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Frank Winter via llvm-dev

2016-Sep-14 14:59 UTC

[llvm-dev] setDataLayout segfault

I get a segfault with this code when setting the data layout:



int main(int argc, char** argv)
{
   llvm::InitializeNativeTarget();

   llvm::LLVMContext TheContext;
   unique_ptr<Module> Mod(new Module("A",TheContext));

   llvm::EngineBuilder engineBuilder(std::move(Mod));
   std::string mcjit_error;

   engineBuilder.setMCPU(llvm::sys::getHostCPUName());

   engineBuilder.setEngineKind(llvm::EngineKind::JIT);
   engineBuilder.setOptLevel(llvm::CodeGenOpt::Aggressive);
   engineBuilder.setErrorStr(&mcjit_error);

   llvm::TargetOptions targetOptions;
   targetOptions.AllowFPOpFusion = llvm::FPOpFusion::Fast;
   engineBuilder.setTargetOptions( targetOptions );

   TargetMachine *targetMachine = engineBuilder.selectTarget();

   assert(targetMachine && "failed to create target machine");

   std::cout << 
targetMachine->createDataLayout().getStringRepresentation() <<
"\n";

   Mod.get()->setDataLayout( 
targetMachine->createDataLayout().getStringRepresentation() ); // this 
segfaults
   Mod.get()->setDataLayout( targetMachine->createDataLayout()  ); // as 
well as this
}


Backtrace:


Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".
e-m:e-i64:64-f80:128-n8:16:32:64-S128

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char, 
void>::end (this=0x148) at 
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
117      iterator end() { return (iterator)this->EndX; }
(gdb) bt
#0  0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char, 
void>::end (this=0x148) at 
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
#1  llvm::SmallVectorImpl<unsigned char>::clear (this=0x148) at 
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:345
#2  0x00007ffff5fa13b5 in llvm::DataLayout::clear (this=0x138) at 
/home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:545
#3  0x00007ffff5f9f561 in llvm::DataLayout::reset (this=0x138, Desc=...) 
at /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:179
#4  0x00007ffff60b25ca in llvm::Module::setDataLayout (this=0x0, 
Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/Module.cpp:377
#5  0x0000000000406c46 in main (argc=1, argv=0x7fffffffde68) at main.cc:95


Any idea?

Frank

Frank Winter via llvm-dev

2016-Sep-14 16:11 UTC

head link

[llvm-dev] setDataLayout segfault

I am constructing the engine builder in the following way:

llvm::SMDiagnostic Err;
unique_ptr<Module> Mod = getLazyIRFileModule("f.ll", Err,
TheContext);
llvm::EngineBuilder engineBuilder(std::move(Mod));

However, after moving the pointer to the constructor it is no longer 
retrievable from the unique_ptr object.

Mod.get()->dump();   // this segfaults after the move, but not before

So I conclude that any type of operation on the module is no longer valid.

Am I constructing the engine builder as it is supposed to?

Frank


On 09/14/2016 10:59 AM, Frank Winter via llvm-dev wrote:> I get a segfault with this code when setting the data layout:
>
>
>
> int main(int argc, char** argv)
> {
>   llvm::InitializeNativeTarget();
>
>   llvm::LLVMContext TheContext;
>   unique_ptr<Module> Mod(new Module("A",TheContext));
>
>   llvm::EngineBuilder engineBuilder(std::move(Mod));
>   std::string mcjit_error;
>
>   engineBuilder.setMCPU(llvm::sys::getHostCPUName());
>
>   engineBuilder.setEngineKind(llvm::EngineKind::JIT);
>   engineBuilder.setOptLevel(llvm::CodeGenOpt::Aggressive);
>   engineBuilder.setErrorStr(&mcjit_error);
>
>   llvm::TargetOptions targetOptions;
>   targetOptions.AllowFPOpFusion = llvm::FPOpFusion::Fast;
>   engineBuilder.setTargetOptions( targetOptions );
>
>   TargetMachine *targetMachine = engineBuilder.selectTarget();
>
>   assert(targetMachine && "failed to create target
machine");
>
>   std::cout << 
> targetMachine->createDataLayout().getStringRepresentation() <<
"\n";
>
>   Mod.get()->setDataLayout( 
> targetMachine->createDataLayout().getStringRepresentation() ); // this 
> segfaults
>   Mod.get()->setDataLayout( targetMachine->createDataLayout()  ); // 
> as well as this
> }
>
>
> Backtrace:
>
>
> Using host libthread_db library 
> "/lib/x86_64-linux-gnu/libthread_db.so.1".
> e-m:e-i64:64-f80:128-n8:16:32:64-S128
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char, 
> void>::end (this=0x148) at 
> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
> 117      iterator end() { return (iterator)this->EndX; }
> (gdb) bt
> #0  0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned 
> char, void>::end (this=0x148) at 
> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
> #1  llvm::SmallVectorImpl<unsigned char>::clear (this=0x148) at 
> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:345
> #2  0x00007ffff5fa13b5 in llvm::DataLayout::clear (this=0x138) at 
> /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:545
> #3  0x00007ffff5f9f561 in llvm::DataLayout::reset (this=0x138, 
> Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:179
> #4  0x00007ffff60b25ca in llvm::Module::setDataLayout (this=0x0, 
> Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/Module.cpp:377
> #5  0x0000000000406c46 in main (argc=1, argv=0x7fffffffde68) at 
> main.cc:95
>
>
> Any idea?
>
> Frank
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Frank Winter via llvm-dev

2016-Sep-14 16:23 UTC

head link

[llvm-dev] setDataLayout segfault

Ok. I can make a copy of the unique_ptr before moving it into the 
builder's constructor and use the copy later on. It is confusing to 
require a unique_ptr.

Frank

On 09/14/2016 12:11 PM, Frank Winter via llvm-dev wrote:> I am constructing the engine builder in the following way:
>
> llvm::SMDiagnostic Err;
> unique_ptr<Module> Mod = getLazyIRFileModule("f.ll", Err,
TheContext);
> llvm::EngineBuilder engineBuilder(std::move(Mod));
>
> However, after moving the pointer to the constructor it is no longer 
> retrievable from the unique_ptr object.
>
> Mod.get()->dump();   // this segfaults after the move, but not before
>
> So I conclude that any type of operation on the module is no longer 
> valid.
>
> Am I constructing the engine builder as it is supposed to?
>
> Frank
>
>
> On 09/14/2016 10:59 AM, Frank Winter via llvm-dev wrote:
>> I get a segfault with this code when setting the data layout:
>>
>>
>>
>> int main(int argc, char** argv)
>> {
>>   llvm::InitializeNativeTarget();
>>
>>   llvm::LLVMContext TheContext;
>>   unique_ptr<Module> Mod(new Module("A",TheContext));
>>
>>   llvm::EngineBuilder engineBuilder(std::move(Mod));
>>   std::string mcjit_error;
>>
>>   engineBuilder.setMCPU(llvm::sys::getHostCPUName());
>>
>>   engineBuilder.setEngineKind(llvm::EngineKind::JIT);
>>   engineBuilder.setOptLevel(llvm::CodeGenOpt::Aggressive);
>>   engineBuilder.setErrorStr(&mcjit_error);
>>
>>   llvm::TargetOptions targetOptions;
>>   targetOptions.AllowFPOpFusion = llvm::FPOpFusion::Fast;
>>   engineBuilder.setTargetOptions( targetOptions );
>>
>>   TargetMachine *targetMachine = engineBuilder.selectTarget();
>>
>>   assert(targetMachine && "failed to create target
machine");
>>
>>   std::cout << 
>> targetMachine->createDataLayout().getStringRepresentation() <<
"\n";
>>
>>   Mod.get()->setDataLayout( 
>> targetMachine->createDataLayout().getStringRepresentation() ); // 
>> this segfaults
>>   Mod.get()->setDataLayout( targetMachine->createDataLayout()  );
//
>> as well as this
>> }
>>
>>
>> Backtrace:
>>
>>
>> Using host libthread_db library 
>> "/lib/x86_64-linux-gnu/libthread_db.so.1".
>> e-m:e-i64:64-f80:128-n8:16:32:64-S128
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char,
>> void>::end (this=0x148) at 
>> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
>> 117      iterator end() { return (iterator)this->EndX; }
>> (gdb) bt
>> #0  0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned 
>> char, void>::end (this=0x148) at 
>> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
>> #1  llvm::SmallVectorImpl<unsigned char>::clear (this=0x148) at 
>> /home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:345
>> #2  0x00007ffff5fa13b5 in llvm::DataLayout::clear (this=0x138) at 
>> /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:545
>> #3  0x00007ffff5f9f561 in llvm::DataLayout::reset (this=0x138, 
>> Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:179
>> #4  0x00007ffff60b25ca in llvm::Module::setDataLayout (this=0x0, 
>> Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/Module.cpp:377
>> #5  0x0000000000406c46 in main (argc=1, argv=0x7fffffffde68) at 
>> main.cc:95
>>
>>
>> Any idea?
>>
>> Frank
>>
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Mehdi Amini via llvm-dev

