31 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/Support/BuryPointer.h"10#include "llvm/Support/Compiler.h"11#include <atomic>12 13namespace llvm {14 15void BuryPointer(const void *Ptr) {16 // This function may be called only a small fixed amount of times per each17 // invocation, otherwise we do actually have a leak which we want to report.18 // If this function is called more than kGraveYardMaxSize times, the pointers19 // will not be properly buried and a leak detector will report a leak, which20 // 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 llvm31