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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 91bf0bdae37b
children de6a9e811145
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/*
 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2007, 2008, 2010 Red Hat, Inc.
 * 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 OS_CPU_LINUX_ZERO_VM_GLOBALS_LINUX_ZERO_HPP
#define OS_CPU_LINUX_ZERO_VM_GLOBALS_LINUX_ZERO_HPP

//
// Set the default values for platform dependent flags used by the
// runtime system.  See globals.hpp for details of what they do.
//

define_pd_global(bool,  DontYieldALot,           false);
define_pd_global(intx,  ThreadStackSize,         1536);
#ifdef _LP64
define_pd_global(intx,  VMThreadStackSize,       1024);
#else
define_pd_global(intx,  VMThreadStackSize,       512);
#endif // _LP64
define_pd_global(intx,  CompilerThreadStackSize, 0);
define_pd_global(uintx, JVMInvokeMethodSlack,    8192);

// Used on 64 bit platforms for UseCompressedOops base address
define_pd_global(uintx, HeapBaseMinAddress,      2*G);

#endif // OS_CPU_LINUX_ZERO_VM_GLOBALS_LINUX_ZERO_HPP