content: /*
   * Copyright (C) 2007 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.ddm;
  
  import org.apache.harmony.dalvik.ddmc.Chunk;
  import org.apache.harmony.dalvik.ddmc.ChunkHandler;
  import org.apache.harmony.dalvik.ddmc.DdmServer;
  import org.apache.harmony.dalvik.ddmc.DdmVmInternal;
  import android.os.Debug;
  import android.util.Log;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  
  /**
   * Handle native and virtual heap requests.
   */
  public class DdmHandleHeap extends ChunkHandler {
  
      public static final int CHUNK_HPIF = type("HPIF");
      public static final int CHUNK_HPSG = type("HPSG");
      public static final int CHUNK_HPDU = type("HPDU");
      public static final int CHUNK_HPDS = type("HPDS");
      public static final int CHUNK_NHSG = type("NHSG");
      public static final int CHUNK_HPGC = type("HPGC");
      public static final int CHUNK_REAE = type("REAE");
      public static final int CHUNK_REAQ = type("REAQ");
      public static final int CHUNK_REAL = type("REAL");
  
      private static DdmHandleHeap mInstance = new DdmHandleHeap();
  
  
      /* singleton, do not instantiate */
      private DdmHandleHeap() {}
  
      /**
       * Register for the messages we're interested in.
       */
      public static void register() {
          DdmServer.registerHandler(CHUNK_HPIF, mInstance);
          DdmServer.registerHandler(CHUNK_HPSG, mInstance);
          DdmServer.registerHandler(CHUNK_HPDU, mInstance);
          DdmServer.registerHandler(CHUNK_HPDS, mInstance);
          DdmServer.registerHandler(CHUNK_NHSG, mInstance);
          DdmServer.registerHandler(CHUNK_HPGC, mInstance);
          DdmServer.registerHandler(CHUNK_REAE, mInstance);
          DdmServer.registerHandler(CHUNK_REAQ, mInstance);
          DdmServer.registerHandler(CHUNK_REAL, mInstance);
      }
  
      /**
       * Called when the DDM server connects.  The handler is allowed to
       * send messages to the server.
       */
      public void connected() {}
  
      /**
       * Called when the DDM server disconnects.  Can be used to disable
       * periodic transmissions or clean up saved state.
       */
      public void disconnected() {}
  
      /**
       * Handle a chunk of data.
       */
      public Chunk handleChunk(Chunk request) {
          if (false)
              Log.v("ddm-heap", "Handling " + name(request.type) + " chunk");
          int type = request.type;
  
          if (type == CHUNK_HPIF) {
              return handleHPIF(request);
          } else if (type == CHUNK_HPSG) {
              return handleHPSGNHSG(request, false);
          } else if (type == CHUNK_HPDU) {
              return handleHPDU(request);
          } else if (type == CHUNK_HPDS) {
              return handleHPDS(request);
          } else if (type == CHUNK_NHSG) {
              return handleHPSGNHSG(request, true);
          } else if (type == CHUNK_HPGC) {
              return handleHPGC(request);
          } else if (type == CHUNK_REAE) {
              return handleREAE(request);
          } else if (type == CHUNK_REAQ) {
              return handleREAQ(request);
          } else if (type == CHUNK_REAL) {
              return handleREAL(request);
          } else {
              throw new RuntimeException("Unknown packet "
                  + ChunkHandler.name(type));
          }
      }
  
      /*
       * Handle a "HeaP InFo" request.
       */
      private Chunk handleHPIF(Chunk request) {
          ByteBuffer in = wrapChunk(request);
  
          int when = in.get();
          if (false)
              Log.v("ddm-heap", "Heap segment enable: when=" + when);
  
          boolean ok = DdmVmInternal.heapInfoNotify(when);
          if (!ok) {
              return createFailChunk(1, "Unsupported HPIF what");
          } else {
              return null;        // empty response
          }
      }
  
