commit d701d9e213d3d7149ff9739a8b385ab3a0c02962
author kcc <kcc> Thu May 23 00:22:46 2019 +0000
committer kcc <kcc> Thu May 23 00:22:46 2019 +0000
tree 598283b3fa907db26f9ef5667c0e0905e94e6234
parent ed73fdffdc11e9c73f217c11199cc98e3cbce8cd

[libFuzzer] automatically collect the data flow trace (DFT) in the fork mode if -collect_data_flow= is given

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@361448 91177308-0d34-0410-b5e6-96231b3b80d8

FuzzerDataFlowTrace.cpp

diff --git a/FuzzerDataFlowTrace.cpp b/FuzzerDataFlowTrace.cpp
index 975a98a..74bfa8f 100644
--- a/FuzzerDataFlowTrace.cpp
+++ b/FuzzerDataFlowTrace.cpp
@@ -174,6 +174,8 @@
     if (*FocusFunction == L)
       FocusFuncIdx = NumFunctions - 1;
   }
+  if (!NumFunctions)
+    return false;
 
   if (*FocusFunction == "auto") {
     // AUTOFOCUS works like this: