Method and product for debugging a target java virtual machine having no debug information therein

A computer program product for use in debugging a virtual machine, the computer program product comprising:

• a proxy for storing debug information;
• means for receiving request packets sent by a debugger prior to receipt of the request packets by the virtual machine;
• means for processing the request packets so that required debug information is provided to predetermined packets of the request packets by said proxy;
• means for transmitting the processed predetermined request packets as reply packets to the debugger,
• means for transmitting non-predetermined packets as request packets to the virtual machine;
• means for receiving reply packets from the virtual machine;
• means for processing the received reply packets for reply to the debugger;
• and
• means for transmitting the processed received reply packets to the debugger.

An article of manufacture comprising a computer usable medium having computer readable program code means therein for use in debugging a virtual machine, in which debug information required by a debugger and normally included in a virus machine is included in a proxy, the computer readable program code means in said article of manufacture comprising:

• a proxy which includes debug information normally found in a virtual machine;
• computer readable code means for causing a computer to effect receiving request packets sent by a debugger prior to receipt of the request packets by the virtual machine;
• computer readable code means for causing a computer to effect processing the request packets so that required debug information is provided to predetermined packets of the request packets from said proxy;
• computer readable code means for causing a computer to effect transmitting the processed predetermined request packets as reply packets to the debugger;
• computer readable code means for causing a computer to effect transmitting non-predetermined request packets to the virtual machine;
• computer readable code means for causing a computer to effect receiving reply packets from the virtual machine;
• computer readable code means for causing a computer to effect processing the received reply packets for reply to the debugger;
• and
• computer readable code means for causing a computer to effect transmitting the processed received reply packets to the debugger.

A computer program product for use in debugging a Java virtual machine such that debug information required by a debugger normally included in the Java virtual machine is included in a proxy, the computer program product comprising:

• a proxy which includes debug information;
• means for receiving request packets from a debugger prior to receipt of the request packets by the Java virtual machine;
• means for processing the request packets so that required debug information is provided to predetermined packets of the request packets from said proxy;
• means for determining whether the request packets are required to be transmitted to the Java virtual machine and if not so required, transmitting first reply packets to the debugger;
• means for transmitting, if so required, the processed request packets to the Java virtual machine;
• means for receiving second reply packets from the Java virtual machine;
• means for processing the second reply packets for reply to the debugger;
• and
• means for transmitting the processed second reply packets to the debugger.

A computer program product for use in debugging a Java virtual machine such that debug information required by a debugger normally included in the Java virtual machine is included in a proxy, the computer program product comprising:

• a proxy which includes debug information;
• means for receiving request packets from a debugger prior to receipt of the request packets by the Java virtual machine;
• means for processing the request packets so that required debug information is provided to predetermined packets of the request packets by said proxy;
• means for transmitting the processed predetermined request packets as reply packets to the debugger;
• means for transmitting non-predetermined request packets to the Java virtual machine;
• means for receiving reply packets from the Java virtual machine;
• means for determining whether additional information is needed by the Java virtual machine and if so needed, transmitting one or more additional request packets to the Java virtual machine and receiving one or more additional reply packets from the Java virtual machine until the additional information is obtained;
• means for processing the received reply packets and additional reply packets, if any, for reply to the debugger;
• and
• means for transmitting the processed received reply packets to the debugger.