Example usage for org.objectweb.asm MethodVisitor visitMaxs

List of usage examples for org.objectweb.asm MethodVisitor visitMaxs

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitMaxs.

Prototype

public void visitMaxs(final int maxStack, final int maxLocals)

Source Link

Document

Visits the maximum stack size and the maximum number of local variables of the method.

Usage

From source file:net.sourceforge.cobertura.instrument.pass3.FastArrayCodeProvider.java

License:GNU General Public License

public void generateCoberturaGetAndResetCountersMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC,
            COBERTURA_GET_AND_RESET_COUNTERS_METHOD_NAME, "()[I", null, null);
    mv.visitCode();/*w w  w . ja va 2s  .c  om*/
    /*cobertura_counters.*/
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(Opcodes.ASTORE, 0);
    /*cobertura_counters.*/
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitInsn(Opcodes.ARRAYLENGTH);

    mv.visitIntInsn(Opcodes.NEWARRAY, Opcodes.T_INT);
    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(0, 0);//will be recalculated by writer
    mv.visitEnd();
}

From source file:net.sourceforge.cobertura.instrument.pass3.InjectCodeClassInstrumenter.java

License:GNU General Public License

/**
 * <p>If there was no 'static initialization block' in the class, the method is responsible for generating the method.<br/>
 * It is also responsible for generating method that keeps mapping of counterIds into source places connected to them</p>
 */// w w  w  .  ja  v  a 2s.  co m
@Override
public void visitEnd() {
    if (!wasStaticInitMethodVisited) {
        //We need to generate new method
        MethodVisitor mv = super.visitMethod(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
        mv.visitCode();
        codeProvider.generateCallCoberturaInitMethod(mv, classMap.getClassName());
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(/*stack*/3, /*local*/0);
        mv.visitEnd();
        wasStaticInitMethodVisited = true;
    }

    codeProvider.generateCoberturaInitMethod(cv, classMap.getClassName(), classMap.getMaxCounterId() + 1);
    codeProvider.generateCoberturaClassMapMethod(cv, classMap);
    codeProvider.generateCoberturaGetAndResetCountersMethod(cv, classMap.getClassName());

    super.visitEnd();
}

From source file:net.sourceforge.cobertura.instrument.pass3.TestUnitCodeProvider.java

License:GNU General Public License

/**
 * Generates:/*from   w  w  w.  ja v  a2s  .  c  o  m*/
 *   public static TestUnitInformationHolder[] __cobertura_get_and_reset_counters()
 *   {
 *     TestUnitInformationHolder[] local = __cobertura_counters;
 *     __cobertura_counters = new TestUnitInformationHolder[__cobertura_counters.length];
 *     return local;
 *   }
 */
public void generateCoberturaGetAndResetCountersMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC,
            COBERTURA_GET_AND_RESET_COUNTERS_METHOD_NAME, "()" + COBERTURA_COUNTERS_FIELD_TYPE, null, null);
    mv.visitCode();
    /*cobertura_counters.*/
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(Opcodes.ASTORE, 0);
    /*cobertura_counters.*/
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitInsn(Opcodes.ARRAYLENGTH);

    mv.visitTypeInsn(Opcodes.ANEWARRAY, Type.getInternalName(TestUnitInformationHolder.class));
    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(0, 0);//will be recalculated by writer
    mv.visitEnd();
}

