java_g: Segmentation violation

Name: szC45993 Date: 12/13/99



 /net/sqesvr/vsn/testbase/testbase_nsk/src/nsk/arguments/args00125 test,
which uses developing options, crashes java_g (java version "1.2.2"
Java HotSpot(TM) Server VM (2.0rc1, mixed mode, debug build I))
on WinNT (Pentium II, 350MHz, 128Mb RAM, Windows NT 4.0 Workstation).
See log and sources below.

TONGA'S LOG:
============
[#] cd d:/zss/TONGA_WSs/ZSS_workdir/Administrator.NT.x86/args00125
[#] f:/ld24/java/hotspot/jdk1.2.2/win32/bin/java_g -XX":"Flags=f:/ld24/java/zss/TONGA_WSs/testbase_js/src/nsk/arguments/args00125/gammarc.gammarc -verify args00125
VM option '+PrintSymbolTableSizeHistogram'
VM option '+PrintScopeTree'
VM option '+DebugVtables'
VM option '+PrintVtables'
VM option '+PrintVtableStats'
VM option '+TraceCreateZombies'
Initializing: java/lang/Object
Initializing: java/lang/Number
Initializing: java/lang/Long
Initializing: java/lang/Integer
Initializing: java/lang/Short
Initializing: java/lang/Byte
Initializing: java/lang/Double
Initializing: java/lang/Float
Initializing: java/lang/Character
Initializing: java/lang/Boolean

...

Initializing: java/io/FilePermission$1
Initializing: java/lang/RuntimePermission
Initializing: args00125
Initializing: java/lang/Long
0: 1356128
Initializing: MemoryObject
1: 1336200
2: 1316592
3: 1296984
4: 1277376
Test passed.

 static void args00125.main(jobject) [1] + Done(139) f:/ld24/java/hotspot/jdk1.2.2/win32/bin/java_g -XX":"Flags=f:/ld24/java/zss/TONGA_WSs/testbase_js/src/nsk/arguments/args00125/gammarc.gammarc -verify args00125
  997 Segmentation violation f:/ld24/java/hotspot/jdk1.2.2/win32/bin/java_g
[#] echo $?
139
[#]

SOURCES:
========

//--------------------- args00125.java:
//args00125.java
/* This test simply creates a series of circularly
 * linked memeory objects which should be able to be
 * GC'd
 */


class MemoryObject
{
    byte array[];
    MemoryObject next;
    MemoryObject previous;

    public MemoryObject(int size)
    {
        array = new byte[size];
    }
}

class args00125
{
    static final int ARRAY_SIZE = 100;
    static final int OBJECT_SIZE = 10;
    static final int LOOP_COUNT = 5;
    static final int CIRCULARITY_SIZE = 3;

    static MemoryObject memoryArray[] = new MemoryObject[ARRAY_SIZE];

    public static void main(String args[])
    {
        for (int j = 0; j < LOOP_COUNT; j++)
        {
            System.out.println(j + ": " + Runtime.getRuntime().freeMemory());
            for (int i = 0; i < ARRAY_SIZE; i ++)
            {
                memoryArray[i] = new MemoryObject(OBJECT_SIZE);
                makeCircular(memoryArray[i], CIRCULARITY_SIZE);
            }
        }

        // if there's any memory left, let's assume it's okay
        System.out.println("Test passed.");

    }

    public static void makeCircular(MemoryObject mObj, int depth)
    {
MemoryObject tmpObj = mObj;

        for (int i = 0; i < depth; i++)
        {
            tmpObj.next = new MemoryObject(OBJECT_SIZE);
            tmpObj= tmpObj.next;
        }
tmpObj.next = mObj;
    }

    public static void confirmCircular(MemoryObject mObj)
    {
int count = 0;
MemoryObject mObj2 = mObj;
while (mObj2.next != mObj)
{
count++;
mObj2 = mObj2.next;
}
System.out.println("Circularity level: " + count);
    }
}
//---------------------



#--------------------- gammarc.gammarc:
+PrintSymbolTableSizeHistogram
+PrintScopeTree
+DebugVtables
+PrintVtables
+PrintVtableStats
+TraceCreateZombies
#---------------------


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