Examples of org.objectweb.asm.CodeVisitor.visitLabel()

org.objectweb.asm.CodeVisitor.visitLabel()
Visits a label. A label designates the instruction that will be visited just after it. @param label a {@link Label Label} object.

        for (int i = 0; i < returnLabels.length; i++) {
            returnLabels[i] = new Label();
        }


        // start try-catch block
        cv.visitLabel(tryLabel);


        // start the switch block and set the stackframe as the param to the switch
        cv.visitVarInsn(ALOAD, 0);
        cv.visitFieldInsn(GETFIELD, m_joinPointClassName, STACK_FRAME_COUNTER_FIELD_NAME, I);
        cv.visitLookupSwitchInsn(defaultCaseLabel, caseNumbers, caseLabels);

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        cv.visitFieldInsn(GETFIELD, m_joinPointClassName, STACK_FRAME_COUNTER_FIELD_NAME, I);
        cv.visitLookupSwitchInsn(defaultCaseLabel, caseNumbers, caseLabels);


        // add one case for each around advice invocation
        for (int i = 0; i < m_aroundAdviceMethodInfos.length; i++) {
            cv.visitLabel(caseLabels[i]);


            // gather advice info
            AdviceMethodInfo adviceInfo = m_aroundAdviceMethodInfos[i];


            Label endInstanceOflabel = beginRuntimeCheck(cv, false, 0, adviceInfo.getAdviceInfo(), -1);

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                cv.visitJumpInsn(GOTO, elseInstanceOfLabel);
                endRuntimeCheck(cv, adviceInfo.getAdviceInfo(), endInstanceOflabel);
                cv.visitVarInsn(ALOAD, 0);
                cv.visitMethodInsn(INVOKESPECIAL, m_joinPointClassName, PROCEED_METHOD_NAME, PROCEED_METHOD_SIGNATURE);
                cv.visitVarInsn(ASTORE, 1);
                cv.visitLabel(elseInstanceOfLabel);
            }


            cv.visitLabel(returnLabels[i]);


            cv.visitVarInsn(ALOAD, 1);

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                cv.visitMethodInsn(INVOKESPECIAL, m_joinPointClassName, PROCEED_METHOD_NAME, PROCEED_METHOD_SIGNATURE);
                cv.visitVarInsn(ASTORE, 1);
                cv.visitLabel(elseInstanceOfLabel);
            }


            cv.visitLabel(returnLabels[i]);


            cv.visitVarInsn(ALOAD, 1);
            cv.visitInsn(ARETURN);
        }

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            cv.visitInsn(ARETURN);
        }


        if (m_isTargetAdvisable) {
            int delegationCaseIndex = caseLabels.length - 1;
            cv.visitLabel(caseLabels[delegationCaseIndex]);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitInsn(ICONST_0);
            cv.visitFieldInsn(PUTFIELD, m_joinPointClassName, INTERCEPTOR_INDEX_FIELD_NAME, I);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKEVIRTUAL, m_joinPointClassName, PROCEED_METHOD_NAME, PROCEED_METHOD_SIGNATURE);

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            cv.visitInsn(ICONST_0);
            cv.visitFieldInsn(PUTFIELD, m_joinPointClassName, INTERCEPTOR_INDEX_FIELD_NAME, I);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKEVIRTUAL, m_joinPointClassName, PROCEED_METHOD_NAME, PROCEED_METHOD_SIGNATURE);


            cv.visitLabel(returnLabels[delegationCaseIndex]);


            cv.visitInsn(ARETURN);
        }


        // invoke the target join point in the default case

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            cv.visitInsn(ARETURN);
        }


        // invoke the target join point in the default case
        cv.visitLabel(defaultCaseLabel);


        AsmHelper.prepareWrappingOfPrimitiveType(cv, Type.getReturnType(m_calleeMemberDesc));


        createJoinPointInvocation(cv);

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            cv.visitVarInsn(ALOAD, 0);
            cv.visitVarInsn(ALOAD, 1);
            cv.visitFieldInsn(PUTFIELD, m_joinPointClassName, CALLEE_INSTANCE_FIELD_NAME, m_calleeClassSignature);
        }


        cv.visitLabel(gotoLabel);


        cv.visitVarInsn(ALOAD, 1);
        cv.visitInsn(ARETURN);


        // finally clause

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        cv.visitVarInsn(ALOAD, 1);
        cv.visitInsn(ARETURN);


        // finally clause
        cv.visitLabel(handlerLabel);
        cv.visitVarInsn(ASTORE, 2);
        cv.visitLabel(endLabel);


        cv.visitVarInsn(ALOAD, 2);
        cv.visitInsn(ATHROW);

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        cv.visitInsn(ARETURN);


        // finally clause
        cv.visitLabel(handlerLabel);
        cv.visitVarInsn(ASTORE, 2);
        cv.visitLabel(endLabel);


        cv.visitVarInsn(ALOAD, 2);
        cv.visitInsn(ATHROW);


        // set up the label table

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