VM.getSavedProperty("os.name") not supported

[cyrille-artho]

Some properties have to be set at the time when the VM is initialized; this is not the case for os.name. If a class later calls VM.getSavedProperty("os.name"), the result is an IllegalArgumentException because the property has not been set.

[cyrille-artho]

Example to reproduce problem:

public class Test {
  public static void main(String[] args) {
    System.out.println(jdk.internal.misc.VM.getSavedProperty("os.name"));
  }
}

Run with bin/jpf +classpath=. Test.

[Harsh4902]

Properties props = new Properties();
props.setProperty("os.name","Linux");
VM.saveAndRemoveProperties(props);

I have added these lines to ensure that savedProps variable of jdk.internal.misc.VM class is initialized, and I got the results.

JavaPathfinder core system v8.0 (rev a16b929e0aae442552277e0be3ae86e2666b0b10) - (C) 2005-2014 United States Government. All rights reserved.


====================================================== system under test
Test.main()

====================================================== search started: 9/12/24, 5:28 AM
[WARNING] orphan NativePeer method: jdk.internal.misc.Unsafe.getUnsafe()Lsun/misc/Unsafe;
Linux

====================================================== results
no errors detected

====================================================== statistics
elapsed time:       00:00:00
states:             new=1,visited=0,backtracked=1,end=1
search:             maxDepth=1,constraints=0
choice generators:  thread=1 (signal=0,lock=1,sharedRef=0,threadApi=0,reschedule=0), data=0
heap:               new=617,released=35,maxLive=0,gcCycles=1
instructions:       11482
max memory:         62MB
loaded code:        classes=108,methods=2221

[cyrille-artho]

Great! Please see where in the VM initialization you can add such code (using the union of the existing properties and the new "os.name" property).

[cyrille-artho]

We want to use the results of the host JVM's System.getProperty to set the same value on the properties map of the JPF VM.

[cyrille-artho]

There is a mechanism for this in the native peer of System, in src/peers/gov/nasa/jpf/vm/JPF_java_lang_System.java, getSelectedSysPropsFromHost. This is the default behavior, but "os.name" is currently missing there; try adding it there, perhaps this will resolve this issue.

[cyrille-artho]

There is a type mismatch in the multi process VM, maybe somewhere in initialize.
Try finding out where there is a difference w.r.t. system properties between src/main/gov/nasa/jpf/vm/SingleProcessVM.java and src/main/gov/nasa/jpf/vm/MultiProcessVM.java.