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