【发布时间】：2022-08-05 15:38:33
【问题描述】：
我使用 go 编写了 c-shared 库。
package main
import \"C\"
import \"log\"
//export RunLib
func RunLib() {
log.Println(\"Call RunLib\")
}
func init() {
log.Println(\"Call init\")
}
func main() {
log.Println(\"Call main\")
}
我使用以下命令创建了库：
go build -buildmode=c-shared -o lib.so lib.go
为了使用这个库，我写了这个 golang 代码。
package main
/*
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
static void callFromLib() {
void (*fn)();
void *h = dlopen(\"lib.so\", RTLD_LAZY);
if (!h) {
fprintf(stderr, \"Error: %s\\n\", dlerror());
return;
}
*(void**)(&fn) = dlsym(h, \"RunLib\");
if (!fn) {
fprintf(stderr, \"Error: %s\\n\", dlerror());
dlclose(h);
return;
}
fn();
dlclose(h);
}
*/
import \"C\"
func main() {
C.callFromLib()
}
如果我运行最后一个代码，它会抛出此错误 (go run call.go)：
fatal error: bad sweepgen in refill
goroutine 1 [running, locked to thread]:
runtime.throw({0xb990782, 0xc000042a38})
/usr/local/go/src/runtime/panic.go:1198 +0x71 fp=0xc000042a18 sp=0xc0000429e8 pc=0xb930691
runtime.(*mcache).refill(0x41215b8, 0x2)
/usr/local/go/src/runtime/mcache.go:156 +0x24e fp=0xc000042a68 sp=0xc000042a18 pc=0xb91434e
runtime.(*mcache).nextFree(0x41215b8, 0x2)
/usr/local/go/src/runtime/malloc.go:880 +0x85 fp=0xc000042ab0 sp=0xc000042a68 pc=0xb90ba85
runtime.mallocgc(0x8, 0xb9ba300, 0x1)
/usr/local/go/src/runtime/malloc.go:1071 +0x4e8 fp=0xc000042b30 sp=0xc000042ab0 pc=0xb90c108
runtime.growslice(0xb9ba300, {0x0, 0x41a1910, 0x2}, 0xc00009c000)
/usr/local/go/src/runtime/slice.go:267 +0x4ea fp=0xc000042b98 sp=0xc000042b30 pc=0xb94586a
sync.(*Pool).pinSlow(0xba394e0)
/usr/local/go/src/sync/pool.go:223 +0x105 fp=0xc000042c30 sp=0xc000042b98 pc=0xb960ec5
sync.(*Pool).pin(0xba394e0)
/usr/local/go/src/sync/pool.go:206 +0x4e fp=0xc000042c48 sp=0xc000042c30 pc=0xb960d8e
sync.(*Pool).Get(0xba394e0)
/usr/local/go/src/sync/pool.go:128 +0x25 fp=0xc000042c80 sp=0xc000042c48 pc=0xb960ac5
fmt.newPrinter()
/usr/local/go/src/fmt/print.go:137 +0x25 fp=0xc000042ca8 sp=0xc000042c80 pc=0xb985d45
fmt.Sprintln({0xc000042d38, 0x1, 0x1})
/usr/local/go/src/fmt/print.go:280 +0x28 fp=0xc000042cf0 sp=0xc000042ca8 pc=0xb986008
log.Println({0xc000042d38, 0x24, 0x0})
/usr/local/go/src/log/log.go:329 +0x1e fp=0xc000042d20 sp=0xc000042cf0 pc=0xb98cd5e
main.RunLib(...)
/Users/.../demo/lib.go:8
_cgoexp_6b951f94a90e_RunLib(0xc000042d90)
_cgo_gotypes.go:36 +0x45 fp=0xc000042d58 sp=0xc000042d20 pc=0xb98cf85
runtime.cgocallbackg1(0xb98cf40, 0xc000042e60, 0x0)
/usr/local/go/src/runtime/cgocall.go:306 +0x29a fp=0xc000042e28 sp=0xc000042d58 pc=0xb903d1a
runtime.cgocallbackg(0xc0000001a0, 0x300000002, 0xc0000001a0)
/usr/local/go/src/runtime/cgocall.go:232 +0x109 fp=0xc000042eb8 sp=0xc000042e28 pc=0xb9039e9
runtime.cgocallbackg(0xb98cf40, 0x7ffeefbff737, 0x0)
<autogenerated>:1 +0x2f fp=0xc000042ee0 sp=0xc000042eb8 pc=0xb95e32f
runtime: unexpected return pc for runtime.cgocallback called from 0x4053e00
stack: frame={sp:0xc000042ee0, fp:0xc000042f08} stack=[0xc000042000,0xc000043000)
0x000000c000042de0: 0x000000c000042d9d 0x000000c000042e18
0x000000c000042df0: 0x000000000b95843b <runtime.exitsyscall+0x00000000000000fb> 0x000000c0000001a0
0x000000c000042e00: 0x000000c000042dd8 0x0000000000000000
0x000000c000042e10: 0x000000000b9c3dc0 0x000000c000042ea8
0x000000c000042e20: 0x000000000b9039e9 <runtime.cgocallbackg+0x0000000000000109> 0x000000000b98cf40 <_cgoexp_6b951f94a90e_RunLib+0x0000000000000000>
...
