Golang中如何解决Signal SIGSEGV: segmentation violation code=0x1错误

如果您能展示完整的程序而不仅仅是一个片段，可能会更有帮助。您对 IpcCreate 使用了什么？您是如何声明 data 的？

在不了解这些信息的情况下，我基于您的示例进行了处理。我有以下代码：

package main

//#include <stdio.h>
//#include <string.h>
//#include <sys/ipc.h>
//#include <sys/shm.h>
//void *memcpy(void *dest, const void *src, size_t n);
//int printf(const char *format, ...);
//#define BUFSIZE 32
//void dump(char *p)
//{
//      int i;
//      for(i = 0; i < BUFSIZE; i++)
//              printf("%d: %d\n",i,p[i]);
//      printf("\n");
//}
import "C"

import (
        "fmt"
        "os"
        "syscall"
        "unsafe"
        )

const bufsize int = 32
const offset = 10

var IpcCreate uintptr
var per_offs int = offset
var buf [bufsize]byte
var data *[bufsize]byte

// a tag so we can recognize if it's copying properly
const tagsize int = 10
const tag byte = 42

func main() {
        data = &buf
        IpcCreate = C.IPC_CREAT

        shmid, _, err := syscall.Syscall(syscall.SYS_SHMGET, uintptr(10001), 1<<32, IpcCreate|0600)
        if err != 0 {
                fmt.Fprintf(os.Stderr,"Cannot get shared memory. Error %d\n", err)
                os.Exit(1)
        }
        data_shmaddr, _, err := syscall.Syscall(syscall.SYS_SHMAT, shmid, 0, 0)
        if err != 0 {
                fmt.Fprintf(os.Stderr,"Cannot attach to shared memory. Error %d\n", err)
                os.Exit(1)
        }

        // write the tag into the buffer

        for i := 0; i < tagsize; i++ { buf[i] = tag }

        // copy the buffer into the shared memory, starting at byte 10

        C.memcpy(unsafe.Pointer(data_shmaddr+uintptr(per_offs)),
                 unsafe.Pointer(data), C.ulong(len(*data)))

        // dump data[]
        // this shows that 42 is in locations 0-9

        fmt.Printf("\n")
        fmt.Printf("data:\n")
        C.dump(C.CString(string((*data)[:])))

        // dump bufsize bytes of shared memory area
        // this shows that 42 is in locations 10-19

        fmt.Printf("shared memory:\n")
        C.dump((*C.char)(unsafe.Pointer(uintptr(data_shmaddr))))
}

我认为这段代码实现了您想要的功能。如果没有，那么请更清楚地说明您的问题。

提醒大家：此程序使用了 Cgo 以及 unsafe 和 syscall 包。因此不要期望它具有跨平台兼容性。如果您有 Linux 系统，可以尝试运行它。