[LLVMdev] Debugging of LLVM-IR

Daniel Dunbar daniel at zuster.org
Thu Feb 11 09:48:02 PST 2010


Have you tried using 'lli' with --force-interpreter? Then you can step
through the interpreter line by line, which is sort of liking stepping
through the IR line by very-slow-line. :)

 - Daniel

On Tue, Feb 9, 2010 at 10:49 AM, Sebastian Schlunke
<schlunki at cs.tu-berlin.de> wrote:
> I suspected something like that.  :(
>
> I was hoping i could run the program and step throught IR-Code line by line, maybe even have a look at the variables.
>
> Well, what about compiling it into assembler-code. Is there any way to know which IR-line generated which assembler line(s)? (I do not need any optimizations or whatever, if that helps...)
>
> Sebastian
>
> On Tuesday 09 February 2010 18:45:56 you wrote:
>> Unfortunately, the current gdb support doesn't include line numbers.
>> It'll tell you what function it crashed in and the stack trace though.
>>
>> Line numbers will probably come when the llvm-mc project is merged into the JIT.
>>
>> On Tue, Feb 9, 2010 at 9:37 AM, Garrison Venn <gvenn.cfe.dev at gmail.com> wrote:
>> > Are you running this in a JIT? If so this will help: http://llvm.org/docs/DebuggingJITedCode.html.
>> >
>> > Garrison
>> >
>> > On Feb 9, 2010, at 10:33, Sebastian Schlunke wrote:
>> >
>> >> Hello,
>> >>
>> >> is there any way to debug a program in LLVM-IR line-by-line (i.e. with gdb)?
>> >>
>> >> The problem is, i have a program in human-readable-intermediate representation that segfaults, when executed. I want to know, which line in the IR causes this.
>> >>
>> >> Any help is appreciated.
>> >>
>> >> Best regards,
>> >> Sebastian
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>> >
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