2016-Sep-14 17:05 UTC

head link

[llvm-dev] setDataLayout segfault

> On Sep 14, 2016, at 7:59 AM, Frank Winter via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> I get a segfault with this code when setting the data layout:
> 
> 
> 
> int main(int argc, char** argv)
> {
>  llvm::InitializeNativeTarget();
> 
>  llvm::LLVMContext TheContext;
>  unique_ptr<Module> Mod(new Module("A",TheContext));
> 
>  llvm::EngineBuilder engineBuilder(std::move(Mod));
>  std::string mcjit_error;
> 
>  engineBuilder.setMCPU(llvm::sys::getHostCPUName());
> 
>  engineBuilder.setEngineKind(llvm::EngineKind::JIT);
>  engineBuilder.setOptLevel(llvm::CodeGenOpt::Aggressive);
>  engineBuilder.setErrorStr(&mcjit_error);
> 
>  llvm::TargetOptions targetOptions;
>  targetOptions.AllowFPOpFusion = llvm::FPOpFusion::Fast;
>  engineBuilder.setTargetOptions( targetOptions );
> 
>  TargetMachine *targetMachine = engineBuilder.selectTarget();
> 
>  assert(targetMachine && "failed to create target
machine");
> 
>  std::cout <<
targetMachine->createDataLayout().getStringRepresentation() <<
"\n";
> 
>  Mod.get()->setDataLayout(
targetMachine->createDataLayout().getStringRepresentation() ); // this
segfaults
>  Mod.get()->setDataLayout( targetMachine->createDataLayout()  ); //
as well as this
> }
> 
> 
> Backtrace:
> 
> 
> Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".
> e-m:e-i64:64-f80:128-n8:16:32:64-S128
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char,
void>::end (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
> 117      iterator end() { return (iterator)this->EndX; }
> (gdb) bt
> #0  0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char,
void>::end (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
> #1  llvm::SmallVectorImpl<unsigned char>::clear (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:345
> #2  0x00007ffff5fa13b5 in llvm::DataLayout::clear (this=0x138) at
/home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:545
> #3  0x00007ffff5f9f561 in llvm::DataLayout::reset (this=0x138, Desc=...) at
/home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:179
> #4  0x00007ffff60b25ca in llvm::Module::setDataLayout (this=0x0,
The Module is a null pointer here.

