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Diffstat (limited to 'libgo/go/runtime/select.go')
-rw-r--r--libgo/go/runtime/select.go5
1 files changed, 5 insertions, 0 deletions
diff --git a/libgo/go/runtime/select.go b/libgo/go/runtime/select.go
index 45cc284..31272b0 100644
--- a/libgo/go/runtime/select.go
+++ b/libgo/go/runtime/select.go
@@ -106,6 +106,10 @@ func block() {
// Both reside on the goroutine's stack (regardless of any escaping in
// selectgo).
//
+// For race detector builds, pc0 points to an array of type
+// [ncases]uintptr (also on the stack); for other builds, it's set to
+// nil.
+//
// selectgo returns the index of the chosen scase, which matches the
// ordinal position of its respective select{recv,send,default} call.
// Also, if the chosen scase was a receive operation, it reports whether
@@ -124,6 +128,7 @@ func selectgo(cas0 *scase, order0 *uint16, nsends, nrecvs int, block bool) (int,
scases := cas1[:ncases:ncases]
pollorder := order1[:ncases:ncases]
lockorder := order1[ncases:][:ncases:ncases]
+ // NOTE: pollorder/lockorder's underlying array was not zero-initialized by compiler.
var t0 int64
if blockprofilerate > 0 {