Merge "Code cleanup in ZygoteInit." am: 889648df40
am: 6b7e35d216
Change-Id: I654fcdb478dfae98d78b0353e068122d115dd2c5
diff --git a/core/java/com/android/internal/os/ZygoteInit.java b/core/java/com/android/internal/os/ZygoteInit.java
index 04034fb..37d0f3f 100644
--- a/core/java/com/android/internal/os/ZygoteInit.java
+++ b/core/java/com/android/internal/os/ZygoteInit.java
@@ -70,9 +70,8 @@
/**
* Startup class for the zygote process.
*
- * Pre-initializes some classes, and then waits for commands on a UNIX domain
- * socket. Based on these commands, forks off child processes that inherit
- * the initial state of the VM.
+ * Pre-initializes some classes, and then waits for commands on a UNIX domain socket. Based on these
+ * commands, forks off child processes that inherit the initial state of the VM.
*
* Please see {@link ZygoteConnection.Arguments} for documentation on the
* client protocol.
@@ -80,6 +79,8 @@
* @hide
*/
public class ZygoteInit {
+
+ // TODO (chriswailes): Change this so it is set with Zygote or ZygoteSecondary as appropriate
private static final String TAG = "Zygote";
private static final String PROPERTY_DISABLE_OPENGL_PRELOADING = "ro.zygote.disable_gl_preload";
@@ -88,11 +89,15 @@
private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020;
private static final int LOG_BOOT_PROGRESS_PRELOAD_END = 3030;
- /** when preloading, GC after allocating this many bytes */
+ /**
+ * when preloading, GC after allocating this many bytes
+ */
private static final int PRELOAD_GC_THRESHOLD = 50000;
private static final String ABI_LIST_ARG = "--abi-list=";
+ // TODO (chriswailes): Re-name this --zygote-socket-name= and then add a
+ // --blastula-socket-name parameter.
private static final String SOCKET_NAME_ARG = "--socket-name=";
/**
@@ -105,7 +110,9 @@
*/
private static final String PRELOADED_CLASSES = "/system/etc/preloaded-classes";
- /** Controls whether we should preload resources during zygote init. */
+ /**
+ * Controls whether we should preload resources during zygote init.
+ */
public static final boolean PRELOAD_RESOURCES = true;
private static final int UNPRIVILEGED_UID = 9999;
@@ -172,6 +179,7 @@
}
native private static void nativePreloadAppProcessHALs();
+
native private static void nativePreloadOpenGL();
private static void preloadOpenGL() {
@@ -190,8 +198,8 @@
/**
* Register AndroidKeyStoreProvider and warm up the providers that are already registered.
*
- * By doing it here we avoid that each app does it when requesting a service from the
- * provider for the first time.
+ * By doing it here we avoid that each app does it when requesting a service from the provider
+ * for the first time.
*/
private static void warmUpJcaProviders() {
long startTime = SystemClock.uptimeMillis();
@@ -217,11 +225,10 @@
}
/**
- * Performs Zygote process initialization. Loads and initializes
- * commonly used classes.
+ * Performs Zygote process initialization. Loads and initializes commonly used classes.
*
- * Most classes only cause a few hundred bytes to be allocated, but
- * a few will allocate a dozen Kbytes (in one case, 500+K).
+ * Most classes only cause a few hundred bytes to be allocated, but a few will allocate a dozen
+ * Kbytes (in one case, 500+K).
*/
private static void preloadClasses() {
final VMRuntime runtime = VMRuntime.getRuntime();
@@ -262,8 +269,8 @@
runtime.setTargetHeapUtilization(0.8f);
try {
- BufferedReader br
- = new BufferedReader(new InputStreamReader(is), 256);
+ BufferedReader br =
+ new BufferedReader(new InputStreamReader(is), 256);
int count = 0;
String line;
@@ -304,7 +311,7 @@
}
Log.i(TAG, "...preloaded " + count + " classes in "
- + (SystemClock.uptimeMillis()-startTime) + "ms.");
+ + (SystemClock.uptimeMillis() - startTime) + "ms.");
} catch (IOException e) {
Log.e(TAG, "Error reading " + PRELOADED_CLASSES + ".", e);
} finally {
@@ -330,11 +337,10 @@
}
/**
- * Load in commonly used resources, so they can be shared across
- * processes.
