| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "ProcessInfo" |
| #include <utils/Log.h> |
| |
| #include <media/stagefright/ProcessInfo.h> |
| |
| #include <binder/IPCThreadState.h> |
| #include <binder/IProcessInfoService.h> |
| #include <binder/IServiceManager.h> |
| #include <private/android_filesystem_config.h> |
| |
| namespace android { |
| |
| static constexpr int32_t INVALID_ADJ = -10000; |
| static constexpr int32_t NATIVE_ADJ = -1000; |
| |
| ProcessInfo::ProcessInfo() {} |
| |
| bool ProcessInfo::getPriority(int pid, int* priority) { |
| sp<IBinder> binder = defaultServiceManager()->getService(String16("processinfo")); |
| sp<IProcessInfoService> service = interface_cast<IProcessInfoService>(binder); |
| |
| size_t length = 1; |
| int32_t state; |
| int32_t score = INVALID_ADJ; |
| status_t err = service->getProcessStatesAndOomScoresFromPids(length, &pid, &state, &score); |
| if (err != OK) { |
| ALOGE("getProcessStatesAndOomScoresFromPids failed"); |
| return false; |
| } |
| ALOGV("pid %d state %d score %d", pid, state, score); |
| if (score <= NATIVE_ADJ) { |
| std::scoped_lock lock{mOverrideLock}; |
| |
| // If this process if not tracked by ActivityManagerService, look for overrides. |
| auto it = mOverrideMap.find(pid); |
| if (it != mOverrideMap.end()) { |
| ALOGI("pid %d invalid OOM score %d, override to %d", pid, score, it->second.oomScore); |
| score = it->second.oomScore; |
| } else { |
| ALOGE("pid %d invalid OOM score %d", pid, score); |
| return false; |
| } |
| } |
| |
| // Use OOM adjustments value as the priority. Lower the value, higher the priority. |
| *priority = score; |
| return true; |
| } |
| |
| bool ProcessInfo::isValidPid(int pid) { |
| int callingPid = IPCThreadState::self()->getCallingPid(); |
| int callingUid = IPCThreadState::self()->getCallingUid(); |
| // Trust it if this is called from the same process otherwise pid has to match the calling pid. |
| return (callingPid == getpid()) || (callingPid == pid) || (callingUid == AID_MEDIA); |
| } |
| |
| bool ProcessInfo::overrideProcessInfo(int pid, int procState, int oomScore) { |
| std::scoped_lock lock{mOverrideLock}; |
| |
| mOverrideMap.erase(pid); |
| |
| // Disable the override if oomScore is set to NATIVE_ADJ or below. |
| if (oomScore <= NATIVE_ADJ) { |
| return false; |
| } |
| |
| mOverrideMap.emplace(pid, ProcessInfoOverride{procState, oomScore}); |
| return true; |
| } |
| |
| void ProcessInfo::removeProcessInfoOverride(int pid) { |
| std::scoped_lock lock{mOverrideLock}; |
| |
| mOverrideMap.erase(pid); |
| } |
| |
| ProcessInfo::~ProcessInfo() {} |
| |
| } // namespace android |