--- Day changed Fri Apr 22 2016
00:01 < wumpus> gmaxwell: that worked, thanks!
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00:04 < GitHub186> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/76176823ba6a...90653bc91d39
00:04 < GitHub186> bitcoin/master 5770449 Kaz Wesley: CBase58Data::SetString: cleanse the full vector...
00:04 < GitHub186> bitcoin/master 90653bc Wladimir J. van der Laan: Merge #7922: CBase58Data::SetString: cleanse the full vector...
00:05 < GitHub105> [bitcoin] laanwj closed pull request #7922: CBase58Data::SetString: cleanse the full vector (master...cleanse-fully) https://github.com/bitcoin/bitcoin/pull/7922
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00:16 < GitHub139> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/90653bc91d39...351abf9e0355
00:16 < GitHub139> bitcoin/master a4625ac Cory Fields: leveldb: integrate leveldb into our buildsystem...
00:16 < GitHub139> bitcoin/master 351abf9 Wladimir J. van der Laan: Merge #7911: leveldb: integrate leveldb into our buildsystem...
00:17 < GitHub133> [bitcoin] laanwj closed pull request #7911: leveldb: integrate leveldb into our buildsystem (master...leveldb-integration) https://github.com/bitcoin/bitcoin/pull/7911
00:17 < jonasschnelli> wumpus: https://github.com/bitcoin/bitcoin/pull/7911#issuecomment-212439612
00:17 < jonasschnelli> where is the DEFAULT_INCLUDES defined?
00:18 < wumpus> it's part of the automake system itself
00:20 < wumpus> the path to the config.h is added thre
00:22 < jonasschnelli> Okay. I see. Thanks.
00:24 < GitHub99> [bitcoin] laanwj opened pull request #7925: qt: Fix out-of-tree GUI builds (master...2016_04_qt_out_of_tree_build) https://github.com/bitcoin/bitcoin/pull/7925
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00:40 < phantomcircuit> this is without a doubt a terrible framework
00:40  * phantomcircuit goes back to the drawing board
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01:17 < phantomcircuit> first step in fuzzing serializer... use serializer
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01:49 < wumpus> yes, e.g. deserialize a block passed in on stdin, or a transaction, or network packet, or anything else
01:49 < wumpus> what is a terrible framework, afl? I found it a breeze to use, at least compared to previous, more academic instrumented fuzzing frameworks
01:50 < wumpus> no need to use a patched LLVM/clang etc a tleast
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02:00 < phantomcircuit> wumpus, no im trying to build a framework for doing this that does things like de-serializes a CScript object from stdin
02:08 < wumpus> oh right
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02:10 < phantomcircuit> wumpus, it's a pita
02:10 < phantomcircuit> it's 2016
02:10 < phantomcircuit> why can't i just do std::vector.pop<uint32_t>()
02:10 < phantomcircuit> :|
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02:14 < wumpus> I don't know, use a sane language instead of c++? :-)
02:15 < wumpus> c and derivatives are, in a way, like living in the 80's, with a few modern niceties bolted on in surprising and artful ways
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02:21 < phantomcircuit> wumpus, heh
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02:32 < GitHub197> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/351abf9e0355...f604bf63211f
02:32 < GitHub197> bitcoin/master f59dceb Wladimir J. van der Laan: qt: Fix out-of-tree GUI builds...
02:32 < GitHub197> bitcoin/master f604bf6 Wladimir J. van der Laan: Merge #7925: qt: Fix out-of-tree GUI builds...
02:32 < GitHub26> [bitcoin] laanwj closed pull request #7925: qt: Fix out-of-tree GUI builds (master...2016_04_qt_out_of_tree_build) https://github.com/bitcoin/bitcoin/pull/7925
02:34 < most> hi everyone. i'm currently playing around with the watch-only-feature to archive the balance of adresses. therefore i've used: importadress 1CC6eBM579riyXRVkrBtPtRcmy8C4mpqw2 "test" true
02:37 < most> after successfully rescanning the blockchain, i had look into the balance by using >>getbalance "test" 0 true<< and the balance differs to the one i've actually expected
02:37 < most> as >>listtransactions "test" 1000 0 true<< just show up all the received transactions, but not the send-related ones
02:39 < sipa> most: accounts are virtual bean counters that all share the same wallet coins... they don't have any relation to the blockchain
02:40 < sipa> most: the wallet does not have a way to give you a so-called address balance
02:40 < most> hmm, ok, so i have to get summarize the debits and credits by myself?
