Add new debug feature to automatically create heap dumps.
Not yet working, unless you turn off SELinux enforcing.
We need to update SElinux to allow the system process
to give apps access to /data/system/heapdump/javaheap.bin.
Currently watching can only be enabled through the shell,
such as:
adb shell am set-watch-heap com.android.systemui 1024
The last number is the process pss size in bytes, so this is
asking us to warn if it goes about 1K which will be all the
time.
Change-Id: I2089e5db2927afca0bf01a363c6247ee5dcb26e8
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index 3197461..997f69d 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -2423,6 +2423,23 @@
reply.writeNoException();
return true;
}
+
+ case SET_DUMP_HEAP_DEBUG_LIMIT_TRANSACTION: {
+ data.enforceInterface(IActivityManager.descriptor);
+ String procName = data.readString();
+ long maxMemSize = data.readLong();
+ setDumpHeapDebugLimit(procName, maxMemSize);
+ reply.writeNoException();
+ return true;
+ }
+
+ case DUMP_HEAP_FINISHED_TRANSACTION: {
+ data.enforceInterface(IActivityManager.descriptor);
+ String path = data.readString();
+ dumpHeapFinished(path);
+ reply.writeNoException();
+ return true;
+ }
}
return super.onTransact(code, data, reply, flags);
@@ -5616,5 +5633,30 @@
reply.recycle();
}
+ @Override
+ public void setDumpHeapDebugLimit(String processName, long maxMemSize) throws RemoteException {
+ Parcel data = Parcel.obtain();
+ Parcel reply = Parcel.obtain();
+ data.writeInterfaceToken(IActivityManager.descriptor);
+ data.writeString(processName);
+ data.writeLong(maxMemSize);
+ mRemote.transact(SET_DUMP_HEAP_DEBUG_LIMIT_TRANSACTION, data, reply, 0);
+ reply.readException();
+ data.recycle();
+ reply.recycle();
+ }
+
+ @Override
+ public void dumpHeapFinished(String path) throws RemoteException {
+ Parcel data = Parcel.obtain();
+ Parcel reply = Parcel.obtain();
+ data.writeInterfaceToken(IActivityManager.descriptor);
+ data.writeString(path);
+ mRemote.transact(DUMP_HEAP_FINISHED_TRANSACTION, data, reply, 0);
+ reply.readException();
+ data.recycle();
+ reply.recycle();
+ }
+
private IBinder mRemote;
}