wasmtime-cli 43.0.2

Command-line interface for Wasmtime
Documentation 
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

;; Bulk instructions

;; invalid uses

(assert_invalid
  (module
    (type $a (array i8))
    (type $b (array (mut i8)))

    (func (export "array.copy-immutable") (param $1 (ref $a)) (param $2 (ref $b))
      (array.copy $a $b (local.get $1) (i32.const 0) (local.get $2) (i32.const 0) (i32.const 0))
    )
  )
  "immutable array"
)

(assert_invalid
  (module
    (type $a (array (mut i8)))
    (type $b (array i16))

    (func (export "array.copy-packed-invalid") (param $1 (ref $a)) (param $2 (ref $b))
      (array.copy $a $b (local.get $1) (i32.const 0) (local.get $2) (i32.const 0) (i32.const 0))
    )
  )
  "array types do not match"
)

(assert_invalid
  (module
    (type $a (array (mut i8)))
    (type $b (array (mut (ref $a))))

    (func (export "array.copy-ref-invalid-1") (param $1 (ref $a)) (param $2 (ref $b))
      (array.copy $a $b (local.get $1) (i32.const 0) (local.get $2) (i32.const 0) (i32.const 0))
    )
  )
  "array types do not match"
)

(assert_invalid
  (module
    (type $a (array (mut i8)))
    (type $b (array (mut (ref $a))))
    (type $c (array (mut (ref $b))))

    (func (export "array.copy-ref-invalid-1") (param $1 (ref $b)) (param $2 (ref $c))
      (array.copy $b $c (local.get $1) (i32.const 0) (local.get $2) (i32.const 0) (i32.const 0))
    )
  )
  "array types do not match"
)

(module
  (type $arr8 (array i8))
  (type $arr8_mut (array (mut i8)))

  (global $g_arr8 (ref $arr8) (array.new $arr8 (i32.const 10) (i32.const 12)))
  (global $g_arr8_mut (mut (ref $arr8_mut)) (array.new_default $arr8_mut (i32.const 12)))

  (data $d1 "abcdefghijkl")

  (func (export "array_get_nth") (param $1 i32) (result i32)
    (array.get_u $arr8_mut (global.get $g_arr8_mut) (local.get $1))
  )

  (func (export "array_copy-null-left")
    (array.copy $arr8_mut $arr8 (ref.null $arr8_mut) (i32.const 0) (global.get $g_arr8) (i32.const 0) (i32.const 0))
  )

  (func (export "array_copy-null-right")
    (array.copy $arr8_mut $arr8 (global.get $g_arr8_mut) (i32.const 0) (ref.null $arr8) (i32.const 0) (i32.const 0))
  )

  (func (export "array_copy") (param $1 i32) (param $2 i32) (param $3 i32)
    (array.copy $arr8_mut $arr8 (global.get $g_arr8_mut) (local.get $1) (global.get $g_arr8) (local.get $2) (local.get $3))
  )

  (func (export "array_copy_overlap_test-1")
    (local $1 (ref $arr8_mut))
    (array.new_data $arr8_mut $d1 (i32.const 0) (i32.const 12))
    (local.set $1)
    (array.copy $arr8_mut $arr8_mut (local.get $1) (i32.const 1) (local.get $1) (i32.const 0) (i32.const 11))
    (global.set $g_arr8_mut (local.get $1))
  )

  (func (export "array_copy_overlap_test-2")
    (local $1 (ref $arr8_mut))
    (array.new_data $arr8_mut $d1 (i32.const 0) (i32.const 12))
    (local.set $1)
    (array.copy $arr8_mut $arr8_mut (local.get $1) (i32.const 0) (local.get $1) (i32.const 1) (i32.const 11))
    (global.set $g_arr8_mut (local.get $1))
  )
)

;; null array argument traps
(assert_trap (invoke "array_copy-null-left") "null array reference")
(assert_trap (invoke "array_copy-null-right") "null array reference")

;; OOB initial index traps
(assert_trap (invoke "array_copy" (i32.const 13) (i32.const 0) (i32.const 0)) "out of bounds array access")
(assert_trap (invoke "array_copy" (i32.const 0) (i32.const 13) (i32.const 0)) "out of bounds array access")

;; OOB length traps
(assert_trap (invoke "array_copy" (i32.const 0) (i32.const 0) (i32.const 13)) "out of bounds array access")
(assert_trap (invoke "array_copy" (i32.const 0) (i32.const 0) (i32.const 13)) "out of bounds array access")

;; start index = array size, len = 0 doesn't trap
(assert_return (invoke "array_copy" (i32.const 12) (i32.const 0) (i32.const 0)))
(assert_return (invoke "array_copy" (i32.const 0) (i32.const 12) (i32.const 0)))

;; check arrays were not modified
(assert_return (invoke "array_get_nth" (i32.const 0)) (i32.const 0))
(assert_return (invoke "array_get_nth" (i32.const 5)) (i32.const 0))
(assert_return (invoke "array_get_nth" (i32.const 11)) (i32.const 0))
(assert_trap (invoke "array_get_nth" (i32.const 12)) "out of bounds array access")

;; normal case
(assert_return (invoke "array_copy" (i32.const 0) (i32.const 0) (i32.const 2)))
(assert_return (invoke "array_get_nth" (i32.const 0)) (i32.const 10))
(assert_return (invoke "array_get_nth" (i32.const 1)) (i32.const 10))
(assert_return (invoke "array_get_nth" (i32.const 2)) (i32.const 0))

;; test that overlapping array.copy works as if intermediate copy taken
(assert_return (invoke "array_copy_overlap_test-1"))
(assert_return (invoke "array_get_nth" (i32.const 0)) (i32.const 97))
(assert_return (invoke "array_get_nth" (i32.const 1)) (i32.const 97))
(assert_return (invoke "array_get_nth" (i32.const 2)) (i32.const 98))
(assert_return (invoke "array_get_nth" (i32.const 5)) (i32.const 101))
(assert_return (invoke "array_get_nth" (i32.const 10)) (i32.const 106))
(assert_return (invoke "array_get_nth" (i32.const 11)) (i32.const 107))

(assert_return (invoke "array_copy_overlap_test-2"))
(assert_return (invoke "array_get_nth" (i32.const 0)) (i32.const 98))
(assert_return (invoke "array_get_nth" (i32.const 1)) (i32.const 99))
(assert_return (invoke "array_get_nth" (i32.const 5)) (i32.const 103))
(assert_return (invoke "array_get_nth" (i32.const 9)) (i32.const 107))
(assert_return (invoke "array_get_nth" (i32.const 10)) (i32.const 108))
(assert_return (invoke "array_get_nth" (i32.const 11)) (i32.const 108))