DSDP/DD/DSF CodingCamp MultiThreadingExcercise

Goals

• Enable multi-threaded debugging with DSF

Existing Components

Run Control Service

Interface

org.eclipse.dd.dsf.debug.service.IRunControl

Standard MI implementation

org.eclipse.dd.dsf.mi.service.MIRunControl

GDB-specific extensions

org.eclipse.dd.dsf.mi.service.GDBRunControl

Existing functionality

• Basic run control functions (run, suspend, step) for a single thread.
• Tracking state and generating events for a single thread (running, stopped)

Missing functionality

• Retrieving list of thread contexts from back end
• Enabling run control commands for multiple threads (using -thread-select)
• Tracking state of multiple threads
• Generating started/stopped events when new threads are discovered or when threads disappear

Command Control Service

Interface

org.eclipse.dd.dsf.debug.service.command.ICommandControl

Standard MI implementation

org.eclipse.dd.dsf.mi.command.AbstractMIControl

GDB-specific extensions

org.eclipse.dd.dsf.mi.commandGDBControl

Existing functionaliyt

• Queueing/Sending of MI commands to back end.
• Receiving responses of MI commands and out-of-band records

Missing Functionality

• Tracking currently selected thread-id through -thread-select
• Tracking currently selected frame #, through -stack-frame-select

Command Cache

Implementation

org.eclipse.dd.dsf.mi.service.control.MICommandCache

Existing functionality

Managing command requests for the same piece of data

Caching command results

Coalescing commands which retrieve ranges of data

Missing functionality

Maintaining separate cache data for different contexts

Passing context information for commands on to the Command Control service.