Tue, 15 Mar 2011 06:35:10 -0700
7024234: 2/3 jvmti tests fail assert(!_oops_are_stale) failed: oops are stale on Win-AMD64
Summary: Move initialization of the '_instance' field to avoid race with ServiceThread start.
Reviewed-by: dholmes, kamg, never, dsamersoff, ysr, coleenp, acorn
1 /*
2 * Copyright (c) 1997, 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.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_RUNTIME_JAVACALLS_HPP
26 #define SHARE_VM_RUNTIME_JAVACALLS_HPP
28 #include "memory/allocation.hpp"
29 #include "oops/methodOop.hpp"
30 #include "runtime/handles.hpp"
31 #include "runtime/javaFrameAnchor.hpp"
32 #include "runtime/vmThread.hpp"
33 #ifdef TARGET_ARCH_x86
34 # include "jniTypes_x86.hpp"
35 #endif
36 #ifdef TARGET_ARCH_sparc
37 # include "jniTypes_sparc.hpp"
38 #endif
39 #ifdef TARGET_ARCH_zero
40 # include "jniTypes_zero.hpp"
41 #endif
42 #ifdef TARGET_ARCH_arm
43 # include "jniTypes_arm.hpp"
44 #endif
45 #ifdef TARGET_ARCH_ppc
46 # include "jniTypes_ppc.hpp"
47 #endif
48 #ifdef TARGET_OS_FAMILY_linux
49 # include "thread_linux.inline.hpp"
50 #endif
51 #ifdef TARGET_OS_FAMILY_solaris
52 # include "thread_solaris.inline.hpp"
53 #endif
54 #ifdef TARGET_OS_FAMILY_windows
55 # include "thread_windows.inline.hpp"
56 #endif
58 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
59 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last
60 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
62 class JavaCallWrapper: StackObj {
63 friend class VMStructs;
64 private:
65 JavaThread* _thread; // the thread to which this call belongs
66 JNIHandleBlock* _handles; // the saved handle block
67 methodOop _callee_method; // to be able to collect arguments if entry frame is top frame
68 oop _receiver; // the receiver of the call (if a non-static call)
70 JavaFrameAnchor _anchor; // last thread anchor state that we must restore
72 JavaValue* _result; // result value
74 public:
75 // Construction/destruction
76 JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
77 ~JavaCallWrapper();
79 // Accessors
80 JavaThread* thread() const { return _thread; }
81 JNIHandleBlock* handles() const { return _handles; }
83 JavaFrameAnchor* anchor(void) { return &_anchor; }
85 JavaValue* result() const { return _result; }
86 // GC support
87 methodOop callee_method() { return _callee_method; }
88 oop receiver() { return _receiver; }
89 void oops_do(OopClosure* f);
91 };
94 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
95 class JavaCallArguments : public StackObj {
96 private:
97 enum Constants {
98 _default_size = 8 // Must be at least # of arguments in JavaCalls methods
99 };
101 intptr_t _value_buffer [_default_size + 1];
102 bool _is_oop_buffer[_default_size + 1];
104 intptr_t* _value;
105 bool* _is_oop;
106 int _size;
107 int _max_size;
108 bool _start_at_zero; // Support late setting of receiver
110 void initialize() {
111 // Starts at first element to support set_receiver.
112 _value = &_value_buffer[1];
113 _is_oop = &_is_oop_buffer[1];
115 _max_size = _default_size;
116 _size = 0;
117 _start_at_zero = false;
118 }
120 public:
121 JavaCallArguments() { initialize(); }
123 JavaCallArguments(Handle receiver) {
124 initialize();
125 push_oop(receiver);
126 }
128 JavaCallArguments(int max_size) {
129 if (max_size > _default_size) {
130 _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
131 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
133 // Reserve room for potential receiver in value and is_oop
134 _value++; _is_oop++;
136 _max_size = max_size;
137 _size = 0;
138 _start_at_zero = false;
139 } else {
140 initialize();
141 }
142 }
144 inline void push_oop(Handle h) { _is_oop[_size] = true;
145 JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
147 inline void push_int(int i) { _is_oop[_size] = false;
148 JNITypes::put_int(i, _value, _size); }
150 inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
151 JNITypes::put_double(d, _value, _size); }
153 inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
154 JNITypes::put_long(l, _value, _size); }
156 inline void push_float(float f) { _is_oop[_size] = false;
157 JNITypes::put_float(f, _value, _size); }
159 // receiver
160 Handle receiver() {
161 assert(_size > 0, "must at least be one argument");
162 assert(_is_oop[0], "first argument must be an oop");
163 assert(_value[0] != 0, "receiver must be not-null");
164 return Handle((oop*)_value[0], false);
165 }
167 void set_receiver(Handle h) {
168 assert(_start_at_zero == false, "can only be called once");
169 _start_at_zero = true;
170 _is_oop--;
171 _value--;
172 _size++;
173 _is_oop[0] = true;
174 _value[0] = (intptr_t)h.raw_value();
175 }
177 // Converts all Handles to oops, and returns a reference to parameter vector
178 intptr_t* parameters() ;
179 int size_of_parameters() const { return _size; }
181 // Verify that pushed arguments fits a given method
182 void verify(methodHandle method, BasicType return_type, Thread *thread);
183 };
185 // All calls to Java have to go via JavaCalls. Sets up the stack frame
186 // and makes sure that the last_Java_frame pointers are chained correctly.
187 //
189 class JavaCalls: AllStatic {
190 static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
191 public:
192 // Optimized Constuctor call
193 static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
195 // call_special
196 // ------------
197 // The receiver must be first oop in argument list
198 static void call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
200 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); // No args
201 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
202 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
204 // virtual call
205 // ------------
207 // The receiver must be first oop in argument list
208 static void call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
210 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS); // No args
211 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
212 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
214 // Static call
215 // -----------
216 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
218 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
219 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
220 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
222 // Low-level interface
223 static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
224 };
226 #endif // SHARE_VM_RUNTIME_JAVACALLS_HPP