Make zygotes aware of their supported ABIs. (c41638cb) · Commits · e / os / android_frameworks_base

cmds/app_process/app_main.cpp

+19 −1

Original line number	Diff line number	Diff line
		@@ -10,8 +10,9 @@
		#include <binder/IPCThreadState.h>
		#include <binder/ProcessState.h>
		#include <utils/Log.h>
		#include <cutils/process_name.h>
		#include <cutils/memory.h>
		#include <cutils/process_name.h>
		#include <cutils/properties.h>
		#include <cutils/trace.h>
		#include <android_runtime/AndroidRuntime.h>

		@@ -135,6 +136,12 @@ static size_t computeArgBlockSize(int argc, char* const argv[]) {
		return (end - start);
		}

		#if defined(__LP64__)
		static const char ABI_LIST_PROPERTY[] = "ro.product.cpu.abilist64";
		#else
		static const char ABI_LIST_PROPERTY[] = "ro.product.cpu.abilist32";
		#endif

		int main(int argc, char* const argv[])
		{
		AppRuntime runtime(argv[0], computeArgBlockSize(argc, argv));
		@@ -205,6 +212,17 @@ int main(int argc, char* const argv[])
		args.add(String8("start-system-server"));
		}

		char prop[PROP_VALUE_MAX];
		if (property_get(ABI_LIST_PROPERTY, prop, NULL) == 0) {
		LOG_ALWAYS_FATAL("app_process: Unable to deterimine ABI list from property %s.",
		ABI_LIST_PROPERTY);
		return 11;
		}

		String8 abiFlag("--abi-list=");
		abiFlag.append(prop);
		args.add(abiFlag);

		// In zygote mode, pass all remaining arguments to the zygote
		// main() method.
		for (; i < argc; ++i) {

core/java/com/android/internal/os/ZygoteConnection.java

+31 −43

Original line number	Diff line number	Diff line
		@@ -22,9 +22,7 @@ import android.os.Process;
		import android.os.SELinux;
		import android.os.SystemProperties;
		import android.util.Log;

		import dalvik.system.PathClassLoader;

		import java.io.BufferedReader;
		import java.io.DataInputStream;
		import java.io.DataOutputStream;
		@@ -34,8 +32,8 @@ import java.io.FileOutputStream;
		import java.io.IOException;
		import java.io.InputStreamReader;
		import java.io.PrintStream;
		import java.nio.charset.StandardCharsets;
		import java.util.ArrayList;

		import libcore.io.ErrnoException;
		import libcore.io.IoUtils;
		import libcore.io.Libcore;
		@@ -73,15 +71,18 @@ class ZygoteConnection {
		private final BufferedReader mSocketReader;
		private final Credentials peer;
		private final String peerSecurityContext;
		private final String abiList;

		/**
		* Constructs instance from connected socket.
		*
		* @param socket non-null; connected socket
		* @param abiList non-null; a list of ABIs this zygote supports.
		* @throws IOException
		*/
		ZygoteConnection(LocalSocket socket) throws IOException {
		ZygoteConnection(LocalSocket socket, String abiList) throws IOException {
		mSocket = socket;
		this.abiList = abiList;

		mSocketOutStream
		= new DataOutputStream(socket.getOutputStream());
		@@ -110,43 +111,6 @@ class ZygoteConnection {
		return mSocket.getFileDescriptor();
		}

