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