| /* |
| * Copyright 2016 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. |
| */ |
| |
| #ifndef __VTS_PROTO_FUZZER_UTILS_H__ |
| #define __VTS_PROTO_FUZZER_UTILS_H__ |
| |
| #include <unistd.h> |
| #include <iostream> |
| #include <random> |
| #include <string> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "driver_base/DriverBase.h" |
| #include "test/vts/proto/ExecutionSpecificationMessage.pb.h" |
| |
| namespace android { |
| namespace vts { |
| namespace fuzzer { |
| |
| // Use shorter names for convenience. |
| using CompSpec = ComponentSpecificationMessage; |
| using ExecSpec = ExecutionSpecificationMessage; |
| using FuncCall = FunctionCallMessage; |
| using FuncSpec = FunctionSpecificationMessage; |
| using IfaceSpec = InterfaceSpecificationMessage; |
| |
| // VariableSpecificationMessage can be used to describe 3 things: a type |
| // declaration, a variable declaration, or a runtime variable instance. These |
| // use cases correspond to TypeSpec, VarSpec, and VarInstance respectively. |
| using TypeSpec = VariableSpecificationMessage; |
| using VarInstance = TypeSpec; |
| using VarSpec = TypeSpec; |
| |
| using EnumData = EnumDataValueMessage; |
| using ScalarData = ScalarDataValueMessage; |
| |
| // 64-bit random number generator. |
| class Random { |
| public: |
| Random(uint64_t seed) : rand_(seed) {} |
| virtual ~Random() {} |
| |
| // Generates a 64-bit random number. |
| virtual uint64_t Rand() { return rand_(); } |
| // Generates a random number in range [0, n). |
| virtual uint64_t operator()(uint64_t n) { return n ? Rand() % n : 0; } |
| |
| private: |
| // Used to generate a 64-bit Mersenne Twister pseudo-random number. |
| std::mt19937_64 rand_; |
| }; |
| |
| // Additional non-libfuzzer parameters passed to the fuzzer. |
| class ProtoFuzzerParams { |
| public: |
| // Number of function calls per execution (fixed throughout fuzzer run). |
| size_t exec_size_; |
| // VTS specs supplied to the fuzzer. |
| std::vector<CompSpec> comp_specs_; |
| // Name of target interface, e.g. "INfc". |
| std::string target_iface_; |
| // Controls whether HAL is opened in passthrough or binder mode. |
| // Passthrough mode is default. Used for testing. |
| bool binder_mode_ = false; |
| // Seed used to initialize the random number generator. |
| uint64_t seed_ = static_cast<uint64_t>(time(0)); |
| // Returns a string summarizing content of this object. |
| string DebugString() const; |
| }; |
| |
| // Parses command-line flags to create a ProtoFuzzerParams instance. |
| ProtoFuzzerParams ExtractProtoFuzzerParams(int, char **); |
| |
| // Returns CompSpec corresponding to given interface name. |
| const CompSpec &FindCompSpec(const std::vector<CompSpec> &, |
| const std::string &); |
| |
| // Creates a key, value look-up table with keys being names of predefined types, |
| // and values being their definitions. |
| std::unordered_map<std::string, TypeSpec> ExtractPredefinedTypes( |
| const std::vector<CompSpec> &); |
| |
| // Serializes ExecSpec into byte form and writes it to buffer. Returns number of |
| // written bytes. |
| size_t ToArray(uint8_t *, size_t, ExecSpec *); |
| |
| // Deserializes given buffer to an ExecSpec. Returns true on success. |
| bool FromArray(const uint8_t *, size_t, ExecSpec *); |
| |
| } // namespace fuzzer |
| } // namespace vts |
| } // namespace android |
| |
| #endif // __VTS_PROTO_FUZZER_UTILS_H__ |