0000586: Allow querying single stack frames using debug_info(DINFO_TRACE)

ID	Project	Category	View Status	Date Submitted	Last Update

0000586	LDMud	Efuns	public	2008-12-12 17:18	2008-12-29 18:15

Reporter	fufu	Assigned To
Priority	normal	Severity	feature	Reproducibility	N/A
Status	new	Resolution	open

Summary	0000586: Allow querying single stack frames using debug_info(DINFO_TRACE)
Description	There is some demand for efuns like previous_function(), previous_program() and a variant of previous_object that reflects the actual control stack. In principle, debug_info(DINFO_TRACE, DIT_CURRENT) provides this information already, but it only allows to query the whole stack trace at once, and building that isn't exactly cheap. Proposal: Add an extra (optional) argument to debug_info: debug_info(DINFO_TRACE, DIT_CURRENT, n) would return the current (n=0), calling (n=1), and so on stack frame info, or 0 if the stack depth is exceeded. For consistency this should also be implemented for DIT_ERROR and DIT_UNCAUGHT_ERROR. Interestingly, performance is not an issue in those cases: The array is built when the error happens, and debug_info() just returns a reference to that.
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External Data (URL)

Date Modified	Username	Field	Change
2008-12-12 17:18	fufu	New Issue
2008-12-29 18:12	zesstra	Relationship added	related to 0000569
2008-12-29 18:15	zesstra	Note Added: 0000842
2009-09-30 17:58	zesstra	Relationship added	duplicate of 0000262
2009-10-02 09:55	zesstra	Relationship added	related to 0000202

duplicate of	0000262	closed	LDMud	caller_stack() should include function names
related to	0000569	closed	LDMud 3.3	Extend caller_stack() to optionally include filename, function name and line number information
related to	0000202	new	LDMud	New efuns: previous_program()

zesstra 2008-12-29 18:15 administrator ~0000842	In 0000569 was suggested to add a flag in the stack trace to indicate if the function call was a call_other (inter-object call) or a intra-object function call. I think, we should keep track of this suggestion here.