When using the HPROF agent with the monitor=y option for monitor
contention can potentially lead to infinite recursion and a stack
overflow.

The specific problem is that HPROF enters the internal
data_access_lock monitor when dealing with contended monitors -
if however the contended monitor is the data_access_lock monitor
itself we have recursive. Depending on the OS scheduling if the
thread holding the data_access_lock doesn't release it within
time it's possible for thread reporting the contention to overflow
its stack.

Name: tb29552 Date: 01/16/2001


h:\newMGCP\Java\src>java -version
java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

ran the following command
java -Xrunhprof:monitor=y,depth=20,thread=y -classpath .
com.telcordia.ar.callagent.CAMain -Dmgcp.trace=true -route_table_url
file:///h:/newMGCP/Java/hazy500.ep -mgcp_port 54321 -notified_entity "ca@glevin-
7.research.telcordia.com:54321"

program started running and terminated with message

#
# HotSpot Virtual Machine Error, EXCEPTION_STACK_OVERFLOW
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Error ID: 4F533F57494E13120E43505002D4
#

abnormal program termination


I tried the same program on Solaris and got slightly different, but no better
results.


>java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0)
Java HotSpot(TM) Client VM (build 1.3.0, mixed mode)


java -Xrunhprof:monitor=y,depth=20,thread=y -classpath .
com.telcordia.ar.callagent.CAMain -Dmgcp.trace=true -route_table_url
file:///u/gary/newMGCP/Java/hazy500.ep -mgcp_port 54321 -
notified_entity "###@###.###:54321"

... lines deleted ...
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, entered instead of enter
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, entered instead of enter
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
HPROF ERROR: contended monitor, enter instead of entered
runCA: 6359 Segmentation Fault(coredump)
hazy::/u/gary/newMGCP/Java/src:
>
(Review ID: 115187)
======================================================================

Name: bsC130419 Date: 07/23/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)


Using 1.4Beta plugin with Netscape 6.1
Open netscape
Go to URL www.telecordia.com

Unexpected Signal : 11 occurred at PC=0x4019858D
Function=method__5JNIid+0x15
Library=/usr/java/j2sdk1.4.0/jre/lib/i386/client/libjvm.so

Current Java thread:
        at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native
Method)
        at
sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(JSObject.java:361)
        at sun.plugin.javascript.navig5.JSObject.<init>(JSObject.java:77)
        at
sun.plugin.navig.motif.MotifAppletContext.nativeGetJSObject(MotifAppletContext.java:65)
        at
sun.plugin.ActivatorAppletContext.showStatus(ActivatorAppletContext.java:273)
        at sun.plugin.AppletViewer.showAppletStatus(AppletViewer.java:1237)
        at sun.applet.AppletPanel.runLoader(AppletPanel.java:521)
        at sun.applet.AppletPanel.run(AppletPanel.java:293)
        at
sun.plugin.navig.motif.MotifAppletViewer.maf_run(MotifAppletViewer.java:127)
        at
sun.plugin.navig.motif.MotifAppletViewer.run(MotifAppletViewer.java:123)
        at java.lang.Thread.run(Thread.java:579)
(Review ID: 128657)
======================================================================

Name: tb29552 Date: 11/28/2001


java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build Blackdown-1.3.1-FCS)
Java HotSpot(TM) Client VM (build Blackdown-1.3.1-FCS, mixed mode)



1. To reproduce the problem

a) Configure and compile the source code:

   cd <somewhere>
   gzip -dc muffin-0.9.3.tar.gz | tar -xvf -
   cd muffin-0.9.3
   Modify the configure script:
% diff configure configure~
615c615
< JAVADIRS="${JAVA_HOME} /usr/local/java /usr/local/jdk /usr/local/jdk1.1 ---
> JAVADIRS="/usr/local/java /usr/local/jdk /usr/local/jdk1.1
  ./configure
  gnumake all

b) Modify the file .../muffin-0.9.3/src/muffin:

< exec $JAVA org.doit.muffin.Main $*
> JAVA_XPROFILE=-Xrunhprof:cpu=samples,monitor=y
> JAVA_VMTYPE=-server
> exec $JAVA $JAVA_VMTYPE $JAVA_XPROFILE org.doit.muffin.Main $*

c) Run the program:
  cd .../muffin-0.9.3/src
  ./muffin

2. Java source code

http://download.sourceforge.net/muffin/muffin-0.9.3.tar.gz

3. Error message

HPROF ERROR: contended monitor, enter instead of entered
An irrecoverable stack overflow has occurred.

