Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 55 insertions, 0 deletions

diff --git a/clang-r353983/prebuilt_include/llvm/lib/Fuzzer/FuzzerDataFlowTrace.h b/clang-r353983/prebuilt_include/llvm/lib/Fuzzer/FuzzerDataFlowTrace.h
new file mode 100644
index 00000000..9523a01e
--- /dev/null
+++ b/clang-r353983/prebuilt_include/llvm/lib/Fuzzer/FuzzerDataFlowTrace.h
@@ -0,0 +1,55 @@
+//===- FuzzerDataFlowTrace.h - Internal header for the Fuzzer ---*- C++ -* ===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// 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"
+
+#include <unordered_map>
+#include <vector>
+#include <string>
+
+namespace fuzzer {
+class DataFlowTrace {
+ public:
+  void Init(const std::string &DirPath, const std::string &FocusFunction);
+  void Clear() { Traces.clear(); }
+  const Vector<uint8_t> *Get(const std::string &InputSha1) const {
+    auto It = Traces.find(InputSha1);
+    if (It != Traces.end())
+      return &It->second;
+    return nullptr;
+  }
+
+ private:
+  // Input's sha1 => DFT for the FocusFunction.
+  std::unordered_map<std::string, Vector<uint8_t> > Traces;
+};
+}  // namespace fuzzer
+
+#endif // LLVM_FUZZER_DATA_FLOW_TRACE