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 /* Print data of type TYPE located at VALADDR (within GDB), which came from
246 the inferior at address ADDRESS, onto stdio stream STREAM according to
247 OPTIONS. The data at VALADDR is in target byte order.
249 If the data are a string pointer, returns the number of string characters
253 f_val_print (struct type
*type
, const gdb_byte
*valaddr
, int embedded_offset
,
254 CORE_ADDR address
, struct ui_file
*stream
, int recurse
,
255 const struct value
*original_value
,
256 const struct value_print_options
*options
)
258 struct gdbarch
*gdbarch
= get_type_arch (type
);
259 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
260 unsigned int i
= 0; /* Number of characters printed. */
261 struct type
*elttype
;
266 CHECK_TYPEDEF (type
);
267 switch (TYPE_CODE (type
))
269 case TYPE_CODE_STRING
:
270 f77_get_dynamic_length_of_aggregate (type
);
271 LA_PRINT_STRING (stream
, builtin_type (gdbarch
)->builtin_char
,
272 valaddr
+ embedded_offset
,
273 TYPE_LENGTH (type
), NULL
, 0, options
);
276 case TYPE_CODE_ARRAY
:
277 fprintf_filtered (stream
, "(");
278 f77_print_array (type
, valaddr
, embedded_offset
,
279 address
, stream
, recurse
, original_value
, options
);
280 fprintf_filtered (stream
, ")");
284 if (options
->format
&& options
->format
!= 's')
286 print_scalar_formatted (valaddr
+ embedded_offset
,
287 type
, options
, 0, stream
);
292 addr
= unpack_pointer (type
, valaddr
+ embedded_offset
);
293 elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
295 if (TYPE_CODE (elttype
) == TYPE_CODE_FUNC
)
297 /* Try to print what function it points to. */
298 print_address_demangle (gdbarch
, addr
, stream
, demangle
);
299 /* Return value is irrelevant except for string pointers. */
303 if (options
->addressprint
&& options
->format
!= 's')
304 fputs_filtered (paddress (gdbarch
, addr
), stream
);
306 /* For a pointer to char or unsigned char, also print the string
307 pointed to, unless pointer is null. */
308 if (TYPE_LENGTH (elttype
) == 1
309 && TYPE_CODE (elttype
) == TYPE_CODE_INT
310 && (options
->format
== 0 || options
->format
== 's')
312 i
= val_print_string (TYPE_TARGET_TYPE (type
), NULL
, addr
, -1,
315 /* Return number of characters printed, including the terminating
316 '\0' if we reached the end. val_print_string takes care including
317 the terminating '\0' if necessary. */
323 elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
324 if (options
->addressprint
)
327 = extract_typed_address (valaddr
+ embedded_offset
, type
);
329 fprintf_filtered (stream
, "@");
330 fputs_filtered (paddress (gdbarch
, addr
), stream
);
331 if (options
->deref_ref
)
332 fputs_filtered (": ", stream
);
334 /* De-reference the reference. */
335 if (options
->deref_ref
)
337 if (TYPE_CODE (elttype
) != TYPE_CODE_UNDEF
)
339 struct value
*deref_val
=
341 (TYPE_TARGET_TYPE (type
),
342 unpack_pointer (type
, valaddr
+ embedded_offset
));
344 common_val_print (deref_val
, stream
, recurse
,
345 options
, current_language
);
348 fputs_filtered ("???", stream
);
355 print_scalar_formatted (valaddr
+ embedded_offset
,
356 type
, options
, 0, stream
);
359 /* FIXME, we should consider, at least for ANSI C language, eliminating
360 the distinction made between FUNCs and POINTERs to FUNCs. */
361 fprintf_filtered (stream
, "{");
362 type_print (type
, "", stream
, -1);
363 fprintf_filtered (stream
, "} ");
364 /* Try to print what function it points to, and its address. */
365 print_address_demangle (gdbarch
, address
, stream
, demangle
);
369 if (options
->format
|| options
->output_format
)
371 struct value_print_options opts
= *options
;
373 opts
.format
= (options
->format
? options
->format
374 : options
->output_format
);
375 print_scalar_formatted (valaddr
+ embedded_offset
,
376 type
, &opts
, 0, stream
);
380 val_print_type_code_int (type
, valaddr
+ embedded_offset
, stream
);
381 /* C and C++ has no single byte int type, char is used instead.
