1 //===- BuryPointer.cpp - Memory Manipulation/Leak ---------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/Support/BuryPointer.h" 10 #include "llvm/Support/Compiler.h" 11 #include <atomic> 12 13 namespace llvm { 14 15 void BuryPointer(const void *Ptr) { 16 // This function may be called only a small fixed amount of times per each 17 // invocation, otherwise we do actually have a leak which we want to report. 18 // If this function is called more than kGraveYardMaxSize times, the pointers 19 // will not be properly buried and a leak detector will report a leak, which 20 // is what we want in such case. 21 static const size_t kGraveYardMaxSize = 16; 22 LLVM_ATTRIBUTE_USED static const void *GraveYard[kGraveYardMaxSize]; 23 static std::atomic<unsigned> GraveYardSize; 24 unsigned Idx = GraveYardSize++; 25 if (Idx >= kGraveYardMaxSize) 26 return; 27 GraveYard[Idx] = Ptr; 28 } 29 30 } // namespace llvm 31