Table of Contents
如何使用 GDB 调试 Go 函数
设置环境
编译程序
启动 GDB
设置断点
运行程序
调试命令
实战案例
Home Backend Development Golang How to debug Golang functions using GDB?

How to debug Golang functions using GDB?

Apr 18, 2024 am 08:00 AM
linux go golang gdb

使用 GDB 调试 Go 函数步骤如下:安装 GDB 和 Go 调试包。启用调试信息编译程序。使用 GDB 启动程序。设置断点。使用 run 命令启动程序。使用调试命令进行调试。

如何使用 GDB 调试 Golang 函数?

如何使用 GDB 调试 Go 函数

Go 语言提供了 [gdb](https://www.gnu.org/software/gdb/) 集成,可用于调试 Go 程序。本教程将指导你如何使用 GDB 调试 Go 函数,并提供一个实战案例。

设置环境

首先,你需要安装 GDB 和 Go 调试包。对于 Linux 系统,可以使用以下命令:

sudo apt-get install gdb golang-go
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编译程序

接下来,编译你的 Go 程序,同时启用调试信息:

go build -gcflags="-N -l" main.go
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启动 GDB

运行 GDB 调试你的编译后的程序:

gdb main
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设置断点

要设置断点,请使用 break 命令,后跟函数名称或行号:

break myFunction
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运行程序

使用 run 命令启动程序,这将在到达第一个断点时暂停程序:

run
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调试命令

一旦程序在断点处暂停,你可以使用以下 GDB 命令进行调试:

  • next: 继续执行,跳过当前语句。
  • step: 继续执行,逐行执行。
  • print: 打印变量或表达式的值。
  • info locals: 打印当前函数中的局部变量。
  • continue: 继续执行,直到下一个断点。

实战案例

以下是一个示例,演示如何使用 GDB 调试函数 myFunction

// main.go
package main

import "fmt"

func myFunction(a, b int) int {
    return a + b
}

func main() {
    fmt.Println(myFunction(1, 2))
}
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编译程序:

go build -gcflags="-N -l" main.go
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运行 GDB:

gdb main
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设置断点:

(gdb) break myFunction
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运行程序:

(gdb) run
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在断点处暂停后,打印局部变量 ab

(gdb) print a
$1 = 1
(gdb) print b
$2 = 2
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继续执行函数:

(gdb) next
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打印函数的返回值:

(gdb) print $3
$3 = 3
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继续执行程序:

(gdb) continue
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最后,打印程序的输出:

(gdb) print $6
$6 = 3
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