If two create_block_template are called at nearly the same time,
and a block is added at nearly the same time, this could happen:
- the blockchain top block is B0
- thread 1 enters create_block_template, takes blockchain lock
- thread 1 creates a fresh block referencing prev block B0
- thread 1 releases blockchain lock
- thread 0 adds a new block
- thread 0 enters create_block_template
- thread 0 updates block template
- thread 1 takes txpool lock and continues creating block template
- thread 1 overwrites block template with previous data
993a1994 tests: add a CNv4 JIT test (moneromooo-monero)
736f2579 crypto: plug CNv4 JIT into cn_slow_hash (moneromooo-monero)
2e9b988a crypto: clear cache after generating random program (moneromooo-monero)
683c3d13 performance_tests: add tests for new Cryptonight variants (moneromooo-monero)
32ebc95d CMakeLists.txt: detect and use -pthread compiler flag (moneromooo-monero)
be2d061b miner: fix build with boost 1.69 (moneromooo-monero)
1de62cb1 mlocker: fix access to global lock map after dtor on exit (moneromooo-monero)
5544bb83 mlocker: fix dtor ordering problem (moneromooo-monero)
Minimalistic JIT code generator for random math sequence in CryptonightR.
Usage:
- Allocate writable and executable memory
- Call v4_generate_JIT_code with "buf" pointed to memory allocated on the previous step
- Call the generated code instead of "v4_random_math(code, r)", omit the "code" parameter
- These functions are declared twice in slow-hash.c. Remove one of the copies.
- The declarations have the wrong return type, should be void, not int.
Function definitions here: 1e74586ee9/src/crypto/aesb.c (L151-L180)
Test plan: make release-test
The change made for v2 broke v1, and we have no way to know which
version we're serializing here. However, since we don't actually
care about space savings in this case, we continue serialiazing
both mask and amount.
The 10 minute one will never trigger for 0 blocks, as it's still
fairly likely to happen even without the actual hash rate changing
much, so we add a 20 minute window, where it will (for 0 blocks)
and a one hour window.