4. Trace

Unexpected Signal : 11 occurred at PC=0x4025d657
Function name=thread__18ThreadLocalStorage
Library=/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/server/libjvm.so

Current Java thread:

Dynamic libraries:
08048000-0804c000 r-xp 00000000 03:15 177063
/mnt/java/sun/j2sdk1.3.1/jre/bin/i386/native_threads/java
0804c000-0804d000 rw-p 00003000 03:15 177063
/mnt/java/sun/j2sdk1.3.1/jre/bin/i386/native_threads/java
40000000-40013000 r-xp 00000000 03:03 18166 /lib/ld-2.1.3.so
40013000-40014000 rw-p 00012000 03:03 18166 /lib/ld-2.1.3.so
40015000-40016000 r--p 00000000 03:05 40646
/usr/share/locale/en_GB/LC_MESSAGES/SYS_LC_MESSAGES
40016000-40017000 r--p 00000000 03:05 26424
/usr/share/locale/en_GB/LC_MONETARY
40017000-40018000 r--p 00000000 03:05 26426 /usr/share/locale/en_GB/LC_TIME
40018000-40019000 r--p 00000000 03:05 26425
/usr/share/locale/en_GB/LC_NUMERIC
4001c000-40027000 r-xp 00000000 03:03 18276 /lib/libpthread-0.8.so
40027000-4002e000 rw-p 0000a000 03:03 18276 /lib/libpthread-0.8.so
4002f000-4003a000 r-xp 00000000 03:15 48808
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/native_threads/libhpi.so
4003a000-4003b000 rw-p 0000a000 03:15 48808
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/native_threads/libhpi.so
4003b000-404b0000 r-xp 00000000 03:15 193062
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/server/libjvm.so
404b0000-404fa000 rw-p 00474000 03:15 193062
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/server/libjvm.so
40513000-40515000 r-xp 00000000 03:03 18261 /lib/libdl-2.1.3.so
40515000-40517000 rw-p 00001000 03:03 18261 /lib/libdl-2.1.3.so
40517000-40604000 r-xp 00000000 03:03 18254 /lib/libc-2.1.3.so
40604000-40608000 rw-p 000ec000 03:03 18254 /lib/libc-2.1.3.so
4060c000-4060d000 r-xp 00000000 03:03 18171 /lib/libBrokenLocale-2.1.3.so
4060d000-4060e000 rw-p 00000000 03:03 18171 /lib/libBrokenLocale-2.1.3.so
4060e000-40620000 r-xp 00000000 03:03 18263 /lib/libnsl-2.1.3.so
40620000-40622000 rw-p 00011000 03:03 18263 /lib/libnsl-2.1.3.so
40624000-40640000 r-xp 00000000 03:03 18262 /lib/libm-2.1.3.so
40640000-40641000 rw-p 0001b000 03:03 18262 /lib/libm-2.1.3.so
40642000-40654000 r-xp 00000000 03:15 209129
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libverify.so
40654000-40656000 rw-p 00011000 03:15 209129
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libverify.so
40656000-40679000 r-xp 00000000 03:15 209130
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libjava.so
40679000-4067b000 rw-p 00022000 03:15 209130
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libjava.so
4067c000-40691000 r-xp 00000000 03:15 209131
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libzip.so
40691000-40694000 rw-p 00014000 03:15 209131
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libzip.so
40694000-413ad000 r--s 00000000 03:15 128983
/mnt/java/sun/j2sdk1.3.1/jre/lib/rt.jar
413da000-4167f000 r--s 00000000 03:15 128984
/mnt/java/sun/j2sdk1.3.1/jre/lib/i18n.jar
4167f000-41695000 r--s 00000000 03:15 128971
/mnt/java/sun/j2sdk1.3.1/jre/lib/sunrsasign.jar
4b7bf000-4b7d5000 r--p 00000000 03:05 26423
/usr/share/locale/en_GB/LC_CTYPE
4b7d5000-4b7dd000 r--p 00000000 03:05 26422
/usr/share/locale/en_GB/LC_COLLATE
4b7e4000-4b7ec000 r-xp 00000000 03:03 18293 /lib/libnss_files-2.1.3.so
4b7ec000-4b7ed000 rw-p 00007000 03:03 18293 /lib/libnss_files-2.1.3.so
4b7ed000-4b7ff000 r-xp 00000000 03:15 209132
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libhprof.so
4b7ff000-4b800000 rw-p 00011000 03:15 209132
/mnt/java/sun/j2sdk1.3.1/jre/lib/i386/libhprof.so

Local Time = Sun Nov 25 03:30:13 2001
Elapsed Time = 3
#
# HotSpot Virtual Machine Error : 11
# Error ID : 4F530E43505002CC
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Server VM (Blackdown-1.3.1-FCS mixed mode)
(Review ID: 136229)
======================================================================

Name: egR10015 Date: 03/18/2002


This bug also affects the following testcases:

nsk/hprof/options/monitor/monitor001
nsk/hprof/options/monitor/monitor002
nsk/hprof/options/monitor/monitor003
nsk/hprof/options/monitor/monitor004
nsk/hprof/options/monitor/monitor005
nsk/hprof/options/monitor/monitor006
nsk/hprof/options/monitor/monitor007
nsk/hprof/options/lineno/lineno008
nsk/hprof/options/thread/thread008
nsk/hprof/options/doe/doe008

from testbase_nsk located at:

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

Eugene Gorbachev <###@###.###>

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