/*

 * Copyright (c) 1998, 2015, 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.

 *

 */

#include "precompiled.hpp"

#include "memory/universe.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/arguments.hpp"

#include "runtime/vm_version.hpp"

const char* Abstract_VM_Version::_s_vm_release = Abstract_VM_Version::vm_release();

const char* Abstract_VM_Version::_s_internal_vm_info_string = Abstract_VM_Version::internal_vm_info_string();

bool Abstract_VM_Version::_supports_cx8 = false;

bool Abstract_VM_Version::_supports_atomic_getset4 = false;

bool Abstract_VM_Version::_supports_atomic_getset8 = false;

bool Abstract_VM_Version::_supports_atomic_getadd4 = false;

bool Abstract_VM_Version::_supports_atomic_getadd8 = false;

unsigned int Abstract_VM_Version::_logical_processors_per_package = 1U;

unsigned int Abstract_VM_Version::_L1_data_cache_line_size = 0;

int Abstract_VM_Version::_reserve_for_allocation_prefetch = 0;

#ifndef HOTSPOT_RELEASE_VERSION

  #error HOTSPOT_RELEASE_VERSION must be defined

#endif

#ifndef JDK_MAJOR_VERSION

  #error JDK_MAJOR_VERSION must be defined

#endif

#ifndef JDK_MINOR_VERSION

  #error JDK_MINOR_VERSION must be defined

#endif

#ifndef JDK_MICRO_VERSION

  #error JDK_MICRO_VERSION must be defined

#endif

#ifndef JDK_BUILD_NUMBER

  #error JDK_BUILD_NUMBER must be defined

#endif

#ifndef JRE_RELEASE_VERSION

  #error JRE_RELEASE_VERSION must be defined

#endif

// NOTE: Builds within Visual Studio do not define the build target in

//       HOTSPOT_RELEASE_VERSION, so it must be done here

#if defined(VISUAL_STUDIO_BUILD) && !defined(PRODUCT)

  #ifndef HOTSPOT_BUILD_TARGET

    #error HOTSPOT_BUILD_TARGET must be defined

  #endif

  #define VM_RELEASE HOTSPOT_RELEASE_VERSION "-" HOTSPOT_BUILD_TARGET

#else

  #define VM_RELEASE HOTSPOT_RELEASE_VERSION

#endif

// HOTSPOT_RELEASE_VERSION follows the JDK release version naming convention

// <major_ver>.<minor_ver>.<micro_ver>[-<identifier>][-<debug_target>][-b<nn>]

int Abstract_VM_Version::_vm_major_version = 0;

int Abstract_VM_Version::_vm_minor_version = 0;

int Abstract_VM_Version::_vm_micro_version = 0;

int Abstract_VM_Version::_vm_build_number = 0;

bool Abstract_VM_Version::_initialized = false;

unsigned int Abstract_VM_Version::_parallel_worker_threads = 0;

bool Abstract_VM_Version::_parallel_worker_threads_initialized = false;

#ifdef ASSERT

static void assert_digits(const char * s, const char * message) {

  for (int i = 0; s[i] != '\0'; i++) {

    assert(isdigit(s[i]), message);

  }

}

#endif

static void set_version_field(int * version_field, const char * version_str,

                              const char * const assert_msg) {

  if (version_str != NULL && *version_str != '\0') {

    DEBUG_ONLY(assert_digits(version_str, assert_msg));

    *version_field = atoi(version_str);

  }

}

void Abstract_VM_Version::initialize() {

  if (_initialized) {

    return;

  }

  set_version_field(&_vm_major_version, JDK_MAJOR_VERSION, "bad major version");

  set_version_field(&_vm_minor_version, JDK_MINOR_VERSION, "bad minor version");

  set_version_field(&_vm_micro_version, JDK_MICRO_VERSION, "bad micro version");

  int offset = (JDK_BUILD_NUMBER != NULL && JDK_BUILD_NUMBER[0] == 'b') ? 1 : 0;

  set_version_field(&_vm_build_number, &JDK_BUILD_NUMBER[offset],

                    "bad build number");

  _initialized = true;

