1 /* Support for printing D values for GDB, the GNU debugger. 2 3 Copyright (C) 2008-2023 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "gdbtypes.h" 22 #include "gdbcore.h" 23 #include "d-lang.h" 24 #include "c-lang.h" 25 26 /* Assuming that TYPE is a TYPE_CODE_STRUCT, verify that TYPE is a 27 dynamic array, and then print its value to STREAM. Return zero if 28 TYPE is a dynamic array, non-zero otherwise. */ 29 30 static int 31 dynamic_array_type (struct type *type, 32 LONGEST embedded_offset, CORE_ADDR address, 33 struct ui_file *stream, int recurse, 34 struct value *val, 35 const struct value_print_options *options) 36 { 37 if (type->num_fields () == 2 38 && type->field (0).type ()->code () == TYPE_CODE_INT 39 && strcmp (type->field (0).name (), "length") == 0 40 && strcmp (type->field (1).name (), "ptr") == 0 41 && !value_bits_any_optimized_out (val, 42 TARGET_CHAR_BIT * embedded_offset, 43 TARGET_CHAR_BIT * type->length ())) 44 { 45 CORE_ADDR addr; 46 struct type *elttype; 47 struct type *true_type; 48 struct type *ptr_type; 49 struct value *ival; 50 int length; 51 const gdb_byte *valaddr = value_contents_for_printing (val).data (); 52 53 length = unpack_field_as_long (type, valaddr + embedded_offset, 0); 54 55 ptr_type = type->field (1).type (); 56 elttype = check_typedef (ptr_type->target_type ()); 57 addr = unpack_pointer (ptr_type, 58 valaddr + type->field (1).loc_bitpos () / 8 59 + embedded_offset); 60 true_type = check_typedef (elttype); 61 62 true_type = lookup_array_range_type (true_type, 0, length - 1); 63 ival = value_at (true_type, addr); 64 true_type = value_type (ival); 65 66 d_value_print_inner (ival, stream, recurse + 1, options); 67 return 0; 68 } 69 return 1; 70 } 71 72 /* See d-lang.h. */ 73 74 void 75 d_value_print_inner (struct value *val, struct ui_file *stream, int recurse, 76 const struct value_print_options *options) 77 { 78 int ret; 79 80 struct type *type = check_typedef (value_type (val)); 81 switch (type->code ()) 82 { 83 case TYPE_CODE_STRUCT: 84 ret = dynamic_array_type (type, value_embedded_offset (val), 85 value_address (val), 86 stream, recurse, val, options); 87 if (ret == 0) 88 break; 89 /* Fall through. */ 90 default: 91 c_value_print_inner (val, stream, recurse, options); 92 break; 93 } 94 } 95