macOS permission denied

[liangjingkanji]

Line 19: - permission denied goroutine 4 [running]:

发生在

err := syscall.Mprotect(page, syscall.PROT_READ|syscall.PROT_WRITE|syscall.PROT_EXEC)
if err != nil {
    panic(err)
}

环境

• MacOS 11.6.1 (ARM64 M1 以及 X86都如此)
• 运行GoMonkey的最新Demo
• 使用的gomonkey 2.2.0

描述:

• 使用GOARCH=amd64可以解决, 但是无法debug很不幸.
• 在Linux/Windows都是正常
• macos-golink-wrapper 方案可以解决x86上此问题, 但是arm64依然不行
• 如果使用单元测试框架结果导致无法断点调试也是太影响了

[jinshanwang]

thanks

Original

From:"Zpl"< @.*** >;

Date:2023/10/14 23:56

To:"agiledragon/gomonkey"< @.*** >;

CC:"Joseph"< @. >;"Comment"< @. >;

Subject:Re: [agiledragon/gomonkey] macOS permission denied (Issue #70)

Test ok at Mac M1 13.2.1 Please follow step below to solve problem "permission denied" follow this issues steam solution and test at Mac M1.

Enjoy it and save your life, I donnot know why!

find this file modify_binary_darwin.go in your GoProjects/pkg

currently gomonkey version is @.***, please replace this file with code below directly package gomonkey import ( "syscall" "time" ) func modifyBinary(target uintptr, bytes []byte) { function := entryAddress(target, len(bytes)) err := mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_WRITE) if err != nil { panic(err) } copy(function, bytes) err = mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_EXEC) if err != nil { panic(err) } time.Sleep(time.Millisecond) } func mprotectCrossPage(addr uintptr, length int, prot int) error { pageSize := syscall.Getpagesize() for p := pageStart(addr); p < addr+uintptr(length); p += uintptr(pageSize) { page := entryAddress(p, pageSize) if err := syscall.Mprotect(page, prot); err != nil { return err } } return nil }
这个测试可用，但是这里的表述有点问题，我补充一下： 1、只需要修改文件modify_binary_darwin.go第7行，删除参数：syscall.PROT_EXEC 最终：err := mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_WRITE) 2、使用go test -gcflags=all=-l 进行测试

work for me

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: @.***>

[LargeOrange]

Test ok at Mac M1 13.2.1 Please follow step below to solve problem "permission denied" follow this issues steam solution and test at Mac M1.

• Enjoy it and save your life, I donnot know why!

1. find this file modify_binary_darwin.go in your GoProjects/pkg
2. currently gomonkey version is v2@v2.9.0, please replace this file with code below directly

package gomonkey

import (
    "syscall"
    "time"
)

func modifyBinary(target uintptr, bytes []byte) {
    function := entryAddress(target, len(bytes))
    err := mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_WRITE)
    if err != nil {
        panic(err)
    }
    copy(function, bytes)
    err = mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_EXEC)
    if err != nil {
        panic(err)
    }
    time.Sleep(time.Millisecond)
}

func mprotectCrossPage(addr uintptr, length int, prot int) error {
    pageSize := syscall.Getpagesize()
    for p := pageStart(addr); p < addr+uintptr(length); p += uintptr(pageSize) {
        page := entryAddress(p, pageSize)
        if err := syscall.Mprotect(page, prot); err != nil {
            return err
        }
    }
    return nil
}

这个测试可用，但是这里的表述有点问题，我补充一下： 1、只需要修改文件modify_binary_darwin.go第7行，删除参数：syscall.PROT_EXEC 最终：err := mprotectCrossPage(target, len(bytes), syscall.PROT_READ|syscall.PROT_WRITE) 2、使用go test -gcflags=all=-l 进行测试

worked for me.

[agiledragon]

v2.11.0 has been released!

[Nomango]

v2.11.0 has been released!

It works on my M2 Mac! 🎉

[gaochuwuhan]

The solution for mac with intel: add go tool args: -gcflags "all=-N -l" -ldflags="-extldflags="-Wl,-segprot,__TEXT,rwx,rx""

[arfan]

in mac M1 I get Process finished with the exit code 139 (interrupted by signal 11: SIGSEGV)

my code is

import (
    "fmt"
    "github.com/agiledragon/gomonkey/v2"
)

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

func main() {
    fmt.Println(add(5, 2))
    gomonkey.ApplyFunc(add, func(a, b int) int {
        return a * b
    })
    fmt.Println(add(5, 2))
}

im using version 2.11.0, golang 1.20.5

[HildaM]

I update gomonkey from v2.9.0 to v2.11.0 and finally fix this problem!

Additional info:

1. m1 pro
2. go 1.12
3. goconvey 1.7.2

[719010539]

收到!

[agiledragon]

I update gomonkey from v2.9.0 to v2.11.0 and finally fix this problem!

Additional info:

1. m1 pro
2. go 1.12
3. goconvey 1.7.2

@myzhan Good news!

[sidgwick]

执行到 mProtect 函数的时候还是在报错:

[719010539]

收到!

[xhd2015]

It seems that gomonkey is unstable. People are getting frequently trapped into this error. xgo has solved all the compatibility issues. If anyone want to try, check https://github.com/xhd2015/xgo for more details.