1 /* 2 * Copyright 2021 Code Intelligence GmbH 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <cstdint> 20 21 // This file declares variants of the libFuzzer compare, division, switch and 22 // gep hooks that accept an additional caller_pc argument that can be used to 23 // pass a custom value that is recorded as the caller's instruction pointer 24 // ("program counter"). This allows synthetic program counters obtained from 25 // Java coverage information to be used with libFuzzer's value profile, with 26 // which it records detailed information about the result of compares and 27 // associates it with particular coverage locations. 28 // 29 // Note: Only the lower 9 bits of the caller_pc argument are used by libFuzzer. 30 extern "C" { 31 void __sanitizer_cov_trace_cmp4_with_pc(void *caller_pc, uint32_t arg1, 32 uint32_t arg2); 33 void __sanitizer_cov_trace_cmp8_with_pc(void *caller_pc, uint64_t arg1, 34 uint64_t arg2); 35 36 void __sanitizer_cov_trace_switch_with_pc(void *caller_pc, uint64_t val, 37 uint64_t *cases); 38 39 void __sanitizer_cov_trace_div4_with_pc(void *caller_pc, uint32_t val); 40 void __sanitizer_cov_trace_div8_with_pc(void *caller_pc, uint64_t val); 41 42 void __sanitizer_cov_trace_gep_with_pc(void *caller_pc, uintptr_t idx); 43 44 void __sanitizer_cov_trace_pc_indir_with_pc(void *caller_pc, uintptr_t callee); 45 } 46 47 void CalibrateTrampoline(); 48