[libFuzzer] initial implementation of -data_flow_trace. It parses the data flow trace and prints the summary, but doesn't use the information in any other way yet

llvm-svn: 334058

1 files changed, 40 insertions, 0 deletions

diff --git a/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.h b/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.h
new file mode 100644
index 00000000000..2b7b71fdbfa
--- /dev/null
+++ b/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.h
@@ -0,0 +1,40 @@
+//===- FuzzerDataFlowTrace.h - Internal header for the Fuzzer ---*- C++ -* ===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// fuzzer::DataFlowTrace; reads and handles a data-flow trace.
+//
+// A data flow trace is generated by e.g. dataflow/DataFlow.cpp
+// and is stored on disk in a separate directory.
+//
+// The trace dir contains a file 'functions.txt' which lists function names,
+// oner per line, e.g.
+// ==> functions.txt <==
+// Func2
+// LLVMFuzzerTestOneInput
+// Func1
+//
+// All other files in the dir are the traces, see dataflow/DataFlow.cpp.
+// The name of the file is sha1 of the input used to generate the trace.
+//
+// Current status:
+//   the data is parsed and the summary is printed, but the data is not yet
+//   used in any other way.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_FUZZER_DATA_FLOW_TRACE
+#define LLVM_FUZZER_DATA_FLOW_TRACE
+
+#include "FuzzerDefs.h"
+
+namespace fuzzer {
+struct DataFlowTrace {
+  void Init(const std::string &DirPath, const std::string &FocusFunction);
+};
+}  // namespace fuzzer
+
+#endif // LLVM_FUZZER_DATA_FLOW_TRACE