1 files changed, 61 insertions, 0 deletions
diff --git a/gnu/llvm/lib/Fuzzer/FuzzerDFSan.h b/gnu/llvm/lib/Fuzzer/FuzzerDFSan.h
new file mode 100644
index 00000000000..eb206ec61ce
--- /dev/null
+++ b/gnu/llvm/lib/Fuzzer/FuzzerDFSan.h
@@ -0,0 +1,61 @@
+//===- FuzzerDFSan.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.
+//
+//===----------------------------------------------------------------------===//
+// DFSan interface.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_FUZZER_DFSAN_H
+#define LLVM_FUZZER_DFSAN_H
+
+#define LLVM_FUZZER_SUPPORTS_DFSAN 0
+#if defined(__has_include)
+# if __has_include(<sanitizer/dfsan_interface.h>)
+#  if defined (__linux__)
+#   undef LLVM_FUZZER_SUPPORTS_DFSAN
+#   define LLVM_FUZZER_SUPPORTS_DFSAN 1
+#   include <sanitizer/dfsan_interface.h>
+#  endif  // __linux__
+# endif
+#endif  // defined(__has_include)
+
+#if LLVM_FUZZER_SUPPORTS_DFSAN
+
+extern "C" {
+__attribute__((weak))
+dfsan_label dfsan_create_label(const char *desc, void *userdata);
+__attribute__((weak))
+void dfsan_set_label(dfsan_label label, void *addr, size_t size);
+__attribute__((weak))
+void dfsan_add_label(dfsan_label label, void *addr, size_t size);
+__attribute__((weak))
+const struct dfsan_label_info *dfsan_get_label_info(dfsan_label label);
+__attribute__((weak))
+dfsan_label dfsan_read_label(const void *addr, size_t size);
+}  // extern "C"
+
+namespace fuzzer {
+static bool ReallyHaveDFSan() {
+  return &dfsan_create_label != nullptr;
+}
+}  // namespace fuzzer
+#else
+// When compiling with a compiler which does not support dfsan,
+// this code is still expected to build (but not necessary work).
+typedef unsigned short dfsan_label;
+struct dfsan_label_info {
+  dfsan_label l1, l2;
+  const char *desc;
+  void *userdata;
+};
+namespace fuzzer {
+static bool ReallyHaveDFSan() { return false; }
+}  // namespace fuzzer
+
+#endif
+
+#endif // LLVM_FUZZER_DFSAN_H