02:41 < sipa> it will show you sends and receives by using listtransactions
02:41 < sipa> if you specify an account name to listtransactions, it will only list transactions associated with that account
02:41 < wumpus> listunspent, with filter by address, can give you the unspent outputs, you can sum them up and get an 'address balance'. For whatever that's worth.
02:42 < most> yeah, i saw the sends in listtransactions, but the account-field equals to ""
02:42 < most> whereas in a received transaction the account-field states "test", which was the account i imported the address into
02:42 < wumpus> it usually indicates you're doing something wrong, like reusing addresses
02:42 < sipa> most: that's correct; sends are always associated with "" unless you use the sendfrom command
02:42 < sipa> most: again, accounts have nothing to do with the actual coins
02:43 < wumpus> better forget about using accounts, except as a convenient label for a group of addresses
02:44 < most> yeah, even as the "accounting-feature" is been dropped somewhere in the future
02:44 < wumpus> the account balance feature, apart from being deprecated, is not useful for what you're trying to do
02:44 < wumpus> right
02:45 < most> ok, so i will have a look into listunspend. thank you very much
02:47 < sipa> listunspent only gives you the remaining coins and their value
02:47 < sipa> not any history
02:47 < most> i guess for my purpose it should be fine
02:48 < wumpus> which is enough if you just want to compute the balance
02:48 < most> i'm just looking for current balance of an address
02:48 < wumpus> if you want the history per address you can look at listtranscations, and bucket per receiving address
02:50 < most> no, just the balance is fine. i'm regulary checking the balance. and if drops compared to the last one (which is stored in a db or somewhere else) i'll send a notice
02:54 < most> anyway, thanks for the help
02:56 < sipa> MarcoFalke: i'm not going to rebase until there has been more review, but i'll modify the last commit with your binascii/hex/bytes changes
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02:58 < GitHub82> [bitcoin] MarcoFalke closed pull request #7918: [qa] mininode: Use hexlify wrapper from util (master...Mf1604-qaMininodeHexlify) https://github.com/bitcoin/bitcoin/pull/7918
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03:17 < wumpus> jonasschnelli: Q: in your lmdb benchmarks, were you using a VM or otherwise a filesystem mounted from a file instead of block device? I'm seeing some very slow behavior, hanging for ages in fdatasync when I benchmark in a VM
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04:17 < jonasschnelli> wumpus: No. I was testing on a non-VM system with physical wired SSD.
04:17 < wumpus> ok
04:17 < jonasschnelli> Though I can give it a testrun on a VM on the same system.
04:17 < jonasschnelli> s/can/could
04:19 < sipa> wumpus: was your benchmark on an ssd?
04:19 < wumpus> jonasschnelli: not necessary, just trying to figure out what is different between your and gmaxwell's benchmark
04:20 < wumpus> sipa: I didn't time any full syncs with it
04:21 < sipa> here is a theory: lmdb uses mmap, and we use bulk writes often. this means that the OS can do a better job of scheduling the necessary writes to disk than the single-threaded, linear, synchronous approach used by leveldb
04:21 < sipa> if your latency for disk writes is low, that perhaps means that the benefit from lmdb is smaller
04:21 < wumpus> jonasschnelli: it would be interesting to see if in your case most time is also spent in fdatasync
04:21 < sipa> as on an ssd a random write isnas fast as a linear
04:22 < jonasschnelli> wumpus: how did you measure the time-spent-in-what-function? Did you add some benchmark logs or ran with a time profiler?
04:22 < wumpus> jonasschnelli: no, worse, just break into the debugger when I see it hangin the log
04:23 < wumpus> you can find out the same with a profiler, ofc :)
04:23 < jonasschnelli> hah. Okay. Yes.
04:23 < jonasschnelli> I think we should add a debug=lmbd in your branch.
