supposedly visible in this function. Let us
544 first make sure that it is visible and if so, let
545 us display its contents. */
547 fi
= get_selected_frame (_("No frame selected"));
549 /* The following is generally ripped off from stack.c's routine
550 print_frame_info(). */
552 func
= find_pc_function (get_frame_pc (fi
));
555 /* In certain pathological cases, the symtabs give the wrong
556 function (when we are in the first function in a file which
557 is compiled without debugging symbols, the previous function
558 is compiled with debugging symbols, and the "foo.o" symbol
559 that is supposed to tell us where the file with debugging symbols
560 ends has been truncated by ar because it is longer than 15
563 So look in the minimal symbol tables as well, and if it comes
564 up with a larger address for the function use that instead.
565 I don't think this can ever cause any problems; there shouldn't
566 be any minimal symbols in the middle of a function.
567 FIXME: (Not necessarily true. What about text labels?) */
569 struct minimal_symbol
*msymbol
=
570 lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
573 && (SYMBOL_VALUE_ADDRESS (msymbol
)
574 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
575 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
577 funname
= SYMBOL_LINKAGE_NAME (func
);
581 struct minimal_symbol
*msymbol
=
582 lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
585 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
586 else /* Got no 'funname', code below will fail. */
587 error (_("No function found for frame."));
590 /* If comname is NULL, we assume the user wishes to see the
591 which COMMON blocks are visible here and then return. */
595 list_all_visible_commons (funname
);
599 the_common
= find_common_for_function (comname
, funname
);
603 if (strcmp (comname
, BLANK_COMMON_NAME_LOCAL
) == 0)
604 printf_filtered (_("Contents of blank COMMON block:\n"));
606 printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname
);
608 printf_filtered ("\n");
609 entry
= the_common
->entries
;
611 while (entry
!= NULL
)
613 print_variable_and_value (NULL
, entry
->symbol
, fi
, gdb_stdout
, 0);
618 printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
622 /* This function is used to determine whether there is a
623 F77 common block visible at the current scope called 'comname'. */
627 there_is_a_visible_common_named (char *comname
)
629 SAVED_F77_COMMON_PTR the_common
;
630 struct frame_info
*fi
;
635 error (_("Cannot deal with NULL common name!"));
637 fi
= get_selected_frame (_("No frame selected"));
639 /* The following is generally ripped off from stack.c's routine
640 print_frame_info(). */
642 func
= find_pc_function (fi
->pc
);
645 /* In certain pathological cases, the symtabs give the wrong
646 function (when we are in the first function in a file which
647 is compiled without debugging symbols, the previous function
648 is compiled with debugging symbols, and the "foo.o" symbol
649 that is supposed to tell us where the file with debugging symbols
650 ends has been truncated by ar because it is longer than 15
653 So look in the minimal symbol tables as well, and if it comes
654 up with a larger address for the function use that instead.
655 I don't think this can ever cause any problems; there shouldn't
656 be any minimal symbols in the middle of a function.
657 FIXME: (Not necessarily true. What about text labels?) */
659 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
662 && (SYMBOL_VALUE_ADDRESS (msymbol
)
663 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
664 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
666 funname
= SYMBOL_LINKAGE_NAME (func
);
670 struct minimal_symbol
*msymbol
=
671 lookup_minimal_symbol_by_pc (fi
->pc
);
674 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
677 the_common
= find_common_for_function (comname
, funname
);
679 return (the_common
? 1 : 0);
684 _initialize_f_valprint (void)
686 add_info ("common", info_common_command
,
687 _("Print out the values contained in a Fortran COMMON block."));
689 add_com ("lc", class_info
, info_common_command
,
690 _("Print out the values contained in a Fortran COMMON block."));