Debugging from a call graph

A computer-based development system executed by a processor for debugging a debuggee program based on a call graph representing events that occurred during an execution of at least a portion of the debuggee program, the events ordered based on the execution, comprising:

• a) a call graph debugger that receives commands and requests for information and performs actions, including:
• i) selectively clustering together a first event corresponding to a first machine address and a source language statement and a second event corresponding to a second machine address and the source language statement, the first event and second event represented by respective nodes of the call graph, selectively clustering comprising if the second node is ordered after the first node and the second machine address is greater than the first machine address, determining to cluster together the first and second events;
• ii) in response to receiving a step debug command, performing a step operation that includes the first event and selectively includes the second event based on the selective clustering;
• iii) providing data indicative of whether the step operation includes the second event;
• and
• iv) providing one or more variable values stored in association with an event represented by the call graph.

A computer-readable storage memory comprising computer program instructions for debugging a debuggee computer program based on a plurality of logged call trace events that result from an execution of at least a portion of the debuggee program, the program instructions executable by a processor to perform actions including:

• a) receiving an ordered set of the logged call trace events;
• b) determining whether to cluster together a subset of the set of the logged call trace events based on a machine address and a corresponding source language statement of each call trace event, the subset including at least two call trace events;
• and
• c) performing a step operation that includes the subset of logged call trace events based on the determining whether to cluster together the subset.