List of usage examples for org.objectweb.asm.tree MethodNode visitInsn
@Override public void visitInsn(final int opcode)
From source file:clientapi.load.transform.impl.ValueAccessorTransformer.java
License:Apache License
/** * Creates the field-getter getter method in the specified {@code ClassNode} * * @param cn The ClassNode//from w ww . j a va2 s . c o m */ private void createFieldGetter(ClassNode cn) { MethodNode mn = new MethodNode(ACC_PUBLIC | ACC_FINAL, "getFieldGetter", "(Ljava/lang/String;)Ljava/util/function/Supplier;", null, null); // Create a check for all labeled fields in the cache fieldCache.forEach((id, fn) -> { MethodNode handle; { // Create lambda handle method handle = new MethodNode(ACC_PRIVATE | ACC_SYNTHETIC, "lambda$getFieldGetter$" + current++, "()Ljava/lang/Object;", null, null); // Get the field value handle.visitVarInsn(ALOAD, 0); handle.visitFieldInsn(GETFIELD, cn.name, fn.name, fn.desc); // If the field is a primitive type, get the object representation String object = getObject(fn.desc); if (!object.equals(fn.desc)) handle.visitMethodInsn(INVOKESTATIC, object, "valueOf", "(" + fn.desc + ")L" + object + ";", false); // Return the value handle.visitInsn(ARETURN); // Add the handle method to the class cn.methods.add(handle); } // Create label for IF statement jump Label skip = new Label(); // Compare the target value with the expected value mn.visitVarInsn(ALOAD, 1); mn.visitLdcInsn(id); mn.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false); // Jump if the input doesn't match the expected value mn.visitJumpInsn(IFEQ, skip); // Return the getter mn.visitVarInsn(ALOAD, 0); mn.visitInvokeDynamicInsn("get", "(L" + cn.name + ";)Ljava/util/function/Supplier;", // Define the bootstrap method METAFACTORY, // Fill the remaining 3 args for the method Type.getMethodType("()Ljava/lang/Object;"), createMethodHandle(H_INVOKESPECIAL, cn, handle), Type.getMethodType("()Ljava/lang/Object;")); mn.visitInsn(ARETURN); // Indicate where the IF statement should jump to if it fails mn.visitLabel(skip); }); mn.visitInsn(ACONST_NULL); mn.visitInsn(ARETURN); cn.methods.add(mn); }
From source file:clientapi.load.transform.impl.ValueAccessorTransformer.java
License:Apache License
/** * Creates the field-setter getter method in the specified {@code ClassNode} * * @see ValueAccessor// w w w .ja v a2 s .c om * * @param cn The ClassNode */ private void createFieldSetter(ClassNode cn) { MethodNode mn = new MethodNode(ACC_PUBLIC | ACC_FINAL, "getFieldSetter", "(Ljava/lang/String;)Ljava/util/function/Consumer;", null, null); // Create a check for all labeled fields in the cache fieldCache.forEach((id, fn) -> { MethodNode handle; { // Create lambda handle method handle = new MethodNode(ACC_PRIVATE | ACC_SYNTHETIC, "lambda$getFieldSetter$" + current++, "(Ljava/lang/Object;)V", null, null); handle.visitVarInsn(ALOAD, 0); handle.visitVarInsn(ALOAD, 1); handle.visitTypeInsn(CHECKCAST, getStrippedDesc(getObject(fn.desc))); // If the field is a primitive type, get the primitive value String object = getObject(fn.desc); if (!object.equals(fn.desc)) handle.visitMethodInsn(INVOKEVIRTUAL, object, getClassName(fn.desc) + "Value", "()" + fn.desc, false); // Set the field value handle.visitFieldInsn(PUTFIELD, cn.name, fn.name, fn.desc); handle.visitInsn(RETURN); // Add the handle method to the class cn.methods.add(handle); } // Create label for IF statement jump Label skip = new Label(); // Compare the target value with the expected value mn.visitVarInsn(ALOAD, 1); mn.visitLdcInsn(id); mn.