Examples with Label org.apache.xbean.asm5.Label used on opensource projects

Example 1 with Label

use of org.apache.xbean.asm5.Label in project jodd by oblac.

the class ProxettaAsmUtil method visitReturn.

// ---------------------------------------------------------------- return
/**
	 * Visits return opcodes.
	 */
public static void visitReturn(MethodVisitor mv, MethodInfo methodInfo, boolean isLast) {
    switch(methodInfo.getReturnOpcodeType()) {
        case 'V':
            if (isLast) {
                mv.visitInsn(POP);
            }
            mv.visitInsn(RETURN);
            break;
        case 'B':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(ICONST_0);
                mv.visitInsn(IRETURN);
                mv.visitLabel(label);
                AsmUtil.byteValue(mv);
            }
            mv.visitInsn(IRETURN);
            break;
        case 'C':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(ICONST_0);
                mv.visitInsn(IRETURN);
                mv.visitLabel(label);
                AsmUtil.charValue(mv);
            }
            mv.visitInsn(IRETURN);
            break;
        case 'S':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(ICONST_0);
                mv.visitInsn(IRETURN);
                mv.visitLabel(label);
                AsmUtil.shortValue(mv);
            }
            mv.visitInsn(IRETURN);
            break;
        case 'I':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(ICONST_0);
                mv.visitInsn(IRETURN);
                mv.visitLabel(label);
                AsmUtil.intValue(mv);
            }
            mv.visitInsn(IRETURN);
            break;
        case 'Z':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(ICONST_0);
                mv.visitInsn(IRETURN);
                mv.visitLabel(label);
                AsmUtil.booleanValue(mv);
            }
            mv.visitInsn(IRETURN);
            break;
        case 'J':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(LCONST_0);
                mv.visitInsn(LRETURN);
                mv.visitLabel(label);
                AsmUtil.longValue(mv);
            }
            mv.visitInsn(LRETURN);
            break;
        case 'F':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(FCONST_0);
                mv.visitInsn(FRETURN);
                mv.visitLabel(label);
                AsmUtil.floatValue(mv);
            }
            mv.visitInsn(FRETURN);
            break;
        case 'D':
            if (isLast) {
                mv.visitInsn(DUP);
                Label label = new Label();
                mv.visitJumpInsn(IFNONNULL, label);
                mv.visitInsn(POP);
                mv.visitInsn(DCONST_0);
                mv.visitInsn(DRETURN);
                mv.visitLabel(label);
                AsmUtil.doubleValue(mv);
            }
            mv.visitInsn(DRETURN);
            break;
        default:
            mv.visitInsn(ARETURN);
            break;
    }
}

Example 2 with Label

use of org.apache.xbean.asm5.Label in project intellij-community by JetBrains.

the class AdvancedEnhancer method emitBindCallbacks.

private void emitBindCallbacks(ClassEmitter ce) {
    CodeEmitter e = ce.begin_method(Constants.PRIVATE_FINAL_STATIC, BIND_CALLBACKS, null);
    Local me = e.make_local();
    e.load_arg(0);
    e.checkcast_this();
    e.store_local(me);
    $Label end = e.make_label();
    e.load_local(me);
    e.getfield(BOUND_FIELD);
    e.if_jump(e.NE, end);
    e.load_local(me);
    e.push(1);
    e.putfield(BOUND_FIELD);
    e.getfield(THREAD_CALLBACKS_FIELD);
    e.invoke_virtual(THREAD_LOCAL, THREAD_LOCAL_GET);
    e.dup();
    $Label found_callback = e.make_label();
    e.ifnonnull(found_callback);
    e.pop();
    e.getfield(STATIC_CALLBACKS_FIELD);
    e.dup();
    e.ifnonnull(found_callback);
    e.pop();
    e.goTo(end);
    e.mark(found_callback);
    e.checkcast(CALLBACK_ARRAY);
    e.load_local(me);
    e.swap();
    for (int i = callbackTypes.length - 1; i >= 0; i--) {
        if (i != 0) {
            e.dup2();
        }
        e.aaload(i);
        e.checkcast(callbackTypes[i]);
        e.putfield(getCallbackField(i));
    }
    e.mark(end);
    e.return_value();
    e.end_method();
}

Example 3 with Label

use of org.apache.xbean.asm5.Label in project tomee by apache.

the class Cmp2Generator method createOpenEJB_removeCmr.

