Use exceptionCheck after VMRuntime.newNonMovableArray/addressOf.

Since VMRuntime.newNonMovableArray and VMRuntime.addressOf are java
methods implemented in Native, they don't necessarily return NULL
when an exception is thrown. Checking the exception instead of the
return value fixes errors which may occur if the runtime returns
garbage when an exception is pending.

Bug: 11971220
Change-Id: I70478834c9f14cc5d9e666e1e174d3fd09269719

1 files changed, 13 insertions, 9 deletions

diff --git a/core/jni/android/graphics/Graphics.cpp b/core/jni/android/graphics/Graphics.cpp
index 0a8eeab..38a9ba3 100644
--- a/core/jni/android/graphics/Graphics.cpp
+++ b/core/jni/android/graphics/Graphics.cpp
@@ -547,16 +547,20 @@ jbyteArray GraphicsJNI::allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
     jbyteArray arrayObj = (jbyteArray) env->CallObjectMethod(gVMRuntime,
                                                              gVMRuntime_newNonMovableArray,
                                                              gByte_class, size);
-    if (arrayObj) {
-        jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
-        if (addr) {
-            SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable);
-            bitmap->setPixelRef(pr)->unref();
-            // since we're already allocated, we lockPixels right away
-            // HeapAllocator behaves this way too
-            bitmap->lockPixels();
-        }
+    if (env->ExceptionCheck() != 0) {
+        return NULL;
+    }
+    SkASSERT(arrayObj);
+    jbyte* addr = (jbyte*) env->CallLongMethod(gVMRuntime, gVMRuntime_addressOf, arrayObj);
+    if (env->ExceptionCheck() != 0) {
+        return NULL;
     }
+    SkASSERT(addr);
+    SkPixelRef* pr = new AndroidPixelRef(env, (void*) addr, size, arrayObj, ctable);
+    bitmap->setPixelRef(pr)->unref();
+    // since we're already allocated, we lockPixels right away
+    // HeapAllocator behaves this way too
+    bitmap->lockPixels();
 
     return arrayObj;
 }