duke@435: /*
never@2462:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "interpreter/bytecodeStream.hpp"
stefank@2314: #include "interpreter/bytecodes.hpp"
duke@435: 
duke@435: Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) {
duke@435:   assert(!is_last_bytecode(), "should have been checked");
duke@435:   // set next bytecode position
kamg@848:   address bcp = RawBytecodeStream::bcp();
kamg@848:   address end = method()->code_base() + end_bci();
kamg@848:   int l = Bytecodes::raw_special_length_at(bcp, end);
duke@435:   if (l <= 0 || (_bci + l) > _end_bci) {
duke@435:     code = Bytecodes::_illegal;
duke@435:   } else {
duke@435:     _next_bci += l;
duke@435:     assert(_bci < _next_bci, "length must be > 0");
duke@435:     // set attributes
duke@435:     _is_wide = false;
duke@435:     // check for special (uncommon) cases
duke@435:     if (code == Bytecodes::_wide) {
kamg@848:       if (bcp + 1 >= end) {
kamg@848:         code = Bytecodes::_illegal;
kamg@848:       } else {
kamg@848:         code = (Bytecodes::Code)bcp[1];
kamg@848:         _is_wide = true;
kamg@848:       }
duke@435:     }
duke@435:   }
jrose@1920:   _raw_code = code;
duke@435:   return code;
duke@435: }
jrose@1920: 
jrose@1920: #ifdef ASSERT
jrose@1920: void BaseBytecodeStream::assert_raw_index_size(int size) const {
jrose@1920:   if (raw_code() == Bytecodes::_invokedynamic && is_raw()) {
jrose@1920:     // in raw mode, pretend indy is "bJJ__"
jrose@1920:     assert(size == 2, "raw invokedynamic instruction has 2-byte index only");
jrose@1920:   } else {
never@2462:     bytecode().assert_index_size(size, raw_code(), is_wide());
jrose@1920:   }
jrose@1920: }
jrose@1920: 
jrose@1920: void BaseBytecodeStream::assert_raw_stream(bool want_raw) const {
jrose@1920:   if (want_raw) {
jrose@1920:     assert( is_raw(), "this function only works on raw streams");
jrose@1920:   } else {
jrose@1920:     assert(!is_raw(), "this function only works on non-raw streams");
jrose@1920:   }
jrose@1920: }
jrose@1920: #endif //ASSERT