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There are some mutable, global state variables that are currently reset by UnloadBlockIndex such as pindexBestHeader which should be cleaned up whenever the ChainstateManager is unloaded/reset/destructed/etc. Not cleaning them up leads to bugs like a use-after-free that happens like so: 1. At the end of a test, ChainstateManager is destructed, which also destructs BlockManager, which calls BlockManager::Unload to free all CBlockIndexes in its BlockMap 2. Since pindexBestHeader is not cleaned up, it now points to an invalid location 3. Another test starts to init, and calls LoadGenesisBlock, which calls AddToBlockIndex, which compares the genesis block with an invalid location 4. Cute puppies perish by the hundreds Previously, for normal codepaths (e.g. bitcoind), we relied on the fact that our program will be unloaded by the operating system which effectively resets these variables. The one exception is in QT tests, where these variables had to be manually reset. Since now ChainstateManager is no longer a global, we can just put this logic in its destructor to make sure that callers are always correct. Over time, we should probably move these mutable global state variables into ChainstateManager or CChainState so it's easier to reason about their lifecycles. |
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| .. | ||
| addressbooktests.cpp | ||
| addressbooktests.h | ||
| apptests.cpp | ||
| apptests.h | ||
| Makefile | ||
| rpcnestedtests.cpp | ||
| rpcnestedtests.h | ||
| test_main.cpp | ||
| uritests.cpp | ||
| uritests.h | ||
| util.cpp | ||
| util.h | ||
| wallettests.cpp | ||
| wallettests.h | ||