// Copyright 2020 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 #include "src/base/vector.h" #include "src/codegen/signature.h" #include "src/wasm/module-decoder.h" #include "src/wasm/struct-types.h" #include "src/wasm/wasm-arguments.h" #include "src/wasm/wasm-engine.h" #include "src/wasm/wasm-module-builder.h" #include "src/wasm/wasm-module.h" #include "src/wasm/wasm-objects-inl.h" #include "src/wasm/wasm-opcodes.h" #include "test/cctest/cctest.h" #include "test/common/wasm/test-signatures.h" #include "test/common/wasm/wasm-macro-gen.h" #include "test/common/wasm/wasm-module-runner.h" #include "test/common/wasm/wasm-run-utils.h" namespace v8 { namespace internal { namespace wasm { namespace test_gc { using F = std::pair; class WasmGCTester { public: explicit WasmGCTester( TestExecutionTier execution_tier = TestExecutionTier::kTurbofan) : flag_liftoff(&v8::internal::v8_flags.liftoff, execution_tier == TestExecutionTier::kLiftoff), flag_liftoff_only(&v8::internal::v8_flags.liftoff_only, execution_tier == TestExecutionTier::kLiftoff), flag_wasm_dynamic_tiering(&v8::internal::v8_flags.wasm_dynamic_tiering, v8::internal::v8_flags.liftoff_only != true), flag_tierup(&v8::internal::v8_flags.wasm_tier_up, false), // Manually apply flag implication by disabling deopts in case of // --no-liftoff. flag_wasm_deopt(&v8::internal::v8_flags.wasm_deopt, v8_flags.wasm_deopt && v8_flags.liftoff), zone_(&allocator, ZONE_NAME), builder_(&zone_), isolate_(CcTest::InitIsolateOnce()), scope(isolate_), thrower(isolate_, "Test wasm GC") { } uint8_t AddGlobal(ValueType type, bool mutability, WasmInitExpr init) { return builder_.AddGlobal(type, mutability, init); } uint8_t DefineFunction(FunctionSig* sig, std::initializer_list locals, std::initializer_list code) { return DefineFunctionImpl(builder_.AddFunction(sig), locals, code); } uint8_t DefineFunction(ModuleTypeIndex sig_index, std::initializer_list locals, std::initializer_list code) { return DefineFunctionImpl(builder_.AddFunction(sig_index), locals, code); } void DefineExportedFunction(const char* name, FunctionSig* sig, std::initializer_list code) { WasmFunctionBuilder* fun = builder_.AddFunction(sig); fun->EmitCode(code); builder_.AddExport(base::CStrVector(name), fun); } MaybeDirectHandle CallExportedFunction( const char* name, base::Vector> args) { DirectHandle func = testing::GetExportedFunction(isolate_, instance_object_, name) .ToHandleChecked(); return Execution::Call(isolate_, func, isolate_->factory()->undefined_value(), args); } HeapType DefineStruct(std::initializer_list fields, ModuleTypeIndex supertype = kNoSuperType, bool is_final = false) { StructType::Builder type_builder( &zone_, static_cast(fields.size()), false, SharedFlag{false}); for (F field : fields) { type_builder.AddField(field.first, field.second); } return HeapType::Index( builder_.AddStructType(type_builder.Build(), is_final, supertype), SharedFlag{false}, RefTypeKind::kStruct); } HeapType DefineArray(ValueType element_type, bool mutability, ModuleTypeIndex supertype = kNoSuperType, bool is_final = false) { return HeapType::Index( builder_.AddArrayType(zone_.New(element_type, mutability), is_final, supertype), SharedFlag{false}, RefTypeKind::kArray); } HeapType DefineSignature(FunctionSig* sig, ModuleTypeIndex supertype = kNoSuperType, bool is_final = false) { return HeapType::Index(builder_.ForceAddSignature(sig, is_final, supertype), SharedFlag{false}, RefTypeKind::kFunction); } uint8_t DefineTable(ValueType type, uint32_t min_size, uint32_t max_size) { return builder_.AddTable(type, min_size, max_size); } void CompileModule() { ZoneBuffer buffer(&zone_); builder_.WriteTo(&buffer); MaybeDirectHandle maybe_instance = testing::CompileAndInstantiateForTesting(isolate_, &thrower, base::VectorOf(buffer)); if (thrower.error()) FATAL("%s", thrower.error_msg()); instance_object_ = maybe_instance.ToHandleChecked(); trusted_instance_data_ = direct_handle(instance_object_->trusted_data(isolate_), isolate_); } void CheckResult(uint32_t function_index, int32_t expected) { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK(EquivalentNumericSig(sig, sigs.i_v())); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); CheckResultImpl(function_index, sig, &packer, expected); } void CheckResult(uint32_t function_index, int32_t expected, int32_t arg) { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK(EquivalentNumericSig(sig, sigs.i_i())); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); packer.Push(arg); CheckResultImpl(function_index, sig, &packer, expected); } MaybeDirectHandle GetResultObject(uint32_t function_index) { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK_EQ(sig->parameter_count(), 0); DCHECK_EQ(sig->return_count(), 1); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); CallFunctionImpl(function_index, sig, &packer); CHECK(!isolate_->has_exception()); packer.Reset(); return direct_handle(Tagged(packer.Pop
()), isolate_); } MaybeDirectHandle GetResultObject(uint32_t function_index, int32_t arg) { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK_EQ(sig->parameter_count(), 1); DCHECK_EQ(sig->return_count(), 1); DCHECK(sig->parameters()[0] == kWasmI32); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); packer.Push(arg); CallFunctionImpl(function_index, sig, &packer); CHECK(!isolate_->has_exception()); packer.Reset(); return direct_handle(Tagged(packer.Pop
()), isolate_); } void CheckHasThrown(uint32_t function_index, const char* expected = "") { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK_EQ(sig->parameter_count(), 0); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); CheckHasThrownImpl(function_index, sig, &packer, expected); } void CheckHasThrown(uint32_t function_index, int32_t arg, const char* expected = "") { const CanonicalSig* sig = LookupCanonicalSigFor(function_index); DCHECK_EQ(sig->parameter_count(), 1); DCHECK(sig->parameters()[0] == kWasmI32); CWasmArgumentsPacker packer(CWasmArgumentsPacker::TotalSize(sig)); packer.Push(arg); CheckHasThrownImpl(function_index, sig, &packer, expected); } bool HasSimdSupport(TestExecutionTier tier) const { #if V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_IA32 // Liftoff does not have a fallback for executing SIMD instructions if // SSE4_1 is not available. if (tier == TestExecutionTier::kLiftoff && !CpuFeatures::IsSupported(SSE4_1)) { return false; } #endif USE(tier); return true; } DirectHandle instance_object() const { return instance_object_; } DirectHandle trusted_instance_data() const { return trusted_instance_data_; } Isolate* isolate() const { return isolate_; } WasmModuleBuilder* builder() { return &builder_; } Zone* zone() { return &zone_; } TestSignatures sigs; private: const FlagScope flag_liftoff; const FlagScope flag_liftoff_only; const FlagScope flag_wasm_dynamic_tiering; const FlagScope flag_tierup; const FlagScope flag_wasm_deopt; const CanonicalSig* LookupCanonicalSigFor(uint32_t function_index) const { auto* module = instance_object_->trusted_data(isolate_)->module(); CanonicalTypeIndex sig_id = module->canonical_sig_id(module->functions[function_index].sig_index); return GetTypeCanonicalizer()->LookupFunctionSignature(sig_id); } uint8_t DefineFunctionImpl(WasmFunctionBuilder* fun, std::initializer_list locals, std::initializer_list code) { for (ValueType local : locals) { fun->AddLocal(local); } fun->EmitCode(code); return fun->func_index(); } void CheckResultImpl(uint32_t function_index, const CanonicalSig* sig, CWasmArgumentsPacker* packer, int32_t expected) { CallFunctionImpl(function_index, sig, packer); if (isolate_->has_exception()) { DirectHandle message = ErrorUtils::ToString(isolate_, direct_handle(isolate_->exception(), isolate_)) .ToHandleChecked(); FATAL("%s", message->ToCString().get()); } packer->Reset(); CHECK_EQ(expected, packer->Pop()); } void CheckHasThrownImpl(uint32_t function_index, const CanonicalSig* sig, CWasmArgumentsPacker* packer, const char* expected) { CallFunctionImpl(function_index, sig, packer); CHECK(isolate_->has_exception()); DirectHandle message = ErrorUtils::ToString(isolate_, direct_handle(isolate_->exception(), isolate_)) .ToHandleChecked(); std::string message_str(message->ToCString().get()); CHECK_NE(message_str.find(expected), std::string::npos); isolate_->clear_exception(); } void CallFunctionImpl(uint32_t function_index, const CanonicalSig* sig, CWasmArgumentsPacker* packer) { // The signature must be canonicalized. DCHECK(GetTypeCanonicalizer()->Contains(sig)); WasmCodeRefScope code_ref_scope; WasmCodePointer wasm_call_target = trusted_instance_data_->GetCallTarget(function_index); DirectHandle object_ref = instance_object_; DirectHandle c_wasm_entry = compiler::CompileCWasmEntry(isolate_, sig); Execution::CallWasm(isolate_, c_wasm_entry, wasm_call_target, object_ref, packer->argv()); } v8::internal::AccountingAllocator allocator; Zone zone_; WasmModuleBuilder builder_; Isolate* const isolate_; const HandleScope scope; DirectHandle instance_object_; DirectHandle trusted_instance_data_; ErrorThrower thrower; }; ValueType ref(HeapType type_index) { return ValueType::Ref(type_index); } ValueType refNull(HeapType type_index) { return ValueType::RefNull(type_index); } WASM_COMPILED_EXEC_TEST(WasmBasicStruct) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); HeapType empty_struct = tester.DefineStruct({}); const ModuleTypeIndex empty_struct_index = empty_struct.ref_index(); ValueType