//    private void createPrintln(MethodVisitor mv, String message) {
//        mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
//        mv.visitLdcInsn(message);
//        mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
//    }
//    private void createPrintField(MethodVisitor mv, String fieldName, String descriptor) {
//        mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
//        mv.visitLdcInsn(fieldName + "=");
//        mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V");
//
//        mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
//        mv.visitVarInsn(ALOAD, 0);
//        mv.visitFieldInsn(GETFIELD, implClassName, fieldName, descriptor);
//        mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/Object;)V");
//    }
/**
     * Emit the remove logic for an individual CMR field.
     * Like the addCmr logic, each field is guarded by an
     * if test on the property name.
     *
     * @param mv
     * @param cmrField
     */
private void createOpenEJB_removeCmr(final MethodVisitor mv, final CmrField cmrField) {
    // if (${cmrField.name}.equals(arg1))
    mv.visitLdcInsn(cmrField.getName());
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
    // if not equal jump to end
    final Label end = new Label();
    mv.visitJumpInsn(IFEQ, end);
    // collection valued CMR field.  Remove the object from the collection. 
    if (cmrField.getCmrStyle() != CmrStyle.SINGLE) {
        // ${cmrField.name}.remove(arg2)
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEINTERFACE, cmrField.getCmrStyle().getCollectionType().getInternalName(), "remove", "(Ljava/lang/Object;)Z", true);
        mv.visitInsn(POP);
        // return;
        mv.visitInsn(RETURN);
    } else {
        // single valued, so just null out the field. 
        // this.${cmrField.name} = null;
        mv.visitVarInsn(ALOAD, 0);
        mv.visitInsn(ACONST_NULL);
        mv.visitFieldInsn(PUTFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        // return;
        mv.visitInsn(RETURN);
    }
    // end of if statement
    mv.visitLabel(end);
}

Example 4 with Label

use of org.apache.xbean.asm5.Label in project tomee by apache.

the class MakeTxLookup method createNewHibernateStrategy.

private static void createNewHibernateStrategy(final File basedir, final String target, final String abstractJtaPlatformPackage) throws Exception {
    final ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;
    cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, target.replace('.', '/'), null, abstractJtaPlatformPackage + "/AbstractJtaPlatform", null);
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, abstractJtaPlatformPackage + "/AbstractJtaPlatform", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PROTECTED, "locateTransactionManager", "()Ljavax/transaction/TransactionManager;", null, null);
        mv.visitCode();
        mv.visitMethodInsn(INVOKESTATIC, "org/apache/openejb/OpenEJB", "getTransactionManager", "()Ljavax/transaction/TransactionManager;", false);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PROTECTED, "locateUserTransaction", "()Ljavax/transaction/UserTransaction;", null, null);
        mv.visitCode();
        final Label l0 = new Label();
        final Label l1 = new Label();
        final Label l2 = new Label();
        mv.visitTryCatchBlock(l0, l1, l2, "javax/naming/NamingException");
        mv.visitLabel(l0);
        mv.visitMethodInsn(INVOKESTATIC, "org/apache/openejb/loader/SystemInstance", "get", "()Lorg/apache/openejb/loader/SystemInstance;", false);
        mv.visitLdcInsn(Type.getType("Lorg/apache/openejb/spi/ContainerSystem;"));
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/openejb/loader/SystemInstance", "getComponent", "(Ljava/lang/Class;)Ljava/lang/Object;", false);
        mv.visitTypeInsn(CHECKCAST, "org/apache/openejb/spi/ContainerSystem");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/apache/openejb/spi/ContainerSystem", "getJNDIContext", "()Ljavax/naming/Context;", true);
        mv.visitLdcInsn("comp/UserTransaction");
        mv.visitMethodInsn(INVOKEINTERFACE, "javax/naming/Context", "lookup", "(Ljava/lang/String;)Ljava/lang/Object;", true);
        mv.visitTypeInsn(CHECKCAST, "javax/transaction/UserTransaction");
        mv.visitLabel(l1);
        mv.visitInsn(ARETURN);
        mv.visitLabel(l2);
        mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { "javax/naming/NamingException" });
        mv.visitVarInsn(ASTORE, 1);
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
    }
    cw.visitEnd();
    write(basedir, cw, target.replace('.', '/'));
}

Example 5 with Label

use of org.apache.xbean.asm5.Label in project jodd by oblac.

the class ProxyAspectData method readAdviceData.

// ---------------------------------------------------------------- read
/**
	 * Parse advice class to gather some advice data. Should be called before any advice use.
	 * Must be called only *once* per advice.
	 */
private void readAdviceData() {
    if (ready) {
        return;
    }
    adviceClassReader.accept(new EmptyClassVisitor() {

        /**
			 * Stores advice reference.
			 */
        @Override
        public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
            adviceReference = name;
            super.visit(version, access, name, signature, superName, interfaces);
        }

        /**
			 * Prevents advice to have inner classes.
			 */
        @Override
        public void visitInnerClass(String name, String outerName, String innerName, int access) {
            if (outerName.equals(adviceReference)) {
                throw new ProxettaException("Proxetta doesn't allow inner classes in/for advice: " + advice.getName());
            }
            super.visitInnerClass(name, outerName, innerName, access);
        }

