499 lines
14 KiB
C
499 lines
14 KiB
C
/* Support for printing Fortran values for GDB, the GNU debugger.
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Copyright (C) 1993-2016 Free Software Foundation, Inc.
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Contributed by Motorola. Adapted from the C definitions by Farooq Butt
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(fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "valprint.h"
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#include "language.h"
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#include "f-lang.h"
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#include "frame.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "block.h"
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#include "dictionary.h"
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extern void _initialize_f_valprint (void);
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static void info_common_command (char *, int);
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static void f77_get_dynamic_length_of_aggregate (struct type *);
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int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
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/* Array which holds offsets to be applied to get a row's elements
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for a given array. Array also holds the size of each subarray. */
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int
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f77_get_lowerbound (struct type *type)
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{
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if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
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error (_("Lower bound may not be '*' in F77"));
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return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
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}
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int
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f77_get_upperbound (struct type *type)
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{
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if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
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{
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/* We have an assumed size array on our hands. Assume that
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upper_bound == lower_bound so that we show at least 1 element.
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If the user wants to see more elements, let him manually ask for 'em
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and we'll subscript the array and show him. */
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return f77_get_lowerbound (type);
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}
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return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
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}
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/* Obtain F77 adjustable array dimensions. */
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static void
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f77_get_dynamic_length_of_aggregate (struct type *type)
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{
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int upper_bound = -1;
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int lower_bound = 1;
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/* Recursively go all the way down into a possibly multi-dimensional
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F77 array and get the bounds. For simple arrays, this is pretty
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easy but when the bounds are dynamic, we must be very careful
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to add up all the lengths correctly. Not doing this right
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will lead to horrendous-looking arrays in parameter lists.
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This function also works for strings which behave very
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similarly to arrays. */
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
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|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
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f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
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/* Recursion ends here, start setting up lengths. */
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lower_bound = f77_get_lowerbound (type);
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upper_bound = f77_get_upperbound (type);
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/* Patch in a valid length value. */
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TYPE_LENGTH (type) =
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(upper_bound - lower_bound + 1)
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* TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
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}
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/* Actual function which prints out F77 arrays, Valaddr == address in
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the superior. Address == the address in the inferior. */
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static void
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f77_print_array_1 (int nss, int ndimensions, struct type *type,
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const gdb_byte *valaddr,
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int embedded_offset, CORE_ADDR address,
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struct ui_file *stream, int recurse,
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const struct value *val,
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const struct value_print_options *options,
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int *elts)
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{
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struct type *range_type = TYPE_INDEX_TYPE (check_typedef (type));
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CORE_ADDR addr = address + embedded_offset;
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LONGEST lowerbound, upperbound;
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int i;
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get_discrete_bounds (range_type, &lowerbound, &upperbound);
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if (nss != ndimensions)
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{
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size_t dim_size = TYPE_LENGTH (TYPE_TARGET_TYPE (type));
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size_t offs = 0;
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for (i = lowerbound;
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(i < upperbound + 1 && (*elts) < options->print_max);
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i++)
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{
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struct value *subarray = value_from_contents_and_address
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(TYPE_TARGET_TYPE (type), value_contents_for_printing_const (val)
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+ offs, addr + offs);
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fprintf_filtered (stream, "( ");
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f77_print_array_1 (nss + 1, ndimensions, value_type (subarray),
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value_contents_for_printing (subarray),
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value_embedded_offset (subarray),
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value_address (subarray),
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stream, recurse, subarray, options, elts);
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offs += dim_size;
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fprintf_filtered (stream, ") ");
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}
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if (*elts >= options->print_max && i < upperbound)
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fprintf_filtered (stream, "...");
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}
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else
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{
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for (i = lowerbound; i < upperbound + 1 && (*elts) < options->print_max;
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i++, (*elts)++)
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{
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struct value *elt = value_subscript ((struct value *)val, i);
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val_print (value_type (elt),
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value_contents_for_printing (elt),
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value_embedded_offset (elt),
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value_address (elt), stream, recurse,
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elt, options, current_language);
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if (i != upperbound)
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fprintf_filtered (stream, ", ");
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if ((*elts == options->print_max - 1)
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&& (i != upperbound))
