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https://sourceware.org/git/binutils-gdb.git
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8945920275
I found a couple of spots that could use scoped_value_mark. One of them is a spot that didn't consider the possibility that value_mark can return NULL. I tend to doubt this can be seen in this context, but nevertheless this is safer. Regression tested on x86-64 Fedora 36.
2031 lines
66 KiB
C
2031 lines
66 KiB
C
/* Fortran language support routines for GDB, the GNU debugger.
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Copyright (C) 1993-2023 Free Software Foundation, Inc.
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Contributed by Motorola. Adapted from the C parser by Farooq Butt
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(fmbutt@engage.sps.mot.com).
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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 "parser-defs.h"
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#include "language.h"
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#include "varobj.h"
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#include "gdbcore.h"
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#include "f-lang.h"
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#include "valprint.h"
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#include "value.h"
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#include "cp-support.h"
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#include "charset.h"
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#include "c-lang.h"
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#include "target-float.h"
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#include "gdbarch.h"
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#include "gdbcmd.h"
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#include "f-array-walker.h"
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#include "f-exp.h"
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#include <math.h>
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/* Whether GDB should repack array slices created by the user. */
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static bool repack_array_slices = false;
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/* Implement 'show fortran repack-array-slices'. */
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static void
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show_repack_array_slices (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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gdb_printf (file, _("Repacking of Fortran array slices is %s.\n"),
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value);
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}
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/* Debugging of Fortran's array slicing. */
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static bool fortran_array_slicing_debug = false;
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/* Implement 'show debug fortran-array-slicing'. */
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static void
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show_fortran_array_slicing_debug (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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gdb_printf (file, _("Debugging of Fortran array slicing is %s.\n"),
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value);
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}
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/* Local functions */
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static value *fortran_prepare_argument (struct expression *exp,
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expr::operation *subexp,
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int arg_num, bool is_internal_call_p,
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struct type *func_type, enum noside noside);
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/* Return the encoding that should be used for the character type
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TYPE. */
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const char *
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f_language::get_encoding (struct type *type)
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{
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const char *encoding;
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switch (type->length ())
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{
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case 1:
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encoding = target_charset (type->arch ());
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break;
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case 4:
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if (type_byte_order (type) == BFD_ENDIAN_BIG)
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encoding = "UTF-32BE";
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else
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encoding = "UTF-32LE";
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break;
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default:
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error (_("unrecognized character type"));
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}
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return encoding;
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}
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/* See language.h. */
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struct value *
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f_language::value_string (struct gdbarch *gdbarch,
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const char *ptr, ssize_t len) const
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{
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struct type *type = language_string_char_type (this, gdbarch);
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return ::value_string (ptr, len, type);
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}
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/* A helper function for the "bound" intrinsics that checks that TYPE
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is an array. LBOUND_P is true for lower bound; this is used for
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the error message, if any. */
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static void
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fortran_require_array (struct type *type, bool lbound_p)
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{
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type = check_typedef (type);
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if (type->code () != TYPE_CODE_ARRAY)
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{
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if (lbound_p)
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error (_("LBOUND can only be applied to arrays"));
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else
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error (_("UBOUND can only be applied to arrays"));
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}
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}
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/* Create an array containing the lower bounds (when LBOUND_P is true) or
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the upper bounds (when LBOUND_P is false) of ARRAY (which must be of
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array type). GDBARCH is the current architecture. */
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static struct value *
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fortran_bounds_all_dims (bool lbound_p,
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struct gdbarch *gdbarch,
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struct value *array)
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{
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type *array_type = check_typedef (array->type ());
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int ndimensions = calc_f77_array_dims (array_type);
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/* Allocate a result value of the correct type. */
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type_allocator alloc (gdbarch);
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struct type *range
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= create_static_range_type (alloc,
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builtin_f_type (gdbarch)->builtin_integer,
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1, ndimensions);
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struct type *elm_type = builtin_f_type (gdbarch)->builtin_integer;
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struct type *result_type = create_array_type (alloc, elm_type, range);
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struct value *result = value::allocate (result_type);
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/* Walk the array dimensions backwards due to the way the array will be
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laid out in memory, the first dimension will be the most inner. */
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LONGEST elm_len = elm_type->length ();
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for (LONGEST dst_offset = elm_len * (ndimensions - 1);
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dst_offset >= 0;
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dst_offset -= elm_len)
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{
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LONGEST b;
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/* Grab the required bound. */
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if (lbound_p)
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b = f77_get_lowerbound (array_type);
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else
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b = f77_get_upperbound (array_type);
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/* And copy the value into the result value. */
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struct value *v = value_from_longest (elm_type, b);
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gdb_assert (dst_offset + v->type ()->length ()
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<= result->type ()->length ());
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gdb_assert (v->type ()->length () == elm_len);
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v->contents_copy (result, dst_offset, 0, elm_len);
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/* Peel another dimension of the array. */
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array_type = array_type->target_type ();
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}
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return result;
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}
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/* Return the lower bound (when LBOUND_P is true) or the upper bound (when
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LBOUND_P is false) for dimension DIM_VAL (which must be an integer) of
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ARRAY (which must be an array). RESULT_TYPE corresponds to the type kind
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the function should be evaluated in. */
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static value *
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fortran_bounds_for_dimension (bool lbound_p, value *array, value *dim_val,
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type* result_type)
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{
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/* Check the requested dimension is valid for this array. */
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type *array_type = check_typedef (array->type ());
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int ndimensions = calc_f77_array_dims (array_type);
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long dim = value_as_long (dim_val);
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if (dim < 1 || dim > ndimensions)
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{
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if (lbound_p)
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error (_("LBOUND dimension must be from 1 to %d"), ndimensions);
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else
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error (_("UBOUND dimension must be from 1 to %d"), ndimensions);
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}
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/* Walk the dimensions backwards, due to the ordering in which arrays are
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laid out the first dimension is the most inner. */
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for (int i = ndimensions - 1; i >= 0; --i)
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{
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/* If this is the requested dimension then we're done. Grab the
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bounds and return. */
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if (i == dim - 1)
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{
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LONGEST b;
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if (lbound_p)
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b = f77_get_lowerbound (array_type);
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else
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b = f77_get_upperbound (array_type);
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return value_from_longest (result_type, b);
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}
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/* Peel off another dimension of the array. */
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array_type = array_type->target_type ();
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}
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gdb_assert_not_reached ("failed to find matching dimension");
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}
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/* Return the number of dimensions for a Fortran array or string. */
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int
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calc_f77_array_dims (struct type *array_type)
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{
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int ndimen = 1;
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struct type *tmp_type;
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if ((array_type->code () == TYPE_CODE_STRING))
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return 1;
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if ((array_type->code () != TYPE_CODE_ARRAY))
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error (_("Can't get dimensions for a non-array type"));
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tmp_type = array_type;
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while ((tmp_type = tmp_type->target_type ()))
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{
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if (tmp_type->code () == TYPE_CODE_ARRAY)
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++ndimen;
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}
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return ndimen;
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}
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/* A class used by FORTRAN_VALUE_SUBARRAY when repacking Fortran array
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slices. This is a base class for two alternative repacking mechanisms,
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one for when repacking from a lazy value, and one for repacking from a
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non-lazy (already loaded) value. */
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class fortran_array_repacker_base_impl
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: public fortran_array_walker_base_impl
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{
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public:
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/* Constructor, DEST is the value we are repacking into. */
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fortran_array_repacker_base_impl (struct value *dest)
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: m_dest (dest),
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m_dest_offset (0)
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{ /* Nothing. */ }
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/* When we start processing the inner most dimension, this is where we
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will be creating values for each element as we load them and then copy
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them into the M_DEST value. Set a value mark so we can free these
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temporary values. */
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void start_dimension (struct type *index_type, LONGEST nelts, bool inner_p)
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{
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if (inner_p)
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{
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gdb_assert (!m_mark.has_value ());
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m_mark.emplace ();
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}
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}
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/* When we finish processing the inner most dimension free all temporary
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value that were created. */
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void finish_dimension (bool inner_p, bool last_p)
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{
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if (inner_p)
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{
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gdb_assert (m_mark.has_value ());
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m_mark.reset ();
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}
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}
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protected:
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/* Copy the contents of array element ELT into M_DEST at the next
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available offset. */
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void copy_element_to_dest (struct value *elt)
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{
