[lldb-dev] just me, or lldb 3.4 is very buggy?
Jun Koi
junkoi2004 at gmail.com
Fri Jan 31 08:56:57 PST 2014
On Sat, Feb 1, 2014 at 12:53 AM, Todd Fiala <tfiala at google.com> wrote:
> Very helpful, thanks Andrew.
>
> Jun - seems much more likely this is related to the 32-bit rather than the
> Ubuntu 13.10 part. (I am still building the latest lldb on Ubuntu 13.10
> right now, but it is a 64-bit version).
>
> I'll eventually need 32-bit working on Ubuntu if lldb goes into the
> Android AOSP tree and if we still use 32-bit host tools, so I'll have a
> look at what's up with that.
>
> Any chance you can move to 64 bit in the meantime, Jun?
>
yes i can if there is no alternative, but i would not want to do that if
32bit works for me.
so please support 32bit lldb, as it is still the main environment for lots
of people.
thanks,
Jun
>
>
> On Fri, Jan 31, 2014 at 8:46 AM, Andrew MacPherson <andrew.macp at gmail.com>wrote:
>
>> Hi guys,
>>
>> I notice that Jun is on 32-bit and I can also confirm that I haven't
>> found it possible to get lldb working under 32-bit Linux. LLDB can't
>> currently be compiled with clang right now due to this issue:
>>
>> http://llvm.org/bugs/show_bug.cgi?id=18311
>>
>> And compiling with gcc (4.8.1 in my case) results in this assertion
>> failure when trying to debug anything:
>>
>> http://llvm.org/bugs/show_bug.cgi?id=17802
>>
>> Hope that helps,
>> Andrew
>>
>>
>>
>> On Fri, Jan 31, 2014 at 5:30 PM, Todd Fiala <tfiala at google.com> wrote:
>>
>>> Here's what I'm seeing on Ubuntu 12.04 x86_64 (I'll hop over to Ubuntu
>>> 13.10 in a moment to see what it shows), using gcc 4.8.2:
>>>
>>> Here is my hello.c:
>>>
>>> #include <stdio.h>
>>>
>>> int main(int argc, char **argv)
>>> {
>>> printf("Hello, world\n");
>>> return 0;
>>> }
>>>
>>> Here is the output from compiling and running lldb:
>>>
>>> tfiala at tfiala2:~/lldb/samples/hello$ gcc -g -O0 -o hello hello.c
>>> tfiala at tfiala2:~/lldb/samples/hello$ ./hello
>>> Hello, world
>>> # the following is my top of tree build from lldb as of about 12 hours
>>> ago
>>> tfiala at tfiala2:~/lldb/samples/hello$
>>> ~/lldb/svn/lgs/build2/Debug+Asserts/bin/lldb
>>> (lldb) target create ./hello
>>> Current executable set to './hello' (x86_64).
>>> (lldb) b main
>>> Breakpoint 1: where = hello`main + 15 at hello.c:5, address =
>>> 0x00000000004004df
>>> (lldb) r
>>> Process 11433 launching
>>> Process 11433 stopped
>>> * thread #1: tid = 11433, 0x00007faad38206b0, name = 'hello', stop
>>> reason = trace
>>> frame #0: 0x00007faad38206b0
>>> -> 0x7faad38206b0: movq %rsp, %rdi
>>> 0x7faad38206b3: callq 0x7faad3824010
>>> 0x7faad38206b8: movq %rax, %r12
>>> 0x7faad38206bb: movl 0x2215ff(%rip), %eax
>>> (lldb) Process 11433 launched: './hello' (x86_64)
>>> Process 11433 stopped
>>> * thread #1: tid = 11433, 0x00000000004004df hello`main(argc=1,
>>> argv=0x00007fffa93f3ba8) + 15 at hello.c:5, name = 'hello', stop reason =
>>> breakpoint 1.1
>>> frame #0: 0x00000000004004df hello`main(argc=1,
>>> argv=0x00007fffa93f3ba8) + 15 at hello.c:5
>>> 2
>>> 3 int main(int argc, char **argv)
>>> 4 {
>>> -> 5 printf("Hello, world\n");
>>> 6 return 0;
>>> 7 }
>>> (lldb)
>>>
>>> I'll try it on Ubuntu 13.10 x86_64 next. That one will be with a stock
>>> system + packages for build-essential, libedit-dev, libpython-dev and swig
>>> (I think that's it).
