74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
/*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "interpreter/bytecodeStream.hpp"
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#include "interpreter/bytecodes.hpp"
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Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) {
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assert(!is_last_bytecode(), "should have been checked");
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// set next bytecode position
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address bcp = RawBytecodeStream::bcp();
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address end = method()->code_base() + end_bci();
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int l = Bytecodes::raw_special_length_at(bcp, end);
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if (l <= 0 || (_bci + l) > _end_bci) {
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code = Bytecodes::_illegal;
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} else {
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_next_bci += l;
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assert(_bci < _next_bci, "length must be > 0");
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// set attributes
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_is_wide = false;
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// check for special (uncommon) cases
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if (code == Bytecodes::_wide) {
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if (bcp + 1 >= end) {
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code = Bytecodes::_illegal;
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} else {
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code = (Bytecodes::Code)bcp[1];
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_is_wide = true;
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}
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}
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}
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_raw_code = code;
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return code;
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}
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#ifdef ASSERT
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void BaseBytecodeStream::assert_raw_index_size(int size) const {
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if (raw_code() == Bytecodes::_invokedynamic && is_raw()) {
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// in raw mode, pretend indy is "bJJ__"
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assert(size == 2, "raw invokedynamic instruction has 2-byte index only");
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} else {
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bytecode().assert_index_size(size, raw_code(), is_wide());
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}
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}
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void BaseBytecodeStream::assert_raw_stream(bool want_raw) const {
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if (want_raw) {
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assert( is_raw(), "this function only works on raw streams");
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} else {
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assert(!is_raw(), "this function only works on non-raw streams");
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}
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}
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#endif //ASSERT
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