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elt->contents_copy (m_dest, m_dest_offset, 0,
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elt->type ()->length ());
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m_dest_offset += elt->type ()->length ();
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}
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/* The value being written to. */
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struct value *m_dest;
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/* The byte offset in M_DEST at which the next element should be
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written. */
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LONGEST m_dest_offset;
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/* Set and reset to handle removing intermediate values from the
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value chain. */
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gdb::optional<scoped_value_mark> m_mark;
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};
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/* A class used by FORTRAN_VALUE_SUBARRAY when repacking Fortran array
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slices. This class is specialised for repacking an array slice from a
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lazy array value, as such it does not require the parent array value to
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be loaded into GDB's memory; the parent value could be huge, while the
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slice could be tiny. */
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class fortran_lazy_array_repacker_impl
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: public fortran_array_repacker_base_impl
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{
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public:
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/* Constructor. TYPE is the type of the slice being loaded from the
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parent value, so this type will correctly reflect the strides required
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to find all of the elements from the parent value. ADDRESS is the
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address in target memory of value matching TYPE, and DEST is the value
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we are repacking into. */
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explicit fortran_lazy_array_repacker_impl (struct type *type,
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CORE_ADDR address,
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struct value *dest)
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: fortran_array_repacker_base_impl (dest),
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m_addr (address)
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{ /* Nothing. */ }
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/* Create a lazy value in target memory representing a single element,
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then load the element into GDB's memory and copy the contents into the
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destination value. */
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void process_element (struct type *elt_type, LONGEST elt_off,
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LONGEST index, bool last_p)
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{
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copy_element_to_dest (value_at_lazy (elt_type, m_addr + elt_off));
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}
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private:
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/* The address in target memory where the parent value starts. */
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CORE_ADDR m_addr;
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};
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/* A class used by FORTRAN_VALUE_SUBARRAY when repacking Fortran array
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slices. This class is specialised for repacking an array slice from a
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previously loaded (non-lazy) array value, as such it fetches the
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element values from the contents of the parent value. */
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class fortran_array_repacker_impl
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: public fortran_array_repacker_base_impl
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{
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public:
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/* Constructor. TYPE is the type for the array slice within the parent
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value, as such it has stride values as required to find the elements
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within the original parent value. ADDRESS is the address in target
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memory of the value matching TYPE. BASE_OFFSET is the offset from
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the start of VAL's content buffer to the start of the object of TYPE,
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VAL is the parent object from which we are loading the value, and
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DEST is the value into which we are repacking. */
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explicit fortran_array_repacker_impl (struct type *type, CORE_ADDR address,
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LONGEST base_offset,
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struct value *val, struct value *dest)
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: fortran_array_repacker_base_impl (dest),
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m_base_offset (base_offset),
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m_val (val)
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{
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gdb_assert (!val->lazy ());
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}
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/* Extract an element of ELT_TYPE at offset (M_BASE_OFFSET + ELT_OFF)
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from the content buffer of M_VAL then copy this extracted value into
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the repacked destination value. */
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void process_element (struct type *elt_type, LONGEST elt_off,
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LONGEST index, bool last_p)
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{
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struct value *elt
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= value_from_component (m_val, elt_type, (elt_off + m_base_offset));
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copy_element_to_dest (elt);
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}
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private:
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/* The offset into the content buffer of M_VAL to the start of the slice
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being extracted. */
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LONGEST m_base_offset;
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/* The parent value from which we are extracting a slice. */
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struct value *m_val;
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};
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/* Evaluate FORTRAN_ASSOCIATED expressions. Both GDBARCH and LANG are
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extracted from the expression being evaluated. POINTER is the required
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first argument to the 'associated' keyword, and TARGET is the optional
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second argument, this will be nullptr if the user only passed one
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argument to their use of 'associated'. */
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static struct value *
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fortran_associated (struct gdbarch *gdbarch, const language_defn *lang,
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struct value *pointer, struct value *target = nullptr)
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{
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struct type *result_type = language_bool_type (lang, gdbarch);
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/* All Fortran pointers should have the associated property, this is
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how we know the pointer is pointing at something or not. */
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struct type *pointer_type = check_typedef (pointer->type ());
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if (TYPE_ASSOCIATED_PROP (pointer_type) == nullptr
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&& pointer_type->code () != TYPE_CODE_PTR)
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error (_("ASSOCIATED can only be applied to pointers"));
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/* Get an address from POINTER. Fortran (or at least gfortran) models
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array pointers as arrays with a dynamic data address, so we need to
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use two approaches here, for real pointers we take the contents of the
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pointer as an address. For non-pointers we take the address of the
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content. */
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CORE_ADDR pointer_addr;
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if (pointer_type->code () == TYPE_CODE_PTR)
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pointer_addr = value_as_address (pointer);
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else
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pointer_addr = pointer->address ();
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/* The single argument case, is POINTER associated with anything? */
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if (target == nullptr)
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{
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bool is_associated = false;
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/* If POINTER is an actual pointer and doesn't have an associated
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property then we need to figure out whether this pointer is
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associated by looking at the value of the pointer itself. We make
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the assumption that a non-associated pointer will be set to 0.
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This is probably true for most targets, but might not be true for
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everyone. */
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if (pointer_type->code () == TYPE_CODE_PTR
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&& TYPE_ASSOCIATED_PROP (pointer_type) == nullptr)
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is_associated = (pointer_addr != 0);
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else
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is_associated = !type_not_associated (pointer_type);
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return value_from_longest (result_type, is_associated ? 1 : 0);
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}
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/* The two argument case, is POINTER associated with TARGET? */
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struct type *target_type = check_typedef (target->type ());
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struct type *pointer_target_type;
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if (pointer_type->code () == TYPE_CODE_PTR)
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pointer_target_type = pointer_type->target_type ();
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else
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pointer_target_type = pointer_type;
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struct type *target_target_type;
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if (target_type->code () == TYPE_CODE_PTR)
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target_target_type = target_type->target_type ();
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else
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target_target_type = target_type;
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if (pointer_target_type->code () != target_target_type->code ()
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|| (pointer_target_type->code () != TYPE_CODE_ARRAY
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&& (pointer_target_type->length ()
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!= target_target_type->length ())))
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error (_("arguments to associated must be of same type and kind"));
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/* If TARGET is not in memory, or the original pointer is specifically
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known to be not associated with anything, then the answer is obviously
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false. Alternatively, if POINTER is an actual pointer and has no
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associated property, then we have to check if its associated by
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looking the value of the pointer itself. We make the assumption that
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a non-associated pointer will be set to 0. This is probably true for
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most targets, but might not be true for everyone. */
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if (target->lval () != lval_memory
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|| type_not_associated (pointer_type)
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|| (TYPE_ASSOCIATED_PROP (pointer_type) == nullptr
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&& pointer_type->code () == TYPE_CODE_PTR
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&& pointer_addr == 0))
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return value_from_longest (result_type, 0);
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/* See the comment for POINTER_ADDR above. */
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CORE_ADDR target_addr;
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if (target_type->code () == TYPE_CODE_PTR)
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target_addr = value_as_address (target);
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else
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target_addr = target->address ();
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/* Wrap the following checks inside a do { ... } while (false) loop so
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that we can use `break' to jump out of the loop. */
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bool is_associated = false;
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do
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{
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/* If the addresses are different then POINTER is definitely not
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pointing at TARGET. */
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if (pointer_addr != target_addr)
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break;
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|
|
/* If POINTER is a real pointer (i.e. not an array pointer, which are
|
|
implemented as arrays with a dynamic content address), then this
|
|
is all the checking that is needed. */
|
|
if (pointer_type->code () == TYPE_CODE_PTR)
|
|
{
|
|
is_associated = true;
|
|
break;
|
|
}
|
|
|
|
/* We have an array pointer. Check the number of dimensions. */
|
|
int pointer_dims = calc_f77_array_dims (pointer_type);
|
|
int target_dims = calc_f77_array_dims (target_type);
|
|
if (pointer_dims != target_dims)
|
|
break;
|
|
|
|
/* Now check that every dimension has the same upper bound, lower
|
|
bound, and stride value. */
|
|
int dim = 0;
|
|
while (dim < pointer_dims)
|
|
{
|
|
LONGEST pointer_lowerbound, pointer_upperbound, pointer_stride;
|
|
LONGEST target_lowerbound, target_upperbound, target_stride;
|
|
|
|
pointer_type = check_typedef (pointer_type);
|
|
target_type = check_typedef (target_type);
|
|
|
|
struct type *pointer_range = pointer_type->index_type ();
|
|
struct type *target_range = target_type->index_type ();
|
|
|
|
if (!get_discrete_bounds (pointer_range, &pointer_lowerbound,
|
|
&pointer_upperbound))
|
|
break;
|
|
|
|
if (!get_discrete_bounds (target_range, &target_lowerbound,
|
|
&target_upperbound))
|
|
break;
|
|
|
|
if (pointer_lowerbound != target_lowerbound
|
|
|| pointer_upperbound != target_upperbound)
|
|
break;
|
|
|
|
/* Figure out the stride (in bits) for both pointer and target.
|
|
If either doesn't have a stride then we take the element size,
|
|
but we need to convert to bits (hence the * 8). */
|
|
pointer_stride = pointer_range->bounds ()->bit_stride ();
|
|
if (pointer_stride == 0)
|
|
pointer_stride
|
|
= type_length_units (check_typedef
|
|
(pointer_type->target_type ())) * 8;
|
|
target_stride = target_range->bounds ()->bit_stride ();
|
|
if (target_stride == 0)
|
|
target_stride
|
|
= type_length_units (check_typedef
|
|
(target_type->target_type ())) * 8;
|
|
if (pointer_stride != target_stride)
|
|
break;
|
|
|
|
++dim;
|
|
}
|
|
|
|
if (dim < pointer_dims)
|
|
break;
|
|
|
|
is_associated = true;
|
|
}
|
|
while (false);
|
|
|
|
return value_from_longest (result_type, is_associated ? 1 : 0);
|
|
}
|
|
|
|
struct value *
|
|
eval_op_f_associated (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
return fortran_associated (exp->gdbarch, exp->language_defn, arg1);
|
|
}
|
|
|
|
struct value *
|
|
eval_op_f_associated (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1,
|
|
struct value *arg2)
|
|
{
|
|
return fortran_associated (exp->gdbarch, exp->language_defn, arg1, arg2);
|
|
}
|
|
|
|
/* Implement FORTRAN_ARRAY_SIZE expression, this corresponds to the 'SIZE'
|
|
keyword. RESULT_TYPE corresponds to the type kind the function should be
|
|
evaluated in, ARRAY is the value that should be an array, though this will
|
|
not have been checked before calling this function. DIM is optional, if
|
|
present then it should be an integer identifying a dimension of the
|
|
array to ask about. As with ARRAY the validity of DIM is not checked
|
|
before calling this function.
