jdk8-mips64-public/hotspot: src/share/vm/runtime/vm

7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
Reviewed-by: kvn, never, jrose

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

     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  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_RUNTIME_VM_VERSION_HPP

    26 #define SHARE_VM_RUNTIME_VM_VERSION_HPP

    28 #include "memory/allocation.hpp"

    29 #include "utilities/ostream.hpp"

    31 // VM_Version provides information about the VM.

    33 class Abstract_VM_Version: AllStatic {

    34  protected:

    35   friend class VMStructs;

    36   static const char*  _s_vm_release;

    37   static const char*  _s_internal_vm_info_string;

    38   // These are set by machine-dependent initializations

    39   static bool         _supports_cx8;

    40   static unsigned int _logical_processors_per_package;

    41   static int          _vm_major_version;

    42   static int          _vm_minor_version;

    43   static int          _vm_build_number;

    44   static bool         _initialized;

    45   static int          _parallel_worker_threads;

    46   static bool         _parallel_worker_threads_initialized;

    47   static int          _reserve_for_allocation_prefetch;

    49   static unsigned int nof_parallel_worker_threads(unsigned int num,

    50                                                   unsigned int dem,

    51                                                   unsigned int switch_pt);

    52  public:

    53   static void initialize();

    55   // Name

    56   static const char* vm_name();

    57   // Vendor

    58   static const char* vm_vendor();

    59   // VM version information string printed by launcher (java -version)

    60   static const char* vm_info_string();

    61   static const char* vm_release();

    62   static const char* vm_platform_string();

    63   static const char* vm_build_user();

    65   static int vm_major_version()               { assert(_initialized, "not initialized"); return _vm_major_version; }

    66   static int vm_minor_version()               { assert(_initialized, "not initialized"); return _vm_minor_version; }

    67   static int vm_build_number()                { assert(_initialized, "not initialized"); return _vm_build_number; }

    69   // Gets the jvm_version_info.jvm_version defined in jvm.h

    70   static unsigned int jvm_version();

    72   // Internal version providing additional build information

    73   static const char* internal_vm_info_string();

    75   // does HW support an 8-byte compare-exchange operation?

    76   static bool supports_cx8()  {return _supports_cx8;}

    77   static unsigned int logical_processors_per_package() {

    78     return _logical_processors_per_package;

    79   }

    81   // Need a space at the end of TLAB for prefetch instructions

    82   // which may fault when accessing memory outside of heap.

    83   static int reserve_for_allocation_prefetch() {

    84     return _reserve_for_allocation_prefetch;

    85   }

    87   // ARCH specific policy for the BiasedLocking

    88   static bool use_biased_locking()  { return true; }

    90   // Number of page sizes efficiently supported by the hardware.  Most chips now

    91   // support two sizes, thus this default implementation.  Processor-specific

    92   // subclasses should define new versions to hide this one as needed.  Note

    93   // that the O/S may support more sizes, but at most this many are used.

    94   static uint page_size_count() { return 2; }

    96   // Returns the number of parallel threads to be used for VM

    97   // work.  If that number has not been calculated, do so and

    98   // save it.  Returns ParallelGCThreads if it is set on the

    99   // command line.

   100   static unsigned int parallel_worker_threads();

   101   // Calculates and returns the number of parallel threads.  May

   102   // be VM version specific.

   103   static unsigned int calc_parallel_worker_threads();

   104 };

   106 #endif // SHARE_VM_RUNTIME_VM_VERSION_HPP

src/share/vm/runtime/vm_version.hpp@b20d64f83668