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From "Ivan Popov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-3698) [drlvm][jvmti] location of EXCEPTION event differs from location of top stack frame
Date Wed, 18 Apr 2007 14:05:15 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-3698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ivan Popov updated HARMONY-3698:
--------------------------------

    Attachment: jdwp_test.patch

Attached patch "jdwp_test.patch" adds additional test case to JDWP test

  org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest

to reproduce this problem.

To run this test apply patch to jdktools component, build Harmony JDK with federated build,
and run the test:

1. goto jdktools directory, add junit to classpath, and run particular test:
    cd working_jdktools
    export CLASSPATH=<...>/trunk/common_resources/depends/jars/junit_3.8.2/junit.jar
    ant test -Dbuild.module=jpda -Dtest.case=org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest

2. see results in <...>/trunk/working_jdktools/build/test_report/html/index.html

It is possible also to run test directly from command line:
   cd working_jdktools
   deploy/jdk/bin/java -classpath ../common_resources/depends/jars/junit_3.8.2/junit.jar:build/tests/classes
\
   org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest

Typical test output for for this problem is the following:

<...>
>> testExceptionEventLocation: Event is received! Check it ...
>> testExceptionEventLocation: parsedEvents.length = 1
>> testExceptionEventLocation: parsedEvents[0].getEventKind() = 4
>> testExceptionEventLocation: returnedThread = 1828
>> testExceptionEventLocation: returnedExceptionLoc = Location: tag=1, classID=1000000572,
methodID=142759272, index=65
>> testExceptionEventLocation: topFrameLoc = Location: tag=1, classID=1000000572, methodID=142759272,
index=66
<...>
1) testExceptionEventLocation(org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest)junit.framework.AssertionFailedError:
Different exception and top frame location index, expected:<65> but was:<66>
        at org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest.testExceptionEventLocation(ExceptionTest.java:164)
        at java.lang.reflect.VMReflection.invokeMethod(VMReflection.java)
        at org.apache.harmony.jpda.tests.jdwp.Events.ExceptionTest.main(ExceptionTest.java:46)


> [drlvm][jvmti] location of EXCEPTION event differs from location of top stack frame
> -----------------------------------------------------------------------------------
>
>                 Key: HARMONY-3698
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3698
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM, JDK
>         Environment: Linux/x86, Windows/x86, apache-harmony-jdk-r529895
>            Reporter: Ivan Popov
>         Attachments: jdwp_test.patch
>
>
> JVMTI callback for EXCEPTION event reports location for thrown exception different than
the location of top stack frame. This lead that Eclipse debugger shows wrong source line when
exception application is stopped on exception throw. In RI both locations are equal.
> Here is test class to reproduce this problem.
> public class TestClass {
> 	public static void main(String[] args) {
> 		try {
> 			throw new TestException("test");  // exception breakpoint line
> 		} catch (TestException e ){
> 			e.printStackTrace();
> 		}
> 	}
> 	static public class TestException extends RuntimeException {
> 		TestException(String msg) {
> 			super(msg);
> 		}
> 	}
> }
> To reproduce:
> 1. Load this class to Eclipse
> 2. Set exception breakpoint for TestException class (Run->AddJavaExceptionBreakpoint...)
> 3. Launch this class under debugger (Run->Debug)
> 4. Wait until application is suspended on exception throw
> Eclipse will highlight source line with catch clause instead of throw clause. This is
because Eclipse relies on the location of the top stack frame rather than on location of an
event. In RI both locations are equal, but in DRLVM locations are different.

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