LeakChecker.cpp revision 7dc370bfe3223dfbcb368e0006c688dfd668ab01 
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
28using namespace std;
29
30namespace android {
31namespace uirenderer {
32namespace test {
33
34static 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
69void 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    nsecs_t before = systemTime();
74    UnreachableMemoryInfo rtMemInfo;
75    TestUtils::runOnRenderThread([&rtMemInfo](renderthread::RenderThread& thread) {
76        if (Caches::hasInstance()) {
77            Caches::getInstance().tasks.stop();
78        }
79        // Check for leaks
80        if (!GetUnreachableMemory(rtMemInfo)) {
81            cerr << "Failed to get unreachable memory!" << endl;
82            return;
83        }
84    });
85    UnreachableMemoryInfo uiMemInfo;
86    if (!GetUnreachableMemory(uiMemInfo)) {
87        cerr << "Failed to get unreachable memory!" << endl;
88        return;
89    }
90    logUnreachable({rtMemInfo, uiMemInfo});
91    nsecs_t after = systemTime();
92    cout << "Leak check took " << ns2ms(after - before) << "ms" << endl;
93}
94
95} /* namespace test */
96} /* namespace uirenderer */
97} /* namespace android */
98