138 lines
3.0 KiB
Plaintext
138 lines
3.0 KiB
Plaintext
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Linking and Embedding Call Tracing
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Alex Gounares (alexgo), 12/15/93
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------------------------------
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NB: All call tracing added to the L&E layers of OLE *must*
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conform to this spec; post processing tools may break otherwise.
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Syntax of this grammar:
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non-terminals are bracketed with underscores (e.g. _foo_)
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Other tokens are literally or as described
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General:
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Call logging should be done via the LEDebugOut macro, which
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takes the following parameters:
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LEDebugOut(( _type_ , _formatstring_ , _arguments));
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_type_ : DEB_TRACE
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| DEB_ITRACE
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;
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DEB_TRACE should be used for any API or method *directly*
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reachable by an OLE app.
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DEB_ITRACE should be used for all internal APIs and
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methods.
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In some circumstances (an important internal function),
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it is permissible to use DEB_TRACE for internal functions
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and methods, but this is discouraged.
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_arguments_ : whatever is needed by _formatstring_
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There are three _formatstring_ formats currently supported,
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one for function entrance, another for function exit, and
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a third for object deletion. More formats may be added
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as needed, so tools must be prepared to ignore
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non-conforming strings (as it may be a new format for a new
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tool).
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_formatstring_ : _in_
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| _out_
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| _delete_
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;
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Function entrance: // _IN is literal
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_in_ : "_this_ _IN _name_ _args_ _extra_ \n"
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;
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_this_ : %p
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//should be passed the pointer
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//to the *top* level object in
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//the class (if the this pointer
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//points to a nested class)
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//If a function, then 0 should be
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//passed.
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;
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_name_ : // the complete name of the function
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// or method (i.e. CFoo::CBar::Blah)
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_args_ : ( )
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| ( _arglist_ )
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;
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_arglist_ : _arglist_ , _arg_
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| _arg_
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;
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_arg_ : _string_
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| _integral_
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;
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_string_ : \"%s\"
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| \"%ws\"
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;
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_integral_ : any printf conversion string
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other than strings (see NOTES)
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_extra_ : an arbitrary number of bytes
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with no newline character
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Function exit:
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_out_ : "_this_ OUT _name_ _return_ _outparams_ _extra_ \n"
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;
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_return_ : ( _arg_ )
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;
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_outparams_ : [ _arglist_ ] // used to put the
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| // values of the
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; // out parameters
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Object Deletion:
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_delete_ : "_this_ DELETED _extra_ \n"
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;
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NOTES:
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1. The newline does not need to be preceeded by a space.
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Other spaces in the grammar are intentional (the
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space character is the token delimiter)
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2. Tools should ignore any extra bytes after the known
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fields to be compatible with future revs of the
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logging.
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3. In general, the following conversion codes are used
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for the following data types. These are not binding,
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however, individual functions/methods may do
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something different as appropriate.
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HRESULT %lx
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pointer %p
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DWORD %lu
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DWORD(bitflags) %lx
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ULONG %lu
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LONG %ld
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REFGUID %p
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4. For in/out params, in may be awkward to print
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the out value (since it may be a long piece of
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memory). In this case, just printing the pointer
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value (although the same as the argument) is
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sufficient.
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