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
   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 "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 };