/*
 * 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_DRIVER_COMPILER_OPTIONS_H_
#define ART_COMPILER_DRIVER_COMPILER_OPTIONS_H_

#include <ostream>
#include <string>
#include <vector>

#include "base/macros.h"
#include "globals.h"

namespace art {

class CompilerOptions FINAL {
 public:
  enum CompilerFilter {
    kVerifyNone,          // Skip verification and compile nothing except JNI stubs.
    kInterpretOnly,       // Compile nothing except JNI stubs.
    kSpace,               // Maximize space savings.
    kBalanced,            // Try to get the best performance return on compilation investment.
    kSpeed,               // Maximize runtime performance.
    kEverything,          // Force compilation (Note: excludes compilation of class initializers).
    kTime,                // Compile methods, but minimize compilation time.
  };

  // Guide heuristics to determine whether to compile method if profile data not available.
#if ART_SMALL_MODE
  static const CompilerFilter kDefaultCompilerFilter = kInterpretOnly;
#else
  static const CompilerFilter kDefaultCompilerFilter = kSpeed;
#endif
  static const size_t kDefaultHugeMethodThreshold = 10000;
  static const size_t kDefaultLargeMethodThreshold = 600;
  static const size_t kDefaultSmallMethodThreshold = 60;
  static const size_t kDefaultTinyMethodThreshold = 20;
  static const size_t kDefaultNumDexMethodsThreshold = 900;
  static constexpr double kDefaultTopKProfileThreshold = 90.0;
  static const bool kDefaultIncludeDebugSymbols = kIsDebugBuild;
  static const bool kDefaultIncludePatchInformation = false;

  CompilerOptions() :
    compiler_filter_(kDefaultCompilerFilter),
    huge_method_threshold_(kDefaultHugeMethodThreshold),
    large_method_threshold_(kDefaultLargeMethodThreshold),
    small_method_threshold_(kDefaultSmallMethodThreshold),
    tiny_method_threshold_(kDefaultTinyMethodThreshold),
    num_dex_methods_threshold_(kDefaultNumDexMethodsThreshold),
    generate_gdb_information_(false),
    include_patch_information_(kDefaultIncludePatchInformation),
    top_k_profile_threshold_(kDefaultTopKProfileThreshold),
    include_debug_symbols_(kDefaultIncludeDebugSymbols),
    implicit_null_checks_(true),
    implicit_so_checks_(true),
    implicit_suspend_checks_(false),
    compile_pic_(false),
    verbose_methods_(nullptr),
    init_failure_output_(nullptr) {
  }

  CompilerOptions(CompilerFilter compiler_filter,
                  size_t huge_method_threshold,
                  size_t large_method_threshold,
                  size_t small_method_threshold,
                  size_t tiny_method_threshold,
                  size_t num_dex_methods_threshold,
                  bool generate_gdb_information,
                  bool include_patch_information,
                  double top_k_profile_threshold,
                  bool include_debug_symbols,
                  bool implicit_null_checks,
                  bool implicit_so_checks,
                  bool implicit_suspend_checks,
                  bool compile_pic,
                  const std::vector<std::string>* verbose_methods,
                  std::ostream* init_failure_output
                  ) :  // NOLINT(whitespace/parens)
    compiler_filter_(compiler_filter),
    huge_method_threshold_(huge_method_threshold),
    large_method_threshold_(large_method_threshold),
    small_method_threshold_(small_method_threshold),
    tiny_method_threshold_(tiny_method_threshold),
    num_dex_methods_threshold_(num_dex_methods_threshold),
    generate_gdb_information_(generate_gdb_information),
    include_patch_information_(include_patch_information),
    top_k_profile_threshold_(top_k_profile_threshold),
    include_debug_symbols_(include_debug_symbols),
    implicit_null_checks_(implicit_null_checks),
    implicit_so_checks_(implicit_so_checks),
    implicit_suspend_checks_(implicit_suspend_checks),
    compile_pic_(compile_pic),
    verbose_methods_(verbose_methods),
    init_failure_output_(init_failure_output) {
  }

