Add second batch of fuzzers for libutils
This adds fuzzers for:
- CallStack
- Looper
- LruCache
- Printer
- ProcessCallStack
- PropertyMap
- RWLock
- RefBase
- StopWatch.
Test: Ran each fuzzer for 10 minutes. Rough coverage est. (likely far below actual value): 10.97%
Signed-off-by: Dylan Katz <dylan.katz@leviathansecurity.com>
Change-Id: I2f9f35c18b13338c282fb7f9c3ea4099ecb2c56f
diff --git a/libutils/PropertyMap_fuzz.cpp b/libutils/PropertyMap_fuzz.cpp
new file mode 100755
index 0000000..fd50729
--- /dev/null
+++ b/libutils/PropertyMap_fuzz.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "android-base/file.h"
+#include "fuzzer/FuzzedDataProvider.h"
+#include "utils/PropertyMap.h"
+#include "utils/String8.h"
+
+static constexpr int MAX_FILE_SIZE = 256;
+static constexpr int MAX_STR_LEN = 2048;
+static constexpr int MAX_OPERATIONS = 1000;
+
+static const std::vector<std::function<void(FuzzedDataProvider*, android::PropertyMap)>>
+ operations = {
+ [](FuzzedDataProvider*, android::PropertyMap propertyMap) -> void {
+ propertyMap.getProperties();
+ },
+ [](FuzzedDataProvider*, android::PropertyMap propertyMap) -> void {
+ propertyMap.clear();
+ },
+ [](FuzzedDataProvider* dataProvider, android::PropertyMap propertyMap) -> void {
+ std::string keyStr = dataProvider->ConsumeRandomLengthString(MAX_STR_LEN);
+ android::String8 key = android::String8(keyStr.c_str());
+ propertyMap.hasProperty(key);
+ },
+ [](FuzzedDataProvider* dataProvider, android::PropertyMap propertyMap) -> void {
+ std::string keyStr = dataProvider->ConsumeRandomLengthString(MAX_STR_LEN);
+ android::String8 key = android::String8(keyStr.c_str());
+ android::String8 out;
+ propertyMap.tryGetProperty(key, out);
+ },
+ [](FuzzedDataProvider* dataProvider, android::PropertyMap propertyMap) -> void {
+ TemporaryFile tf;
+ // Generate file contents
+ std::string contents = dataProvider->ConsumeRandomLengthString(MAX_FILE_SIZE);
+ // If we have string contents, dump them into the file.
+ // Otherwise, just leave it as an empty file.
+ if (contents.length() > 0) {
+ const char* bytes = contents.c_str();
+ android::base::WriteStringToFd(bytes, tf.fd);
+ }
+ android::PropertyMap* mapPtr = &propertyMap;
+ android::PropertyMap::load(android::String8(tf.path), &mapPtr);
+ },
+ [](FuzzedDataProvider* dataProvider, android::PropertyMap propertyMap) -> void {
+ std::string keyStr = dataProvider->ConsumeRandomLengthString(MAX_STR_LEN);
+ std::string valStr = dataProvider->ConsumeRandomLengthString(MAX_STR_LEN);
+ android::String8 key = android::String8(keyStr.c_str());
+ android::String8 val = android::String8(valStr.c_str());
+ propertyMap.addProperty(key, val);
+ },
+};
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+ FuzzedDataProvider dataProvider(data, size);
+ android::PropertyMap proprtyMap = android::PropertyMap();
+
+ int opsRun = 0;
+ while (dataProvider.remaining_bytes() > 0 && opsRun++ < MAX_OPERATIONS) {
+ uint8_t op = dataProvider.ConsumeIntegralInRange<uint8_t>(0, operations.size() - 1);
+ operations[op](&dataProvider, proprtyMap);
+ }
+ return 0;
+}