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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3081) cannot create instance of generated class because of java.lang.VerifyError in 4 tests on IBM iseries
Date Mon, 24 Sep 2007 22:35:50 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kathey Marsden updated DERBY-3081:

    Attachment: DERBY-3081_try1_stat.txt

Attached is an initial attempt to fix this issue. I would most appreciate review from someone
familiar with byte code generation as it is a weak area for me.  The patch changes 
-                       mb.upCast(leftInterfaceType);
+                       mb.cast(leftInterfaceType);

to properly cast the argument to StringDataValue.   Essentially what we were ending up with
in the generated code was this:

  public Object e2()
        throws StandardException, Exception
        ConcatableDataValue concatabledatavalue = ((StringDataValue)getColumnFromRow(2, 2)).substring(getDataValueFactory().getDataValue(1,
null), getDataValueFactory().getDataValue(1, null), e3, 16);
        e3 = concatabledatavalue;
        StringDataValue stringdatavalue = ((StringDataValue)getColumnFromRow(2, 2)).ansiTrim(2,
concatabledatavalue, e2);

So we were passing a ConcatableDataValue instead of a StringDataValue to ansiTrim.  Changing
from upCast to cast forces the cast so that ansiTrim gets called, but I am not sure I entirely
understand the implications of the change.  Please take a look at this one line change and
let me know what you think.

So far I only verified that the reproducible case passes on iseries and windows and that AnsiTrimTest
 passes on Windows.  I'll run the full set of tests on iseries after I confirm I am on the
right track here.



> cannot create instance of generated class because of java.lang.VerifyError in 4 tests
on IBM iseries
> ----------------------------------------------------------------------------------------------------
>                 Key: DERBY-3081
>                 URL: https://issues.apache.org/jira/browse/DERBY-3081
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions:
>         Environment: IBM iseries, OS: V5R4M0; both with ibm 142 (build 1.4.2_08-b02)
and 15 jvm (build 1.5.0_03-b07)
>            Reporter: Myrna van Lunteren
>            Assignee: Kathey Marsden
>         Attachments: ac601a400fx0115x38bex8045x0000004554b80.class, DERBY-3081_try1_diff.txt,
DERBY-3081_try1_stat.txt, javap.out
> 4 tests fail to instantiate a generated class:
> 	1) testTrimCharIsExpr(org.apache.derbyTesting.functionTests.tests.lang.AnsiTrimTest)java.sql.SQLException:
Cannot create an instance of generated class org.apache.derby.exe.ac848c0061x0114xfee3x0ec7x0000636c39840.
> 	2) testEnglishCollation(org.apache.derbyTesting.functionTests.tests.lang.CollationTest)java.sql.SQLException:
Cannot create an instance of generated class org.apache.derby.exe.aca31ba168x0114xfee3x0ec7x0000636c39842a.
> 	3) testNorwayCollation(org.apache.derbyTesting.functionTests.tests.lang.CollationTest)java.sql.SQLException:
Cannot create an instance of generated class org.apache.derby.exe.ac066fa8c8x0114xfee3x0ec7x0000636c39842a.
> 	4) testPolishCollation(org.apache.derbyTesting.functionTests.tests.lang.CollationTest)java.sql.SQLException:
Nie mo?na utworzy? instancji wygenerowanej klasy org.apache.derby.exe.ac86a73025x0114xfee3x0ec7x0000636c39842a.
> All these something like this:
>     ------------------------
>     Caused by: java.lang.VerifyError: org/apache/derby/exe/ac86a73025x0114xfee3x0ec7x0000636c39842a
0000 0000 
> 	at java.lang.Throwable.<init>(Throwable.java:195)
> 	at java.lang.Error.<init>(Error.java:49)
> 	at java.lang.VerifyError.<init>(VerifyError.java:34)
> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
> 	at org.apache.derby.iapi.services.loader.ClassInfo.getNewInstance(Unknown Source)
> 	at org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown Source)
> 	at org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(Unknown
> 	at org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown Source)

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