Examples of org.ow2.asm.MethodVisitor.visitInsn()

org.ow2.asm.MethodVisitor.visitInsn()
Visits a zero operand instruction. @param opcode the opcode of the instruction to be visited. This opcode iseither NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.

        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        Label m = new Label();
        Label n = new Label();
        mv.visitLabel(n);
        mv.visitInsn(NOP);
        mv.visitLabel(m);
        try {
            mv.visitLocalVariable("i", "I", null, m, n, 0);
            fail();
        } catch (Exception e) {

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        Label l2 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(3, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(ICONST_0);
        mv.visitJumpInsn(IFEQ, l1);
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l1);
        mv.visitLineNumber(3, l1);
        mv.visitInsn(RETURN);

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    public void testIllegalInsnVisitAfterEnd() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        mv.visitMaxs(0, 0);
        try {
            mv.visitInsn(NOP);
            fail();
        } catch (Exception e) {
        }
    }
}

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        mv.visitInsn(ICONST_0);
        mv.visitJumpInsn(IFEQ, l1);
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l1);
        mv.visitLineNumber(3, l1);
        mv.visitInsn(RETURN);
        mv.visitLabel(l2);
        mv.visitLocalVariable("this", "Lpkg/Debug;", "Lpkg/Debug;", l0, l2, 0);
        mv.visitMaxs(0, 0);
        mv.visitEnd();

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        mv.visitLabel(l3);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitInsn(ATHROW);
        mv.visitLabel(l4);
        mv.visitVarInsn(ASTORE, 3);
        mv.visitInsn(DCONST_0);
        mv.visitVarInsn(DSTORE, 4);
        mv.visitVarInsn(RET, 3);
        mv.visitLabel(l5);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);

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        mv.visitVarInsn(ASTORE, 3);
        mv.visitInsn(DCONST_0);
        mv.visitVarInsn(DSTORE, 4);
        mv.visitVarInsn(RET, 3);
        mv.visitLabel(l5);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        cw.visitEnd();

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        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        mv = cw.visitMethod(ACC_PUBLIC, "backwardJSR", "([I)V", null, null);
        mv.visitCode();

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        Label l4 = new Label();
        Label l5 = new Label();
        Label l6 = new Label();
        mv.visitTryCatchBlock(l0, l1, l2, null);
        mv.visitTryCatchBlock(l2, l3, l2, null);
        mv.visitInsn(ICONST_0);
        mv.visitVarInsn(ISTORE, 4);
        mv.visitJumpInsn(GOTO, l0);
        mv.visitLabel(l4);
        mv.visitVarInsn(ASTORE, 3);
        mv.visitIincInsn(4, 1);

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        mv.visitIincInsn(4, 1);
        mv.visitVarInsn(RET, 3);


        /* extra instructions only used to trigger method resizing */
        mv.visitLabel(l0);
        mv.visitInsn(ACONST_NULL);
        mv.visitJumpInsn(IFNULL, l6); // will give wide IFNULL
        // many NOPs will be introduced here by the method resizing test
        mv.visitJumpInsn(GOTO, l6);
        mv.visitLabel(l6);

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        mv.visitLabel(l2);
        mv.visitVarInsn(ASTORE, 2);
        mv.visitJumpInsn(JSR, l4);
        mv.visitLabel(l3);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitInsn(ATHROW);
        mv.visitLabel(l5);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();

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