P3
Jdk1.2, jdk1.1.5
The problem:
I allocate a byte array of size 483183813, later I try to access
element 483183812 and I get:
java.lang.ArrayIndexOutOfBoundsException: 483183812
at memtest.main(memtest.java:14)
This also happened for a byte array of size 536870904.
It did not happen for a byte array of size 104857592 and 1048568.
The Program:
import java.lang.*;
class memtest {
public static void main(String args[]) {
byte buf[];
long max;
int maxmem;
Runtime rt = Runtime.getRuntime();
max = rt.totalMemory();
System.out.println("max " + max);
maxmem = (int) (max * .9);
System.out.println("maxmem " + maxmem);
buf = new byte[maxmem];
buf[maxmem - 1] = 3;
System.out.println("maxmem " + maxmem);
}
}
The run:
illium% javac -O memtest.java
illium% !/bin
/bin/time java -Xms512M -Xmx1024M memtest
max 536870904
maxmem 483183813
java.lang.ArrayIndexOutOfBoundsException: 483183812
at memtest.main(memtest.java:14)
real 7:15.2
user 9.4
sys 11.0
The second program:
import java.lang.*;
class memtest1 {
public static void main(String args[]) {
byte buf[];
long max;
int maxmem;
Runtime rt = Runtime.getRuntime();
max = rt.totalMemory();
System.out.println("max " + max);
maxmem = (int) max;
System.out.println("maxmem " + maxmem);
buf = new byte[maxmem];
for (int i = 0; i < maxmem;i++) {
buf[i] = (byte) 3;
}
System.out.println("maxmem " + maxmem);
}
}
Runs of the second program:
illium% !!
/bin/time java -Xms256M -Xmx1024M memtest1
max 268435448
maxmem 268435448
java.lang.ArrayIndexOutOfBoundsException: 134217720
at memtest1.main(memtest1.java:15)
real 7:01.2
user 2:03.2
sys 6.9
[1] + Done hotjava
illium% ^256^130
/bin/time java -Xms130M -Xmx1024M memtest1
max 136314872
maxmem 136314872
java.lang.ArrayIndexOutOfBoundsException: 2097144
at memtest1.main(memtest1.java:15)
real 37.7
user 3.7
sys 2.2
The environment:
illium% which java
/usr/local/java/jdk1.2/solaris/bin/java
illium% which javac
/usr/local/java/jdk1.2/solaris/bin/javac
Machine hardware: sun4u
OS version: 5.6
Processor type: sparc
Hardware: SUNW,Ultra-1
illium% ls /var/sadm/patch
105214-01 105223-01 105375-03 105397-01 105416-01 105492-01 105529-01
105216-01 105356-01 105379-01 105405-01 105464-01 105516-01
105222-01 105357-01 105393-01 105407-01 105472-01 105528-01
MANPATH=/usr/man:/usr/openwin/share/man:/usr/dt/man
DTDATABASESEARCHPATH=/home/jstampfl/.dt/types/fp_dynamic,/home/jstampfl/.dt/types,/etc/dt/appconfig/types/%L,/etc/dt/appconfig/types/C,/usr/dist/pkgs/cue/menus/std/cde/actions/types/%L,/usr/dist/pkgs/cue/menus/std/cde/actions/types/C,/usr/dt/appconfig/types/%L,/usr/dt/appconfig/types/C
DTXSERVERLOCATION=local
LANG=C
HELPPATH=/usr/openwin/lib/locale:/usr/openwin/lib/help
DTSOURCEPROFILE=true
PATH=.:/usr/ccs/bin:/usr/openwin/bin:/jstampfl/slidetool/bin:/jstampfl/bin:/jstampfl/java/HotJava1.1/bin:/usr/local/java/jdk1.2/solaris/bin:/usr/bin:/usr/dist/share/devpro,v4.2/5.x-sparc/bin:.:/usr/ccs/bin:/usr/openwin/bin:/jstampfl/slidetool/bin:/jstampfl/bin:/jstampfl/java/HotJava1.1/bin:/usr/local/java/jdk1.2/solaris/bin:/usr/bin:/usr/dist/share/devpro,v4.2/5.x-sparc/bin:/home/jstampfl/bin:/usr/dt/bin:/usr/openwin/bin:/usr/lib/lp/postscript:/usr/bin:/usr/sbin:/sbin:/usr/dist/local/exe:/usr/dist/exe:/usr/ucb:/usr/local/bin:.
