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
use crate::arena_set::ArenaSet;
use crate::emit::{Emit, EmitContext, Section};
use crate::error::Result;
use crate::module::Module;
use crate::parse::IndicesToIds;
use crate::ty::{Type, TypeId, ValType};
#[derive(Debug, Default)]
pub struct ModuleTypes {
arena: ArenaSet<Type>,
}
impl ModuleTypes {
pub fn get(&self, id: TypeId) -> &Type {
&self.arena[id]
}
pub fn get_mut(&mut self, id: TypeId) -> &mut Type {
&mut self.arena[id]
}
pub fn params_results(&self, id: TypeId) -> (&[ValType], &[ValType]) {
let ty = self.get(id);
(ty.params(), ty.results())
}
pub fn params(&self, id: TypeId) -> &[ValType] {
self.get(id).params()
}
pub fn results(&self, id: TypeId) -> &[ValType] {
self.get(id).results()
}
pub fn by_name(&self, name: &str) -> Option<TypeId> {
self.arena.iter().find_map(|(id, ty)| {
if ty.name.as_ref().map(|s| s.as_str()) == Some(name) {
Some(id)
} else {
None
}
})
}
pub fn iter(&self) -> impl Iterator<Item = &Type> {
self.arena.iter().map(|(_, f)| f)
}
pub fn delete(&mut self, ty: TypeId) {
self.arena.remove(ty);
}
pub fn add(&mut self, params: &[ValType], results: &[ValType]) -> TypeId {
let id = self.arena.next_id();
self.arena.insert(Type::new(
id,
params.to_vec().into_boxed_slice(),
results.to_vec().into_boxed_slice(),
))
}
pub(crate) fn add_entry_ty(&mut self, results: &[ValType]) -> TypeId {
let id = self.arena.next_id();
self.arena.insert(Type::for_function_entry(
id,
results.to_vec().into_boxed_slice(),
))
}
pub fn find(&self, params: &[ValType], results: &[ValType]) -> Option<TypeId> {
self.arena.iter().find_map(|(id, ty)| {
if !ty.is_for_function_entry() && ty.params() == params && ty.results() == results {
Some(id)
} else {
None
}
})
}
pub(crate) fn find_for_function_entry(&self, results: &[ValType]) -> Option<TypeId> {
self.arena.iter().find_map(|(id, ty)| {
if ty.is_for_function_entry() && ty.params().is_empty() && ty.results() == results {
Some(id)
} else {
None
}
})
}
}
impl Module {
pub(crate) fn parse_types(
&mut self,
section: wasmparser::TypeSectionReader,
ids: &mut IndicesToIds,
) -> Result<()> {
log::debug!("parsing type section");
for ty in section {
let fun_ty = ty?;
let id = self.types.arena.next_id();
let params = fun_ty
.params
.iter()
.map(ValType::parse)
.collect::<Result<Vec<_>>>()?
.into_boxed_slice();
let results = fun_ty
.returns
.iter()
.map(ValType::parse)
.collect::<Result<Vec<_>>>()?
.into_boxed_slice();
let id = self.types.arena.insert(Type::new(id, params, results));
ids.push_type(id);
}
Ok(())
}
}
impl Emit for ModuleTypes {
fn emit(&self, cx: &mut EmitContext) {
log::debug!("emitting type section");
let mut tys = self
.arena
.iter()
.filter(|(_, ty)| !ty.is_for_function_entry())
.collect::<Vec<_>>();
if tys.is_empty() {
return;
}
let mut cx = cx.start_section(Section::Type);
cx.encoder.usize(tys.len());
tys.sort_by_key(|&(_, ty)| ty);
for (id, ty) in tys {
cx.indices.push_type(id);
ty.emit(&mut cx);
}
}
}