mirror of
https://github.com/mozilla/gecko-dev.git
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578 lines
22 KiB
Java
578 lines
22 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko;
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import java.io.BufferedOutputStream;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.Reader;
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import java.util.UUID;
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import java.util.regex.Pattern;
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import org.json.JSONObject;
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import org.mozilla.gecko.util.ThreadUtils;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.os.Handler;
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import android.os.Looper;
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import android.util.Log;
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public final class ANRReporter extends BroadcastReceiver
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{
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private static final boolean DEBUG = false;
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private static final String LOGTAG = "GeckoANRReporter";
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private static final String ANR_ACTION = "android.intent.action.ANR";
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// Number of lines to search traces.txt to decide whether it's a Gecko ANR
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private static final int LINES_TO_IDENTIFY_TRACES = 10;
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// ANRs may happen because of memory pressure,
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// so don't use up too much memory here
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// Size of buffer to hold one line of text
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private static final int TRACES_LINE_SIZE = 100;
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// Size of block to use when processing traces.txt
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private static final int TRACES_BLOCK_SIZE = 2000;
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private static final String TRACES_CHARSET = "utf-8";
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private static final String PING_CHARSET = "utf-8";
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private static final ANRReporter sInstance = new ANRReporter();
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private static int sRegisteredCount;
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private Handler mHandler;
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private volatile boolean mPendingANR;
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private static native boolean requestNativeStack(boolean unwind);
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private static native String getNativeStack();
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private static native void releaseNativeStack();
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public static void register(Context context) {
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if (sRegisteredCount++ != 0) {
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// Already registered
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return;
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}
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sInstance.start(context);
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}
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public static void unregister() {
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if (sRegisteredCount == 0) {
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Log.w(LOGTAG, "register/unregister mismatch");
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return;
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}
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if (--sRegisteredCount != 0) {
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// Should still be registered
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return;
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}
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sInstance.stop();
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}
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private void start(final Context context) {
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Thread receiverThread = new Thread(new Runnable() {
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@Override
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public void run() {
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Looper.prepare();
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synchronized (ANRReporter.this) {
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mHandler = new Handler();
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ANRReporter.this.notify();
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}
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if (DEBUG) {
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Log.d(LOGTAG, "registering receiver");
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}
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context.registerReceiver(ANRReporter.this,
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new IntentFilter(ANR_ACTION),
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null,
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mHandler);
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Looper.loop();
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if (DEBUG) {
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Log.d(LOGTAG, "unregistering receiver");
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}
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context.unregisterReceiver(ANRReporter.this);
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mHandler = null;
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}
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}, LOGTAG);
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receiverThread.setDaemon(true);
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receiverThread.start();
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}
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private void stop() {
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synchronized (this) {
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while (mHandler == null) {
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try {
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wait(1000);
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if (mHandler == null) {
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// We timed out; just give up. The process is probably
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// quitting anyways, so we let the OS do the clean up
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Log.w(LOGTAG, "timed out waiting for handler");
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return;
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}
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} catch (InterruptedException e) {
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}
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}
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}
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Looper looper = mHandler.getLooper();
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looper.quit();
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try {
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looper.getThread().join();
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} catch (InterruptedException e) {
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}
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}
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private ANRReporter() {
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}
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// Return the "traces.txt" file, or null if there is no such file
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private static File getTracesFile() {
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try {
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// getprop [prop-name [default-value]]
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Process propProc = (new ProcessBuilder())
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.command("/system/bin/getprop", "dalvik.vm.stack-trace-file")
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.redirectErrorStream(true)
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.start();
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try {
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BufferedReader buf = new BufferedReader(
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new InputStreamReader(propProc.getInputStream()), TRACES_LINE_SIZE);
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String propVal = buf.readLine();
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if (DEBUG) {
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Log.d(LOGTAG, "getprop returned " + String.valueOf(propVal));
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}
