/*
 * Copyright (C) 2014 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.
 */

#ifndef ART_COMPILER_UTILS_JNI_MACRO_ASSEMBLER_TEST_H_
#define ART_COMPILER_UTILS_JNI_MACRO_ASSEMBLER_TEST_H_

#include "jni_macro_assembler.h"

#include "assembler_test_base.h"
#include "base/malloc_arena_pool.h"
#include "common_runtime_test.h"  // For ScratchFile

#include <sys/stat.h>

#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iterator>

namespace art {

template<typename Ass>
class JNIMacroAssemblerTest : public testing::Test {
 public:
  Ass* GetAssembler() {
    return assembler_.get();
  }

  typedef std::string (*TestFn)(JNIMacroAssemblerTest* assembler_test, Ass* assembler);

  void DriverFn(TestFn f, const std::string& test_name) {
    DriverWrapper(f(this, assembler_.get()), test_name);
  }

  // This driver assumes the assembler has already been called.
  void DriverStr(const std::string& assembly_string, const std::string& test_name) {
    DriverWrapper(assembly_string, test_name);
  }

  // This is intended to be run as a test.
  bool CheckTools() {
    return test_helper_->CheckTools();
  }

 protected:
  JNIMacroAssemblerTest() {}

  void SetUp() override {
    allocator_.reset(new ArenaAllocator(&pool_));
    assembler_.reset(CreateAssembler(allocator_.get()));
    test_helper_.reset(
        new AssemblerTestInfrastructure(GetArchitectureString(),
                                        GetAssemblerCmdName(),
                                        GetAssemblerParameters(),
                                        GetObjdumpCmdName(),
                                        GetObjdumpParameters(),
                                        GetDisassembleCmdName(),
                                        GetDisassembleParameters(),
                                        GetAssemblyHeader()));

    SetUpHelpers();
  }

  void TearDown() override {
    test_helper_.reset();  // Clean up the helper.
    assembler_.reset();
    allocator_.reset();
  }

  // Override this to set up any architecture-specific things, e.g., CPU revision.
  virtual Ass* CreateAssembler(ArenaAllocator* allocator) {
    return new (allocator) Ass(allocator);
  }

  // Override this to set up any architecture-specific things, e.g., register vectors.
  virtual void SetUpHelpers() {}

  // Get the typically used name for this architecture, e.g., aarch64, x86_64, ...
  virtual std::string GetArchitectureString() = 0;

  // Get the name of the assembler, e.g., "as" by default.
  virtual std::string GetAssemblerCmdName() {
    return "as";
  }

  // Switches to the assembler command. Default none.
  virtual std::string GetAssemblerParameters() {
    return "";
  }

  // Get the name of the objdump, e.g., "objdump" by default.
  virtual std::string GetObjdumpCmdName() {
    return "objdump";
  }

  // Switches to the objdump command. Default is " -h".
  virtual std::string GetObjdumpParameters() {
    return " -h";
  }

  // Get the name of the objdump, e.g., "objdump" by default.
  virtual std::string GetDisassembleCmdName() {
    return "objdump";
  }

  // Switches to the objdump command. As it's a binary, one needs to push the architecture and
  // such to objdump, so it's architecture-specific and there is no default.
  virtual std::string GetDisassembleParameters() = 0;

  // If the assembly file needs a header, return it in a sub-class.
  virtual const char* GetAssemblyHeader() {
    return nullptr;
  }

 private:
  // Override this to pad the code with NOPs to a certain size if needed.
  virtual void Pad(std::vector<uint8_t>& data ATTRIBUTE_UNUSED) {
  }

  void DriverWrapper(const std::string& assembly_text, const std::string& test_name) {
    assembler_->FinalizeCode();
    size_t cs = assembler_->CodeSize();
    std::unique_ptr<std::vector<uint8_t>> data(new std::vector<uint8_t>(cs));
    MemoryRegion code(&(*data)[0], data->size());
    assembler_->FinalizeInstructions(code);
    Pad(*data);
    test_helper_->Driver(*data, assembly_text, test_name);
  }

  MallocArenaPool pool_;
  std::unique_ptr<ArenaAllocator> allocator_;
  std::unique_ptr<Ass> assembler_;
  std::unique_ptr<AssemblerTestInfrastructure> test_helper_;

  DISALLOW_COPY_AND_ASSIGN(JNIMacroAssemblerTest);
};

}  // namespace art

#endif  // ART_COMPILER_UTILS_JNI_MACRO_ASSEMBLER_TEST_H_