[Webkit-unassigned] [Bug 226557] New: -Warray-bounds warning in Packed.h

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226557

            Bug ID: 226557
           Summary: -Warray-bounds warning in Packed.h
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Minor
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org

Splitting this from bug #226193. We have a -Warray-bounds warning in Packed.h. Fortunately it's only triggered when compiling WebSocket.cpp, which is why it's not a more serious warning spam:

[506/1614] Building CXX object Source/WebCore/CMakeFiles/...edSources/unified-sources/UnifiedSource-4babe430-49.cpp.o
In file included from WTF/Headers/wtf/text/StringImpl.h:32,
                 from WTF/Headers/wtf/text/WTFString.h:31,
                 from ../../Source/WebCore/dom/Exception.h:30,
                 from ../../Source/WebCore/dom/ExceptionOr.h:29,
                 from ../../Source/WebCore/dom/Event.h:29,
                 from ../../Source/WebCore/Modules/websockets/CloseEvent.h:33,
                 from ../../Source/WebCore/Modules/websockets/CloseEvent.cpp:27,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-4babe430-49.cpp:2:
In member function ‘T* WTF::PackedAlignedPtr<T, <anonymous> >::get() const [with T = JSC::SharedArrayBufferContents; long unsigned int passedAlignment = 1]’,
    inlined from ‘WTF::PackedAlignedPtr<T, <anonymous> >::operator bool() const [with T = JSC::SharedArrayBufferContents; long unsigned int passedAlignment = 1]’ at WTF/Headers/wtf/Packed.h:188:48,
    inlined from ‘WTF::RefPtr<T, <template-parameter-1-2>, <template-parameter-1-3> >::operator WTF::RefPtr<T, <template-parameter-1-2>, <template-parameter-1-3> >::UnspecifiedBoolType() const [with T = JSC::SharedArrayBufferContents; _PtrTraits = WTF::PackedPtrTraits<JSC::SharedArrayBufferContents>; _RefDerefTraits = WTF::DefaultRefDerefTraits<JSC::SharedArrayBufferContents>]’ at WTF/Headers/wtf/RefPtr.h:91:57,
    inlined from ‘bool JSC::ArrayBufferContents::isShared() const’ at JavaScriptCore/PrivateHeaders/JavaScriptCore/ArrayBuffer.h:84:36,
    inlined from ‘bool JSC::ArrayBuffer::isShared() const’ at JavaScriptCore/PrivateHeaders/JavaScriptCore/ArrayBuffer.h:202:31,
    inlined from ‘WTF::RefPtr<JSC::ArrayBuffer> JSC::ArrayBufferView::unsharedBuffer() const’ at JavaScriptCore/PrivateHeaders/JavaScriptCore/ArrayBufferView.h:60:9,
    inlined from ‘WebCore::ExceptionOr<void> WebCore::WebSocket::send(JSC::ArrayBufferView&)’ at ../../Source/WebCore/Modules/websockets/WebSocket.cpp:389:52:
WTF/Headers/wtf/Packed.h:140:15: warning: ‘void* memcpy(void*, const void*, size_t)’ offset [0, 5] is out of the bounds [0, 0] [-Warray-bounds]
  140 |         memcpy(&value, m_storage.data(), storageSize);
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20210602/dfc8c33e/attachment-0001.htm>