|
|
|
|
Return either the total number of elements in ARRAY (when DIM is
|
|
nullptr), or the number of elements in dimension DIM. */
|
|
|
|
static value *
|
|
fortran_array_size (value *array, value *dim_val, type *result_type)
|
|
{
|
|
/* Check that ARRAY is the correct type. */
|
|
struct type *array_type = check_typedef (array->type ());
|
|
if (array_type->code () != TYPE_CODE_ARRAY)
|
|
error (_("SIZE can only be applied to arrays"));
|
|
if (type_not_allocated (array_type) || type_not_associated (array_type))
|
|
error (_("SIZE can only be used on allocated/associated arrays"));
|
|
|
|
int ndimensions = calc_f77_array_dims (array_type);
|
|
int dim = -1;
|
|
LONGEST result = 0;
|
|
|
|
if (dim_val != nullptr)
|
|
{
|
|
if (check_typedef (dim_val->type ())->code () != TYPE_CODE_INT)
|
|
error (_("DIM argument to SIZE must be an integer"));
|
|
dim = (int) value_as_long (dim_val);
|
|
|
|
if (dim < 1 || dim > ndimensions)
|
|
error (_("DIM argument to SIZE must be between 1 and %d"),
|
|
ndimensions);
|
|
}
|
|
|
|
/* Now walk over all the dimensions of the array totalling up the
|
|
elements in each dimension. */
|
|
for (int i = ndimensions - 1; i >= 0; --i)
|
|
{
|
|
/* If this is the requested dimension then we're done. Grab the
|
|
bounds and return. */
|
|
if (i == dim - 1 || dim == -1)
|
|
{
|
|
LONGEST lbound, ubound;
|
|
struct type *range = array_type->index_type ();
|
|
|
|
if (!get_discrete_bounds (range, &lbound, &ubound))
|
|
error (_("failed to find array bounds"));
|
|
|
|
LONGEST dim_size = (ubound - lbound + 1);
|
|
if (result == 0)
|
|
result = dim_size;
|
|
else
|
|
result *= dim_size;
|
|
|
|
if (dim != -1)
|
|
break;
|
|
}
|
|
|
|
/* Peel off another dimension of the array. */
|
|
array_type = array_type->target_type ();
|
|
}
|
|
|
|
return value_from_longest (result_type, result);
|
|
}
|
|
|
|
/* See f-exp.h. */
|
|
|
|
struct value *
|
|
eval_op_f_array_size (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_ARRAY_SIZE);
|
|
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
return fortran_array_size (arg1, nullptr, result_type);
|
|
}
|
|
|
|
/* See f-exp.h. */
|
|
|
|
struct value *
|
|
eval_op_f_array_size (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1,
|
|
struct value *arg2)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_ARRAY_SIZE);
|
|
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
return fortran_array_size (arg1, arg2, result_type);
|
|
}
|
|
|
|
/* See f-exp.h. */
|
|
|
|
value *eval_op_f_array_size (type *expect_type, expression *exp, noside noside,
|
|
exp_opcode opcode, value *arg1, value *arg2,
|
|
type *kind_arg)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_ARRAY_SIZE);
|
|
gdb_assert (kind_arg->code () == TYPE_CODE_INT);
|
|
|
|
return fortran_array_size (arg1, arg2, kind_arg);
|
|
}
|
|
|
|
/* Implement UNOP_FORTRAN_SHAPE expression. Both GDBARCH and LANG are
|
|
extracted from the expression being evaluated. VAL is the value on
|
|
which 'shape' was used, this can be any type.
|
|
|
|
Return an array of integers. If VAL is not an array then the returned
|
|
array should have zero elements. If VAL is an array then the returned
|
|
array should have one element per dimension, with the element
|
|
containing the extent of that dimension from VAL. */
|
|
|
|
static struct value *
|
|
fortran_array_shape (struct gdbarch *gdbarch, const language_defn *lang,
|
|
struct value *val)
|
|
{
|
|
struct type *val_type = check_typedef (val->type ());
|
|
|
|
/* If we are passed an array that is either not allocated, or not
|
|
associated, then this is explicitly not allowed according to the
|
|
Fortran specification. */
|
|
if (val_type->code () == TYPE_CODE_ARRAY
|
|
&& (type_not_associated (val_type) || type_not_allocated (val_type)))
|
|
error (_("The array passed to SHAPE must be allocated or associated"));
|
|
|
|
/* The Fortran specification allows non-array types to be passed to this
|
|
function, in which case we get back an empty array.
|
|
|
|
Calculate the number of dimensions for the resulting array. */
|
|
int ndimensions = 0;
|
|
if (val_type->code () == TYPE_CODE_ARRAY)
|
|
ndimensions = calc_f77_array_dims (val_type);
|
|
|
|
/* Allocate a result value of the correct type. */
|
|
type_allocator alloc (gdbarch);
|
|
struct type *range
|
|
= create_static_range_type (alloc,
|
|
builtin_type (gdbarch)->builtin_int,
|
|
1, ndimensions);
|
|
struct type *elm_type = builtin_f_type (gdbarch)->builtin_integer;
|
|
struct type *result_type = create_array_type (alloc, elm_type, range);
|
|
struct value *result = value::allocate (result_type);
|
|
LONGEST elm_len = elm_type->length ();
|
|
|
|
/* Walk the array dimensions backwards due to the way the array will be
|
|
laid out in memory, the first dimension will be the most inner.
|
|
|
|
If VAL was not an array then ndimensions will be 0, in which case we
|
|
will never go around this loop. */
|
|
for (LONGEST dst_offset = elm_len * (ndimensions - 1);
|
|
dst_offset >= 0;
|
|
dst_offset -= elm_len)
|
|
{
|
|
LONGEST lbound, ubound;
|
|
|
|
if (!get_discrete_bounds (val_type->index_type (), &lbound, &ubound))
|
|
error (_("failed to find array bounds"));
|
|
|
|
LONGEST dim_size = (ubound - lbound + 1);
|
|
|
|
/* And copy the value into the result value. */
|
|
struct value *v = value_from_longest (elm_type, dim_size);
|
|
gdb_assert (dst_offset + v->type ()->length ()
|
|
<= result->type ()->length ());
|
|
gdb_assert (v->type ()->length () == elm_len);
|
|
v->contents_copy (result, dst_offset, 0, elm_len);
|
|
|
|
/* Peel another dimension of the array. */
|
|
val_type = val_type->target_type ();
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* See f-exp.h. */
|
|
|
|
struct value *
|
|
eval_op_f_array_shape (struct type *expect_type, struct expression *exp,
|
|
enum noside noside, enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
gdb_assert (opcode == UNOP_FORTRAN_SHAPE);
|
|
return fortran_array_shape (exp->gdbarch, exp->language_defn, arg1);
|
|
}
|
|
|
|
/* A helper function for UNOP_ABS. */
|
|
|
|
struct value *
|
|
eval_op_f_abs (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
struct type *type = arg1->type ();
|
|
switch (type->code ())
|
|
{
|
|
case TYPE_CODE_FLT:
|
|
{
|
|
double d
|
|
= fabs (target_float_to_host_double (arg1->contents ().data (),
|
|
arg1->type ()));
|
|
return value_from_host_double (type, d);
|
|
}
|
|
case TYPE_CODE_INT:
|
|
{
|
|
LONGEST l = value_as_long (arg1);
|
|
l = llabs (l);
|
|
return value_from_longest (type, l);
|
|
}
|
|
}
|
|
error (_("ABS of type %s not supported"), TYPE_SAFE_NAME (type));
|
|
}
|
|
|
|
/* A helper function for BINOP_MOD. */
|
|
|
|
struct value *
|
|
eval_op_f_mod (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1, struct value *arg2)
|
|
{
|
|
struct type *type = arg1->type ();
|
|
if (type->code () != arg2->type ()->code ())
|
|
error (_("non-matching types for parameters to MOD ()"));
|
|
switch (type->code ())
|
|
{
|
|
case TYPE_CODE_FLT:
|
|
{
|
|
double d1
|
|
= target_float_to_host_double (arg1->contents ().data (),
|
|
arg1->type ());
|
|
double d2
|
|
= target_float_to_host_double (arg2->contents ().data (),
|
|
arg2->type ());
|
|
double d3 = fmod (d1, d2);
|
|
return value_from_host_double (type, d3);
|
|
}
|
|
case TYPE_CODE_INT:
|
|
{
|
|
LONGEST v1 = value_as_long (arg1);
|
|
LONGEST v2 = value_as_long (arg2);
|
|
if (v2 == 0)
|
|
error (_("calling MOD (N, 0) is undefined"));
|
|
LONGEST v3 = v1 - (v1 / v2) * v2;
|
|
return value_from_longest (arg1->type (), v3);
|
|
}
|
|
}
|
|
error (_("MOD of type %s not supported"), TYPE_SAFE_NAME (type));
|
|
}
|
|
|
|
/* A helper function for the different FORTRAN_CEILING overloads. Calculates
|
|
CEILING for ARG1 (a float type) and returns it in the requested kind type
