英文:
Why does gdb output fatal error?
问题
我正在学习使用gdb来调试Go程序。Go的版本是1.2，运行在linux/amd64上。
这个Go程序非常简单：
package main
import "fmt"
func main(){
fmt.Printf("hello, world\n");
}
在使用gdb调试时，gdb的输出是：
$ gdb hello
GNU gdb (GDB) 7.6
版权所有 (C) 2013 Free Software Foundation, Inc.
GNU通用公共许可证第三版或更高版本 <http://gnu.org/licenses/gpl.html>
这是自由软件：您可以自由更改和重新发布它。
本软件没有任何保证，法律允许的范围内不提供任何保证。输入“show copying”和“show warranty”以获取详细信息。
此GDB配置为“x86_64-unknown-linux-gnu”。
有关错误报告说明，请参见：<http://www.gnu.org/software/gdb/bugs/>...
正在读取符号来自/data2/home/nanxiao/hello...完成。
正在加载Go运行时支持。
(gdb) start
在/data2/home/nanxiao/hello.go的第3行设置临时断点1，地址为0x400c00。
正在启动程序：/data2/home/nanxiao/hello
在/data2/home/nanxiao/hello.go的第3行，main.main ()：临时断点1
3 func main(){
(gdb) n
运行时错误：pc=0x400c13 0xcc 0xeb 0x48 0x83 0xec
致命错误：运行时错误：错误使用rewindmorestack
运行时堆栈：
runtime.throw(0x56325f)
/data2/soft/go/src/pkg/runtime/panic.c:464 +0x69
runtime.rewindmorestack(0xc210001148)
/data2/soft/go/src/pkg/runtime/sys_x86.c:41 +0xb4
runtime.newstack()
/data2/soft/go/src/pkg/runtime/stack.c:230 +0x153
runtime.morestack()
/data2/soft/go/src/pkg/runtime/asm_amd64.s:225 +0x61
根据我的理解，在运行了“n”命令之后，gdb应该执行下一条语句，并输出：
fmt.Printf("hello, world\n");
为什么会输出以下的“致命错误”？
运行时错误：pc=0x400c13 0xcc 0xeb 0x48 0x83 0xec
致命错误：运行时错误：错误使用rewindmorestack
非常感谢您的帮助！
英文:
I am studying to use gdb to debug Go program. The Go version is 1.2, and runs on linux/amd64.
The Go program is very simple:
package main
import "fmt"
func main(){
fmt.Printf("hello, world\n");
}
When using gdb to debug it, the gdb output is
$ gdb hello
GNU gdb (GDB) 7.6
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /data2/home/nanxiao/hello...done.
Loading Go Runtime support.
(gdb) start
Temporary breakpoint 1 at 0x400c00: file /data2/home/nanxiao/hello.go, line 3.
Starting program: /data2/home/nanxiao/hello
Temporary breakpoint 1, main.main () at /data2/home/nanxiao/hello.go:3
3 func main(){
(gdb) n
runtime: pc=0x400c13 0xcc 0xeb 0x48 0x83 0xec
fatal error: runtime: misuse of rewindmorestack
runtime stack:
runtime.throw(0x56325f)
/data2/soft/go/src/pkg/runtime/panic.c:464 +0x69
runtime.rewindmorestack(0xc210001148)
/data2/soft/go/src/pkg/runtime/sys_x86.c:41 +0xb4
runtime.newstack()
/data2/soft/go/src/pkg/runtime/stack.c:230 +0x153
runtime.morestack()
/data2/soft/go/src/pkg/runtime/asm_amd64.s:225 +0x61
Per my understanding, after running the "n" command, the gdb should go the next statement, and the output is:
fmt.Printf("hello, world\n");
Why does it output the following "fatal error"?
runtime: pc=0x400c13 0xcc 0xeb 0x48 0x83 0xec
fatal error: runtime: misuse of rewindmorestack
Thanks very much in advance!
答案1
得分: 3
这是版本1.2的问题。在版本1.2.1中已经修复了，你可以从以下链接下载：https://code.google.com/p/go/downloads/list
英文:
It was an issue with version 1.2. It's fixed in version 1.2.1, you can download it from: https://code.google.com/p/go/downloads/list
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