43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
//===- FuzzerTracePC.cpp - PC tracing--------------------------------------===//
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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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// Trace PCs.
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// This module implements __sanitizer_cov_trace_pc_guard[_init],
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// the callback required for -fsanitize-coverage=trace-pc-guard instrumentation.
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//
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//===----------------------------------------------------------------------===//
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#include "FuzzerInternal.h"
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namespace fuzzer {
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TracePC TPC;
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void TracePC::HandleTrace(uint8_t *guard, uintptr_t PC) {
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*guard = 0xff;
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TotalCoverage++;
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}
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void TracePC::HandleInit(uint8_t *start, uint8_t *stop) {
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Printf("INFO: guards: [%p,%p)\n", start, stop);
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}
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size_t TracePC::GetTotalCoverage() { return TotalCoverage; }
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} // namespace fuzzer
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extern "C" {
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__attribute__((visibility("default")))
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void __sanitizer_cov_trace_pc_guard(uint8_t *guard) {
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uintptr_t PC = (uintptr_t)__builtin_return_address(0);
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fuzzer::TPC.HandleTrace(guard, PC);
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}
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__attribute__((visibility("default")))
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void __sanitizer_cov_trace_pc_guard_init(uint8_t *start, uint8_t *stop) {
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}
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}
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