--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/abstract_vm_version.hpp Mon Nov 18 17:11:06 2019 +0100
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 1997, 2019, 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_RUNTIME_ABSTRACT_VM_VERSION_HPP
+#define SHARE_RUNTIME_ABSTRACT_VM_VERSION_HPP
+
+#include "memory/allocation.hpp" // For declaration of class AllStatic
+#include "utilities/globalDefinitions.hpp"
+
+typedef enum {
+ NoDetectedVirtualization,
+ XenHVM,
+ KVM,
+ VMWare,
+ HyperV,
+ PowerVM, // on AIX or Linux ppc64(le)
+ PowerFullPartitionMode, // on Linux ppc64(le)
+ PowerKVM
+} VirtualizationType;
+
+class outputStream;
+
+// Abstract_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 _data_cache_line_flush_size;
+
+ static VirtualizationType _detected_virtualization;
+
+ 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;
+ }
+
+ static VirtualizationType get_detected_virtualization() {
+ return _detected_virtualization;
+ }
+
+ // platforms that need to specialize this
+ // define VM_Version::print_platform_virtualization_info()
+ static void print_platform_virtualization_info(outputStream*) { }
+
+ // 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;
+ }
+
+ // the size in bytes of a data cache line flushed by a flush
+ // operation which should be a power of two or zero if cache line
+ // writeback is not supported by the current os_cpu combination
+ static unsigned int data_cache_line_flush_size() {
+ return _data_cache_line_flush_size;
+ }
+
+ // returns true if and only if cache line writeback is supported
+ static bool supports_data_cache_line_flush() {
+ return _data_cache_line_flush_size != 0;
+ }
+
+ // 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; }
+
+ // Denominator for computing default ParallelGCThreads for machines with
+ // a large number of cores.
+ static uint parallel_worker_threads_denominator() { return 8; }
+
+ // Does this CPU support spin wait instruction?
+ static bool supports_on_spin_wait() { return false; }
+
+ // Does platform support fast class initialization checks for static methods?
+ static bool supports_fast_class_init_checks() { return false; }
+
+ static bool print_matching_lines_from_file(const char* filename, outputStream* st, const char* keywords_to_match[]);
+};
+
+#endif // SHARE_RUNTIME_ABSTRACT_VM_VERSION_HPP