编译调试mono，并不复杂，首先在   http://www.go-mono.com/mono-downloads/download.html 下载源代码.

下载之后，按照 http://www.mono-project.com/Compiling_Mono_From_Tarball 所说的进行编译安装。（可以通过设置 ./Configure 的 --prefix=dirname 参数来指定安装目录。）

如下操作：

gdb mono

结果：

Reading symbols from /home/liulijin/monosvnbuild/bin/mono...done.

Mono support loaded.

(gdb) break mono_main

Breakpoint 1 at 0x80b3d0c: file driver.c, line 1291.

(gdb) run ~/cs/y.exe

Starting program: /home/liulijin/monosvnbuild/bin/mono ~/cs/y.exe

[Thread debugging using libthread_db enabled]

Breakpoint 1, mono_main (argc=2, argv=0xbffff424) at driver.c:1291

1291 setlocale (LC_ALL, "");

(gdb) print argc

$1 = 2

Reading symbols from /yourfoldername/bin/mono...done.

Mono support loaded.

(gdb) break mono_main

Breakpoint 1 at 0x80b3d0c: file driver.c, line 1291.

(gdb) run ~/cs/y.exe

Starting program: /home/liulijin/monosvnbuild/bin/mono ~/cs/y.exe

[Thread debugging using libthread_db enabled]

Breakpoint 1, mono_main (argc=2, argv=0xbffff424) at driver.c:1291

1291 setlocale (LC_ALL, "");

(gdb) print argc

通过源码生成的mono才有symbol信息，本来挺简单的东西，由于我不太熟悉linux环境，浪费了不少时间。。