AB_CARDCATALOG=/usr/dt/share/answerbooks/C/ab_cardcatalog
DTUSERSESSION=jstampfl-illium-0
XMICONBMSEARCHPATH=/home/jstampfl/.dt/icons/%B%M.bm:/home/jstampfl/.dt/icons/%B%M.pm:/home/jstampfl/.dt/icons/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B:/usr/dt/appconfig/icons/%L/%B%M.bm:/usr/dt/appconfig/icons/%L/%B%M.pm:/usr/dt/appconfig/icons/%L/%B:/usr/dt/appconfig/icons/C/%B%M.bm:/usr/dt/appconfig/icons/C/%B%M.pm:/usr/dt/appconfig/icons/C/%B
SESSION_SVR=illium
OPENWINHOME=/usr/openwin
EDITOR=vi
LOGNAME=jstampfl
DTSCREENSAVERLIST=StartDtscreenSwarm StartDtscreenQix StartDtscreenFlame StartDtscreenHop StartDtscreenImage StartDtscreenLife StartDtscreenRotor StartDtscreenPyro StartDtscreenWorm StartDtscreenBlank
MAIL=/var/mail/jstampfl
USER=jstampfl
DISPLAY=:0.0
SHELL=/bin/csh
FROM_CUE=1
DTAPPSEARCHPATH=/home/jstampfl/.dt/appmanager:/etc/dt/appconfig/appmanager/%L:/etc/dt/appconfig/appmanager/C:/usr/dist/pkgs/cue/menus/std/cde/actions/appmanager/%L:/usr/dist/pkgs/cue/menus/std/cde/actions/appmanager/C:/usr/dt/appconfig/appmanager/%L:/usr/dt/appconfig/appmanager/C
HOME=/home/jstampfl
XFILESEARCHPATH=/usr/openwin/lib/locale/%L/%T/%N%S:/usr/openwin/lib/%T/%N%S:/usr/dist/local/lib/%T/%N%S
XMICONSEARCHPATH=/home/jstampfl/.dt/icons/%B%M.pm:/home/jstampfl/.dt/icons/%B%M.bm:/home/jstampfl/.dt/icons/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B:/usr/dt/appconfig/icons/%L/%B%M.pm:/usr/dt/appconfig/icons/%L/%B%M.bm:/usr/dt/appconfig/icons/%L/%B:/usr/dt/appconfig/icons/C/%B%M.pm:/usr/dt/appconfig/icons/C/%B%M.bm:/usr/dt/appconfig/icons/C/%B
DTSPSYSAPPHOSTS=/usr/dist/pkgs/cue/menus/std/cde/actions
TERM=sun-cmd
dtstart_sessionlogfile=/dev/console
TZ=US/Pacific
DTHELPSEARCHPATH=/home/jstampfl/.dt/help/jstampfl-illium-0/%H:/home/jstampfl/.dt/help/jstampfl-illium-0/%H.sdl:/home/jstampfl/.dt/help/jstampfl-illium-0/%H.hv:/home/jstampfl/.dt/help/%H:/home/jstampfl/.dt/help/%H.sdl:/home/jstampfl/.dt/help/%H.hv:/usr/dt/appconfig/help/%L/%H:/usr/dt/appconfig/help/%L/%H.sdl:/usr/dt/appconfig/help/%L/%H.hv:/usr/dt/appconfig/help/C/%H:/usr/dt/appconfig/help/C/%H.sdl:/usr/dt/appconfig/help/C/%H.hv
XMBINDDIR=/usr/dt/lib/bindings
CUE=/usr/dist/pkgs/cue,v2.0.0
CUE_USERLEVEL=advanced
CUE_HOSTNAME=illium
DOMAIN=javasoft.eng.sun.com
NNTPSERVER=engnews2
JAVAHOME=/usr/local/java/jdk1.2/solaris
HOTJAVAHOME=/jstampfl/java/HotJava1.1
THREADS_FLAG=native
CLASSPATH=.:/usr/local/java/jdk1.2/solaris/lib/classes.zip:/usr/dist/share/netscape,v4.02/java/classes/
CUE_VERSION=2.0.0
CUE_OSNAME=SunOS
CUE_OSVERSION=5.6
CUE_OSMAJVERSION=5
CUE_ARCHTYPE=sparc
CUE_NETLINK=1
NPHOME=/usr/dist/pkgs/newsprint
PATH_EXCLUDE=.
ISOFAXHOME=/usr/dist/pkgs/isofax/solaris
LPDEST=sangria
CUE_SEMANTICS=POSIX
LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib:/usr/lib
OLWMMENU=/usr/dist/pkgs/cue/menus/std/ol/Default-Menu
XINITRC=/usr/dist/pkgs/cue/env/std/Xinitrc
PWD=/jstampfl/java/mem
WINDOW_TERMIOS=
TERMCAP=sun-cmd:te=\E[>4h:ti=\E[>4l:tc=sun:
illium% swap -l
swapfile dev swaplo blocks free
/dev/dsk/c0t0d0s1 32,1 16 615584 489296
/SWAP - 16 1048560 1030240
The problem:
I allocate a byte array of size 483183813, later I try to access
element 483183812 and I get:
java.lang.ArrayIndexOutOfBoundsException: 483183812
at memtest.main(memtest.java:14)
This also happened for a byte array of size 536870904.
