diff options
Diffstat (limited to 'vm/analysis.go')
| -rw-r--r-- | vm/analysis.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/vm/analysis.go b/vm/analysis.go new file mode 100644 index 000000000..411df5686 --- /dev/null +++ b/vm/analysis.go @@ -0,0 +1,20 @@ +package vm + +import "gopkg.in/fatih/set.v0" + +func analyseJumpDests(code []byte) (dests *set.Set) { + dests = set.New() + + for pc := uint64(0); pc < uint64(len(code)); pc++ { + 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 + + pc += a + case JUMPDEST: + dests.Add(pc) + } + } + return +} |