Merge pull request #1927 from ghutchis/fuzz-testing

Add some initial fuzz IO tests

tests/io/CMakeLists.txt

@@ -51,3 +51,27 @@ foreach(TestName ${tests})
   add_test(NAME "Io-${TestName}"
     COMMAND AvogadroIOTests "--gtest_filter=${TestName}Test.*")
 endforeach()
+
+if (DEFINED ENV{LIB_FUZZING_ENGINE})
+  option(ENABLE_FUZZ "Enable fuzz testing." ON)
+else()
+  option(ENABLE_FUZZ "Enable fuzz testing." OFF)
+endif()
+
+if(ENABLE_FUZZ OR DEFINED ENV{LIB_FUZZING_ENGINE})
+  # todo - make this into a loop for multiple formats
+  set(fuzz
+    cjson
+    cml
+    sdf
+    pdb
+    xyz
+  )
+  foreach(fuzzName ${fuzz})
+    add_executable(fuzz_${fuzzName} fuzztest.cpp)
+    target_compile_definitions(fuzz_${fuzzName} PRIVATE -DFUZZ_INPUT_FORMAT="${fuzzName}")
+    target_compile_options(fuzz_${fuzzName} PRIVATE -g -fsanitize=fuzzer)
+    target_link_options(fuzz_${fuzzName} PRIVATE -fsanitize=fuzzer)
+    target_link_libraries(fuzz_${fuzzName} PRIVATE Avogadro::IO $ENV{LIB_FUZZING_ENGINE})
+  endforeach()
+endif()

tests/io/fuzztest.cpp

@@ -0,0 +1,23 @@
+/******************************************************************************
+  This source file is part of the Avogadro project.
+  This source code is released under the 3-Clause BSD License, (see "LICENSE").
+******************************************************************************/
+
+#include <avogadro/core/molecule.h>
+#include <avogadro/io/fileformat.h>
+#include <avogadro/io/fileformatmanager.h>
+
+using Avogadro::Core::Molecule;
+using Avogadro::Io::FileFormatManager;
+
+// FUZZ_INPUT_FORMAT is defined in the build system
+// e.g., "cjson", "sdf", "xyz", etc.
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size)
+{
+  std::string input(reinterpret_cast<const char*>(Data), Size);
+
+  Molecule molecule;
+  FileFormatManager::instance().readString(molecule, input, FUZZ_INPUT_FORMAT);
+
+  return 0;
+}