Android 开机Process xxx (pid xxxx) has died问题分析,35岁技术人如何转型做管理

mAllowLowerMemLevel = false;

doLowMem = false;

}

EventLog.writeEvent(EventLogTags.AM_PROC_DIED, app.userId, app.pid, app.processName);

if (DEBUG_CLEANUP) Slog.v(

TAG, "Dying app: " + app + ", pid: " + pid

  • ", thread: " + thread.asBinder());

handleAppDiedLocked(app, false, true);

if (doOomAdj) {

updateOomAdjLocked();

}

if (doLowMem) {

doLowMemReportIfNeededLocked(app);

}

} else if (app.pid != pid) {

// A new process has already been started.

Slog.i(TAG, "Process " + app.processName + " (pid " + pid

  • ") has died and restarted (pid " + app.pid + “).”);

EventLog.writeEvent(EventLogTags.AM_PROC_DIED, app.userId, app.pid, app.processName);

} else if (DEBUG_PROCESSES) {

Slog.d(TAG, "Received spurious death notification for thread "

  • thread.asBinder());

}

}

可以看到app.killedByAm = false,也就是说不是ActivityManager主动kill该应用,而是LowMemory的原因(for RAM)。

ProcessRecord里属性:

private final BatteryStatsImpl mBatteryStats; // where to collect runtime statistics

final ApplicationInfo info; // all about the first app in the process

final boolean isolated; // true if this is a special isolated process

final int uid; // uid of process; may be different from ‘info’ if isolated

final int userId; // user of process.

final String processName; // name of the process

// List of packages running in the process

final ArrayMap pkgList

= new ArrayMap();

ArraySet pkgDeps; // additional packages we have a dependency on

IApplicationThread thread; // the actual proc… may be null only if

// ‘persistent’ is true (in which case we

// are in the process of launching the app)

ProcessStats.ProcessState baseProcessTracker;

BatteryStatsImpl.Uid.Proc curProcBatteryStats;

int pid; // The process of this application; 0 if none

int[] gids; // The gids this process was launched with

String requiredAbi; // The ABI this process was launched with

String instructionSet; // The instruction set this process was launched with

boolean starting; // True if the process is being started

long lastActivityTime; // For managing the LRU list

long lastPssTime; // Last time we retrieved PSS data

long nextPssTime; // Next time we want to request PSS data

long lastStateTime; // Last time setProcState changed

long initialIdlePss; // Initial memory pss of process for idle maintenance.

long lastPss; // Last computed memory pss.

long lastCachedPss; // Last computed pss when in cached state.

int maxAdj; // Maximum OOM adjustment for this process

int curRawAdj; // Current OOM unlimited adjustment for this process

int setRawAdj; // Last set OOM unlimited adjustment for this process

int curAdj; // Current OOM adjustment for this process

int setAdj; // Last set OOM adjustment for this process

int curSchedGroup; // Currently desired scheduling class

int setSchedGroup; // Last set to background scheduling class

int trimMemoryLevel; // Last selected memory trimming level

int curProcState = -1; // Currently computed process state: ActivityManager.PROCESS_STATE_*

int repProcState = -1; // Last reported process state

int setProcState = -1; // Last set process state in process tracker

int pssProcState = -1; // The proc state we are currently requesting pss for

boolean serviceb; // Process currently is on the service B list

boolean serviceHighRam; // We are forcing to service B list due to its RAM use

boolean setIsForeground; // Running foreground UI when last set?

boolean notCachedSinceIdle; // Has this process not been in a cached state since last idle?

boolean hasClientActivities; // Are there any client services with activities?

boolean hasStartedServices; // Are there any started services running in this process?

boolean foregroundServices; // Running any services that are foreground?

boolean foregroundActivities; // Running any activities that are foreground?

boolean repForegroundActivities; // Last reported foreground activities.

boolean systemNoUi; // This is a system process, but not currently showing UI.

boolean hasShownUi; // Has UI been shown in this process since it was started?

boolean pendingUiClean; // Want to clean up resources from showing UI?

boolean hasAboveClient; // Bound using BIND_ABOVE_CLIENT, so want to be lower

boolean treatLikeActivity; // Bound using BIND_TREAT_LIKE_ACTIVITY

boolean bad; // True if disabled in the bad process list

boolean killedByAm; // True when proc has been killed by activity manager, not for RAM

boolean killed; // True once we know the process has been killed

boolean procStateChanged; // Keep track of whether we changed ‘setAdj’.

String waitingToKill; // Process is waiting to be killed when in the bg, and reason

IBinder forcingToForeground;// Token that is forcing this process to be foreground

int adjSeq; // Sequence id for identifying oom_adj assignment cycles

int lruSeq; // Sequence id for identifying LRU update cycles

CompatibilityInfo compat; // last used compatibility mode

IBinder.DeathRecipient deathRecipient; // Who is watching for the death.

ComponentName instrumentationClass;// class installed to instrument app

ApplicationInfo instrumentationInfo; // the application being instrumented

String instr

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umentationProfileFile; // where to save profiling

IInstrumentationWatcher instrumentationWatcher; // who is waiting

IUiAutomationConnection instrumentationUiAutomationConnection; // Connection to use the UI introspection APIs.

Bundle instrumentationArguments;// as given to us

ComponentName instrumentationResultClass;// copy of instrumentationClass

boolean usingWrapper; // Set to true when process was launched with a wrapper attached

BroadcastRecord curReceiver;// receiver currently running in the app

long lastWakeTime; // How long proc held wake lock at last check

long lastCpuTime; // How long proc has run CPU at last check

long curCpuTime; // How long proc has run CPU most recently

long lastRequestedGc; // When we last asked the app to do a gc

long lastLowMemory; // When we last told the app that memory is low

boolean reportLowMemory; // Set to true when waiting to report low mem

boolean empty; // Is this an empty background process?

boolean cached; // Is this a cached process?

String adjType; // Debugging: primary thing impacting oom_adj.

int adjTypeCode; // Debugging: adj code to report to app.

Object adjSource; // Debugging: option dependent object.

int adjSourceProcState; // Debugging: proc state of adjSource’s process.

Object adjTarget; // Debugging: target component impacting oom_adj.

Runnable crashHandler; // Optional local handler to be invoked in the process crash.

过滤掉特定应用:

if (!app.killed) {

Process.killProcessQuiet(pid);

Process.killProcessGroup(app.uid, pid);

app.killed = true;

}

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