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Block profiling signals in the Android UI thread

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* java/org/gnu/emacs/EmacsNative.java (EmacsNative): New
function `setupSystemThread'.
* java/org/gnu/emacs/EmacsService.java (onCreate): Block all
signals except for SIGBUS and SIGSEGV in the UI thread.
* src/android.c (setupSystemThread): New function.
This commit is contained in:
Po Lu 2023-06-09 14:03:50 +08:00
parent 7f073df533
commit c321eea5af
3 changed files with 53 additions and 0 deletions
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4
java/org/gnu/emacs/EmacsNative.java
View file

@ -188,6 +188,10 @@ public final class EmacsNative
KEYCODE_VOLUME_MUTE should be forwarded to Emacs. */
public static native boolean shouldForwardMultimediaButtons ();
/* Initialize the current thread, by blocking signals that do not
interest it. */
public static native void setupSystemThread ();
/* Input connection functions. These mostly correspond to their

25
java/org/gnu/emacs/EmacsService.java
View file

@ -25,6 +25,7 @@ import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;
import android.graphics.Matrix;
@ -211,6 +212,7 @@ public final class EmacsService extends Service
final String filesDir, libDir, cacheDir, classPath;
final double pixelDensityX;
final double pixelDensityY;
final Semaphore signalSemaphore;
SERVICE = this;
handler = new Handler (Looper.getMainLooper ());
@ -220,6 +222,7 @@ public final class EmacsService extends Service
pixelDensityX = metrics.xdpi;
pixelDensityY = metrics.ydpi;
resolver = getContentResolver ();
signalSemaphore = new Semaphore (0);
try
{
@ -248,11 +251,33 @@ public final class EmacsService extends Service
cacheDir, (float) pixelDensityX,
(float) pixelDensityY,
classPath, EmacsService.this);
/* Wait for the signal mask to be set up in the UI
thread. */
while (true)
{
try
{
signalSemaphore.acquire ();
break;
}
catch (InterruptedException e)
{
;;
}
}
}
}, extraStartupArgument,
/* If any file needs to be opened, open it now. */
EmacsOpenActivity.fileToOpen);
thread.start ();
/* Now that the thread has been started, block signals which
don't interest the current thread. */
EmacsNative.setupSystemThread ();
signalSemaphore.release ();
}
catch (IOException exception)
{