Not able to start application using obfuscated jar

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1

Hi Jack,

I ran into an issue of not able to initialize main class with the following error:
Error: Unable to initialize main class com.cepheid.testsupporttool.core.TSTApplication
Caused by: java.lang.VerifyError: Expecting a stackmap frame at branch target 32
Exception Details:
Location:
com/cepheid/testsupporttool/core/TSTApplication.main([Ljava/lang/String;)V @2: getstatic
Reason:
Expected stackmap frame at this location.
…

I have the following obfuscation rules applied:
dontskipnonpubliclibraryclassmembers
dontshrink
dontoptimize
dontpreverify
dontnote
dontwarn

// Keep - Native method names. Keep all native class/method names.
keepclasseswithmembernames includedescriptorclasses: true, 'class * { \
    native <methods>; \
}'

// Keep - main class entry
keep 'public class com.mycorp.testsupporttool.core.TSTApplication {  \
    public static void main(java.lang.String[]);  \
}'

In my case, the main class is in a jar with internal libs obfuscated and external jars not obfuscated.

Did I miss any necessary configurations?

Thanks in advance,
Jingkun

2

Let me remove the config of dontpreverify and try launching the app again

3

Hi Jack,

Different error(s) are running into after removing dontpreverify rule:

12:33:22.343 [main] ERROR com.mycorp.startup - unable to start ConfigService
java.lang.NullPointerException: Cannot invoke “com.mycorp.c.i.b.s.a(com.mycorp.c.i.b.e)” because “” is null
at com.mycorp.c.h.e.i(Unknown Source) ~[nexus-3.3.11-RELEASE.jar:11]
at com.mycorp.c.h.e.b(Unknown Source) [nexus-3.3.11-RELEASE.jar:11]
at com.mycorp.c.h.t.b(Unknown Source) [nexus-3.3.11-RELEASE.jar:11]
at com.mycorp.gxcore.e.b.A.b(Unknown Source) [gxcore-3.3.13-RELEASE.jar:3.3.13-RELEASE]
at com.mycorp.myApp.core.TSTApplication.main(Unknown Source) [myApp.jar:?]

What might be the issue?

Thanks,
Jingkun

4

Hi @jhuOnProguard.

Can you try the following steps and let me know if the ‘java.lang.VerifyError’ goes away?

  1. Ensure that your ProGuard configuration includes the -dontpreverify option, as you’ve already done.

  2. Use a more refined -keep option:

-keep class com.cepheid.testsupporttool.core.TSTApplication {
    public static void main(java.lang.String[]);
}
  1. Check your JDK version
  • Ensure you’re using JDK 8 or later.

  1. Upgrade to the latest version of ProGuard.

  2. Clean and rebuild.

Please let me know if anything is unclear.

Kind Regards,

Jack

5

Hi Jack,

Yes. It worked. I apologize for my late reply.

Thanks a lot for your help.