blob: b3cda32a98f3568c7e13dd0c1be144cf6e8f1f0b [file] [log] [blame]
//===-- ---------------------------------------------===//
// 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_platform.h"
#include "ubsan_handlers_cxx.h"
#include "ubsan_diag.h"
#include "ubsan_type_hash.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_suppressions.h"
using namespace __sanitizer;
using namespace __ubsan;
namespace __ubsan {
extern const char *TypeCheckKinds[];
static void HandleDynamicTypeCacheMiss(
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash,
ReportOptions Opts) {
if (checkDynamicType((void*)Pointer, Data->TypeInfo, Hash))
// Just a cache miss. The type matches after all.
// Check if error report should be suppressed.
DynamicTypeInfo DTI = getDynamicTypeInfo((void*)Pointer);
if (DTI.isValid() && IsVptrCheckSuppressed(DTI.getMostDerivedTypeName()))
SourceLocation Loc = Data->Loc.acquire();
if (Loc.isDisabled())
ScopedReport R(Opts, Loc);
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.
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");
// 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");
void __ubsan::__ubsan_handle_dynamic_type_cache_miss(
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
HandleDynamicTypeCacheMiss(Data, Pointer, Hash, Opts);
void __ubsan::__ubsan_handle_dynamic_type_cache_miss_abort(
DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash) {
HandleDynamicTypeCacheMiss(Data, Pointer, Hash, Opts);