1 //===-- ubsan_handlers_cxx.cc ---------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Error logging entry points for the UBSan runtime, which are only used for C++
11 // compilations. This file is permitted to use language features which require
12 // linking against a C++ ABI library.
14 //===----------------------------------------------------------------------===//
16 #include "ubsan_handlers_cxx.h"
17 #include "ubsan_diag.h"
18 #include "ubsan_type_hash.h"
20 #include "sanitizer_common/sanitizer_common.h"
22 using namespace __sanitizer;
23 using namespace __ubsan;
26 extern const char *TypeCheckKinds[];
29 static void HandleDynamicTypeCacheMiss(
30 DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash,
32 if (checkDynamicType((void*)Pointer, Data->TypeInfo, Hash))
33 // Just a cache miss. The type matches after all.
36 SourceLocation Loc = Data->Loc.acquire();
41 "%0 address %1 which does not point to an object of type %2")
42 << TypeCheckKinds[Data->TypeCheckKind] << (void*)Pointer << Data->Type;
44 // If possible, say what type it actually points to.
45 // FIXME: Demangle the type names.
46 DynamicTypeInfo DTI = getDynamicTypeInfo((void*)Pointer);
48 Diag(Pointer, DL_Note, "object has invalid vptr")
49 << MangledName(DTI.getMostDerivedTypeName())
50 << Range(Pointer, Pointer + sizeof(uptr), "invalid vptr");
51 else if (!DTI.getOffset())
52 Diag(Pointer, DL_Note, "object is of type %0")
53 << MangledName(DTI.getMostDerivedTypeName())
54 << Range(Pointer, Pointer + sizeof(uptr), "vptr for %0");
56 // FIXME: Find the type at the specified offset, and include that
58 Diag(Pointer - DTI.getOffset(), DL_Note,
59 "object is base class subobject at offset %0 within object of type %1")
60 << DTI.getOffset() << MangledName(DTI.getMostDerivedTypeName())
61 << MangledName(DTI.getSubobjectTypeName())
62 << Range(Pointer, Pointer + sizeof(uptr), "vptr for %2 base class of %1");
68 void __ubsan::__ubsan_handle_dynamic_type_cache_miss(
69 DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
70 HandleDynamicTypeCacheMiss(Data, Pointer, Hash, false);
72 void __ubsan::__ubsan_handle_dynamic_type_cache_miss_abort(
73 DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
74 HandleDynamicTypeCacheMiss(Data, Pointer, Hash, true);