[postgis-devel] PostGIS (actually liblwgeom) integration with oss-fuzz

[Even Rouault]

On jeudi 13 juillet 2017 18:20:09 CEST Regina Obe wrote:
> Even,
> 
> 
> 
> Thanks for the input.  I managed to create a docker build I could bash into
> using the oss-fuzz plain build and some logic I borrowed from strks
> postgis-docker.
> 
> 
> 
> I was able to get as far as:
> 
> 
> 
> cd fuzzers
> 
> make dummyfuzzers
> 
> and it generates /tmp/wkb_import_fuzzer and /tmp/wkt_import_fuzzer
> 

To be clear, you can also do that outside of the oss-fuzz docker environement and use your 
regular dev environment.

I rarely use the oss-fuzz Docker environement (just to check that the fuzzer programs work 
well when I create them) and never bash into it.

> That said, when trying to build with
> 
> CFLAGS="-fsanitize=undefined,address",
> 
> 
> 
> My configure just gives error
> 
> 
> 
> checking for gcc... gcc
> 
> checking whether the C compiler works... no
> 
> configure: error: in `/postgis-trunk':
> 
> configure: error: C compiler cannot create executables
> 
> See `config.log' for more details
> 

Works for me. Perhaps your gcc version is too old and doesn't support the sanitizers.

And to build the fuzzers with a liblwgeom built with the sanitizers, you also need to do:
CXXFLAGS="-fsanitize=undefined,address" make dummyfuzzers 

Note: I noticed that the *.sh scripts in fuzzers/ don't have execute permissions.
You need to
svn propset svn:executable on fuzzers/*.sh

Even

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