forked from OSchip/llvm-project
76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
//===-- ubsan_handlers_cxx.cc ---------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Error logging entry points for the UBSan runtime, which are only used for C++
|
|
// compilations. This file is permitted to use language features which require
|
|
// linking against a C++ ABI library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ubsan_handlers_cxx.h"
|
|
#include "ubsan_diag.h"
|
|
#include "ubsan_type_hash.h"
|
|
|
|
#include "sanitizer_common/sanitizer_common.h"
|
|
|
|
using namespace __sanitizer;
|
|
using namespace __ubsan;
|
|
|
|
namespace __ubsan {
|
|
extern const char *TypeCheckKinds[];
|
|
}
|
|
|
|
static void HandleDynamicTypeCacheMiss(
|
|
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash,
|
|
bool Abort) {
|
|
if (checkDynamicType((void*)Pointer, Data->TypeInfo, Hash))
|
|
// Just a cache miss. The type matches after all.
|
|
return;
|
|
|
|
SourceLocation Loc = Data->Loc.acquire();
|
|
if (Loc.isDisabled())
|
|
return;
|
|
|
|
Diag(Loc, DL_Error,
|
|
"%0 address %1 which does not point to an object of type %2")
|
|
<< TypeCheckKinds[Data->TypeCheckKind] << (void*)Pointer << Data->Type;
|
|
|
|
// If possible, say what type it actually points to.
|
|
// FIXME: Demangle the type names.
|
|
DynamicTypeInfo DTI = getDynamicTypeInfo((void*)Pointer);
|
|
if (!DTI.isValid())
|
|
Diag(Pointer, DL_Note, "object has invalid vptr")
|
|
<< MangledName(DTI.getMostDerivedTypeName())
|
|
<< Range(Pointer, Pointer + sizeof(uptr), "invalid vptr");
|
|
else if (!DTI.getOffset())
|
|
Diag(Pointer, DL_Note, "object is of type %0")
|
|
<< MangledName(DTI.getMostDerivedTypeName())
|
|
<< Range(Pointer, Pointer + sizeof(uptr), "vptr for %0");
|
|
else
|
|
// FIXME: Find the type at the specified offset, and include that
|
|
// in the note.
|
|
Diag(Pointer - DTI.getOffset(), DL_Note,
|
|
"object is base class subobject at offset %0 within object of type %1")
|
|
<< DTI.getOffset() << MangledName(DTI.getMostDerivedTypeName())
|
|
<< MangledName(DTI.getSubobjectTypeName())
|
|
<< Range(Pointer, Pointer + sizeof(uptr), "vptr for %2 base class of %1");
|
|
|
|
if (Abort)
|
|
Die();
|
|
}
|
|
|
|
void __ubsan::__ubsan_handle_dynamic_type_cache_miss(
|
|
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
|
|
HandleDynamicTypeCacheMiss(Data, Pointer, Hash, false);
|
|
}
|
|
void __ubsan::__ubsan_handle_dynamic_type_cache_miss_abort(
|
|
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
|
|
HandleDynamicTypeCacheMiss(Data, Pointer, Hash, true);
|
|
}
|