我在我的应用程序中随机获取本机崩溃signal 11 (SIGSEGV), code 1 (SEGV_MAPERR)
。该应用程序循环遍历文件,并在C++代码中对其进行分析,并返回一个浮点数组。这是在AsyncTask中完成的,该AsyncTask在处理文件时会运行一段时间。我在导致崩溃的代码中做错了什么?还是超能力问题?谢谢。
这是AsyncTask doInBackground函数:
protected String doInBackground(Object... urls) {
for (int i = 0; i < songFiles.size(); i++) {
SongFile temp = songFiles.get(i);
try {
float[] f = Analyser.getInfo(temp.getPath());
if (f != null && f.length > 1) {
...save to DB
}
}
} catch (Exception e) {
}
}
return "";
}
Java和C++代码之间的函数:
extern "C" JNIEXPORT jfloatArray Java_com_superpowered_SuperpoweredPlayer_getInfo(JNIEnv *env, jobject instance,jstring filepath) {
jfloatArray ret;
char *Path= (char *) env->GetStringUTFChars(filepath, JNI_FALSE);
ret = (jfloatArray)env->NewFloatArray(2);
float *values = superpoweredPlayer->getKey(Path);
env->SetFloatArrayRegion(ret, 0, 2, values);
env->ReleaseStringUTFChars(filepath, Path);
return ret;
}
C++函数getKey:
float *SuperpoweredPlayer::getKey(char *url) {
SuperpoweredDecoder *decoder = new SuperpoweredDecoder();
//decoder initialize from the URL input
const char *openError = decoder->open(url, false, 0, 0);
if (openError) {
delete decoder;
return NULL;
};
// Create the analyzer.
SuperpoweredOfflineAnalyzer *analyzer = new SuperpoweredOfflineAnalyzer(decoder->samplerate, 0, decoder->durationSeconds);
// Create a buffer for the 16-bit integer samples coming from the decoder.
short int *intBuffer = (short int *)malloc(decoder->samplesPerFrame * 2 * sizeof(short int) + 16384);
// Create a buffer for the 32-bit floating point samples required by the effect.
float *floatBuffer = (float *)malloc(decoder->samplesPerFrame * 2 * sizeof(float) + 1024);
// Processing.
while (true) {
// Decode one frame. samplesDecoded will be overwritten with the actual decoded number of samples.
unsigned int samplesDecoded = decoder->samplesPerFrame;
if (decoder->decode(intBuffer, &samplesDecoded) == SUPERPOWEREDDECODER_ERROR) break;
if (samplesDecoded < 1) break;
// Convert the decoded PCM samples from 16-bit integer to 32-bit floating point.
SuperpoweredShortIntToFloat(intBuffer, floatBuffer, samplesDecoded);
// Submit samples to the analyzer.
analyzer->process(floatBuffer, samplesDecoded);
// Update the progress indicator.
// progress = (double)decoder->samplePosition / (double)decoder->durationSamples;
};
// Get the result.
unsigned char *averageWaveform = NULL, *lowWaveform = NULL, *midWaveform = NULL, *highWaveform = NULL, *peakWaveform = NULL, *notes = NULL;
int waveformSize, overviewSize, keyIndex;
char *overviewWaveform = NULL;
float loudpartsAverageDecibel, peakDecibel, bpm, averageDecibel, beatgridStartMs = 0;
analyzer->getresults(&averageWaveform, &peakWaveform, &lowWaveform, &midWaveform, &highWaveform, ¬es, &waveformSize, &overviewWaveform, &overviewSize, &averageDecibel, &loudpartsAverageDecibel, &peakDecibel, &bpm, &beatgridStartMs, &keyIndex);
float *ret;
ret=(float*)malloc(2*sizeof(float));
ret[0] = bpm;
ret[1] = keyIndex;
// Cleanup.
delete decoder;
delete analyzer;
free(intBuffer);
free(floatBuffer);
// Done with the result, free memory.
if (averageWaveform) free(averageWaveform);
if (lowWaveform) free(lowWaveform);
if (midWaveform) free(midWaveform);
if (highWaveform) free(highWaveform);
if (peakWaveform) free(peakWaveform);
if (notes) free(notes);
if (overviewWaveform) free(overviewWaveform);
return ret;
}
最佳答案
请仔细检查您是否释放了所有内存,正在分配并且以相反的顺序释放了内存/删除对象,例如如果先创建对象A,然后创建对象B,则应先删除B,再删除A。
float* values
您确定使用free()释放在analyzer-> getresults()中分配的内存是正确(且安全)的,因为超能力中的free可能与代码中的free有所不同(如果两者静态链接到标准C库) ?