Add more fuzzers and libFuzzer harness #553
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| name: test-fuzzer | ||
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| on: | ||
| push: | ||
| branches: [master, stable-*] | ||
| pull_request: | ||
| branches: [master, stable-*] | ||
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| jobs: | ||
| afl-tests: | ||
| name: Fuzzer Compilation ${{ matrix.compiler }} | ||
| runs-on: ubuntu-latest | ||
| env: | ||
| CC: ${{ matrix.compiler }} | ||
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| strategy: | ||
| matrix: | ||
| compiler: [clang, gcc] | ||
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| steps: | ||
| - uses: actions/checkout@v2.4.0 | ||
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| - name: Configure build | ||
| run: | | ||
| mkdir build | ||
| cd build | ||
| cmake -DCMAKE_BUILD_TYPE=Release .. | ||
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| - name: Build | ||
| run: | | ||
| cd build | ||
| make fuzzers | ||
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| - name: Run fuzzers once | ||
| run: | | ||
| cd build | ||
| for fuzzer in bin/fuzzer*; do | ||
| echo $fuzzer | ||
| $fuzzer --generate inputData | ||
| $fuzzer inputData | ||
| done | ||
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| libfuzzer-test: | ||
| name: LibFuzzer Compilation ${{ matrix.compiler }} | ||
| runs-on: ubuntu-latest | ||
| env: | ||
| CC: ${{ matrix.compiler }} | ||
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| strategy: | ||
| matrix: | ||
| compiler: [clang] | ||
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| steps: | ||
| - uses: actions/checkout@v2.4.0 | ||
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| - name: Configure build | ||
| run: | | ||
| mkdir build | ||
| cd build | ||
| cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_LIBFUZZER=ON .. | ||
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| - name: Build | ||
| run: | | ||
| cd build | ||
| make fuzzers | ||
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| - name: Run fuzzers once | ||
| run: | | ||
| cd build | ||
| for fuzzer in bin/fuzzer*; do | ||
| echo $fuzzer | ||
| # TODO: Increase run count | ||
| $fuzzer -runs=1000 | ||
| done |
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| /* | ||
| * Copyright 2021 Uber Technologies, Inc. | ||
| * | ||
| * 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. | ||
| */ | ||
| /** @file aflHarness.h | ||
| * @brief Adapter from LLVM fuzzer to AFL++ | ||
| */ | ||
| #ifndef AFLHARNESS_H | ||
| #define AFLHARNESS_H | ||
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| #include <string.h> | ||
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| #include "utility.h" | ||
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| int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size); | ||
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| #ifndef H3_USE_LIBFUZZER | ||
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| /** | ||
| * Generate a AFL++ test case file of the right size initialized to all zeroes. | ||
| * | ||
| * @param filename | ||
| * @param expectedSize | ||
| * @return int | ||
| */ | ||
| int generateTestCase(const char *filename, size_t expectedSize) { | ||
| FILE *fp = fopen(filename, "wb"); | ||
| uint8_t zero = 0; | ||
| if (fwrite(&zero, sizeof(zero), expectedSize, fp) != expectedSize) { | ||
| error("Error writing\n"); | ||
| } | ||
| fclose(fp); | ||
| return 0; | ||
| } | ||
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| #define AFL_HARNESS_MAIN(expectedSize) \ | ||
| int main(int argc, char *argv[]) { \ | ||
| if (argc == 3) { \ | ||
| if (strcmp(argv[1], "--generate") != 0) { \ | ||
| error( \ | ||
| "Invalid option (should be --generate, otherwise look at " \ | ||
| "aflHarness.h to see options)"); \ | ||
| } \ | ||
| return generateTestCase(argv[2], expectedSize); \ | ||
| } \ | ||
| if (argc != 2) { \ | ||
| error("Should have one argument (test case file)\n"); \ | ||
| } \ | ||
| const char *filename = argv[1]; \ | ||
| FILE *fp = fopen(filename, "rb"); \ | ||
| uint8_t data[expectedSize]; \ | ||
| if (fread(&data, expectedSize, 1, fp) != 1) { \ | ||
| error("Error reading\n"); \ | ||
| } \ | ||
| fclose(fp); \ | ||
| return LLVMFuzzerTestOneInput(data, expectedSize); \ | ||
| } | ||
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| #else | ||
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| #define AFL_HARNESS_MAIN(expectedSize) | ||
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| #endif // H3_USE_LIBFUZZER | ||
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| #endif // AFLHARNESS_H |
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Can you explain the frontend part of this?
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frontendin this context means an implementation ofmainthat accepts arguments in a way that AFL can integrate with. Should I expand on the comments for this option?