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Mark Roberts commented on BCEL-303: ----------------------------------- Fixed with https://github.com/apache/commons-bcel/pull/117 > AssertionViolatedException in Pass 3A Verification of invoke instructions > ------------------------------------------------------------------------- > > Key: BCEL-303 > URL: https://issues.apache.org/jira/browse/BCEL-303 > Project: Commons BCEL > Issue Type: Bug > Components: Verifier > Affects Versions: 6.2 > Reporter: Rohan Padhye > Priority: Major > Attachments: A.class > > > The verifier throws an assertion violation / INTERNAL ERROR in pass 3A when > verifying a malformed class file. > As I understand it, the issue is that if class A implements interface B, then > class A can be pass stage 1 verification even if class B is not resolved. > However, pass 3A verification of code that invokes a method defined on class > A assumes that the receiver type and all its interfaces are fully resolved. > h1. Steps to reproduce: > > Save the attached file as "example/A.class" and run: > java -cp <classpath> org.apache.bcel.verifier.Verifier example.A > > The file A.class was generated automatically by the fuzzer JQF > (https://github.com/rohanpadhye/jqf). > h2. Expected output: > VERIFIED_REJECTED > h2. Observed output: > JustIce by Enver Haase, (C) 2001-2002. > <http://bcel.sourceforge.net> > <http://commons.apache.org/bcel> > > Now verifying: example.A > > Pass 1: > VERIFIED_OK > Passed verification. > > Pass 2: > VERIFIED_OK > Passed verification. > > Exception in thread "main" > org.apache.bcel.verifier.exc.AssertionViolatedException: INTERNAL ERROR: > Missing class: java.lang.ClassNotFoundException: Exception while looking for > class example.I0: java.io.IOException: Couldn't find: example/I0.class > at > org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.visitINVOKEVIRTUAL(Pass3aVerifier.java:1315) > at org.apache.bcel.generic.INVOKEVIRTUAL.accept(INVOKEVIRTUAL.java:89) > at > org.apache.bcel.generic.InstructionHandle.accept(InstructionHandle.java:302) > at > org.apache.bcel.verifier.statics.Pass3aVerifier.pass3StaticInstructionOperandsChecks(Pass3aVerifier.java:443) > at > org.apache.bcel.verifier.statics.Pass3aVerifier.do_verify(Pass3aVerifier.java:208) > at org.apache.bcel.verifier.PassVerifier.verify(PassVerifier.java:71) > at org.apache.bcel.verifier.Verifier.doPass3a(Verifier.java:89) > at org.apache.bcel.verifier.Verifier.main(Verifier.java:216) > Caused by: java.lang.ClassNotFoundException: Exception while looking for > class example.I0: java.io.IOException: Couldn't find: example/I0.class > at > org.apache.bcel.util.MemorySensitiveClassPathRepository.loadClass(MemorySensitiveClassPathRepository.java:97) > at org.apache.bcel.classfile.JavaClass.getInterfaces(JavaClass.java:847) > at > org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.getMethodRecursive(Pass3aVerifier.java:1181) > at > org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.visitINVOKEVIRTUAL(Pass3aVerifier.java:1304) > ... 7 more > Caused by: java.io.IOException: Couldn't find: example/I0.class > at org.apache.bcel.util.ClassPath.getClassFile(ClassPath.java:279) > at org.apache.bcel.util.ClassPath.getInputStream(ClassPath.java:209) > at org.apache.bcel.util.ClassPath.getInputStream(ClassPath.java:188) > at > org.apache.bcel.util.MemorySensitiveClassPathRepository.loadClass(MemorySensitiveClassPathRepository.java:95) > ... 10 more > > -- This message was sent by Atlassian Jira (v8.20.1#820001)