X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=src%2Fruntime%2Fgcinfo_test.go;h=5f72caf0ecebfbed9c98ca02e4241ca2ac119262;hb=38ac7c41aa54306c0bdc04a092838103a7d09997;hp=787160dc2779c8583240e35f0fcc60b172842da8;hpb=25867485a748bbefc938e66330912cd88c2f4acb;p=gostls13.git

diff --git a/src/runtime/gcinfo_test.go b/src/runtime/gcinfo_test.go
index 787160dc27..5f72caf0ec 100644
--- a/src/runtime/gcinfo_test.go
+++ b/src/runtime/gcinfo_test.go
@@ -91,10 +91,17 @@ func TestGCInfo(t *testing.T) {
 
 func verifyGCInfo(t *testing.T, name string, p any, mask0 []byte) {
 	mask := runtime.GCMask(p)
-	if !bytes.Equal(mask, mask0) {
-		t.Errorf("bad GC program for %v:\nwant %+v\ngot  %+v", name, mask0, mask)
+	if bytes.HasPrefix(mask, mask0) {
+		// Just the prefix matching is OK.
+		//
+		// The Go runtime's pointer/scalar iterator generates pointers beyond
+		// the size of the type, up to the size of the size class. This space
+		// is safe for the GC to scan since it's zero, and GCBits checks to
+		// make sure that's true. But we need to handle the fact that the bitmap
+		// may be larger than we expect.
 		return
 	}
+	t.Errorf("bad GC program for %v:\nwant %+v\ngot  %+v", name, mask0, mask)
 }
 
 func trimDead(mask []byte) []byte {