        /**
			 * Clones advices fields to destination.
			 */
        @Override
        public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
            // [A5]
            wd.dest.visitField(access, adviceFieldName(name, aspectIndex), desc, signature, value);
            return super.visitField(access, name, desc, signature, value);
        }

        /**
			 * Copies advices methods to destination.
			 */
        @Override
        public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
            if (name.equals(CLINIT)) {
                // [A6]
                if (!desc.equals(DESC_VOID)) {
                    throw new ProxettaException("Invalid static initialization block description for advice: " + advice.getName());
                }
                name = clinitMethodName + methodDivider + aspectIndex;
                access |= AsmUtil.ACC_PRIVATE | AsmUtil.ACC_FINAL;
                wd.addAdviceClinitMethod(name);
                return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {

                    @Override
                    public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
                    }

                    @Override
                    public void visitLineNumber(int line, Label start) {
                    }

                    @Override
                    public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
                        if (opcode == INVOKESTATIC) {
                            if (owner.equals(adviceReference)) {
                                owner = wd.thisReference;
                                name = adviceMethodName(name, aspectIndex);
                            }
                        }
                        super.visitMethodInsn(opcode, owner, name, desc, isInterface);
                    }

                    @Override
                    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                        // [F6]
                        if (owner.equals(adviceReference)) {
                            // [F5]
                            owner = wd.thisReference;
                            name = adviceFieldName(name, aspectIndex);
                        }
                        super.visitFieldInsn(opcode, owner, name, desc);
                    }
                };
            } else if (name.equals(INIT)) {
                // [A7]
                if (!desc.equals(DESC_VOID)) {
                    throw new ProxettaException("Advices can have only default constructors. Invalid advice: " + advice.getName());
                }
                name = initMethodName + methodDivider + aspectIndex;
                access = ProxettaAsmUtil.makePrivateFinalAccess(access);
                wd.addAdviceInitMethod(name);
                return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {

                    @Override
                    public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
                    }

                    @Override
                    public void visitLineNumber(int line, Label start) {
                    }

                    // used to detect and to ignore the first super call()
                    int state;

                    @Override
                    public void visitVarInsn(int opcode, int var) {
                        // [F7]
                        if ((state == 0) && (opcode == ALOAD) && (var == 0)) {
                            state++;
                            return;
                        }
                        super.visitVarInsn(opcode, var);
                    }

                    @Override
                    public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
                        if ((state == 1) && (opcode == INVOKESPECIAL)) {
                            state++;
                            return;
                        }
                        if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE)) {
                            if (owner.equals(adviceReference)) {
                                owner = wd.thisReference;
                                name = adviceMethodName(name, aspectIndex);
                            }
                        } else if (opcode == INVOKESTATIC) {
                            if (owner.equals(adviceReference)) {
                                owner = wd.thisReference;
                                name = adviceMethodName(name, aspectIndex);
                            }
                        }
                        super.visitMethodInsn(opcode, owner, name, desc, isInterface);
                    }

                    @Override
                    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                        // [F7]
                        if (owner.equals(adviceReference)) {
                            // [F5]
                            owner = wd.thisReference;
                            name = adviceFieldName(name, aspectIndex);
                        }
                        super.visitFieldInsn(opcode, owner, name, desc);
                    }
                };
            } else // other methods
            if (!name.equals(executeMethodName)) {
                name = adviceMethodName(name, aspectIndex);
                return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {

                    @Override
                    public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
                    }

                    @Override
                    public void visitLineNumber(int line, Label start) {
                    }

                    @Override
                    public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
                        if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE)) {
                            if (owner.equals(adviceReference)) {
                                owner = wd.thisReference;
                                name = adviceMethodName(name, aspectIndex);
                            }
                        } else if (opcode == INVOKESTATIC || opcode == INVOKESPECIAL) {
                            if (owner.equals(adviceReference)) {
                                owner = wd.thisReference;
                                name = adviceMethodName(name, aspectIndex);
                            }
                        }
                        super.visitMethodInsn(opcode, owner, name, desc, isInterface);
                    }

                    @Override
                    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                        // replace field references
                        if (owner.equals(adviceReference)) {
                            owner = wd.thisReference;
                            name = adviceFieldName(name, aspectIndex);
                        }
                        super.visitFieldInsn(opcode, owner, name, desc);
                    }
                };
            }
            //return new MethodAdapter(new EmptyMethodVisitor()) {		// toask may we replace this with the following code?
            return new EmptyMethodVisitor() {

                @Override
                public void visitVarInsn(int opcode, int var) {
                    if (isStoreOpcode(opcode)) {
                        if (var > maxLocalVarOffset) {
                            // find max local var offset
                            maxLocalVarOffset = var;
                        }
                    }
                    super.visitVarInsn(opcode, var);
                }
            };
        //					return super.visitMethod(access, name, desc, signature, exceptions);
        }
    }, 0);
    // increment offset by 2 because var on last index may be a dword value
    maxLocalVarOffset += 2;
    ready = true;
}