llvm dev - Dec 2008 - [LLVMdev] Getting the start and end address of JITted code

Folks,

Is anyone else the failure below?

On Mac OS X everything builds properly...

Thanks for any help,

snaroff

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Fresh checkout, project generated using cmake, same error.
Look like something in llvmAsmParser.y that it does not like.

llvmAsmParser.y(1275) : error: 'NoCapture' : is not a member of  
'llvm::Attribute'
llvmAsmParser.y(1275) : error: 'NoCapture' : undeclared identifier.


Le 17 déc. 08 à 14:27, steve naroff a écrit :
> Folks,
>
> Is anyone else the failure below?
>
> On Mac OS X everything builds properly...
>
> Thanks for any help,
>
> snaroff
>
> <Picture 27.png>_______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Got it.

On Mac OS, the build process update the llvmAsmParser.cpp.cvs file,  
and then generate llvmAsmParser.cpp from the .cvs file.
But on Window, it does not update the .cvs files (probably because  
bison is missing), and so, the llvmAsmParser.cpp is not in sync with  
the .y file.

As the Mac OS build process update the cvs files, commiting them after  
building on OS X should be enough to solve the issue.

Le 17 déc. 08 à 14:27, steve naroff a écrit :
> Folks,
>
> Is anyone else the failure below?
>
> On Mac OS X everything builds properly...
>
> Thanks for any help,
>
> snaroff
>
> <Picture 27.png>_______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Here's my problem, which I raised on IRC:

JIT::getPointerToFunction gets the address of the start of a function.
But how do I find out where the end of the function is?  I need this
to register the function for profiling.

varth said: aph, you need to intercept the "endFunctionBody" call on
the memory manager, it will tell you the start pointer and the end
pointer

But how can I do this?  The obvious way would be for me to inherit
from DefaultMemoryManager and pass an instance of my class to
ExecutionEngine::createJIT.  But DefaultMemoryManager isn't public so
I can't inherit from it.  It's not at all obvious to me how I'm
supposed to intercept endFunctionBody.

Thanks,
Andrew.

Sounds like this has to do with Bill backing out r61019, r61030, and  
r61040. I think 61031 (which update llvmAsmParser.cpp.cvs, etc.)  
should be backed out as well. Can someone do that?

Evan

On Dec 17, 2008, at 7:20 AM, Jean-Daniel Dupas wrote:
> Got it.
>
> On Mac OS, the build process update the llvmAsmParser.cpp.cvs file,
> and then generate llvmAsmParser.cpp from the .cvs file.
> But on Window, it does not update the .cvs files (probably because
> bison is missing), and so, the llvmAsmParser.cpp is not in sync with
> the .y file.
>
> As the Mac OS build process update the cvs files, commiting them after
> building on OS X should be enough to solve the issue.
>
> Le 17 déc. 08 à 14:27, steve naroff a écrit :
>
>> Folks,
>>
>> Is anyone else the failure below?
>>
>> On Mac OS X everything builds properly...
>>
>> Thanks for any help,
>>
>> snaroff
>>
>> <Picture 27.png>_______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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Hi Andrew,

Andrew Haley wrote:
> Here's my problem, which I raised on IRC:
>
> JIT::getPointerToFunction gets the address of the start of a function.
> But how do I find out where the end of the function is?  I need this
> to register the function for profiling.
>
> varth said: aph, you need to intercept the "endFunctionBody" call
on
> the memory manager, it will tell you the start pointer and the end
> pointer
>   
Yep, that's what I said :)
> But how can I do this?  The obvious way would be for me to inherit
> from DefaultMemoryManager and pass an instance of my class to
> ExecutionEngine::createJIT.  
Correct.
> But DefaultMemoryManager isn't public so
> I can't inherit from it.  
You should inherit from JITMemoryManager.
> It's not at all obvious to me how I'm
> supposed to intercept endFunctionBody.
>
>   
Here's how vmkit does it:

class MvmMemoryManager : public JITMemoryManager {
 
  /// realMemoryManager - The real allocator
  JITMemoryManager* realMemoryManager;

public:
 
  MvmMemoryManager() : JITMemoryManager() {
    realMemoryManager = JITMemoryManager::CreateDefaultMemManager();
  }


And MvmMemoryManager redefines all the virtual functions to call the 
real memory manager. For endFunctionBody, it inserts in a map the start 
and end pointers.

Good luck!

Nicolas
> Thanks,
> Andrew.
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>