Closed
Description
What version of Go are you using (go version)?
go version go1.11beta1 linux/amd64
Does this issue reproduce with the latest release?
idk
What operating system and processor architecture are you using (go env)?
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/Desktop/gopath/"
GOPROXY=""
GORACE=""
GOROOT="/root/sdk/go1.11beta1"
GOTMPDIR=""
GOTOOLDIR="/root/sdk/go1.11beta1/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build339636739=/tmp/go-build -gno-record-gcc-switches"
VGOMODROOT=""
What did you do?
loader.go:
package main
import (
"fmt"
"syscall"
)
func main() {
var mod = syscall.NewLazyDLL("main.dll")
var proc = mod.NewProc("Test")
x0, x2, x3 := proc.Call()
fmt.Println( x0, x2, x3)
}
main.go:
package main
import (
"time"
"fmt"
)
import "C"
func main(){
}
//export Test
func Test() {
print("this is a test\n")
time.Sleep(time.Second *2)
fmt.Println("222222222222222\n")
}
Building:
GOOS=windows GOARCH=386 CGO_ENABLED=1 CC=i686-w64-mingw32-gcc go11 build -buildmode=c-shared -o main.dll main.go
What did you expect to see?
loader.exe
this is a test
[sleep]
222222222222222
What did you see instead?
loader.exe
this is a test
[sleep]
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x1 addr=0x0 pc=0x6ab435d4]
goroutine 1 [running]:
syscall.getprocaddress(0x73eb0000, 0x4306e010, 0x0, 0x0)
/root/sdk/go1.11beta1/src/runtime/syscall_windows.go:154 +0xc9
syscall.(*DLL).FindProc(0x43048000, 0x6abf33d8, 0xd, 0x0, 0x43072000, 0x6ac6a660)
/root/sdk/go1.11beta1/src/syscall/dll_windows.go:89 +0x54
syscall.(*LazyProc).Find(0x43040d20, 0x0, 0x0)
/root/sdk/go1.11beta1/src/syscall/dll_windows.go:264 +0xd4
syscall.(*LazyProc).mustFind(0x43040d20)
/root/sdk/go1.11beta1/src/syscall/dll_windows.go:278 +0x21
syscall.(*LazyProc).Addr(0x43040d20, 0x6ab74219)
/root/sdk/go1.11beta1/src/syscall/dll_windows.go:287 +0x21
syscall.WriteConsole(0x50, 0x43072000, 0x11, 0x12c7b8a8, 0x0, 0x11, 0x0)
/root/sdk/go1.11beta1/src/syscall/zsyscall_windows.go:1297 +0x27
internal/poll.(*FD).writeConsole(0x43064160, 0x43070000, 0x11, 0x20, 0x10, 0x43070000, 0x43060114)
/root/sdk/go1.11beta1/src/internal/poll/fd_windows.go:702 +0x2f6
internal/poll.(*FD).Write(0x43064160, 0x43070000, 0x11, 0x20, 0x0, 0x0, 0x0)
/root/sdk/go1.11beta1/src/internal/poll/fd_windows.go:649 +0xed
os.(*File).write(0x430420d0, 0x43070000, 0x11, 0x20, 0x10, 0x11, 0x43070000)
/root/sdk/go1.11beta1/src/os/file_windows.go:223 +0x3d
os.(*File).Write(0x430420d0, 0x43070000, 0x11, 0x20, 0x2, 0x50c6a0, 0x12c4c000)
/root/sdk/go1.11beta1/src/os/file.go:145 +0x51
fmt.Fprintln(0x6ac062f0, 0x430420d0, 0x12c7bdd8, 0x1, 0x1, 0x12c4c000, 0x6ac6ac60, 0x6ac6ac60)
/root/sdk/go1.11beta1/src/fmt/print.go:255 +0x6a
fmt.Println(0x12c7bdd8, 0x1, 0x1, 0x12c4c044, 0x12c4c0b4, 0x12c6a034)
/root/sdk/go1.11beta1/src/fmt/print.go:264 +0x45
main.Test()
/root/Desktop/gopath/src/dl/main.go:17 +0x89
main._cgoexpwrap_0bacd9f47ac1_Test()
_cgo_gotypes.go:45 +0x17
runtime: unexpected return pc for runtime.cgocallback_gofunc called from 0x446a1c
stack: frame={sp:0x12c7be64, fp:0x12c7be74} stack=[0x12c74000,0x12c7c000)
12c7bde4: 6ab86390 <runtime.call16+48> 00000004 43034000 00000001
12c7bdf4: 12c7be00 6ab438d7 <runtime.cgocallbackg1+343> 00000000 000dfe48
12c7be04: 000dfe9b 00000000 00000000 6e69616d
12c7be14: 6c6c642e 6ab6c4a3 <runtime.exitsyscall+355> 01c4c000 00000003
12c7be24: 00000002 12c4c000 12c4c000 6ab43703 <runtime.cgocallbackg+179>
12c7be34: 00000000 00000000 004025f5 00000000
12c7be44: 00000000 00000000 00000000 00000000
12c7be54: 00000000 12c7be78 12c4c000 6ab8751e <runtime.cgocallback_gofunc+126>
12c7be64: <00000000 0050c6a0 00447c30 !00446a1c
12c7be74: >00402609 00447c30 0050c8a8 12c48008
12c7be84: 00000400 0050c6a0 00000010 0043a80f
12c7be94: 00447c30 0050c8a8 00000000 0050c6a0
12c7bea4: 004541a1 6abbb510 00000000 00000000
12c7beb4: 00000000 00000000 00000004 0040cf9c
12c7bec4: 00000010 0049aa80 00000001 004243c2
12c7bed4: 00453fdc 0049aa80 12c320f0 6abbb510
12c7bee4: 00000000 00000000 00000000 6abbb510