[LLVMdev] Runtime exception in DominatorTree.getRootNode()

[Bill He]

Thanks for your reply, John.

I am using opt to run my pass. Should opt by default link in the library?
Would you please give me some idea on fixing it? Thanks!

opt -load ../../../Debug+Asserts/lib/LLVMHello.dylib -hello < hello.bc >
/dev/null

 My pass is just:

#include "llvm/IR/Function.h"
#include "llvm/Pass.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Analysis/Dominators.h"

using namespace llvm;

namespace {
  struct Hello : public FunctionPass {
    static char ID;
    Hello() : FunctionPass(ID) { }
    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
      AU.addRequired<DominatorTree>();
    }
    virtual bool runOnFunction(Function &F) {
      DominatorTree& DT = getAnalysis<DominatorTree>();
      BasicBlock* BB = DT.getRoot();
      return false;
    }
  };
}
char Hello::ID = 0;
static RegisterPass<Hello> Z("hello", "My test analysis", true, true);


On Fri, Apr 12, 2013 at 9:32 AM, John Criswell <criswell at illinois.edu>wrote:

>  On 4/11/13 10:30 PM, Bill He wrote:
>
> Hi all,
>
>  I am trying to traverse a dominator tree and have encountered a weird
> runtime exception:
>
>  Here's my simple code:
>
>      virtual bool runOnFunction(Function &F) {
>       DominatorTree& DT = getAnalysis<DominatorTree>();
>
>    *    DomTreeNode* rootNode = DT.getRootNode();*
>       return false.
> }
>
>  Here's the documentation page:
> http://llvm.org/docs/doxygen/html/classllvm_1_1DominatorTree.html
>
>  And here's my runtime exception:
>  dyld: lazy symbol binding failed: Symbol not found:
> __ZN4llvm17DominatorTreeBaseINS_10BasicBlockEE11getRootNodeEv
>   Referenced from:
> /Users/weibohe/Projects/llvm/llvm/Debug+Asserts/lib/LLVMSLVN.dylib
>
>
> How are you running your pass?  Based on the error, it looks like whatever
> tool you're using to run your pass doesn't have the library defining the
> DominatorTree code linked in.
>
> -- John T.
>
>     Expected in: flat namespace
>
>  dyld: Symbol not found:
> __ZN4llvm17DominatorTreeBaseINS_10BasicBlockEE11getRootNodeEv
>   Referenced from:
> /Users/weibohe/Projects/llvm/llvm/Debug+Asserts/lib/LLVMSLVN.dylib
>   Expected in: flat namespace
>
>  0  opt               0x0000000105f528de
> llvm::sys::PrintStackTrace(__sFILE*) + 46
> 1  opt               0x0000000105f52beb
> _ZL28PrintStackTraceSignalHandlerPv + 27
> 2  opt               0x0000000105f52ef9 _ZL13SignalHandleri + 297
> 3  libsystem_c.dylib 0x00007fff90d32cfa _sigtramp + 26
> 4  libsystem_c.dylib 0xfffffffffffffff8 _sigtramp + 1865208600
> 5  libsystem_c.dylib 0x00007fff64a41948 _sigtramp + 3553684584
> 6  libdyld.dylib     0x00007fff8afe2716 dyld_stub_binder_ + 13
> 7  LLVMSLVN.dylib    0x00000001081a8040 void
> std::__destroy_aux<llvm::PassInfo const**>(llvm::PassInfo const**,
> llvm::PassInfo const**, std::__true_type) + 19904
> 8  LLVMSLVN.dylib    0x00000001081998c1 (anonymous
> namespace)::DVN::runOnFunction(llvm::Function&) + 65
> 9  opt               0x0000000105eb27b2
> llvm::FPPassManager::runOnFunction(llvm::Function&) + 434
> 10 opt               0x0000000105eb2a98
> llvm::FPPassManager::runOnModule(llvm::Module&) + 104
> 11 opt               0x0000000105eb2e9a
> llvm::MPPassManager::runOnModule(llvm::Module&) + 634
>  12 opt               0x0000000105eb36ae
> llvm::PassManagerImpl::run(llvm::Module&) + 302
> 13 opt               0x0000000105eb3951
> llvm::PassManager::run(llvm::Module&) + 33
> 14 opt               0x0000000104e4d335 main + 6549
> 15 opt               0x0000000104e3e434 start + 52
> Stack dump:
> 0. Program arguments: opt -load ../../../Debug+Asserts/lib/LLVMSLVN.dylib
> -dvn
> 1. Running pass 'Function Pass Manager' on module '<stdin>'.
> 2. Running pass 'My test analysis' on function '@main'
>
>
>  Any idea on why this is happening? Any help or suggestion is
> appreciated! Thanks in advance.
>
>  Best,
> Weibo
>
>
>
> _______________________________________________
> LLVM Developers mailing listLLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
>
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