commit ecf5e567ac97748287f1ce98182c2dd2ca5f8e8c
author kcc <kcc> Thu May 23 01:03:42 2019 +0000
committer kcc <kcc> Thu May 23 01:03:42 2019 +0000
tree 541189eb3be09a817d37f014af40c5b3b0053c18
parent d701d9e213d3d7149ff9739a8b385ab3a0c02962

[libFuzzer] remove the data-flow-trace (DFT) python scripts; their functionality is now part of libFuzzer proper; also write functions.txt to the disk only if this file doesn't exist yet

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@361452 91177308-0d34-0410-b5e6-96231b3b80d8

FuzzerDataFlowTrace.cpp

diff --git a/FuzzerDataFlowTrace.cpp b/FuzzerDataFlowTrace.cpp
index 74bfa8f..c67238e 100644
--- a/FuzzerDataFlowTrace.cpp
+++ b/FuzzerDataFlowTrace.cpp
@@ -310,11 +310,14 @@
       OF << C << std::endl;
   }
   RemoveFile(Temp);
-  // Write functions.txt.
-  Command Cmd;
-  Cmd.addArgument(DFTBinary);
-  Cmd.setOutputFile(DirPlusFile(DirPath, "functions.txt"));
-  ExecuteCommand(Cmd);
+  // Write functions.txt if it's currently empty or doesn't exist.
+  auto FunctionsTxtPath = DirPlusFile(DirPath, "functions.txt");
+  if (FileToString(FunctionsTxtPath).empty()) {
+    Command Cmd;
+    Cmd.addArgument(DFTBinary);
+    Cmd.setOutputFile(FunctionsTxtPath);
+    ExecuteCommand(Cmd);
+  }
   return 0;
 }