      /*
       * Handle a "HeaP SeGment" or "Native Heap SeGment" request.
       */
      private Chunk handleHPSGNHSG(Chunk request, boolean isNative) {
          ByteBuffer in = wrapChunk(request);
  
          int when = in.get();
          int what = in.get();
          if (false)
              Log.v("ddm-heap", "Heap segment enable: when=" + when
                  + ", what=" + what + ", isNative=" + isNative);
  
          boolean ok = DdmVmInternal.heapSegmentNotify(when, what, isNative);
          if (!ok) {
              return createFailChunk(1, "Unsupported HPSG what/when");
          } else {
              // TODO: if "when" is non-zero and we want to see a dump
              //       right away, initiate a GC.
              return null;        // empty response
          }
      }
  
      /*
       * Handle a "HeaP DUmp" request.
       *
       * This currently just returns a result code.  We could pull up
       * the entire contents of the file and return them, but hprof dump
       * files can be a few megabytes.
       */
      private Chunk handleHPDU(Chunk request) {
          ByteBuffer in = wrapChunk(request);
          byte result;
  
          /* get the filename for the output file */
          int len = in.getInt();
          String fileName = getString(in, len);
          if (false)
              Log.d("ddm-heap", "Heap dump: file='" + fileName + "'");
  
          try {
              Debug.dumpHprofData(fileName);
              result = 0;
          } catch (UnsupportedOperationException uoe) {
              Log.w("ddm-heap", "hprof dumps not supported in this VM");
              result = -1;
          } catch (IOException ioe) {
              result = -1;
          } catch (RuntimeException re) {
              result = -1;
          }
  
          /* create a non-empty reply so the handler fires on completion */
          byte[] reply = { result };
          return new Chunk(CHUNK_HPDU, reply, 0, reply.length);
      }
  
      /*
       * Handle a "HeaP Dump Streaming" request.
       *
       * This tells the VM to create a heap dump and send it directly to
       * DDMS.  The dumps are large enough that we don't want to copy the
       * data into a byte[] and send it from here.
       */
      private Chunk handleHPDS(Chunk request) {
          ByteBuffer in = wrapChunk(request);
          byte result;
  
          /* get the filename for the output file */
          if (false)
              Log.d("ddm-heap", "Heap dump: [DDMS]");
  
          String failMsg = null;
          try {
              Debug.dumpHprofDataDdms();
          } catch (UnsupportedOperationException uoe) {
              failMsg = "hprof dumps not supported in this VM";
          } catch (RuntimeException re) {
              failMsg = "Exception: " + re.getMessage();
          }
  
          if (failMsg != null) {
              Log.w("ddm-heap", failMsg);
              return createFailChunk(1, failMsg);
          } else {
              return null;
          }
      }
  
      /*
       * Handle a "HeaP Garbage Collection" request.
       */
      private Chunk handleHPGC(Chunk request) {
          //ByteBuffer in = wrapChunk(request);
  
          if (false)
              Log.d("ddm-heap", "Heap GC request");
          Runtime.getRuntime().gc();
  
          return null;        // empty response
      }
  
      /*
       * Handle a "REcent Allocation Enable" request.
       */
      private Chunk handleREAE(Chunk request) {
          ByteBuffer in = wrapChunk(request);
          boolean enable;
  
          enable = (in.get() != 0);
  
          if (false)
              Log.d("ddm-heap", "Recent allocation enable request: " + enable);
  
          DdmVmInternal.enableRecentAllocations(enable);
  
          return null;        // empty response
      }
  
      /*
       * Handle a "REcent Allocation Query" request.
       */
      private Chunk handleREAQ(Chunk request) {
          //ByteBuffer in = wrapChunk(request);
  
          byte[] reply = new byte[1];
          reply[0] = DdmVmInternal.getRecentAllocationStatus() ? (byte)1 :(byte)0;
          return new Chunk(CHUNK_REAQ, reply, 0, reply.length);
      }
  
      /*
       * Handle a "REcent ALlocations" request.
       */
      private Chunk handleREAL(Chunk request) {
          //ByteBuffer in = wrapChunk(request);
  
          if (false)
              Log.d("ddm-heap", "Recent allocations request");
  
          /* generate the reply in a ready-to-go format */
          byte[] reply = DdmVmInternal.getRecentAllocations();
          return new Chunk(CHUNK_REAL, reply, 0, reply.length);
      }
  }
  
  