• Stephan Bergmann's avatar
    Avoid truncation of ±1E20 to long · ee6dd4d3
    Stephan Bergmann yazdı
    With -fsanitize=float-cast-overflow, opening doc/abi5309-1.doc as obtained by
    bin/get-bugzilla-attachments-by-mimetype (i.e., the attachment at
    <https://bugzilla.abisource.com/show_bug.cgi?id=5309#c3>) fails with
    
    > include/tools/helpers.hxx:76:79: runtime error: 1e+20 is outside the range of representable values of type 'long'
    >  #0 in FRound(double) at include/tools/helpers.hxx:76:79 (instdir/program/libtllo.so +0x3c13dd)
    >  #1 in ImplPolygon::ImplPolygon(basegfx::B2DPolygon const&) at tools/source/generic/poly.cxx:474:30 (instdir/program/libtllo.so +0x40f35f)
    >  #2 in tools::Polygon::Polygon(basegfx::B2DPolygon const&) at tools/source/generic/poly.cxx:1849:72 (instdir/program/libtllo.so +0x42c9ff)
    >  #3 in ImplPolyPolygon::ImplPolyPolygon(basegfx::B2DPolyPolygon const&) at tools/source/generic/poly2.cxx:482:28 (instdir/program/libtllo.so +0x45561e)
    >  #4 in tools::PolyPolygon::PolyPolygon(basegfx::B2DPolyPolygon const&) at tools/source/generic/poly2.cxx:463:25 (instdir/program/libtllo.so +0x45512d)
    >  #5 in emfio::MtfTools::DrawPolygon(tools::Polygon, bool) at emfio/source/reader/mtftools.cxx:1287:17 (instdir/program/../program/libemfiolo.so +0x1828d3)
    >  #6 in emfio::WmfReader::ReadRecordParams(unsigned short) at emfio/source/reader/wmfreader.cxx:367:21 (instdir/program/../program/libemfiolo.so +0x1cffde)
    >  #7 in emfio::WmfReader::ReadWMF() at emfio/source/reader/wmfreader.cxx:1425:29 (instdir/program/../program/libemfiolo.so +0x1f7567)
    >  #8 in emfio::emfreader::XEmfParser::getDecomposition(com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&, rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at emfio/source/emfuno/xemfparser.cxx:152:108 (instdir/program/../program/libemfiolo.so +0x13795a)
    >  #9 in non-virtual thunk to emfio::emfreader::XEmfParser::getDecomposition(com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&, rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at emfio/source/emfuno/xemfparser.cxx (instdir/program/../program/libemfiolo.so +0x138735)
    >  #10 in VectorGraphicData::ensureSequenceAndRange() at vcl/source/gdi/vectorgraphicdata.cxx:172:137 (instdir/program/libvcllo.so +0x86bdadf)
    >  #11 in VectorGraphicData::ensureReplacement() at vcl/source/gdi/vectorgraphicdata.cxx:138:5 (instdir/program/libvcllo.so +0x86bcb94)
    >  #12 in VectorGraphicData::getReplacement() const at vcl/source/gdi/vectorgraphicdata.cxx:286:45 (instdir/program/libvcllo.so +0x86c0a04)
    >  #13 in ImpGraphic::ImplSetPrefSize(Size const&) at vcl/source/gdi/impgraph.cxx:956:45 (instdir/program/libvcllo.so +0x7d05433)
    >  #14 in Graphic::SetPrefSize(Size const&) at vcl/source/gdi/graph.cxx:388:19 (instdir/program/libvcllo.so +0x7ca7e26)
    >  #15 in SvxMSDffManager::GetBLIPDirect(SvStream&, Graphic&, tools::Rectangle*) at filter/source/msfilter/msdffimp.cxx:6616:26 (instdir/program/../program/libmsfilterlo.so +0x9617bc)
    >  #16 in SvxMSDffManager::GetBLIP(unsigned long, Graphic&, tools::Rectangle*) at filter/source/msfilter/msdffimp.cxx:6453:23 (instdir/program/../program/libmsfilterlo.so +0x95f368)
    >  #17 in SvxMSDffManager::ImportGraphic(SvStream&, SfxItemSet&, DffObjData const&) at filter/source/msfilter/msdffimp.cxx:3821:24 (instdir/program/../program/libmsfilterlo.so +0x990678)
