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 // Runs continuously as a target for the sampling perf profiler tests. perfetto_busy_wait()40__attribute__((noreturn)) void perfetto_busy_wait() { 41 for (volatile unsigned i = 0;; i++) { 42 } 43 } 44 45 } // namespace 46 47 extern "C" JNIEXPORT void JNICALL Java_android_perfetto_cts_app_MainActivity_runNative(JNIEnv *,jclass)48Java_android_perfetto_cts_app_MainActivity_runNative(JNIEnv*, jclass) { 49 perfetto_test_allocations(); 50 } 51 52 extern "C" JNIEXPORT void JNICALL Java_android_perfetto_cts_app_BusyWaitActivity_runNativeBusyWait(JNIEnv *,jclass)53Java_android_perfetto_cts_app_BusyWaitActivity_runNativeBusyWait(JNIEnv*, 54 jclass) { 55 perfetto_busy_wait(); 56 } 57