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From "Dag H. Wanvik (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5514) SecureServerTest doesn't play nice ewith EMMA: AccessControlException
Date Thu, 24 Nov 2011 00:40:41 GMT
SecureServerTest doesn't play nice ewith EMMA: AccessControlException

                 Key: DERBY-5514
                 URL: https://issues.apache.org/jira/browse/DERBY-5514
             Project: Derby
          Issue Type: Bug
    Affects Versions:
            Reporter: Dag H. Wanvik

When running SecureServerTest with jars instrumented with EMMA using the ant emma-all target,
I see:

[junit] (net)derbynet.SecureServerTest.testServerStartup used 8475 ms junit.framework.TestListener:
    [junit] START-SPAWNED:SpawnedNetworkServer ERROR OUTPUT:
    [junit] java.security.policy: error adding Entry:
    [junit] 	java.net.MalformedURLException: no protocol: /export/home/dag/java/sb/sb1/tools/java/emma.jar
    [junit] java.security.AccessControlException: access denied (java.io.FilePermission coverage.ec
    [junit] 	at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
    [junit] 	at java.security.AccessController.checkPermission(AccessController.java:546)
    [junit] 	at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
    [junit] 	at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
    [junit] 	at java.io.File.exists(File.java:731)
    [junit] 	at com.vladium.emma.data.DataFactory.persist(DataFactory.java:525)
    [junit] 	at com.vladium.emma.data.DataFactory.persist(DataFactory.java:86)
    [junit] 	at com.vladium.emma.rt.RTCoverageDataPersister.dumpCoverageData(RTCoverageDataPersister.java:54)
    [junit] 	at com.vladium.emma.rt.RTExitHook.run(RTExitHook.java:32)
    [junit] 	at java.lang.Thread.run(Thread.java:662)
    [junit] Exception in thread "EMMA shutdown handler thread" java.lang.RuntimeException:
EMMA failed to dump coverage data: java.security.AccessControlException: access denied (java.io.FilePermission
coverage.ec read)
    [junit] 	at com.vladium.emma.rt.RTCoverageDataPersister.dumpCoverageData(RTCoverageDataPersister.java:71)
    [junit] 	at com.vladium.emma.rt.RTExitHook.run(RTExitHook.java:32)
    [junit] 	at java.lang.Thread.run(Thread.java:662)
    [junit] END-SPAWNED  :SpawnedNetworkServer ERROR OUTPUT:

This is presumably because the test spawns a server which runs with the default server policy.

Another thing is that is seems dangerous to let the spawned process write to EMMA's "coverage.ec",
since we don't know when the parent process will write to it. This behavior could be what's
been causing our corrutions in the EMMA runs earlier. The missing permissions just highlight
what's happening.

In this case the spawned process was started with this command line (I instrumented the code):

XXX server startup command = /usr/jdk/instances/jdk1.6.0/jre/bin/java -classpath /<my sandbox>/tools/java/emma.jar:/<my
sandbox>/jars/sane/derbyTesting.jar:/<my sandbox>/jars/emma/lib/derbyclient.jar:/<my
sandbox>/jars/emma/lib/derbynet.jar:/<my sandbox>/jars/emma/lib/derby.jar:/<my
sandbox>/jars/emma/lib/derbytools.jar:/<my sandbox>/jars/emma/lib/derbyrun.jar:/<my
org.apache.derby.drda.NetworkServerControl start -h localhost -p 1527 

Possible approaches:
         run inferior VMs with plain jars (downside: we won't get coverage for those)
         run with a special default policy file when we run with EMMA, detect when we fork

         with EMMA jars and use a dedicated "coverage.ec", either by telling EMMA to use another
one if possible,

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