1 files changed, 16 insertions, 0 deletions
diff --git a/src/runtime/export_test.go b/src/runtime/export_test.go
index 5206fa0109..d8cf2acad8 100644
--- a/src/runtime/export_test.go
+++ b/src/runtime/export_test.go
@@ -734,6 +734,16 @@ func (p *PageAlloc) Scavenge(nbytes uintptr, locked bool) (r uintptr) {
 	})
 	return
 }
+func (p *PageAlloc) InUse() []AddrRange {
+	ranges := make([]AddrRange, 0, len(p.inUse.ranges))
+	for _, r := range p.inUse.ranges {
+		ranges = append(ranges, AddrRange{
+			Base:  r.base,
+			Limit: r.limit,
+		})
+	}
+	return ranges
+}
 
 // Returns nil if the PallocData's L2 is missing.
 func (p *PageAlloc) PallocData(i ChunkIdx) *PallocData {
@@ -745,6 +755,12 @@ func (p *PageAlloc) PallocData(i ChunkIdx) *PallocData {
 	return (*PallocData)(&l2[ci.l2()])
 }
 
+// AddrRange represents a range over addresses.
+// Specifically, it represents the range [Base, Limit).
+type AddrRange struct {
+	Base, Limit uintptr
+}
+
 // BitRange represents a range over a bitmap.
 type BitRange struct {
 	I, N uint // bit index and length in bits