包名称上的android art runtime check_jni.cc错误

Question

--EDIT--由于模糊的build.gradle,我有太多版本的共享库浮动了...

./src/main/jniLibs/armeabi-v7a/libaudioboo-native.so
rob@ app$ rm ./src/main/libs/armeabi-v7a/libaudioboo-native.so
rob@ app$ rm ./src/main/obj/local/armeabi-v7a/libaudioboo-native.so
rob@ app$ rm ./src/main/jniLibs/armeabi-v7a/libaudioboo-native.so 

已解决的问题 - 将构建更改为以下内容仅使用./src/main/libs中的共享库

sourceSets {
    main {
        jni.srcDirs = [] /*disable automatic ndk-build call */
        jniLibs.srcDir 'src/main/libs'
    }
}

在android5上打破了所以我通过为Android-studio(1.0)ndk build推文来解决它.我按照答案@holo的指示扫描了所有'findClass'的代码.注 - 在第34行更改了字符串常量

 "fm.audioboo.jni.FLACStreamEncoder"; to "fm/audioboo/jni/FLACStreamEncoder";

那并没有解决任何问题.

java代码调用一个函数,在该本机函数执行之前,看起来艺术框架本身就是在第二个arg中使用一个错误的char分隔符调用FindClass(_JNIEnv*,char const*).如果查看pastebin链接的第46-48行,它看起来就像调用本机函数一样.该框架只会抛出错误的包名称Findclass错误.请注意,本机函数的第一行是在运行时未到达的日志语句.

Java层......

  public FLACStreamEncoder(String outfile, int sample_rate, int channels,
      int bits_per_sample)
  {
    init(outfile, sample_rate, channels, bits_per_sample);
  }

...
  native private void init(String outfile, int sample_rate, int channels,
      int bits_per_sample);

...
  static {
    System.loadLibrary("audioboo-native");
  }

CPP层...函数永远不会到达第一行日志stmt.

extern "C" {

void
Java_fm_audioboo_jni_FLACStreamEncoder_init(JNIEnv * env, jobject obj,
    jstring outfile, jint sample_rate, jint channels, jint bits_per_sample)
{
    aj::log(ANDROID_LOG_DEBUG, LTAG, "Begin INIT extern call");
  assert(sizeof(jlong) >= sizeof(FLACStreamEncoder *));

  FLACStreamEncoder * encoder = new FLACStreamEncoder(
      aj::convert_jstring_path(env, outfile), sample_rate, channels,
      bits_per_sample);

  char const * const error = encoder->init();
  if (NULL != error) {
    delete encoder;

    aj::throwByName(env, IllegalArgumentException_classname, error);
    return;
  }

  set_encoder(env, obj, encoder);
}

一切正常(jni build/android buid/android-java调用cpp)直到android 5使用ndk 10-C构建

android5/ART的新功能似乎是'check_jni.cc'和某种严格的模式给出错误:

D/FLACRecorder(26743): Setting up encoder /data/data/com.borneo.speech/files/20141123081747.flac rate: 22050 channels: 1 format 16
F/art     (26743): art/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: illegal class name 'fm.audioboo.jni.FLACStreamEncoder'
F/art     (26743): art/runtime/check_jni.cc:65]     (should be of the form 'package/Class', [Lpackage/Class;' or '[[B')
F/art     (26743): art/runtime/check_jni.cc:65]     in call to FindClass
F/art     (26743): art/runtime/check_jni.cc:65]     from void fm.audioboo.jni.FLACStreamEncoder.init(java.lang.String, int, int, int)
F

完整的堆栈跟踪: 注意第46 - 48行

查看日志,就好像框架正在使用CPP中的第2个'thisClazz'arg对'findClass'进行OWN调用:

Java_fm_audioboo_jni_FLACStreamEncoder_init(JNIEnv * env, jobject obj, ...  

并且它违反艺术运行时检查的错误arg值.

但是我没有运行'javah'来创建java接口的任何头文件,因为它在我获得git项目之前就完成了.

我很难过.本机似乎进入函数,从未到达函数的第一行(log statemt),立即失败

 /system/lib/libart.so (art::CheckJNI::FindClass(_JNIEnv*, char const*)+66

ndk(R10C)链接cpp类如下:

make: Entering directory `/home/rob/tmp/audioboo-android/app/src/main/jni'
[armeabi-v7a] Compile thumb  : audioboo-ogg <= bitwise.c
[armeabi-v7a] Compile thumb  : audioboo-ogg <= framing.c
[armeabi-v7a] StaticLibrary  : libaudioboo-ogg.a
[armeabi-v7a] Compile thumb  : audioboo-flac <= bitmath.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= bitreader.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= cpu.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= crc.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= fixed.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= float.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= format.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= lpc.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= md5.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= memory.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= metadata_iterators.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= metadata_object.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= ogg_decoder_aspect.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= ogg_encoder_aspect.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= ogg_helper.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= ogg_mapping.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= stream_decoder.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= stream_encoder.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= stream_encoder_framing.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= window.c
[armeabi-v7a] Compile thumb  : audioboo-flac <= bitwriter.c
[armeabi-v7a] StaticLibrary  : libaudioboo-flac.a
[armeabi-v7a] Compile++ thumb: audioboo-native <= FLACStreamEncoder.cpp
[armeabi-v7a] Compile++ thumb: audioboo-native <= FLACStreamDecoder.cpp
[armeabi-v7a] Compile++ thumb: audioboo-native <= util.cpp
[armeabi-v7a] StaticLibrary  : libstdc++.a
[armeabi-v7a] SharedLibrary  : libaudioboo-native.so
[armeabi-v7a] Install        : libaudioboo-native.so => libs/armeabi-v7a/libaudioboo-native.so
make: Leaving directory `/home/rob/tmp/audioboo-android/app/src/main/jni'

Android加载了高于NP 的库audioboo-native然后抛出

JNI DETECTED ERROR IN APPLICATION: illegal class name 'fm.audioboo.jni.FLACStreamEncoder''

从Java到本机函数的调用,我不明白为什么？

Answer 1

我在升级到Android 5时遇到了同样的问题,并且已经对它进行了排序.

该错误在您的本机代码中,而不在您的Java代码中.在您的本机代码中的某个位置,您有一个函数可以通过jni作为jobject传递FlacStreamEncoder对象,并使用以下行检索它:

    jclass streamEncoder = env->FindClass("fm.audioboo.jni.FLACStreamEncoder");

但是JNI应该使用"/"作为分隔符而不是".",所以这一行应该是:

    jclass streamEncoder = env->FindClass("fm/audioboo/jni/FLACStreamEncoder");

代替.以前版本的android默默地忽略了这个问题,但现在它只是在你脸上爆炸了.

从 https://android.googlesource.com/platform/art/+/kitkat-dev/runtime/check_jni.cc

    // Checks that 'class_name' is a valid "fully-qualified" JNI class name, like "java/lang/Thread"
    // or "[Ljava/lang/Object;". A ClassLoader can actually normalize class names a couple of
    // times, so using "java.lang.Thread" instead of "java/lang/Thread" might work in some
    // circumstances, but this is incorrect
    void CheckClassName(const char* class_name) {
        if (!IsValidJniClassName(class_name)) {
            JniAbortF(function_name_,
                      "illegal class name '%s'\n"
                      " (should be of the form 'package/Class', [Lpackage/Class;' or '[[B')",
                      class_name);
            }
        }
    }