MonoDroid - SIGSEGV when checking Dalvik vs ART

Question

I'm using the below code to determine whether the user has changed the runtime to ART (which Xamarin currently doesn't support and causes my app to crash).

private bool IsART {
        get {
            try {
                var systemProperties = Java.Lang.Class.ForName("android.os.SystemProperties");

                var strClass = Java.Lang.Class.FromType(typeof (Java.Lang.String));

                Method get = systemProperties.GetMethod("get", strClass, strClass);

                string value = get.Invoke(systemProperties, "persist.sys.dalvik.vm.lib", "Dalvik").ToString();

                if ("libart.so".Equals(value) || "libartd.so".Equals(value)) {
                    return true;
                }
            }
            catch {}

            return false;
        }
    }

Which works fine on my test device (HTC One X) but when run on a Nexus 5 with ART enabled, causes a SIGSEGV error with the following stack trace (which the try-catch doesn't catch):

03-18 19:39:30.045 E/mono-rt (26924):   at <unknown> <0xffffffff>
03-18 19:39:30.045 E/mono-rt (26924):   at (wrapper managed-to-native) object.wrapper_native_0x415b0f9d (intptr,intptr,intptr,Android.Runtime.JValue[]) <0xffffffff>
03-18 19:39:30.045 E/mono-rt (26924):   at (wrapper delegate-invoke) <Module>.invoke_intptr__this___intptr_intptr_intptr_JValue[] (intptr,intptr,intptr,Android.Runtime.JValue[]) <0xffffffff>
03-18 19:39:30.045 E/mono-rt (26924):   at Android.Runtime.JNIEnv.CallStaticObjectMethod (intptr,intptr,Android.Runtime.JValue[]) <0x00097>
03-18 19:39:30.045 E/mono-rt (26924):   at Java.Lang.Class.ForName (string) <0x000ef>
03-18 19:39:30.045 E/mono-rt (26924):   at AwesomeApp.Droid.SplashScreen.get_IsART () <0x0001b>

Can you try this implementation for detecting ART runtime? - http://stackoverflow.com/questions/22017813/how-can-i-detect-the-android-runtime-dalvik-or-art-in-xamarin — choper, Mar 19 '14 at 13:19
The code is pretty similar already! The exception occurs in `Java.Lang.Class.ForName` which is present in both implementations. — Jamie, Mar 19 '14 at 15:15
When you call this method? I mean in activity OnCreate or in another one? — choper, Mar 19 '14 at 15:36

score 0 · Accepted Answer · answered May 07 '14 at 13:42

0

As of Xamarin.Android 4.12.3, ART is officially supported so the error no longer occurs.

answered May 07 '14 at 13:42

Jamie

4,670
5
35
49

MonoDroid - SIGSEGV when checking Dalvik vs ART

1 Answers1