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ABI limitation on the size of a class
- To: cxx-abi-dev@xxxxxxxxxxxxxxxx
- Subject: ABI limitation on the size of a class
- From: Christian BRUEL <christian.bruel@xxxxxx>
- Date: Wed, 23 Feb 2005 17:35:21 +0100
I'm trying to understand the rational for the 1.2 Limit section in the
itanium C++ ABI (http://www.codesourcery.com/cxx-abi/abi.html#limits)
The section says that this limitation is due to RTTI implementation. Is
it because of the field to the beginning of the complete type in the
typeinfos ?
in the libstdc++ sources (gcc 3.3.3) this field ("whole_object" field)
has type ptrdiff_t so the only limitation I can find in the size of an
object is 2**31 bytes for a 32 bit machine.
The raisons should hide elsewhere, but I really don't see...
thank you,
Christian
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