Add fuzzers for libutils classes
Adds fuzzers for BitSet, FileMap, String8, String16, and Vector.
Test: Ran fuzzers on Android Pixel 3a. Aggregate coverage was 1.2% (this is far lower than true coverage due to shared libraries being counted)
Change-Id: I739216fe88afa51dc2f73b857da91116853382f0
Removed unneeded cflags, moved libbase to defaults
Test: Built Android.bp successfully
Signed-off-by: Dylan Katz <dylan.katz@leviathansecurity.com>
Change-Id: I739216fe88afa51dc2f73b857da91116853382f0
diff --git a/libutils/Vector_fuzz.cpp b/libutils/Vector_fuzz.cpp
new file mode 100644
index 0000000..f6df051
--- /dev/null
+++ b/libutils/Vector_fuzz.cpp
@@ -0,0 +1,83 @@
+/*
+ * 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 "fuzzer/FuzzedDataProvider.h"
+#include "utils/Vector.h"
+static constexpr uint16_t MAX_VEC_SIZE = 5000;
+
+void runVectorFuzz(const uint8_t* data, size_t size) {
+ FuzzedDataProvider dataProvider(data, size);
+ android::Vector<uint8_t> vec = android::Vector<uint8_t>();
+ // We want to test handling of sizeof as well.
+ android::Vector<uint32_t> vec32 = android::Vector<uint32_t>();
+
+ // We're going to generate two vectors of this size
+ size_t vectorSize = dataProvider.ConsumeIntegralInRange<size_t>(0, MAX_VEC_SIZE);
+ vec.setCapacity(vectorSize);
+ vec32.setCapacity(vectorSize);
+ for (size_t i = 0; i < vectorSize; i++) {
+ uint8_t count = dataProvider.ConsumeIntegralInRange<uint8_t>(1, 5);
+ vec.insertAt((uint8_t)i, i, count);
+ vec32.insertAt((uint32_t)i, i, count);
+ vec.push_front(i);
+ vec32.push(i);
+ }
+
+ // Now we'll perform some test operations with any remaining data
+ // Index to perform operations at
+ size_t index = dataProvider.ConsumeIntegralInRange<size_t>(0, vec.size());
+ std::vector<uint8_t> remainingVec = dataProvider.ConsumeRemainingBytes<uint8_t>();
+ // Insert an array and vector
+ vec.insertArrayAt(remainingVec.data(), index, remainingVec.size());
+ android::Vector<uint8_t> vecCopy = android::Vector<uint8_t>(vec);
+ vec.insertVectorAt(vecCopy, index);
+ // Same thing for 32 bit vector
+ android::Vector<uint32_t> vec32Copy = android::Vector<uint32_t>(vec32);
+ vec32.insertArrayAt(vec32Copy.array(), index, vec32.size());
+ vec32.insertVectorAt(vec32Copy, index);
+ // Replace single character
+ if (remainingVec.size() > 0) {
+ vec.replaceAt(remainingVec[0], index);
+ vec32.replaceAt(static_cast<uint32_t>(remainingVec[0]), index);
+ } else {
+ vec.replaceAt(0, index);
+ vec32.replaceAt(0, index);
+ }
+ // Add any remaining bytes
+ for (uint8_t i : remainingVec) {
+ vec.add(i);
+ vec32.add(static_cast<uint32_t>(i));
+ }
+ // Shrink capactiy
+ vec.setCapacity(remainingVec.size());
+ vec32.setCapacity(remainingVec.size());
+ // Iterate through each pointer
+ size_t sum = 0;
+ for (auto& it : vec) {
+ sum += it;
+ }
+ for (auto& it : vec32) {
+ sum += it;
+ }
+ // Cleanup
+ vec.clear();
+ vecCopy.clear();
+ vec32.clear();
+ vec32Copy.clear();
+}
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+ runVectorFuzz(data, size);
+ return 0;
+}