382 Since we don't know whether the value is really intended to
383 be used as an integer or a character, print the character
384 equivalent as well. */
385 if (TYPE_LENGTH (type
) == 1)
389 fputs_filtered (" ", stream
);
390 c
= unpack_long (type
, valaddr
+ embedded_offset
);
391 LA_PRINT_CHAR ((unsigned char) c
, type
, stream
);
396 case TYPE_CODE_FLAGS
:
398 print_scalar_formatted (valaddr
+ embedded_offset
,
399 type
, options
, 0, stream
);
401 val_print_type_code_flags (type
, valaddr
+ embedded_offset
, stream
);
406 print_scalar_formatted (valaddr
+ embedded_offset
,
407 type
, options
, 0, stream
);
409 print_floating (valaddr
+ embedded_offset
, type
, stream
);
413 fprintf_filtered (stream
, "VOID");
416 case TYPE_CODE_ERROR
:
417 fprintf_filtered (stream
, "%s", TYPE_ERROR_NAME (type
));
420 case TYPE_CODE_RANGE
:
421 /* FIXME, we should not ever have to print one of these yet. */
422 fprintf_filtered (stream
, "<range type>");
426 if (options
->format
|| options
->output_format
)
428 struct value_print_options opts
= *options
;
430 opts
.format
= (options
->format
? options
->format
431 : options
->output_format
);
432 print_scalar_formatted (valaddr
+ embedded_offset
,
433 type
, &opts
, 0, stream
);
437 val
= extract_unsigned_integer (valaddr
+ embedded_offset
,
438 TYPE_LENGTH (type
), byte_order
);
440 fprintf_filtered (stream
, ".FALSE.");
442 fprintf_filtered (stream
, ".TRUE.");
444 /* Not a legitimate logical type, print as an integer. */
446 /* Bash the type code temporarily. */
447 TYPE_CODE (type
) = TYPE_CODE_INT
;
448 val_print (type
, valaddr
, embedded_offset
,
449 address
, stream
, recurse
,
450 original_value
, options
, current_language
);
451 /* Restore the type code so later uses work as intended. */
452 TYPE_CODE (type
) = TYPE_CODE_BOOL
;
457 case TYPE_CODE_COMPLEX
:
458 type
= TYPE_TARGET_TYPE (type
);
459 fputs_filtered ("(", stream
);
460 print_floating (valaddr
+ embedded_offset
, type
, stream
);
461 fputs_filtered (",", stream
);
462 print_floating (valaddr
+ embedded_offset
+ TYPE_LENGTH (type
),
464 fputs_filtered (")", stream
);
467 case TYPE_CODE_UNDEF
:
468 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
469 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
470 and no complete type for struct foo in that file. */
471 fprintf_filtered (stream
, "<incomplete type>");
474 case TYPE_CODE_STRUCT
:
475 case TYPE_CODE_UNION
:
476 /* Starting from the Fortran 90 standard, Fortran supports derived
478 fprintf_filtered (stream
, "( ");
479 for (index
= 0; index
< TYPE_NFIELDS (type
); index
++)
481 int offset
= TYPE_FIELD_BITPOS (type
, index
) / 8;
483 val_print (TYPE_FIELD_TYPE (type
, index
), valaddr
,
484 embedded_offset
+ offset
,
485 address
, stream
, recurse
+ 1,
486 original_value
, options
, current_language
);
487 if (index
!= TYPE_NFIELDS (type
) - 1)
488 fputs_filtered (", ", stream
);
490 fprintf_filtered (stream
, " )");
494 error (_("Invalid F77 type code %d in symbol table."), TYPE_CODE (type
));
501 list_all_visible_commons (char *funname
)
503 SAVED_F77_COMMON_PTR tmp
;
505 tmp
= head_common_list
;
507 printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
511 if (strcmp (tmp
->owning_function
, funname
) == 0)
512 printf_filtered ("%s\n", tmp
->name
);
518 /* This function is used to print out the values in a given COMMON
519 block. It will always use the most local common block of the
523 info_common_command (char *comname
, int from_tty
)
525 SAVED_F77_COMMON_PTR the_common
;
526 COMMON_ENTRY_PTR entry
;
527 struct frame_info
*fi
;
531 /* We have been told to display the contents of F77 COMMON
532 block supposedly visible in this function. Let us
533 first make sure that it is visible and if so, let
534 us display its contents. */
536 fi
= get_selected_frame (_("No frame selected"));
538 /* The following is generally ripped off from stack.c's routine
539 print_frame_info(). */
541 func
= find_pc_function (get_frame_pc (fi
));
544 /* In certain pathological cases, the symtabs give the wrong
545 function (when we are in the first function in a file which
546 is compiled without debugging symbols, the previous function
547 is compiled with debugging symbols, and the "foo.o" symbol
548 that is supposed to tell us where the file with debugging symbols
549 ends has been truncated by ar because it is longer than 15
552 So look in the minimal symbol tables as well, and if it comes
553 up with a larger address for the function use that instead.
