Konloch / Konloch/bytecode-viewer

java.lang.ArrayIndexOutOfBoundsException

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Dominant language
Java
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Description

Hello,

I encountered the following error while decompiling a class using bytecode-viewer. Since the class file is not convenient to publicly share, I have emailed it to you. I hope to receive your reply. Thank you.

java.lang.ArrayIndexOutOfBoundsException: Index 65350 out of bounds for length 113
	at org.objectweb.asm.ClassReader.readCode(ClassReader.java:2441)
	at org.objectweb.asm.ClassReader.readMethod(ClassReader.java:1515)
	at org.objectweb.asm.ClassReader.accept(ClassReader.java:745)
	at org.objectweb.asm.ClassReader.accept(ClassReader.java:425)
	at the.bytecode.club.bytecodeviewer.api.ASMUtil.bytesToNode(ASMUtil.java:42)
	at the.bytecode.club.bytecodeviewer.util.JarUtils.getNode(JarUtils.java:242)
	at the.bytecode.club.bytecodeviewer.resources.importing.impl.ClassResourceImporter.open(ClassResourceImporter.java:47)
	at the.bytecode.club.bytecodeviewer.resources.importing.ImportResource.importKnownFile(ImportResource.java:87)
	at the.bytecode.club.bytecodeviewer.resources.importing.ImportResource.run(ImportResource.java:59)
	at java.base/java.lang.Thread.run(Thread.java:833)

image

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the failure with the emailed class file, then inspect ASMUtil.bytesToNode and the org.objectweb.asm.ClassReader.readCode stack-trace path. Compare the failing input with the import flow through JarUtils.getNode and ClassResourceImporter.open; done means the class can be opened without this exception.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
reverse-engineering
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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