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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal">I'm trying to utilize Clang for mocking. <o:p></o:p></p>
<p class="MsoNormal">Starting for simplicity from C language – I would like to create:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span dir="LTR"></span>Identical function for each function found (e.g. foo_wrapper() for foo()).<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span dir="LTR"></span>All calls to original function (e.g. foo()) should instead call the wrapper (e.g. foo_wrapper()).<o:p></o:p></p>
<p class="MsoNormal">(the wrappers themselves can be left as undefined symbols to be resolved in link).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I started by using Clang plug-in with a RecursiveASTVisitor that when visiting a function does the following code: (the visitor is called from HandleTopLevelDecl of an ASTConsumer)<o:p></o:p></p>
<p class="MsoNormal"> FunctionDecl* NewFD=FunctionDecl::Create(getContext(), getContext().getTranslationUnitDecl(), f->getSourceRange().getBegin(), f->getSourceRange().getEnd(), DeclarationName(&newNameIdInfo), f->getReturnType(),
f->getTypeSourceInfo(), f->getStorageClass());<o:p></o:p></p>
<p class="MsoNormal"> NewFD->setLexicalDeclContext(getContext().getTranslationUnitDecl());<o:p></o:p></p>
<p class="MsoNormal"> SmallVector<ParmVarDecl*, 16> Params;<o:p></o:p></p>
<p class="MsoNormal"> for(auto iter = f->param_begin(); iter!=f->param_end(); ++iter) {<o:p></o:p></p>
<p class="MsoNormal"> Params.push_back(*iter);<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> NewFD->setParams(Params);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However this does not work and does not add an identical function to be used as wrapper (using nm I don't see the wrapper function symbol).<o:p></o:p></p>
<p class="MsoNormal">Moreover I have no idea how afterwards to set all calls to foo_wrapper instead of foo.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is my general approach correct? Am I missing something?<o:p></o:p></p>
<p class="MsoNormal">Any advice would be greatly appreciated. <o:p></o:p></p>
<p class="MsoNormal">Thanks!<o:p></o:p></p>
<p class="MsoNormal">Eran<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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