LibAIFF CloseFile：指针被释放没有被分配是随机发生 [英] LibAIFF CloseFile: Pointer being freed was not allocated occurs randomly
问题描述
我已经写了一张code的试图搜索目录及其两个AIFF文件和子文件夹使用LibAIFF库导入，然后对他们进行一些处理操作。
I have written a piece of code that attempts to search a directory and its subfolders for two AIFF files and using the LibAIFF library to import and then perform some processing operations on them.
第1部分：搜索目录中的文件
Part 1: Searching the directory for the files
有关该计划的一部分，我需要寻找这些文件与已知的名称（例如SineSweepA.aiff和SineSweepB.aiff）（可除了在其文件名的差异被认为是相同的AIFF文件）然后构造它（其中我不知道的长度绝对路径（因为我的程序需要在那里AIFFs可以位于内 MainDirectory - 见下面code），但知道会在长度小于200个字符）。我能够成功，始终做到这一点使用下面的一段code的：
For this part of the program, I need to look for the files (which can be thought of as identical AIFF files except for a difference in their filenames) with known names (for example SineSweepA.aiff and SineSweepB.aiff) and then construct the absolute path to it (the length of which I am unaware of (since my program needs to work on different computers where the AIFFs can be located within different subfolders within a MainDirectory - see code below) but know will be less than 200 characters in length). I am able to do this successfully and consistently using the following piece of code:
void file_search(char* parentDir, char* subFolder, char* filenamePrefix, char* tempString, char* tempFilepath, int* foundFlag, int* level);
int32_t *import_sweeps(char* sweepFilepath, uint64_t* numSamples, int* numChannels, double* samplingRate, int* bitDepth, int* segmentSize, int* importFlag);
int main()
{
...
char MainDirectory[200] = "/Users/rrr/Documents/Foldername1/";
char tempFilepath[200], tempFilepathR[200], parentDir[200], filenamePrefix[200], subFolder[200], tempString[200];
int level = 0, foundFlag = 0;
int numChannels = 0;
int bitDepth;
int segmentSize;
int importFlag = 0;
int32_t *sweepRfile = NULL;
uint64_t numSamples = 0, numSamplesR = 0;
unsigned long templen;
double samplingRate = 0.0;
char *sweepFilepath = NULL, *sweepFilepathR = NULL; // Allocated to specific size later
strcpy(parentDir, MainDirectory);
strcat(parentDir, "SubFolderName1/");
strcpy(tempFilepathR, parentDir);
strcpy(filenamePrefix, "KnownFilenamePrefix1");
// file_search() searches for a specific file with a known name and constructs the absolute path to the file and stores it in tempFilepathR. The function is shown further below.
file_search(parentDir, subFolder, filenamePrefix, tempString, tempFilepath, &foundFlag, &level);
if (foundFlag)
{
sprintf(tempFilepath, "%s%s/KnownFilenamePrefix1%s.aiff", parentDir, subFolder, subFolder);
sprintf(tempFilepathR, "%s%s/KnownFilenamePrefix2%s.aiff", parentDir, subFolder, subFolder);
}
...
(to be continued in Part 2 of my question below)
}
void file_search(char* dir, char* subfolder, char* fileprefix, char* filename, char* filepath, int*flag, int* level)
{
DIR *dp;
struct dirent *entry; // entry is a pointer to the structure "dirent" defined in <dirent.h>
struct stat statbuf; // the structure "stat" is defined in <stat.h>
if((dp = opendir(dir)) == NULL) {
fprintf(stderr,"Cannot open directory: %s\n", dir);
return;
}
chdir(dir); // this sets the working directory to the string pointed to by "dir"
while((entry = readdir(dp)) != NULL)
{
lstat(entry->d_name, &statbuf);
if(S_ISDIR(statbuf.st_mode)) // Tests for a directory
{
// Found a directory
if(strcmp(".",entry->d_name) == 0 || strcmp("..",entry->d_name) == 0)
{
// Ignore . and ..
