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http://www.openoffice.org/issues/show_bug.cgi?id=111460
Issue #|111460
Summary|crash in GraphiteLayout if stlport_debug is active
Component|gsl
Version|OOO320m17
Platform|All
URL|
OS/Version|All
Status|NEW
Status whiteboard|
Keywords|
Resolution|
Issue type|DEFECT
Priority|P3
Subcomponent|code
Assigned to|hdu
Reported by|hdu
------- Additional comments from h...@openoffice.org Fri May 7 15:06:33 +0000
2010 -------
AW noticed in issue 111392 a strange crash on a non-product windows build if
the bugdoc there was
loaded and the required fonts were installed on the system.
The problem is that the check GlyphSetIterator::operator!=() is not called if
stlport_port debug is active,
so that the check "gj != charGlyphs.second" in
GraphiteLayout::Glyphs::fill_from() is not triggered
though it should according to the overloaded operator.
The stlport_debug code wraps the GlyphSetIterator and seems to keep its
_M_iterator as type "int*"
instead of a proper GlyphSetIterator, so of course the pointers get then
compared directly instead of
using the proper compare for the GlyphSetIterator.
So the root cause of the problem seems to be the interaction of the used
compiler + optimization +
stlport_debug's iterator wrapper.
@kstribley: we should probably rewrite the problem line graphite_layout.cxx:249
(for DEV300_m77) not
to drive the compiler so hard. There are other related things such as that
operator!= is defined as
{!(*this==rhs;} and operator*() is overloaded, such that the != case is much
more tricky than the
corresponding operator== case. Especially since the dereference operator*()
checks some assertions.
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