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false); // Jump if the input doesn't match the expected value mn.visitJumpInsn(IFEQ, skip); // Return the setter mn.visitVarInsn(ALOAD, 0); mn.visitInvokeDynamicInsn("accept", "(L" + cn.name + ";)Ljava/util/function/Consumer;", // Define the bootstrap method METAFACTORY, // Fill the remaining 3 args for the method Type.getMethodType("(Ljava/lang/Object;)V"), createMethodHandle(H_INVOKESPECIAL, cn, handle), Type.getMethodType("(Ljava/lang/Object;)V")); mn.visitInsn(ARETURN); // Indicate where the IF statement should jump to if it fails mn.visitLabel(skip); }); mn.visitInsn(ACONST_NULL); mn.visitInsn(ARETURN); cn.methods.add(mn); }
From source file:com.liferay.portal.nio.intraband.proxy.IntrabandProxyUtilTest.java
License:Open Source License
private void _doTestToClass(boolean proxyClassesDumpEnabled, boolean logEnabled) throws FileNotFoundException { class TestClass { }/*w w w. ja v a 2 s .c om*/ ClassNode classNode = _loadClass(TestClass.class); MethodNode methodNode = new MethodNode(Opcodes.ACC_PUBLIC, "<clinit>", "()V", null, null); methodNode.visitCode(); methodNode.visitInsn(Opcodes.RETURN); methodNode.visitEnd(); List<MethodNode> methodNodes = classNode.methods; methodNodes.add(methodNode); ClassLoader classLoader = new URLClassLoader(new URL[0], null); Level level = Level.WARNING; if (logEnabled) { level = Level.INFO; } try (CaptureHandler captureHandler = JDKLoggerTestUtil .configureJDKLogger(IntrabandProxyUtil.class.getName(), level)) { List<LogRecord> logRecords = captureHandler.getLogRecords(); IntrabandProxyUtil.toClass(classNode, classLoader); if (proxyClassesDumpEnabled) { StringBundler sb = new StringBundler(6); sb.append(SystemProperties.get(SystemProperties.TMP_DIR)); sb.append(StringPool.SLASH); sb.append(PropsValues.INTRABAND_PROXY_DUMP_CLASSES_DIR); sb.append(StringPool.SLASH); sb.append(classNode.name); sb.append(".class"); String filePath = sb.toString(); File classFile = new File(filePath); Assert.assertTrue(classFile.exists()); ClassNode reloadedClassNode = _loadClass(new FileInputStream(classFile)); MethodNode clinitMethodNode = ASMUtil.findMethodNode(reloadedClassNode.methods, "<clinit>", Type.VOID_TYPE); InsnList insnList = clinitMethodNode.instructions; Assert.assertEquals(1, insnList.size()); _assertInsnNode(insnList.getFirst(), Opcodes.RETURN); if (logEnabled) { Assert.assertEquals(1, logRecords.size()); LogRecord logRecord = logRecords.get(0); Assert.assertEquals(logRecord.getMessage(), "Dumpped class ".concat(filePath)); } } if (!proxyClassesDumpEnabled || !logEnabled) { Assert.assertTrue(logRecords.isEmpty()); } } try { IntrabandProxyUtil.toClass(classNode, classLoader); Assert.fail(); } catch (RuntimeException re) { Throwable throwable = re.getCause(); Assert.assertSame(InvocationTargetException.class, throwable.getClass()); throwable = throwable.getCause(); Assert.assertSame(LinkageError.class, throwable.getClass()); String message = throwable.getMessage(); Assert.assertTrue(message.contains( "duplicate class definition for name: \"" + Type.getInternalName(TestClass.class) + "\"")); } }
From source file:com.seovic.pof.PortableTypeGenerator.java
License:Apache License
private void implementDefaultConstructor() { MethodNode ctor = findMethod("<init>", "()V"); if (ctor == null) { ctor = new MethodNode(ACC_PUBLIC, "<init>", "()V", null, null); ctor.visitCode();/*from w ww.j a v a 2s . c o m*/ ctor.visitVarInsn(ALOAD, 0); ctor.visitMethodInsn(INVOKESPECIAL, cn.superName, "<init>", "()V"); ctor.visitInsn(RETURN); ctor.visitMaxs(1, 1); ctor.visitEnd(); cn.methods.add(ctor); } else if ((ctor.access & ACC_PUBLIC) == 0) { LOG.info("Class " + cn.name + " has a non-public default constructor. Making it public."); ctor.access = ACC_PUBLIC; } }
