pkg/fuzzer: remove signal rotation

Signal rotation is intended to make the fuzzer re-discover flaky coverage
in non flaky way. However, taking into accout that we get effectively
the same effect after each manager restart, and that the fuzzer is overloaded
with triage/smash jobs, it does not look to be worth it.

2 files changed, 5 insertions, 7 deletions

diff --git a/pkg/rpcserver/rpcserver.go b/pkg/rpcserver/rpcserver.go
index 58ef2d363..40ca9a316 100644
--- a/pkg/rpcserver/rpcserver.go
+++ b/pkg/rpcserver/rpcserver.go
@@ -344,7 +344,7 @@ func (serv *Server) connectionLoop(runner *Runner) error {
 			// buffer too much (we don't want to grow it larger than what will be needed
 			// to send programs).
 			n := min(len(maxSignal), 50000)
-			if err := runner.sendSignalUpdate(maxSignal[:n], nil); err != nil {
+			if err := runner.sendSignalUpdate(maxSignal[:n]); err != nil {
 				return err
 			}
 			maxSignal = maxSignal[n:]
@@ -489,11 +489,10 @@ func (serv *Server) ShutdownInstance(name string, crashed bool) ([]ExecRecord, [
 	return runner.shutdown(crashed)
 }
 
-func (serv *Server) DistributeSignalDelta(plus, minus signal.Signal) {
+func (serv *Server) DistributeSignalDelta(plus signal.Signal) {
 	plusRaw := plus.ToRaw()
-	minusRaw := minus.ToRaw()
 	serv.foreachRunnerAsync(func(runner *Runner) {
-		runner.sendSignalUpdate(plusRaw, minusRaw)
+		runner.sendSignalUpdate(plusRaw)
 	})
 }
 
diff --git a/pkg/rpcserver/runner.go b/pkg/rpcserver/runner.go
index b5903848f..219ef2c35 100644
--- a/pkg/rpcserver/runner.go
+++ b/pkg/rpcserver/runner.go
@@ -311,13 +311,12 @@ func (runner *Runner) convertCallInfo(call *flatrpc.CallInfo) {
 	}
 }
 
-func (runner *Runner) sendSignalUpdate(plus, minus []uint64) error {
+func (runner *Runner) sendSignalUpdate(plus []uint64) error {
 	msg := &flatrpc.HostMessage{
 		Msg: &flatrpc.HostMessages{
 			Type: flatrpc.HostMessagesRawSignalUpdate,
 			Value: &flatrpc.SignalUpdate{
-				NewMax:  runner.canonicalizer.Decanonicalize(plus),
-				DropMax: runner.canonicalizer.Decanonicalize(minus),
+				NewMax: runner.canonicalizer.Decanonicalize(plus),
 			},
 		},
 	}