我有一个gdb没有正确打印变量的问题。 简单的方案是建立在以下方式:golang gdb - 打印变量
chmurson-osx:helloworld chmurson$ go build -gcflags '-N' start.go
然后GDB执行:
chmurson-osx:helloworld chmurson$ gdb start -d $GOROOT
GNU gdb (GDB) 7.8
Copyright (C) 2014 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-apple-darwin14.0.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<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 start...done.
warning: Missing auto-load scripts referenced in section .debug_gdb_scripts
of file /Users/chmurson/Dev/goprojects/misc/src/helloworld/start
Use `info auto-load python-scripts [REGEXP]' to list them.
(gdb)
(gdb) source /usr/local/go/src/pkg/runtime/runtime-gdb.py
Loading Go Runtime support.
这是我下一步:
(gdb) list
1 package main
2
3 import "fmt"
4
5 func main() {
6 x := "abc"
7 i := 3
8 fmt.Println(i)
9 fmt.Println(x)
10 }
(gdb) b 9
Breakpoint 1 at 0x2106: file /Users/chmurson/Dev/goprojects/misc/src/helloworld/start.go, line 9.
(gdb) run
Starting program: /Users/chmurson/Dev/goprojects/misc/src/helloworld/start
3
[New Thread 0x1113 of process 14039]
Breakpoint 1, main.main() at /Users/chmurson/Dev/goprojects/misc/src/helloworld/start.go:9
9 fmt.Println(x)
(gdb) p x
Python Exception <type 'exceptions.OverflowError'> signed integer is greater than maximum:
$1 =
(gdb) p i
$2 = 8725692800
(gdb)
你可以看到有一个Python异常在检查'p'变量时,显示'i'的值时完全不是3。怎么了 ?
这是我去的版本
chmurson-osx:helloworld chmurson$ go version
go version go1.3.1 darwin/amd64
和GDB配置
(gdb) show configuration
This GDB was configured as follows:
configure --host=x86_64-apple-darwin14.0.0 --target=x86_64-apple-darwin14.0.0
--with-auto-load-dir=:${prefix}/share/auto-load
--with-auto-load-safe-path=:${prefix}/share/auto-load
--with-expat
--with-gdb-datadir=/usr/local/share/gdb (relocatable)
--with-jit-reader-dir=/usr/local/lib/gdb (relocatable)
--without-libunwind-ia64
--without-lzma
--with-python=/System/Library/Frameworks/Python.framework/Versions/2.7
--without-guile
--with-separate-debug-dir=/usr/local/lib/debug (relocatable)
--with-zlib
--without-babeltrace
("Relocatable" means the directory can be moved with the GDB installation
tree, and GDB will still find it.)
降级转到1.2.x的确有一招。 Gdb调试器非常漂亮地打印这些变量。另外Go运行时间源自动加载,无需每次都手动插入它们。 Go 1.3并不是必须要求我,因为我是Go world的新手,所以我很高兴。稍后将尝试查看gccgo的工作方式。谢谢! – chmurson 2014-09-21 19:17:35