[Webkit-unassigned] [Bug 46794] Crashes randomly in cairo_scaled_font_destroy

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=46794





--- Comment #2 from Priit Laes (IRC: plaes) <plaes at plaes.org>  2010-10-10 02:55:39 PST ---
(In reply to comment #1)
> Looks like some of the HashTraits machinery is missing for PlatformRefPtr. Do you think you can try this patch and see if it improves things?

It seems that something is still missing, as it crashed with the patch:

#7  cairo_scaled_font_destroy (scaled_font=0xffffffffffffffff) at cairo-scaled-font.c:1221
#8  0x00007f689a7377f5 in operator= (this=0x7f67effa9bc0, other=...) at ./JavaScriptCore/wtf/PlatformRefPtr.h:115
#9  WebCore::FontPlatformData::operator= (this=0x7f67effa9bc0, other=...) at WebCore/platform/graphics/cairo/FontPlatformDataFreeType.cpp:169
#10 0x00007f689a45b161 in translate (this=<value optimized out>, key=<value optimized out>, mapped=<value optimized out>) at ./JavaScriptCore/wtf/HashMap.h:124
#11 add<WebCore::FontPlatformData, std::pair<WebCore::SimpleFontData*, unsigned int>, WTF::HashMapTranslator<std::pair<WebCore::FontPlatformData, std::pair<WebCore::SimpleFontData*, unsigned int> >, WTF::PairHashTraits<WebCore::FontDataCacheKeyTraits, WTF::HashTraits<std::pair<WebCore::SimpleFontData*, unsigned int> > >, WebCore::FontDataCacheKeyHash> > (this=<value optimized out>, key=<value optimized out>, mapped=<value optimized out>) at ./JavaScriptCore/wtf/HashTable.h:691
#12 inlineAdd (this=<value optimized out>, key=<value optimized out>, mapped=<value optimized out>) at ./JavaScriptCore/wtf/HashMap.h:241
#13 WTF::HashMap<WebCore::FontPlatformData, std::pair<WebCore::SimpleFontData*, unsigned int>, WebCore::FontDataCacheKeyHash, WebCore::FontDataCacheKeyTraits, WTF::HashTraits<std::pair<WebCore::SimpleFontData*, unsigned int> > >::set (this=<value optimized out>, key=<value optimized out>, mapped=<value optimized out>) at ./JavaScriptCore/wtf/HashMap.h:248
#14 0x00007f689a457cd5 in WebCore::FontCache::getCachedFontData (this=<value optimized out>, platformData=0x7f67f5443680) at WebCore/platform/graphics/FontCache.cpp:282
#15 0x00007f689a459eba in WebCore::FontCache::getFontData (this=0x7f689cdec048, font=..., familyIndex=@0x7f67ee92fd80, fontSelector=0x7f67e9c6b840) at WebCore/platform/graphics/FontCache.cpp:388
#16 0x00007f689a45dd8a in WebCore::FontFallbackList::fontDataAt (this=0x7f67ee92fd20, font=<value optimized out>, realizedFontIndex=<value optimized out>) at WebCore/platform/graphics/FontFallbackList.cpp:105
#17 0x00007f689a45ded8 in primaryFontData (this=0xffffffffffffffff, font=0x7f67f5443680) at WebCore/platform/graphics/FontFallbackList.h:66
#18 WebCore::FontFallbackList::determinePitch (this=0xffffffffffffffff, font=0x7f67f5443680) at WebCore/platform/graphics/FontFallbackList.cpp:76
#19 0x00007f689a4fba55 in isFixedPitch (this=<value optimized out>, resolver=<value optimized out>, firstLine=<value optimized out>, isLineEmpty=<value optimized out>, previousLineBrokeCleanly=<value optimized out>, hyphenated=@0x7fff6621b0c9, clear=0x7fff6621b0b4, lastFloatFromPreviousLine=0x0) at ./WebCore/platform/graphics/FontFallbackList.h:47
#20 isFixedPitch (this=<value optimized out>, resolver=<value optimized out>, firstLine=<value optimized out>, isLineEmpty=<value optimized out>, previousLineBrokeCleanly=<value optimized out>, hyphenated=@0x7fff6621b0c9, clear=0x7fff6621b0b4, lastFloatFromPreviousLine=0x0) at ./WebCore/platform/graphics/Font.h:251
#21 WebCore::RenderBlock::findNextLineBreak (this=<value optimized out>, resolver=<value optimized out>, firstLine=<value optimized out>, isLineEmpty=<value optimized out>, previousLineBrokeCleanly=<value optimized out>, hyphenated=@0x7fff6621b0c9, clear=0x7fff6621b0b4, lastFloatFromPreviousLine=0x0) at WebCore/rendering/RenderBlockLineLayout.cpp:1639
#22 0x00007f689a4fce5f in WebCore::RenderBlock::layoutInlineChildren (this=0x7f67f127f878, relayoutChildren=<value optimized out>, repaintTop=@0x7fff6621b1dc, repaintBottom=@0x7fff6621b1d8) at WebCore/rendering/RenderBlockLineLayout.cpp:684

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