kRefType = ref(type); ValueType kEmptyStructType = ref(empty_struct); ValueType kRefNullType = refNull(type); FunctionSig sig_q_v(1, 0, &kRefType); FunctionSig sig_qe_v(1, 0, &kEmptyStructType); // Test struct.new and struct.get. const uint8_t kGet1 = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_STRUCT_GET( type_index, 0, WASM_STRUCT_NEW(type_index, WASM_I32V(42), WASM_I32V(64))), kExprEnd}); // Test struct.new and struct.get. const uint8_t kGet2 = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_STRUCT_GET( type_index, 1, WASM_STRUCT_NEW(type_index, WASM_I32V(42), WASM_I32V(64))), kExprEnd}); // Test struct.new, returning struct reference. const uint8_t kGetStruct = tester.DefineFunction( &sig_q_v, {}, {WASM_STRUCT_NEW(type_index, WASM_I32V(42), WASM_I32V(64)), kExprEnd}); const uint8_t kGetStructNominal = tester.DefineFunction( &sig_q_v, {}, {WASM_STRUCT_NEW_DEFAULT(type_index), WASM_DROP, WASM_STRUCT_NEW(type_index, WASM_I32V(42), WASM_I32V(64)), kExprEnd}); // Test struct.new, returning reference to an empty struct. const uint8_t kGetEmptyStruct = tester.DefineFunction( &sig_qe_v, {}, {WASM_GC_OP(kExprStructNew), ToByte(empty_struct_index), kExprEnd}); // Test struct.set, struct refs types in locals. const uint8_t j_local_index = 0; const uint8_t j_field_index = 0; const uint8_t kSet = tester.DefineFunction( tester.sigs.i_v(), {kRefNullType}, {WASM_LOCAL_SET(j_local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(42), WASM_I32V(64))), WASM_STRUCT_SET(type_index, j_field_index, WASM_LOCAL_GET(j_local_index), WASM_I32V(-99)), WASM_STRUCT_GET(type_index, j_field_index, WASM_LOCAL_GET(j_local_index)), kExprEnd}); const uint8_t kNullDereference = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_STRUCT_GET(type_index, 0, WASM_REF_NULL(type_index)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kGet1, 42); tester.CheckResult(kGet2, 64); CHECK(IsWasmStruct(*tester.GetResultObject(kGetStruct).ToHandleChecked())); CHECK(IsWasmStruct( *tester.GetResultObject(kGetStructNominal).ToHandleChecked())); CHECK( IsWasmStruct(*tester.GetResultObject(kGetEmptyStruct).ToHandleChecked())); tester.CheckResult(kSet, -99); tester.CheckHasThrown(kNullDereference); } // Test struct.get, ref.as_non_null and ref-typed globals. WASM_COMPILED_EXEC_TEST(WasmRefAsNonNull) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType kRefTypes[] = {ref(type)}; ValueType kRefNullType = refNull(type); FunctionSig sig_q_v(1, 0, kRefTypes); const uint8_t global_index = tester.AddGlobal(kRefNullType, true, WasmInitExpr::RefNullConst(type)); const uint8_t field_index = 0; const uint8_t kNonNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_GLOBAL_SET(global_index, WASM_STRUCT_NEW(type_index, WASM_I32V(55), WASM_I32V(66))), WASM_STRUCT_GET(type_index, field_index, WASM_REF_AS_NON_NULL(WASM_GLOBAL_GET(global_index))), kExprEnd}); const uint8_t kNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_GLOBAL_SET(global_index, WASM_REF_NULL(type_index)), WASM_STRUCT_GET(type_index, field_index, WASM_REF_AS_NON_NULL(WASM_GLOBAL_GET(global_index))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kNonNull, 55); tester.CheckHasThrown(kNull); } WASM_COMPILED_EXEC_TEST(WasmRefAsNonNullSkipCheck) { FlagScope no_check(&v8_flags.wasm_skip_null_checks, true); WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType kRefType = ref(type); FunctionSig sig_q_v(1, 0, &kRefType); const uint8_t global_index = tester.AddGlobal(refNull(type), true, WasmInitExpr::RefNullConst(type)); const uint8_t kFunc = tester.DefineFunction( &sig_q_v, {}, {WASM_GLOBAL_SET(global_index, WASM_REF_NULL(type_index)), WASM_REF_AS_NON_NULL(WASM_GLOBAL_GET(global_index)), kExprEnd}); tester.CompileModule(); DirectHandle result = tester.GetResultObject(kFunc).ToHandleChecked(); // Without null checks, ref.as_non_null can actually return null. CHECK(IsWasmNull(*result)); } WASM_COMPILED_EXEC_TEST(WasmBrOnNull) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType kRefTypes[] = {ref(type)}; ValueType kRefNullType = refNull(type); FunctionSig sig_q_v(1, 0, kRefTypes); const uint8_t local_index = 0; const uint8_t kTaken = tester.DefineFunction( tester.sigs.i_v(), {kRefNullType}, {WASM_BLOCK_I(WASM_I32V(42), // Branch will be taken. // 42 left on stack outside the block (not 52). WASM_BR_ON_NULL(0, WASM_LOCAL_GET(local_index)), WASM_I32V(52), WASM_BR(0)), kExprEnd}); const uint8_t field_index = 0; const uint8_t kNotTaken = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_I( WASM_I32V(42), WASM_STRUCT_GET( type_index, field_index, // Branch will not be taken. // 52 left on stack outside the block (not 42). WASM_BR_ON_NULL(0, WASM_STRUCT_NEW(type_index, WASM_I32V(52), WASM_I32V(62)))), WASM_BR(0)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kTaken, 42); tester.CheckResult(kNotTaken, 52); } WASM_COMPILED_EXEC_TEST(WasmBrOnNonNull) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType kRefType = ref(type); ValueType kRefNullType = refNull(type); FunctionSig sig_q_v(1, 0, &kRefType); const uint8_t field_index = 0; const uint8_t kTaken = tester.DefineFunction( tester.sigs.i_v(), {kRefNullType, kRefNullType}, {WASM_LOCAL_SET( 0, WASM_STRUCT_NEW(type_index, WASM_I32V(52), WASM_I32V(62))), WASM_LOCAL_SET( 1, WASM_STRUCT_NEW(type_index, WASM_I32V(11), WASM_I32V(22))), WASM_STRUCT_GET(type_index, field_index, WASM_BLOCK_R(ref(type), // Branch will be taken, and the block will // return struct(52, 62). WASM_BR_ON_NON_NULL(0, WASM_LOCAL_GET(0)), WASM_REF_AS_NON_NULL(WASM_LOCAL_GET(1)))), kExprEnd}); const uint8_t kNotTaken = tester.DefineFunction( tester.sigs.i_v(), {kRefNullType, kRefNullType}, {WASM_LOCAL_SET(0, WASM_REF_NULL(type_index)), WASM_LOCAL_SET( 1, WASM_STRUCT_NEW(type_index, WASM_I32V(11), WASM_I32V(22))), WASM_STRUCT_GET(type_index, field_index, WASM_BLOCK_R(ref(type), // Branch will not be taken, and the block // will return struct(11, 22). WASM_BR_ON_NON_NULL(0, WASM_LOCAL_GET(0)), WASM_REF_AS_NON_NULL(WASM_LOCAL_GET(1)))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kTaken, 52); tester.CheckResult(kNotTaken, 11); } WASM_COMPILED_EXEC_TEST(RefCast) { WasmGCTester tester(execution_tier); HeapType supertype = tester.DefineStruct({F(kWasmI32, true)}); const ModuleTypeIndex supertype_index = supertype.ref_index(); HeapType subtype1 = tester.DefineStruct( {F(kWasmI32, true), F(kWasmF32, false)}, supertype_index); const ModuleTypeIndex subtype1_index = subtype1.ref_index(); HeapType subtype2 = tester.DefineStruct( {F(kWasmI32, true), F(kWasmI64, false)}, supertype_index); const ModuleTypeIndex subtype2_index = subtype2.ref_index(); auto super_sig = FixedSizeSignature::Params(ValueType::RefNull(subtype1)) .Returns(ValueType::RefNull(supertype)); auto sub_sig1 = FixedSizeSignature::Params(ValueType::RefNull(supertype)) .Returns(ValueType::RefNull(subtype1)); auto sub_sig2 = FixedSizeSignature::Params(ValueType::RefNull(supertype)) .Returns(ValueType::RefNull(subtype2)); HeapType function_type = tester.DefineSignature(&super_sig); const ModuleTypeIndex function_type_index = function_type.ref_index(); HeapType function_subtype1 = tester.DefineSignature(&sub_sig1, function_type_index); const ModuleTypeIndex function_subtype1_index = function_subtype1.ref_index(); HeapType function_subtype2 = tester.DefineSignature(&sub_sig2, function_type_index); const ModuleTypeIndex function_subtype2_index = function_subtype2.ref_index(); const uint8_t function_index = tester.DefineFunction( function_subtype1_index, {}, {WASM_STRUCT_NEW(subtype1_index, WASM_I32V(10), WASM_F32(20)), WASM_END}); // Just so this function counts as "declared". tester.AddGlobal(ValueType::RefNull(function_type), false, WasmInitExpr::RefFuncConst(function_index)); const uint8_t kTestSuccessful = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(supertype)}, {WASM_LOCAL_SET( 0, WASM_STRUCT_NEW(subtype1_index, WASM_I32V(10), WASM_F32(20))), WASM_STRUCT_GET(subtype1_index, 0, WASM_REF_CAST(WASM_LOCAL_GET(0), subtype1_index)), WASM_END}); const uint8_t kTestFailed = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(supertype)}, {WASM_LOCAL_SET( 0, WASM_STRUCT_NEW(subtype1_index, WASM_I32V(10), WASM_F32(20))), WASM_STRUCT_GET(subtype2_index, 0, WASM_REF_CAST(WASM_LOCAL_GET(0), subtype2_index)), WASM_END}); const uint8_t kFuncTestSuccessfulSuper = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(function_type)}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(function_index)), WASM_REF_CAST(WASM_LOCAL_GET(0), function_type_index), WASM_DROP, WASM_I32V(0), WASM_END}); const uint8_t kFuncTestSuccessfulSub = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(function_type)}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(function_index)), WASM_REF_CAST(WASM_LOCAL_GET(0), function_subtype1_index), WASM_DROP, WASM_I32V(0), WASM_END}); const uint8_t kFuncTestFailed = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(function_type)}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(function_index)), WASM_REF_CAST(WASM_LOCAL_GET(0), function_subtype2_index), WASM_DROP, WASM_I32V(1), WASM_END}); tester.CompileModule(); tester.CheckResult(kTestSuccessful, 10); tester.CheckHasThrown(kTestFailed); tester.CheckResult(kFuncTestSuccessfulSuper, 0); tester.CheckResult(kFuncTestSuccessfulSub, 0); tester.CheckHasThrown(kFuncTestFailed); } WASM_COMPILED_EXEC_TEST(RefCastNoChecks) { FlagScope scope(&v8_flags.wasm_assume_ref_cast_succeeds, true); WasmGCTester