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