1 files changed, 52 insertions, 0 deletions
diff --git a/libutils/Printer_fuzz.cpp b/libutils/Printer_fuzz.cpp
new file mode 100755
index 000000000..0180d41f6
--- /dev/null
+++ b/libutils/Printer_fuzz.cpp
@@ -0,0 +1,52 @@
+/*
+ * 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 "android/log.h"
+#include "fuzzer/FuzzedDataProvider.h"
+#include "utils/Printer.h"
+#include "utils/String8.h"
+static constexpr int MAX_STR_SIZE = 1000;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    FuzzedDataProvider dataProvider(data, size);
+    android::String8 outStr = android::String8();
+    // Line indent/formatting
+    uint indent = dataProvider.ConsumeIntegral<uint>();
+    std::string prefix = dataProvider.ConsumeRandomLengthString(MAX_STR_SIZE);
+    std::string line = dataProvider.ConsumeRandomLengthString(MAX_STR_SIZE);
+
+    // Misc properties
+    std::string logTag = dataProvider.ConsumeRandomLengthString(MAX_STR_SIZE);
+    android_LogPriority priority =
+            static_cast<android_LogPriority>(dataProvider.ConsumeIntegral<int>());
+    bool ignoreBlankLines = dataProvider.ConsumeBool();
+
+    TemporaryFile tf;
+    android::FdPrinter filePrinter = android::FdPrinter(tf.fd, indent, prefix.c_str());
+    android::String8Printer stringPrinter = android::String8Printer(&outStr);
+    android::PrefixPrinter printer = android::PrefixPrinter(stringPrinter, prefix.c_str());
+    android::LogPrinter logPrinter =
+            android::LogPrinter(logTag.c_str(), priority, prefix.c_str(), ignoreBlankLines);
+
+    printer.printLine(line.c_str());
+    printer.printFormatLine("%s", line.c_str());
+    logPrinter.printLine(line.c_str());
+    logPrinter.printFormatLine("%s", line.c_str());
+    filePrinter.printLine(line.c_str());
+    filePrinter.printFormatLine("%s", line.c_str());
+    return 0;
+}