Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/vm_version.hpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_VM_VERSION_HPP |
26 #define SHARE_VM_RUNTIME_VM_VERSION_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "utilities/ostream.hpp" | |
30 | |
0 | 31 // VM_Version provides information about the VM. |
32 | |
33 class Abstract_VM_Version: AllStatic { | |
34 protected: | |
35 friend class VMStructs; | |
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36 static int _vm_properties_initialized_from_file; |
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37 static const char* _s_vm_name; |
0 | 38 static const char* _s_vm_release; |
39 static const char* _s_internal_vm_info_string; | |
40 // These are set by machine-dependent initializations | |
41 static bool _supports_cx8; | |
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42 static bool _supports_atomic_getset4; |
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43 static bool _supports_atomic_getset8; |
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44 static bool _supports_atomic_getadd4; |
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45 static bool _supports_atomic_getadd8; |
0 | 46 static unsigned int _logical_processors_per_package; |
47 static int _vm_major_version; | |
48 static int _vm_minor_version; | |
49 static int _vm_build_number; | |
50 static bool _initialized; | |
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51 static int _parallel_worker_threads; |
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52 static bool _parallel_worker_threads_initialized; |
3854 | 53 static int _reserve_for_allocation_prefetch; |
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54 |
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55 static unsigned int nof_parallel_worker_threads(unsigned int num, |
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56 unsigned int dem, |
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57 unsigned int switch_pt); |
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58 // Reads "name" and "version" properties from vm.properties |
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59 // if it exists as a sibling of libjvm. Default values |
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60 // are returned if they are not available in this file. |
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61 // @param name returns the value of the "name" property |
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62 // @param version returns the value of the "version" property |
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63 // @return number of properties initialized from the file |
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64 static int init_vm_properties(const char*& name, const char*& version); |
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65 |
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66 static const char* init_internal_vm_info_string(); |
0 | 67 public: |
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68 // Called as part of the runtime services initialization which is |
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69 // called from the management module initialization (via init_globals()) |
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70 // after argument parsing and attaching of the main thread has |
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71 // occurred. Examines a variety of the hardware capabilities of |
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72 // the platform to determine which features can be used to execute the |
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73 // program. |
0 | 74 static void initialize(); |
75 | |
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76 // This allows for early initialization of VM_Version information |
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77 // that may be needed later in the initialization sequence but before |
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78 // full VM_Version initialization is possible. It can not depend on any |
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79 // other part of the VM being initialized when called. Platforms that |
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80 // need to specialize this define VM_Version::early_initialize(). |
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81 static void early_initialize() { } |
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82 |
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83 // Called to initialize VM variables needing initialization |
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84 // after command line parsing. Platforms that need to specialize |
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85 // this should define VM_Version::init_before_ergo(). |
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86 static void init_before_ergo() {} |
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87 |
0 | 88 // Name |
89 static const char* vm_name(); | |
90 // Vendor | |
91 static const char* vm_vendor(); | |
92 // VM version information string printed by launcher (java -version) | |
93 static const char* vm_info_string(); | |
94 static const char* vm_release(); | |
95 static const char* vm_platform_string(); | |
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96 static const char* vm_build_user(); |
0 | 97 |
98 static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; } | |
99 static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; } | |
100 static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; } | |
101 | |
102 // Gets the jvm_version_info.jvm_version defined in jvm.h | |
103 static unsigned int jvm_version(); | |
104 | |
105 // Internal version providing additional build information | |
106 static const char* internal_vm_info_string(); | |
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107 static const char* jre_release_version(); |
0 | 108 |
109 // does HW support an 8-byte compare-exchange operation? | |
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110 static bool supports_cx8() { |
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111 #ifdef SUPPORTS_NATIVE_CX8 |
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112 return true; |
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113 #else |
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114 return _supports_cx8; |
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115 #endif |
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116 } |
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117 // does HW support atomic get-and-set or atomic get-and-add? Used |
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118 // to guide intrinsification decisions for Unsafe atomic ops |
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119 static bool supports_atomic_getset4() {return _supports_atomic_getset4;} |
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120 static bool supports_atomic_getset8() {return _supports_atomic_getset8;} |
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121 static bool supports_atomic_getadd4() {return _supports_atomic_getadd4;} |
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122 static bool supports_atomic_getadd8() {return _supports_atomic_getadd8;} |
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123 |
0 | 124 static unsigned int logical_processors_per_package() { |
125 return _logical_processors_per_package; | |
126 } | |
127 | |
3854 | 128 // Need a space at the end of TLAB for prefetch instructions |
129 // which may fault when accessing memory outside of heap. | |
130 static int reserve_for_allocation_prefetch() { | |
131 return _reserve_for_allocation_prefetch; | |
132 } | |
133 | |
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134 // ARCH specific policy for the BiasedLocking |
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135 static bool use_biased_locking() { return true; } |
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136 |
0 | 137 // Number of page sizes efficiently supported by the hardware. Most chips now |
138 // support two sizes, thus this default implementation. Processor-specific | |
139 // subclasses should define new versions to hide this one as needed. Note | |
140 // that the O/S may support more sizes, but at most this many are used. | |
141 static uint page_size_count() { return 2; } | |
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142 |
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143 // Returns the number of parallel threads to be used for VM |
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144 // work. If that number has not been calculated, do so and |
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145 // save it. Returns ParallelGCThreads if it is set on the |
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146 // command line. |
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147 static unsigned int parallel_worker_threads(); |
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148 // Calculates and returns the number of parallel threads. May |
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149 // be VM version specific. |
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150 static unsigned int calc_parallel_worker_threads(); |
0 | 151 }; |
1972 | 152 |
153 #endif // SHARE_VM_RUNTIME_VM_VERSION_HPP |