1 /*
2  * Copyright (C) 2016 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 #include "LeakChecker.h"
18 
19 #include "Caches.h"
20 #include "TestUtils.h"
21 
22 #include <cstdio>
23 #include <iostream>
24 #include <memunreachable/memunreachable.h>
25 #include <unistd.h>
26 #include <unordered_set>
27 
28 using namespace std;
29 
30 namespace android {
31 namespace uirenderer {
32 namespace test {
33 
logUnreachable(initializer_list<UnreachableMemoryInfo> infolist)34 static void logUnreachable(initializer_list<UnreachableMemoryInfo> infolist) {
35     // merge them all
36     UnreachableMemoryInfo merged;
37     unordered_set<uintptr_t> addrs;
38     merged.allocation_bytes = 0;
39     merged.leak_bytes = 0;
40     merged.num_allocations = 0;
41     merged.num_leaks = 0;
42     for (auto& info : infolist) {
43         // We'll be a little hazzy about these ones and just hope the biggest
44         // is the most accurate
45         merged.allocation_bytes = max(merged.allocation_bytes, info.allocation_bytes);
46         merged.num_allocations = max(merged.num_allocations, info.num_allocations);
47         for (auto& leak : info.leaks) {
48              if (addrs.find(leak.begin) == addrs.end()) {
49                  merged.leaks.push_back(leak);
50                  merged.num_leaks++;
51                  merged.leak_bytes += leak.size;
52                  addrs.insert(leak.begin);
53              }
54         }
55     }
56 
57     // Now log the result
58     if (merged.num_leaks) {
59         cout << endl << "Leaked memory!" << endl;
60         if (!merged.leaks[0].backtrace.num_frames) {
61             cout << "Re-run with 'setprop libc.debug.malloc.program hwui_unit_test'"
62                     << endl << "and 'setprop libc.debug.malloc.options backtrace=8'"
63                     << " to get backtraces" << endl;
64         }
65         cout << merged.ToString(false);
66     }
67 }
68 
checkForLeaks()69 void LeakChecker::checkForLeaks() {
70     // TODO: Until we can shutdown the RT thread we need to do this in
71     // two passes as GetUnreachableMemory has limited insight into
72     // thread-local caches so some leaks will not be properly tagged as leaks
73     UnreachableMemoryInfo rtMemInfo;
74     TestUtils::runOnRenderThread([&rtMemInfo](renderthread::RenderThread& thread) {
75         if (Caches::hasInstance()) {
76             Caches::getInstance().tasks.stop();
77         }
78         // Check for leaks
79         if (!GetUnreachableMemory(rtMemInfo)) {
80             cerr << "Failed to get unreachable memory!" << endl;
81             return;
82         }
83     });
84     UnreachableMemoryInfo uiMemInfo;
85     if (!GetUnreachableMemory(uiMemInfo)) {
86         cerr << "Failed to get unreachable memory!" << endl;
87         return;
88     }
89     logUnreachable({rtMemInfo, uiMemInfo});
90 }
91 
92 } /* namespace test */
93 } /* namespace uirenderer */
94 } /* namespace android */
95