<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"> <br>Hi all,<br> I wrote a function pass. In the pass, it ran through all the instruction that call to functions. When arriving at the exact function that I m interested in, it would insert a self-made function.<br><br> Now I've finished the pass, the compilation is successful. The pass can find the function I like and can insert the CallInst to call my check function. BUT, when running the pass, it breaks down. The Diagnose is as follow,<br><br>************************************************************************************<br><b>Referencing function in another module!<br> %CallCheck = call i32 @check()<br>Broken module found, compilation aborted!</b><br>0 opt 0x087aa95b<br>1 opt 0x087aa6e8<br>2 0x00d54400 __kernel_sigreturn + 0<br>3 libc.so.6 0x009c2a82 abort + 386<br>4 opt 0x08756f15<br>5 opt 0x08756c2d<br>6 opt 0x0873a18a llvm::FPPassManager::runOnFunction(llvm::Function&) + 306<br>7 opt 0x0873a34a llvm::FPPassManager::runOnModule(llvm::Module&) + 114<br>8 opt 0x0873a62a llvm::MPPassManager::runOnModule(llvm::Module&) + 400<br>9 opt 0x0873aae0 llvm::PassManagerImpl::run(llvm::Module&) + 122<br>10 opt 0x0873ada5 llvm::PassManager::run(llvm::Module&) + 39<br>11 opt 0x0827cec3 main + 4475<br>12 libc.so.6 0x009abbd6 __libc_start_main + 230<br>13 opt 0x0826e811<br>Stack dump:<br>0. Program arguments: opt -load ../../../Debug+Asserts/lib/Hello.so -hello <br>1. Running pass 'Function Pass Manager' on module '<stdin>'.<br>2. Running pass 'Module Verifier' on function '@main'<br>*****************************************************************************************************************<br>*****************************************************************************************************************<br><span style="font-size: 24px;">The source code is like,</span><br><br><b>// my "check function"</b><br>int check()<br>{<br> printf("Hello me!!\n");<br> return 0;<br>}<br><br><br><b>//Create a function prototype exactly like "int check()", then create a call instruction to that function.</b><br>Module * M;<br>LLVMContext Context;<br> FunctionType *STy=FunctionType::get(Type::getInt32Ty(Context), false);<br> Function *check = Function::Create(STy, Function::InternalLinkage, "check" ,M);<br> CallInst *callcheck = CallInst::Create(check,"CallCheck");<br><br>namespace {<br>struct Hello : public FunctionPass<br> {<br> static char ID;<br> Hello() : FunctionPass(ID) {}<br> virtual bool runOnFunction(Function &F)<br> {<br><b>// run through all the instruction and find the one that call <br>"puts</b><br> for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI)<br> {<br> for(BasicBlock::iterator II = BI->begin(),IE = BI->end();II != IE; ++II)<br> {<br> if(CallInst * III = dyn_cast<CallInst>(II))<br> {<br><br> if(III->getCalledFunction()!=NULL&&III->getCalledFunction()->getName()=="puts")<br> {<br> errs() <<III->getCalledFunction()->getName()<<" function found!\n";<br> callcheck->insertBefore(II);<br> errs() <<"INSERT SUCCEEDED!!!!!!!!\n";<br> }<br> else<br> {<br> errs() <<"it's not main function!\n"<<"it is:"<<III->getCalledFunction()->getName()<<'\n';<br> }<br> }/**/<br> <br> }<br>************************************************************************************************************************************************************************************************************************************************************************************************<br>QUESTION: IS IT BECAUSE THE PASS CAN'T RECOGNIZE MY CHECK FUNCTION OR WHAT?? HOW TO MAKE THE PASS WORK AS EXPECTED???<br>THANK YOU!!<br><br><div>--<br><div>
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<div><font color="#c0c0c0"><font size="3">2012-04-07</font></font></div></span></font></div>
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<div><font color="#c0c0c0"><font size="3">Name: Õç¿(ZhenKai)<br>Homepage:http://www.renren.com/262729393</font></font></div>
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