— 
Mehdi

> #5  0x0000000000406c46 in main (argc=1, argv=0x7fffffffde68) at main.cc:95
> 
> 
> Any idea?
> 
> Frank
> 
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Mehdi Amini via llvm-dev

2016-Sep-14 17:09 UTC

head link

[llvm-dev] setDataLayout segfault

> On Sep 14, 2016, at 9:11 AM, Frank Winter via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> I am constructing the engine builder in the following way:
> 
> llvm::SMDiagnostic Err;
> unique_ptr<Module> Mod = getLazyIRFileModule("f.ll", Err,
TheContext);
> llvm::EngineBuilder engineBuilder(std::move(Mod));
> 
> However, after moving the pointer to the constructor it is no longer
retrievable from the unique_ptr object.
> 
> Mod.get()->dump();   // this segfaults after the move, but not before
> 
> So I conclude that any type of operation on the module is no longer valid.

Oh it seems you already figured, my previous email was not helpful :)

> 
> Am I constructing the engine builder as it is supposed to?
CC: +Lang

— 
Mehdi

> 
> 
> 
> On 09/14/2016 10:59 AM, Frank Winter via llvm-dev wrote:
>> I get a segfault with this code when setting the data layout:
>> 
>> 
>> 
>> int main(int argc, char** argv)
>> {
>>  llvm::InitializeNativeTarget();
>> 
>>  llvm::LLVMContext TheContext;
>>  unique_ptr<Module> Mod(new Module("A",TheContext));
>> 
>>  llvm::EngineBuilder engineBuilder(std::move(Mod));
>>  std::string mcjit_error;
>> 
>>  engineBuilder.setMCPU(llvm::sys::getHostCPUName());
>> 
>>  engineBuilder.setEngineKind(llvm::EngineKind::JIT);
>>  engineBuilder.setOptLevel(llvm::CodeGenOpt::Aggressive);
>>  engineBuilder.setErrorStr(&mcjit_error);
>> 
>>  llvm::TargetOptions targetOptions;
>>  targetOptions.AllowFPOpFusion = llvm::FPOpFusion::Fast;
>>  engineBuilder.setTargetOptions( targetOptions );
>> 
>>  TargetMachine *targetMachine = engineBuilder.selectTarget();
>> 
>>  assert(targetMachine && "failed to create target
machine");
>> 
>>  std::cout <<
targetMachine->createDataLayout().getStringRepresentation() <<
"\n";
>> 
>>  Mod.get()->setDataLayout(
targetMachine->createDataLayout().getStringRepresentation() ); // this
segfaults
>>  Mod.get()->setDataLayout( targetMachine->createDataLayout()  );
// as well as this
>> }
>> 
>> 
>> Backtrace:
>> 
>> 
>> Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".
>> e-m:e-i64:64-f80:128-n8:16:32:64-S128
>> 
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned char,
void>::end (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
>> 117      iterator end() { return (iterator)this->EndX; }
>> (gdb) bt
>> #0  0x00007ffff5f65832 in llvm::SmallVectorTemplateCommon<unsigned
char, void>::end (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:117
>> #1  llvm::SmallVectorImpl<unsigned char>::clear (this=0x148) at
/home/fwinter/svn/llvm-3.9/include/llvm/ADT/SmallVector.h:345
>> #2  0x00007ffff5fa13b5 in llvm::DataLayout::clear (this=0x138) at
/home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:545
>> #3  0x00007ffff5f9f561 in llvm::DataLayout::reset (this=0x138,
Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/DataLayout.cpp:179
>> #4  0x00007ffff60b25ca in llvm::Module::setDataLayout (this=0x0,
Desc=...) at /home/fwinter/svn/llvm-3.9/lib/IR/Module.cpp:377
>> #5  0x0000000000406c46 in main (argc=1, argv=0x7fffffffde68) at
main.cc:95
>> 
>> 
>> Any idea?
>> 
>> Frank
>> 
>> 
>> 
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

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