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JDK 11 java.base.jmod - Base Module
JDK 11 java.base.jmod is the JMOD file for JDK 11 Base module.
JDK 11 Base module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.base.jmod.
JDK 11 Base module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 Base module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.base.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ jdk/internal/misc/VM.java
/* * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package jdk.internal.misc; import static java.lang.Thread.State.*; import java.util.Map; import java.util.Properties; public class VM { // the init level when the VM is fully initialized private static final int JAVA_LANG_SYSTEM_INITED = 1; private static final int MODULE_SYSTEM_INITED = 2; private static final int SYSTEM_LOADER_INITIALIZING = 3; private static final int SYSTEM_BOOTED = 4; private static final int SYSTEM_SHUTDOWN = 5; // 0, 1, 2, ... private static volatile int initLevel; private static final Object lock = new Object(); /** * Sets the init level. * * @see java.lang.System#initPhase1 * @see java.lang.System#initPhase2 * @see java.lang.System#initPhase3 */ public static void initLevel(int value) { synchronized (lock) { if (value <= initLevel || value > SYSTEM_SHUTDOWN) throw new InternalError("Bad level: " + value); initLevel = value; lock.notifyAll(); } } /** * Returns the current init level. */ public static int initLevel() { return initLevel; } /** * Waits for the init level to get the given value. * * @see java.lang.ref.Finalizer */ public static void awaitInitLevel(int value) throws InterruptedException { synchronized (lock) { while (initLevel < value) { lock.wait(); } } } /** * Returns {@code true} if the module system has been initialized. * @see java.lang.System#initPhase2 */ public static boolean isModuleSystemInited() { return VM.initLevel() >= MODULE_SYSTEM_INITED; } /** * Returns {@code true} if the VM is fully initialized. */ public static boolean isBooted() { return initLevel >= SYSTEM_BOOTED; } /** * Set shutdown state. Shutdown completes when all registered shutdown * hooks have been run. * * @see java.lang.Shutdown */ public static void shutdown() { initLevel(SYSTEM_SHUTDOWN); } /** * Returns {@code true} if the VM has been shutdown */ public static boolean isShutdown() { return initLevel == SYSTEM_SHUTDOWN; } // A user-settable upper limit on the maximum amount of allocatable direct // buffer memory. This value may be changed during VM initialization if // "java" is launched with "-XX:MaxDirectMemorySize=<size>". // // The initial value of this field is arbitrary; during JRE initialization // it will be reset to the value specified on the command line, if any, // otherwise to Runtime.getRuntime().maxMemory(). // private static long directMemory = 64 * 1024 * 1024; // Returns the maximum amount of allocatable direct buffer memory. // The directMemory variable is initialized during system initialization // in the saveAndRemoveProperties method. // public static long maxDirectMemory() { return directMemory; } // User-controllable flag that determines if direct buffers should be page // aligned. The "-XX:+PageAlignDirectMemory" option can be used to force // buffers, allocated by ByteBuffer.allocateDirect, to be page aligned. private static boolean pageAlignDirectMemory; // Returns {@code true} if the direct buffers should be page aligned. This // variable is initialized by saveAndRemoveProperties. public static boolean isDirectMemoryPageAligned() { return pageAlignDirectMemory; } /** * Returns true if the given class loader is the bootstrap class loader * or the platform class loader. */ public static boolean isSystemDomainLoader(ClassLoader loader) { return loader == null || loader == ClassLoader.getPlatformClassLoader(); } /** * Returns the system property of the specified key saved at * system initialization time. This method should only be used * for the system properties that are not changed during runtime. * * Note that the saved system properties do not include * the ones set by java.lang.VersionProps.init(). */ public static String getSavedProperty(String key) { if (savedProps == null) throw new IllegalStateException("Not yet initialized"); return savedProps.get(key); } /** * Gets an unmodifiable view of the system properties saved at system * initialization time. This method should only be used * for the system properties that are not changed during runtime. * * Note that the saved system properties do not include * the ones set by java.lang.VersionProps.init(). */ public static Map<String, String> getSavedProperties() { if (savedProps == null) throw new IllegalStateException("Not yet initialized"); return savedProps; } private static Map<String, String> savedProps; // Save a private copy of the system properties and remove // the system properties that are not intended for public access. // // This method can only be invoked during system initialization. public static void saveAndRemoveProperties(Properties props) { if (initLevel() != 0) throw new IllegalStateException("Wrong init level"); @SuppressWarnings({"rawtypes", "unchecked"}) Map<String, String> sp = Map.ofEntries(props.entrySet().toArray(new Map.Entry[0])); // only main thread is running at this time, so savedProps and // its content will be correctly published to threads started later savedProps = sp; // Set the maximum amount of direct memory. This value is controlled // by the vm option -XX:MaxDirectMemorySize=<size>. // The maximum amount of allocatable direct buffer memory (in bytes) // from the system property sun.nio.MaxDirectMemorySize set by the VM. // The system property will be removed. String s = (String)props.remove("sun.nio.MaxDirectMemorySize"); if (s != null) { if (s.equals("-1")) { // -XX:MaxDirectMemorySize not given, take default directMemory = Runtime.getRuntime().maxMemory(); } else { long l = Long.parseLong(s); if (l > -1) directMemory = l; } } // Check if direct buffers should be page aligned s = (String)props.remove("sun.nio.PageAlignDirectMemory"); if ("true".equals(s)) pageAlignDirectMemory = true; // Remove other private system properties // used by java.lang.Integer.IntegerCache props.remove("java.lang.Integer.IntegerCache.high"); // used