Question

我有一些C ++代码（使用ROOT库）我继承了（~1.5k行），我要做的第一件事就是解决与打开和阅读有关的bug一个二进制文件，在运行时作为参数传递。代表问题的一些代码如下所示：

[~/this]$ ./Make_RWQ_Tree /Users/me/this/that/mydata_f00000001.rwq
inFile: ./mydata_f00000001.rwq
outFile: ./mydata_f00000001.tru
Header Info:
a = 12
b = 345
c = 51
N = 100
G = 100
numEventsInFile = 1000
   r = 1
   s = 2
   t = 4
*** Show info for each of the events in the file normally ***

[~/this]$
[~/this]$ mv ./mydata_f00000001.rwq /Users/me/this/that/another/directory/deeper/
[~/this]$ ./Make_RWQ_Tree /Users/me/this/that/another/directory/deeper/mydata_f00000001.rwq
inFile: ./mydata_f00000001.rwq
outFile: ./mydata_f00000001.tru
Header Info:
a = 12
b = 345
c = 51
N = 100
G = 100
numEventsInFile = 1000

 *** Break *** segmentation violation



===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================

#5  0x00007fffffe007c5 in __memcpy ()
#6  0x00007fff87de59f7 in std::basic_streambuf<char, std::char_traits<char> >::xsgetn ()
#7  0x00007fff87dc7b19 in std::basic_filebuf<char, std::char_traits<char> >::xsgetn ()
#8  0x00007fff87dcd8c1 in std::istream::read ()
#9  0x0000000100001e25 in main (argc=<value temporarily unavailable, due to optimizations>, argv=<value temporarily unavailable, due to optimizations>) at Make_RWQ_Tree.cxx:175

因此，根据文件的位置，在成功打开并从文件中读取多个值后，我会收到Seg Fault 。报告的第175行只是常规inFile.read。

我很抱歉，如果没有实际的代码行，这可能很难提供帮助，但我认为我不能将代码最小化到一个说明它的小工作版本。有没有经历过这种事情的人？

Answer 1

有人使用固定大小的缓冲区来处理文件名。查看解析argv的代码，或记录文件名的代码。

C ++ ifstream有奇数段错误，具体取决于文件在磁盘上的位置

1 个答案: