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Unable to make JNI call from c++ to java in android lollipop using jni #649

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
Hi,

I am making a library app which detects native crashes in android using
google breakpad. Whenever my main app has a native crash, breakpad invokes
the following callback. From this callback, I need to call a static void
method in a java class using JNI.

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*bool breakpad_callback(const google_breakpad::MinidumpDescriptor& descriptor, 
void* context, bool succeeded) {

JNIEnv* env = NULL;

if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK)
{
     if(isDebug)
         LOGI("Failed to get the environment");
     return false;
}

if(isDebug)
     LOGI("attaching thread ...");
vm->AttachCurrentThread(&env, NULL);

if(isDebug)
     LOGI("handle exception");

  ExceptionHandlerClass = (jclass)env->NewGlobalRef(env->FindClass("com/abc/Myclass"));
         if (ExceptionHandlerClass == NULL)
             LOGE("Could not find java class");

  ExceptionHandlerMethod = env->GetStaticMethodID(ExceptionHandlerClass, "handleException", "()V");
         if (ExceptionHandlerMethod == NULL)
             LOGE("Could not bind exception handler method");

// handle exception
env->CallStaticVoidMethod(ExceptionHandlerClass, ExceptionHandlerMethod);

if(env->ExceptionCheck()) {
     LOGI("got exception");
     env->ExceptionDescribe();
}

if(isDebug)
     LOGI("exception handled");
}*

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This is my java method:

*package com.abc;
public class Myclass {
   public static void handleException() {
      System.out.println("inside handle exception");
   }
}*

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This used to work fine before Android 5.0. But in Lollipop, I am not able to 
call my java method as I am not able to see 'inside handle exception log on 
Logcat console.

Here are the log msgs I see on logcat:

*12-01 13:57:46.617: I/AACRNative(1617): attaching thread ...
12-01 13:57:46.617: I/AACRNative(1617): handle exception
12-01 13:57:46.619: I/AACRNative(1617): got exception
12-01 13:57:46.620: W/art(1617): JNI WARNING: java.lang.StackOverflowError 
thrown while calling printStackTrace
12-01 13:57:46.620: I/AACRNative(1617): exception handled*

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Any help would be really appreciable.

Original issue reported on code.google.com by xuan.and...@gmail.com on 14 Apr 2015 at 4:25