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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155 | @pytest.mark.ported_from(
[
f"{LEGACY_VM_TESTS}/DynamicJumpInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/DynamicJumpInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/DynamicJumpifInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/DynamicJumpifInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/DynamicJumpiOutsideBoundaryFiller.json",
f"{LEGACY_VM_TESTS}/DynamicJumpJD_DependsOnJumps0Filler.json",
f"{LEGACY_VM_TESTS}/DynamicJumpPathologicalTest1Filler.json",
f"{LEGACY_VM_TESTS}/DynamicJumpPathologicalTest2Filler.json",
f"{LEGACY_VM_TESTS}/DynamicJumpPathologicalTest3Filler.json",
f"{LEGACY_VM_TESTS}/BlockNumberDynamicJumpInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/BlockNumberDynamicJumpInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/BlockNumberDynamicJumpifInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/BlockNumberDynamicJumpifInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/BlockNumberDynamicJumpiOutsideBoundaryFiller.json",
f"{LEGACY_VM_TESTS}/JDfromStorageDynamicJumpInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/JDfromStorageDynamicJumpInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/JDfromStorageDynamicJumpifInsidePushWithJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/JDfromStorageDynamicJumpifInsidePushWithoutJumpDestFiller.json",
f"{LEGACY_VM_TESTS}/JDfromStorageDynamicJumpiOutsideBoundaryFiller.json",
f"{LEGACY_VM_TESTS}/bad_indirect_jump2Filler.json",
],
)
@pytest.mark.valid_from("Frontier")
@pytest.mark.parametrize(
"opcode,condition",
[
pytest.param(Op.JUMP, (), id="jump"),
pytest.param(Op.JUMPI, (1,), id="jumpi"),
],
)
@pytest.mark.parametrize(
"dest_source,dest_kind",
[
(source, kind)
for source in ("calldata", "storage", "number")
for kind in DESTINATION_KINDS
],
)
def test_dynamic_jump_invalid_destination(
state_test: StateTestFiller,
pre: Alloc,
fork: Fork,
opcode: Op,
condition: Tuple[int, ...],
dest_source: str,
dest_kind: str,
) -> None:
"""
Jump to an invalid destination computed at run time and verify the
exceptional halt: storage stays empty and all gas is consumed.
The destination is never a static PUSH, so implementations that
pre-analyze PUSH+JUMP pairs must still validate it at execution time.
It is read from calldata, read from storage, or derived from the
block number, and it lands inside PUSH immediate data (on a 0x5B byte
and on a non-0x5B byte), one byte past the code, at an offset whose
truncation to 64 bits is a valid JUMPDEST, or at the maximum word.
"""
env = Environment()
storage = Storage()
dest_expression = {
"calldata": Op.CALLDATALOAD(0),
"storage": Op.SLOAD(DESTINATION_SLOT),
"number": Op.ADD(Op.NUMBER, Op.CALLDATALOAD(0)),
}[dest_source]
dispatch = opcode(dest_expression, *condition)
fallthrough = (
Op.SSTORE(storage.store_next(0, "jump not halted"), 1) + Op.STOP
)
island = Op.PUSH2(0x5B00) + Op.POP
code = (
dispatch
+ fallthrough
+ island
+ Op.JUMPDEST
+ Op.SSTORE(storage.store_next(0, "invalid destination taken"), 2)
+ Op.STOP
)
push_data = len(dispatch + fallthrough) + 1
jumpdest = len(dispatch + fallthrough + island)
assert bytes(code)[push_data] == Op.JUMPDEST.int()
assert bytes(code)[push_data + 1] != Op.JUMPDEST.int()
assert bytes(code)[jumpdest] == Op.JUMPDEST.int()
dest = {
"push_data_jumpdest": push_data,
"push_data_non_jumpdest": push_data + 1,
"one_past_code": len(code),
"jumpdest_alias_2_64": 2**64 + jumpdest,
"max_u256": 2**256 - 1,
}[dest_kind]
initial_storage = Storage()
if dest_source == "storage":
initial_storage[DESTINATION_SLOT] = dest
storage[DESTINATION_SLOT] = dest
contract = pre.deploy_contract(code, storage=initial_storage)
tx = Transaction(
sender=pre.fund_eoa(),
to=contract,
data={
"calldata": Hash(dest),
"storage": b"",
"number": Hash(dest - env.number),
}[dest_source],
gas_limit=GAS_LIMIT,
expected_receipt=TransactionReceipt(cumulative_gas_used=GAS_LIMIT),
protected=fork.supports_protected_txs(),
)
state_test(
env=env, pre=pre, post={contract: Account(storage=storage)}, tx=tx
)
|