continue;
}
if(level[0] < 1)
{
// Proceed down one level and search again
strcpy(subfolder,entry->d_name);
level[0] = level[0] + 1;
// Recursive function call
file_search(entry->d_name, subfolder, fileprefix, filename, filepath, postfilepath, flag, level);
level[0] = level[0] - 1;
if(flag[0] == 1)
{
// Exit loop if a file was found at a lower level
break;
}
}
}
else
{
sprintf(filename, "%s%s.aiff", fileprefix, subfolder);
if(strcmp(entry->d_name,filename) == 0)
{
// File found. Construct absolute path to file
sprintf(filepath, "%s%s/%s", filepath, subfolder, filename); // Pass filepath outside
flag[0] = 1; //Appropriate file found
break;
}
}
}
chdir("..");
closedir(dp);
}
因此，通过使用上述code，我能够通过子与已知 MainDirectory ，构建搜索成功搜索与给定的文件名2 AIFF文件的绝对路径并将它们存储在 tempFilepath 和 tempFilepathR 。下一步是导入这两个文件，这是我碰到的一个问题。
So by using the above code, I am able to successfully search for two AIFF files with given filenames by searching through subfolders with a known MainDirectory, construct their absolute paths and store them in tempFilepath and tempFilepathR. The next step is to import these two files and this is where I run into a problem.
第2部分：导入文件
我遇到的问题是如下：我实现了LibAIFF库导入的文件。问题是，如果我运行的程序，说了N次，然后在一些运行中，第一个文件被导入但不是第二个，其他运行第二被导入但不是第一次（注意，如果第一次没有按'吨得到进口，程序停止）。 在我解释的错误，请知道有与AIFF文件没有问题，对于这个问题的缘故，你可以假设它们是完全相同的，即使它们的绝对路径和文件名是相同的，除了一个人后缀 A.aiff 和其他 B.aiff 。这些文件的路径存储在相同定义的变量字符串（ tempFilepath 和 tempFilepathR ）。
The problem I run into is as follows: I implemented the LibAIFF library to import the files. The issue is that if I run the program, say N times, then on some of the runs, the first file gets imported but not the second, on other runs the second gets imported but not the first (note that if the first doesn't get imported, the program stops). Before I explain the error, please know that there is no issue with the AIFF files, for the sake of this problem you can assume they are identical and that even their absolute paths and filenames are identical except one has a suffix A.aiff and the other B.aiff. These file paths are stored as strings in identically defined variables (tempFilepath and tempFilepathR).
这是我的code的必要组成部分从上面继续休息
int main()
{
// Continued from above
...
// Copy over exact file paths (I had to do this because the function AIFF_OpenFile which is part of the LibAIFF library and shown below refused to accept a statically allocated char variable such as tempFilepath)
templen = strlen(tempFilepathR); // tempFilepath and tempFilepathR always have the same length
sweepFilepath = malloc(templen + 1);
strcpy(sweepFilepath, tempFilepath);
// Proceed to import the FIRST AIFF (returned to sweepRfile from import_sweeps())
sweepRfile = import_sweeps(sweepFilepath, &numSamples, &numChannels, &samplingRate, &bitDepth, &segmentSize, &importFlag);
if (importFlag) // The import was successful
{
free(sweepFilepath);
// Do some processing with the successfully imported AIFF
free(sweepRfile);
}
else // The import was unsuccessful and sweepRfile (which is usually malloc'ed in the import_sweeps() function is not malloc'ed
{
free(sweepFilepath);
}
// Now for the SECOND AIFF (I can overwrite a lot of the variables used for the first AIFF because I don't need them)
sweepFilepathR = malloc(templen + 1); // templen is assigned above
strcpy(sweepFilepathR, tempFilepathR);
// Proceed to import the SECOND AIFF (returned to sweepRfile from import_sweeps())
sweepRfile = import_sweeps(sweepFilepathR, &numSamplesR, &numChannels, &samplingRate, &bitDepth, &segmentSize, &importFlag);
if (importFlag) // The import was successful
{
free(sweepFilepathR);
// Do some processing with the successfully imported AIFF
free(sweepRfile);
}
else // The import was unsuccessful and sweepRfile (which is usually malloc'ed in the import_sweeps() function is not malloc'ed
{
free(sweepFilepathR);
}
...
