Attaching to a JVM Suspended on a Thrown Exception

The target JVM can be invoked and then later suspended when a particular Java exception is thrown. The debugger can then attach to the suspended target JVM. There are two ways to attach the debugger to the target JVM: via shared memory or a network socket.

Shared Memory

Shared memory has the fastest debugging performance if it is supported by your JVM platform. The debugger and the target JVM must be executing on the same computer.

JDK 1.6

jdk1.6/bin/java -agentlib:jdwp=transport=dt_shmem,server=y,address=javadebug,onthrow=java.io.IOException,launch=d:/bin/debugstub.exe test.Test args

JDK 1.5

jdk1.5/bin/java -agentlib:jdwp=transport=dt_shmem,server=y,address=javadebug,onthrow=java.io.IOException,launch=d:/bin/debugstub.exe test.Test args

JDK 1.4

j2sdk1.4/bin/java -Xdebug -Xrunjdwp:transport=dt_shmem,server=y,address=javadebug,onthrow=java.io.IOException,launch=/usr/local/bin/debugstub test.Test args

JDK 1.3

jdk1.3/bin/java -classic -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_shmem,server=y,address=javadebug,onthrow=java.io.IOException,launch=/usr/local/bin/debugstub test.Test args

Socket

A network socket can connect the debugger and the target JVM that can be running on the same computer or different computers.

JDK 1.6

jdk1.6/bin/java -agentlib:jdwp=transport=dt_socket,server=y,address=8000,onthrow=java.io.IOException,launch=d:/bin/debugstub.exe test.Test args

JDK 1.5

jdk1.5/bin/java -agentlib:jdwp=transport=dt_socket,server=y,address=8000,onthrow=java.io.IOException,launch=d:/bin/debugstub.exe test.Test args

JDK 1.4

jdk1.4/bin/java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,onthrow=java.io.IOException,launch=/usr/local/bin/debugstub test.Test args

JDK 1.3

jdk1.3/bin/java -classic -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,address=8000,onthrow=java.io.IOException,launch=/usr/local/bin/debugstub test.Test args

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