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fprintf_filtered (stream, "...");
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}
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}
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}
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/* This function gets called to print an F77 array, we set up some
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stuff and then immediately call f77_print_array_1(). */
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static void
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f77_print_array (struct type *type, const gdb_byte *valaddr,
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int embedded_offset,
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CORE_ADDR address, struct ui_file *stream,
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int recurse,
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const struct value *val,
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const struct value_print_options *options)
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{
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int ndimensions;
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int elts = 0;
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ndimensions = calc_f77_array_dims (type);
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if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
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error (_("\
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Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
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ndimensions, MAX_FORTRAN_DIMS);
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f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset,
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address, stream, recurse, val, options, &elts);
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}
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/* Decorations for Fortran. */
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static const struct generic_val_print_decorations f_decorations =
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{
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"(",
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",",
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")",
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".TRUE.",
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".FALSE.",
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"VOID",
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"{",
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"}"
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};
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/* See val_print for a description of the various parameters of this
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function; they are identical. */
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void
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f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
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CORE_ADDR address, struct ui_file *stream, int recurse,
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const struct value *original_value,
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const struct value_print_options *options)
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{
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struct gdbarch *gdbarch = get_type_arch (type);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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int printed_field = 0; /* Number of fields printed. */
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struct type *elttype;
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CORE_ADDR addr;
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int index;
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type = check_typedef (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_STRING:
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f77_get_dynamic_length_of_aggregate (type);
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LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
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valaddr + embedded_offset,
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TYPE_LENGTH (type), NULL, 0, options);
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break;
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case TYPE_CODE_ARRAY:
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR)
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{
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fprintf_filtered (stream, "(");
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f77_print_array (type, valaddr, embedded_offset,
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address, stream, recurse, original_value, options);
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fprintf_filtered (stream, ")");
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}
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else
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{
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struct type *ch_type = TYPE_TARGET_TYPE (type);
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f77_get_dynamic_length_of_aggregate (type);
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LA_PRINT_STRING (stream, ch_type,
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valaddr + embedded_offset,
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TYPE_LENGTH (type) / TYPE_LENGTH (ch_type),
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NULL, 0, options);
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}
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break;
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case TYPE_CODE_PTR:
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if (options->format && options->format != 's')
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{
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val_print_scalar_formatted (type, valaddr, embedded_offset,
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original_value, options, 0, stream);
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break;
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}
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else
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{
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int want_space = 0;
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addr = unpack_pointer (type, valaddr + embedded_offset);
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_function_pointer_address (options, gdbarch, addr, stream);
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return;
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}
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if (options->symbol_print)
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want_space = print_address_demangle (options, gdbarch, addr,
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stream, demangle);
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else if (options->addressprint && options->format != 's')
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{
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fputs_filtered (paddress (gdbarch, addr), stream);
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want_space = 1;
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}
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/* For a pointer to char or unsigned char, also print the string
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pointed to, unless pointer is null. */
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if (TYPE_LENGTH (elttype) == 1
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&& TYPE_CODE (elttype) == TYPE_CODE_INT
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&& (options->format == 0 || options->format == 's')
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&& addr != 0)
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{
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if (want_space)
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fputs_filtered (" ", stream);
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val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
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stream, options);
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}
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return;
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}
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break;
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case TYPE_CODE_INT:
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if (options->format || options->output_format)
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{
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struct value_print_options opts = *options;
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opts.format = (options->format ? options->format
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: options->output_format);
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val_print_scalar_formatted (type, valaddr, embedded_offset,
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original_value, &opts, 0, stream);
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}
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else
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{
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val_print_type_code_int (type, valaddr + embedded_offset, stream);
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/* C and C++ has no single byte int type, char is used instead.
