[Soot-list] java.lang.VerifyError

[左小强]

Hi Eric,Exception information is as follows:
Exception in thread "main" java.lang.VerifyError: (class: test, method: main signature: ([Ljava/lang/String;)V) Expecting to find object/array on stack        at java.lang.Class.getDeclaredMethods0(Native Method)        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)        at java.lang.Class.getMethod0(Unknown Source)        at java.lang.Class.getMethod(Unknown Source)        at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)


--- 12年9月6日，周四, Eric Bodden <eric.bodden at ec-spride.de> 写道：

发件人: Eric Bodden <eric.bodden at ec-spride.de>
主题: Re: [Soot-list] java.lang.VerifyError
收件人: "左小强" <xiaoqiang861025 at yahoo.cn>
抄送: "Richard Xiao" <richardxx at cse.ust.hk>, "soot" <soot-list at sable.mcgill.ca>
日期: 2012年9月6日,周四,下午10:38

Hello.
Do you just get "VerifyError" or does the VM print some additional information? Usually you get some additional info that can help debug the problem (or not).
Eric




On 6 September 2012 09:31, 左小强 <xiaoqiang861025 at yahoo.cn> wrote:



Hi Richard,
Thanks for your reply. But I can't understand what you mean. Can you explain your point further?



Actually I think the problem is that here I use java.lang.Object as the parameter type. I doubt whether it's not compitable with the Jimple Value type.
anyway, thank you.




Zhiqiang

--- 12年9月5日，周三, Richard Xiao <richardxx at cse.ust.hk> 写道：




发件人: Richard Xiao <richardxx at cse.ust.hk>
主题: Re: [Soot-list] java.lang.VerifyError
收件人: "左小强" <xiaoqiang861025 at yahoo.cn>



抄送: "soot" <soot-list at sable.mcgill.ca>
日期:
 2012年9月5日,周三,下午2:13

Your insertion violates some Java specifications. For example, in a constructor function, the call the super constructor must be the first statement. However, you place your instrumentation at the first position, hence it invalidates the verifier.





best,richardxx

On Wed, Sep 5, 2012 at 1:11 PM, 左小强 <xiaoqiang861025 at yahoo.cn> wrote:




Hi all,




I tried to obtain the runtime value of the operand in ConditionExpr (IfStmt). Therefore I use Soot to instrument the class file.




I intend to insert the following function into the class file:




   public static void appendConExpr(java.lang.Object op1)

using the following statements:
   InvokeExpr conditionExpr = Jimple.v().newStaticInvokeExpr(



			traceAppendConExpr.makeRef(),                         ((BinopExpr) ((IfStmt) stmt).getCondition()).getOp1());



  Stmt conditionStmt = Jimple.v().newInvokeStmt(conditionExpr);  units.insertBefore(conditionStmt,
 stmt);
The instrumentation phase is OK, however when i run the instrumented program, the Exception "java.lang.VerifyError" is thrown.




Can anyone tell me the reason and how to fix it? Thanks in advance!





Zhiqiang   


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-- 
Richard Xiao Xiao
PhD Student @ CSE @ Hong Kong University of Science and Technology
www.cse.ust.hk/~richardxx






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