forked from openjdk/jdk
-
Notifications
You must be signed in to change notification settings - Fork 0
/
InvokableTypeImpl.java
302 lines (281 loc) · 11.9 KB
/
InvokableTypeImpl.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
/*
* Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.tools.jdi;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.sun.jdi.ClassNotLoadedException;
import com.sun.jdi.ClassType;
import com.sun.jdi.IncompatibleThreadStateException;
import com.sun.jdi.InterfaceType;
import com.sun.jdi.InvalidTypeException;
import com.sun.jdi.InvocationException;
import com.sun.jdi.Method;
import com.sun.jdi.ReferenceType;
import com.sun.jdi.ThreadReference;
import com.sun.jdi.VMCannotBeModifiedException;
import com.sun.jdi.Value;
import com.sun.jdi.VirtualMachine;
/**
* A supertype for ReferenceTypes allowing method invocations
*/
abstract class InvokableTypeImpl extends ReferenceTypeImpl {
/**
* The invocation result wrapper
* It is necessary because both ClassType and InterfaceType
* use their own type to represent the invocation result
*/
static interface InvocationResult {
ObjectReferenceImpl getException();
ValueImpl getResult();
}
InvokableTypeImpl(VirtualMachine aVm, long aRef) {
super(aVm, aRef);
}
/**
* Method invocation support.
* Shared by ClassType and InterfaceType
* @param threadIntf the thread in which to invoke.
* @param methodIntf method the {@link Method} to invoke.
* @param origArguments the list of {@link Value} arguments bound to the
* invoked method. Values from the list are assigned to arguments
* in the order they appear in the method signature.
* @param options the integer bit flag options.
* @return a {@link Value} mirror of the invoked method's return value.
* @throws java.lang.IllegalArgumentException if the method is not
* a member of this type, if the size of the argument list
* does not match the number of declared arguments for the method, or
* if the method is not static or is a static initializer.
* @throws ClassNotLoadedException if any argument type has not yet been loaded
* through the appropriate class loader.
* @throws IncompatibleThreadStateException if the specified thread has not
* been suspended by an event.
* @throws InvocationException if the method invocation resulted in
* an exception in the target VM.
* @throws InvalidTypeException If the arguments do not meet this requirement --
* Object arguments must be assignment compatible with the argument
* type. This implies that the argument type must be
* loaded through the enclosing class's class loader.
* Primitive arguments must be either assignment compatible with the
* argument type or must be convertible to the argument type without loss
* of information. See JLS section 5.2 for more information on assignment
* compatibility.
* @throws VMCannotBeModifiedException if the VirtualMachine is read-only - see {@link VirtualMachine#canBeModified()}.
*/
final public Value invokeMethod(ThreadReference threadIntf, Method methodIntf,
List<? extends Value> origArguments, int options)
throws InvalidTypeException,
ClassNotLoadedException,
IncompatibleThreadStateException,
InvocationException {
validateMirror(threadIntf);
validateMirror(methodIntf);
validateMirrorsOrNulls(origArguments);
MethodImpl method = (MethodImpl) methodIntf;
ThreadReferenceImpl thread = (ThreadReferenceImpl) threadIntf;
validateMethodInvocation(method);
List<? extends Value> arguments = method.validateAndPrepareArgumentsForInvoke(origArguments);
ValueImpl[] args = arguments.toArray(new ValueImpl[0]);
InvocationResult ret;
try {
PacketStream stream = sendInvokeCommand(thread, method, args, options);
ret = waitForReply(stream);
} catch (JDWPException exc) {
if (exc.errorCode() == JDWP.Error.INVALID_THREAD) {
throw new IncompatibleThreadStateException();
} else {
throw exc.toJDIException();
}
}
/*
* There is an implict VM-wide suspend at the conclusion
* of a normal (non-single-threaded) method invoke
*/
if ((options & ClassType.INVOKE_SINGLE_THREADED) == 0) {
vm.notifySuspend();
}
if (ret.getException() != null) {
throw new InvocationException(ret.getException());
} else {
return ret.getResult();
}
}
@Override
boolean isAssignableTo(ReferenceType type) {
ClassTypeImpl superclazz = (ClassTypeImpl) superclass();
if (this.equals(type)) {
return true;
} else if ((superclazz != null) && superclazz.isAssignableTo(type)) {
return true;
} else {
List<InterfaceType> interfaces = interfaces();
for (InterfaceType interfaceType : interfaces) {
