最近频频发生 段错误,gdb最后显示Previous frame inner to this frame (corrupt stack?)的问题.
gdb -c core.xxx文件查看 有如下显示:
#49 0x00000000 in ?? ()
#50 0x00001000 in ?? ()
#51 0x00000000 in ?? ()
#52 0x00001000 in ?? ()
#53 0x00000008 in ?? ()
#54 0x00000000 in ?? ()
#55 0x480381f0 in ?? ()
#56 0x00000000 in ?? ()
#57 0x480381f1 in ?? ()
#58 0x00000000 in ?? ()
#59 0x480381f1 in ?? ()
#60 0x00000000 in ?? ()
#61 0x00083be1 in ?? ()
#62 0x00000000 in ?? ()
#63 0x00737e98 in ?? ()
#64 0xbfffb384 in ?? ()
#65 0x00000001 in ?? ()
#66 0xbfffb258 in ?? ()
#67 0x0804cf21 in file2str (file=0x738780 "\001") at utils.c:129
Previous frame inner to this frame (corrupt stack?)
file2str这个函数用来将文件的内容返回为一个字符串:
char*
file2str(const char* file)
{
int fd;
int fsize; /*file size*/
struct stat sb;
char* str = NULL;
fd = open (file, O_RDONLY);
if(-1 == fd)
{
perror (""); //108行
return NULL;
}
fstat (fd, &sb);
fsize = sb.st_size;
/*获得文件大小*/
str = xnew_array (char, fsize + 1);
/*为str分配空间*/
if (!str)
{
close (fd);
return NULL;
}
if (fsize != read (fd, str, fsize))
{
xfree (str);
close (fd);
return NULL;
}
str[fsize] = '\0'; //129行
close(fd);
return str;
}
除了在129行发生段错误外,有时还会在108行perror出现问题.