libsanitizer/ubsan/ubsan_handlers_cxx.h

   1 //===-- ubsan_handlers_cxx.h ------------------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Entry points to the runtime library for Clang's undefined behavior sanitizer,
   9 // for C++-specific checks. This code is not linked into C binaries.
  10 //
  11 //===----------------------------------------------------------------------===//
  12 #ifndef UBSAN_HANDLERS_CXX_H
  13 #define UBSAN_HANDLERS_CXX_H
  14
  15 #include "ubsan_value.h"
  16
  17 namespace __ubsan {
  18
  19 struct DynamicTypeCacheMissData {
  20   SourceLocation Loc;
  21   const TypeDescriptor &Type;
  22   void *TypeInfo;
  23   unsigned char TypeCheckKind;
  24 };
  25
  26 struct CFIBadTypeData {
  27   SourceLocation Loc;
  28   const TypeDescriptor &Type;
  29   unsigned char TypeCheckKind;
  30 };
  31
  32 /// \brief Handle a runtime type check failure, caused by an incorrect vptr.
  33 /// When this handler is called, all we know is that the type was not in the
  34 /// cache; this does not necessarily imply the existence of a bug.
  35 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
  36 void __ubsan_handle_dynamic_type_cache_miss(
  37   DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash);
  38 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
  39 void __ubsan_handle_dynamic_type_cache_miss_abort(
  40   DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash);
  41
  42 /// \brief Handle a control flow integrity check failure by printing a
  43 /// diagnostic.
  44 extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
  45 __ubsan_handle_cfi_bad_type(CFIBadTypeData *Data, ValueHandle Vtable);
  46 extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
  47 __ubsan_handle_cfi_bad_type_abort(CFIBadTypeData *Data, ValueHandle Vtable);
  48 }
  49
  50 #endif // UBSAN_HANDLERS_H