gdb:“未加载符号表"； [英] gdb: "No symbol table is loaded"

问题描述

尝试在 gdb 中添加断点时，我不断收到此错误消息.

I keep getting this error mesage when trying to add a breakpoint in gdb.

我已经使用这些命令进行编译:

I've used these commands to compile:

gcc -g main.c utmpib2.c -o main.o
and:
cc -g main.c utmpib2.c -o main.o
and also:
g++ -g main.c utmpib2.c -o main.o

我也尝试了-ggdb"而不是-g"，但我仍然收到该错误消息.

I also tried "-ggdb" instead of "-g" and I still get that error message.

然后我执行 gdb:

$gdb

在 gdb 中:

(gdb)exec-file main.o
(gdb)break 59
No symbol table is loaded. Use the "file" command.

推荐答案

首先，你拥有的是一个完全编译好的程序，而不是一个目标文件，所以去掉 .o 扩展名.现在，请注意错误消息的内容，它确切地告诉您如何解决您的问题:未加载符号表.使用文件"命令."

First of all, what you have is a fully compiled program, not an object file, so drop the .o extension. Now, pay attention to what the error message says, it tells you exactly how to fix your problem: "No symbol table is loaded. Use the "file" command."

(gdb) exec-file test
(gdb) b 2
No symbol table is loaded.  Use the "file" command.
(gdb) file test
Reading symbols from /home/user/test/test...done.
(gdb) b 2
Breakpoint 1 at 0x80483ea: file test.c, line 2.
(gdb) 

或者只是在命令行上传递程序.

Or just pass the program on the command line.

$ gdb test
GNU gdb (GDB) 7.4
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
[...]
Reading symbols from /home/user/test/test...done.
(gdb) b 2
Breakpoint 1 at 0x80483ea: file test.c, line 2.
(gdb) 

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