[libFuzzer] add a test that is built w/o coverage instrumentation but has the coverage rt (it should now fail with a descriptive message)
llvm-svn: 272090
diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index 5cfbad4..e397645 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -391,6 +391,11 @@
for (auto &X : Corpus)
UnitHashesAddedToCorpus.insert(Hash(X));
PrintStats("INITED");
+ if (Corpus.empty()) {
+ Printf("ERROR: no interesting inputs were found. "
+ "Is the code instrumented for coverage? Exiting.\n");
+ exit(1);
+ }
}
bool Fuzzer::UpdateMaxCoverage() {