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2  * Copyright (c) 2003, 2019, 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.
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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.
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25 
26 #ifndef CPU_ZERO_INTERPRETERRT_ZERO_HPP
27 #define CPU_ZERO_INTERPRETERRT_ZERO_HPP
28 
29 // This is included in the middle of class Interpreter.
30 // Do not include files here.
31 
32 
33 class SignatureHandler {
34  public:
from_handlerAddr(address handlerAddr)35   static SignatureHandler *from_handlerAddr(address handlerAddr) {
36     return (SignatureHandler *) handlerAddr;
37   }
38 
39  public:
cif() const40   ffi_cif* cif() const {
41     return (ffi_cif *) this;
42   }
43 
argument_count() const44   int argument_count() const {
45     return cif()->nargs;
46   }
47 
argument_types() const48   ffi_type** argument_types() const {
49     return (ffi_type**) (cif() + 1);
50   }
51 
argument_type(int i) const52   ffi_type* argument_type(int i) const {
53     return argument_types()[i];
54   }
55 
result_type() const56   ffi_type* result_type() const {
57     return *(argument_types() + argument_count());
58   }
59 
60  protected:
61   friend class InterpreterRuntime;
62   friend class SignatureHandlerLibrary;
63 
64   void finalize();
65 };
66 
67 class SignatureHandlerGeneratorBase : public NativeSignatureIterator {
68  private:
69   ffi_cif* _cif;
70 
71  protected:
SignatureHandlerGeneratorBase(const methodHandle & method,ffi_cif * cif)72   SignatureHandlerGeneratorBase(const methodHandle& method, ffi_cif *cif)
73     : NativeSignatureIterator(method), _cif(cif) {
74     _cif->nargs = 0;
75   }
76 
cif() const77   ffi_cif *cif() const {
78     return _cif;
79   }
80 
81  public:
82   void generate(uint64_t fingerprint);
83 
84  private:
85   void pass_int();
86   void pass_long();
87   void pass_float();
88   void pass_double();
89   void pass_object();
90 
91  private:
92   void push(BasicType type);
93   virtual void push(intptr_t value) = 0;
94 };
95 
96 class SignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
97  private:
98   CodeBuffer* _cb;
99 
100  public:
SignatureHandlerGenerator(const methodHandle & method,CodeBuffer * buffer)101   SignatureHandlerGenerator(const methodHandle& method, CodeBuffer* buffer)
102     : SignatureHandlerGeneratorBase(method, (ffi_cif *) buffer->insts_end()),
103       _cb(buffer) {
104     _cb->set_insts_end((address) (cif() + 1));
105   }
106 
107  private:
push(intptr_t value)108   void push(intptr_t value) {
109     intptr_t *dst = (intptr_t *) _cb->insts_end();
110     _cb->set_insts_end((address) (dst + 1));
111     *dst = value;
112   }
113 };
114 
115 class SlowSignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
116  private:
117   intptr_t *_dst;
118 
119  public:
SlowSignatureHandlerGenerator(const methodHandle & method,intptr_t * buf)120   SlowSignatureHandlerGenerator(const methodHandle& method, intptr_t* buf)
121     : SignatureHandlerGeneratorBase(method, (ffi_cif *) buf) {
122     _dst = (intptr_t *) (cif() + 1);
123   }
124 
125  private:
push(intptr_t value)126   void push(intptr_t value) {
127     *(_dst++) = value;
128   }
129 
130  public:
handler() const131   SignatureHandler *handler() const {
132     return (SignatureHandler *) cif();
133   }
134 };
135 
136 #endif // CPU_ZERO_INTERPRETERRT_ZERO_HPP
137