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huettenhain / dhrake

The Delphi Hand Rake
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Failed to resolve data length for PascalString255 #10

Open kabiri opened 7 months ago

kabiri commented 7 months ago

Hello when i run it , show error

`Failed to resolve data length for PascalString255 ghidra.program.model.util.CodeUnitInsertionException: Failed to resolve data length for PascalString255 at ghidra.program.database.code.CodeManager.createCodeUnit(CodeManager.java:2018) at ghidra.program.database.ListingDB.createData(ListingDB.java:284) at ghidra.program.flatapi.FlatProgramAPI.createData(FlatProgramAPI.java:1717) at DhrakeParseClass.run(DhrakeParseClass.java:46) at ghidra.app.script.GhidraScript.executeNormal(GhidraScript.java:403) at ghidra.app.script.GhidraScript.doExecute(GhidraScript.java:258) at ghidra.app.script.GhidraScript.execute(GhidraScript.java:236) at ghidra.app.plugin.core.script.RunScriptTask.run(RunScriptTask.java:47) at ghidra.util.task.Task.monitoredRun(Task.java:134) at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:840)

Build Date: 2024-Apr-10 1518 EDT Ghidra Version: 11.0.3 Java Home: C:\Program Files\Eclipse Adoptium\jdk-17.0.9.9-hotspot JVM Version: Eclipse Adoptium 17.0.9 OS: Windows 10 10.0 amd64 Workstation: ZIGSOFTWARE `

huettenhain commented 7 months ago

For me to help you, you will need to provide exact steps to reproduce this, not just an error trace 😉. So, preferably, the sample you were analysing and what exactly you did at what offset in the code.

kabiri commented 6 months ago

I followed the steps in the description. I don't see any phrase starting with VMT_ anywhere in the code. I find and select code like this local_2c._0_4_ = 0x9bf45f; in the decompiled section and run the script.

sarog commented 6 months ago

Hi @kabiri, you can find VMT_ labels using the Symbol Tree window in Ghidra. Take a look here for more information on how to use Dhrake (and read through the entire thread too for more tips!). If you aren't seeing any VMT_ labels, then something went wrong with the IDC generation or a step was omitted.