author | stuefe |
Fri, 07 Sep 2018 07:52:35 +0200 | |
branch | stuefe-statistical-history |
changeset 57221 | 9653470b7294 |
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/* |
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* Copyright (c) 1997, 2019, 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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#ifndef SHARE_RUNTIME_VM_VERSION_HPP |
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#define SHARE_RUNTIME_VM_VERSION_HPP |
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#include "memory/allocation.hpp" |
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#include "utilities/ostream.hpp" |
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#include "utilities/macros.hpp" |
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// VM_Version provides information about the VM. |
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class Abstract_VM_Version: AllStatic { |
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friend class VMStructs; |
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friend class JVMCIVMStructs; |
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protected: |
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static const char* _s_vm_release; |
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static const char* _s_internal_vm_info_string; |
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// CPU feature flags. |
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static uint64_t _features; |
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static const char* _features_string; |
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// These are set by machine-dependent initializations |
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static bool _supports_cx8; |
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static bool _supports_atomic_getset4; |
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static bool _supports_atomic_getset8; |
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static bool _supports_atomic_getadd4; |
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static bool _supports_atomic_getadd8; |
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static unsigned int _logical_processors_per_package; |
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static unsigned int _L1_data_cache_line_size; |
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static int _vm_major_version; |
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static int _vm_minor_version; |
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static int _vm_security_version; |
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static int _vm_patch_version; |
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static int _vm_build_number; |
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// Called as part of the runtime services initialization which is |
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// called from the management module initialization (via init_globals()) |
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// after argument parsing and attaching of the main thread has |
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// occurred. Examines a variety of the hardware capabilities of |
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// the platform to determine which features can be used to execute the |
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// program. |
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static void initialize() { } |
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// This allows for early initialization of VM_Version information |
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// that may be needed later in the initialization sequence but before |
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// full VM_Version initialization is possible. It can not depend on any |
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// other part of the VM being initialized when called. Platforms that |
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// need to specialize this define VM_Version::early_initialize(). |
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static void early_initialize() { } |
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// Called to initialize VM variables needing initialization |
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// after command line parsing. Platforms that need to specialize |
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// this should define VM_Version::init_before_ergo(). |
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static void init_before_ergo() {} |
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// Name |
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static const char* vm_name(); |
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// Vendor |
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static const char* vm_vendor(); |
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// VM version information string printed by launcher (java -version) |
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static const char* vm_info_string(); |
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static const char* vm_release(); |
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static const char* vm_platform_string(); |
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static const char* vm_build_user(); |
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static int vm_major_version() { return _vm_major_version; } |
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static int vm_minor_version() { return _vm_minor_version; } |
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static int vm_security_version() { return _vm_security_version; } |
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static int vm_patch_version() { return _vm_patch_version; } |
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static int vm_build_number() { return _vm_build_number; } |
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// Gets the jvm_version_info.jvm_version defined in jvm.h |
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static unsigned int jvm_version(); |
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// Internal version providing additional build information |
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static const char* internal_vm_info_string(); |
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static const char* jre_release_version(); |
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static const char* jdk_debug_level(); |
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static const char* printable_jdk_debug_level(); |
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static uint64_t features() { |
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return _features; |
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} |
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static const char* features_string() { |
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return _features_string; |
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} |
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// does HW support an 8-byte compare-exchange operation? |
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static bool supports_cx8() { |
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#ifdef SUPPORTS_NATIVE_CX8 |
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return true; |
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#else |
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return _supports_cx8; |
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#endif |
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} |
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// does HW support atomic get-and-set or atomic get-and-add? Used |
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// to guide intrinsification decisions for Unsafe atomic ops |
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static bool supports_atomic_getset4() {return _supports_atomic_getset4;} |
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static bool supports_atomic_getset8() {return _supports_atomic_getset8;} |
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static bool supports_atomic_getadd4() {return _supports_atomic_getadd4;} |
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static bool supports_atomic_getadd8() {return _supports_atomic_getadd8;} |
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static unsigned int logical_processors_per_package() { |
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return _logical_processors_per_package; |
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} |
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static unsigned int L1_data_cache_line_size() { |
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return _L1_data_cache_line_size; |
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} |
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// ARCH specific policy for the BiasedLocking |
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static bool use_biased_locking() { return true; } |
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// Number of page sizes efficiently supported by the hardware. Most chips now |
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// support two sizes, thus this default implementation. Processor-specific |
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// subclasses should define new versions to hide this one as needed. Note |
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// that the O/S may support more sizes, but at most this many are used. |
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static uint page_size_count() { return 2; } |
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// Denominator for computing default ParallelGCThreads for machines with |
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// a large number of cores. |
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static uint parallel_worker_threads_denominator() { return 8; } |
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// Does this CPU support spin wait instruction? |
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static bool supports_on_spin_wait() { return false; } |
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}; |
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#include CPU_HEADER(vm_version) |
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#endif // SHARE_RUNTIME_VM_VERSION_HPP |