+ * Load in commonly used resources, so they can be shared across processes.
*
- * These tend to be a few Kbytes, but are frequently in the 20-40K
- * range, and occasionally even larger.
+ * These tend to be a few Kbytes, but are frequently in the 20-40K range, and occasionally even
+ * larger.
*/
private static void preloadResources() {
final VMRuntime runtime = VMRuntime.getRuntime();
@@ -351,7 +357,7 @@
int N = preloadDrawables(ar);
ar.recycle();
Log.i(TAG, "...preloaded " + N + " resources in "
- + (SystemClock.uptimeMillis()-startTime) + "ms.");
+ + (SystemClock.uptimeMillis() - startTime) + "ms.");
startTime = SystemClock.uptimeMillis();
ar = mResources.obtainTypedArray(
@@ -359,7 +365,7 @@
N = preloadColorStateLists(ar);
ar.recycle();
Log.i(TAG, "...preloaded " + N + " resources in "
- + (SystemClock.uptimeMillis()-startTime) + "ms.");
+ + (SystemClock.uptimeMillis() - startTime) + "ms.");
if (mResources.getBoolean(
com.android.internal.R.bool.config_freeformWindowManagement)) {
@@ -380,7 +386,7 @@
private static int preloadColorStateLists(TypedArray ar) {
int N = ar.length();
- for (int i=0; i<N; i++) {
+ for (int i = 0; i < N; i++) {
int id = ar.getResourceId(i, 0);
if (false) {
Log.v(TAG, "Preloading resource #" + Integer.toHexString(id));
@@ -389,8 +395,8 @@
if (mResources.getColorStateList(id, null) == null) {
throw new IllegalArgumentException(
"Unable to find preloaded color resource #0x"
- + Integer.toHexString(id)
- + " (" + ar.getString(i) + ")");
+ + Integer.toHexString(id)
+ + " (" + ar.getString(i) + ")");
}
}
}
@@ -400,7 +406,7 @@
private static int preloadDrawables(TypedArray ar) {
int N = ar.length();
- for (int i=0; i<N; i++) {
+ for (int i = 0; i < N; i++) {
int id = ar.getResourceId(i, 0);
if (false) {
Log.v(TAG, "Preloading resource #" + Integer.toHexString(id));
@@ -409,8 +415,8 @@
if (mResources.getDrawable(id, null) == null) {
throw new IllegalArgumentException(
"Unable to find preloaded drawable resource #0x"
- + Integer.toHexString(id)
- + " (" + ar.getString(i) + ")");
+ + Integer.toHexString(id)
+ + " (" + ar.getString(i) + ")");
}
}
}
@@ -418,9 +424,8 @@
}
/**
- * Runs several special GCs to try to clean up a few generations of
- * softly- and final-reachable objects, along with any other garbage.
- * This is only useful just before a fork().
+ * Runs several special GCs to try to clean up a few generations of softly- and final-reachable
+ * objects, along with any other garbage. This is only useful just before a fork().
*/
private static void gcAndFinalize() {
ZygoteHooks.gcAndFinalize();
@@ -482,16 +487,17 @@
/*
* Pass the remaining arguments to SystemServer.
*/
- return ZygoteInit.zygoteInit(parsedArgs.targetSdkVersion, parsedArgs.remainingArgs, cl);
+ return ZygoteInit.zygoteInit(parsedArgs.targetSdkVersion,
+ parsedArgs.remainingArgs, cl);
}
/* should never reach here */
}
/**
- * Note that preparing the profiles for system server does not require special
- * selinux permissions. From the installer perspective the system server is a regular package
- * which can capture profile information.