04:23 < jonasschnelli> Otherwise this will be a myst forever
04:23 < wumpus> sipa: yes that sounds convincing 
04:28 < jonasschnelli> sipa: btw: the basic reindex with you new PR took ~24min. (2016-04-20 14:25:30 Reindexing block file blk00000.dat...  2016-04-20 14:49:28 Reindexing finished)
04:31 < jonasschnelli> But then I got "UpdateTips" untill 2016-04-20 19:05:21 (~4h15').
04:33 < wumpus> yes, that's the idea, it splits the reindex into two phases, which in total should be faster than the whole process was before
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04:35 < sipa> jonasschnelli: yes, that's expected... how long was a reindex beforehand?
04:36 < jonasschnelli> sipa: not sure. But somewhere around 5h IIRC (need to check the IRC logs).
04:36  * jonasschnelli checking logs...
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04:40 < jonasschnelli> can find it anymore.
04:40  * jonasschnelli checking the log
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10:07 < sipa> cfields: any problems getting the flag from travis?
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11:23 < GitHub6> [bitcoin] instagibbs opened pull request #7926: [RPC] push back getaddednodeinfo dead value (master...getaddedpushbackmaster) https://github.com/bitcoin/bitcoin/pull/7926
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14:09 < cfields> sipa: I never heard back this time. It was going too smoothly...
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15:29 < gmaxwell> sdaftuar: I have a patch that removes the feerate, and also takes it out of acceptmempool, but sipa would have killed me if I expanded the scope of that PR any further.
15:29 < gmaxwell> but as soon as that goes in I will PR it.
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16:09 < phantomcircuit> gmaxwell, is there anything wrong with this line https://github.com/pstratem/bitcoin-public/commit/7cb528af0fe0eea0f3219d280d7e3c043981f94a#diff-1db7f2ace9b759d046ca652e1465b95aR45
16:10 < phantomcircuit> it's doing crazy things when built against afl on fedora 23
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16:25 < gmaxwell> what does crazy things mean?
16:25 < gmaxwell> also, turn up warnings.
16:27 < phantomcircuit> gmaxwell, segfaults
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17:17 < sdaftuar> gmaxwell: hah, i made the same patch myself to see how big the changes were, then figured out that this must be exactly what sipa meant about the ever-expanding scope of that PR
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18:58 < gmaxwell> sdaftuar: I do feel kinda bad that it takes a mempool lock now several times for each transaction in the queue, but it's negligble. It could be easily optimized later, e.g. to have a function that took the set and populated a vector of {hash, depth, feerate} and dropped evicted transactions, all under a single lock acquisition. But that can be done another day...
18:58 < gmaxwell> the improvement from this for propagation of dependant transactions is really substantial, and I'd rather not delay it.
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22:44 < phantomcircuit> wumpus, currently have fuzzing of CDataStream >> CBlock working
22:45 < wumpus> great!
22:45 < phantomcircuit> i figured that would exercise the most of the serialization stuff in one go
22:46 < phantomcircuit> also discovered that combining std::copy with violation of the strict aliasing rule is a bad idea
22:46 < phantomcircuit> (on the latest gcc at least)
22:47 < gmaxwell> violating aliasing rules is always a bad idea. :)
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22:51 < phantomcircuit> gmaxwell, i wasn't expecting it to violate the rule though
22:51 < phantomcircuit> (and there's no warning about it)
22:51 < phantomcircuit> ie thought it was char*
22:52 < gmaxwell> ah, no you were copying a vector, no?
22:52 < phantomcircuit> copying from std::vector<char> to uint32_t*
22:52 < gmaxwell> yea... not quite. :)
22:52 < gmaxwell> Have you tried introducing a bug and verifying that it finds it?
22:53 < phantomcircuit> currently im trying to identify which exceptions i should catch as "that's expected"
23:06 < phantomcircuit> gmaxwell, huh memcpy is void*
23:06 < phantomcircuit> i guess this is *also* violating sa
23:11 < phantomcircuit> it seems like catching std::ios_base::failure is enough
23:12 < gmaxwell> phantomcircuit: it isn't the protype that can violate SA, its whats done inside, if you implemented your own memcpy and did your accesses via char pointers you'd be fine.
23:13 < phantomcircuit> gmaxwell, i wonder if glibc memcpy is char* internally or not
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23:22 < sipa> phantomcircuit: i assume it's written in asm :)
23:23 < gmaxwell> "lol"
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