diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/hotspot/share/runtime/vm_version.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/hotspot/share/runtime/vm_version.hpp Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,166 @@ +/* + * Copyright (c) 1997, 2016, 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