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
|
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-wasm --experimental-wasm-eh
load("test/mjsunit/wasm/wasm-module-builder.js");
// Helper function to return a new exported exception with the {kSig_v_v} type
// signature from an anonymous module. The underlying module is thrown away.
function NewExportedException() {
let builder = new WasmModuleBuilder();
let except = builder.addException(kSig_v_v);
builder.addExportOfKind("ex", kExternalException, except);
let instance = builder.instantiate();
return instance.exports.ex;
}
// Check that an instance matches an exception thrown by itself, even when the
// exception is re-thrown by a regular JavaScript function.
(function TestSingleInstance() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let sig_index = builder.addType(kSig_v_v);
let fun = builder.addImport("m", "f", sig_index);
let except = builder.addException(kSig_v_v);
builder.addFunction("throw", kSig_v_v)
.addBody([
kExprThrow, except
]).exportFunc();
builder.addFunction("catch", kSig_v_v)
.addBody([
kExprTry, kWasmStmt,
kExprCallFunction, fun,
kExprCatch,
kExprBrOnExn, 0, except,
kExprRethrow,
kExprEnd,
]).exportFunc();
let ex_obj = new Error("my exception");
let instance = builder.instantiate({ m: { f: function() { throw ex_obj }}});
assertThrows(() => instance.exports.throw(), WebAssembly.RuntimeError);
assertThrowsEquals(() => instance.exports.catch(), ex_obj);
try {
instance.exports.throw();
} catch (e) {
ex_obj = e;
}
assertDoesNotThrow(() => instance.exports.catch());
})();
// Check that two instances distinguish their individual exceptions if they are
// not shared, even when declared by the same underlying module.
(function TestMultiInstanceNonShared() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let sig_index = builder.addType(kSig_v_v);
let fun = builder.addImport("m", "f", sig_index);
let except = builder.addException(kSig_v_v);
builder.addFunction("throw", kSig_v_v)
.addBody([
kExprThrow, except
]).exportFunc();
builder.addFunction("catch", kSig_v_v)
.addBody([
kExprTry, kWasmStmt,
kExprCallFunction, fun,
kExprCatch,
kExprBrOnExn, 0, except,
kExprRethrow,
kExprEnd,
]).exportFunc();
let ex_obj = new Error("my exception");
let instance1 = builder.instantiate({ m: { f: assertUnreachable }});
let instance2 = builder.instantiate({ m: { f: function() { throw ex_obj }}});
assertThrows(() => instance1.exports.throw(), WebAssembly.RuntimeError);
assertThrowsEquals(() => instance2.exports.catch(), ex_obj);
try {
instance1.exports.throw();
} catch (e) {
ex_obj = e;
}
assertThrowsEquals(() => instance2.exports.catch(), ex_obj);
})();
// Check that two instances match their exceptions if they are shared properly,
// even if the local exception index of export and import is different.
(function TestMultiInstanceShared() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let sig_index = builder.addType(kSig_v_v);
let fun = builder.addImport("m", "f", sig_index);
let except1 = builder.addImportedException("m", "ex1", kSig_v_v);
let except2 = builder.addException(kSig_v_v);
builder.addExportOfKind("ex2", kExternalException, except2);
builder.addFunction("throw", kSig_v_v)
.addBody([
kExprThrow, except2
]).exportFunc();
builder.addFunction("catch", kSig_v_v)
.addBody([
kExprTry, kWasmStmt,
kExprCallFunction, fun,
kExprCatch,
kExprBrOnExn, 0, except1,
kExprRethrow,
kExprEnd,
]).exportFunc();
let ex_obj = new Error("my exception");
let instance1 = builder.instantiate({ m: { f: assertUnreachable,
ex1: NewExportedException() }});
let instance2 = builder.instantiate({ m: { f: function() { throw ex_obj },
ex1: instance1.exports.ex2 }});
assertThrows(() => instance1.exports.throw(), WebAssembly.RuntimeError);
assertThrowsEquals(() => instance2.exports.catch(), ex_obj);
try {
instance1.exports.throw();
} catch (e) {
ex_obj = e;
}
assertDoesNotThrow(() => instance2.exports.catch());
})();
// Check that two instances based on different modules match their exceptions if
// they are shared properly, even if the local exception index is different.
(function TestMultiModuleShared() {
print(arguments.callee.name);
let builder1 = new WasmModuleBuilder();
let except1 = builder1.addException(kSig_v_v);
let except2 = builder1.addException(kSig_v_v);
builder1.addExportOfKind("ex", kExternalException, except2);
builder1.addFunction("throw", kSig_v_v)
.addBody([
kExprThrow, except2
]).exportFunc();
let builder2 = new WasmModuleBuilder();
let sig_index = builder2.addType(kSig_v_v);
let fun = builder2.addImport("m", "f", sig_index);
let except = builder2.addImportedException("m", "ex", kSig_v_v);
builder2.addFunction("catch", kSig_v_v)
.addBody([
kExprTry, kWasmStmt,
kExprCallFunction, fun,
kExprCatch,
kExprBrOnExn, 0, except,
kExprRethrow,
kExprEnd,
]).exportFunc();
let ex_obj = new Error("my exception");
let instance1 = builder1.instantiate();
let instance2 = builder2.instantiate({ m: { f: function() { throw ex_obj },
ex: instance1.exports.ex }});
assertThrows(() => instance1.exports.throw(), WebAssembly.RuntimeError);
assertThrowsEquals(() => instance2.exports.catch(), ex_obj);
try {
instance1.exports.throw();
} catch (e) {
ex_obj = e;
}
assertDoesNotThrow(() => instance2.exports.catch());
})();
|
