// Copyright 2015 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/unittests/test-utils.h" #include "src/v8.h" #include "src/wasm/ast-decoder.h" #include "src/wasm/encoder.h" namespace v8 { namespace internal { namespace wasm { class EncoderTest : public TestWithZone { protected: void AddLocal(WasmFunctionBuilder* f, LocalType type) { uint16_t index = f->AddLocal(type); const std::vector<uint8_t>& out_index = UnsignedLEB128From(index); std::vector<uint8_t> code; code.push_back(kExprGetLocal); for (size_t i = 0; i < out_index.size(); i++) { code.push_back(out_index.at(i)); } uint32_t local_indices[] = {1}; f->EmitCode(&code[0], static_cast<uint32_t>(code.size()), local_indices, 1); } void CheckReadValue(uint8_t* leb_value, uint32_t expected_result, int expected_length, ReadUnsignedLEB128ErrorCode expected_error_code) { int length; uint32_t result; ReadUnsignedLEB128ErrorCode error_code = ReadUnsignedLEB128Operand(leb_value, leb_value + 5, &length, &result); CHECK_EQ(error_code, expected_error_code); if (error_code == 0) { CHECK_EQ(result, expected_result); CHECK_EQ(length, expected_length); } } void CheckWriteValue(uint32_t input, int length, uint8_t* vals) { const std::vector<uint8_t> result = UnsignedLEB128From(input); CHECK_EQ(result.size(), length); for (int i = 0; i < length; i++) { CHECK_EQ(result.at(i), vals[i]); } } }; TEST_F(EncoderTest, Function_Builder_Variable_Indexing) { Zone zone; WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone); uint16_t f_index = builder->AddFunction(); WasmFunctionBuilder* function = builder->FunctionAt(f_index); uint16_t local_float32 = function->AddLocal(kAstF32); uint16_t param_float32 = function->AddParam(kAstF32); uint16_t local_int32 = function->AddLocal(kAstI32); uint16_t local_float64 = function->AddLocal(kAstF64); uint16_t local_int64 = function->AddLocal(kAstI64); uint16_t param_int32 = function->AddParam(kAstI32); uint16_t local_int32_2 = function->AddLocal(kAstI32); byte code[] = {kExprGetLocal, static_cast<uint8_t>(param_float32)}; uint32_t local_indices[] = {1}; function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(param_int32); function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(local_int32); function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(local_int32_2); function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(local_int64); function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(local_float32); function->EmitCode(code, sizeof(code), local_indices, 1); code[1] = static_cast<uint8_t>(local_float64); function->EmitCode(code, sizeof(code), local_indices, 1); WasmFunctionEncoder* f = function->Build(&zone, builder); ZoneVector<uint8_t> buffer_vector(f->HeaderSize() + f->BodySize(), &zone); byte* buffer = &buffer_vector[0]; byte* header = buffer; byte* body = buffer + f->HeaderSize(); f->Serialize(buffer, &header, &body); for (size_t i = 0; i < 7; i++) { CHECK_EQ(i, static_cast<size_t>(*(buffer + 2 * i + f->HeaderSize() + 1))); } } TEST_F(EncoderTest, Function_Builder_Indexing_Variable_Width) { Zone zone; WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone); uint16_t f_index = builder->AddFunction(); WasmFunctionBuilder* function = builder->FunctionAt(f_index); for (size_t i = 0; i < 128; i++) { AddLocal(function, kAstF32); } AddLocal(function, kAstI32); WasmFunctionEncoder* f = function->Build(&zone, builder); ZoneVector<uint8_t> buffer_vector(f->HeaderSize() + f->BodySize(), &zone); byte* buffer = &buffer_vector[0]; byte* header = buffer; byte* body = buffer + f->HeaderSize(); f->Serialize(buffer, &header, &body); body = buffer + f->HeaderSize(); for (size_t i = 0; i < 127; i++) { CHECK_EQ(kExprGetLocal, static_cast<size_t>(*(body + 2 * i))); CHECK_EQ(i + 1, static_cast<size_t>(*(body + 2 * i + 1))); } CHECK_EQ(kExprGetLocal, static_cast<size_t>(*(body + 2 * 127))); CHECK_EQ(0x80, static_cast<size_t>(*(body + 2 * 127 + 1))); CHECK_EQ(0x01, static_cast<size_t>(*(body + 2 * 127 + 2))); CHECK_EQ(kExprGetLocal, static_cast<size_t>(*(body + 2 * 127 + 3))); CHECK_EQ(0x00, static_cast<size_t>(*(body + 2 * 127 + 4))); } TEST_F(EncoderTest, LEB_Functions) { byte leb_value[5] = {0, 0, 0, 0, 0}; CheckReadValue(leb_value, 0, 1, kNoError); CheckWriteValue(0, 1, leb_value); leb_value[0] = 23; CheckReadValue(leb_value, 23, 1, kNoError); CheckWriteValue(23, 1, leb_value); leb_value[0] = 0x80; leb_value[1] = 0x01; CheckReadValue(leb_value, 128, 2, kNoError); CheckWriteValue(128, 2, leb_value); leb_value[0] = 0x80; leb_value[1] = 0x80; leb_value[2] = 0x80; leb_value[3] = 0x80; leb_value[4] = 0x01; CheckReadValue(leb_value, 0x10000000, 5, kNoError); CheckWriteValue(0x10000000, 5, leb_value); leb_value[0] = 0x80; leb_value[1] = 0x80; leb_value[2] = 0x80; leb_value[3] = 0x80; leb_value[4] = 0x80; CheckReadValue(leb_value, -1, -1, kInvalidLEB128); } } // namespace wasm } // namespace internal } // namespace v8