1 /*
2  * Copyright (C) 2019 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 <dlfcn.h>
18 #include <malloc.h>
19 #include <stdint.h>
20 
21 #include <string>
22 
23 #include <gtest/gtest.h>
24 
25 #include "TestUtils.h"
26 
27 namespace unwindstack {
28 
TestCheckForLeaks(void (* unwind_func)(void *),void * data)29 void TestCheckForLeaks(void (*unwind_func)(void*), void* data) {
30   static constexpr size_t kNumLeakLoops = 200;
31   static constexpr size_t kMaxAllowedLeakBytes = 32 * 1024;
32 
33   size_t first_allocated_bytes = 0;
34   size_t last_allocated_bytes = 0;
35   for (size_t i = 0; i < kNumLeakLoops; i++) {
36     unwind_func(data);
37 
38     size_t allocated_bytes = mallinfo().uordblks;
39     if (first_allocated_bytes == 0) {
40       first_allocated_bytes = allocated_bytes;
41     } else if (last_allocated_bytes > first_allocated_bytes) {
42       // Check that the memory did not increase too much over the first loop.
43       ASSERT_LE(last_allocated_bytes - first_allocated_bytes, kMaxAllowedLeakBytes)
44           << "Failed on loop " << i + 1;
45     }
46     last_allocated_bytes = allocated_bytes;
47   }
48 }
49 
GetTestLibHandle()50 void* GetTestLibHandle() {
51   std::string testlib(testing::internal::GetArgvs()[0]);
52   auto const value = testlib.find_last_of('/');
53   if (value != std::string::npos) {
54     testlib = testlib.substr(0, value + 1);
55   } else {
56     testlib = "";
57   }
58   testlib += "libunwindstack_local.so";
59 
60   return dlopen(testlib.c_str(), RTLD_NOW);
61 }
62 
63 }  // namespace unwindstack
64