On Mon, Mar 18, 2019 at 8:17 PM <615912...@qq.com> wrote: > > shmid, _, err := syscall.Syscall(syscall.SYS_SHMGET, uintptr(10001), 1<<32, > IpcCreate|0600) > data_shmaddr, _, _ := syscall.Syscall(syscall.SYS_SHMAT, shmid, 0, 0) > C.memcpy(unsafe.Pointer(data_shmaddr+uintptr(per_offs)), > unsafe.Pointer((C.CString)(string(*data))), C.ulong(len(*data))) > > I'm trying to use syscall shmat/shmget, but it seems like i can't map all the > address that i wanted. > 'per_offs' is a int value far less than 1<<32, below is what i got. > > fatal error: unexpected signal during runtime execution > [signal SIGSEGV: segmentation violation code=0x1 addr=0x7fe3502cca80 > pc=0x7fe34d9320b4] > > runtime stack: > runtime.throw(0x552be5, 0x2a) > /data1/user1/go_env/go/src/runtime/panic.go:619 +0x81 > runtime.sigpanic() > /data1/user1/go_env/go/src/runtime/signal_unix.go:372 +0x28e > > goroutine 1 [syscall]: > runtime.cgocall(0x4fe960, 0xc4200edd40, 0x29) > /data1/user1/go_env/go/src/runtime/cgocall.go:128 +0x64 fp=0xc4200edd00 > sp=0xc4200edcc8 pc=0x403034 > main._Cfunc_memcpy(0x7fe3502cca80, 0x7fe3440008c0, 0x1, 0x0) > _cgo_gotypes.go:78 +0x4e fp=0xc4200edd40 sp=0xc4200edd00 pc=0x4fdb7e > main.(*MemPoolMng).PutData.func1(0x7fe3502cca80, 0x7fe3440008c0, 0x1, 0x1) > /data1/user2/GoServer/mempool_go/mempool_mgr.go:107 +0x99 fp=0xc4200edd78 > sp=0xc4200edd40 pc=0x4fe7a9 > main.(*MemPoolMng).PutData(0xc4200182d0, 0xc420158000, 0xf4240) > /data1/user2/GoServer/mempool_go/mempool_mgr.go:107 +0x1da fp=0xc4200ede58 > sp=0xc4200edd78 pc=0x4fe37a > main.handleProtoClient(0x565720, 0xc42000e060) > /data1/user2/GoServer/mempool_go/server.go:58 +0x16f fp=0xc4200eded0 > sp=0xc4200ede58 pc=0x4fcf8f > main.main() > /data1/user2/GoServer/mempool_go/server.go:39 +0x261 fp=0xc4200edf88 > sp=0xc4200eded0 pc=0x4fcca1 > runtime.main() > /data1/user1/go_env/go/src/runtime/proc.go:198 +0x212 fp=0xc4200edfe0 > sp=0xc4200edf88 pc=0x42b772 > runtime.goexit() > /data1/user1/go_env/go/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4200edfe8 > sp=0xc4200edfe0 pc=0x455601 > exit status 2
1) Always check the returned error value. 2) Show us a complete, standalone, program. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