    >  #18 in SvxMSDffManager::ImportShape(DffRecordHeader const&, SvStream&, SvxMSDffClientData&, tools::Rectangle&, tools::Rectangle const&, int, int*) at filter/source/msfilter/msdffimp.cxx:4368:28 (instdir/program/../program/libmsfilterlo.so +0x9a221a)
    >  #19 in SvxMSDffManager::ImportObj(SvStream&, SvxMSDffClientData&, tools::Rectangle&, tools::Rectangle const&, int, int*) at filter/source/msfilter/msdffimp.cxx:4073:16 (instdir/program/../program/libmsfilterlo.so +0x9972d8)
    >  #20 in SvxMSDffManager::GetShape(unsigned long, SdrObject*&, SvxMSDffImportData&) at filter/source/msfilter/msdffimp.cxx:6377:23 (instdir/program/../program/libmsfilterlo.so +0x9dde0c)
    >  #21 in SwWW8ImplReader::Read_GrafLayer(long) at sw/source/filter/ww8/ww8graf.cxx:2567:34 (instdir/program/../program/libmswordlo.so +0x2c51a1f)
    >  #22 in SwWW8ImplReader::ReadChar(long, long) at sw/source/filter/ww8/ww8par.cxx:3697:17 (instdir/program/../program/libmswordlo.so +0x2db3a07)
    >  #23 in SwWW8ImplReader::ReadChars(int&, int, long, long) at sw/source/filter/ww8/ww8par.cxx:3484:27 (instdir/program/../program/libmswordlo.so +0x2dafba2)
    >  #24 in SwWW8ImplReader::ReadText(int, int, ManTypes) at sw/source/filter/ww8/ww8par.cxx:4045:22 (instdir/program/../program/libmswordlo.so +0x2d85c3e)
    >  #25 in SwWW8ImplReader::CoreLoad(WW8Glossary const*) at sw/source/filter/ww8/ww8par.cxx:5227:9 (instdir/program/../program/libmswordlo.so +0x2de3314)
    >  #26 in SwWW8ImplReader::LoadThroughDecryption(WW8Glossary*) at sw/source/filter/ww8/ww8par.cxx:5892:19 (instdir/program/../program/libmswordlo.so +0x2df31ad)
    >  #27 in SwWW8ImplReader::LoadDoc(WW8Glossary*) at sw/source/filter/ww8/ww8par.cxx:6196:19 (instdir/program/../program/libmswordlo.so +0x2dfe1ed)
    >  #28 in WW8Reader::Read(SwDoc&, rtl::OUString const&, SwPaM&, rtl::OUString const&) at sw/source/filter/ww8/ww8par.cxx:6347:26 (instdir/program/../program/libmswordlo.so +0x2e0301a)
    >  #29 in SwReader::Read(Reader const&) at sw/source/filter/basflt/shellio.cxx:188:22 (instdir/program/../program/libswlo.so +0x1041d2be)
    >  #30 in SwDocShell::ConvertFrom(SfxMedium&) at sw/source/uibase/app/docsh.cxx:261:26 (instdir/program/../program/libswlo.so +0x10fc4d98)
    >  #31 in SfxObjectShell::DoLoad(SfxMedium*) at sfx2/source/doc/objstor.cxx:768:23 (instdir/program/libsfxlo.so +0x49d934a)
    [...]
    
    To represent "negative" clip regions, basegfx/source/tools/b2dclipstate.cxx uses
    an ugly hack of subtracting the region from a ±1E20 bounding box.  This document
    uses such a negative clip region with a 4504x633@(11301,38) rectangular hole.
    (Though I don't know whether that's the real intention, or caused by LO
    misparsing the input file format.)
    
    So to avoid converting the ±1E20 bounding box from double to long, do the
    intersection here with basegfx double values, and only convert the result to
    tools long values.  (There appears to be no implemenation of intersection with
    a polypolygon for B2DPolyPolyon, just B2DClipState::intersectPolyPolygon.)  (In
    principle there could be loss of precision when aPolyPoly is converted to a
    B2DPolyPolygon now, but that's unlikely with a typical IEEE 754 double with
    52 bit mantissa.)
    
    Change-Id: I82a9941b43d90153d63612147b2ca33fbca5f179
    Reviewed-on: https://gerrit.libreoffice.org/73386
    Tested-by: Jenkins
    Reviewed-by: 's avatarThorsten Behrens <Thorsten.Behrens@CIB.de>
    ee6dd4d3
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