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      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 };
    142