1 //===-- sanitizer/coverage_interface.h --------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Public interface for sanitizer coverage. 11 //===----------------------------------------------------------------------===// 12 13 #ifndef SANITIZER_COVERAG_INTERFACE_H 14 #define SANITIZER_COVERAG_INTERFACE_H 15 16 #include <sanitizer/common_interface_defs.h> 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif 21 22 // Initialize coverage. 23 void __sanitizer_cov_init(); 24 // Record and dump coverage info. 25 void __sanitizer_cov_dump(); 26 // Open <name>.sancov.packed in the coverage directory and return the file 27 // descriptor. Returns -1 on failure, or if coverage dumping is disabled. 28 // This is intended for use by sandboxing code. 29 intptr_t __sanitizer_maybe_open_cov_file(const char *name); 30 // Get the number of unique covered blocks (or edges). 31 // This can be useful for coverage-directed in-process fuzzers. 32 uintptr_t __sanitizer_get_total_unique_coverage(); 33 // Get the number of unique indirect caller-callee pairs. 34 uintptr_t __sanitizer_get_total_unique_caller_callee_pairs(); 35 36 // Reset the basic-block (edge) coverage to the initial state. 37 // Useful for in-process fuzzing to start collecting coverage from scratch. 38 // Experimental, will likely not work for multi-threaded process. 39 void __sanitizer_reset_coverage(); 40 // Set *data to the array of covered PCs and return the size of that array. 41 // Some of the entries in *data will be zero. 42 uintptr_t __sanitizer_get_coverage_guards(uintptr_t **data); 43 44 // The coverage instrumentation may optionally provide imprecise counters. 45 // Rather than exposing the counter values to the user we instead map 46 // the counters to a bitset. 47 // Every counter is associated with 8 bits in the bitset. 48 // We define 8 value ranges: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+ 49 // The i-th bit is set to 1 if the counter value is in the i-th range. 50 // This counter-based coverage implementation is *not* thread-safe. 51 52 // Returns the number of registered coverage counters. 53 uintptr_t __sanitizer_get_number_of_counters(); 54 // Updates the counter 'bitset', clears the counters and returns the number of 55 // new bits in 'bitset'. 56 // If 'bitset' is nullptr, only clears the counters. 57 // Otherwise 'bitset' should be at least 58 // __sanitizer_get_number_of_counters bytes long and 8-aligned. 59 uintptr_t 60 __sanitizer_update_counter_bitset_and_clear_counters(uint8_t *bitset); 61 62 #ifdef __cplusplus 63 } // extern "C" 64 #endif 65 66 #endif // SANITIZER_COVERAG_INTERFACE_H 67
