libsanitizer/ubsan/ubsan_type_hash.cc

   1 //===-- ubsan_type_hash.cc ------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Implementation of a hash table for fast checking of inheritance
   9 // relationships. This file is only linked into C++ compilations, and is
  10 // permitted to use language features which require a C++ ABI library.
  11 //
  12 // Most of the implementation lives in an ABI-specific source file
  13 // (ubsan_type_hash_{itanium,win}.cc).
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #include "ubsan_platform.h"
  18 #if CAN_SANITIZE_UB
  19 #include "ubsan_type_hash.h"
  20
  21 #include "sanitizer_common/sanitizer_common.h"
  22
  23 /// A cache of recently-checked hashes. Mini hash table with "random" evictions.
  24 __ubsan::HashValue
  25 __ubsan::__ubsan_vptr_type_cache[__ubsan::VptrTypeCacheSize];
  26
  27 __ubsan::DynamicTypeInfo __ubsan::getDynamicTypeInfoFromObject(void *Object) {
  28   void *VtablePtr = *reinterpret_cast<void **>(Object);
  29   return getDynamicTypeInfoFromVtable(VtablePtr);
  30 }
  31
  32 #endif  // CAN_SANITIZE_UB