tools/ubsan/vptr_ignorelist.txt

#############################################################################
# UBSan vptr ignorelist.
# Function and type based ignorelisting use a mangled name, and it is especially
# tricky to represent C++ types. For now, any possible changes by name manglings
# are simply represented as wildcard expressions of regexp, and thus it might be
# over-ignorelisted.

#############################################################################
# Identical layouts.
# If base and derived classes have identifical memory layouts (i.e., the same
# object size) and both have no virtual functions, we ignorelist them as there
# would be not much security implications.

fun:*LifecycleNotifier*addObserver*
fun:*LifecycleNotifier*removeObserver*
fun:*toWebInputElement*
type:*base*MessageLoopForIO*
type:*BlockRefType*
type:*SkAutoTUnref*
type:*WDResult*
type:*ExecutionContext*
type:*WebInputElement*
type:*WebFormControlElement*

# Avoid identical layout cases for 86 different classes in InspectorTypeBuilder,
# all of which are guarded using COMPILER_ASSERT on the object size. Two more
# types are also ignorelisted due to the template class (JSONArray <-> Array<T>).

src:*InspectorTypeBuilder.h*
type:*TypeBuilder*
type:*JSONArray*

#############################################################################
# Base class's constructor accesses a derived class's member.

fun:*DoublyLinkedListNode*
type:*content*WebUIExtensionData*

# RenderFrameObserverTracker<T>::RenderFrameObserverTracker()
fun:*content*RenderFrameObserverTracker*RenderFrame*

# RenderViewObserverTracker<T>::RenderViewObserverTracker()
fun:*content*RenderViewObserverTracker*RenderView*

#############################################################################
# Base class's destructor accesses a derived class.

fun:*DatabaseContext*contextDestroyed*

# FIXME: Cannot handle template function LifecycleObserver<>::SetContext,
# so exclude source file for now.
src:*lifecycle_observer.h*

#############################################################################
# static_cast into itself in the constructor.

fun:*RefCountedGarbageCollected*makeKeepAlive*
fun:*ThreadSafeRefCountedGarbageCollected*makeKeepAlive*

#############################################################################
# Accessing data in destructors where the class has virtual inheritances.

type:*content*RenderWidgetHost*

# Match mangled name for X::~X().
fun:*content*RenderThreadImplD*
fun:*content*RenderViewHostImplD*
fun:*content*UtilityThreadImplD*

#############################################################################
# Using raw pointer values.
#
# A raw pointer value (16) is used to infer the field offset by
# GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET.

src:*/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
src:*/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_message.cc
src:*/third_party/protobuf/src/google/protobuf/descriptor.pb.cc

#############################################################################
# Avoid link errors.
# Ubsan vptr needs typeinfo on the target class, but it looks like typeinfo is
# not avaiable if the class is not exported.  For now, simply ignorelisted to
# avoid link errors; e.g., undefined reference to 'typeinfo for [CLASS_NAME]'.

# obj/ppapi/libppapi_proxy.a(obj/ppapi/proxy/ppapi_proxy.proxy_channel.o):../../ppapi/proxy/proxy_channel.cc:__unnamed_53: error: undefined reference to 'typeinfo for IPC::TestSink'
src:*/ppapi/proxy/proxy_channel.cc

# obj/chrome/libbrowser.a(obj/chrome/browser/net/browser.predictor.o):../../chrome/browser/net/predictor.cc:__unnamed_577: error: undefined reference to 'typeinfo for ProxyAdvisor'
src:*/chrome/browser/net/predictor.cc

# obj/third_party/libwebm/libwebm.a(obj/third_party/libwebm/source/libwebm.mkvmuxer.o)(.data.rel..L__unnamed_2+0x18): error: undefined reference to 'typeinfo for mkvparser::IMkvReader'
src:*/third_party/libwebm/source/mkvmuxer.cpp

#############################################################################
# LLVM is not UBSan vptr clean.
src:*third_party/swiftshader/third_party/LLVM*

#############################################################################
# UBSan yields false positives in SwiftShader's libEGL when objects created in
# libGLESv2 from classes derived from libEGL base classes are used within
# libEGL. UBSan wrongly detects that the libGLESv2 classes are not derived from
# libEGL classes because libEGL doesn't know about libGLESv2 classes.
# See crbug.com/722349, crbug.com/736624.
type:*egl*Context*
type:*egl*Surface*
type:*gl*Surface*
type:*gl*Object*
type:*sw*FrameBuffer*

#############################################################################
# UBSan seems to be emit false positives when virtual base classes are
# involved, see e.g. crbug.com/448102.

type:*v8*internal*OFStream*

#############################################################################
# UBsan is unable to handle static_cast<A*>(nullptr) and crashes on SIGSEGV.
#

# static_cast<StartPageService*> in StartPageServiceFactory::GetForProfile.
type:*StartPageService*

# Remove once function attribute level ignorelisting is implemented.
# See crbug.com/476063.
fun:*forbidGCDuringConstruction*