Name: egR10015 Date: 03/26/2001



The JDI specs 1.3 and 1.4 must specify the requirement of mandatory reading
by a debugger all generated events for a target(debuggee) VM if these events
are enabled. Because if event generation is enabled and there is any generated
event which has not been read by the debugger, it causes the debugged VM to hang.
This unexpected behavior, led up to the debugged VM and the debugger VM
hangups, must be documented.

The following example illustates all mentioned above.
The test consists of debugger part (the file clsprepreq001.java) and debuggee
part (the file clsprepreq001t.java). The debugger does not process incoming
events for the debugged VM. When notification of ClassPrepare events is enabled
by calling the inherited method com.sun.jdi.request.ClassPrepareRequest.enable(),
the debugged VM hangs because System.exit(), invoked by it, does not really
terminate VM.
Note that this hangup is observed only if the debugged VM has been launched by
the default com.sun.jdi.connector.LaunchingConnector both with HS 1.4.0-beta-b56
and with HS 1.3.1-rc1-b19 on all platforms in all VM's modes.

To reproduce the bug run
doit.ksh <jdk root directory>
in
/net/sqesvr.eng/export/vsn/GammaBase/Bugs/<this bug number>

--------------- output on Solaris/Sparc with HS 1.4.0-beta-b56 ----------------
$ ./doit.ksh /home/eug/hotspot/jdk1.4/solsparc
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)
Java HotSpot(TM) Client VM (build 1.4-beta-B56, mixed mode)
Binder> Listening for a pipe connection to port: 7000
Binder> Binding to pipe socket
Binder> Listening to pipe server socket
Binder> VirtualMachineManager: version 1.4
Binder> LaunchingConnector:
Binder> name: com.sun.jdi.CommandLineLaunch
Binder> description: Launches target using Sun Java VM command line and atta
              ches to it
Binder> transport: dt_socket
Binder> Connector arguments:
Binder> home=/export/ld54/java/dest/jdk1.4.0beta-b56/solsparc
Binder> vmexec=java
Binder> options= -classpath ".:share/classes:/home/eug/hotspot/jdk1.4/solspa
              rc/lib/tools.jar"
Binder> main=clsprepreq001t "-verbose" "-waittime=2"
Binder> quote="
Binder> suspend=true
test.pipe> Waiting for pipe connection
debugee.err> debugee.pipe> Making pipe connection to socket: localhost:7000
Creating ClassPrepareRequest #0 with the property (first,a quick)...
Creating ClassPrepareRequest #1 with the property (second,brown)...
Creating ClassPrepareRequest #2 with the property (third,fox)...
Creating ClassPrepareRequest #3 with the property (fourth,jumps)...
Creating ClassPrepareRequest #4 with the property (fifth,over)...
Creating ClassPrepareRequest #5 with the property (sixth,the lazy)...
Creating ClassPrepareRequest #6 with the property (seventh,dog)...

Starting potential timed out section: waiting 2 minute(s) for debuggee's exit...
# ERROR: TEST FAILED: Timeout occured while waiting for debuggee's exit
Binder> Closing pipe server socket
test.pipe> Closing pipe socket
# ERROR: Debugee VM was not terminated yet. Trying to kill it.
exit code = 97
----------------------------------------------------------------------------

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