From source file:com.seovic.pof.PortableTypeGenerator.java
License:Apache License
private void implementReadExternal() { int index = 0; MethodNode mn = new MethodNode(ACC_PRIVATE, "readExternal", "(Lcom/tangosol/io/pof/PofReader;)V", null, new String[] { "java/io/IOException" }); mn.visitCode();/* w ww . j a v a 2 s .co m*/ for (int version : properties.keySet()) { mn.visitVarInsn(ALOAD, 1); mn.visitMethodInsn(INVOKEINTERFACE, "com/tangosol/io/pof/PofReader", "getVersionId", "()I"); mn.visitIntInsn(BIPUSH, version); Label l = new Label(); mn.visitJumpInsn(IF_ICMPLT, l); SortedSet<FieldNode> fields = properties.get(version); for (FieldNode fn : fields) { Type type = Type.getType(fn.desc); if (isDebugEnabled()) { mn.visitLdcInsn("reading attribute " + index + " (" + fn.name + ") from POF stream"); mn.visitIntInsn(BIPUSH, 7); mn.visitMethodInsn(INVOKESTATIC, "com/tangosol/net/CacheFactory", "log", "(Ljava/lang/String;I)V"); } mn.visitVarInsn(ALOAD, 0); mn.visitVarInsn(ALOAD, 1); mn.visitIntInsn(BIPUSH, index++); ReadMethod readMethod = getReadMethod(fn, type); readMethod.createTemplate(mn, fn, type); mn.visitMethodInsn(INVOKEINTERFACE, "com/tangosol/io/pof/PofReader", readMethod.getName(), readMethod.getDescriptor()); if (type.getSort() == Type.OBJECT || "readObjectArray".equals(readMethod.getName())) { mn.visitTypeInsn(CHECKCAST, type.getInternalName()); } mn.visitFieldInsn(PUTFIELD, cn.name, fn.name, fn.desc); } mn.visitLabel(l); mn.visitFrame(F_SAME, 0, null, 0, null); } mn.visitInsn(RETURN); mn.visitMaxs(0, 0); mn.visitEnd(); if (!hasMethod(mn)) { cn.methods.add(mn); } LOG.debug("Implemented method: " + mn.name); }
From source file:com.seovic.pof.PortableTypeGenerator.java
License:Apache License
private void implementWriteExternal() { int index = 0; MethodNode mn = new MethodNode(ACC_PRIVATE, "writeExternal", "(Lcom/tangosol/io/pof/PofWriter;)V", null, new String[] { "java/io/IOException" }); mn.visitCode();/*from ww w . j av a2 s . co m*/ for (int version : properties.keySet()) { SortedSet<FieldNode> fields = properties.get(version); for (FieldNode fn : fields) { addPofIndex(fn, index); Type type = Type.getType(fn.desc); if (isDebugEnabled()) { mn.visitLdcInsn("writing attribute " + index + " (" + fn.name + ") to POF stream"); mn.visitIntInsn(BIPUSH, 7); mn.visitMethodInsn(INVOKESTATIC, "com/tangosol/net/CacheFactory", "log", "(Ljava/lang/String;I)V"); } mn.visitVarInsn(ALOAD, 1); mn.visitIntInsn(BIPUSH, index++); mn.visitVarInsn(ALOAD, 0); mn.visitFieldInsn(GETFIELD, cn.name, fn.name, fn.desc); WriteMethod writeMethod = getWriteMethod(fn, type); writeMethod.pushUniformTypes(mn); mn.visitMethodInsn(INVOKEINTERFACE, "com/tangosol/io/pof/PofWriter", writeMethod.getName(), writeMethod.getDescriptor()); } } mn.visitInsn(RETURN); mn.visitMaxs(0, 0); mn.visitEnd(); if (!hasMethod(mn)) { cn.methods.add(mn); } LOG.debug("Implemented method: " + mn.name); }
From source file:de.sanandrew.core.manpack.transformer.TransformBadPotionsATN.java
License:Creative Commons License
