[LLVMdev] debugging LLVM generated executables???

[Owen Anderson]

I think you probably need to pass -O0 to llvm-ld.  The link-time  
optimizations are probably killing your debug info.

--Owen

On May 5, 2008, at 8:21 PM, Mark Oskin wrote:

> Hi everyone again,
>
> I did discover the following works (see below).  However, does anyone
> know of the "proper" way with LLVM?
>
> llvm-gcc -g -c -emit-llvm helloworld.c
> opt -load=mypass.dylib -mypass < helloworld.o > helloworld-mypass.o
> llc -fast -f -o helloworld.s helloworld-mypass.o
> as -o helloworld-prime.o
> gcc -o helloworld helloworld-prime.o
> gdb helloworld
>
> On May 5, 2008, at 4:17 PM, Mark Oskin wrote:
>
>> Hi everyone,
>>
>> I have a question that seems simple, but has been confounding me for
>> several hours.  I'd like to debug a binary produced with LLVM.  For
>> the life of me, I can't get any symbols into gdb and llvm-db won't
>> even start the program nor load any useful information about it.
>> Here's my current strategy (which isn't working):
>>
>> llvm-gcc -g -O0 -c -emit-llvm helloworld.c
>> opt -load=mypass.dylib -mypass < helloworld.o > helloworld-mypass.o
>> llvm-ld -native -o helloworld helloworld-mypass.o
>> gdb helloworld
>>
>> I've tried several variations on the above.
>>
>> Any suggestions?
>>
>> Note, what is critical about the whole thing is I must run "mypass"  
>> on
>> the bytecode file.  I'm hoping there's an easy fix, that will both
>> allow me to run my arbitrary pass, and debug a program.
>>
>> thanks,
>>
>> -Mark
>> _______________________________________________
>> 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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4260 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20080505/73986ba0/attachment.bin>