Unable to reach a break point in C++ using Android Studio and ndkBuild

Question

I'm trying to reach a break point in a simple C++ code:

Here the .cpp

#include <jni.h>
#include <string>

extern "C"
{

jstring Java_com_comscore_android_app_MainActivity_stringFromJNI(
        JNIEnv* env,
        jobject /* this */) {
    std::string hello = "Hello from C++ lalalaaaaaa";
    return env->NewStringUTF(hello.c_str());
}
}

here the gradle file:

android {
    compileSdkVersion 23
    buildToolsVersion "24.0.1"
    defaultConfig {
        applicationId "com.comscore"
        minSdkVersion 10
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        externalNativeBuild {
            ndkBuild {
                arguments "NDK_APPLICATION_MK:=src/main/jni/Application.mk"
            }
        }
    }
    externalNativeBuild{
        ndkBuild{
            path "src/main/jni/Android.mk"
        }
    }
...
}

The Android.mk:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES := native-lib.cpp
LOCAL_MODULE    := native-lib


LOCAL_LDLIBS := -llog

LOCAL_CPPFLAGS += -fsigned-char -fexceptions -frtti -g -O0 -std=c++0x -std=gnu++0x 
LOCAL_CFLAGS += -fsigned-char -fexceptions -frtti -g -O0 -std=c++0x -std=gnu++0x 

include $(BUILD_SHARED_LIBRARY)

And the Application.mk

APP_ABI := all
APP_STL := gnustl_static

The application compiles and works but I'm not able to stop in any breakpoint in the C++ code while running the debugger. I can see how it loads the native libraries but it doesn't stop any where and Android studio is telling me that the break point has been attached.

I'm using Android Studio 2.2 Preview 6

Can anybody help me?

Answer 1

In my case I have two modules, one with the C++ code (library) and an other one with the application that consumes the library module.

The problem was that I tried to debug the library module uaing the app module, so I just need to specify the folder where the debug symbols are:

Run->Edit configurations... -> Debuggerand in the symbol directories tab add the right path. For instance:

/path_to_my_project/lib_module/build/intermediates/ndkBuild/flavor/debug/obj/local/x86

Answer 2

app.imp file contains "<"facet type="native_android_gradle">", , option=SELECTED_BUILD_VARIANT..

check if value="debug"