by sun.launcher.LauncherHelper props.remove("sun.java.launcher.diag"); // used by jdk.internal.loader.ClassLoaders props.remove("jdk.boot.class.path.append"); } // Initialize any miscellaneous operating system settings that need to be // set for the class libraries. // public static void initializeOSEnvironment() { if (initLevel() == 0) { OSEnvironment.initialize(); } } /* Current count of objects pending for finalization */ private static volatile int finalRefCount; /* Peak count of objects pending for finalization */ private static volatile int peakFinalRefCount; /* * Gets the number of objects pending for finalization. * * @return the number of objects pending for finalization. */ public static int getFinalRefCount() { return finalRefCount; } /* * Gets the peak number of objects pending for finalization. * * @return the peak number of objects pending for finalization. */ public static int getPeakFinalRefCount() { return peakFinalRefCount; } /* * Add {@code n} to the objects pending for finalization count. * * @param n an integer value to be added to the objects pending * for finalization count */ public static void addFinalRefCount(int n) { // The caller must hold lock to synchronize the update. finalRefCount += n; if (finalRefCount > peakFinalRefCount) { peakFinalRefCount = finalRefCount; } } /** * Returns Thread.State for the given threadStatus */ public static Thread.State toThreadState(int threadStatus) { if ((threadStatus & JVMTI_THREAD_STATE_RUNNABLE) != 0) { return RUNNABLE; } else if ((threadStatus & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER) != 0) { return BLOCKED; } else if ((threadStatus & JVMTI_THREAD_STATE_WAITING_INDEFINITELY) != 0) { return WAITING; } else if ((threadStatus & JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT) != 0) { return TIMED_WAITING; } else if ((threadStatus & JVMTI_THREAD_STATE_TERMINATED) != 0) { return TERMINATED; } else if ((threadStatus & JVMTI_THREAD_STATE_ALIVE) == 0) { return NEW; } else { return RUNNABLE; } } /* The threadStatus field is set by the VM at state transition * in the hotspot implementation. Its value is set according to * the JVM TI specification GetThreadState function. */ private static final int JVMTI_THREAD_STATE_ALIVE = 0x0001; private static final int JVMTI_THREAD_STATE_TERMINATED = 0x0002; private static final int JVMTI_THREAD_STATE_RUNNABLE = 0x0004; private static final int JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER = 0x0400; private static final int JVMTI_THREAD_STATE_WAITING_INDEFINITELY = 0x0010; private static final int JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT = 0x0020; /* * Returns the first user-defined class loader up the execution stack, * or the platform class loader if only code from the platform or * bootstrap class loader is on the stack. */ public static ClassLoader latestUserDefinedLoader() { ClassLoader loader = latestUserDefinedLoader0(); return loader != null ? loader : ClassLoader.getPlatformClassLoader(); } /* * Returns the first user-defined class loader up the execution stack, * or null if only code from the platform or bootstrap class loader is * on the stack. VM does not keep a reference of platform loader and so * it returns null. * * This method should be replaced with StackWalker::walk and then we can * remove the logic in the VM. */ private static native ClassLoader latestUserDefinedLoader0(); /** * Returns {@code true} if we are in a set UID program. */ public static boolean isSetUID() { long uid = getuid(); long euid = geteuid(); long gid = getgid(); long egid = getegid(); return uid != euid || gid != egid; } /** * Returns the real user ID of the calling process, * or -1 if the value is not available. */ public static native long getuid(); /** * Returns the effective user ID of the calling process, * or -1 if the value is not available. */ public static native long geteuid(); /** * Returns the real group ID of the calling process, * or -1 if the value is not available. */ public static native long getgid(); /** * Returns the effective group ID of the calling process, * or -1 if the value is not available. */ public static native long getegid(); /** * Get a nanosecond time stamp adjustment in the form of a single long. * * This value can be used to create an instant using * {@link java.time.Instant#ofEpochSecond(long, long) * java.time.Instant.ofEpochSecond(offsetInSeconds, * getNanoTimeAdjustment(offsetInSeconds))}. * <p> * The value returned has the best resolution available to the JVM on * the current system. * This is usually down to microseconds - or tenth of microseconds - * depending on the OS/Hardware and the JVM implementation. * * @param offsetInSeconds The offset in seconds from which the nanosecond * time stamp should be computed. * * @apiNote The offset should be recent enough - so that * {@code offsetInSeconds} is within {@code +/- 2^32} seconds of the * current UTC time. If the offset is too far off, {@code -1} will be * returned. As such, {@code -1} must not be considered as a valid * nano time adjustment, but as an exception value indicating * that an offset closer to the current time should be used. * * @return A nanosecond time stamp adjustment in the form of a single long. * If the offset is too far off the current time, this method returns -1. * In that case, the caller should call this method again, passing a * more accurate offset. */ public static native long getNanoTimeAdjustment(long offsetInSeconds); /** * Returns the VM arguments for this runtime environment. * * @implNote * The HotSpot JVM processes the input arguments from multiple sources * in the following order: * 1. JAVA_TOOL_OPTIONS environment variable * 2. Options from JNI Invocation API * 3. _JAVA_OPTIONS environment variable * * If VM options file is specified via -XX:VMOptionsFile, the vm options * file is read and expanded in place of -XX:VMOptionFile option. */ public static native String[] getRuntimeArguments(); static { initialize(); } private static native void initialize(); }
⏎ jdk/internal/misc/VM.java
Or download all of them as a single archive file:
File name: java.base-11.0.1-src.zip File size: 8740354 bytes Release date: 2018-11-04 Download
2020-05-29, 207151👍, 0💬
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