add libfuzzer custom mutator, minor enhancements and fixes

1 files changed, 43 insertions, 0 deletions

diff --git a/custom_mutators/libfuzzer/FuzzerUtilLinux.cpp b/custom_mutators/libfuzzer/FuzzerUtilLinux.cpp
new file mode 100644
index 00000000..f2531bee
--- /dev/null
+++ b/custom_mutators/libfuzzer/FuzzerUtilLinux.cpp
@@ -0,0 +1,43 @@
+//===- FuzzerUtilLinux.cpp - Misc utils for Linux. ------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+// Misc utils for Linux.
+//===----------------------------------------------------------------------===//
+#include "FuzzerPlatform.h"
+#if LIBFUZZER_LINUX || LIBFUZZER_NETBSD || LIBFUZZER_FREEBSD || \
+    LIBFUZZER_OPENBSD || LIBFUZZER_EMSCRIPTEN
+  #include "FuzzerCommand.h"
+
+  #include <stdlib.h>
+  #include <sys/types.h>
+  #include <sys/wait.h>
+  #include <unistd.h>
+
+namespace fuzzer {
+
+int ExecuteCommand(const Command &Cmd) {
+
+  std::string CmdLine = Cmd.toString();
+  int         exit_code = system(CmdLine.c_str());
+  if (WIFEXITED(exit_code)) return WEXITSTATUS(exit_code);
+  return exit_code;
+
+}
+
+void DiscardOutput(int Fd) {
+
+  FILE *Temp = fopen("/dev/null", "w");
+  if (!Temp) return;
+  dup2(fileno(Temp), Fd);
+  fclose(Temp);
+
+}
+
+}  // namespace fuzzer
+
+#endif
+