[LLVMdev] 'opt' Aborted "While deleting: void %"

[Griffin Wright]

Yes, it does - all function-wide data structures are cleared/initialized at
the beginning of each function.  But perhaps I need to delete them after
the last function instance?  I'm modifying someone's existing pass, and
this code worked for them at the time, albeit with a slightly older version
of LLVM.  Hmm.

-Griffin

On Thu, 12 Jan 2012 21:26:41 +0100, Duncan Sands <baldrick at free.fr> wrote:
> Hi Griffin, did your pass create a data structure that holds values
> somehow,
> and forgot to delete it?  Also, try running under valgrind in case this
is
> due to a memory error of some kind.
> 
> Ciao, Duncan.
> 
>> So I have an LLVM pass that appears to run completely and work fine, and
>> then it aborts at the very end.  When exiting the final runOnFunction
>> call,
>> I get the following error / stack dump.  I cannot figure out why this is
>> happening for the life of me - does anyone have any ideas?  I'm not
>> trying
>> to do any crazy deallocation or anything, it just seems like a normal
>> pass
>> to me.
>>
>> Thanks,
>> Griffin Wright
>>
>> While deleting: void %
>> An asserting value handle still pointed to this value!
>> UNREACHABLE executed at
>> /x/grwright/llvm/llvm-2.9/lib/VMCore/Value.cpp:569!
>> 0  libLLVM-2.9.so 0xf6ef856b
>> 1  libLLVM-2.9.so 0xf6ef82f8
>> 2                 0xf7782400 __kernel_sigreturn + 0
>> 3  libc.so.6      0xf57d4d52 abort + 386
>> 4  libLLVM-2.9.so 0xf6ee40d4 llvm::SmallVector<char,
64u>::~SmallVector()
>> +
>> 0
>> 5  libLLVM-2.9.so 0xf6a5ce2e
>> llvm::ValueHandleBase::ValueIsDeleted(llvm::Value*) + 662
>> 6  libLLVM-2.9.so 0xf6a5b1ec llvm::Value::~Value() + 58
>> 7  libLLVM-2.9.so 0xf66ee041 llvm::User::~User() + 93
>> 8  libLLVM-2.9.so 0xf6a00d89 llvm::Instruction::~Instruction() + 121
>> 9  libLLVM-2.9.so 0xf6a0351f llvm::CallInst::~CallInst() + 57
>> 10 libLLVM-2.9.so 0xf68d9671
>>
llvm::ilist_node_traits<llvm::Instruction>::deleteNode(llvm::Instruction*)
>> + 30
>> 11 libLLVM-2.9.so 0xf68d8c80 llvm::iplist<llvm::Instruction,
>> llvm::ilist_traits<llvm::Instruction>
>>> ::erase(llvm::ilist_iterator<llvm::Instruction>) + 48
>> 12 libLLVM-2.9.so 0xf696ac37 llvm::iplist<llvm::Instruction,
>> llvm::ilist_traits<llvm::Instruction>
>>> ::erase(llvm::ilist_iterator<llvm::Instruction>,
>> llvm::ilist_iterator<llvm::Instruction>) + 49
>> 13 libLLVM-2.9.so 0xf696a7a0 llvm::iplist<llvm::Instruction,
>> llvm::ilist_traits<llvm::Instruction>  >::clear() + 102
>> 14 libLLVM-2.9.so 0xf6969420 llvm::BasicBlock::~BasicBlock() + 314
>> 15 libLLVM-2.9.so 0xf696adb2
>> llvm::ilist_node_traits<llvm::BasicBlock>::deleteNode(llvm::BasicBlock*)
>> +
>> 30
>> 16 libLLVM-2.9.so 0xf696a9a8 llvm::iplist<llvm::BasicBlock,
>> llvm::ilist_traits<llvm::BasicBlock>
>>> ::erase(llvm::ilist_iterator<llvm::BasicBlock>) + 48
>> 17 libLLVM-2.9.so 0xf696958f llvm::BasicBlock::eraseFromParent() + 77
>> 18 libLLVM-2.9.so 0xf69b7b11 llvm::Function::dropAllReferences() + 159
>> 19 libLLVM-2.9.so 0xf6a2dc59 llvm::Module::dropAllReferences() + 81
>> 20 libLLVM-2.9.so 0xf6a2caf2 llvm::Module::~Module() + 50
>> 21 opt            0x08081e36 std::auto_ptr<llvm::Module>::~auto_ptr() +
>> 36
>> 22 opt            0x0807d5a4 main + 5045
>> 23 libc.so.6      0xf57bdbd6 __libc_start_main + 230
>> 24 opt            0x0806de41
>> Stack dump:
>> 0.	Program arguments: opt -debug -load
>> /x/grwright/llvm/llvm-sfi/RelRecovery/Debug+Asserts/lib/relRecovery.so
>> -profile-loader -profile-info-file=164.gzip/llvmprof.out -relRecovery
>> -rr-analysis-only -rr-use-exec-prof=true -rr-bench=164.gzip
>> 164.gzip/164.gzip.link.bc -o 164.gzip/164.gzip.rel.bc
>> Aborted
>>
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