Mon, 18 Mar 2013 13:19:06 +0100
8008555: Debugging code in compiled method sometimes leaks memory
Summary: support for strings that have same life-time as code that uses them.
Reviewed-by: kvn, twisti
duke@435 | 1 | /* |
mikael@4153 | 2 | * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_RUNTIME_VM_VERSION_HPP |
stefank@2314 | 26 | #define SHARE_VM_RUNTIME_VM_VERSION_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "memory/allocation.hpp" |
stefank@2314 | 29 | #include "utilities/ostream.hpp" |
stefank@2314 | 30 | |
duke@435 | 31 | // VM_Version provides information about the VM. |
duke@435 | 32 | |
duke@435 | 33 | class Abstract_VM_Version: AllStatic { |
duke@435 | 34 | protected: |
duke@435 | 35 | friend class VMStructs; |
duke@435 | 36 | static const char* _s_vm_release; |
duke@435 | 37 | static const char* _s_internal_vm_info_string; |
duke@435 | 38 | // These are set by machine-dependent initializations |
duke@435 | 39 | static bool _supports_cx8; |
roland@4106 | 40 | static bool _supports_atomic_getset4; |
roland@4106 | 41 | static bool _supports_atomic_getset8; |
roland@4106 | 42 | static bool _supports_atomic_getadd4; |
roland@4106 | 43 | static bool _supports_atomic_getadd8; |
duke@435 | 44 | static unsigned int _logical_processors_per_package; |
duke@435 | 45 | static int _vm_major_version; |
duke@435 | 46 | static int _vm_minor_version; |
duke@435 | 47 | static int _vm_build_number; |
duke@435 | 48 | static bool _initialized; |
jmasa@445 | 49 | static int _parallel_worker_threads; |
jmasa@445 | 50 | static bool _parallel_worker_threads_initialized; |
kvn@3052 | 51 | static int _reserve_for_allocation_prefetch; |
jmasa@445 | 52 | |
jmasa@445 | 53 | static unsigned int nof_parallel_worker_threads(unsigned int num, |
jmasa@445 | 54 | unsigned int dem, |
jmasa@445 | 55 | unsigned int switch_pt); |
duke@435 | 56 | public: |
duke@435 | 57 | static void initialize(); |
duke@435 | 58 | |
duke@435 | 59 | // Name |
duke@435 | 60 | static const char* vm_name(); |
duke@435 | 61 | // Vendor |
duke@435 | 62 | static const char* vm_vendor(); |
duke@435 | 63 | // VM version information string printed by launcher (java -version) |
duke@435 | 64 | static const char* vm_info_string(); |
duke@435 | 65 | static const char* vm_release(); |
duke@435 | 66 | static const char* vm_platform_string(); |
kamg@2515 | 67 | static const char* vm_build_user(); |
duke@435 | 68 | |
duke@435 | 69 | static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; } |
duke@435 | 70 | static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; } |
duke@435 | 71 | static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; } |
duke@435 | 72 | |
duke@435 | 73 | // Gets the jvm_version_info.jvm_version defined in jvm.h |
duke@435 | 74 | static unsigned int jvm_version(); |
duke@435 | 75 | |
duke@435 | 76 | // Internal version providing additional build information |
duke@435 | 77 | static const char* internal_vm_info_string(); |
ohrstrom@3517 | 78 | static const char* jre_release_version(); |
duke@435 | 79 | |
duke@435 | 80 | // does HW support an 8-byte compare-exchange operation? |
duke@435 | 81 | static bool supports_cx8() {return _supports_cx8;} |
roland@4106 | 82 | // does HW support atomic get-and-set or atomic get-and-add? Used |
roland@4106 | 83 | // to guide intrinsification decisions for Unsafe atomic ops |
roland@4106 | 84 | static bool supports_atomic_getset4() {return _supports_atomic_getset4;} |
roland@4106 | 85 | static bool supports_atomic_getset8() {return _supports_atomic_getset8;} |
roland@4106 | 86 | static bool supports_atomic_getadd4() {return _supports_atomic_getadd4;} |
roland@4106 | 87 | static bool supports_atomic_getadd8() {return _supports_atomic_getadd8;} |
roland@4106 | 88 | |
duke@435 | 89 | static unsigned int logical_processors_per_package() { |
duke@435 | 90 | return _logical_processors_per_package; |
duke@435 | 91 | } |
duke@435 | 92 | |
kvn@3052 | 93 | // Need a space at the end of TLAB for prefetch instructions |
kvn@3052 | 94 | // which may fault when accessing memory outside of heap. |
kvn@3052 | 95 | static int reserve_for_allocation_prefetch() { |
kvn@3052 | 96 | return _reserve_for_allocation_prefetch; |
kvn@3052 | 97 | } |
kvn@3052 | 98 | |
bobv@2036 | 99 | // ARCH specific policy for the BiasedLocking |
bobv@2036 | 100 | static bool use_biased_locking() { return true; } |
bobv@2036 | 101 | |
duke@435 | 102 | // Number of page sizes efficiently supported by the hardware. Most chips now |
duke@435 | 103 | // support two sizes, thus this default implementation. Processor-specific |
duke@435 | 104 | // subclasses should define new versions to hide this one as needed. Note |
duke@435 | 105 | // that the O/S may support more sizes, but at most this many are used. |
duke@435 | 106 | static uint page_size_count() { return 2; } |
jmasa@445 | 107 | |
jmasa@445 | 108 | // Returns the number of parallel threads to be used for VM |
jmasa@445 | 109 | // work. If that number has not been calculated, do so and |
jmasa@445 | 110 | // save it. Returns ParallelGCThreads if it is set on the |
jmasa@445 | 111 | // command line. |
jmasa@445 | 112 | static unsigned int parallel_worker_threads(); |
jmasa@445 | 113 | // Calculates and returns the number of parallel threads. May |
jmasa@445 | 114 | // be VM version specific. |
jmasa@445 | 115 | static unsigned int calc_parallel_worker_threads(); |
duke@435 | 116 | }; |
stefank@2314 | 117 | |
stefank@2314 | 118 | #endif // SHARE_VM_RUNTIME_VM_VERSION_HPP |