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am 05db19bc: Merge "trigger kernel blocked stack trace on system server watchdog" into jb-mr1.1-dev

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* commit '05db19bc55962374812775bf7d980d83ca4f6c3e':
  trigger kernel blocked stack trace on system server watchdog
This commit is contained in:
Colin Cross
2012-11-29 12:49:46 -08:00
committed by Android Git Automerger
parent ed8c323a6c 05db19bc55
commit 418af9323f
1 changed files with 12 additions and 0 deletions
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12
services/java/com/android/server/Watchdog.java
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@ -39,6 +39,8 @@ import android.util.Log;
import android.util.Slog;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Calendar;
@ -439,6 +441,16 @@ public class Watchdog extends Thread {
dumpKernelStackTraces();
}
// Trigger the kernel to dump all blocked threads to the kernel log
try {
FileWriter sysrq_trigger = new FileWriter("/proc/sysrq-trigger");
sysrq_trigger.write("w");
sysrq_trigger.close();
} catch (IOException e) {
Slog.e(TAG, "Failed to write to /proc/sysrq-trigger");
Slog.e(TAG, e.getMessage());
}
// Try to add the error to the dropbox, but assuming that the ActivityManager
// itself may be deadlocked. (which has happened, causing this statement to
// deadlock and the watchdog as a whole to be ineffective)