Examples of org.ow2.asm.MethodVisitor

org.ow2.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitFrame | visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | visitLineNumber)* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, visitTryCatchBlock must be called before the labels passed as arguments have been visited, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

        } catch (Exception e) {
        }
    }


    public void testIllegalMultiANewArrayDesc() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitMultiANewArrayInsn("I", 1);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalMultiANewArrayDims() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitMultiANewArrayInsn("[[I", 0);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalMultiANewArrayDims2() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitMultiANewArrayInsn("[[I", 3);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalTryCatchBlock() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        Label m = new Label();
        Label n = new Label();
        mv.visitLabel(m);
        try {
            mv.visitTryCatchBlock(m, n, n, null);
            fail();
        } catch (Exception e) {
        }        
        try {
            mv.visitTryCatchBlock(n, m, n, null);
            fail();
        } catch (Exception e) {
        }        
        try {
            mv.visitTryCatchBlock(n, n, m, null);
            fail();
        } catch (Exception e) {
        }        
    }

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        } catch (Exception e) {
        }        
    }
    
    public void testIllegalDataflow() {
        MethodVisitor mv = new CheckMethodAdapter(ACC_PUBLIC,
                "m",
                "(I)V",
                new EmptyVisitor(),
                new HashMap<Label, Integer>());
        mv.visitCode();
        mv.visitVarInsn(ILOAD, 1);
        mv.visitInsn(IRETURN);
        mv.visitMaxs(1, 2);
        try {
            mv.visitEnd();
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }
    
    public void testIllegalDataflow2() {
        MethodVisitor mv = new CheckMethodAdapter(ACC_PUBLIC,
                "m",
                "(I)I",
                new EmptyVisitor(),
                new HashMap<Label, Integer>());
        mv.visitCode();
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 2);
        try {
            mv.visitEnd();
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalLocalVariableLabels() {
        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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        } catch (Exception e) {
        }
    }


    public void testIllegalLineNumerLabel() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitLineNumber(0, new Label());
            fail();
        } catch (Exception e) {
        }
    }

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                "J",
                null,
                new Long(1L));
        fv.visitEnd();


        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
                "<init>",
                "()V",
                null,
                null);
        mv.visitCode();
        Label l0 = new Label();
        Label l1 = new Label();
        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);
        mv.visitLabel(l2);
        mv.visitLocalVariable("this", "Lpkg/Debug;", "Lpkg/Debug;", l0, l2, 0);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        cw.visitEnd();


        return cw.toByteArray();
    }

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        } catch (Exception e) {
        }
    }


    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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