[dpdk-dev] C++ app does not execute DPDK constructors.
Sachin Jain
mail.sachin.jain at gmail.com
Mon Jan 6 22:24:36 CET 2020
Hi
*What am I trying to do?*
I am trying to write Gtests for my application based on DPDK.
*Details about the app:*
The application compiles dpdk as static library. Its a pretty simple. For
now it just runs a dummy Gtest and create a memory pool. The key is, its a
C++ file. I see no issue if it were a C app.
*Issue I am facing:*
The call to rte_mempool_create fails() with "Err: No such file or
directory".
*More debugging:*
The reason for the above failure is, the constructor for the ring driver is
not getting called. Specifically below code in
~/driver/mempool/ring/rte_mempool_ring.c.
MEMPOOL_REGISTER_OPS(ops_mp_mc);
MEMPOOL_REGISTER_OPS(ops_sp_sc);
MEMPOOL_REGISTER_OPS(ops_mp_sc);
MEMPOOL_REGISTER_OPS(ops_sp_mc);
So when I look at the C app which has these constructors called, I see the
init_array size to be much larger than the the C++ app. Considering the two
code are almost identical, I don't know what am I missing to have these
constructors run. They are definitely getting compiled but are not called.
*What have I tried:*
1. I tried the --whole-archive LD option but I dont think that should play
a part here since the constructors does get called with C app.
Any suggestions?
Regards
Sachin.
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