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Since we don't know whether the value is really intended to
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be used as an integer or a character, print the character
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equivalent as well. */
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if (TYPE_LENGTH (type) == 1)
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{
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LONGEST c;
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fputs_filtered (" ", stream);
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c = unpack_long (type, valaddr + embedded_offset);
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LA_PRINT_CHAR ((unsigned char) c, type, stream);
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}
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}
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break;
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case TYPE_CODE_STRUCT:
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case TYPE_CODE_UNION:
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/* Starting from the Fortran 90 standard, Fortran supports derived
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types. */
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fprintf_filtered (stream, "( ");
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for (index = 0; index < TYPE_NFIELDS (type); index++)
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{
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struct value *field = value_field
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((struct value *)original_value, index);
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struct type *field_type = check_typedef (TYPE_FIELD_TYPE (type, index));
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if (TYPE_CODE (field_type) != TYPE_CODE_FUNC)
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{
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const char *field_name;
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if (printed_field > 0)
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fputs_filtered (", ", stream);
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field_name = TYPE_FIELD_NAME (type, index);
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if (field_name != NULL)
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{
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fputs_filtered (field_name, stream);
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fputs_filtered (" = ", stream);
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}
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val_print (value_type (field),
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value_contents_for_printing (field),
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value_embedded_offset (field),
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value_address (field), stream, recurse + 1,
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field, options, current_language);
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++printed_field;
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}
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}
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fprintf_filtered (stream, " )");
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break;
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case TYPE_CODE_REF:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_FLAGS:
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case TYPE_CODE_FLT:
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case TYPE_CODE_VOID:
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case TYPE_CODE_ERROR:
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case TYPE_CODE_RANGE:
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_COMPLEX:
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case TYPE_CODE_BOOL:
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case TYPE_CODE_CHAR:
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default:
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generic_val_print (type, valaddr, embedded_offset, address,
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stream, recurse, original_value, options,
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&f_decorations);
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break;
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}
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gdb_flush (stream);
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}
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static void
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info_common_command_for_block (const struct block *block, const char *comname,
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int *any_printed)
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{
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struct block_iterator iter;
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struct symbol *sym;
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const char *name;
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struct value_print_options opts;
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get_user_print_options (&opts);
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ALL_BLOCK_SYMBOLS (block, iter, sym)
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if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
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{
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const struct common_block *common = SYMBOL_VALUE_COMMON_BLOCK (sym);
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size_t index;
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gdb_assert (SYMBOL_CLASS (sym) == LOC_COMMON_BLOCK);
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if (comname && (!SYMBOL_LINKAGE_NAME (sym)
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|| strcmp (comname, SYMBOL_LINKAGE_NAME (sym)) != 0))
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continue;
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if (*any_printed)
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putchar_filtered ('\n');
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else
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*any_printed = 1;
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if (SYMBOL_PRINT_NAME (sym))
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printf_filtered (_("Contents of F77 COMMON block '%s':\n"),
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SYMBOL_PRINT_NAME (sym));
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else
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printf_filtered (_("Contents of blank COMMON block:\n"));
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for (index = 0; index < common->n_entries; index++)
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{
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struct value *val = NULL;
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printf_filtered ("%s = ",
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SYMBOL_PRINT_NAME (common->contents[index]));
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TRY
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{
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val = value_of_variable (common->contents[index], block);
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value_print (val, gdb_stdout, &opts);
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}
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CATCH (except, RETURN_MASK_ERROR)
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{
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printf_filtered ("<error reading variable: %s>", except.message);
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}
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END_CATCH
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putchar_filtered ('\n');
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}
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}
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}
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/* This function is used to print out the values in a given COMMON
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block. It will always use the most local common block of the
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given name. */
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static void
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info_common_command (char *comname, int from_tty)
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{
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struct frame_info *fi;
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const struct block *block;
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int values_printed = 0;
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/* We have been told to display the contents of F77 COMMON
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block supposedly visible in this function. Let us
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first make sure that it is visible and if so, let
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us display its contents. */
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fi = get_selected_frame (_("No frame selected"));
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/* The following is generally ripped off from stack.c's routine
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print_frame_info(). */
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block = get_frame_block (fi, 0);
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if (block == NULL)
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{
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printf_filtered (_("No symbol table info available.\n"));
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return;
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}
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while (block)
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{
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info_common_command_for_block (block, comname, &values_printed);
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/* After handling the function's top-level block, stop. Don't
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continue to its superblock, the block of per-file symbols. */
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if (BLOCK_FUNCTION (block))
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break;
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block = BLOCK_SUPERBLOCK (block);
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}
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if (!values_printed)
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{
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if (comname)
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printf_filtered (_("No common block '%s'.\n"), comname);
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else
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printf_filtered (_("No common blocks.\n"));
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}
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}
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void
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_initialize_f_valprint (void)
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{
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add_info ("common", info_common_command,
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_("Print out the values contained in a Fortran COMMON block."));
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}
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