|
|
RESULT_TYPE. */
|
|
|
|
static value *
|
|
fortran_ceil_operation (value *arg1, type *result_type)
|
|
{
|
|
if (arg1->type ()->code () != TYPE_CODE_FLT)
|
|
error (_("argument to CEILING must be of type float"));
|
|
double val = target_float_to_host_double (arg1->contents ().data (),
|
|
arg1->type ());
|
|
val = ceil (val);
|
|
return value_from_longest (result_type, val);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_CEILING. */
|
|
|
|
struct value *
|
|
eval_op_f_ceil (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_CEILING);
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
return fortran_ceil_operation (arg1, result_type);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_CEILING. */
|
|
|
|
value *
|
|
eval_op_f_ceil (type *expect_type, expression *exp, noside noside,
|
|
exp_opcode opcode, value *arg1, type *kind_arg)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_CEILING);
|
|
gdb_assert (kind_arg->code () == TYPE_CODE_INT);
|
|
return fortran_ceil_operation (arg1, kind_arg);
|
|
}
|
|
|
|
/* A helper function for the different FORTRAN_FLOOR overloads. Calculates
|
|
FLOOR for ARG1 (a float type) and returns it in the requested kind type
|
|
RESULT_TYPE. */
|
|
|
|
static value *
|
|
fortran_floor_operation (value *arg1, type *result_type)
|
|
{
|
|
if (arg1->type ()->code () != TYPE_CODE_FLT)
|
|
error (_("argument to FLOOR must be of type float"));
|
|
double val = target_float_to_host_double (arg1->contents ().data (),
|
|
arg1->type ());
|
|
val = floor (val);
|
|
return value_from_longest (result_type, val);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_FLOOR. */
|
|
|
|
struct value *
|
|
eval_op_f_floor (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_FLOOR);
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
return fortran_floor_operation (arg1, result_type);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_FLOOR. */
|
|
|
|
struct value *
|
|
eval_op_f_floor (type *expect_type, expression *exp, noside noside,
|
|
exp_opcode opcode, value *arg1, type *kind_arg)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_FLOOR);
|
|
gdb_assert (kind_arg->code () == TYPE_CODE_INT);
|
|
return fortran_floor_operation (arg1, kind_arg);
|
|
}
|
|
|
|
/* A helper function for BINOP_FORTRAN_MODULO. */
|
|
|
|
struct value *
|
|
eval_op_f_modulo (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1, struct value *arg2)
|
|
{
|
|
struct type *type = arg1->type ();
|
|
if (type->code () != arg2->type ()->code ())
|
|
error (_("non-matching types for parameters to MODULO ()"));
|
|
/* MODULO(A, P) = A - FLOOR (A / P) * P */
|
|
switch (type->code ())
|
|
{
|
|
case TYPE_CODE_INT:
|
|
{
|
|
LONGEST a = value_as_long (arg1);
|
|
LONGEST p = value_as_long (arg2);
|
|
LONGEST result = a - (a / p) * p;
|
|
if (result != 0 && (a < 0) != (p < 0))
|
|
result += p;
|
|
return value_from_longest (arg1->type (), result);
|
|
}
|
|
case TYPE_CODE_FLT:
|
|
{
|
|
double a
|
|
= target_float_to_host_double (arg1->contents ().data (),
|
|
arg1->type ());
|
|
double p
|
|
= target_float_to_host_double (arg2->contents ().data (),
|
|
arg2->type ());
|
|
double result = fmod (a, p);
|
|
if (result != 0 && (a < 0.0) != (p < 0.0))
|
|
result += p;
|
|
return value_from_host_double (type, result);
|
|
}
|
|
}
|
|
error (_("MODULO of type %s not supported"), TYPE_SAFE_NAME (type));
|
|
}
|
|
|
|
/* A helper function for FORTRAN_CMPLX. */
|
|
|
|
value *
|
|
eval_op_f_cmplx (type *expect_type, expression *exp, noside noside,
|
|
exp_opcode opcode, value *arg1)
|
|
{
|
|
gdb_assert (opcode == FORTRAN_CMPLX);
|
|
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_complex;
|
|
|
|
if (arg1->type ()->code () == TYPE_CODE_COMPLEX)
|
|
return value_cast (result_type, arg1);
|
|
else
|
|
return value_literal_complex (arg1,
|
|
value::zero (arg1->type (), not_lval),
|
|
result_type);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_CMPLX. */
|
|
|
|
struct value *
|
|
eval_op_f_cmplx (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1, struct value *arg2)
|
|
{
|
|
if (arg1->type ()->code () == TYPE_CODE_COMPLEX
|
|
|| arg2->type ()->code () == TYPE_CODE_COMPLEX)
|
|
error (_("Types of arguments for CMPLX called with more then one argument "
|
|
"must be REAL or INTEGER"));
|
|
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_complex;
|
|
return value_literal_complex (arg1, arg2, result_type);
|
|
}
|
|
|
|
/* A helper function for FORTRAN_CMPLX. */
|
|
|
|
value *
|
|
eval_op_f_cmplx (type *expect_type, expression *exp, noside noside,
|
|
exp_opcode opcode, value *arg1, value *arg2, type *kind_arg)
|
|
{
|
|
gdb_assert (kind_arg->code () == TYPE_CODE_COMPLEX);
|
|
if (arg1->type ()->code () == TYPE_CODE_COMPLEX
|
|
|| arg2->type ()->code () == TYPE_CODE_COMPLEX)
|
|
error (_("Types of arguments for CMPLX called with more then one argument "
|
|
"must be REAL or INTEGER"));
|
|
|
|
return value_literal_complex (arg1, arg2, kind_arg);
|
|
}
|
|
|
|
/* A helper function for UNOP_FORTRAN_KIND. */
|
|
|
|
struct value *
|
|
eval_op_f_kind (struct type *expect_type, struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode opcode,
|
|
struct value *arg1)
|
|
{
|
|
struct type *type = arg1->type ();
|
|
|
|
switch (type->code ())
|
|
{
|
|
case TYPE_CODE_STRUCT:
|
|
case TYPE_CODE_UNION:
|
|
case TYPE_CODE_MODULE:
|
|
case TYPE_CODE_FUNC:
|
|
error (_("argument to kind must be an intrinsic type"));
|
|
}
|
|
|
|
if (!type->target_type ())
|
|
return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
|
|
type->length ());
|
|
return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
|
|
type->target_type ()->length ());
|
|
}
|
|
|
|
/* A helper function for UNOP_FORTRAN_ALLOCATED. */
|
|
|
|
struct value *
|
|
eval_op_f_allocated (struct type *expect_type, struct expression *exp,
|
|
enum noside noside, enum exp_opcode op,
|
|
struct value *arg1)
|
|
{
|
|
struct type *type = check_typedef (arg1->type ());
|
|
if (type->code () != TYPE_CODE_ARRAY)
|
|
error (_("ALLOCATED can only be applied to arrays"));
|
|
struct type *result_type
|
|
= builtin_f_type (exp->gdbarch)->builtin_logical;
|
|
LONGEST result_value = type_not_allocated (type) ? 0 : 1;
|
|
return value_from_longest (result_type, result_value);
|
|
}
|
|
|
|
/* See f-exp.h. */
|
|
|
|
struct value *
|
|
eval_op_f_rank (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside,
|
|
enum exp_opcode op,
|
|
struct value *arg1)
|
|
{
|
|
gdb_assert (op == UNOP_FORTRAN_RANK);
|
|
|
|
struct type *result_type
|
|
= builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
struct type *type = check_typedef (arg1->type ());
|
|
if (type->code () != TYPE_CODE_ARRAY)
|
|
return value_from_longest (result_type, 0);
|
|
LONGEST ndim = calc_f77_array_dims (type);
|
|
return value_from_longest (result_type, ndim);
|
|
}
|
|
|
|
/* A helper function for UNOP_FORTRAN_LOC. */
|
|
|
|
struct value *
|
|
eval_op_f_loc (struct type *expect_type, struct expression *exp,
|
|
enum noside noside, enum exp_opcode op,
|
|
struct value *arg1)
|
|
{
|
|
struct type *result_type;
|
|
if (gdbarch_ptr_bit (exp->gdbarch) == 16)
|
|
result_type = builtin_f_type (exp->gdbarch)->builtin_integer_s2;
|
|
else if (gdbarch_ptr_bit (exp->gdbarch) == 32)
|
|
result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
else
|
|
result_type = builtin_f_type (exp->gdbarch)->builtin_integer_s8;
|
|
|
|
LONGEST result_value = arg1->address ();
|
|
return value_from_longest (result_type, result_value);
|
|
}
|
|
|
|
namespace expr
|
|
{
|
|
|
|
/* Called from evaluate to perform array indexing, and sub-range
|
|
extraction, for Fortran. As well as arrays this function also
|
|
handles strings as they can be treated like arrays of characters.