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// getprop can return empty string when the prop value is empty
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// or prop is undefined, treat both cases the same way
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if (propVal != null && propVal.length() != 0) {
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File tracesFile = new File(propVal);
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if (tracesFile.isFile() && tracesFile.canRead()) {
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return tracesFile;
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} else if (DEBUG) {
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Log.d(LOGTAG, "cannot access traces file");
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}
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} else if (DEBUG) {
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Log.d(LOGTAG, "empty getprop result");
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}
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} finally {
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propProc.destroy();
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}
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} catch (IOException e) {
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Log.w(LOGTAG, e);
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} catch (ClassCastException e) {
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Log.w(LOGTAG, e); // Bug 975436
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}
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// Check most common location one last time just in case
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File tracesFile = new File("/data/anr/traces.txt");
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if (tracesFile.isFile() && tracesFile.canRead()) {
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return tracesFile;
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}
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return null;
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}
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private static File getPingFile() {
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if (GeckoAppShell.getContext() == null) {
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return null;
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}
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GeckoProfile profile = GeckoAppShell.getGeckoInterface().getProfile();
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if (profile == null) {
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return null;
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}
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File profDir = profile.getDir();
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if (profDir == null) {
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return null;
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}
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File pingDir = new File(profDir, "saved-telemetry-pings");
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pingDir.mkdirs();
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if (!(pingDir.exists() && pingDir.isDirectory())) {
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return null;
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}
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return new File(pingDir, UUID.randomUUID().toString());
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}
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// Return true if the traces file corresponds to a Gecko ANR
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private static boolean isGeckoTraces(String pkgName, File tracesFile) {
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try {
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final String END_OF_PACKAGE_NAME = "([^a-zA-Z0-9_]|$)";
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// Regex for finding our package name in the traces file
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Pattern pkgPattern = Pattern.compile(Pattern.quote(pkgName) + END_OF_PACKAGE_NAME);
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Pattern mangledPattern = null;
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if (!AppConstants.MANGLED_ANDROID_PACKAGE_NAME.equals(pkgName)) {
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mangledPattern = Pattern.compile(Pattern.quote(
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AppConstants.MANGLED_ANDROID_PACKAGE_NAME) + END_OF_PACKAGE_NAME);
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}
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if (DEBUG) {
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Log.d(LOGTAG, "trying to match package: " + pkgName);
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}
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BufferedReader traces = new BufferedReader(
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new FileReader(tracesFile), TRACES_BLOCK_SIZE);
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try {
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for (int count = 0; count < LINES_TO_IDENTIFY_TRACES; count++) {
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String line = traces.readLine();
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if (DEBUG) {
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Log.d(LOGTAG, "identifying line: " + String.valueOf(line));
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}
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if (line == null) {
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if (DEBUG) {
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Log.d(LOGTAG, "reached end of traces file");
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}
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return false;
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}
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if (pkgPattern.matcher(line).find()) {
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// traces.txt file contains our package
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return true;
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}
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if (mangledPattern != null && mangledPattern.matcher(line).find()) {
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// traces.txt file contains our alternate package
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return true;
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}
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}
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} finally {
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traces.close();
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}
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} catch (IOException e) {
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// meh, can't even read from it right. just return false
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}
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return false;
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}
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private static long getUptimeMins() {
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long uptimeMins = (new File("/proc/self/stat")).lastModified();
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if (uptimeMins != 0L) {
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uptimeMins = (System.currentTimeMillis() - uptimeMins) / 1000L / 60L;
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if (DEBUG) {
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Log.d(LOGTAG, "uptime " + String.valueOf(uptimeMins));
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}
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return uptimeMins;
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}
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if (DEBUG) {
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Log.d(LOGTAG, "could not get uptime");
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}
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return 0L;
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}
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/*
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a saved telemetry ping file consists of JSON in the following format,
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{
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"reason": "android-anr-report",
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"slug": "<uuid-string>",
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"payload": <json-object>
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}
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for Android ANR, our JSON payload should look like,
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{
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"ver": 1,
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"simpleMeasurements": {
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"uptime": <uptime>
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},
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"info": {
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"reason": "android-anr-report",
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"OS": "Android",
