mirror of https://github.com/facebook/rocksdb.git
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#ifndef FALLTHROUGH_INTENDED
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#if defined(__clang__)
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#define FALLTHROUGH_INTENDED [[clang::fallthrough]]
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#elif defined(__GNUC__) && __GNUC__ >= 7
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#define FALLTHROUGH_INTENDED [[gnu::fallthrough]]
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#else
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#define FALLTHROUGH_INTENDED do {} while (0)
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#endif
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#endif
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#if defined(__clang__)
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#if defined(__has_feature)
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#if __has_feature(address_sanitizer)
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#define MUST_FREE_HEAP_ALLOCATIONS 1
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#endif // __has_feature(address_sanitizer)
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#endif // defined(__has_feature)
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#else // __clang__
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#ifdef __SANITIZE_ADDRESS__
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#define MUST_FREE_HEAP_ALLOCATIONS 1
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#endif // __SANITIZE_ADDRESS__
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#endif // __clang__
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// Coding guidelines say to avoid static objects with non-trivial destructors,
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// because it's easy to cause trouble (UB) in static destruction. This
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// macro makes it easier to define static objects that are normally never
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// destructed, except are destructed when running under ASAN. This should
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// avoid unexpected, unnecessary destruction behavior in production.
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// Note that constructor arguments can be provided as in
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// STATIC_AVOID_DESTRUCTION(Foo, foo)(arg1, arg2);
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#ifdef MUST_FREE_HEAP_ALLOCATIONS
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#define STATIC_AVOID_DESTRUCTION(Type, name) static Type name
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#else
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#define STATIC_AVOID_DESTRUCTION(Type, name) static Type& name = *new Type
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#endif
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