|
|
ARRAY is the array or string being accessed. EXP and NOSIDE are as
|
|
for evaluate. */
|
|
|
|
value *
|
|
fortran_undetermined::value_subarray (value *array,
|
|
struct expression *exp,
|
|
enum noside noside)
|
|
{
|
|
type *original_array_type = check_typedef (array->type ());
|
|
bool is_string_p = original_array_type->code () == TYPE_CODE_STRING;
|
|
const std::vector<operation_up> &ops = std::get<1> (m_storage);
|
|
int nargs = ops.size ();
|
|
|
|
/* Perform checks for ARRAY not being available. The somewhat overly
|
|
complex logic here is just to keep backward compatibility with the
|
|
errors that we used to get before FORTRAN_VALUE_SUBARRAY was
|
|
rewritten. Maybe a future task would streamline the error messages we
|
|
get here, and update all the expected test results. */
|
|
if (ops[0]->opcode () != OP_RANGE)
|
|
{
|
|
if (type_not_associated (original_array_type))
|
|
error (_("no such vector element (vector not associated)"));
|
|
else if (type_not_allocated (original_array_type))
|
|
error (_("no such vector element (vector not allocated)"));
|
|
}
|
|
else
|
|
{
|
|
if (type_not_associated (original_array_type))
|
|
error (_("array not associated"));
|
|
else if (type_not_allocated (original_array_type))
|
|
error (_("array not allocated"));
|
|
}
|
|
|
|
/* First check that the number of dimensions in the type we are slicing
|
|
matches the number of arguments we were passed. */
|
|
int ndimensions = calc_f77_array_dims (original_array_type);
|
|
if (nargs != ndimensions)
|
|
error (_("Wrong number of subscripts"));
|
|
|
|
/* This will be initialised below with the type of the elements held in
|
|
ARRAY. */
|
|
struct type *inner_element_type;
|
|
|
|
/* Extract the types of each array dimension from the original array
|
|
type. We need these available so we can fill in the default upper and
|
|
lower bounds if the user requested slice doesn't provide that
|
|
information. Additionally unpacking the dimensions like this gives us
|
|
the inner element type. */
|
|
std::vector<struct type *> dim_types;
|
|
{
|
|
dim_types.reserve (ndimensions);
|
|
struct type *type = original_array_type;
|
|
for (int i = 0; i < ndimensions; ++i)
|
|
{
|
|
dim_types.push_back (type);
|
|
type = type->target_type ();
|
|
}
|
|
/* TYPE is now the inner element type of the array, we start the new
|
|
array slice off as this type, then as we process the requested slice
|
|
(from the user) we wrap new types around this to build up the final
|
|
slice type. */
|
|
inner_element_type = type;
|
|
}
|
|
|
|
/* As we analyse the new slice type we need to understand if the data
|
|
being referenced is contiguous. Do decide this we must track the size
|
|
of an element at each dimension of the new slice array. Initially the
|
|
elements of the inner most dimension of the array are the same inner
|
|
most elements as the original ARRAY. */
|
|
LONGEST slice_element_size = inner_element_type->length ();
|
|
|
|
/* Start off assuming all data is contiguous, this will be set to false
|
|
if access to any dimension results in non-contiguous data. */
|
|
bool is_all_contiguous = true;
|
|
|
|
/* The TOTAL_OFFSET is the distance in bytes from the start of the
|
|
original ARRAY to the start of the new slice. This is calculated as
|
|
we process the information from the user. */
|
|
LONGEST total_offset = 0;
|
|
|
|
/* A structure representing information about each dimension of the
|
|
resulting slice. */
|
|
struct slice_dim
|
|
{
|
|
/* Constructor. */
|
|
slice_dim (LONGEST l, LONGEST h, LONGEST s, struct type *idx)
|
|
: low (l),
|
|
high (h),
|
|
stride (s),
|
|
index (idx)
|
|
{ /* Nothing. */ }
|
|
|
|
/* The low bound for this dimension of the slice. */
|
|
LONGEST low;
|
|
|
|
/* The high bound for this dimension of the slice. */
|
|
LONGEST high;
|
|
|
|
/* The byte stride for this dimension of the slice. */
|
|
LONGEST stride;
|
|
|
|
struct type *index;
|
|
};
|
|
|
|
/* The dimensions of the resulting slice. */
|
|
std::vector<slice_dim> slice_dims;
|
|
|
|
/* Process the incoming arguments. These arguments are in the reverse
|
|
order to the array dimensions, that is the first argument refers to
|
|
the last array dimension. */
|
|
if (fortran_array_slicing_debug)
|
|
debug_printf ("Processing array access:\n");
|
|
for (int i = 0; i < nargs; ++i)
|
|
{
|
|
/* For each dimension of the array the user will have either provided
|
|
a ranged access with optional lower bound, upper bound, and
|
|
stride, or the user will have supplied a single index. */
|
|
struct type *dim_type = dim_types[ndimensions - (i + 1)];
|
|
fortran_range_operation *range_op
|
|
= dynamic_cast<fortran_range_operation *> (ops[i].get ());
|
|
if (range_op != nullptr)
|
|
{
|
|
enum range_flag range_flag = range_op->get_flags ();
|
|
|
|
LONGEST low, high, stride;
|
|
low = high = stride = 0;
|
|
|
|
if ((range_flag & RANGE_LOW_BOUND_DEFAULT) == 0)
|
|
low = value_as_long (range_op->evaluate0 (exp, noside));
|
|
else
|
|
low = f77_get_lowerbound (dim_type);
|
|
if ((range_flag & RANGE_HIGH_BOUND_DEFAULT) == 0)
|
|
high = value_as_long (range_op->evaluate1 (exp, noside));
|
|
else
|
|
high = f77_get_upperbound (dim_type);
|
|
if ((range_flag & RANGE_HAS_STRIDE) == RANGE_HAS_STRIDE)
|
|
stride = value_as_long (range_op->evaluate2 (exp, noside));
|
|
else
|
|
stride = 1;
|
|
|
|
if (stride == 0)
|
|
error (_("stride must not be 0"));
|
|
|
|
/* Get information about this dimension in the original ARRAY. */
|
|
struct type *target_type = dim_type->target_type ();
|
|
struct type *index_type = dim_type->index_type ();
|
|
LONGEST lb = f77_get_lowerbound (dim_type);
|
|
LONGEST ub = f77_get_upperbound (dim_type);
|
|
LONGEST sd = index_type->bit_stride ();
|
|
if (sd == 0)
|
|
sd = target_type->length () * 8;
|
|
|
|
if (fortran_array_slicing_debug)
|
|
{
|
|
debug_printf ("|-> Range access\n");
|
|
std::string str = type_to_string (dim_type);
|
|
debug_printf ("| |-> Type: %s\n", str.c_str ());
|
|
debug_printf ("| |-> Array:\n");
|
|
debug_printf ("| | |-> Low bound: %s\n", plongest (lb));
|
|
debug_printf ("| | |-> High bound: %s\n", plongest (ub));
|
|
debug_printf ("| | |-> Bit stride: %s\n", plongest (sd));
|
|
debug_printf ("| | |-> Byte stride: %s\n", plongest (sd / 8));
|
|
debug_printf ("| | |-> Type size: %s\n",
|
|
pulongest (dim_type->length ()));
|
|
debug_printf ("| | '-> Target type size: %s\n",
|
|
pulongest (target_type->length ()));
|
|
debug_printf ("| |-> Accessing:\n");
|
|
debug_printf ("| | |-> Low bound: %s\n",
|
|
plongest (low));
|
|
debug_printf ("| | |-> High bound: %s\n",
|
|
plongest (high));
|
|
debug_printf ("| | '-> Element stride: %s\n",
|
|
plongest (stride));
|
|
}
|
|
|
|
/* Check the user hasn't asked for something invalid. */
|
|
if (high > ub || low < lb)
|
|
error (_("array subscript out of bounds"));
|
|
|
|
/* Calculate what this dimension of the new slice array will look
|
|
like. OFFSET is the byte offset from the start of the
|
|
previous (more outer) dimension to the start of this
|
|
dimension. E_COUNT is the number of elements in this
|
|
dimension. REMAINDER is the number of elements remaining
|
|
between the last included element and the upper bound. For
|
|
example an access '1:6:2' will include elements 1, 3, 5 and
|
|
have a remainder of 1 (element #6). */
|
|
LONGEST lowest = std::min (low, high);
|
|
LONGEST offset = (sd / 8) * (lowest - lb);
|
|
LONGEST e_count = std::abs (high - low) + 1;
|
|
e_count = (e_count + (std::abs (stride) - 1)) / std::abs (stride);
|
|
LONGEST new_low = 1;
|
|
LONGEST new_high = new_low + e_count - 1;
|
|
LONGEST new_stride = (sd * stride) / 8;
|
|
LONGEST last_elem = low + ((e_count - 1) * stride);
|
|
