1 //===-- ubsan_type_hash.cc ------------------------------------------------===// 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 // Implementation of a hash table for fast checking of inheritance 11 // relationships. This file is only linked into C++ compilations, and is 12 // permitted to use language features which require a C++ ABI library. 13 // 14 // Most of the implementation lives in an ABI-specific source file 15 // (ubsan_type_hash_{itanium,win}.cc). 16 // 17 //===----------------------------------------------------------------------===// 18 19 #include "ubsan_platform.h" 20 #if CAN_SANITIZE_UB 21 #include "ubsan_type_hash.h" 22 23 #include "sanitizer_common/sanitizer_common.h" 24 25 /// A cache of recently-checked hashes. Mini hash table with "random" evictions. 26 __ubsan::HashValue 27 __ubsan::__ubsan_vptr_type_cache[__ubsan::VptrTypeCacheSize]; 28 getDynamicTypeInfoFromObject(void * Object)29__ubsan::DynamicTypeInfo __ubsan::getDynamicTypeInfoFromObject(void *Object) { 30 void *VtablePtr = *reinterpret_cast<void **>(Object); 31 return getDynamicTypeInfoFromVtable(VtablePtr); 32 } 33 34 #endif // CAN_SANITIZE_UB 35