prog: fix crash in createResource
We may be in createResource but have no resources at all because of ANYRES
that are not in target.Resources.
This is actually the case for some test targets. We have resources there,
but syscalls that create them are disabled.
In such case we crash in Intn(0).
Check that we have some resources before calling Intn.
diff --git a/prog/rand.go b/prog/rand.go
index c1ac767..e4164b7 100644
--- a/prog/rand.go
+++ b/prog/rand.go
@@ -265,7 +265,8 @@
defer func() { r.inCreateResource = false }()
kind := res.Desc.Name
- if r.oneOf(1000) {
+ // We may have no resources, but still be in createResource due to ANYRES.
+ if len(r.target.resourceMap) != 0 && r.oneOf(1000) {
// Spoof resource subkind.
var all []string
for kind1 := range r.target.resourceMap {
@@ -273,6 +274,10 @@
all = append(all, kind1)
}
}
+ if len(all) == 0 {
+ panic(fmt.Sprintf("got no spoof resources for %v in %v/%v",
+ kind, r.target.OS, r.target.Arch))
+ }
sort.Strings(all)
kind = all[r.Intn(len(all))]
}