LONGEST remainder = high - last_elem;
|
|
if (low > high)
|
|
{
|
|
offset += std::abs (remainder) * target_type->length ();
|
|
if (stride > 0)
|
|
error (_("incorrect stride and boundary combination"));
|
|
}
|
|
else if (stride < 0)
|
|
error (_("incorrect stride and boundary combination"));
|
|
|
|
/* Is the data within this dimension contiguous? It is if the
|
|
newly computed stride is the same size as a single element of
|
|
this dimension. */
|
|
bool is_dim_contiguous = (new_stride == slice_element_size);
|
|
is_all_contiguous &= is_dim_contiguous;
|
|
|
|
if (fortran_array_slicing_debug)
|
|
{
|
|
debug_printf ("| '-> Results:\n");
|
|
debug_printf ("| |-> Offset = %s\n", plongest (offset));
|
|
debug_printf ("| |-> Elements = %s\n", plongest (e_count));
|
|
debug_printf ("| |-> Low bound = %s\n", plongest (new_low));
|
|
debug_printf ("| |-> High bound = %s\n",
|
|
plongest (new_high));
|
|
debug_printf ("| |-> Byte stride = %s\n",
|
|
plongest (new_stride));
|
|
debug_printf ("| |-> Last element = %s\n",
|
|
plongest (last_elem));
|
|
debug_printf ("| |-> Remainder = %s\n",
|
|
plongest (remainder));
|
|
debug_printf ("| '-> Contiguous = %s\n",
|
|
(is_dim_contiguous ? "Yes" : "No"));
|
|
}
|
|
|
|
/* Figure out how big (in bytes) an element of this dimension of
|
|
the new array slice will be. */
|
|
slice_element_size = std::abs (new_stride * e_count);
|
|
|
|
slice_dims.emplace_back (new_low, new_high, new_stride,
|
|
index_type);
|
|
|
|
/* Update the total offset. */
|
|
total_offset += offset;
|
|
}
|
|
else
|
|
{
|
|
/* There is a single index for this dimension. */
|
|
LONGEST index
|
|
= value_as_long (ops[i]->evaluate_with_coercion (exp, noside));
|
|
|
|
/* Get information about this dimension in the original ARRAY. */
|
|
struct type *target_type = dim_type->target_type ();
|
|
struct type *index_type = dim_type->index_type ();
|
|
LONGEST lb = f77_get_lowerbound (dim_type);
|
|
LONGEST ub = f77_get_upperbound (dim_type);
|
|
LONGEST sd = index_type->bit_stride () / 8;
|
|
if (sd == 0)
|
|
sd = target_type->length ();
|
|
|
|
if (fortran_array_slicing_debug)
|
|
{
|
|
debug_printf ("|-> Index access\n");
|
|
std::string str = type_to_string (dim_type);
|
|
debug_printf ("| |-> Type: %s\n", str.c_str ());
|
|
debug_printf ("| |-> Array:\n");
|
|
debug_printf ("| | |-> Low bound: %s\n", plongest (lb));
|
|
debug_printf ("| | |-> High bound: %s\n", plongest (ub));
|
|
debug_printf ("| | |-> Byte stride: %s\n", plongest (sd));
|
|
debug_printf ("| | |-> Type size: %s\n",
|
|
pulongest (dim_type->length ()));
|
|
debug_printf ("| | '-> Target type size: %s\n",
|
|
pulongest (target_type->length ()));
|
|
debug_printf ("| '-> Accessing:\n");
|
|
debug_printf ("| '-> Index: %s\n",
|
|
plongest (index));
|
|
}
|
|
|
|
/* If the array has actual content then check the index is in
|
|
bounds. An array without content (an unbound array) doesn't
|
|
have a known upper bound, so don't error check in that
|
|
situation. */
|
|
if (index < lb
|
|
|| (dim_type->index_type ()->bounds ()->high.kind () != PROP_UNDEFINED
|
|
&& index > ub)
|
|
|| (array->lval () != lval_memory
|
|
&& dim_type->index_type ()->bounds ()->high.kind () == PROP_UNDEFINED))
|
|
{
|
|
if (type_not_associated (dim_type))
|
|
error (_("no such vector element (vector not associated)"));
|
|
else if (type_not_allocated (dim_type))
|
|
error (_("no such vector element (vector not allocated)"));
|
|
else
|
|
error (_("no such vector element"));
|
|
}
|
|
|
|
/* Calculate using the type stride, not the target type size. */
|
|
LONGEST offset = sd * (index - lb);
|
|
total_offset += offset;
|
|
}
|
|
}
|
|
|
|
/* Build a type that represents the new array slice in the target memory
|
|
of the original ARRAY, this type makes use of strides to correctly
|
|
find only those elements that are part of the new slice. */
|
|
struct type *array_slice_type = inner_element_type;
|
|
for (const auto &d : slice_dims)
|
|
{
|
|
/* Create the range. */
|
|
dynamic_prop p_low, p_high, p_stride;
|
|
|
|
p_low.set_const_val (d.low);
|
|
p_high.set_const_val (d.high);
|
|
p_stride.set_const_val (d.stride);
|
|
|
|
type_allocator alloc (d.index->target_type ());
|
|
struct type *new_range
|
|
= create_range_type_with_stride (alloc,
|
|
d.index->target_type (),
|
|
&p_low, &p_high, 0, &p_stride,
|
|
true);
|
|
array_slice_type
|
|
= create_array_type (alloc, array_slice_type, new_range);
|
|
}
|
|
|
|
if (fortran_array_slicing_debug)
|
|
{
|
|
debug_printf ("'-> Final result:\n");
|
|
debug_printf (" |-> Type: %s\n",
|
|
type_to_string (array_slice_type).c_str ());
|
|
debug_printf (" |-> Total offset: %s\n",
|
|
plongest (total_offset));
|
|
debug_printf (" |-> Base address: %s\n",
|
|
core_addr_to_string (array->address ()));
|
|
debug_printf (" '-> Contiguous = %s\n",
|
|
(is_all_contiguous ? "Yes" : "No"));
|
|
}
|
|
|
|
/* Should we repack this array slice? */
|
|
if (!is_all_contiguous && (repack_array_slices || is_string_p))
|
|
{
|
|
/* Build a type for the repacked slice. */
|
|
struct type *repacked_array_type = inner_element_type;
|
|
for (const auto &d : slice_dims)
|
|
{
|
|
/* Create the range. */
|
|
dynamic_prop p_low, p_high, p_stride;
|
|
|
|
p_low.set_const_val (d.low);
|
|
p_high.set_const_val (d.high);
|
|
p_stride.set_const_val (repacked_array_type->length ());
|
|
|
|
type_allocator alloc (d.index->target_type ());
|
|
struct type *new_range
|
|
= create_range_type_with_stride (alloc,
|
|
d.index->target_type (),
|
|
&p_low, &p_high, 0, &p_stride,
|
|
true);
|
|
repacked_array_type
|
|
= create_array_type (alloc, repacked_array_type, new_range);
|
|
}
|
|
|
|
/* Now copy the elements from the original ARRAY into the packed
|
|
array value DEST. */
|
|
struct value *dest = value::allocate (repacked_array_type);
|
|
if (array->lazy ()
|
|
|| (total_offset + array_slice_type->length ()
|
|
> check_typedef (array->type ())->length ()))
|
|
{
|
|
fortran_array_walker<fortran_lazy_array_repacker_impl> p
|
|
(array_slice_type, array->address () + total_offset, dest);
|
|
p.walk ();
|
|
}
|
|
else
|
|
{
|
|
fortran_array_walker<fortran_array_repacker_impl> p
|
|
(array_slice_type, array->address () + total_offset,
|
|
total_offset, array, dest);
|
|
p.walk ();
|
|
}
|
|
array = dest;
|
|
}
|
|
else
|
|
{
|
|
if (array->lval () == lval_memory)
|
|
{
|
|
/* If the value we're taking a slice from is not yet loaded, or
|
|
the requested slice is outside the values content range then
|
|
just create a new lazy value pointing at the memory where the
|
|
contents we're looking for exist. */
|
|
if (array->lazy ()
|
|
|| (total_offset + array_slice_type->length ()
|
|
> check_typedef (array->type ())->length ()))
|
|
array = value_at_lazy (array_slice_type,
|
|
array->address () + total_offset);
|
|
else
|
|
array = value_from_contents_and_address
|
|
(array_slice_type, array->contents ().data () + total_offset,
|
|
array->address () + total_offset);
|
|
}
|
|
else if (!array->lazy ())
|
|
array = value_from_component (array, array_slice_type, total_offset);
|
|
else
|
|
error (_("cannot subscript arrays that are not in memory"));
|
|
}
|
|
|
|
return array;
|
|
}
|
|
|
|
value *
|
|
fortran_undetermined::evaluate (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside)
|
|
{
|
|
value *callee = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
|
|
if (noside == EVAL_AVOID_SIDE_EFFECTS
|
|
&& is_dynamic_type (callee->type ()))
|
|
callee = std::get<0> (m_storage)->evaluate (nullptr, exp, EVAL_NORMAL);
|
|
struct type *type = check_typedef (callee->type ());
|
|
enum type_code code = type->code ();
|
|
|
|
if (code == TYPE_CODE_PTR)
|
|
{
|
|
/* Fortran always passes variable to subroutines as pointer.
