C/C++ serialization testing for Cyclone DDS

cxx-cdrtest.pl generates random types along with test code, writing:

• xxx-types.idl: the IDL file containing one or more topic definitions
• xxx.cpp: a C++ program that uses both the C and C++ language bindings to read and write data and to compare the contents

It additionally has to option of maintaining a database of types that have previously been generated and should not be generated again. If specified, it reads that file (evaling it, because it is a Dumper output with one type per line) before generating anything, and appends the newly generated types to it.

The script is a mess with some options:

• -a: annotate with @data_representation(XCDR2)
• -c FILE: aforemention database
• -i CNT: generate CNT random instances of each generated type instead of 50
• -l DEPTH: limit type generation depth to DEPTH instead of 10 (typedefs don't count)
• -n CNT: generate CNT types, defaults to 1 if -c given, else to 100

It can additionally be passed an initial seed. If started with the same database, passing the same seed will result in the same output. Hopefully.

Beware that compiling the output with many types can take a while (and some memory).

It has a table of likelihoods for the different types it can generate as well as whole bunch of workarounds to deal with (old) limitations of the IDL compiler and the serializers. Eventually they should all end up being 0; for now, do check if they are what you need.

cxx-cdrtest.bash is a wrapper that automates the process of generating random types, compiling the output and running it. If a test fails or crashes, it generates a zip file named failure-SEED.zip (where SEED is the seed used by the Perl script) containing all the generated sources (IDL, C++ and C).

It recognizes one special argument rebuild, which skips the step generating the IDL file and only compiles and runs the test. Any other argument is assumed to be a seed to be passed on to the Perl script.

It features some additional options:

• -r: repeat
• -k: if repeating, keep going after errors
• -Pc:PATH: Cyclone C is installed in PATH
• -Pcxx:PATH: Cyclone C++ is installed in PATH, or PATH is a C++ build directory that is a child of the C++ source repository
• -Piox:PATH: Iceoryx is installed in PATH (only relevant if Cyclone was compiled with Iceoryx support)

The defaults are probably not useful to anyone but me. It attempts to figure out the correct include and link paths from these with a few heuristics because of CMake/packaging nonsense.

YMMV.