| 1 | /* Type stack for GDB parser. |
| 2 | |
| 3 | Copyright (C) 1986-2020 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 "type-stack.h" |
| 22 | |
| 23 | #include "gdbtypes.h" |
| 24 | #include "parser-defs.h" |
| 25 | |
| 26 | /* See type-stack.h. */ |
| 27 | |
| 28 | void |
| 29 | type_stack::insert (enum type_pieces tp) |
| 30 | { |
| 31 | union type_stack_elt element; |
| 32 | int slot; |
| 33 | |
| 34 | gdb_assert (tp == tp_pointer || tp == tp_reference |
| 35 | || tp == tp_rvalue_reference || tp == tp_const |
| 36 | || tp == tp_volatile || tp == tp_restrict |
| 37 | || tp == tp_atomic); |
| 38 | |
| 39 | /* If there is anything on the stack (we know it will be a |
| 40 | tp_pointer), insert the qualifier above it. Otherwise, simply |
| 41 | push this on the top of the stack. */ |
| 42 | if (!m_elements.empty () && (tp == tp_const || tp == tp_volatile |
| 43 | || tp == tp_restrict)) |
| 44 | slot = 1; |
| 45 | else |
| 46 | slot = 0; |
| 47 | |
| 48 | element.piece = tp; |
| 49 | insert_into (slot, element); |
| 50 | } |
| 51 | |
| 52 | /* See type-stack.h. */ |
| 53 | |
| 54 | void |
| 55 | type_stack::insert (struct expr_builder *pstate, const char *string) |
| 56 | { |
| 57 | union type_stack_elt element; |
| 58 | int slot; |
| 59 | |
| 60 | /* If there is anything on the stack (we know it will be a |
| 61 | tp_pointer), insert the address space qualifier above it. |
| 62 | Otherwise, simply push this on the top of the stack. */ |
| 63 | if (!m_elements.empty ()) |
| 64 | slot = 1; |
| 65 | else |
| 66 | slot = 0; |
| 67 | |
| 68 | element.piece = tp_space_identifier; |
| 69 | insert_into (slot, element); |
| 70 | element.int_val = address_space_name_to_int (pstate->gdbarch (), |
| 71 | string); |
| 72 | insert_into (slot, element); |
| 73 | } |
| 74 | |
| 75 | /* See type-stack.h. */ |
| 76 | |
| 77 | type_instance_flags |
| 78 | type_stack::follow_type_instance_flags () |
| 79 | { |
| 80 | type_instance_flags flags = 0; |
| 81 | |
| 82 | for (;;) |
| 83 | switch (pop ()) |
| 84 | { |
| 85 | case tp_end: |
| 86 | return flags; |
| 87 | case tp_const: |
| 88 | flags |= TYPE_INSTANCE_FLAG_CONST; |
| 89 | break; |
| 90 | case tp_volatile: |
| 91 | flags |= TYPE_INSTANCE_FLAG_VOLATILE; |
| 92 | break; |
| 93 | case tp_atomic: |
| 94 | flags |= TYPE_INSTANCE_FLAG_ATOMIC; |
| 95 | break; |
| 96 | case tp_restrict: |
| 97 | flags |= TYPE_INSTANCE_FLAG_RESTRICT; |
| 98 | break; |
| 99 | default: |
| 100 | gdb_assert_not_reached ("unrecognized tp_ value in follow_types"); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /* See type-stack.h. */ |
| 105 | |
| 106 | struct type * |
| 107 | type_stack::follow_types (struct type *follow_type) |
| 108 | { |
| 109 | int done = 0; |
| 110 | int make_const = 0; |
| 111 | int make_volatile = 0; |
| 112 | int make_addr_space = 0; |
| 113 | bool make_restrict = false; |
| 114 | bool make_atomic = false; |
| 115 | int array_size; |
| 116 | |
| 117 | while (!done) |
| 118 | switch (pop ()) |
| 119 | { |
| 120 | case tp_end: |
| 121 | done = 1; |
| 122 | goto process_qualifiers; |
| 123 | break; |
| 124 | case tp_const: |
| 125 | make_const = 1; |
| 126 | break; |
| 127 | case tp_volatile: |
| 128 | make_volatile = 1; |
| 129 | break; |
| 130 | case tp_space_identifier: |
| 131 | make_addr_space = pop_int (); |
| 132 | break; |
| 133 | case tp_atomic: |
| 134 | make_atomic = true; |
| 135 | break; |
| 136 | case tp_restrict: |
| 137 | make_restrict = true; |
| 138 | break; |
| 139 | case tp_pointer: |
| 140 | follow_type = lookup_pointer_type (follow_type); |
| 141 | goto process_qualifiers; |
| 142 | case tp_reference: |
| 143 | follow_type = lookup_lvalue_reference_type (follow_type); |
| 144 | goto process_qualifiers; |
| 145 | case tp_rvalue_reference: |
| 146 | follow_type = lookup_rvalue_reference_type (follow_type); |
| 147 | process_qualifiers: |
| 148 | if (make_const) |
| 149 | follow_type = make_cv_type (make_const, |
| 150 | TYPE_VOLATILE (follow_type), |
| 151 | follow_type, 0); |
| 152 | if (make_volatile) |
| 153 | follow_type = make_cv_type (TYPE_CONST (follow_type), |
| 154 | make_volatile, |
| 155 | follow_type, 0); |
| 156 | if (make_addr_space) |
| 157 | follow_type = make_type_with_address_space (follow_type, |
| 158 | make_addr_space); |
| 159 | if (make_restrict) |
| 160 | follow_type = make_restrict_type (follow_type); |
| 161 | if (make_atomic) |
| 162 | follow_type = make_atomic_type (follow_type); |
| 163 | make_const = make_volatile = 0; |
| 164 | make_addr_space = 0; |
| 165 | make_restrict = make_atomic = false; |
| 166 | break; |
| 167 | case tp_array: |
| 168 | array_size = pop_int (); |
| 169 | /* FIXME-type-allocation: need a way to free this type when we are |
| 170 | done with it. */ |
| 171 | follow_type = |
| 172 | lookup_array_range_type (follow_type, |
| 173 | 0, array_size >= 0 ? array_size - 1 : 0); |
| 174 | if (array_size < 0) |
| 175 | TYPE_HIGH_BOUND_KIND (TYPE_INDEX_TYPE (follow_type)) |
| 176 | = PROP_UNDEFINED; |
| 177 | break; |
| 178 | case tp_function: |
| 179 | /* FIXME-type-allocation: need a way to free this type when we are |
| 180 | done with it. */ |
| 181 | follow_type = lookup_function_type (follow_type); |
| 182 | break; |
| 183 | |
| 184 | case tp_function_with_arguments: |
| 185 | { |
| 186 | std::vector<struct type *> *args = pop_typelist (); |
| 187 | |
| 188 | follow_type |
| 189 | = lookup_function_type_with_arguments (follow_type, |
| 190 | args->size (), |
| 191 | args->data ()); |
| 192 | } |
| 193 | break; |
| 194 | |
| 195 | case tp_type_stack: |
| 196 | { |
| 197 | struct type_stack *stack = pop_type_stack (); |
| 198 | follow_type = stack->follow_types (follow_type); |
| 199 | } |
| 200 | break; |
| 201 | default: |
| 202 | gdb_assert_not_reached ("unrecognized tp_ value in follow_types"); |
| 203 | } |
| 204 | return follow_type; |
| 205 | } |