|
|
So we need to look into its target type to see if it is
|
|
array, string or function. If it is, we need to switch
|
|
to the target value the original one points to. */
|
|
struct type *target_type = check_typedef (type->target_type ());
|
|
|
|
if (target_type->code () == TYPE_CODE_ARRAY
|
|
|| target_type->code () == TYPE_CODE_STRING
|
|
|| target_type->code () == TYPE_CODE_FUNC)
|
|
{
|
|
callee = value_ind (callee);
|
|
type = check_typedef (callee->type ());
|
|
code = type->code ();
|
|
}
|
|
}
|
|
|
|
switch (code)
|
|
{
|
|
case TYPE_CODE_ARRAY:
|
|
case TYPE_CODE_STRING:
|
|
return value_subarray (callee, exp, noside);
|
|
|
|
case TYPE_CODE_PTR:
|
|
case TYPE_CODE_FUNC:
|
|
case TYPE_CODE_INTERNAL_FUNCTION:
|
|
{
|
|
/* It's a function call. Allocate arg vector, including
|
|
space for the function to be called in argvec[0] and a
|
|
termination NULL. */
|
|
const std::vector<operation_up> &actual (std::get<1> (m_storage));
|
|
std::vector<value *> argvec (actual.size ());
|
|
bool is_internal_func = (code == TYPE_CODE_INTERNAL_FUNCTION);
|
|
for (int tem = 0; tem < argvec.size (); tem++)
|
|
argvec[tem] = fortran_prepare_argument (exp, actual[tem].get (),
|
|
tem, is_internal_func,
|
|
callee->type (),
|
|
noside);
|
|
return evaluate_subexp_do_call (exp, noside, callee, argvec,
|
|
nullptr, expect_type);
|
|
}
|
|
|
|
default:
|
|
error (_("Cannot perform substring on this type"));
|
|
}
|
|
}
|
|
|
|
value *
|
|
fortran_bound_1arg::evaluate (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside)
|
|
{
|
|
bool lbound_p = std::get<0> (m_storage) == FORTRAN_LBOUND;
|
|
value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
|
|
fortran_require_array (arg1->type (), lbound_p);
|
|
return fortran_bounds_all_dims (lbound_p, exp->gdbarch, arg1);
|
|
}
|
|
|
|
value *
|
|
fortran_bound_2arg::evaluate (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside)
|
|
{
|
|
bool lbound_p = std::get<0> (m_storage) == FORTRAN_LBOUND;
|
|
value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
|
|
fortran_require_array (arg1->type (), lbound_p);
|
|
|
|
/* User asked for the bounds of a specific dimension of the array. */
|
|
value *arg2 = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
|
|
type *type_arg2 = check_typedef (arg2->type ());
|
|
if (type_arg2->code () != TYPE_CODE_INT)
|
|
{
|
|
if (lbound_p)
|
|
error (_("LBOUND second argument should be an integer"));
|
|
else
|
|
error (_("UBOUND second argument should be an integer"));
|
|
}
|
|
|
|
type *result_type = builtin_f_type (exp->gdbarch)->builtin_integer;
|
|
return fortran_bounds_for_dimension (lbound_p, arg1, arg2, result_type);
|
|
}
|
|
|
|
value *
|
|
fortran_bound_3arg::evaluate (type *expect_type,
|
|
expression *exp,
|
|
noside noside)
|
|
{
|
|
const bool lbound_p = std::get<0> (m_storage) == FORTRAN_LBOUND;
|
|
value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
|
|
fortran_require_array (arg1->type (), lbound_p);
|
|
|
|
/* User asked for the bounds of a specific dimension of the array. */
|
|
value *arg2 = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
|
|
type *type_arg2 = check_typedef (arg2->type ());
|
|
if (type_arg2->code () != TYPE_CODE_INT)
|
|
{
|
|
if (lbound_p)
|
|
error (_("LBOUND second argument should be an integer"));
|
|
else
|
|
error (_("UBOUND second argument should be an integer"));
|
|
}
|
|
|
|
type *kind_arg = std::get<3> (m_storage);
|
|
gdb_assert (kind_arg->code () == TYPE_CODE_INT);
|
|
|
|
return fortran_bounds_for_dimension (lbound_p, arg1, arg2, kind_arg);
|
|
}
|
|
|
|
/* Implement STRUCTOP_STRUCT for Fortran. See operation::evaluate in
|
|
expression.h for argument descriptions. */
|
|
|
|
value *
|
|
fortran_structop_operation::evaluate (struct type *expect_type,
|
|
struct expression *exp,
|
|
enum noside noside)
|
|
{
|
|
value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
|
|
const char *str = std::get<1> (m_storage).c_str ();
|
|
if (noside == EVAL_AVOID_SIDE_EFFECTS)
|
|
{
|
|
struct type *type = lookup_struct_elt_type (arg1->type (), str, 1);
|
|
|
|
if (type != nullptr && is_dynamic_type (type))
|
|
arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, EVAL_NORMAL);
|
|
}
|
|
|
|
value *elt = value_struct_elt (&arg1, {}, str, NULL, "structure");
|
|
|
|
if (noside == EVAL_AVOID_SIDE_EFFECTS)
|
|
{
|
|
struct type *elt_type = elt->type ();
|
|
if (is_dynamic_type (elt_type))
|
|
{
|
|
const gdb_byte *valaddr = elt->contents_for_printing ().data ();
|
|
CORE_ADDR address = elt->address ();
|
|
gdb::array_view<const gdb_byte> view
|
|
= gdb::make_array_view (valaddr, elt_type->length ());
|
|
elt_type = resolve_dynamic_type (elt_type, view, address);
|
|
}
|
|
elt = value::zero (elt_type, elt->lval ());
|
|
}
|
|
|
|
return elt;
|
|
}
|
|
|
|
} /* namespace expr */
|
|
|
|
/* See language.h. */
|
|
|
|
void
|
|
f_language::print_array_index (struct type *index_type, LONGEST index,
|
|
struct ui_file *stream,
|
|
const value_print_options *options) const
|
|
{
|
|
struct value *index_value = value_from_longest (index_type, index);
|
|
|
|
gdb_printf (stream, "(");
|
|
value_print (index_value, stream, options);
|
|
gdb_printf (stream, ") = ");
|
|
}
|
|
|
|
/* See language.h. */
|
|
|
|
void
|
|
f_language::language_arch_info (struct gdbarch *gdbarch,
|
|
struct language_arch_info *lai) const
|
|
{
|
|
const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
|
|
|
|
/* Helper function to allow shorter lines below. */
|
|
auto add = [&] (struct type * t)
|
|
{
|
|
lai->add_primitive_type (t);
|
|
};
|
|
|
|
add (builtin->builtin_character);
|
|
add (builtin->builtin_logical);
|
|
add (builtin->builtin_logical_s1);
|
|
add (builtin->builtin_logical_s2);
|
|
add (builtin->builtin_logical_s8);
|
|
add (builtin->builtin_real);
|
|
add (builtin->builtin_real_s8);
|
|
add (builtin->builtin_real_s16);
|
|
add (builtin->builtin_complex);
|
|
add (builtin->builtin_complex_s8);
|
|
add (builtin->builtin_void);
|
|
|
|
lai->set_string_char_type (builtin->builtin_character);
|
|
lai->set_bool_type (builtin->builtin_logical, "logical");
|
|
}
|
|
|
|
/* See language.h. */
|
|
|
|
unsigned int
|
|
f_language::search_name_hash (const char *name) const
|
|
{
|
|
return cp_search_name_hash (name);
|
|
}
|
|
|
|
/* See language.h. */
|
|
|
|
struct block_symbol
|
|
f_language::lookup_symbol_nonlocal (const char *name,
|
|
const struct block *block,
|
|
const domain_enum domain) const
|
|
{
|
|
return cp_lookup_symbol_nonlocal (this, name, block, domain);
|
|
}
|
|
|
|
/* See language.h. */
|
|
|
|
symbol_name_matcher_ftype *
|
|
f_language::get_symbol_name_matcher_inner
|
|
(const lookup_name_info &lookup_name) const
|
|
{
|
|
return cp_get_symbol_name_matcher (lookup_name);
|
|
}
|
|
|
|
/* Single instance of the Fortran language class. */
|
|
|
|
static f_language f_language_defn;
|
|
|
|
static struct builtin_f_type *
|
|
build_fortran_types (struct gdbarch *gdbarch)
|
|
{
|
|
struct builtin_f_type *builtin_f_type = new struct builtin_f_type;
|
|
|
|
builtin_f_type->builtin_void = builtin_type (gdbarch)->builtin_void;
|
|
|
|
type_allocator alloc (gdbarch);
|
|
|
|
builtin_f_type->builtin_character
|
|
= alloc.new_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT, "character");
|
|
|
|
builtin_f_type->builtin_logical_s1
|
|
= init_boolean_type (alloc, TARGET_CHAR_BIT, 1, "logical*1");
|
|
|
|
builtin_f_type->builtin_logical_s2
|
|
= init_boolean_type (alloc, gdbarch_short_bit (gdbarch), 1, "logical*2");
|
|
|
|
builtin_f_type->builtin_logical
|
|
= init_boolean_type (alloc, gdbarch_int_bit (gdbarch), 1, "logical*4");
|
|
|
|
builtin_f_type->builtin_logical_s8
|
|
= init_boolean_type (alloc, gdbarch_long_long_bit (gdbarch), 1,
|
|
"logical*8");
|
|
|
|
builtin_f_type->builtin_integer_s1
|
|
= init_integer_type (alloc, TARGET_CHAR_BIT, 0, "integer*1");
|
|
|
|
builtin_f_type->builtin_integer_s2
|
|
= init_integer_type (alloc, gdbarch_short_bit (gdbarch), 0, "integer*2");
|
|
|
|
builtin_f_type->builtin_integer
|
|
= init_integer_type (alloc, gdbarch_int_bit (gdbarch), 0, "integer*4");
|
|
|
|
builtin_f_type->builtin_integer_s8
|
|
= init_integer_type (alloc, gdbarch_long_long_bit (gdbarch), 0,
|
|
"integer*8");
|
|
|
|
builtin_f_type->builtin_real
|
|
= init_float_type (alloc, gdbarch_float_bit (gdbarch),
|
|
"real*4", gdbarch_float_format (gdbarch));
|
|
|
|
builtin_f_type->builtin_real_s8
|
|
= init_float_type (alloc, gdbarch_double_bit (gdbarch),
|
|
"real*8", gdbarch_double_format (gdbarch));
|
|
|
|
auto fmt = gdbarch_floatformat_for_type (gdbarch, "real(kind=16)", 128);
|
|
if (fmt != nullptr)
|
|
builtin_f_type->builtin_real_s16
|
|
= init_float_type (alloc, 128, "real*16", fmt);
|
|
else if (gdbarch_long_double_bit (gdbarch) == 128)
|
|
builtin_f_type->builtin_real_s16
|
|
= init_float_type (alloc, gdbarch_long_double_bit (gdbarch),
|
|
"real*16", gdbarch_long_double_format (gdbarch));
|
|
else
|
|
builtin_f_type->builtin_real_s16
|
|
= alloc.new_type (TYPE_CODE_ERROR, 128, "real*16");
|
|
|
|
builtin_f_type->builtin_complex
|
|
= init_complex_type ("complex*4", builtin_f_type->builtin_real);
|
|
|
|
builtin_f_type->builtin_complex_s8
|
|
= init_complex_type ("complex*8", builtin_f_type->builtin_real_s8);
|
|
|
|
if (builtin_f_type->builtin_real_s16->code () == TYPE_CODE_ERROR)
|
|
builtin_f_type->builtin_complex_s16
|
|
= alloc.new_type (TYPE_CODE_ERROR, 256, "complex*16");
|
|
else
|
|
builtin_f_type->builtin_complex_s16
|
|
= init_complex_type ("complex*16", builtin_f_type->builtin_real_s16);
|
|
|
|
return builtin_f_type;
|
|
}
|
|
|
|
static const registry<gdbarch>::key<struct builtin_f_type> f_type_data;
|
|
|
|
const struct builtin_f_type *
|
|
builtin_f_type (struct gdbarch *gdbarch)
|
|
{
|
|
struct builtin_f_type *result = f_type_data.get (gdbarch);
|
|
if (result == nullptr)
|
|
{
|
|
result = build_fortran_types (gdbarch);
|
|
f_type_data.set (gdbarch, result);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Command-list for the "set/show fortran" prefix command. */
|
|
static struct cmd_list_element *set_fortran_list;
|
|
static struct cmd_list_element *show_fortran_list;
|
|
|
|
void _initialize_f_language ();
|
|
void
|
|
_initialize_f_language ()
|
|
{
|
|
add_setshow_prefix_cmd
|
|
("fortran", no_class,
|
|
_("Prefix command for changing Fortran-specific settings."),
|
|
_("Generic command for showing Fortran-specific settings."),
|
|
&set_fortran_list, &show_fortran_list,
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("repack-array-slices", class_vars,
|
|
&repack_array_slices, _("\
|
|
Enable or disable repacking of non-contiguous array slices."), _("\
|
|
Show whether non-contiguous array slices are repacked."), _("\
|
|
When the user requests a slice of a Fortran array then we can either return\n\
|
|
a descriptor that describes the array in place (using the original array data\n\
|
|
in its existing location) or the original data can be repacked (copied) to a\n\
|
|
new location.\n\
|
|
\n\
|
|
When the content of the array slice is contiguous within the original array\n\
|
|
then the result will never be repacked, but when the data for the new array\n\
|
|
is non-contiguous within the original array repacking will only be performed\n\
|
|
when this setting is on."),
|
|
NULL,
|
|
show_repack_array_slices,
|
|
&set_fortran_list, &show_fortran_list);
|
|
|
|
/* Debug Fortran's array slicing logic. */
|
|
add_setshow_boolean_cmd ("fortran-array-slicing", class_maintenance,
|
|
&fortran_array_slicing_debug, _("\
|
|
Set debugging of Fortran array slicing."), _("\
|
|
Show debugging of Fortran array slicing."), _("\
|
|
When on, debugging of Fortran array slicing is enabled."),
|
|
NULL,
|
|
show_fortran_array_slicing_debug,
|
|
&setdebuglist, &showdebuglist);
|
|
}
|
|
|
|
/* Ensures that function argument VALUE is in the appropriate form to
|
|
pass to a Fortran function. Returns a possibly new value that should
|
|
be used instead of VALUE.
