Examples with TypeRegistry org.springsource.loaded.TypeRegistry used on opensource projects

Example 56 with TypeRegistry

use of org.springsource.loaded.TypeRegistry in project spring-loaded by spring-projects.

the class MethodInvokerRewriterTests method rewriteInvokeStatic.

/**
	 * Rewrite of a simple INVOKESTATIC call.
	 */
@Test
public void rewriteInvokeStatic() throws Exception {
    TypeRegistry typeRegistry = getTypeRegistry("tgt.SimpleClass");
    ReloadableType r = typeRegistry.addType("tgt.SimpleClass", loadBytesForClass("tgt.SimpleClass"));
    byte[] callerbytes = loadBytesForClass("tgt.StaticCaller");
    // @formatter:off
    checkMethod(callerbytes, "run", " L0\n" + "    LDC 123\n" + "    INVOKESTATIC tgt/SimpleClass.toInt(Ljava/lang/String;)I\n" + "    IRETURN\n" + " L1\n");
    // @formatter:on
    byte[] rewrittenBytes = MethodInvokerRewriter.rewrite(typeRegistry, callerbytes);
    // @formatter:off
    checkMethod(rewrittenBytes, "run", " L0\n" + "    LDC 123\n" + "    LDC " + r.getId() + "\n" + "    LDC toInt(Ljava/lang/String;)I\n" + "    INVOKESTATIC org/springsource/loaded/TypeRegistry.istcheck(ILjava/lang/String;)Ljava/lang/Object;\n" + "    DUP\n" + "    IFNULL L1\n" + "    CHECKCAST tgt/SimpleClass__I\n" + "    ASTORE 1\n" + // it would remove from here:
    "    LDC 1\n" + // load 1
    "    ANEWARRAY java/lang/Object\n" + // new array of size 1
    "    DUP_X1\n" + // put it under the argument (it'll be under and on top)
    "    SWAP\n" + // put it under and under, arg on top
    "    LDC 0\n" + // load 0
    "    SWAP\n" + // swap 
    "    AASTORE\n" + // to here
    "    ALOAD 1\n" + // load the target
    "    SWAP\n" + // put the target at the bottom
    "    ACONST_NULL\n" + // load the instance (static call so null)
    "    LDC toInt(Ljava/lang/String;)I\n" + // load the name+descriptor
    "    INVOKEINTERFACE tgt/SimpleClass__I.__execute([Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;\n" + "    CHECKCAST java/lang/Integer\n" + "    INVOKEVIRTUAL java/lang/Integer.intValue()I\n" + "    GOTO L2\n" + " L1\n" + "    POP\n" + "    INVOKESTATIC tgt/SimpleClass.toInt(Ljava/lang/String;)I\n" + " L2\n" + "    IRETURN\n" + " L3\n");
    // @formatter:on
    Class<?> callerClazz = loadit("tgt.StaticCaller", rewrittenBytes);
    //		ClassPrinter.print(r.bytesLoaded);
    Result result = runUnguarded(callerClazz, "run");
    assertEquals(123, result.returnValue);
}

Example 57 with TypeRegistry

use of org.springsource.loaded.TypeRegistry in project spring-loaded by spring-projects.

the class MethodInvokerRewriterTests method superCallsDynamicDispatcher.

