ciInstance.hpp revision 1879:f95d63e2154a 
1/*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
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24
25#ifndef SHARE_VM_CI_CIINSTANCE_HPP
26#define SHARE_VM_CI_CIINSTANCE_HPP
27
28#include "ci/ciObject.hpp"
29#include "oops/instanceOop.hpp"
30
31// ciInstance
32//
33// This class represents an instanceOop in the HotSpot virtual
34// machine.  This is an oop which corresponds to a non-array
35// instance of java.lang.Object.
36class ciInstance : public ciObject {
37  CI_PACKAGE_ACCESS
38
39protected:
40  ciInstance(instanceHandle h_i) : ciObject(h_i) {
41    assert(h_i()->is_instance(), "wrong type");
42  }
43
44  ciInstance(ciKlass* klass) : ciObject(klass) {}
45
46  instanceOop get_instanceOop() { return (instanceOop)get_oop(); }
47
48  const char* type_string() { return "ciInstance"; }
49
50  void print_impl(outputStream* st);
51
52public:
53  // If this object is a java mirror, return the corresponding type.
54  // Otherwise, return NULL.
55  // (Remember that a java mirror is an instance of java.lang.Class.)
56  ciType* java_mirror_type();
57
58  // What kind of ciObject is this?
59  bool is_instance()     { return true; }
60  bool is_java_object()  { return true; }
61
62  // Constant value of a field.
63  ciConstant field_value(ciField* field);
64
65  // Constant value of a field at the specified offset.
66  ciConstant field_value_by_offset(int field_offset);
67};
68
69#endif // SHARE_VM_CI_CIINSTANCE_HPP
70