  CompilerFilter GetCompilerFilter() const {
    return compiler_filter_;
  }

  void SetCompilerFilter(CompilerFilter compiler_filter) {
    compiler_filter_ = compiler_filter;
  }

  bool IsCompilationEnabled() const {
    return ((compiler_filter_ != CompilerOptions::kVerifyNone) &&
            (compiler_filter_ != CompilerOptions::kInterpretOnly));
  }

  bool IsVerificationEnabled() const {
    return (compiler_filter_ != CompilerOptions::kVerifyNone);
  }

  size_t GetHugeMethodThreshold() const {
    return huge_method_threshold_;
  }

  size_t GetLargeMethodThreshold() const {
    return large_method_threshold_;
  }

  size_t GetSmallMethodThreshold() const {
    return small_method_threshold_;
  }

  size_t GetTinyMethodThreshold() const {
    return tiny_method_threshold_;
  }

  bool IsHugeMethod(size_t num_dalvik_instructions) const {
    return num_dalvik_instructions > huge_method_threshold_;
  }

  bool IsLargeMethod(size_t num_dalvik_instructions) const {
    return num_dalvik_instructions > large_method_threshold_;
  }

  bool IsSmallMethod(size_t num_dalvik_instructions) const {
    return num_dalvik_instructions > small_method_threshold_;
  }

  bool IsTinyMethod(size_t num_dalvik_instructions) const {
    return num_dalvik_instructions > tiny_method_threshold_;
  }

  size_t GetNumDexMethodsThreshold() const {
    return num_dex_methods_threshold_;
  }

  double GetTopKProfileThreshold() const {
    return top_k_profile_threshold_;
  }

  bool GetIncludeDebugSymbols() const {
    return include_debug_symbols_;
  }

  bool GetImplicitNullChecks() const {
    return implicit_null_checks_;
  }

  bool GetImplicitStackOverflowChecks() const {
    return implicit_so_checks_;
  }

  bool GetImplicitSuspendChecks() const {
    return implicit_suspend_checks_;
  }

  bool GetGenerateGDBInformation() const {
    return generate_gdb_information_;
  }

  bool GetIncludePatchInformation() const {
    return include_patch_information_;
  }

  // Should the code be compiled as position independent?
  bool GetCompilePic() const {
    return compile_pic_;
  }

  bool HasVerboseMethods() const {
    return verbose_methods_ != nullptr && !verbose_methods_->empty();
  }

  bool IsVerboseMethod(const std::string& pretty_method) const {
    for (const std::string& cur_method : *verbose_methods_) {
      if (pretty_method.find(cur_method) != std::string::npos) {
        return true;
      }
    }
    return false;
  }

  std::ostream* GetInitFailureOutput() const {
    return init_failure_output_;
  }

 private:
  CompilerFilter compiler_filter_;
  const size_t huge_method_threshold_;
  const size_t large_method_threshold_;
  const size_t small_method_threshold_;
  const size_t tiny_method_threshold_;
  const size_t num_dex_methods_threshold_;
  const bool generate_gdb_information_;
  const bool include_patch_information_;
  // When using a profile file only the top K% of the profiled samples will be compiled.
  const double top_k_profile_threshold_;
  const bool include_debug_symbols_;
  const bool implicit_null_checks_;
  const bool implicit_so_checks_;
  const bool implicit_suspend_checks_;
  const bool compile_pic_;

  // Vector of methods to have verbose output enabled for.
  const std::vector<std::string>* const verbose_methods_;

  // Log initialization of initialization failures to this stream if not null.
  std::ostream* const init_failure_output_;

  DISALLOW_COPY_AND_ASSIGN(CompilerOptions);
};
std::ostream& operator<<(std::ostream& os, const CompilerOptions::CompilerFilter& rhs);

}  // namespace art

#endif  // ART_COMPILER_DRIVER_COMPILER_OPTIONS_H_