annotate src/share/vm/runtime/vm_version.hpp @ 1601:126ea7725993

6953477: Increase portability and flexibility of building Hotspot Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail. Reviewed-by: phh, never, coleenp, dholmes
author bobv
date Tue, 03 Aug 2010 08:13:38 -0400
parents c18cbe5936b8
children f95d63e2154a
rev   line source
duke@0 1 /*
trims@1472 2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 // VM_Version provides information about the VM.
duke@0 26
duke@0 27 class Abstract_VM_Version: AllStatic {
duke@0 28 protected:
duke@0 29 friend class VMStructs;
duke@0 30 static const char* _s_vm_release;
duke@0 31 static const char* _s_internal_vm_info_string;
duke@0 32 // These are set by machine-dependent initializations
duke@0 33 static bool _supports_cx8;
duke@0 34 static unsigned int _logical_processors_per_package;
duke@0 35 static int _vm_major_version;
duke@0 36 static int _vm_minor_version;
duke@0 37 static int _vm_build_number;
duke@0 38 static bool _initialized;
jmasa@10 39 static int _parallel_worker_threads;
jmasa@10 40 static bool _parallel_worker_threads_initialized;
jmasa@10 41
jmasa@10 42 static unsigned int nof_parallel_worker_threads(unsigned int num,
jmasa@10 43 unsigned int dem,
jmasa@10 44 unsigned int switch_pt);
duke@0 45 public:
duke@0 46 static void initialize();
duke@0 47
duke@0 48 // Name
duke@0 49 static const char* vm_name();
duke@0 50 // Vendor
duke@0 51 static const char* vm_vendor();
duke@0 52 // VM version information string printed by launcher (java -version)
duke@0 53 static const char* vm_info_string();
duke@0 54 static const char* vm_release();
duke@0 55 static const char* vm_platform_string();
duke@0 56
duke@0 57 static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; }
duke@0 58 static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; }
duke@0 59 static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; }
duke@0 60
duke@0 61 // Gets the jvm_version_info.jvm_version defined in jvm.h
duke@0 62 static unsigned int jvm_version();
duke@0 63
duke@0 64 // Internal version providing additional build information
duke@0 65 static const char* internal_vm_info_string();
duke@0 66
duke@0 67 // does HW support an 8-byte compare-exchange operation?
duke@0 68 static bool supports_cx8() {return _supports_cx8;}
duke@0 69 static unsigned int logical_processors_per_package() {
duke@0 70 return _logical_processors_per_package;
duke@0 71 }
duke@0 72
bobv@1601 73 // ARCH specific policy for the BiasedLocking
bobv@1601 74 static bool use_biased_locking() { return true; }
bobv@1601 75
duke@0 76 // Number of page sizes efficiently supported by the hardware. Most chips now
duke@0 77 // support two sizes, thus this default implementation. Processor-specific
duke@0 78 // subclasses should define new versions to hide this one as needed. Note
duke@0 79 // that the O/S may support more sizes, but at most this many are used.
duke@0 80 static uint page_size_count() { return 2; }
jmasa@10 81
jmasa@10 82 // Returns the number of parallel threads to be used for VM
jmasa@10 83 // work. If that number has not been calculated, do so and
jmasa@10 84 // save it. Returns ParallelGCThreads if it is set on the
jmasa@10 85 // command line.
jmasa@10 86 static unsigned int parallel_worker_threads();
jmasa@10 87 // Calculates and returns the number of parallel threads. May
jmasa@10 88 // be VM version specific.
jmasa@10 89 static unsigned int calc_parallel_worker_threads();
duke@0 90 };