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authorFelix Lange <fjl@twurst.com>2016-10-04 18:36:02 +0800
committerFelix Lange <fjl@twurst.com>2016-10-06 21:32:16 +0800
commit1f1ea18b5414bea22332bb4fce53cc95b5c6a07d (patch)
treed1aa3051f9c4d9f33a24519c18b70f0dd2f00644 /miner
parentab7adb0027dbcf09cf75a533be356c1e24c46c90 (diff)
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core/state: implement reverts by journaling all changes
This commit replaces the deep-copy based state revert mechanism with a linear complexity journal. This commit also hides several internal StateDB methods to limit the number of ways in which calling code can use the journal incorrectly. As usual consultation and bug fixes to the initial implementation were provided by @karalabe, @obscuren and @Arachnid. Thank you!
Diffstat (limited to 'miner')
-rw-r--r--miner/worker.go6
1 files changed, 3 insertions, 3 deletions
diff --git a/miner/worker.go b/miner/worker.go
index ac1ef5ba3..e5348cef4 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -171,7 +171,7 @@ func (self *worker) pending() (*types.Block, *state.StateDB) {
self.current.receipts,
), self.current.state
}
- return self.current.Block, self.current.state
+ return self.current.Block, self.current.state.Copy()
}
func (self *worker) start() {
@@ -618,7 +618,7 @@ func (env *Work) commitTransactions(mux *event.TypeMux, txs *types.TransactionsB
}
func (env *Work) commitTransaction(tx *types.Transaction, bc *core.BlockChain, gp *core.GasPool) (error, vm.Logs) {
- snap := env.state.Copy()
+ snap := env.state.Snapshot()
// this is a bit of a hack to force jit for the miners
config := env.config.VmConfig
@@ -629,7 +629,7 @@ func (env *Work) commitTransaction(tx *types.Transaction, bc *core.BlockChain, g
receipt, logs, _, err := core.ApplyTransaction(env.config, bc, gp, env.state, env.header, tx, env.header.GasUsed, config)
if err != nil {
- env.state.Set(snap)
+ env.state.RevertToSnapshot(snap)
return err, nil
}
env.txs = append(env.txs, tx)