1 //===- BuryPointer.cpp - Memory Manipulation/Leak ---------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/BuryPointer.h"
11 #include "llvm/Support/Compiler.h"
12 #include <atomic>
13 
14 namespace llvm {
15 
BuryPointer(const void * Ptr)16 void BuryPointer(const void *Ptr) {
17   // This function may be called only a small fixed amount of times per each
18   // invocation, otherwise we do actually have a leak which we want to report.
19   // If this function is called more than kGraveYardMaxSize times, the pointers
20   // will not be properly buried and a leak detector will report a leak, which
21   // is what we want in such case.
22   static const size_t kGraveYardMaxSize = 16;
23   LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
24   static std::atomic<unsigned> GraveYardSize;
25   unsigned Idx = GraveYardSize++;
26   if (Idx >= kGraveYardMaxSize)
27     return;
28   GraveYard[Idx] = Ptr;
29 }
30 
31 }
32