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...
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},
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"androidANR": "...",
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"androidLogcat": "..."
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}
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*/
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private static int writePingPayload(OutputStream ping,
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String payload) throws IOException {
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byte [] data = payload.getBytes(PING_CHARSET);
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ping.write(data);
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return data.length;
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}
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private static void fillPingHeader(OutputStream ping, String slug)
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throws IOException {
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// ping file header
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byte [] data = ("{" +
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"\"reason\":\"android-anr-report\"," +
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"\"slug\":" + JSONObject.quote(slug) + "," +
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"\"payload\":").getBytes(PING_CHARSET);
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ping.write(data);
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if (DEBUG) {
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Log.d(LOGTAG, "wrote ping header, size = " + String.valueOf(data.length));
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}
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// payload start
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int size = writePingPayload(ping, ("{" +
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"\"ver\":1," +
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"\"simpleMeasurements\":{" +
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"\"uptime\":" + String.valueOf(getUptimeMins()) +
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"}," +
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"\"info\":{" +
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"\"reason\":\"android-anr-report\"," +
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"\"OS\":" + JSONObject.quote(SysInfo.getName()) + "," +
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"\"version\":\"" + String.valueOf(SysInfo.getVersion()) + "\"," +
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"\"appID\":" + JSONObject.quote(AppConstants.MOZ_APP_ID) + "," +
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"\"appVersion\":" + JSONObject.quote(AppConstants.MOZ_APP_VERSION)+ "," +
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"\"appName\":" + JSONObject.quote(AppConstants.MOZ_APP_BASENAME) + "," +
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"\"appBuildID\":" + JSONObject.quote(AppConstants.MOZ_APP_BUILDID) + "," +
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"\"appUpdateChannel\":" + JSONObject.quote(AppConstants.MOZ_UPDATE_CHANNEL) + "," +
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// Technically the platform build ID may be different, but we'll never know
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"\"platformBuildID\":" + JSONObject.quote(AppConstants.MOZ_APP_BUILDID) + "," +
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"\"locale\":" + JSONObject.quote(SysInfo.getLocale()) + "," +
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"\"cpucount\":" + String.valueOf(SysInfo.getCPUCount()) + "," +
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"\"memsize\":" + String.valueOf(SysInfo.getMemSize()) + "," +
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"\"arch\":" + JSONObject.quote(SysInfo.getArchABI()) + "," +
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"\"kernel_version\":" + JSONObject.quote(SysInfo.getKernelVersion()) + "," +
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"\"device\":" + JSONObject.quote(SysInfo.getDevice()) + "," +
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"\"manufacturer\":" + JSONObject.quote(SysInfo.getManufacturer()) + "," +
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"\"hardware\":" + JSONObject.quote(SysInfo.getHardware()) +
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"}," +
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"\"androidANR\":\""));
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if (DEBUG) {
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Log.d(LOGTAG, "wrote metadata, size = " + String.valueOf(size));
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}
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// We are at the start of ANR data
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}
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// Block is a section of the larger input stream, and we want to find pattern within
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// the stream. This is straightforward if the entire pattern is within one block;
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// however, if the pattern spans across two blocks, we have to match both the start of
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// the pattern in the first block and the end of the pattern in the second block.
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// * If pattern is found in block, this method returns the index at the end of the
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// found pattern, which must always be > 0.
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// * If pattern is not found, it returns 0.
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// * If the start of the pattern matches the end of the block, it returns a number
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// < 0, which equals the negated value of how many characters in pattern are already
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// matched; when processing the next block, this number is passed in through
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// prevIndex, and the rest of the characters in pattern are matched against the
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// start of this second block. The method returns value > 0 if the rest of the
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// characters match, or 0 if they do not.
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private static int getEndPatternIndex(String block, String pattern, int prevIndex) {
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if (pattern == null || block.length() < pattern.length()) {
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// Nothing to do
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return 0;
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}
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if (prevIndex < 0) {
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// Last block ended with a partial start; now match start of block to rest of pattern
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if (block.startsWith(pattern.substring(-prevIndex, pattern.length()))) {
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// Rest of pattern matches; return index at end of pattern
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return pattern.length() + prevIndex;
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}
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// Not a match; continue with normal search
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}
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// Did not find pattern in last block; see if entire pattern is inside this block
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int index = block.indexOf(pattern);
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if (index >= 0) {
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// Found pattern; return index at end of the pattern
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return index + pattern.length();
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}
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// Block does not contain the entire pattern, but see if the end of the block
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// contains the start of pattern. To do that, we see if block ends with the
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// first n-1 characters of pattern, the first n-2 characters of pattern, etc.
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for (index = block.length() - pattern.length() + 1; index < block.length(); index++) {
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// Using index as a start, see if the rest of block contains the start of pattern
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if (block.charAt(index) == pattern.charAt(0) &&
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block.endsWith(pattern.substring(0, block.length() - index))) {
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// Found partial match; return -(number of characters matched),
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// i.e. -1 for 1 character matched, -2 for 2 characters matched, etc.
