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Diffstat (limited to 'test/core/util/fuzzer_util.cc')
-rw-r--r-- | test/core/util/fuzzer_util.cc | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/test/core/util/fuzzer_util.cc b/test/core/util/fuzzer_util.cc new file mode 100644 index 0000000000..29c9b8875f --- /dev/null +++ b/test/core/util/fuzzer_util.cc @@ -0,0 +1,82 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * 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 "test/core/util/fuzzer_util.h" + +#include <grpc/support/alloc.h> + +#include "src/core/lib/gpr/useful.h" + +namespace grpc_core { +namespace testing { + +uint8_t grpc_fuzzer_get_next_byte(input_stream* inp) { + if (inp->cur == inp->end) { + return 0; + } + return *inp->cur++; +} + +char* grpc_fuzzer_get_next_string(input_stream* inp, bool* special) { + char* str = nullptr; + size_t cap = 0; + size_t sz = 0; + char c; + do { + if (cap == sz) { + cap = GPR_MAX(3 * cap / 2, cap + 8); + str = static_cast<char*>(gpr_realloc(str, cap)); + } + c = static_cast<char>(grpc_fuzzer_get_next_byte(inp)); + str[sz++] = c; + } while (c != 0 && c != 1); + if (special != nullptr) { + *special = (c == 1); + } + if (c == 1) { + str[sz - 1] = 0; + } + return str; +} + +uint32_t grpc_fuzzer_get_next_uint32(input_stream* inp) { + uint8_t b = grpc_fuzzer_get_next_byte(inp); + uint32_t x = b & 0x7f; + if (b & 0x80) { + x <<= 7; + b = grpc_fuzzer_get_next_byte(inp); + x |= b & 0x7f; + if (b & 0x80) { + x <<= 7; + b = grpc_fuzzer_get_next_byte(inp); + x |= b & 0x7f; + if (b & 0x80) { + x <<= 7; + b = grpc_fuzzer_get_next_byte(inp); + x |= b & 0x7f; + if (b & 0x80) { + x = (x << 4) | (grpc_fuzzer_get_next_byte(inp) & 0x0f); + } + } + } + } + return x; +} + +} // namespace testing +} // namespace grpc_core |