+ * Note that preparing the profiles for system server does not require special selinux
+ * permissions. From the installer perspective the system server is a regular package which can
+ * capture profile information.
*/
private static void prepareSystemServerProfile(String systemServerClasspath)
throws RemoteException {
@@ -543,8 +549,8 @@
}
/**
- * Performs dex-opt on the elements of {@code classPath}, if needed. We
- * choose the instruction set of the current runtime.
+ * Performs dex-opt on the elements of {@code classPath}, if needed. We choose the instruction
+ * set of the current runtime.
*/
private static void performSystemServerDexOpt(String classPath) {
final String[] classPathElements = classPath.split(":");
@@ -562,8 +568,9 @@
int dexoptNeeded;
try {
dexoptNeeded = DexFile.getDexOptNeeded(
- classPathElement, instructionSet, systemServerFilter,
- null /* classLoaderContext */, false /* newProfile */, false /* downgrade */);
+ classPathElement, instructionSet, systemServerFilter,
+ null /* classLoaderContext */, false /* newProfile */,
+ false /* downgrade */);
} catch (FileNotFoundException ignored) {
// Do not add to the classpath.
Log.w(TAG, "Missing classpath element for system server: " + classPathElement);
@@ -606,8 +613,8 @@
}
/**
- * Encodes the system server class loader context in a format that is accepted by dexopt.
- * This assumes the system server is always loaded with a {@link dalvik.system.PathClassLoader}.
+ * Encodes the system server class loader context in a format that is accepted by dexopt. This
+ * assumes the system server is always loaded with a {@link dalvik.system.PathClassLoader}.
*
* Note that ideally we would use the {@code DexoptUtils} to compute this. However we have no
* dependency here on the server so we hard code the logic again.
@@ -618,10 +625,11 @@
/**
* Encodes the class path in a format accepted by dexopt.
- * @param classPath the old class path (may be empty).
- * @param newElement the new class path elements
- * @return the class path encoding resulted from appending {@code newElement} to
- * {@code classPath}.
+ *
+ * @param classPath The old class path (may be empty).
+ * @param newElement The new class path elements
+ * @return The class path encoding resulted from appending {@code newElement} to {@code
+ * classPath}.
*/
private static String encodeSystemServerClassPath(String classPath, String newElement) {
return (classPath == null || classPath.isEmpty())
@@ -632,25 +640,25 @@
/**
* Prepare the arguments and forks for the system server process.
*
- * Returns an {@code Runnable} that provides an entrypoint into system_server code in the
- * child process, and {@code null} in the parent.
+ * @return A {@code Runnable} that provides an entrypoint into system_server code in the child
+ * process; {@code null} in the parent.
*/
private static Runnable forkSystemServer(String abiList, String socketName,
ZygoteServer zygoteServer) {
long capabilities = posixCapabilitiesAsBits(
- OsConstants.CAP_IPC_LOCK,
- OsConstants.CAP_KILL,
- OsConstants.CAP_NET_ADMIN,
- OsConstants.CAP_NET_BIND_SERVICE,
- OsConstants.CAP_NET_BROADCAST,
- OsConstants.CAP_NET_RAW,
- OsConstants.CAP_SYS_MODULE,
- OsConstants.CAP_SYS_NICE,
- OsConstants.CAP_SYS_PTRACE,
- OsConstants.CAP_SYS_TIME,
- OsConstants.CAP_SYS_TTY_CONFIG,
- OsConstants.CAP_WAKE_ALARM,
- OsConstants.CAP_BLOCK_SUSPEND
+ OsConstants.CAP_IPC_LOCK,
+ OsConstants.CAP_KILL,
+ OsConstants.CAP_NET_ADMIN,
+ OsConstants.CAP_NET_BIND_SERVICE,
+ OsConstants.CAP_NET_BROADCAST,
+ OsConstants.CAP_NET_RAW,
+ OsConstants.CAP_SYS_MODULE,
+ OsConstants.CAP_SYS_NICE,