InterfaceTypeImpl interfaze = (InterfaceTypeImpl) interfaceType;
if (interfaze.isAssignableTo(type)) {
return true;
}
}
return false;
}
}
@Override
final void addVisibleMethods(Map<String, Method> methodMap, Set<InterfaceType> seenInterfaces) {
/*
* Add methods from
* parent types first, so that the methods in this class will
* overwrite them in the hash table
*/
for (InterfaceType interfaceType : interfaces()) {
InterfaceTypeImpl interfaze = (InterfaceTypeImpl) interfaceType;
if (!seenInterfaces.contains(interfaze)) {
interfaze.addVisibleMethods(methodMap, seenInterfaces);
seenInterfaces.add(interfaze);
}
}
ClassTypeImpl clazz = (ClassTypeImpl) superclass();
if (clazz != null) {
clazz.addVisibleMethods(methodMap, seenInterfaces);
}
addToMethodMap(methodMap, methods());
}
final void addInterfaces(List<InterfaceType> list) {
List<InterfaceType> immediate = interfaces();
list.addAll(interfaces());
for (InterfaceType interfaceType : immediate) {
InterfaceTypeImpl interfaze = (InterfaceTypeImpl) interfaceType;
interfaze.addInterfaces(list);
}
ClassTypeImpl superclass = (ClassTypeImpl) superclass();
if (superclass != null) {
superclass.addInterfaces(list);
}
}
/**
* Returns all the implemented interfaces recursively
* @return A list of all the implemented interfaces (recursively)
*/
final List<InterfaceType> getAllInterfaces() {
List<InterfaceType> all = new ArrayList<>();
addInterfaces(all);
return all;
}
/**
* Shared implementation of {@linkplain ClassType#allMethods()} and
* {@linkplain InterfaceType#allMethods()}
* @return A list of all methods (recursively)
*/
public final List<Method> allMethods() {
ArrayList<Method> list = new ArrayList<>(methods());
ClassType clazz = superclass();
while (clazz != null) {
list.addAll(clazz.methods());
clazz = clazz.superclass();
}
/*
* Avoid duplicate checking on each method by iterating through
* duplicate-free allInterfaces() rather than recursing
*/
for (InterfaceType interfaze : getAllInterfaces()) {
list.addAll(interfaze.methods());
}
return list;
}
@Override
final List<ReferenceType> inheritedTypes() {
List<ReferenceType> inherited = new ArrayList<>();
if (superclass() != null) {
inherited.add(0, superclass()); /* insert at front */
}
for (ReferenceType rt : interfaces()) {
inherited.add(rt);
}
return inherited;
}
private PacketStream sendInvokeCommand(final ThreadReferenceImpl thread,
final MethodImpl method,
final ValueImpl[] args,
final int options) {
CommandSender sender = getInvokeMethodSender(thread, method, args, options);
PacketStream stream;
if ((options & ClassType.INVOKE_SINGLE_THREADED) != 0) {
stream = thread.sendResumingCommand(sender);
} else {
stream = vm.sendResumingCommand(sender);
}
return stream;
}
private void validateMethodInvocation(Method method)
throws InvalidTypeException,
InvocationException {
if (!canInvoke(method)) {
throw new IllegalArgumentException("Invalid method");
}
/*
* Method must be a static and not a static initializer
*/
if (!method.isStatic()) {
throw new IllegalArgumentException("Cannot invoke instance method on a class/interface type");
} else if (method.isStaticInitializer()) {
throw new IllegalArgumentException("Cannot invoke static initializer");
}
}
/**
* A subclass will provide specific {@linkplain CommandSender}
* @param thread the current invocation thread
* @param method the method to invoke
* @param args the arguments to pass to the method
* @param options the integer bit flag options
* @return the specific {@literal CommandSender} instance
*/
abstract CommandSender getInvokeMethodSender(ThreadReferenceImpl thread,
MethodImpl method,
ValueImpl[] args,
int options);
/**
* Waits for the reply to the last sent command
* @param stream the stream to listen for the reply on
* @return the {@linkplain InvocationResult} instance
* @throws JDWPException when something goes wrong in JDWP
*/
abstract InvocationResult waitForReply(PacketStream stream) throws JDWPException;
/**
* Get the {@linkplain ReferenceType} superclass
* @return the superclass or null
*/
abstract ClassType superclass();
/**
* Get the implemented/extended interfaces
* @return the list of implemented/extended interfaces
*/
abstract List<InterfaceType> interfaces();
/**
* Checks the provided method whether it can be invoked
* @param method the method to check
* @return {@code TRUE} if the implementation knows how to invoke the method,
* {@code FALSE} otherwise
*/
abstract boolean canInvoke(Method method);
}