Name: elR10090 Date: 02/28/2001




The methods StackFrame.getValue() and StackFrame.setValue()
return incorrect values
when they are applied to a double type variable of a method.

These incorrect returned results are observed
for JDI versions 1.3.1-rc1-b17 and 1.4.0-beta-b52
when HS 1.3.1-rc1-b17, or HS 1.4.0-beta-b52, is runnning a test program
on the following H/S configurations:

   Intel: dual Pentium-III 600MHz processors, RAM 512Mb;
   OS: Solaris-8;
   JVM: Client & Server


Since access to instance fields of methods is possible
if debuggee method's thread has been suspended by an event,
a special test program implementing such suspension is used
to test values returned by the methods.

Below, there are corresponding code fragments
in the debugger and debuggee,
and corresponding log for the tested double value

        double db2 = 1111111111.0d
    
The log shows as follows.

Step1:
Action: The tested value db2 is read from the debuggee
        into the debugger first time,
        into the LocalVariable dbv2.
Result: The value in the debugger is:

         dbv2 = 6.79772587986E-313 137587503545
                ^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^
                decimal Double.doubleToRawLongBits()

Step2:
Action: The value read in the step1, is written back into the debugger,
        into the method variable db1.
Result: The value in the debuggee is:

         db1 = 1.3162180141825046E-33 4114977479293140992
                ^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^
                decimal Double.doubleToRawLongBits()

Step3:
Action: The above value db1 is read from the debuggee
        into the debugger second time,
        into the LocalVariable dbv1.
Result: The value in the debugger is:

        dbv1 = 6.8763980604E-313 139179846206
               ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^
               decimal Double.doubleToRawLongBits()

In all steps, source and result values don't match each other.



Steps to reproduce the bug:
1. cd /net/sqesvr.eng/export/vsn/GammaBase/Bugs/{this bug ID}
2. ksh doit.sh {JAVA_HOME}



The test will be in the next release of testbase_nsk
which is accessable through:

    /net/sqesvr.eng/export/vsn/VM/testbase/testbase_nsk


    This bug affects the following testbase_nsk test:
    
    nsk/jdi/StackFrame/getValue/getvalue001
    nsk/jdi/StackFrame/setValue/setvalue001


-----------
// the testing code in the debugger:

case 3: DoubleValue dbv1 = null;
        DoubleValue dbv2 = null;
      
        locvar1 = stackFrame.visibleVariableByName(db1);
        locvar2 = stackFrame.visibleVariableByName(db2);
        if (locvar1 == null || locvar2 == null) {
            log3("ERROR: 'locvar1 == null || locvar2 == null' for Double");
            expresult = 1;
            break;
        }
    
        dbv2 = (DoubleValue) stackFrame.getValue(locvar2);
        double db2Value = dbv2.value();
        log2("1 : dbv2 = " + db2Value + " " +
                     Double.doubleToRawLongBits(db2Value) );
        if (db2Value != 1111111111.0d) {
            log3("ERROR: dbv2 != 1111111111.0d : " + db2Value );
            expresult = 1;
        }
        stackFrame.setValue(locvar1, dbv2);
        dbv1 = (DoubleValue) stackFrame.getValue(locvar1);
        double db1Value = dbv1.value();
        log2("2 : dbv1 = " + db1Value + " " +
                     Double.doubleToRawLongBits(db1Value) );
        if (db1Value != 1111111111.0d) {
            log3("ERROR: dbv1 != 1111111111.0d : " + db1Value );
            expresult = 1;
        }

        break;


---------------
//the method runt() with the tested code in the debuggee:
   
    public void runt() {
        
        boolean bl1 = true, bl2 = false;
        byte bt1 = 0, bt2 = 1;
        char ch1 = 0, ch2 = 1;
        double db1 = 0.0d, db2 = 1111111111.0d;
        float fl1 = 0.0f, fl2 = 1111111111.0f;
        int in1 = 0, in2 = 1;
        long ln1 = 0, ln2 = 0x1234567890abcdefL;
        short sh1 = 0, sh2 = 1;
            
        setvalue001a.log1("1 : db2 = " + db2 + " " +
                                  Double.doubleToRawLongBits(db2) );
        setvalue001a.log1("method 'runt' enter");
        setvalue001a.log1("method 'runt' body");
        setvalue001a.log1("2 : db1 = " + db1 + " " +
                                  Double.doubleToRawLongBits(db1) );
        setvalue001a.log1("method 'runt' exit");
        
        return;
    }
---------------
// log:

==> nsk/jdi/StackFrame/setValue/setvalue001 TESTING BEGINS
**> setvalue001a: waiting for an instruction from the debugger ...
**> setvalue001a: method 'run' enter
--> setvalue001: new check: #0
**> setvalue001a: synchronized block enter
**> setvalue001a: synchronized block exit
**> setvalue001a: waiting for an instruction from the debugger ...
**> setvalue001a: 1 : db2 = 1.111111111E9 4742447145771073536
                         ^^^^^^^^^^^^^^^^^^^
                         initial value

**> setvalue001a: method 'runt' enter
--> setvalue001: 1 : dbv2 = 6.79772587986E-313 137587503545
                        ^^^^^^^^^^^^^^^^^^^^^^^^^
           Step1: value read into the debugger first time

##> setvalue001: ERROR: dbv2 != 1111111111.0d : 6.79772587986E-313
--> setvalue001: 2 : dbv1 = 6.8763980604E-313 139179846206
                        ^^^^^^^^^^^^^^^^^^^^^^^^
           Step3: value read into the debugger second time
                        
##> setvalue001: ERROR: dbv1 != 1111111111.0d : 6.8763980604E-313
**> setvalue001a: method 'runt' body
**> setvalue001a: 2 : db1 = 1.3162180141825046E-33 4114977479293140992
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
           Step2: value written back into the debuggee
                         
**> setvalue001a: method 'runt' exit
**> setvalue001a: method 'run' exit
##> setvalue001: ERROR: expresult != true; check # = 0
--> setvalue001: new check: #1
--> setvalue001: test cases finished
--> setvalue001: : returned string is 'checkend'
==> nsk/jdi/StackFrame/setValue/setvalue001 TESTING ENDS


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Name: elR10090 Date: 04/23/2001



Alexey Gibadullin, ###@###.###

This bug also affects the following tests from testbase_nsk:

    nsk/jdi/ArrayReference/getValue/getvalue001
    nsk/jdi/ArrayReference/getValues_ii/getvaluesii001
    nsk/jdi/ArrayReference/getValues_ii/getvaluesii002
    nsk/jdi/ArrayReference/getValues/getvalues001
    nsk/jdi/ArrayReference/setValue/setvalue001
    nsk/jdi/ArrayReference/setValues_ilii/setvaluesilii001
    nsk/jdi/ArrayReference/setValues_l/setvaluesl001
    nsk/jdi/ArrayReference/setValues_l/setvaluesl002
    
The tests will appear in the next release r04 of testbase_nsk testbase located
at:

    /net/sqesvr.eng/export/vsn/VM/testbase/testbase_nsk.v14


======================================================================