ITANIUM C ABI PDF

No virtual base classes. Declares virtual functions. The virtual table contains offset-to-top and RTTI fields followed by virtual function pointers as specified above. Inherits virtual functions. The class has a virtual table for each proper base class that has a virtual table.

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It should not be sacrificed for the benefit of language extensions or legacy implementations though considering them as tie-breakers is fine. Some areas will be easier to agree on than others. That is, it is better to end up with a few restrictions being required for interoperable code, than to have no interoperability at all. This suggests priorities as follows: Items requiring base ABI changes that might affect other languages, and will therefore become impossible soon.

Examples include data layout and calling conventions. Limited usage features, where users can achieve portability by avoiding the feature. An example might be multi-threading. Peripheral features, where the requirements on users to achieve portability are clear and easy to implement. An example is non-explicit inlining, where compilers would presumably allow it to just be suppressed.

Tool interfaces, which affect how users build code, rather than what they build. An example is the compilation command line. For instance, packaging vendor-specific compiler support runtimes in DSOs occupying distinct namespaces might allow multiple such DSOs to be loaded for mixed objects and avoid requiring that all vendors have the same support runtimes.

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Itanium C++ ABI

Samurisar These objects are named according to the rules for local names in the Scope Encoding section above, and the definition of each is emitted in a COMDAT group, identified by the symbol name described in the Scope Encoding section above. More important, it does not deal at all with the ability in most implementations to remove DSOs from a running program image by calling dlclose prior to program termination. The offset-to-top and RTTI fields contain information for the class, rather than for the base class. The types are substantively different if B is a morally virtual base of D or if B is not located at offset zero tianium D. A result of an empty class type itaniim be returned as though it were a struct containing a single char, i. If there is an error in demangling, the return value is a null pointer.

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Itanium C++ ABI (Revision: 1.83)

It should not be sacrificed for the benefit of language extensions or legacy implementations though considering them as tie-breakers is fine. Some areas will be easier to agree on than others. That is, it is better to end up with a few restrictions being required for interoperable code, than to have no interoperability at all. This suggests priorities as follows: Items requiring base ABI changes that might affect other languages, and will therefore become impossible soon. Examples include data layout and calling conventions. Limited usage features, where users can achieve portability by avoiding the feature. An example might be multi-threading.

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ITANIUM C ABI PDF

Type bool has size and alignment 1. All of these types have data size and non-virtual size equal to their size. We ignore tail padding for PODs because the Standard does not allow us to use it for anything else. A NULL pointer is represented as A pointer to member function is a pair as follows: ptr: For a non-virtual function, this field is a simple function pointer. The value zero represents a NULL pointer, independent of the adjustment field value below. It has the size, data size, and alignment of a class containing those two members, in that order.

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