| 1 | //===- BuryPointer.cpp - Memory Manipulation/Leak ---------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "llvm/Support/BuryPointer.h" |
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| 10 | #include "llvm/Support/Compiler.h" |
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| 11 | #include <atomic> |
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| 12 | |
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| 13 | namespace llvm { |
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| 14 | |
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| 15 | void BuryPointer(const void *Ptr) { |
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| 16 | // This function may be called only a small fixed amount of times per each |
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| 17 | // invocation, otherwise we do actually have a leak which we want to report. |
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| 18 | // If this function is called more than kGraveYardMaxSize times, the pointers |
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| 19 | // will not be properly buried and a leak detector will report a leak, which |
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| 20 | // is what we want in such case. |
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| 21 | static const size_t kGraveYardMaxSize = 16; |
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| 22 | LLVM_ATTRIBUTE_USED static const void *GraveYard[kGraveYardMaxSize]; |
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| 23 | static std::atomic<unsigned> GraveYardSize; |
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| 24 | unsigned Idx = GraveYardSize++; |
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| 25 | if (Idx >= kGraveYardMaxSize) |
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| 26 | return; |
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| 27 | GraveYard[Idx] = Ptr; |
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| 28 | } |
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| 29 | |
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| 30 | } // namespace llvm |
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| 31 | |
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