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cfd9e47225
Specifically planning to use this in llvm-symbolizer to remove the cost of cleanup there. llvm-svn: 347140
32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
//===- BuryPointer.cpp - Memory Manipulation/Leak ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/BuryPointer.h"
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#include "llvm/Support/Compiler.h"
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#include <atomic>
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namespace llvm {
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void BuryPointer(const void *Ptr) {
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// This function may be called only a small fixed amount of times per each
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// invocation, otherwise we do actually have a leak which we want to report.
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// If this function is called more than kGraveYardMaxSize times, the pointers
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// will not be properly buried and a leak detector will report a leak, which
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// is what we want in such case.
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static const size_t kGraveYardMaxSize = 16;
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LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
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static std::atomic<unsigned> GraveYardSize;
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unsigned Idx = GraveYardSize++;
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if (Idx >= kGraveYardMaxSize)
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return;
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GraveYard[Idx] = Ptr;
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}
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}
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