tester(execution_tier); HeapType supertype = tester.DefineStruct({F(kWasmI32, true)}); const ModuleTypeIndex supertype_index = supertype.ref_index(); HeapType subtype1 = tester.DefineStruct( {F(kWasmI32, true), F(kWasmF32, true)}, supertype_index); const ModuleTypeIndex subtype1_index = subtype1.ref_index(); const uint8_t kTestSuccessful = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(supertype)}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(subtype1_index)), WASM_STRUCT_GET(subtype1_index, 0, WASM_REF_CAST(WASM_LOCAL_GET(0), subtype1_index)), WASM_END}); tester.CompileModule(); tester.CheckResult(kTestSuccessful, 0); } WASM_COMPILED_EXEC_TEST(RefCastAbstractNoChecks) { FlagScope scope(&v8_flags.wasm_assume_ref_cast_succeeds, true); WasmGCTester tester(execution_tier); HeapType struct_type = tester.DefineStruct({F(kWasmI32, true)}); const ModuleTypeIndex struct_index = struct_type.ref_index(); const uint8_t kTestSuccessful = tester.DefineFunction( tester.sigs.i_v(), {kWasmAnyRef}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(struct_index)), WASM_STRUCT_GET( struct_index, 0, WASM_REF_CAST(WASM_REF_CAST(WASM_LOCAL_GET(0), kStructRefCode), struct_index)), WASM_END}); tester.CompileModule(); tester.CheckResult(kTestSuccessful, 0); } WASM_COMPILED_EXEC_TEST(BrOnCast) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); HeapType other_type = tester.DefineStruct({F(kWasmF32, true)}); const ModuleTypeIndex other_type_index = other_type.ref_index(); const uint8_t kTestStructStatic = tester.DefineFunction( tester.sigs.i_v(), {kWasmI32, kWasmStructRef}, {WASM_BLOCK_R( ValueType::RefNull(type), WASM_LOCAL_SET(0, WASM_I32V(111)), // Pipe a struct through a local so it's statically typed // as structref. WASM_LOCAL_SET(1, WASM_STRUCT_NEW(other_type_index, WASM_F32(1.0))), WASM_LOCAL_GET(1), // The type check fails, so this branch isn't taken. WASM_BR_ON_CAST(0, kStructRefCode, type_index), WASM_DROP, WASM_LOCAL_SET(0, WASM_I32V(221)), // (Final result) - 1 WASM_LOCAL_SET(1, WASM_STRUCT_NEW(type_index, WASM_I32V(1))), WASM_LOCAL_GET(1), // This branch is taken. WASM_BR_ON_CAST(0, kStructRefCode, type_index), WASM_GC_OP(kExprRefCast), ToByte(type_index), // Not executed due to the branch. WASM_LOCAL_SET(0, WASM_I32V(333))), WASM_GC_OP(kExprStructGet), ToByte(type_index), 0, WASM_LOCAL_GET(0), kExprI32Add, kExprEnd}); const uint8_t kTestStructStaticNull = tester.DefineFunction( tester.sigs.i_v(), {kWasmI32, kWasmStructRef}, {WASM_BLOCK_R( ValueType::RefNull(type), WASM_LOCAL_SET(0, WASM_I32V(111)), // Pipe a struct through a local so it's statically typed as // structref. WASM_LOCAL_SET(1, WASM_STRUCT_NEW(other_type_index, WASM_F32(1.0))), WASM_LOCAL_GET(1), // The type check fails, so this branch isn't taken. WASM_BR_ON_CAST(0, kStructRefCode, type_index), WASM_DROP, WASM_LOCAL_SET(0, WASM_I32V(221)), // (Final result) - 1 WASM_LOCAL_SET(1, WASM_STRUCT_NEW(type_index, WASM_I32V(1))), WASM_LOCAL_GET(1), // This branch is taken. WASM_BR_ON_CAST_NULL(0, kStructRefCode, type_index), WASM_GC_OP(kExprRefCast), ToByte(type_index), // Not executed due to the branch. WASM_LOCAL_SET(0, WASM_I32V(333))), WASM_GC_OP(kExprStructGet), ToByte(type_index), 0, WASM_LOCAL_GET(0), kExprI32Add, kExprEnd}); const uint8_t kTestNull = tester.DefineFunction( tester.sigs.i_v(), {kWasmI32, kWasmStructRef}, {WASM_BLOCK_R(ValueType::RefNull(type), WASM_LOCAL_SET(0, WASM_I32V(111)), WASM_LOCAL_GET(1), // Put a nullref onto the value stack. // Not taken for nullref. WASM_BR_ON_CAST(0, kStructRefCode, type_index), WASM_GC_OP(kExprRefCast), ToByte(type_index)), // Traps WASM_DROP, WASM_LOCAL_GET(0), kExprEnd}); // "br_on_cast null" also branches on null, treating it as a successful cast. const uint8_t kTestNullNull = tester.DefineFunction( tester.sigs.i_v(), {kWasmI32, kWasmStructRef}, {WASM_BLOCK_R(ValueType::RefNull(type), WASM_LOCAL_SET(0, WASM_I32V(111)), WASM_LOCAL_GET(1), // Put a nullref onto the value stack. // Taken for nullref with br_on_cast null. WASM_BR_ON_CAST_NULL(0, kStructRefCode, type_index), WASM_GC_OP(kExprRefCast), ToByte(type_index)), WASM_DROP, WASM_LOCAL_GET(0), kExprEnd}); const uint8_t kTypedAfterBranch = tester.DefineFunction( tester.sigs.i_v(), {kWasmI32, kWasmStructRef}, {WASM_LOCAL_SET(1, WASM_STRUCT_NEW(type_index, WASM_I32V(42))), WASM_BLOCK_I( // The inner block should take the early branch with a struct // on the stack. WASM_BLOCK_R(ValueType::Ref(type), WASM_LOCAL_GET(1), WASM_BR_ON_CAST(0, kStructRefCode, type_index), // Returning 123 is the unreachable failure case. WASM_I32V(123), WASM_BR(1)), // The outer block catches the struct left behind by the inner block // and reads its field. WASM_GC_OP(kExprStructGet), ToByte(type_index), 0), kExprEnd}); tester.CompileModule(); tester.CheckResult(kTestStructStatic, 222); tester.CheckResult(kTestStructStaticNull, 222); tester.CheckHasThrown(kTestNull); tester.CheckResult(kTestNullNull, 111); tester.CheckResult(kTypedAfterBranch, 42); } WASM_COMPILED_EXEC_TEST(BrOnCastFail) { WasmGCTester tester(execution_tier); HeapType heaptype0 = tester.DefineStruct({F(kWasmI32, true)}); const ModuleTypeIndex type0 = heaptype0.ref_index(); HeapType heaptype1 = tester.DefineStruct({F(kWasmI64, true), F(kWasmI32, true)}); const ModuleTypeIndex type1 = heaptype1.ref_index(); const int field0_value = 5; const int field1_value = 25; const int null_value = 45; // local_0 = value; // if (!(local_0 instanceof type0)) goto block1; // return static_cast(local_0).field_0; // block1: // if (local_0 == nullptr) goto block2; // return static_cast(local_0).field_1; // block2: // return null_value; #define FUNCTION_BODY(value) \ WASM_LOCAL_SET(0, WASM_SEQ(value)), \ WASM_BLOCK(WASM_BLOCK_R(kWasmStructRef, WASM_LOCAL_GET(0), \ WASM_BR_ON_CAST_FAIL(0, kStructRefCode, type0), \ WASM_GC_OP(kExprStructGet), ToByte(type0), 0, \ kExprReturn), \ kExprBrOnNull, 0, WASM_GC_OP(kExprRefCast), ToByte(type1), \ WASM_GC_OP(kExprStructGet), ToByte(type1), 1, kExprReturn), \ WASM_I32V(null_value), kExprEnd const uint8_t kBranchTaken = tester.DefineFunction( tester.sigs.i_v(), {kWasmStructRef}, {FUNCTION_BODY( WASM_STRUCT_NEW(type1, WASM_I64V(10), WASM_I32V(field1_value)))}); const uint8_t kBranchNotTaken = tester.DefineFunction( tester.sigs.i_v(), {kWasmStructRef}, {FUNCTION_BODY(WASM_STRUCT_NEW(type0, WASM_I32V(field0_value)))}); const uint8_t kNull = tester.DefineFunction(tester.sigs.i_v(), {kWasmStructRef}, {FUNCTION_BODY(WASM_REF_NULL(type0))}); const uint8_t kUnrelatedTypes = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(heaptype1)}, {FUNCTION_BODY( WASM_STRUCT_NEW(type1, WASM_I64V(10), WASM_I32V(field1_value)))}); #undef FUNCTION_BODY const uint8_t kBranchTakenStatic = tester.DefineFunction( tester.sigs.i_v(), {kWasmStructRef}, {WASM_LOCAL_SET( 0, WASM_STRUCT_NEW(type1, WASM_I64V(10), WASM_I32V(field1_value))), WASM_BLOCK(WASM_BLOCK_R(kWasmStructRef, WASM_LOCAL_GET(0), WASM_BR_ON_CAST_FAIL(0, kStructRefCode, type0), WASM_GC_OP(kExprStructGet), ToByte(type0), 0, kExprReturn), kExprBrOnNull, 0, WASM_GC_OP(kExprRefCast), ToByte(type1), WASM_GC_OP(kExprStructGet), ToByte(type1), 1, kExprReturn), WASM_I32V(null_value), kExprEnd}); tester.CompileModule(); tester.CheckResult(kBranchTaken, field1_value); tester.CheckResult(kBranchTakenStatic, field1_value); tester.CheckResult(kBranchNotTaken, field0_value); tester.CheckResult(kNull, null_value); tester.CheckResult(kUnrelatedTypes, field1_value); } WASM_COMPILED_EXEC_TEST(WasmRefEq) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(kWasmI32, true), F(kWasmI32, true)}); ModuleTypeIndex type_index = type.ref_index(); ValueType kRefTypes[] = {ref(type)}; ValueType kRefNullType = refNull(type); FunctionSig sig_q_v(1, 0, kRefTypes); uint8_t local_index = 0; const uint8_t kFunc = tester.DefineFunction( tester.sigs.i_v(), {kRefNullType}, {WASM_LOCAL_SET(local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(55), WASM_I32V(66))), WASM_I32_ADD( WASM_I32_SHL( WASM_REF_EQ( // true WASM_LOCAL_GET(local_index), WASM_LOCAL_GET(local_index)), WASM_I32V(0)), WASM_I32_ADD( WASM_I32_SHL(WASM_REF_EQ( // false WASM_LOCAL_GET(local_index), WASM_STRUCT_NEW(type_index, WASM_I32V(55), WASM_I32V(66))), WASM_I32V(1)), WASM_I32_ADD(WASM_I32_SHL( // false WASM_REF_EQ(WASM_LOCAL_GET(local_index), WASM_REF_NULL(type_index)), WASM_I32V(2)), WASM_I32_SHL(WASM_REF_EQ( // true WASM_REF_NULL(type_index), WASM_REF_NULL(type_index)), WASM_I32V(3))))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kFunc, 0b1001); } WASM_COMPILED_EXEC_TEST(WasmPackedStructU) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct( {F(kWasmI8, true), F(kWasmI16, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType struct_type = refNull(type); const uint8_t local_index = 0; int32_t expected_output_0 = 0x1234; int32_t expected_output_1 = -1; const uint8_t kF0 = tester.DefineFunction( tester.sigs.i_v(), {struct_type}, {WASM_LOCAL_SET(local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(expected_output_0), WASM_I32V(expected_output_1), WASM_I32V(0x12345678))), WASM_STRUCT_GET_U(type_index, 0, WASM_LOCAL_GET(local_index)), kExprEnd}); const uint8_t kF1 = tester.DefineFunction( tester.sigs.i_v(), {struct_type}, {WASM_LOCAL_SET(local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(expected_output_0), WASM_I32V(expected_output_1), WASM_I32V(0x12345678))), WASM_STRUCT_GET_U(type_index, 