1 /*
2  * Copyright (c) 1998, 2013, 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
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 #include "util.h"
27 #include "ThreadGroupReferenceImpl.h"
28 #include "inStream.h"
29 #include "outStream.h"
30 
31 static jboolean
32 name(PacketInputStream *in, PacketOutputStream *out)
33 {
34     JNIEnv *env;
35     jthreadGroup group;
36 
37     env = getEnv();
38 
39     group = inStream_readThreadGroupRef(env, in);
40     if (inStream_error(in)) {
41         return JNI_TRUE;
42     }
43 
44     WITH_LOCAL_REFS(env, 1) {
45 
46         jvmtiThreadGroupInfo info;
47 
48         (void)memset(&info, 0, sizeof(info));
49         threadGroupInfo(group, &info);
50         (void)outStream_writeString(out, info.name == NULL ? "" : info.name);
51         if ( info.name != NULL )
52             jvmtiDeallocate(info.name);
53 
54     } END_WITH_LOCAL_REFS(env);
55 
56     return JNI_TRUE;
57 }
58 
59 static jboolean
60 parent(PacketInputStream *in, PacketOutputStream *out)
61 {
62     JNIEnv *env;
63     jthreadGroup group;
64 
65     env = getEnv();
66 
67     group = inStream_readThreadGroupRef(env, in);
68     if (inStream_error(in)) {
69         return JNI_TRUE;
70     }
71 
72     WITH_LOCAL_REFS(env, 1) {
73 
74         jvmtiThreadGroupInfo info;
75 
76         (void)memset(&info, 0, sizeof(info));
77         threadGroupInfo(group, &info);
78         (void)outStream_writeObjectRef(env, out, info.parent);
79         if ( info.name != NULL )
80             jvmtiDeallocate(info.name);
81 
82     } END_WITH_LOCAL_REFS(env);
83 
84     return JNI_TRUE;
85 }
86 
87 static jboolean
88 children(PacketInputStream *in, PacketOutputStream *out)
89 {
90      JNIEnv *env;
91      jthreadGroup group;
92 
93      env = getEnv();
94 
95      group = inStream_readThreadGroupRef(env, in);
96      if (inStream_error(in)) {
97          return JNI_TRUE;
98      }
99 
100      WITH_LOCAL_REFS(env, 1) {
101 
102          jvmtiError error;
103          jint threadCount;
104          jint groupCount;
105          jthread *theThreads;
106          jthread *theGroups;
107 
108          error = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadGroupChildren)(gdata->jvmti, group,
109                                               &threadCount,&theThreads,
110                                               &groupCount, &theGroups);
111          if (error != JVMTI_ERROR_NONE) {
112              outStream_setError(out, map2jdwpError(error));
113          } else {
114 
115              int i;
116 
117              /* Squish out all of the debugger-spawned threads */
118              threadCount = filterDebugThreads(theThreads, threadCount);
119 
120              (void)outStream_writeInt(out, threadCount);
121              for (i = 0; i < threadCount; i++) {
122                  (void)outStream_writeObjectRef(env, out, theThreads[i]);
123              }
124              (void)outStream_writeInt(out, groupCount);
125              for (i = 0; i < groupCount; i++) {
126                  (void)outStream_writeObjectRef(env, out, theGroups[i]);
127              }
128 
129              jvmtiDeallocate(theGroups);
130              jvmtiDeallocate(theThreads);
131          }
132 
133      } END_WITH_LOCAL_REFS(env);
134 
135      return JNI_TRUE;
136 }
137 
138 void *ThreadGroupReference_Cmds[] = { (void *)3,
139                                       (void *)name,
140                                       (void *)parent,
141                                       (void *)children };
142