It did not happen for a byte array of size 104857592 and 1048568.
The Program:
import java.lang.*;
class memtest {
public static void main(String args[]) {
byte buf[];
long max;
int maxmem;
Runtime rt = Runtime.getRuntime();
max = rt.totalMemory();
System.out.println("max " + max);
maxmem = (int) (max * .9);
System.out.println("maxmem " + maxmem);
buf = new byte[maxmem];
buf[maxmem - 1] = 3;
System.out.println("maxmem " + maxmem);
}
}
The run:
illium% javac -O memtest.java
illium% !/bin
/bin/time java -Xms512M -Xmx1024M memtest
max 536870904
maxmem 483183813
java.lang.ArrayIndexOutOfBoundsException: 483183812
at memtest.main(memtest.java:14)
real 7:15.2
user 9.4
sys 11.0
The second program:
import java.lang.*;
class memtest1 {
public static void main(String args[]) {
byte buf[];
long max;
int maxmem;
Runtime rt = Runtime.getRuntime();
max = rt.totalMemory();
System.out.println("max " + max);
maxmem = (int) max;
System.out.println("maxmem " + maxmem);
buf = new byte[maxmem];
for (int i = 0; i < maxmem;i++) {
buf[i] = (byte) 3;
}
System.out.println("maxmem " + maxmem);
}
}
Runs of the second program:
illium% !!
/bin/time java -Xms256M -Xmx1024M memtest1
max 268435448
maxmem 268435448
java.lang.ArrayIndexOutOfBoundsException: 134217720
at memtest1.main(memtest1.java:15)
real 7:01.2
user 2:03.2
sys 6.9
[1] + Done hotjava
illium% ^256^130
/bin/time java -Xms130M -Xmx1024M memtest1
max 136314872
maxmem 136314872
java.lang.ArrayIndexOutOfBoundsException: 2097144
at memtest1.main(memtest1.java:15)
real 37.7
user 3.7
sys 2.2
The environment:
illium% which java
/usr/local/java/jdk1.2/solaris/bin/java
illium% which javac
/usr/local/java/jdk1.2/solaris/bin/javac
Machine hardware: sun4u
OS version: 5.6
Processor type: sparc
Hardware: SUNW,Ultra-1
illium% ls /var/sadm/patch
105214-01 105223-01 105375-03 105397-01 105416-01 105492-01 105529-01
105216-01 105356-01 105379-01 105405-01 105464-01 105516-01
105222-01 105357-01 105393-01 105407-01 105472-01 105528-01
MANPATH=/usr/man:/usr/openwin/share/man:/usr/dt/man
DTDATABASESEARCHPATH=/home/jstampfl/.dt/types/fp_dynamic,/home/jstampfl/.dt/types,/etc/dt/appconfig/types/%L,/etc/dt/appconfig/types/C,/usr/dist/pkgs/cue/menus/std/cde/actions/types/%L,/usr/dist/pkgs/cue/menus/std/cde/actions/types/C,/usr/dt/appconfig/types/%L,/usr/dt/appconfig/types/C
DTXSERVERLOCATION=local
LANG=C
HELPPATH=/usr/openwin/lib/locale:/usr/openwin/lib/help
DTSOURCEPROFILE=true
PATH=.:/usr/ccs/bin:/usr/openwin/bin:/jstampfl/slidetool/bin:/jstampfl/bin:/jstampfl/java/HotJava1.1/bin:/usr/local/java/jdk1.2/solaris/bin:/usr/bin:/usr/dist/share/devpro,v4.2/5.x-sparc/bin:.:/usr/ccs/bin:/usr/openwin/bin:/jstampfl/slidetool/bin:/jstampfl/bin:/jstampfl/java/HotJava1.1/bin:/usr/local/java/jdk1.2/solaris/bin:/usr/bin:/usr/dist/share/devpro,v4.2/5.x-sparc/bin:/home/jstampfl/bin:/usr/dt/bin:/usr/openwin/bin:/usr/lib/lp/postscript:/usr/bin:/usr/sbin:/sbin:/usr/dist/local/exe:/usr/dist/exe:/usr/ucb:/usr/local/bin:.