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return index - block.length();
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}
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}
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return 0;
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}
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// Copy the content of reader to ping;
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// copying stops when endPattern is found in the input stream
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private static int fillPingBlock(OutputStream ping,
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Reader reader, String endPattern)
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throws IOException {
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int total = 0;
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int endIndex = 0;
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char [] block = new char[TRACES_BLOCK_SIZE];
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for (int size = reader.read(block); size >= 0; size = reader.read(block)) {
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String stringBlock = new String(block, 0, size);
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endIndex = getEndPatternIndex(stringBlock, endPattern, endIndex);
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if (endIndex > 0) {
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// Found end pattern; clip the string
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stringBlock = stringBlock.substring(0, endIndex);
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}
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String quoted = JSONObject.quote(stringBlock);
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total += writePingPayload(ping, quoted.substring(1, quoted.length() - 1));
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if (endIndex > 0) {
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// End pattern already found; return now
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break;
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}
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}
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return total;
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}
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private static void fillPingFooter(OutputStream ping,
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boolean haveNativeStack)
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throws IOException {
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// We are at the end of ANR data
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int total = writePingPayload(ping, ("\"," +
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"\"androidLogcat\":\""));
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try {
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// get the last 200 lines of logcat
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Process proc = (new ProcessBuilder())
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.command("/system/bin/logcat", "-v", "threadtime", "-t", "200", "-d", "*:D")
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.redirectErrorStream(true)
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.start();
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try {
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Reader procOut = new InputStreamReader(proc.getInputStream(), TRACES_CHARSET);
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int size = fillPingBlock(ping, procOut, null);
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if (DEBUG) {
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Log.d(LOGTAG, "wrote logcat, size = " + String.valueOf(size));
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}
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} finally {
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proc.destroy();
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}
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} catch (IOException e) {
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// ignore because logcat is not essential
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Log.w(LOGTAG, e);
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}
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if (haveNativeStack) {
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total += writePingPayload(ping, ("\"," +
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"\"androidNativeStack\":"));
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String nativeStack = String.valueOf(getNativeStack());
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int size = writePingPayload(ping, nativeStack);
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if (DEBUG) {
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Log.d(LOGTAG, "wrote native stack, size = " + String.valueOf(size));
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}
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total += size + writePingPayload(ping, "}");
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} else {
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total += writePingPayload(ping, "\"}");
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}
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byte [] data = (
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"}").getBytes(PING_CHARSET);
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ping.write(data);
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if (DEBUG) {
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Log.d(LOGTAG, "wrote ping footer, size = " + String.valueOf(data.length + total));
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}
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}
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private static void processTraces(Reader traces, File pingFile) {
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// Unwinding is memory intensive; only unwind if we have enough memory
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boolean haveNativeStack = requestNativeStack(
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/* unwind */ SysInfo.getMemSize() >= 640);
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try {
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OutputStream ping = new BufferedOutputStream(
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new FileOutputStream(pingFile), TRACES_BLOCK_SIZE);
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try {
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fillPingHeader(ping, pingFile.getName());
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// Traces file has the format
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// ----- pid xxx at xxx -----
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// Cmd line: org.mozilla.xxx
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// * stack trace *
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// ----- end xxx -----
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// ----- pid xxx at xxx -----
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// Cmd line: com.android.xxx
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// * stack trace *
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// ...
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// If we end the stack dump at the first end marker,
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// only Fennec stacks will be dumped
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int size = fillPingBlock(ping, traces, "\n----- end");
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if (DEBUG) {
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Log.d(LOGTAG, "wrote traces, size = " + String.valueOf(size));
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}
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fillPingFooter(ping, haveNativeStack);
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if (DEBUG) {
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Log.d(LOGTAG, "finished creating ping file");
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}
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return;
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} finally {
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ping.close();
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if (haveNativeStack) {
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releaseNativeStack();
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}
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}
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} catch (IOException e) {
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Log.w(LOGTAG, e);
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}
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// exception; delete ping file
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if (pingFile.exists()) {
|
|
pingFile.delete();
|
|
}
|
|
}
|
|
|
|
private static void processTraces(File tracesFile, File pingFile) {
|
|
try {
|
|
Reader traces = new InputStreamReader(
|
|
new FileInputStream(tracesFile), TRACES_CHARSET);
|
|
try {
|
|
processTraces(traces, pingFile);
|
|
} finally {
|
|
traces.close();
|
|
}
|
|
} catch (IOException e) {
|
|
Log.w(LOGTAG, e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onReceive(Context context, Intent intent) {
|
|
if (mPendingANR) {
|
|
// we already processed an ANR without getting unstuck; skip this one
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "skipping duplicate ANR");
|
|
}
|
|
return;
|
|
}
|
|
if (ThreadUtils.getUiHandler() != null) {
|
|
mPendingANR = true;
|
|
// detect when the main thread gets unstuck
|
|
ThreadUtils.postToUiThread(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
// okay to reset mPendingANR on main thread
|
|
mPendingANR = false;
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "yay we got unstuck!");
|
|
}
|
|
}
|
|
});
|
|
}
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "receiving " + String.valueOf(intent));
|
|
}
|
|
if (!ANR_ACTION.equals(intent.getAction())) {
|
|
return;
|
|
}
|
|
|
|
// make sure we have a good save location first
|
|
File pingFile = getPingFile();
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "using ping file: " + String.valueOf(pingFile));
|
|
}
|
|
if (pingFile == null) {
|
|
return;
|
|
}
|
|
|
|
File tracesFile = getTracesFile();
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "using traces file: " + String.valueOf(tracesFile));
|
|
}
|
|
if (tracesFile == null) {
|
|
return;
|
|
}
|
|
|
|
// We get ANR intents from all ANRs in the system, but we only want Gecko ANRs
|
|
if (!isGeckoTraces(context.getPackageName(), tracesFile)) {
|
|
if (DEBUG) {
|
|
Log.d(LOGTAG, "traces is not Gecko ANR");
|
|
}
|
|
return;
|
|
}
|
|
Log.i(LOGTAG, "processing Gecko ANR");
|
|
processTraces(tracesFile, pingFile);
|
|
}
|
|
}
|