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