| /* |
| * Copyright (c) 1997, 2016, 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 "interpreter/bytecodeStream.hpp" |
| #include "interpreter/bytecodes.hpp" |
| |
| Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) { |
| assert(!is_last_bytecode(), "should have been checked"); |
| // set next bytecode position |
| address bcp = RawBytecodeStream::bcp(); |
| address end = method()->code_base() + end_bci(); |
| int len = Bytecodes::raw_special_length_at(bcp, end); |
| // Very large tableswitch or lookupswitch size can cause _next_bci to overflow. |
| if (len <= 0 || (_bci > _end_bci - len) || (_bci - len >= _next_bci)) { |
| code = Bytecodes::_illegal; |
| } else { |
| _next_bci += len; |
| // set attributes |
| _is_wide = false; |
| // check for special (uncommon) cases |
| if (code == Bytecodes::_wide) { |
| if (bcp + 1 >= end) { |
| code = Bytecodes::_illegal; |
| } else { |
| code = (Bytecodes::Code)bcp[1]; |
| _is_wide = true; |
| } |
| } |
| } |
| _raw_code = code; |
| return code; |
| } |
| |
| #ifdef ASSERT |
| void BaseBytecodeStream::assert_raw_index_size(int size) const { |
| if (raw_code() == Bytecodes::_invokedynamic && is_raw()) { |
| // in raw mode, pretend indy is "bJJ__" |
| assert(size == 2, "raw invokedynamic instruction has 2-byte index only"); |
| } else { |
| bytecode().assert_index_size(size, raw_code(), is_wide()); |
| } |
| } |
| |
| void BaseBytecodeStream::assert_raw_stream(bool want_raw) const { |
| if (want_raw) { |
| assert( is_raw(), "this function only works on raw streams"); |
| } else { |
| assert(!is_raw(), "this function only works on non-raw streams"); |
| } |
| } |
| #endif //ASSERT |