hotspot/src/share/vm/runtime/vm_version.cpp - platform/libcore - Git at Google

 /*
  * 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 "code/codeCacheExtensions.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() {
   if (CodeCacheExtensions::use_pregenerated_interpreter()) {
     return "interpreted mode, pregenerated";
   }
   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) {
     char buf[512];
     os::print_cpu_info(tty, buf, sizeof(buf));
   }
 #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;
 }
	/*
	* 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 "code/codeCacheExtensions.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() {
	if (CodeCacheExtensions::use_pregenerated_interpreter()) {
	return "interpreted mode, pregenerated";
	}
	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) {
	char buf[512];
	os::print_cpu_info(tty, buf, sizeof(buf));
	}
	#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;
	}