plugeth/core/vm/analysis.go

21 lines
576 B
Go
Raw Normal View History

2014-11-04 17:17:38 +00:00
package vm
import "gopkg.in/fatih/set.v0"
2014-11-04 17:17:38 +00:00
func analyseJumpDests(code []byte) (dests *set.Set) {
dests = set.New()
2014-11-04 17:17:38 +00:00
for pc := uint64(0); pc < uint64(len(code)); pc++ {
2014-11-04 17:17:38 +00:00
var op OpCode = OpCode(code[pc])
switch op {
case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
a := uint64(op) - uint64(PUSH1) + 1
2014-11-04 17:17:38 +00:00
pc += a
case JUMPDEST:
dests.Add(pc)
2014-11-04 17:17:38 +00:00
}
}
return
}