554 I don't think this can ever cause any problems; there shouldn't
555 be any minimal symbols in the middle of a function.
556 FIXME: (Not necessarily true. What about text labels?) */
558 struct minimal_symbol
*msymbol
=
559 lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
562 && (SYMBOL_VALUE_ADDRESS (msymbol
)
563 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
564 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
566 funname
= SYMBOL_LINKAGE_NAME (func
);
570 struct minimal_symbol
*msymbol
=
571 lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
574 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
575 else /* Got no 'funname', code below will fail. */
576 error (_("No function found for frame."));
579 /* If comname is NULL, we assume the user wishes to see the
580 which COMMON blocks are visible here and then return. */
584 list_all_visible_commons (funname
);
588 the_common
= find_common_for_function (comname
, funname
);
592 if (strcmp (comname
, BLANK_COMMON_NAME_LOCAL
) == 0)
593 printf_filtered (_("Contents of blank COMMON block:\n"));
595 printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname
);
597 printf_filtered ("\n");
598 entry
= the_common
->entries
;
600 while (entry
!= NULL
)
602 print_variable_and_value (NULL
, entry
->symbol
, fi
, gdb_stdout
, 0);
607 printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
611 /* This function is used to determine whether there is a
612 F77 common block visible at the current scope called 'comname'. */
616 there_is_a_visible_common_named (char *comname
)
618 SAVED_F77_COMMON_PTR the_common
;
619 struct frame_info
*fi
;
624 error (_("Cannot deal with NULL common name!"));
626 fi
= get_selected_frame (_("No frame selected"));
628 /* The following is generally ripped off from stack.c's routine
629 print_frame_info(). */
631 func
= find_pc_function (fi
->pc
);
634 /* In certain pathological cases, the symtabs give the wrong
635 function (when we are in the first function in a file which
636 is compiled without debugging symbols, the previous function
637 is compiled with debugging symbols, and the "foo.o" symbol
638 that is supposed to tell us where the file with debugging symbols
639 ends has been truncated by ar because it is longer than 15
642 So look in the minimal symbol tables as well, and if it comes
643 up with a larger address for the function use that instead.
644 I don't think this can ever cause any problems; there shouldn't
645 be any minimal symbols in the middle of a function.
646 FIXME: (Not necessarily true. What about text labels?) */
648 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
651 && (SYMBOL_VALUE_ADDRESS (msymbol
)
652 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
653 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
655 funname
= SYMBOL_LINKAGE_NAME (func
);
659 struct minimal_symbol
*msymbol
=
660 lookup_minimal_symbol_by_pc (fi
->pc
);
663 funname
= SYMBOL_LINKAGE_NAME (msymbol
);
666 the_common
= find_common_for_function (comname
, funname
);
668 return (the_common
? 1 : 0);
673 _initialize_f_valprint (void)
675 add_info ("common", info_common_command
,
676 _("Print out the values contained in a Fortran COMMON block."));
678 add_com ("lc", class_info
, info_common_command
,
679 _("Print out the values contained in a Fortran COMMON block."));