[scan-build] [Patch] Compiler call interceptor for Linux

[Laszlo Nagy]

Interesting approach you have showed Aleksei. I had a similar problem, but
approached it differently... I wrote a program which intercept the compiler
calls and generate a compilation database. (you can generate it from cmake
files) That tool is called bear <https://github.com/rizsotto/Bear>, and it
works on linux/FreeBSD/OS X as well... And with the rewrite of scan-build
wanted to extend the current functionality to use the compilation database
(beside to work with the current environment based approach)... At this
moment I still work on the ccc-analyzer implementation in python... Алексей
Климов and Sylvestre Ledru in the frame of a GSoC also wanted to rewrite
the scan-build part.


On Tue, May 13, 2014 at 6:01 PM, Jordan Rose <jordan_rose at apple.com> wrote:

> [+cfe-commits again, -cfe-dev]
>
> Interested yes, but unfortunately not all of the people involved in the
> analyzer are using Linux systems. (I'm on OS X.) I've CC'd a few other
> recent contributors to the analyzer, but I can't remember if they are
> familiar with and have access to Linux systems either. (Laszlo in
> particular is attempting to rewrite scan-build in Python, for more
> uniformity with the rest of LLVM, so this is the sort of thing he'd want to
> stay up-to-date about.)
>
> Sorry for not being so responsive here,
> Jordan
>
>
> On May 13, 2014, at 8:47 , Aleksei Sidorin <a.sidorin at samsung.com> wrote:
>
> > Hello again,
> >
> > I sent a message to cfe-commits mailing list, but nobody answered. This
> task is listed in open projects. Is anybody interested in this interceptor?
> >
> > Link to review: http://reviews.llvm.org/D3608
> >
> > 29.04.2014 09:38, Aleksei Sidorin:
> >> Hello,
> >>
> >> This patch enables interception of compiler calls without replacement
> of environment variables. It uses strace (v.4.8) to compute root directory
> of processes (in case of chroot), working directory, process name and its
> environment variables and tries to guess some header directories. This
> approach works well with Android and some build systems like OBS (local
> build with osc client) and GBS (checked on Tizen). This behaviour can be
> enabled with --use-interceptor option. If this option is not specified, old
> behaviour is used (this patch was made to not break it).
> >>
> >> Interceptor uses process pool to analyze multiple files at a time. Pool
> size can be specified with NUM_PROCESSES environment variable. Default pool
> size is a number of processors.
> >>
> >> If we have a trace of build (that may be created with `strace -f -v -s
> 1000000 -o $trace_file_name -e trace=vfork,fork,clone,execve,chdir,chroot
> -e signal= $build_cmd`), it can be passed via TRACE_FILE environment
> variable. This will not launch parallel build (analysis only). If option is
> not specified, temporary pipe is used, analyzer and compiler are executed
> in parallel.
> >>
> >> -additional-arg option was also added to pass additional parameters to
> analyzer. Sometimes scan-build cannot determine all required parameters if
> some custom toolchain is used.
> >>
> >> Interceptor was tested on Ubuntu 12.04 and 14.04 with strace 4.8.
> Strace v.4.6 is known to have some issues with interception of gcc.
> >>
> >
> >
> > --
> > Best regards,
> > Aleksei Sidorin
> > Software Engineer,
> > IMSWL-IMCG, SRR, Samsung Electronics
> >
>
>
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