1 /*
2 * Copyright (C) 2022 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 <cstdint>
18 #define LOG_TAG "sharedtest"
19 #include <utils/Log.h>
20
21 // Test library which is dynamicly loaded by library_tests.
22
23 // Static variable construction.
24 // Calls A constructor on library load, A destructor on library unload.
25
26 int32_t *gPtr = nullptr; // this pointer is filled with the location to set memory
27 // when ~A() is called.
28 // we cannot use anything internal to this file as the
29 // data segment may no longer exist after unloading the library.
30 struct A {
AA31 A() {
32 ALOGD("%s: gPtr:%p", __func__, gPtr);
33 }
34
~AA35 ~A() {
36 ALOGD("%s: gPtr:%p", __func__, gPtr);
37 if (gPtr != nullptr) {
38 *gPtr = 1;
39 }
40 }
41 } gA;
42
43 // __attribute__((constructor)) methods occur before any static variable construction.
44 // Libraries that use __attribute__((constructor)) should not rely on global constructors
45 // before method call because they will not be initialized before use.
46 // See heapprofd_client_api.
47 // NOTE: is this right? Shouldn't it occur after construction?
48 __attribute__((constructor))
onConstruction()49 void onConstruction() {
50 ALOGD("%s: in progress", __func__); // for logcat analysis
51 }
52
53 // __attribute__((destructor)) methods occur before any static variable destruction.
54 __attribute__((destructor))
onDestruction()55 void onDestruction() {
56 ALOGD("%s: in progress", __func__); // for logcat analysis
57 }
58