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36 lines
1.3 KiB
Rust
36 lines
1.3 KiB
Rust
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use std::borrow::Borrow;
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use rustc_data_structures::profiling::EventArgRecorder;
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/// Extension trait for self-profiling purposes: allows to record spans within a generic activity's
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/// event arguments.
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pub trait SpannedEventArgRecorder {
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/// Records the following event arguments within the current generic activity being profiled:
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/// - the provided `event_arg`
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/// - a string representation of the provided `span`
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///
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/// Note: when self-profiling with costly event arguments, at least one argument
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/// needs to be recorded. A panic will be triggered if that doesn't happen.
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fn record_arg_with_span<A>(&mut self, event_arg: A, span: crate::Span)
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where
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A: Borrow<str> + Into<String>;
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}
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impl SpannedEventArgRecorder for EventArgRecorder<'_> {
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fn record_arg_with_span<A>(&mut self, event_arg: A, span: crate::Span)
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where
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A: Borrow<str> + Into<String>,
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{
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self.record_arg(event_arg);
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let span_arg = crate::with_session_globals(|session_globals| {
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if let Some(source_map) = &*session_globals.source_map.borrow() {
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source_map.span_to_embeddable_string(span)
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} else {
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format!("{:?}", span)
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}
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});
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self.record_arg(span_arg);
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}
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}
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