Use FastPrintWriter... everywhere.

One problem this turned up is, because FastPrintWriter does
its own buffering, a lot of code that used to use PrintWriter
would fail -- if it pointed to a StringWriter, there was no
buffering, so it could just immediately get the result.  Now
you need to first flush the FastPrintWriter.

Also added some new constructors to specify the size of buffer
that FastPrintWriter should use.

Change-Id: If48cd28d7be0b6b3278bbb69a8357e6ce88cf54a

2 files changed, 7 insertions, 3 deletions

diff --git a/core/java/android/os/Debug.java b/core/java/android/os/Debug.java
index 362ae29..c5f473e 100644
--- a/core/java/android/os/Debug.java
+++ b/core/java/android/os/Debug.java
@@ -16,6 +16,7 @@
 
 package android.os;
 
+import com.android.internal.util.FastPrintWriter;
 import com.android.internal.util.TypedProperties;
 
 import android.util.Log;
@@ -476,7 +477,7 @@ public final class Debug
         PrintWriter outStream = null;
         try {
             FileOutputStream fos = new FileOutputStream(SYSFS_QEMU_TRACE_STATE);
-            outStream = new PrintWriter(new OutputStreamWriter(fos));
+            outStream = new FastPrintWriter(fos);
             outStream.println("1");
         } catch (Exception e) {
         } finally {
@@ -504,7 +505,7 @@ public final class Debug
         PrintWriter outStream = null;
         try {
             FileOutputStream fos = new FileOutputStream(SYSFS_QEMU_TRACE_STATE);
-            outStream = new PrintWriter(new OutputStreamWriter(fos));
+            outStream = new FastPrintWriter(fos);
             outStream.println("0");
         } catch (Exception e) {
             // We could print an error message here but we probably want
diff --git a/core/java/android/os/StrictMode.java b/core/java/android/os/StrictMode.java
index a9abdc5..d794ca6 100644
--- a/core/java/android/os/StrictMode.java
+++ b/core/java/android/os/StrictMode.java
@@ -32,6 +32,7 @@ import android.view.IWindowManager;
 
 import com.android.internal.os.RuntimeInit;
 
+import com.android.internal.util.FastPrintWriter;
 import dalvik.system.BlockGuard;
 import dalvik.system.CloseGuard;
 import dalvik.system.VMDebug;
@@ -1700,7 +1701,9 @@ public final class StrictMode {
     /* package */ static void readAndHandleBinderCallViolations(Parcel p) {
         // Our own stack trace to append
         StringWriter sw = new StringWriter();
-        new LogStackTrace().printStackTrace(new PrintWriter(sw));
+        PrintWriter pw = new FastPrintWriter(sw, false, 256);
+        new LogStackTrace().printStackTrace(pw);
+        pw.flush();
         String ourStack = sw.toString();
 
         int policyMask = getThreadPolicyMask();