| /* |
| * 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 |