AB_CARDCATALOG=/usr/dt/share/answerbooks/C/ab_cardcatalog
DTUSERSESSION=jstampfl-illium-0
XMICONBMSEARCHPATH=/home/jstampfl/.dt/icons/%B%M.bm:/home/jstampfl/.dt/icons/%B%M.pm:/home/jstampfl/.dt/icons/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B:/usr/dt/appconfig/icons/%L/%B%M.bm:/usr/dt/appconfig/icons/%L/%B%M.pm:/usr/dt/appconfig/icons/%L/%B:/usr/dt/appconfig/icons/C/%B%M.bm:/usr/dt/appconfig/icons/C/%B%M.pm:/usr/dt/appconfig/icons/C/%B
SESSION_SVR=illium
OPENWINHOME=/usr/openwin
EDITOR=vi
LOGNAME=jstampfl
DTSCREENSAVERLIST=StartDtscreenSwarm StartDtscreenQix StartDtscreenFlame StartDtscreenHop StartDtscreenImage StartDtscreenLife StartDtscreenRotor StartDtscreenPyro StartDtscreenWorm StartDtscreenBlank
MAIL=/var/mail/jstampfl
USER=jstampfl
DISPLAY=:0.0
SHELL=/bin/csh
FROM_CUE=1
DTAPPSEARCHPATH=/home/jstampfl/.dt/appmanager:/etc/dt/appconfig/appmanager/%L:/etc/dt/appconfig/appmanager/C:/usr/dist/pkgs/cue/menus/std/cde/actions/appmanager/%L:/usr/dist/pkgs/cue/menus/std/cde/actions/appmanager/C:/usr/dt/appconfig/appmanager/%L:/usr/dt/appconfig/appmanager/C
HOME=/home/jstampfl
XFILESEARCHPATH=/usr/openwin/lib/locale/%L/%T/%N%S:/usr/openwin/lib/%T/%N%S:/usr/dist/local/lib/%T/%N%S
XMICONSEARCHPATH=/home/jstampfl/.dt/icons/%B%M.pm:/home/jstampfl/.dt/icons/%B%M.bm:/home/jstampfl/.dt/icons/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/%L/%B:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.pm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B%M.bm:/usr/dist/pkgs/cue/menus/std/cde/actions/icons/C/%B:/usr/dt/appconfig/icons/%L/%B%M.pm:/usr/dt/appconfig/icons/%L/%B%M.bm:/usr/dt/appconfig/icons/%L/%B:/usr/dt/appconfig/icons/C/%B%M.pm:/usr/dt/appconfig/icons/C/%B%M.bm:/usr/dt/appconfig/icons/C/%B
DTSPSYSAPPHOSTS=/usr/dist/pkgs/cue/menus/std/cde/actions
TERM=sun-cmd
dtstart_sessionlogfile=/dev/console
TZ=US/Pacific
DTHELPSEARCHPATH=/home/jstampfl/.dt/help/jstampfl-illium-0/%H:/home/jstampfl/.dt/help/jstampfl-illium-0/%H.sdl:/home/jstampfl/.dt/help/jstampfl-illium-0/%H.hv:/home/jstampfl/.dt/help/%H:/home/jstampfl/.dt/help/%H.sdl:/home/jstampfl/.dt/help/%H.hv:/usr/dt/appconfig/help/%L/%H:/usr/dt/appconfig/help/%L/%H.sdl:/usr/dt/appconfig/help/%L/%H.hv:/usr/dt/appconfig/help/C/%H:/usr/dt/appconfig/help/C/%H.sdl:/usr/dt/appconfig/help/C/%H.hv
XMBINDDIR=/usr/dt/lib/bindings
CUE=/usr/dist/pkgs/cue,v2.0.0
CUE_USERLEVEL=advanced
CUE_HOSTNAME=illium
DOMAIN=javasoft.eng.sun.com
NNTPSERVER=engnews2
JAVAHOME=/usr/local/java/jdk1.2/solaris
HOTJAVAHOME=/jstampfl/java/HotJava1.1
THREADS_FLAG=native
CLASSPATH=.:/usr/local/java/jdk1.2/solaris/lib/classes.zip:/usr/dist/share/netscape,v4.02/java/classes/
CUE_VERSION=2.0.0
CUE_OSNAME=SunOS
CUE_OSVERSION=5.6
CUE_OSMAJVERSION=5
CUE_ARCHTYPE=sparc
CUE_NETLINK=1
NPHOME=/usr/dist/pkgs/newsprint
PATH_EXCLUDE=.
ISOFAXHOME=/usr/dist/pkgs/isofax/solaris
LPDEST=sangria
CUE_SEMANTICS=POSIX
LD_LIBRARY_PATH=/usr/dt/lib:/usr/openwin/lib:/usr/lib
OLWMMENU=/usr/dist/pkgs/cue/menus/std/ol/Default-Menu
XINITRC=/usr/dist/pkgs/cue/env/std/Xinitrc
PWD=/jstampfl/java/mem
WINDOW_TERMIOS=
TERMCAP=sun-cmd:te=\E[>4h:ti=\E[>4l:tc=sun:
illium% swap -l
swapfile dev swaplo blocks free
/dev/dsk/c0t0d0s1 32,1 16 615584 489296
/SWAP - 16 1048560 1030240