diff options
Diffstat (limited to 'core/vm/analysis.go')
| -rw-r--r-- | core/vm/analysis.go | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/core/vm/analysis.go b/core/vm/analysis.go index 08415fc1e..e6a2df7b0 100644 --- a/core/vm/analysis.go +++ b/core/vm/analysis.go @@ -38,7 +38,7 @@ func (d destinations) has(codehash common.Hash, code []byte, dest *big.Int) bool m, analysed := d[codehash] if !analysed { - m = jumpdests(code) + m = codeBitmap(code) d[codehash] = m } return OpCode(code[udest]) == JUMPDEST && m.codeSegment(udest) @@ -61,9 +61,9 @@ func (bits *bitvec) codeSegment(pos uint64) bool { return ((*bits)[pos/8] & (0x80 >> (pos % 8))) == 0 } -// jumpdests creates a map that contains an entry for each -// PC location that is a JUMPDEST instruction. -func jumpdests(code []byte) []byte { +// jumpdests creates a bitmap of the code, where 1 represents a DATA-segment, +// and 0 represents code-segment +func codeBitmap(code []byte) []byte { //The map is 4 bytes longer than necessary, in case the code // ends with a PUSH32, the algorithm will push zeroes onto the // bitvector outside the bounds of the actual code. |