Ugh, what an unfortunate oversight! The good news is that this issue should be solved in future versions when we switch to the new libsecp256k1 lib for validation.
For now, I've thrown together a quick hack to allow a user-specifiable callback for libbitcoinconsensus. I think it's not worth messing with the official API since it will be fixed soon, but rather hacked in as a temporary work-around as needed. It _should_ be documented as an issue with the current version, though. Please see here for a work-around to try: https://github.com/theuni/bitcoin/commits/openssl-consensus-threads Unfortunately it's not pretty, but it works fine here. Note that you should give this some _serious_ testing before deploying in any real way. It should mimic the way we do it in Core, though. That's on top of current master, but it should be trivial to apply to release tags. Please let me know how it works out. Regards, Cory On Fri, Aug 14, 2015 at 12:37 PM, Tamas Blummer via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote: > We integrated libconsensus into bits of proof. It works well, in-line for all > test cases with our Java engine and is about 50% faster on a single thread. > > The performance advantage unfortunatelly reverses if libconsensus is executed > on several threads simultaneously as we do with the Java engine, since an > error: > > Assertion failed: (pkey != NULL), function CECKey, file > ecwrapper.cpp, line 96. > > arises under that stress. > > I guess that the cause is that thread callbacks as advised for OpenSSL on > https://www.openssl.org/docs/crypto/threads.html are not registered. > Registering those however would require access to OpenSSL functions, not > exported from the lib. > > I’d be thankful for a pointer to a workaround. > > Tamas Blummer > > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev > _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
