[cfe-dev] clang/llvm issue with compiling gcc

[John Smith]

Thanks, that worked. I submitted bug 10933


Regards,


John Smith.


On Thu, Sep 15, 2011 at 6:40 PM, Anna Zaks <ganna at apple.com> wrote:
> Hi John,
>
> Try replacing "-analyze" with "-E" and "-o /tmp/gcc/2011-09-15-1" with "-o c-common.i" in the command below. That should produce the pre-processed file called c-common.i in the current directory. You can double check that it's good by running:
>    $ clang --analyze c-common.i
> ,which should reproduce the problem.
>
> Thanks for tracking this down,
> Anna.
> On Sep 15, 2011, at 9:27 AM, John Smith wrote:
>
>> Hi,
>>
>>
>> Ok, so I ran scan-build with -v -v options, and got a whole lot of
>> output. I ran 'scan-build -v -v -o /tmp/gcc make' so i didnt specify a
>> parallel build. According to the screen output, it seems to freeze
>> while analyzing 'ANALYZE: ../.././gcc/c-common.c c_define_builtins'.
>>
>> I can reproduce the hang by running the exact same command line myself :
>>
>> /usr/local/bin/clang -cc1 -triple i386-pc-linux-gnu -analyze
>> -disable-free -main-file-name c-common.c -analyzer-store=region
>> -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume
>> -analyzer-checker=core -analyzer-checker=deadcode
>> -analyzer-checker=security -analyzer-checker=unix -analyzer-output
>> plist -w -mrelocation-model static -mdisable-fp-elim -masm-verbose
>> -mconstructor-aliases -target-cpu pentium4 -target-linker-version
>> 2.20.51.0.7 -momit-leaf-frame-pointer -resource-dir
>> /usr/local/bin/../lib/clang/3.0 -D IN_GCC -D HAVE_CONFIG_H -I . -I .
>> -I ../.././gcc -I ../.././gcc/. -I ../.././gcc/../include -I
>> ../.././gcc/../libcpp/include -I ../.././gcc/../libdecnumber -I
>> ../.././gcc/../libdecnumber/bid -I ../libdecnumber -Wno-long-long
>> -Wno-variadic-macros -Wno-overlength-strings -ferror-limit 19
>> -fmessage-length 0 -fdiagnostics-show-option
>> -analyzer-display-progress -analyzer-output=html -o
>> /tmp/gcc/2011-09-15-1 -x c ../.././gcc/c-common.c
>>
>> Now where do I find this 'pre-processed' file I need to submit the bug report ?
>>
>>
>> Regards,
>>
>>
>> John Smith.
>>
>>
>>
>>
>> On Tue, Sep 13, 2011 at 9:33 PM, Ted Kremenek <kremenek at apple.com> wrote:
>>> Hi John,
>>>
>>> It sounds like the analyzer is hanging on one of your files.
>>>
>>> Could suggestions for debugging:
>>>
>>> 1) Don't perform a parallel build.
>>>
>>> 2) Run scan-build with two extra -v -v options, which will show a very verbose log of information, including how clang is getting invoked for static analysis.
>>>
>>> Once you find the file that it is hanging on, please file a bug report with a preprocessed file that can be used to reproduce the issue.
>>>
>>> Cheers,
>>> Ted
>>>
>>> On Sep 13, 2011, at 12:25 PM, John Smith wrote:
>>>
>>>> Hi,
>>>>
>>>>
>>>> Im trying to run scan-build on GCC 4.5.3, and im running into the
>>>> following problem: Somewhere during the compilation, the process seems
>>>> to stall/freeze/hang/loop... whatever it's doing, it's not progressing
>>>> anymore.
>>>>
>>>> Im running into this issue using clang version 3.0 trunk 139148. I
>>>> didnt run into this problem when compiling the same version of gcc on
>>>> the same system when using either gcc (4.5.1), or an earlier version
>>>> of clang: v3.0 trunk rev. 131083 (or slightly earlier, dont have the
>>>> exact version). I didnt run into this issue when I ran with the same
>>>> version of scan-build on other c programs (yet ?) on the same system.
>>>> It doesnt seem to be a disk/cpu/ram shortage issue.
>>>>
>>>> According to 'top', 'clang' is eating up most of my cpu, but when
>>>> running strace on the pid, I get no output whatsoever. When running
>>>> strace on the 7 PID's running 'ccc-analyzer', most seem to be in
>>>> either 'wait' or 'waitpid'. Except for the ccc-analyzer that produced
>>>> the last output on my screen, wich seems to be stuck in 'read'. The 2
>>>> PID's of 'make' seem to be in wait and waitpid as well.
>>>>
>>>> I have no idea on how to start with problemshooting here. Any help is welcome.
>>>>
>>>>
>>>> Thanks in advance,
>>>>
>>>>
>>>> Regards,
>>>>
>>>>
>>>> John Smith.
>>>> _______________________________________________
>>>> cfe-dev mailing list
>>>> cfe-dev at cs.uiuc.edu
>>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>
>>>
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