//===-- asan_scariness_score.h ----------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file is a part of AddressSanitizer, an address sanity checker. // // Compute the level of scariness of the error message. // Don't expect any deep science here, just a set of heuristics that suggest // that e.g. 1-byte-read-global-buffer-overflow is less scary than // 8-byte-write-stack-use-after-return. // // Every error report has one or more features, such as memory access size, // type (read or write), type of accessed memory (e.g. free-d heap, or a global // redzone), etc. Every such feature has an int score and a string description. // The overall score is the sum of all feature scores and the description // is a concatenation of feature descriptions. // Examples: // 17 (4-byte-read-heap-buffer-overflow) // 65 (multi-byte-write-stack-use-after-return) // 10 (null-deref) // //===----------------------------------------------------------------------===// #ifndef ASAN_SCARINESS_SCORE_H #define ASAN_SCARINESS_SCORE_H #include "asan_flags.h" #include "sanitizer_common/sanitizer_common.h" #include "sanitizer_common/sanitizer_libc.h" namespace __asan { struct ScarinessScoreBase { void Clear() { descr[0] = 0; score = 0; } void Scare(int add_to_score, const char *reason) { if (descr[0]) internal_strlcat(descr, "-", sizeof(descr)); internal_strlcat(descr, reason, sizeof(descr)); score += add_to_score; }; int GetScore() const { return score; } const char *GetDescription() const { return descr; } void Print() const { if (score && flags()->print_scariness) Printf("SCARINESS: %d (%s)\n", score, descr); } static void PrintSimple(int score, const char *descr) { ScarinessScoreBase SSB; SSB.Clear(); SSB.Scare(score, descr); SSB.Print(); } private: int score; char descr[1024]; }; struct ScarinessScore : ScarinessScoreBase { ScarinessScore() { Clear(); } }; } // namespace __asan #endif // ASAN_SCARINESS_SCORE_H |