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
13namespace llvm {
14
15void 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