+ OsConstants.CAP_SYS_PTRACE,
+ OsConstants.CAP_SYS_TIME,
+ OsConstants.CAP_SYS_TTY_CONFIG,
+ OsConstants.CAP_WAKE_ALARM,
+ OsConstants.CAP_BLOCK_SUSPEND
);
/* Containers run without some capabilities, so drop any caps that are not available. */
StructCapUserHeader header = new StructCapUserHeader(
@@ -665,14 +673,15 @@
/* Hardcoded command line to start the system server */
String args[] = {
- "--setuid=1000",
- "--setgid=1000",
- "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1018,1021,1023,1024,1032,1065,3001,3002,3003,3006,3007,3009,3010",
- "--capabilities=" + capabilities + "," + capabilities,
- "--nice-name=system_server",
- "--runtime-args",
- "--target-sdk-version=" + VMRuntime.SDK_VERSION_CUR_DEVELOPMENT,
- "com.android.server.SystemServer",
+ "--setuid=1000",
+ "--setgid=1000",
+ "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1018,1021,1023,"
+ + "1024,1032,1065,3001,3002,3003,3006,3007,3009,3010",
+ "--capabilities=" + capabilities + "," + capabilities,
+ "--nice-name=system_server",
+ "--runtime-args",
+ "--target-sdk-version=" + VMRuntime.SDK_VERSION_CUR_DEVELOPMENT,
+ "com.android.server.SystemServer",
};
ZygoteConnection.Arguments parsedArgs = null;
@@ -784,10 +793,10 @@
if (!enableLazyPreload) {
bootTimingsTraceLog.traceBegin("ZygotePreload");
EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START,
- SystemClock.uptimeMillis());
+ SystemClock.uptimeMillis());
preload(bootTimingsTraceLog);
EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_END,
- SystemClock.uptimeMillis());
+ SystemClock.uptimeMillis());
bootTimingsTraceLog.traceEnd(); // ZygotePreload
} else {
Zygote.resetNicePriority();
@@ -843,9 +852,8 @@
/**
* Return {@code true} if this device configuration has another zygote.
*
- * We determine this by comparing the device ABI list with this zygotes
- * list. If this zygote supports all ABIs this device supports, there won't
- * be another zygote.
+ * We determine this by comparing the device ABI list with this zygotes list. If this zygote
+ * supports all ABIs this device supports, there won't be another zygote.
*/
private static boolean hasSecondZygote(String abiList) {
return !SystemProperties.get("ro.product.cpu.abilist").equals(abiList);
@@ -868,9 +876,8 @@
}
/**
- * The main function called when started through the zygote process. This
- * could be unified with main(), if the native code in nativeFinishInit()
- * were rationalized with Zygote startup.<p>
+ * The main function called when started through the zygote process. This could be unified with
+ * main(), if the native code in nativeFinishInit() were rationalized with Zygote startup.<p>
*
* Current recognized args:
* <ul>
@@ -880,7 +887,8 @@
* @param targetSdkVersion target SDK version
* @param argv arg strings
*/
- public static final Runnable zygoteInit(int targetSdkVersion, String[] argv, ClassLoader classLoader) {
+ public static final Runnable zygoteInit(int targetSdkVersion, String[] argv,
+ ClassLoader classLoader) {
if (RuntimeInit.DEBUG) {
Slog.d(RuntimeInit.TAG, "RuntimeInit: Starting application from zygote");
}
@@ -894,9 +902,9 @@
}
/**
- * The main function called when starting a child zygote process. This is used as an
- * alternative to zygoteInit(), which skips calling into initialization routines that
- * start the Binder threadpool.
+ * The main function called when starting a child zygote process. This is used as an alternative
+ * to zygoteInit(), which skips calling into initialization routines that start the Binder
+ * threadpool.
*/
static final Runnable childZygoteInit(
int targetSdkVersion, String[] argv, ClassLoader classLoader) {