wasmtime-cli 46.0.1

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
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

;;! gc = true

;; Test GC operations in constant expression contexts (global initializers and
;; element segment expressions) and covers `struct.new_default` with every
;; storage type to cover all our code paths.

;; `ConstOp::StructNew`
(module
  (type $s (struct (field i32) (field f64)))

  (global $g anyref (struct.new $s (i32.const 7) (f64.const 3.14)))

  (func (export "struct-new-const") (result i32)
    (struct.get $s 0 (ref.cast (ref $s) (global.get $g)))
  )
)
(assert_return (invoke "struct-new-const") (i32.const 7))

;; `ConstOp::StructNewDefault` w/ one field per storage type
(module
  (type $s (struct
    (field i8)
    (field i16)
    (field i32)
    (field i64)
    (field f32)
    (field f64)
    (field anyref)
  ))

  ;; struct.new_default fills every field with its zero/null default
  (global $g anyref (struct.new_default $s))

  (func (export "struct-new-default-i32") (result i32)
    (struct.get_s $s 0 (ref.cast (ref $s) (global.get $g)))
  )
  (func (export "struct-new-default-i64") (result i64)
    (struct.get $s 3 (ref.cast (ref $s) (global.get $g)))
  )
  (func (export "struct-new-default-f32") (result f32)
    (struct.get $s 4 (ref.cast (ref $s) (global.get $g)))
  )
  (func (export "struct-new-default-f64") (result f64)
    (struct.get $s 5 (ref.cast (ref $s) (global.get $g)))
  )
  (func (export "struct-new-default-ref-null") (result i32)
    (ref.is_null (struct.get $s 6 (ref.cast (ref $s) (global.get $g))))
  )
)
(assert_return (invoke "struct-new-default-i32") (i32.const 0))
(assert_return (invoke "struct-new-default-i64") (i64.const 0))
(assert_return (invoke "struct-new-default-f32") (f32.const 0.0))
(assert_return (invoke "struct-new-default-f64") (f64.const 0.0))
(assert_return (invoke "struct-new-default-ref-null") (i32.const 1))

;; `ConstOp::ArrayNew`
(module
  (type $arr (array (mut i32)))

  (global $g anyref (array.new $arr (i32.const 99) (i32.const 3)))

  (func (export "array-new-const-len") (result i32)
    (array.len (ref.cast (ref $arr) (global.get $g)))
  )
  (func (export "array-new-const-elem") (result i32)
    (array.get $arr (ref.cast (ref $arr) (global.get $g)) (i32.const 1))
  )
)
(assert_return (invoke "array-new-const-len") (i32.const 3))
(assert_return (invoke "array-new-const-elem") (i32.const 99))

;; `ConstOp::ArrayNewDefault`
(module
  (type $arr (array (mut i32)))

  (global $g anyref (array.new_default $arr (i32.const 4)))

  (func (export "array-new-default-const-len") (result i32)
    (array.len (ref.cast (ref $arr) (global.get $g)))
  )
  (func (export "array-new-default-const-elem") (result i32)
    (array.get $arr (ref.cast (ref $arr) (global.get $g)) (i32.const 2))
  )
)
(assert_return (invoke "array-new-default-const-len") (i32.const 4))
(assert_return (invoke "array-new-default-const-elem") (i32.const 0))

;; `ConstOp::ArrayNewFixed`
(module
  (type $arr (array i32))

  (global $g anyref (array.new_fixed $arr 3
    (i32.const 10)
    (i32.const 20)
    (i32.const 30)
  ))

  (func (export "array-new-fixed-const-len") (result i32)
    (array.len (ref.cast (ref $arr) (global.get $g)))
  )
  (func (export "array-new-fixed-const-elem0") (result i32)
    (array.get $arr (ref.cast (ref $arr) (global.get $g)) (i32.const 0))
  )
  (func (export "array-new-fixed-const-elem2") (result i32)
    (array.get $arr (ref.cast (ref $arr) (global.get $g)) (i32.const 2))
  )
)
(assert_return (invoke "array-new-fixed-const-len")   (i32.const 3))
(assert_return (invoke "array-new-fixed-const-elem0") (i32.const 10))
(assert_return (invoke "array-new-fixed-const-elem2") (i32.const 30))

;; `ConstOp::ExternConvertAny`
(module
  (type $s (struct (field i32)))

  ;; Convert a struct anyref to an externref in a const expression.
  (global $g externref
    (extern.convert_any (struct.new $s (i32.const 55)))
  )

  (func (export "extern-convert-any-const") (result i32)
    (struct.get $s 0
      (ref.cast (ref $s)
        (any.convert_extern (global.get $g))
      )
    )
  )
)
(assert_return (invoke "extern-convert-any-const") (i32.const 55))

;; Null any -> null extern in a const expression.
(module
  (global $g externref (extern.convert_any (ref.null any)))

  (func (export "extern-convert-any-null") (result i32)
    (ref.is_null (global.get $g))
  )
)
(assert_return (invoke "extern-convert-any-null") (i32.const 1))

;; `ConstOp::AnyConvertExtern`
(module
  (global $g anyref
    (any.convert_extern
      (extern.convert_any
        (ref.i31 (i32.const 7))
      )
    )
  )
  (func (export "any-convert-extern-non-null") (result i32)
    (i31.get_u (ref.cast (ref i31) (global.get $g)))
  )
)
(assert_return (invoke "any-convert-extern-non-null") (i32.const 7))

;; Null extern -> null any in a const expression.
(module
  (func (export "any-convert-extern-null") (result i32)
    (ref.is_null (global.get $g))
  )
  (global $g anyref (any.convert_extern (ref.null extern)))
)
(assert_return (invoke "any-convert-extern-null") (i32.const 1))

;; `ConstOp::RefI31`
(module
  (global $g i31ref (ref.i31 (i32.const 42)))

  (func (export "ref-i31-const") (result i32)
    (i31.get_u (global.get $g))
  )
)
(assert_return (invoke "ref-i31-const") (i32.const 42))