}

#if defined(_LP64)

  #define VMLP "64-Bit "

#else

  #define VMLP ""

#endif

#ifndef VMTYPE

  #ifdef TIERED

    #define VMTYPE "Server"

  #else // TIERED

  #ifdef ZERO

  #ifdef SHARK

    #define VMTYPE "Shark"

  #else // SHARK

    #define VMTYPE "Zero"

  #endif // SHARK

  #else // ZERO

     #define VMTYPE COMPILER1_PRESENT("Client")   \

                    COMPILER2_PRESENT("Server")

  #endif // ZERO

  #endif // TIERED

#endif

#ifndef HOTSPOT_VM_DISTRO

  #error HOTSPOT_VM_DISTRO must be defined

#endif

#define VMNAME HOTSPOT_VM_DISTRO " " VMLP EMBEDDED_ONLY("Embedded ") VMTYPE " VM"

const char* Abstract_VM_Version::vm_name() {

  return VMNAME;

}

const char* Abstract_VM_Version::vm_vendor() {

#ifdef VENDOR

  return XSTR(VENDOR);

#else

  return "Oracle Corporation";

#endif

}

const char* Abstract_VM_Version::vm_info_string() {

  switch (Arguments::mode()) {

    case Arguments::_int:

      return UseSharedSpaces ? "interpreted mode, sharing" : "interpreted mode";

    case Arguments::_mixed:

      return UseSharedSpaces ? "mixed mode, sharing"       :  "mixed mode";

    case Arguments::_comp:

      return UseSharedSpaces ? "compiled mode, sharing"    : "compiled mode";

  };

  ShouldNotReachHere();

  return "";

}

// NOTE: do *not* use stringStream. this function is called by

//       fatal error handler. if the crash is in native thread,

//       stringStream cannot get resource allocated and will SEGV.

const char* Abstract_VM_Version::vm_release() {

  return VM_RELEASE;

}

// NOTE: do *not* use stringStream. this function is called by

//       fatal error handlers. if the crash is in native thread,

//       stringStream cannot get resource allocated and will SEGV.

const char* Abstract_VM_Version::jre_release_version() {

  return JRE_RELEASE_VERSION;

}

#define OS       LINUX_ONLY("linux")             \

                 WINDOWS_ONLY("windows")         \

                 SOLARIS_ONLY("solaris")         \

                 AIX_ONLY("aix")                 \

                 BSD_ONLY("bsd")

#ifndef CPU

#ifdef ZERO

#define CPU      ZERO_LIBARCH

#else

#define CPU      IA32_ONLY("x86")                \

                 IA64_ONLY("ia64")               \

                 AMD64_ONLY("amd64")             \

                 PPC64_ONLY("ppc64")             \

                 AARCH64_ONLY("aarch64")         \

                 SPARC_ONLY("sparc")

#endif // ZERO

#endif

const char *Abstract_VM_Version::vm_platform_string() {

  return OS "-" CPU;

}

const char* Abstract_VM_Version::internal_vm_info_string() {

  #ifndef HOTSPOT_BUILD_USER

    #define HOTSPOT_BUILD_USER unknown

  #endif

  #ifndef HOTSPOT_BUILD_COMPILER

    #ifdef _MSC_VER

      #if _MSC_VER == 1600

        #define HOTSPOT_BUILD_COMPILER "MS VC++ 10.0 (VS2010)"

      #elif _MSC_VER == 1700

        #define HOTSPOT_BUILD_COMPILER "MS VC++ 11.0 (VS2012)"

      #elif _MSC_VER == 1800

        #define HOTSPOT_BUILD_COMPILER "MS VC++ 12.0 (VS2013)"

      #else

        #define HOTSPOT_BUILD_COMPILER "unknown MS VC++:" XSTR(_MSC_VER)

      #endif

    #elif defined(__SUNPRO_CC)

      #if   __SUNPRO_CC == 0x420

        #define HOTSPOT_BUILD_COMPILER "Workshop 4.2"

      #elif __SUNPRO_CC == 0x500

        #define HOTSPOT_BUILD_COMPILER "Workshop 5.0 compat=" XSTR(__SUNPRO_CC_COMPAT)