1, WASM_LOCAL_GET(local_index)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kF0, static_cast(expected_output_0)); tester.CheckResult(kF1, static_cast(expected_output_1)); } WASM_COMPILED_EXEC_TEST(WasmPackedStructS) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct( {F(kWasmI8, true), F(kWasmI16, true), F(kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType struct_type = refNull(type); const uint8_t local_index = 0; int32_t expected_output_0 = 0x80; int32_t expected_output_1 = 42; const uint8_t kF0 = tester.DefineFunction( tester.sigs.i_v(), {struct_type}, {WASM_LOCAL_SET( local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(expected_output_0), WASM_I32V(expected_output_1), WASM_I32V(0))), WASM_STRUCT_GET_S(type_index, 0, WASM_LOCAL_GET(local_index)), kExprEnd}); const uint8_t kF1 = tester.DefineFunction( tester.sigs.i_v(), {struct_type}, {WASM_LOCAL_SET(local_index, WASM_STRUCT_NEW(type_index, WASM_I32V(0x80), WASM_I32V(expected_output_1), WASM_I32V(0))), WASM_STRUCT_GET_S(type_index, 1, WASM_LOCAL_GET(local_index)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kF0, static_cast(expected_output_0)); tester.CheckResult(kF1, static_cast(expected_output_1)); } WASM_COMPILED_EXEC_TEST(WasmBasicArray) { WasmGCTester tester(execution_tier); if (!tester.HasSimdSupport(execution_tier)) return; HeapType type = tester.DefineArray(wasm::kWasmI32, true); const ModuleTypeIndex type_index = type.ref_index(); HeapType fp_type = tester.DefineArray(wasm::kWasmF64, true); const ModuleTypeIndex fp_type_index = fp_type.ref_index(); HeapType immut_type = tester.DefineArray(wasm::kWasmI32, false); const ModuleTypeIndex immut_type_index = immut_type.ref_index(); ValueType kRefTypes[] = {ref(type)}; FunctionSig sig_q_v(1, 0, kRefTypes); ValueType kRefNullType = refNull(type); // f: a = [12, 12, 12]; a[1] = 42; return a[arg0] const uint8_t local_index = 1; const uint8_t kGetElem = tester.DefineFunction( tester.sigs.i_i(), {kRefNullType}, {WASM_LOCAL_SET(local_index, WASM_ARRAY_NEW(type_index, WASM_I32V(12), WASM_I32V(3))), WASM_ARRAY_SET(type_index, WASM_LOCAL_GET(local_index), WASM_I32V(1), WASM_I32V(42)), WASM_ARRAY_GET(type_index, WASM_LOCAL_GET(local_index), WASM_LOCAL_GET(0)), kExprEnd}); // Reads and returns an array's length. const uint8_t kGetLength = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_ARRAY_LEN(WASM_ARRAY_NEW(type_index, WASM_I32V(0), WASM_I32V(42))), kExprEnd}); // Create an array of length 2, initialized to [42, 42]. const uint8_t kAllocate = tester.DefineFunction( &sig_q_v, {}, {WASM_ARRAY_NEW(type_index, WASM_I32V(42), WASM_I32V(2)), kExprEnd}); const uint8_t kAllocateStatic = tester.DefineFunction( &sig_q_v, {}, {WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(2)), WASM_DROP, WASM_ARRAY_NEW(type_index, WASM_I32V(42), WASM_I32V(2)), kExprEnd}); const uint8_t kInit = tester.DefineFunction(&sig_q_v, {}, {WASM_ARRAY_NEW_FIXED(type_index, 3, WASM_I32V(10), WASM_I32V(20), WASM_I32V(30)), kExprEnd}); const uint8_t kImmutable = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_ARRAY_GET(immut_type_index, WASM_ARRAY_NEW_FIXED(immut_type_index, 2, WASM_I32V(42), WASM_I32V(43)), WASM_I32V(0)), kExprEnd}); const uint32_t kLongLength = 1u << 16; const uint8_t kAllocateLarge = tester.DefineFunction( &sig_q_v, {}, {WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(kLongLength)), kExprEnd}); ArrayType array_type(kWasmI32, true); const uint32_t kTooLong = WasmArray::MaxLength(&array_type) + 1; const uint8_t kAllocateTooLarge = tester.DefineFunction( &sig_q_v, {}, {WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(kTooLong)), kExprEnd}); // Tests that fp arrays work properly. // f: a = [10.0, 10.0, 10.0]; a[1] = 42.42; return static_cast(a[1]); double result_value = 42.42; const uint8_t kTestFpArray = tester.DefineFunction( tester.sigs.i_v(), {refNull(fp_type)}, {WASM_LOCAL_SET( 0, WASM_ARRAY_NEW(fp_type_index, WASM_F64(10.0), WASM_I32V(3))), WASM_ARRAY_SET(fp_type_index, WASM_LOCAL_GET(0), WASM_I32V(1), WASM_F64(result_value)), WASM_I32_SCONVERT_F64( WASM_ARRAY_GET(fp_type_index, WASM_LOCAL_GET(0), WASM_I32V(1))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kGetElem, 12, 0); tester.CheckResult(kGetElem, 42, 1); tester.CheckResult(kGetElem, 12, 2); tester.CheckHasThrown(kGetElem, 3); tester.CheckHasThrown(kGetElem, -1); tester.CheckResult(kGetLength, 42); tester.CheckResult(kImmutable, 42); tester.CheckResult(kTestFpArray, static_cast(result_value)); DirectHandle h_result = tester.GetResultObject(kAllocate).ToHandleChecked(); CHECK(IsWasmArray(*h_result)); CHECK_EQ(2, Cast(h_result)->length()); h_result = tester.GetResultObject(kAllocateStatic).ToHandleChecked(); CHECK(IsWasmArray(*h_result)); CHECK_EQ(2, Cast(h_result)->length()); DirectHandle init_result = tester.GetResultObject(kInit).ToHandleChecked(); CHECK(IsWasmArray(*init_result)); CHECK_EQ(3, Cast(init_result)->length()); CHECK_EQ(10, Cast(init_result)->GetElement(0).to_i32()); CHECK_EQ(20, Cast(init_result)->GetElement(1).to_i32()); CHECK_EQ(30, Cast(init_result)->GetElement(2).to_i32()); MaybeDirectHandle maybe_large_result = tester.GetResultObject(kAllocateLarge); DirectHandle large_result = maybe_large_result.ToHandleChecked(); CHECK(IsWasmArray(*large_result)); CHECK(Cast(large_result)->Size() > kMaxRegularHeapObjectSize); tester.CheckHasThrown(kAllocateTooLarge, "requested new array is too large"); } WASM_COMPILED_EXEC_TEST(WasmPackedArrayU) { WasmGCTester tester(execution_tier); HeapType array = tester.DefineArray(kWasmI8, true); const ModuleTypeIndex array_index = array.ref_index(); ValueType array_type = refNull(array); const uint8_t param_index = 0; const uint8_t local_index = 1; int32_t expected_output_3 = 258; const uint8_t kF = tester.DefineFunction( tester.sigs.i_i(), {array_type}, {WASM_LOCAL_SET(local_index, WASM_ARRAY_NEW(array_index, WASM_I32V(0), WASM_I32V(4))), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(0), WASM_I32V(1)), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(1), WASM_I32V(10)), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(2), WASM_I32V(200)), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(3), WASM_I32V(expected_output_3)), WASM_ARRAY_GET_U(array_index, WASM_LOCAL_GET(local_index), WASM_LOCAL_GET(param_index)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kF, 1, 0); tester.CheckResult(kF, 10, 1); tester.CheckResult(kF, 200, 2); // Only the 2 lsb's of 258 should be stored in the array. tester.CheckResult(kF, static_cast(expected_output_3), 3); } WASM_COMPILED_EXEC_TEST(WasmPackedArrayS) { WasmGCTester tester(execution_tier); HeapType array = tester.DefineArray(kWasmI16, true); const ModuleTypeIndex array_index = array.ref_index(); ValueType array_type = refNull(array); int32_t array_elements[] = {0x12345678, 10, 0xFEDC, 0xFF1234}; const uint8_t param_index = 0; const uint8_t local_index = 1; const uint8_t kF = tester.DefineFunction( tester.sigs.i_i(), {array_type}, {WASM_LOCAL_SET(local_index, WASM_ARRAY_NEW(array_index, WASM_I32V(array_elements[0]), WASM_I32V(4))), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(1), WASM_I32V(array_elements[1])), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(2), WASM_I32V(array_elements[2])), WASM_ARRAY_SET(array_index, WASM_LOCAL_GET(local_index), WASM_I32V(3), WASM_I32V(array_elements[3])), WASM_ARRAY_GET_S(array_index, WASM_LOCAL_GET(local_index), WASM_LOCAL_GET(param_index)), kExprEnd}); tester.CompileModule(); // Exactly the 2 lsb's should be stored by array.new. tester.CheckResult(kF, static_cast(array_elements[0]), 0); tester.CheckResult(kF, static_cast(array_elements[1]), 1); // Sign should be extended. tester.CheckResult(kF, static_cast(array_elements[2]), 2); // Exactly the 2 lsb's should be stored by array.set. tester.CheckResult(kF, static_cast(array_elements[3]), 3); } WASM_COMPILED_EXEC_TEST(WasmArrayCopy) { WasmGCTester tester(execution_tier); HeapType array32 = tester.DefineArray(kWasmI32, true); const ModuleTypeIndex array32_index = array32.ref_index(); HeapType array16 = tester.DefineArray(kWasmI16, true); const ModuleTypeIndex array16_index = array16.ref_index(); HeapType arrayref = tester.DefineArray(refNull(array32), true); const ModuleTypeIndex arrayref_index = arrayref.ref_index(); // Copies i32 ranges: local1[0..3] to local2[6..9]. const uint8_t kCopyI32 = tester.DefineFunction( tester.sigs.i_i(), {refNull(array32), refNull(array32)}, {WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_ARRAY_SET(array32_index, WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(0)), WASM_ARRAY_SET(array32_index, WASM_LOCAL_GET(1), WASM_I32V(1), WASM_I32V(1)), WASM_ARRAY_SET(array32_index, WASM_LOCAL_GET(1), WASM_I32V(2), WASM_I32V(2)), WASM_ARRAY_SET(array32_index, WASM_LOCAL_GET(1), WASM_I32V(3), WASM_I32V(3)), WASM_LOCAL_SET(2, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_ARRAY_COPY(array32_index, array32_index, WASM_LOCAL_GET(2), WASM_I32V(6), WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(4)), WASM_ARRAY_GET(array32_index, WASM_LOCAL_GET(2), WASM_LOCAL_GET(0)), kExprEnd}); // Copies i16 ranges: local1[0..3] to local2[6..9]. const uint8_t kCopyI16 = tester.DefineFunction( tester.sigs.i_i(), {refNull(array16), refNull(array16)}, {WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(array16_index, WASM_I32V(10))), WASM_ARRAY_SET(array16_index, WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(0)), WASM_ARRAY_SET(array16_index, WASM_LOCAL_GET(1), WASM_I32V(1), WASM_I32V(1)), WASM_ARRAY_SET(array16_index, WASM_LOCAL_GET(1), WASM_I32V(2), WASM_I32V(2)), WASM_ARRAY_SET(array16_index, WASM_LOCAL_GET(1), WASM_I32V(3), WASM_I32V(3)), WASM_LOCAL_SET(2, WASM_ARRAY_NEW_DEFAULT(array16_index, WASM_I32V(10))), WASM_ARRAY_COPY(array16_index, array16_index, WASM_LOCAL_GET(2), WASM_I32V(6), WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(4)), WASM_ARRAY_GET_S(array16_index, WASM_LOCAL_GET(2), WASM_LOCAL_GET(0)), kExprEnd}); // Copies reference ranges: local1[0..3] to local2[6..9]. const uint8_t kCopyRef = tester.DefineFunction( FunctionSig::Build(tester.zone(), {refNull(array32)}, {kWasmI32}), {refNull(arrayref), refNull(arrayref)}, {WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(arrayref_index, WASM_I32V(10))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(0), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(6))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(1), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(7))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(2), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(8))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(3), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(9))), WASM_LOCAL_SET(2, WASM_ARRAY_NEW_DEFAULT(arrayref_index, WASM_I32V(10))), WASM_ARRAY_COPY(arrayref_index, arrayref_index, WASM_LOCAL_GET(2), WASM_I32V(6), WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(4)), WASM_ARRAY_GET(arrayref_index, WASM_LOCAL_GET(2), WASM_LOCAL_GET(0)), kExprEnd}); // Copies overlapping reference ranges: local1[0..3] to local1[2..5]. const uint8_t kCopyRefOverlapping = tester.DefineFunction( FunctionSig::Build(tester.zone(), {refNull(array32)}, {kWasmI32}), {refNull(arrayref)}, {WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(arrayref_index, WASM_I32V(10))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(0), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(2))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(1), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(3))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(2), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(4))), WASM_ARRAY_SET(arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(3), WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(5))), WASM_ARRAY_COPY(arrayref_index, arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(2), WASM_LOCAL_GET(1), WASM_I32V(0), WASM_I32V(4)), WASM_ARRAY_GET(arrayref_index, WASM_LOCAL_GET(1), WASM_LOCAL_GET(0)), kExprEnd}); const uint8_t kOobSource = tester.DefineFunction( tester.sigs.v_v(), {refNull(array32), refNull(array32)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_ARRAY_COPY(array32_index, array32_index, WASM_LOCAL_GET(1), WASM_I32V(6), WASM_LOCAL_GET(0), WASM_I32V(8), WASM_I32V(4)), kExprEnd}); const uint8_t kOobDestination = tester.DefineFunction( tester.sigs.v_v(), {refNull(array32), refNull(array32)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(array32_index, WASM_I32V(10))), WASM_ARRAY_COPY(array32_index, array32_index, WASM_LOCAL_GET(1), WASM_I32V(6), WASM_LOCAL_GET(0), WASM_I32V(3), WASM_I32V(5)), kExprEnd}); const uint8_t kZeroLength = tester.DefineFunction( tester.sigs.i_v(), {refNull(arrayref), refNull(arrayref)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(arrayref_index, WASM_I32V(10))), WASM_LOCAL_SET(1, WASM_ARRAY_NEW_DEFAULT(arrayref_index, WASM_I32V(10))), WASM_ARRAY_COPY(arrayref_index, arrayref_index, WASM_LOCAL_GET(1), WASM_I32V(6), WASM_LOCAL_GET(0), WASM_I32V(3), WASM_I32V(0)), WASM_I32V(0), kExprEnd}); tester.CompileModule(); tester.CheckResult(kCopyI32, 0, 5); tester.CheckResult(kCopyI32, 0, 6); tester.CheckResult(kCopyI32, 1, 7); tester.CheckResult(kCopyI32, 2, 8); tester.CheckResult(kCopyI32, 3, 9); tester.CheckResult(kCopyI16, 0, 5); tester.CheckResult(kCopyI16, 0, 6); tester.CheckResult(kCopyI16, 1, 7); tester.CheckResult(kCopyI16, 2, 8); tester.CheckResult(kCopyI16, 3, 9); { DirectHandle result5 = tester.GetResultObject(kCopyRef, 5).ToHandleChecked(); CHECK(IsWasmNull(*result5)); for (int i = 6; i <= 9; i++) { DirectHandle res = tester.GetResultObject(kCopyRef, i).ToHandleChecked(); CHECK(IsWasmArray(*res)); CHECK_EQ(Cast(res)->length(), static_cast(i)); } } CHECK(IsWasmNull( *tester.GetResultObject(kCopyRefOverlapping, 6).ToHandleChecked())); DirectHandle res0 = tester.GetResultObject(kCopyRefOverlapping, 0).ToHandleChecked(); CHECK(IsWasmArray(*res0)); CHECK_EQ(Cast(res0)->length(), static_cast(2)); for (int i = 2; i <= 5; i++) { DirectHandle res = tester.GetResultObject(kCopyRefOverlapping, i).ToHandleChecked(); CHECK(IsWasmArray(*res)); CHECK_EQ(Cast(res)->length(), static_cast(i)); } tester.CheckHasThrown(kOobSource); tester.CheckHasThrown(kOobDestination); tester.CheckResult(kZeroLength, 0); // Does not throw. } WASM_COMPILED_EXEC_TEST(NewDefault) { WasmGCTester tester(execution_tier); if (!tester.HasSimdSupport(execution_tier)) return; tester.builder()->StartRecursiveTypeGroup(); HeapType struct_heaptype = tester.DefineStruct( {F(wasm::kWasmI32, true), F(wasm::kWasmF64, true), F(ValueType::RefNull(ModuleTypeIndex{0}, SharedFlag{false}, RefTypeKind::kStruct), true)}); tester.builder()->EndRecursiveTypeGroup(); ModuleTypeIndex struct_type = struct_heaptype.ref_index(); HeapType array_heaptype = tester.DefineArray(wasm::kWasmI32, true); ModuleTypeIndex array_type = array_heaptype.ref_index(); // Returns: struct[0] + f64_to_i32(struct[1]) + (struct[2].is_null ^ 1) == 0. const uint8_t allocate_struct = tester.DefineFunction( tester.sigs.i_v(), {refNull(struct_heaptype)}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(struct_type)), WASM_I32_ADD( WASM_I32_ADD(WASM_STRUCT_GET(struct_type, 0, WASM_LOCAL_GET(0)), WASM_I32_SCONVERT_F64(WASM_STRUCT_GET( struct_type, 1, WASM_LOCAL_GET(0)))), WASM_I32_XOR(WASM_REF_IS_NULL( WASM_STRUCT_GET(struct_type, 2, WASM_LOCAL_GET(0))), WASM_I32V(1))), kExprEnd}); const uint8_t allocate_array = tester.DefineFunction( tester.sigs.i_v(), {refNull(array_heaptype)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(array_type, WASM_I32V(2))), WASM_I32_ADD( WASM_ARRAY_GET(array_type, WASM_LOCAL_GET(0), WASM_I32V(0)), WASM_ARRAY_GET(array_type, WASM_LOCAL_GET(0), WASM_I32V(1))), kExprEnd}); tester.CompileModule(); tester.CheckResult(allocate_struct, 0); tester.CheckResult(allocate_array, 0); } WASM_COMPILED_EXEC_TEST(RefTrivialCastsStatic) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(wasm::kWasmI32, true)}); ModuleTypeIndex type_index = type.ref_index(); HeapType subtype = tester.DefineStruct( {F(wasm::kWasmI32, true), F(wasm::kWasmS128, true)}, type_index); ModuleTypeIndex subtype_index = subtype.ref_index(); HeapType subtype2 = tester.DefineStruct( {F(wasm::kWasmI32, true), F(wasm::kWasmF64, true)}, type_index); ModuleTypeIndex subtype2_index = subtype2.ref_index(); const uint8_t kRefTestNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(type_index), subtype_index), kExprEnd}); // Upcasts should be optimized away for nominal types. const uint8_t kRefTestUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_STRUCT_NEW_DEFAULT(subtype_index), type_index), kExprEnd}); const uint8_t kRefTestUpcastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(subtype_index), type_index), kExprEnd}); const uint8_t kRefTestUnrelatedNullable = tester.DefineFunction( tester.sigs.i_v(), {refNull(subtype)}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(subtype_index)), WASM_REF_TEST(WASM_LOCAL_GET(0), subtype2_index), kExprEnd}); const uint8_t kRefTestUnrelatedNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(subtype_index), subtype2_index), kExprEnd}); const uint8_t kRefTestUnrelatedNonNullable = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_STRUCT_NEW_DEFAULT(type_index), subtype2_index), kExprEnd}); const uint8_t kRefCastNull = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(type_index), subtype_index)), kExprEnd}); const uint8_t kRefCastUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL( WASM_REF_CAST(WASM_STRUCT_NEW_DEFAULT(subtype_index), type_index)), kExprEnd}); const uint8_t kRefCastUpcastNull = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(subtype_index), type_index)), kExprEnd}); const uint8_t kBrOnCastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(subtype), WASM_REF_NULL(type_index), WASM_BR_ON_CAST(0, type_index, subtype_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); // Real upcasts are invalid for br_on_cast. Casting to the same type is // however similar to an upcast. const uint8_t kBrOnCastUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(type), WASM_STRUCT_NEW_DEFAULT(type_index), WASM_BR_ON_CAST(0, type_index, type_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); const uint8_t kBrOnCastUpcastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(type), WASM_REF_NULL(type_index), WASM_BR_ON_CAST(0, type_index, type_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); const uint8_t kBrOnCastFailNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(type), WASM_REF_NULL(type_index), WASM_BR_ON_CAST_FAIL(0, type_index, subtype_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); // Real upcasts are invalid for br_on_cast. Casting to the same type is // however similar to an upcast. const uint8_t kBrOnCastFailUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(subtype), WASM_STRUCT_NEW_DEFAULT(subtype_index), WASM_BR_ON_CAST_FAIL(0, subtype_index, subtype_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); const uint8_t kBrOnCastFailUpcastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_BLOCK_R(refNull(subtype), WASM_REF_NULL(subtype_index), WASM_BR_ON_CAST_FAIL(0, subtype_index, subtype_index), WASM_DROP, WASM_RETURN(WASM_I32V(0))), WASM_DROP, WASM_I32V(1), WASM_END}); tester.CompileModule(); tester.CheckResult(kRefTestNull, 0); tester.CheckResult(kRefTestUpcast, 1); tester.CheckResult(kRefTestUpcastNull, 0); tester.CheckResult(kRefTestUnrelatedNullable, 0); tester.CheckResult(kRefTestUnrelatedNull, 0); tester.CheckResult(kRefTestUnrelatedNonNullable, 0); tester.CheckHasThrown(kRefCastNull); tester.CheckResult(kRefCastUpcast, 0); tester.CheckHasThrown(kRefCastUpcastNull); tester.CheckResult(kBrOnCastNull, 0); tester.CheckResult(kBrOnCastUpcast, 1); tester.CheckResult(kBrOnCastUpcastNull, 0); tester.CheckResult(kBrOnCastFailNull, 1); tester.CheckResult(kBrOnCastFailUpcast, 0); tester.CheckResult(kBrOnCastFailUpcastNull, 1); } WASM_COMPILED_EXEC_TEST(TrivialAbstractCasts) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineArray(wasm::kWasmI32, true); ModuleTypeIndex type_index = type.ref_index(); HeapType struct_type = tester.DefineStruct({F(wasm::kWasmI32, true)}); ModuleTypeIndex struct_type_index = struct_type.ref_index(); ValueType sig_types[] = {kWasmS128, kWasmI32, kWasmF64}; FunctionSig sig(1, 2, sig_types); const uint8_t kIsArrayNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(kAnyRefCode), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(10)), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUpcastNullable = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(type)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(10))), WASM_REF_TEST(WASM_LOCAL_GET(0), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUpcastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(type_index), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUnrelated = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(struct_type)}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(struct_type_index)), WASM_REF_TEST(WASM_LOCAL_GET(0), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUnrelatedNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(kI31RefCode), kArrayRefCode), kExprEnd}); const uint8_t kIsArrayUnrelatedNonNullable = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_I31(WASM_I32V(10)), kArrayRefCode), kExprEnd}); const uint8_t kAsArrayNull = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(kAnyRefCode), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUpcast = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(10)), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUpcastNullable = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(type)}, {WASM_LOCAL_SET(0, WASM_ARRAY_NEW_DEFAULT(type_index, WASM_I32V(10))), WASM_REF_IS_NULL(WASM_REF_CAST(WASM_LOCAL_GET(0), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUpcastNull = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(type_index), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUnrelated = tester.DefineFunction( tester.sigs.i_v(), {ValueType::RefNull(struct_type)}, {WASM_LOCAL_SET(0, WASM_STRUCT_NEW_DEFAULT(struct_type_index)), WASM_REF_IS_NULL(WASM_REF_CAST(WASM_LOCAL_GET(0), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUnrelatedNull = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(kI31RefCode), kArrayRefCode)), kExprEnd}); const uint8_t kAsArrayUnrelatedNonNullable = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_I31(WASM_I32V(10)), kArrayRefCode)), kExprEnd}); tester.CompileModule(); tester.CheckResult(kIsArrayNull, 0); tester.CheckResult(kIsArrayUpcast, 1); tester.CheckResult(kIsArrayUpcastNullable, 1); tester.CheckResult(kIsArrayUpcastNull, 0); tester.CheckResult(kIsArrayUnrelated, 0); tester.CheckResult(kIsArrayUnrelatedNull, 0); tester.CheckResult(kIsArrayUnrelatedNonNullable, 0); tester.CheckHasThrown(kAsArrayNull); tester.CheckResult(kAsArrayUpcast, 0); tester.CheckResult(kAsArrayUpcastNullable, 0); tester.CheckHasThrown(kAsArrayUpcastNull); tester.CheckHasThrown(kAsArrayUnrelated); tester.CheckHasThrown(kAsArrayUnrelatedNull); tester.CheckHasThrown(kAsArrayUnrelatedNonNullable); } WASM_COMPILED_EXEC_TEST(ArrayNewMap) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineArray(kWasmI32, true); const ModuleTypeIndex type_index = type.ref_index(); ValueType array_type = ValueType::Ref(type); FunctionSig sig(1, 0, &array_type); const uint8_t array_new = tester.DefineFunction( &sig, {}, {WASM_ARRAY_NEW(type_index, WASM_I32V(10), WASM_I32V(42)), kExprEnd}); tester.CompileModule(); DirectHandle result = tester.GetResultObject(array_new).ToHandleChecked(); CHECK(IsWasmArray(*result)); CHECK_EQ(Cast(result)->map(), tester.trusted_instance_data()->managed_object_maps()->get( type_index.index)); } WASM_COMPILED_EXEC_TEST(FunctionRefs) { WasmGCTester tester(execution_tier); const uint8_t func_index = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_I32V(42), kExprEnd}); const ModuleTypeIndex sig_index{0}; HeapType sig = HeapType::Index(sig_index, SharedFlag{false}, RefTypeKind::kFunction); HeapType other_sig = tester.DefineSignature(tester.sigs.d_d()); const ModuleTypeIndex other_sig_index = other_sig.ref_index(); // This is just so func_index counts as "declared". tester.AddGlobal(ValueType::RefNull(sig), false, WasmInitExpr::RefFuncConst(func_index)); ValueType func_type = ValueType::RefNull(sig); FunctionSig sig_func(1, 0, &func_type); const uint8_t cast = tester.DefineFunction( &sig_func, {kWasmFuncRef}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(func_index)), WASM_REF_CAST(WASM_LOCAL_GET(0), sig_index), kExprEnd}); const uint8_t cast_reference = tester.DefineFunction( &sig_func, {}, {WASM_REF_FUNC(func_index), kExprEnd}); const uint8_t test = tester.DefineFunction( tester.sigs.i_v(), {kWasmFuncRef}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(func_index)), WASM_REF_TEST(WASM_LOCAL_GET(0), sig_index), kExprEnd}); const uint8_t test_fail = tester.DefineFunction( tester.sigs.i_v(), {kWasmFuncRef}, {WASM_LOCAL_SET(0, WASM_REF_FUNC(func_index)), WASM_REF_TEST(WASM_LOCAL_GET(0), other_sig_index), kExprEnd}); tester.CompileModule(); i::Isolate* i_isolate = CcTest::i_isolate(); DirectHandle result_cast = tester.GetResultObject(cast).ToHandleChecked(); CHECK(IsWasmFuncRef(*result_cast)); DirectHandle result_cast_internal{ Cast(*result_cast)->internal(i_isolate), i_isolate}; DirectHandle cast_function = WasmInternalFunction::GetOrCreateExternal(result_cast_internal); DirectHandle result_cast_reference = tester.GetResultObject(cast_reference).ToHandleChecked(); CHECK(IsWasmFuncRef(*result_cast_reference)); DirectHandle result_cast_reference_internal{ Cast(*result_cast_reference)->internal(i_isolate), i_isolate}; DirectHandle cast_function_reference = WasmInternalFunction::GetOrCreateExternal(result_cast_reference_internal); CHECK_EQ(cast_function->code(i_isolate)->instruction_start(), cast_function_reference->code(i_isolate)->instruction_start()); tester.CheckResult(test, 1); tester.CheckResult(test_fail, 0); } WASM_COMPILED_EXEC_TEST(CallRef) { WasmGCTester tester(execution_tier); HeapType sig = tester.DefineSignature(tester.sigs.i_ii()); ModuleTypeIndex sig_index = sig.ref_index(); uint8_t callee = tester.DefineFunction( sig_index, {}, {WASM_I32_ADD(WASM_LOCAL_GET(0), WASM_LOCAL_GET(1)), kExprEnd}); uint8_t caller = tester.DefineFunction(tester.sigs.i_i(), {}, {WASM_CALL_REF(WASM_REF_FUNC(callee), sig_index, WASM_I32V(42), WASM_LOCAL_GET(0)), kExprEnd}); // This is just so func_index counts as "declared". tester.AddGlobal(ValueType::RefNull(sig), false, WasmInitExpr::RefFuncConst(callee)); tester.CompileModule(); tester.CheckResult(caller, 47, 5); } // Test that calling a function expecting any ref accepts the abstract null // type argument (nullref, nullfuncref, nullexternref). WASM_COMPILED_EXEC_TEST(CallAbstractNullTypeImplicitConversion) { HeapType struct0 = HeapType::Index(ModuleTypeIndex{0}, SharedFlag{false}, RefTypeKind::kStruct); HeapType array1 = HeapType::Index(ModuleTypeIndex{1}, SharedFlag{false}, RefTypeKind::kArray); HeapType func2 = HeapType::Index(ModuleTypeIndex{2}, SharedFlag{false}, RefTypeKind::kFunction); const struct { ValueType super_type; ValueTypeCode sub_type_code; } null_ref_types[] = { {kWasmFuncRef, kNoFuncCode}, // -- {kWasmEqRef, kNoneCode}, // -- {kWasmI31Ref, kNoneCode}, // -- {kWasmStructRef, kNoneCode}, // -- {kWasmArrayRef, kNoneCode}, // -- {kWasmAnyRef, kNoneCode}, // -- {kWasmExternRef, kNoExternCode}, // -- {kWasmExnRef, kNoExnCode}, // -- {refNull(struct0), kNoneCode}, // -- {refNull(array1), kNoneCode}, // -- {refNull(func2), kNoFuncCode}, // -- }; for (auto [super_type, sub_type_code] : null_ref_types) { CHECK(super_type.is_nullable()); WasmGCTester tester(execution_tier); HeapType struct_type = tester.DefineStruct({F(wasm::kWasmI32, true)}); CHECK_EQ(struct_type, struct0); HeapType array_type = tester.DefineArray(kWasmI32, true); CHECK_EQ(array_type, array1); ValueType i32 = kWasmI32; FunctionSig dummySig(1, 0, &i32); HeapType sig_type = tester.DefineSignature(&dummySig); CHECK_EQ(sig_type, func2); ValueType ref_sig_types[] = {kWasmI32, super_type}; FunctionSig sig_ref(1, 1, ref_sig_types); uint8_t callee = tester.DefineFunction( &sig_ref, {}, {WASM_REF_IS_NULL(WASM_LOCAL_GET(0)), kExprEnd}); uint8_t