interpreterRT_zero.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26class SignatureHandler {
27 public:
28  static SignatureHandler *from_handlerAddr(address handlerAddr) {
29    return (SignatureHandler *) handlerAddr;
30  }
31
32 public:
33  ffi_cif* cif() const {
34    return (ffi_cif *) this;
35  }
36
37  int argument_count() const {
38    return cif()->nargs;
39  }
40
41  ffi_type** argument_types() const {
42    return (ffi_type**) (cif() + 1);
43  }
44
45  ffi_type* argument_type(int i) const {
46    return argument_types()[i];
47  }
48
49  ffi_type* result_type() const {
50    return *(argument_types() + argument_count());
51  }
52
53 protected:
54  friend class InterpreterRuntime;
55  friend class SignatureHandlerLibrary;
56
57  void finalize();
58};
59
60class SignatureHandlerGeneratorBase : public NativeSignatureIterator {
61 private:
62  ffi_cif* _cif;
63
64 protected:
65  SignatureHandlerGeneratorBase(methodHandle method, ffi_cif *cif)
66    : NativeSignatureIterator(method), _cif(cif) {
67    _cif->nargs = 0;
68  }
69
70  ffi_cif *cif() const {
71    return _cif;
72  }
73
74 public:
75  void generate(uint64_t fingerprint);
76
77 private:
78  void pass_int();
79  void pass_long();
80  void pass_float();
81  void pass_double();
82  void pass_object();
83
84 private:
85  void push(BasicType type);
86  virtual void push(intptr_t value) = 0;
87};
88
89class SignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
90 private:
91  CodeBuffer* _cb;
92
93 public:
94  SignatureHandlerGenerator(methodHandle method, CodeBuffer* buffer)
95    : SignatureHandlerGeneratorBase(method, (ffi_cif *) buffer->code_end()),
96      _cb(buffer) {
97    _cb->set_code_end((address) (cif() + 1));
98  }
99
100 private:
101  void push(intptr_t value) {
102    intptr_t *dst = (intptr_t *) _cb->code_end();
103    _cb->set_code_end((address) (dst + 1));
104    *dst = value;
105  }
106};
107
108class SlowSignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
109 private:
110  intptr_t *_dst;
111
112 public:
113  SlowSignatureHandlerGenerator(methodHandle method, intptr_t* buf)
114    : SignatureHandlerGeneratorBase(method, (ffi_cif *) buf) {
115    _dst = (intptr_t *) (cif() + 1);
116  }
117
118 private:
119  void push(intptr_t value) {
120    *(_dst++) = value;
121  }
122
123 public:
124  SignatureHandler *handler() const {
125    return (SignatureHandler *) cif();
126  }
127};
128