      #elif __SUNPRO_CC == 0x520

        #define HOTSPOT_BUILD_COMPILER "Workshop 5.2 compat=" XSTR(__SUNPRO_CC_COMPAT)

      #elif __SUNPRO_CC == 0x580

        #define HOTSPOT_BUILD_COMPILER "Workshop 5.8"

      #elif __SUNPRO_CC == 0x590

        #define HOTSPOT_BUILD_COMPILER "Workshop 5.9"

      #elif __SUNPRO_CC == 0x5100

        #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u1"

      #elif __SUNPRO_CC == 0x5120

        #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u3"

      #else

        #define HOTSPOT_BUILD_COMPILER "unknown Workshop:" XSTR(__SUNPRO_CC)

      #endif

    #elif defined(__GNUC__)

        #define HOTSPOT_BUILD_COMPILER "gcc " __VERSION__

    #elif defined(__IBMCPP__)

        #define HOTSPOT_BUILD_COMPILER "xlC " XSTR(__IBMCPP__)

    #else

      #define HOTSPOT_BUILD_COMPILER "unknown compiler"

    #endif

  #endif

  #ifndef FLOAT_ARCH

    #if defined(__SOFTFP__)

      #define FLOAT_ARCH_STR "-sflt"

    #else

      #define FLOAT_ARCH_STR ""

    #endif

  #else

    #define FLOAT_ARCH_STR XSTR(FLOAT_ARCH)

  #endif

  return VMNAME " (" VM_RELEASE ") for " OS "-" CPU FLOAT_ARCH_STR

         " JRE (" JRE_RELEASE_VERSION "), built on " __DATE__ " " __TIME__

         " by " XSTR(HOTSPOT_BUILD_USER) " with " HOTSPOT_BUILD_COMPILER;

}

const char *Abstract_VM_Version::vm_build_user() {

  return HOTSPOT_BUILD_USER;

}

unsigned int Abstract_VM_Version::jvm_version() {

  return ((Abstract_VM_Version::vm_major_version() & 0xFF) << 24) |

         ((Abstract_VM_Version::vm_minor_version() & 0xFF) << 16) |

         ((Abstract_VM_Version::vm_micro_version() & 0xFF) << 8) |

         (Abstract_VM_Version::vm_build_number() & 0xFF);

}

void VM_Version_init() {

  VM_Version::initialize();

#ifndef PRODUCT

  if (PrintMiscellaneous && Verbose) {

  }

#endif

}

unsigned int Abstract_VM_Version::nof_parallel_worker_threads(

                                                      unsigned int num,

                                                      unsigned int den,

                                                      unsigned int switch_pt) {

  if (FLAG_IS_DEFAULT(ParallelGCThreads)) {

    assert(ParallelGCThreads == 0, "Default ParallelGCThreads is not 0");

    // For very large machines, there are diminishing returns

    // for large numbers of worker threads.  Instead of

    // hogging the whole system, use a fraction of the workers for every

    // processor after the first 8.  For example, on a 72 cpu machine

    // and a chosen fraction of 5/8

    // use 8 + (72 - 8) * (5/8) == 48 worker threads.

    unsigned int ncpus = (unsigned int) os::active_processor_count();

    return (ncpus <= switch_pt) ?

           ncpus :

          (switch_pt + ((ncpus - switch_pt) * num) / den);

  } else {

    return ParallelGCThreads;

  }

}

unsigned int Abstract_VM_Version::calc_parallel_worker_threads() {

  return nof_parallel_worker_threads(5, 8, 8);

}

// Does not set the _initialized flag since it is

// a global flag.

unsigned int Abstract_VM_Version::parallel_worker_threads() {

  if (!_parallel_worker_threads_initialized) {

    if (FLAG_IS_DEFAULT(ParallelGCThreads)) {

      _parallel_worker_threads = VM_Version::calc_parallel_worker_threads();

    } else {

      _parallel_worker_threads = ParallelGCThreads;

    }

    _parallel_worker_threads_initialized = true;

  }

  return _parallel_worker_threads;

}