1 /*
  2  * Copyright (c) 1998, 2021, 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.  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 "threadControl.h"
 29 #include "inStream.h"
 30 #include "outStream.h"
 31 
 32 static jboolean
 33 name(PacketInputStream *in, PacketOutputStream *out)
 34 {
 35     JNIEnv *env;
 36     jthreadGroup group;
 37 
 38     env = getEnv();
 39 
 40     group = inStream_readThreadGroupRef(env, in);
 41     if (inStream_error(in)) {
 42         return JNI_TRUE;
 43     }
 44 
 45     WITH_LOCAL_REFS(env, 1) {
 46 
 47         jvmtiThreadGroupInfo info;
 48 
 49         (void)memset(&info, 0, sizeof(info));
 50         threadGroupInfo(group, &info);
 51         (void)outStream_writeString(out, info.name == NULL ? "" : info.name);
 52         if ( info.name != NULL )
 53             jvmtiDeallocate(info.name);
 54 
 55     } END_WITH_LOCAL_REFS(env);
 56 
 57     return JNI_TRUE;
 58 }
 59 
 60 static jboolean
 61 parent(PacketInputStream *in, PacketOutputStream *out)
 62 {
 63     JNIEnv *env;
 64     jthreadGroup group;
 65 
 66     env = getEnv();
 67 
 68     group = inStream_readThreadGroupRef(env, in);
 69     if (inStream_error(in)) {
 70         return JNI_TRUE;
 71     }
 72 
 73     WITH_LOCAL_REFS(env, 1) {
 74 
 75         jvmtiThreadGroupInfo info;
 76 
 77         (void)memset(&info, 0, sizeof(info));
 78         threadGroupInfo(group, &info);
 79         (void)outStream_writeObjectRef(env, out, info.parent);
 80         if ( info.name != NULL )
 81             jvmtiDeallocate(info.name);
 82 
 83     } END_WITH_LOCAL_REFS(env);
 84 
 85     return JNI_TRUE;
 86 }
 87 
 88 static jboolean
 89 children(PacketInputStream *in, PacketOutputStream *out)
 90 {
 91      JNIEnv *env;
 92      jthreadGroup group;
 93      jboolean is_vthread_group;
 94 
 95      env = getEnv();
 96 
 97      group = inStream_readThreadGroupRef(env, in);
 98      if (inStream_error(in)) {
 99          return JNI_TRUE;
100      }
101 
102      is_vthread_group = isSameObject(env, group, gdata->vthreadThreadGroup);
103 
104      WITH_LOCAL_REFS(env, 2) {
105 
106          jvmtiError error = JVMTI_ERROR_NONE;
107          jint threadCount;
108          jint vthreadCount = 0;
109          jint groupCount;
110          jthread *theThreads;
111          jthread *theVThreads = NULL;
112          jthread *theGroups;
113 
114          if (is_vthread_group) {
115              if (gdata->enumerateVThreads) {
116                  /* Get all the VThreads so we can return them. */
117                  theVThreads = threadControl_allVThreads(&vthreadCount);
118                  if (theVThreads == NULL && vthreadCount != 0) {
119                      error = JVMTI_ERROR_OUT_OF_MEMORY;
120                  }
121              }
122          }
123 
124          if (error == JVMTI_ERROR_NONE) {
125              /* Get all the threads in this group so we can return them. */
126              error = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadGroupChildren)(gdata->jvmti, group,
127                                               &threadCount,&theThreads,
128                                               &groupCount, &theGroups);
129          }
130 
131          if (error != JVMTI_ERROR_NONE) {
132              outStream_setError(out, map2jdwpError(error));
133          } else {

134              int i;
135 
136              /* Squish out all of the debugger-spawned threads */
137              threadCount = filterDebugThreads(theThreads, threadCount);
138 
139              (void)outStream_writeInt(out, threadCount + vthreadCount);
140              for (i = 0; i < threadCount; i++) {
141                  (void)outStream_writeObjectRef(env, out, theThreads[i]);
142              }
143              for (i = 0; i < vthreadCount; i++) {
144                  (void)outStream_writeObjectRef(env, out, theVThreads[i]);
145              }
146              (void)outStream_writeInt(out, groupCount);
147              for (i = 0; i < groupCount; i++) {
148                  (void)outStream_writeObjectRef(env, out, theGroups[i]);
149              }
150 
151              jvmtiDeallocate(theGroups);
152              jvmtiDeallocate(theThreads);
153              jvmtiDeallocate(theVThreads);
154          }
155 
156      } END_WITH_LOCAL_REFS(env);
157 
158      return JNI_TRUE;
159 }
160 
161 Command ThreadGroupReference_Commands[] = {
162     {name, "Name"},
163     {parent, "Parent"},
164     {children, "Children"}
165 };
166 
167 DEBUG_DISPATCH_DEFINE_CMDSET(ThreadGroupReference)
--- EOF ---