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[fuzzer] Add monster_debug target (#6513)

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Add the `monster_debug` target for better troubleshooting.
Improve oss-fuzz logs.
This commit is contained in:
Vladimir Glavnyy
2021-03-19 00:56:28 +07:00
committed by GitHub
parent ef8dd7792a
commit c992eafb5b
4 changed files with 60 additions and 8 deletions
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17
tests/fuzzer/flatbuffers_monster_fuzzer.cc
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@@ -44,9 +44,9 @@ static constexpr uint8_t flags_allow_non_utf8 = 0x20;
bool TestFileExists(fs::path file_path) {
if (file_path.has_filename() && fs::exists(file_path)) return true;
TEST_OUTPUT_LINE("@DEBUG: file '%s' not found", file_path.c_str());
TEST_OUTPUT_LINE("@DEBUG: file '%s' not found", file_path.string().c_str());
for (const auto &entry : fs::directory_iterator(file_path.parent_path())) {
TEST_OUTPUT_LINE("@DEBUG: parent path entry: '%s'", entry.path().c_str());
TEST_OUTPUT_LINE("@DEBUG: parent path entry: '%s'", entry.path().string().c_str());
}
return false;
}
@@ -55,7 +55,7 @@ std::string LoadBinarySchema(const char *file_name) {
const auto file_path = exe_path_.parent_path() / file_name;
TEST_EQ(true, TestFileExists(file_path));
std::string schemafile;
TEST_EQ(true, flatbuffers::LoadFile(file_path.c_str(), true, &schemafile));
TEST_EQ(true, flatbuffers::LoadFile(file_path.string().c_str(), true, &schemafile));
flatbuffers::Verifier verifier(
reinterpret_cast<const uint8_t *>(schemafile.c_str()), schemafile.size());
@@ -64,7 +64,7 @@ std::string LoadBinarySchema(const char *file_name) {
}
std::string do_test(const flatbuffers::IDLOptions &opts,
const std::string input_json) {
const std::string input_json, const bool check_parser) {
// once loaded from disk
static const std::string schemafile = LoadBinarySchema("monster_test.bfbs");
// parse schema first, so we can use it to parse the data after
@@ -82,6 +82,10 @@ std::string do_test(const flatbuffers::IDLOptions &opts,
TEST_EQ(true, MyGame::Example::VerifyMonsterBuffer(verifier));
TEST_ASSERT(
GenerateText(parser, parser.builder_.GetBufferPointer(), &jsongen));
} else if (check_parser) {
TEST_OUTPUT_LINE("parser failed with JSON:\n%s", input_json.c_str());
TEST_EQ_STR("", parser.error_.c_str());
TEST_ASSERT(false);
}
return jsongen;
};
@@ -94,6 +98,7 @@ std::string do_test(const flatbuffers::IDLOptions &opts,
// the directory where your fuzz target executable is located.
// You must not modify argv[0].
extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
(void)argc;
exe_path_ = (*argv)[0];
return 0;
}
@@ -117,9 +122,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
(flags & flags_skip_unexpected_fields_in_json);
opts.allow_non_utf8 = (flags & flags_allow_non_utf8);
const std::string jsongen_1 = do_test(opts, input);
const std::string jsongen_1 = do_test(opts, input, false);
if (!jsongen_1.empty()) {
const std::string jsongen_2 = do_test(opts, jsongen_1);
const std::string jsongen_2 = do_test(opts, jsongen_1, true);
TEST_EQ(jsongen_1, jsongen_2);
}
return 0;