From source file:net.techcable.event4j.asm.ASMEventExecutorFactory.java

License:Open Source License

private static byte[] generateEventExecutor(Method m, String name) {
    final boolean staticMethod = Modifier.isStatic(m.getModifiers());
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
    writer.visit(V1_8, ACC_PUBLIC, name, null, "java/lang/Object",
            new String[] { Type.getInternalName(EventExecutor.class) });
    // Generate constructor
    MethodVisitor methodGenerator = writer.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    methodGenerator.visitVarInsn(ALOAD, 0);
    methodGenerator.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); // Invoke the super class (Object) constructor
    methodGenerator.visitInsn(RETURN);//from   w  w w .  j  a  va 2  s.c o m
    methodGenerator.visitMaxs(1, 1);
    methodGenerator.visitEnd();
    // Generate the execute method
    methodGenerator = writer.visitMethod(ACC_PUBLIC, "fire", "(Ljava/lang/Object;Ljava/lang/Object;)V", null,
            null);
    if (!staticMethod) {
        methodGenerator.visitVarInsn(ALOAD, 1);
        methodGenerator.visitTypeInsn(CHECKCAST, Type.getInternalName(m.getDeclaringClass()));
    }
    methodGenerator.visitVarInsn(ALOAD, 2);
    methodGenerator.visitTypeInsn(CHECKCAST, Type.getInternalName(m.getParameterTypes()[0]));
    methodGenerator.visitMethodInsn(staticMethod ? INVOKESTATIC : INVOKEVIRTUAL,
            Type.getInternalName(m.getDeclaringClass()), m.getName(), Type.getMethodDescriptor(m),
            m.getDeclaringClass().isInterface());
    if (m.getReturnType() != void.class) {
        methodGenerator.visitInsn(POP);
    }
    methodGenerator.visitInsn(RETURN);
    methodGenerator.visitMaxs(staticMethod ? 1 : 2, 3);
    methodGenerator.visitEnd();
    writer.visitEnd();
    return writer.toByteArray();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

private static void insertConstructor(ClassWriter cw, String baseName) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();/*from w w  w .j av  a  2  s .  co  m*/
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, baseName, "<init>", "()V", false);
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

private static void insertNewRawInstance(ClassWriter cw, String classNameInternal) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS, "newInstance", "()Ljava/lang/Object;", null, null);
    mv.visitCode();/*  w  w  w .  ja  va  2  s .  c  om*/
    mv.visitTypeInsn(NEW, classNameInternal);
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, classNameInternal, "<init>", "()V", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

private static void insertNewInstance(ClassWriter cw, String classNameInternal, ClassInfo info) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS, "newInstance", "(I[Ljava/lang/Object;)Ljava/lang/Object;",
            null, null);//  www . ja v a2  s.  c  o m
    mv.visitCode();

    int n = info.constructorModifiers.length;

    if (n != 0) {
        mv.visitVarInsn(ILOAD, 1);
        Label[] labels = new Label[n];
        for (int i = 0; i < n; i++)
            labels[i] = new Label();
        Label defaultLabel = new Label();
        mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);

        StringBuilder buffer = new StringBuilder(128);
        for (int i = 0; i < n; i++) {
            mv.visitLabel(labels[i]);
            if (i == 0)
                mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { classNameInternal }, 0, null);
            else
                mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);

            mv.visitTypeInsn(NEW, classNameInternal);
            mv.visitInsn(DUP);

            buffer.setLength(0);
            buffer.append('(');

            Class<?>[] paramTypes = info.constructorParameterTypes[i];
            for (int paramIndex = 0; paramIndex < paramTypes.length; paramIndex++) {
                mv.visitVarInsn(ALOAD, 2);
                mv.visitIntInsn(BIPUSH, paramIndex);
                mv.visitInsn(AALOAD);
                Type paramType = Type.getType(paramTypes[paramIndex]);
                unbox(mv, paramType);
                buffer.append(paramType.getDescriptor());
            }
            buffer.append(")V");
            mv.visitMethodInsn(INVOKESPECIAL, classNameInternal, "<init>", buffer.toString(), false);
            mv.visitInsn(ARETURN);
        }
        mv.visitLabel(defaultLabel);
        mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    }
    mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    mv.visitInsn(DUP);
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Constructor not found: ");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
            false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

private static void insertInvoke(ClassWriter cw, String classNameInternal, List<Method> methods) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS, "invoke",
            "(Ljava/lang/Object;I[Ljava/lang/Object;)Ljava/lang/Object;", null, null);
    mv.visitCode();/*from w  w  w .j ava2 s  . c o m*/

    int n = methods.size();

    if (n != 0) {
        mv.visitVarInsn(ILOAD, 2);
        Label[] labels = new Label[n];
        for (int i = 0; i < n; i++)
            labels[i] = new Label();
        Label defaultLabel = new Label();
        mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);

        StringBuilder buffer = new StringBuilder(128);
        for (int i = 0; i < n; i++) {
            Method method = methods.get(i);
            boolean isInterface = method.getDeclaringClass().isInterface();
            boolean isStatic = isStatic(method.getModifiers());

            mv.visitLabel(labels[i]);
            if (i == 0)
                mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { classNameInternal }, 0, null);
            else
                mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);

            if (!isStatic) {
                mv.visitVarInsn(ALOAD, 1);
                mv.visitTypeInsn(CHECKCAST, classNameInternal);
            }

            buffer.setLength(0);
            buffer.append('(');