<_cgoexp_6b951f94a90e_RunLib+0x0000000000000000>
0x000000c000042ea0: 0x00007ffeefbff737 0x000000c000042ed0
0x000000c000042eb0: 0x000000000b95e32f <runtime.cgocallbackg+0x000000000000002f> 0x000000c0000001a0
...
<runtime.cgocallback+0x00000000000000b4>
0x000000c000042ee0: <0x000000000b98cf40 <_cgoexp_6b951f94a90e_RunLib+0x0000000000000000> 0x00007ffeefbff737
...
runtime.cgocallback(0x4004165, 0x4058340, 0xc000042f70)
/usr/local/go/src/runtime/asm_amd64.s:915 +0xb4 fp=0xc000042f08 sp=0xc000042ee0 pc=0xb95c134
goroutine 1 [runnable, locked to thread]:
unicode.init()
/usr/local/go/src/unicode/tables.go:9 +0x79
exit status 2
但是，如果我使用 python 一切正常！
>>> import ctypes
>>> lib = ctypes.cdll.LoadLibrary(\"lib.so\")
>>> 2022/03/02 01:08:17 Call init
>>> lib.RunLib()
2022/03/02 01:08:22 Call RunLib
0
>>>
资讯
操作系统：macOS Big Sur 11.6.3 (20G415)
>>> clang --version
Apple clang version 13.0.0 (clang-1300.0.29.30)
>>> nm lib.so| grep RunLib
000000000008cfa0 T _RunLib
000000000008cf40 t __cgoexp_6b951f94a90e_RunLib
00000000000c4200 s __cgoexp_6b951f94a90e_RunLib.stkobj
>>> go env
GO111MODULE=\"on\"
GOARCH=\"amd64\"
GOBIN=\"\"
GOCACHE=\"~/Library/Caches/go-build\"
GOENV=\"~/Library/Application Support/go/env\"
GOEXE=\"\"
GOEXPERIMENT=\"\"
GOFLAGS=\"\"
GOHOSTARCH=\"amd64\"
GOHOSTOS=\"darwin\"
GOINSECURE=\"\"
GOMODCACHE=\"~/go/pkg/mod\"
GONOPROXY=\"\"
GONOSUMDB=\"\"
GOOS=\"darwin\"
GOPATH=\"~/go\"
GOPRIVATE=\"\"
GOPROXY=\"https://proxy.golang.org,direct\"
GOROOT=\"/usr/local/go\"
GOSUMDB=\"sum.golang.org\"
GOTMPDIR=\"\"
GOTOOLDIR=\"/usr/local/go/pkg/tool/darwin_amd64\"
GOVCS=\"\"
GOVERSION=\"go1.17\"
GCCGO=\"gccgo\"
AR=\"ar\"
CC=\"clang\"
CXX=\"clang++\"
CGO_ENABLED=\"1\"
GOMOD=\"~/projects/go/.../go.mod\"
CGO_CFLAGS=\"-g -O2\"
CGO_CPPFLAGS=\"\"
CGO_CXXFLAGS=\"-g -O2\"
CGO_FFLAGS=\"-g -O2\"
CGO_LDFLAGS=\"-g -O2\"
PKG_CONFIG=\"pkg-config\"
GOGCCFLAGS=\"-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/wl/9rtfdx8x7jvgyn6t8hpq7yh00000gn/T/go-build401121298=/tmp/go-build -gno-record-gcc-switches -fno-common\"
我用谷歌搜索并找到了这篇文章。但是文章里没有golang。
-
您不能在 Go 程序中使用 c 共享的 Go 库。
-
你有一些 25 行的 C 代码主要的代码——注释掉。这是故意的吗？
-
@LorinczyZsigmond 这是 cgo 代码！
-
@shranet 我没有看到
// #cgo LDFLAGS: -llib标志告诉 go 编译器在构建程序时链接共享库 -
@Chandan 我不需要它。我想动态使用该库。
标签： go