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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "base/pickle.h"
#include <fuzzer/FuzzedDataProvider.h>
#include <string_view>
#include <tuple>
#include "base/containers/span.h"
namespace {
constexpr int kIterations = 16;
constexpr int kReadControlBytes = 32;
constexpr int kReadDataTypes = 17;
constexpr int kMaxReadLength = 1024;
constexpr int kMaxSkipBytes = 1024;
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
if (size < kReadControlBytes) {
return 0;
}
// Use the first kReadControlBytes bytes of the fuzzer input to control how
// the pickled data is read.
FuzzedDataProvider data_provider(data, kReadControlBytes);
data += kReadControlBytes;
size -= kReadControlBytes;
base::Pickle pickle =
base::Pickle::WithUnownedBuffer(UNSAFE_BUFFERS(base::span(data, size)));
base::PickleIterator iter(pickle);
for (int i = 0; i < kIterations; i++) {
uint8_t read_type = data_provider.ConsumeIntegral<uint8_t>();
switch (read_type % kReadDataTypes) {
case 0: {
bool result = 0;
std::ignore = iter.ReadBool(&result);
break;
}
case 1: {
int result = 0;
std::ignore = iter.ReadInt(&result);
break;
}
case 2: {
long result = 0;
std::ignore = iter.ReadLong(&result);
break;
}
case 3: {
uint16_t result = 0;
std::ignore = iter.ReadUInt16(&result);
break;
}
case 4: {
uint32_t result = 0;
std::ignore = iter.ReadUInt32(&result);
break;
}
case 5: {
int64_t result = 0;
std::ignore = iter.ReadInt64(&result);
break;
}
case 6: {
uint64_t result = 0;
std::ignore = iter.ReadUInt64(&result);
break;
}
case 7: {
float result = 0;
std::ignore = iter.ReadFloat(&result);
break;
}
case 8: {
double result = 0;
std::ignore = iter.ReadDouble(&result);
break;
}
case 9: {
std::string result;
std::ignore = iter.ReadString(&result);
break;
}
case 10: {
std::string_view result;
std::ignore = iter.ReadStringPiece(&result);
break;
}
case 11: {
std::u16string result;
std::ignore = iter.ReadString16(&result);
break;
}
case 12: {
std::u16string_view result;
std::ignore = iter.ReadStringPiece16(&result);
break;
}
case 13: {
const char* data_result = nullptr;
size_t length_result = 0;
std::ignore = iter.ReadData(&data_result, &length_result);
break;
}
case 14: {
const char* data_result = nullptr;
int read_length =
data_provider.ConsumeIntegralInRange(0, kMaxReadLength);
std::ignore =
iter.ReadBytes(&data_result, static_cast<size_t>(read_length));
break;
}
case 15: {
size_t result = 0;
std::ignore = iter.ReadLength(&result);
break;
}
case 16: {
std::ignore = iter.SkipBytes(static_cast<size_t>(
data_provider.ConsumeIntegralInRange(0, kMaxSkipBytes)));
break;
}
}
}
return 0;
}
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