Make -checkmempool=1 not fail through int32 overflow #6896
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| @@ -360,7 +360,7 @@ class CTxMemPool | |||
| * check does nothing. | |||
| */ | |||
| void check(const CCoinsViewCache *pcoins) const; | |||
| void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = dFrequency * 4294967296.0; } | |||
| void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = dFrequency * 4294967295.0; } | |||
There was a problem hiding this comment.
Any reason not to cast explicitly?
std::static_cast<int>(dFrequency * 4294967295.0)?
IMHO it might have made this more obvious to reviewers.
There was a problem hiding this comment.
Agree w/ @dcousens
Additionally, raw big numbers with no explanation comment should be avoided. I know it's 2^32 but it's not immediately obvious to every code reader.
This should be uint_max-1 and getdouble() should be similar.
|
ACK |
|
Oops. |
|
@laanwj I think the issue was that it would overflow to 0. In any case, a range check would be sane. |
|
Isn't any overflow an issue? |
|
Right now it doesn't appear overflow as currently used(post-fix), but probably a good idea to internally check. |
|
Apparently a range clamp is already done in init.cpp. That's good enough, going to merge this. |
laanwj
added a commit
that referenced
this pull request
Oct 30, 2015
e9e6163 Make -checkmempool=1 not fail through int32 overflow (Pieter Wuille)
1 task
furszy
added a commit
to PIVX-Project/PIVX
that referenced
this pull request
Jun 14, 2020
2105947 Implement helper class for CTxMemPoolEntry constructor (Alex Morcos) 1cef905 Make -checkmempool=1 not fail through int32 overflow (Pieter Wuille) 0f72ff2 Support -checkmempool=N, which runs checks on average once every N transactions (Pieter Wuille) 89483d0 [Bug] Make operator() a const function in CompareTxMemPoolEntryByX (random-zebra) a50ad77 Lower default policy limits (random-zebra) 03f7152 fix locking issue with new mempool limiting (random-zebra) 1598961 Fix stale comment in CTxMemPool::TrimToSize. (random-zebra) 98d0d68 Undo GetMinFee-requires-extra-call-to-hit-0 (random-zebra) 6ad6ee6 Add reasonable test case for mempool trimming (random-zebra) 8dcbb7e Only call TrimToSize once per reorg/blocks disconnect (random-zebra) c20cd38 Implement on-the-fly mempool size limitation. (random-zebra) aee2e17 Print mempool size in KB when adding txn (random-zebra) f7c85fd Add CFeeRate += operator (random-zebra) 5bd2a00 Track (and define) ::minRelayTxFee in CTxMemPool (random-zebra) 0b50f6c Add Mempool Expire function to remove old transactions (random-zebra) d26f5e0 Fix calling mempool directly, instead of pool, in ATMP (random-zebra) fc5eddb Reverse the sort on the mempool's feerate index (random-zebra) 0ce1df0 [BUG] Fix CTxMemPool::check excluding zerocoins from children checks (random-zebra) 1f7bd52 Track transaction packages in CTxMemPoolEntry (random-zebra) 1fd406b TxMemPool: Change mapTx to a boost::multi_index_container (random-zebra) Pull request description: built on top of - [x] #1645 This PR pulls some updates from upstream in the mempool area, adding the required adjustments for legacy zerocoin txes and updating the functional test suite. Specifically, here we: - track mempool descendants (in-mempool transactions that depend on other mempool transactions) - turn `mapTx` into a `boost::multi_index_container` that sorts the mempool on 3 criteria: - transaction hash - fee rate - time in the mempool - Add a max size for the mempool (throwing away the cheapest txs and bumping the min relay fee, when full) - Implement on-the-fly mempool size limit with the flag `-maxmempool` - Implement `-checkmempool=N` to customize the frequency of the mempool check - Implement helper for `CTxMemPoolEntry` for the unit tests. Backports: - bitcoin#6654 - bitcoin#6722 [`*`] - bitcoin#6889 - bitcoin#6771 - bitcoin#6776 - bitcoin#6896 - bitcoin#7020 [`*`] excluding bitcoin@9e93640 as our default minimum tx fee rate of 10k satoshis is only 0,00003 USD at the time of writing. ACKs for top commit: Fuzzbawls: utACK 2105947 furszy: Re utACK 2105947 and merging this nice upgrade :) . Tree-SHA512: 51a7d75bd52f7646d461252c78f0dd9d7e8b5c1c66c22944120bfe293b28f5d48135de339ebf3d8a5b4c61ca5452383ed1b10c417be06dc4a335ac645842ea14
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fix a bug in #6776 discovered by @gmaxwell: -checkmempool=1 causes the internal 32-bit variable to overflow to zero.