Package org.apache.bcel.verifier.structurals

Class Pass3bVerifier

java.lang.Object

org.apache.bcel.verifier.PassVerifier

org.apache.bcel.verifier.structurals.Pass3bVerifier

public final class Pass3bVerifier
extends PassVerifier

This PassVerifier verifies a method of class file according to pass 3, so-called structural verification as described in The Java Virtual Machine Specification, 2nd edition. More detailed information is to be found at the do_verify() method's documentation.

The system property org.apache.bcel.verifier.maxFrameSlots bounds the size of the pass 3b data flow analysis, measured in frame slots: (max_locals + max_stack) * instruction count of the method under verification. Methods above the bound are rejected instead of analyzed. The default is 100,000,000; a value of zero or less disables the bound.

See Also:

do_verify()

Constructor Summary

Constructors

Constructor	Description
Pass3bVerifier(Verifier myOwner, int methodNo)	This class should only be instantiated by a Verifier.

Method Summary

Modifier and Type	Method	Description
VerificationResult	do_verify()	Pass 3b implements the data flow analysis as described in the Java Virtual Machine Specification, Second Edition.
int	getMethodNo()	Returns the method number as supplied when instantiating.
void	invalidReturnTypeError(Type returnedType, MethodGen m)	Throws an exception indicating the returned type is not compatible with the return type of the given method.

Methods inherited from class org.apache.bcel.verifier.PassVerifier

addMessage, getMessages, getMessagesList, verify

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Pass3bVerifier

public Pass3bVerifier(Verifier myOwner,
                      int methodNo)

This class should only be instantiated by a Verifier.

Parameters:

myOwner - The verifier that owns this Pass3bVerifier.

methodNo - The method number.

See Also:

Verifier

Method Detail

do_verify

public VerificationResult do_verify()

Pass 3b implements the data flow analysis as described in the Java Virtual Machine Specification, Second Edition. Later versions will use LocalVariablesInfo objects to verify if the verifier-inferred types and the class file's debug information (LocalVariables attributes) match [TODO].

Specified by:

do_verify in class PassVerifier

Returns:

The VerificationResult.

See Also:

LocalVariablesInfo, Pass2Verifier.getLocalVariablesInfo(int)

getMethodNo

public int getMethodNo()

Returns the method number as supplied when instantiating.

Returns:

The method number.

invalidReturnTypeError

public void invalidReturnTypeError(Type returnedType,
                                   MethodGen m)

Throws an exception indicating the returned type is not compatible with the return type of the given method.

Parameters:

returnedType - The type of the returned expression.

m - The method we are processing.

Throws:

StructuralCodeConstraintException - Always thrown.

Since:

6.0