Examples with Unsafe sun.misc.Unsafe used on opensource projects

Example 76 with Unsafe

use of sun.misc.Unsafe in project tutorials by eugenp.

the class OffHeapArray method getUnsafe.

private Unsafe getUnsafe() throws IllegalAccessException, NoSuchFieldException {
    Field f = Unsafe.class.getDeclaredField("theUnsafe");
    f.setAccessible(true);
    return (Unsafe) f.get(null);
}

Example 77 with Unsafe

use of sun.misc.Unsafe in project java-interview by MelloChan.

the class DirectMemoryOOM method main.

public static void main(String[] args) throws IllegalAccessException {
    Field unsafe = Unsafe.class.getDeclaredFields()[0];
    unsafe.setAccessible(true);
    Unsafe unsafe1 = (Unsafe) unsafe.get(null);
    while (true) {
        unsafe1.allocateMemory(_1MB);
    }
}

Example 78 with Unsafe

use of sun.misc.Unsafe in project symja_android_library by axkr.

the class UnsafeUtil method fetchUnsafe.

private static Unsafe fetchUnsafe() {
    try {
        Field f = Unsafe.class.getDeclaredField("theUnsafe");
        f.setAccessible(true);
        return (Unsafe) f.get(null);
    } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
        LOG.error("Could not get unsafe: " + e, e);
        return null;
    }
}

Example 79 with Unsafe

use of sun.misc.Unsafe in project groovy-core by groovy.

the class FastStringUtils method loadUnsafe.

/**
 * @return Unsafe
 */
private static Unsafe loadUnsafe() {
    try {
        Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
        unsafeField.setAccessible(true);
        return (Unsafe) unsafeField.get(null);
    } catch (Exception e) {
        return null;
    }
}

Example 80 with Unsafe

use of sun.misc.Unsafe in project jboss-modules by jboss-modules.

the class JAXPModuleTest method testMain.

/*
     * This test is slightly dangerous. If it causes problems, just add @Ignore
     * and/or let me know.
     *   -Jason
     */
@Test
public void testMain() throws Throwable {
    final java.lang.reflect.Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
    unsafeField.setAccessible(true);
    Unsafe unsafe = (Unsafe) unsafeField.get(null);
    java.lang.reflect.Field field = DefaultBootModuleLoaderHolder.class.getDeclaredField("INSTANCE");
    ModuleLoader oldMl = (ModuleLoader) field.get(null);
    final Object fieldBase = unsafe.staticFieldBase(field);
    final long fieldOffset = unsafe.staticFieldOffset(field);
    unsafe.putObjectVolatile(fieldBase, fieldOffset, moduleLoader);
    Main.main(new String[] { "-jaxpmodule", "fake-jaxp", "test-jaxp" });
    ModuleClassLoader cl = moduleLoader.loadModule(ModuleIdentifier.fromString("test-jaxp")).getClassLoader();
    Class<?> clazz = cl.loadClass("org.jboss.modules.test.JAXPCaller");
    ClassLoader old = Thread.currentThread().getContextClassLoader();
    try {
        Thread.currentThread().setContextClassLoader(cl);
        checkDom(clazz, false, true);
        checkSax(clazz, false, true);
        checkTransformer(clazz, false, true);
        checkSAXTransformer(clazz, false, true);
        checkXmlEvent(clazz, false, true);
        checkXPath(clazz, false, true);
        checkXmlInput(clazz, false, true);
        checkXmlOutput(clazz, false, true);
        checkDatatype(clazz, false, true);
        checkSchema(clazz, false, true);
        checkXMLReader(clazz, false, true);
    } finally {
        unsafe.putObjectVolatile(fieldBase, fieldOffset, oldMl);
        Thread.currentThread().setContextClassLoader(old);
        __JAXPRedirected.restorePlatformFactory();
    }
}