Android/frameworks_base
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Merge "Move preloaded-classes out of framework.jar." into lmp-mr1-dev

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This commit is contained in:
Ying Wang
2014-11-17 18:14:04 +00:00
committed by Android (Google) Code Review
parent 8c8d8b1012 0de36e51c5
commit 867a0de0b4
2 changed files with 80 additions and 79 deletions
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3
Android.mk
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@@ -402,9 +402,6 @@ LOCAL_DX_FLAGS := --core-library --multi-dex
LOCAL_RMTYPEDEFS := true
# List of classes and interfaces which should be loaded by the Zygote.
LOCAL_JAVA_RESOURCE_FILES += $(LOCAL_PATH)/preloaded-classes
include $(BUILD_JAVA_LIBRARY)
framework_module := $(LOCAL_INSTALLED_MODULE)

156
core/java/com/android/internal/os/ZygoteInit.java
View File

@@ -45,6 +45,8 @@ import libcore.io.IoUtils;
import java.io.BufferedReader;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
@@ -97,9 +99,9 @@ public class ZygoteInit {
static final int GC_LOOP_COUNT = 10;
/**
* The name of a resource file that contains classes to preload.
* The path of a file that contains classes to preload.
*/
private static final String PRELOADED_CLASSES = "preloaded-classes";
private static final String PRELOADED_CLASSES = "/system/etc/preloaded-classes";
/** Controls whether we should preload resources during zygote init. */
private static final boolean PRELOAD_RESOURCES = true;
@@ -284,90 +286,92 @@ public class ZygoteInit {
private static void preloadClasses() {
final VMRuntime runtime = VMRuntime.getRuntime();
InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream(
PRELOADED_CLASSES);
if (is == null) {
InputStream is;
try {
is = new FileInputStream(PRELOADED_CLASSES);
} catch (FileNotFoundException e) {
Log.e(TAG, "Couldn't find " + PRELOADED_CLASSES + ".");
} else {
Log.i(TAG, "Preloading classes...");
long startTime = SystemClock.uptimeMillis();
return;
}
// Drop root perms while running static initializers.
setEffectiveGroup(UNPRIVILEGED_GID);
setEffectiveUser(UNPRIVILEGED_UID);
Log.i(TAG, "Preloading classes...");
long startTime = SystemClock.uptimeMillis();
// Alter the target heap utilization. With explicit GCs this
// is not likely to have any effect.
float defaultUtilization = runtime.getTargetHeapUtilization();
runtime.setTargetHeapUtilization(0.8f);
// Drop root perms while running static initializers.
setEffectiveGroup(UNPRIVILEGED_GID);
setEffectiveUser(UNPRIVILEGED_UID);
// Start with a clean slate.
System.gc();
runtime.runFinalizationSync();
Debug.startAllocCounting();
// Alter the target heap utilization. With explicit GCs this
// is not likely to have any effect.
float defaultUtilization = runtime.getTargetHeapUtilization();
runtime.setTargetHeapUtilization(0.8f);
try {
BufferedReader br
= new BufferedReader(new InputStreamReader(is), 256);
// Start with a clean slate.
System.gc();
runtime.runFinalizationSync();
Debug.startAllocCounting();
int count = 0;
String line;
while ((line = br.readLine()) != null) {
// Skip comments and blank lines.
line = line.trim();
if (line.startsWith("#") || line.equals("")) {
continue;
}
try {
BufferedReader br
= new BufferedReader(new InputStreamReader(is), 256);
try {
if (false) {
Log.v(TAG, "Preloading " + line + "...");
}
Class.forName(line);
if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) {
if (false) {
Log.v(TAG,
" GC at " + Debug.getGlobalAllocSize());
}
System.gc();
runtime.runFinalizationSync();
Debug.resetGlobalAllocSize();
}
count++;
} catch (ClassNotFoundException e) {
Log.w(TAG, "Class not found for preloading: " + line);
} catch (UnsatisfiedLinkError e) {
Log.w(TAG, "Problem preloading " + line + ": " + e);
} catch (Throwable t) {
Log.e(TAG, "Error preloading " + line + ".", t);
if (t instanceof Error) {
throw (Error) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
throw new RuntimeException(t);
}
int count = 0;
String line;
while ((line = br.readLine()) != null) {
// Skip comments and blank lines.
line = line.trim();
if (line.startsWith("#") || line.equals("")) {
continue;
}
Log.i(TAG, "...preloaded " + count + " classes in "
+ (SystemClock.uptimeMillis()-startTime) + "ms.");
} catch (IOException e) {
Log.e(TAG, "Error reading " + PRELOADED_CLASSES + ".", e);
} finally {
IoUtils.closeQuietly(is);
// Restore default.
runtime.setTargetHeapUtilization(defaultUtilization);
// Fill in dex caches with classes, fields, and methods brought in by preloading.
runtime.preloadDexCaches();
Debug.stopAllocCounting();
// Bring back root. We'll need it later.
setEffectiveUser(ROOT_UID);
setEffectiveGroup(ROOT_GID);
try {
if (false) {
Log.v(TAG, "Preloading " + line + "...");
}
Class.forName(line);
if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) {
if (false) {
Log.v(TAG,
" GC at " + Debug.getGlobalAllocSize());
}
System.gc();
runtime.runFinalizationSync();
Debug.resetGlobalAllocSize();
}
count++;
} catch (ClassNotFoundException e) {
Log.w(TAG, "Class not found for preloading: " + line);
} catch (UnsatisfiedLinkError e) {
Log.w(TAG, "Problem preloading " + line + ": " + e);
} catch (Throwable t) {
Log.e(TAG, "Error preloading " + line + ".", t);
if (t instanceof Error) {
throw (Error) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
throw new RuntimeException(t);
}
}
Log.i(TAG, "...preloaded " + count + " classes in "
+ (SystemClock.uptimeMillis()-startTime) + "ms.");
} catch (IOException e) {
Log.e(TAG, "Error reading " + PRELOADED_CLASSES + ".", e);
} finally {
IoUtils.closeQuietly(is);
// Restore default.
runtime.setTargetHeapUtilization(defaultUtilization);
// Fill in dex caches with classes, fields, and methods brought in by preloading.
runtime.preloadDexCaches();
Debug.stopAllocCounting();
// Bring back root. We'll need it later.
setEffectiveUser(ROOT_UID);
setEffectiveGroup(ROOT_GID);
}
}