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Merge pull request #21411 from holiman/fix_codelookup

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core/vm: avoid map lookups for accessing jumpdest analysis
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Péter Szilágyi 2020-08-06 08:09:15 +03:00 committed by GitHub
commit 4fde0cabc1
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1 changed files with 6 additions and 0 deletions
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6
core/vm/contract.go
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@ -112,7 +112,13 @@ func (c *Contract) validJumpSubdest(udest uint64) bool {
// isCode returns true if the provided PC location is an actual opcode, as
// opposed to a data-segment following a PUSHN operation.
func (c *Contract) isCode(udest uint64) bool {
// Do we already have an analysis laying around?
if c.analysis != nil {
return c.analysis.codeSegment(udest)
}
// Do we have a contract hash already?
// If we do have a hash, that means it's a 'regular' contract. For regular
// contracts ( not temporary initcode), we store the analysis in a map
if c.CodeHash != (common.Hash{}) {
// Does parent context have the analysis?
analysis, exist := c.jumpdests[c.CodeHash]