		/**
		* Reads start commands from an open command socket.
		* Start commands are presently a pair of newline-delimited lines
		* indicating a) class to invoke main() on b) nice name to set argv[0] to.
		* Continues to read commands and forkAndSpecialize children until
		* the socket is closed. This method is used in ZYGOTE_FORK_MODE
		*
		* @throws ZygoteInit.MethodAndArgsCaller trampoline to invoke main()
		* method in child process
		*/
		void run() throws ZygoteInit.MethodAndArgsCaller {

		int loopCount = ZygoteInit.GC_LOOP_COUNT;

		while (true) {
		/*
		* Call gc() before we block in readArgumentList().
		* It's work that has to be done anyway, and it's better
		* to avoid making every child do it. It will also
		* madvise() any free memory as a side-effect.
		*
		* Don't call it every time, because walking the entire
		* heap is a lot of overhead to free a few hundred bytes.
		*/
		if (loopCount <= 0) {
		ZygoteInit.gc();
		loopCount = ZygoteInit.GC_LOOP_COUNT;
		} else {
		loopCount--;
		}

		if (runOnce()) {
		break;
		}
		}
		}

		/**
		* Reads one start command from the command socket. If successful,
		* a child is forked and a {@link ZygoteInit.MethodAndArgsCaller}
		@@ -196,6 +160,11 @@ class ZygoteConnection {

		try {
		parsedArgs = new Arguments(args);

		if (parsedArgs.abiListQuery) {
		return handleAbiListQuery();
		}

		if (parsedArgs.permittedCapabilities != 0 \|\| parsedArgs.effectiveCapabilities != 0) {
		throw new ZygoteSecurityException("Client may not specify capabilities: " +
		"permitted=0x" + Long.toHexString(parsedArgs.permittedCapabilities) +
		@@ -287,6 +256,18 @@ class ZygoteConnection {
		}
		}

		private boolean handleAbiListQuery() {
		try {
		final byte[] abiListBytes = abiList.getBytes(StandardCharsets.US_ASCII);
		mSocketOutStream.writeInt(abiListBytes.length);
		mSocketOutStream.write(abiListBytes);
		return false;
		} catch (IOException ioe) {
		Log.e(TAG, "Error writing to command socket", ioe);
		return true;
		}
		}

		/**
		* Closes socket associated with this connection.
		*/
		@@ -387,6 +368,11 @@ class ZygoteConnection {
		*/
		String remainingArgs[];

		/**
		* Whether the current arguments constitute an ABI list query.
		*/
		boolean abiListQuery;

		/**
		* Constructs instance and parses args
		* @param args zygote command-line args
		@@ -540,6 +526,8 @@ class ZygoteConnection {
		mountExternal = Zygote.MOUNT_EXTERNAL_MULTIUSER;
		} else if (arg.equals("--mount-external-multiuser-all")) {
		mountExternal = Zygote.MOUNT_EXTERNAL_MULTIUSER_ALL;
		} else if (arg.equals("--query-abi-list")) {
		abiListQuery = true;
		} else {
		break;
		}
		@@ -975,7 +963,7 @@ class ZygoteConnection {
		mSocketOutStream.writeInt(pid);
		mSocketOutStream.writeBoolean(usingWrapper);
		} catch (IOException ex) {
		Log.e(TAG, "Error reading from command socket", ex);
		Log.e(TAG, "Error writing to command socket", ex);
		return true;
		}

core/java/com/android/internal/os/ZygoteInit.java

+34 −22

Original line number	Diff line number	Diff line
		@@ -64,7 +64,7 @@ public class ZygoteInit {

		private static final String PROPERTY_DISABLE_OPENGL_PRELOADING = "ro.zygote.disable_gl_preload";

		private static final String ANDROID_SOCKET_ENV = "ANDROID_SOCKET_zygote";
		private static final String ANDROID_SOCKET_PREFIX = "ANDROID_SOCKET_";

		private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020;
		private static final int LOG_BOOT_PROGRESS_PRELOAD_END = 3030;
		@@ -72,8 +72,9 @@ public class ZygoteInit {
		/** when preloading, GC after allocating this many bytes */
		private static final int PRELOAD_GC_THRESHOLD = 50000;

		public static final String USAGE_STRING =
		" <\"start-system-server\"\|\"\" for startSystemServer>";
		private static final String ABI_LIST_ARG = "--abi-list=";

		private static final String SOCKET_NAME_ARG = "--socket-name=";

		private static LocalServerSocket sServerSocket;

