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Make sure that queries have predictable symbol names.

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This commit is contained in:
Michael Woerister 2018-05-22 15:00:50 +02:00
parent 1bbae5f386
commit 599b79ebf5
1 changed files with 15 additions and 2 deletions
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17
src/librustc/ty/maps/plumbing.rs
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@ -697,6 +697,16 @@ macro_rules! define_maps {
})*
}
// This module and the functions in it exist only to provide a
// predictable symbol name prefix for query providers. This is helpful
// for analyzing queries in profilers.
pub(super) mod __query_compute {
$(#[inline(never)]
pub fn $name<F: FnOnce() -> R, R>(f: F) -> R {
f()
})*
}
$(impl<$tcx> QueryConfig<$tcx> for queries::$name<$tcx> {
type Key = $K;
type Value = $V;
@ -718,9 +728,12 @@ macro_rules! define_maps {
DepNode::new(tcx, $node(*key))
}
#[inline]
fn compute(tcx: TyCtxt<'_, 'tcx, '_>, key: Self::Key) -> Self::Value {
let provider = tcx.maps.providers[key.map_crate()].$name;
provider(tcx.global_tcx(), key)
__query_compute::$name(move || {
let provider = tcx.maps.providers[key.map_crate()].$name;
provider(tcx.global_tcx(), key)
})
}
fn handle_cycle_error(tcx: TyCtxt<'_, 'tcx, '_>) -> Self::Value {