contrib/compiler-rt/lib/ubsan/ubsan_type_hash.cc

   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
  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