1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
package vm
import (
"fmt"
"github.com/ethereum/go-ethereum/params"
"math/big"
)
var (
GasQuickStep = big.NewInt(2)
GasFastestStep = big.NewInt(3)
GasFastStep = big.NewInt(5)
GasMidStep = big.NewInt(8)
GasSlowStep = big.NewInt(10)
GasExtStep = big.NewInt(20)
GasReturn = big.NewInt(0)
GasStop = big.NewInt(0)
GasContractByte = big.NewInt(200)
)
func baseCheck(op OpCode, stack *stack, gas *big.Int) error {
// PUSH and DUP are a bit special. They all cost the same but we do want to have checking on stack push limit
// PUSH is also allowed to calculate the same price for all PUSHes
// DUP requirements are handled elsewhere (except for the stack limit check)
if op >= PUSH1 && op <= PUSH32 {
op = PUSH1
}
if op >= DUP1 && op <= DUP16 {
op = DUP1
}
if r, ok := _baseCheck[op]; ok {
err := stack.require(r.stackPop)
if err != nil {
return err
}
if r.stackPush && len(stack.data)-r.stackPop+1 > int(params.StackLimit.Int64()) {
return fmt.Errorf("stack limit reached (%d)", params.StackLimit.Int64())
}
gas.Add(gas, r.gas)
}
return nil
}
func toWordSize(size *big.Int) *big.Int {
tmp := new(big.Int)
tmp.Add(size, u256(31))
tmp.Div(tmp, u256(32))
return tmp
}
type req struct {
stackPop int
gas *big.Int
stackPush bool
}
var _baseCheck = map[OpCode]req{
// opcode | stack pop | gas price | stack push
ADD: {2, GasFastestStep, true},
LT: {2, GasFastestStep, true},
GT: {2, GasFastestStep, true},
SLT: {2, GasFastestStep, true},
SGT: {2, GasFastestStep, true},
EQ: {2, GasFastestStep, true},
ISZERO: {1, GasFastestStep, true},
SUB: {2, GasFastestStep, true},
AND: {2, GasFastestStep, true},
OR: {2, GasFastestStep, true},
XOR: {2, GasFastestStep, true},
NOT: {1, GasFastestStep, true},
BYTE: {2, GasFastestStep, true},
CALLDATALOAD: {1, GasFastestStep, true},
CALLDATACOPY: {3, GasFastestStep, true},
MLOAD: {1, GasFastestStep, true},
MSTORE: {2, GasFastestStep, false},
MSTORE8: {2, GasFastestStep, false},
CODECOPY: {3, GasFastestStep, false},
MUL: {2, GasFastStep, true},
DIV: {2, GasFastStep, true},
SDIV: {2, GasFastStep, true},
MOD: {2, GasFastStep, true},
SMOD: {2, GasFastStep, true},
SIGNEXTEND: {2, GasFastStep, true},
ADDMOD: {3, GasMidStep, true},
MULMOD: {3, GasMidStep, true},
JUMP: {1, GasMidStep, false},
JUMPI: {2, GasSlowStep, false},
EXP: {2, GasSlowStep, true},
ADDRESS: {0, GasQuickStep, true},
ORIGIN: {0, GasQuickStep, true},
CALLER: {0, GasQuickStep, true},
CALLVALUE: {0, GasQuickStep, true},
CODESIZE: {0, GasQuickStep, true},
GASPRICE: {0, GasQuickStep, true},
COINBASE: {0, GasQuickStep, true},
TIMESTAMP: {0, GasQuickStep, true},
NUMBER: {0, GasQuickStep, true},
CALLDATASIZE: {0, GasQuickStep, true},
DIFFICULTY: {0, GasQuickStep, true},
GASLIMIT: {0, GasQuickStep, true},
POP: {1, GasQuickStep, false},
PC: {0, GasQuickStep, true},
MSIZE: {0, GasQuickStep, true},
GAS: {0, GasQuickStep, true},
BLOCKHASH: {1, GasExtStep, true},
BALANCE: {1, GasExtStep, true},
EXTCODESIZE: {1, GasExtStep, true},
EXTCODECOPY: {4, GasExtStep, false},
SLOAD: {1, params.SloadGas, true},
SSTORE: {2, Zero, false},
SHA3: {2, params.Sha3Gas, true},
CREATE: {3, params.CreateGas, true},
CALL: {7, params.CallGas, true},
CALLCODE: {7, params.CallGas, true},
JUMPDEST: {0, params.JumpdestGas, false},
SUICIDE: {1, Zero, false},
RETURN: {2, Zero, false},
PUSH1: {0, GasFastestStep, true},
DUP1: {0, Zero, true},
}
|
