annotate src/share/vm/runtime/vm_version.hpp @ 4731:1f114331df92

8023730: new hotspot build - hs24-b57 Reviewed-by: jcoomes
author amurillo
date Mon, 26 Aug 2013 12:06:09 -0700
parents c77d473e71f7
children
rev   line source
duke@0 1 /*
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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
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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 *
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duke@0 18 *
trims@1489 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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duke@0 23 */
duke@0 24
stefank@1869 25 #ifndef SHARE_VM_RUNTIME_VM_VERSION_HPP
stefank@1869 26 #define SHARE_VM_RUNTIME_VM_VERSION_HPP
stefank@1869 27
stefank@1869 28 #include "memory/allocation.hpp"
stefank@1869 29 #include "utilities/ostream.hpp"
stefank@1869 30
duke@0 31 // VM_Version provides information about the VM.
duke@0 32
duke@0 33 class Abstract_VM_Version: AllStatic {
duke@0 34 protected:
duke@0 35 friend class VMStructs;
duke@0 36 static const char* _s_vm_release;
duke@0 37 static const char* _s_internal_vm_info_string;
duke@0 38 // These are set by machine-dependent initializations
duke@0 39 static bool _supports_cx8;
roland@3981 40 static bool _supports_atomic_getset4;
roland@3981 41 static bool _supports_atomic_getset8;
roland@3981 42 static bool _supports_atomic_getadd4;
roland@3981 43 static bool _supports_atomic_getadd8;
duke@0 44 static unsigned int _logical_processors_per_package;
duke@0 45 static int _vm_major_version;
duke@0 46 static int _vm_minor_version;
duke@0 47 static int _vm_build_number;
duke@0 48 static bool _initialized;
jmasa@39 49 static int _parallel_worker_threads;
jmasa@39 50 static bool _parallel_worker_threads_initialized;
kvn@2615 51 static int _reserve_for_allocation_prefetch;
jmasa@39 52
jmasa@39 53 static unsigned int nof_parallel_worker_threads(unsigned int num,
jmasa@39 54 unsigned int dem,
jmasa@39 55 unsigned int switch_pt);
duke@0 56 public:
duke@0 57 static void initialize();
duke@0 58
duke@0 59 // Name
duke@0 60 static const char* vm_name();
duke@0 61 // Vendor
duke@0 62 static const char* vm_vendor();
duke@0 63 // VM version information string printed by launcher (java -version)
duke@0 64 static const char* vm_info_string();
duke@0 65 static const char* vm_release();
duke@0 66 static const char* vm_platform_string();
kamg@2094 67 static const char* vm_build_user();
duke@0 68
duke@0 69 static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; }
duke@0 70 static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; }
duke@0 71 static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; }
duke@0 72
duke@0 73 // Gets the jvm_version_info.jvm_version defined in jvm.h
duke@0 74 static unsigned int jvm_version();
duke@0 75
duke@0 76 // Internal version providing additional build information
duke@0 77 static const char* internal_vm_info_string();
ohrstrom@3081 78 static const char* jre_release_version();
duke@0 79
duke@0 80 // does HW support an 8-byte compare-exchange operation?
duke@0 81 static bool supports_cx8() {return _supports_cx8;}
roland@3981 82 // does HW support atomic get-and-set or atomic get-and-add? Used
roland@3981 83 // to guide intrinsification decisions for Unsafe atomic ops
roland@3981 84 static bool supports_atomic_getset4() {return _supports_atomic_getset4;}
roland@3981 85 static bool supports_atomic_getset8() {return _supports_atomic_getset8;}
roland@3981 86 static bool supports_atomic_getadd4() {return _supports_atomic_getadd4;}
roland@3981 87 static bool supports_atomic_getadd8() {return _supports_atomic_getadd8;}
roland@3981 88
duke@0 89 static unsigned int logical_processors_per_package() {
duke@0 90 return _logical_processors_per_package;
duke@0 91 }
duke@0 92
kvn@2615 93 // Need a space at the end of TLAB for prefetch instructions
kvn@2615 94 // which may fault when accessing memory outside of heap.
kvn@2615 95 static int reserve_for_allocation_prefetch() {
kvn@2615 96 return _reserve_for_allocation_prefetch;
kvn@2615 97 }
kvn@2615 98
bobv@1600 99 // ARCH specific policy for the BiasedLocking
bobv@1600 100 static bool use_biased_locking() { return true; }
bobv@1600 101
duke@0 102 // Number of page sizes efficiently supported by the hardware. Most chips now
duke@0 103 // support two sizes, thus this default implementation. Processor-specific
duke@0 104 // subclasses should define new versions to hide this one as needed. Note
duke@0 105 // that the O/S may support more sizes, but at most this many are used.
duke@0 106 static uint page_size_count() { return 2; }
jmasa@39 107
jmasa@39 108 // Returns the number of parallel threads to be used for VM
jmasa@39 109 // work. If that number has not been calculated, do so and
jmasa@39 110 // save it. Returns ParallelGCThreads if it is set on the
jmasa@39 111 // command line.
jmasa@39 112 static unsigned int parallel_worker_threads();
jmasa@39 113 // Calculates and returns the number of parallel threads. May
jmasa@39 114 // be VM version specific.
jmasa@39 115 static unsigned int calc_parallel_worker_threads();
duke@0 116 };
stefank@1869 117
stefank@1869 118 #endif // SHARE_VM_RUNTIME_VM_VERSION_HPP