| 1 | //===-- ubsan_type_hash.cpp -----------------------------------------------===// |
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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 | // Implementation of a hash table for fast checking of inheritance |
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| 10 | // relationships. This file is only linked into C++ compilations, and is |
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| 11 | // permitted to use language features which require a C++ ABI library. |
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| 12 | // |
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| 13 | // Most of the implementation lives in an ABI-specific source file |
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| 14 | // (ubsan_type_hash_{itanium,win}.cpp). |
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| 15 | // |
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| 16 | //===----------------------------------------------------------------------===// |
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| 17 | |
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| 18 | #include "ubsan_platform.h" |
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| 19 | #if CAN_SANITIZE_UB |
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| 20 | #include "ubsan_type_hash.h" |
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| 21 | |
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| 22 | #include "sanitizer_common/sanitizer_common.h" |
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| 23 | |
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| 24 | /// A cache of recently-checked hashes. Mini hash table with "random" evictions. |
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| 25 | __ubsan::HashValue |
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| 26 | __ubsan::__ubsan_vptr_type_cache[__ubsan::VptrTypeCacheSize]; |
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| 27 | |
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| 28 | __ubsan::DynamicTypeInfo __ubsan::getDynamicTypeInfoFromObject(void *Object) { |
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| 29 | void *VtablePtr = *reinterpret_cast<void **>(Object); |
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| 30 | return getDynamicTypeInfoFromVtable(Vtable: VtablePtr); |
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| 31 | } |
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| 32 | |
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| 33 | #endif // CAN_SANITIZE_UB |
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| 34 | |
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