Mercurial > hg > truffle
view src/share/vm/runtime/java.hpp @ 1949:058f494c8b6d
Merge
author | trims |
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date | Fri, 10 Dec 2010 15:46:59 -0800 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 1997, 2008, 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. * */ // Register function to be called by before_exit extern "C" { void register_on_exit_function(void (*func)(void)) ;} // Execute code before all handles are released and thread is killed; prologue to vm_exit extern void before_exit(JavaThread * thread); // Forced VM exit (i.e, internal error or JVM_Exit) extern void vm_exit(int code); // Wrapper for ::exit() extern void vm_direct_exit(int code); // Shutdown the VM but do not exit the process extern void vm_shutdown(); // Shutdown the VM and abort the process extern void vm_abort(bool dump_core=true); // Trigger any necessary notification of the VM being shutdown extern void notify_vm_shutdown(); // VM exit if error occurs during initialization of VM extern void vm_exit_during_initialization(Handle exception); extern void vm_exit_during_initialization(symbolHandle exception_name, const char* message); extern void vm_exit_during_initialization(const char* error, const char* message = NULL); extern void vm_shutdown_during_initialization(const char* error, const char* message = NULL); /** * Discovering the JDK_Version during initialization is tricky when the * running JDK is less than JDK6. For JDK6 and greater, a "GetVersion" * function exists in libjava.so and we simply call it during the * 'initialize()' call to find the version. For JDKs with version < 6, no * such call exists and we have to probe the JDK in order to determine * the exact version. This probing cannot happen during late in * the VM initialization process so there's a period of time during * initialization when we don't know anything about the JDK version other than * that it less than version 6. This is the "partially initialized" time, * when we can answer only certain version queries (such as, is the JDK * version greater than 5? Answer: no). Once the JDK probing occurs, we * know the version and are considered fully initialized. */ class JDK_Version VALUE_OBJ_CLASS_SPEC { friend class VMStructs; friend class Universe; friend void JDK_Version_init(); private: static JDK_Version _current; // In this class, we promote the minor version of release to be the // major version for releases >= 5 in anticipation of the JDK doing the // same thing. For example, we represent "1.5.0" as major version 5 (we // drop the leading 1 and use 5 as the 'major'). uint8_t _major; uint8_t _minor; uint8_t _micro; uint8_t _update; uint8_t _special; uint8_t _build; // If partially initialized, the above fields are invalid and we know // that we're less than major version 6. bool _partially_initialized; bool _thread_park_blocker; bool is_valid() const { return (_major != 0 || _partially_initialized); } // initializes or partially initializes the _current static field static void initialize(); // Completes initialization for a pre-JDK6 version. static void fully_initialize(uint8_t major, uint8_t minor = 0, uint8_t micro = 0, uint8_t update = 0); public: // Returns true if the the current version has only been partially initialized static bool is_partially_initialized() { return _current._partially_initialized; } JDK_Version() : _major(0), _minor(0), _micro(0), _update(0), _special(0), _build(0), _partially_initialized(false), _thread_park_blocker(false) {} JDK_Version(uint8_t major, uint8_t minor = 0, uint8_t micro = 0, uint8_t update = 0, uint8_t special = 0, uint8_t build = 0, bool thread_park_blocker = false) : _major(major), _minor(minor), _micro(micro), _update(update), _special(special), _build(build), _partially_initialized(false), _thread_park_blocker(thread_park_blocker) {} // Returns the current running JDK version static JDK_Version current() { return _current; } // Factory methods for convenience static JDK_Version jdk(uint8_t m) { return JDK_Version(m); } static JDK_Version jdk_update(uint8_t major, uint8_t update_number) { return JDK_Version(major, 0, 0, update_number); } uint8_t major_version() const { return _major; } uint8_t minor_version() const { return _minor; } uint8_t micro_version() const { return _micro; } uint8_t update_version() const { return _update; } uint8_t special_update_version() const { return _special; } uint8_t build_number() const { return _build; } bool supports_thread_park_blocker() const { return _thread_park_blocker; } // Performs a full ordering comparison using all fields (update, build, etc.) int compare(const JDK_Version& other) const; /** * Performs comparison using only the major version, returning negative * if the major version of 'this' is less than the parameter, 0 if it is * equal, and a positive value if it is greater. */ int compare_major(int version) const { if (_partially_initialized) { if (version >= 6) { return -1; } else { assert(false, "Can't make this comparison during init time"); return -1; // conservative } } else { return major_version() - version; } } void to_string(char* buffer, size_t buflen) const; // Convenience methods for queries on the current major/minor version static bool is_jdk12x_version() { return current().compare_major(2) == 0; } static bool is_jdk13x_version() { return current().compare_major(3) == 0; } static bool is_jdk14x_version() { return current().compare_major(4) == 0; } static bool is_jdk15x_version() { return current().compare_major(5) == 0; } static bool is_jdk16x_version() { return current().compare_major(6) == 0; } static bool is_jdk17x_version() { return current().compare_major(7) == 0; } static bool is_gte_jdk13x_version() { return current().compare_major(3) >= 0; } static bool is_gte_jdk14x_version() { return current().compare_major(4) >= 0; } static bool is_gte_jdk15x_version() { return current().compare_major(5) >= 0; } static bool is_gte_jdk16x_version() { return current().compare_major(6) >= 0; } static bool is_gte_jdk17x_version() { return current().compare_major(7) >= 0; } };