private byte[] transformPotion(byte[] bytes) { ClassNode cn = ASMHelper.createClassNode(bytes); if (ASMHelper.hasClassMethodName(cn, ASMNames.M_isBadEffect)) { return bytes; }//from ww w . j a va2s .c o m MethodNode method = new MethodNode(Opcodes.ACC_PUBLIC, ASMNames.M_isBadEffect, "()Z", null, null); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitFieldInsn(Opcodes.GETFIELD, "net/minecraft/potion/Potion", ASMNames.F_isBadEffect, "Z"); method.visitInsn(Opcodes.IRETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("this", "Lnet/minecraft/potion/Potion;", null, l0, l1, 0); method.visitMaxs(0, 0); method.visitEnd(); cn.methods.add(method); bytes = ASMHelper.createBytes(cn, ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); return bytes; }
From source file:de.sanandrew.core.manpack.transformer.TransformELBAttackingPlayer.java
License:Creative Commons License
private static byte[] transformAccessors(byte[] bytes) { ClassNode clazz = ASMHelper.createClassNode(bytes); int complete = 0; for (MethodNode method : clazz.methods) { switch (method.name) { case "getELAttackingPlayer": { method.instructions.clear(); method.visitCode();//from www . j a v a 2 s . co m Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "net/minecraft/entity/EntityLivingBase", "_SAP_getAttackingPlayer", "()Lnet/minecraft/entity/player/EntityPlayer;", false); method.visitInsn(Opcodes.ARETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("entity", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l1, 0); method.visitMaxs(0, 0); method.visitEnd(); complete++; continue; } case "setELAttackingPlayer": { method.instructions.clear(); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 1); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "net/minecraft/entity/EntityLivingBase", "_SAP_setAttackingPlayer", "(Lnet/minecraft/entity/player/EntityPlayer;)V", false); Label l1 = new Label(); method.visitLabel(l1); method.visitInsn(Opcodes.RETURN); Label l2 = new Label(); method.visitLabel(l2); method.visitLocalVariable("player", "Lnet/minecraft/entity/player/EntityPlayer;", null, l0, l2, 0); method.visitLocalVariable("entity", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l2, 1); method.visitMaxs(0, 0); method.visitEnd(); complete++; continue; } case "getELRecentlyHit": { method.instructions.clear(); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "net/minecraft/entity/EntityLivingBase", "_SAP_getRecentlyHit", "()I", false); method.visitInsn(Opcodes.IRETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("entity", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l1, 0); method.visitMaxs(0, 0); method.visitEnd(); complete++; continue; } case "setELRecentlyHit": { method.instructions.clear(); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 1); method.visitVarInsn(Opcodes.ILOAD, 0); method.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "net/minecraft/entity/EntityLivingBase", "_SAP_setRecentlyHit", "(I)V", false); Label l1 = new Label(); method.visitLabel(l1); method.visitInsn(Opcodes.RETURN); Label l2 = new Label(); method.visitLabel(l2); method.visitLocalVariable("hit", "I", null, l0, l2, 0); method.visitLocalVariable("entity", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l2, 1); method.visitMaxs(0, 0); method.visitEnd(); complete++; continue; } } if (complete >= 4) { break; } } bytes = ASMHelper.createBytes(clazz, ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); return bytes; }
From source file:de.sanandrew.core.manpack.transformer.TransformELBAttackingPlayer.java
License:Creative Commons License
