Quelle resolutionErrors.hpp Sprache: C

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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* version 2 for more details (a copy is included in the LICENSE file that
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#ifndef SHARE_CLASSFILE_RESOLUTIONERRORS_HPP
#define SHARE_CLASSFILE_RESOLUTIONERRORS_HPP

#include "oops/constantPool.hpp"

class ResolutionErrorEntry;

// ResolutionError objects are used to record errors encountered during
// constant pool resolution (JVMS 5.4.3).

class ResolutionErrorTable : AllStatic {

public:
  static void add_entry(const constantPoolHandle& pool, int which, Symbol* error, Symbol* message,
                        Symbol* cause, Symbol* cause_msg);

  static void add_entry(const constantPoolHandle& pool, int which, const char* message);

  // find error given the constant pool and constant pool index
  static ResolutionErrorEntry* find_entry(const constantPoolHandle& pool, int cp_index);

  // purges unloaded entries from the table
  static void purge_resolution_errors();

  // RedefineClasses support - remove obsolete constant pool entry
  static void delete_entry(ConstantPool* c);

  // This value is added to the cpCache index of an invokedynamic instruction when
  // storing the resolution error resulting from that invokedynamic instruction.
  // This prevents issues where the cpCache index is the same as the constant pool
  // index of another entry in the table.
  static const int CPCACHE_INDEX_MANGLE_VALUE = 1000000;

  // This function is used to encode an index to differentiate it from a
  // constant pool index.  It assumes it is being called with a cpCache index
  // (that is less than 0).
  static int encode_cpcache_index(int index) {
    assert(index < 0, "Unexpected non-negative cpCache index");
    return index + CPCACHE_INDEX_MANGLE_VALUE;
  }
};

class ResolutionErrorEntry : public CHeapObj<mtClass> {
private:
  Symbol*           _error;
  Symbol*           _message;
  Symbol*           _cause;
  Symbol*           _cause_msg;
  const char*       _nest_host_error;

  NONCOPYABLE(ResolutionErrorEntry);

public:
    ResolutionErrorEntry(Symbol* error, Symbol* message, Symbol* cause, Symbol* cause_msg);

    ResolutionErrorEntry(const char* message):
        _error(nullptr),
        _message(nullptr),
        _cause(nullptr),
        _cause_msg(nullptr),
        _nest_host_error(message) {}

    ~ResolutionErrorEntry();

    void set_nest_host_error(const char* message) {
      _nest_host_error = message;
    }

  Symbol*            error() const              { return _error; }
  Symbol*            message() const            { return _message; }
  Symbol*            cause() const              { return _cause; }
  Symbol*            cause_msg() const          { return _cause_msg; }
  const char*        nest_host_error() const    { return _nest_host_error; }
};

#endif // SHARE_CLASSFILE_RESOLUTIONERRORS_HPP

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