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 
BuryPointer(const void * Ptr)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