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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You will see NULL for indirect callSite.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">May need to add additional checks for this possibility.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Ashutosh<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Qiuping Yi via llvm-dev<br>
<b>Sent:</b> Tuesday, January 19, 2016 5:35 PM<br>
<b>To:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> [llvm-dev] Why getFunction() of CallGraphNode return NULL function?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Hi all,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I want to find all the called functions in each function, thus I iterate the calledFunctions of each CallGraphNode in CallGraph as follow:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">for (CallGraph::iterator it = CG->begin(); it != CG->end(); ++it) {<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> CallGraphNode* node = it->second;<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> for (CallGraphNode::iterator it2 = node->begin(); it2 != node->end(); ++it2) {<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> Function* calledFunc = it2->second=>getFunction();<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> cerr <<</span><span style="font-size:9.5pt;font-family:"Calibri",sans-serif"> </span><span style="font-size:9.5pt">”function: “ << calledFunc->getName().str() <<"\n"; <b>// crash some times</b><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> ... ...<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> ... ...<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> }<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">}<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I found that some time "calledFunc" is NULL function and thus the output crash. I don't known why? If the before code is wrong, so what is the correct method for get all the called functions?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I use LLVM 3.6. Thank you all in advance.<o:p></o:p></span></p>
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<p class="MsoNormal"><br>
--------------------------------------------<br>
Qiuping Yi<br>
Institute Of Software<br>
Chinese Academy of Sciences<o:p></o:p></p>
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