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// 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 "src/execution/isolate.h"
#include "src/heap/heap.h"
#include "src/wasm/c-api.h"
#include "src/wasm/wasm-module-builder.h"
#include "src/wasm/wasm-opcodes.h"
#include "src/zone/accounting-allocator.h"
#include "src/zone/zone.h"
#include "test/common/wasm/wasm-macro-gen.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/wasm-api/wasm.hh"
namespace wasm {
// TODO(jkummerow): Drop these from the API.
#ifdef DEBUG
template <class T>
void vec<T>::make_data() {}
template <class T>
void vec<T>::free_data() {}
#endif
} // namespace wasm
namespace v8 {
namespace internal {
namespace wasm {
namespace {
using ::wasm::Engine;
using ::wasm::Extern;
using ::wasm::Func;
using ::wasm::FuncType;
using ::wasm::Instance;
using ::wasm::Module;
using ::wasm::own;
using ::wasm::Store;
using ::wasm::Trap;
using ::wasm::Val;
using ::wasm::ValType;
using ::wasm::vec;
own<Trap*> Stage2(void* env, const Val args[], Val results[]);
class WasmCapiTest : public ::testing::Test {
public:
WasmCapiTest()
: Test(),
zone_(&allocator_, ZONE_NAME),
builder_(&zone_),
exports_(vec<Extern*>::make()),
wasm_sig_(1, 1, wasm_sig_types_) {
engine_ = Engine::make();
store_ = Store::make(engine_.get());
// Build the following function:
// int32 stage1(int32 arg0) { return stage2(arg0); }
uint32_t stage2_index =
builder_.AddImport(ArrayVector("stage2"), wasm_sig());
byte code[] = {WASM_CALL_FUNCTION(stage2_index, WASM_GET_LOCAL(0))};
AddExportedFunction(CStrVector("stage1"), code, sizeof(code));
cpp_sig_ = FuncType::make(vec<ValType*>::make(ValType::make(::wasm::I32)),
vec<ValType*>::make(ValType::make(::wasm::I32)));
stage2_ = Func::make(store(), cpp_sig_.get(), Stage2, this);
}
void Compile() {
ZoneBuffer buffer(&zone_);
builder_.WriteTo(buffer);
size_t size = buffer.end() - buffer.begin();
vec<byte_t> binary = vec<byte_t>::make(
size, reinterpret_cast<byte_t*>(const_cast<byte*>(buffer.begin())));
module_ = Module::make(store_.get(), binary);
DCHECK_NE(module_.get(), nullptr);
}
own<Trap*> Run(Extern* imports[], Val args[], Val results[]) {
instance_ = Instance::make(store_.get(), module_.get(), imports);
DCHECK_NE(instance_.get(), nullptr);
exports_ = instance_->exports();
Func* entry = GetExportedFunction(0);
return entry->call(args, results);
}
void AddExportedFunction(Vector<const char> name, byte code[],
size_t code_size) {
WasmFunctionBuilder* fun = builder()->AddFunction(wasm_sig());
fun->EmitCode(code, static_cast<uint32_t>(code_size));
fun->Emit(kExprEnd);
builder()->AddExport(name, fun);
}
Func* GetExportedFunction(size_t index) {
DCHECK_GT(exports_.size(), index);
Extern* exported = exports_[index];
DCHECK_EQ(exported->kind(), ::wasm::EXTERN_FUNC);
Func* func = exported->func();
DCHECK_NE(func, nullptr);
return func;
}
WasmModuleBuilder* builder() { return &builder_; }
Store* store() { return store_.get(); }
Func* stage2() { return stage2_.get(); }
FunctionSig* wasm_sig() { return &wasm_sig_; }
FuncType* cpp_sig() { return cpp_sig_.get(); }
private:
AccountingAllocator allocator_;
Zone zone_;
WasmModuleBuilder builder_;
own<Engine*> engine_;
own<Store*> store_;
own<Module*> module_;
own<Instance*> instance_;
vec<Extern*> exports_;
own<Func*> stage2_;
own<FuncType*> cpp_sig_;
ValueType wasm_sig_types_[2] = {kWasmI32, kWasmI32};
FunctionSig wasm_sig_;
};
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*> result = stage3->call(args, results);
if (result) {
printf("Stage2: got exception: %s\n", result->message().get());
} else {
printf("Stage2: call successful\n");
}
return result;
}
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::kNoGCFlags, i::GarbageCollectionReason::kTesting,
v8::kGCCallbackFlagForced);
results[0] = Val::i32(args[0].i32() + 1);
return nullptr;
}
} // namespace
TEST_F(WasmCapiTest, Trap) {
// Build the following function:
// int32 stage3_trap(int32 arg0) { unreachable(); }
byte code[] = {WASM_UNREACHABLE};
AddExportedFunction(CStrVector("stage3_trap"), code, sizeof(code));
Compile();
Extern* imports[] = {stage2()};
Val args[] = {Val::i32(42)};
Val results[1];
own<Trap*> result = Run(imports, args, results);
EXPECT_NE(result, nullptr);
printf("Stage0: Got trap as expected: %s\n", result->message().get());
}
TEST_F(WasmCapiTest, GC) {
// Build the following function:
// int32 stage3_to4(int32 arg0) { return stage4(arg0); }
uint32_t stage4_index =
builder()->AddImport(ArrayVector("stage4"), wasm_sig());
byte code[] = {WASM_CALL_FUNCTION(stage4_index, WASM_GET_LOCAL(0))};
AddExportedFunction(CStrVector("stage3_to4"), code, sizeof(code));
Compile();
i::Isolate* isolate =
reinterpret_cast<::wasm::StoreImpl*>(store())->i_isolate();
own<Func*> stage4 = Func::make(store(), cpp_sig(), Stage4_GC, isolate);
EXPECT_EQ(cpp_sig()->params().size(), stage4->type()->params().size());
EXPECT_EQ(cpp_sig()->results().size(), stage4->type()->results().size());
Extern* imports[] = {stage2(), stage4.get()};
Val args[] = {Val::i32(42)};
Val results[1];
own<Trap*> result = Run(imports, args, results);
EXPECT_EQ(result, nullptr);
EXPECT_EQ(43, results[0].i32());
}
} // namespace wasm
} // namespace internal
} // namespace v8
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