[view compiler] Remove dex_builder_test.cc

    name: "view-compiler-tests",

    defaults: ["viewcompiler_defaults"],

    srcs: [

        "dex_builder_test.cc",

        "layout_validation_test.cc",

        "util_test.cc",

    ],

/*

 * Copyright (C) 2018 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include "dex_builder.h"

#include "dex/art_dex_file_loader.h"

#include "dex/dex_file.h"

#include "gtest/gtest.h"

using namespace startop::dex;

// Takes a DexBuilder, encodes it into an in-memory DEX file, verifies the resulting DEX file and

// returns whether the verification was successful.

bool EncodeAndVerify(DexBuilder* dex_file) {

  slicer::MemView image{dex_file->CreateImage()};

  art::ArtDexFileLoader loader;

  std::string error_msg;

  std::unique_ptr<const art::DexFile> loaded_dex_file{loader.Open(image.ptr<const uint8_t>(),

                                                                  image.size(),

                                                                  /*location=*/"",

                                                                  /*location_checksum=*/0,

                                                                  /*oat_dex_file=*/nullptr,

                                                                  /*verify=*/true,

                                                                  /*verify_checksum=*/false,

                                                                  &error_msg)};

  return loaded_dex_file != nullptr;

}

// Write out and verify a DEX file that corresponds to:

//

// package dextest;

// public class DexTest {

//     public static void foo() {}

// }

TEST(DexBuilderTest, VerifyDexWithClassMethod) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  auto method{cbuilder.CreateMethod("foo", Prototype{TypeDescriptor::Void()})};

  method.BuildReturn();

  method.Encode();

  EXPECT_TRUE(EncodeAndVerify(&dex_file));

}

// Makes sure a bad DEX class fails to verify.

TEST(DexBuilderTest, VerifyBadDexWithClassMethod) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  // This method has the error, because methods cannot take Void() as a parameter.

  auto method{

      cbuilder.CreateMethod("foo", Prototype{TypeDescriptor::Void(), TypeDescriptor::Void()})};

  method.BuildReturn();

  method.Encode();

  EXPECT_FALSE(EncodeAndVerify(&dex_file));

}

// Write out and verify a DEX file that corresponds to:

//

// package dextest;

// public class DexTest {

//     public static int foo() { return 5; }

// }

TEST(DexBuilderTest, VerifyDexReturn5) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  auto method{cbuilder.CreateMethod("foo", Prototype{TypeDescriptor::Int()})};

  auto r = method.MakeRegister();

  method.BuildConst4(r, 5);

  method.BuildReturn(r);

  method.Encode();

  EXPECT_TRUE(EncodeAndVerify(&dex_file));

}

// Write out and verify a DEX file that corresponds to:

//

// package dextest;

// public class DexTest {

//     public static int foo(int x) { return x; }

// }

TEST(DexBuilderTest, VerifyDexReturnIntParam) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  auto method{

      cbuilder.CreateMethod("foo", Prototype{TypeDescriptor::Int(), TypeDescriptor::Int()})};

  method.BuildReturn(Value::Parameter(0));

  method.Encode();

  EXPECT_TRUE(EncodeAndVerify(&dex_file));

}

// Write out and verify a DEX file that corresponds to:

//

// package dextest;

// public class DexTest {

//     public static int foo(String s) { return s.length(); }

// }

TEST(DexBuilderTest, VerifyDexCallStringLength) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  MethodBuilder method{cbuilder.CreateMethod(

      "foo", Prototype{TypeDescriptor::Int(), TypeDescriptor::FromClassname("java.lang.String")})};

  Value result = method.MakeRegister();

  MethodDeclData string_length =

      dex_file.GetOrDeclareMethod(TypeDescriptor::FromClassname("java.lang.String"),

                                  "length",

                                  Prototype{TypeDescriptor::Int()});

  method.AddInstruction(Instruction::InvokeVirtual(string_length.id, result, Value::Parameter(0)));

  method.BuildReturn(result);

  method.Encode();

  EXPECT_TRUE(EncodeAndVerify(&dex_file));

}

// Write out and verify a DEX file that corresponds to:

//

// package dextest;

// public class DexTest {

//     public static int foo(String s) { return s.length(); }

// }

TEST(DexBuilderTest, VerifyDexCallManyRegisters) {

  DexBuilder dex_file;

  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};

  MethodBuilder method{cbuilder.CreateMethod(

      "foo", Prototype{TypeDescriptor::Int()})};

  Value result = method.MakeRegister();

  // Make a bunch of registers

  for (size_t i = 0; i < 25; ++i) {

    method.MakeRegister();

  }

  // Now load a string literal into a register

  Value string_val = method.MakeRegister();

  method.BuildConstString(string_val, "foo");

  MethodDeclData string_length =

      dex_file.GetOrDeclareMethod(TypeDescriptor::FromClassname("java.lang.String"),

                                  "length",

                                  Prototype{TypeDescriptor::Int()});

  method.AddInstruction(Instruction::InvokeVirtual(string_length.id, result, string_val));

  method.BuildReturn(result);

  method.Encode();

  EXPECT_TRUE(EncodeAndVerify(&dex_file));

}