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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// Copyright 2019 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.
#include "test/wasm-api-tests/wasm-api-test.h"
#include "src/execution/isolate.h"
#include "src/heap/heap.h"
#include "src/wasm/c-api.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace {
own<Trap> Stage2(void* env, const Val args[], Val results[]) {
printf("Stage2...\n");
WasmCapiTest* self = reinterpret_cast<WasmCapiTest*>(env);
Func* stage3 = self->GetExportedFunction(1);
own<Trap> trap = stage3->call(args, results);
if (trap) {
printf("Stage2: got exception: %s\n", trap->message().get());
} else {
printf("Stage2: call successful\n");
}
return trap;
}
own<Trap> Stage4_GC(void* env, const Val args[], Val results[]) {
printf("Stage4...\n");
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env);
isolate->heap()->PreciseCollectAllGarbage(
i::Heap::kForcedGC, i::GarbageCollectionReason::kTesting,
v8::kNoGCCallbackFlags);
results[0] = Val::i32(args[0].i32() + 1);
return nullptr;
}
class WasmCapiCallbacksTest : public WasmCapiTest {
public:
WasmCapiCallbacksTest() : WasmCapiTest() {
// Build the following function:
// int32 stage1(int32 arg0) { return stage2(arg0); }
uint32_t stage2_index =
builder()->AddImport(CStrVector("stage2"), wasm_i_i_sig());
byte code[] = {WASM_CALL_FUNCTION(stage2_index, WASM_GET_LOCAL(0))};
AddExportedFunction(CStrVector("stage1"), code, sizeof(code));
stage2_ = Func::make(store(), cpp_i_i_sig(), Stage2, this);
}
Func* stage2() { return stage2_.get(); }
void AddExportedFunction(Vector<const char> name, byte code[],
size_t code_size) {
WasmCapiTest::AddExportedFunction(name, code, code_size, wasm_i_i_sig());
}
private:
own<Func> stage2_;
};
} // namespace
TEST_F(WasmCapiCallbacksTest, Trap) {
// Build the following function:
// int32 stage3_trap(int32 arg0) { unreachable(); }
byte code[] = {WASM_UNREACHABLE};
AddExportedFunction(CStrVector("stage3_trap"), code, sizeof(code));
Extern* imports[] = {stage2()};
Instantiate(imports);
Val args[] = {Val::i32(42)};
Val results[1];
own<Trap> trap = GetExportedFunction(0)->call(args, results);
EXPECT_NE(trap, nullptr);
printf("Stage0: Got trap as expected: %s\n", trap->message().get());
}
TEST_F(WasmCapiCallbacksTest, GC) {
// Build the following function:
// int32 stage3_to4(int32 arg0) { return stage4(arg0); }
uint32_t stage4_index =
builder()->AddImport(CStrVector("stage4"), wasm_i_i_sig());
byte code[] = {WASM_CALL_FUNCTION(stage4_index, WASM_GET_LOCAL(0))};
AddExportedFunction(CStrVector("stage3_to4"), code, sizeof(code));
i::Isolate* isolate =
reinterpret_cast<::wasm::StoreImpl*>(store())->i_isolate();
own<Func> stage4 = Func::make(store(), cpp_i_i_sig(), Stage4_GC, isolate);
EXPECT_EQ(cpp_i_i_sig()->params().size(), stage4->type()->params().size());
EXPECT_EQ(cpp_i_i_sig()->results().size(), stage4->type()->results().size());
Extern* imports[] = {stage2(), stage4.get()};
Instantiate(imports);
Val args[] = {Val::i32(42)};
Val results[1];
own<Trap> trap = GetExportedFunction(0)->call(args, results);
EXPECT_EQ(trap, nullptr);
EXPECT_EQ(43, results[0].i32());
}
namespace {
own<Trap> FibonacciC(void* env, const Val args[], Val results[]) {
int32_t x = args[0].i32();
if (x == 0 || x == 1) {
results[0] = Val::i32(x);
return nullptr;
}
WasmCapiTest* self = reinterpret_cast<WasmCapiTest*>(env);
Func* fibo_wasm = self->GetExportedFunction(0);
// Aggressively re-use existing arrays. That's maybe not great coding
// style, but this test intentionally ensures that it works if someone
// insists on doing it.
Val recursive_args[] = {Val::i32(x - 1)};
own<Trap> trap = fibo_wasm->call(recursive_args, results);
DCHECK_NULL(trap);
int32_t x1 = results[0].i32();
recursive_args[0] = Val::i32(x - 2);
trap = fibo_wasm->call(recursive_args, results);
DCHECK_NULL(trap);
int32_t x2 = results[0].i32();
results[0] = Val::i32(x1 + x2);
return nullptr;
}
} // namespace
TEST_F(WasmCapiTest, Recursion) {
// Build the following function:
// int32 fibonacci_wasm(int32 arg0) {
// if (arg0 == 0) return 0;
// if (arg0 == 1) return 1;
// return fibonacci_c(arg0 - 1) + fibonacci_c(arg0 - 2);
// }
uint32_t fibo_c_index =
builder()->AddImport(CStrVector("fibonacci_c"), wasm_i_i_sig());
byte code_fibo[] = {
WASM_IF(WASM_I32_EQ(WASM_GET_LOCAL(0), WASM_ZERO),
WASM_RETURN1(WASM_ZERO)),
WASM_IF(WASM_I32_EQ(WASM_GET_LOCAL(0), WASM_ONE), WASM_RETURN1(WASM_ONE)),
// Muck with the parameter to ensure callers don't depend on its value.
WASM_SET_LOCAL(0, WASM_I32_SUB(WASM_GET_LOCAL(0), WASM_ONE)),
WASM_RETURN1(WASM_I32_ADD(
WASM_CALL_FUNCTION(fibo_c_index, WASM_GET_LOCAL(0)),
WASM_CALL_FUNCTION(fibo_c_index,
WASM_I32_SUB(WASM_GET_LOCAL(0), WASM_ONE))))};
AddExportedFunction(CStrVector("fibonacci_wasm"), code_fibo,
sizeof(code_fibo), wasm_i_i_sig());
own<Func> fibonacci = Func::make(store(), cpp_i_i_sig(), FibonacciC, this);
Extern* imports[] = {fibonacci.get()};
Instantiate(imports);
// Enough iterations to make it interesting, few enough to keep it fast.
Val args[] = {Val::i32(15)};
Val results[1];
own<Trap> result = GetExportedFunction(0)->call(args, results);
EXPECT_EQ(result, nullptr);
EXPECT_EQ(610, results[0].i32());
}
namespace {
own<Trap> PlusOne(const Val args[], Val results[]) {
int32_t a0 = args[0].i32();
results[0] = Val::i32(a0 + 1);
int64_t a1 = args[1].i64();
results[1] = Val::i64(a1 + 1);
float a2 = args[2].f32();
results[2] = Val::f32(a2 + 1);
double a3 = args[3].f64();
results[3] = Val::f64(a3 + 1);
results[4] = Val::ref(args[4].ref()->copy()); // No +1 for Refs.
return nullptr;
}
} // namespace
TEST_F(WasmCapiTest, DirectCallCapiFunction) {
own<FuncType> cpp_sig =
FuncType::make(ownvec<ValType>::make(
ValType::make(::wasm::I32), ValType::make(::wasm::I64),
ValType::make(::wasm::F32), ValType::make(::wasm::F64),
ValType::make(::wasm::ANYREF)),
ownvec<ValType>::make(
ValType::make(::wasm::I32), ValType::make(::wasm::I64),
ValType::make(::wasm::F32), ValType::make(::wasm::F64),
ValType::make(::wasm::ANYREF)));
own<Func> func = Func::make(store(), cpp_sig.get(), PlusOne);
Extern* imports[] = {func.get()};
ValueType wasm_types[] = {kWasmI32, kWasmI64, kWasmF32, kWasmF64,
kWasmAnyRef, kWasmI32, kWasmI64, kWasmF32,
kWasmF64, kWasmAnyRef};
FunctionSig wasm_sig(5, 5, wasm_types);
int func_index = builder()->AddImport(CStrVector("func"), &wasm_sig);
builder()->ExportImportedFunction(CStrVector("func"), func_index);
Instantiate(imports);
int32_t a0 = 42;
int64_t a1 = 0x1234c0ffee;
float a2 = 1234.5;
double a3 = 123.45;
Val args[] = {Val::i32(a0), Val::i64(a1), Val::f32(a2), Val::f64(a3),
Val::ref(func->copy())};
Val results[5];
// Test that {func} can be called directly.
own<Trap> trap = func->call(args, results);
EXPECT_EQ(nullptr, trap);
EXPECT_EQ(a0 + 1, results[0].i32());
EXPECT_EQ(a1 + 1, results[1].i64());
EXPECT_EQ(a2 + 1, results[2].f32());
EXPECT_EQ(a3 + 1, results[3].f64());
EXPECT_TRUE(func->same(results[4].ref()));
// Test that {func} can be called after import/export round-tripping.
trap = GetExportedFunction(0)->call(args, results);
EXPECT_EQ(nullptr, trap);
EXPECT_EQ(a0 + 1, results[0].i32());
EXPECT_EQ(a1 + 1, results[1].i64());
EXPECT_EQ(a2 + 1, results[2].f32());
EXPECT_EQ(a3 + 1, results[3].f64());
EXPECT_TRUE(func->same(results[4].ref()));
}
} // namespace wasm
} // namespace internal
} // namespace v8
|