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

org.ow2.asm.MethodVisitor.visitVarInsn()
Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable. @param opcode the opcode of the local variable instruction to be visited.This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET. @param var the operand of the instruction to be visited. This operand isthe index of a local variable.

        Label l3 = new Label();
        mv.visitVarInsn(ILOAD, 1);
        mv.visitTableSwitchInsn(0, 2, l3/*default*/, l1, l2, l3 );
        mv.visitLabel(l1);
        mv.visitInsn(ICONST_1);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l3);
        mv.visitLabel(l2);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l3);

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        mv.visitInsn(ICONST_1);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l3);
        mv.visitLabel(l2);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l3);
        mv.visitLabel(l3);
        mv.visitVarInsn(ILOAD, 7);
        // lookupswitch
        Label l4 = new Label();

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        mv.visitLabel(l2);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l3);
        mv.visitLabel(l3);
        mv.visitVarInsn(ILOAD, 7);
        // lookupswitch
        Label l4 = new Label();
        Label l5 = new Label();
        Label l6 = new Label();
        mv.visitVarInsn(ILOAD, 1);

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        mv.visitVarInsn(ILOAD, 7);
        // lookupswitch
        Label l4 = new Label();
        Label l5 = new Label();
        Label l6 = new Label();
        mv.visitVarInsn(ILOAD, 1);
        mv.visitLookupSwitchInsn(l6, new int[] { 0, 1, 2 }, new Label[] {
            l4,
            l5,
            l6 });
        mv.visitLabel(l4);

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            l4,
            l5,
            l6 });
        mv.visitLabel(l4);
        mv.visitInsn(ICONST_1);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l6);
        mv.visitLabel(l5);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l6);

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        mv.visitInsn(ICONST_1);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l6);
        mv.visitLabel(l5);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l6);
        mv.visitLabel(l6);
        mv.visitVarInsn(ILOAD, 7);
        // throw
        mv.visitInsn(ACONST_NULL);

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    public void testVerifyInvalidClass() {
        ClassWriter cw = new ClassWriter(0);
        cw.visit(V1_1, ACC_PUBLIC, "C", null, "java/lang/Object", null);
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "m", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ISTORE, 30);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 31);
        mv.visitEnd();
        cw.visitEnd();

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        mv.visitLabel(l5);
        mv.visitInsn(ICONST_2);
        mv.visitVarInsn(ISTORE, 7);
        mv.visitJumpInsn(GOTO, l6);
        mv.visitLabel(l6);
        mv.visitVarInsn(ILOAD, 7);
        // throw
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ATHROW);
        // misc instructions to cover code in MethodWriter.resizeInsns
        mv.visitLabel(l0);

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        ClassWriter cw = new ClassWriter(0);
        cw.visit(V1_1, ACC_PUBLIC, "C", null, "java/lang/Object", null);
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "m", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ISTORE, 30);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 31);
        mv.visitEnd();
        cw.visitEnd();
        ClassReader cr = new ClassReader(cw.toByteArray());

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        // misc instructions to cover code in MethodWriter.resizeInsns
        mv.visitLabel(l0);
        mv.visitInsn(ICONST_1);
        mv.visitInsn(ICONST_2);
        mv.visitMultiANewArrayInsn("[[I", 2);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()V");
        // end method
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();

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