晚上好，我一直在嘗試構建一個 golang 應用程序來掃描內存中的值，但我正在努力理解如何解決特定的內存位置。我知道在訪問應用程序中的內存時，您可以使用*variablename來尊重并獲取地址位置，但是我將如何提供地址位置并將值打印到屏幕或從 RAM 中獲取下一個分配的任意大小的對象并打印它的值?提前感謝您可能愿意分享的任何幫助
1 回答
翻過高山走不出你
TA貢獻1875條經驗 獲得超3個贊
我不知道這會有多大用處，但這里有一個示例代碼。
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”包不是一個好主意，我相信你也不能閱讀任何任意位置。
對我來說，當我嘗試其他一些隨機位置時，很可能我沒有讀取權限，它給我帶來了如下錯誤：
unexpected fault address 0xc41ff8f780
fatal error: fault
[signal SIGBUS: bus error code=0x2 addr=0xc41ff8f780 pc=0x1093ec0]
但希望它對你有一些價值。
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