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tracing function with Graphviz
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et_selector(3erl) Erlang Module Definition et_selector(3erl) NAME
et_selector - Define event transforms and trace patterns DESCRIPTION
EXPORTS
make_pattern(RawPattern) -> TracePattern Types RawPattern = detail_level() TracePattern = erlang_trace_pattern_match_spec() detail_level() = min | max | integer(X) when X >= 0, X =< 100 Makes a trace pattern suitable to feed change_pattern/1 Min detail level deactivates tracing of calls to et:trace_me/4,5 Max detail level activates tracing of all calls to et:trace_me/4,5 integer(X) detail level activates tracing of all calls to et:trace_me/4,5 whose detail level argument is lesser than X. See also erlang:trace_pattern/2 for more info about its match_spec() change_pattern(Pattern) -> ok Types Pattern = detail_level() | empty_match_spec() | erlang_trace_pattern_match_spec() detail_level() = min | max | integer(X) when X >= 0, X =< 100 empty_match_spec() = [] Activates/deactivates tracing by changing the current trace pattern. min detail level deactivates tracing of calls to et:trace_me/4,5 max detail level activates tracing of all calls to et:trace_me/4,5 integer(X) detail level activates tracing of all calls to et:trace_me/4,5 whose detail level argument is lesser than X . An empty match spec deactivates tracing of calls to et:trace_me/4,5 Other match specs activates tracing of calls to et:trace_me/4,5 accordingly with erlang:trace_pattern/2 . parse_event(Mod, ValidTraceData) -> false | true | {true, Event} Types Mod = module_name() | undefined <v>module_name() = atom() <v>ValidTraceData = erlang_trace_data() | record(event) erlang_trace_data() = {trace, Pid, Label, Info} | {trace, Pid, Label, Info, Extra} | {trace_ts, Pid, Label, Info, ReportedTS} | {trace_ts, Pid, Label, Info, Extra, ReportedTS} | {seq_trace, Label, Info} | {seq_trace, Label, Info, ReportedTS} | {drop, NumberOfDroppedItems} Transforms trace data and makes an event record out of it. See erlang:trace/3 for more info about the semantics of the trace data. An event record consists of the following fields: detail_level : Noise has a high level as opposed to essentials. trace_ts : Time when the trace was generated. Same as event_ts if omitted in trace data. event_ts : Time when the event record was created. from : From actor, such as sender of a message. to : To actor, such as receiver of message. label : Label intended to provide a brief event summary. contents : All nitty gritty details of the event. See et:trace_me/4 and et:trace_me/5 for details. Returns: {true, Event} : where Event is an #event{} record representing the trace data true : means that the trace data already is an event record and that it is valid as it is. No transformation is needed. false : means that the trace data is uninteresting and should be dropped Ericsson AB et 1.4.2 et_selector(3erl)