>>>
>>> -Todd
>>>
>>>
>>> On Fri, Jan 31, 2014 at 8:23 AM, Jun Koi <junkoi2004 at gmail.com> wrote:
>>>
>>>>
>>>>
>>>>
>>>> On Sat, Feb 1, 2014 at 12:19 AM, Todd Fiala <tfiala at google.com> wrote:
>>>>
>>>>> Hi Jun,
>>>>>
>>>>> Thanks again for the report.
>>>>>
>>>>> I'm hopping over to Ubuntu 13.10 and will have a look at this. It
>>>>> would definitely be helpful to know a few things (which I'm going to have
>>>>> to guess about here):
>>>>> * What compiler are you using? gcc or clang?
>>>>>
>>>>
>>>> i am using default CC, which is gcc
>>>>
>>>>
>>>>> * What flags did you pass to the compiler when you compiled? Was it a
>>>>> debug build? Was it optimized?
>>>>>
>>>>>
>>>> it is also default compiler option. for example, with helloworld.c
>>>> program, i simply compiled it with (without Makefile):
>>>>
>>>> $ make helloworld
>>>>
>>>>
>>>>
>>>>> I'll file a bug if I'm able to cause a seg fault. Yesterday I had a
>>>>> check-in that fixed a seg fault under Linux - not sure if that's something
>>>>> you were hitting.
>>>>>
>>>>>
>>>> I'll post what I see.
>>>>>
>>>>>
>>>> awesome, please keep us updating!
>>>>
>>>> thanks,
>>>> Jun
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Jan 30, 2014 at 7:00 AM, Jun Koi <junkoi2004 at gmail.com> wrote:
>>>>
>>>>> hi,
>>>>>
>>>>> i got lldb 3.5 from llvm.org/apt, and it is a bit better: it no
>>>>> longer has issue with libedit, it seems.
>>>>>
>>>>> however, it crashes all the time. you can easily reproduce it like
>>>>> below:
>>>>>
>>>>> $ lldb-3.5 ./test
>>>>> Current executable set to './test' (i386).
>>>>> (lldb) b main
>>>>> Breakpoint 1: where = test`main, address = 0x0804847d
>>>>> (lldb) r
>>>>> Segmentation fault (core dumped)
>>>>>
>>>>>
>>>>> "test" can be any program. in my case, it is just a "hello world"
>>>>> program, written in C.
>>>>>
>>>>> again, this is on Ubuntu 13.10 32bit. please try it, and confirm this
>>>>> is indeed a bug.
>>>>>
>>>>> at this current status, lldb is really unusable :-((
>>>>>
>>>>> thanks.
>>>>> Jun
>>>>>
>>>>>
>>>>>
>>>>> On Thu, Jan 30, 2014 at 2:06 AM, Todd Fiala <tfiala at google.com> wrote:
>>>>>
>>>>>> Hi Jun,
>>>>>>
>>>>>> Could you file a bug here<http://llvm.org/bugs/enter_bug.cgi?product=lldb>and attach your source? Include how you compile it so we make sure we're
>>>>>> all on the same page to reproduce it. Then we can see what's going on.
>>>>>>
>>>>>> Thanks for reporting it!
>>>>>>
>>>>>> Sincerely,
>>>>>> Todd Fiala
>>>>>>
>>>>>>
>>>>>> On Wed, Jan 29, 2014 at 6:48 PM, Sylvestre Ledru <
>>>>>> sylvestre at debian.org> wrote:
>>>>>>
>>>>>>> On 29/01/2014 09:42, Greg Clayton wrote:
>>>>>>> > You will need to update the installed libedit on your machine.
>>>>>>> "libedit" is the line reader program we use to get commands and the default
>>>>>>> version on most linux's is quite old and out of date.
>>>>>>> >
>>>>>>> >
>>>>>>> Ubuntu saucy (13.10) has libedit v3.1-20130712. Not sure it is the
>>>>>>> issue here...
>>>>>>>
>>>>>>> Sylvestre
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> lldb-dev mailing list
>>>>>>> lldb-dev at cs.uiuc.edu
>>>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
>>>>>>
>>>>>> _______________________________________________
>>>>>> lldb-dev mailing list
>>>>>> lldb-dev at cs.uiuc.edu
>>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
>>>>
>>>>
>>>
>>>
>>> --
>>> Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
>>>
>>> _______________________________________________
>>> lldb-dev mailing list
>>> lldb-dev at cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>>>
>>>
>>
>
>
> --
> Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
>
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