view src/share/vm/ci/ciObjectFactory.hpp @ 3832:bd7a7ce2e264

6830717: replay of compilations would help with debugging Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method. Reviewed-by: kvn, twisti, sspitsyn Contributed-by: yumin.qi@oracle.com
author minqi
date Mon, 12 Nov 2012 14:03:53 -0800
parents da91efe96a93
children f98f5d48f511
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/*
 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_CI_CIOBJECTFACTORY_HPP
#define SHARE_VM_CI_CIOBJECTFACTORY_HPP

#include "ci/ciClassList.hpp"
#include "ci/ciObject.hpp"
#include "utilities/growableArray.hpp"

// ciObjectFactory
//
// This class handles requests for the creation of new instances
// of ciObject and its subclasses.  It contains a caching mechanism
// which ensures that for each oop, at most one ciObject is created.
// This invariant allows efficient implementation of ciObject.
class ciObjectFactory : public ResourceObj {
  friend class VMStructs;
  friend class ciEnv;

private:
  static volatile bool _initialized;
  static GrowableArray<ciMetadata*>* _shared_ci_metadata;
  static ciSymbol*                 _shared_ci_symbols[];
  static int                       _shared_ident_limit;

  Arena*                    _arena;
  GrowableArray<ciMetadata*>*        _ci_metadata;
  GrowableArray<ciMethod*>* _unloaded_methods;
  GrowableArray<ciKlass*>* _unloaded_klasses;
  GrowableArray<ciInstance*>* _unloaded_instances;
  GrowableArray<ciReturnAddress*>* _return_addresses;
  GrowableArray<ciSymbol*>* _symbols;  // keep list of symbols created
  int                       _next_ident;

public:
  struct NonPermObject : public ResourceObj {
    ciObject*      _object;
    NonPermObject* _next;

    inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
    ciObject*     object()  { return _object; }
    NonPermObject* &next()  { return _next; }
  };
private:
  enum { NON_PERM_BUCKETS = 61 };
  NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
  int _non_perm_count;

  int find(Metadata* key, GrowableArray<ciMetadata*>* objects);
  bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects);
  void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects);

  ciObject* create_new_object(oop o);
  ciMetadata* create_new_object(Metadata* o);

  static bool is_equal(NonPermObject* p, oop key) {
    return p->object()->get_oop() == key;
  }

  NonPermObject* &find_non_perm(oop key);
  void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);

  void init_ident_of(ciBaseObject* obj);

  Arena* arena() { return _arena; }

  void print_contents_impl();

  ciInstance* get_unloaded_instance(ciInstanceKlass* klass);

public:
  static bool is_initialized() { return _initialized; }

  static void initialize();
  void init_shared_objects();
  void remove_symbols();

  ciObjectFactory(Arena* arena, int expected_size);

  // Get the ciObject corresponding to some oop.
  ciObject* get(oop key);
  ciMetadata* get_metadata(Metadata* key);
  ciSymbol* get_symbol(Symbol* key);

  // Get the ciSymbol corresponding to one of the vmSymbols.
  static ciSymbol* vm_symbol_at(int index);

  // Get the ciMethod representing an unloaded/unfound method.
  ciMethod* get_unloaded_method(ciInstanceKlass* holder,
                                ciSymbol*        name,
                                ciSymbol*        signature,
                                ciInstanceKlass* accessor);

  // Get a ciKlass representing an unloaded klass.
  ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
                              ciSymbol* name,
                              bool create_if_not_found);

  // Get a ciInstance representing an unresolved klass mirror.
  ciInstance* get_unloaded_klass_mirror(ciKlass* type);

  // Get a ciInstance representing an unresolved method handle constant.
  ciInstance* get_unloaded_method_handle_constant(ciKlass*  holder,
                                                  ciSymbol* name,
                                                  ciSymbol* signature,
                                                  int       ref_kind);

  // Get a ciInstance representing an unresolved method type constant.
  ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);


  // Get the ciMethodData representing the methodData for a method
  // with none.
  ciMethodData* get_empty_methodData();

  ciReturnAddress* get_return_address(int bci);

  GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; }
  // RedefineClasses support
  void metadata_do(void f(Metadata*));

  void print_contents();
  void print();
};

#endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP