| //===- BuryPointer.cpp - Memory Manipulation/Leak ---------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/BuryPointer.h" |
| #include "llvm/Support/Compiler.h" |
| #include <atomic> |
| |
| namespace llvm { |
| |
| void BuryPointer(const void *Ptr) { |
| // This function may be called only a small fixed amount of times per each |
| // invocation, otherwise we do actually have a leak which we want to report. |
| // If this function is called more than kGraveYardMaxSize times, the pointers |
| // will not be properly buried and a leak detector will report a leak, which |
| // is what we want in such case. |
| static const size_t kGraveYardMaxSize = 16; |
| LLVM_ATTRIBUTE_USED static const void *GraveYard[kGraveYardMaxSize]; |
| static std::atomic<unsigned> GraveYardSize; |
| unsigned Idx = GraveYardSize++; |
| if (Idx >= kGraveYardMaxSize) |
| return; |
| GraveYard[Idx] = Ptr; |
| } |
| |
| } // namespace llvm |