Implemented native functions and types for blastula management.
This patch adds native support for spawning and managing blastula pools,
as well as several code cleanups and modernizations.
Changes includes:
* A function to fork blastulas
* A table for managing blastula-related data
* Functions for adding and removing blastula data from the
aforementioned table
* Switching from NULL to nullptr
* Replacing string-passing error handling with a curried failure
function
* Utility functions for handling managed objects
* JNI functions for blastula pool management
Topic: zygot-prefork
Test: make & flash & launch apps & check log for messages
Bug: 68253328
Change-Id: I12cd9f2c87a2e3c00d64b683edf3631e29a51551
Merged-In: I12cd9f2c87a2e3c00d64b683edf3631e29a51551
diff --git a/core/java/com/android/internal/os/Zygote.java b/core/java/com/android/internal/os/Zygote.java
index 8b3829b3..6e14558 100644
--- a/core/java/com/android/internal/os/Zygote.java
+++ b/core/java/com/android/internal/os/Zygote.java
@@ -94,7 +94,7 @@
private Zygote() {}
/** Called for some security initialization before any fork. */
- native static void nativeSecurityInit();
+ static native void nativeSecurityInit();
/**
* Forks a new VM instance. The current VM must have been started
@@ -131,14 +131,14 @@
* if this is the parent, or -1 on error.
*/
public static int forkAndSpecialize(int uid, int gid, int[] gids, int runtimeFlags,
- int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose,
- int[] fdsToIgnore, boolean startChildZygote, String instructionSet, String appDataDir) {
+ int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose,
+ int[] fdsToIgnore, boolean startChildZygote, String instructionSet, String appDataDir) {
VM_HOOKS.preFork();
// Resets nice priority for zygote process.
resetNicePriority();
int pid = nativeForkAndSpecialize(
- uid, gid, gids, runtimeFlags, rlimits, mountExternal, seInfo, niceName, fdsToClose,
- fdsToIgnore, startChildZygote, instructionSet, appDataDir);
+ uid, gid, gids, runtimeFlags, rlimits, mountExternal, seInfo, niceName, fdsToClose,
+ fdsToIgnore, startChildZygote, instructionSet, appDataDir);
// Enable tracing as soon as possible for the child process.
if (pid == 0) {
Trace.setTracingEnabled(true, runtimeFlags);
@@ -150,14 +150,19 @@
return pid;
}
- native private static int nativeForkAndSpecialize(int uid, int gid, int[] gids,int runtimeFlags,
- int[][] rlimits, int mountExternal, String seInfo, String niceName, int[] fdsToClose,
- int[] fdsToIgnore, boolean startChildZygote, String instructionSet, String appDataDir);
+ private static native int nativeForkAndSpecialize(int uid, int gid, int[] gids,
+ int runtimeFlags, int[][] rlimits, int mountExternal, String seInfo, String niceName,
+ int[] fdsToClose, int[] fdsToIgnore, boolean startChildZygote, String instructionSet,
+ String appDataDir);
+
+ private static native void nativeSpecializeBlastula(int uid, int gid, int[] gids,
+ int runtimeFlags, int[][] rlimits, int mountExternal, String seInfo, String niceName,
+ boolean startChildZygote, String instructionSet, String appDataDir);
/**
* Called to do any initialization before starting an application.
*/
- native static void nativePreApplicationInit();
+ static native void nativePreApplicationInit();
/**
* Special method to start the system server process. In addition to the
@@ -188,7 +193,8 @@
// Resets nice priority for zygote process.
resetNicePriority();
int pid = nativeForkSystemServer(
- uid, gid, gids, runtimeFlags, rlimits, permittedCapabilities, effectiveCapabilities);
+ uid, gid, gids, runtimeFlags, rlimits,
+ permittedCapabilities, effectiveCapabilities);
// Enable tracing as soon as we enter the system_server.
if (pid == 0) {
Trace.setTracingEnabled(true, runtimeFlags);
@@ -197,19 +203,34 @@
return pid;
}
- native private static int nativeForkSystemServer(int uid, int gid, int[] gids, int runtimeFlags,
+ private static native int nativeForkSystemServer(int uid, int gid, int[] gids, int runtimeFlags,
int[][] rlimits, long permittedCapabilities, long effectiveCapabilities);
/**
* Lets children of the zygote inherit open file descriptors to this path.
*/
- native protected static void nativeAllowFileAcrossFork(String path);
+ protected static native void nativeAllowFileAcrossFork(String path);
/**
* Zygote unmount storage space on initializing.
* This method is called once.
*/
- native protected static void nativeUnmountStorageOnInit();
+ protected static native void nativeUnmountStorageOnInit();
+
+ protected static native void nativeGetSocketFDs(boolean isPrimary);
+
+ private static native int nativeGetBlastulaPoolCount();
+
+ private static native int nativeGetBlastulaPoolEventFD();
+
+ private static native int nativeForkBlastula(int readPipeFD,
+ int writePipeFD,
+ int[] sessionSocketRawFDs);
+
+ private static native int[] nativeGetBlastulaPipeFDs();
+
+ private static native boolean nativeRemoveBlastulaTableEntry(int blastulaPID);
+
private static void callPostForkSystemServerHooks() {
// SystemServer specific post fork hooks run before child post fork hooks.