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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.ddmuilib.heap;
     18 
     19 import com.android.ddmlib.NativeAllocationInfo;
     20 import com.android.ddmlib.NativeStackCallInfo;
     21 
     22 import java.util.ArrayList;
     23 import java.util.Collections;
     24 import java.util.Comparator;
     25 import java.util.HashMap;
     26 import java.util.List;
     27 import java.util.Map;
     28 
     29 /**
     30  * A heap dump representation where each call site is associated with its source library.
     31  */
     32 public final class NativeLibraryAllocationInfo {
     33     /** Library name to use when grouping before symbol resolution is complete. */
     34     public static final String UNRESOLVED_LIBRARY_NAME = "Resolving..";
     35 
     36     /** Any call site that cannot be resolved to a specific library goes under this name. */
     37     private static final String UNKNOWN_LIBRARY_NAME = "unknown";
     38 
     39     private final String mLibraryName;
     40     private final List<NativeAllocationInfo> mHeapAllocations;
     41     private int mTotalSize;
     42 
     43     private NativeLibraryAllocationInfo(String libraryName) {
     44         mLibraryName = libraryName;
     45         mHeapAllocations = new ArrayList<NativeAllocationInfo>();
     46     }
     47 
     48     private void addAllocation(NativeAllocationInfo info) {
     49         mHeapAllocations.add(info);
     50     }
     51 
     52     private void updateTotalSize() {
     53         mTotalSize = 0;
     54         for (NativeAllocationInfo i : mHeapAllocations) {
     55             mTotalSize += i.getAllocationCount() * i.getSize();
     56         }
     57     }
     58 
     59     public String getLibraryName() {
     60         return mLibraryName;
     61     }
     62 
     63     public long getTotalSize() {
     64         return mTotalSize;
     65     }
     66 
     67     public List<NativeAllocationInfo> getAllocations() {
     68         return mHeapAllocations;
     69     }
     70 
     71     /**
     72      * Factory method to create a list of {@link NativeLibraryAllocationInfo} objects,
     73      * given the list of {@link NativeAllocationInfo} objects.
     74      *
     75      * If the {@link NativeAllocationInfo} objects do not have their symbols resolved,
     76      * then they are grouped under the library {@link #UNRESOLVED_LIBRARY_NAME}. If they do
     77      * have their symbols resolved, but map to an unknown library, then they are grouped under
     78      * the library {@link #UNKNOWN_LIBRARY_NAME}.
     79      */
     80     public static List<NativeLibraryAllocationInfo> constructFrom(
     81             List<NativeAllocationInfo> allocations) {
     82         if (allocations == null) {
     83             return null;
     84         }
     85 
     86         Map<String, NativeLibraryAllocationInfo> allocationsByLibrary =
     87                 new HashMap<String, NativeLibraryAllocationInfo>();
     88 
     89         // go through each native allocation and assign it to the appropriate library
     90         for (NativeAllocationInfo info : allocations) {
     91             String libName = UNRESOLVED_LIBRARY_NAME;
     92 
     93             if (info.isStackCallResolved()) {
     94                 NativeStackCallInfo relevantStackCall = info.getRelevantStackCallInfo();
     95                 if (relevantStackCall != null) {
     96                     libName = relevantStackCall.getLibraryName();
     97                 } else {
     98                     libName = UNKNOWN_LIBRARY_NAME;
     99                 }
    100             }
    101 
    102             addtoLibrary(allocationsByLibrary, libName, info);
    103         }
    104 
    105         List<NativeLibraryAllocationInfo> libraryAllocations =
    106                 new ArrayList<NativeLibraryAllocationInfo>(allocationsByLibrary.values());
    107 
    108         // now update some summary statistics for each library
    109         for (NativeLibraryAllocationInfo l : libraryAllocations) {
    110             l.updateTotalSize();
    111         }
    112 
    113         // finally, sort by total size
    114         Collections.sort(libraryAllocations, new Comparator<NativeLibraryAllocationInfo>() {
    115                     public int compare(NativeLibraryAllocationInfo o1,
    116                             NativeLibraryAllocationInfo o2) {
    117                         return (int) (o2.getTotalSize() - o1.getTotalSize());
    118                     }
    119                 });
    120 
    121         return libraryAllocations;
    122     }
    123 
    124     private static void addtoLibrary(Map<String, NativeLibraryAllocationInfo> libraryAllocations,
    125             String libName, NativeAllocationInfo info) {
    126         NativeLibraryAllocationInfo libAllocationInfo = libraryAllocations.get(libName);
    127         if (libAllocationInfo == null) {
    128             libAllocationInfo = new NativeLibraryAllocationInfo(libName);
    129             libraryAllocations.put(libName, libAllocationInfo);
    130         }
    131 
    132         libAllocationInfo.addAllocation(info);
    133     }
    134 }
    135