| //===-- 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 |