// Rest of code in main is irrelevant because it doesn't even get there.
}
<强>的断裂总是import_sweeps内发生（）函数（有时用于第一AIFF和有时为秒）。功能如下所示
int32_t *import_sweeps(char* sweepFilepath, uint64_t* numSamples, int* numChannels, double* samplingRate, int* bitDepth, int* segmentSize, int* importFlag)
{
// Initialize files for importing */
AIFF_Ref fileref;
// Import Routine */
fileref = AIFF_OpenFile(sweepFilepath, F_RDONLY);
if(fileref)
{
// File opened successfully. Proceed to intialize files for getting information about AIFF file
uint64_t nSamples;
int nSamplePts, channels, bitsPerSample, segSize, temp;
double smpr;
// Get AIFF file format details
temp = AIFF_GetAudioFormat(fileref, &nSamples, &channels, &smpr, &bitsPerSample, &segSize);
if (temp < 1) {
fprintf(stderr,"Error getting audio format.\n");
AIFF_CloseFile(fileref);
return (int32_t) 0;
}
else
{
numSamples[0] = nSamples;
samplingRate[0] = smpr;
numChannels[0] = channels;
bitDepth[0] = bitsPerSample;
segmentSize[0] = segSize;
nSamplePts = ((int) nSamples)*channels;
int32_t *samples = malloc((nSamplePts+1) * sizeof(int32_t));
// Read AIFF
temp = AIFF_ReadSamples32Bit(fileref, samples, nSamplePts);
if (temp != -1)
{
AIFF_CloseFile(fileref);
importFlag[0] = 1;
return samples;
}
else
{
fprintf(stderr,"Unable to read AIFF.\n");
AIFF_CloseFile(fileref);
return (int32_t) 0;
}
}
}
else
{
fprintf(stderr,"Unable to open AIFF file.\n");
}
return (int32_t) 0;
}
里面import_sweeps（）以上时，AIFF文件总是成功地通过调用函数 AIFF_ReadSamples32Bit（fileref，样品，nSamplePts）读取; 。因此，该温度值是从未-1。每当（如上所述，我会在下面给出实际的错误信息）发生错误的时候，它总是在尝试调用发生 AIFF_CloseFile（fileref）;
Inside import_sweeps() above, the AIFF file is ALWAYS successfully read by calling the function AIFF_ReadSamples32Bit(fileref, samples, nSamplePts);. Therefore, the temp value is never -1. Whenever an error (as described above and I will give the actual error message below) happens, it ALWAYS occurs when it tries to call AIFF_CloseFile(fileref);.
以下显示功能 AIFF_ReadSamples32Bit 和 AIFF_CloseFile 作为LibAIFF库中定义。
Shown below are the functions AIFF_ReadSamples32Bit and AIFF_CloseFile as defined in the LibAIFF library.
int AIFF_ReadSamples32Bit(AIFF_Ref r, int32_t * samples, int nSamplePoints)
{
int n = nSamplePoints;
void *buffer;
int i, j;
size_t h;
size_t len;
int segmentSize;
int32_t *dwords;
int16_t *words;
int8_t *sbytes;
uint8_t *inbytes;
uint8_t *outbytes;
uint8_t x, y, z;
if (!r || !(r->flags & F_RDONLY))
return -1;
if (n % (r->nChannels) != 0)
return 0;
if (n < 1 || r->segmentSize == 0) {
if (r->buffer) {
free(r->buffer);
r->buffer = NULL;
r->buflen = 0;
}
return -1;
}
segmentSize = r->segmentSize;
len = (size_t) n * segmentSize;
if ((r->buflen) < len) {
if (r->buffer)
free(r->buffer);
r->buffer = malloc(len);
if (!(r->buffer)) {
return -1;
}
r->buflen = len;
}
buffer = r->buffer;
h = AIFF_ReadSamples(r, buffer, len);
if (h < (size_t) segmentSize) {
free(r->buffer);
r->buffer = NULL;
r->buflen = 0;
return 0;
}
n = (int) h;
