b4374436f3
nodeDB.querySeeds was not safe for concurrent use but could be called concurrenty on multiple goroutines in the following case: - the table was empty - a timed refresh started - a lookup was started and initiated refresh These conditions are unlikely to coincide during normal use, but are much more likely to occur all at once when the user's machine just woke from sleep. The root cause of the issue is that querySeeds reused the same leveldb iterator until it was exhausted. This commit moves the refresh scheduling logic into its own goroutine (so only one refresh is ever active) and changes querySeeds to not use a persistent iterator. The seed node selection is now more random and ignores nodes that have not been contacted in the last 5 days.
Ethereum Go
Official golang implementation of the Ethereum protocol
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develop | |
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Automated development builds
The following builds are build automatically by our build servers after each push to the develop branch.
Building the source
For prerequisites and detailed build instructions please read the Installation Instructions on the wiki.
Building geth requires two external dependencies, Go and GMP. You can install them using your favourite package manager. Once the dependencies are installed, run
make geth
Executables
Go Ethereum comes with several wrappers/executables found in
the cmd directory:
| Command | |
|---|---|
geth |
Ethereum CLI (ethereum command line interface client) |
bootnode |
runs a bootstrap node for the Discovery Protocol |
ethtest |
test tool which runs with the tests suite: /path/to/test.json > ethtest --test BlockTests --stdin. |
evm |
is a generic Ethereum Virtual Machine: evm -code 60ff60ff -gas 10000 -price 0 -dump. See -h for a detailed description. |
disasm |
disassembles EVM code: `echo "6001" |
rlpdump |
prints RLP structures |
Command line options
geth can be configured via command line options, environment variables and config files.
To get the options available:
geth help
For further details on options, see the wiki
Contribution
If you'd like to contribute to go-ethereum please fork, fix, commit and
send a pull request. Commits who do not comply with the coding standards
are ignored (use gofmt!). If you send pull requests make absolute sure that you
commit on the develop branch and that you do not merge to master.
Commits that are directly based on master are simply ignored.
See Developers' Guide for more details on configuring your environment, testing, and dependency management.