使用 Golang 读取随机内存位置

Question

晚上好，我一直在尝试构建一个 golang 应用程序来扫描内存中的值，但我正在努力理解如何解决特定的内存位置。我知道在访问应用程序中的内存时，您可以使用*variablename来尊重并获取地址位置，但是我将如何提供地址位置并将值打印到屏幕或从 RAM 中获取下一个分配的任意大小的对象并打印它的值?提前感谢您可能愿意分享的任何帮助

Answer 1

我不知道这会有多大用处，但这里有一个示例代码。

package main

import (

    "fmt"

    "unsafe"

)

func main() {

    var i int = 1

    fmt.Println("Address : ", &i, " Value : ", i)

    var address *int

    address = &i // getting the starting address

    loc := (uintptr)(unsafe.Pointer(address))

    p := unsafe.Pointer(loc)

    // verification - it should print 1

    var val int = *((* int)(p))

    fmt.Println("Location : ", loc, " Val :",val) // it does print !!

    // lets print 1000 bytes starting from address of variable i

    // first memory location contains 1 as expected

    printValueAtMemoryLocation(loc, 1000)

    // now lets test for some arbitrary memory location

    // not so random ! wanted to reduce the diff value also any arbitrary memory location you can't read !!

    memoryToReach := 842350500000

    loc = changeToInputLocation(loc, memoryToReach)

    fmt.Println("Loc is now at : ", loc)

    // lets print 1000 bytes starting from the memory location "memoryToReach"

    printValueAtMemoryLocation(loc, 1000)

}

func changeToInputLocation(location uintptr, locationToreach int) uintptr {

    var diff,i int

    diff = locationToreach - int(location)

    fmt.Println("We need to travel ", diff, " memory locations !")

    if diff < 0 {

        i= diff * -1

        for i > 0 {

            location--

            i--

        }

    } else {

        i= diff

        for i > 0 {

            location++

            i--

        }

    }

    return location

}

func printValueAtMemoryLocation(location uintptr, next int) {

    var v byte

    p := unsafe.Pointer(location)

    fmt.Println("\n")

    for i:=1; i<next; i++ {

        p = unsafe.Pointer(location)

        v = *((*byte)(p))

        fmt.Print(v," ")

        //fmt.Println("Loc : ", loc, " --- Val : ", v)

        location++

    }

    fmt.Println("\n")

}

使用“不安全”包不是一个好主意，我相信你也不能阅读任何任意位置。

对我来说，当我尝试其他一些随机位置时，很可能我没有读取权限，它给我带来了如下错误：

unexpected fault address 0xc41ff8f780

fatal error: fault

[signal SIGBUS: bus error code=0x2 addr=0xc41ff8f780 pc=0x1093ec0]

但希望它对你有一些价值。