if (n % segmentSize != 0) {
free(r->buffer);
r->buffer = NULL;
r->buflen = 0;
return -1;
}
n /= segmentSize;
switch (segmentSize) {
case 4:
dwords = (int32_t *) buffer;
for (i = 0; i < n; ++i)
samples[i] = dwords[i];
break;
case 3:
inbytes = (uint8_t *) buffer;
outbytes = (uint8_t *) samples;
n <<= 2; /* n *= 4 */
j = 0;
for (i = 0; i < n; i += 4) {
x = inbytes[j++];
y = inbytes[j++];
z = inbytes[j++];
#ifdef WORDS_BIGENDIAN
outbytes[i] = x;
outbytes[i + 1] = y;
outbytes[i + 2] = z;
outbytes[i + 3] = 0;
#else
outbytes[i] = 0;
outbytes[i + 1] = x;
outbytes[i + 2] = y;
outbytes[i + 3] = z;
#endif
}
n >>= 2;
break;
case 2:
words = (int16_t *) buffer;
for (i = 0; i < n; ++i) {
samples[i] = (int32_t) (words[i]) << 16;
}
break;
case 1:
sbytes = (int8_t *) buffer;
for (i = 0; i < n; ++i) {
samples[i] = (int32_t) (sbytes[i]) << 24;
}
break;
}
return n;
}
和
int AIFF_CloseFile(AIFF_Ref ref)
{
int r;
if (!ref)
return -1;
if (ref->flags & F_RDONLY) {
AIFF_ReadClose(ref); // BREAK OCCURS HERE EVERYTIME
r = 1;
} else if (ref->flags & F_WRONLY) {
r = AIFF_WriteClose(ref);
} else {
r = -1;
}
return r;
}
突破发生在 AIFF_ReadClose（REF）; 每次。所以，我也显示出下面这个函数。
The break occurs at AIFF_ReadClose(ref); EVERYTIME. So I have also shown this function below.
static void AIFF_ReadClose(AIFF_Ref r)
{
if (r->buffer)
free(r->buffer);
if (r->buffer2)
free(r->buffer2); // THIS IS WHERE THE BREAK OCCURS EVERYTIME
Unprepare(r);
fclose(r->fd);
free(r);
return;
}
突破总是出现如上图所示以下是在错误信息：（25693,0x7fff7db87310）的malloc： *错误对象0x4000000000000000：幸福的指针释放没有被分配
* 在malloc_error_break设置一个断点调试
The break always occurs as shown above. The following is the error message: (25693,0x7fff7db87310) malloc: * error for object 0x4000000000000000: pointer being freed was not allocated * set a breakpoint in malloc_error_break to debug
所以基本上，出现上述错误的未predictably 。当没有发生，我的code完美的作品。 任何帮助，以我会如何解决这个问题是非常AP preciated。
So basically, the above error occurs unpredictably. When it doesn't occur, my code works perfectly. Any help as to how I might solve this problem is much appreciated.
如果有人愿意下载LIBAIFF库，以进一步调查和帮助我的链接库是：的 http://aifftools.sourceforge.net/libaiff/ 。
IF ANYONE IS WILLING TO DOWNLOAD THE LIBAIFF LIBRARY TO INVESTIGATE FURTHER AND HELP ME OUT, the link to the library is: http://aifftools.sourceforge.net/libaiff/.
在此先感谢您的任何建议！
Thanks in advance for any suggestions!
推荐答案
1，请确认缓冲器2 已在使用前初始化的 NULL 。在所有粘贴codeS，我找不到任何转让或内存分配缓冲器2 。
1, please confirm buffer2 has been initialized with NULL before using. In all your pasted codes, I can not find any assignment or memory allocation for buffer2.
2，请致电免费，等之后分配具有NULL指针：
2, please assign the pointer with NULL after calling free, like:
if (r->buffer)
{
free(r->buffer);
r->buffer = NULL;
}
if (r->buffer2)
{
free(r->buffer2);
r->buffer2 = NULL;
}
如果这一切都无法解决您的问题，请给予更多的code约缓冲器2 。
If all this can not resolve you problem, please give more code about buffer2.
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