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