src/hotspot/share/cds/finalImageRecipes.hpp

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#ifndef SHARE_CDS_FINALIMAGERECIPES_HPP
#define SHARE_CDS_FINALIMAGERECIPES_HPP

#include "oops/oopsHierarchy.hpp"
#include "utilities/exceptions.hpp"

class InstanceKlass;
class Klass;

template <typename T> class GrowableArray;
template <typename T> class Array;

// This class is used for transferring information from the AOTConfiguration file (aka the "preimage")
// to the JVM that creates the AOTCache (aka the "final image").
//   - The recipes are recorded when CDSConfig::is_dumping_preimage_static_archive() is true.
//   - The recipes are applied when CDSConfig::is_dumping_final_static_archive() is true.
// The following information are recorded:
//   - The list of all classes that are stored in the AOTConfiguration file.
//   - The list of all classes that require AOT resolution of invokedynamic call sites.
class FinalImageRecipes {
  static constexpr int HAS_CLASS            = 0x1;
  static constexpr int HAS_FIELD_AND_METHOD = 0x2;
  static constexpr int HAS_INDY             = 0x4;

  // A list of all the archived classes from the preimage. We want to transfer all of these
  // into the final image.
  Array<Klass*>* _all_klasses;

  // For each klass k _all_klasses->at(i), _cp_recipes->at(i) lists all the {klass,field,method,indy}
  // cp indices that were resolved for k during the training run.
  Array<Array<int>*>* _cp_recipes;
  Array<int>* _cp_flags;

  FinalImageRecipes() : _all_klasses(nullptr), _cp_recipes(nullptr), _cp_flags(nullptr) {}

  void* operator new(size_t size) throw();

  // Called when dumping preimage
  void record_all_classes();
  void record_recipes_for_constantpool();

  // Called when dumping final image
  void apply_recipes_impl(TRAPS);
  void load_all_classes(TRAPS);
  void apply_recipes_for_constantpool(JavaThread* current);

public:
  static void serialize(SerializeClosure* soc);

  // Called when dumping preimage
  static void record_recipes();

  // Called when dumping final image
  static void apply_recipes(TRAPS);
};

#endif // SHARE_CDS_FINALIMAGERECIPES_HPP