为什么使用 cgdb 打开的调试文件不显示源代码

[Shiratsuyu]

• 使用 cgdb 调试一个编译好的文件，结果发现打开看到的并不是源代码，而是 LLVM 的编译输出：

   1│ // -*- C++ -*-
   2│ //===------------------------------ vector --------------------------------===//
   3│ //
   4│ //                     The LLVM Compiler Infrastructure
   5│ //
   6│ // This file is dual licensed under the MIT and the University of Illinois Open
   7│ // Source Licenses. See LICENSE.TXT for details.
   8│ //
   9│ //===----------------------------------------------------------------------===//
  10│
  11│ #ifndef _LIBCPP_VECTOR
  12│ #define _LIBCPP_VECTOR
  13│
  14│ /*
  15│     vector synopsis
  16│
  17│ namespace std
  18│ {
  19│
  20│ template <class T, class Allocator = allocator<T> >
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/vector                
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Reading symbols from PartialOrdering...done.
(gdb) l
849                                           data() + size(), data() + capacity());
850         }
851         void __annotate_increase(size_type __n) const
852         {
853           __annotate_contiguous_container(data(), data() + capacity(),
854                                           data() + size(), data() + size() + __n);
855         }
856         void __annotate_shrink(size_type __old_size) const
857         {
858           __annotate_contiguous_container(data(), data() + capacity(),
(gdb) help

• 吓得我赶紧又写了一个 helloworld 试了一下：

                                                                   _|  _|      
                                           _|_|_|    _|_|_|    _|_|_|  _|_|_|  
                                         _|        _|    _|  _|    _|  _|    _|
                                         _|        _|    _|  _|    _|  _|    _|
                                           _|_|_|    _|_|_|    _|_|_|  _|_|_|  
                                                         _|                    
                                                     _|_|                      

                                                   a curses debugger
                                                     version 0.6.8

                                        type  q<Enter>            to exit      
                                        type  help<Enter>         for GDB help 
                                        type  <ESC>:help<Enter>   for CGDB help



                                                                                                                        
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from hello...Reading symbols from /Users/Shiratsuyu/Documents/Codes/PartialOrdering/hello.dSYM/Contents/
Resources/DWARF/hello...done.
done.
(gdb) list
Line number 8 out of range; h.cpp has 7 lines.
(gdb) list 1
1       #include <iostream>
2       using namespace std;
3
4       int main(){
5               cout<<"Hello, World!"<<endl;
6               return 0;
7       }
(gdb) 

• 这都是什么鬼……
• …真的是没脾气了，怎么样才能让它老老实实的显示和 main.cpp 里一样的代码啊