确定导致分段错误的代码行？ [英] Determine the line of code that causes a segmentation fault?

问题描述

如何确定错误在代码中导致分段错误的地方？

How does one determine where the mistake is in the code that causes a segmentation fault?

我的编译器（ gcc ）可以显示程序中故障的位置吗？

Can my compiler (gcc) show the location of the fault in the program?

推荐答案

GCC无法做到这一点，但是GDB（a 调试器）。使用 -g 开关编译程序，如下所示：

GCC can't do that but GDB (a debugger) sure can. Compile you program using the -g switch, like this:

gcc program.c -g

然后使用gdb：

$ gdb ./a.out
(gdb) run
<segfault happens here>
(gdb) backtrace
<offending code is shown here>

这里是入门GDB的不错的教程。

Here is a nice tutorial to get you started with GDB.

发生段错误的地方通常只是一个线索代码中的导致错误的地方。给定的位置不一定是问题所在。

Where the segfault occurs is generally only a clue as to where "the mistake which causes" it is in the code. The given location is not necessarily where the problem resides.

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