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 <jni.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 
21 namespace {
22 
23 // Must be kept in sync with heapprofd_test_cts.cc
24 constexpr int kIndividualAllocSz = 4153;
25 constexpr int kAllocationIntervalUs = 10 * 1000;
26 
perfetto_test_allocations()27 __attribute__((noreturn)) void perfetto_test_allocations() {
28   for (;;) {
29     // volatile & use avoids builtin malloc optimizations
30     volatile char* x = static_cast<char*>(malloc(kIndividualAllocSz));
31     if (x) {
32       x[0] = '\0';
33       free(const_cast<char*>(x));
34     }
35     usleep(kAllocationIntervalUs);
36   }
37 }
38 
39 }  // namespace
40 
41 extern "C" JNIEXPORT void JNICALL
Java_android_perfetto_cts_app_MainActivity_runNative(JNIEnv *,jclass)42 Java_android_perfetto_cts_app_MainActivity_runNative(JNIEnv*, jclass) {
43   perfetto_test_allocations();
44 }
45