Two problems:
Version:

java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
Java HotSpot(TM) 64-Bit Server VM (build 1.4.2-b28, mixed mode)

1. java -Xrunhprof -version
   intermittently shows the message "HPROF ERROR: heap dump size < 0"

2. run SPECjbb2000 with th following options
   CLASSPATH=./jbb.jar:./jbb_no_precompile.jar:./check.jar:./reporter.jar /opt/jdk1.4.2/bin/java -Xmn3
000m -Xms3600m -Xmx3600m -Xrunhprof:file=k.hprof spec.jbb.JBBmain -propfile SPECjbb.props

   and after some time, when it says "Loading Warehouse 1", press CTRL-C in order to obtain
   the Java Heap Dump, jvm crashes with the following diagnostic:
^CDumping Java heap ...

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0xFF33060C
Function=memcpy+0x1C
Library=/usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1

Current Java thread:
        at java.lang.Shutdown.halt(Native Method)
        at java.lang.Shutdown.exit(Shutdown.java:211)
        - locked <0xf563e3b8> (a java.lang.Class)
        at java.lang.Terminator$1.handle(Terminator.java:35)
        at sun.misc.Signal$1.run(Signal.java:195)
        at java.lang.Thread.run(Thread.java:534)
Dynamic libraries:
0x10000 /opt/jdk1.4.2/bin/java
0xff350000 /usr/lib/libthread.so.1
0xff390000 /usr/lib/libdl.so.1
0xff200000 /usr/lib/libc.so.1
0xff330000 /usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1
0xfe000000 /export/home1/jdk1.4.2/jre/lib/sparc/client/libjvm.so
0xff2e0000 /usr/lib/libCrun.so.1
0xff1e0000 /usr/lib/libsocket.so.1
0xff100000 /usr/lib/libnsl.so.1
0xff0d0000 /usr/lib/libm.so.1
0xff1c0000 /usr/lib/libsched.so.1
0xff310000 /usr/lib/libw.so.1
0xff0a0000 /usr/lib/libmp.so.2
0xff050000 /export/home1/jdk1.4.2/jre/lib/sparc/native_threads/libhpi.so
0xfe7d0000 /export/home1/jdk1.4.2/jre/lib/sparc/libverify.so
0xfe790000 /export/home1/jdk1.4.2/jre/lib/sparc/libjava.so
0xff020000 /export/home1/jdk1.4.2/jre/lib/sparc/libzip.so
0xfe610000 /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.2
0xfe550000 /export/home1/jdk1.4.2/jre/lib/sparc/libhprof.so

Heap at VM Abort:
Heap
 def new generation total 2981696K, used 2981696K [0x14400000, 0xcfc00000, 0xcfc00000)
  eden space 2891392K, 100% used [0x14400000, 0xc4ba0000, 0xc4ba0000)
  from space 90304K, 100% used [0xc4ba0000, 0xca3d0000, 0xca3d0000)
  to space 90304K, 0% used [0xca3d0000, 0xca3d0000, 0xcfc00000)
 tenured generation total 614400K, used 1862K [0xcfc00000, 0xf5400000, 0xf5400000)
   the space 614400K, 0% used [0xcfc00000, 0xcfdd1a90, 0xcfdd1c00, 0xf5400000)
 compacting perm gen total 4096K, used 2298K [0xf5400000, 0xf5800000, 0xf9400000)
   the space 4096K, 56% used [0xf5400000, 0xf563eab8, 0xf563ec00, 0xf5800000)
Local Time = Tue Feb 28 05:10:07 2006
Elapsed Time = 44
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2-b28 mixed mode)
#
# An error report file has been saved as hs_err_pid1825.log.
# Please refer to the file for further information.
#
Abort

Finally, the hs_err*.log file reads:

<snip>

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0xFF33060C
Function=memcpy+0x1C
Library=/usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1

Current Java thread:
        at java.lang.Shutdown.halt(Native Method)
        at java.lang.Shutdown.exit(Shutdown.java:211)
        - locked <0xf563e3b8> (a java.lang.Class)
        at java.lang.Terminator$1.handle(Terminator.java:35)
        at sun.misc.Signal$1.run(Signal.java:195)
        at java.lang.Thread.run(Thread.java:534)

Dynamic libraries:
0x10000 /opt/jdk1.4.2/bin/java
0xff350000 /usr/lib/libthread.so.1
0xff390000 /usr/lib/libdl.so.1
0xff200000 /usr/lib/libc.so.1
0xff330000 /usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1
0xfe000000 /export/home1/jdk1.4.2/jre/lib/sparc/client/libjvm.so
0xff2e0000 /usr/lib/libCrun.so.1
0xff1e0000 /usr/lib/libsocket.so.1
0xff100000 /usr/lib/libnsl.so.1
0xff0d0000 /usr/lib/libm.so.1
0xff1c0000 /usr/lib/libsched.so.1
0xff310000 /usr/lib/libw.so.1
0xff0a0000 /usr/lib/libmp.so.2
0xff050000 /export/home1/jdk1.4.2/jre/lib/sparc/native_threads/libhpi.so
0xfe7d0000 /export/home1/jdk1.4.2/jre/lib/sparc/libverify.so
0xfe790000 /export/home1/jdk1.4.2/jre/lib/sparc/libjava.so
0xff020000 /export/home1/jdk1.4.2/jre/lib/sparc/libzip.so
0xfe610000 /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.2
0xfe550000 /export/home1/jdk1.4.2/jre/lib/sparc/libhprof.so

Heap at VM Abort:
Heap
 def new generation total 2981696K, used 2981696K [0x14400000, 0xcfc00000, 0xcfc00000)
  eden space 2891392K, 100% used [0x14400000, 0xc4ba0000, 0xc4ba0000)
  from space 90304K, 100% used [0xc4ba0000, 0xca3d0000, 0xca3d0000)
  to space 90304K, 0% used [0xca3d0000, 0xca3d0000, 0xcfc00000)
 tenured generation total 614400K, used 1864K [0xcfc00000, 0xf5400000, 0xf5400000)
   the space 614400K, 0% used [0xcfc00000, 0xcfdd22f8, 0xcfdd2400, 0xf5400000)
 compacting perm gen total 4096K, used 2298K [0xf5400000, 0xf5800000, 0xf9400000)
   the space 4096K, 56% used [0xf5400000, 0xf563eab8, 0xf563ec00, 0xf5800000)

Local Time = Tue Feb 28 05:10:07 2006
Elapsed Time = 44
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2-b28 mixed mode)
#

Misc. info:
==========
uname -a on that system reads:
SunOS hppdl694 5.8 Generic_108528-14 sun4u sparc SUNW,Ultra-4