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comparison src/share/vm/runtime/javaCalls.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
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
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
26 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last
27 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
28
29 class JavaCallWrapper: StackObj {
30 friend class VMStructs;
31 private:
32 JavaThread* _thread; // the thread to which this call belongs
33 JNIHandleBlock* _handles; // the saved handle block
34 methodOop _callee_method; // to be able to collect arguments if entry frame is top frame
35 oop _receiver; // the receiver of the call (if a non-static call)
36
37 JavaFrameAnchor _anchor; // last thread anchor state that we must restore
38
39 JavaValue* _result; // result value
40
41 public:
42 // Construction/destruction
43 JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
44 ~JavaCallWrapper();
45
46 // Accessors
47 JavaThread* thread() const { return _thread; }
48 JNIHandleBlock* handles() const { return _handles; }
49
50 JavaFrameAnchor* anchor(void) { return &_anchor; }
51
52 JavaValue* result() const { return _result; }
53 // GC support
54 methodOop callee_method() { return _callee_method; }
55 oop receiver() { return _receiver; }
56 void oops_do(OopClosure* f);
57
58 };
59
60
61 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
62 class JavaCallArguments : public StackObj {
63 private:
64 enum Constants {
65 _default_size = 8 // Must be at least # of arguments in JavaCalls methods
66 };
67
68 intptr_t _value_buffer [_default_size + 1];
69 intptr_t _parameter_buffer [_default_size*2 + 1];
70 bool _is_oop_buffer[_default_size + 1];
71
72 intptr_t* _value;
73 intptr_t* _parameters;
74 bool* _is_oop;
75 int _size;
76 int _max_size;
77 bool _start_at_zero; // Support late setting of receiver
78
79 void initialize() {
80 // Starts at first element to support set_receiver.
81 _value = &_value_buffer[1];
82 _is_oop = &_is_oop_buffer[1];
83
84 _parameters = &_parameter_buffer[0];
85 _max_size = _default_size;
86 _size = 0;
87 _start_at_zero = false;
88 }
89
90 public:
91 JavaCallArguments() { initialize(); }
92
93 JavaCallArguments(Handle receiver) {
94 initialize();
95 push_oop(receiver);
96 }
97
98 JavaCallArguments(int max_size) {
99 if (max_size > _default_size) {
100 _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
101 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
102 if (TaggedStackInterpreter) {
103 _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 1);
104 }
105 // Reserve room for potential receiver in value and is_oop
106 _value++; _is_oop++;
107 _max_size = max_size;
108 _size = 0;
109 _start_at_zero = false;
110 } else {
111 initialize();
112 }
113 }
114
115 inline void push_oop(Handle h) { _is_oop[_size] = true;
116 JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
117
118 inline void push_int(int i) { _is_oop[_size] = false;
119 JNITypes::put_int(i, _value, _size); }
120
121 inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
122 JNITypes::put_double(d, _value, _size); }
123
124 inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
125 JNITypes::put_long(l, _value, _size); }
126
127 inline void push_float(float f) { _is_oop[_size] = false;
128 JNITypes::put_float(f, _value, _size); }
129
130 // receiver
131 Handle receiver() {
132 assert(_size > 0, "must at least be one argument");
133 assert(_is_oop[0], "first argument must be an oop");
134 assert(_value[0] != 0, "receiver must be not-null");
135 return Handle((oop*)_value[0], false);
136 }
137
138 void set_receiver(Handle h) {
139 assert(_start_at_zero == false, "can only be called once");
140 _start_at_zero = true;
141 _is_oop--;
142 _value--;
143 _size++;
144 _is_oop[0] = true;
145 _value[0] = (intptr_t)h.raw_value();
146 }
147
148 // Converts all Handles to oops, and returns a reference to parameter vector
149 intptr_t* parameters() ;
150 int size_of_parameters() const { return _size; }
151
152 // Verify that pushed arguments fits a given method
153 void verify(methodHandle method, BasicType return_type, Thread *thread) PRODUCT_RETURN;
154 };
155
156 // All calls to Java have to go via JavaCalls. Sets up the stack frame
157 // and makes sure that the last_Java_frame pointers are chained correctly.
158 //
159
160 class JavaCalls: AllStatic {
161 static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
162 public:
163 // Optimized Constuctor call
164 static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
165
166 // call_special
167 // ------------
168 // The receiver must be first oop in argument list
169 static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
170
171 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
172 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
173 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
174
175 // virtual call
176 // ------------
177
178 // The receiver must be first oop in argument list
179 static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
180
181 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
182 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
183 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
184
185 // Static call
186 // -----------
187 static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
188
189 static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
190 static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
191 static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
192
193 // Low-level interface
194 static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
195 };