		@@ -150,15 +151,15 @@ public class ZygoteInit {
		*
		* @throws RuntimeException when open fails
		*/
		private static void registerZygoteSocket() {
		private static void registerZygoteSocket(String socketName) {
		if (sServerSocket == null) {
		int fileDesc;
		final String fullSocketName = ANDROID_SOCKET_PREFIX + socketName;
		try {
		String env = System.getenv(ANDROID_SOCKET_ENV);
		String env = System.getenv(fullSocketName);
		fileDesc = Integer.parseInt(env);
		} catch (RuntimeException ex) {
		throw new RuntimeException(
		ANDROID_SOCKET_ENV + " unset or invalid", ex);
		throw new RuntimeException(fullSocketName + " unset or invalid", ex);
		}

		try {
		@@ -175,9 +176,9 @@ public class ZygoteInit {
		* Waits for and accepts a single command connection. Throws
		* RuntimeException on failure.
		*/
		private static ZygoteConnection acceptCommandPeer() {
		private static ZygoteConnection acceptCommandPeer(String abiList) {
		try {
		return new ZygoteConnection(sServerSocket.accept());
		return new ZygoteConnection(sServerSocket.accept(), abiList);
		} catch (IOException ex) {
		throw new RuntimeException(
		"IOException during accept()", ex);
		@@ -567,7 +568,26 @@ public class ZygoteInit {
		// Start profiling the zygote initialization.
		SamplingProfilerIntegration.start();

		registerZygoteSocket();
		boolean startSystemServer = false;
		String socketName = "zygote";
		String abiList = null;
		for (int i = 1; i < argv.length; i++) {
		if ("start-system-server".equals(argv[i])) {
		startSystemServer = true;
		} else if (argv[i].startsWith(ABI_LIST_ARG)) {
		abiList = argv[i].substring(ABI_LIST_ARG.length());
		} else if (argv[i].startsWith(SOCKET_NAME_ARG)) {
		socketName = argv[i].substring(SOCKET_NAME_ARG.length());
		} else {
		throw new RuntimeException("Unknown command line argument: " + argv[i]);
		}
		}

		if (abiList == null) {
		throw new RuntimeException("No ABI list supplied.");
		}

		registerZygoteSocket(socketName);
		EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START,
		SystemClock.uptimeMillis());
		preload();
		@@ -584,20 +604,12 @@ public class ZygoteInit {
		// Zygote.
		Trace.setTracingEnabled(false);

		// If requested, start system server directly from Zygote
		if (argv.length != 2) {
		throw new RuntimeException(argv[0] + USAGE_STRING);
		}

		if (argv[1].equals("start-system-server")) {
		if (startSystemServer) {
		startSystemServer();
		} else if (!argv[1].equals("")) {
		throw new RuntimeException(argv[0] + USAGE_STRING);
		}

		Log.i(TAG, "Accepting command socket connections");

		runSelectLoop();
		runSelectLoop(abiList);

		closeServerSocket();
		} catch (MethodAndArgsCaller caller) {
		@@ -617,7 +629,7 @@ public class ZygoteInit {
		* @throws MethodAndArgsCaller in a child process when a main() should
		* be executed.
		*/
		private static void runSelectLoop() throws MethodAndArgsCaller {
		private static void runSelectLoop(String abiList) throws MethodAndArgsCaller {
		ArrayList<FileDescriptor> fds = new ArrayList<FileDescriptor>();
		ArrayList<ZygoteConnection> peers = new ArrayList<ZygoteConnection>();
		FileDescriptor[] fdArray = new FileDescriptor[4];
		@@ -656,7 +668,7 @@ public class ZygoteInit {
		if (index < 0) {
		throw new RuntimeException("Error in select()");
		} else if (index == 0) {
		ZygoteConnection newPeer = acceptCommandPeer();
		ZygoteConnection newPeer = acceptCommandPeer(abiList);
		peers.add(newPeer);
		fds.add(newPeer.getFileDesciptor());
		} else {