|
|
|
|
When IS_ARTIFICIAL is true this indicates an artificial argument,
|
|
e.g. hidden string lengths which the GNU Fortran argument passing
|
|
convention specifies as being passed by value.
|
|
|
|
When IS_ARTIFICIAL is false, the argument is passed by pointer. If the
|
|
value is already in target memory then return a value that is a pointer
|
|
to VALUE. If VALUE is not in memory (e.g. an integer literal), allocate
|
|
space in the target, copy VALUE in, and return a pointer to the in
|
|
memory copy. */
|
|
|
|
static struct value *
|
|
fortran_argument_convert (struct value *value, bool is_artificial)
|
|
{
|
|
if (!is_artificial)
|
|
{
|
|
/* If the value is not in the inferior e.g. registers values,
|
|
convenience variables and user input. */
|
|
if (value->lval () != lval_memory)
|
|
{
|
|
struct type *type = value->type ();
|
|
const int length = type->length ();
|
|
const CORE_ADDR addr
|
|
= value_as_long (value_allocate_space_in_inferior (length));
|
|
write_memory (addr, value->contents ().data (), length);
|
|
struct value *val = value_from_contents_and_address
|
|
(type, value->contents ().data (), addr);
|
|
return value_addr (val);
|
|
}
|
|
else
|
|
return value_addr (value); /* Program variables, e.g. arrays. */
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/* Prepare (and return) an argument value ready for an inferior function
|
|
call to a Fortran function. EXP and POS are the expressions describing
|
|
the argument to prepare. ARG_NUM is the argument number being
|
|
prepared, with 0 being the first argument and so on. FUNC_TYPE is the
|
|
type of the function being called.
|
|
|
|
IS_INTERNAL_CALL_P is true if this is a call to a function of type
|
|
TYPE_CODE_INTERNAL_FUNCTION, otherwise this parameter is false.
|
|
|
|
NOSIDE has its usual meaning for expression parsing (see eval.c).
|
|
|
|
Arguments in Fortran are normally passed by address, we coerce the
|
|
arguments here rather than in value_arg_coerce as otherwise the call to
|
|
malloc (to place the non-lvalue parameters in target memory) is hit by
|
|
this Fortran specific logic. This results in malloc being called with a
|
|
pointer to an integer followed by an attempt to malloc the arguments to
|
|
malloc in target memory. Infinite recursion ensues. */
|
|
|
|
static value *
|
|
fortran_prepare_argument (struct expression *exp,
|
|
expr::operation *subexp,
|
|
int arg_num, bool is_internal_call_p,
|
|
struct type *func_type, enum noside noside)
|
|
{
|
|
if (is_internal_call_p)
|
|
return subexp->evaluate_with_coercion (exp, noside);
|
|
|
|
bool is_artificial = ((arg_num >= func_type->num_fields ())
|
|
? true
|
|
: TYPE_FIELD_ARTIFICIAL (func_type, arg_num));
|
|
|
|
/* If this is an artificial argument, then either, this is an argument
|
|
beyond the end of the known arguments, or possibly, there are no known
|
|
arguments (maybe missing debug info).
|
|
|
|
For these artificial arguments, if the user has prefixed it with '&'
|
|
(for address-of), then lets always allow this to succeed, even if the
|
|
argument is not actually in inferior memory. This will allow the user
|
|
to pass arguments to a Fortran function even when there's no debug
|
|
information.
|
|
|
|
As we already pass the address of non-artificial arguments, all we
|
|
need to do if skip the UNOP_ADDR operator in the expression and mark
|
|
the argument as non-artificial. */
|
|
if (is_artificial)
|
|
{
|
|
expr::unop_addr_operation *addrop
|
|
= dynamic_cast<expr::unop_addr_operation *> (subexp);
|
|
if (addrop != nullptr)
|
|
{
|
|
subexp = addrop->get_expression ().get ();
|
|
is_artificial = false;
|
|
}
|
|
}
|
|
|
|
struct value *arg_val = subexp->evaluate_with_coercion (exp, noside);
|
|
return fortran_argument_convert (arg_val, is_artificial);
|
|
}
|
|
|
|
/* See f-lang.h. */
|
|
|
|
struct type *
|
|
fortran_preserve_arg_pointer (struct value *arg, struct type *type)
|
|
{
|
|
if (arg->type ()->code () == TYPE_CODE_PTR)
|
|
return arg->type ();
|
|
return type;
|
|
}
|
|
|
|
/* See f-lang.h. */
|
|
|
|
CORE_ADDR
|
|
fortran_adjust_dynamic_array_base_address_hack (struct type *type,
|
|
CORE_ADDR address)
|
|
{
|
|
gdb_assert (type->code () == TYPE_CODE_ARRAY);
|
|
|
|
/* We can't adjust the base address for arrays that have no content. */
|
|
if (type_not_allocated (type) || type_not_associated (type))
|
|
return address;
|
|
|
|
int ndimensions = calc_f77_array_dims (type);
|
|
LONGEST total_offset = 0;
|
|
|
|
/* Walk through each of the dimensions of this array type and figure out
|
|
if any of the dimensions are "backwards", that is the base address
|
|
for this dimension points to the element at the highest memory
|
|
address and the stride is negative. */
|
|
struct type *tmp_type = type;
|
|
for (int i = 0 ; i < ndimensions; ++i)
|
|
{
|
|
/* Grab the range for this dimension and extract the lower and upper
|
|
bounds. */
|
|
tmp_type = check_typedef (tmp_type);
|
|
struct type *range_type = tmp_type->index_type ();
|
|
LONGEST lowerbound, upperbound, stride;
|
|
if (!get_discrete_bounds (range_type, &lowerbound, &upperbound))
|
|
error ("failed to get range bounds");
|
|
|
|
/* Figure out the stride for this dimension. */
|
|
struct type *elt_type = check_typedef (tmp_type->target_type ());
|
|
stride = tmp_type->index_type ()->bounds ()->bit_stride ();
|
|
if (stride == 0)
|
|
stride = type_length_units (elt_type);
|
|
else
|
|
{
|
|
int unit_size
|
|
= gdbarch_addressable_memory_unit_size (elt_type->arch ());
|
|
stride /= (unit_size * 8);
|
|
}
|
|
|
|
/* If this dimension is "backward" then figure out the offset
|
|
adjustment required to point to the element at the lowest memory
|
|
address, and add this to the total offset. */
|
|
LONGEST offset = 0;
|
|
if (stride < 0 && lowerbound < upperbound)
|
|
offset = (upperbound - lowerbound) * stride;
|
|
total_offset += offset;
|
|
tmp_type = tmp_type->target_type ();
|
|
}
|
|
|
|
/* Adjust the address of this object and return it. */
|
|
address += total_offset;
|
|
return address;
|
|
}
|