author | mr |
Tue, 29 Oct 2019 13:52:04 -0700 | |
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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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typedef enum { |
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NoDetectedVirtualization, |
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XenHVM, |
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KVM, |
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VMWare, |
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HyperV, |
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PowerVM, // on AIX or Linux ppc64(le) |
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PowerFullPartitionMode, // on Linux ppc64(le) |
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PowerKVM |
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} VirtualizationType; |
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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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static unsigned int _data_cache_line_flush_size; |
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static VirtualizationType _detected_virtualization; |
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public: |
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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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static VirtualizationType get_detected_virtualization() { |
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return _detected_virtualization; |
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} |
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// platforms that need to specialize this |
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// define VM_Version::print_platform_virtualization_info() |
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static void print_platform_virtualization_info(outputStream*) { } |
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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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// the size in bytes of a data cache line flushed by a flush |
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// operation which should be a power of two or zero if cache line |
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// writeback is not supported by the current os_cpu combination |
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static unsigned int data_cache_line_flush_size() { |
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return _data_cache_line_flush_size; |
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} |
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// returns true if and only if cache line writeback is supported |
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static bool supports_data_cache_line_flush() { |
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return _data_cache_line_flush_size != 0; |
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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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8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic
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static bool supports_on_spin_wait() { return false; } |
54485
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8219241: Provide basic virtualization related info in the hs_error file on linux/windows x86_64
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186 |
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55105
9ad765641e8f
8223213: Implement fast class initialization checks on x86-64
vlivanov
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187 |
// Does platform support fast class initialization checks for static methods? |
9ad765641e8f
8223213: Implement fast class initialization checks on x86-64
vlivanov
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188 |
static bool supports_fast_class_init_checks() { return false; } |
9ad765641e8f
8223213: Implement fast class initialization checks on x86-64
vlivanov
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189 |
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54485
ddc19ea5059c
8219241: Provide basic virtualization related info in the hs_error file on linux/windows x86_64
mbaesken
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190 |
static bool print_matching_lines_from_file(const char* filename, outputStream* st, const char* keywords_to_match[]); |
1 | 191 |
}; |
7397 | 192 |
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40010 | 193 |
#include CPU_HEADER(vm_version) |
25715
d5a8dbdc5150
8049325: Introduce and clean up umbrella headers for the files in the cpu subdirectories.
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194 |
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53244
9807daeb47c4
8216167: Update include guards to reflect correct directories
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#endif // SHARE_RUNTIME_VM_VERSION_HPP |