我只是想开始学习 C http://fromlearncodethehardway.com。但是,在尝试从那里编写其中一个示例时,我遇到了分段错误。这是我的源代码的链接。我尝试使用 valgrind 进一步帮助调试,但我似乎无法找出问题所在。这是来自 valgrind 的堆栈跟踪。
~/Chardway$ valgrind ./ex17 db.dat g
==4423== Memcheck, a memory error detector == 4423== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==4423== Using Valgrind-3.6.1-Debian and LibVEX; rerun with -h for copyright info
==4423== Command: ./ex17 db.dat g
==4423==
==4423== Invalid read of size 1
==4423== at 0x4EA4F1D: _IO_file_fopen@@GLIBC_2.2.5 (fileops.c:271)
==4423== by 0x4E99DB5: __fopen_internal (iofopen.c:93)
==4423== by 0x400A76: Database_open (ex17.c:65)
==4423== by 0x400F7C: main (ex17.c:151)
==4423== Address 0x722b is not stack'd, malloc'd or (recently) free'd
==4423==
==4423==
==4423== Process terminating with default action of signal 11 (SIGSEGV)
==4423== Access not within mapped region at address 0x722B
==4423== at 0x4EA4F1D: _IO_file_fopen@@GLIBC_2.2.5 (fileops.c:271)
==4423== by 0x4E99DB5: __fopen_internal (iofopen.c:93)
==4423== by 0x400A76: Database_open (ex17.c:65)
==4423== by 0x400F7C: main (ex17.c:151)
.....
==4423== For counts of detected and suppressed errors, rerun with: -v
==4423== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4)
Segmentation fault
对调试的任何帮助都会很棒。谢谢!