caller = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_FUNCTION(callee, WASM_REF_NULL(sub_type_code)), kExprEnd}); tester.CompileModule(); tester.CheckResult(caller, 1); } } WASM_COMPILED_EXEC_TEST(CastNullRef) { WasmGCTester tester(execution_tier); uint8_t to_non_null = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_AS_NON_NULL(WASM_REF_NULL(kNoneCode))), kExprEnd}); uint8_t to_array = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST(WASM_REF_NULL(kNoneCode), kArrayRefCode)), kExprEnd}); uint8_t to_struct = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST( WASM_REF_NULL(kNoneCode), kStructRefCode)), kExprEnd}); uint8_t to_i31 = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST(WASM_REF_NULL(kNoneCode), kI31RefCode)), kExprEnd}); ModuleTypeIndex struct_idx = tester.DefineStruct({F(wasm::kWasmI32, true)}).ref_index(); uint8_t to_struct_idx = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_REF_CAST(WASM_REF_NULL(kNoneCode), struct_idx)), kExprEnd}); tester.CompileModule(); // ref.cast traps on null. tester.CheckHasThrown(to_non_null); tester.CheckHasThrown(to_array); tester.CheckHasThrown(to_struct); tester.CheckHasThrown(to_i31); tester.CheckHasThrown(to_struct_idx); } WASM_COMPILED_EXEC_TEST(CallReftypeParameters) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(wasm::kWasmI32, true)}); ModuleTypeIndex type_index = type.ref_index(); ValueType kRefType{refNull(type)}; ValueType sig_types[] = {kWasmI32, kRefType, kRefType, kRefType, kRefType, kWasmI32, kWasmI32, kWasmI32, kWasmI32}; FunctionSig sig(1, 8, sig_types); uint8_t adder = tester.DefineFunction( &sig, {}, {WASM_I32_ADD( WASM_STRUCT_GET(type_index, 0, WASM_LOCAL_GET(0)), WASM_I32_ADD( WASM_STRUCT_GET(type_index, 0, WASM_LOCAL_GET(1)), WASM_I32_ADD( WASM_STRUCT_GET(type_index, 0, WASM_LOCAL_GET(2)), WASM_I32_ADD( WASM_STRUCT_GET(type_index, 0, WASM_LOCAL_GET(3)), WASM_I32_ADD( WASM_LOCAL_GET(4), WASM_I32_ADD(WASM_LOCAL_GET(5), WASM_I32_ADD(WASM_LOCAL_GET(6), WASM_LOCAL_GET(7)))))))), kExprEnd}); uint8_t caller = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_FUNCTION(adder, WASM_STRUCT_NEW(type_index, WASM_I32V(2)), WASM_STRUCT_NEW(type_index, WASM_I32V(4)), WASM_STRUCT_NEW(type_index, WASM_I32V(8)), WASM_STRUCT_NEW(type_index, WASM_I32V(16)), WASM_I32V(32), WASM_I32V(64), WASM_I32V(128), WASM_I32V(256)), kExprEnd}); tester.CompileModule(); tester.CheckResult(caller, 510); } WASM_COMPILED_EXEC_TEST(AbstractTypeChecks) { WasmGCTester tester(execution_tier); HeapType array = tester.DefineArray(kWasmI32, true); ModuleTypeIndex array_index = array.ref_index(); HeapType struct_type = tester.DefineStruct({F(kWasmI32, true)}); ModuleTypeIndex struct_index = struct_type.ref_index(); uint8_t function_index = tester.DefineFunction(tester.sigs.v_v(), {}, {kExprEnd}); ModuleTypeIndex sig_index{2}; HeapType sig = HeapType::Index(sig_index, SharedFlag{false}, RefTypeKind::kFunction); // This is just so func_index counts as "declared". tester.AddGlobal(ValueType::RefNull(sig), false, WasmInitExpr::RefFuncConst(function_index)); uint8_t kStructCheckNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(kAnyRefCode), kStructRefCode), kExprEnd}); uint8_t kArrayCheckNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(kAnyRefCode), kArrayRefCode), kExprEnd}); uint8_t kI31CheckNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_TEST(WASM_REF_NULL(kAnyRefCode), kI31RefCode), kExprEnd}); uint8_t kStructCastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_CAST(WASM_REF_NULL(kAnyRefCode), kStructRefCode), WASM_DROP, WASM_I32V(1), kExprEnd}); uint8_t kArrayCastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_CAST(WASM_REF_NULL(kAnyRefCode), kArrayRefCode), WASM_DROP, WASM_I32V(1), kExprEnd}); uint8_t kI31CastNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_CAST(WASM_REF_NULL(kAnyRefCode), kI31RefCode), WASM_DROP, WASM_I32V(1), kExprEnd}); #define TYPE_CHECK(type, value) \ tester.DefineFunction( \ tester.sigs.i_v(), {kWasmAnyRef}, \ {WASM_LOCAL_SET(0, WASM_SEQ(value)), \ WASM_REF_TEST(WASM_LOCAL_GET(0), k##type##RefCode), kExprEnd}) uint8_t kStructCheckSuccess = TYPE_CHECK(Struct, WASM_STRUCT_NEW_DEFAULT(struct_index)); uint8_t kStructCheckFailure = TYPE_CHECK(Struct, WASM_REF_I31(WASM_I32V(42))); uint8_t kArrayCheckSuccess = TYPE_CHECK(Array, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); uint8_t kArrayCheckFailure = TYPE_CHECK(Array, WASM_STRUCT_NEW_DEFAULT(struct_index)); uint8_t kI31CheckSuccess = TYPE_CHECK(I31, WASM_REF_I31(WASM_I32V(42))); uint8_t kI31CheckFailure = TYPE_CHECK(I31, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); #undef TYPE_CHECK #define TYPE_CAST(type, value) \ tester.DefineFunction(tester.sigs.i_v(), {kWasmAnyRef}, \ {WASM_LOCAL_SET(0, WASM_SEQ(value)), \ WASM_REF_CAST(WASM_LOCAL_GET(0), k##type##RefCode), \ WASM_DROP, WASM_I32V(1), kExprEnd}) uint8_t kStructCastSuccess = TYPE_CAST(Struct, WASM_STRUCT_NEW_DEFAULT(struct_index)); uint8_t kStructCastFailure = TYPE_CAST(Struct, WASM_REF_I31(WASM_I32V(42))); uint8_t kArrayCastSuccess = TYPE_CAST(Array, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); uint8_t kArrayCastFailure = TYPE_CAST(Array, WASM_REF_I31(WASM_I32V(42))); uint8_t kI31CastSuccess = TYPE_CAST(I31, WASM_REF_I31(WASM_I32V(42))); uint8_t kI31CastFailure = TYPE_CAST(I31, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); #undef TYPE_CAST // If the branch is not taken, we return 0. If it is taken, then the respective // type check should succeed, and we return 1. #define BR_ON(type, value) \ tester.DefineFunction( \ tester.sigs.i_v(), {kWasmAnyRef}, \ {WASM_LOCAL_SET(0, WASM_SEQ(value)), \ WASM_REF_TEST( \ WASM_BLOCK_R(kWasm##type##Ref, WASM_LOCAL_GET(0), \ WASM_BR_ON_CAST(0, kAnyRefCode, k##type##RefCode), \ WASM_RETURN(WASM_I32V(0))), \ k##type##RefCode), \ kExprEnd}) uint8_t kBrOnStructTaken = BR_ON(Struct, WASM_STRUCT_NEW_DEFAULT(struct_index)); uint8_t kBrOnStructNotTaken = BR_ON(Struct, WASM_REF_NULL(kNoneCode)); uint8_t kBrOnArrayTaken = BR_ON(Array, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); uint8_t kBrOnArrayNotTaken = BR_ON(Array, WASM_REF_I31(WASM_I32V(42))); uint8_t kBrOnI31Taken = BR_ON(I31, WASM_REF_I31(WASM_I32V(42))); uint8_t kBrOnI31NotTaken = BR_ON(I31, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); #undef BR_ON // If the branch is not taken, we return 1. If it is taken, then the respective // type check should fail, and we return 0. #define BR_ON_NON(type, value) \ tester.DefineFunction( \ tester.sigs.i_v(), {kWasmAnyRef}, \ {WASM_LOCAL_SET(0, WASM_SEQ(value)), \ WASM_REF_TEST(WASM_BLOCK_R(kWasmAnyRef, WASM_LOCAL_GET(0), \ WASM_BR_ON_CAST_FAIL(0, kAnyRefCode, \ k##type##RefCode), \ WASM_RETURN(WASM_I32V(1))), \ k##type##RefCode), \ kExprEnd}) uint8_t kBrOnNonStructNotTaken = BR_ON_NON(Struct, WASM_STRUCT_NEW_DEFAULT(struct_index)); uint8_t kBrOnNonStructTaken = BR_ON_NON(Struct, WASM_REF_NULL(kNoneCode)); uint8_t kBrOnNonArrayNotTaken = BR_ON_NON(Array, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); uint8_t kBrOnNonArrayTaken = BR_ON_NON(Array, WASM_REF_I31(WASM_I32V(42))); uint8_t kBrOnNonI31NotTaken = BR_ON_NON(I31, WASM_REF_I31(WASM_I32V(42))); uint8_t kBrOnNonI31Taken = BR_ON_NON(I31, WASM_ARRAY_NEW_DEFAULT(array_index, WASM_I32V(10))); #undef BR_ON_NON tester.CompileModule(); tester.CheckResult(kStructCheckNull, 0); tester.CheckResult(kArrayCheckNull, 0); tester.CheckResult(kI31CheckNull, 0); tester.CheckHasThrown(kStructCastNull); tester.CheckHasThrown(kArrayCastNull); tester.CheckHasThrown(kI31CastNull); tester.CheckResult(kStructCheckSuccess, 1); tester.CheckResult(kArrayCheckSuccess, 1); tester.CheckResult(kI31CheckSuccess, 1); tester.CheckResult(kStructCheckFailure, 0); tester.CheckResult(kArrayCheckFailure, 0); tester.CheckResult(kI31CheckFailure, 0); tester.CheckResult(kStructCastSuccess, 1); tester.CheckResult(kArrayCastSuccess, 1); tester.CheckResult(kI31CastSuccess, 1); tester.CheckHasThrown(kStructCastFailure); tester.CheckHasThrown(kArrayCastFailure); tester.CheckHasThrown(kI31CastFailure); tester.CheckResult(kBrOnStructTaken, 1); tester.CheckResult(kBrOnStructNotTaken, 0); tester.CheckResult(kBrOnArrayTaken, 1); tester.CheckResult(kBrOnArrayNotTaken, 0); tester.CheckResult(kBrOnI31Taken, 1); tester.CheckResult(kBrOnI31NotTaken, 0); tester.CheckResult(kBrOnNonStructTaken, 0); tester.CheckResult(kBrOnNonStructNotTaken, 1); tester.CheckResult(kBrOnNonArrayTaken, 0); tester.CheckResult(kBrOnNonArrayNotTaken, 1); tester.CheckResult(kBrOnNonI31Taken, 0); tester.CheckResult(kBrOnNonI31NotTaken, 1); } // This flushed out a few bugs, so it serves as a regression test. It can also // be modified (made to run longer) to measure performance of casts. WASM_COMPILED_EXEC_TEST(CastsBenchmark) { WasmGCTester tester(execution_tier); HeapType super_type = tester.DefineStruct({F(wasm::kWasmI32, true)}); const ModuleTypeIndex SuperType = super_type.ref_index(); HeapType sub_type = tester.DefineStruct( {F(wasm::kWasmI32, true), F(wasm::kWasmI32, true)}, SuperType); const ModuleTypeIndex SubType = sub_type.ref_index(); HeapType list_type = tester.DefineArray(kWasmStructRef, true); const ModuleTypeIndex ListType = list_type.ref_index(); const uint8_t List = tester.AddGlobal(ValueType::RefNull(list_type), true, WasmInitExpr::RefNullConst(list_type)); const uint32_t kListLength = 1024; const uint32_t i = 0; const uint8_t Prepare = tester.DefineFunction( tester.sigs.i_v(), {wasm::kWasmI32}, {// List = new eqref[kListLength]; WASM_GLOBAL_SET( List, WASM_ARRAY_NEW_DEFAULT(ListType, WASM_I32V(kListLength))), // for (int i = 0; i < kListLength; ) { // List[i] = new Super(i); // i++; // List[i] = new Sub(i, 0); // i++; // } WASM_LOCAL_SET(i, WASM_I32V_1(0)), WASM_LOOP( WASM_ARRAY_SET(ListType, WASM_GLOBAL_GET(List), WASM_LOCAL_GET(i), WASM_STRUCT_NEW(SuperType, WASM_LOCAL_GET(i))), WASM_LOCAL_SET(i, WASM_I32_ADD(WASM_LOCAL_GET(i), WASM_I32V_1(1))), WASM_ARRAY_SET( ListType, WASM_GLOBAL_GET(List), WASM_LOCAL_GET(i), WASM_STRUCT_NEW(SubType, WASM_LOCAL_GET(i), WASM_I32V_1(0))), WASM_LOCAL_SET(i, WASM_I32_ADD(WASM_LOCAL_GET(i), WASM_I32V_1(1))), WASM_BR_IF(0, WASM_I32_NE(WASM_LOCAL_GET(i), WASM_I32V(kListLength)))), // return 42; // Dummy value, due to test framework. WASM_I32V_1(42), kExprEnd}); const uint32_t sum = 1; // Index of the local. const uint32_t list = 2; const uint32_t kLoops = 2; const uint32_t kIterations = kLoops * kListLength; const uint8_t Main = tester.DefineFunction( tester.sigs.i_v(), { wasm::kWasmI32, wasm::kWasmI32, ValueType::RefNull(list_type), }, {WASM_LOCAL_SET(list, WASM_GLOBAL_GET(List)), // sum = 0; WASM_LOCAL_SET(sum, WASM_I32V_1(0)), // for (int i = 0; i < kIterations; i++) { // sum += ref.cast(List[i & kListLength]).x // } WASM_LOCAL_SET(i, WASM_I32V_1(0)), WASM_LOOP( WASM_LOCAL_SET( sum, WASM_I32_ADD( WASM_LOCAL_GET(sum), WASM_STRUCT_GET( SuperType, 0, WASM_REF_CAST( WASM_ARRAY_GET( ListType, WASM_LOCAL_GET(list), WASM_I32_AND(WASM_LOCAL_GET(i), WASM_I32V(kListLength - 1))), SuperType)))), WASM_LOCAL_SET(i, WASM_I32_ADD(WASM_LOCAL_GET(i), WASM_I32V_1(1))), WASM_BR_IF(0, WASM_I32_LTS(WASM_LOCAL_GET(i), WASM_I32V(kIterations)))), // return sum; WASM_LOCAL_GET(sum), kExprEnd}); tester.CompileModule(); tester.CheckResult(Prepare, 42); // Time this section to get a benchmark for subtyping checks. // Note: if you bump kIterations or kListLength, you may have to take i32 // overflow into account. tester.CheckResult(Main, (kListLength * (kListLength - 1) / 2) * kLoops); } WASM_COMPILED_EXEC_TEST(GlobalInitReferencingGlobal) { WasmGCTester tester(execution_tier); const uint8_t from = tester.AddGlobal(kWasmI32, false, WasmInitExpr(42)); const uint8_t to = tester.AddGlobal(kWasmI32, false, WasmInitExpr::GlobalGet(from)); const uint8_t func = tester.DefineFunction(tester.sigs.i_v(), {}, {WASM_GLOBAL_GET(to), kExprEnd}); tester.CompileModule(); tester.CheckResult(func, 42); } WASM_COMPILED_EXEC_TEST(GCTables) { WasmGCTester tester(execution_tier); tester.builder()->StartRecursiveTypeGroup(); HeapType super_struct_type = tester.DefineStruct({F(kWasmI32, false)}); ModuleTypeIndex super_struct = super_struct_type.ref_index(); HeapType sub_struct_type = tester.DefineStruct( {F(kWasmI32, false), F(kWasmI32, true)}, super_struct); ModuleTypeIndex sub_struct = sub_struct_type.ref_index(); FunctionSig* super_sig = FunctionSig::Build(tester.zone(), {kWasmI32}, {refNull(sub_struct_type)}); HeapType super_sig_type = tester.DefineSignature(super_sig); ModuleTypeIndex super_sig_index = super_sig_type.ref_index(); FunctionSig* sub_sig = FunctionSig::Build(tester.zone(), {kWasmI32}, {refNull(super_struct_type)}); HeapType sub_sig_type = tester.DefineSignature(sub_sig, super_sig_index); ModuleTypeIndex sub_sig_index = sub_sig_type.ref_index(); HeapType unrelated_sig = tester.DefineSignature(sub_sig, super_sig_index); ModuleTypeIndex unrelated_sig_index = unrelated_sig.ref_index(); tester.builder()->EndRecursiveTypeGroup(); tester.DefineTable(refNull(super_sig_type), 10, 10); uint8_t super_func = tester.DefineFunction( super_sig_index, {}, {WASM_I32_ADD(WASM_STRUCT_GET(sub_struct, 0, WASM_LOCAL_GET(0)), WASM_STRUCT_GET(sub_struct, 1, WASM_LOCAL_GET(0))), WASM_END}); uint8_t sub_func = tester.DefineFunction( sub_sig_index, {}, {WASM_STRUCT_GET(super_struct, 0, WASM_LOCAL_GET(0)), WASM_END}); uint8_t setup_func = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_TABLE_SET(0, WASM_I32V(0), WASM_REF_NULL(super_sig_index)), WASM_TABLE_SET(0, WASM_I32V(1), WASM_REF_FUNC(super_func)), WASM_TABLE_SET(0, WASM_I32V(2), WASM_REF_FUNC(sub_func)), // -- WASM_I32V(0), WASM_END}); uint8_t super_struct_producer = tester.DefineFunction( FunctionSig::Build(tester.zone(), {ref(super_struct_type)}, {}), {}, {WASM_STRUCT_NEW(super_struct, WASM_I32V(-5)), WASM_END}); uint8_t sub_struct_producer = tester.DefineFunction( FunctionSig::Build(tester.zone(), {ref(sub_struct_type)}, {}), {}, {WASM_STRUCT_NEW(sub_struct, WASM_I32V(7), WASM_I32V(11)), WASM_END}); // Calling a null entry should trap. uint8_t call_null = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_INDIRECT(super_sig_index, WASM_CALL_FUNCTION0(sub_struct_producer), WASM_I32V(0)), WASM_END}); // Calling with a signature identical to the type of the table should work, // provided the entry has the same signature. uint8_t call_same_type = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_INDIRECT(super_sig_index, WASM_CALL_FUNCTION0(sub_struct_producer), WASM_I32V(1)), WASM_END}); // Calling with a signature that is a subtype of the type of the table should // work, provided the entry has the same signature. uint8_t call_subtype = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_INDIRECT(sub_sig_index, WASM_CALL_FUNCTION0(super_struct_producer), WASM_I32V(2)), WASM_END}); // Calling with a signature that is a subtype of the type of the table should // work, provided the entry has a subtype of the declared signature. uint8_t call_table_subtype_entry_subtype = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_INDIRECT(super_sig_index, WASM_CALL_FUNCTION0(sub_struct_producer), WASM_I32V(2)), WASM_END}); // Calling with a signature that is mismatched to that of the entry should // trap. uint8_t call_type_mismatch = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_INDIRECT(unrelated_sig_index, WASM_CALL_FUNCTION0(super_struct_producer), WASM_I32V(2)), WASM_END}); // Getting a table element and then calling it with call_ref should work. uint8_t table_get_and_call_ref = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_CALL_REF(WASM_TABLE_GET(0, WASM_I32V(2)), super_sig_index, WASM_CALL_FUNCTION0(sub_struct_producer)), WASM_END}); // Only here so these functions count as "declared". tester.AddGlobal(refNull(super_sig_type), false, WasmInitExpr::RefFuncConst(super_func)); tester.AddGlobal(refNull(sub_sig_type), false, WasmInitExpr::RefFuncConst(sub_func)); tester.CompileModule(); tester.CheckResult(setup_func, 0); tester.CheckHasThrown(call_null); tester.CheckResult(call_same_type, 18); tester.CheckResult(call_subtype, -5); tester.CheckResult(call_table_subtype_entry_subtype, 7); tester.CheckHasThrown(call_type_mismatch); tester.CheckResult(table_get_and_call_ref, 7); } WASM_COMPILED_EXEC_TEST(JsAccess) { WasmGCTester tester(execution_tier); HeapType type = tester.DefineStruct({F(wasm::kWasmI32, true)}); const ModuleTypeIndex type_index = type.ref_index(); ValueType kRefType = ref(type); ValueType kSupertypeToI[] = {kWasmI32, kWasmStructRef}; ValueType structref = kWasmStructRef; FunctionSig sig_t_v(1, 0, &kRefType); FunctionSig sig_super_v(1, 0, &structref); FunctionSig sig_i_super(1, 1, kSupertypeToI); tester.DefineExportedFunction( "typed_producer", &sig_t_v, {WASM_STRUCT_NEW(type_index, WASM_I32V(42)), kExprEnd}); // Same code, different signature. tester.DefineExportedFunction( "untyped_producer", &sig_super_v, {WASM_STRUCT_NEW(type_index, WASM_I32V(42)), kExprEnd}); tester.DefineExportedFunction( "consumer", &sig_i_super, {WASM_STRUCT_GET(type_index, 0, WASM_REF_CAST(WASM_LOCAL_GET(0), type_index)), kExprEnd}); tester.CompileModule(); Isolate* isolate = tester.isolate(); TryCatch try_catch(reinterpret_cast(isolate)); for (const char* producer : {"typed_producer", "untyped_producer"}) { MaybeDirectHandle maybe_result = tester.CallExportedFunction(producer, {}); if (maybe_result.is_null()) { FATAL("Calling %s failed: %s", producer, *v8::String::Utf8Value(reinterpret_cast(isolate), try_catch.Message()->Get())); } { DirectHandle args[] = {maybe_result.ToHandleChecked()}; maybe_result = tester.CallExportedFunction("consumer", base::VectorOf(args)); } if (maybe_result.is_null()) { FATAL("Calling 'consumer' failed: %s", *v8::String::Utf8Value(reinterpret_cast(isolate), try_catch.Message()->Get())); } DirectHandle result = maybe_result.ToHandleChecked(); CHECK(IsSmi(*result)); CHECK_EQ(42, Cast(*result).value()); // Calling {consumer} with any other object (e.g. the Smi we just got as // {result}) should trap. { DirectHandle args[] = {result}; maybe_result = tester.CallExportedFunction("consumer", base::VectorOf(args)); } CHECK(maybe_result.is_null()); CHECK(try_catch.HasCaught()); try_catch.Reset(); isolate->clear_exception(); } } WASM_COMPILED_EXEC_TEST(WasmAnyConvertExtern) { WasmGCTester tester(execution_tier); const uint8_t kNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL( WASM_GC_ANY_CONVERT_EXTERN(WASM_REF_NULL(kNoExternCode))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kNull, 1); } WASM_COMPILED_EXEC_TEST(WasmExternConvertAny) { WasmGCTester tester(execution_tier); const uint8_t kNull = tester.DefineFunction( tester.sigs.i_v(), {}, {WASM_REF_IS_NULL(WASM_GC_EXTERN_CONVERT_ANY(WASM_REF_NULL(kNoneCode))), kExprEnd}); tester.CompileModule(); tester.CheckResult(kNull, 1); } } // namespace test_gc } // namespace wasm } // namespace internal } // namespace v8