英文:
Go: print variables with gdb
问题
在这个程序中，如何使用调试器中断执行并打印i的值？
package main
import "fmt"
func main() {
x := "abc"
i := 3
fmt.Println(i)
fmt.Println(x)
}
我无法打印i的值。但是我可以打印x的值：
go build test.go
gdb test
[...]Reading symbols from /home/ned/test...done.
(gdb) br 9
(gdb) run
(gdb) p i
No symbol "i" in current context.
(gdb) p x
$1 = "abc"
英文:
In this program, how can break execution with the debugger and print the value of i?
package main
import "fmt"
func main() {
x := "abc"
i := 3
fmt.Println(i)
fmt.Println(x)
}
I can't print i. However I can print x:
go build test.go
gdb test
[...]Reading symbols from /home/ned/test...done.
(gdb) br 9
(gdb) run
(gdb) p i
No symbol "i" in current context.
(gdb) p x
$1 = "abc"
答案1
得分: 4
它听起来像是变量i可能被编译器优化掉了。你尝试过使用调试构建吗？
你可以使用go build -gcflags '-N'。
英文:
It sounds like the variable i probably got optimized out of existence by the compiler. Did you try a debug build?
You can use go build -gcflags '-N'.
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