| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "ci/ciArray.hpp" |
| #include "ci/ciArrayKlass.hpp" |
| #include "ci/ciConstant.hpp" |
| #include "ci/ciKlass.hpp" |
| #include "ci/ciUtilities.hpp" |
| #include "oops/objArrayOop.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/typeArrayOop.hpp" |
| |
| // ciArray |
| // |
| // This class represents an arrayOop in the HotSpot virtual |
| // machine. |
| static BasicType fixup_element_type(BasicType bt) { |
| if (bt == T_ARRAY) return T_OBJECT; |
| if (bt == T_BOOLEAN) return T_BYTE; |
| return bt; |
| } |
| |
| ciConstant ciArray::element_value_impl(BasicType elembt, |
| arrayOop ary, |
| int index) { |
| if (ary == NULL) |
| return ciConstant(); |
| assert(ary->is_array(), ""); |
| if (index < 0 || index >= ary->length()) |
| return ciConstant(); |
| ArrayKlass* ak = (ArrayKlass*) ary->klass(); |
| BasicType abt = ak->element_type(); |
| if (fixup_element_type(elembt) != |
| fixup_element_type(abt)) |
| return ciConstant(); |
| switch (elembt) { |
| case T_ARRAY: |
| case T_OBJECT: |
| { |
| assert(ary->is_objArray(), ""); |
| objArrayOop objary = (objArrayOop) ary; |
| oop elem = objary->obj_at(index); |
| ciEnv* env = CURRENT_ENV; |
| ciObject* box = env->get_object(elem); |
| return ciConstant(T_OBJECT, box); |
| } |
| default: |
| break; |
| } |
| assert(ary->is_typeArray(), ""); |
| typeArrayOop tary = (typeArrayOop) ary; |
| jint value = 0; |
| switch (elembt) { |
| case T_LONG: return ciConstant(tary->long_at(index)); |
| case T_FLOAT: return ciConstant(tary->float_at(index)); |
| case T_DOUBLE: return ciConstant(tary->double_at(index)); |
| default: return ciConstant(); |
| case T_BYTE: value = tary->byte_at(index); break; |
| case T_BOOLEAN: value = tary->byte_at(index) & 1; break; |
| case T_SHORT: value = tary->short_at(index); break; |
| case T_CHAR: value = tary->char_at(index); break; |
| case T_INT: value = tary->int_at(index); break; |
| } |
| return ciConstant(elembt, value); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciArray::element_value |
| // |
| // Current value of an element. |
| // Returns T_ILLEGAL if there is no element at the given index. |
| ciConstant ciArray::element_value(int index) { |
| BasicType elembt = element_basic_type(); |
| GUARDED_VM_ENTRY( |
| return element_value_impl(elembt, get_arrayOop(), index); |
| ) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciArray::element_value_by_offset |
| // |
| // Current value of an element at the specified offset. |
| // Returns T_ILLEGAL if there is no element at the given offset. |
| ciConstant ciArray::element_value_by_offset(intptr_t element_offset) { |
| BasicType elembt = element_basic_type(); |
| intptr_t shift = exact_log2(type2aelembytes(elembt)); |
| intptr_t header = arrayOopDesc::base_offset_in_bytes(elembt); |
| intptr_t index = (element_offset - header) >> shift; |
| intptr_t offset = header + ((intptr_t)index << shift); |
| if (offset != element_offset || index != (jint)index || index < 0 || index >= length()) { |
| return ciConstant(); |
| } |
| return element_value((jint) index); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciArray::print_impl |
| // |
| // Implementation of the print method. |
| void ciArray::print_impl(outputStream* st) { |
| st->print(" length=%d type=", length()); |
| klass()->print(st); |
| } |