Examples of org.objectweb.asm.MethodVisitor.visitTryCatchBlock()

org.objectweb.asm.MethodVisitor.visitTryCatchBlock()
Visits a try catch block. @param start beginning of the exception handler's scope (inclusive). @param end end of the exception handler's scope (exclusive). @param handler beginning of the exception handler's code. @param type internal name of the type of exceptions handled by thehandler, or null to catch any exceptions (for "finally" blocks).

        mv.visitTryCatchBlock(tryCatchStart, tryEnd, catchStart, null);
        
        // Set up a try catch block so that if an exception is thrown by trying to exit 
        // the monitor in the case of an exception from the method invocation we will keep trying to 
        // exit the monitor.
        mv.visitTryCatchBlock(catchStart, exceptionMonitorExitEnd, catchStart, null);
        
        return false;
    }
    
    private static boolean encodeLabelledContinue(JavaStatement.LabelledContinue lc, GenerationContext context) {

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        Label end = new Label();
        MethodVisitor mv = mc.mv;
        mv.visitLabel(end);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Throwable", "getCause", "()Ljava/lang/Throwable;");
        mv.visitInsn(Opcodes.ATHROW);
        mv.visitTryCatchBlock(mc.tryStart, end, end, "org/perl6/nqp/runtime/JavaCallinException");
        mv.visitMaxs(0,0);
        mv.visitEnd();
    }


    /** Constructs a CallSiteDescriptor and argument array for a callback and begins the invokeDirect call. */

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                    "(Ljava/lang/String;)Ljava/lang/Class;", null, null);
            mv.visitCode();
            Label l0 = new Label();
            Label l1 = new Label();
            Label l2 = new Label();
            mv.visitTryCatchBlock(l0, l1, l2,
                    "java/lang/ClassNotFoundException");
            mv.visitLabel(l0);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class",
                    "forName", "(Ljava/lang/String;)Ljava/lang/Class;", false);

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        mv.visitInsn(DUP);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/ClassNotFoundException", "getMessage", "()Ljava/lang/String;", false);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/NoClassDefFoundError", "<init>", "(Ljava/lang/String;)V", false);
        mv.visitInsn(ATHROW);
        mv.visitTryCatchBlock(l0, l2, l2, "java/lang/ClassNotFoundException"); // br using l2 as the 2nd param seems create the right table entry
        mv.visitMaxs(3, 2);
    }


    /**
     * load class object on stack

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            }
        }


        //exception table writing
        for (ExceptionTableEntry ep : typedExceptions) {
            mv.visitTryCatchBlock(ep.start, ep.end, ep.goal, ep.sig);
        }
        //exception table writing
        for (ExceptionTableEntry ep : untypedExceptions) {
            mv.visitTryCatchBlock(ep.start, ep.end, ep.goal, ep.sig);
        }

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        for (ExceptionTableEntry ep : typedExceptions) {
            mv.visitTryCatchBlock(ep.start, ep.end, ep.goal, ep.sig);
        }
        //exception table writing
        for (ExceptionTableEntry ep : untypedExceptions) {
            mv.visitTryCatchBlock(ep.start, ep.end, ep.goal, ep.sig);
        }




        pop();
        typedExceptions.clear();

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    public void writeExceptionTable(BlockRecorder block, Label goal, String sig) {
        if (block.isEmpty) return;
        MethodVisitor mv = controller.getMethodVisitor();
        for (LabelRange range : block.ranges) {
            mv.visitTryCatchBlock(range.start, range.end, goal, sig);
        }
    }


//    public MethodVisitor getMethodVisitor() {
//        return mv;

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        mv.visitLabel(tryEnd);
        final Label catchStart = new Label();
        mv.visitLabel(catchStart);
        mv.visitMethodInsn(Opcodes.INVOKESTATIC, "org/codehaus/groovy/runtime/ScriptBytecodeAdapter", "unwrap", "(Lgroovy/lang/GroovyRuntimeException;)Ljava/lang/Throwable;", false);
        mv.visitInsn(Opcodes.ATHROW);        
        mv.visitTryCatchBlock(tryStart, tryEnd, catchStart, GRE);
        
        mv.visitMaxs(0, 0);
        mv.visitEnd();
        return mv;
    }

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    final Label finalX = new Label();


    v.visitCode();


    // support try{ get(); } finally { unget(); } model
    v.visitTryCatchBlock(start, ungetR, catchX, null);
    v.visitTryCatchBlock(ungetR, finalR, finalR, EXCEPTION_NAME);
    v.visitTryCatchBlock(ungetX, finalX, finalX, EXCEPTION_NAME);


    // store handle as "this"
    v.visitVarInsn(ALOAD, 0);

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    v.visitCode();


    // support try{ get(); } finally { unget(); } model
    v.visitTryCatchBlock(start, ungetR, catchX, null);
    v.visitTryCatchBlock(ungetR, finalR, finalR, EXCEPTION_NAME);
    v.visitTryCatchBlock(ungetX, finalX, finalX, EXCEPTION_NAME);


    // store handle as "this"
    v.visitVarInsn(ALOAD, 0);
    v.visitFieldInsn(GETFIELD, proxyName, PROXY_HANDLE, IMPORT_DESC);

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