aboutsummaryrefslogtreecommitdiffstats
path: root/tests/vm_test_util.go
blob: 25e2398fe9a6f53d920efda29c6c06e50da7e0ab (plain) (blame)
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
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.

package tests

import (
    "bytes"
    "fmt"
    "io"
    "math/big"
    "strconv"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/vm"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/logger/glog"
)

func RunVmTestWithReader(r io.Reader, skipTests []string) error {
    tests := make(map[string]VmTest)
    err := readJson(r, &tests)
    if err != nil {
        return err
    }

    if err != nil {
        return err
    }

    if err := runVmTests(tests, skipTests); err != nil {
        return err
    }

    return nil
}

func RunVmTest(p string, skipTests []string) error {

    tests := make(map[string]VmTest)
    err := readJsonFile(p, &tests)
    if err != nil {
        return err
    }

    if err := runVmTests(tests, skipTests); err != nil {
        return err
    }

    return nil
}

func runVmTests(tests map[string]VmTest, skipTests []string) error {
    skipTest := make(map[string]bool, len(skipTests))
    for _, name := range skipTests {
        skipTest[name] = true
    }

    for name, test := range tests {
        if skipTest[name] {
            glog.Infoln("Skipping VM test", name)
            return nil
        }

        if err := runVmTest(test); err != nil {
            return fmt.Errorf("%s %s", name, err.Error())
        }

        glog.Infoln("VM test passed: ", name)
        //fmt.Println(string(statedb.Dump()))
    }
    return nil
}

func runVmTest(test VmTest) error {
    db, _ := ethdb.NewMemDatabase()
    statedb := state.New(common.Hash{}, db)
    for addr, account := range test.Pre {
        obj := StateObjectFromAccount(db, addr, account)
        statedb.SetStateObject(obj)
        for a, v := range account.Storage {
            obj.SetState(common.HexToHash(a), common.HexToHash(v))
        }
    }

    // XXX Yeah, yeah...
    env := make(map[string]string)
    env["currentCoinbase"] = test.Env.CurrentCoinbase
    env["currentDifficulty"] = test.Env.CurrentDifficulty
    env["currentGasLimit"] = test.Env.CurrentGasLimit
    env["currentNumber"] = test.Env.CurrentNumber
    env["previousHash"] = test.Env.PreviousHash
    if n, ok := test.Env.CurrentTimestamp.(float64); ok {
        env["currentTimestamp"] = strconv.Itoa(int(n))
    } else {
        env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
    }

    var (
        ret  []byte
        gas  *big.Int
        err  error
        logs state.Logs
    )

    ret, logs, gas, err = RunVm(statedb, env, test.Exec)

    // Compare expected and actual return
    rexp := common.FromHex(test.Out)
    if bytes.Compare(rexp, ret) != 0 {
        return fmt.Errorf("return failed. Expected %x, got %x\n", rexp, ret)
    }

    // Check gas usage
    if len(test.Gas) == 0 && err == nil {
        return fmt.Errorf("gas unspecified, indicating an error. VM returned (incorrectly) successfull")
    } else {
        gexp := common.Big(test.Gas)
        if gexp.Cmp(gas) != 0 {
            return fmt.Errorf("gas failed. Expected %v, got %v\n", gexp, gas)
        }
    }

    // check post state
    for addr, account := range test.Post {
        obj := statedb.GetStateObject(common.HexToAddress(addr))
        if obj == nil {
            continue
        }

        for addr, value := range account.Storage {
            v := obj.GetState(common.HexToHash(addr))
            vexp := common.HexToHash(value)

            if v != vexp {
                return fmt.Errorf("(%x: %s) storage failed. Expected %x, got %x (%v %v)\n", obj.Address().Bytes()[0:4], addr, vexp, v, vexp.Big(), v.Big())
            }
        }
    }

    // check logs
    if len(test.Logs) > 0 {
        lerr := checkLogs(test.Logs, logs)
        if lerr != nil {
            return lerr
        }
    }

    return nil
}

func RunVm(state *state.StateDB, env, exec map[string]string) ([]byte, state.Logs, *big.Int, error) {
    var (
        to    = common.HexToAddress(exec["address"])
        from  = common.HexToAddress(exec["caller"])
        data  = common.FromHex(exec["data"])
        gas   = common.Big(exec["gas"])
        price = common.Big(exec["gasPrice"])
        value = common.Big(exec["value"])
    )
    // Reset the pre-compiled contracts for VM tests.
    vm.Precompiled = make(map[string]*vm.PrecompiledAccount)

    caller := state.GetOrNewStateObject(from)

    vmenv := NewEnvFromMap(state, env, exec)
    vmenv.vmTest = true
    vmenv.skipTransfer = true
    vmenv.initial = true
    ret, err := vmenv.Call(caller, to, data, gas, price, value)

    return ret, vmenv.state.Logs(), vmenv.Gas, err
}