W. J. van der Laan cdf12c7b3d
Merge bitcoin/bitcoin#22895: consensus: don't call GetBlockPos in ReadBlockFromDisk without cs_main lock
350e034e64d175f3db4c85ddca42e76e279912f6 consensus: don't call GetBlockPos in ReadBlockFromDisk without lock (Jon Atack)

Pull request description:

  Commit ccd8ef65 "Reduce cs_main lock in ReadBlockFromDisk, only read GetBlockPos under the lock" in #11281 moved the cs_main lock from caller to `ReadBlockFromDisk()` for calling `CBlockIndex::GetBlockPos()`, but the second invocation doesn't have the lock, and IIUC there is no guarantee the compiler can know if state has changed.

  Use the `blockPos` local variable instead, rename it to `block_pos`, and make it const.

ACKs for top commit:
  laanwj:
    Code review ACK 350e034e64d175f3db4c85ddca42e76e279912f6
  theStack:
    Code-review ACK 350e034e64d175f3db4c85ddca42e76e279912f6
  promag:
    Code review ACK 350e034e64d175f3db4c85ddca42e76e279912f6.

Tree-SHA512: 0df0614ab1876885c85f7b53c604a759a29008da8027e95503b4726d2b820ec6d27546020c613337ff954406e01cb5d191978ba4a12124052fed6e1b0e9a226f
2021-09-16 17:00:54 +02:00
..
2021-06-22 11:06:30 +02:00

src/node/

The src/node/ directory contains code that needs to access node state (state in CChain, CBlockIndex, CCoinsView, CTxMemPool, and similar classes).

Code in src/node/ is meant to be segregated from code in src/wallet/ and src/qt/, to ensure wallet and GUI code changes don't interfere with node operation, to allow wallet and GUI code to run in separate processes, and to perhaps eventually allow wallet and GUI code to be maintained in separate source repositories.

As a rule of thumb, code in one of the src/node/, src/wallet/, or src/qt/ directories should avoid calling code in the other directories directly, and only invoke it indirectly through the more limited src/interfaces/ classes.

This directory is at the moment sparsely populated. Eventually more substantial files like src/validation.cpp and src/txmempool.cpp might be moved there.