private static byte[] transformAttackingPlayer(byte[] bytes) { ClassNode clazz = ASMHelper.createClassNode(bytes); /** ADD GETTER FOR ATTACKING PLAYER **/ {//ww w. j a v a 2 s.c o m MethodNode method = new MethodNode(Opcodes.ACC_PUBLIC, "_SAP_getAttackingPlayer", "()Lnet/minecraft/entity/player/EntityPlayer;", null, null); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitFieldInsn(Opcodes.GETFIELD, "net/minecraft/entity/EntityLivingBase", ASMNames.F_attackingPlayer, "Lnet/minecraft/entity/player/EntityPlayer;"); method.visitInsn(Opcodes.ARETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("this", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l1, 0); method.visitMaxs(0, 0); method.visitEnd(); clazz.methods.add(method); } /** ADD SETTER FOR ATTACKING PLAYER **/ { MethodNode method = new MethodNode(Opcodes.ACC_PUBLIC, "_SAP_setAttackingPlayer", "(Lnet/minecraft/entity/player/EntityPlayer;)V", null, null); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitVarInsn(Opcodes.ALOAD, 1); method.visitFieldInsn(Opcodes.PUTFIELD, "net/minecraft/entity/EntityLivingBase", ASMNames.F_attackingPlayer, "Lnet/minecraft/entity/player/EntityPlayer;"); Label l1 = new Label(); method.visitLabel(l1); method.visitInsn(Opcodes.RETURN); Label l2 = new Label(); method.visitLabel(l2); method.visitLocalVariable("this", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l2, 0); method.visitLocalVariable("player", "Lnet/minecraft/entity/player/EntityPlayer;", null, l0, l2, 1); method.visitMaxs(0, 0); method.visitEnd(); clazz.methods.add(method); } /** ADD GETTER FOR RECENTLY HIT **/ { MethodNode method = new MethodNode(Opcodes.ACC_PUBLIC, "_SAP_getRecentlyHit", "()I", null, null); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitFieldInsn(Opcodes.GETFIELD, "net/minecraft/entity/EntityLivingBase", ASMNames.F_recentlyHit, "I"); method.visitInsn(Opcodes.IRETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("this", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l1, 0); method.visitMaxs(0, 0); method.visitEnd(); clazz.methods.add(method); } /** ADD SETTER FOR RECENTLY HIT **/ { MethodNode method = new MethodNode(Opcodes.ACC_PUBLIC, "_SAP_setRecentlyHit", "(I)V", null, null); method.visitCode(); Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 0); method.visitVarInsn(Opcodes.ILOAD, 1); method.visitFieldInsn(Opcodes.PUTFIELD, "net/minecraft/entity/EntityLivingBase", ASMNames.F_recentlyHit, "I"); Label l1 = new Label(); method.visitLabel(l1); method.visitInsn(Opcodes.RETURN); Label l2 = new Label(); method.visitLabel(l2); method.visitLocalVariable("this", "Lnet/minecraft/entity/EntityLivingBase;", null, l0, l2, 0); method.visitLocalVariable("hit", "I", null, l0, l2, 1); method.visitMaxs(0, 0); method.visitEnd(); clazz.methods.add(method); } bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS); return bytes; }
From source file:de.sanandrew.core.manpack.transformer.TransformEntityCollision.java
License:Creative Commons License
private static byte[] transformEntity(byte[] bytes) { ClassNode clazz = ASMHelper.createClassNode(bytes); MethodNode method = ASMHelper.getMethodNode(Opcodes.ACC_PUBLIC, ASMNames.MD_SAP_ENTITY_GET_BOUNDING_BOX); method.visitCode();/*from w ww .ja v a 2s . co m*/ Label l0 = new Label(); method.visitLabel(l0); method.visitVarInsn(Opcodes.ALOAD, 2); method.visitInsn(Opcodes.ARETURN); Label l1 = new Label(); method.visitLabel(l1); method.visitLocalVariable("this", ASMNames.CL_T_ENTITY, null, l0, l1, 0); method.visitLocalVariable("entity", ASMNames.CL_T_ENTITY, null, l0, l1, 1); method.visitLocalVariable("oldAABB", ASMNames.CL_T_AXIS_ALIGNED_BB, null, l0, l1, 2); method.visitMaxs(1, 2); method.visitEnd(); clazz.methods.add(method); bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS); return bytes; }