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/*
* Copyright (C) 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 <commonFuzzHelpers.h>
#include <fuzzer/FuzzedDataProvider.h>
#include <functional>
#include <string>
#include <vector>
#include "BufferedTextOutput.h"
namespace android {
class FuzzBufferedTextOutput : public BufferedTextOutput {
public:
FuzzBufferedTextOutput(uint32_t flags) : BufferedTextOutput(flags) {}
virtual status_t writeLines(const struct iovec& buf, size_t) {
size_t len = buf.iov_len;
void* tmp_buf = malloc(len);
if (tmp_buf == NULL) {
return status_t();
}
// This will attempt to read data from iov_base to ensure valid params were passed.
memcpy(tmp_buf, buf.iov_base, len);
free(tmp_buf);
return status_t();
}
};
// Fuzzer entry point.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp(data, size);
uint32_t flags = fdp.ConsumeIntegral<uint32_t>();
size_t push_count = 0;
std::shared_ptr<BufferedTextOutput> bTextOutput(new FuzzBufferedTextOutput(flags));
while (fdp.remaining_bytes() > 0) {
fdp.PickValueInArray<std::function<void()>>({
[&]() -> void {
bTextOutput->pushBundle();
push_count++;
},
[&]() -> void {
std::string txt = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());
size_t len = fdp.ConsumeIntegralInRange<size_t>(0, txt.length());
bTextOutput->print(txt.c_str(), len);
},
[&]() -> void {
if (push_count == 0) return;
bTextOutput->popBundle();
push_count--;
},
})();
}
return 0;
}
} // namespace android
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