UnsatisfiedLinkError: cannot find native StackStreamFactory.checkStackWalkModes

[gayanW]

Runtime error "java.lang.UnsatisfiedLinkError: cannot find native java.lang.StackStreamFactory.checkStackWalkModes" when running StackWalkerTest.

[junit] java.lang.UnsatisfiedLinkError: cannot find native java.lang.StackStreamFactory.checkStackWalkModes
[junit]     at java.lang.StackStreamFactory.checkStackWalkModes(no peer)
[junit]     at java.lang.StackStreamFactory.init(StackStreamFactory.java:962)
[junit]     at java.lang.StackStreamFactory.<clinit>(StackStreamFactory.java:66)
[junit]     at java.lang.StackWalker.walk(StackWalker.java:497)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest$MyClass.foo(StackWalkerTest.java:41)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest$MyClass.bar(StackWalkerTest.java:31)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest.callIt(StackWalkerTest.java:62)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest.testCallerClass(StackWalkerTest.java:68)
[junit]     at java.lang.reflect.Method.invoke(gov.nasa.jpf.vm.JPF_java_lang_reflect_Method)
[junit]     at gov.nasa.jpf.util.test.TestJPF.runTestMethod(TestJPF.java:648)

[cyrille-artho]

This seems to be a tough one to resolve.
You can write a simple native peer that returns true to resolve this particular warning, but there are other native methods in StackWalker, which are impossible to replace.
Unless we can get by with just a stub for checkStackWalkModes, we would have to do the following:

1. Revert 0b347c4bd2822b17b5b8bdf639aafe51141e4e31 to get (hopefully) a passing test, which will work for Java 10 but probably no longer for Java 11.
2. Write a model class for StackWalker from scratch. Our implementation does not have to be as optimized as the Java library version, but this will still take some time.

[gayanW]

Thank you for the suggestions. I don't see any other errors associated with StackStreamFactory in the current build logs. Please see the PR which implement just a native peer that returns true.

[cyrille-artho]

OK, let's close this issue for now and re-open it if there is a need for a fresh implementation of StackWalker. This might become necessary if its internal native methods do not work in jpf-core.

[gayanW]

Now I could see more UnsatisfiedLinkErrors related to native methods in StackStreamFactory, like:

[junit] java.lang.UnsatisfiedLinkError: cannot find native java.lang.StackStreamFactory$AbstractStackWalker.callStackWalk
[junit]     at java.lang.StackStreamFactory$AbstractStackWalker.callStackWalk(no peer)
[junit]     at java.lang.StackStreamFactory$AbstractStackWalker.beginStackWalk(StackStreamFactory.java:370)
[junit]     at java.lang.StackStreamFactory$AbstractStackWalker.walk(StackStreamFactory.java:243)
[junit]     at java.lang.StackWalker.walk(StackWalker.java:498)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest$MyClass.foo(StackWalkerTest.java:41)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest$MyClass.bar(StackWalkerTest.java:31)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest.callIt(StackWalkerTest.java:62)
[junit]     at gov.nasa.jpf.test.java.lang.StackWalkerTest.testCallerClass(StackWalkerTest.java:68)
[junit]     at java.lang.reflect.Method.invoke(gov.nasa.jpf.vm.JPF_java_lang_reflect_Method)
[junit]     at gov.nasa.jpf.util.test.TestJPF.runTestMethod(TestJPF.java:648)

Maybe we could just revert #83, then refactor old ReflectionTest to use jdk.internal.reflect.Reflection instead of sun.reflect.Reflection. You may reopen the issue.

[cyrille-artho]

Still pending, even after PR #210.

[quadhier]

Hi @cyrille-artho and @pparizek, StackWalker API has been implemented in #360. Maybe we could close this issue?