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Despite making sure, it is not NULL, I still get a segmentation fault.</div>
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Code:</div>
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<span>if((cgn->getFunction())==NULL)</span></div>
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<div> continue;</div>
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<span> errs()<<cgn->getFunction()->getName()<<"\n";</span></div>
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<span>Error: </span></div>
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<span><span>0 opt 0x00000000011d2302 llvm::sys::PrintStackTrace(_IO_FILE*) + 34</span></span></div>
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<div>1 opt 0x00000000011d1eb4</div>
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<div>2 libpthread.so.0 0x00007fea1847c330</div>
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<div>3 libcgwalk.so 0x00007fea1767f596</div>
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<div>4 opt 0x00000000010ddb45 llvm::legacy::PassManagerImpl::run(llvm::Module&) + 709</div>
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<div>5 opt 0x0000000000552724 main + 2452</div>
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<div>6 libc.so.6 0x00007fea178a4f45 __libc_start_main + 245</div>
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<div>7 opt 0x000000000056d865</div>
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<div>Stack dump:</div>
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<div>0. Program arguments: opt -load build/proj/libcgwalk.so -cgwalk</div>
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<div>1. Running pass 'Cgwalk' on module '<stdin>'.</div>
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<div>Segmentation fault (core dumped)</div>
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Also, using getName() on the main function prints out an empty string - <i>errs()<<cg[M.getFunction("main")]->getFunction()->getName()<<"\n";</i></div>
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There seems to be some issue with CallGraph generation.</div>
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<div style=""><font face="Times New Roman" size="2" style=""><span style="font-family:"Times New Roman",Times,serif; font-size:12pt">Thanks,
</span></font><span style="font-family:"Times New Roman",Times,serif; font-size:12pt"></span>
<div style=""><font face="Times New Roman" size="2" style=""><span style="font-family:"Times New Roman",Times,serif; font-size:12pt">Chaitra</span></font></div>
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<b>From:</b> Doerfert, Johannes<br>
<b>Sent:</b> Sunday, December 15, 2019 8:38 PM<br>
<b>To:</b> Niddodi, Chaitra<br>
<b>Cc:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [llvm-dev] Error while iterating over callee nodes in CallGraph
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<div class="PlainText">On 12/15, Niddodi, Chaitra via llvm-dev wrote:<br>
> for (CallGraphNode::iterator ti = cgm->begin(); ti != cgm->end(); ++ti)<br>
> {<br>
> CallGraphNode * cgn = ti->second;<br>
> if(cgn==NULL)<br>
> continue;<br>
> errs()<<cgn->getFunction()<<"\n";<br>
> errs()<<cgn->getFunction()->getName()<<"\n";<br>
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I think the function (cgn->getFunction()) can be NULL (to indicate<br>
special edges). Make sure it isn't.<br>
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