Forums - dlopen failed: cannot find "libadsprpc.so"

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dlopen failed: cannot find "libadsprpc.so"
neel.parikh
Join Date: 14 Sep 17
Posts: 1
Posted: Thu, 2017-09-21 18:02
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I am trying to build an android apk calling certain functions on the aDSP. I am able to get the calculator app running and also made another simple shell program calling four new API calls. I am using android studio to build the apk, I compiled the library file in the hexagon sdk environment with a java wrapper using swig.

BUILD_DLLS += libmylib
libmylib_QAICIDLS += inc/mylib
libmylib_C_SRCS += $V/mylib_stub src/mylib_wrapper
llibmylib_DLLS += $(LIB_DSPRPC)
 
I copy the mylib.so and libadsprpc.so to jniLibs/armeabi in android studio. It compiles but gives this error when I try to run the app.
 
E/AndroidRuntime: FATAL EXCEPTION: main
                                                                       Process: com.sample.myapp, PID: 21994
                                                                       java.lang.UnsatisfiedLinkError: dlopen failed: cannot find "libadsprpc.so" from verneed[0] in DT_NEEDED list for "/data/app/com.sample.myapp/lib/arm/libmylib.so"
                                                                           at java.lang.Runtime.loadLibrary0(Runtime.java:977)
                                                                           at java.lang.System.loadLibrary(System.java:1567)
                                                                           at com.sample.myapp.MainActivity.onCreate(MainActivity.java:15)
                                                                           at android.app.Activity.performCreate(Activity.java:6912)
                                                                           at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
                                                                           at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2877)
                                                                           at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2985)
                                                                           at android.app.ActivityThread.-wrap14(ActivityThread.java)
                                                                           at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1635)
                                                                           at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                           at android.os.Looper.loop(Looper.java:154)
                                                                           at android.app.ActivityThread.main(ActivityThread.java:6692)
                                                                           at java.lang.reflect.Method.invoke(Native Method)
                                                                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
                                                                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

 

The mylib.so still works fine with my shell program.

Also, where do I have to store the libmylib_skel.so ? 

Any clue what the issue is? I assume I am not saving something in the right location.

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Re: dlopen failed: cannot find "libadsprpc.so"
guillaume.poirier
Join Date: 16 Feb 17
Posts: 7
Posted: Tue, 2017-10-03 07:13
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I have the same issue. Did you solve it ? I am trying to get the calculator example to run in an Android app with Android Studio.

In Android.mk I created two modules for the libcalculator_test.so and libcalculator.so:

include $(CLEAR_VARS)
LOCAL_MODULE := calculator_test-prebuilt
LOCAL_SRC_FILES += $(LOCAL_PATH)/libs/libcalculator_test.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := calculator-prebuilt
LOCAL_SRC_FILES += $(LOCAL_PATH)/libs/libcalculator.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

Then I create a library that will try to call calculator_test() function inside libcalculator_test.so.

LOCAL_MODULE := mylib
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_C_INCLUDES += Mylib.h
LOCAL_SRC_FILES := Mylib.cpp
LOCAL_SHARED_LIBRARIES := calculator_test-prebuilt calculator-prebuilt
LOCAL_LDLIBS += -llog -ldl -landroid

include $(BUILD_SHARED_LIBRARY)

I load both libcalculator_test.so and libcalculator.so from my Java code:

System.loadLibrary("mylib");
System.loadLibrary("calculator_test");
System.loadLibrary("calculator");

At runtime I get the same error:

app/build/intermediates/ndkBuild/debug/obj/local/armeabi-v7a/libcalculator.so

Native code library failed to load.
java.lang.UnsatisfiedLinkError: dlopen failed: library "libadsprpc.so" not found

Any help would be very appreciated !

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Re: dlopen failed: cannot find "libadsprpc.so"
guillaume.poirier
Join Date: 16 Feb 17
Posts: 7
Posted: Tue, 2017-10-03 13:30
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Just figured it out. I was very close and not sure why I did not go the extra mile...

Just added any dependencies that dlopen complains about at runtime (in my case adsprpc and c++) in Android.mk:

include $(CLEAR_VARS)
LOCAL_MODULE := adspprc-prebuilt
LOCAL_SRC_FILES += $(LOCAL_PATH)/libs/libadsprpc.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := c++-prebuilt
LOCAL_SRC_FILES += $(LOCAL_PATH)/libs/libc++.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

And load them in Java:

System.loadLibrary("adsprpc");
System.loadLibrary("c++");
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Re: dlopen failed: cannot find "libadsprpc.so"
chenxin511
Join Date: 25 Jun 17
Posts: 5
Posted: Sat, 2017-10-14 01:39
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I have the same problem with you, have you soloved this problem?

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Re: dlopen failed: cannot find "libadsprpc.so"
gaolx2
Join Date: 15 Sep 17
Posts: 2
Posted: Tue, 2018-01-09 01:38
Top

I also have a similar question. It seems that the libadsprpc.so and other ".so" builded by the Hexgon sdk have no "SONAME" segment in the ELF.  But i don't know how to add this "SONAME" to the library.

arm-linux-androideabi-readelf -d libadsprpc.so sais:

 

Dynamic section at offset 0xf28 contains 20 entries:
  Tag        Type                         Name/Value
 0x00000003 (PLTGOT)                     0x1ff0
 0x00000002 (PLTRELSZ)                   8 (bytes)
 0x00000017 (JMPREL)                     0x3e8
 0x00000014 (PLTREL)                     REL
 0x00000006 (SYMTAB)                     0x128
 0x0000000b (SYMENT)                     16 (bytes)
 0x00000005 (STRTAB)                     0x218
 0x0000000a (STRSZ)                      294 (bytes)
 0x00000004 (HASH)                       0x340
 0x00000001 (NEEDED)                     Shared library: [liblog.so]
 0x00000001 (NEEDED)                     Shared library: [libm.so]
 0x00000001 (NEEDED)                     Shared library: [libstdc++.so]
 0x00000001 (NEEDED)                     Shared library: [libc.so]
 0x00000010 (SYMBOLIC)                   0x0
 0x0000001e (FLAGS)                      SYMBOLIC BIND_NOW
 0x6ffffffb (FLAGS_1)                    Flags: NOW
 0x6ffffff0 (VERSYM)                     0x390
 0x6ffffffc (VERDEF)                     0x3b0
 0x6ffffffd (VERDEFNUM)                  2
 0x00000000 (NULL)                       0x0
 

 

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Re: dlopen failed: cannot find "libadsprpc.so"
vasiliy.sabadazh
Join Date: 20 Feb 18
Posts: 2
Posted: Wed, 2018-03-07 14:33
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Hi guillaume.poirier,

Looks like your Android.mk references a "libadsprpc.so" which is located in your project directory. But where did you get it in the first place? I cannot find it anywhere in SNPE SDK directory nor within system directories of the device. Or should I build it from some sources before loading?

You would help me a lot with any hint, thank you in advance!

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