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8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t Summary: In graphKit INT operations were generated to access PtrQueue::_index which has type size_t. This is 64 bit on 64-bit machines. No problems occur on little endian machines as long as the index fits into 32 bit, but on big endian machines the upper part is read, which is zero. This leads to unnecessary branches to the slow path in the runtime. Reviewed-by: twisti, johnc Contributed-by: Martin Doerr <martin.doerr@sap.com>
author johnc
date Wed, 24 Apr 2013 14:48:43 -0700
parents b9a9ed0f8eeb
children
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/*
 * Copyright (c) 2003, 2012, 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.
 *
 */

#ifndef CPU_X86_VM_TEMPLATETABLE_X86_64_HPP
#define CPU_X86_VM_TEMPLATETABLE_X86_64_HPP

  static void prepare_invoke(int byte_no,
                             Register method,         // linked method (or i-klass)
                             Register index = noreg,  // itable index, MethodType, etc.
                             Register recv  = noreg,  // if caller wants to see it
                             Register flags = noreg   // if caller wants to test it
                             );
  static void invokevirtual_helper(Register index, Register recv,
                                   Register flags);
  static void volatile_barrier(Assembler::Membar_mask_bits order_constraint);

  // Helpers
  static void index_check(Register array, Register index);
  static void index_check_without_pop(Register array, Register index);

#endif // CPU_X86_VM_TEMPLATETABLE_X86_64_HPP