            String methodName = method.getName();
            Class<?>[] paramTypes = method.getParameterTypes();
            Class<?> returnType = method.getReturnType();
            for (int paramIndex = 0; paramIndex < paramTypes.length; paramIndex++) {
                mv.visitVarInsn(ALOAD, 3);
                mv.visitIntInsn(BIPUSH, paramIndex);
                mv.visitInsn(AALOAD);
                Type paramType = Type.getType(paramTypes[paramIndex]);
                unbox(mv, paramType);
                buffer.append(paramType.getDescriptor());
            }

            buffer.append(')');
            buffer.append(Type.getDescriptor(returnType));
            final int inv = isInterface ? INVOKEINTERFACE : (isStatic ? INVOKESTATIC : INVOKEVIRTUAL);
            mv.visitMethodInsn(inv, classNameInternal, methodName, buffer.toString(), isInterface);

            final Type retType = Type.getType(returnType);
            box(mv, retType);
            mv.visitInsn(ARETURN);
        }

        mv.visitLabel(defaultLabel);
        mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    }
    mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    mv.visitInsn(DUP);
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Method not found: ");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitVarInsn(ILOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
            false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

static private void insertSetObject(ClassWriter cw, String classNameInternal, List<Field> fields) {
    int maxStack = 6;
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "set", "(Ljava/lang/Object;ILjava/lang/Object;)V", null,
            null);//  ww  w  . j  av  a 2  s .co  m
    mv.visitCode();
    mv.visitVarInsn(ILOAD, 2);

    if (!fields.isEmpty()) {
        maxStack--;
        Label[] labels = new Label[fields.size()];
        for (int i = 0, n = labels.length; i < n; i++)
            labels[i] = new Label();
        Label defaultLabel = new Label();
        mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);

        for (int i = 0, n = labels.length; i < n; i++) {
            Field field = fields.get(i);
            Type fieldType = Type.getType(field.getType());
            boolean st = isStatic(field.getModifiers());

            mv.visitLabel(labels[i]);
            mv.visitFrame(F_SAME, 0, null, 0, null);
            if (!st) {
                mv.visitVarInsn(ALOAD, 1);
                mv.visitTypeInsn(CHECKCAST, classNameInternal);
            }
            mv.visitVarInsn(ALOAD, 3);

            unbox(mv, fieldType);

            mv.visitFieldInsn(st ? PUTSTATIC : PUTFIELD, classNameInternal, field.getName(),
                    fieldType.getDescriptor());
            mv.visitInsn(RETURN);
        }

        mv.visitLabel(defaultLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);
    }
    mv = insertThrowExceptionForFieldNotFound(mv);
    mv.visitMaxs(maxStack, 4);
    mv.visitEnd();
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

static private void insertGetObject(ClassWriter cw, String classNameInternal, List<Field> fields) {
    int maxStack = 6;
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "get", "(Ljava/lang/Object;I)Ljava/lang/Object;", null, null);
    mv.visitCode();/* w w  w  .ja v a2 s. co m*/
    mv.visitVarInsn(ILOAD, 2);

    if (!fields.isEmpty()) {
        maxStack--;
        Label[] labels = new Label[fields.size()];
        for (int i = 0, n = labels.length; i < n; i++)
            labels[i] = new Label();
        Label defaultLabel = new Label();
        mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);

        for (int i = 0, n = labels.length; i < n; i++) {
            Field field = fields.get(i);
            mv.visitLabel(labels[i]);
            mv.visitFrame(F_SAME, 0, null, 0, null);
            if (isStatic(field.getModifiers())) {
                mv.visitFieldInsn(GETSTATIC, classNameInternal, field.getName(),
                        Type.getDescriptor(field.getType()));
            } else {
                mv.visitVarInsn(ALOAD, 1);
                mv.visitTypeInsn(CHECKCAST, classNameInternal);
                mv.visitFieldInsn(GETFIELD, classNameInternal, field.getName(),
                        Type.getDescriptor(field.getType()));
            }
            Type fieldType = Type.getType(field.getType());
            box(mv, fieldType);
            mv.visitInsn(ARETURN);
        }
        mv.visitLabel(defaultLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);
    }
    insertThrowExceptionForFieldNotFound(mv);
    mv.visitMaxs(maxStack, 3);
    mv.visitEnd();
}