96005 2012-09-06 12:04:08 -0700 Source/WebCore/platform/Length.cpp fails to build on PPC 2014-07-30 12:01:56 -0700 1 1 1 Unclassified WebKit Platform 528+ (Nightly build) Unspecified Unspecified RESOLVED WONTFIX https://trac.macports.org/ticket/35989 P2 Normal --- 126492 0 jeremyhu webkit-unassigned simon.fraser oldest_to_newest 713546 0 jeremyhu 2012-09-06 12:04:08 -0700 This was first discovered in MacPorts when building webkit-gtk-1.8.3: https://trac.macports.org/ticket/35989 The source builds fine for i386 and x86_64 but fails to build for ppc. This compile-time assert fails: COMPILE_ASSERT(sizeof(Length) == sizeof(SameSizeAsLength), length_should_stay_small); libtool: compile: /usr/bin/g++-4.2 -DHAVE_CONFIG_H -I. -DBUILDING_WEBKIT -Wall -W -Wcast-align -Wchar-subscripts -Wreturn-type -Wformat -Wformat-security -Wno-format-y2k -Wundef -Wmissing-format-attribute -Wpointer-arith -Wwrite-strings -Wno-unused-parameter -Wno-parentheses -fno-exceptions -DENABLE_GLIB_SUPPORT=1 -DBUILDING_CAIRO__=1 -DBUILDING_GTK__=1 -DWTF_CHANGES -DXP_UNIX -DWTF_USE_ICU_UNICODE=1 -DWTF_USE_GSTREAMER=1 -DGTK_API_VERSION_2=1 -DNDEBUG -I./Source/ThirdParty/ANGLE/src -I./Source/ThirdParty/ANGLE/include -I./Source/ThirdParty/ANGLE/include/GLSLANG -I./Source/WebCore -I./Source/WebCore/accessibility -I./Source/WebCore/bindings -I./Source/WebCore/bindings/generic -I./Source/WebCore/bindings/js -I./Source/WebCore/bindings/js/specialization -I./Source/WebCore/bridge -I./Source/WebCore/bridge/c -I./Source/WebCore/bridge/jni/jsc -I./Source/WebCore/bridge/jsc -I./Source/WebCore/css -I./Source/WebCore/dom -I./Source/WebCore/dom/default -I./Source/WebCore/editing -I./Source/WebCore/fileapi -I./Source/WebCore/history -I./Source/WebCore/html -I./Source/WebCore/html/canvas -I./Source/WebCore/html/parser -I./Source/WebCore/html/shadow -I./Source/WebCore/html/track -I./Source/WebCore/inspector -I./Source/WebCore/loader -I./Source/WebCore/loader/appcache -I./Source/WebCore/loader/archive -I./Source/WebCore/loader/cache -I./Source/WebCore/loader/icon -I./Source/WebCore/mathml -I./Source/WebCore/mediastream -I./Source/WebCore/notifications -I./Source/WebCore/page -I./Source/WebCore/page/animation -I./Source/WebCore/page/scrolling -I./Source/WebCore/platform -I./Source/WebCore/platform/animation -I./Source/WebCore/platform/audio -I./Source/WebCore/platform/graphics -I./Source/WebCore/platform/graphics/filters -I./Source/WebCore/platform/graphics/filters/arm -I./Source/WebCore/platform/graphics/gpu -I./Source/WebCore/platform/graphics/opengl -I./Source/WebCore/platform/graphics/opentype -I./Source/WebCore/platform/graphics/transforms -I./Source/WebCore/platform/image-decoders -I./Source/WebCore/platform/image-decoders/bmp -I./Source/WebCore/platform/image-decoders/gif -I./Source/WebCore/platform/image-decoders/ico -I./Source/WebCore/platform/image-decoders/jpeg -I./Source/WebCore/platform/image-decoders/webp -I./Source/WebCore/platform/image-decoders/png -I./Source/WebCore/platform/leveldb -I./Source/WebCore/platform/mediastream -I./Source/WebCore/platform/mock -I./Source/WebCore/platform/network -I./Source/WebCore/platform/sql -I./Source/WebCore/platform/text -I./Source/WebCore/platform/text/transcoder -I./Source/WebCore/platform/win -I./Source/WebCore/plugins -I./Source/WebCore/plugins/win -I./Source/WebCore/rendering -I./Source/WebCore/rendering/mathml -I./Source/WebCore/rendering/style -I./Source/WebCore/rendering/svg -I./Source/WebCore/storage -I./Source/WebCore/svg -I./Source/WebCore/svg/animation -I./Source/WebCore/svg/graphics -I./Source/WebCore/svg/graphics/filters -I./Source/WebCore/svg/properties -I./Source/WebCore/testing -I./Source/WebCore/testing/js -I./Source/WebCore/webaudio -I./Source/WebCore/websockets -I./Source/WebCore/workers -I./Source/WebCore/xml -I./Source/WebCore/xml/parser -I./WebCore/bindings/js -I./DerivedSources/WebCore -I./DerivedSources -I./DerivedSources/JavaScriptCore -DDATA_DIR=\"/opt/local/share\" -DENABLE_CHANNEL_MESSAGING=1 -DENABLE_METER_TAG=1 -DENABLE_PROGRESS_TAG=1 -DENABLE_JAVASCRIPT_DEBUGGER=1 -DENABLE_GAMEPAD=0 -DENABLE_SQL_DATABASE=1 -DENABLE_DATALIST=1 -DENABLE_DIRECTORY_UPLOAD=0 -DENABLE_MUTATION_OBSERVERS=1 -DENABLE_TOUCH_ICON_LOADING=0 -DENABLE_INPUT_COLOR=0 -DENABLE_INPUT_SPEECH=0 -DENABLE_ICONDATABASE=1 -DENABLE_VIDEO=1 -DENABLE_MEDIA_SOURCE=0 -DENABLE_MEDIA_STATISTICS=1 -DENABLE_FULLSCREEN_API=1 -DENABLE_VIDEO_TRACK=1 -DENABLE_MEDIA_STREAM=1 -DENABLE_XSLT=1 -DENABLE_WORKERS=1 -DENABLE_SHADOW_DOM=1 -DENABLE_SHARED_WORKERS=1 -DENABLE_FILTERS=1 -DENABLE_GEOLOCATION=1 -DENABLE_CLIENT_BASED_GEOLOCATION=1 -DENABLE_MATHML=1 -DENABLE_SVG=1 -DENABLE_SVG_FONTS=1 -DENABLE_WEB_SOCKETS=1 -DENABLE_BLOB=1 -DENABLE_REQUEST_ANIMATION_FRAME=1 -DENABLE_WEBGL=1 -DENABLE_MHTML=1 -I./Source/WebCore/loader/archive/mhtml -DENABLE_MICRODATA=1 -DWEBKITGTK_API_VERSION_STRING=\"1.0\" -DWTF_USE_SOUP=1 -I./Source/WebCore/accessibility/gtk -I./Source/WebCore/loader/gtk -I./Source/WebCore/page/gtk -I./Source/WebCore/platform/cairo -I./Source/WebCore/platform/audio/gstreamer -I./Source/WebCore/platform/graphics/cairo -I./Source/WebCore/platform/graphics/glx -I./Source/WebCore/platform/graphics/gstreamer -I./Source/WebCore/platform/graphics/gtk -I./Source/WebCore/platform/gtk -I./Source/WebCore/platform/network/soup -DWTF_USE_PANGO=1 -I./Source/WebCore/platform/graphics/pango -I./Source -I./Source/JavaScriptCore -I./Source/JavaScriptCore/API -I./Source/JavaScriptCore/assembler -I./Source/JavaScriptCore/bytecode -I./Source/JavaScriptCore/bytecompiler -I./Source/JavaScriptCore/dfg -I./Source/JavaScriptCore/heap -I./Source/JavaScriptCore/debugger -I./Source/JavaScriptCore/ForwardingHeaders -I./Source/JavaScriptCore/interpreter -I./Source/JavaScriptCore/jit -I./Source/JavaScriptCore/jit -I./Source/JavaScriptCore/parser -I./Source/JavaScriptCore/profiler -I./Source/JavaScriptCore/runtime -I./Source/JavaScriptCore/tools -I./Source/JavaScriptCore/wtf -I./Source/JavaScriptCore/wtf -I./Source/JavaScriptCore/wtf/gobject -I./Source/JavaScriptCore/wtf/gtk -I./Source/JavaScriptCore/wtf/text -I./Source/JavaScriptCore/wtf/unicode -I./Source/JavaScriptCore/yarr -I./DerivedSources/JavaScriptCore -I./Source/WTF -fno-strict-aliasing -I/opt/local/include/cairo -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -I/opt/local/include/pixman-1 -I/opt/local/include/freetype2 -I/opt/local/include/libpng15 -D_REENTRANT -I/opt/local/include/enchant -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -I/opt/local/include -I/opt/local/include/dbus-1.0 -I/opt/local/include/libxml2 -I/opt/local/lib/dbus-1.0/include -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -D_REENTRANT -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -D_REENTRANT -I/opt/local/include/gstreamer-0.10 -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -I/opt/local/include/libxml2 -D_REENTRANT -I/opt/local/include/libsoup-2.4 -I/opt/local/include/libxml2 -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -I/opt/local/include/libxml2 -I/opt/local/include -I/opt/local/include/libxml2 -D_REENTRANT -I/opt/local/include/pango-1.0 -I/opt/local/include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/include -I/opt/local/include/freetype2 -I/opt/local/include -I/opt/local/include -I/opt/local/include -I/opt/local/include -fvisibility-inlines-hidden -fno-rtti -pipe -O2 -arch ppc -O2 -MT Source/WebCore/platform/libWebCore_la-Length.lo -MD -MP -MF Source/WebCore/platform/.deps/libWebCore_la-Length.Tpo -c Source/WebCore/platform/Length.cpp -fno-common -DPIC -o Source/WebCore/platform/.libs/libWebCore_la-Length.o Source/WebCore/platform/Length.cpp:156: error: size of array 'dummylength_should_stay_small' is negative make[1]: *** [Source/WebCore/platform/libWebCore_la-Length.lo] Error 1 make: *** [all] Error 2 713549 1 162550 jeremyhu 2012-09-06 12:04:37 -0700 Created attachment 162550 preprocessed source 713556 2 jeremyhu 2012-09-06 12:11:58 -0700 sizeof(WebCore::Length) is 16 sizeof(WebCore::SameSizeAsLength) is 8 713560 3 jeremyhu 2012-09-06 12:17:06 -0700 Yeah, I don't know why that assert should be there. It's clear that it is not the case. The assert is essentially saying that these two structures should take up the same amount of memory, and that's clearly not the case: struct Length { union { int m_intValue; float m_floatValue; }; bool m_quirk; unsigned char m_type; bool m_isFloat; }; struct SameSizeAsLength { int32_t value; int32_t metaData; }; 713572 4 jeremyhu 2012-09-06 12:27:35 -0700 Or rather, it makes assumptions about packing and sizes that aren't always true... 713857 5 ap 2012-09-06 16:53:30 -0700 This assertion should pass for any port that doesn't want to waste memory on lengths, so the right fix would be to correct Length structure definition. This does not imply that we would necessarily accept a patch for PowerPC alone. 1025759 6 simon.fraser 2014-07-30 12:01:56 -0700 No plans to make PPC build. 162550 2012-09-06 12:04:37 -0700 2012-09-06 12:05:02 -0700 preprocessed source libWebCore_la-Length.pp.c text/plain 608166 jeremyhu IyAxICJTb3VyY2UvV2ViQ29yZS9wbGF0Zm9ybS9MZW5ndGguY3BwIgojIDEgIjxidWlsdC1pbj4i CiMgMSAiPGNvbW1hbmQtbGluZT4iCiMgMSAiU291cmNlL1dlYkNvcmUvcGxhdGZvcm0vTGVuZ3Ro LmNwcCIKIyAyNSAiU291cmNlL1dlYkNvcmUvcGxhdGZvcm0vTGVuZ3RoLmNwcCIKIyAxICIuL1Nv dXJjZS9XZWJDb3JlL2NvbmZpZy5oIiAxCiMgMjYgIi4vU291cmNlL1dlYkNvcmUvY29uZmlnLmgi CiMgMSAiLi9hdXRvdG9vbHNjb25maWcuaCIgMQojIDI3ICIuL1NvdXJjZS9XZWJDb3JlL2NvbmZp Zy5oIiAyCgoKCiMgMSAiLi9Tb3VyY2UvSmF2YVNjcmlwdENvcmUvd3RmL1BsYXRmb3JtLmgiIDEK IyAzMiAiLi9Tb3VyY2UvSmF2YVNjcmlwdENvcmUvd3RmL1BsYXRmb3JtLmgiCiMgMSAiLi9Tb3Vy Y2UvSmF2YVNjcmlwdENvcmUvd3RmL0NvbXBpbGVyLmgiIDEKIyAzMyAiLi9Tb3VyY2UvSmF2YVNj cmlwdENvcmUvd3RmL1BsYXRmb3JtLmgiIDIKIyAzMTkgIi4vU291cmNlL0phdmFTY3JpcHRDb3Jl 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