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path: root/pkg/sentry/pgalloc/evictable_range.go
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Diffstat (limited to 'pkg/sentry/pgalloc/evictable_range.go')
-rw-r--r--pkg/sentry/pgalloc/evictable_range.go14
1 files changed, 14 insertions, 0 deletions
diff --git a/pkg/sentry/pgalloc/evictable_range.go b/pkg/sentry/pgalloc/evictable_range.go
index 10ce2ff44..79f513ac2 100644
--- a/pkg/sentry/pgalloc/evictable_range.go
+++ b/pkg/sentry/pgalloc/evictable_range.go
@@ -13,27 +13,37 @@ type EvictableRange struct {
// WellFormed returns true if r.Start <= r.End. All other methods on a Range
// require that the Range is well-formed.
+//
+//go:nosplit
func (r EvictableRange) WellFormed() bool {
return r.Start <= r.End
}
// Length returns the length of the range.
+//
+//go:nosplit
func (r EvictableRange) Length() uint64 {
return r.End - r.Start
}
// Contains returns true if r contains x.
+//
+//go:nosplit
func (r EvictableRange) Contains(x uint64) bool {
return r.Start <= x && x < r.End
}
// Overlaps returns true if r and r2 overlap.
+//
+//go:nosplit
func (r EvictableRange) Overlaps(r2 EvictableRange) bool {
return r.Start < r2.End && r2.Start < r.End
}
// IsSupersetOf returns true if r is a superset of r2; that is, the range r2 is
// contained within r.
+//
+//go:nosplit
func (r EvictableRange) IsSupersetOf(r2 EvictableRange) bool {
return r.Start <= r2.Start && r.End >= r2.End
}
@@ -41,6 +51,8 @@ func (r EvictableRange) IsSupersetOf(r2 EvictableRange) bool {
// Intersect returns a range consisting of the intersection between r and r2.
// If r and r2 do not overlap, Intersect returns a range with unspecified
// bounds, but for which Length() == 0.
+//
+//go:nosplit
func (r EvictableRange) Intersect(r2 EvictableRange) EvictableRange {
if r.Start < r2.Start {
r.Start = r2.Start
@@ -57,6 +69,8 @@ func (r EvictableRange) Intersect(r2 EvictableRange) EvictableRange {
// CanSplitAt returns true if it is legal to split a segment spanning the range
// r at x; that is, splitting at x would produce two ranges, both of which have
// non-zero length.
+//
+//go:nosplit
func (r EvictableRange) CanSplitAt(x uint64) bool {
return r.Contains(x) && r.Start < x
}