/**
	 * This is similar to the first case except the hierarchy is split such that a middle type exists which does not
	 * initially implement the methods, they are added in a reload. This variant of the testcase is checking dispatch
	 * through the dynamic dispatch __execute method will work.
	 */
@Test
public void superCallsDynamicDispatcher() throws Exception {
    TypeRegistry tr = getTypeRegistry("invokespecial..*");
    loadType(tr, "invokespecial.Top");
    ReloadableType rt = loadType(tr, "invokespecial.Able2");
    ReloadableType st = loadType(tr, "invokespecial.Simple2");
    rt.loadNewVersion("002", this.retrieveRename("invokespecial.Able2", "invokespecial.Able2002"));
    Object object = st.getClazz().newInstance();
    Method method = null;
    String string = null;
    //		ClassPrinter.print(rt.bytesLoaded);
    method = st.getClazz().getMethod("withParamSuperCaller");
    string = (String) method.invoke(object);
    assertEquals("2323", string);
    method = st.getClazz().getMethod("withDoubleSlotParamSuperCaller");
    string = (String) method.invoke(object);
    assertEquals("3030", string);
    // this call is checking the private field access in the reloaded method has been
    // changed to use the accessors into the type that can access the field from outside
    method = st.getClazz().getMethod("withParamSuperCallerPrivateVariable");
    string = (String) method.invoke(object);
    assertEquals("44", string);
}

Example 58 with TypeRegistry

use of org.springsource.loaded.TypeRegistry in project spring-loaded by spring-projects.

the class MethodInvokerRewriterTests method superCallsRemovingMethods.

/**
	 * This is similar to the first case except the hierarchy is split such that a middle type exists where the methods
	 * initially exist but then they are removed in a reload. We should end up at the top level methods.
	 */
@Test
public void superCallsRemovingMethods() throws Exception {
    TypeRegistry tr = getTypeRegistry("invokespecial..*");
    ReloadableType a = loadType(tr, "invokespecial.A");
    ReloadableType b = loadType(tr, "invokespecial.B");
    ReloadableType c = loadType(tr, "invokespecial.C");
    Object object = c.getClazz().newInstance();
    Method method = null;
    String string = null;
    // class B implements it right now
    method = c.getClazz().getMethod("run1");
    string = (String) method.invoke(object);
    assertEquals("66", string);
    method = c.getClazz().getMethod("run2");
    string = (String) method.invoke(object);
    assertEquals("66falseabc", string);
    // Load new version of B where the methods are no longer there...
    b.loadNewVersion("002", retrieveRename("invokespecial.B", "invokespecial.B002"));
    // these calls should drop through to the super class A
    method = c.getClazz().getMethod("run1");
    string = (String) method.invoke(object);
    assertEquals("65", string);
    method = c.getClazz().getMethod("run2");
    string = (String) method.invoke(object);
    assertEquals("65falseabc", string);
    // Load new version of A where they aren't there either - how do we fail?
    a.loadNewVersion("002", retrieveRename("invokespecial.A", "invokespecial.A002"));
    // these calls should drop through to the super class A
    method = c.getClazz().getMethod("run1");
    try {
        string = (String) method.invoke(object);
        fail();
    } catch (InvocationTargetException ite) {
        assertEquals("java.lang.NoSuchMethodError", ite.getCause().getClass().getName());
        assertEquals("invokespecial.A.getInt()I", ite.getCause().getMessage());
    }
}

Example 59 with TypeRegistry

use of org.springsource.loaded.TypeRegistry in project spring-loaded by spring-projects.

the class MethodInvokerRewriterTests method superCallsControlCheck.

/**
	 * This is the 'control' testcase that loads a pair of types in a hierarchy, and calls methods on the subtype that
	 * simply make super calls to the supertype. Different variants are tested - with/without parameters, double slot
	 * parameters and methods that access private instance state. There is no reloading here, it is basically checking
	 * that the format of the rewritten super calls is OK.
	 */
@Test
public void superCallsControlCheck() throws Exception {
    TypeRegistry tr = getTypeRegistry("invokespecial..*");
    loadType(tr, "invokespecial.Able");
    ReloadableType rt = loadType(tr, "invokespecial.Simple");
    Object object = rt.getClazz().newInstance();
    Method method = rt.getClazz().getMethod("superCaller");
    String string = (String) method.invoke(object);
    assertEquals("abc", string);
    method = rt.getClazz().getMethod("withParamSuperCaller");
    string = (String) method.invoke(object);
    assertEquals("23", string);
    method = rt.getClazz().getMethod("withDoubleSlotParamSuperCaller");
    string = (String) method.invoke(object);
    assertEquals("30", string);
    method = rt.getClazz().getMethod("withParamSuperCallerPrivateVariable");
    string = (String) method.invoke(object);
    assertEquals("1", string);
}

Example 60 with TypeRegistry

use of org.springsource.loaded.TypeRegistry in project spring-loaded by spring-projects.

the class MethodInvokerRewriterTests method rewriteInvokeVirtual1.

