From 87c291421544821fe9d10a08ee4e9f31b62d5052 Mon Sep 17 00:00:00 2001
From: Satoshi Kataoka <satok@google.com>
Date: Wed, 31 Jul 2013 23:11:54 +0900
Subject: [PATCH] Add a debug utility for InputMethodUtils

Change-Id: I59f6001bf20640e36e19b09cf117b8579120ba7d
---
 .../inputmethod/InputMethodUtils.java         | 22 +++++++++++++++++++
 .../server/InputMethodManagerService.java     |  3 ++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/core/java/com/android/internal/inputmethod/InputMethodUtils.java b/core/java/com/android/internal/inputmethod/InputMethodUtils.java
index 7b4352e66f3ff..c7b5697f55af8 100644
--- a/core/java/com/android/internal/inputmethod/InputMethodUtils.java
+++ b/core/java/com/android/internal/inputmethod/InputMethodUtils.java
@@ -72,6 +72,28 @@ public class InputMethodUtils {
         }
         return sb.toString();
     }
+
+    public static String getApiCallStack() {
+        String apiCallStack = "";
+        try {
+            throw new RuntimeException();
+        } catch (RuntimeException e) {
+            final StackTraceElement[] frames = e.getStackTrace();
+            for (int j = 1; j < frames.length; ++j) {
+                final String tempCallStack = frames[j].toString();
+                if (TextUtils.isEmpty(apiCallStack)) {
+                    // Overwrite apiCallStack if it's empty
+                    apiCallStack = tempCallStack;
+                } else if (tempCallStack.indexOf("Transact(") < 0) {
+                    // Overwrite apiCallStack if it's not a binder call
+                    apiCallStack = tempCallStack;
+                } else {
+                    break;
+                }
+            }
+        }
+        return apiCallStack;
+    }
     // ----------------------------------------------------------------------
 
     public static boolean isSystemIme(InputMethodInfo inputMethod) {
diff --git a/services/java/com/android/server/InputMethodManagerService.java b/services/java/com/android/server/InputMethodManagerService.java
index 8200a690e0dba..da584e2012b4d 100644
--- a/services/java/com/android/server/InputMethodManagerService.java
+++ b/services/java/com/android/server/InputMethodManagerService.java
@@ -899,7 +899,8 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
             Slog.d(TAG, "--- calledFromForegroundUserOrSystemProcess ? "
                     + "calling uid = " + uid + " system uid = " + Process.SYSTEM_UID
                     + " calling userId = " + userId + ", foreground user id = "
-                    + mSettings.getCurrentUserId() + ", calling pid = " + Binder.getCallingPid());
+                    + mSettings.getCurrentUserId() + ", calling pid = " + Binder.getCallingPid()
+                    + InputMethodUtils.getApiCallStack());
         }
         if (uid == Process.SYSTEM_UID || userId == mSettings.getCurrentUserId()) {
             return true;