// TODO review visibility runtime checking.  In this next test a static method is changed from public to private.  It does
// not currently trigger an error - whether we need to check kind of depends on if we support deployment of broken code.  A
// compiler could not create code like this, it can only happen when one end of a call has been deployed but the other end hasnt
//	/**
//	 * If the static method is made non-visible (private), here is what happens in the java case:
//	 * 
//	 * <pre>
//	 * Exception in thread "main" java.lang.IllegalAccessError: tried to access method B.foo()V from class A
//	 *         at A.main(A.java:3)
//	 * </pre>
//	 */
//	@Test
//	public void rewriteInvokeStatic7() throws Exception {
//		TypeRegistry typeRegistry = getTypeRegistry("tgt.SimpleClass");
//		ReloadableType callee = typeRegistry.addType("tgt.SimpleClass", loadBytesForClass("tgt.SimpleClass"));
//
//		byte[] callerbytes = loadBytesForClass("tgt.StaticCaller");
//		byte[] rewrittenBytes = MethodInvokerRewriter.rewrite(typeRegistry, callerbytes);
//		Class<?> callerClazz = loadit("tgt.StaticCaller", rewrittenBytes);
//
//		Result result = runUnguarded(callerClazz, "run");
//		assertEquals(123, result.returnValue);
//
//		// new version of SimpleClass where target static method has been made private
//		callee.loadNewVersion("7", retrieveRename("tgt.SimpleClass", "tgt.SimpleClass007"));
//
//		try {
//			ClassPrinter.print(rewrittenBytes);
//			result = runUnguarded(callerClazz, "run");
//			System.out.println(result.returnValue);
//  fail here because the visibility of the changed static method has not been policed
//			Assert.fail();
//		} catch (RuntimeException rt) {
//			rt.printStackTrace();
//			InvocationTargetException ite = (InvocationTargetException) rt.getCause();
//			Throwable t = ite.getCause();
//			IncompatibleClassChangeError icce = (IncompatibleClassChangeError) t;
//			assertEquals("Expected static method SimpleClass.toInt(Ljava/lang/String;)I", icce.getMessage());
//		}
//	}
/**
	 * The simplest thing - calling a method with no params and no return (keeps generated code short!)
	 */
@Test
public void rewriteInvokeVirtual1() throws Exception {
    TypeRegistry typeRegistry = getTypeRegistry("invokevirtual.B");
    ReloadableType b = loadType(typeRegistry, "invokevirtual.B");
    byte[] callerbytes = loadBytesForClass("invokevirtual.A");
    byte[] rewrittenBytes = MethodInvokerRewriter.rewrite(typeRegistry, callerbytes);
    Class<?> callerClazz = loadit("invokevirtual.A", rewrittenBytes);
    Result result = runUnguarded(callerClazz, "run");
    Assert.assertNull(result.returnValue);
    callerbytes = loadBytesForClass("invokevirtual.A2");
    callerbytes = ClassRenamer.rename("invokevirtual.A2", callerbytes, "invokevirtual.B2:invokevirtual.B");
    rewrittenBytes = MethodInvokerRewriter.rewrite(typeRegistry, callerbytes);
    Class<?> callerClazz002 = loadit("invokevirtual.A2", rewrittenBytes);
    b.loadNewVersion("2", retrieveRename("invokevirtual.B", "invokevirtual.B2"));
    result = runUnguarded(callerClazz002, "run");
    Assert.assertNull(result.returnValue);
}